| Plenary Sessions | |
| LCT | Workshop on LC Science and Technologies |
| AMD | Workshop on Active Matrix Displays |
| FMC | Workshop on FPD Manufacturing, Materials and Components |
| PH | Workshop on Inorganic Emissive Display and Phosphors |
| OLED | Workshop on OLED Displays and Related Technologies |
| 3D | Workshop on 3D/Hyper-Realistic Displays and Systems |
| VHF | Workshop on Applied Vision and Human Factors |
| PRJ | Workshop on Projection and Large-Area Displays and Their Components |
| EP | Workshop on Electronic Papers and Nonvolatile Displays |
| MEET | Workshop on MEMS and Emerging Technologies for Future Displays and Devices |
| DES | Workshop on Display Electronic Systems |
| FLX | Workshop on Flexible Electronics |
| INP | Workshop on Touch Panels and Input Technologies |
| DXR | Topical Session on DX Sensing and Radiation Imaging |
| IST | Topical Session on Image Sensing Technologies |
| MVS | Topical Session on Metaverse System |
Plenary Sessions
| Dec. 4 | 9:00-9:30 | Opening |
| Dec. 4 | 9:30-11:30 | Keynote Addresses |
| Dec. 4 | 19:00-21:00 | Display Night |
| Dec. 6 | 15:00-16:40 | Special Session: Evolution of Image and Video Generation Using AI and Generative AI |
Opening
Dec. 4 9:00-9:30 Conference Hall
Master of Ceremony: Hiroyuki Mori (Executive Chair, IDW ’24)
Opening Remarks
Yasunori Kijima (General Chair, IDW ’24)
John Kymissis (President, SID)
Norihiro Suzuki (President, ITE)
Hirotsugu Yamamoto (Program Chair, IDW ’24)
Kobayashi-Uchiike-Mikoshiba Prize Award Ceremony
Mutsumi Kimura (Director, IDW General Incorporated Association)
Keynote AddressesDec. 4 9:30-11:30 Conference Hall
Chair: Hirotsugu Yamamoto (Program Chair, IDW ’24)
| Keynote Address-1
9:30 |
Total Solution for Innovative Display Materials Jung H. Hah SK Materials (Korea) |
| Keynote Address-2
10:00 |
Semi-Transparent CMOS Backplane for Advanced Near-to-Eye Microdisplays Uwe Vogel Fraunhofer Institute for Photonic Microsystems IPMS (Germany) |
| Keynote Address-3
10:30 |
Dawn of Society 5.0 – VR · Generative AI · Metaverse – Michitaka Hirose The University of Tokyo (Japan) |
| Keynote Address-4
11:00 |
Unleashing the Power of AI in Augmented Reality: Redefining the Future of Display Technology Barry Silverstein Meta Platforms (USA) |
Dec. 4 19:00-21:00 Conference Hall
Dec. 6 15:00-16:40 Conference Hall
Chair: Haruhiko Okumura (Toshiba)
Co-Chair:Yuzo Hisatake (Shizuoka University)
| 1
15:00 |
Software Defined Vehicle: ECU consolidation, Vehicle OS and AGI Tsuguo Nobe Nagoya University (Japan) |
| 2
15:30 |
Smarter HI (Human Interface) Enhanced by AI and Generative AI – In Case of Cybernetic Avatar and NICT – Miwako Doi National Institutes of Information of Communications Technology (Japan) |
| 3
16:00 |
Predicting the Impact of Generative AI on Art from Technological Trends and How to Engage with AI Yoshiyuki Kobayashi Sony (Japan) |
| 4
16:20 |
Towards the Realization of Immersive Media: Display and Acquisition Technologies for 3D and AR/VR Services Hisayuki Sasaki NHK Foundation / NHK (Japan) |
Workshop on LC Science and Technologies
| Dec. 4 | 13:00-14:00 | Small Hall | LCT1 | High-PPI LC Technologies for AR/VR |
| Dec. 4 | 14:50-15:50 | Small Hall | LCT2 | Novel Materials and Analysis Technologies for LCD |
| Dec. 4 | 16:40-18:00 | Small Hall | LCT3 | LC films for AR/VR and Reflective Displays |
| Dec. 5 | 15:20-16:20 | Mid-sized Hall B | LCT4 | LC Technologies for 5G/6G |
| Dec. 6 | 10:50-12:10 | Room 206 | LCT5 | LC Alignment and Sensors |
| Dec. 6 | 13:30-14:50 | Room 206 | LCT6 | LC Optical Devices |
| Dec. 5 | 13:50-15:10 | Main Hall | LCTp1 | LC Science and Devices |
LCT1: High-PPI LC Technologies for AR/VR
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 4 13:00-14:00 Small Hall
Chair: Seiji Shibahara (Sony)
Co-Chair: Koichi Miyachi (JSR)
| LCT1-1
13:00 |
Invited Anti-Flexoelectric Effect Liquid Crystal in Fringe-Field Switching Display *Bo-Cheng Tao1, Wen-Chieh Chou1 1. AUO Corporation (China) |
| This article uses Slichem's anti-flexoelectric effect n-FFS liquid crystal material, which is the main polar liquid crystal monomer for structural adjustment. In addition, a trace amount of free radical scavenger HALS Like additive is added to enhance the anti-backlight aging characteristics. The results confirm that the image sticking of the experimental group is significantly improved, and it is equally in optical performance. | |
| LCT1-2
13:20 |
Invited Developing New Ferroelectric Liquid Crystal for LCOS and SLM *Tomohiro Ando1, Yuta Kanamori1, Manabu Nakamura1, Michelle Livingston2, Christopher Gabriel2, R. Scott Hathcock2, Takuya Yanagisawa1 1. CITIZEN FINEDEVICE CO., LTD. (Japan), 2. Miyota Development Center of America, Inc. (United States of America) |
| Ferroelectric liquid crystals (FLCs) have two attractive characteristics: very fast switching speeds and stable alignment against electrical fringe fields from neighboring pixels. At this time, we have succeeded in developing a new FLC which has an improved temperature range, with a wider SmC phase, and which is more stable, thus making it less likely to have alignment defects, for LCOS and SLM. | |
| LCT1-3L
13:40 |
Invited Ultra High 2117-PPI LCD VR Display Devices *Yanqing Chen1, Jianyun Xie1, Yezhou Fang1, Jian Sun1, Jie Tong1, Ning Wang1, Peng Liang1, Hailin Xue1 1. BOE Technology Group Co., Ltd (China) |
| In this paper, we proposed a 2117-PPI Fast LCD Device with LTPO and Color Filter On Array technologies. We used real RGB with higher physical resolution instead of Sub Pixel Rendering technology. We adopted the “Smart BM” technology to reduce the Screen Door Effect and the Electric Field Enhancement technology to enhance the LC efficiency. We have developed the Planarization Hole Filling technology which can ... |
LCT2: Novel Materials and Analysis Technologies for LCD
Dec. 4 14:50-15:50 Small Hall
Chair: Masaru Inoue (TOYOTech)
Co-Chair: Jeong-Hee Sung (Merck Electronics Ltd.)
| LCT2-1
14:50 |
Challenges and Solutions of Achieving High-Speed Response Weak Azimuth Anchoring IPS LCD *Yalun Yin1, Takahiro Noda1, Kazutoshi Miyake1, Shinya Ohno1, Toshiyuki Higano1, Kohei Goto1 1. Nissan Chemical Corporation (Japan) |
| We describe a high-speed response Weak Azimuth Anchoring (WA) alignment technology to achieve low power consumption IPS LCD. By optimizing the liquid crystal and the alignment materials, higher transmittance as well as the same response time and image sticking performance as the conventional FFS mode LCD with negative dielectric anisotropy LC mixtures (n-FFS) was achieved. | |
| LCT2-2
15:10 |
Analysis of Halo Perception and Its Impact on Setup Requirements in the Context of Mask-Free Measurements *Ingo Rotscholl1, Ramazan Ayasli2, Maxim Schmidt3, Kilian Kirchhoff1, Tanja Thiele1, Karlheinz Blankenbach4, Chihao Xu2, Donald Schaffer5 1. TechnoTeam Bildverarbeitung GmbH (Germany), 2. Saarland University (Germany), 3. Lattice Semiconductor (Germany), 4. Pforzheim University (Germany), 5. Dexerials Europe BV (Germany) |
| Halo visibility data of measured FALD LCDs is used to test different halo perception metrics. A focus is the determination of the evaluation area as it highly impacts the setup conditions of mask-free halo measurements. Some of the metrics show an excellent correlation to human perception and can be considered as possible halo perception candidates for future studies. | |
| LCT2-3
15:30 |
Invited A Net-Zero Display with Cholesteric Liquid Crystal Technology *I-An Yao1, Wei-Cheng Lee1, Po-Yang Chen1, Ping-Chun Yao1, Jiunn-Shyong Lin1, Yung-Hsun Wu1, Chiu-Lien Yang1 1. Innolux Display Corporation (Taiwan) |
| A color-reflective LCD with high optical performances and cost-effective structure has been proposed by cholesteric liquid crystal technology. By way of color dithering algorithm and waveform module (WF) in SOC, we demonstrated a 13.3-inch Ch-LCD with a high resolution of 202 PPI, high reflectance of 30%, and high color gamut of 20%, which is suitable for electronic signage applications. |
LCT3: LC films for AR/VR and Reflective Displays
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 4 16:40-18:00 Small Hall
Chair: Yukio Hirano (JNC Petrochemical)
Co-Chair: Moritsugu Sakamoto (Nagaoka University of Technology)
| LCT3-1
16:40 |
Invited Novel Brightness Enhancement Film Technology for Reflective LCDs *Akira Sakai1, Ryosuke Saigusa1, Naru Usukura1, Yuichi Kawahira1, Takeshi Oyama1, Kiyoshi Minoura1 1. Sharp Corporation (Japan) |
| Reflective LCDs offer the significant advantage of low power consumption; however, their brightness can be inconsistent since they rely on ambient light as a source. To enhance light efficiency, we combined reflective LCDs with the Pancharatnam-Berry deflector (PBD), a diffractive optical element that manipulates the propagation of incident light. | |
| LCT3-2
17:00 |
Uniformity Optimization Strategy on a Large-Size PVG-Based Waveguide Display for AR-HUD *Ran Wei1, Canran Yang1, Chuang Wang1, Yishi Weng1, Yuning Zhang1 1. Southeast University (China) |
| Polarization volume grating (PVG) is applied widely for augmented reality (AR) near-eye display (NED) lately due to its excellent diffractive performance. Here, we introduce a unique simulation analysis method via the large-size PVG-based waveguide technology for AR-HUD using the self-built Particle Swarm Optimization (PSO) algorithm. | |
| LCT3-3
17:20 |
Invited Reactive Mesogen Technology for Next Generation Pancake Lenses for Advanced Virtual Reality (VR) Devices *Norihiko Tanaka1, Jeong-Hee Sung1, Owain Wittek Parri2, Michael Wittek3, Melanie Klasen-Memmer3 1. Merck Electronics Ltd. (Japan), 2. Merck Performance Materials Ltd (UK), 3. Merck Electronics KGaA (Germany) |
| Augmented Reality (AR) and Virtual Reality (VR) technology has revolutionized digital experiences, and liquid crystal (LC) technology plays a pivotal role in advancing AR/VR devices. Reactive Mesogens are polymerisable liquid crystals that can be processed into a variety of thin anisotropic optical components. | |
| LCT3-4L
17:40 |
Design and Simulation Modeling of Focused Light-Field Camera with Polarization-Dependent Switchable Microlens Array with Depth Region Matching Scheme *Tae-Hyun Lee1, Sungjin Lim1, Min-Kyu Par1, Ki-Dong Lim1, Hak-Rin Kim2, Kyung-Il Joo1 1. Korea Photonics Technology Institute (Korea), 2. Kyungpook National University (Korea) |
| We propose the 2D/3D switchable focused light-field (LF) camera system to enhance the spatial resolution and depth of field range with single camera module. To match the depth plane of 2D and 3D images, a switchable polarization-dependent concave lens is implemented. The performance of the designed 2D/3D switchable focused LF camera system was validated through simulation modeling. |
LCT4: LC Technologies for 5G/6G
Dec. 5 15:20-16:20 Mid-sized Hall B
Chair: Mitsuru Chida (Sharp Display Tech.)
Co-Chair: Hiroyuki Okada (Univ. of Toyama)
| LCT4-1
15:20 |
Invited Phased Array Antenna and Reflectarray in Terahertz Wave Using Microfiber/Liquid Crystal Composite *Hiroshi Moritake1, Yo Inoue1, Trong Nghia Lang1 1. National Defense Academy (Japan) |
| Phased array antenna and reflectarray with 100 GHz band of terahertz wave using microfiber/liquid crystal composite are composed. The phased array antenna exhibits continuous steering across a broad range of approximately 83°, a high gain of nearly 11 dBi and short switching times below 260 ms. Composed reflectarray exhibits significant continuous beam steering capabilities ranging from −41° to 40° with switching time below 230 ms. | |
| LCT4-2L
15:40 |
Invited Advanced Technologies for Microwave Liquid Crystals *Holger Maune1 1. Otto-von-Guericke University (Germany) |
| Liquid crystals have become essential in microwave engineering, offering tunable and reconfigurable components. Key innovations including hybrid biasing schemes, additive manufacturing and advanced planar processing are discussed. Advances in LC-based devices such as fully 3D-printed antennas and reflective intelligent surfaces enhance performance and flexibility, supporting next-generation wireless communication technologies. | |
| LCT4-3L
16:00 |
Reflection Properties of Liquid-Crystal Millimeter-Wave Metasurfaces as Phase Shifters *Michinori Honma1, Taichi Okamoto1, Ryota Ito1, Toshiaki Nose1 1. Akita Prefectural University (Japan) |
| This study proposed a liquid crystal (LC) millimeter-wave (MMW) metasurface with an orthogonally combined wire grid electrode structure. We aimed to develop reflective LC MMW phase shifters. The reflection phase change under a voltage application was assessed by conducting computer simulations and experimental measurements. Consequently, the reflection phase changed by approximately 300° for a thin LC layer (40 µm) device. |
LCT5: LC Alignment and Sensors
Dec. 6 10:50-12:10 Room 206
Chair: Fumito Araoka (RIKEN)
Co-Chair: Hiroyuki Yoshida (Kwansei Gakuin University)
| LCT5-1
10:50 |
Design of Liquid Crystal-based Optical Transducer for Food Poisoning Bacteria *Yena Choi1, Jin-Kang Choi1, Won-Sik Kim1, Jisu Shin1, Chang Yun Son1, Minjae Lee2, Young-Ki Kim1 1. Pohang University of Science and Technology (Korea), 2. Kunsan National University (Korea) |
| Rapid, simple, sensitive, and selective recognition of salmonella that causes food poisoning disease is necessary for food-safety and prevention of pathogenic infection. However, laborious and time-consuming process which is required in previous methods put a limit on rapid detection for target. Herein, we propose liquid crystal (LC)-based system to allow simple and remarkably sensitive detection for salmonella via optical response of LCs. | |
| LCT5-2
11:10 |
Control of Selective Responsiveness of Liquid Crystals Using Organic Ionics *Jin-Kang Choi1, Yena Choi1, Won-Sik Kim1, Minjae Lee2, Chang Yun Son1, Young-Ki Kim1 1. Pohang University of Science and Technology (Korea), 2. Kunsan National University (Korea) |
| Although the great sensitivity of liquid crystals (LCs), LC based chemoresponsive system have relatively poor selectivity and controllability. We propose chemoresponsive LC system integrated with organic ionics (OI). We rationally design the OI with headgroup, aliphatic tail and counter ion. The system exhibits not only high selectivity/sensitivity to target chemical, but also controllability. | |
| LCT5-3
11:30 |
Liquid Crystal-Based Optical Detection for Ethylene *Seoyeon Park1, Jun-Hyung Im1, Jin-Kang Choi1, Won-Sik Kim1, Jangmin Kim1, Young-Ki Kim1 1. Pohang University of Science and Technology (Korea) |
| Ethylene is an important phytohormone involved in plants' overall growth. Therefore, it is necessary to check its concentration sensitively. In this work, we designed a sensitive ethylene gas sensor with liquid crystals (LCs) that can sensitively detect stimuli that enter the inside with their unique characteristics (e.g. birefringence, elasticity, etc.). In advance, PdCl2 catalyst is introduced into LC-based sensor for selectivity. | |
| LCT5-4
11:50 |
Spontaneous Liquid Crystal Alignment Realized on Self-Assembled Triclinic Crystalline Rubrene *Rab Nawaz1, Mudassar Iqbal1, Che-Ju Hsu1, Chi-Yen Huang1 1. National Changhua University of Education (Taiwan) |
| Organic rubrene dipersion in liquid crystals (LCs) induces a triclinic crystalline rubrene structure on the substrates, resulting in the homogeneous LC alignment. The spontaneous LC alignment technique provides a high thermal stability, fast response time, and low operation voltage, showing a great potential for flexible application. |
LCT6: LC Optical Devices
Dec. 6 13:30-14:50 Room 206
Chair: Michinori Honma (Akita Pref. Univ.)
Co-Chair: Yukihiro Kudoh (Kogakuin Univ.)
| LCT6-1
13:30 |
Rewritable Liquid Crystal Waveguide Device Based on Dynamic Scattering *Chun-Ting Wu1, Pravinraj Selvaraj1, Yuan-Chang Tsai1, Chi-Tang Huang1, Cheng-Kai Liu1, Ko-Ting Cheng1 1. National Central University (Taiwan) |
| We studied sodium dodecyl sulfonate (SDS) ions doped in negative cholesteric liquid crystals (CLCs) using a PVK film on ITO substrates. The PVK film blocks DC fields and becomes conductive under UV light, enabling bistable light waveguide displays. | |
| LCT6-2
13:50 |
Continuously Electronically Controlled Linear Polarization Rotator *Yi-Xuan Liu1, Chi-Tang Huang1, Pravinraj Selvaraj1, Ko-Ting Cheng1 1. National Central University (Taiwan) |
| Dynamic polarization control based on twisted-nematic liquid crystal (TNLC) has widely developed in display. Here, we propose a thin 90° TNLC cells that enable the unique feature of electrotunable linear polarization rotation with high degree of linear polarization. Our work extends to designing tandem 180° TNLC devices, demonstrating linear polarization rotation regardless of incident light's polarization. | |
| LCT6-3
14:10 |
Hyperspectral Filters via Oblique Helicoidal Cholesteric Liquid Crystals with Elastomeric Polymer Networks *Jun-Hyung Im1, Yeongseon Choi1, Eunsu Cho1, Daeseop Choi1, Won-Sik Kim1, Hyein Kim1, Young-Ki Kim1 1. Pohang University of Science and Technology (Korea) |
| Spectral filters play a key role in analyzing spectral information. However, previous filters have limitations in poor color purity, low transmittance, and low tunability. Here we demonstrate a hyperspectral tunable filter by using polymer-stabilized oblique helicoidal cholesteric liquid crystal, providing high level tuning in transmission wavelength with narrow bandwidth (< ∼20 nm). | |
| LCT6-4L
14:30 |
Chiral Sensor by Simultaneous Emission of Orthogonal Handedness in Circular Polarization *Gi-Eun Kim1, So-Young Jang1, So-Young Sim1, Ju-Young Kim1, Ye-Kang Ku1, Jae-Hoon Kim1, Chang-Jae Yu1 1. Hanyang University (Korea) |
| Circularly polarized organic light-emitting diodes (CP-OLEDs) have significant application potential in various fields, prompting extensive research to achieve a high degree of circular polarization. This paper proposes a novel emitting layer structure to enhance the CP of mesogenic light-emitting molecules. The effectiveness of this approach is validated through the fabrication and testing of chirality sensing devices. |
LCTp1: LC Science and Devices
Dec. 5 13:50-15:10 Main Hall
| LCTp1-1 | Dual-Mode Multifocal Liquid Crystal Microlens Array *Che Ju Hsu1, Mareena Antony1, Chi Yen Huang1 1. National Changhua University of Education (Taiwan) |
| A novel tunable multifocal liquid crystal microlens array (TMLCMA) can be operated in convex and concave modes through driving schemes. Under applied voltages, the focal length of microlens radially changes from the TMLCMA border to the center, showing the multifocal property. Axially-symmetric LC reorientation allows the TMLCMA to be polarization-insensitive. | |
| LCTp1-2 | Laser Beam Homogenizer Using Multifocal Liquid Crystal Microlens Arrays *Mudassar Iqbal1, Rab Nawaz1, Mareena Antony1, Che-Ju Hsu1, Chi-Yen Huang1 1. National Changhua University of Education (Taiwan) |
| A laser beam homogenizer is developed using a tunable multifocal liquid crystal microlens array (TMLCMA). This proposed TMLCMA enables functioning at monofocal convex, multifocal convex, and multifocal concave modes. It successfully mitigates the lattice effect of beam homogenization by conventional microlens arrays and expands beam with a flat-top intensity profile. | |
| LCTp1-3 | Spatially Continuous Linear-Polarization Rotator Using Twisted Nematic Liquid Crystals with Continuously Twisted Angles *Jin-Jie Ou1, You-Yu Wang2, Kai-Wen Huang2, Hui-Chi Lin2, Ko-Ting Cheng1 1. National Central University (Taiwan), 2. National Formosa University (Taiwan) |
| We introduce a versatile liquid crystal device with homogeneous alignment, twisted nematic, and transition regions, enabling dynamic phase retardation, polarization rotation, and modulation of incident light for innovative photonic applications. | |
| LCTp1-4 | Polarization Volume Grating With Rapid Wavelength-Tunable Based on Helfrich Deformation Yu-Chieh Li1, Li-Min Chang1, Cheng-Kuan Wu1, *Chun-Ta Wang1 1. National Sun Yat-Sen University (Taiwan) |
| This study demonstrates the development of rapid wavelength-tunable polarization volume gratings (PVGs) devices based on Helfrich deformation. This approach achieves a blue shift of over 100 nm in the Bragg band by applying voltage and exhibits a rapid response time. This device demonstrates the potential for future applications. | |
| LCTp1-5 | Azo-Dye Photo-Alignment Technique for Multi-Domain Vertical Alignment LCDs *Man Chun Tseng1, Hon Wah Chiu1, Hon Lung Cheung1, Yuk Lung Cheung1, Shu Tuen Tang1, Olena Vashchenko1, Valerii Vashchenko1, Fion Sze Yan Yeung1, Hoi Sing Kwok1 1. The Hong Kong University of Science and Technology (Hong Kong) |
| Vertically aligned LCDs (VA LCDs) offer high contrast but limited viewing angles. The Hong Kong University of Science and Technology has developed a multi-domain VA LCD technology using azo-dye photo-alignment. This cost-effective approach overcomes VA LCD's viewing angle limitations, enabling improved overall display performance suitable for LCD TVs, mobile devices, and automotive applications. | |
| LCTp1-6 | Improve Free-Sync Level for A-Si VA Display Technology *Bing Li1, Ming Yi Chen1, Xin Lin1 1. Chuzhou HKC Optoelectronics Technology Co. Ltd. (China) |
| In this article, we propose several approaches to enhance Free-sync performance. By analyzing the TFT device model and identifying relevant factors based on the principles of Free-sync testing, we optimize process parameters, refine code, and improve pixel design to elevate the Free-sync capability of the product | |
| LCTp1-7 | The Influence of Dual Alignment on the Lattice Orientation of Blue Phase Liquid Crystals *Jia-Yu Cao1, Ting-Mao Feng1, Duan-Yi Guo1, Kamil Orzechowski2, Chun-Ta Wang1 1. National Sun Yat-sen University (Taiwan), 2. Warsaw University of Technology (Poland) |
| This paper proposes a novel composite alignment technique that allows for the creation of dual alignment structures on glass substrates. These structures include both hybrid alignment (HA) and vertical alignment (VA). We investigate the growth mechanism of blue phase liquid crystals (BPLCs) within these structures. This research is expected to significantly contribute to the future development of photonic crystal research and its applications. | |
| LCTp1-8 | Optical Window Film for Enhanced Privacy *Hwa Jun Jeon1, Gyu Jin Choi1, Jeong Won Ryu1, Jin Seog Gwag1 1. Yeungnam University (Korea) |
| This study introduces a micro optical structure film for smart windows, achieving asymmetric transparency. This film consists of absorption layer, high index and low index (air) materials for producing total internal reflection in periodical prism type shape. The film allows opacity in one direction and transparency in another, enhancing privacy. | |
| LCTp1-9 | Study on Light-Emitting Liquid Crystal Device with High Contrast Ratio Using AIEE-Dye *Gyu Jin Choi1, Jeong Won Ryu1, Hwa Jun Jeon1, Jin Seog Gwag1 1. University of Yeungnam (Korea) |
| To enhance contrast ratio of light emitting liquid crystal device (LELCD) using AIEE-dye, we fabricated LELCD samples using an alignment layer having relatively weak anchoring energy to surface liquid crystals. As a result, a contrast ratio of about 30:1 was achieved. | |
| LCTp1-10 | Strategies to Prevent a Typical Mura During Cell Fabrication from Material Adjustment and Process Improvement *Wenliang Huang1, Shuang Lu1, Ting Zhao1, Jie Chen1, Ji Li1 1. TCL China Star Optoelectronic Technology Co, Ltd. (China) |
| Poor uniformity of TFT-LCD alignment will lead to drop mura, resulting in a decrease in panel quality. In this paper, the formation mechanism of drop mura was analyzed based on materials and manufacturing process. Finally, we solved this problem by designing the PI additive and adjusting the LC droplet parameters. | |
| LCTp1-11 | Multi-Stable Hazy State Smart Window *Jeong Won Ryu1, Gyu Jin Choi1, Hwa Jun Jeon1, Jin Seog Gwag1 1. Yeungnam University (Korea) |
| In this paper, we propose a novel approach to low-power consumption smart windows by realizing multi- stable haze states through electroconvection in chiral nematic liquid crystals. Experimental results show that the stable states depend on frequency, and the ratio of focal conic and planar states determine the degree of haze. | |
| LCTp1-12 | Alignment of Nematic Liquid Crystals on the ReS2 *Sujin Bang1, Jeon-Sun Yu2, Jae Hoon Lee1, Jong-Hyun Kim1,2 1. Chungnam National University (Korea), 2. Institute of Quantum Systems (Korea) |
| In recent years, rhenium disulfide (ReS2), a two-dimensional semiconductor, has attracted significant attention due to its unique anisotropic properties that are not commonly found in other two-dimensional materials. We confirmed the relation between the Re-chains, which serve as the standard for the anisotropic properties of ReS2, and the director of nematic liquid crystals. We controlled ReS2 flakes by manipulating ... | |
| LCTp1-13 | Control of Elongated Particles Dispersed in Nematic Liquid Crystals Using UV Light *Jae-Hui Kang1, Jun-Yong Lee2, Jong-Hyun Kim1,2 1. Chungnam National University (Korea), 2. Quantum System (Korea) |
| The position of the particles was controlled using the elasticity of the nematic liquid crystal. The system's free energy can be described as a function of the position and angle of the particles. Furthermore, the controlling force on the particles was numerically analyzed. The trajectory of the particles inside the liquid crystal can be visualized. | |
| LCTp1-14 | Ultra-Fast Response Speed Display Technology Development Based on PSVA Mode *Jiahui Li1, Mengqing Zhu1, Lisong Fu1, Bangyin Peng1, Chungching Hsieh2, Peng Du2 1. Suzhou China Star Optoelectronics Technology Co., Ltd. (China), 2. TCL China Star Optoelectronics Technology Co., Ltd. (China) |
| To improve the response speed of polymer PSVA mode LCD gaming monitors. Through the development of high specification liquid crystal material, the adjustment of manufacture procedure, the optimize of display drivers, and the design of product architecture. We realized the research target of GTG without OD 3.Xms, and completed the technical reserve for GTG without OD less than 3.0ms. | |
| LCTp1-15 | A New Fast-Response VA-FFS LC Device Using Three-Voltage Design With Improved Transmission *Wing-Kit Choi1, Bo-Kai Tseng1, Chia-Hsiang Tung1 1. National Taiwan University (Taiwan) |
| We propose a new design to enhance the transmission of a fast-response VA-FFS LC device by using a new three-electrode design while maintaining the fast response speed of these devices. These devices are very attractive for fast-response LC applications and have been actively developed and employed for VR/AR applications in recent years. | |
| LCTp1-16L | Test Standards, Methods, and Apparatus for Transparent Display *Pei-Yu Chu1, Yan-Rou Wang2, Ya-Hsuan Chen3, Pei-Chun Chen1, Yi-Ping Wang1, Kazuto Nishikawa4, Frank Huang5 1. Ming Chi University of Technology (Taiwan), 2. Advantech (Taiwan), 3. Industrial Technology Research Institute (Taiwan), 4. TOPCON Technohouse Corporation (Japan), 5. Denkei Technical Partner (Taiwan) |
| Transparent displays are gradually being applied in retail, tourism, and other fields. Therefore, this research is to develop standard measurement techniques required for transparent display, including the formulation of standard testing specifications and verification systems. Thus, analyses will be conducted on transmittance, uniformity, and performance in bright room environments. | |
| LCTp1-17L | Innovative Transparent LCD Solutions for Smart Retail Applications *Yan-Rou Wang1, Yu-Qi Tang1, Bo-Liang Wu1, Pei-Chun Chen1, Nick Yeh2, Johnny Lin2, Jason Hong2, Liang Lin2, Ya-Hsuan Chen1,3, Pei-Yu Chu1,4, Chin-Hsiang Lin1, Yi-Ping Wang1 1. Ming Chi University of Technology (Taiwan), 2. Higgstec (Taiwan), 3. Industrial Technology Research Institute (Taiwan), 4. Mediatek (Taiwan) |
| With smart retail on the rise, transparent displays are popular. High OLED and Micro-LED costs are an issue, but LCD technology with improved films and combined touch offers a solution. This study shows that conventional TFT-LCDs can be used for transparency and mirror functions, which is ideal for smart retail. | |
| LCTp1-18L | Robust Structure and Fabrication Method of Flexible Liquid Crystal Devices Using Plastic Microtubes *Yuto Sugaya1, Masakazu Nakatani1, Hideo Fujikake1 1. Tohoku University (Japan) |
| We proposed a new device structure using plastic microtubes to realize robust flexible liquid crystal devices. It was demonstrated that a uniform initial alignment can be obtained in the microtubes. We also fabricated a prototype device using the tube bonding technique and confirmed the basic operation of the device. | |
| LCTp1-19L | Design of a Liquid Crystal Metasurface with an Orthogonal Wire-Grid Electrode for Millimeter-Wave Applications *Taichi Okamoto1, Michinori Honma1, Ryota Ito1, Toshiaki Nose1 1. Akita Prefectural University (Japan) |
| It is necessary to establish a design scheme for a liquid crystal metasurface with an orthogonal wire-grid electrode, which exhibits a significant change in millimeter-wave (MMW) transmittance upon the application of a voltage. In this study, the dependence of MMW transmittance on the width and array period of an Al electrode, which represents the device performance, is investigated in detail to produce the design scheme. | |
| LCTp1-20L | Enlargement of Incident Angular Range in Liquid Crystal Lenses for Concentrating Solar Cells *Hiroaki Kashihara1, Masakazu Nakatani1, Hideo Fujikake1 1. Tohoku University (Japan) |
| We proposed a liquid crystal (LC) alignment design method and a device structure to achieve planar microtracking for sunlight using LC lenses. Through the analysis of LC alignment and diffracted light, we confirmed a high intensity of focused light along a single plane in the proposed liquid crystal alignment. | |
| LCTp1-21L | Optimization of Liquid Crystal Devices for Optical Quantum Phase Control *Akira Terazawa1, Hiroyuki Okada1 1. University of Toyama (Japan) |
| The TN cell is inserted into one optical path in the Mach-Zehnder interferometer. We obtained a pattern change when voltage was applied to the LC cell due to the change in the optical interference state. As a result, a change in the number of photons under weak light conditions is observed. | |
| LCTp1-22L | Effect of Liquid Crystal Elastic Constants on Quasi-Twisted Nematic Orientation *Rumiko Yamaguchi1, Naoki Yoshida1 1. Akita University (Japan) |
| A twisted hybrid aligned nematic orientation turns to a conventional TN orientation when the polar anchoring strength of the homeotropic surface is less than the critical one. The relationship between elastic constants K11, K22 and K33 of the liquid crystal is numerically clarified to establish the quasi-TN orientation. | |
| LCTp1-23L | Fast Response Technologies of Thick Polymer-Network LC for Millimeter-Wave Modulation *Shizuki Oguro1, Masakazu Nakatani1, Takahiro Ishinabe1, Hiroyasu Sato1, Qiang Chen1, Hideo Fujikake1 1. Tohoku University (Japan) |
| We propose two methods for improving decay response times in thick polymer-network LC devices of reflect arrays for millimeter-wave phase modulation. We clarified that both fast-response and low-voltage LC driving can be achieved by heat treatment after UV exposure or UV pattern exposure. The response time was decreased to 1/10. | |
| LCTp1-24L | Evaluation of Azimuthal Anchoring Energy to Vertically Aligned Twisted Nematic Liquid Crystal *Ryoma Terasawa1, Munehiro Kimura1, Yosei Shibata1, Tadashi Akahane1 1. Nagaoka University of Technology (Japan) |
| In this presentation, the applied voltage to the vertically aligned twisted nematic (VATN) at which the director near the alignment film surface becomes almost horizontal was verified by the numerical simulation, ellipsometric parameters were measured with a transmission spectroscopic ellipsometer under the applied voltage, and the twist angle and surface azimuthal anchoring energy were calculated from the numerical fitting procedure. |
Workshop on Active Matrix Displays
| Dec. 4 | 16:40-18:00 | Room 107 | AMD1 | Oxide TFT (1) |
| Dec. 5 | 9:00-10:20 | Mid-sized Hall A | AMD2 | Advanced TFT Technology |
| Dec. 5 | 10:50-12:10 | Mid-sized Hall A | AMD3 | Oxide TFT (2) |
| Dec. 5 | 13:30-14:50 | Room 204 | AMD4 | Oxide TFT (3) |
| Dec. 6 | 9:00-10:20 | Mid-sized Hall A | AMD5/FMC7 | Oxide TFT Manufacturing Technology |
| Dec. 6 | 10:50-11:50 | Mid-sized Hall A | AMD6/IST4 | Active-Matrix Sensing and Imaging Technologies |
| Dec. 6 | 13:30-14:50 | Mid-sized Hall A | AMD7 | Micro/Mini-LED Display |
| Dec. 4 | 13:20-14:40 | Main Hall | AMDp1 | Active-Matrix Device (1) |
| Dec. 4 | 15:10-16:30 | Main Hall | AMDp2 | Active-Matrix Device (2) |
AMD1: Oxide TFT (1)
Dec. 4 16:40-18:00 Room 107
Chair: Toshiaki Arai (Japan Display)
Co-Chair: Keisuke Omoto (Apple)
| AMD1-1
16:40 |
Invited Improvement in the Reliability for Polycrystalline Indium Oxide Based Thin-Film Transistors by Epitaxial Passivation Layers Prashant R. Ghediya1, Yusaku Magari1, Hikaru Sadahira1, Takashi Endo1, Mamoru Furuta2, Yuqiao Zhang3, Yasutaka Matsuo1, *Hiromichi Ohta1 1. Hokkaido University (Japan), 2. Kochi University of Technology (Japan), 3. Jiangsu University (China) |
| Although polycrystalline In2O3 thin-film transistors (TFTs) show outstandingly high field effect mobility of 140 cm2 V-1 s-1, there is a serious drawback in the reliability. We show that the In2O3-TFTs passivated with Y2O3 and Er2O3 films are ... | |
| AMD1-2
17:00 |
Invited Extraction of Intrinsic Field-Effect Mobility in Thin-Film Transistors Using In2O3-Related Oxide Semiconductors *Takanori Takahashi1, Yukiharu Uraoka1 1. Nara Institute of Science and Technology (Japan) |
| We have demonstrated extraction of intrinsic field-effect mobility based on transmission line model in typical top-contact/bottom-gate type thin-film transistors using high-mobility crystalline oxide semiconductor channel. The channel and contact/parasitic resistances are extracted and discussed which are essential for understanding device operation and mobility estimation. | |
| AMD1-3
17:20 |
Effects of Boron Doping and Underlying Layer Insertion on Active Layer of In2O3-based TFTs *Mototaka Ochi1, Aya Hino1, Tetsuya Miyazawa1, Taizoh Sadoh2, Hiroshi Goto3 1. Kobe Steel, Ltd. (Japan), 2. Kyushu University (Japan), 3. Kobelco Research Institute Inc. (Japan) |
| Significant improvement of film quality of In2O3 grown by Low-Temperature Solid-Phase Crystallization (SPC) was confirmed using EBSD measurements and TFT mobility. As a guide to the mechanism of its crystallinity enhancement, effects of film quality improvement of polycrystalline In2O3 by boron (B) doping and film quality control by insertion of underlying layer were found. | |
| AMD1-4
17:40 |
Highly Reliable Hydrogen-Doped Polycrystalline Indium Oxide Top-Gate Thin-Film Transistor (InOx:H TFT) with Hydrogen-Free SiO2 Gate Insulator and Boron Implanted Source and Drain Regions *Mir Mutakabbir Alom1, Motoki Ando1, Yoshihiro Sato2, Takafumi Kambe2, Tsutomu Satoyoshi2, Toshimasa Ui3, Keisuke Yasuta3, Yuya Yamane3, Junichi Tatemichi3, Mamoru Furuta1 1. Kochi University of Technology (Japan), 2. Tokyo Electron Technology Solutions Ltd. (Japan), 3. Nissin Ion Equipment Co., Ltd. (Japan) |
| We demonstrated a top-gate self-aligned (TG-SA) hydrogen-doped polycrystalline Indium oxide (poly-InOx:H) thin film transistor with a hydrogen-free SiO2 gate insulator. The TG-SA poly-InOx:H TFT operated in enhancement mode after 300°C annealing, exhibited excellent stability under negative gate bias and temperature stress, with no Vth shift at 60°C for 6,000s. |
AMD2: Advanced TFT Technology
Dec. 5 9:00-10:20 Mid-sized Hall A
Chair: Kazumasa Nomoto (Sony)
Co-Chair: Hiromi Minemawari (AIST)
| AMD2-1
9:00 |
Invited Low Voltage DNTT-Based Organic TFT: Layout, Device Characteristics, and Circuit Design *Takashi Sato1, Kunihiro Oshima1, Qin Zhaoxing1 1. Kyoto University (Japan) |
| This paper reviews recent developments in bottom-gate top-contact organic thin-film transistors based on DNTT, operating at supply voltages below 3V. The advancements in device structure and the impact of layout on current characteristics are evaluated through experimental measurements. Additionally, circuit design examples, including logic circuits and a spiking neural network, are discussed. | |
| AMD2-2
9:20 |
Invited On the Scalability of Nanosheet Oxide Semiconductor FETs *Masaharu Kobayashi1, Kaito Hikake1, Xingyu Huang1, Sunghun Kim1, Kota Sakai1, Zhuo Li1, Tomoko Mizutani1, Takuya Saraya1, Toshiro Hiramoto1, Takanori Takahashi2, Mutsunori Uenuma2, Yukiharu Uraoka2 1. The University of Tokyo (Japan), 2. Nara Institute of Science and Technology (Japan) |
| We have investigated the scaling potential of nanosheet oxide semiconductor FETs (NS OS FETs) for monolithic 3D integration in terms of ALD material engineering, high-field transport, and statistical variability. The highlights are: (1) systematic comparison among InGaO, InZnO and InGaZnO grown by ALD, (2) demonstration of unsaturated carrier velocity behavior in sub-100nm gate length, (3) comparable variability of NS OS FETs against Si CMOS. | |
| AMD2-3
9:40 |
Impact of Oxygen Content in IGZO on MW of FeTFTs *Heyoung Kang1, Seung Hee Cha1, Jae Kyeong Jeong1 1. Hanyang University (Korea) |
| This study examines the effect of changing PO2 during IGZO sputter deposition on FeTFTs' electrical properties. MW peaked at 1.8V for 5% PO2 and decreased with higher PO2, while carrier mobility declined due to reduced VO. Vth shifted positively up to 10% PO2 and negatively at 20%. XPS revealed that oxygen concentration during deposition ... | |
| AMD2-4L
10:00 |
Development of a 2.15-Inch Ultra High-Resolution LCD with 2527-ppi Using LTPO Technology *Motochika Yukawa1, Akihiro Hanada1, Takuo Kaitoh1, Hajime Watakabe1, Masashi Tsubuku1 1. Japan Display Inc. (Japan) |
| We have developed a 2.15-inch ultra high-resolution LCD with a pixel density of 2527 ppi on a glass substrate, specifically for use in VR-HMDs. This display integrates low-temperature polycrystalline silicon and oxide (LTPO) and color filter on array (COA) technologies, particularly using oxide TFTs with a channel width/length = 1 µm/1.75 µm in the pixels. |
AMD3: Oxide TFT (2)
Special Topic of Interest on Artificial Intelligence and Smart Society
Dec. 5 10:50-12:10 Mid-sized Hall A
Chair: Mutsumi Kimura (Ryukoku Univ.)
Co-Chair: Kenichi Takatori (Huawei Techs. Japan)
| AMD3-1
10:50 |
Invited Investigation of Hybrid IGZO and LTPS Thin-Film Transistor for 1,218 ppi Head-Mounted Display *Takushi Shinohara1, Atsushi Hachiya, Prashant R. Ghediya, Kazuatsu Ito, Yuich Saitoh, Hiroaki Furukawa, Yujiro Takeda, Hiroshi Matsukizono, Yasuhisa Itoh 1. Sharp corporation (Japan) |
| An investigation of a 2.48-inch LCD panel with 1,218 ppi, for Head-Mounted Display was successfully mass produced. The device using hybrid CMOS-LTPS and IGZO TFTs structure achieves high resolution and high transmittance simultaneously. The fabricated LCD panel is highly reliable, enduring 1,000 hours in aging tests, and has been mass-produced. | |
| AMD3-2
11:10 |
Invited Multi-Valued Inverse Problem Analysis for TFT *Masatoshi Kimura1, Keisuke Ide1, Hideo Hosono1, Toshio Kamiya1 1. Institute of Science Tokyo (Japan) |
| We developed a machine-learning model to quickly solve multi-valued inverse problems for semiconductor properties in thin-film transistors (TFTs) directly from their I-V characteristics. Simple inverse mapping with neural network (NN) does not work well for multi-valued problems. We succeeded in building a high-accuracy model by connecting a forward NN model with an inverse NN model, providing semiconductor properties with high accuracies R2 > 0.99. | |
| AMD3-3
11:30 |
A New Functional Circuit for Selective Scan Driving in Displays *Minjae Jeong1,2, Young Wook Kim1, Ki Taeg Shin2, Hoon Jeong2, Jeong Ki Park2, Hyun Jae Kim1 1. Yonsei University (Korea), 2. LG Display (Korea) |
| This paper proposes a new circuit that is composed of 4 transistors, 1 capacitor and additional 3 signals. By adding this circuit to a conventional scan driver, the scan driver can generate scan signals only in a selected area. We fabricated 12-stage scan driver using oxide TFT and verified the output waveform characteristics. | |
| AMD3-4
11:50 |
Low Power Display Panel Design and Driving Scheme for AMOLED Displays *Sangmoo Choi1, Chao Zhang1, Yifan Chiang1, Simon Tong1 1. Google LLC (United States of America) |
| For the recent high resolution and high refresh rate AMOLED displays, we update our previous proposal, uni-color column line Pentile-type pixel arrangement. In addition, we propose another, which not only includes all power saving factors of the previous proposal, but also it could give additional power reduction of around 13% for the image content independent driving power consumption for QHD+, 6.x inch diagonal AMOLED displays. |
AMD4: Oxide TFT (3)
Dec. 5 13:30-14:50 Room 204
Chair: Hiroki Hamada (Kindai Univ.)
