bluuebunny/crossref_metadata_2025 huggingface dataset:
42‐4: Binocular Camera Eye Tracking Algorithm for Naked Eye 3D Display
Authors: Wang Tingting , Tang Xiaojun , Sun Junmin , Wu Congrui , Shangguan Zeyu , Tang Darun , Liu Yuyu , Jiang Xingqun
Published: June 2024

Through real‐time acquisition of eye position using eye tracking, viewers can experience stereoscopic scenes from the naked eye 3D display. This paper proposes binocular camera eye tracking method that utilizes disparity to perceive the actual inter‐pupillary distance of different users. This method estimates the head posture based on facial landmark points and exploits camera projection to determine the spatial coordinate of the pupil. Furthermore, collaborative filtering approach is introduced to mitigate the jitter in pupil position. The experimental results demonstrate that the proposed algorithm enhances the performance in eye tracking compared to monocular method.
43‐1: Invited Paper: High PPI Printed OLED Display Developments
Authors: Wang Huifeng , Huang Wentong , Yan Longfei , Wu Di , Ma Kaihong , Shi Huaiting , Yu Jianwei
Published: June 2024

This paper reviews the progress of printed OLED technology in terms of high PPI, including pixel design and printing process. In addition, we have introduced a 300ppi plus top‐emission device using a new pixel design strategy that integrates a triangular pixel arrangement and a narrow channel structure. This technology enables printer to achieve the high resolution capabilities of monitor and notebook applications.
45‐2: High Performance and High Color Purity Green OLEDs with Narrow Spectra Emission
Authors: Li Guomeng , Li Baoyu , Zhang Di , Wang Hongyu , Song Wonjun , Zhu Xiujian , Jia Xiaoqin , Liu Song , Zhang Yuewei , Zhang Dongdong , Duan Lian
Published: June 2024

With the increasing performance demand from the display market, it has become ever more important to realize wide color gamut requirement. In this paper, we fabricated a series of pTSF green devices, the optimal devices which exhibit excellent performance in the range of CIEx 0.17‐0.22, with the central color point meeting Adobe's green light requirements, showing the advantages in wide color gamut. Additionally, they have comparable performance to existing phosphporescent devices under DCI‐P3 light color, showing the advantages of High Performance and High Color Purity
49‐2: 3D Applications: OLED Smartphone Glasses‐Free 3D Display Conversion System Based on 5G Communication Technology
Authors: Xie Yue , Surman Philip Anthony , Feng Ruoxiao , Chen Ningtong , Zheng Changxiong , Sun Xiao Wei
Published: June 2024

In recent years, driven by the advances in smartphone technology, there has been a surging demand from users for enhanced functionality and superior user experiences. With breakthroughs in ultra‐high‐resolution displays, mobile communication, and 3D content production, glasses‐free 3D smartphones have emerged as a potential market trend, promising users immersive 3D experiences. This paper presents a novel OLED smartphone glasses‐free 3D display conversion system based on lenticular lens technology, aimed at facilitating the widespread adoption of 5G communication technology. The system employs a specially designed phone case incorporating a lenticular lens sheet, enabling seamless switching between 2D and 3D display content on OLED, smartphones while ensuring the stability of 3D content presentation. Additionally, this paper introduces an optimization algorithm tailored for OLED glasses‐free 3D display pixel mapping, addressing color shift issues caused by selective sub‐pixel use in OLED displays with the Pentile Diamond sub‐pixel configuration. This algorithm significantly improves the image quality of OLED glasses‐free 3D displays, thereby enhancing the overall user experience.
50‐1: Invited Paper: Tunable Diffraction Phase Gratings and their Applications
Authors: Gushcho Yury Petrovich , Gushcho Marina Alexeevna
Published: June 2024