Co-Chair: Keisuke Omoto (Apple)
| AMD4-1
13:30 |
Invited The Value of ALD Oxide Semiconductor Thin Film Transistor Beyond Mobility-Reliability Trade-Off Yoon-Seo Kim1, *Jin-Seong Park1 1. Hanyang University (Korea) |
| We synthesized high-quality, atomically ordered IGZO layers using plasma-enhanced ALD, achieving transistors with ultra-high mobility (>100 cm2/Vs). By controlling plasma power, we optimized precursor reactions, enhancing both electrical performance and stability, offering valuable insights for future display and semiconductor applications. | |
| AMD4-2
13:50 |
Extremely Excellent Negative-Bias Illumination Stress Stability of Atomic Layer Deposited In-Ga-O Thin-Film Transistors *Shengjie Yang1, Xiao Li1, Jianhua Yan1, Xinwei Wang1, Shengdong Zhang1, Lei Lu1 1. Peking University (China) |
| The AOS TFTs suffer from serious threshold voltage change under negative-bias illumination stress (NBIS). This study examines how annealing affects the NBIS stability of PEALD oxide TFTs. Annealing at 300 °C to 450 °C improved the threshold voltage shift during 3600 seconds of NBS from −8 V to −0.04 V, and NBIS to −0.57 V. These results indicate that high-temperature annealing repairs deep-level defects and widens the bandgap, enhancing NBIS stability significantly. | |
| AMD4-3
14:10 |
Channel Deposition Engineering of Novel a-IGZO TFT with ALD Process *Chen Gu1,2, Chuanke Chen1,2, Chunyu Zhang1,2, Ziheng Bai1, Di Geng1,2 1. Chinese Academy of Sciences (China), 2. University of Chinese Academy of Sciences (China) |
| The a-IGZO thin film transistors are proposed, with the active layer deposited by atomic layer deposition (ALD). The characteristics of ALD a-IGZO TFT are better than those of sputtering-IGZO film (SPU) TFT. The stability of ALD device is studied. The device shows no obvious degradation after 400 °C annealing. By optimizing the ALD process, the Vth and SS of ALD devices are improved obviously. | |
| AMD4-4L
14:30 |
High Mobility Polycrystalline Oxide Thin Film Transistors for 12.6 inch AMOLED Display *Xue Liu1, Qidi Liu1, Guowen Yan4, Mengsen Wang1, Xuyang Zhang1, Yinghai Ma1, Fa-Hsyang Chen2, Wangfeng Xi3, Rubo Xing2, Xiujian Zhu2 1. Yungu (Gu'an) Technology Co.,Ltd. (China), 2. Kunshan Govisionox Optoelectronics Co., Ltd. (China), 3. Jiangsu Huixian Display Technology Co., Ltd. (China), 4. Hefei Visionox Technology Co.,Ltd. (China) |
| A high mobility polycrystalline oxide thin film transistors has been fabricated on the Gen. 4.5 glass substrate. The device shows high field-effect mobility (μFE)∼44 cm2 /Vs with threshold voltage (Vth) of 0.07V, the device shows a good uniformity and reliability, Vth shift positively around 1V under positive bias temperature stress of 12h, 12.6 inch AMOLED panel shows a good display uniformity. |
AMD5/FMC7: Oxide TFT Manufacturing Technology
Dec. 6 9:00-10:20 Mid-sized Hall A
Chair: Susumu Horita (JAIST)
Co-Chair: Hirohiko Nishiki (Mitsui Kinzoku)
| AMD5/FMC7-1
9:00 |
Invited Fluorination Technology for Reliable Metal-Oxide Thin-Film Transistors Man Wong1, *Wei Jiang1 1. The Hong Kong University of Science and Technology (China) |
| Plasma-based fluorination has been reported to enhance the performance of metal-oxide thin-film transistors. The effectiveness of fluorination can be improved by conducting a pre-fluorination non-oxidizing anneal. It is also affected by process conditions including fluorination temperature, as well as post-fluorination air exposure and drive-in. | |
| AMD5/FMC7-2
9:20 |
Effects of Sequential Anneals in Sealed and Oxidizing Ambiences on Oxide Thin-Film Transistors *Jingyu Fan1, Jianming Zhu1, Xiao Li1, Zhendong Jiang1, Yunping Wang1, Dan Yang1, Zeyu Cai1, Shengdong Zhang1, Lei Lu1 1. Peking University (China) |
| The PBTS stability of the IGZO EMMO TFT has been improved from by sequential annealed after the channel was sealed by the impermeable metal layer. Furthermore, the shifted Vth of the TFT sequential annealed is −1 V, suffering post N2 anneals, while the shifted Vth of O2 post annealed TFT is about −15 V. | |
| AMD5/FMC7-3
9:40 |
Top-Gate IGZO TFT With Dry Etching Process for High-Resolution Display Application *Zhang Chunyu1,2, Chen Chuanke1,2 1. IMECAS (China), 2. University of Chinese Academy of Sciences (China) |
| In this study, we fabricated IGZO TFTs that IGZO film was patterned by a Cl-based dry etching process. The transfer characteristics of the device are analyzed. The fabricated IGZO TFT shows SS of 81.26 mV/Dec, mobility of 17.02 cm2/Vs and Vth of −1V. The reliability performance of NBS at −5V bias for 3600 seconds were also studied. These results ... | |
| AMD5/FMC7-4L
10:00 |
Highly Reliable Hydrogen-Free Top-Gate Oxide TFT ~ Hydrogen-Free ICP-CVD SiO2 and SiNx films for TFTs ~ *Mamoru Furuta1, Mir Mutakabbir Alom1, Motoki Ando1, Yoshihiro Sato2, Takafumi Kambe2, Tsutomu Satoyoshi2 1. Kochi University of Technology (Japan), 2. Tokyo Electron Technology Solutions Ltd (Japan) |
| In this presentation, hydrogen-free SiO2 and SiNx films were successfully deposited by large-area inductively coupled plasma chemical vapor deposition (ICP-CVD) using hydrogen-free source gases. The self-aligned top-gate hydrogen-free In-Ga-Zn-Sn-O (IGZTO) TFT is demonstrated toward highly reliable oxide TFTs. |
AMD6/IST4: Active-Matrix Sensing and Imaging Technologies
Dec. 6 10:50-11:50 Mid-sized Hall A
Chair: Hideya Kumomi (Japan S&T Agency)
Co-Chair: Masayuki Ikebe (Hokkaido University)
| AMD6/IST4-1
10:50 |
Invited Conformable Organic Image Sensor for Bioimaging *Tomoyuki Yokota1 1. The University of Tokyo (Japan) |
| We developed a conformable organic image sensor comprising low-temperature polycrystalline silicon thin-film transistors and organic photodiodes. The conformable organic image sensor has a high-resolution and high-speed readout characteristics. These characteristics enable measurement of the pulse wave signal and capture images of fingerprints and veins. | |
| AMD6/IST4-2
11:10 |
Invited Integration of Organic Photodetector (OPD) into OLED Displays for Sensing Applications *Taisuke Kamada1, Kazuya Sugimoto1, Yasuhiro Niikura1, Ryo Hatsumi1, Kazunori Watanabe1, Daisuke Kubota1, Sachiko Yamagata1, Shunpei Yamazaki1 1. Semiconductor Energy Laboratory Co., Ltd. (Japan) |
| We propose novel methods for integrating organic photodetector (OPD) into OLED panels for sensing applications such as fingerprint authentication. Our newly developed device called OLED/OPD dual-mode device and metal maskless lithography (MML) technology enable the integration without harming the display performance of OLED panels. | |
| AMD6/IST4-3
11:30 |
Invited Curved CMOS Image Sensors Developed by SOI Transfer Technology *Masahide Goto1, Shigeyuki Imura1, Hiroto Sato1 1. NHK Science & Technology Research Laboratories (Japan) |
| We report the development of curved complementary metal-oxide-semiconductor image sensors (CISs) using silicon-on-insulator transfer technology. The 11-μm-thick device layer was transferred to a flexible substrate and mounted on a cylindrical concave stage. The curved CISs successfully operated, demonstrating lens aberration correction. This development highlights the potential for various flexible devices, including sensors, memories, and displays. |
AMD7: Micro/Mini-LED Display
Special Topic of Interest on Micro/Mini LEDs
Dec. 6 13:30-14:50 Mid-sized Hall A
Chair: Masahide Inoue (Huawei Techs. Japan)
Co-Chair: Goshi Biwa (Sony Semiconductor Solutions)
| AMD7-1
13:30 |
Invited Advanced Full-Color MicroLED Micro-Display Technology with μ-PixeLED Solution Chih-Ling Wu1, Yen-Yeh Chen1, Yu-Jui Tseng1, Kuo-Wei Chen1, Zhi-Jie Wu1, Sheng-Yuan Sun1, Po-Wei Chiu1, Hio-Kun Si1, *Ying-Tsang Liu1, Yun-Li Li1 1. PlayNitride Display Co., Ltd. (Taiwan) |
| With the rapid advancement of augmented reality (AR) technology, lightweight and high-brightness display is required. MicroLED technology stands out as a promising solution to meet these needs. However, achieving ultra-high pixel density (PPI), integrating full colors, and reducing chip size to less than 3μm on a CMOS backplane present are significant challenges. | |
| AMD7-2
13:50 |
Invited Development and Challenges of Large Single Module Active Matrix Micro LED Display Junewoo Lee1, *Yangen Wu1, Jenn-jia Su1, Ya-Ling Hsu1, Yueh-Hung Chung1 1. AUO (Taiwan) |
| A 31 inch AM (active matrix)-micro LED (light emitting diode) module was successfully fabricated and tested. This study confirms the feasibility of ultra-large displays with many technical issues such as IR drop, panel stability, repair and tiling processes. Panel evaluation results show large single module AM-micro LEDs on glass substrate could be the standard for future premium displays. | |
| AMD7-3
14:10 |
10T3C Mini-LED Pixel Circuit Based on LTPS TFT With Two VDD to Reduce Power Consumption *Yuan-Yu Lai1, Chung-Tien Chiu1, Chih-I Liu1, Ming-Yang Deng2, Chih-Lung Lin1 1. National Cheng Kung University (Taiwan), 2. AUO Corporation (Taiwan) |
| This work presents a pixel circuit for the mini-LED displays. The proposed circuit compensates for VTH variations and the VDD I-R drops to generate uniform driving currents with the current error rates less than 4.89%. Additionally, this circuit switches the voltage of the power supply line to reduce power consumption. | |
| AMD7-4L
14:30 |
Invited Natural 3D Augmented Reality Head-Up Display with High Dynamic Range Micro-LED Technology *Chiu-Lien Yang1, Hong-Sheng Hsieh1, Chih-Lung Lin1, Yung-Hsun Wu1, Chih-Yung Hsieh1 1. Innolux Corporation (Taiwan) |
| This article introduces an AR HUD (Augmented Reality Head-Up Display) using high dynamic range μLED (Micro-LED) technology for improved image quality. To enhance readability in sunny environments, we employ HDR displays with μLED and MLA (micro-lens array) technology. Additionally, N3D (Natural Three Dimensional) technology is used to create 3D HUD images at various depths, reducing eye movement and enhancing driving safety. |
AMDp1: Active-Matrix Device (1)
Dec. 4 13:20-14:40 Main Hall
| AMDp1-1L | High Performance P-type Tellurium Thin-Film Transistors with Sub-100 nm Channel Length *Sooji Nam1,2, Chihun Sung1, Jung Hoon Han1, Dong Yeob Shin3, Kwun-Bum Chung3, Sung Haeng Cho1 1. Electronics and Telecommunications Research Institute (Korea), 2. University of Science and Technology (Korea), 3. Dongguk University (Korea) |
| We investigate the structural, optical, and electrical properties of sputtered Te films and report the device characteristics of p-type Te TFTs with sub-100 nm channel length using a novel photolithography method. The optimized TFT devices exhibit excellent electrical performance at a low temperature of 150 °C. | |
| AMDp1-2L | UV-Photopatterned High-k Polymer Films for Flexible Electronic Devices *SeongCheol Jang1, Gunoh Lee2, Kyung Jin Lee2, Hyun-Suk Kim1 1. Dongguk University (Korea), 2. Chungnam National University (Korea) |
| A novel high-k Parylene-OH thin film is developed via chemical vapor deposition process, offering flexibility, UV photo-patterning, and high dielectric constant of 7.53. It enables flexible IGZO TFTs and CMOS inverters, promising future applications in advanced flexible electronics. | |
| AMDp1-3L | High-Performance Oxide Transistor Induced by a Metal Capping Layer on the Active Layer: Applications in High-speed Measurement *Ji-Min Park1, Do Hwan Kim2, Hyun-Suk Kim1 1. Dongguk University (Korea), 2. Hanyang University (Korea) |
| This study focuses on enhancing the mobility of top-gate oxide thin-film transistors (TFTs) for ultrahigh-resolution displays. The proposed solution involves metal-capped Zn-Ba-Sn-O (ZBTO) transistors with polymer gate dielectric layer. The resulting device achieves five times higher mobility than the reference, demonstrating potential for high-resolution, large-area, and flexible displays. | |
| AMDp1-4L | A PWM Pixel Circuit with Fast Rising Time by Charge-Sharing Mechanism *Ting-En Wei1, Cheng-Han Ke1, Yi-Chien Chen1, Ming-Yang Deng2, Chih-Lung Lin1 1. National Cheng Kung University (Taiwan), 2. AUO Corporation (Taiwan) |
| This work presents a pixel circuit based on LTPS TFTs and utilizes PWM method to drive micro-LEDs, dramatically reducing rising time to around 4 μs through the charge-sharing mechanism. The VTH variations of TFTs are compensated with the current error rates below 2.53% and emission time shift within 1μs. | |
| AMDp1-5L | Low Voltage Operating Oxide Semiconductor-Based Negative Capacitance Field-Effect Transistors *Jihyeon Min1, Kyong Jae Kim2, You Seung Rim2, Hyun-Suk Kim1 1. Dongguk University (Korea), 2. Sejong University (Korea) |
| In this study, an amorphous oxide semiconductor-based transistor integrated with ferroelectric Hf0.5Zr0.5O2 was investigated. A stacked structure of ferroelectric and high-k dielectric layers was used for low-power operation. As a result, the NCFET achieved a minimum subthreshold swing of 50.84 mV/dec and an ION/OFF ratio exceeding 6 orders of magnitude. | |
| AMDp1-6L | Ultra-Thin Indium Oxide Thin-Film Transistors by Plasma Enhanced Atomic Layer Deposition *Jaewon Park1, Seong Cheol Jang1, Hyun-Suk Kim1 1. Dongguk University (Korea) |
| In this work, Indium oxide channel layer was fabricated by plasma enhanced atomic layer deposition (PEALD) process at a low process temperature of 150 degrees. In order to achieve the ultra-thin In2O3 channel layer, the thickness of Indium oxide channel layers was scaled down. (ranging from 1nm to 5nm). | |
| AMDp1-7L | High-Resolution Mini-LED Matrix Backlight for High Local Dimming Performance *Ramazan Ayasli1, Sascha Xu2, QingYang Liu3, Kan Wang3, XiongPing Li3, Feng Qin3 1. Saarland University (Germany), 2. X-Motive GmbH (Germany), 3. Tianma Microelectronics Co. Ltd. (China) |
| The performance of local dimming significantly depends on the LED resolution of the backlight unit (BLU). This paper shows the results of SSC local dimming algorithm applied to a BLU with 2400 Mini-LEDs on an AM substrate for a 12.3” standard automotive display. High power saving rate and enhanced visual quality are the main tangible results. Halo artifact is substantially mitigated. |
AMDp2: Active-Matrix Device (2)
Dec. 4 15:10-16:30 Main Hall
| AMDp2-1 | Gate Driver Based on LTPS TFTs to Generate Sawtooth-Like Signal Utilizing Source Follower Structure *Chung Tien Chiu1, Sung Chun Chen1, Ming Yang Deng2, Chih-Lung Lin1 1. National Cheng Kung University (Taiwan), 2. AUO Corporation (Taiwan) |
| A novel gate driver circuit that generates a sawtooth-like signal is proposed. This circuit compensates for the VTH variations of the driving transistor, resulting in maximum output voltage deviations of only −0.119 V and +0.118 V in simulation. This circuit also considers the RC loading variation on the display pixels. | |
| AMDp2-2 | Photolithography-Free Fabrication of a-IGZO Thin-Film Transistor Array for Active-Matrix Organic Light-Emitting Diode Displays *Changyun Na1, Changjun No1, Sungkyu Jang1, Hoyeon Yun1, Suyoung Kim1, Mingi Kim1, Yurim Jeong1, Junyeop Lee1, Yun Ah Kim1, Sung Min Cho1 1. Sungkyunkwan University (Korea) |
| An a-IGZO TFT array was successfully fabricated using a self-aligned imprint lithography (SAIL) process. This SAIL process consists of two steps: imprint and plasma etching, with no photolithography required. A three-dimensional structure is created through the imprinting process using UV-curable resin. After that, the pattern is formed by sequentially plasma etching. All 25 TFTs in the TFT array fabricated in this way showed proper switching characteristics. | |
| AMDp2-3 | Bootstrap Inverter Using Dual-Gate IGZO TFTs *Yasutaka Tokimoto1, Muhamad Affiq Bin Misran1, Reiji Hattori1 1. Kyushu University (Japan) |
| The performance of inverters used in gate drivers is a critical factor in achieving high-performance displays. In this study, we fabricated and evaluated three types of inverters using amorphous indium-gallium-zinc-oxide thin-film transistors with a dual-gate structure. A bootstrap inverter with five TFTs showed a maximum output voltage equal to the supply voltage and a short rise time. | |
| AMDp2-4 | Improvement of Amorphous Silicon Thin Film Transistor Photosensitivity for Optical Sensor *Hejing Zhang1, Chunyan Lin1, Junlong Fan1, Zhen Liu1, An-thung Cho1, James Hsu1, Wade Chen1 1. Chongqing HKC Optoelectronics Technology Co., Ltd. (China) |
| Different gate driven a-Si:H TFTs and various gap-gate a-Si:H TFT structures were proposed and measured under different illuminance intensities for optical sensors, processes of which were completely compatible with existing LCD VA-TFT arrays in this paper. The top gate driven TFT showed higher Iphoto/Idark ratio as high as 1.70×107, and the novel gap-gate TFT structure ... | |
| AMDp2-5 | Integration of Ambient Light Sensor in LCD Displays Based on Mass Production Technology *Xiaoxiao Wu1, Hongan Liu1, Juanmei Zeng1, Bingping Liu1, Xuexin Lan1, Xianyan Yang1 1. XiaMen Tianma Microelectronics Co., Ltd. (China) |
| We propose a scheme for integrating ambient light sensor (ALS) in LCD displays. This scheme is developed based on existing mass production processes without increasing the cost of the product, while the performance of the ALS is comparable to that of the current external devices. We have achieved the development of ALS integration on a 6.56'' 326 PPI product, which can achieve a photo sensitivity accuracy ... | |
| AMDp2-6 | Bias Stress Reliability of ALD InGaZnO TFTs With HfOx *Ziheng Bai1, Chunyu Zhang1, Nannan You1, Haitao Zhou1, Jiayi Wang1, Di Geng1 1. Institute of Microelectronics of Chinese Academy of Sciences (China) |
| In this work, the DC bias stress of ALD InGaZnO TFTs is presented (9 nm HfOx + 6 nm IGZO). The Vth shift in NBS up to over-drive gate voltage (Vov) of −4 V is no more than 10 mV. In PBS at Vov ≤ +3 V, the Vth shift is correlated with the power-law formula. When Vov ≤ +3 V (3.3 MV/cm), charge ... | |
| AMDp2-7 | Analysis of Frame Flicker Phenomenon in LCD Display Devices *Tian Lan1, Zeyao Li1, Xirong Han1, Tianhao Zhang1, Jianyu Cui1, Xianfei Zhu1, Minghong Shi1, Wade Chen1 1. Chongqing HKC Optoelectronics Technology Co. Ltd. (China) |
| In this article, we investigate the mechanism of frame flicker phenomenon, and then four solutions were proposed. Through our verification test, we can improve Vgh Margin 5.6V with our competitive GOA design. |
Workshop on FPD Manufacturing, Materials and Components
| Dec. 4 | 13:00-14:20 | Room 107 | FMC1 | LED Display Technology |
| Dec. 4 | 14:50-16:10 | Room 107 | FMC2 | AR/VR Devices |
| Dec. 5 | 9:00-10:20 | Mid-sized Hall B | FMC3/PH3 | Emissive Materials and Components |
| Dec. 5 | 10:50-12:10 | Mid-sized Hall B | FMC4 | Optical Components (1) |
| Dec. 5 | 13:30-14:30 | Mid-sized Hall B | FMC5 | Optical Components (2) |
| Dec. 5 | 17:10-18:10 | Mid-sized Hall B | FMC6 | Device Fabrication Techniques |
| Dec. 6 | 9:00-10:20 | Mid-sized Hall A | AMD5/FMC7 | Oxide TFT Manufacturing Technology |
| Dec. 6 | 10:50-12:10 | Mid-sized Hall B | FMC8 | Display Metrology |
| Dec. 6 | 13:30-14:50 | Mid-sized Hall B | FMC9/OLED7 | OLED Manufacturing Technology |
| Dec. 4 | 17:00-18:20 | Main Hall | FMCp1 | Materials and Components |
| Dec. 5 | 15:40-17:00 | Main Hall | FMCp2 | Manufacturing and Process |
FMC1: LED Display Technology
Special Topic of Interest on Micro/Mini LEDs
Dec. 4 13:00-14:20 Room 107
Chair: Hiroto Sekiguchi (Toyohashi Univ. of Tech.)
Co-Chair: Rie Togashi (Sophia Univ.)
| FMC1-1
13:00 |
Invited InGaN/GaN Nanocolumns Prepared via Nanotemplate Selective-Area Growth for Micro-LED Displays *Rie Togashi1, Kota Hoshino1, Shunsuke Kudo1, Kenya Yoshimura1, Katsumi Kishino1 1. Sophia University (Japan) |
| To achieve high-efficiency red micro-LEDs, InGaN/GaN nanocolumns (NCs) were grown via nanotemplate selective-area growth using sputter-deposited AlN/Si(111) templates. The method enabled the fabrication of uniform ordered InGaN/GaN NCs with a precisely controlled column top shape. The InGaN/GaN NCs emit red light while maintaining high spectral purity and demonstrate an internal quantum efficiency of ∼8%. | |
| FMC1-2
13:20 |
Invited MicroIC Backplanes for MicroLED Displays *Christopher A Bower1, Imre Knausz1, Erich Radauscher1, Clint Meyer1, Carl Prevatte1, Nikhil Jain1, Chris Verreen1, Matthew Meitl1, Amy Wu1,2, Doug Huard1,2, Vishal Sinha2, Kunjal Parikh2 1. X Display Company, Inc. (United States of America), 2. Intel Corporation (United States of America) |
| We present a 140 pixels-per-inch microLED display. The display uses flip-chip microLEDs and a backplane that consists of microdriver microICs. The microIC is less than ten microns thick, and each microIC controls an array of sixteen pixels. The microIC backplane offers battery life improvements by efficiently driving the microLEDs with sub-microsecond pulse width modulation. | |
| FMC1-3
13:40 |
Invited Manufacturing of Wide-Color-Gamut MicroLED Displays by UV Pumped R/G/B Quantum Dots *Mingwei Zhu1, Hou T Ng1, Sivapackia Ganapathiappan1, Zhiyong Li1, Nag Patibandla1 1. Applied Materials, Inc. (United States of America) |
| Applied Materials Inc. has developed a disruptive microLED display technology and manufacturing solution based on UV-A microLEDs and Cd-free R/G/B quantum dots (QDs). Using such full-color conversion technology, we expect our display would have higher pixel yield, higher color uniformity, simplified backplane, higher efficiency than other microLED fabrication approaches. | |
| FMC1-4
14:00 |
Invited Intermediate Carrier for MicroLED Transfer Process *Kuan-Ting Kuo1, Ya-Huei Chang1, Sean Garner1 1. Corning Incorporated (United States of America) |
| Corning HS6.3 glass wafer has shown compatible performances with sapphire substrate as the intermediate carrier in the microLED chip transfer process. Though the warp increased after chip transfer on glass carrier, it went down after tether structure fabrication, demonstratingcomparable pick-up yields as it is on sapphire. |
FMC2: AR/VR Devices
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 4 14:50-16:10 Room 107
Chair: Takao Tomono (Keio Univ.)
Co-Chair: Toshiyuki Endo (Nissan Chem.)
| FMC2-1
14:50 |
Invited Advanced Technologies for Polymer Waveguide *Satoshi Shiraga1 1. Cellid, Inc. (Japan) |
| We have successfully developed super lightweight polymer waveguide. It can display full color with 3.0g weight for monocular, 1.0mm thickness, FOV 50 degrees at maximum and MTF equivalent to glass waveguides. Our in-house built simulation tool can manage optimization of various DOE and layouts including resin and coating that is beyond capability market-available calculators. Lightweight and clear images will deliver more immersive experiences for users. | |
| FMC2-2
15:10 |
Invited Optical Polymer Wafers for AR Glasses *Eiichiro Hikosaka1, Akihiro Muramatsu1, Kenji Iida 1 1. Mitsui Chemicals, Inc. (Japan) |
| We have developed new optical grade polymer wafers to contribute the next generation AR glasses. Glass wafers, which are commonly used for conventional AR glasses, have disadvantages in heavy weight and safety issues. Meanwhile, the polymer wafers have good optical characteristics such as high refractive index and excellent mechanical properties such as light weight and shock robustness. | |
| FMC2-3
15:30 |
Developing of Volume Holographic Photopolymer for Light-Coupling in Waveguide Display *Masanori Hosoyamada1, Yoshiaki Asanoi1, Akinori Izaki1, Nan Hu2, Sergey Simavoryan2, Hongxi Zhang2, Peng Wang2 1. Nitto Denko Corporation (Japan), 2. Nitto Denko Technical Corporation (United States of America) |
| In this report, we will present our-developing of holographic photopolymer for waveguide display device. We will introduce the material design of volume holographic photopolymer and the property. Finally, we will present the demonstration as waveguide display with the photopolymer. | |
| FMC2-4L
15:50 |
Invited Harnessing AI for Liquid Crystal Materials Innovation and Advanced Optical Components in AR/VR/MR Headsets *Lu Lu1 1. Meta Platforms, Inc. (United States of America) |
| The development of advanced optical components for AR/VR/MR headsets is crucial for high-quality visual experiences. Liquid crystal materials have shown great potential due to their unique properties. Using AI shows promising results in accelerating the innovation and development of liquid crystal materials and advanced optical components for AR/VR/MR headsets. |
FMC3/PH3: Emissive Materials and Components
Special Topic of Interest on Quantum Dot Technologies
Dec. 5 9:00-10:20 Mid-sized Hall B
Chair: Genichi Motomura (NHK)
Co-Chair: Tsuneo Kusunoki (Oxide)
| FMC3/PH3-1
9:00 |
Invited Synthesis and Tunable Optical Properties of Ag-In-Ga-S Quantum Dots for LED Applications *Tsukasa Torimoto1, Makoto Tozawa1, Kazutaka Akiyoshi1, Tatsuya Kameyama1, Genichi Motomura2, Taro Uematsu3, Susumu Kuwabata3 1. Nagoya University (Japan), 2. Japan Broadcasting Corporation (Japan), 3. Osaka University (Japan) |
| Quantum dots (QDs) composed of Ag-In-Ga-S solid solution had a tunable energy gap (Eg) that increased with an increase in the Ga/In ratio. These QDs exhibited a sharp band-edge photoluminescence peak by GaSx shell coating. Light-emitting diodes fabricated with these QDs exhibited a bright electroluminescence peak, with the color tunable from yellow to green to blue by varying ... | |
| FMC3/PH3-2
9:20 |
Highly Efficient Organic-Based Photoluminescent Dye for Color Conversion Display Applications *Sadahiro Nakanishi1, Hiroaki Ueno1, Toru Umemoto1, Jie Cai2, Jeffery Hammaker2, Tissa Sajoto2, Luis Vellegas2, Shijun Zheng2 1. Nitto Denko Corporation (Japan), 2. Nitto Denko Technical Corporation (United States of America) |
| This paper reports the highly efficient and high color purity red and green organic-based photoluminescent materials for mini-LED backlight films and in-pixel color converters. The advantages of high optical density achieved by our organic-based color converter will be presented. | |
| FMC3/PH3-3
9:40 |
Quantum Dot Color Conversion Films with High Contents of Quantum Dots by Ligand Modification and Dispersants *Yonghyeok Choi1, Kangwoo Lee1, Mina Kim1, Jinchul Park1, Heeyeop Chae1 1. Sungkyunkwan University (Korea) |
| InP Quantum dot color conversion films containing up to 50wt% of QDs were developed and investigated for effective color conversion in this work. QD surface was modified to acrylate-terminated ligands and dispersant was blended in the siloxane polymer matrix. Up to 64% of color conversion efficiency was demonstrated and blue leakage was reduced by 44% compared to 20wt% QD containing films. | |
| FMC3/PH3-4
10:00 |
Photolithographic Quantum Dot Patterning Using Plasma-Induced Ligand Polymerization and Photoresist Mask *Mina Kim1, Boram Kim1, Yonghyeok Choi1, Jinchul Park1, Heeyeop Chae1 1. Sungkyunkwan University (Korea) |
| Microscale patterning of quantum dot (QD) was achieved with plasma-induced ligand polymerization and plasma sputter etching using a photoresist (PR) masking layer in this work. The ligands of QDs were cross-linked with Ar plasma and unprotected QD layer were etched through a subsequent plasma sputter etching processes. The cross-linked QD layer was patterned in 3 μm scale. |
FMC4: Optical Components (1)
Dec. 5 10:50-12:10 Mid-sized Hall B
Chair: Rumiko Yamaguchi (Akita Univ.)
Co-Chair: Kazuhiro Osato (Zeon)
| FMC4-1
10:50 |
Novel Film Technology Compatible With Large-Sized Reflective Displays *Jumpei Kuno1, Koichi Inoue1, Yufeng Weng1, Kozo Nakamura1, Minoru Miyatake1 1. Nitto Denko Corporation (Japan) |
| We have developed a novel front light unit (FLU) composed of a transparent plate and light guide film possessing internal air-cavities. The advantages of our FLU are supported by simulational studies and prototypes. Moreover, this work is the first example of a large-sized FLU with the length of 1600 mm. | |
| FMC4-2
11:10 |
Color Change With Structural Deformation of Metal Semi-Shell Structure *Narumi Asato1, Masaaki Magari1,3, Ryushi Fujimura1,2 1. Utsunomiya University (Japan), 2. University of Tokyo (Japan), 3. HORIBA STEC, Co., Ltd. (Japan) |
| Ag semi-shell structures are capable of localized melting deformation (photothermal deformation) of the structure by laser irradiation. We observed photothermal deformation and structure-dependent spectral changes in Ag-SiO2 semi-shell structures and controlled the changes by light intensity. The results show that the semi-shell structure can change its coloration by photothermal deformation. | |
| FMC4-3
11:30 |
Visual Complementation of Slanted Gap by Use of Multiple Retro-Reflectors by Binocular Viewing *Takeru Nishiyama1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan) |
| Extra-large aerial display is useful for public signage and is composed of tiled optical components. This work investigates the acceptable width of the slanted gap for tiled retro-reflectors in a large AIRR setup. Since binocular complementation occurs only for the horizontal component of gap, acceptable width depends on the gap angle and it's decreased as angle is away from the vertical. | |
| FMC4-4L
11:50 |
Enhancing Adaptive Driving Beam Headlight Systems with Multilayer Optical Films for Glare Reduction *Kazuhiko Toyooka1, Kazuhiko Minami2, Noboru Iwata 1. 3M Japan Products Limited (Japan), 2. 3M Japan Innovation Limited (Japan) |
| The polarized headlight proposed by the authors aims to develop an efficient headlight system using Multilayer Optical Film (MOF) to produce polarized light. This innovation seeks to reduce road surface reflection glare, thereby enhancing visibility for drivers and Advanced Driver Assistance Systems (ADAS). |
FMC5: Optical Components (2)
Dec. 5 13:30-14:30 Mid-sized Hall B
Chair: Daisuke Ogomi (Nitto Denko)
Co-Chair: Shuhei Namekawa (Nippon Steel Chem. & Material)
| FMC5-1
13:30 |
Smoke Anti-Reflection Films Achieving High Ambient Contrast Ratio and Low Power Consumption *Atsuto Hashimoto1, Masanobu Isshiki1, Kazuya Takemoto1, Takashi Tachikawa1 1. AGC Inc. (Japan) |
| Suppressing reflection of ambient light is a critical factor for displays used under strong light. Smoke-AR films were proposed to suppress the reflection not only on top surface but also inside the display panels. The smoke-AR film can increase ambient contrast ratio and reduce backlight power consumption simultaneously compared to the conventional clear AR film. | |
| FMC5-2
13:50 |
Increasing Viewing Angle for Compact Aerial Display by Changing Width of Striped Retro-Reflector *Daichi Tasaki1, Akinori Tsuji2, Toyotaro Tokimoto1,3, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan), 2. Tokushima University (Japan), 3. XAiX, LLC (Japan) |
| The compact aerial display by use of striped retro-reflector reduces the undesired depth space, but it limits the viewing angle. For increasing the viewing angle, we clarify that the width of the striped retro-reflector should be increased, because there is a proportional relationship between the width of retro-reflector and the viewing angle. | |
| FMC5-3
14:10 |
High-Resolution Aerial Imaging Without Aberration Using a Lens to Reduce Diffraction and Ray Shift by a Retro-Reflector *Kazuaki Takiyama1,2, Toru Iwane1, Shiro Suyama1, Kenichiro Masaoka3,4, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan), 2. JSPS Research Fellowship (Japan), 3. NHK Foundation (Japan), 4. NHK Science & Technology Research Laboratories (Japan) |
| High-resolution aerial imaging without aberration has been realized by use of a lens and retro-reflection. The lens in our proposed aerial imaging by retro-reflection (AIRR) optical system reduces image blurring caused by diffraction, ray shift, and scattering from the retro-reflector. The modulation transfer function (MTF) of the proposed system with a 441 PPI light source display achieves 42% at the Nyquist frequency. |
FMC6: Device Fabrication Techniques
Dec. 5 17:10-18:10 Mid-sized Hall B
Chair: Takao Tomono (Keio Univ.)
Co-Chair: Tauto Nakanishi (JNC)
| FMC6-1L
17:10 |
High-Precision Mass Transfer Technology for Transparent Flexible Micro-LED Displays *Kengo Shima1, Tatsuya Ishida1,2, Koichi Kajiyama2, Yasuyuki Shirai2, Takahiro Ishinabe2 1. Tokai Rika Co., Ltd. (Japan), 2. Tohoku University (Japan) |
| We have developed a high-precision mass transfer technology for micro-LED displays utilizing self-alignment with wall structures. By optimizing the spacer design, we achieved high-precision mounting of μLEDs and Micro-ICs without relying on equipment accuracy. This technology facilitates the creation of transparent flexible displays without requiring TFTs, offering high-brightness and high-reliability, particularly for automotive applications. | |
| FMC6-2L
17:30 |
High Performance Amorphous-IGZTO Thin-Film Transistors with Short Channel Length through Beneficial Coupling Effects of Metal-H Bonding *Gwang-Bok Kim1, Jae Kyeong Jeong1 1. Hanyang University (Korea) |
| This study demonstrates the beneficial effects of Sn-induced metal-H (M-H) bonding in amorphous In-Ga-Zn-Sn-O (a-IGZTO) thin-film transistors (TFTs) with short channel lengths. The a-IGZTO TFTs showed excellent performances with a high field-effect mobility of 76.9 cm2/Vs, a sharp subthreshold swing of 128 mV/dec, and a threshold voltage of 0.1 V. Additionally, these devices showed remarkable stability. | |
| FMC6-3L
17:50 |
Bayesian Optimization-Driven Improvement of Thermoelectric Properties of Polycrystalline III-V Semiconductor Films Synthesized at Low Temperature *Takamitsu Ishiyama1,2, Koki Nozawa1, Takashi Suemasu1, Kaoru Toko1 1. University of Tsukuba (Japan), 2. JSPS Research Fellow (Japan) |
| We utilized Bayesian optimization to improve the thermoelectric performance of Sn-doped InGaAsSb thin films. We obtained a figure of merit ZT = 0.033, which represent a 2.5-fold improvement compared to random initial experimental results. Additionally, the optimal process temperature used for synthesizing the film was suitable for deployment on a flexible substrate. |
AMD5/FMC7: Oxide TFT Manufacturing Technology
Dec. 6 9:00-10:20 Mid-sized Hall A
Chair: Susumu Horita (JAIST)
Co-Chair: Hirohiko Nishiki (Mitsui Kinzoku)
| AMD5/FMC7-1
9:00 |
Invited Fluorination Technology for Reliable Metal-Oxide Thin-Film Transistors Man Wong1, *Wei Jiang1 1. The Hong Kong University of Science and Technology (China) |
| Plasma-based fluorination has been reported to enhance the performance of metal-oxide thin-film transistors. The effectiveness of fluorination can be improved by conducting a pre-fluorination non-oxidizing anneal. It is also affected by process conditions including fluorination temperature, as well as post-fluorination air exposure and drive-in. | |
| AMD5/FMC7-2
9:20 |
Effects of Sequential Anneals in Sealed and Oxidizing Ambiences on Oxide Thin-Film Transistors *Jingyu Fan1, Jianming Zhu1, Xiao Li1, Zhendong Jiang1, Yunping Wang1, Dan Yang1, Zeyu Cai1, Shengdong Zhang1, Lei Lu1 1. Peking University (China) |
| The PBTS stability of the IGZO EMMO TFT has been improved from by sequential annealed after the channel was sealed by the impermeable metal layer. Furthermore, the shifted Vth of the TFT sequential annealed is −1 V, suffering post N2 anneals, while the shifted Vth of O2 post annealed TFT is about −15 V. | |
| AMD5/FMC7-3
9:40 |
Top-Gate IGZO TFT With Dry Etching Process for High-Resolution Display Application *Zhang Chunyu1,2, Chen Chuanke1,2 1. IMECAS (China), 2. University of Chinese Academy of Sciences (China) |
| In this study, we fabricated IGZO TFTs that IGZO film was patterned by a Cl-based dry etching process. The transfer characteristics of the device are analyzed. The fabricated IGZO TFT shows SS of 81.26 mV/Dec, mobility of 17.02 cm2/Vs and Vth of −1V. The reliability performance of NBS at −5V bias for 3600 seconds were also studied. These results ... | |
| AMD5/FMC7-4L
10:00 |
Highly Reliable Hydrogen-Free Top-Gate Oxide TFT ∼ Hydrogen-Free ICP-CVD SiO2 and SiNx films for TFTs ∼ *Mamoru Furuta1, Mir Mutakabbir Alom1, Motoki Ando1, Yoshihiro Sato2, Takafumi Kambe2, Tsutomu Satoyoshi2 1. Kochi University of Technology (Japan), 2. Tokyo Electron Technology Solutions Ltd (Japan) |
| In this presentation, hydrogen-free SiO2 and SiNx films were successfully deposited by large-area inductively coupled plasma chemical vapor deposition (ICP-CVD) using hydrogen-free source gases. The self-aligned top-gate hydrogen-free In-Ga-Zn-Sn-O (IGZTO) TFT is demonstrated toward highly reliable oxide TFTs. |
FMC8: Display Metrology
Dec. 6 10:50-12:10 Mid-sized Hall B
Chair: Kalil Käläntär (Global Optical Solutions)
Co-Chair: Johan Bergquist (Consultant)
| FMC8-1
10:50 |
Invited Analyzing and Elevating Diffractive Waveguide Optics for a Better AR Experience *Juha Pietarinen1, Joonas Pylväinen1 1. Optofidelity Oy (Finland) |
| This session investigates Diffractive Waveguides for AR smart glasses, focusing on factors affecting optical image quality and user experience. It emphasizes manufacturing precision and quality control to optimize processes and reduce production errors. These efforts enable high performance of Diffractive Waveguide displays, ensuring superior visual experiences in augmented reality. | |
| FMC8-2
11:10 |
Invited Measuring XR Latency *Tommi Björk1 1. Optofidelity Oy (Finland) |
| This presentation delves into the critical issue of measuring latency in extended reality (XR) content, focusing on the methods used to detect pose changes from the content, sources of error, and strategies to mitigate misalignments between opposing systems. We'll explore the implementation of time warping, also known as motion prediction, and its impact on the viewer's experience. | |
| FMC8-3
11:30 |
Quantifying On-Axis and Off-Axis Metrology for Planar and Non-Planar Displays *K Käläntär1,2, Elgün Tağiyev2 1. Global Optical Solutions (Japan), 2. Nakhchivan State University (Azerbaijan) |
| This paper extends research on quantifying luminance measurement field contours on planar and curved displays, focusing on cylindrical, spherical, and conical shapes. It assesses theoretical on- and off-axis contours, discusses measurement error consequences, and explores strategies to manage these errors in practical luminance measurements. | |
| FMC8-4
11:50 |
Inclined Screen Observation to Measure Aquatic Image Position in Aquatic Display With AIRR *Ryosuke Ichikawa1, Hiroki Takatsuka1, Toru Iwane1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan) |
| We propose a novel method to measure the imaging position of aquatic display with aerial imaging by retro-reflection (AIRR). We observe scattering on an inclined screen in water through a polarizer. Our method can show the behavior of light before and after it is focused in water. The aquatic image position can be quantitatively obtained from the captured image of the scattering on the screen. |
FMC9/OLED7: OLED Manufacturing Technology
Dec. 6 13:30-14:50 Mid-sized Hall B
Chair: Tauto Nakanishi (JNC)
Co-Chair: Takahiro Komatsu (Canon)
| FMC9/OLED7-1
13:30 |
Invited Printed Light Film Manufactured via Roll-to-Roll Flexography *Whitney Gaynor1, George Burkhard1, Bang-Yan Liu1, Kyra Kurtz1, Michael Crump1, Brian Johns1, Eli Wolf1 1. Sinovia Technologies (United States of America) |
| Sinovia is using flexographic printing, a high-throughput roll-to-roll method used for packaging and paper products, to create bottom-emitting OLEDs roll-to-roll from start to finish, including patterning and encapsulation. This is enabled by our proprietary roll-to-roll printed transparent conductive film. Both challenges and opportunities arise when adapting traditional printing techniques to electronic applications. | |
| FMC9/OLED7-2
13:50 |
Invited Solution-Processed Ultra-High Barrier Film for Organic Electronics Through Vacuum UV Irradiation *He Sun1, Luyang Song1, Yoshiyuki Suzuri1 1. Yamagata University (Japan) |
| Our research demonstrates that solution-processed SiNx barrier films, optimized with PHPS and PDMS layers and enhanced by VUV irradiation, can rapidly achieve ultrahigh barrier performance of up to 1.6 x 10-5 g m-2 day-1, making them suitable for industrial production of advanced organic electronic devices. | |
| FMC9/OLED7-3
14:10 |
Photo-Patternable High Refractive Index Materials for Enhanced Light Extraction in Organic Light-Emitting Diodes *Yuki Takada1, Kang-Go Chung1, Kaori Shirato1, Kyosuke Yoda1, Yoshinori Kinoshita1, Yoshikazu Miyamoto1 1. JSR corporation (Japan) |
| Enhancing light extraction in organic light-emitting diodes (OLEDs) remains a significant opportunity for advancement, with one method being the introduction of high and low refractive index layers. This paper presents our advancements in photo-patternable HRI materials, which enable the fabrication of diverse pattern shapes under process conditions compatible with commercial manufacturing lines. | |
| FMC9/OLED7-4L
14:30 |
Anti-Sparkle Film Application for Display *Fumihisa Hanzawa1, S Matt Menke2, Mark Lu3, Sotaro Endo1 1. 3M Japan Innovation (Japan), 2. 3M Company (United States of America), 3. 3M Taiwan (Taiwan) |
| Display technology for Laptop/Tablet is shifting to OLED from LCD which has higher resolution and smaller pixel sizes. In this case, potential of sparkle issue as interference to AG surface, has been increased and become more acute problem. Anti-Sparkle Film (ASF) solution is proposed to reduce it with minimal impact to the image quality. |
FMCp1: Materials and Components
Dec. 4 17:00-18:20 Main Hall
| FMCp1-1 | Polymer Color Conversion Materials for Display Panels *Shohgo Yamauchi1, Kenji Kohiro1, Takahiro Sato1, Shuhei Akahori1, Mayu Yoshioka1, Yoshiaki Tsubata1 1. Sumitomo Chemical Co., Ltd. (Japan) |
| We propose a polymer color conversion material (PCCM) based on polymer OLED material technology. The high optical density of PCCM enables its film to absorb over 99% of blue excitation light with a film thickness of 500 nm, which is less than one-tenth the thickness of quantum dots color conversion films. Sufficient optical properties and photoluminescence stability for practical use in display applications have been demonstrated. | |
| FMCp1-2 | Thermo-Responsive Smart Glass Based on an Eeco-Friendly Aqueous Solution Tsun-Han Wang1, *Shie-Chang Jeng1 1. National Yang Ming Chiao Tung University (Taiwan) |
| A smart glass, based on an eco-friendly aqueous solution, capable of controlling both transparency for privacy and the radiant energy flow for thermal insulation, is demonstrated. Good thermo-responsive optical properties are achieved with ∼ 77% luminous transmittance, ∼90% haze and ∼64% solar regulation. | |
| FMCp1-3 | High-UV-Transmittable Black Pigment for Advanced Black Resist Processing *Hiroto Akaike1, Naoyuki Aiba2, Shozo Komiyama2, Kensuke Kageyama2 1. Mitsubishi Materials Corporation (Japan), 2. Mitsubishi Materials Electronic Chemicals Co.,Ltd (Japan) |
| We have developed a novel high-UV-transmittable black pigment called NITRBLACK UB-2 for primarily black resist processing. A black resist film containing this black pigment can be easily cured by UV light compared with those containing other pigments such as carbon black, thereby facilitating the formation of fine patterned films in photolithographic processes. | |
| FMCp1-4 | 3D Micro-Lens Printing of Quantum Dot/Siloxane Hybrid Encapsulant for Full-Color Micro-LED Display With High Efficiency and Stability *Somin Park1, Yongmin Shin1, Byung Jo Um1, Byeong-Soo Bae1 1. Korea Advanced Institute of Science and Technology (Korea) |
| We report on the three-dimensional (3D) micro-lens shape of a Quantum dot (QD)/siloxane hybrid encapsulant for full-color micro light-emitting diode (μLED) displays. The QD/siloxane hybrid encapsulant is printed in a dome shape at the microscale. Fabricated QD-based color filter array exhibits outstanding optical performance and environmental stability. | |
| FMCp1-5 | Vertical Surface Emitting InGaN Nanorod Laser Pixels For AR Display Application *Sung-Un Kim1, Dae-Young Um1, Jeong-Kyun Oh1, Vignesh Veeramuthu1, Yong-Ho Kim1, Min-Seok Lee1, Yong-Ho Kim1, Min-Seok Lee1, Cheul-Ro Lee1, Yong-Ho Ra1 1. Jeonbuk National University (Korea) |
| We designed an InGaN tunnel-junction layer integrated into a photonic crystal nanorod structure and synthesized a highly uniform InGaN tunnel-junction layer within the nanorod structure using PA-MBE system. We successfully fabricated p-contact free 5 μm scaled tunnel-junction lasing device, operating at low threshold voltage of 2.5 V. EL measurements revealed a lasing spectrum centered at 502 nm with a FWHM of approximately 1 nm at a current density of 1.5 ... | |
| FMCp1-6 | Improvement of Optical Design on Inclined Curved Corner-Cube Retroreflector (D-CCR) for Directional Projection Screen Under Sunny and Automobile's Conditions Ren Mitsuhashi1, *Kazuhiro Wako1 1. National Institute of Technology, Sendai College (Japan) |
| Highly directional projection screens for automobiles with high luminance that can be viewed under sunlight are required. In order to improve the light utilization efficiency of the micro-optical structure that is constituted our previously reported projection screen, we analyzed the reflected light distribution characteristics of the new design proposal. As a result, an optical design that significantly improves light utilization efficiency is established. | |
| FMCp1-7 | Laser-Assisted Patterning of Single Crystal Perovskite Arrays for Color-Conversion Displays Zeyue Xie1, Zhipeng Feng1, Fanghao Ye1, Fion Sze Yan Yeung2, *Guijun LI1 1. Shenzhen University (China), 2. The Hong Kong University of Science and Technology (Hong Kong) |
| We use laser to assist the growth of single crystal perovskite array. The space-limited inverse temperature crystallization method is utilized to growth the single crystal perovskite in the hydrophilic region. Through this method, the MAPbBr3 single-crystal arrays with precise location and uniform size are effectively fabricated, which provides a reference for subsequent research of perovskite single-crystal arrays for color-conversion display. | |
| FMCp1-8 | Two-Dimensional Photonic Crystals Based Surface Relief Gratings for RGB Application *Fathur Rahman Alhadi1, Fu-Li Hsiao1, Ying-Pin Tsai1 1. National Changhua University of Education (Taiwan) |
| This paper presents a new 2D surface relief grating (SRG) designed for precise color rendering in head-mounted displays (HMD) using red, green, and blue (RGB) light systems. The SRG features slanted glass pillars arranged periodically on a glass waveguide surface. Optimization of lattice constants is achieved for each RGB wavelength using finite element method simulations. | |
| FMCp1-9 | Metalens Based on Surface Relief Grating Type Photonic Crystal *Chuan-Yu Chang1, Ying-Pin Tsai1, Fu-Li Hsiao1, Bor-Shyh Lin2 1. National Changhua University of Education (Taiwan), 2. National Yang Ming Chiao Tung University (Taiwan) |
| This study employs Finite Element Method (FEM) to model complex photonic crystal structures, focusing on diffraction efficiency. With periodic boundary conditions, the research optimizes silicon cylinder tilt angles and periodic lengths for improved diffraction and transmission performance. | |
| FMCp1-10 | Transmittance Loss During Remanufacturing of Surface Relief Gratings *Hong Lin Yang1, Ying-Pin Tsai1, Fu-Li Hsiao1 1. Taiwan National Changhua University of Education (Taiwan) |
| This experiment simulates crystal growth by altering growth morphology to observe how photonic crystals taper from the bottom up, resulting in decreased transmittance.By analyzing and comparing different growth angles and structures, the research aims to understand the mechanisms affecting the optical properties of photonic crystals during growth. | |
| FMCp1-11 | Removing Ghost Images in Eye-Matching Spatial Blending Aerial Display With Polarization Modulation *Kohei Kishinami1, Kazuaki Takiyama1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan) |
| We propose a method of removing ghost images within the viewing area in a spatial blending optical system with an aerial display. The proposed method utilizes aerial imaging by retro-reflection with polarization (p-AIRR), where retro-reflectors are tilted at 43-degree and given a curvature of 0.003 to remove ghost images. | |
| FMCp1-12 | Size Measuring Method of Underwater Object by Use of Floating Aquatic Scale Formed With AIRR *Azu Murakami1, Ryosuke Ichikawa1, Hiroki Takatsuka1, Toru Iwane1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan) |
| We propose a novel measuring method of size of an underwater object. Our method uses a floating aquatic scale formed with aerial imaging by retro-reflection (AIRR). AIRR forms the underwater image of a light-source LED light tape. The formed image is used for measuring the size of the underwater object. Our method allows in-situ measurements without stressing the aquatic organisms. | |
| FMCp1-13 | Aberration of Aquatic Display by Use of Dual Lens Arrays *Arisa Sekine1, Ryosuke Ichikawa1, Hiroki Takatsuka1, Toru Iwane1, Shiro Suyama1, Masaru Ishikawa2, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan), 2. LIGHT & IMAGE (Japan) |
| An aquatic image, which is floating in water, is formed by use of two-layered lens arrays. To investigate aberration due to refraction, we visually compared the aquatic images formed by a conjugate optical system and a non-conjugate optical system. Results show that the aberrations are canceled out by the optical system in which the medium on both sides of the lens arrays is conjugate. | |
| FMCp1-14 | Point Spread Measurement of Plane-Symmetric Real-Image-Forming Optics for Aerial Display *Takumi Watanabe1, Kazuaki Takiyama1, Toru Iwane1, Shiro Suyama1, Marii Nishikawa1,2,3, Hayato Kikuta1,2,4, Kenichiro Naka2,5, Shinichi Uehara2,6, Hirotsugu Yamamoto1,2 1. Utsunomiya University (Japan), 2. Japan Electronics and Information Technology Industries Association (Japan), 3. Dai Nippon Printing Co. (Japan), 4. Mitsubishi Electric Corp. (Japan), 5. Nippon Carbide Industries (Japan), 6. AGC Inc. (Japan) |
| Point spread function (PSF) of an aerial display optical system has been quantified from a 2D luminance distribution of the aerial image of a circular aperture that is illuminated by integral sphere with an incoherent white light source. Experimental results obtained by use of different types of optical systems show that 4 times standard deviation (D4σ) shows the anisotropy of the PSF. | |
| FMCp1-15 | Expanded Vertical Viewing Zone in Edge-based Depth-fused 3D Display With Aerial Image and Its Edge Image Floating by Arc 3D Display *Kyoya Hino1, Kensuke Tamano1, Kazuaki Takiyama1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya Univercity (Japan) |
| Aerial depth-fused 3D (DFD) display which combining aerial images by aerial imaging by retro-reflection (AIRR) and floating edge images by an Arc 3D display can expand the vertical viewing zone even when the front and rear images are not vertically overlapped. The proposed DFD display can extend the vertical viewing angle by up to ±3 degrees. | |
| FMCp1-16 | Aerial Imaging by Retro-Reflection (AIRR) Optical System Composed of Surface-Reflective Optical Components *Sotaro Kaneko1, Kohei Kishinami1, Kazuaki Takiyama1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan) |
| We propose the configuration of multimodal aerial imaging by retro-reflection (AIRR) optical system that is composed of surface-reflective optical components. Surface reflective components of punching metal and retro-reflector can converge light with variable wavelengths to the aerial image position, which enables a multimodal aerial display. | |
| FMCp1-17L | The Effect of Azimuth Angle on Photonic Crystal SRG Structure *Lichaun Yu1, Fu-Li Hsiao1, Ying-Pin Tsai1, Bor-Shyh Lin2 1. National Changhua University of Education (Taiwan), 2. National Yang Ming Chiao Tung University (Taiwan) |
| Head-mounted displays (HMDs) are crucial for immersiveVR experiences. This study improves HMD performance byoptimizing Surface-relief Gratings (SRGs) in Lightwave guidesystems, enhancing diffraction efficiency and transmittance. | |
| FMCp1-18L | Energy-Saving Broadband Infrared Halide Perovskite for Application in Light-Emitting Diodes Kuan-Yi Lee1, Hsiu-Kai Yang1, *Mu-Huai Fang1 1. Academia Sinica (Taiwan) |
| We propose an effective and energy-saving ball-mill strategy to synthesize the Cs2AgIn1−xCrxCl6 NIR-SWIR luminescent materials without sintering, which emit the light ranging from 850 to 1350 nm and cover the gap between NIR and SWIR. Finally, we used coffee beans to simulate the temperature changes after pc-LED irradiation. | |
| FMCp1-19L | Integrating Plasmonic Nanoparticles with GaN Nanowires for Enhancing Photodetection *Shuo Han1, Jeong-Kyun Oh1, Dae-Young Um1, Bagavath Chandran1, Yong-Ho Kim1, Sang-Wook Lee1, Jae-Hong Ju1, Jin-Seo Park1, Yong-Ho Ra1 1. Jeonbuk National University (Korea) |
| This study focuses on enhancing the UV photodetectors performance by leveraging the localized surface plasmon resonance effect of AgAu alloy nanoparticles integrated with GaN nanowires. The LSPR effect arises from the collective oscillation of surface electrons in plasmonic nanoparticles upon excitation by incident photons. This effect not only boosts plasmon absorption but also enhances the injection of hot electrons into the conduction band of GaN ... | |
| FMCp1-20L | Order Parameter of Hydrogen-Bonded Liquid Crystal Mixtures with Fluorinated Benzoic Acids *Koki Sawataishi1, Dan Jian, Rumiko Yamaguchi1 1. Akita University (Japan) |
| Nematic-isotropic phase transition temperature (TC) and order parameter (S) of hydrogen-bonded liquid crystal (HBLC) mixtures with some fluorinated benzoic acids (FBAs) have been investigated. TC and S decrease with FBA concentration and the variations depend on the fluorine position of the phenyl ring in FBA molecules. |
FMCp2: Manufacturing and Process
Dec. 5 15:40-17:00 Main Hall
| FMCp2-1 | A Metal for Making Different Cu Taper in Etching Fluid *Hui Wang1, Kang Long1, Zhihui Song1, HuiHua Liao1, Huang I. Chen1, James Hsu1, Wade Chen1 1. Changsha HKC Optoelectronics Technology Co.,Ltd (China) |
| In this paper, the method of producing different taper in the same etching solution of two layers of metal in the copper process of TFT-LCD is reported. | |
| FMCp2-2 | Electrical Properties of ZTO Thin-Film Transistor Coated with Air Spray Printing for Active Layer Formation *Young Jik Lee1, Yong-Jae Kim1, Woon-Seop Choi1 1. Hoseo University (Korea) |
| ZTO is a suitable material for oxide semiconductor TFTs. Air spray technology reduces waste because it uses only the solution needed to form a thin film, and has the advantages of low cost, high throughput, and mass production potential. Compared with spin coating, ZTO TFTs fabricated by air spraying showed much better performance than spin coated ZTO TFT. | |
| FMCp2-3 | ITO Film Detection and Improvement for Liquid *Longjin Zhou1, Sudi Rao1, Chengyi Huang1, James Hsu1, Wade Chen1 1. Changsha HKC Optoelectronics Technology Co. (China) |
| In this paper, the quality of ITO films under different process conditions was evaluated from different angles.ITO film was excited at high temperature, soaked in the stripping solution, and hardness test was carried out.The variation law of film quality was summarized from the influence of different process conditions and the roughness of the bottom film, and the feasibility of hardness as a test ... | |
| FMCp2-4 | Analysis of Peeling Test Capability With Different RA Condition in Narrow Border LCD *Xianfei Zhu1, Zeyao Li1, Xiaowu Sun1, Tian Lan1, Jianyu Cui1, Xirong Han1, Tianhao Zhang1, Minghong Shi1, Wade Chen1 1. Chongqing HKC Optoelectronics Technology Co. Ltd. (China) |
| This paper addresses the issue of poor peeling test capability in narrow TFT-LCD display products. By conducting three different RA experimental conditions and observing the cross-section of the peeling test, a systematic analysis of the strong and weak interfaces of the peeling test is performed. This establishes a mapping relationship between the strong and weak interfaces of the peeling test and providing theoretical support for ... | |
| FMCp2-5 | Research on Profile of Al/Mo Electrode *Jinsong Lu1, Dengli Yao1, Song Sun1, Qin Xiong1, Ranlong Wang1, Kaijun Liu1, Jinn Hong1, James Hsu1, Wade Chen1 1. Chongqing HKC Optoelectronics Technology Co., Ltd. (China) |
| Al/Mo structural metals are used as gate electrodes for TFTs, and clarifying the influence of process parameters on the metal profile angle and its Impedance is crucial for product design and production. In this paper, the effects of the film layer structure, photolithography process, and wet etching process on the metal profile angle and Impedance are investigated. | |
| FMCp2-6 | Fabrication of Shape-Controllable Nanostructures Using Laser Interference Lithography *EunJeong Bae1,2, Geun Su Choi1,2, Tae Jeong Hwang2, Young Hwan Yu2, Byeong-Kwon Ju1, Young Wook Park2 1. University of Korea (Korea), 2. University of Sunmoon (Korea) |
| A periodic nanostructure of various shapes was fabricated by laser interference lithography. The nanostructure can be easily fabricated through a low-power continuous-wave laser. Furthermore, we demonstrated that the shape of the nanostructures can be controlled by adjusting the process parameter optimization. | |
| FMCp2-7 | A Laser Welding Packaging Technology for LCD *Xiaogang Hu1,3, Ye wan1,3, Bi Zhu1, Jiahe Cheng1,3, Xugang Luo2, Zhicong Kang1, Zhenghong Chen1 1. Chongqing HKC Optoelectronics Technology Co.,ltd (China), 2. Chuzhou HKC Optoelectronics Technology Co., Ltd (China), 3. Chongqing Advanced Photoelectric Display Technology Research Institute (China) |
| We reported a novel LCD in this paper which characterized with high peeling strength of >2kgf by narrow border products. The high peeling strength were attributed to laser welding packaging technology. In this work a 75 W green femtosecond laser equipped with a 255 mm-long focal scanning galvanometer was employed to achieve non-optical contact high-speed welding of display screen glasses. | |
| FMCp2-8 | New Gen.6 Exposure Tools and Technologies for Improving Overlay Accuracy Nobuhiko Yabu1, Sunao Endo1, Qu Zhang1, *Reo Sasaki1, Takeshi Fujita1, Tomohiro Nishikawa1, Tomoya Yoshizawa1, Yoshinori Osaki1 1. Canon Inc. (Japan) |
| Canon has released MPAsp-E1003H, new Gen.6 exposure tools with high resolution and high productivity. They also achieve high overlay accuracy by new distortion compensation technology. | |
| FMCp2-9 | Study on the Exposure Principles and Design Rules of Nikon Exposure Machine With ITO2 PSM Mask in LTPS LCD *Wu Jing1, Xuexin Lan1, Chunrong Lin1, Yanmei Li1, Xianyan Yang1 1. XiaMen Tianma Microelectronics Co., Ltd., (China) |
| The Nikon 67S PHT machine has different exposure modes and diffraction patterns compared to the 68S model, which affects the design and compensation for 3-slit ITO2 patterns. This study clarified the 67S's exposure principles through analysis and experiments, establishing design rules for creating 3-slit patterns on the 67S. | |
| FMCp2-10 | Impact of Selective Substitutional Growth on Subthreshold Swing by PEALD Deposition Sequences *SeongHun Yoon1, Seon Woong Bang1, Jae Kyeong Jeong1 1. Hanyang University (Korea) |
| In this study, the impact of various metal defects formed through selective substitutional growth by diethylzinc (DEZn) on the subthreshold swing (SS) in plasma-enhanced atomic layer deposition (PEALD)-derived indium-gallium-zinc oxide (IGZO) films was investigated. Among these defects, In-Zn defects were found to play a critical role in achieving a high SS value of 0.31 V/decade in IGZO thin-film transistors (TFTs). | |
| FMCp2-11 | Investigation of Curing Conditions for Binder Materials Containing Fluorescent Materials at Low Temperatures *Naoki Ohtani1, Anon Eto1, Hinako Kakehashi1, Shuhei Matsuoka1 1. Doshisha University (Japan) |
| The curing conditions of binder materials containing organic-based fluorescent materials at low temperatures were investigated because the organic materials are easily destroyed at high temperatures. We tested fluorescent polymer, low-weight molecular, and Eu-complex. We found that it was possible to cure the gel without annealing under vacuum. | |
| FMCp2-12L | Effect of Combination Annealing with Water and Ethanol Vapors Added to NH3 Gas on Reduction of Residual OH Bonds in Si Oxide Films *Susumu Horita1 1. Japan Advanced Institute of Science and Technology (Japan) |
| It was found that reduction of residual OH bonds in SiOx films by using the combination NH3 annealing, in which dry, water-vapor-added, and ethanol-vapor-added NH3 gases are flown in sequence, is effective more than the cases with a single dry and a single water-added NH3 gas. We discuss this based on rehydroxylation and dehydroxylation of Si-O-Si bonds, and alkoxylation ... | |
| FMCp2-13L | Study on the Thermal Simulation of Cooling Susceptor to Reduce Damage to Glass Substrate During Sputtering Process for OLED Display of the 8.5th generation *Hyun Min Cho1, Yedalm Kim1, Gang Yeol Yoo1, Sangwon Shin2, Yuhwa Choi2 1. Korea Electronics Technology Institute (Korea), 2. H&iruja Co., Ltd (Korea) |
| The size of glass substrates continues to increase to reduce the production cost of OLED displays. Accordingly, cooling of the susceptor for the sputtering system has also become very important. In this study, a thermal simulation was conducted to confirm the cooling effect by the cooling flow path, cooling fluid and additional cooling gas in the susceptor of the sputtering system for the 8.5th generation. | |
| FMCp2-14L | Influence of Wet and Dry Etching on IGZO TFTs Focusing on Sidewall Conductance and Hump Phenomenon *Minsik Kong1, Soo-Yeon Lee1 1. Seoul National University (Korea) |
| This study explores the effects of wet and dry etching on the performance of IGZO TFTs, focusing on sidewall conductance and oxygen vacancy formation. Transfer curve measurements and positive and negative gate bias stress results revealed that wet-etched TFTs exhibited more pronounced humps, likely due to increased oxygen vacancies on the exposed sidewalls. In contrast, dry-etched TFTs showed minimal shift in the NBS test and ... | |
| FMCp2-15L | Dependence of Recovery Characteristics of a-IGZO TFTs on Annealing Temperature *Seungjun Choi1, Byung Seong Bae1, Seung Jae Moon2 1. Hoseo university (Korea), 2. Ulsan National Institute of Science and Technology (Korea) |
| We investigated the temperature-dependent recovery of threshold voltage shifts in a-IGZO TFTs after gate bias application. Recovery was observed below 110 °C due to charge release, and above 110 °C due to trap state annihilation. This study suggests hydrogen plays a key role in trap state changes under gate bias. |
Workshop on Inorganic Emissive Display and Phosphors
| Dec. 4 | 14:50-15:50 | Room 108 | PH1 | Phosphors and Devices |
| Dec. 4 | 16:40-18:00 | Mid-sized Hall B | OLED3/PH2 | QD Technologies |
| Dec. 5 | 9:00-10:20 | Mid-sized Hall B | FMC3/PH3 | Emissive Materials and Components |
| Dec. 4 | 13:20-14:40 | Main Hall | PHp1 | Phosphors and Devices (1) |
| Dec. 4 | 13:20-14:40 | Main Hall | PHp2/OLEDp1 | QD Phosphors and Devices (1) |
| Dec. 5 | 11:10-12:30 | Main Hall | PHp3 | Phosphors and Devices (2) |
| Dec. 5 | 11:10-12:30 | Main Hall | PHp4/OLEDp3 | QD Phosphors and Devices (2) |
PH1: Phosphors and Devices
Dec. 4 14:50-15:50 Room 108
Chair: Kazuhiko Hara (Shizuoka University)
Co-Chair: Koutoku Ohmi (Tottori Univ.)
| PH1-1
14:50 |
Invited Lanthanide Coordination Phosphors for Next Generation LED Displays *Takayuki Nakanishi1 1. National Institute for Material Science (Japan) |
| Lanthanide coordination phosphors, which are composed of π-conjugated ligands with light absorption ability and rare-earth ions as luminescent centers, are next-generation organic-inorganic phosphors that can simultaneously achieve pure color purity with strong emission. In this paper, we would like to introduce the possibility of designed coordination phosphor series as candidates for LCD backlights and miniLED displays. | |
| PH1-2
15:10 |
Invited Investigation of Luminescent Solar Concentrator using Fluorescent Quantum Dot with a Large Stokes Shift *Yoshiki Iso1, Tetsuhiko Isobe1 1. Keio University (Japan) |
| CuGaS2/ZnS quantum dot (QD), which shows efficient defect-related photoluminescence with a large Stokes shift, is one of the candidate phosphors for luminescent solar concentrators (LSCs). The luminescence and scattered incident light from the QDs in a polymer film contributed to power generation of the LSC. However, the optical absorption of the light guide plate prevented these effects. | |
| PH1-3
15:30 |
High-Durability Sulfide Red-Emitting Phosphor *Seika Tokumitsu1, Yutaka Anzai1, Tsuneo Kusunoki1, Satoshi Makio1 1. OXIDE Corporation (Japan) |
| To produce a high-durability red-emitting phosphor, Eu doped CaS (CaS:Eu) was crystalized. Single crystals with a <100> orientation were obtained without cracks or impurities. The internal quantum efficiency was improved using annealing treatment, exceeding that of CaS:Eu powder. The single crystals had higher moisture resistance than that of CaS:Eu powder. |
OLED3/PH2: QD Technologies
Special Topic of Interest on Quantum Dot Technologies
Dec. 4 16:40-18:00 Mid-sized Hall B
Chair: Toshiaki Ikuta (SK Materials JNC)
Co-Chair: Kazuhiko Hara (Shizuoka University)
| OLED3/PH2-1
16:40 |
Invited Highly Efficient Near-Infrared Emission FAPbI3 Perovskite Nanocrystal Light Emitting Diodes *Takayuki Chiba1, Mizuho Uwano1, Haruka Abe1 1. Yamagata University (Japan) |
| Organic-inorganic hybrid FAPbI3 perovskite nanocrystals (NCs) hold great promise as a material for near-infrared light-emitting diodes (LEDs), however, face challenges such as poor crystal stability and limited device efficiency. Here, we demonstrated the precise size control of the ZnI2-treated FAPbI3 NCs to both enhance crystal stability and LED performance simultaneously. | |
| OLED3/PH2-2
17:00 |
Green Solvent Strategies for Inverted Structure QD-LED *Hyo-Bin Kim1, Su-Hyeon Lee1, Jeong-Beom Kim1, Jae-In Yoo1, Sung-Cheon Kang1, Jang-Kun Song1 1. Sungkyunkwan University (Korea) |
| This study presents a new methodology for identifying environmentally friendly solvents for inverted structure quantum dot light-emitting diodes (QD-LEDs) hole transport layers (HTL), using Hansen solubility parameters (HSPs) and solvent selection guidelines (SSGs). We discovered a green solvent that enhances processability and device performance with a clear interface. | |
| OLED3/PH2-3
17:20 |
Enhancing Quantum Efficiency of InP/ZnSe/ZnS Quantum Dots with Thick ZnS Shell using Reactive Sulfur Precursor *Kangwoo Lee1, Boram Kim1, Yonghyeok Choi1, Mina Kim1, Jinseop Yoon1, Jinchul Park1, Eunjoo Jang1, Heeyeop Chae1 1. Sungkyunkwan University (Korea) |
| The quantum efficiency of indium phosphide (InP) quantum dots (QDs) with thick-zinc sulfide (ZnS) shell improved by using reactive hexamethyldisilazane ((TMS)2S) as a sulfur (S) precursor. This method prevents anisotropic growth and suppresses nonradiative Förster energy transfer, enhancing photoluminescence quantum yield by 10% compared to conventional S powder. | |
| OLED3/PH2-4L
17:40 |
Two Sub-pixel Full Color Display for Ultra-high Resolution withAC Tandem Structure *Seong-Kuk Park1, Hyo-Bin Kim1, Jang-Kun Song1, Sang Min Won1 1. Sungkyunkwan University (Korea) |
| We present a device aimed at high-resolution displays capable of achieving full color with only two sub-pixels. By applying an AC tandem structure along with photolithography and lift-off techniques, we implemented pixel patterning without the need for FMM or color filters. The simplified process and device structure demonstrate the potential for high-resolution display applications. |
FMC3/PH3: Emissive Materials and Components
Special Topic of Interest on Quantum Dot Technologies
Dec. 5 9:00-10:20 Mid-sized Hall B
Chair: Genichi Motomura (NHK)
Co-Chair: Tsuneo Kusunoki (Oxide)
| FMC3/PH3-1
9:00 |
Invited Synthesis and Tunable Optical Properties of Ag-In-Ga-S Quantum Dots for LED Applications *Tsukasa Torimoto1, Makoto Tozawa1, Kazutaka Akiyoshi1, Tatsuya Kameyama1, Genichi Motomura2, Taro Uematsu3, Susumu Kuwabata3 1. Nagoya University (Japan), 2. Japan Broadcasting Corporation (Japan), 3. Osaka University (Japan) |
| Quantum dots (QDs) composed of Ag-In-Ga-S solid solution had a tunable energy gap (Eg) that increased with an increase in the Ga/In ratio. These QDs exhibited a sharp band-edge photoluminescence peak by GaSx shell coating. Light-emitting diodes fabricated with these QDs exhibited a bright electroluminescence peak, with the color tunable from yellow to green to blue by varying ... | |
| FMC3/PH3-2
9:20 |
Highly Efficient Organic-Based Photoluminescent Dye for Color Conversion Display Applications *Sadahiro Nakanishi1, Hiroaki Ueno1, Toru Umemoto1, Jie Cai2, Jeffery Hammaker2, Tissa Sajoto2, Luis Vellegas2, Shijun Zheng2 1. Nitto Denko Corporation (Japan), 2. Nitto Denko Technical Corporation (United States of America) |
| This paper reports the highly efficient and high color purity red and green organic-based photoluminescent materials for mini-LED backlight films and in-pixel color converters. The advantages of high optical density achieved by our organic-based color converter will be presented. | |
| FMC3/PH3-3
9:40 |
Quantum Dot Color Conversion Films with High Contents of Quantum Dots by Ligand Modification and Dispersants *Yonghyeok Choi1, Kangwoo Lee1, Mina Kim1, Jinchul Park1, Heeyeop Chae1 1. Sungkyunkwan University (Korea) |
| InP Quantum dot color conversion films containing up to 50wt% of QDs were developed and investigated for effective color conversion in this work. QD surface was modified to acrylate-terminated ligands and dispersant was blended in the siloxane polymer matrix. Up to 64% of color conversion efficiency was demonstrated and blue leakage was reduced by 44% compared to 20wt% QD containing films. | |
| FMC3/PH3-4
10:00 |
Photolithographic Quantum Dot Patterning Using Plasma-Induced Ligand Polymerization and Photoresist Mask *Mina Kim1, Boram Kim1, Yonghyeok Choi1, Jinchul Park1, Heeyeop Chae1 1. Sungkyunkwan University (Korea) |
| Microscale patterning of quantum dot (QD) was achieved with plasma-induced ligand polymerization and plasma sputter etching using a photoresist (PR) masking layer in this work. The ligands of QDs were cross-linked with Ar plasma and unprotected QD layer were etched through a subsequent plasma sputter etching processes. The cross-linked QD layer was patterned in 3 μm scale. |
PHp1: Phosphors and Devices (1)
Dec. 4 13:20-14:40 Main Hall
| PHp1-1L | Electroluminescence Analysis of Carrier Dynamic in AlGaInP-LEDs and thermal Effects for Small-Pitch Display *Bo-Liang Wu1,2, Yi-Ping Wang1,2, Xiu-Mei Lu1, Frank Huang3, Aming Liao4, Zi-Yan Zhan1, Kazuto Nishikawa5, Hung-Pin Hsu1 1. Ming Chi University of Technology (Taiwan), 2. Industrial Technology Research Institute (Taiwan), 3. Denkei Technical Partner (Taiwan), 4. Sunjsong Technology (Taiwan), 5. TOPCON Technohouse Corporation (Japan) |
| This study measures EL in AlGaInP LEDs with varying compositions, producing red to green wavelengths. Temperature-dependent analysis from 10K to 300K examines transition signals and FWHM changes. Samples show typical semiconductor red-shifted with heating. Prolonged use of small-pitch direct-view LEDs may lead to thermal accumulation, affecting transitions and displayquality. | |
| PHp1-2L | Charge Transfer State of Eu3+ activated LaSiO2N Synthesized in NH3 *Hiroki Shinoda1, Takashi Kunimoto2, Koutoku Ohmi1 1. Tottori University (Japan), 2. Tokushima Bunri University (Japan) |
| LaSiO2N:Eu3+ phosphor has been synthesized by firing at 1350°C in NH3 and by post-annealing in O2 at 550°C. The obtained phosphor shows a red photoluminescence (PL) under the irradiation of 450 nm-blue-LED even at room temperature. |
PHp2/OLEDp1: QD Phosphors and Devices (1)
Special Topic of Interest on Quantum Dot Technologies
Dec. 4 13:20-14:40 Main Hall
| PHp2/OLEDp1-1L | Dual Color AC Tandem QDLED Fabricated Using Ink-Jet Printing *Young-Jae Ko1, Hyo-Bin Kim1, Jang-Kun Song1, Ha-Rim Jung1 1. Sungkyunkwan University (Korea) |
| This study introduces a novel method for creating full-color displays using inkjet-printed quantum dot light-emitting diodes (QD-LEDs) with dual-color subpixels (red-blue and green-blue). The devices can switch colors based on voltage polarity, while brightness is controlled by voltage intensity. This approach simplifies the patterning process and enhances electro-optical efficiency, offering a cost-effective solution for future display technologies. | |
| PHp2/OLEDp1-2L | Study of the Stability of Quantum Dot Material Using ALD Encapsulation at Above-Room Temperatures for Mini-LED Applications *Ya-Hsuan Chen1, Pei-Yu Chu2, Yan-Rou Wang3, Yun-Zhen Liu1, Chin-Cheng Weng4, Chen-Ling Tsai1, Yi-Ping Wang1 1. Ming Chi University of Technology (Taiwan), 2. Mediatek (Taiwan), 3. Advantech (Taiwan), 4. Industrial Technology Research Institute (Taiwan) |
| In automotive displays, the demand for a wide color gamut highlights the importance of Quantum Dot technology. This study examines quantum dots encapsulated with Atomic Layer Deposition by measuring photoluminescence at above-room temperatures. It compares peak shifts and analyzes how ALD improves quantum dot stability under high temperatures. | |
| PHp2/OLEDp1-3L | Polyetheramine Matrix Protected Perovskite Nanocrystals *Jeong Bin Park1, Yujin Choi1, Parani Sundararajan1, Jang-Kun Song1 1. SungKyunKwan University (Korea) |
| This study introduces polyetheramine as a polymer matrix for enhanced passivation of perovskite nanocrystals (PNCs), improving their stability and optical properties. Polyetheramine reduces aggregation and boosts passivation. Treated PNCs showed a 58% photoluminescence yield compared to 44% without matrix, with better particle separation in SEM images. These findings highlight its potential for perovskite-based LEDs. | |
| PHp2/OLEDp1-4L | Enhancing Light Outcoupling of Quantum-Dot Light-Emitting Diodes by Using a Nanoparticle Scattering Layer *Da Yeon Hyeong1, Chang Kyo Kim1, Honyeon Lee1 1. Soonchunhyang University (Korea) |
| This work aims to enhance the light extraction efficiency of quantum-dot light-emitting diode (QLED). We fabricated a light-scattering layer using a polymer—nanoparticle composite in a one-step process. By optimizing the distribution and scattering properties of nanoparticle, we improved outcoupling. Based on these experimental results, we will elucidate mechanisms for enhancing the light extraction efficiency of QLEDs. |
PHp3: Phosphors and Devices (2)
Dec. 5 11:10-12:30 Main Hall
| PHp3-1 | Image Processing-Based Study on Luminance and Color Distribution in Inorganic EL Devices *Taketo Sato1, Tatsuya Kaku1, Shuichi Sato1 1. Tokyo Denki University (Japan) |
| This study introduces a cost-effective image processing technique to evaluate electroluminescence devices using standard cameras. Unlike expensive traditional photometers, our method effectively captures brightness and chromaticity data, delivering comparable results across the devices with different configurations. It enhances device analysis by providing better insights into uniformity and intensity. | |
| PHp3-2 | Luminescence Properties of Narrow Band Yellow Emitting Phosphor SrLi3AlO4:Eu2+ for White LEDs *Hiroaki Toyoshima1, Takayuki Nakanishi2, Shiro Funahashi2, Hideyuki Emoto1, Naoto Hirosaki2, Koji Morita2,3 1. Denka Co.,Ltd. (Japan), 2. National Institute for Materials Science (Japan), 3. Kyushu University (Japan) |
| Narrow-band emitting phosphors are strongly required in order to achieve high brightness and wide color gamut in displays.Here, we intoroduce novel narrow-band yellow-emitting phosphor, SrLi3AlO4:Eu2+, and it's luminescence properties. | |
| PHp3-3 | Study of the Color Gamut of White Light LEDs Doped with K2SiF6: Mn4+ for Front Light Sources in Reflective Automotive Display Modules *Pei-Chun Chen1, Yun-Zhen Liu1, Mike Casper2, Frank Huang3, Jim Luo4, Kazuto Nishikawa5, Wei-Ting Liu6, Zi-Yan Zhan1, Xiu-Mei Lu1, Yi-Ping Wang1 1. Ming Chi University of Technology (Taiwan), 2. Azumo, LLC (United States of America), 3. Denkei Technical Partner (Taiwan), 4. Everlight Electronics Corporation Limited (Taiwan), 5. TOPCON Technohouse Corporation (Japan), 6. Smart Film Device Association (Japan) |
| This study uses electroluminescence to analyze the optical properties of K2SiF6: Mn4+ doped in white LEDs. Their application as front light sources for reflective techniques in automotive displays is discussed. Results show no shift in temperature. It enhances the color gamut as a light source that benefits automotive solutions. |
PHp4/OLEDp3: QD Phosphors and Devices (2)
Special Topic of Interest on Quantum Dot Technologies
Dec. 5 11:10-12:30 Main Hall
| PHp4/OLEDp3-1 | Effect of Shell Growth Temperature on Synthesis Green Ag-In-Ga-S/AgGaS2 Quantum Dot *Jinseop Yoon1, Jinchul Park1, Kangwoo Lee1, Boram Kim1, Mina Kim1, Yonghyeok Choi1, Eunjoo Jang1, Heeyeop Chae1 1. Sungkyunkwan University (Korea) |
| AgInGaS2/AgGaS2 quantum dots (QDs) were synthesized, exhibiting a photoluminescence quantum yield (PLQY) of 67% and a full width at half maximum (FWHM) of 37 nm at 535 nm in this work. The AgGaS2 shell was uniformly grown by controlling the cation exchange reaction between the In atoms in the core and Ga precursor through adjusting the shell growth temperature. | |
| PHp4/OLEDp3-2 | Synthesis Blue Emissive Te-doped ZnSe Quantum Dots by Controlling Se Precursor Reactivity *Jinchul Park1, Boram Kim1, Yonghyeok Choi1, Kangwoo Lee1, Mina Kim1, Eunjoo Jang1, Heeyeop Chae1 1. Sungkyunkwan University (Korea) |
| ZnTeSe@ZnSe/ZnS quantum dots have been synthesized and demonstrated 80% photoluminescence quantum yield with photoluminescence emission at 435 nm in this work. ZnTeSe core with a diameter of 4 nm was synthesized uniformly and the reactivity of the Se precursor was controlled by adding diphenylphosphine at ZnSe shell growth stage, resulting in uniform growth of ZnSe shell with thickness of 1.5 nm. | |
| PHp4/OLEDp3-3 | Modulation of Shell Structure for Green Emission Quantum Dot Color Converter Film *Liguo Chen1, Chengjian Liu1, Ran Zhang1, Wencan Deng1, Binqian Zhou1,4, Yu Zhou1, Hua Xiao2, Xijian Duan3, Chengcheng Li3, Haochen Liu5, Haodong Tang1, Jiaji Cheng4, Yulong Chen1, Junjie Hao1 1. Shenzhen Technology University (China), 2. Guangdong Ocean University (China), 3. Southern University of Science and Technology (China), 4. Hubei University (China), 5. City University of Hong Kong (China) |
| We present a novel synthesis method for green emission CdSe/CdS quantum dots (QDs), which exhibit excellent blue light conversion efficiency. Compared with traditional green emitting alloy QDs, the mass light conversion efficiency can be improved by 16 times. This achievement will lay the foundation for the realization of full-color Micro-LED. | |
| PHp4/OLEDp3-4 | Small-Sized CsPbBr3 Perovskite Quantum Dots for Pure Blue LEDs *Yuna Igarashi1, Takayuki Chiba1 1. Yamagata university (Japan) |
| Lead halide perovskite quantum dots (PeQDs) are promising materials for solution-processed light-emitting devices due to their high photoluminescence quantum yield (PLQY). This study focuses on the synthesis of small-sized CsPbBr3 PeQDs to achieve pure blue emission. By optimizing condition during synthesis, we obtained a high colloidal ink concentration and successfully fabricated a thin film. | |
| PHp4/OLEDp3-5 | Concentration-Dependent Photoluminescence of CsPbX3 Perovskite Nanocrystals for Wide-Color Gamut Display Hangyu He1, Fanghao Ye1, Guoliang Zhuang1, Fion Sze Yan Yeung2, *Guijun LI1 1. Shenzhen University (China), 2. The Hong Kong University of Science and Technology (Hong Kong) |
| Here, we find that the regulation of the concentration of perovskite nanocrystals dispersion affects its PL spectrum, especially the linewidth. A proper concentration narrows the full width at half-maximum (FWHM) of the red, green and blue primary color spectra to 25 nm, 20 nm and 14 nm, respectively, which covers ∼91% Rec. 2020 standard in the CIE 1931 color space. | |
| PHp4/OLEDp3-6 | Colloidal Quantum Dot Patterning using Plasma-Induced Ligand Polymerization and Argon Sputter Etching *Boram Kim1, Mina Kim1, Kangwoo Lee1, Jinseop Yoon1 1. Sungkyunkwan University (Korea) |
| Quantum dot (QD) ligands were cross-linked by Ar plasma to form QD films, and the cross-linked QDs were patterned by Ar sputter etching in this work. The cross-linked ligands were confirmed by Fourier-transform infrared spectroscopy. In the next step, 50μm patterns were fabricated with argon sputter etching processes with shadow masks. This patterning process is expected to offer a non-destructive solution for the fabrication of ... | |
| PHp4/OLEDp3-7 | Characteristics of Quantum-dot Light-Emitting Diodes Exchanged Organic Ligands by Metal Salts *Jimin Lee1, Honyeon Lee1, Chang Kyo Kim1 1. Soonchunhyang University (Korea) |
| We studied the device characteristics of quantum-dot light-emitting diodes (QLEDs) with organic ligands replaced by inorganic metal salts. Using metal salts and polar solvents, we successfully substituted the organic ligands on the quantum dot surface with inorganic ligands, resulting in a significant improvement in device performance. |
Workshop on OLED Displays and Related Technologies
| Dec. 4 | 13:00-14:20 | Mid-sized Hall B | OLED1 | OLED Panel Technologies |
| Dec. 4 | 14:50-16:10 | Mid-sized Hall B | OLED2 | OLED Materials |
| Dec. 4 | 16:40-18:00 | Mid-sized Hall B | OLED3/PH2 | QD Technologies |
| Dec. 5 | 13:30-14:50 | Mid-sized Hall A | OLED4 | Device Analyses and Physics |
| Dec. 5 | 15:20-16:40 | Mid-sized Hall A | OLED5 | OLED Displays |
| Dec. 6 | 9:00-10:20 | Mid-sized Hall B | OLED6 | OLED Advanced Technologies |
| Dec. 6 | 13:30-14:50 | Mid-sized Hall B | FMC9/OLED7 | OLED Manufacturing Technology |
| Dec. 4 | 13:20-14:40 | Main Hall | PHp2/OLEDp1 | QD Phosphors and Devices (1) |
| Dec. 5 | 11:10-12:30 | Main Hall | OLEDp2 | OLED Device Technologies |
| Dec. 5 | 11:10-12:30 | Main Hall | PHp4/OLEDp3 | QD Phosphors and Devices (2) |
| Dec. 6 | 11:10-12:30 | Main Hall | OLEDp4 | OLED Manufacturing |
| Dec. 6 | 13:50-15:10 | Main Hall | FLXp2/OLEDp5 | Devices and Materials for Flexible OLED |
OLED1: OLED Panel Technologies
Dec. 4 13:00-14:20 Mid-sized Hall B
Chair: Yoshinori Fukuda (Futaba)
Co-Chair: Masaya Adachi (Japan Display Inc.)
| OLED1-1
13:00 |
Invited Effective Control of Lateral Current by Hole Transport Materials *Ji-Dong Seo1, Su-Hwan Na1, You-Hyun Kim2, Leo Weegels2, Christian Eickhoff2, Falk May2, Jens Engelhart2, Sebastian Meyer2, Michele Ricks3, Joachim Kaiser2 1. Merck Performance Materials Ltd. (Korea), 2. Merck KGaA (Germany), 3. EMD Performance Materials (United States of America) |
| The lateral current flowing horizontally from an active pixel to neighboring non-active sub-pixels can cause crosstalk in OLED panels. We investigated lateral current from OLED devices and present newly developed hole transport materials (HTM) that effectively suppress this current, preventing sub-pixel crosstalk without compromising device parameters such as driving voltage, lifetime and power consumption. | |
| OLED1-2
13:20 |
Lifetime Improvement in Tandem OLED Devices *Jung geun Shin1, Jun hyeog Oh1, Hye rin Kim1, Jang hyuk Kwon1 1. Kyung Hee University (Korea) |
| In this paper, we report a lifetime improvement way in the tandem OLED by thin Yb inter-layer insertion in the charge generation layer. This method resulted in about 23% lifetime enhancement (@LT95) due to n-dopant diffusion protection of n-doped electron transport layer | |
| OLED1-3L
13:40 |
Impact of Donor and Acceptor Modification on TADF and Roll-off Behaviors in Solution-Processed OLED Heetae Yang1, *Thi Na Le1, Nargis Ali1, Yun-Hi Kim2, Min Chul Suh1 1. Kyung Hee University (Korea), 2. Gyeongsang National University (Korea) |
| A comprehensive analysis of the up-conversion of triplet to singlet excitons was conducted for two newly designed D-A type TADF molecules, SiPhCzTrz and SiTrzPhCz. Their differing TADF behaviors, influenced by the positioning of the electron donor (PhCz) and acceptor (Trz), led to varying effects on efficiency roll-off in OLEDs using phosphorescent dopant. | |
| OLED1-4L
14:00 |
Textile-based Flexible Heating OLED for Wearable Photomedicine Healthcare Display *Seojin Kim1, Yuhwa Bak1, Youjin Cho1, Chaeyeong Lee1, Dong Gyun Kim1, Ye Ji Shin1, Minseong Park1, Youngwoo Kim1, Won Woo Lee1, Jeong Hyun Kwon2, Eou-Sik Cho1, Sang Jik Kwon1, Yongmin Jeon1 1. Gachon University (Korea), 2. Chungbuk National University (Korea) |
| This study presents flexible heating OLED that can operate independently by integrating RED OLED onto DMD(Dielectric/ Metal/ Dielectric) electrode patterned with Kirigami. By employing a Kirigami pattern and MoO3/Ag/MoO3 structure for the heater, it successfully fulfills its role as a heating element while permitting light transmission during OLED operation. |
OLED2: OLED Materials
Dec. 4 14:50-16:10 Mid-sized Hall B
Chair: Hitoshi Kuma (Idemitsu Kosan)
Co-Chair: Kenichi Goushi (Kyushu Univ.)
| OLED2-1
14:50 |
Invited Boron-based Materials for Blue Organic Light-Emitting Diodes *Jun Yeob Lee1, Jinho Park1, Unhyeok Jo1, Dong Ryun Lee2, Han Jin Ahn2, Jun Yun Kim2, Ji-Ho Baek2 1. Sungkyunkwan University (Korea), 2. LG Display (Korea) |
| Boron derived materials are attractive as emitters for red, green and blue organic light-emitting diodes due to high efficiency and narrow emission spectrum. They are also promising as the host materials of phosphorescence emitters. In this work, novel boron derivatives were developed for use as emitters and hosts for organic light-emitting diodes. | |
| OLED2-2
15:10 |
Invited Highly Luminescent Aluminum Complexes with β-Diketone Ligands Exhibiting TADF for High-Performance Solution-Processed OLEDs *Hisahiro Sasabe1, Keigo Hoshi1, Yudai Chiba1, Misaki Matsuya1, Kohei Nakao1, Junji Kido1 1. Yamagata University (Japan) |
| Unlocking the full potential of TADF emitters using ubiquitous metals is challenging. Recently, we developed highly luminescent aluminum complexes with β-diketone ligands exhibiting TADF. These complexes have enabled high-efficiency solution-processed OLEDs with EQEs over 20%, and serve as superior sensitizers, producing narrow emission band OLEDs with a FWHM of 45 nm and EQEs exceeding 20%. | |
| OLED2-3
15:30 |
The Next Generation Green OLED Technology with Phosphor Sensitized Multiple Resonance Emitters *Xiao Liang1, Xudong Cao1, Dongdong Zhang2, Lian Duan2, Chong Li1 1. Jiangsu Sunera Technology (China), 2. Tsinghua University (China) |
| Phosphor-sensitized OLEDs could significantly enhance exciton consumption through faster FRET and radiative rates compared to phosphorescent emitters, leading to boosted efficiency and lifespan. This approach combined with multiple resonance emitters resulted in green OLEDs achieving over 260 cd/A at 10 mA/cm2, lifetime increase of over 80%, high tolerability towards concentration fluctuations and remarkable thermal stability. | |
| OLED2-4L
15:50 |
Invited Core-Shell Wavefunction Modulation Targeting Stable and Narrowband OLEDs *Xun Tang1, Masahiro Hayakawa2, Takuji Hatakeyama2, Chihaya Adachi1 1. Kyushu University (Japan), 2. Kyoto University (Japan) |
| Efficient red-green-blue primary luminescence with exceptional narrowband and high durability is essential for cutting-edge display applications. We propose a paradigm of electronic donor/acceptor “core-shell” modulation in a multiple-resonance skeleton, utilizing the intramolecular charge transfer to achieve wavelength tuning from 447 to 624 nm (∼0.8 eV) with excellent device stability. |
OLED3/PH2: QD Technologies
Special Topic of Interest on Quantum Dot Technologies
Dec. 4 16:40-18:00 Mid-sized Hall B
Chair: Toshiaki Ikuta (SK Materials JNC)
Co-Chair: Kazuhiko Hara (Shizuoka University)
| OLED3/PH2-1
16:40 |
Invited Highly Efficient Near-Infrared Emission FAPbI3 Perovskite Nanocrystal Light Emitting Diodes *Takayuki Chiba1, Mizuho Uwano1, Haruka Abe1 1. Yamagata University (Japan) |
| Organic-inorganic hybrid FAPbI3 perovskite nanocrystals (NCs) hold great promise as a material for near-infrared light-emitting diodes (LEDs), however, face challenges such as poor crystal stability and limited device efficiency. Here, we demonstrated the precise size control of the ZnI2-treated FAPbI3 NCs to both enhance crystal stability and LED performance simultaneously. | |
| OLED3/PH2-2
17:00 |
Green Solvent Strategies for Inverted Structure QD-LED *Hyo-Bin Kim1, Su-Hyeon Lee1, Jeong-Beom Kim1, Jae-In Yoo1, Sung-Cheon Kang1, Jang-Kun Song1 1. Sungkyunkwan University (Korea) |
| This study presents a new methodology for identifying environmentally friendly solvents for inverted structure quantum dot light-emitting diodes (QD-LEDs) hole transport layers (HTL), using Hansen solubility parameters (HSPs) and solvent selection guidelines (SSGs). We discovered a green solvent that enhances processability and device performance with a clear interface. | |
| OLED3/PH2-3
17:20 |
Enhancing Quantum Efficiency of InP/ZnSe/ZnS Quantum Dots with Thick ZnS Shell using Reactive Sulfur Precursor *Kangwoo Lee1, Boram Kim1, Yonghyeok Choi1, Mina Kim1, Jinseop Yoon1, Jinchul Park1, Eunjoo Jang1, Heeyeop Chae1 1. Sungkyunkwan University (Korea) |
| The quantum efficiency of indium phosphide (InP) quantum dots (QDs) with thick-zinc sulfide (ZnS) shell improved by using reactive hexamethyldisilazane ((TMS)2S) as a sulfur (S) precursor. This method prevents anisotropic growth and suppresses nonradiative Förster energy transfer, enhancing photoluminescence quantum yield by 10% compared to conventional S powder. | |
| OLED3/PH2-4L
17:40 |
Two Sub-pixel Full Color Display for Ultra-high Resolution withAC Tandem Structure *Seong-Kuk Park1, Hyo-Bin Kim1, Jang-Kun Song1, Sang Min Won1 1. Sungkyunkwan University (Korea) |
| We present a device aimed at high-resolution displays capable of achieving full color with only two sub-pixels. By applying an AC tandem structure along with photolithography and lift-off techniques, we implemented pixel patterning without the need for FMM or color filters. The simplified process and device structure demonstrate the potential for high-resolution display applications. |
OLED4: Device Analyses and Physics
Dec. 5 13:30-14:50 Mid-sized Hall A
Chair: Yutaka Noguchi (Meiji Univ.)
Co-Chair: Kengo Kishino (Idemitsu Kosan)
| OLED4-1
13:30 |
Invited Intermittent Deposition for Controlling Molecular Orientation in OLED *Masahiro Ohara1, Taiyo Inoue1, Sowon Kim1, Yuya Tanaka2, Hirohiko Fukagawa1, Hisao Ishii1 1. Chiba University (Japan), 2. Gunma University (Japan) |
| Molecules in amorphous thin films are anisotropically oriented, generating a giant surface potential (GSP) on the film surface, and the magnitude of the GSP is known to vary significantly depending on deposition parameters. In this study, we propose a new control method using the surface orientation relaxation process of molecules by introducing an interval in the deposition process. | |
| OLED4-2
13:50 |
Probing Exciton Formation at the Organic Interfaces of Multilayer OLEDs under Operation using Electronic Sum-Frequency Generation Spectroscopy *Tatsuya Kaburagi1, Kazunori Morimoto1, Takayuki Miyamae1 1. Chiba University (Japan) |
| Understanding the interfacial electronic states is important to optimize the OLED structures. In this study, electronic sum-frequency generation (ESFG) spectroscopy is applied for the investigation of the electronic transition states of the OLEDs. ESFG measurements under operation revealed changes in ESFG spectra originating from formation of the exciton at the emission layer interface. | |
| OLED4-3L
14:10 |
Invited Control of Spontaneous Orientation Polarization in Organic Semiconductors: The Role of Molecular Structure and Film Growth Condition *Wolfgang Bruetting1, Albin Cakaj1, Markus Schmid1, Alexander Hofmann1 1. University of Augsburg (Germany) |
| Spontaneous orientation polarization (SOP) occurs when molecules with a finite permanent dipole moment are grown as thin films by physical vapor deposition and their alignment is such that a net non-zero polarization remains. We discuss how SOP in organic semiconductors can be controlled by the design of molecules as well as the film growth conditions and discuss its relevance in organic light-emitting devices. | |
| OLED4-4L
14:30 |
Invited Development of Polar Small Molecules Exhibiting Spontaneous Orientation Polarization and Their Application to OLEDs *Masaki Tanaka1 1. Tokyo University of Agriculture and Technology (Japan) |
| This study developed fluoroalkyl-based polar molecules exhibiting spontaneous orientation polarization in vacuum-deposited films with a surface potential growth rate of over 200 mV/nm relative to the film thickness. Furthermore, the author revealed that introducing dipolar layers between organic/organic interfaces modulates charge injection barriers in OLEDs to improve device performance. |
OLED5: OLED Displays
Dec. 5 15:20-16:40 Mid-sized Hall A
Chair: Yasunori Kijima (Huawei Techs. Japan)
Co-Chair: Kaoru Abe (Japan Display)
| OLED5-1
15:20 |
Invited 31” 4K Flexible Printed OLED TV Display Technology *Juenggil James Lee1,2, Zhuo Gao1, Ting Dong1, Lei Yu1, Dong Fu1,2, Xiaolin Yan1,2,3 1. Guangdong Juhua Printed Display Technology Co.LTD (China), 2. TCL Corporate Research (China), 3. TCL CSOT (China) |
| The flexible printed OLED TV display technology will be able to create new application market, such as rollable/foldable TV, in the future. It's TV Mobiles. In this paper, the panel performance of 31” 4K flexible printed OLED TV and the latest technology breakthroughs are discussed in details. | |
| OLED5-2
15:40 |
ViP Technology, a Photolithography Patterning Approach for High Performance AMOLED Display Yiming Xiao1, *Yuan Yao1, Zhendong Ding1, Zengqiang Xia1, Zhengkui Dong1, Bowen Yang1, Zhao Zu1, Xuejing Zhu1, Haohan Zhang1, Yongqiang Du1, Yuting Fu1, Liusong Ni1, Murong Xue1, Pengle Dang1, Yucheng Liu1, JY Lee1, C. C. Lee1, Ying Shen2, Xiujian Zhu2, Zhaoji Peng2, Deqiang Zhang2 1. Hefei Visionox Technology Co., Ltd. (China), 2. Visionox Technology Inc. (China) |
| ViP (Visionox intelligent Pixelization) Technology is an innovative pixelization technology without OLED Masks for RGB OLED patterning. Since being released in May 2023, rapid technical progress has been realized. In this paper, recent results on display performance and other advantages of ViP Technology will be discussed. | |
| OLED5-3
16:00 |
UV Stable High-Index Nanocomposite Formulations for Advanced Display Applications *Neil Pschirer1, Peter Guschl1, Nicole Tadros1, Aaron Krieg1, Serpil Gonen Williams1 1. Pixelligent Technologies (United States of America) |
| Pixelligent's High-Refractive Index (RI) products enable advanced optics for Extended Reality (XR) and OLED displays. PixJet and PixNIL, deliver RIs from 1.65 to 2.0 and are designed for Inkjet printing and/or Nanoimprint Lithography (NIL). This presentation will highlight the innovation behind the company's PixCor product, which combines high RI and optical clarity while dramatically improving UV stability. | |
| OLED5-4L
16:20 |
Enhanced Performance of Organic Transistor Memories Using Solution-Processed Organic Floating-Gate Layers *Yuting Shi1, Takashi Kobayashi1, Hiroyoshi Naito1,2, Takashi Nagase1 1. Osaka Metropolitan University (Japan), 2. Ritsumeikan University (Japan) |
| OFETs with floating-gate layers have garnered significant attention due to their ability to achieve good memory characteristics with a simple device configuration. Here, we demonstrate enhanced performances in OFET memories, including on/off ratio, retention time, and bending durability, by combining solution-processed organic floating-gate layers with vacuum-deposited organic semiconductors. |
OLED6: OLED Advanced Technologies
Special Topic of Interest on Artificial Intelligence and Smart Society
Dec. 6 9:00-10:20 Mid-sized Hall B
Chair: Ken-ichi Nakayama (Osaka Univ.)