Our company has developed a new technology of phase modulation of light wave by means of tunable diffraction phase gratings. On this basis, a new class of electro‐optical Light Modulators Relief (LMR) with the following characteristics has been developed. Pixel switching frequency: up to 0.5 MH, efficiency: 98.6% (key competitors: Digital Micromirror Device (DMD) has 40%, Liquid Crystal on Silicon (LCoS) has 25%). High resistance to the laser radiation ‐ up to 100 W. Light polarization is not required. Diffraction optics with light flux up to 32 klm. Response time is 2‐7 microsecond. The theoretical resolution limit is 2000 lin/mm. The research program is over. The serial manufacture cost of LMR can be compared with the one of LCoS. The most promising applications of LMR are 1) pico‐projectors built into phone or laptop, 2) solid state scanning device without moving parts for LiDAR (Light Detection and Ranging) and other applications, 3) optical transponder for autonomous robots and vehicles, 4) holographic projectors, 5) terabyte memory, 6) next generation laser light source for car headlights, for office and household lights with controllable spectrum of light at any time. The technology is ready for industrial production. Modern industrial needs require not only minimising the price and physical volume of electro‐optical products, but also increasing the efficiency and processing speed, improving the information visualization technique with better functional and operational characteristics. These properties are fully possessed by the ultra‐fast electro‐optical LMR, which has no analogues in the world, developed by NanoRelief Display Ltd.
50‐2: Research on adaptive voltage regulation algorithm on TFT‐LCD
Authors: Deng Shijie , Wang Qiang , Jin Yufeng , Wu Yu
Published: June 2024

In the current global promotion of environmental protection and low‐carbon, to further reduce the power consumption of TFT‐ LCD, this paper proposes an algorithm based on image detection for adaptive adjustment of panel voltage and tests the algorithm on the monitor. The test results shows that the algorithm can achieve power reduction while maintaining image quality.
52‐2: Invited Paper: Intelligent Display Design Integrated in the 55 4K LCD Cell
Authors: Chen Dongchuan , Su Qiujie , Miao Yingmeng , Yang Tao , Liu Dong , Hu Pengfei , Shao Xinbin , Zhao Chongyang , Qin Wei , Qu Yingying , Lee Seungmin , Wang Wenchao
Published: June 2024

This paper presented intelligent display technologies integrated in the 55‐inch 4K LCD cell based on a‐Si process. Adaptive adjustment of backlight brightness and optimization of LC response time were achieved utilizing the ALS and TS integration. By using the novel GOA architecture and TCON IC, dynamic local refresh at any position and with different refresh rate at different area on panel were achieved. The power consumption of GOA and data drivers can be reduced by up to 50% respectively. This technology provides hardware foundation for the realization of AI intelligent display.
58‐1: Transflective ADS‐LCD with High Contrast Ratio and Wide Color Gamut for Better Productivity
Authors: Wang Jing , Cai Yangyang , Wang Bochang , Li Xiang , Zhang Yu , Wang Hetao , Li Shou , Bu Zhanchang
Published: June 2024

We have developed a high contrast and wide color gamut transflective ADS LCD with better porductivity. The proposed transflective LCD consists of a polarizer, an ADS negative LC layer, a diffusion film, a transflective layer, and a backlight unit, whose optical performance was excellent in transmissive‐mode and reflective‐mode.
62‐2: Optimizing Under Display Infrared Technology: A Comprehensive Analysis of Diffraction Issues
Authors: Wang Zhibin , Chi Longxing , Chang Yilu , Xu Xiaofeng , Qiu Jacky , Helander Michael
Published: June 2024

This study investigates the complex diffraction patterns arising from aperture arrays in Under Display Infrared (UDIR) sensors for facial recognition applications. Utilizing simulations and experimental data, we analyze diffraction effects based on aperture shapes and open area ratios. Our findings reveal that the diffraction issues are too complex to describe using only simple parameters like Transmittance. Our study emphasizes the need for sophisticated methodologies to accurately assess the performance impact of diffraction in UDIR applications.
63‐1: Invited Paper: Thin Film Neuromorphics: Fantasy or Reality?
Authors: Jiang Bowei , Wang Kai
Published: June 2024

Neuromorphic engineering/computing addresses key challenges that modern electronics is facing such as high power consumption and high computing cost. Neuromorphic circuits for neurons and synapses will become key components to enable future neuromorphic computing system. Taking haptics for an example, in physical world, human haptic system is used to establish tactile sensation and feedback between human skin and physical objects. In Metaverse, computer haptics is used to build tactile sensation and haptic rendering when interacting with a virtual object and leads to an emerging technological field. This topic will be of great interest to thin film technology community and others to foster a discussion on possibility of using thin film devices to design such circuits for flexible and large area neuromorphic system. Author Keywords
63‐2: Full degree‐of‐freedom liquid crystal holographic optics for AR/VR displays
Authors: Xiong Jianghao , Zhong Haizheng , Cheng Dewen , Wu Shin-Tson , Wang Yongtian
Published: June 2024