Co-Chair: Takahisa Shimizu (NHK)
| OLED6-1
9:00 |
Invited Quantum Chemical Calculations and Multiscale Simulations for OLEDs *Hironori Kaji1 1. Kyoto University (Japan) |
| We have investigated organic light-emitting diodes (OLEDs) from the following four aspects: 1) in-silico molecular design of OLED emitters and device fabrications, 2) quantum chemical calculations, 3) multiscale simulations, and 4) NMR analysis. Here, we outline the overview and then discuss recent developments in 2) and 3). | |
| OLED6-2
9:20 |
Invited An Optical-Based 3-Axis Pressure Sensor with a Flexible Organic Imager *Tomoyuki Yokota1 1. The University of Tokyo (Japan) |
| We developed a thin and flexible sensor construction approach to realize detection of the 3-axis pressure distribution over a large area with a wide sensing range and high accuracy. The use of porous rubber as a pressure-sensitive modulator eliminates the need for thick focusing systems without sensitivity loss. Integrated with a thin-film backlight and imager, our sensor is only 1.5 mm thick and remains functional even ... | |
| OLED6-3
9:40 |
Invited AI-Enabled High-Throughput Analysis for OLED Materials Optimization *Wei Xu1, Han Chen1, Zeming Xia2, Ruifeng He2, Lan Ma1, Jingyao Song2 1. TCL AI Lab (Hong Kong), 2. Guangzhou China Ray Optoelectronic Materials Co. Ltd. (China) |
| In this work, we adopted a graph representation of organic molecules and developed a graph-based AI model to rapidly predict molecular properties of OLED materials. We conducted a high-throughput analysis using the rapid AI predictive model and discovered a particular functional group with a particular substitution pattern that can effectively lower frontier molecular orbital energies of our dopants without changing their emission color. | |
| OLED6-4
10:00 |
Invited Device Simulation for Machine-Learning Studies of Design and Characterization of Organic Light-Emitting Diodes Atsushi Okada1, Takayuki Kinoshita1, *Hiroyoshi Naito1,2 1. Osaka Metropolitan University (Japan), 2. Ritsumeikan University (Japan) |
| The paper explores the use of device simulation data for developing machine learning models to design and characterize organic light-emitting diodes (OLEDs) and quantum dot light-emitting diodes (QLEDs). This method significantly reduces the time needed for data accumulation while effectively determining electronic transport properties and optimizing device performance. |
FMC9/OLED7: OLED Manufacturing Technology
Dec. 6 13:30-14:50 Mid-sized Hall B
Chair: Tauto Nakanishi (JNC)
Co-Chair: Takahiro Komatsu (Canon)
| FMC9/OLED7-1
13:30 |
Invited Printed Light Film Manufactured via Roll-to-Roll Flexography *Whitney Gaynor1, George Burkhard1, Bang-Yan Liu1, Kyra Kurtz1, Michael Crump1, Brian Johns1, Eli Wolf1 1. Sinovia Technologies (United States of America) |
| Sinovia is using flexographic printing, a high-throughput roll-to-roll method used for packaging and paper products, to create bottom-emitting OLEDs roll-to-roll from start to finish, including patterning and encapsulation. This is enabled by our proprietary roll-to-roll printed transparent conductive film. Both challenges and opportunities arise when adapting traditional printing techniques to electronic applications. | |
| FMC9/OLED7-2
13:50 |
Invited Solution-Processed Ultra-High Barrier Film for Organic Electronics Through Vacuum UV Irradiation *He Sun1, Luyang Song1, Yoshiyuki Suzuri1 1. Yamagata University (Japan) |
| Our research demonstrates that solution-processed SiNx barrier films, optimized with PHPS and PDMS layers and enhanced by VUV irradiation, can rapidly achieve ultrahigh barrier performance of up to 1.6 x 10-5 g m-2 day-1, making them suitable for industrial production of advanced organic electronic devices. | |
| FMC9/OLED7-3
14:10 |
Photo-Patternable High Refractive Index Materials for Enhanced Light Extraction in Organic Light-Emitting Diodes *Yuki Takada1, Kang-Go Chung1, Kaori Shirato1, Kyosuke Yoda1, Yoshinori Kinoshita1, Yoshikazu Miyamoto1 1. JSR corporation (Japan) |
| Enhancing light extraction in organic light-emitting diodes (OLEDs) remains a significant opportunity for advancement, with one method being the introduction of high and low refractive index layers. This paper presents our advancements in photo-patternable HRI materials, which enable the fabrication of diverse pattern shapes under process conditions compatible with commercial manufacturing lines. | |
| FMC9/OLED7-4L
14:30 |
Anti-Sparkle Film Application for Display *Fumihisa Hanzawa1, S Matt Menke2, Mark Lu3, Sotaro Endo1 1. 3M Japan Innovation (Japan), 2. 3M Company (United States of America), 3. 3M Taiwan (Taiwan) |
| Display technology for Laptop/Tablet is shifting to OLED from LCD which has higher resolution and smaller pixel sizes. In this case, potential of sparkle issue as interference to AG surface, has been increased and become more acute problem. Anti-Sparkle Film (ASF) solution is proposed to reduce it with minimal impact to the image quality. |
PHp2/OLEDp1: QD Phosphors and Devices (1)
Special Topic of Interest on Quantum Dot Technologies
Dec. 4 13:20-14:40 Main Hall
| PHp2/OLEDp1-1L | Dual Color AC Tandem QDLED Fabricated Using Ink-Jet Printing *Young-Jae Ko1, Hyo-Bin Kim1, Jang-Kun Song1, Ha-Rim Jung1 1. Sungkyunkwan University (Korea) |
| This study introduces a novel method for creating full-color displays using inkjet-printed quantum dot light-emitting diodes (QD-LEDs) with dual-color subpixels (red-blue and green-blue). The devices can switch colors based on voltage polarity, while brightness is controlled by voltage intensity. This approach simplifies the patterning process and enhances electro-optical efficiency, offering a cost-effective solution for future display technologies. | |
| PHp2/OLEDp1-2L | Study of the Stability of Quantum Dot Material Using ALD Encapsulation at Above-Room Temperatures for Mini-LED Applications *Ya-Hsuan Chen1, Pei-Yu Chu2, Yan-Rou Wang3, Yun-Zhen Liu1, Chin-Cheng Weng4, Chen-Ling Tsai1, Yi-Ping Wang1 1. Ming Chi University of Technology (Taiwan), 2. Mediatek (Taiwan), 3. Advantech (Taiwan), 4. Industrial Technology Research Institute (Taiwan) |
| In automotive displays, the demand for a wide color gamut highlights the importance of Quantum Dot technology. This study examines quantum dots encapsulated with Atomic Layer Deposition by measuring photoluminescence at above-room temperatures. It compares peak shifts and analyzes how ALD improves quantum dot stability under high temperatures. | |
| PHp2/OLEDp1-3L | Polyetheramine Matrix Protected Perovskite Nanocrystals *Jeong Bin Park1, Yujin Choi1, Parani Sundararajan1, Jang-Kun Song1 1. SungKyunKwan University (Korea) |
| This study introduces polyetheramine as a polymer matrix for enhanced passivation of perovskite nanocrystals (PNCs), improving their stability and optical properties. Polyetheramine reduces aggregation and boosts passivation. Treated PNCs showed a 58% photoluminescence yield compared to 44% without matrix, with better particle separation in SEM images. These findings highlight its potential for perovskite-based LEDs. | |
| PHp2/OLEDp1-4L | Enhancing Light Outcoupling of Quantum-Dot Light-Emitting Diodes by Using a Nanoparticle Scattering Layer *Da Yeon Hyeong1, Chang Kyo Kim1, Honyeon Lee1 1. Soonchunhyang University (Korea) |
| This work aims to enhance the light extraction efficiency of quantum-dot light-emitting diode (QLED). We fabricated a light-scattering layer using a polymer—nanoparticle composite in a one-step process. By optimizing the distribution and scattering properties of nanoparticle, we improved outcoupling. Based on these experimental results, we will elucidate mechanisms for enhancing the light extraction efficiency of QLEDs. |
OLEDp2: OLED Device Technologies
Dec. 5 11:10-12:30 Main Hall
| OLEDp2-1 | Highly Efficient Solution-Processed Deep-Blue Organic Light-Emitting Diodes Based on Imidazole Derivatives *Siyang Liu1,2,3, Bryan Siu Ting Tam2, Fion Sze Yan Yeung2, Fangfang Niu3, Fanghao Ye1, Shiguo Li1, Jingcheng Jin1, Shou-Cheng Dong4,2, Guijun Li2,3 1. Shenzhen Institute of Information Technology (China), 2. The Hong Kong University of Science and Technology (Hong Kong), 3. Shenzhen University (China), 4. WISPO Advanced Materials (China) |
| A series of deep-blue solution-processable imidazole derivatives, BuCzI and BuCzI-PCN, were synthesized by employing 3,6-di-tert-butyl-carbazole at N1 position of imidazole. The solution-processed undoped OLEDs were fabricated with BuCzI and BuCzI-PCN as emitter achieved EQE of 3.38% and 2.75% with CIE of (0.15, 0.05) and (015, 0.11), respectively. | |
| OLEDp2-2 | Effect of H2O Evaporation Time and Al-Doping on the Synthesis of ZnO Nanoparticles for Inverted OLEDs *Hwan Jin Yoo1, Hyuna A Hwang1, Su Been Lee1, Chan-Jun Park1, Da Young Park1, Chang-Kyo Kim1, Dae Gyu Moon1 1. Soonchunhyang University (Korea) |
| We have developed an inverted OLED using ZnO nanoparticles. The evaporation time of H2O and the amount of Al doping were adjusted during the synthesis of the ZnO nanoparticles. A maximum current efficiency of 36.0 cd/A was achieved in the device with 2% Al-doped ZnO nanoparticles. | |
| OLEDp2-3 | Correlation between Charge Accumulation and Exciton-Polaron Quenching in Phosphorescent OLEDs With and Without Spontaneous Orientation Polarization in Emission Layer *Shotaro Nakano1, Yutaka Noguchi1 1. Meiji University (Japan) |
| The influences of spontaneous orientation polarization (SOP) in the emission layer (EML) of Ir complex-based organic light-emitting diodes on charge accumulation and exciton quenching properties have been investigated. We found that the SOP in EML can suppress exciton-polaron quenching. | |
| OLEDp2-4 | Analyzing Charge Behavior in Blue Organic Light Emitting Diodes under Operation by Electronic Sum-Frequency Generation Spectroscopy *Sayaka Kai1, Tatsuya Kaburagi1, Kazunori Morimoto1, Takayuki Miyamae1,2,3 1. Chiba University (Japan), 2. Molecular Chirality Research Center (Japan), 3. Soft Molecular Activation Research Center (Japan) |
| Organic light emitting diodes (OLEDs) are used in displays and other applications because of their advantages such as light weight, low power consumption, and high contrast. In this study, we investigate the charge behavior of blue OLEDs, which use triplet-triplet annihilation (TTA) as the emission mechanism, during operation using electronic sum-frequency generation (ESFG) spectroscopy. | |
| OLEDp2-5 | Green Organic Color-Conversion Media with Enhanced Performances Using Bulky Dopants *Bryan Siu Ting Tam1, Siyang Liu1, Shou-Cheng Dong1,2 1. Hong Kong University of Science and Technology (Hong Kong), 2. WISPO Advanced Materials (Suzhou) Co., Ltd (China) |
| Green color-conversion media (CCM) with enhanced photoluminescence and stability are developed using a perylene-based host and t-butyl modified DMQAs as the dopant. The resulting CCM films exhibited PLQY of 58% and near twice longer lifetime than the unsubstituted DMQA, while maintaining high blue light absorption of 99% with a 500 nm thickness. | |
| OLEDp2-6 | Degradation Properties of Alq3-Based Organic Light-Emitting Diodes with Dipolar Doping Hole Transport Layers *Mihiro Takeda1, Alexander Bruetting Hofmann2, Wolfgang Bruetting2, Yutaka Noguchi1 1. Meiji University (Japan), 2. University of Augsburg (Germany) |
| We investigated the degradation mechanism of Alq3-based organic light-emitting diodes with modified charge accumulation properties by “dipolar doping” in hole transport layers (HTLs). The results suggest that the excess accumulated holes induced at the HTL/emission layer interface due to spontaneous orientation polarization are not much involved in the degradation mechanism. | |
| OLEDp2-7 | Enhancement of Blue TADF OLED Stability through Reduction of Electron Trapping and Interface Charge Accumulation *Jung Ho Ham1, Young Hun Jung1, Byung Doo Chin2, Jang Hyuk Kwon1 1. Kyung Hee University (Korea), 2. Dankook University (Korea) |
| We report that causes of device degradation of blue thermally activated delayed fluorescence (TADF) devices are either electron trapping into dopants and electron accumulation at the interface of hole transport layer. Our TADF device achieved a maximum external quantum efficiency (EQEmax) of 27.6% and a 1.5-fold improvement in lifetime (LT90) at an initial luminance of 1000 cd/m2. | |
| OLEDp2-8 | Concentration Effects of Fluorescence Emitter in Deep Blue Organic Light Emitting Devices *Chi-Feng Lin1, Che-Yu Li1, Bo-Yen Lin2, Tien-Lung Chiu3, Ken-Tsung Wong4, Jiun-Haw Lee4 1. National United University (Taiwan), 2. National Dong Hwa University (Taiwan), 3. Yuan Ze University (Taiwan), 4. National Taiwan University (Taiwan) |
| In this report, we anthracene derivatives as the emitter to fabricate deep blue fluorescent OLEDs. By varying the doping concentration of the emitter in the emissive layer, we optimized the device efficiency and analysis the impact of emitter doping concentration on the electrical and optical properties of the devices. |
PHp4/OLEDp3: QD Phosphors and Devices (2)
Special Topic of Interest on Quantum Dot Technologies
Dec. 5 11:10-12:30 Main Hall
| PHp4/OLEDp3-1 | Effect of Shell Growth Temperature on Synthesis Green Ag-In-Ga-S/AgGaS2 Quantum Dot *Jinseop Yoon1, Jinchul Park1, Kangwoo Lee1, Boram Kim1, Mina Kim1, Yonghyeok Choi1, Eunjoo Jang1, Heeyeop Chae1 1. Sungkyunkwan University (Korea) |
| AgInGaS2/AgGaS2 quantum dots (QDs) were synthesized, exhibiting a photoluminescence quantum yield (PLQY) of 67% and a full width at half maximum (FWHM) of 37 nm at 535 nm in this work. The AgGaS2 shell was uniformly grown by controlling the cation exchange reaction between the In atoms in the core and Ga precursor through adjusting the shell growth temperature. | |
| PHp4/OLEDp3-2 | Synthesis Blue Emissive Te-doped ZnSe Quantum Dots by Controlling Se Precursor Reactivity *Jinchul Park1, Boram Kim1, Yonghyeok Choi1, Kangwoo Lee1, Mina Kim1, Eunjoo Jang1, Heeyeop Chae1 1. Sungkyunkwan University (Korea) |
| ZnTeSe@ZnSe/ZnS quantum dots have been synthesized and demonstrated 80% photoluminescence quantum yield with photoluminescence emission at 435 nm in this work. ZnTeSe core with a diameter of 4 nm was synthesized uniformly and the reactivity of the Se precursor was controlled by adding diphenylphosphine at ZnSe shell growth stage, resulting in uniform growth of ZnSe shell with thickness of 1.5 nm. | |
| PHp4/OLEDp3-3 | Modulation of Shell Structure for Green Emission Quantum Dot Color Converter Film *Liguo Chen1, Chengjian Liu1, Ran Zhang1, Wencan Deng1, Binqian Zhou1,4, Yu Zhou1, Hua Xiao2, Xijian Duan3, Chengcheng Li3, Haochen Liu5, Haodong Tang1, Jiaji Cheng4, Yulong Chen1, Junjie Hao1 1. Shenzhen Technology University (China), 2. Guangdong Ocean University (China), 3. Southern University of Science and Technology (China), 4. Hubei University (China), 5. City University of Hong Kong (China) |
| We present a novel synthesis method for green emission CdSe/CdS quantum dots (QDs), which exhibit excellent blue light conversion efficiency. Compared with traditional green emitting alloy QDs, the mass light conversion efficiency can be improved by 16 times. This achievement will lay the foundation for the realization of full-color Micro-LED. | |
| PHp4/OLEDp3-4 | Small-Sized CsPbBr3 Perovskite Quantum Dots for Pure Blue LEDs *Yuna Igarashi1, Takayuki Chiba1 1. Yamagata university (Japan) |
| Lead halide perovskite quantum dots (PeQDs) are promising materials for solution-processed light-emitting devices due to their high photoluminescence quantum yield (PLQY). This study focuses on the synthesis of small-sized CsPbBr3 PeQDs to achieve pure blue emission. By optimizing condition during synthesis, we obtained a high colloidal ink concentration and successfully fabricated a thin film. | |
| PHp4/OLEDp3-5 | Concentration-Dependent Photoluminescence of CsPbX3 Perovskite Nanocrystals for Wide-Color Gamut Display Hangyu He1, Fanghao Ye1, Guoliang Zhuang1, Fion Sze Yan Yeung2, *Guijun LI1 1. Shenzhen University (China), 2. The Hong Kong University of Science and Technology (Hong Kong) |
| Here, we find that the regulation of the concentration of perovskite nanocrystals dispersion affects its PL spectrum, especially the linewidth. A proper concentration narrows the full width at half-maximum (FWHM) of the red, green and blue primary color spectra to 25 nm, 20 nm and 14 nm, respectively, which covers ∼91% Rec. 2020 standard in the CIE 1931 color space. | |
| PHp4/OLEDp3-6 | Colloidal Quantum Dot Patterning using Plasma-Induced Ligand Polymerization and Argon Sputter Etching *Boram Kim1, Mina Kim1, Kangwoo Lee1, Jinseop Yoon1 1. Sungkyunkwan University (Korea) |
| Quantum dot (QD) ligands were cross-linked by Ar plasma to form QD films, and the cross-linked QDs were patterned by Ar sputter etching in this work. The cross-linked ligands were confirmed by Fourier-transform infrared spectroscopy. In the next step, 50μm patterns were fabricated with argon sputter etching processes with shadow masks. This patterning process is expected to offer a non-destructive solution for the fabrication of ... | |
| PHp4/OLEDp3-7 | Characteristics of Quantum-dot Light-Emitting Diodes Exchanged Organic Ligands by Metal Salts *Jimin Lee1, Honyeon Lee1, Chang Kyo Kim1 1. Soonchunhyang University (Korea) |
| We studied the device characteristics of quantum-dot light-emitting diodes (QLEDs) with organic ligands replaced by inorganic metal salts. Using metal salts and polar solvents, we successfully substituted the organic ligands on the quantum dot surface with inorganic ligands, resulting in a significant improvement in device performance. |
OLEDp4: OLED Manufacturing
Dec. 6 11:10-12:30 Main Hall
| OLEDp4-1 | Microlens Array Imprinted Liquid Crystal Droplet Layer for Improving Out-Coupling Light Efficiency of OLED *Seongmin Lim1, Hyeon-Sik Ahn1, Eun-Jeong Jang1, Yoonseuk Choi1 1. Hanbat Nationatl University (Korea) |
| In this research, we demonstrate a polymer dispersed liquid crystal (PDLC) imprinted microlens array (MLA) via a solution process to improve the out-coupling light efficiency of organic light emitting diode (OLED). MLA and PDLC are excellent technologies for enhancing the out-coupling light efficiency of OLED. The MLA imprinted PDLC applied to OLED improves out-coupling light efficiency by about 22% compared to reference OLED. | |
| OLEDp4-2 | Enhancing OLED Optical Characteristics Through Simple Fabrication of High Aspect Ratio Nanostructures Based on Photosensitive Photopolymer for External Light Extraction *Geun Su Choi1,2, Eun Jeong Bae1,2, Young Hwan Yu2, Tae Jeong Hwang2, Byeong-Kwon Ju1, Young Wook Park2 1. University of Korea (Korea), 2. University of Sunmoon (Korea) |
| This study explores the enhancement of light extraction efficiency in OLEDs using nano-random structures with controlled bottom unetched layers. Compared to micro-lens arrays, the nano-random structures showed improved viewing angles and effective light extraction in both green and blue OLEDs, especially in blue OLEDs, demonstrating broader applicability across emission spectra. | |
| OLEDp4-3 | Enhanced Performance of Laminated OLEDs Through Solution Processing Techniques Cheol-Hee Moon1, *DongHeon Yoo1 1. Hoseo University (Korea) |
| This study reports on an vacuum-less laminating OLED device that achieves a luminance of 10419 cd/m2 by doping the electron transport material PBD into the PPV emissive material to enhance electron mobility and using thermally stable D-sorbitol as the adhesive layer material for efficient electron injection into the emissive layer. | |
| OLEDp4-4 | The Position of Polarizer Effetcs The Reliability of Flexible Display *Bolin Lei1, Yingying Rang1, Yakun Liu1, Weilong Li1, Yong Wu1 1. Visionox Technology Co.,Ltd (China) |
| The POL's structure determines that it is not resistant to high temperature and high humidity environment, will lose polarization characteristics, and will shrink along the absorption axis, in the contraction process will lead to the lower mask layer pulling, peeling between the membrane layers, leading to module reliability abnormalities, display or TP function failure. We need to consider the effect of POL location when designing | |
| OLEDp4-5L | Textile-Based Wavelength-Tunable OLEDs Fabricated via a Simple Planarization Method for Applications *Youjin Cho1, Seojin Kim1, Chaeyeong Lee1, Dong Gyun Kim1, Ye Ji Shin1, Minseong Park1, Youngwoo Kim1, Won Woo Lee1, Eou-Sik Cho1, Sang Jik Kwon1, Yongmin Jeon1 1. Gachon University (Korea) |
| We optimized textiles using ultra-thin film transfer technology to create stackable bottom-emitting OLEDs. This allows for wavelength-tunable control by AC driving of blue (470 nm), red (630 nm), and white (470-630 nm) light through a simple planarization method. This research paves the way for advancements in wearable optical medicine and displays. | |
| OLEDp4-6L | Mitigating Early Degradation in Solution-Processed OLEDs Through Interfacial Charge Management *Nargis Ali1, Thi Na Le1, Yongsup Park1, Min Chul Suh1 1. Kyung Hee University (Korea) |
| The incorporation of dETL facilitated the increased exciton recombination resulting in a 133% improvement in efficiency and a 300% increase in device lifetime (LT95). Moreover, degradation in the emitting layer was diminished by changing the degradation zone to the dETL, as confirmed by laser desorption/ionization-time of flight (LDI-TOF) analysis. | |
| OLEDp4-7L | Enhanced Charge Injection and Transport Using Metal Oxide Layers in Organic Light-Emitting Diodes *Seong Ho Baeg1, Jang-Kun Song1 1. Sungkyunkwan University (Korea) |
| This study explores the use of tin oxide (SnO2) and zinc oxide (ZnO) as electron injection layers (EILs) in OLEDs, comparing them to lithium fluoride (LiF). Devices with metal oxide EILs show improved electronic and optical properties, better charge injection, lower turn-on voltage, enhanced J-V-L characteristics, and higher external quantum efficiency (EQE), leading to longer device lifetimes. |
FLXp2/OLEDp5: Devices and Materials for Flexible OLED
Dec. 6 13:50-15:10 Main Hall
| FLXp2/OLEDp5-1 | Study on Mechanical Properties of AMOLED Stretchable-Display *Jinyan Huang1, Min Zhang2, Huanhuan Zhang2, Zhimin Yan2, Wangfeng Xi3, Rubo Xing3 1. Hefei Visionox Technology Co., LTD. (China), 2. Yungu (Gu'an) Technology Co., LTD. (China), 3. Kunshan Govisionox Optolelectronics Co., LTD. (China) |
| This paper mainly discusses the stripping problems encountered in the module production process of the stretchable display module, and optimizing the stress state of the wire during the stretching of the display module by improving the module laminated structure and module material. The process route of the stretchable display is opened up, and the stretchable display has good reliability with the opening process route. | |
| FLXp2/OLEDp5-2L | Core Technologies for Stretchable AMOLED with High Resolution & Stretchability *MunPyo Hong1, Jaewan Park1, Donghoon Kim1, Sooseong Lee1, Youngku Jin1, Gerhard Domann2, Daniela Collin2 1. Korea University (Korea), 2. Fraunhofer-Institute for Silicate Research (Germany) |
| This study presents core technologies to simultaneously improve stretchability and resolution. Firstly, we utilized photocurable hybrid capping material and stoichiometric Si3N4 thin film for advanced pixelized encapsulation. Secondly, for elastic metal electrode, we achieved fine patterning of a three-layer, composed of superelastic metal NiTi and low-resistance Al thin film, through dry etching at a substrate temperature below 50°C. | |
| FLXp2/OLEDp5-3L | Low-Voltage Upconversion Inverted Organic Light-Emitting Diodes Using Soluble Fullerene Derivatives *Kazuki Kojima1, Moeto Okuda1, Takashi Kobayashi1, Hiroyoshi Naito2, Takashi Nagase1 1. Osaka Metropolitan University (Japan), 2. Ritsumeikan University (Japan) |
| In recent years, organic light-emitting diodes (OLEDs) using the upconversion (UC) process mediated by triplet-triplet annihilation (TTA) have attracted increasing interest. In this study, we fabricated inverted OLEDs using soluble fullerene derivatives with different alkyl chain structures for acceptor layers and found that the alkyl chains at the interface facilitate efficient TTA-UC emission. |
Workshop on 3D/Hyper-Realistic Displays and Systems
| Dec. 4 | 16:40-18:00 | Room 108 | VHF2/3D1 | Ergonomics of Virtual Images |
| Dec. 5 | 9:00-10:00 | Small Hall | 3D2 | Holography |
| Dec. 5 | 10:50-12:10 | Small Hall | 3D3 | Emerging Technologies for 3D/Hyper-Realistic Display |
| Dec. 5 | 13:30-14:50 | Room 206 | MVS3/3D4 | Metaverse System and World |
| Dec. 5 | 15:20-16:20 | Room 204 | PRJ6/3D5 | Automotive Projection Display |
| Dec. 5 | 17:10-18:30 | Room 204 | PRJ7/3D6 | Aerial Display |
| Dec. 6 | 10:50-12:10 | Room 204 | MVS6/PRJ9/3D7 | Metaverse Technologies for Automotive |
| Dec. 6 | 13:30-14:50 | Room 204 | 3D8/MVS7 | 3D Systems for AR/VR |
| Dec. 4 | 13:20-14:40 | Main Hall | 3Dp1 | Emerging Technologies for 3D/Hyper-Realistic Display (1) |
| Dec. 4 | 15:10-16:30 | Main Hall | 3Dp2 | Emerging Technologies for 3D/Hyper-Realistic Display (2) |
VHF2/3D1: Ergonomics of Virtual Images
Dec. 4 16:40-18:00 Room 108
Chair: Hiroyasu Ujike (Tokyo Information Design Professional University)
Co-Chair: Sumio Yano (Shimane University)
| VHF2/3D1-1
16:40 |
Effects of HMD Optics and Human Visual Perceptual Function on Object Size Perception *Neiju Matsubara1, Shin Tabeta2, Eri Yonemoto1, Shigehito Tanahashi1 1. Niigata University (Japan), 2. Hokuriku University (Japan) |
| This study uses two experiments to clarify the cause of the difference between the apparent size of visual objects in VR space and that in real space. As a result, the cause was basically effects of human visual perceptual function, and depending on type of HMD, effects of HMD optics was also a cause in addition. | |
| VHF2/3D1-2
17:00 |
Comparison of Pseudo-3D Perception Between Aerial Image and Non-Aerial Image *Kenta Saito1, Haruki Mizushina1,2, Munekazu Date3, Kenji Yamamoto1 1. Tokushima University (Japan), 2. Shinshu University (Japan), 3. Tokushima Bunri University (Japan) |
| In this study, we evaluate whether the pseudo-3D perception is increased by displaying a 2D aerial image, by comparing the pseudo-3D perception of an image displayed on a 2D display with that of a 2D aerial image. | |
| VHF2/3D1-3
17:20 |
Evaluating the Performance of Dihedral Corner Reflector Array-Based Floating Displays Che-Wei Lee1, Zhong-Yong Lin1, Pei-Jung Wu2, *Chih-Hao Chuang1 1. Feng Chia University (Taiwan), 2. National Taichung University of Science and Technology (Taiwan) |
| This study explores dihedral corner reflector arrays (DCRA) for floating display technology, assessing aerial height and viewing angles. It quantifies image quality, illuminance, and distortion, enhancing the adoption of floating displays in various applications. | |
| VHF2/3D1-4L
17:40 |
Color Matching in Augmented Reality under Aligned Conditions *Wei Li1, Midori Tanaka1, Takahiko Horiuchi1 1. Chiba University (Japan) |
| A color matching experiment was conducted to investigate color appearance characteristics in a simulated augmented reality (AR) environment. We found that with stimuli strictly aligned, observers’ matches are generally unaffected by AR-induced color deviation observed in prior research, regardless of hue or foreground luminance. |
3D2: Holography
Dec. 5 9:00-10:00 Small Hall
Chair: Yasuhiro Takaki (Tokyo University of Agriculture and Technology)
Co-Chair: Yoshitomo Isomae (Sony Semiconductor Solutions)
| 3D2-1
9:00 |
A Head-Mounted Display with Holographic Pancake Optics *Shih-Siang Chu1, Ching-Shun Yang1, Jui-Wen Pan1 1. National Yang Ming Chiao Tung University (Taiwan) |
| A design for a head-mounted display using holographic optical elements and pancake optics is presented. Use the HOE and pancake optics to reduce the volume of the system. For this design, the effective focal length was 10.901 mm, the field of view was 30 degrees, and the f-number was 3.633. | |
| 3D2-2
9:20 |
Light Field Holography Using Fourier Slice *Sen Liu1, Wenqi Wang1, Jun Xia1 1. Southeast University (China) |
| We propose a light field hologram generation algorithm based on Fourier slice theory. This algorithm uses Fourier slices to reform the light field images into a naturally continuous autofocusing images in three dimensional space. Then, by employing Stochastic Gradient Descent (SGD), we calculate the phase-only hologram based on diffraction propagation. Our experiment shows that a light field hologram is demonstrated with authentic defocus blur effects. | |
| 3D2-3L
9:40 |
Numerical and Optical Reconstruction Simulation for Holographic 3D Display *Ryo Higashida1, Masato Miura1, Teruyoshi Nobukawa1, Yuta Yamaguchi1, Ken-ichi Aoshima1, Nobuhiko Funabashi1, Masahiro Yamaguchi2 1. Japan Broadcasting Corporation (NHK) (Japan), 2. Institute of Science Tokyo (Japan) |
| This paper presents numerical and optical simulations for future high-performance holographic 3D displays. In the numerical simulation, we introduced a normalization method using a white plate and a comparison method with an image calculated from point spread functions for a quality assessment. In the optical simulation, we proposed a method for high-precision printing of large, submicrometer-scale patterns through laser lithography and reactive ion etching. |
3D3: Emerging Technologies for 3D/Hyper-Realistic Display
Dec. 5 10:50-12:10 Small Hall
Chair: Takafumi Koike (Hosei Univ.)
Co-Chair: Kazuhiro Yamaguchi (Suwa Univ. Sci.)
| 3D3-1
10:50 |
Integral 3D Display with Enhanced Pixel-Density and Viewing-Zone-Angle Using 2D Image Time-Division Multiplexing and Eye-Tracking Technologies *Hayato Watanabe1, Naoto Okaichi1, Masanori Kano1, Hisayuki Sasaki1, Jun Arai1 1. Japan Broadcasting Corporation (NHK) (Japan) |
| We propose an integral three-dimensional (3D) display capable of presenting 3D images with enhanced maximum pixel density and viewing zone angle using time-division multiplexing and eye-tracking technologies. We developed a prototype display system and demonstrated the effectiveness of the proposed method through display experiments. | |
| 3D3-2
11:10 |
3D Modeling Method from ToF Camera Using Reflection Intensity *Shuto Ogura1, Toshihide Kobayashi3, Atsushi Suzuki3, Ryosuke Nakagoshi3, Haruki Mizushina1,2, Kenji Yamamoto1 1. Tokushima University (Japan), 2. Shinshu University (Japan), 3. JVCKENWOOD Corporation (Japan) |
| We propose an algorithm to remove flying pixels from the 3D point cloud captured by ToF cameras. The algorithm includes linear approximation and light reflection intensity. In addition, we propose a smoothing algorithm combining region segmentation and planar approximation to reduce wave-shaped errors. | |
| 3D3-3
11:30 |
Portable Interactive 3D Display System Using Remote Rendering *Masanori Kano1, Naoto Okaichi1, Jun Arai1 1. Japan Broadcasting Corporation (NHK) (Japan) |
| We developed a portable interactive 3D display system using remote rendering. This system comprises a portable device with a lens array, server, and wireless LAN router. The portable device captures the viewing position and actions of the viewer, and the server uses this information to generate a multi-view image (MVI). Thereafter, the MVI is used to create an elemental image array, which is displayed as ... | |
| 3D3-4
11:50 |
Moiré Reduction by Modifying Aperture Shape in Light Field Display with Near Virtual-Image Mode *Koichiro Fukano1, Toshiki Yura2, Yasuhiro Takaki1 1. Tokyo University of Agriculture and Technology (Japan), 2. PHOTRON LIMITED. (Japan) |
| We propose a method to suppress moiré patterns in the light field display with near virtual-image mode by using a sophisticated aperture shape. By reshaping the pixel shapes with the aperture, the differences in pixel shapes and intensity are moderated. Computer simulations and experiments were conducted to validate the proposed technique. |
MVS3/3D4: Metaverse System and World
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 5 13:30-14:50 Room 206
Chair: Kenji Yamamoto (Tokushima University)
Co-Chair: Hayato Watanabe (NHK)
| MVS3/3D4-1
13:30 |
Invited Research and Development of Real and Cyber Fusion to Achieve “Project Metaverse” for Well-being Society *Hiroshi Chigira1 1. NTT Corporation (Japan) |
| In this paper, toward our goal of “Project Metaverse” to directly apply experiences on a metaverse to the real world, we present our recent research activities, such as; 1)TENGUN Ogijima, a point cloud based metaverse achieved by LiDAR data and vibro-tactile recording. 2) XR display technologies, such as Mirror Transcending Aerial Imaging(MiTAI), and Glasses-Free “AISEKI” XR system. | |
| MVS3/3D4-2
13:50 |
Metaverse for Everyone: Open-Source Web-Based Metaverse System Chutvrc *Kenichiro Ito1, Yong-Hao Hu1 1. The University of Tokyo (Japan) |
| This study proposes a web-based open-source metaverse software “chutvrc.” As a successor to Mozilla Hubs, it aims for high extensibility and customizability, targeting general-purpose use similar to standard websites. Aimed to be accessed from various devices and display environments, including VR equipment, PCs, smartphones, and tablets, it enables the metaverse with interconnectivity and interoperability. | |
| MVS3/3D4-3
14:10 |
Invited Implementation of Interactive Mirror-Transcending Aerial Imaging System *Motohiro Makiguchi1 1. NTT Corporation (Japan) |
| Many methods have been proposed for presenting digital information in mirror space. However, most existing methods can only display digital information in mirror space. This paper introduces the concept and implementation of MiTAI (Mirror-Transcending Aerial Imaging), which allows for the continuous movement of digital information between mirrors and physical space. | |
| MVS3/3D4-4
14:30 |
Invited Optimizing Illumination Spectrum for Enhanced Spectral Color Appearance Control *Mariko Yamaguchi1 1. NTT Corporation (Japan) |
| We have developed an innovative lighting system that changes specific target colors while maintaining a natural white appearance, by using implementing precisely spectral controlling of the spectral power distribution of illumination and metamerism. It was successfully showcased at the Paris Fashion Week 2024 Spring/Summer. |
PRJ6/3D5: Automotive Projection Display
Special Topic of Interest on Automotive Displays
Dec. 5 15:20-16:20 Room 204
Chair: Kazuhiro Ohara (Visitech)
Co-Chair: Haruki Mizushina (Tokushima University)
| PRJ6/3D5-1
15:20 |
Invited High Image Quality Computer-Generated Holography Display Based on 4K Amplitude Modulating LCoS *Darran Francis Milne1, Christian Fieldhouse1, Mark Brannan1, Simon Chandler1, Indi Pritchard1, Alfred Newman1 1. VividQ Limited (UK) |
| We present a novel fast CGH algorithm and projector design, based on amplitude modulation and incoherent LED illumination. This design provides significant improvements in image quality, contrast and computational efficiency over iterative phase-only methods and provides a realistic route to the use of CGH within applications such as virtual reality and automotive Heads Up Display. | |
| PRJ6/3D5-2
15:40 |
Invited Optical Technology Development for Head-Up Display *Keiji Sugiyama1, Ken'ichi Kasazumi 1, Kosuke Imawaka1, Satoshi Kuzuhara2, Yosuke Asai2 1. Panasonic Automotive Systems Co., Ltd. (Japan), 2. Panasonic Holdings Corporation (Japan) |
| We has been developing optical technologies for Head Up Display (HUD). For HUD, it is important to realize large image in small package size. But, large image size and small package size are generally contradictory. In this paper, we describe Panasonic optical technologies for conventional mirror HUD and discuss the possibility of advanced future HUD. | |
| PRJ6/3D5-3
16:00 |
Novel Vehicular Glazing Displays Enabled by Optic-Clear Emissive Projection Screen *Ted Sun1, Minghua Zhu1 1. Sun Innovations Inc. (United States of America) |
| A novel emissive projection display (EPD) was developed, which comprises a fully transparent screen made of RGB emissive nanomaterials and a blue-light digital image projector. We will discuss recent advances on EPD, including full color rendition on an optic-clear emissive screen without tri-color phosphors pixelation, extremely bright and stable emissive screen materials, and various new vehicle display applications. |
PRJ7/3D6: Aerial Display
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 5 17:10-18:30 Room 204
Chair: Toshiyuki Amano (Wakayama University)
Co-Chair: Mariko Yamaguchi (NTT)
| PRJ7/3D6-1
17:10 |
Evaluation of Image Quality Improvement for Design of Image Processing for Sharpening Aerial Display *Hayato Kikuta1,2, Shiro Suyama2, Hirotsugu Yamamoto2 1. Mitsubishi Electric Corp. (Japan), 2. Utsunomiya University (Japan) |
| We develop an aerial display system that features an image pre-processing that suppresses degradation of image quality of aerial images caused by diffraction by retro-reflector. Furthermore, we propose a verification method to quantitatively express the effect of image quality improvement using the sharpness of aerial images as the evaluation axis for evaluation of product applicability. | |
| PRJ7/3D6-2
17:30 |
Outdoor Aerial LED Signage Formed With AIRR by Use of Fresnel Lens *Shinya Sakane1,2, Koji Yoshikawa2, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan), 2. Seiwa Electric Mfg. Co., Ltd. (Japan) |
| We have developed an aerial LED display that meets outdoor brightness standards. We report on the results of an experiment using this device to see if an aerial LED sign can actually be seen outdoors. | |
| PRJ7/3D6-3
17:50 |
Cylindrical Aerial Display Viewable From 360-Degrees Using Aerial Imaging by Retro-Reflection *Masaki Aihara1, Kengo Fujii1, Tomohiro Yendo1 1. Nagaoka Univ. Tech. (Japan) |
| The purpose of this research is to realize cylindrical aerial display with all around view using AIRR. The proposed display rotates the basic AIRR structure at high speed and displayed aerial images in a cylindrical shape by the afterimage effect. We confirmed through the simulation and the actual machine that the proposed method can display an aerial image visible from all around. | |
| PRJ7/3D6-4
18:10 |
Bidirectional Rotation Perception of Dark Hole on Curved Surface due to View Position in Depth-Fused 3D Display *Takahiro Omoto1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan) |
| We propose bidirectional rotation perception system by using depth-fused 3D (DFD) image of dark hole on curved surface. The concave DFD image can provide positive rotation perception in the direction of viewpoint motion. The convex DFD image can provide negative rotation perception in the opposite direction of viewpoint motion. |
MVS6/PRJ9/3D7: Metaverse Technologies for Automotive
Special Topic of Interest on Automotive Displays
Dec. 6 10:50-12:10 Room 204
Chair: Satoshi Ouchi (Hitachi)
Co-Chair: Kazuhiro Ohara (Visitech)
| MVS6/PRJ9/3D7-1
10:50 |
Invited Recent Developments of Holographic Contact Lens Display *Yasuhiro Takaki1 1. Tokyo University of Agriculture and Technology (Japan) |
| Smart contact lenses, particularly those equipped for AR visual interface devices, have garnered considerable interest. Recently, the contact lens display using the holographic image generation technique has been proposed. This paper outlines recent developments in holographic contact lens displays and also introduces a new integrated camera technique. | |
| MVS6/PRJ9/3D7-2
11:10 |
Development of Optical System for Slim Design Headlights *Tomohide Morimoto1, Masashige Suwa1 1. Mitsubishi Electric (Japan) |
| Development of automobile headlights is important for not only safety, but also design of cars. Recently, we have developed RIR optical system and achieved thin design headlights. Here, we report the new optical system for slim design headlights with high light use efficiency. | |
| MVS6/PRJ9/3D7-3
11:30 |
New Optical Design of HUD Using Mirror Array Vision Extender *Chunmin Chen1, Miya Fang1 1. Shinyoptics Corp. (Taiwan) |
| A novel optical structure, mirror array vision extender (MAVE), is proposed to solve volume issue of head up display (HUD). This pioneering design, which employs a mirror array to extend the vertical field of view (FOV) and reduce the vertical dimension of HUD. In this design, we use 3 mirrors to prove the capability of this optical architecture. | |
| MVS6/PRJ9/3D7-4
11:50 |
Optimized Rectificaiton by Using Original Lens Projection for Fisheye Stereo Cameras *Hisayoshi Kaneda1, Kazusyohi Yamazaki1 1. Hitachi, Ltd (Japan) |
| We developed a novel method for optimizing stereo vision in fisheye lens cameras. This method uses the original lens projection for image rectification, resulting in a 50% reduction in the rectified image size of a 120° wide angle stereo camera from the perspective projection. Its reduction helps conserve memory capacity, providing a significant advantage in resource-limited environments like in-vehicle systems. |
3D8/MVS7: 3D Systems for AR/VR
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 6 13:30-14:50 Room 204
Chair: Toshiaki Fujii (Nagoya Univ.)
Co-Chair: Nobuyuki Hashimoto (Japan Women's Univ.)
| 3D8/MVS7-1
13:30 |
Design of High-Performance Curved Waveguide Display Based on Freeform Polarization Volume Holograms *Jiacheng Weng1, Chunyang Pei1, Haifeng Li1, Rengmao Wu1, Xu Liu1 1. Zhejiang University (China) |
| Nowadays, waveguide displays are considered one of the most promising augmented reality solutions. Here, we propose a curved waveguide scheme using freeform polarization volume holograms as couplers. This scheme can accurately correct the aberrations of the curved waveguide and is easy to prepare. The designed systems with 1D/2D exit pupil expansion are demonstrated, achieving high-resolution display with a wide field of view and large ... | |
| 3D8/MVS7-2
13:50 |
Using Freeform Holographic Optical Elements to Optimize Free-Focusing AR Eyeglass Design *Rui Tan1, Qi Liu1, Haozhe Cui1, Muhamad Affiq Bin Misran1, Reiji Hattori1 1. Kyushu University (Japan) |
| Recent AR advancements heighten interest in head-mounted displays, but field of view (FOV) and eye box size remain challenges. This paper proposes freeform Holographic Optical Elements (HOEs) and optimized optical designs to develop AR eyeglasses with enhanced eye box mobility and an expanded FOV. | |
| 3D8/MVS7-3
14:10 |
Design of Lens-Array-Based Compact VR Optical Systems *Muhamad Affiq Bin Misran1, Kento Matsuo1,2, Rui Tan1, Qi Liu1, Yuji Teshima2, Reiji Hattori1 1. Kyushu University (Japan), 2. NIT, Sasebo College (Japan) |
| The proposed new optical system for VR devices using the lens array is lightweight and thin and can also achieve a wide viewing angle including eye rotation by using a flexible display. It is also shown that the boundaries between lenses can be hidden by making their width smaller than the pupil diameter. | |
| 3D8/MVS7-4
14:30 |
Visual Perception of Depth in Virtual Images Produced by Convex Lens *Sumio Yano1,2, Takumi Uemura3, Shuichi Ojima3 1. Shimane University (Japan), 2. RITECS Inc. (Japan), 3. Sojo University (Japan) |
| Monocular perception of depth distance to real objects and to virtual images created with a convex lens was investigated. Depth distance was underestimated for both real objects and virtual images. However, depth perception of virtual images increased with increasing distance, as did perceived depth and depth distance calculated from the ocular accommodation response. |
3Dp1: Emerging Technologies for 3D/Hyper-Realistic Display (1)
Dec. 4 13:20-14:40 Main Hall
| 3Dp1-1L | Phase Matching in Spatial Light Modulator for Holographic Contact Lens Display *Yasuhiro Takaki1, Youjia Gu1 1. Tokyo University of Agriculture and Technology (Japan) |
| The holographic contact lens display yields an ultra-thin AR form factor, which employs a transmission-type phase-only spatial light modulator (SLM). This study explores a pixel structure that is suitable for the SLM to yield good see-through characteristics. The phase matching condition was derived through theoretical analysis, and the computer simulations were performed to examine phase matching. | |
| 3Dp1-2L | Introductory Comparison Between Gerchberg-Saxton Method and Complete Survey Method in Optimizing Binary Computer Generated Hologram *Yusuke Sando1, Yutaro Goto1 1. Osaka Research Institute of Industrial Science and Technology (Japan) |
| In binary computer-generated hologram, the optimization processing is inevitable to reduce coding error. Although Gerchberg-Saxton (GS) method is a powerful tool, the optimized pattern might be trapped in local minimum solutions. This paper presents an introductory comparison of the GS method with the completely optimized pattern obtained by the complete survey method. | |
| 3Dp1-3L | Meshlet-Based Efficient Elemental Image Generation for Coarse Integral Imaging *Hiroto Omori1, Hideki Kakeya1 1. University of Tsukuba (Japan) |
| A fine interleaved Fresnel lens array has been proposed to improve image continuity in coarse integral imaging. However, a finer pitch increases the number of elemental lenses, significantly raising the computational load required to generate elemental images. This paper proposes a method for efficiently generating elemental images by using meshlet culling. | |
| 3Dp1-4L | Conversion from Amplitude Hologram to Complex Hologram Using Deep Learning *Takuya Hirahara1, Fan Wang1, Tomoyoshi Ito1, Tomoyoshi Shimobaba1 1. Chiba University (Japan) |
| The ideal hologram generation would have lowcomputational requirements and no conjugate light in thereproduced image. To accomplish both requirements, weconvert amplitude holograms to complex holograms usingdeep learning. As a result, we achieved both a reductionin computation time and conjugate light. | |
| 3Dp1-5L | An Autostereoscopic Display with Time-Multiplexed Directional Backlight Using a Fine-Pitch Interleaved Linear Fresnel Lens Array *Riku Shiobara1, Hideki Kakeya1 1. University of Tsukuba (Japan) |
| We propose an autostereoscopic display with a directional backlight unit using a fine-pitch interleaved linear Fresnel lens array. In the proposed method, crosstalk level is reduced approximately by half. | |
| 3Dp1-6L | Real-Time Electroholography Based on Binary-Weighted Computer-Generated Holograms with Heterogeneous Multi-GPU Cluster System *Haruka Doi1, Yuuka Narishima2, Naoki Takada1 1. Kochi University (Japan), 2. Mitsubishi Electric Software Corporation (Japan) |
| We report a real-time electroholography based on binary-weighted computer-generated holograms (BW-CGHs). We implemented the algorithm to reduce the number of the trigonometric function calculations on a heterogeneous multi-GPU cluster system. Finally, we realized a real-time reconstruction of a 3D video with eight gradations comprising about 1,120,000 points at 40 fps. | |
| 3Dp1-7L | Enhancing the Visibility of String-Based Directional Volumetric Displays *Kazuki Kamizuru1, Takashi Nishitsuji2, Hirotaka Nakayama3, Tomoyoshi Ito1, Tomoyoshi Shimobaba1, Atsushi Shiraki1 1. Chiba University (Japan), 2. Toho University (Japan), 3. National Astronomical Observatory of Japan (Japan) |
| Conventional string-based directional volumetric displays allow for observation from various angles other than directly above the display. However, due to the visibility characteristics of the strings, images displayed in the diagonal up and down directions often suffer from noise, which degrades the visibility of the original image. Therefore, this study aims to improve visibility in these diagonal directions by enhancing voxel calculation methods. | |
| 3Dp1-8L | Enhancing Image Quality in Directional Volumetric Displays with a 3D Super-Resolution Convolutional Neural Network *Seigou Takeshita1, Takashi Nishituji2, Hirotaka Nakayama3, Tomoyoshi Shimobaba1, Tomoyoshi Ito1, Atushi Shiraki1 1. Chiba University (Japan), 2. Toho University (Japan), 3. National Astronomical Observatory of Japan (Japan) |
| The existing directional volumetric display, which employs threads and a projector, is degraded by noise when the displayed image is juxtaposed on the original image. Herein, we employed deep learning techniques to expedite the process of image-quality enhancement in contrast to conventional methodologies. | |
| 3Dp1-9L | Light Field Camera Using Aerial-Imaging and Lenticular Lens for Real-Time 3D Imaging *Kotaro Sakamoto1, Sohoma Kono1, Masanari Kameyama1, Masahiro Kawakita1 1. Osaka Institute of Technology (Japan) |
| We studied a light-field camera using aerial images and a lenticular lens array to capture light ray with wide-viewing angle in horizontal direction. In experiments, we prototyped camera system and measured the performance of the capturing light rays. Moreover, we demonstrated that it is possible to capture and display 3D images in real time by using this capturing method. | |
| 3Dp1-10L | Fabrication Process and High-Resolution Driving Techniques of Ferroelectric Liquid Crystals for Holographic 3D Displays *Hiroki Kobayashi1, Masakazu Nakatani1, Ken-ichi Aoshima2, Mayumi Kawana2, Yuta Yamaguchi2, Kenji Machida2, Nobuhiko Funabashi2, Hideo Fujikake1 1. Tohoku University (Japan), 2. Japan Broadcasting Corporation (Japan) |
| We proposed a thermal and an electrical process of surface-stabilized ferroelectric liquid crystals (SSFLCs) for faster driving with low-voltage application. This process corrected the smectic layer structure of SSFLCs and achieved a low-voltage, high-speed driving. Furthermore, we measured the switching angles of SSFLCs on fine pitch electrodes and confirmed 0.7 µm pitch driving for the first time. | |
| 3Dp1-11L | Evaluation of Transmission Performance and Reconstructed Image Quality for CGH Video Streaming System *Kazuhiro Yamaguchi1, Misato Onishi1, Yuji Sakamoto2 1. Suwa University of Science (Japan), 2. Hokkaido University (Japan) |
| This paper presents a system for streaming videos of computer-generated holograms (CGHs) via networks. In the system, CGH video is streamed through a network, and 3D objects are reconstructed by outputting the streamed CGH video on a spatial light modulator for electro-holography. Transmission performance and image quality of optically reconstructed images were evaluated. | |
| 3Dp1-12L | Simulation of Light Propagation in a HOE-based AR Display System by Deep Learning-based Convolutional Neural Network *ZIH FAN CHEN1, Shiuan Huei Lin1, Vera Marinova2, Ken Y. Hsu1 1. National Yang Ming Chiao Tung University (Taiwan), 2. Institute of Optical Materials and Technologies (Bulgaria) |
| We propose a CNN model to simulate wave propagation in an AR system using Volume Holographic Optical Elements (VHOEs). The model, trained with Coupled Wave Theory (CWT) data, accurately predicts color distribution (nearly 100%), demonstrating its potential for HOE-based AR display studies. | |
| 3Dp1-13L | Real-time Phase-type Spatiotemporal Division Electroholography Using Multi-GPU Cluster System *Yuzuki Nakatani1, Haruka Doi1, Naoya Hanaoka1, Naoki Takada1 1. Kochi University (Japan) |
| We report a real-time high-definition phase-type electroholography with multi-GPU cluster system using spatiotemporal division method. We implemented the algorithm to reduce the number of the trigonometric function calculations in a multi-GPU cluster system. Finally, we realized a real-time electroholography reconstructed from the 3D model comprising 912,462 points at 30 fps. |
3Dp2: Emerging Technologies for 3D/Hyper-Realistic Display (2)
Dec. 4 15:10-16:30 Main Hall
| 3Dp2-1 | Study on Adaptive Sampling and Compression Coding of Point Cloud on Angularity for Human Recognition of Object Shape *Hideaki Kimata1, Soshi Sugawara1, Sakuichi Ohtsuka2 1. Kogakuin University (Japan), 2. International College of Technology, Kanazawa (Japan) |
| The geometry of structures in real space is scanned and stored as a point cloud to be viewed in VR. Conventionally the degree of shape recognition of objects by humans was not sufficiently taken into account on sampling of point cloud. We propose an adaptive sampling and compression coding method to improve object shape recognition while suppressing code volume. | |
| 3Dp2-2 | Full-Color Full-Parallax High-Definition CGH with Large Background Created Using Single FFT *Takeshi Imai1, Hirohito Nishi1, Kyoji Matsushima1 1. Kansai University (Japan) |
| A novel method for computing a large background image in a short time is presented in full-color full-parallax high-definition computer-generated holograms. The proposed method uses a property of numerical wavefield calculation of phase-randomized images with single FFT. An actual full-color CGH is demonstrated. | |
| 3Dp2-3 | Principle of Angular Multiplexing for Volume Holographic Gratings in Lightguide Display According to Lighting Spectrum *Wei-Chia Su1, Shao-Kui Zhou1, Wen-Kai Lin1,2, Hung-Hui Huang1, Ching-Cherng Sun2 1. National Changhua University of Education (Taiwan), 2. National Central University (Taiwan) |
| Owing to the Bragg selectivity of volume holographic gratings, angular multiplexing should be implemented in a volume-holographic-grating-based lightguide display in order to obtain larger FOV images. Design principle of the angular multiplexing is presented according to the bandwidth of lighting spectrum to compensate the target image FOV. A see-through green-color image with 30o horizontal FOV is designed. | |
| 3Dp2-4 | Dual Color Holographic AR Effect Display Using Full-Parallax High-DEefinition Computer-Generated Volume Holograms *Shion Okai1, Hirohito Nishi1, Kyoji Matsushima1 1. Kansai University (Japan) |
| The holographic AR effect is a technique that generate virtual 3D images around physical objects by placing computer-generated volume holograms in front of the physical objects. Proper occlusion processing between self-occluded objects and holographic images are presented not only for single-color but also dual-color effects. | |
| 3Dp2-5 | Theoretical Modeling and Experimental Verification of Eye Tracking Systems in Multiview 3D Displays *Jinhui Hua1, Wei Wu1, Xi Li1, Feng Lu1, Bojia Lyu1,2 1. Shanghai Tianma Microelectronics Co., Ltd. (China), 2. Shanghai Jiao Tong University (China) |
| In this paper, considering the issue of hardware-software asynchrony in multi-view 3D systems, a modeling method is proposed to study the system response time problem. The simulation results yield the probability distribution of the system response time and compare the impact of the optimized system response time on theoretical viewing speed. | |
| 3Dp2-6 | Autostereoscopic 3D Live Systems using Motion Parallax System with Camera Switching and Low-cost Image Processing *Kyosuke Yanagida1, Takafumi Koike1,3, Goro Hamagishi2,3, Hideya Takahashi2,3 1. Hosei University (Japan), 2. Osaka Metropolitan University (Japan), 3. RealImage Inc. (Japan) |
| We have developed an autostereoscopic 3D live system that reproduces motion parallax by adding low-cost image processing to the switching of multiple cameras. We switch the video displayed on the autostereoscopic 3D display according to the observer's viewpoint position. Furthermore, we enhance the reproduction of motion parallax by adding horizontal shift processing to move the video in parallel and cross-dissolve processing for video switching. | |
| 3Dp2-7 | Image Quality Metrics for Cross Reality Considering Image Region and Perspective Based on 360 Degrees Camera *Norifumi Kawabata1 1. Computational Imaging Lab (Japan) |
| In this study, a 360 degrees camera image was generated using the RICOH THETA Z1, and the coded image quality was evaluated considering the area of the image region and the perspective from the 360 degrees camera. Additionally, we experimented a cross reality and subjective quality evaluation using Xperia View, and discussed the relationship between subjective and objective quality. | |
| 3Dp2-8 | Increasing Viewing Zone From Conventional DFD Display by Shifting the Front Image *Gaku Shikama1, Takahiro Omoto1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan) |
| Depth-fused 3D (DFD) display has many merits such as less eye fatigue but has demerit of narrow viewing zone. We can increase this viewing zone in DFD display by shifting the front image according to the observer's movement. We also demonstrate the perceived image by capturing stereo images using DFD display with aerial images. | |
| 3Dp2-9 | Perceived Rotation Angle of Face-Like Image With Simple Facial Parts of Inverted Concave Depth Positions in Arc 3D Display *Kensuke Tamano1, Hiroto Oishi1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan) |
| We have quantitatively clarified that the perceived direction of a face-like image with simple facial parts in inverted concave depth positions rotates with the viewing angle by the subjective tests. All subjects can be perceived rotation sensation of the face-like image and have similar dependencies of the rotation angle. | |
| 3Dp2-10 | Optimization of 3D Stereoscopic Display Characteristics for Oil Painting Exhibition *Yu-Fei Wu1, Chih Yang1, Alejandro J. Caballero2, Bruno D. Bordón2, Tzung-Han Lin1 1. National Taiwan University of Science and Technology (Taiwan), 2. Universidad Politécnica Taiwan-Paraguay (Paraguay) |
| This paper presents an immersive 3D painting interaction framework that faithfully recreates the comprehensive appearance of artworks, offering viewers an immersive art appreciation experience. We integrated physically-based rendering (PBR), 3D display, and human detection technologies to enable the viewers for exploring the artwork's nuances through dynamic rendering and interactive exploration. |
Workshop on Applied Vision and Human Factors
| Dec. 4 | 13:00-14:20 | Room 108 | VHF1 | Color and Vision |
| Dec. 4 | 16:40-18:00 | Room 108 | VHF2/3D1 | Ergonomics of Virtual Images |
| Dec. 5 | 9:00-10:20 | Room 206 | MVS1/VHF3 | Vision and User Interaction for Metaverse Systems (1) |
| Dec. 5 | 10:50-11:50 | Room 206 | MVS2/VHF4 | Vision and User Interaction for Metaverse Systems (2) |
| Dec. 5 | 17:10-18:10 | Small Hall | DES3/VHF5 | Automotive Display Technologies and Driver Safety |
| Dec. 6 | 9:00-10:20 | Room 206 | INP3/VHF6 | Haptics and AR/VR Interaction (2) |
| Dec. 6 | 13:30-14:50 | Room 108 | VHF7 | Ergonomics for Display Applications |
| Dec. 4 | 15:10-16:30 | Main Hall | VHFp1 | Human Factors (1) |
| Dec. 5 | 15:40-17:00 | Main Hall | VHFp2 | Human Factors (2) |
VHF1: Color and Vision
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 4 13:00-14:20 Room 108
Chair: Yoshie Imai (Mitsubishi Elec.)
Co-Chair: Hiroyasu Ujike (Tokyo Information Design Professional University)
| VHF1-1
13:00 |
Invited Recent Activities of the CIE Division 1: Vision and Colour *Yoko Mizokami1 1. Chiba University (Japan) |
| CIE Division 1 is one of the six Technical Divisions of the International Commission on Illumination (CIE). The Teams of Reference is to study visual responses to light and to establish standards of response functions, models, and procedures of specification relevant to photometry, colorimetry, color rendering, visual performance, and visual assessment of light and lighting. I will talk about recent Div. 1 activities related to display industries. | |
| VHF1-2
13:20 |
The Impacts of Color on Text Boxes and Virtual Objects in AR Glasses under Different Viewing Conditions I-Chin Wu1, Min Di1, Ya-Hsuan Lin2, Yi-Hsuan Hung2, *Pei-Li Sun2 1. Institute for Information Industry (Taiwan), 2. National Taiwan University of Science and Technology (Taiwan) |
| This study investigated the color effects of AR glasses on text boxes and virtual objects in different scenes and lighting conditions. The visibility and preference of different color models under different conditions were rated in two psychovisual experiments. The results suggest that luminance differences are a key determinant of performance in outdoor environments. | |
| VHF1-3
13:40 |
A New SDR Twilight Visual Image Display System Employing Ultra-High-Dynamic-Range Image Capture Technology Aligned with Human Circadian Behavior (2): Delivering Precise NVPs Regardless of Illumination Fluctuation *Sakuichi Ohtsuka1, Shoko Hira2, Saki Iwaida3 1. International College of Technology, Kanazawa (Japan), 2. Kagoshima University (Japan), 3. Kagoshima Tenmonkan Medical College (Japan) |
| In this study, we try to extend our hypothesis, i.e., Normalized Visual Percept (NVP), to twilight (mesoscopic) vision. The key idea of the confirmation process is to focus on the visual perception of full moon textures. The main result suggests that the dynamic range at night is significantly wider than the daytime equivalent, i.e., CR (contrast ratio) was more than 106:1 vs. 10 ... | |
| VHF1-4L
14:00 |
A Pilot Study on Evaluating JND Threshold with Color Difference Metrics on SDR Displays *Mutzu Kuo1, Chris Yi-Ho Bai1 1. Color Technology Lab, BenQ Corporation (Taiwan) |
| This study aimed to determine the JND values at variousluminance levels and compare the thresholds of ΔE2000 andΔEITP against JND on a 32” SDR display. QUEST method wasapplied while observers selected mismatched color patches.ΔE2000 and ΔEITP values were calculated and evaluated in CIEL*a*b* color space. |
VHF2/3D1: Ergonomics of Virtual Images
Dec. 4 16:40-18:00 Room 108
Chair: Hiroyasu Ujike (Tokyo Information Design Professional University)
Co-Chair: Sumio Yano (Shimane University)
| VHF2/3D1-1
16:40 |
Effects of HMD Optics and Human Visual Perceptual Function on Object Size Perception *Neiju Matsubara1, Shin Tabeta2, Eri Yonemoto1, Shigehito Tanahashi1 1. Niigata University (Japan), 2. Hokuriku University (Japan) |
| This study uses two experiments to clarify the cause of the difference between the apparent size of visual objects in VR space and that in real space. As a result, the cause was basically effects of human visual perceptual function, and depending on type of HMD, effects of HMD optics was also a cause in addition. | |
| VHF2/3D1-2
17:00 |
Comparison of Pseudo-3D Perception Between Aerial Image and Non-Aerial Image *Kenta Saito1, Haruki Mizushina1,2, Munekazu Date3, Kenji Yamamoto1 1. Tokushima University (Japan), 2. Shinshu University (Japan), 3. Tokushima Bunri University (Japan) |
| In this study, we evaluate whether the pseudo-3D perception is increased by displaying a 2D aerial image, by comparing the pseudo-3D perception of an image displayed on a 2D display with that of a 2D aerial image. | |
| VHF2/3D1-3
17:20 |
Evaluating the Performance of Dihedral Corner Reflector Array-Based Floating Displays Che-Wei Lee1, Zhong-Yong Lin1, Pei-Jung Wu2, *Chih-Hao Chuang1 1. Feng Chia University (Taiwan), 2. National Taichung University of Science and Technology (Taiwan) |
| This study explores dihedral corner reflector arrays (DCRA) for floating display technology, assessing aerial height and viewing angles. It quantifies image quality, illuminance, and distortion, enhancing the adoption of floating displays in various applications. | |
| VHF2/3D1-4L
17:40 |
Color Matching in Augmented Reality under Aligned Conditions *Wei Li1, Midori Tanaka1, Takahiko Horiuchi1 1. Chiba University (Japan) |
| A color matching experiment was conducted to investigate color appearance characteristics in a simulated augmented reality (AR) environment. We found that with stimuli strictly aligned, observers’ matches are generally unaffected by AR-induced color deviation observed in prior research, regardless of hue or foreground luminance. |
MVS1/VHF3: Vision and User Interaction for Metaverse Systems (1)
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 5 9:00-10:20 Room 206
Chair: Munekazu Date (Tokushima Bunri University)
Co-Chair: Yuzo Hisatake (Shizuoka University)
| MVS1/VHF3-1
9:00 |
Invited Improved Depth Perception and Usability of Aerial Displays *Haruki Mizushina1,2, Kohei Yamamoto2, Yasunori Terao2, Shiro Suyama2,3, Kenji Yamamoto2 1. Shinshu University (Japan), 2. Tokushima University (Japan), 3. Utsunomiya University (Japan) |
| This paper proposed methods for improving stable depth perception and usability of aerial displays. Controlling vergence angle of the observer is effective on the stability of depth perception of aerial images. Usability of aerial displays can be improved by feedback with multiple modalities. | |
| MVS1/VHF3-2
9:20 |
Utilization and Visibility of Gaze-Reactive Blur in AR-Based Character Display *Yuta Machigashira1, Haruki Mizushina1,2, Munekazu Date3, Kenji Yamamoto1 1. Tokushima University (Japan), 2. Shinshu University (Japan), 3. Tokushima Bunri University (Japan) |
| We conducted sensory test for visibility of blurred virtual characters and analyzed it to investigate the way to improve the user’s visibility on AR display. We removed blur from virtual character at the gaze position (blur-removed AR) and we added blur to virtual characters in periphery of field of view (blur-added AR). The results show that blur-added AR is better in analysis with response ... | |
| MVS1/VHF3-3
9:40 |
The Effect of Choice on Motivation in Continuous Engagement *Ayumu Watanabe1, Shigehito Tanahashi1 1. Niigata University (Japan) |
| We examined the effect on motivation of with or without a choice of exercise environment over a continuous task of exercising four times a week for two weeks. We found that the continuous choice is beneficial for maintaining higher intrinsic motivation than the no-choice. The results suggested that continuous choice facilitates the improvement of exercise habits. | |
| MVS1/VHF3-4L
10:00 |
Invited Synergy and Medial Effects of Auditory and Electrostatic Force Cueing on Visual Field Guidance in 360° VR *Yasuhito Sawahata1, Masamitsu Harasawa1, Kazuteru Komine1 1. Japan Broadcasting Corporation (Japan) |
| This study examines the use of multimodal cues, including auditory and electrostatic haptic feedback, to guide users' visual fields in 360° VR. Results show that these cues improve target detection in a VR visual search task, with performance influenced by balancing sensory uncertainties. The results suggest that optimizing multimodal cueing can improve the quality of spontaneous 360° VR viewing experiences. |
MVS2/VHF4: Vision and User Interaction for Metaverse Systems (2)
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 5 10:50-11:50 Room 206
Chair: Haruhiko Okumura (Toshiba corp.)
Co-Chair: Takashi Shibata (Tokai University)
| MVS2/VHF4-1
10:50 |
Image Precorrection Based on Gradient Descent for Mitigating Vergence-Accommodation Conflict in AR/VR Displays *Pei-Chia Tsai1, Chieh-En Lee1, Chung-Hao Tien1 1. National Yang Ming Chiao Tung University (Taiwan) |
| Augmented and virtual reality (AR/VR) technologies are rapidly advancing, yet the optical design of AR/VR headsets often leads to vergence-accommodation conflict (VAC), causing user discomfort. This paper presents an image precorrection algorithm based on gradient descent method that adjusts display images to reduce defocus effects and VAC. | |
| MVS2/VHF4-2
11:10 |
Image Size on Retina of Aerial Image Formed Just Behind Viewing Eyes in Ultra-Wide Field-of-View Display *Hiroki Takatsuka1, Takumi Watanabe1, Shiro Suyama1, Munekazu Date2, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan), 2. Tokushima Bunri University (Japan) |
| Immersive experience is possible by covering the field of view with images. We have realized ultra-large image size on retina when the aerial image is formed just behind viewing eyes. The closer to the aerial image position, the larger the image on retina became. A ultra-large image is confirmed at the position formed just behind the eyes. | |
| MVS2/VHF4-3
11:30 |
Curved Aerial 3D Image by Projecting 3DCG Image Onto a Concave Screen and Interaction Between Planar Operations by Use of a 2D Sensor and 3D Space *Ryota Yamada1, Takumi Watanabe1, Mayu Adachi1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan) |
| A novel interaction with an aerial convex 3D image has been realized by correlating a 2D sensor plane operation and 3D space. The convex aerial 3D image can be formed by use of concave object as a light source in aerial imaging by retro-reflection (AIRR). Projecting a spherically distorted image on a concave screen with a projector can compensate the convex curved image. |
DES3/VHF5: Automotive Display Technologies and Driver Safety
Special Topic of Interest on Automotive Displays
Dec. 5 17:10-18:10 Small Hall
Chair: Haruhiko Okumura (Toshiba corp.)
Co-Chair: Makio Kurashige (Dai Nippon Printing)
| DES3/VHF5-1
17:10 |
Invited Safe Image Display Conditions of Head-Up Display *Akinari Hirao1, Takashi Hosokawa2, Takayuki Tsui3, Tomotaka Igarashi3 1. Shibaura Institute of Technology (Japan), 2. Japan Automobile Research Institute (Japan), 3. Japan Automobile Manufacturers Association (Japan) |
| HUDs are an effective means of safely presenting information to drivers because they require little eye movement. However, depending on the display method, it may have the opposite effect, such as unawareness of the hazard behind the display. In this study, experiments were conducted on image display methods in HUDs to determine safe display conditions. | |
| DES3/VHF5-2
17:30 |
Invited New International Safety Regulation for Automotive Head-Up Display *Akinari Hirao1,2 1. Shibaura Institute of Technology (Japan), 2. National Traffic Safety and Environment Laboratory (Japan) |
| Head-up displays are increasingly being adopted to present information because they enable drivers to receive information without eye movement. On the other hand, overlaying information on the forward field of vision may cause safety hazards. This year, a new UN regulation for HUD displays was approved. This presentation introduces the contents of the new regulations. | |
| DES3/VHF5-3
17:50 |
Effects of Symbol Size, Luminance Contrast and 3D Speckle on AR-HUD Symbol Recognition *Ting-Yu Liu1, Pei-Li Sun1 1. National Taiwan University of Science and Technology (Taiwan) |
| Through a series of psychovisual experiments, this study evaluates the effects of luminance contrast, speckle contrast, speckle size, and viewing distance on the recognizable size of symbols displayed in AR-HUD. The results showed that Michelson Contrast with power function inversely relates to the recognizable size. A regression model was derived using the experimental data to predict the threshold of recognizable size of the symbols. |
INP3/VHF6: Haptics and AR/VR Interaction (2)
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 6 9:00-10:20 Room 206
Chair: Yuichi Sasaki (Mitsubishi Elec.)
Co-Chair: Masamitsu Harasawa (NHK)
| INP3/VHF6-1
9:00 |
Invited Intensifying Somatosensory Communication *Yuichi Nakamura1 1. Kyoto University (Japan) |
| The somatosenses often lack temporal and spatial precision, which causes difficulties in actual applications such as communicating an exact location. We believe such disadvantages could be overcome with smart design, e.g., a symmetrical design for intuitively transmitting motion intention, and motion or action prediction, to provide stimulation at proper time. This article presents our experimental findings. | |
| INP3/VHF6-2
9:20 |
Invited A Novel Olfactory Display System for Presentation of Orthonasal and Pseudo-Retronasal Odors during Breathing *Yuji Wada1 1. Ritsumeikan University (Japan) |
| My team and I have developed a novel olfactory delivery system capable of presenting odor stimuli during both inhalation and exhalation. By placing an odor stimulus tube within the nasal cavity and sealing the gap between the tube and the nostril, participants can detect odors during both breathing phases. This system enables the investigation of how breathing patterns and odor timing impact odor-taste interactions. | |
| INP3/VHF6-3
9:40 |
Evaluation of Viewers' Physiological State by ECG Data while Viewing Art in an Immersive Space *Go Kazawa1, Ryohei Nakatsu1, Naoko Tosa1, Yasuyuki Uraoka2, Akane Kitagawa2, Koichi Murata2, Tatsuya Munaka2, Yoshiyuki Ueda1, Masafumi Furuta2, Michio Nomura1 1. Kyoto University (Japan), 2. Shimadzu Corporation (Japan) |
| We hypothesize that art appreciation positively affects viewers' motivation and creativity. First, an immersive environment was constructed. Then, we measured and analyzed physiological data obtained while subjects were viewing art and other content in the environment. In this paper, we report on the results of analyzing ECG data when art content is compared with geometric figure content and no content using the environment. | |
| INP3/VHF6-4
10:00 |
Invited Exploring 4D Space with Visual and Tactile Interface Haruo Igarashi1, *Hideyuki Sawada1 1. Waseda University (Japan) |
| A novel 4D interaction system with visual and tactile presentations is proposed. We focus on the role of the tactile sensation in the perception, and introduce a tactile display to present tactile sensation when a user touches the 3D hypersurface of a 4D object located in 4D space. |
VHF7: Ergonomics for Display Applications
Dec. 6 13:30-14:50 Room 108
Chair: Takashi Shibata (Tokai University)
Co-Chair: Nobuyuki Hiruma (NHK Foundation)
| VHF7-1
13:30 |
Invited Esports and the Broader Need for More Interactive Displays *Benjamin Watson1 1. North Carolina State University (United States of America) |
| Displays are being used for increasingly interactive applications including gaming, video conferencing, and perhaps most demanding, esports. We review the display needs of esports, and describe how current displays fail to meet them by using a high-latency I/O pipeline. We conclude with research directions that move away from this pipeline and better meet interactive user needs. | |
| VHF7-2
13:50 |
Invited Ergonomic Challenges and Considerations for the Use of Digital Devices in Schools *Takashi Shibata1 1. Tokai University (Japan) |
| Students are increasingly using digital devices in school, raising concerns about visual fatigue and the risk of myopia from prolonged close-up screen exposure. Moreover, the direct reflection of classroom ceiling lights on device screens poses a visibility issue. This study explores key considerations for the effective and ergonomic use of digital devices in the classroom. | |
| VHF7-3
14:10 |
Effects of 3D Cues for Depth Perception on an Eye-Sensing Light Field Display *Yoshihiko Kuroki1, Kazuki Yokoyama2, Masami Ogata2, Tsutomu Ichinose2, Masato Akao2, Koji Aoyama2 1. Comfort Vision Research Laboratory Co. Ltd. (Japan), 2. Sony Corporation (Japan) |
| In order to investigate the effect of 3D cues on the accuracy of stereo perception in an eye-sensing light field display1), the accuracy of manipulating the display position of a cube in the display to match the position of a real cube of the same color and shape in real space was evaluated. A significant effect of 3D cues to increase the accuracy ... | |
| VHF7-4L
14:30 |
Usage of Split and Separation for Large Wide Screens Daeun Park1, *YungKyung Park1 1. Ewha Womans University (Korea) |
| This study analyzes the difference between split and separate layouts on large screens, examining user preferences based on screen ratios and content usability. The study concludes that asymmetrical screen splitting is more effective depending on the content and setting an optimal screen ratio is crucial for enhancing usability. |
VHFp1: Human Factors (1)
Dec. 4 15:10-16:30 Main Hall
| VHFp1-1 | Adaptive Color Synchronization: A Remote Calibration Method for Accurate Color Representation Across Display *Li-Wei Chiang1, Yu-Chih Chung1, Cian-Wei Wang1, Yi-Tsung Pan1, Hsiang-Yu Tsai1 1. National Taiwan University of Science and Technology (Taiwan) |
| This research explores the use of remotesynchronization to match colors across different devices, aiming to reduce the reliance on physical color samples and the associated shipping costs in industries that require shipping for color inspection. It will achieve the goals of cost-effectiveness, user experience, and environmental benefits. | |
| VHFp1-2 | A Comparison of White Appearance in Tablet Display between Different Age Groups *Hsin-Pou Huang1, Hung-Chung Li2, Yi-Jie Wu1, Cheng-Yu Tsao1, Zhi-Han Wang1 1. Chihlee University of Technology (Taiwan), 2. National Chung Hsing University (Taiwan) |
| This study aims to analyze how older observers perceive the white appearance of an iPad under five lighting conditions and compare their evaluations with the younger observers. As a result, young observers consistently perceive the whitest stimulus at a higher CCT compared to older observers across all lighting conditions. | |
| VHFp1-3 | Modeling for Perceived Brightness and Visual Comfort in Augmented Reality Display *Nailong He1,2, Yuning Zhang1,2, Wei Wang1, Xinhang Lin1, Chenhao Hu1, Baoping Wang1,2 1. Southeast University (China), 2. Shi Cheng Laboratory for Information Display and Visualization (China) |
| The virtual-real fusion of Augmented reality (AR) display makes the impact of ambient light on the image brightness perceived by human eyes very obvious. Therefore, this paper studies the brightness of AR display to meet the needs of human eyes and comfort under different ambient light, and establishes a preliminary model. | |
| VHFp1-4L | Effect of Biofeedback on Pulse Rate Self-Monitoring During Workouts Using a Ring-Type Sensor: A Pilot Study on Healthy Subjects *Emi Yuda1, Hiroyuki Edamatsu2, Kenji Hosomi2, Yutaka Yoshida1 1. Tohoku University (Japan), 2. San-ei Medisys Ltd. (Japan) |
| In this study, we used a wearable sensor with a display to examine the biofeedback effect of real-time self-monitoring of pulse rate (PR) and SpO2 during a workout. Three healthy subjects compared bio-signals with and without self-monitoring. Results suggested that self-monitoring decreased physical activity and PR by suppressing sympathetic nervous system activity. |
VHFp2: Human Factors (2)
Dec. 5 15:40-17:00 Main Hall
| VHFp2-1L | Changes in Skin Conductance Levels Due to the Presentation of Scents in Work Booths with Controlled Lighting Yutaka Yoshida1, Aoi Otani2, Atsushi Yamada2, *Emi Yuda1 1. Tohoku University (Japan), 2. Fuji Industrial, Ltd (Japan) |
| In this study, we used skin conductance level (SCL) to investigate the physiological response to odors in a lighting-controlled work booth. There was no significant difference in SCL between pleasant (linalool) and unpleasant (trans-2-nonenal) odors, however, SCL decreased significantly during odor presentation. | |
| VHFp2-2L | Development of an MR Speech Transcription System for the Hearing Impaired with Speaker Identification *Shunya Nakatani1, Tomoyoshi Shimobaba1, Tomoyoshi Ito1, Atsushi Shiraki1 1. Chiba University (Japan) |
| This study introduces a conversation support system for individuals with hearing impairments using mixed reality technology. The system leverages a microphone array to estimate the direction of arrival (DOA) of sound and provides speaker-specific transcriptions. Challenges remain regarding the precision of DOA estimation and the system's real-time transcription performance. |
Workshop on Projection and Large-Area Displays and Their Components
| Dec. 4 | 13:00-14:20 | Room 206 | PRJ1 | Outer Space and Analysis |
| Dec. 4 | 14:50-16:10 | Room 206 | PRJ2 | Medical Applications and Related Components |
| Dec. 4 | 16:40-18:00 | Room 206 | PRJ3 | User Interaction and Feedback |
| Dec. 5 | 9:00-10:20 | Room 204 | PRJ4 | Projection Technologies |
| Dec. 5 | 10:50-11:50 | Room 204 | PRJ5 | Holographic and Aerial Projection |
| Dec. 5 | 15:20-16:20 | Room 204 | PRJ6/3D5 | Automotive Projection Display |
| Dec. 5 | 17:10-18:30 | Room 204 | PRJ7/3D6 | Aerial Display |
| Dec. 6 | 9:00-10:20 | Room 204 | PRJ8 | Measurement and Evaluation |
| Dec. 6 | 10:50-12:10 | Room 204 | MVS6/PRJ9/3D7 | Metaverse Technologies for Automotive |
| Dec. 5 | 13:50-15:10 | Main Hall | PRJp1 | Projection Technologies |
PRJ1: Outer Space and Analysis
Dec. 4 13:00-14:20 Room 206
Chair: Makio Kurashige (Dai Nippon Printing)
Co-Chair: Tetsuji Suzuki (JVC Kenwood)
| PRJ1-1
13:00 |
Invited Landing Results of Smart Lander for Investigating Moon (SLIM) Using Optical Navigation *Seisuke Fukuda1, Takayuki Ishida1, Kazuki Kariya1, Shinichiro Sakai1, Kenichi Kushiki1, Shujiro Sawai1 1. Japan Aerospace Exploration Agency (JAXA) (Japan) |
| Smart Lander for Investigating Moon (SLIM), which is the mission of Japan Aerospace Exploration Agency (JAXA), achieved the first pinpoint lunar landing in the world on January 19, 2024. In this paper, the actual operation results of the SLIM's lunar landing operation are shown, especially by introducing the crater-based optical navigation which is one of key technologies for the pinpoint landing. | |
| PRJ1-2
13:20 |
Invited Application and Engineering of MEMS SLMs in Sensing, Display, and Lidar *Yuzuru Takashima1, Chuan Luo1, Gregory Nero1, Yexin Pei1, Tianyao Zhang1, Xianyue Deng1, Jeff Chen1, Seyedmohammad Yusofsani1, Yefu Zhang1, Emil Varghese1, Rajesh Shrestha1 1. University of Arizona (United States of America) |
| Beam and image steering by Micro Electro Mechanical System (MEMS) spatial light modulators decouples trade-offs between resolution, field of view, and size of display panel and optics. MEMS based image steering solves optical design challenges commonly found in the Augmented Reality display engine and lidar systems. | |
| PRJ1-3
13:40 |
Invited Measurement of Tolerance Limits for Video Latency Using High-Speed Cameras and High-Speed Projectors *Tomohiko Hayakawa1 1. Tokyo University of Science (Japan) |
| Since the latency of the immersive device was causing VR sickness and a decrease in immersion, we conducted an investigation. We developed and tested a system with a minimum latency of 4.3 ms, which can provide arbitrary latency with a resolution of 1 ms. The results showed that there is a latency threshold between 24.3 ms and 44.3 ms that affects task performance. We hope that the results will ... | |
| PRJ1-4L
14:00 |
Invited Multi-Input and Multi-Objective Optimized Mini-LED Backlight for Integrated LCD and Visible Light Communication Zhiqing Zhao1, *Zong Qin1 1. Sun Yat-Sen University (China) |
| This study proposes a design diagram for mini-LED LCDs integrated with visible light communication. Backlight segments are large-scale inputs, and three critical functions (image distortion, spectral efficiency, and power consumption) are incorporated as multiple objectives. As a result, the Pareto Front is effectively generated for customized needs. |
PRJ2: Medical Applications and Related Components
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 4 14:50-16:10 Room 206
Chair: Tetsuji Suzuki (JVC Kenwood)
Co-Chair: Toshiya Nakaguchi (Chiba University)
| PRJ2-1
14:50 |
Retinal Projection AR Glasses with a Wide Eyebox *Yoshifumi Sudoh1, Kayoko Fujimura1, Takemasa Tsutsui1, Shu Tanaka1, Masahiro Itoh1 1. Ricoh Company, Ltd. (Japan) |
| Retinal projection with a narrow beam offers a broad depth of field. However, it has a limited range of permissible eye positions for optimal viewing (eyebox). In this paper, we developed an optical system that comprises a light deflection unit, which sequentially arranges the light beam to the eye, and then a light scanning unit for rendering the image. The developed optical system can achieve ... | |
| PRJ2-2
15:10 |
Quantum Dot Color Conversion Layers for MicroLED Displays *Dieter Cuypers1, Harindra Kumar Kannojia1, Geert Van Steenberge1 1. imec / Ghent University (Belgium) |
| MicroLED based displays enjoy a lot of attention these days. An attractive route for realizing full-color single chip microLED displays is using blue microLEDs together with a quantum dot color conversion layer for the red and green. We report on the soft imprinting patterning technique for the quantum dot layers. | |
| PRJ2-3L
15:30 |
Invited Development of Novel Diffraction Structure for Achieving High-Quality and Low-Cost Waveguide for AR Displays *Kazuhiro Minami1, Akira Hashiya1, Satoshi Kuzuhara1 1. Panasonic Holdings Corporation (Japan) |
| Waveguides are optical components that can significantly reduce the thickness and size of augmented reality (AR) displays. In this study, we developed a novel two-dimensional slanted diffraction structure. This paper reports the performance and evaluation results of our prototype, demonstrating its potential for enhancing AR display technology. | |
| PRJ2-4L
15:50 |
Development of a Breast Cancer Surgery Support System with Superimposed MRI Images at Specified Depths *Mizuki Hattori1, Takaya Oguchi1, Hiroshi Fujimoto1, Yoshihiro Kuroda2, Katsuhiro Nasu1, Hideki Hayashi3, Yukihiro Nomura3, Toshiya Nakaguchi3 1. Chiba University (Japan), 2. University of Tsukuba (Japan), 3. Center for Frontier Medical Engineering (Japan) |
| We developed a breast cancer surgery support system using a tablet terminal that superimposes a maximum intensity projection (MIP) image of magnetic resonance imaging (MRI) images on camera images taken of the patient during surgery to assist in determining the extent of resection. In this study, we developed a system that can project MRI image from the body surface to a specified depth as a ... |
PRJ3: User Interaction and Feedback
Dec. 4 16:40-18:00 Room 206
Chair: Yosuke Asai (Panasonic)
Co-Chair: Masashige Suwa (Mitsubishi Elec.)
| PRJ3-1
16:40 |
Invited Construction of Biophilic Environment Using Artificial Lighting Technology *Kentaro Yamauchi1, Naoko Takei1, Yumi Fujiwara1, Yuki Naruse1, Ryo Okamoto1, Takuya Yamashita1 1. Panasonic Corporation (Japan) |
| In recent years, the focus of spaces like offices andcommercial facilities has shifted to prioritize the well-beingand emotional satisfaction of the people. This has led to the incorporation of the biophilia concept into the design elements of these spaces, aiming to create a lighting environment with biophilic characteristics by integrating lighting and image projection technologies. | |
| PRJ3-2
17:00 |
Invited Pseudo Tactile Feedback for Extended Hand Users *Yushi Sato1, Daisuke Iwai1, Kosuke Sato1 1. Osaka University (Japan) |
| In this paper, we introduce our efforts to enable users to perceive the tactile sensations of untouchable objects without haptic devices, by utilizing mixed reality technology and human perceptual characteristics. | |
| PRJ3-3
17:20 |
Research on the Effects of Art Lighting on Creative Work *Ryohei Nakatsu1, Shun Kanai1, Akihiro Yamada2, Seiro Yuge2, Takashi Kusumi1, Naoko Tosa1 1. Kyoto University (Japan), 2. Mitsubishi Electric Corporation (Japan) |
| We constructed an experimental environment to simulate an office with glass lighting as the primary lighting. Next, we evaluated the environment from the perspective of how subjects feel such an environment. The results show that art lighting was rated significantly higher in the psychological evaluation than LED lighting. Also, we evaluated the environment from the perspective of whether it enhances the subjects’ creativity using J. ... | |
| PRJ3-4
17:40 |
Psychological Evaluation of the Effects of Exposure to Projector Light while Viewing Art *Ryohei Nakatsu1, Shun Kanai1, Go Kazawa1, Kazuyoshi Kitabayashi2, Hirotaka Kawata2, Manae Miyata2, Naoko Tosa1 1. Kyoto University (Japan), 2. Seiko Epson Corporation (Japan) |
| When projecting art and other contents using a projector, entering the space where the contents are projected is considered adequate. This study confirms the effectiveness of this method through a psychological experiment. We constructed a space in our laboratory where art is widely projected on the floor. Then we asked subjects to view art contents under three viewing positions and to evaluate the experience. The ... |
PRJ4: Projection Technologies
Dec. 5 9:00-10:20 Room 204
Chair: Dieter Cuypers (Ghent University)
Co-Chair: Kazutoshi Ishida (DNP)
| PRJ4-1
9:00 |
Invited Neural Projector Deblurring *Yuta Kageyama1,2 1. Osaka University (Japan), 2. SenseTime Japan, Ltd. (Japan) |
| Projection Mapping (PM), which overlays computer-generated cyber data onto an object using a projector, is an essential technology for various fields. However, the shallow Depth of Field (DoF) of the projector causes defocus blur in the projected image, significantly degrading the quality of PM applications. This paper discusses deblurring techniques using neural networks. | |
| PRJ4-2
9:20 |
Optimizing Diffusion for Adaptive BRDF Display with Multi-Light Ray Projection *Sho Nishida1, Toshiyuki Amano1 1. Wakayama University (Japan) |
| We have proposed a method of presenting BRDF materiality by employing ray diffusion and introducing pre-compensation to BRDF data. In this presentation, we discuss the optimal diffusion coefficients of the diffuser and projected ray pre-compensation in a diffusion-based presentation method that solves the problem of fake illumination peaks that occur in such diffuser-based BRDF presentation. | |
| PRJ4-3
9:40 |
Analysis of the Efficiency and Uniformity Ratio of a Corrugated Light Guide for RGB Laser Diodes in LCOS *Yi-Lun Su1, Wen-Shing Sun1 1. National Central University (Taiwan) |
| The ideal white point for RGB color mixing using an RGB laser diode light source is found and than was required to form an ideal white point of 92500 lm. Two types of RGB light guides are designed: a Round to Round light guide and a corrugated Round to Round light guide, and observations made of their efficiency and uniformity on an LCOS panel. | |
| PRJ4-4L
10:00 |
A Novel Method to Analyze Speckle Contrast and Related Issues of Laser Projection Display Systems *Xue Li1, Masatake Hayashi1, Nobuo Naito1, Ke Yan2, Jie Dai3, Yoshihiro Oshima1 1. TVS REGZA Corporation (Japan), 2. Hisense Laser Display Co., Ltd. (China), 3. Qingdao HiFeel Innovative Materials Co., Ltd. (China) |
| Laser projection displays are experiencing rapid expansion. However, one issue that deserves consideration is speckle noise. In this study, we propose a novel method for a more precise analysis: the inclusion of background measurements using non-coherent environmental light. The findings reveal that the measured speckle contrast occasionally includes something other than speckle. In such case, it was found to be the nonuniformity of the screen. |
PRJ5: Holographic and Aerial Projection
Dec. 5 10:50-11:50 Room 204
Chair: Juiwei Pan (National Chiao Tung University)
Co-Chair: Makio Kurashige (Dai Nippon Printing)
| PRJ5-1
10:50 |
Full-Color Computer Image Reconstruction Using Holographic Dichroic Beam-Splitter *Cheng-Yu Chang1, Fang-Yu Lu2, Hui-chi Chen2 1. National Taiwan University of Science and Technology (Taiwan), 2. Fu Jen Catholic University (Taiwan) |
| In this study we develop a holographic dichroic beamsplitters plate (HDBS) using photopolymer film. This holographic optical element was designed to avoid the cross-talk problem of RGB colors in CGH system, also simplified the full-color image optical reconstruction system. | |
| PRJ5-2
11:10 |
Autonomous Motion of Arc-3D-Generated Image Floating in Front of an Observer Moving With an Illumination Light *Hiroto Oishi1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan) |
| We have clarified the floating distance of the arc 3D image changes autonomously in the same direction as the observer and light move simultaneously. This autonomous change of arc 3D image distance is achieved by changing the height and slanted angle of the arc 3D substrate. The proposed tracking motion is analyzed theoretically and confirmed by experiments in a scale down system. | |
| PRJ5-3
11:30 |
Glasses-Free AR Cosmetics by Use of Aerial Display Without Glare to the User *Mayu Adachi1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan) |
| Glasses-free augmented reality (AR) display has been utilized for digital cosmetics without glare to its user. Aerial makeup image is formed on the user's face with aerial imaging by retro-reflection (AIRR). This method does not cause glare to the user because the light is spread over a large beam splitter in the AIRR optical system. The user's eyelids, cheeks, and lips change color. |
PRJ6/3D5: Automotive Projection Display
Special Topic of Interest on Automotive Displays
Dec. 5 15:20-16:20 Room 204
Chair: Kazuhiro Ohara (Visitech)
Co-Chair: Haruki Mizushina (Tokushima University)
| PRJ6/3D5-1
15:20 |
Invited High Image Quality Computer-Generated Holography Display Based on 4K Amplitude Modulating LCoS *Darran Francis Milne1, Christian Fieldhouse1, Mark Brannan1, Simon Chandler1, Indi Pritchard1, Alfred Newman1 1. VividQ Limited (UK) |
| We present a novel fast CGH algorithm and projector design, based on amplitude modulation and incoherent LED illumination. This design provides significant improvements in image quality, contrast and computational efficiency over iterative phase-only methods and provides a realistic route to the use of CGH within applications such as virtual reality and automotive Heads Up Display. | |
| PRJ6/3D5-2
15:40 |
Invited Optical Technology Development for Head-Up Display *Keiji Sugiyama1, Ken'ichi Kasazumi 1, Kosuke Imawaka1, Satoshi Kuzuhara2, Yosuke Asai2 1. Panasonic Automotive Systems Co., Ltd. (Japan), 2. Panasonic Holdings Corporation (Japan) |
| We has been developing optical technologies for Head Up Display (HUD). For HUD, it is important to realize large image in small package size. But, large image size and small package size are generally contradictory. In this paper, we describe Panasonic optical technologies for conventional mirror HUD and discuss the possibility of advanced future HUD. | |
| PRJ6/3D5-3
16:00 |
Novel Vehicular Glazing Displays Enabled by Optic-Clear Emissive Projection Screen *Ted Sun1, Minghua Zhu1 1. Sun Innovations Inc. (United States of America) |
| A novel emissive projection display (EPD) was developed, which comprises a fully transparent screen made of RGB emissive nanomaterials and a blue-light digital image projector. We will discuss recent advances on EPD, including full color rendition on an optic-clear emissive screen without tri-color phosphors pixelation, extremely bright and stable emissive screen materials, and various new vehicle display applications. |
PRJ7/3D6: Aerial Display
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 5 17:10-18:30 Room 204
Chair: Toshiyuki Amano (Wakayama University)
Co-Chair: Mariko Yamaguchi (NTT)
| PRJ7/3D6-1
17:10 |
Evaluation of Image Quality Improvement for Design of Image Processing for Sharpening Aerial Display *Hayato Kikuta1,2, Shiro Suyama2, Hirotsugu Yamamoto2 1. Mitsubishi Electric Corp. (Japan), 2. Utsunomiya University (Japan) |
| We develop an aerial display system that features an image pre-processing that suppresses degradation of image quality of aerial images caused by diffraction by retro-reflector. Furthermore, we propose a verification method to quantitatively express the effect of image quality improvement using the sharpness of aerial images as the evaluation axis for evaluation of product applicability. | |
| PRJ7/3D6-2
17:30 |
Outdoor Aerial LED Signage Formed With AIRR by Use of Fresnel Lens *Shinya Sakane1,2, Koji Yoshikawa2, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan), 2. Seiwa Electric Mfg. Co., Ltd. (Japan) |
| We have developed an aerial LED display that meets outdoor brightness standards. We report on the results of an experiment using this device to see if an aerial LED sign can actually be seen outdoors. | |
| PRJ7/3D6-3
17:50 |
Cylindrical Aerial Display Viewable From 360-Degrees Using Aerial Imaging by Retro-Reflection *Masaki Aihara1, Kengo Fujii1, Tomohiro Yendo1 1. Nagaoka Univ. Tech. (Japan) |
| The purpose of this research is to realize cylindrical aerial display with all around view using AIRR. The proposed display rotates the basic AIRR structure at high speed and displayed aerial images in a cylindrical shape by the afterimage effect. We confirmed through the simulation and the actual machine that the proposed method can display an aerial image visible from all around. | |
| PRJ7/3D6-4
18:10 |
Bidirectional Rotation Perception of Dark Hole on Curved Surface due to View Position in Depth-Fused 3D Display *Takahiro Omoto1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan) |
| We propose bidirectional rotation perception system by using depth-fused 3D (DFD) image of dark hole on curved surface. The concave DFD image can provide positive rotation perception in the direction of viewpoint motion. The convex DFD image can provide negative rotation perception in the opposite direction of viewpoint motion. |
PRJ8: Measurement and Evaluation
Dec. 6 9:00-10:20 Room 204
Chair: Hidekazu Hatanaka (Ushio)
Co-Chair: Yoshiaki Kouyama (Sony)
| PRJ8-1
9:00 |
Invited XR Testing Platform and Initial Results of Commercial VR Products: Eye Tracking Test & Photon-to-Photon Latency Test *Lei Zhao1 1. Yongjiang Laboratory (China) |
| Yongjiang Laboratory is pioneering a one-stop XR testing platform, which strives to empower the industry with consistency and reliability in quality assurance. An objective eye tracking testing method and a photon-to-photon latency test method were presented. | |
| PRJ8-2
9:20 |
Invited Measurement Method of Eye Safety for Phase Modulation Projector *Shogo Kubota1, Masa Tanaka1, Keisuke Fujii1 1. Sony Corporation (Japan) |
| The study presents a method for evaluating eye safety in phase modulation projectors according to laser safety standards. The projector's design compliance with safety regulations is assessed, and its maximum luminance is estimated based on standards for projected light in image projectors. | |
| PRJ8-3
9:40 |
3-Dimensional Imaging Using Millimeter-Wave Radar Technique for Remote Security Inspection *Hiroshi Murata1, Arie Setiawan1, Shu Sato1, Hitoshi Nohmi2, Naruto Yonemoto3 1. Mie University (Japan), 2. Alouette Technology (Japan), 3. National Institute of Maritime, Port and Aviation Technology (Japan) |
| Millimeter-wave imaging is attractive as an indirect inspection technique for security solutions due to its ability to penetrate common cloth, leather, plastic, and paper to detect concealed objects without harm. This paper reports experimental demonstrations of 3-dimensional imaging results utilizing the millimeter-wave radar technique and a dielectric lens. | |
| PRJ8-4L
10:00 |
Simulation of Measured Color Speckle Distribution Considering RGB Speckle Grain Effects *Junichi Kinoshita1, Kazuo Kuroda2, Kazuhisa Yamamoto3 1. Photonics Science Technology Alliance (Japan), 2. University of Tokyo (Japan), 3. Osaka University (Japan) |
| Measured color speckle distribution was well simulated for the first time by statistically regenerating R, G, B speckle grains. The probability distributions of measured peak and bottom irradiance values of the R, G, B speckles were newly analyzed. We also evaluated hexagonal shape metric of the simulated color speckle distribution. |
MVS6/PRJ9/3D7: Metaverse Technologies for Automotive
Special Topic of Interest on Automotive Displays
Dec. 6 10:50-12:10 Room 204
Chair: Satoshi Ouchi (Hitachi)
Co-Chair: Kazuhiro Ohara (Visitech)
| MVS6/PRJ9/3D7-1
10:50 |
Invited Recent Developments of Holographic Contact Lens Display *Yasuhiro Takaki1 1. Tokyo University of Agriculture and Technology (Japan) |
| Smart contact lenses, particularly those equipped for AR visual interface devices, have garnered considerable interest. Recently, the contact lens display using the holographic image generation technique has been proposed. This paper outlines recent developments in holographic contact lens displays and also introduces a new integrated camera technique. | |
| MVS6/PRJ9/3D7-2
11:10 |
Development of Optical System for Slim Design Headlights *Tomohide Morimoto1, Masashige Suwa1 1. Mitsubishi Electric (Japan) |
| Development of automobile headlights is important for not only safety, but also design of cars. Recently, we have developed RIR optical system and achieved thin design headlights. Here, we report the new optical system for slim design headlights with high light use efficiency. | |
| MVS6/PRJ9/3D7-3
11:30 |
New Optical Design of HUD Using Mirror Array Vision Extender *Chunmin Chen1, Miya Fang1 1. Shinyoptics Corp. (Taiwan) |
| A novel optical structure, mirror array vision extender (MAVE), is proposed to solve volume issue of head up display (HUD). This pioneering design, which employs a mirror array to extend the vertical field of view (FOV) and reduce the vertical dimension of HUD. In this design, we use 3 mirrors to prove the capability of this optical architecture. | |
| MVS6/PRJ9/3D7-4
11:50 |
Optimized Rectificaiton by Using Original Lens Projection for Fisheye Stereo Cameras *Hisayoshi Kaneda1, Kazusyohi Yamazaki1 1. Hitachi, Ltd (Japan) |
| We developed a novel method for optimizing stereo vision in fisheye lens cameras. This method uses the original lens projection for image rectification, resulting in a 50% reduction in the rectified image size of a 120° wide angle stereo camera from the perspective projection. Its reduction helps conserve memory capacity, providing a significant advantage in resource-limited environments like in-vehicle systems. |
PRJp1: Projection Technologies
Dec. 5 13:50-15:10 Main Hall
| PRJp1-1 | Floating Sphere Display Using Soap Bubble or Double Balloon for Aerial Signage Which Enables to Make Long Stay in the Air *Kunio Sakamoto1, Yuta Tokura1, Sorachi Morikawa1 1. Konan University (Japan) |
| The authors have researched floating 3D real images which are in the room and above the corridor or street. Then we have been considering how to put optical unit systems which are virtually arranged and floating in the air around reconstructed images. This paper describes aerial displays equipped with optical and floating systems. | |
| PRJp1-2 | Customized Spectacles for Head Mount Display Hsiao-Wen Lee1, *Jui Wen Pan2 1. ORAGNE LIGHT TECHNOLOGY LTD (Taiwan), 2. National Yang Ming Chiao Tung University (Taiwan) |
| Customized spectacles can be developed for head mount display. By using the Zernike polynomial of eye aberration, we can get a good conjugation relationship between the retina and the virtual image of head mount display. The novel spectacles can offer better visual image quality for users with head mount display | |
| PRJp1-3 | Design of a 50-Degree Field of View One-Dimensional Expanding Pupil Optical Lens for AR Modules *Hsu Ying-Shun1, Sun Wen-Shing1 1. National Central University (Taiwan) |
| Typical AR modules require the use of diffractive elements to achieve two-dimensional pupil expansion to ensure a sufficiently large exit pupil. This paper achieves one-dimensional pupil expansion through optical lens design, allowing the diffractive elements to only need to perform one-dimensional expansion, thereby enhancing efficiency. | |
| PRJp1-4 | Compact Grating-Based Waveguide Display with Lens-Like Input-Coupling Grating *Hung-Huei Huang1, Shao-Kui Zhou3, Wen-Kai Lin2, Wei-Chia Su1 1. National Changhua University of Education (Taiwan), 2. National Central University (Taiwan), 3. National Chiao Tung University (Taiwan) |
| An input-coupling holographic grating with lens function is presented to effectively replace the required projection lens in a grating-based waveguide display system. The overall system size and weight of the waveguide display system is effectively reduced. A see-through green-color image with FOV of 34.6° × 55.0° (H × V) is obtained. |
Workshop on Electronic Papers and Nonvolatile Displays
| Dec. 4 | 13:00-14:00 | Room 207 | EP1 | Recent Progress on Electrophoretic Displays |
| Dec. 4 | 14:50-16:10 | Room 207 | EP2 | Diversity in Chromic Display Systems (1) |
| Dec. 4 | 16:40-18:00 | Room 207 | EP3 | Diversity in Chromic Display Systems (2) |
| Dec. 5 | 9:00-10:20 | Room 107 | EP4 | Stretchability and Scalability in Nonvolatile Display Fabrication |
| Dec. 5 | 10:50-11:50 | Room 107 | EP5 | Recent Progress on Electrochromic Displays |
| Dec. 5 | 13:50-15:10 | Main Hall | EPp1 | Progress on Electronic Paper and Nonvolatile Displays |
EP1: Recent Progress on Electrophoretic Displays
Dec. 4 13:00-14:00 Room 207
Chair: Toru Fujisawa (Tohoku Univ.)