Liquid crystal polarization holograms (LCPHs) based on photo‐alignment and self‐assembled liquid crystal are attractive for the attributes like micrometer ultra‐thinness, high efficiency and dynamic tunability. Previous fabrication methods are limited in the degree‐of‐freedom (DoF) in both photoalignment process and liquid crystal deposition. This work presents an full‐DoF LCPH by freeform exposure and inkjet printing, which is exemplified by building a full‐color retinal scanning display without color crosstalk.
64‐1: Novel Highly Stable Organic Phosphors and Their Application to Cd‐free Color Conversion Sheets for Wide Color Gamut LCDs
Authors: Xu Fangrong , Wang Chengxin , Kanzaki Tatsuya , Sakaino Hirotoshi , Ichihashi Yasunori
Published: June 2024

In this study, organic phosphors of high color purity, high fluorescence quantum yield of over 90%, short emission decay time of less than 100 nanoseconds, and high stability that resists degradation even in the presence of oxygen were achieved. By using those organic phosphors, novel color conversion sheets for liquid crystal displays of wide color gamut without toxic elements such as cadmium were achieved. Those sheets can achieve an ultra‐wide color gamut that covers more than 99% of both DCI‐P3 standard and Adobe RGB standard, and more than 90% of BT.2020 standard. Also, those sheets can achieve a higher radiance than QD sheets without cadmium. So, they can be a promising alternative to QD sheets with cadmium. In addition, those sheets do not require a barrier film and do not show edge degradation, which is an issue with QD sheets. The resulting organic phosphors can be applied to various photoluminescence‐based applications and the cadmium‐free color conversion sheets can contribute to the development of environmentally friendly and energy‐saving displays.
66‐1: Progress and Technical Challenges of Trifold Display
Authors: Yuan Bo , Tan Fangxin , Zhang Leichao , Li Jiaoyang , Shen Ying , Wang Xiangqian
Published: June 2024

The module stack of trifold display was simulated and G‐type trifold modules were prepared. Surface waviness and mechanical properties were tested under room temperature. Cycle folding reliability of both in‐folding and out‐folding was tested simultaneously under room temperature, 60°/90% and ‐20° test environment (RA test). Waviness and reliability improvement of the G‐type trifold display by optimizing test jig, module material and stack. Finally, the failure of module peeling problem during cycle folding test under room temperature was analyzed.
68‐1: Invited Paper: Realization of High PPI Notebook using inkjet Printing Technology and IGZO Backplate
Authors: Shi Ting , Chen Xuebin , Li Xianglong , Li Guangyao , Han Baixiang , Liu Zhaosong , Li Jinchuan , Cao Weiran
Published: June 2024

TCL CSOT utilized inkjet printing technology to produce impressive medium and large‐size OLED products in the previous. In this work, high‐resolution notebook equipped with IGZO backplane is shown. This inkjet printing notebook offers 240 PPI along with good optical performance. Also, breakthrough in high‐resolution printing has been achieved, 274 PPI panel has been successfully printed. It is demonstrated that inkjet printing technology would adapt the trend of display products with various sizes toward higher resolution.
70‐4: Research on Bulging Mechanism of Super Clean Foam based on OLED
Authors: Du Yongqiang , Shi Huinan , Yang Yang , Li Kang , Li Feifan , Li Xin , Gong Qing , Gao Liang , Lu Xu , Kim Changman , Shang Fei , Qiu Haijun
Published: June 2024