Co-Chair: Ming Wang (Amazon Lab126)
| EP1-1
13:00 |
Invited Activation of All Kind of Surfaces by Using e-Paper *Makoto Omodani1, Hiroyuki Yaguchi1, Ryo Shinohara1 1. Tokyo Denki University (Japan) |
| Electronic tile (e-Tile) using electrophoretic e-Paper are expected to bring us energy-saving wall-displays. We have prototyped e-Tile of 10 cm square, and demonstrated 2 m square display panel using 400 e-Tiles. A hybrid color display system using e-Tiles and a projector was proposed and demonstrated. Prototypes of cubic displays were also demonstrated. | |
| EP1-2
13:20 |
Invited Reflective and Transparent Digital Out of Home Displays Enabled by Electrowetting *Doeke Jolt Oostra1, Hans Feil1 1. Etulipa (Netherlands) |
| Etulipa has installed first reflective digital out of home displays, based on Electro Wetting Display technology in the field. The high-speed switching of electrowetting cells enables displaying video content. The Cyan-Magenta-Yellow architecture yields very bright colors. Power consumption is 7W/m2, enabling to run the displays using solar power. Street furniture and applications in transparent shop window displays are expected to gain high ... | |
| EP1-3L
13:40 |
Versatile Optimization Strategies for High-Performance Flexible and Stretchable Electrochromic Displays *Wenting Wu1, Pooi See Lee1 1. Nanyang Technological University (Singapore) |
| Flexible and stretchable electrochromic displays (ECDs) are emerging soft electronics. To realize high-performance ECDs, versatile optimization strategies have been investigated including fabricating flexible and stretchable conductors, developing various gel electrolytes, and designing patterns. |
EP2: Diversity in Chromic Display Systems (1)
Dec. 4 14:50-16:10 Room 207
Chair: Norihisa Kobayashi (Chiba University)
Co-Chair: Bo-Ru Yang (Sun Yat-Sen Univ.)
| EP2-1
14:50 |
Invited Hybrids as Key Players for Enhanced Electrochromism *Aline Dominique Rougier1 1. ICMCB (France) |
| Electrochromism refers to an optical modulation under an applied voltage. In our group, combination of organic and inorganic parts leads to unusual properties such as enhanced memory effect for PEDOT-oxide based systems. In this presentation, the tuning of the EC properties with the nature of both organic and inorganic counterparts will be discussed. | |
| EP2-2
15:10 |
Invited Fabrication of Electrochromic Energy Storage Devices Containing Viologen Derivatives *Jong Seung Park1, Raksah Pal1, Soo Yeon Eom1 1. Pusan National University (Korea) |
| Electrochromic devices (ECDs) show reversible color changes via electron and ion transfers during redox reactions under voltage. Viologen derivatives, known for their electron-accepting capabilities, enhance ECD performance. These devices integrate energy storage and incorporate electrodes and ion storage layers, making them suitable for dual-functional windows in building and automobile applications. | |
| EP2-3
15:30 |
Invited Development of the Gasochromic Sheet Using Switchable Mirror Thin Film *Kazuki Yoshimura1, Yasusei Yamada2 1. Gifu University (Japan), 2. AIST (Japan) |
| The switchable mirror thin film, capable of transitioning between a transparent and mirrored state, is expected to make a significant contribution to reducing heating and cooling loads when incorporated into smart windows. In our research group, we have embarked on the development of switchable mirror sheets using the gasochromic method for switching. | |
| EP2-4
15:50 |
Self-Rechargeable Zn-Based Electrochromic Energy Storage Device with Photo-Annealed Electrospun TiO2 Nanofibers *Raksha Pal1, Jong S. Park1 1. Pusan National University (Korea) |
| Developing energy-efficient self-discharging electrochromic energy storage devices (EESDs) with organic electrochromic species is a difficult challenge. We addressed this by using photo-annealed electrospun titanium dioxide (TiO2) nanofibers as the ion-storage layer (ISL) and zinc (Zn) as the anode. These enhancements, coupled with the flexibility of Zn ISL-EESDs, facilitate the development of multifunctional smart windows. |
EP3: Diversity in Chromic Display Systems (2)
Dec. 4 16:40-18:00 Room 207
Chair: Shuichi Maeda (Tokai University)
Co-Chair: Masayoshi Higuchi (NIMS)
| EP3-1
16:40 |
Invited Yellow Conjugated Polymers Composed of Thiophene Derivative Donor and Aromatic Acceptor for Electrochromic Devices *Atsushi Aoki1, Akihito Ohshima1, Rika Adachi1 1. Nagoya Institute of Technology (Japan) |
| Conjugated polymers composed of thiophene derivative donor and aromatic acceptors such as phenyl, biphenyl and fluorenyl were prepared by Suzuki-Miyaura cross-coupling reaction. The color of these polymers indicates yellow in the reduced state whereas transparent blue for the polymer using phenyl acceptor P1, black for one using biphenyl P2 and dark green for one using fluorenyl P3 in the oxidized state. | |
| EP3-2
17:00 |
Invited Electrochemical Photoluminescence Modulation of Photofunctional Materials and Their Imaging Applications *Kazuki Nakamura1 1. Chiba University (Japan) |
| Based on our reported electrochemical reaction, this paper describes an overview of electrofluorochromism, a phenomenon that controls photoluminescence through a change in the redox states of functional molecules and metal complexes. In particular, control of luminescence properties will be introduced using the europium complex, one of the luminescent lanthanide complexes. | |
| EP3-3
17:20 |
Improvement of Coloration Property in Silver Deposition-Based Electrochromic Device with Organic Stabilizing Agents *Shun Uji1, Kotaro Umetani1, Nikhil C. Bhoumik2, Kazuki Nakamura1, Christopher J. Barile2, Norihisa Kobayashi1 1. Chiba University (Japan), 2. University of Nevada, Reno (United States of America) |
| We have reported an Ag deposition-based electrochromic (EC) device which can represent various optical states. In this study, a derivative of ethylenediaminetetraacetic acid was introduced into our EC device as a stabilizing agent to modulate the morphology of silver nanoparticles (AgNPs). As a result, anisotropic rod-shaped AgNPs were obtained in the electrochemical system. | |
| EP3-4L
17:40 |
Invited Development of Ag-Deposition-Based Electrochromic Devices with Microelectrodes for High-Speed Operation *Kazunori Miyakawa1, Shigeyuki Imura1, Masahide Goto1, Yuji Miyamoto1 1. NHK Science & Technology Research Laboratories (Japan) |
| This study presents the development of prototype electrochromic devices using silver deposition with miniaturized electrodes for high-speed operation. The results demonstrated that the device with 50 µm diameter circular microelectrodes achieved a transition from transparent to black in less than 0.5 s. |
EP4: Stretchability and Scalability in Nonvolatile Display Fabrication
Dec. 5 9:00-10:20 Room 107
Chair: Makoto Omodani (Tokyo Denki University)
Co-Chair: Takahiro Kamei (Sony)
| EP4-1
9:00 |
Invited Research on Social Implementation of Coatable Light-Dimming Film Using Functional Nanoparticle Dispersion Ink *Kazuki Tajima1, Ryo Taguchi1 1. National Institute of Advanced Science and Technology (Japan) |
| Windows in homes and automobiles are used to view the outside, but much sunlight enters the interior through the windows, contributing to increased air conditioning loads. In this presentation, the speakers will introduce the development of a coatable light-dimming film using functional nanoparticle dispersion ink, which was developed by the speakers to control sunlight entering through windows. | |
| EP4-2
9:20 |
Invited Highly Skin-Conformable Sensors and Displays *Naoji Matsuhisa1 1. The University of Tokyo (Japan) |
| We report highly skin-conformable sensors and displays with a thickness of only 6 µm and a low Young’s modulus of ∼10 MPa. The piezoelectric sensor enables the detection of motion around the attached area, and the electrochromic display is low-voltage operation and air-stable. Additionally, the devices show high gas permeability to prevent damage to the skin. | |
| EP4-3
9:40 |
Advanced Fiber Electrophoretic Display with Different Electrodes *Weichun Chen1, Hao Lu1, Simu Zhu1, Yifan Gu1, Feng Xiong1, Xinzao Wu1, Junjie He1, Zong Qing1, Peining Chen2, Bo-Ru Yang1, Shaozhi Deng1 1. Sun Yat-Sen University (China), 2. Fudan University (China) |
| Electrophoretic display fiber was prepared by a simple dip-coating process, which has high flexibility and stretchability. Different top transparent electrode fibers and electrophoretic display fibers were also prepared to form a display unit. This work demonstrates the great potential of electrophoretic displays for wearable textiles. | |
| EP4-4
10:00 |
High-Contrast and Skin-Conformable Electrochromic Displays by Self-Doped Conductive Polymers *Tokihiko Shimura1, Yicheng Zhu1, Taizo Tominaga1, Minoru Ashizawa2, Guangchao Liu3, Zhifan Ke3, Jianguo Mei3, Naoji Matsuhisa1 1. The University of Tokyo (Japan), 2. Tokyo Institute of Technology (Japan), 3. Purdue University (United States of America) |
| In this study, highly stretchable electrochromic displays (ECDs) were developed using self-doped conductive polymers, S-PEDOT and n-PBDF, to achieve high contrast without additives. These polymers exhibited high conductivity and stretchability, enabling thin, soft, wearable ECD devices suitable for on skin applications. |
EP5: Recent Progress on Electrochromic Displays
Dec. 5 10:50-11:50 Room 107
Chair: Yasuo Toko (Stanley Elec.)
Co-Chair: Shuichi Maeda (Tokai University)
| EP5-1
10:50 |
Invited A Viologen-Based Electrochromic Poly(Ionic Liquid) Resin *Hiroto Murakami1, Hironobu Tahara1 1. Nagasaki University (Japan) |
| We synthesized a viologen-based poly(ionic liquid) (VPIL(TFSI)) as an electrically conducting redox-active polymer resin. Although the VPIL(TFSI) is very viscous, it exhibits electrical conduction. An electrochromic performance of the device consisting of VPIL(TFSI) was investigated by cyclic voltammetry and spectroelectrochemistry in detail. | |
| EP5-2
11:10 |
Synthesis of Electrochromic Supramolecular Polymers Driven by Data Science *Aiwei Zhao1,2, Dines Chandra Santra1, Kenji Nagata1, Junya Sakurai1, Masahiko Demura1, Masayoshi Higuchi1,2 1. National Institute for Materials Science (Japan), 2. Osaka University (Japan) |
| Materials informatics has recently garnered significant attention as a potent tool for the development of a wide array of functional materials. In this paper, we report our recent approach on the search of electrochromic (EC) metallo-supramolecular polymers (MSPs) with the help of materials informatics. A coloration efficiency (CE) of 1281 cm2/C was obtained compared to our previous work. This method was useful to ... | |
| EP5-3
11:30 |
Developing a Novel Image Analytical Method for Studying the Electrochromic Properties of Metallo-Supramolecular Polymer-Based Electrochromic Devices *Shifa Sarkar1,2, Takefumi Yoshida1, Masayoshi Higuchi1,2 1. National Institute for Materials Science (Japan), 2. Osaka University (Japan) |
| This study introduces a novel image analytical method integrating advanced imaging techniques with quantitative analysis, providing a comprehensive understanding of the electrochromic behavior and performance of MSP-based solid-state ECDs. Results illustrate the effectiveness of this method in capturing real-time color changes, contrast, and uniformity of the electrochromic response. |
EPp1: Progress on Electronic Paper and Nonvolatile Displays
Dec. 5 13:50-15:10 Main Hall
| EPp1-1 | Phthalocyanine-Blend Silver Nanowires for Flexible Electrodes of Electrochromic Devices *Ye Won Choi1, Jong S. Park1 1. Pusan National University (Korea) |
| For electrochromic devices (ECDs), indium tin oxide (ITO) is widely used as transparent electrodes but suffers brittleness. Our study suggests replacing ITO with phthalocyanine (Pc) blended silver nanowires (AgNWs), offering superior conductivity, transparency, and flexibility. Pc forms an oxidation-resistant layer, mitigating AgNWs' oxidation issues. The resulting ECDs show high color efficiency and sufficient durability for flexible electronics. | |
| EPp1-2 | Fabrication of Electrochromic Devices with Copolymers Composed of Viologen and Liquid Crystal *Jaewon Choi1, Jong S. Park1 1. Pusan National University (Korea) |
| Significant focus has been placed on developing functionalized electrochromic materials. This study aims to produce diverse applications for electrochromic devices (ECDs). By Michael addition reaction, we synthesized copolymers made up of viologen and liquid crystals (LC) components. This approach effectively addresses the shortcomings of conventional ECDs. | |
| EPp1-3 | Research on High-Performance Electrophoretic Display Materials Based on Machine Learning *Yanjun Zhang1, Yuanhao Feng1, Jian Jin1, Wanlong Guo1, Zihao Wang1, Jujian Fu1, Yuan Ding1, Bojia Lyu1,2 1. Shanghai Tianma Microelectronics Co., Ltd (China), 2. Shanghai Jiao Tong University (China) |
| In order to improve the efficiency and shorten the cycle, this paper proposes a method of developing high-performance electrophoretic display materials based on machine learning. Experimental results indicate that the GRU model can effectively capture the performance variations under different conditions, validating the potential application of machine learning algorithms in the development of electrophoretic display materials. | |
| EPp1-4L | Inkjet Printing Application of Invisible Ink Made of Antimony-Doped Tin Oxide *Tetsu Hyodo1, Yuka Funawatari1, Shuichi Maeda1, Shigeki Takahashi2 1. University of Tokai (Japan), 2. Yamagata University (Japan) |
| We have synthesized antimony-doped tin oxide (ATO) inks. These inks are invisible in visible light, but recognizable in infrared light and can be used in the anti-counterfeiting. These inks were successfully adapted for digital printing by inkjet method. By changing the ATO concentration in the inks, it is possible to control invisibility in visible light and ease of recognition in near-infrared light. | |
| EPp1-5L | Control of Structural Color by Electrophoresis Using Polystyrene Nanoparticle Dispersion Solution with Different Polarity *Kota Akiyama1, Fumiyuki Shiba1, Norihisa Kobayashi1, Kazuki Nakamura1 1. Chiba University (Japan) |
| Electrical voltage was applied to dispersions solution including crosslinked polystyrene nanoparticles synthesized by soap-free emulsion polymerization. Structural color emerged through regular arrangement of nanoparticle by electrophoresis. The wavelength and reflectance value of the structural colors was affected by solution polarity. | |
| EPp1-6L | Electrically Controlled Liquid Metal Optical Device for Dynamic Reflection and Blocking *Reo Tazawa1, Yukihiro Kudoh1, Taiju Takahashi1 1. Kogakuin University (Japan) |
| We proposed an electrically controlled optical device capable of operating in two modes: reflection mode, where the surface of gallium-based liquid metal droplets, a liquid metal, is used as a mirror, and transmission mode, where the droplets function as an optical shutter. By arranging multiple channels in parallel, we confirmed the ability to control the irradiated light patterns on the screen. |
Workshop on MEMS and Emerging Technologies for Future Displays and Devices
| Dec. 4 | 13:00-14:20 | Mid-sized Hall A | MEET1 | Novel Materials, Fundamental Components and Process Technologies |
| Dec. 4 | 14:50-16:10 | Mid-sized Hall A | MEET2 | Micro/NanoDisplays and Nanotechnology Applications (1) |
| Dec. 4 | 16:40-18:00 | Mid-sized Hall A | MEET3 | Micro/NanoDisplays and Nanotechnology Applications (2) |
| Dec. 5 | 9:00-10:20 | Conference Hall | MEET4 | Micro/NanoDisplays and Nanotechnology Applications (3) |
| Dec. 5 | 10:50-12:10 | Conference Hall | MEET5 | Micro/NanoDisplays and Nanotechnology Applications (4) |
| Dec. 5 | 13:30-14:50 | Conference Hall | MEET6 | Micro/NanoDisplays and Nanotechnology Applications (5) |
| Dec. 5 | 15:20-16:40 | Conference Hall | MEET7 | EL Quantum Dots Technologies |
| Dec. 5 | 17:10-18:30 | Conference Hall | MEET8 | Emerging Quantum Dots and Nanotechnologies (1) |
| Dec. 6 | 9:00-10:00 | Conference Hall | MEET9 | Emerging Quantum Dots and Nanotechnologies (2) |
| Dec. 6 | 10:50-12:10 | Conference Hall | MEET10 | Emerging Quantum Dots and Nanotechnologies (3) |
| Dec. 6 | 13:50-15:10 | Main Hall | MEETp1 | Micro/NanoDisplays and Their Novel Materials/Components/Process Technologies |
MEET1: Novel Materials, Fundamental Components and Process Technologies
Dec. 4 13:00-14:20 Mid-sized Hall A
Chair: Francois Templier (CEA-LETI)
Co-Chair: JangHyuk Kwon (Kyung Hee University)
| MEET1-1
13:00 |
Invited Environmentally Friendly Luminescent Mn-Based Organic-Inorganic Hybrid Halide Series *Erkul Karacaoglu1,2, F.N.U. Joshua1, Carlos Flores1, Andre J. Gesquiere1, Lei Zhai1, Yajie Dong1 1. University of Central Florida (United States of America), 2. Karamanoglu Mehmetbey University (Turkey) |
| FTIR and Raman analysis peaks are associated with organic components and confirms the successful incorporation of MnCl2 into the hybrid structure. PL studies indicate excitation at both UV and blue wavelengths, with (TPA)2(MnCl2) demonstrating the highest emission intensity at RT. Temperature-dependent PL measurements show thermal stability up to 200°C. These findings contribute to understanding the potential optoelectronic device ... | |
| MEET1-2
13:20 |
Invited Quantum Technology Using Modern Materials Engineering to Create Better Qubit With Lower Error Rates *Robert Jan Visser1,2, Ruoyu Li1, Zihao Yang1, Jake Rochman1, Leslie Du1, Haoxiong Yang1, Nag Patibandla1, Mingwei Zhu1, Matthew Guibord1 1. Applied Materials (United States of America), 2. Materials Research Society (United States of America) |
| Quantum technology promises to be a new paradigm for important fields including computation, communication and metrology. Materials engineering of quantum devices is critical to achieve high fidelity performance. This paper describes how integrated cluster tools can enable high quality interfaces for superconducting quantum devices. | |
| MEET1-3
13:40 |
Invited Carbon Nanotube Based Cold Cathode Electron Beam (C-beam) for Semiconductor Manufacturing Process *Kyu Chang Park1, Iksu Kim1, Umesh Balaso1 1. Kyung Hee University (Korea) |
| Cold cathode-based electron beam (C-beam) is one of the crucial sources for semiconductor manufacturing process. We developed various C-beams for extreme ultraviolet lighting, scanning electron microscope, holes drilling for fine metal mask, and x-ray. Detail of C-beam development status for EUV lighting, hole drilling, microscope and x-ray application would be presented. | |
| MEET1-4L
14:00 |
Invited Enabling Outdoor-Compatible Smart Glasses Using Single Sheet Waveguide Displays *Rami Hourani1, Samarth Bhargava1, Michael Weinstein1, Ludovic Godet1, Paul Meissner1 1. Applied Materials (United States of America) |
| The combination of high efficiency, great cosmetics and excellent image quality are key features for consumer-ready augmented reality displays. The Photonics Platforms Business at Applied Materials leveraged already existing and scalable 300mm wafer fabrication equipment to demonstrate high performance devices by co-optimization of design, process and materials. This talk reveals technologies that enable brand worthy products and the path to mass production |
MEET2: Micro/NanoDisplays and Nanotechnology Applications (1)
Special Topic of Interest on Micro/Mini LEDs
Dec. 4 14:50-16:10 Mid-sized Hall A
Chair: Qun Yan (Fuzhou University)
Co-Chair: Francois Templier (CEA-LETI)
| MEET2-1
14:50 |
Invited Non-Display Applications and Architectures for MicroLED Systems *Ioannis Kymissis1, Vikrant Kumar1, Keith Beherman1 1. Columbia University (United States of America) |
| While microLEDs offer extraordinary performance for use in displays, an emerging area for microLEDs is in non-display applications. In this presentation we will discuss a number of these systems, the differences in architecture required for success, and both the performance advantages and challenges posed in applying microLEDs to these applications. | |
| MEET2-2
15:10 |
Invited Submicron Narrow-Band Phosphors in Luminescent Color Filters and Next-Generation MiniLED and MicroLED Displays *James E Murphy1, Derrick Brewer2, Samuel Camardello1, Zeying Chen2, Daniel DePuccio2, Felippe Pavinatto2, James Presley2, Anant Setlur2, Oltea Siclovan2, Aharon Yakimov2, Jie Yue2, Robert Davis2 1. Dolby (United States of America), 2. GE (United States of America) |
| GE's KSF narrow red phosphor demonstrates the best possible red color point, reliability, and efficiency. Here we describe recent advancements in submicron narrow-band phosphors which are being implemented in next-generation miniLED displays, and being considered for enabling full-color microLED and luminescent color filter displays of the future due to their excellent optical performance and robust nature. | |
| MEET2-3
15:30 |
Invited Investigation of Red Micro-LED Efficiency Improvement by Various Passivations Mengyuan Zhanghu1, Byung-Ryool Hyun1, Ke Zhang2, *Zhaojun Liu1,2 1. Southern University of Science and Technology (China), 2. Sitan Semiconductor International Co. Limited (Hong Kong) |
| High-efficiency red Micro-LEDs are crucial components for full-color Micro-LED displays. In this study, we systematically investigate the efficiency and performance of red AlGaInP Micro-LEDs with varying sizes and dielectric passivation layers fabricated using PECVD, ALD, and sol-gel methods. Additionally, we successfully demonstrate 0.18-inch monochrome red displays featuring AlGaInP Micro-LEDs with a chip size of 9.5 µm and a pixel pitch of 12.5 µm. | |
| MEET2-4
15:50 |
Invited Simultaneous Transfer and Bonding (SITRAB) Technology for MicroLED Display Fabrication *Jungho Shin1, Jiho Joo1, Gwang-Mun Choi1, Chanmi Lee1, Ki-Seok Jang1, Jin-Hyuk Oh1, Ji-Eun Jung1, Ga-Eun Lee1, Seong-Cheol Kim1, Yong-Sung Eom1, Kwang-Seong Choi1 1. Electronics and Telecommunications Research Institute (Korea) |
| Herein, we report a simultaneous transfer and bonding (SITRAB) technology for Micro-LED display fabrication. Micro-LEDs attached on mother substrates are transferred and bonded onto display substrates after the SITRAB-based Micro-LED assembly. By repeating this SITRAB process with different interposers, Micro-LED repair and RGB integration are experimentally demonstrated. |
MEET3: Micro/NanoDisplays and Nanotechnology Applications (2)
Special Topic of Interest on Micro/Mini LEDs
Dec. 4 16:40-18:00 Mid-sized Hall A
Chair: Zhaojun Liu (Southern University of Science and Technology)
Co-Chair: Chien-Chung Lin (National Taiwan University)
| MEET3-1
16:40 |
Invited Inorganic Halide Perovskite Color Conversion Thin-Films for High-Resolution, Small Pixel-Pitch MicroLEDs Displays *Francois Templier1, Elsa Parrat1, Stephane Altazin1, Florian Dupont1 1. CEA-LETI (France) |
| Green and Red-emitting, thin-film Perovskite CCLs exhibit very narrow emission band, opening the possibility to covering 90% of the color space defined by Rec. 2020. They show very high absorption which allows to envisage CCL thicknesses of only ∼ 500 nm, which paves the way to reaching pixel-pitches below 1 µm. These films exhibit very promising stability under high optical power. | |
| MEET3-2
17:00 |
Invited Recent Development and Simulation Study of Micro-LEDs *Qun Yan1,2, Jun He1, Kaixin Zhang1, Xuehuang Tang1, Zhonghang Huang2, Jie Sun1,2 1. Fuzhou University (China), 2. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China (China) |
| We have developed several technologies to address the challenge of mass production of Micro-LED display. Optical simulation as one of important tools is applied to improve the luminous efficiency and shaping the light distribution of Micro-LED display. The results of simulation and process technology development will be presented in this talk. | |
| MEET3-3
17:20 |
Invited Monolithic RGB Micro-LED Arrays on Silicon with Directional Emission Pave the Way to Cost Effective High Brightness Low Power Consumption Micro-Displays for Augmented Reality *Ivan-Christophe Robin1, Mehdi Daanoune1, Mathieu Charbonnier1, Pierre Tchoulfian1, Benoit Amstatt1, Philippe Gilet1 1. Aledia (France) |
| Aledia has developed a technology allowing to grow on 200 mm or 300 mm Si wafers GaN nanowires (NWs). Those NWs can be used for manufacturing LED structures and Aledia has developed a technology allowing to grow in the same growth run the Red, Green and Blue active regions of a RGB array with a subpixel pitch that can be reduced down to 1.25 µm. This allows to ... | |
| MEET3-4
17:40 |
Invited The Road to Commercialization and Mass Production of MicroLEDs *Tongtong Zhu1 1. Porotech (UK) |
| We established the world's first semiconductor microLED ecosystem with partners. It successfully bonded 0.12-inch micro-displays on 8-inch GaN on silicon wafers, completely rewriting the rules of next-generation lighting technology. We will steadily achieve the mass production of AR products, including AR glasses, micro-projectors, micro-displays, and various wearable devices. |
MEET4: Micro/NanoDisplays and Nanotechnology Applications (3)
Special Topic of Interest on Micro/Mini LEDs
Dec. 5 9:00-10:20 Conference Hall
Chair: Chien-Chung Lin (National Taiwan University)
Co-Chair: Zhaojun Liu (Southern University of Science and Technology)
| MEET4-1
9:00 |
Invited A Color Field Sequential MicroLED Zonal Illuminator *Christopher Bower1, Erich Radauscher1, Imre Knausz1, Nikhil Jain1, Geoff Bradshaw1, Matthew Meitl1, Kevin Dao2, Yun Wang2, Yung-Yu Hsu2 1. X Display Company (XDC), Inc. (United States of America), 2. Meta Platforms, Inc. (United States of America) |
| Liquid-Crystal-on-Silicon (LCoS) displays are crucial in augmented reality (AR) systems for their high resolution and small form. This manuscript explores the architecture, fabrication, and performance of a microLED zonal illuminator (ZI) to enhance image contrast and power savings in future LCoS-based optical engines. Prototype ZIs utilizing elastomer-stamp-transferred flip-chip microLEDs and driver microICs are presented. | |
| MEET4-2
9:20 |
Invited Opportunities and Challenges in the Commercialization of MicroLED Display Technology *Ying-Tsang Liu1, Ching-Liang Lin1, Tzu-Yang Lin1, Yun-Li Li1 1. PlayNitride Display Co., Ltd. (Taiwan) |
| MicroLED display technology boasts high brightness, wide color gamut, high aperture ratio, and exceptional reliability. As it advances towards mass production, MicroLED is ideal for traditional displays and innovative technologies like AR glasses, transparent displays, and electric vehicles. This versatility broadens its applications, but the key challenge is rapidly reducing costs to enable widespread adoption. | |
| MEET4-3
9:40 |
Invited From Concept to Reality: Current Applications of MicroLED Displays *Reza Chaji1 1. VueReal Inc (Canada) |
| This talk explores the transformative potential of microLED technology in various industries. It highlights immediate, real-world applications, from advanced smartphones and wearables to large-scale digital signage, emphasizing how microLEDs are revolutionizing display technology with superior performance, reliability, and extra ordinary new features. | |
| MEET4-4
10:00 |
Invited Narrowing the Emission Linewidth of Non-toxic I-III-VI Quantum Dots for Display and Other Applications *Hunter McDaniel1, Maharshi Dey1, Riley Kelahan1, Ron Cichocki1, Nikolay Makarov1 1. UbiQD, Inc. (United States of America) |
| In recent years, I-III-VI semiconductor (eg, CuInS2) quantum dots (QDs) have shown significant improvements that have unlocked new capabilities and end markets. We update on recent progress narrowing the emission linewidth of I-III-VI QDs that are becoming competitive with legacy QDs used in displays and lighting, and we discuss new applications for these materials beyond display. |
MEET5: Micro/NanoDisplays and Nanotechnology Applications (4)
Special Topic of Interest on Micro/Mini LEDs
Dec. 5 10:50-12:10 Conference Hall
Chair: Reza Chaji (VueReal Inc.)
Co-Chair: Kyu Chang Park (Kyung Hee University)
| MEET5-1
10:50 |
Invited Ferroelectric TFTs for Next Generation Memory and Display *Jin Jang1, Taebin Lim1, Heonbang Lee1, Samiran Roy1 1. Kyung Hee University (Korea) |
| We review our results on ferroelectric-semiconductor field-effect transistor (FeS-FET). The fabricated In2Se3 FeS-FET shows a large hysteresis window. We have developed a new ferroelectric ZrAlO (ZAO) which can be used for GI for FETs. In this talk, I will explain our recent results on 2D ferroelectric TFTs using gamma phase In2Se3 and oxide TFTs with ... | |
| MEET5-2
11:10 |
Invited Metal Oxynitride Semiconductor Prepared by Reactive Sputtering of Metal Oxide Target for Thin Film Devices Yuseong Jang1, *Soo-Yeon Lee1 1. Seoul National University (Korea) |
| In this paper, a metal oxynitride semiconductor was grown by radio-frequency reactive sputtering of metal oxide target. We highlight the potential of this material, featuring a small bandgap energy with passivation of oxygen vacancy, by comparing the performance of thin film devices using a metal oxide semiconductor. | |
| MEET5-3
11:30 |
Invited A New Architecture of Active-Matrix Micro-LED Displays Featuring Full-Screen Photosensing without Photosensors Su-Hyeong Kim1, Won-Been Jeong1, *Seung-Woo Lee1 1. Kyung Hee University (Korea) |
| A new architecture of active-matrix micro-LED displays is presented. It features full-screen photosensing without any additional photosensors. Micro-LEDs in a display panel can be used as photo-sensors, which enables security features that recognize multiple fingerprints anywhere on the screen. | |
| MEET5-4
11:50 |
Invited 5,000 PPI High-Density Vertical Stack R/G/B Micro-LED Pixel Architectures Fabricated by Unconventional Epitaxy *Young Joon Hong1 1. Sungkyunkwan University (Korea) |
| We report remote and van der Waals epitaxy for fabricating high-density vertical R/G/B micro-LED pixel architectures. These non-covalent epitaxy techniques enable easy mechanical delamination and subsequent stacking of epi-layers, which are then precisely patterned using photolithography to form high-density pixel arrays. Our method offers a promising solution for precise LED alignment in ultra-high-resolution displays (e.g., AR and XR). |
MEET6: Micro/NanoDisplays and Nanotechnology Applications (5)
Special Topic of Interest on Micro/Mini LEDs
Dec. 5 13:30-14:50 Conference Hall
Chair: James Murphy (GE Research)
Co-Chair: Seung-Woo Lee (Kyung Hee University)
| MEET6-1
13:30 |
Invited Recent Progress in The Colloidal-Quantum-Dot-Based Color Conversion Layer Better Than 3000 Pixel-Per-Inch *Chien-Chung Lin1,2, Kai-Ling Liang2, Wei-Hung Kuo2, Ting-Jhih Kuo1, Chien-Yu Lu1, Yen-Hsiang Fang2 1. National Taiwan University (Taiwan), 2. Industrial Technology Research Institute (Taiwan) |
| In this talk, we will discuss the performances of the high resolution color conversion layer consisting of colloidal quantum dot pixels. The patterning of such materials into a confined area less than 25 micron square is a difficult task for both direct dispense and photolithography. A high quantum-dot emission can be demonstrated if suitable optical reflector can be added. | |
| MEET6-2
13:50 |
Invited High-Throughput MicroLED Wafer Inspection: Challenges and Solutions *David Lewis1, Noam Shapiro1, Ori Dadoosh1 1. InZiv (Israel) |
| microLED display technology holds immense promise, but manufacturers face challenges in microLED wafer inspection, leading to low yields. Traditional electroluminescence (EL) inspection is slow and damaging, hindering mass production. InZiv's technology solves these critical problems with a damage-free, high-speed EL solution for various microLED designs, resulting in higher yields. | |
| MEET6-3
14:10 |
Invited Adoption of the Semiconductors Industry Best Known Methods to Enhance the Yield of Micro-LED Fabrication *Makarem Hussein1 1. LuxNour Technologies (United States of America) |
| Focusing on several micro-LED fabrication modules, we demonstrate how the employment of semiconductors industry Best Known Methods (BKM) may improve the fabrication process and enhance the yield of micro-LEDs fabrication. Alternatives to photoresist metal lift-off deposition and custom requirements mandated by the choice of massive transfer methods will be addressed. | |
| MEET6-4
14:30 |
Invited Is AR the Future of MicroLED? *Raphael Mermet-Lyaudoz1, Eric Virey1, Zine Bouhamri1 1. Yole Group (France) |
| MicroLEDs could theoretically address a wide range of applications and slew of prototypes surge on tradeshows. Nevertheless, mass-volume commercial products are still a long time coming. This article explores the possibility for microLED to address AR with microdisplays - sometimes called LED-on-Si. As a true fit exists between the technology and its use in AR, we expect the market could grow significantly with a 90% 23-29 CAGR. |
MEET7: EL Quantum Dots Technologies
Special Topic of Interest on Quantum Dot Technologies
Dec. 5 15:20-16:40 Conference Hall
Chair: Kyu Chang Park (Kyung Hee University)
Co-Chair: Hsueh-Shih Chen (National Tsing Hua University)
| MEET7-1
15:20 |
Invited Development of New Narrow Band Green and Red Phosphors for Display and General Lighting Applications *Samuel J Camardello1, James E Murphy1, Malgorzata Sojka2, Oltea P Siclovan2, Anant A Setlur2, Zeying Chen2 1. Dolby (United States of America), 2. GE (United States of America) |
| We discuss the performance of GE's new narrow band green and red phosphors for wide color gamut display and general lighting applications. Other phosphor performance metrics such as response time, thermal quenching and environmental stability will be discussed. The performance metrics will be compared to the performance of other commercial solutions for displays and general lighting. | |
| MEET7-2
15:40 |
Invited Exciplex Sensitized InP-based Quantum Dot Light Emitting Diodes for Long Device Lifetime *Jang Hyuk Kwon1, Thi Thuy Truong1, Nisha Vergineya S1 1. Kyung Hee University (Korea) |
| Here, we report on the efficiency and long lifespan of inverted green InP-based QLEDs that use an exciplex as EHL. The exciplex EHL is composed of KHU-A as n-type material and ([1,1'-biphenyl]-4-yl).-9'-phenyl-9H,9'H-3,3'-bicarbazole (BPP-BCZ) as a p-type material. The optimized device with a exciplex EHL (6:4 ratio) showed a peak EQE of 17.3% and an expected device lifespan (LT50) of 1881 hours ... | |
| MEET7-3
16:00 |
Invited Engineering Charge Transport Layers for High-Performance Quantum Dot Light-Emitting Diodes *Jeonghun Kwak1 1. Seoul National University (Korea) |
| Charge transport layers (CTLs) significantly influence on the performance of quantum dot light-emitting diodes (QLEDs) by modulating the charge balance and exciton quenching. In this work, we will discuss the key roles of the CTL on the performance of QLEDs. | |
| MEET7-4
16:20 |
Invited Blue Quantum Dots for QLED Display Applications *Chenhui Wang1, Haizheng Zhong1 1. Beijing Institute of Technology (China) |
| Aiming to solve the challenge of blue QLEDs toward display applications, we report on the development of ZnSe-based quantum dots as potential blue emitters. |
MEET8: Emerging Quantum Dots and Nanotechnologies (1)
Special Topic of Interest on Quantum Dot Technologies
Dec. 5 17:10-18:30 Conference Hall
Chair: JangHyuk Kwon (Kyung Hee University)
Co-Chair: Heesun Yang (Hongik University)
| MEET8-1
17:10 |
Invited Recent Progress of Cd-Free Quantum Dot Light-Emitting Diodes Displays *Myoungjin Park1, Jaekook Ha1, Sehun Kim1, Youngmo Koo1, Donghoon Kwak1, Yeo-Geon Yoon1, Changhee Lee1 1. Samsung Display Co., Ltd. (Korea) |
| Recently, Quantum Dot Light-Emitting Diodes (QD-LEDs) has emerged as a promising candidate for the next display technology. In this paper, we provide current status and recent progress of Cd-free QD-LEDs (EL-QD), focusing QD materials, devices and inkjet technologies. | |
| MEET8-2
17:30 |
Invited Progress in Direct Photolithography of R/G/B Quantum Dots for Full-Color Displays Di Zhang1, *Zhuo Li1, Shaoyong Lu1, Dong Li1, Zhuo Chen1, Yanzhao Li1, Xinguo Li1, Xiaoguang Xu1 1. BOE Technology Group Co., Ltd. (China) |
| Quantum dots had become star materials in the field of display due to adjustable and narrow emission peak. In this work, the high resolution full-color QD arrays and QLED devices were successfully prepared by direct photolithography. Finally, a 4.7-inch 650 ppi AMQLED prototype was eventually achieved. | |
| MEET8-3
17:50 |
Invited Towards the Commercialization of QLED Display Technology Through Ink-Jet Printing *Hanlun Wu1, Yiran Yan1, Xiongfeng Lin1, Longjia Wu1, Wenjun Hou1, Weiran Cao2, Xin Zhang2, Xiaolin Yan1 1. TCL Research (China), 2. TCL CSOT (China) |
| Herein, the IJP QLEDs were optimized via selection of functional materials, formulation of inks, as well as printing process control to achieve production-ready performances. Also the operation and storage stability of QLEDs were extensive studied and optimized to meet the reliability requirements. | |
| MEET8-4
18:10 |
Invited Surface Chemistry of Cd-Free QDs as a Main Bottleneck in Development of Quantum Dot Ink-Jet Inks *Igor Nakonechnyi1, Valeriia Grigel1, Willem Walravens1 1. QustomDot BV (Belgium) |
| We present a process flow that begins with the synthesis of cadmium-free quantum dots (QDs) and leads to the formulation of a solvent-free, acrylate-based ink. This work emphasizes the importance of the QDs surface chemistry modification to ensure QD stability and processability under ambient conditions, while maintaining their optical properties, efficiency and photostability. |
MEET9: Emerging Quantum Dots and Nanotechnologies (2)
Special Topic of Interest on Quantum Dot Technologies
Dec. 6 9:00-10:00 Conference Hall
Chair: Haizheng Zhong (Beijing Institute of Technology)
Co-Chair: Jeonghun Kwak (Seoul National University)
| MEET9-1
9:00 |
Invited Room-Temperature Synthesis of Red-Emitting Perovskite Quantum Dots *Akito Masuhara1 1. Yamagata University (Japan) |
| Perovskite quantum dots (PeQDs) exhibit exceptional optical properties. However, owing to their low structural stability, reports on red emissive PeQDs are inferior to those on green or blue emissive PeQDs. In this paper, we introduce two methods, which do not involve the introduction of polar solvents into the fabrication process. | |
| MEET9-2
9:20 |
Invited Fabrication of Infrared Quantum Dots for Electroluminescence, Photodetection and Up-Conversion Applications *Hsueh-Shih Chen1 1. National Tsing Hua University (Taiwan) |
| Quantum dots (QDs) have emerged as a leading nanomaterial, spurring significant advancements in electroluminescence (EL), photodetection (PD), and up-conversion technologies. This presentation will highlight our recent developments in the application of infrared (IR) PbS QDs. These innovations are advancing IR technology and exploring the future potential of QDs in EL, PD, and upconversion applications. | |
| MEET9-3
9:40 |
Surface Modification of Perovskite Quantum Dots by Comprehensive Ligand Design for LED Applications *Taisei Kimura1, Kenshin Yoshida1, Kohei Narazaki1, Satoshi Asakura2, Takayuki Chiba1, Akito Masuhara1 1. Yamagata University (Japan), 2. Ise Chemicals Corp. (Japan) |
| While perovskite quantum dots (PeQDs) have attracted attention due to their excellent optical properties, their performance can be further improved by optimizing their ligands. In this study, we report a more than twofold enhancement in the external quantum efficiency (EQE) of PeQDs-based light-emitting diodes (LEDs) through designing unique ligands for LEDs applications. |
MEET10: Emerging Quantum Dots and Nanotechnologies (3)
Special Topic of Interest on Quantum Dot Technologies
Dec. 6 10:50-12:10 Conference Hall
Chair: Kyu Chang Park (Kyung Hee University)
Co-Chair: Soo-Yeon Lee (Seoul National University)
| MEET10-1
10:50 |
Invited Full-Color QDLEDs with Dual-Color Pixels Fabricated by Inkjet Process *Jang-Kun Song1, Young-Jae Ko1, Gyu Jin Shin2, Jun Hyup Lee2 1. Sungkyunkwan University (Korea), 2. Soongsil University (Korea) |
| We demonstrate all solution-processed full-color QDLEDs with dual-color pixels. Full color is achieved by two types of sub-pixels with dual color emission, which is clearly differentiated from usual three-subpixel displays. The dual color subpixels have tandem structures. This novel structure can be a good solution for high resolution displays using QDs. | |
| MEET10-2
11:10 |
Invited Comparative Optical Properties of Eco-Friendly Green Quantum Dot Emitters *Heesun Yang1, Hyun-Min Kim1, Yuri Kim1, Yang-Hee Kim1, Seong Min Park1, Goo Min Park1, Yongwoo Kim1, Donghyeok Shin1, Sin Won Choi1, Seunghyeok Ryu1 1. Hongik University (Korea) |
| Three types of green-emitting quantum dots (QDs) with eco-friendly compositions of InP, ZnSeTe, and Ag-In-Ga-S are elaborately synthesized with optimal heterostructural design and compared in terms of photoluminescence and absorption characteristics. | |
| MEET10-3
11:30 |
Invited Emerging Surface Light Emitters and Detectors with Semiconductor Nanowires for Display, Sensing, and Beyond *Songrui Zhao1, Mohammad Vafadar1, Milad Fathabadi1, Yunqiu Chen1, Shichen Li1 1. McGill University (Canada) |
| In recent years, group-III nitride nanowires have emerged as a promising path for photonic devices such as nano/micro scale light emitting devices and novel photodetectors. In this talk, we will discuss recent developments on surface light emitting devices and photodetectors using epitaxial group-III nitride nanowires. | |
| MEET10-4
11:50 |
Improved Thermal Stability of Perovskite Quantum Dots by Focusing on Suppress of Ligand Desorption *Ryo Oba1, Naoaki Oshita1, Satoshi Asakura2, Akito Masuhara1 1. Yamagata University (Japan), 2. Ise Chem. Corp. (Japan) |
| Perovskite quantum dots are expected to be applied in wavelength conversion films for next-generation displays because of their excellent optical properties. In this study, we succeeded in preparing PeQDs with thermal stability, which is important for the practical use of wavelength conversion films, by a simple synthesis method and in fabricating films with practical optical properties in a heating process oriented toward industrial production methods. |
MEETp1: Micro/NanoDisplays and Their Novel Materials/Components/Process Technologies
Dec. 6 13:50-15:10 Main Hall
| MEETp1-1 | Analysis the Correlation between Electron Beam Performance and EUV Lighting *Umesh Balaso Apugade1, Iksu Kim1, Kyu Chang Park1 1. Kyung Hee University (Korea) |
| We utilize vertically aligned carbon nanotube (CNT) based cold cathode electron beam (C-beam) as a field emitter to irradiate metallic anode target for the generation of EUV light. EUV lightning is influenced by C-beam irradiation condition. This study aims to analyze the correlation between electron beam performance and EUV lighting efficiency. | |
| MEETp1-2 | Analysis of Electron Beam Performance with Various Emission Area Design for C-Beam *Ravindra Patil1, Aniket Karande1, Kyu Chang Park1 1. Kyung Hee University (Korea) |
| The study focuses on the impact of emission size areas on the performance of C-beams, a critical component in numerous advanced technological applications. We performed a comprehensive analysis of C-beams with varying emission size areas and shapes to determine their influence on key beam performance parameters. | |
| MEETp1-3 | Development of Single Emitter C-Beam for Ultra-High-Resolution Electron Microscopy *Aniket Ananda Karande1, Ravindra Patil1, Kyu Chang Park1 1. Kyung Hee University (Korea) |
| This study introduces a single-emitter electron source fabricated using DC-PECVD on a silicon substrate. The experiment was conducted using a triode configuration, which gave an electron transmission efficiency of 82% The system produced an emission current of 8.5 μA and an anode current of 7.0 μA. The reduced beam brightness was measured is 1.08 × 108 A/sr/m2/V. These results enhancing the potential for high-resolution ... | |
| MEETp1-4 | High-Performance Blue ZnSeTe Electroluminescent Device: Impacts of Heterostructural Core/Shell Design and Bisulfite-Functionalized Electron Transport Layer *Yang-Hee Kim1, Sin Won Choi1, Yongwoo Kim1, Goo Min Park1, Donghyeok Shin1, Changhoon Lee1, Heesun Yang1 1. Hongik University (Korea) |
| We explore outstanding electroluminescent performance of ZnSeTe quantum dots (QDs) by controlling the heterostructural design of core/shell ZnSeTe QDs and modifying the surface of electron transport layer (ETL). The blue device, incorporating optimized blue QDs and a modified ETL surface, delivers a peak luminance of 34074 cd/m2 and a EQE up to 12.4%, but long device lifetime(T50) of 61.6 h at 1000 ... | |
| MEETp1-5 | Impacts of Halide Ion on Optical Properties of Green-Emissive Ag-In-Ga-S Quantum Dots *Yuri Kim1, Seong Min Park1, Seunghyeok Ryu1, Hyun-Min Kim1, Beom Gyu Kim 1, Heesun Yang1 1. Hongik University (Korea) |
| Ag-In-Ga-S (AIGS) quantum dots (QDs) have emerged as environment-benign visible emitters alternative to InP counterparts. We perform metal halides-based synthesis of green-emissive AIGS QDs and examine the effects of type of halide on their growth kinetics and optical properties. Iodide is found to be the most beneficial toward high, narrow emissivity, resulting in photoluminescence quantum yield (PL QY) of 84% and bandwidth of 34 nm after Ga-compound ... | |
| MEETp1-6 | Optical and Electrochemical Performance of Tungsten Oxide Thin Films Prepared on Indium Tin Oxide Electrodes *Kodai Numata1, Keisuke Washo1, Kyung Ho Kim1 1. Kitami Institute of Technology (Japan) |
| WOx thin films were prepared on ITO electrode with low and high sheet resistances. The electrochemical performance of EC device using ITO with low sheet resistance was enhanced, while the average transmittance values of EC with high sheet resistance at colored and bleached states was higher than those of EC using ITO with low sheet resistance. | |
| MEETp1-7 | Effect of N2O Annealing on the Performance of Crystal IGTO TFTs *Jiwon Sun1, Yuna Kim1, Seungchae Jung1, Taebin Lim1, Jin Jang1 1. Kyung Hee University (Korea) |
| We report the effect of N2O post fabrication annealing on the performance of crystal indium-gallium tin oxide (c-IGTO) thin film transistors (TFTs). The c-IGTO exhibit improved operation stability under positive bias temperature stress (PBTS) conditions of threshold voltage shift of −0.5 V after N2O post-fabrication annealing. | |
| MEETp1-8 | Enhanced Electrical Performance of Dual-Gate InGaO TFT by Ar/O2 Plasma Exposure *Yuna Kim1, Jiwon Sun1, Seungchae Jung1, Jin Jang1 1. Kyung Hee University (Korea) |
| We investigated the enhancement of the electrical characteristics of dual-gate (DG) amorphous indium gallium oxide (a-IGO) TFTs with a back-channel-etched structure using Ar/O2 plasma treatment. For the DG structure, the field-effect mobility increased by 21.1%, the subthreshold swing decreased by 36.3%, and stability was maintained under positive bias temperature stress. | |
| MEETp1-9 | Polymer-Quantum Dot Ternary Bulk-Heterojunction InGaZnO Phototransistor for Effective Infrared Detection *Seungchae Jung1, Hansol Jeong1, Yuna Kim1, Jiwon Sun1, Jin Jang1 1. Kyung Hee University (Korea) |
| We demonstrate infrared detecting phototransistor with amorphous indium gallium zinc oxide thin film transistor and ternary organic polymer bulk-heterojunction blended with lead sulfide quantum dots as photo absorption layer. The device showed 109 A/W at 0.1mW/cm2 in exposure to 1650nm light source and response time of 133/199ms. | |
| MEETp1-10L | Study on Enhancing the Color Gamut of Mini-LED Backlighting Using Quantum Dot Technology and Analysis of Thermal Effects *Yun-Zhen Liu1, Chin-Cheng Weng2, Yung-Ting Chen1, Pei-Chun Chen1, Kazuto Nishikawa3, Teisou Kan3, Frank Huang4, Hung-Pin Hsu1, Yi-Ping Wang1 1. Ming Chi University of Technology (Taiwan), 2. Industrial Technology Research Institute (Taiwan), 3. TOPCON Technohouse Corporation (Japan), 4. Denkei Technical Partner (Taiwan) |
| Quantum dots technology enhances the color gamut of Mini-LED backlighting, improving LCD display performance. This study uses electroluminescence's temperature and injection current dependence to measure optoelectronic properties. When increased temperature and current raise sample temperature, causing a redshift in emission peaks. Thus, thermal accumulation affects Mini-LED arrays in wide color gamut applications. | |
| MEETp1-11L | Evaluation of Novel Carbon Quantum Dot for VR & Retina Illuminations Chung-Jen Ou1, *Duan-Yi Hong2,3, Ching-Nan Chuang1 1. Coretronic Corp. (Taiwan), 2. Academia Sinica (Taiwan), 3. National Taipei University of Technology (Taiwan) |
| This study evaluates the feasibility of incorporating carbon quantum dot (CQD) for flexible backplanes. It examines CQD film fabrication, spectral properties, and evaluate the equivalence effectiveness to both the cell and animal experiment validation, highlighting CQD's potential for retinal illumination and extended applications. |
Workshop on Display Electronic Systems
| Dec. 5 | 13:30-14:50 | Small Hall | DES1 | Low Power Display Technology |
| Dec. 5 | 15:20-16:40 | Small Hall | DES2 | Driver Circuit for Micro-LED and OLED |
| Dec. 5 | 17:10-18:10 | Small Hall | DES3/VHF5 | Automotive Display Technologies and Driver Safety |
| Dec. 6 | 10:50-12:10 | Room 108 | DES4 | Display System Technologies for AR/VR |
| Dec. 5 | 11:10-12:30 | Main Hall | DESp1 | Display Electronic Systems |
DES1: Low Power Display Technology
Dec. 5 13:30-14:50 Small Hall
Chair: Chih-Wen Lu (National Cheng Kung University)
Co-Chair: Reiji Hattori (Kyushu University)
| DES1-1
13:30 |
Invited Arbitrary Position Dynamic Local Refreshing Technology on LCD *Dongchuan Chen1 1. BOE (China) |
| We propose an arbitrary position dynamic local refreshing display technology with a new GOA structure as well as new TCON and driver IPs to generate GOA and Data timing sequences that can initiate pixel line scans at any line and implement refreshing at different frequencies in different regions, breaking the limitation of line-by-line scanning of conventional GOA. The power consumption of GOA and Data drivers ... | |
| DES1-2
13:50 |
Partially Selective Shift Register for Low Power Variable Refresh Rate AMOLED Displays *Tae Woong Lee1, Min Kyu Chang1, Ji Hoon Kim1, Hyoungsik Nam1 1. Kyung Hee University (Korea) |
| The proposed shift register controls the output pulse generation only by a single output enable(OE) signal. This shift register can lower the power consumption by applying different refresh rates for separate regions according to videos characteristics. The proposed circuit can be implemented by only adding 6 TFTs, 1 capacitor and OE signal to a conventional shift register. | |
| DES1-3
14:10 |
A Solution for the Flicker of MRVR Panel *Yuqing Wang1, Ying Shen1, Mingwei Ge1, Xiaoping Tan1, Tao Tang1, Zhisong Sun1, Ningbo Wang1 1. Kunshan Govisionox Optoelectronics Co., Ltd (China) |
| This solution is based on MRVR(Multi-Region Variable Refresh) application scenario. When there is a sudden change in load in the high-refresh-rate area, the load situation of the two frames before and after the local refresh area is detected to determine whether to immediately refresh the low-refresh-rate area and IRC(IR-Drop Compensation) for the entire frame. Ultimately, it solves the problem of abnormal flicker. | |
| DES1-4
14:30 |
A Bidirectional Gate Driver Circuit with Positive Pulse for Low Frame Rate LTPO AMOLED Displays *De-Lin Shih1, Chia-Lun Lee1, Li-Wei Shih1, Po-Cheng Lai2, Chih-Lung Lin1 1. National Cheng Kung University (Taiwan), 2. AUO Corporation (Taiwan) |
| This work proposes a bidirectional gate driver circuit that can provide scan signals for AMOLED pixel circuits. The proposed circuit generates a stable output waveform with high driving capability and low leakage current by adopting the LTPO backplane. Hence, this circuit has great prospects for use in low-frame-rate displays. |
DES2: Driver Circuit for Micro-LED and OLED
Special Topic of Interest on Micro/Mini LEDs
Dec. 5 15:20-16:40 Small Hall
Chair: Reiji Hattori (Kyushu University)
Co-Chair: Hyun-Wook Lim (Samsung Electronics)
| DES2-1
15:20 |
LTPO MicroLED Pixel Circuit for Highly Stable Driving Current with 6T1C Pulse Width Contol Circuit Structure *Ji-Hwan Park1, Kyeong-Soo Kang1, Chanjin Park1, Soo-Yeon Lee1 1. Seoul National University (Korea) |
| We propose a new 6T1C PWM structure-based LTPO μLED pixel circuit for uniform diving current. The proposed circuit can reduce data voltage range with 6T1C PWM structure. By compensating for falling wave-shape fluctuations, the circuit exhibits low error rate. Moreover, applying the VSWEEP to the source node of the DRT_PWM ensures that the μLED current maintains a constant peak current level. | |
| DES2-2
15:40 |
Oxide TFT-Based Micro-LED Pixel Circuit Enhancing Low Gray Expression Through Continuous Piecewise Linear Sweep Signal *Jaybum Kim1, Kyeong-Soo Kang1, Ji-Hwan Park1, Chanjin Park1, Minji Kim1, Soo-Yeon Lee1 1. Seoul National University (Korea) |
| In this paper, we propose a compensation pixel circuit for micro-LED displays employing separate emission phases. In this method, a sweep signal is continuous piecewise linear and has two slopes: one for low gray levels and the other for mid-to-high gray levels. By adopting a higher slope sweep signal for low gray levels than high gray levels, the falling time is significantly reduced from 234 µs ... | |
| DES2-3
16:00 |
Oxide TFT-Based Scan Driver Circuit with Multiple Output Signals using Blocking Structure *Hwarim Im1, Eun Kyo Jung2, Shin-Hyeong Kim2, Kook Chul Moon2, Yong-Sang Kim2 1. Konkuk University (Korea), 2. Sungkyunkwan University (Korea) |
| We propose an oxide thin-film transistor-based scan driver circuit with multiple output signals. The proposed circuit uses a blocking structure to minimize the mutual interferences between multiple output signals. The proposed circuit stably generates multiple outputs with improved output characteristics under threshold voltage variations from −1.0 to 0.6 V. | |
| DES2-4L
16:20 |
Low Power a-IGZO TFT Shift Register Based on Two Low-Voltage Levels *Seoyeong Jeong1, Hyoungsik Nam1 1. Kyung Hee University (Korea) |
| This paper proposes a low-power shift register using a series-connected two transistor (STT) structure with two low-voltage levels and 33% duty ratio clocks to completely turn off the TFTs and secure stable operation. The circuit reduces power consumption, covers a wide VTH range, and improves stability, making it suitable for AMOLED displays. |
DES3/VHF5: Automotive Display Technologies and Driver Safety
Special Topic of Interest on Automotive Displays
Dec. 5 17:10-18:10 Small Hall
Chair: Haruhiko Okumura (Toshiba corp.)