In this paper, based on the OLED display module, this study firstly and systematically carries out the lamination from the material characteristics of SCF, flatness of the lamination interface, aspects of process parameters and so on. The mechanism of the bulge of SCF is revealed by analyzing the micro‐topography of the bulging interface after the reliability test. The results show that the bulge mainly occurs between the EMBO and the BF, and the root cause is that the EMBO is not activated. Further analysis shows that in the process of lamination, the dislocation of the interface occurs due to the force, which leads to the incomplete lamination of the EMBO and the BF, and then micro‐bubbles are generated at the interface, finally the residual micro‐bubbles are expanded by heat, and it causes bulge in the reliability test.
P‐1.12: Sub‐200nm Nano‐scale Indium‐Zinc‐Oxide Ultra‐thin Channel Transistors
Authors: Zhang Minghe , Xu Dengqin , Duan Ruibin , Shi Jianbing , Dong Junchen , Wang Yi , Han Dedong , Zhang Xing
Published: June 2024

Herein, nanoscale Indium‐Zinc‐Oxide (IZO) transistors are fabricated successfully in 5 nm channel thickness and 182.3 nm length, exhibiting excellent electrical properties including a high on‐state current (Ion) of 137 μA/μm, subthreshold swing (SS) of 70.87 mV/dec., turn‐on voltage (Von) of ‐0.12 V, low drain induced barrier lowering of 22.7 mV/V and preferable hysteresis. Our findings promote application of oxide transistors in advanced high‐definition displays and integrated circuits.
P‐1.17: High Performance Dual‐Gate a‐Si:H TFTs For High‐Refresh‐Rate LCDs
Authors: Zhang Shuren , Yue Qihui , Son Woosung , Peng Bangyin , Jou Mingjong
Published: June 2024

In this work, we report dual‐gate a‐Si:H TFTs using indium tin oxide (ITO) as top‐gate electrodes for achieving high‐refresh‐rate LCDs. The dual‐gate TFTs exhibit higher on‐currents than conventional TFTs by 24‐42% depending on the width of the top ITO gate on the passivation layer, which can significantly improve charging rate and picture quality for LCDs with a refresh rate above 240 Hz. However, the off‐current deteriorates with the increase of ITO width which is bad for image stick and leading to flickering issues. For the channel length of 5.2 µm, the ITO width of 2.5 µm would be the optimal condition. The influence of the thickness between the back channel and the ITO top gate is also investigated.
P‐1.18: Research on the Mechanism of Moving Head Pattern Aggravation after Reducing Refresh Rate of Column Architecture with High Refresh Rate
Authors: Chen Gongda , Wang Jinliang , Wang Shijun , Peng Zhou , Chen Xi
Published: June 2024

This paper mainly studies the mechanism of moving head pattern phenomenon of high refresh rate column architecture display products after the refresh rate is reduced. The mechanism is explained mainly from two aspects. First, the brightness of the positive frame and the negative frame is different, and the frame loss during the moving of the head cannot average the display frames. Second, when the VCOM is adjusted to the best, theoretically the positive and negative frame light and dark are the same, and there will be no moving head pattern, but when the frequency is lowered, the leakage current difference of positive and negative frame is amplified, and the brightness difference of positive and negative frame is amplified, and the moving head pattern is obvious. Due to the voltage difference between the three terminals of TFT during positive and negative frames. The difference ultimately leads to direct leakage current of positive and negative frames. This leads to a difference in brightness between positive and negative frames.
P‐2.1: Multi‐Scale Feature Fusion Generative Adversarial Network for Image Inpainting
Authors: Hu Lunze , Yuan Liujun , Hu Yanzhuo , Chen Enguo , Xu Sheng , Guo Tailiang , Ye Yun
Published: June 2024

Existing image inpainting networks may cause distorted image structures and blurred textures during restoration. Therefore, we propose an image inpainting algorithm based on Multi‐Scale Feature Fusion Generative Adversarial Network (MSFF). First, we use a Context Fusion Transformer Block (CFTB) to enlarge the receptive field of the defective image and reduce the feature loss caused by sampling. Second, we design an Aperture Attention Block (ATAB) to capture the shallow feature information and perform fine‐grained feature fusion. Finally, through the decoder, we generate high‐quality inpainted images step by step from coarse to fine. The results of multiple experiments show that our method has a better inpainting effect.
P‐3.4: Plenoxels‐based Parallax Map Generation for Flexible Scale Ultra‐High Resolution in 3D Imaging
Authors: Yang Changwei , Xiao Min , Jia Han , Xu Yunfei , Duan Hongji , Liu Xiaomin
Published: June 2024

This study is devoted to the development of a neural network‐free radial field flexible scale ultra‐high resolution parallax map generation method to improve the generation of ultra‐high resolution parallax maps for naked eye 3D display. In naked eye 3D display, the acquisition of parallax maps is crucial, the traditional method is to shoot the object by camera array, which requires high hardware conditions, in recent years, with the advancement of technology, the generation of parallax maps by Nerf has appeared, but this method generates lower quality images and requires a longer time to train the model, with a single GPU training taking more than one hour.

In this paper, we propose a method to generate parallax maps based on neural network‐free radial field and arbitrary scale super‐resolution, firstly, we generate sparse voxel mesh by neural network‐free radial field (Plenoxels), and the optimization time on a single Titan RTX GPU is more than ten minutes, and then we get parallax maps by setting up a virtual camera, however, the parallax maps obtained are low‐resolution and can't match with the size of the naked‐eye 3D displays, therefore, we introduce an arbitrary scale super‐resolution network for the parallax maps, and we get high‐resolution parallax maps and can match the size of the naked‐eye 3D displays.
P‐3.6: Study on the distribution of perceived brightness level based on HK effect in three‐dimensional CIELAB color space of laser display
Authors: Lv Fule , Guo Dabo , Yang Shuai , Yuan Guang
Published: June 2024

The current trend in display technology is towards achieving larger color gamut and higher brightness levels. However, it should be noted that visual perception of brightness intensity may differ from physical brightness intensity. The HelmholtzKohlrausch effect(H‐K effect) refers to the phenomenon where the perceived brightness of a color increases as its purity or saturation increases while keeping its luminance constant. In order to investigate the relationship between visual perception brightness and lightness, hue and color purity, an experiment was conducted using an RGB laser television as the display device. A total of 12 subjects participated in the visual perception brightness experiment. Based on the experimental results, the visual perceptual brightness for different color patterns was determined. Subsequently, a multilayer perceptron neural network was employed to depict the variation pattern of visual perception of brightness within the CIELAB color space. Finally, Fairchild's H‐K effect compensation formula was revised using nonlinear least squares method based on these experimental findings.
P‐3.7: A Review: Anti‐bacteria and Anti‐virus Healthy Displays †
Authors: Meng Xianqin , Xu Xiaoling , Liu Sha , Bu Qianqian , Jiang Mingxiao , Wu Jun , Li Fengming , Wang Dan , Liu Zhiqiang
Published: June 2024

Since COVID‐19, an anti‐bacteria and anti‐virus is becoming one of most important characters for products, including consumer electronics. This manuscript reviews several antibacterial and anti‐virus (AA) solutions for different type of electrical communication devices (ECDs), such as mobile, tablet personal computer, monitor and so on. Meanwhile, several AA material candidates and their adapter volume fabrication process will introduced and compared by analyzing its AA principle, antibacterial ratio, lifespan, optical properties, application possibility and adapted products. It can be used on the ECDs whoever have the touching screen, such as cellphones, tablets, and notebook, as well as the public interaction equipment in hospitals, restaurants, banks, transports and so on.
P‐5.2: Enhancing Volumetric Display Systems with an Effective Axis‐Shift Slicing Algorithm for Various Plane Pose Transformations
Authors: Song Hongzhan , Chen Zhendong , Chen Chao , Peng Bo , Hao Yinan , Xie Xiaohua
Published: June 2024

Three‐dimensional display has been a widely researched technology, offering an abundance of depth cues to enhance the overall visual experience. The volumetric display system has significant advantages due to its ability to be viewed from any angle and without the need for auxiliary devices. However, the issue of deviation between the rotating axis and the display plane was not taken into consideration in the previous systems. Therefore, we innovatively propose an axis‐shift slicing algorithm for volumetric display systems, leading to improved accuracy and reliability of the image slices data. Moreover, a prototype based on a novel collaborative control scheme as well as a creative software simulator is designed and implemented, laying the foundation for further development and refinement. Finally, the results from both simulations and experiments have demonstrated the effectiveness of the proposed axis‐shift algorithm and the designed volumetric display system.
P‐5.5: An Optimized Robust Watermarking Algorithm for Video Based on Spatio‐temporal Feature Fusion
Authors: Fan Yisheng , Li Jiandong , Yan Limin
Published: June 2024