Co-Chair: Makio Kurashige (Dai Nippon Printing)
| DES3/VHF5-1
17:10 |
Invited Safe Image Display Conditions of Head-Up Display *Akinari Hirao1, Takashi Hosokawa2, Takayuki Tsui3, Tomotaka Igarashi3 1. Shibaura Institute of Technology (Japan), 2. Japan Automobile Research Institute (Japan), 3. Japan Automobile Manufacturers Association (Japan) |
| HUDs are an effective means of safely presenting information to drivers because they require little eye movement. However, depending on the display method, it may have the opposite effect, such as unawareness of the hazard behind the display. In this study, experiments were conducted on image display methods in HUDs to determine safe display conditions. | |
| DES3/VHF5-2
17:30 |
Invited New International Safety Regulation for Automotive Head-Up Display *Akinari Hirao1,2 1. Shibaura Institute of Technology (Japan), 2. National Traffic Safety and Environment Laboratory (Japan) |
| Head-up displays are increasingly being adopted to present information because they enable drivers to receive information without eye movement. On the other hand, overlaying information on the forward field of vision may cause safety hazards. This year, a new UN regulation for HUD displays was approved. This presentation introduces the contents of the new regulations. | |
| DES3/VHF5-3
17:50 |
Effects of Symbol Size, Luminance Contrast and 3D Speckle on AR-HUD Symbol Recognition *Ting-Yu Liu1, Pei-Li Sun1 1. National Taiwan University of Science and Technology (Taiwan) |
| Through a series of psychovisual experiments, this study evaluates the effects of luminance contrast, speckle contrast, speckle size, and viewing distance on the recognizable size of symbols displayed in AR-HUD. The results showed that Michelson Contrast with power function inversely relates to the recognizable size. A regression model was derived using the experimental data to predict the threshold of recognizable size of the symbols. |
DES4: Display System Technologies for AR/VR
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 6 10:50-12:10 Room 108
Chair: Hitoshi Niigaki (NTT)
Co-Chair: Seishi Takamura (Hosei University)
| DES4-1
10:50 |
Invited Review and Perspective of XR Technologies *Hiroshi Mukawa1 1. Sony Semiconductor Solutions Corporation (Japan) |
| A number of technologies must be highly integrated to deliver immersive XR experiences to users. These technologies are not only for XR hardware but also for content creation and distribution. In this paper, the author introduces an XR workflow and reviews three key XR technologies Sony has been developing. The challenges and perspectives of XR technologies are also discussed. | |
| DES4-2
11:10 |
Invited Innovative Film Type Backplane for Transparent Display *Sohui Jeon1, Kenji Shibata1, Kota Araki1 1. Panasonic Industry Co., Ltd. (Japan) |
| We have developed the film-type transparent backplane using the transparent conductive film made of metal mesh with our unique manufacturing method. By forming fine and low resistance wirings on a flexible film and mounting LEDs with optimized material and process, transparent and highly visible LED displays can be realized. | |
| DES4-3
11:30 |
Colorimetric Characterization of Augmented Reality GlassesBased on the Birdbath Optical Structure *Ya-Chi Chao1, Li-Chen Ou1 1. National Taiwan University of Science and Technology (Taiwan) |
| A new colorimetric characterization model is presented in this study for optical see-through augmented reality (AR) glasses based on the birdbath structure. The model employs an s-curve characterization approach for AR content, incorporating the spectral transmittance of the AR lens and the additive color mixing. | |
| DES4-4L
11:50 |
Color Breakup Reduction in Field Sequential Color Liquid Crystal Displays Using Eye-Tracking for Over 3000 ppi Virtual Reality System *Keiji Tago1, Yoshihiro Watanabe1, Toshinori Uehara1, Akira Hasegawa1, Kazunari Tomizawa1 1. Japan Display Inc. (Japan) |
| We explored a field sequential color liquid crystal display virtual reality (LCD VR) system targeting a 3000-ppi. The problem of color breakup can be mitigated using eye-tracking devices and advanced image rendering processes. We performed subjective evaluations of image quality of the developed LCDs using our evaluation setup. Our findings suggest the potential of field sequential color LCD systems for high-ppi VR viewing. |
DESp1: Display Electronic Systems
Dec. 5 11:10-12:30 Main Hall
| DESp1-1 | Research on Influenced Factors in Different Pre-Processed Video Sources for DBI Lossless Compression Algorithm *Lin Cheng1, Hong Ching Lai1, Jing Xu1, Lian Jia Wu1, Jin Jang Nam1, Hui Jin Cheng1, Wei En Ni1 1. Suzhou ESWIN Computing Technology Co., Ltd. (China) |
| In this paper, a video source pre-processing system is proposed to remove the high-frequency on OLED display to guarantee the DBI compensation data can be lossless compressed to a fixed compression ratio. Balancing visual loss and compression ratio to choose the best removing high-frequency methods. | |
| DESp1-2 | Development of High Quality Large-Size Saccade-Based Line Display with 256-Grayscale *Keisuke Muto1, Tetsuya Gokan2, Makiko Okumura1 1. Kanagawa Institute of Technology (Japan), 2. Microchip Design Lab Ltd. (Japan) |
| A Large-size saccade-based line display with 256-grayscale has been developed. To achieve high quality performance, high speed TLC5940 LED driver IC was used, which is controlled by a PIC microcontroller using direct memory access and SPI communication to achieve high-speed image flash. | |
| DESp1-3L | Impact of Oxygen Plasma on the Performance of IGZO/PbS QDs/Ga2O3 Structures for Enhancing Photo Sensor Application *Yong Jun Jeong1, Jae Kyeong Jeong1 1. Hanyang University (Korea) |
| In this paper, we improved the performance of IGZO/PbS QD phototransistors by inducing partialoxidation in the PbS QDs via oxygen plasma during Ga2O3 layer deposition. The resulting IGZO/PbS QDs/Ga2O3 photo transistor demonstrated remarkable responsivity 196.69 A/W and detectivity 5.47 × 1012 Jones under 1550 nm illumination. | |
| DESp1-4L | Ghost Image Detection in Non-Uniform HUD Projection *Yu-Sing Wu1, Pei-Li Sun1 1. National Taiwan University of Science and Technology (Taiwan) |
| This research proposes an algorithm identifying and segmenting ghost images given a synthetic photograph of a chessboard pattern presumably projected by a head-up display with poor luminance uniformity and ghosting defects. The proposed algorithm performs well with images not severely non-uniform, but further optimization is needed for images with severe non-uniformity. |
Workshop on Flexible Electronics
| Dec. 4 | 13:00-14:20 | Room 204 | FLX1 | Flexible and Stretchable Sensors (1) |
| Dec. 4 | 14:50-16:10 | Room 204 | FLX2 | Flexible and Stretchable Sensors (2) |
| Dec. 4 | 16:40-18:00 | Room 204 | FLX3 | Flexible and Stretchable Sensors (3) |
| Dec. 5 | 9:00-10:20 | Room 108 | FLX4 | Advanced Processes and Materials for Flexible Devices (1) |
| Dec. 5 | 10:50-12:10 | Room 108 | FLX5 | Advanced Processes and Materials for Flexible Devices (2) |
| Dec. 6 | 9:00-10:20 | Small Hall | FLX6 | Flexible Organic Devices |
| Dec. 6 | 10:50-12:10 | Small Hall | FLX7 | Advanced Technologies for Flexible and Stretchable Displays |
| Dec. 6 | 13:50-15:10 | Main Hall | FLXp1 | Devices and Materials for Flexible Electronics |
| Dec. 6 | 13:50-15:10 | Main Hall | FLXp2/OLEDp5 | Devices and Materials for Flexible OLED |
FLX1: Flexible and Stretchable Sensors (1)
Dec. 4 13:00-14:20 Room 204
Chair: Mitsuru Nakata (NHK Science &Technology Research Laboratories)
Co-Chair: Keiichi Akamatsu (FUJIFILM Corporation)
| FLX1-1
13:00 |
Invited Sheet-Type Sensor System for Micro-Signal Acquisition and Remote Healthcare *Teppei Araki1 1. Osaka University (Japan) |
| A multimodal remote system with simultaneous physical sensing and optical inspection can help develop effective healthcare systems. Here, sheet-type sensors are fabricated using stretchable and transparent electronic devices that wirelessly detect multiple biosignals with low noise, stepping forward to realize monitoring technologies of natural responses in daily life. | |
| FLX1-2
13:20 |
Invited Stretchable Hybrid Electronics for Body-Attachable Wearable Electronics Applications *Yongtaek Hong1 1. Seoul National University (Korea) |
| Key enabling technology for stretchable hybrid electronics, including strain-engineered elastic platform and integration of rigid high-performance devices with printed soft components, will be discussed. Several prototypes based on the developed technology will be presented for LED display, mechanical sensors, UI/UX, and thermoelectric battery applications. | |
| FLX1-3
13:40 |
Invited High-Sensitive Active-Matrix Strain Sensor Based on Organic TFT *Shohei Koizumi1, Shusuke Kanazawa2,3, Motoshi Itagaki2,3, Changhoon Shim1, Kentaro Yamada1, Seiji Hashiba1, Makoto Nakazumi1, Yoshiaki Kito1 1. Nikon Corporation (Japan), 2. National Institute of Advanced Industrial Science and Technology (Japan), 3. Sensia Technology Co. Ltd (Japan) |
| We developed equipment such as a direct imaging exposure system for the roll-to-roll process and used roll to roll equipment to develop organic transistors. In this study, we developed a flexible strain sensor device that takes advantage of the flexibility of organic transistors. This sensor is a new device that can measure strain distribution with high sensitivity. | |
| FLX1-4L
14:00 |
Characterization of Multimodal Tactile Sentencing in Soft Robot Hand with Implant Structure *Tomohito Sekine1, Shoma Kamanoi1, Junya Yoshida1, Hiro Yagasaki1, Eri Kamiya1, Yi-Fei Wang1, Yasunori Takeda1 1. Yamagata University (Japan) |
| Multimodal tactile sensing ensures smooth object handling and accusation recognition in soft robot hands. A soft sensing mechanism is proposed for use as a structural type embedded in a soft robot hand. Soft pressure and temperature sensors are mounted on a single-chip substrate. This study reveals that when embedded in the robot hand, the silicone skin thickness affects the pressure and temperature sensing. |
FLX2: Flexible and Stretchable Sensors (2)
Dec. 4 14:50-16:10 Room 204
Chair: Tadahiro Furukawa (Yamagata University)
Co-Chair: Teppei Araki (The Institute of Scientific and Industrial Research, Osaka University)
| FLX2-1
14:50 |
Invited Non-Contact Biometric Measurement and Visualization *Shintaro Izumi1 1. Kobe University (Japan) |
| There is a significant interest in non-contact measurement technologies that offer the advantage of unobtrusive monitoring without the need for direct physical contact with the device. This paper introduces innovative methods for non-contact measurement and visualization of vital information utilizing advanced sensors, including ultrasound, microwaves, and strain sensors. | |
| FLX2-2
15:10 |
Invited Challenge for Odor Digitization using Inkjet-Printable Artificial Olfactory Sensor *Kazuki Nagashima1 1. Hokkaido University (Japan) |
| Collecting “chemical information” through a long-term stable molecular sensing provides a new approach to clarify complex phenomena, which cannot be understood only by physical information. Odor is one promising source of chemical information. In this paper, we demonstrate our recent research on inkjet-printable artificial olfactory sensors, with challenges regarding long-term stability and odor digitization. | |
| FLX2-3L
15:30 |
Flexible Organic Photodetectors Capable of Selectively Detecting Visible and Near-Infrared Light *Sachi Awakura1, Kosei Sasaki1, Ryota Fukuzawa1, Yusaku Tagawa1, Masahito Takakuwa1, Takao Someya1, Tomoyuki Yokota1 1. The University of Tokyo (Japan) |
| Multimodal biometrics have attracted attention in terms of improving its accuracy. However, imagers that can simultaneously capture fingerprint and finger vein images have not been realized. Here, we report flexible organic photodetectors with two active layers that can selectively detect visible and near-infrared light, which are used for fingerprint and finger vein multimodal authentication. | |
| FLX2-4L
15:50 |
Stabilization of Electrical Conductivity of Stretchable Wires Printed on Elastomer-based Substrate During Cyclic Tensions *Masahiro Inoue1, Rintaro Yamamoto1 1. Gunma University (Japan) |
| The electrical conductivity variation of stretchable wires printed with polyurethane-based electrically conductive pastes was examined during cyclic tensions. The present work found stabilizing electrical conductivity by the mechanical deformation during the tensions. Improving the electrical reliability of the wires through this phenomenon is discussed for established advanced micro-systems. |
FLX3: Flexible and Stretchable Sensors (3)
Dec. 4 16:40-18:00 Room 204
Chair: Takashi Nagase (Osaka Metropolitan Univerisity)
Co-Chair: Takeshi Sasaki (NIPPON STEEL Chemical & Material Co., Ltd)
| FLX3-1
16:40 |
Invited “Touching is Believing” – The Next Generation Capacitive Fingerprint Sensing Technology *Toru Sakai1, Eric Derckx1, Rob van Lier1, Peter Notermans1, Said Loudagh1 1. Touch Biometrix (Netherlands) |
| The next generation capacitive fingerprint sensing technology has been developed by using a novel active pixel architecture implemented in an indium gallium zinc oxide (IGZO) TFT array in combination with a proprietary Read Out Integrated Circuit (ROIC) technology. The sensing array of 1600 x 1500 pixels with 500 ppi resolution is successfully realized and it can deliver outstanding quality fingerprint image. | |
| FLX3-2
17:00 |
Invited Sheet-Type Terahertz and Infrared Imagers for Multi-View Visualization and Analysis *Yukio Kawano1,2,3 1. Chuo University (Japan), 2. National Institute of Informatics (Japan), 3. Kanagawa Institute of Industrial Science and Technology (Japan) |
| We have developed flexible terahertz (THz) and infrared (IR) imager sheets based on carbon nanotube films with broadband optical absorption properties. We report on multi-view THz and IR visualization, which have enabled omni-directional analysis for various forms of objects. As industrial applications of the imagers, we have demonstrated nondestructive detection of impurities concealed inside coating and non-sampling and label-free chemical monitoring. | |
| FLX3-3L
17:20 |
Microfabrication of Metal Electrode Formation on a Bioabsorbable Polymer by Laser Ablation *Hiroaki Takehara1,2, Kazuki Shimada1, Kota Naito1, Takanori Ichiki1,2 1. Univ. Tokyo (Japan), 2. Innovation Center of NanoMedicine (iCONM) (Japan) |
| Bioabsorbable polymers are highly attractive as safe and minimally invasive materials for constructing implantable and semi-implantable medical devices used in/on the human body. This study proposes microfabrication of metal electrode formation on the bioabsorbable polymer substrates including poly(L-lactic acid) (PLLA) for highly safe and minimally invasive biomedical devices. | |
| FLX3-4L
17:40 |
Strain Effects on Polycrystalline Germanium Thin Films for Strain Transistors *Kota Igura1, Koki Nozawa1, Takashi Suemasu1, Kaoru Toko1 1. University of Tsukuba (Japan) |
| We investigated the effects of strain on the crystal and electrical properties of p-type and n-type polycrystalline Ge layers. Strain affects carrier mobility, particularly electron mobility. This is due to changes in grain boundary barrier height. Notably, the strain-dependent behavior of the grain boundary barrier height is opposite for between n-type and p-type Ge layers. |
FLX4: Advanced Processes and Materials for Flexible Devices (1)
Dec. 5 9:00-10:20 Room 108
Chair: Hiroki Yasuga (AIST?National Institute of Advanced Industrial Science and Technology?)
Co-Chair: Manabu Ito (TOPPAN Holdings Inc.)
| FLX4-1
9:00 |
Invited Capillary Printing of Fine Structures on Flexible and Hybrid Substrates *Frederic Raynal1, Achille Guitton1, Marc Pascual1, Kristina Farmand1, Maroua Ben Haddada1, Nathan Bigan1, Sahar Al Kamand1, Amin M'barki1 1. Hummink (France) |
| In the flexible hybrid electronics (FHEs), efforts are underway to fabricate miniaturized and cost-effective sensors. While various printing technologies exist, each has its advantages and limitations. High Precision Capillary Printing (HPCaP) addresses these challenges. It utilizes capillary forces and resonance for ink deposition, achieving high resolutions at micron and sub-micron scale with exceptional precision. | |
| FLX4-2
9:20 |
Low-Temperature Fabrication Process for IGZO-TFTs in Future Roll-to-Roll Manufacturing *Tsukasa Kishiume1, Takao Kokubun1, Masakazu Hori1, Masayoshi Fuchi1, Yoshiaki Kito1, Makoto Nakazumi1 1. Nikon Corporation (Japan) |
| IGZO-TFT backplanes on an A3-size flexible plastic film were developed for flexible electronic devices. We have fabricated the backplanes at process temperatures of 150 °C and 230 °C using a roll-to-roll maskless exposure system. The devices exhibited a mobility of 7.5 cm2/Vs, combined with good reliability under bias stress. Finally, we demonstrated a flexible AMOLED display. | |
| FLX4-3L
9:40 |
Three-dimensional Shape Electronics using Polyaniline *Tadahiro Furukawa1, Toru Bando2, Nozomu Fujii2, Momoe Fukita2, Masaki Furukawa2 1. Yamagata University (Japan), 2. Idemitsu Kosan Co., Ltd. (Japan) |
| We have developed technologies for forming electrodes on three-dimensional objects using polyaniline ink. First, the polyaniline ink pattern was printed on a flat sheet, then thermoformed into a three-dimensional shape, and finally copper was plated onto the pattern. The polyaniline ink pattern could be stretched more without disconnection than the silver paste pattern. | |
| FLX4-4L
10:00 |
Record-High Mobility Polycrystalline GeSn P-Channel Thin-Film Transistors *Shintaro Maeda1, Kenta Moto2, Linyu Huang2, Atsuki Morimoto2, Keisuke Yamamoto2, Takashi Suemasu1, Kaoru Toko1 1. University of Tsukuba (Japan), 2. Kyushu University (Japan) |
| This study focuses on controlling nucleation during the crystallization process of amorphous Ge thin films by introducing multilayer structures. This structure effectively controlled nucleation and expanded crystal grain size. The introduction of this process led to superior polycrystalline Ge based thin film transistor performance compared to other methods, with high field effect mobility (250 cm2/Vs). |
FLX5: Advanced Processes and Materials for Flexible Devices (2)
Dec. 5 10:50-12:10 Room 108
Chair: Tadahiro Furukawa (Yamagata University)
Co-Chair: Kenichi Uemura (NIPPON STEEL Chemical & Material Co., Ltd.)
| FLX5-1
10:50 |
Invited Design of Nano and Chemical Structures of Nanocellulose-Based Devices for Green Flexible Electronics *Hirotaka Koga1 1. Osaka University (Japan) |
| Here, the nanostructure design of a wood-derived nanocellulose substrate for skin-conformable electrophysiological signal sensors is reported. Furthermore, the chemical structure design of nanocellulose for tuning its electrical properties is reported to develop sustainable semiconducting nanomaterials. Their properties and applications in sensing and energy generation are also presented. | |
| FLX5-2
11:10 |
Invited Research on Electrically Driven Capillary Phenomena Toward a Liquid Manipulation System on Wearable Devices *Hiroki Yasuga1, Ko Okumura2, Yusuke Takei1 1. National Institute of Advanced Industrial Science and Technology (Japan), 2. Ochanomizu University (Japan) |
| In the wearable systems for biofluids, microfluidics has been used for transport of the biofluids to the embedded sensors. In our work, we are developing a method of integrating digital microfluidics with capillary phenomena, with the high functionality, compactness, and 3D liquid manipulation for wearable systems. | |
| FLX5-3L
11:30 |
Development of New Tempered Ultra-Thin Glass (CX-07) with High Impact Resistance *Ryoya Hashimoto1, Naotoshi Inayama1, Yusuke Shimizu1 1. Nippon Electric Glass Co.,Ltd. (Japan) |
| Tempered ultra-thin glass is required to have the high strength of the pen-drop test, an impact resistance test, but the mechanism of this strength is still unclear. Here, we investigate the pen-drop test and describe the inferred mechanism. Furthermore, based on this mechanism, we report on the creation of CX-07, a tempered ultra-thin glass with high impact resistance. | |
| FLX5-4L
11:50 |
Facile Crack Control Method for Stretchable CNT-Au Composite Films *Masashi Miyakawa1, Hiroshi Tsuji1, Tatsuya Takei1, Toshihiro Yamamoto2, Yoshihide Fujisaki1, Misturu Nakata1 1. NHK Science & Technology Laboratories (Japan), 2. NHK Foundation (Japan) |
| In this study, we introduce a facile method for controlling cracks using one-step spray deposition for fabricating highly stretchable CNT-Au composite films. The composite films can be stretched up to 100% strain without disconnection of lines by formed conductive pathways. |
FLX6: Flexible Organic Devices
Dec. 6 9:00-10:20 Small Hall
Chair: Takashi Nagase (Osaka Metropolitan Univerisity)
Co-Chair: Manabu Ito (TOPPAN Holdings Inc.)
| FLX6-1
9:00 |
Invited How to Combine Printed Ferroelectric Sensors and Organic Transistors to an Active Matrix Sensory Sheet *Andreas Petritz1, Esther Karner-Petritz1, Takafumi Uemura2,3, Christine Prietl1, Philipp Schäffner1, Manfred Adler1, Andreas Tschepp1, Jonas Groten1, Martin Zirkl1, Marco Fattori4, Teppei Araki2,3, Herbert Gold1, Tsuyoshi Sekitani2,3, Barbara Stadlober1 1. JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria), 2. Institute of Scientific and Industrial Research Osaka University (Japan), 3. AIST Advanced Photo-Bio Lab, Photonics Center Osaka University (Japan), 4. Eindhoven University of Technology (Netherlands) |
| Addressing an active matrix in e-skins is best achieved with organic transistors, which are the ideal counterparts for flexible sensors due to their compatibility with flexible, ultra-thin or stretchable substrates. We present different combinations of ferroelectric sensors with organic transistors in e-skins for tactile pressure sensors, proximity sensing and vital parameter monitoring. | |
| FLX6-2
9:20 |
Invited Mass Production of OTFT Backplanes and Flexible ePaper Displays Using Existing FPD Lines *Paul Cain1 1. FlexEnable Technology Ltd. (UK) |
| We report on a recent breakthrough in achieving mass production and product shipments of the first OTFT backplanes manufactured in high volume using existing FPD lines. This is the first time OTFT backplanes have entered mass production and paves the way for a new generation of product form factors not possible with inorganic transistors. Here we describe the key elements of the process and properties ... | |
| FLX6-3L
9:40 |
Wavelength Tunable Characteristics in Organic Synaptic Transistors with Organic Floating-Gate Layers *Shusei Hattori1, Takashi Kobayashi1,2, Hiroyoshi Naito1,2,3, Takashi Nagase1,2 1. Osaka Metropolitan University (Japan), 2. The Research Institute for Molecular Electronic Devices (Japan), 3. Ritsumeikan Semiconductor Application Research Center (Japan) |
| We report wavelength-dependent characteristics in OFET memories using DNTT. Owing to photocarrier generation in floating gates, the memories exhibit Vth shifts under red LED light and emulate light-responsive synaptic characteristics. Under blue LED light, the memories exhibit nonvolatile memory characteristics and achieve good linearity of conductance change, enabling analog synaptic functions. | |
| FLX6-4L
10:00 |
Flexible Organic Photodiode Using Self-Doped Poly(3,4-Ethylenedioxythiophene) as a Transparent Electrode *Kosei Sasaki1, Kento Yamagishi1, Masahito Takakuwa1, Takao Someya1, Tomoyuki Yokota1 1. University of Tokyo (Japan) |
| Self-doped poly(3,4-ethylenedioxythiophene) (PEDOT) (S-PEDOT) is generating attention as a new conductive polymer to replace indium tin oxide (ITO) and PEDOT: polystyrene sulfonate. We report the fabrication of a flexible organic photodiode using S-PEDOT as a transparent electrode. The device exhibits photoelectrical properties comparable to those of conventional ITO electrodes while achieving higher flexibility and mechanical durability. |
FLX7: Advanced Technologies for Flexible and Stretchable Displays
Special Topic of Interest on Micro/Mini LEDs
Dec. 6 10:50-12:10 Small Hall
Chair: Mitsuru Nakata (NHK Science &Technology Research Laboratories)
Co-Chair: Teppei Araki (The Institute of Scientific and Industrial Research, Osaka University)
| FLX7-1
10:50 |
Invited Deformable Optoelectronic Devices Based on Ultrathin OLEDs *Seunghyup Yoo1, Donggyun Lee1, Su-Bon Kim1, Jee Hoon Sim1, Junho Kim1, Hyeonwook Chae1 1. Korea Advanced Institute of Science and Technology (Korea) |
| This talk first outlines the methods to realize ultrathin OLEDs and then discuss their potential applications. In particular, they are shown as an effective means to solve the key issues of stretchable OLEDs such as the limited fill factors inherent to stretchable devices adopting rigid island arrays and serpentine interconnectors. We will then show that ultrathin OLEDs can be used for OLED catheters for photobiomodulation ... | |
| FLX7-2
11:10 |
Invited Controlling Interfacial Structure for Blue Organic Light-Emitting Diode with Low Driving Voltage *Seiichiro Izawa1 1. Tokyo Institute of Technology (Japan) |
| We have reported a blue organic light-emitting diode (OLED) with extremely low driving voltage. The OLED's blue emission uses upconversion of excitons through an intermediate state at the donor/acceptor interface. We have discovered the properties of the D/A interface such as the energy levels and the molecular interactions are key in determining the device performance. | |
| FLX7-3
11:30 |
Distortion-Free Stretchable Display via Auxetic Structured Glass-Cloth Reinforced Elastomer Substrate With Negative Poisson's Ratio *Hyun Seok Kang1, Seung Mo Kang1, Byeong-Soo Bae1 1. Korea Advanced Institute of Science and Technology (Korea) |
| We introduce an unprecedented auxetic structured stretchable film capable of achieving a negative Poisson's ratio of −1. This is realized by embedding a rigid auxetic structured reinforcing glass-fabric inside surface-flattening soft elastomers. Using the developed auxetic film, we demonstrate an aspect ratio distortion-free stretchable micro-LED display capable of 25% stretching without performance degradation. | |
| FLX7-4L
11:50 |
Correction Method for Distorted Images on Stretchable Display *Toshihiro Yamamoto1, Masashi Miyakawa2, Tatsuya Takei2, Genichi Motomura2, Hiroshi Tsuji2, Yoshihide Fujisaki2, Mitsuru Nakata2 1. NHK Foundation (Japan), 2. NHK (Japan) |
| When a stretchable display is stretched, the displayed images are also deformed. We have devised a method to correct the displayed image when the display is stretched. For a stretchable display fabricated using liquid metal electrodes, we confirmed that displayed images could be corrected by estimating the stretching rate from the resistance of the liquid metal electrode when the display is stretched. |
FLXp1: Devices and Materials for Flexible Electronics
Dec. 6 13:50-15:10 Main Hall
| FLXp1-1 | Development of Water Vapor Barrier Film using Roll-to-Roll Process *Takao Kokubun1 1. Nikon Corporation (Japan) |
| In this study, we developed a water vapor barrier film aimed at roll-to-roll processing. A barrier film with controlled internal stress was produced using a silicon compound by plasma CVD and a coating of COP (Cycloolefin polymer) layer. WVTR(water vapor transmission rate )=1.5e-4 g/m2/day was achieved. A water vapor barrier film with anti-reflective properties and a reflectance ... | |
| FLXp1-2 | Multifunctional Textile Display: System Integration and Interconnection Hyung Woo Choi1,2, *Dong-Wook Shin2,3 1. University of Ottawa (Canada), 2. University of Cambridge (UK), 3. Hanbat National University (Korea) |
| Smart textiles integrated with multifunctional fibre components enable free-form factor, unrestricted design and unlimited scale beyond flexible electronics. We present the development of multifunctional textile displays by integrating versatile fibre components. We demonstrate the ability of these textiles to serve as dynamic display systems over large scale for revolutionary applications on smart homes and IoT | |
| FLXp1-3 | High UV Sensitivity Polythiophene/Composite Phototransistors Kaushlendra Agrahari1, Ming Han Chi1, S. Lakshmi Priya1, Chi Ming Liu1, Khurram Shazad1, Horng-Long Cheng2, *Yu-Wu Wang1 1. National ChangHua University of Education (Taiwan), 2. National Cheng Kung University (Taiwan) |
| A poly 3-hexylthiophene (P3HT) blended with polymer insulator polystyrene (PS)/nano composite materials phototransistor is reported. The blended sample, illuminated with a UV intensity of 550 μW/cm2, exhibited the highest sensitivity of 194.5. The key finding of this study is the ultra-low power consumption UV sensing. | |
| FLXp1-4 | Ultra-Flexible Carbon Nanotube Thin Film Transistors *Lin Xu1, Wei Huang1, Delang Lin1, Rongsheng Chen2, Man Chun Tseng2, Fion Sze Yan Yeung2, Hoi Sing Kwok2 1. South China University of Technology (China), 2. The Hong Kong University of Science and Technology (Hong Kong) |
| Carbon nanotube thin-film transistors (CNT-TFTs) are considered promising candidates for flexible displays and carbon-based chips. However, the large-scale fabrication of ultra-flexible CNT-TFTs remains challenging. In this study, we present a method for fabricating high-performance flexible CNT-TFTs using a dip-coating technique. These transistors maintain excellent performance even at a curvature radius of 2.5 mm. | |
| FLXp1-5 | Optimum Lamination Angle Between λ/4 Retardation Film and Polarizer in Circular Polarizer *Tsuyoshi Fujiwara1, Junichi Oizumi1, Terutsune Osawa1 1. Mitsubishi Chemical Corporation (Japan) |
| Circular polarizers consisting of a λ/4 retardation film and a polarizer are used in OLED displays to prevent glare (reflection). In the ideal case where the transmittance of the absorption axis of the polarizer is zero, the polarizer should be laminated at an angle of π/4. However, we have derived the lamination angle that minimizes the reflected transmittance when the transmittance of the absorption axis is not ... | |
| FLXp1-6L | Near-Infrared Fundus Imaging System with Using an Electric Contact Lens for Fundus Illumination *YANG CUI1, Koichi Shimizu1, Takeo Miyake1 1. Waseda University (Japan) |
| For home eye health monitoring, a portable and easy-to-operate fundus imaging system is necessary. We proposed a non-mydiratic near-infrared (NIR) fundus imaging system, which illuminates the retinal structure with an electronic contact lens equipped with an NIR LED. In addition, we also reconstruct images using a depth-dependent point spread function (PSF) to improve the captured image quality. | |
| FLXp1-7L | Reconstruction of Standard 12-Lead Electrocardiograms Using Flexible Electrode Sheets and Variational Autoencoder *Kazuya Takahashi1, Shintaro Izumi1,2, Yusaku Goto, Ryotaro Ohara1, Teppei Araki2, Sho Murase2, Hiroshi Kawaguchi1 1. Kobe University (Japan), 2. Osaka University (Japan) |
| We propose a method to estimate 12-lead ECG waveforms using data from a wireless circuit and a high-density multielectrode sheet sensor. Machine learning enhances waveform accuracy by integrating data from a 15-channel wearable sensor, addressing challenges such as motion artifacts and limitations in conventional wearable ECG devices. | |
| FLXp1-8L | Compact Connection Interface for Stretchable Electrodes to Achieve in Low Artifact Measurement *Kazumasa Sasahara1, Yoshiyuki Kaiho1, Mikishige Sugasa1, Takaaki Abe2, Tsuyoshi Sekitani2, Yoshifumi Yoshida1, Teppei Araki2 1. Seiko Future Creation Inc. (Japan), 2. Osaka University (Japan) |
| A connection system between stretchable electrodes and rigid measurement devices determines the signal quality, usability, and robustness of wearable devices. In this study, a compact connection interface system with minimal components and easy re-connection accessibility is developed, providing stability against motion artifacts and accelerations during surface electromyography measurements. | |
| FLXp1-9L | The Effects of Surfactant and Annealing on the Electrical Properties of Reduced Graphene Oxide Films *Chehung Wei1, Tzu-Yang Huang1 1. Tatung University (Taiwan) |
| We studied reduced graphene oxide (rGO) films using sodium dodecyl benzene sulfonate (SDBS) and sodium dodecyl sulfate (SDS). The critical micelle concentration and ultrasonication time significantly influenced film performance, while annealing improved electrical properties by reducing sheet resistance through the removal of surfactants during the process. | |
| FLXp1-10L | Press-Sensitive Adhesives With Low Dielectric Loss for Flexible Multi-Layered Electronic Components *Min-Seok Jeon1, Jin-Sun Cha1, Jeong-Ryul Kim2, Duck-Hee Kim3, Yeon-Ho Jeong3 1. Korea Testing Laboratory (Korea), 2. ICH Co. Ltd. (Korea), 3. APC Co. Ltd. (Korea) |
| Flexible multi-layered electronic components with very compact size/volume are needed to deal with the increasing demand for foldable and thin devices like foldable displays or flexible antennas. | |
| FLXp1-11L | Cu Nano-Imprinting With a Polymer Electrolyte Membrane Stamp at Room Temperature for Flexible Device Fabrication *Atsuki Tsuji1, Junji Murata1 1. Ritsumeikan University (Japan) |
| Patterned copper (Cu) is used in applications such as metal interconnects. Traditional nanopatterning methods involve complex processes and harsh chemicals. This study introduces a Cu nanopatterning method based on solid-state anodic dissolution at the PEM/Cu interface, which enables direct patterning without resists or harsh chemicals, thereby reducing environmental impact. | |
| FLXp1-12L | Urethane-Acrylate Based Stretchable Alternating Current Electroluminescence Device With Blue Light *Junsang Choi1, Jung Bin Shin1, Jong-Woong Kim1 1. Sungkyunkwan University (SKKU) (Korea) |
| This study developed a flexible AC electroluminescent (AC-EL) device using a polyurethane-acrylate (PUA) matrix embedded with ZnS phosphors and BaTiO3 to improve dielectric properties. Silver nanowire (AgNW) electrodes provided flexibility and stability. The device achieved 212 nits at 500 V and 1.0 kHz, with an operating voltage of 28 V at 5 kHz. | |
| FLXp1-13L | Process Control of Vacuum Forming to Suppress Electrical Conductivity Variation in 3D-Shaped Wires for In-Mold Electronics Applications *Rina Aida1, Masahiro Inoue1 1. Gunma University (Japan) |
| Dynamic percolation for electrical conductivity development in a stretchable wire printed on a thermoplastic substrate can be induced utilizing tensile deformation during a vacuum-forming process to achieve a three-dimensional (3D) wire shape. This phenomenon successfully suppresses the electrical conductivity variation in the wires, ensuring the formation of reliable 3D electric circuits. |
FLXp2/OLEDp5: Devices and Materials for Flexible OLED
Dec. 6 13:50-15:10 Main Hall
| FLXp2/OLEDp5-1 | Study on Mechanical Properties of AMOLED Stretchable-Display *Jinyan Huang1, Min Zhang2, Huanhuan Zhang2, Zhimin Yan2, Wangfeng Xi3, Rubo Xing3 1. Hefei Visionox Technology Co., LTD. (China), 2. Yungu (Gu'an) Technology Co., LTD. (China), 3. Kunshan Govisionox Optolelectronics Co., LTD. (China) |
| This paper mainly discusses the stripping problems encountered in the module production process of the stretchable display module, and optimizing the stress state of the wire during the stretching of the display module by improving the module laminated structure and module material. The process route of the stretchable display is opened up, and the stretchable display has good reliability with the opening process route. | |
| FLXp2/OLEDp5-2L | Core Technologies for Stretchable AMOLED with High Resolution & Stretchability *MunPyo Hong1, Jaewan Park1, Donghoon Kim1, Sooseong Lee1, Youngku Jin1, Gerhard Domann2, Daniela Collin2 1. Korea University (Korea), 2. Fraunhofer-Institute for Silicate Research (Germany) |
| This study presents core technologies to simultaneously improve stretchability and resolution. Firstly, we utilized photocurable hybrid capping material and stoichiometric Si3N4 thin film for advanced pixelized encapsulation. Secondly, for elastic metal electrode, we achieved fine patterning of a three-layer, composed of superelastic metal NiTi and low-resistance Al thin film, through dry etching at a substrate temperature below 50°C. | |
| FLXp2/OLEDp5-3L | Low-Voltage Upconversion Inverted Organic Light-Emitting Diodes Using Soluble Fullerene Derivatives *Kazuki Kojima1, Moeto Okuda1, Takashi Kobayashi1, Hiroyoshi Naito2, Takashi Nagase1 1. Osaka Metropolitan University (Japan), 2. Ritsumeikan University (Japan) |
| In recent years, organic light-emitting diodes (OLEDs) using the upconversion (UC) process mediated by triplet-triplet annihilation (TTA) have attracted increasing interest. In this study, we fabricated inverted OLEDs using soluble fullerene derivatives with different alkyl chain structures for acceptor layers and found that the alkyl chains at the interface facilitate efficient TTA-UC emission. |
Workshop on Touch Panels and Input Technologies
| Dec. 5 | 13:30-14:50 | Room 107 | INP1 | Automotive Cockpit HMI |
| Dec. 5 | 15:20-16:20 | Room 107 | INP2 | Haptics and AR/VR Interaction (1) |
| Dec. 6 | 9:00-10:20 | Room 206 | INP3/VHF6 | Haptics and AR/VR Interaction (2) |
INP1: Automotive Cockpit HMI
Special Topic of Interest on Automotive Displays
Dec. 5 13:30-14:50 Room 107
Chair: Nobuyuki Hashimoto (Japan Women's Univ.)
Co-Chair: Yasuhiro Sugita (Sharp Corporation)
| INP1-1
13:30 |
Invited HMI Cockpit: The Day Vehicles Understand People *Tsuguo Nobe1 1. Nagoya University (Japan) |
| The future of automated driving promises a revolution in society, offering convenience, safety, and sustainability through Software Defined Vehicles (SDVs). Advanced semiconductors and software will replicate human cognitive functions in vehicles. Human-Machine Interface (HMI) will play a vital role in communicating vehicle AI decisions to drivers and passengers, shaping the future of automotive development. | |
| INP1-2
14:10 |
Invited In-Cabin Human Machine Interface Consideration for Future *Toshiyuki Hoshi1, Hiroshi Wakuda1, Ayumu Kobayashi1 1. Alps Alpine Co., Ltd. (Japan) |
| Recently, lots of switch functions were integrated into the CID and there is new trend to back to physical switch due to usability concern with immediate operations. One the other hand, we believe technology to balance newer design and usability is demanded instead of past physical switch. For this purpose, we developed Local Vibration Feedback Technology, and this is a summary of it. | |
| INP1-3L
14:30 |
Invited Security Integrated Touchscreen Controllers for Payment Applications *John Shanley Shanley1 1. Microchip Technology, Inc. (United States of America) |
| Despite the benefits, touchscreens add additional security vulnerabilities to any payment terminal.This article describes how the secure maXTouch touch controller can be used to solve challenges in any payment applications. |
INP2: Haptics and AR/VR Interaction (1)
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 5 15:20-16:20 Room 107
Chair: Makoto Sato (Tokyo Tech)
Co-Chair: Kazunori Imoto (Toshiba)
| INP2-1
15:20 |
Invited Fingertip Tactile Sensation Using Piezoelectric Micromachined Ultrasonic Transducers and Flexible Polymer Actuator *Junji Sone1 1. Tokyo Polytechnic University (Japan) |
| To realize realistic metaverse communication, high-precision tactile feedback is required. Therefore, ultrasonic MEMS actuators were selected to transmit the vibration. Finger mounting pad is used and the ultrasonic waves can be amplified by the horn. Aeroacoustics effects are also used to complement the power of the ultrasonic wave. In addition, an electret-type flexible polymer actuator was developed. This device can also be used as a ... | |
| INP2-2L
15:40 |
Invited Interactive Aerial 3D Display Using Holographic Projector *Naoki Takada1, Yuzuki Nakatani1, Junai Uchida1, Naoya Hanaoka1, Harutaka Shiomi1 1. Kochi University (Japan) |
| We report on an aerial holographic 3D display. 4K-resolution holographic projector projects a focused 3D image on a resin 3D screen. The transmitted diffuse light generates an aerial 3D real image by retroreflectors. Finally, we realized a real-time aerial display of the 3D video comprising up to 21,972 points. | |
| INP2-3L
16:00 |
Invited Reproducing Realistic Haptic Feedback Using a Sensory Equivalent Vibration Conversion for a Commercial VR Controller *Daito Igarashi1, Masashi Konyo1, Satoshi Tadokoro1 1. Tohoku University (Japan) |
| The demand for realistic haptic experiences in VR has increased. Intensity Segment Modulation (ISM) converts high-frequency signals into waves that transducers can present while retaining sensory content. In this study, ISM was applied to a VR device, providing immersive vibration corresponding to audio. We evaluated ISM-converted vibration effectiveness on VR equipment compared to other devices. |
INP3/VHF6: Haptics and AR/VR Interaction (2)
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 6 9:00-10:20 Room 206
Chair: Yuichi Sasaki (Mitsubishi Elec.)
Co-Chair: Masamitsu Harasawa (NHK)
| INP3/VHF6-1
9:00 |
Invited Intensifying Somatosensory Communication *Yuichi Nakamura1 1. Kyoto University (Japan) |
| The somatosenses often lack temporal and spatial precision, which causes difficulties in actual applications such as communicating an exact location. We believe such disadvantages could be overcome with smart design, e.g., a symmetrical design for intuitively transmitting motion intention, and motion or action prediction, to provide stimulation at proper time. This article presents our experimental findings. | |
| INP3/VHF6-2
9:20 |
Invited A Novel Olfactory Display System for Presentation of Orthonasal and Pseudo-Retronasal Odors during Breathing *Yuji Wada1 1. Ritsumeikan University (Japan) |
| My team and I have developed a novel olfactory delivery system capable of presenting odor stimuli during both inhalation and exhalation. By placing an odor stimulus tube within the nasal cavity and sealing the gap between the tube and the nostril, participants can detect odors during both breathing phases. This system enables the investigation of how breathing patterns and odor timing impact odor-taste interactions. | |
| INP3/VHF6-3
9:40 |
Evaluation of Viewers' Physiological State by ECG Data while Viewing Art in an Immersive Space *Go Kazawa1, Ryohei Nakatsu1, Naoko Tosa1, Yasuyuki Uraoka2, Akane Kitagawa2, Koichi Murata2, Tatsuya Munaka2, Yoshiyuki Ueda1, Masafumi Furuta2, Michio Nomura1 1. Kyoto University (Japan), 2. Shimadzu Corporation (Japan) |
| We hypothesize that art appreciation positively affects viewers' motivation and creativity. First, an immersive environment was constructed. Then, we measured and analyzed physiological data obtained while subjects were viewing art and other content in the environment. In this paper, we report on the results of analyzing ECG data when art content is compared with geometric figure content and no content using the environment. | |
| INP3/VHF6-4
10:00 |
Invited Exploring 4D Space with Visual and Tactile Interface Haruo Igarashi1, *Hideyuki Sawada1 1. Waseda University (Japan) |
| A novel 4D interaction system with visual and tactile presentations is proposed. We focus on the role of the tactile sensation in the perception, and introduce a tactile display to present tactile sensation when a user touches the 3D hypersurface of a 4D object located in 4D space. |
Topical Session on DX Sensing and Radiation Imaging
| Dec. 6 | 9:00-10:20 | Room 107 | DXR1 | Phosphor Materials for Radiation Imaging |
| Dec. 6 | 10:50-12:10 | Room 107 | DXR2 | Radiation Imaging Systems (1) |
| Dec. 6 | 13:30-14:30 | Room 107 | DXR3 | Radiation Imaging Systems (2) |
| Dec. 5 | 15:40-17:00 | Main Hall | DXRp1 | Materials and Technique for Radiation Imaging |
DXR1: Phosphor Materials for Radiation Imaging
Dec. 6 9:00-10:20 Room 107
Chair: Masanori Koshimizu (Shizuoka University)
Co-Chair: Toru Aoki (Shizuoka University)
| DXR1-1
9:00 |
Invited Development of Glass Materials for Near-Infrared Emitting Scintillators *Naoki Kawano1, Kenji Shinozaki2, Keiichiro Miyazaki3, Akihiro Nishikawa3, Kensei Ichiba3, Kai Okazaki3, Takumi Kato3, Daisuke Nakauchi3, Fumito Kagaya1, Yuma Takebuchi4, Hiroyuki Fukushima5, Takayuki Yanagida3 1. Akita University (Japan), 2. National Institute of Advanced Industrial Science and Technology (Japan), 3. Nara Institute of Science and Technology (Japan), 4. Utsunomiya University (Japan), 5. National Institute of Technology, Fukui College (Japan) |
| We fabricated Er2O3-doped gallate glasses and tellurite glasses for near-infrared emitting scintillators. Both the glasses showed efficient scintillation in a near-infrared wavelength range due to the electronic transition between 4f levels in Er3+ ions. The lowest detectable dose rate limit was 5 mGy/h for the Er2O3-doped gallate glasses and 0.5 mGy/h ... | |
| DXR1-2
9:20 |
Invited Correlation Between Elastic Modulus of Oxide Glasses and Defect Formation by X-ray Irradiation *Hirokazu Masai1, Takayuki Yanagida2 1. National Institute of Advanced Industrial Science and Technology (Japan), 2. Nara Institute of Science and Technology (Japan) |
| Defect formation by irradiation in glass is often observed compared with that in crystal. Although interactions of glass and radiation are complicated, bond strength of the M-O bond is one of the parameters for estimating radiation damage. We have reviewed our recent work on X-ray induced defect formation of oxide glasses. | |
| DXR1-3
9:40 |
Invited Evaluation of Ionizing Radiation Induced Luminescence Properties of Rare Earth Doped Sesquioxide Single Crystals Grown by the Floating Zone Method *Takayuki Yanagida1, Daisuke Nakauchi1, Kai Okazaki1, Kenichi Watanabe2, Takumi Kato1, Noriaki Kawaguchi1 1. Nara Institute of Science and Technology (Japan), 2. Kyushu University (Japan) |
| Phosphors for ionizing radiation detection have played an important role for radiation imaging in many application fields such as medical and security purpose. The present work focuses on rare earth doped sesquioxide single crystals for scintillator detectors. Among the prepared samples, especially, Tb- and Eu-doped sesquioxide showed excellent scintillation characteristics. | |
| DXR1-4
10:00 |
Invited Development of Sulfide Translucent Ceramics for Radiation Imaging Detectors *Hiromi Kimura1, Takeshi Fujiwara1, Hidetoshi Kato1, Takumi Kato2, Toshiaki Kunikata2, Noriaki Kawaguchi2, Takayuki Yanagida2 1. National Institute of Advanced Industrial Science and Technology (Japan), 2. Nara Institute of Science and Technology (Japan) |
| We have developed the Eu-doped sulfide translucent ceramics such as CaS by the spark plasma sintering method, and the potential for radiation imaging applications was evaluated.Under X-ray irradiation, the prepared Eu-doped CaS translucent ceramics showed a broad emission around 650 nm, which was suitable for the wavelength sensitivity of Si-photodiode. |
DXR2: Radiation Imaging Systems (1)
Dec. 6 10:50-12:10 Room 107
Chair: Masanori Koshimizu (Shizuoka University)
Co-Chair: Toru Aoki (Shizuoka University)
| DXR2-1
10:50 |
Invited Thallium Bromide Sensors for Gamma-Ray Spectroscopy *Keitaro Hitomi1, Mitsuhiro Nogami1 1. Tohoku University (Japan) |
| Thallium bromide (TlBr) is a promising compound semiconductor for the construction of radiation sensors. Due to its high atomic numbers (81 and 35) and high density (7.56 g/cm3), TlBr exhibits high photon stopping power. TlBr crystals were grown by the traveling molten zone method using zone-purified materials. TlBr sensors were fabricated from the crystals. A gamma-ray spectrum of uranite was obtained with the TlBr detector ... | |
| DXR2-2
11:10 |
Invited Flexible X-ray Imaging Detectors for Advanced Applications *Takeshi Fujiwara1, Hidetoshi Kato1, Hiromi Kimura1, Ryoichi Suzuki1 1. National Institute of Advanced Industrial Science and Technology (Japan) |
| The development of a flexible digital X-ray detector offers a transformative approach to X-ray imaging by providing adaptability to various shapes and surfaces. This detector is lightweight, with the thinnest part measuring only 10 mm, making it suitable for a wide range of applications. Unlike traditional detectors made with fragile glass materials, this device utilizes a polyimide film substrate, enhancing its durability and ease of handling. | |
| DXR2-3
11:30 |
Invited Material Identification Imaging for Underground Burying Objects Using X-ray Spectral Information *Toru Aoki1,2, Takehiro Ikeda1, Kento Tabata1, Junichi Nishizawa1, Hiroki Kase1, Katsuyuki Takagi1,2 1. Shizuoka University (Japan), 2. ANSeeN Inc. (Japan) |
| ay scattering imaging for the purpose of imaging multiple hypothetical underground buried objects by specifying their materials. By converting multiple information such as intensity and X-ray photon energy into one-dimensional information, it was possible to identify the substance.. | |
| DXR2-4L
11:50 |
Invited Radiophotoluminescence for Radiation Imaging *Go Okada1 1. Kanazawa Institute of Technology (Japan) |
| Radiophotoluminescence (RPL) is a phenomenon where a fluorescence centre is formed via interaction with ionizing radiation. Despite the usefulness of RPL in the field of radiation measurement and imaging, materials recognized to show RPL are extremely limited. Against this background, a search for new RPL materials was intensively performed to deepen the understanding. In addition, new potential applications of RPL in radiation imaging were demonstrated. |
DXR3: Radiation Imaging Systems (2)
Dec. 6 13:30-14:30 Room 107
Chair: Masanori Koshimizu (Shizuoka University)
Co-Chair: Toru Aoki (Shizuoka University)
| DXR3-1
13:30 |
Invited Optimizing Interventional Radiology with DX Sensing: a Clinical Perspective *Ayaka Harigai1, Shinnosuke Yamamoto1, Hiroki Kase2, Hiroshi Ishihata1, Kenji Kikuchi1, Kei Takase1, Toru Aoki2 1. Tohoku University (Japan), 2. Shizuoka University (Japan) |
| Integrating DX sensing in interventional radiology improves out-of-plane needle puncture accuracy. This study identifies challenges in non-intuitive preoperative planning and intraoperative anatomical visualization. We propose solutions using three-dimensional computed tomography imaging and needle sensors, demonstrating effectiveness in phantom experiments. | |
| DXR3-2
13:50 |
Invited X-ray Talbot-Lau Interferometer and Its Application for Nondestructive Material Inspection *Tatsuya Yatagawa1, Tomoki Mori2, Siqi Wang2, Yutaka Ohtake2, Hiromasa Suzuki2, Kazuhiro Kido3, Yasunori Tsuboi3 1. Hitotsubashi University (Japan), 2. The University of Tokyo (Japan), 3. Konica Minolta, Inc. (Japan) |
| This presentation briefly introduces the Talbot-Lau interferometer and its applications in nondestructive material inspection. | |
| DXR3-3
14:10 |
Invited Non-Contact Operation 3D-DICOM Viewerwith Spatial Reality Display *Hiroki Kase1, Junichi Nishizawa1,2, Katsuyuki Takagi1, Katsumasa Nakamura2, Toru Aoki1 1. Shizuoka University (Japan), 2. Hamamatsu University School of Medicine (Japan) |
| In the medical field, information acquired by 3D X-ray CT is three-dimensional volume data, whereas the most common method of confirming internal structures is to observe them as two-dimensional images from three directions. This study proposed a system that can be operated with non-contact under surgical conditions using a spatial reality display and motion capture to confirm the body's internal structures in three dimensions |
DXRp1: Materials and Technique for Radiation Imaging
Dec. 5 15:40-17:00 Main Hall
| DXRp1-1 | Development of UV-Cured Plastic Scintillators With 9-Vinylcarbazole Having High Scintillation Light Yields *Naru Hayashi1, Masanori Koshimizu1 1. Shizuoka University (Japan) |
| We have developed UV-cured plastic scintillators having high scintillation light yields. We prepared the samples with 9-vinylcarbazole at different concentrations. The samples with high 9-vinylcarbazole concentration had the high scintillation light yields among the prepared samples. The scintillation light yields of the samples containing 9-vinylcarbazole at 30 and 60 wt% were 9600 ph/MeV. These yields were 92 % of the yield of EJ-204. | |
| DXRp1-2 | Development of Trimethoxyphenylsilane Modified LiGaO2 Nanoparticle-Loaded Plastic Scintillators for Neutron Detection *Haruhisa Tsukahara1, Masanori Koshimizu1 1. Shizuoka University (Japan) |
| Plastic scintillators with fast scintillation decay and scalability have attracted attention for neutron detection. Trimethoxyphenylsilane-modified LiGaO2 nanoparticles were loaded to plastic scintillators to add neutron detection. The dispersion of the nanoparticles was successfully improved by surface modification of nanoparticles. | |
| DXRp1-3 | Development of Tissue-Equivalent Thermoluminescence Dosimeters Based on BCNO *Masanori Koshimizu1, Haruto Taki1, Kohei Oba1, Yutaka Fujimoto2, Keisuke Asai2 1. Shizuoka University (Japan), 2. Tohoku University (Japan) |
| As a tissue-equivalent dosimeter, thermoluminescence (TL) materials based on BCNO have been developed. The photoluminescence quantum yield and the TL intensity had an anticorrelation for undoped BCNO. In addition, Mn doping significantly enhanced the TL intensity possibly owing to introduction of trapping sites of electrons and holes by the doping. | |
| DXRp1-4 | X-ray and Neutron-Induced Thermoluminescence Properties of Mg- and Pr-Codoped LiTaO3 Ceramics *Yuta Hiramatsu1, Genichiro Wakabayashi2, Masanori Koshimizu1 1. Shizuoka University (Japan), 2. Kindai University (Japan) |
| Mg2+ and Pr3+-codoped LiTaO3 was obtained as thermoluminescence materials that can detect X-rays and neutrons. After X-ray irradiation, the integrated TL intensity was much higher than that of a commercially available thermoluminescent dosimeter, and fading was considerably low. | |
| DXRp1-5 | Photoluminescence and Radioluminescence properties of CsPbBr3 quantum dots-embedded SiO2 glasses *Takumi Kato1, Daiki Shiratori2, Akito Watanabe3, Yutaka Fujimoto3, Keisuke Asai3, Akihiro Nishikawa1, Kai Okazaki1, Daisuke Nakauchi1, Noriaki Kawaguchi1, Takayuki Yanagida1 1. Nara Institute of Science and Technology (Japan), 2. Tokyo University of Science (Japan), 3. Tohoku University (Japan) |
| CsPbBr3 quantum dots-embedded SiO2 glasses were synthesized by the spark plasma sintering method. Their photoluminescence and radioluminescence properties were investigated to examine the scintillation performance. The XRD patterns observed a halo peak and diffraction peaks. An emission peak due to CsPbBr3 quantum dots was detected at around 515 nm. | |
| DXRp1-6 | Radiation-Induced Luminescence Properties of Tm-Doped Ca3TaGa3Si2O14 Single Crystals *Ryosei Takahashi1, Kai Okazaki1, Daisuke Nakauchi1, Takumi Kato1, Noriaki Kawaguchi1, Takayuki Yanagida1 1. Nara Institute of Science and Technology (Japan) |
| Undoped and Tm-doped Ca3TaGa3Si2O14 single crystals were synthesized by the floating zone method. All the prepared samples exhibited broad emission bands at 300–600 nm under X-ray irradiation. In addition, sharp emission peaks were observed at 350, 450, and 480 nm. Scintillation decay curves were fitted by a sum of three exponential functions. Two slow components were respectively derived ... | |
| DXRp1-7 | Luminescence and Scintillation Properties of Red-Emitting Eu-Doped TAGG Nanoparticle Scintillators With Different Compositions *Yuma Takahashi1, Masanori Koshimizu1 1. Shizuoka University (Japan) |
| We developed red-emitting Eu-doped TAGG (Tb3AlxGa5-xO12) nanoparticle scintillators with different compositions. The nanoparticles were synthesized via the sol-gel method. Upon X-ray irradiation, all the samples exhibited red emission. The highest photoluminescence quantum yield was over 70% for x=0. | |
| DXRp1-8 | Radiation Response Characteristics of Organic-Inorganic Lead Iodide Perovskite-Type Compounds with Various Organic Amines *Kai Okazaki1, Daisuke Nakauchi1, Naoki Kawano2, Takumi Kato1, Noriaki Kawaguchi1, Takayuki Yanagida1 1. Nara Institute of Science and Technology (Japan), 2. Akita University (Japan) |
| Organic-inorganic lead iodide layered perovskite-type single crystals with various organic amines (benzylamine, phenylethylamine, and 4-phenylbutylamine) were synthesized by the slow-cooling method. They showed transparency with orange colors and exhibited sharp scintillation peaks at 500-700 nm. The light yields of prepared samples were calculated to be 300-2100 photons/5.5 MeV-α). | |
| DXRp1-9 | Photoluminescence and Scintillation Properties of Nd3+-doped BaO-Bi2O3-P2O5 Glasses *Keita Miyajima1, Akihiro Nishikawa1, Takumi Kato1, Daisuke Nakauchi1, Noriaki Kawaguchi1, Takayuki Yanagida1 1. Nara Institute of Science and Technology (Japan) |
| We synthesized Nd-doped BaO-Bi2O3-P2O5 glasses and investigated their photoluminescence and scintillation properties. The samples showed near-infrared luminescence derived from 4f-4f transitions of Nd3+. We examined the dose rate response functions of the samples to evaluate the applicability to radiation measurements. The lower detection limit of radiation dose rate with our setup ... | |
| DXRp1-10 | Scintillation Properties of Nd-Doped BaCl2 Transparent Ceramic Emitting Near-Infrared Photons *Shota Otake1, Shunta Takase1, Takumi Kato1, Daisuke Nakauchi1, Noriaki Kawaguchi1, Takayuki Yanagida1 1. Nara Institute of Science and Technology (Japan) |
| Nd:BaCl2 transparent ceramic was fabricated by the spark plasma sintering method and scintillation properties were investigated. The sample had a high transmittance of approximately 80% in the near-infrared region. The scintillation peaks due to the 4f-4f transitions of Nd3+ appeared at 880, 1060, and 1330 nm. The scintillation decay time constant of the sample was approximately 500 μs. | |
| DXRp1-11 | Observation of Reduction of Sm3+ into Sm2+ by X-ray Irradiation in Sm-doped Al6Si2O13 Ceramics *Kensei Ichiba1, Takumi Kato1, Daisuke Nakauchi1, Noriaki Kawaguchi1, Takayuki Yanagida1 1. Nara Institute of Science and Technology (Japan) |
| Sm-doped Al6Si2O13 ceramics was synthesized, and radiophotoluminescence (RPL) properties were evaluated. After irradiation with X-ray, the new emission lines due to the 4f–4f transitions of Sm2+ ions were observed. The lower detection limit of the Sm-doped sample was 100 mGy. The Sm-doped Al6Si2O13 is a promising RPL material. | |
| DXRp1-12 | Characterization of Carrier Transport Properties of Diamond Stacked Structures Using α-particles *Tomoaki Masuzawa1, Taku Miyake2, Takayuki Nakano1, Katsuyuki Takagi1,2, Toru Aoki1,2, Hidenori Mimura1, Takatoshi Yamada3 1. Shizuoka University (Japan), 2. ANSeeN Inc. (Japan), 3. National Institute of Advanced Industrial Science and Technology (Japan) |
| In order to understand the operational mechanism of boron-doped/undoped diamond radiation detectors, the carrier transport properties of the diamond detectors were characterized using alpha particles as an input. The bias dependance of the radiation signal indicated that carrier transport between the boron-doped/undoped layers played an essential role in radiation detection. | |
| DXRp1-13 | Impact of Buffer Layer in BGaN Growth on QST Substrates *Atsuhiro Hayashi1, Shun Nishikawa1, Kota Matsumoto2, Norikazu Ito2, Taketoshi Tanaka2, Ken Nakahara2, Yoku Inoue1, Toru Aoki1, Takayuki Nakano1 1. Shizuoka University (Japan), 2. ROHM Co., LTD (Japan) |
| BGaN is expected as a novel neutron detection material. BGaN epitaxial growth for fabricating the diode device is difficult due to the small size of B atoms compared to Ga atoms and the strain in BGaN. To fabricate high-quality BGaN, strain controll is important, and the crack generation must be suppressed. In this study, the influence of strain on BGaN growth due to the changing ... | |
| DXRp1-14 | Enhancing DX Sensor Sensitivity and High Quality Radiation Detector Through Hybrid Active Layers of PBDB-T:ITIC and CdSe Core 2D Nanoplatelets *Son Jae Won1, Kang Jung Won1, Park Se Jun1, Ahn Ye Hwan1, Liu Hailiang1 1. Dankook University (Korea) |
| In order to improve the sensitivity of DX Sensor, five different amounts of 2d nanoplatelets were proposed and examined. Sensitivity and current density were measured and then compared with those properties 0wt% of inorganic 2d nanoplatelets. The proposed sensitivity showed 31.8% higher efficiency than the pure condition of hybrid x-ray detector. |
Topical Session on Image Sensing Technologies
| Dec. 5 | 13:30-14:50 | Room 108 | IST1 | Sensors and Circuits |
| Dec. 5 | 15:20-16:40 | Room 108 | IST2 | Special Sensors and Peripheral Circuits |
| Dec. 6 | 9:00-10:20 | Room 108 | IST3 | Sensor Applications |
| Dec. 6 | 10:50-11:50 | Mid-sized Hall A | AMD6/IST4 | Active-Matrix Sensing and Imaging Technologies |
| Dec. 6 | 13:30-14:50 | Small Hall | IST5 | IST Latenews Session |
| Dec. 5 | 11:10-12:30 | Main Hall | ISTp1 | Image Sensing Technologies |
| Dec. 5 | 11:10-12:30 | Main Hall | ISTp2 | IST Related mLED |
| Dec. 5 | 11:10-12:30 | Main Hall | ISTp3 | IST Related to Quantum Dots |
IST1: Sensors and Circuits
Dec. 5 13:30-14:50 Room 108
Chair: Takashi Tokuda (Tokyo Tech.)
Co-Chair: Masayuki Ikebe (Hokkaido University)
| IST1-1
13:30 |
Invited The Image Sensor Technology: Building the Foundation for Information Sensing Societies *Shinichiro Eto1 1. Sony Semiconductor Solutions (Japan) |
| Image sensors have evolved from their role in cameras to technologies that enable object recognition, decision-making, and information acquisition. This article explains the development of CMOS image sensor device technology and advancements in sensing technologies. Furthermore, it introduces the societal transformation caused by the penetration of information sensing. | |
| IST1-2
14:10 |
Quantization-Error Suppression of a VCO-based ADC *Yoshihiro Komatsu1, Takuto Togashi1, Tomo Tanaka2, Ryota Yuge2, Masahiko Sano2, Seiji Kurashina2, Masayuki Ikebe1 1. Hokkaido University (Japan), 2. NEC Corporation (Japan) |
| We have developed a method to convert the current generated by a resistance change sensor array into digital values using VCO-ADCs or integrating ADC. However, VCO-ADC has a quantization error problem, while integrating ADC has a conversion time problem. Therefore, we propose an ADC that combines both methods and compensates for their shortcomings. | |
| IST1-3
14:30 |
Active Driving Gap-Type Photo-Transistors Array for Contactless Gesture Detection *Yanling Chen1, Zhichao Zhou1, Yiyi Zhu2, Xiaoliang Zhou1, Lei Qiao1, Hejing Sun1, Zhiwei Tan1 1. Shenzhen China Star Optoelectronics Co., Ltd (China), 2. The Hong Kong University of Science and Technology (Hong Kong) |
| This article introduces an active-driving gap-type photo-transistors array seamlessly merging a gap TFT sensor with a dual-gate switch TFT, both employing hydrogenated amorphous silicon thin film transistors . Experimental findings showcase the remarkable response properties of the pixel circuit, particularly for contactless fingers detection. |
IST2: Special Sensors and Peripheral Circuits
Dec. 5 15:20-16:40 Room 108
Chair: Tomoyuki Yokota (The University of Tokyo)
Co-Chair: Masayuki Ikebe (Hokkaido University)
| IST2-1
15:20 |
Proposal of Contact Lens Camera Using Distributed Single-pixel Imaging *Youjia Gu1, Yasuhiro Takaki1 1. Tokyo University of Agriculture and Technology (Japan) |
| The distributed single-pixel imaging technique is proposed to realize the contact lens camera which can be used in the contact lens display. Multiple sensor units consisted of a lens, a fixed mask, and a photodiode are used. The proposed technique consumes much lower energy than the conventional camera using a 2D image sensor and the conventional single-pixel imaging system. The preliminary experimental results are provided. | |
| IST2-2
15:40 |
A CMOS Temperature Sensor with Threshold Voltage Compensation *Takuto Togashi1, Yoshihiro Komatsu1, Tomo Tanaka2, Ryota Yuge2, Masahiko Sano2, Seiji Kurashina2, Masayuki Ikebe1 1. Hokkaido University (Japan), 2. NEC Corporation (Japan) |
| We have designed a temperature sensor that operates in the subthreshold region and does not require calibration. Here, we discuss the problems and solutions involved in converting the output of the temperature sensor into digital form using a single-slope ADC. | |
| IST2-3L
16:00 |
Invited Sub-100 µm Precision Time-of-Flight Image Sensors and Their Applications *Keita Yasutomi1, Shoji Kawahito1 1. Shizuoka University (Japan) |
| This paper presents a high-precision Time-of-Flight image sensor and system for 3D scanning application. The prototype sensor achieves sub-100 μm precision through impulse photocurrent response, lateral electric field modulation, and charge-injection reference plane sampling for jitter reduction. |
IST3: Sensor Applications
Dec. 6 9:00-10:20 Room 108
Chair: Masayuki Ikebe (Hokkaido University)
Co-Chair: Masahide Goto (NHK)
| IST3-1
9:00 |
A Method for Estimating the Position of an Observer Using a Single Webcam Based on 3D Gaussian Splatting *Meng Yi Chen1, Kuo-Jui Hu1, Yi-Fei Chen1, I-Chuin Chen1 1. National Taiwan University of Science and Technology (Taiwan) |
| This research explores how to use a single webcam to evaluate the position of a target object within the capture range. Subsequently, the single webcam on the monitor will be used to determine the relative position between the target observer and the monitor, enabling color adjustment of the image content. | |
| IST3-2
9:20 |
Improving Light Utilization Efficiency in Incoherent Digital Holography with Aperture Control *Tetsuhiko Muroi1, Teruyoshi Nobukawa1, Nobuhiro Kinoshita1, Kei Hagiwara1 1. Japan Broadcasting Corporation (NHK) (Japan) |
| We propose an optical configuration for incoherent digital holography with aperture control, constructed solely with transmissive optical elements. This configuration enhances light utilization efficiency twofold compared to our previous design. We have verified that aperture control increases the hologram signal amplitude and the contrast ratio of the reconstructed image. | |
| IST3-3
9:40 |
Performance Analysis of Under-Display Lensless Facial Recognition System *Min-Hsuan Chung1, Sih-Wei Chen1, Kun-Yuan Lin1, Chieh-En Lee1, Chung-Hao Tien1 1. National Yang Ming Chiao Tung University (Taiwan) |
| We proposed the first under-display lensless facial recognition system. The system can preserve user privacy by employing a binary coded mask with the deep learning model for feature extraction and enhance flexibility by adapting to various number of classes. Results highlight the system's robustness to horizontal movements and potential for face recognition. | |
| IST3-4
10:00 |
Reconstruction of Diffused Images Using Neural Networks: Examining Restoration Capabilities across Blurring Levels *I Hsuan Kuo1, Jia Lun Wu1, Chieh En Lee1, Chung Hao Tien1 1. National Yang Ming Chiao Tung University (Taiwan) |
| To address image blurring caused by optical diffusers, we utilized a neural network for restoration and implemented phase modulation, resulting in enhanced restoration of fine details. Our approach improved image reconstruction and demonstrated robust performance, validating the method's effectiveness. |
AMD6/IST4: Active-Matrix Sensing and Imaging Technologies
Dec. 6 10:50-11:50 Mid-sized Hall A
Chair: Hideya Kumomi (Japan S&T Agency)
Co-Chair: Masayuki Ikebe (Hokkaido University)
| AMD6/IST4-1
10:50 |
Invited Conformable Organic Image Sensor for Bioimaging *Tomoyuki Yokota1 1. The University of Tokyo (Japan) |
| We developed a conformable organic image sensor comprising low-temperature polycrystalline silicon thin-film transistors and organic photodiodes. The conformable organic image sensor has a high-resolution and high-speed readout characteristics. These characteristics enable measurement of the pulse wave signal and capture images of fingerprints and veins. | |
| AMD6/IST4-2
11:10 |
Invited Integration of Organic Photodetector (OPD) into OLED Displays for Sensing Applications *Taisuke Kamada1, Kazuya Sugimoto1, Yasuhiro Niikura1, Ryo Hatsumi1, Kazunori Watanabe1, Daisuke Kubota1, Sachiko Yamagata1, Shunpei Yamazaki1 1. Semiconductor Energy Laboratory Co., Ltd. (Japan) |
| We propose novel methods for integrating organic photodetector (OPD) into OLED panels for sensing applications such as fingerprint authentication. Our newly developed device called OLED/OPD dual-mode device and metal maskless lithography (MML) technology enable the integration without harming the display performance of OLED panels. | |
| AMD6/IST4-3
11:30 |
Invited Curved CMOS Image Sensors Developed by SOI Transfer Technology *Masahide Goto1, Shigeyuki Imura1, Hiroto Sato1 1. NHK Science & Technology Research Laboratories (Japan) |
| We report the development of curved complementary metal-oxide-semiconductor image sensors (CISs) using silicon-on-insulator transfer technology. The 11-μm-thick device layer was transferred to a flexible substrate and mounted on a cylindrical concave stage. The curved CISs successfully operated, demonstrating lens aberration correction. This development highlights the potential for various flexible devices, including sensors, memories, and displays. |
IST5: IST Latenews Session
Special Topic of Interest on Artificial Intelligence and Smart Society
Dec. 6 13:30-14:50 Small Hall
Chair: Masayuki Ikebe (Hokkaido University)
Co-Chair: Takashi Tokuda (Tokyo Tech.)
| IST5-1L
13:30 |
Stabilizing Digital Holography Using Events *Ittetsu Uchiyama1, Chihiro Tsutake1, Keita Takahashi1, Toshiaki Fujii1 1. Nagoya University (Japan) |
| We propose a method for stabilizing digital holography, which leverages an event camera and self-supervised deep learning to deblur the acquired holograms. We experimentally demonstrate that our method is robust to vibrations primarily caused by the movement of optical systems. | |
| IST5-2L
13:50 |
Low-light Image Enhancement with A.I. Model MIRNet and Bilateral Edge Detectors *Yi-Tsung Pan1, Kuo-Jui Hu1, I-Chun Chen1, Hsiang-Yu Tsai1, Ching-Chung Huang2, Ya-Ling Pan2 1. National Taiwan University of Science and Technology (Taiwan), 2. National Changhua University of Education (Taiwan) |
| People who often get low light images in poor light environment. How to restore a high-quality image from a low-light image and recover the missing high-quality image content and edges is the main research. This research using 2 streams to obtain the high-quality images content and edges simultaneously. The MIRNet learns an enriched content of low-light images, and using bilateral edge detectors to obtain the edges ... | |
| IST5-3L
14:10 |
Estimating Scene Luminance Levels from Images Using Deep Learning *Ya-Hsuan Lin1, Pei-Li Sun1, I-Chin Wu2, Min Di2 1. National Taiwan University of Science and Technology (Taiwan), 2. Institute for Information Industry (Taiwan) |
| This study used ResNet, a CNN-based deep learning model, to predict scene luminance levels from RGB images. ResNet effectively captures complex image features to accurately predict the scene luminance levels for both high-quality DSLR camera images and low-quality video images. | |
| IST5-4L
14:30 |
Internal Compensation Pixel Circuit for X-ray Sensor Under Depletion Mode Oxide TFT *Jang Hoo Lee1, Young Jin Kim1, Hye Won Yun1, Seung Jae Moon2, Byung Seong Bae1 1. Hoseo University (Korea), 2. Ulsan National Institute of Science and Technology (UNIST) (Korea) |
| Oxide thin-film transistors (TFTs) exhibit high stability under X-ray exposure but show a negative VTH shift, causing reliability issues. The proposed pixel circuit uses an internal compensation structure, reducing the maximum error rate to 6.5%. This improves error rates compared to conventional pixel circuits. |
ISTp1: Image Sensing Technologies
Dec. 5 11:10-12:30 Main Hall
| ISTp1-1 | Characterization of Electrical Crosstalk in PbS Quantum Dot CMOS Image Sensors for Ultra-High-Resolution Imaging *Yixin Zheng1, Guang Hu1, Kaijie Lu1, Jun Tang1, Wei Chen1, Junjie Hao1, Haodong Tang1 1. Shenzhen Technology University (China) |
| The electrical crosstalk of QD-based CMOS image sensors is studied in this work. We modified existing crosstalk models to suit QD-CIS systems and designed specialized electrode patterns to analyze electrical crosstalk in multi-pixel QD photodiode devices, refining predictions and improving sensor architecture for high-quality imaging applications. | |
| ISTp1-2 | Composite Autostereoscopic Images Based on Multi-View Photography System *Wei-Lin Chen1, Tzung-Han Lin1 1. National Taiwan University of Science and Technology (Taiwan) |
| This study aims at composition of autostereoscopic photo-frames. The proposed multi-view photography system was utilized. The acquired images were rectified and superimposed in a virtual background, and then converted into the multipixel lenticular format. Subsequently, high-quality 3D photo-frames are produced using UV curing inkjet printer to have lifelike three-dimensional effects. | |
| ISTp1-3L | No Metal Electrode Fully Transparent Gallium Oxide Solar-Blind Photodetector *Liwen Wang1, Tai-Yu Wu 1, Sheng-Yuan Chu1 1. National Cheng Kung University (Taiwan) |
| This article presents a fully transparent solar-blind photodetector without a metal electrode. It has a simple two-layer structure of gallium zinc oxide and gallium oxide. The device only needs an ultra-low applied voltage of 0.0055V, a 20-times on-off ratio, and over 88% transmittance. | |
| ISTp1-4L | Tongue-Cleaning Simulator for Oral Care Assistance *Kouta Wada1, Masayuki Ikebe1, Atsushi Mitani2, Masumi Muramatsu2, Kota Fujiura3, Masahiro Yamanaka3, Morio Ochi3 1. Hokkaido University (Japan), 2. Sapporo City University (Japan), 3. Health Sciences University of Hokkaido (Japan) |
| Oral care is important for maintaining and restoring oral function, and there is a need for development of educational tools for oral care. As a first step, we developed a prototype of tongue cleaning simulator that enables sensing and visualization of tongue care status. The goal of this simulator is to help teach tongue cleaning techniques for a variety of patient tongues. | |
| ISTp1-5L | Embedded a-Si Photo-Transistor Sensors Integration in Remote Optical Touch-Input Panel Using Four-Mask Process Architecture Technology *Fengyun Yang1, An-Thung Cho1, Yong Zhang1, Ming-liang Wang1, James Hsu1, Wade Chen1 1. Chuzhou HKC Optoelectronics Technology Co.Ltd. (China) |
| An optical type touch-input flat panel is designed. The driving system is based on the passive pixel sensor array with amorphous silicon TFT technology. The embedded sensing structure of the optical sensor is using the a-Si TFT phototransistor and four-mask process architecture technology. This paper presents a primary optical pixel sensor circuit that utilizes hydrogenated amorphous silicon photo-transistor sensor. | |
| ISTp1-6L | Integrated In-Cell Ambient Light and Color Temperature Sensors in TFT-LCDs Using a-Si Photo-Transistor and Color-on-Array (COA)/Four-Mask Process Technology *Ting Ting Ruan1, Cho An Thung1, Feng Yun Yang1, Young Zhang1, zhengYou Zheng Lu1, Lu Mao1, Wen Xin Li1, ming Liang Wang1, James Hsu1, Wade Chen1 1. HKC Optoelectronics Technology Co., Ltd., (China) |
| We have developed a new AMLCD with multiple ambient light sensors (ALSs) for reducing backlight (BL) power consumption, and false sensing of ambient illuminance. ALSs perform well in showing BL control for power-saving, even though one of the sensors is covered by a finger shadow. Photo-electrical characteristics with well linearity and reliability under long-term operation were observed. |
ISTp2: IST Related mLED
Special Topic of Interest on Micro/Mini LEDs
Dec. 5 11:10-12:30 Main Hall
| ISTp2-1L | Exploration of Lithium Aluminate and Gallate Phosphors for SWIR Emitting pc-LEDs with Single-Doped Ni2+ *Yen-Ling Kuo1, Yi-Ting Tsai2, Mu-Huai Fang2 1. National Taipei University of Technology (Taiwan), 2. Academia Sinica, Research Center for Applied Sciences (Taiwan) |
| A series of novel short-wave infrared (SWIR) phosphor LiGa5(1−x)Al5xO8:0.05Ni2+ were successfully prepared, which exhibit intense SWIR emission. A phosphor-converted light-emitting diode (pc-LED) package provided is fabricated. This study offers new insights into Ni2+ doped emission phosphors and highlights their potential for LED applications. |
ISTp3: IST Related to Quantum Dots
Special Topic of Interest on Quantum Dot Technologies
Dec. 5 11:10-12:30 Main Hall
| ISTp3-1L | Fluorescent Smart Textiles with Infrared Quantum Dots for AI-Driven Image Recognition *Yi-Ting Tsai1, Mu-Huai Fang1 1. Academia Sinica (Taiwan) |
| Our study explores the integration of short-wave infrared quantum dots with natural fibers for artificial intelligence (AI) recognition. By synthesizing hydrophilic quantum dots, the modified fibers exhibit improved optical properties and AI recognition capabilities. The findings highlight the 87% accuracy and functional smart textiles to promote human healthy in future |
Topical Session on Metaverse System
| Dec. 5 | 9:00-10:20 | Room 206 | MVS1/VHF3 | Vision and User Interaction for Metaverse Systems (1) |
| Dec. 5 | 10:50-11:50 | Room 206 | MVS2/VHF4 | Vision and User Interaction for Metaverse Systems (2) |
| Dec. 5 | 13:30-14:50 | Room 206 | MVS3/3D4 | Metaverse System and World |
| Dec. 5 | 15:20-16:20 | Room 206 | MVS4 | Metaverse Systems and Applications |
| Dec. 5 | 17:10-18:10 | Room 206 | MVS5 | The Future and Standardization of Metaverse Systems |
| Dec. 6 | 10:50-12:10 | Room 204 | MVS6/PRJ9/3D7 | Metaverse Technologies for Automotive |
| Dec. 6 | 13:30-14:50 | Room 204 | 3D8/MVS7 | 3D Systems for AR/VR |
MVS1/VHF3: Vision and User Interaction for Metaverse Systems (1)
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 5 9:00-10:20 Room 206
Chair: Munekazu Date (Tokushima Bunri University)
Co-Chair: Yuzo Hisatake (Shizuoka University)
| MVS1/VHF3-1
9:00 |
Invited Improved Depth Perception and Usability of Aerial Displays *Haruki Mizushina1,2, Kohei Yamamoto2, Yasunori Terao2, Shiro Suyama2,3, Kenji Yamamoto2 1. Shinshu University (Japan), 2. Tokushima University (Japan), 3. Utsunomiya University (Japan) |
| This paper proposed methods for improving stable depth perception and usability of aerial displays. Controlling vergence angle of the observer is effective on the stability of depth perception of aerial images. Usability of aerial displays can be improved by feedback with multiple modalities. | |
| MVS1/VHF3-2
9:20 |
Utilization and Visibility of Gaze-Reactive Blur in AR-Based Character Display *Yuta Machigashira1, Haruki Mizushina1,2, Munekazu Date3, Kenji Yamamoto1 1. Tokushima University (Japan), 2. Shinshu University (Japan), 3. Tokushima Bunri University (Japan) |
| We conducted sensory test for visibility of blurred virtual characters and analyzed it to investigate the way to improve the user's visibility on AR display. We removed blur from virtual character at the gaze position (blur-removed AR) and we added blur to virtual characters in periphery of field of view (blur-added AR). The results show that blur-added AR is better in analysis with response ... | |
| MVS1/VHF3-3
9:40 |
The Effect of Choice on Motivation in Continuous Engagement *Ayumu Watanabe1, Shigehito Tanahashi1 1. Niigata University (Japan) |
| We examined the effect on motivation of with or without a choice of exercise environment over a continuous task of exercising four times a week for two weeks. We found that the continuous choice is beneficial for maintaining higher intrinsic motivation than the no-choice. The results suggested that continuous choice facilitates the improvement of exercise habits. | |
| MVS1/VHF3-4L
10:00 |
Invited Synergy and Medial Effects of Auditory and Electrostatic Force Cueing on Visual Field Guidance in 360° VR *Yasuhito Sawahata1, Masamitsu Harasawa1, Kazuteru Komine1 1. Japan Broadcasting Corporation (Japan) |
| This study examines the use of multimodal cues, including auditory and electrostatic haptic feedback, to guide users' visual fields in 360° VR. Results show that these cues improve target detection in a VR visual search task, with performance influenced by balancing sensory uncertainties. The results suggest that optimizing multimodal cueing can improve the quality of spontaneous 360° VR viewing experiences. |
MVS2/VHF4: Vision and User Interaction for Metaverse Systems (2)
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 5 10:50-11:50 Room 206
Chair: Haruhiko Okumura (Toshiba corp.)
Co-Chair: Takashi Shibata (Tokai University)
| MVS2/VHF4-1
10:50 |
Image Precorrection Based on Gradient Descent for Mitigating Vergence-Accommodation Conflict in AR/VR Displays *Pei-Chia Tsai1, Chieh-En Lee1, Chung-Hao Tien1 1. National Yang Ming Chiao Tung University (Taiwan) |
| Augmented and virtual reality (AR/VR) technologies are rapidly advancing, yet the optical design of AR/VR headsets often leads to vergence-accommodation conflict (VAC), causing user discomfort. This paper presents an image precorrection algorithm based on gradient descent method that adjusts display images to reduce defocus effects and VAC. | |
| MVS2/VHF4-2
11:10 |
Image Size on Retina of Aerial Image Formed Just Behind Viewing Eyes in Ultra-Wide Field-of-View Display *Hiroki Takatsuka1, Takumi Watanabe1, Shiro Suyama1, Munekazu Date2, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan), 2. Tokushima Bunri University (Japan) |
| Immersive experience is possible by covering the field of view with images. We have realized ultra-large image size on retina when the aerial image is formed just behind viewing eyes. The closer to the aerial image position, the larger the image on retina became. A ultra-large image is confirmed at the position formed just behind the eyes. | |
| MVS2/VHF4-3
11:30 |
Curved Aerial 3D Image by Projecting 3DCG Image Onto a Concave Screen and Interaction Between Planar Operations by Use of a 2D Sensor and 3D Space *Ryota Yamada1, Takumi Watanabe1, Mayu Adachi1, Shiro Suyama1, Hirotsugu Yamamoto1 1. Utsunomiya University (Japan) |
| A novel interaction with an aerial convex 3D image has been realized by correlating a 2D sensor plane operation and 3D space. The convex aerial 3D image can be formed by use of concave object as a light source in aerial imaging by retro-reflection (AIRR). Projecting a spherically distorted image on a concave screen with a projector can compensate the convex curved image. |
MVS3/3D4: Metaverse System and World
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 5 13:30-14:50 Room 206
Chair: Kenji Yamamoto (Tokushima University)
Co-Chair: Hayato Watanabe (NHK)
| MVS3/3D4-1
13:30 |
Invited Research and Development of Real and Cyber Fusion to Achieve “Project Metaverse” for Well-being Society *Hiroshi Chigira1 1. NTT Corporation (Japan) |
| In this paper, toward our goal of “Project Metaverse” to directly apply experiences on a metaverse to the real world, we present our recent research activities, such as; 1)TENGUN Ogijima, a point cloud based metaverse achieved by LiDAR data and vibro-tactile recording. 2) XR display technologies, such as Mirror Transcending Aerial Imaging(MiTAI), and Glasses-Free “AISEKI” XR system. | |
| MVS3/3D4-2
13:50 |
Metaverse for Everyone: Open-Source Web-Based Metaverse System Chutvrc *Kenichiro Ito1, Yong-Hao Hu1 1. The University of Tokyo (Japan) |
| This study proposes a web-based open-source metaverse software “chutvrc.” As a successor to Mozilla Hubs, it aims for high extensibility and customizability, targeting general-purpose use similar to standard websites. Aimed to be accessed from various devices and display environments, including VR equipment, PCs, smartphones, and tablets, it enables the metaverse with interconnectivity and interoperability. | |
| MVS3/3D4-3
14:10 |
Invited Implementation of Interactive Mirror-Transcending Aerial Imaging System *Motohiro Makiguchi1 1. NTT Corporation (Japan) |
| Many methods have been proposed for presenting digital information in mirror space. However, most existing methods can only display digital information in mirror space. This paper introduces the concept and implementation of MiTAI (Mirror-Transcending Aerial Imaging), which allows for the continuous movement of digital information between mirrors and physical space. | |
| MVS3/3D4-4
14:30 |
Invited Optimizing Illumination Spectrum for Enhanced Spectral Color Appearance Control *Mariko Yamaguchi1 1. NTT Corporation (Japan) |
| We have developed an innovative lighting system that changes specific target colors while maintaining a natural white appearance, by using implementing precisely spectral controlling of the spectral power distribution of illumination and metamerism. It was successfully showcased at the Paris Fashion Week 2024 Spring/Summer. |
MVS4: Metaverse Systems and Applications
Dec. 5 15:20-16:20 Room 206
Chair: Masaya Adachi (Japan Display Inc.)
Co-Chair: Kenichiro Ito (The University of Tokyo)
| MVS4-1
15:20 |
Invited Enhancing Human Communication Through a Highly Transparent and Two-Way Viewable Display *Kentaro Okuyama1, Tenfu Nakamura1, Koji Kitamura1, Kazuki Ichihara1, Takayuki Imai1, Chiehan Chien1, Naoyuki Asano1 1. Japan Display Inc. (Japan) |
| We developed a 20.8-inch highly transparent display that can show information on the front and rear sides for face-to-face communication. The display, placed between people, promoted people's understanding of explanations by enabling them to check the same related images on both sides while also confirming each other's immediate facial expressions or reactions through the display. | |
| MVS4-2
15:40 |
Invited REXR: Realistic and Expressive 3D Avatar for Immersive Telepresence *Hiroshi Ando1, Michal Joachimczak1, Juan Liu1 1. National Institute of Information and Communications Technology (Japan) |
| We propose REXR (Realistic and EXpressive 3D avataR) technology, which leverages AI-based methods to create a photo-realistic 3D avatar of a person from 2D webcam images and reproduce his/her subtle facial expressions and gestures through the 3D avatar in real time, enabling 3D immersive experiences of telecommunication. | |
| MVS4-3L
16:00 |
Distance Measurement Using One Monocular Camera with a Liquid Crystal Panel *Hirondo Nakatogawa1, Hitoshi Tanaka1, Yoshiro Aoki1, Fumiyuki Okuni1, Miharu Otani1, Takeshi Shimano2, Yusuke Nakamura2 1. Japan Display Inc. (Japan), 2. Hitachi, Ltd (Japan) |
| We measured the distance between objects using onlyone monocular camera by deploying a liquid crystal (LC)panel. We utilized a stereo-matching method between twostereo images acquired by one monocular camera. Theaverage of the estimated distance had good linearity withthe actual distances, and the coefficient of variation wasless than 2.1% (within 25 m). |
MVS5: The Future and Standardization of Metaverse Systems
Dec. 5 17:10-18:10 Room 206
Chair: Yuzo Hisatake (Shizuoka University)
Co-Chair: Masaki Yasugi (Fukui Pref. University)
| MVS5-1
17:10 |
Invited Standardization Trends on Metaverse and Other Multimedia Technologies in ITU-T SG16 *Masahito Kawamori1,2 1. International Telecommunication Union (Switzerland), 2. The University of Tokyo (Japan) |
| In this paper, we will describe the recent trends in metaverse related standards, as well as other multimedia technologies that are being developed in ITU-T SG16. | |
| MVS5-2L
17:30 |
Invited Designing Places for Informal Communication *Hideaki Kuzuoka1, Chi-Lan Yang1 1. The University of Tokyo (Japan) |
| Informal communication is effective in alleviating remote workers' perceived loneliness, promoting collaboration, and maintaining good relationships between weak-ties. Thus, to support informal communication between remote workers, we introduce two systems. Coffee-Talkie promotes asynchronous communication while a cup of coffee is brewed. A small robot, TransGazer-M encourages serendipitous conversations by switching between two kinds of gazes. |
MVS6/PRJ9/3D7: Metaverse Technologies for Automotive
Special Topic of Interest on Automotive Displays
Dec. 6 10:50-12:10 Room 204
Chair: Satoshi Ouchi (Hitachi)
Co-Chair: Kazuhiro Ohara (Visitech)
| MVS6/PRJ9/3D7-1
10:50 |
Invited Recent Developments of Holographic Contact Lens Display *Yasuhiro Takaki1 1. Tokyo University of Agriculture and Technology (Japan) |
| Smart contact lenses, particularly those equipped for AR visual interface devices, have garnered considerable interest. Recently, the contact lens display using the holographic image generation technique has been proposed. This paper outlines recent developments in holographic contact lens displays and also introduces a new integrated camera technique. | |
| MVS6/PRJ9/3D7-2
11:10 |
Development of Optical System for Slim Design Headlights *Tomohide Morimoto1, Masashige Suwa1 1. Mitsubishi Electric (Japan) |
| Development of automobile headlights is important for not only safety, but also design of cars. Recently, we have developed RIR optical system and achieved thin design headlights. Here, we report the new optical system for slim design headlights with high light use efficiency. | |
| MVS6/PRJ9/3D7-3
11:30 |
New Optical Design of HUD Using Mirror Array Vision Extender *Chunmin Chen1, Miya Fang1 1. Shinyoptics Corp. (Taiwan) |
| A novel optical structure, mirror array vision extender (MAVE), is proposed to solve volume issue of head up display (HUD). This pioneering design, which employs a mirror array to extend the vertical field of view (FOV) and reduce the vertical dimension of HUD. In this design, we use 3 mirrors to prove the capability of this optical architecture. | |
| MVS6/PRJ9/3D7-4
11:50 |
Optimized Rectificaiton by Using Original Lens Projection for Fisheye Stereo Cameras *Hisayoshi Kaneda1, Kazusyohi Yamazaki1 1. Hitachi, Ltd (Japan) |
| We developed a novel method for optimizing stereo vision in fisheye lens cameras. This method uses the original lens projection for image rectification, resulting in a 50% reduction in the rectified image size of a 120° wide angle stereo camera from the perspective projection. Its reduction helps conserve memory capacity, providing a significant advantage in resource-limited environments like in-vehicle systems. |
3D8/MVS7: 3D Systems for AR/VR
Special Topic of Interest on AR/VR and Hyper Reality
Dec. 6 13:30-14:50 Room 204
Chair: Toshiaki Fujii (Nagoya Univ.)
Co-Chair: Nobuyuki Hashimoto (Japan Women's Univ.)
| 3D8/MVS7-1
13:30 |
Design of High-Performance Curved Waveguide Display Based on Freeform Polarization Volume Holograms *Jiacheng Weng1, Chunyang Pei1, Haifeng Li1, Rengmao Wu1, Xu Liu1 1. Zhejiang University (China) |
| Nowadays, waveguide displays are considered one of the most promising augmented reality solutions. Here, we propose a curved waveguide scheme using freeform polarization volume holograms as couplers. This scheme can accurately correct the aberrations of the curved waveguide and is easy to prepare. The designed systems with 1D/2D exit pupil expansion are demonstrated, achieving high-resolution display with a wide field of view and large ... | |
| 3D8/MVS7-2
13:50 |
Using Freeform Holographic Optical Elements to Optimize Free-Focusing AR Eyeglass Design *Rui Tan1, Qi Liu1, Haozhe Cui1, Muhamad Affiq Bin Misran1, Reiji Hattori1 1. Kyushu University (Japan) |
| Recent AR advancements heighten interest in head-mounted displays, but field of view (FOV) and eye box size remain challenges. This paper proposes freeform Holographic Optical Elements (HOEs) and optimized optical designs to develop AR eyeglasses with enhanced eye box mobility and an expanded FOV. | |
| 3D8/MVS7-3
14:10 |
Design of Lens-Array-Based Compact VR Optical Systems *Muhamad Affiq Bin Misran1, Kento Matsuo1,2, Rui Tan1, Qi Liu1, Yuji Teshima2, Reiji Hattori1 1. Kyushu University (Japan), 2. NIT, Sasebo College (Japan) |
| The proposed new optical system for VR devices using the lens array is lightweight and thin and can also achieve a wide viewing angle including eye rotation by using a flexible display. It is also shown that the boundaries between lenses can be hidden by making their width smaller than the pupil diameter. | |
| 3D8/MVS7-4
14:30 |
Visual Perception of Depth in Virtual Images Produced by Convex Lens *Sumio Yano1,2, Takumi Uemura3, Shuichi Ojima3 1. Shimane University (Japan), 2. RITECS Inc. (Japan), 3. Sojo University (Japan) |
| Monocular perception of depth distance to real objects and to virtual images created with a convex lens was investigated. Depth distance was underestimated for both real objects and virtual images. However, depth perception of virtual images increased with increasing distance, as did perceived depth and depth distance calculated from the ocular accommodation response. |