In recent years, there has been an increase in video piracy. One potential solution that has been suggested is to add watermarks to videos as a means of encryption. The current robust watermarking algorithms for video based on deep learning have the problems of poor spatio‐temporal feature extraction ability as well as poor temporal consistency and imperceptibility. Thus, this paper proposes an optimized robust watermarking algorithm for video based on spatio‐temporal feature fusion. For the problem of poor spatio‐temporal feature extraction ability of traditional convolutional neural network for carrier video, we improve the 3D‐UNet framework by utilizing the ResNet residual connection and EAM, and design a codec with 3D Res‐EAM UNet structure, which enhances the network's ability of extracting spatio‐temporal features of video. For the problem of poor temporal consistency and imperceptibility of watermarked video, we propose an optimized robust watermarking optimization algorithm for video based on temporal and spatial feature fusion. For the problem of poor temporal consistency and imperceptibility of watermarked video, we propose a multi‐scale discriminator, which helps to extract complete watermark information from the video by generating antagonistic effects with the codec. The experiments prove that this algorithm works well and effectively improves the robustness of the video watermarking algorithm and the ability to resist time synchronization attacks.
P‐5.12: Research and Application of New Display Technology with Multiple Maximum Brightness Viewing Angles
Authors: Xu Chengyi , Zhang Lidian , Chen Shounian , Shu Yong , Park Byungin , Yu Yingchun , Cao Jie , Hu Yufei , Han Xuefeng , Zhang Dayu
Published: June 2024

This article realizes the directional propagation of light through the special microstructure design, and achieves the purpose of controlling the main display angle of LCD, and making the display product meet the actual needs of users. Taking the secondary display screen next to the notebook keyboard as an example, this design can be a way to increase the sense of use when the user views the display image from the side.
P‐5.25: Mechanical Design and Simulation Design of Support Layer of the Crossed Foldable Display Module
Authors: Cheng Yapeng , Li Lidan , Feng Zikang , Tang Jialiang , Dai Chao , Wu Yuanjun
Published: June 2024

In this paper, the concept of crossed foldable display module is proposed as follows: there are two foldable axes, and the two foldable axes intersect vertically. In order to realize the crossed foldable display, it needs to be designed in terms of modules, hinges and so on, especially the module support layer in the intersection area. In this paper, the steps of structural design, numerical simulation and sample verification are used to obtain two kinds of support layers suitable for crossed foldable modules, which can be folded hundreds of thousands of times without failure in the whole module test verification, providing a new form for flexible display.
P‐5.27: Outdoor 55‐Inch 4K‐resolution and High‐Brightness Liquid Crystal Display
Authors: Sun ZhiXin , Wang Xu , He XiaoJin , Tan ZhiWei , Liu ChunMing , Zhou Hang
Published: June 2024

This work addresses the design and verification of an outdoor 55‐inch 4K‐resolution and high‐brightness liquid crystal display (LCD) product. The new pixel design is able to increase the module transmittance to as high as 6.24%. The amorphous silicon (a‐Si) thin film transistor (TFT) has excellent light‐ and temperature‐stability. The gate drive circuit has been improved to reduce the operating temperature by 5~7 â„ƒ. The brightness of the display is up to 4056 nits, which is the brightest known 55‐inch 4K‐resolution display product.
P‐7.1: Research on VA type LCD wide viewing angle display technology
Authors: Yu Lesheng , Li Hanming , Li Ji , Kaichen
Published: June 2024

In order to achieve viewing angle enhancement (VAE) of Vertical Alignment (VA) type liquid crystal displays (LCD), this paper proposes a particle diffusion type wide viewing angle polarizer, and introduces the structure and preparation process of this wide viewing angle polarizer. The optical characteristics of the LCD can be controlled by adjusting the concentration of diffusion particles, the thickness of PSA and the coating speed.
P‐7.7: Study on Improvement of Aberrant TFT Pattern by Mask Design
Authors: Zhang Hejing , Liu Zhen , Lin Chunyan , Cho An-thung , Hsu James , Chen Wade
Published: June 2024

Abnormal TFT pattern were found after half‐tone exposure, development and etching process during the common "U" pattern type TFT process. The causes of abnormal TFT pattern were analyzed, and 9 kinds of TFTs with increased exposure dose in channel were designed in this paper. The experimental results showed that the 9 different designs of TFTs could solve the abnormal TFT pattern completely or partly. When the channel length at the position with the lowest exposure dose was designed to 5μm, the highest process tolerance was presented. Finally, a 32‐inch panel was produced by using TFT channel length with 4.7μm at the position of minimum exposure dose, and high yield & reliability results were obtained. Other types also provide improvement new idea for subsequent optimization.
P‐7.15: Mechanical Analysis of Tearing Risk of OLED Display Screen Based on Finite Element Method
Authors: Jiang Jiajun , Feng Zikang , Tang Jialiang , Dai Chao , Wu Yuanjun
Published: June 2024

The tearing process of the display screen module assembly induces stress on the panel, potentially causing panel failure and having adverse effects on production yield. However, the tearing of the screen involves numerous influencing factors, and there is currently a lack of systematic investigations into the individual effects of these factors. This work focuses on the aperture position on the panel in the tearing process by finite element analysis, analyzing the influences of aperture size, tearing direction, and the modulus of polarizing film and back plate film. The improvement recommendations resulting from this analysis were implemented in practical production, and no instances of aperture issues attributed to tearing were observed in the production of around three thousand screen modules.
P‐7.17: Analysis of the Influence Factors of LTPS‐TFT Characteristics on Module Brightness Stability
Authors: Zhang Lixian , Cheng Feiyue , Zhang Panlong , Huang Genmao , Wang Xiangqian , Shan Qi , Zhu Xiujian
Published: June 2024

In this paper, the influence of the type of interface treatment on the p‐Si surface (H2 or O2 plasma) and the SiH4 flow rate of SiOx on the characteristics stability of low‐temperature poly‐crystalline thin film transistors (LTPS‐TFT) has been investigated. The results indicate that H2 plasma is more effective than O2 plasma to repair low‐energy‐level defects at the interface of p‐Si layer and gate insulator layer (GI), and thus the threshold voltage (Vth) and subthreshold swing (ss) are smaller. And increasing the SiH4 flow rate of SiOx from 1900sccm to 3900sccm helps to form a defect‐reduced and more stable p‐Si film. Finally, the brightness degradation test shows that after aging for 24H with L255, the L3 brightness of base sample decreased by almost 32%, while improved sample decreased by only 8%.
P‐7.21: Novel Type of Mask Compensation Improves Incomplete Exposure Mura
Authors: Tao Bo‐Cheng , Qu Jiahui , Chiu Po‐Chun
Published: June 2024

In this article uses local brightness compensation to overcome the influence of Nikon exposure mechanism on mura imaging, and verifies the overall design BM line width for different resolutions, sizes. The final result is a high‐quality visual effect product, with a reduced defect rate for V‐bend mura on the 14 inch FHD and 16 inch 4K models. Compared to the background value, the brightness difference for L128 is less than 1.5 nits. In addition, combining different BM line widths from 4.7um to 5.5um also achieved the same trend. At present, the verification results have been imported into mass production.
P‐8.3: The Method to Calculate the Effect of Polarization Characteristics on Transmittance
Authors: Li Bowen , Wang Feifei , Zhan Hongming , Chen Xi
Published: June 2024

Transmittance is an important evaluation parameter of display equipment. High transmittance has better effects both on power dissipation and subjective visual feeling of image. In this paper, we reported a brand new method to simulate the transmittance considering the polarization characteristics of backlight unit. The new method optimized the test method of polarization characteristics of backlight unit, put forward an algorithm that can transfer polarization characteristics into parameters of polarizer database in Techwiz, changed the simulation way of Techwiz.
P‐8.8: The De‐mura scheme using a color camera to resolve the issue of color irregularity
Authors: Zhang ChenQi , Cheng Feng , Zhang Long , Zhang JinQuan , Gao XiaoYu
Published: June 2024

Demura technology, which is based on monochrome cameras, has been widely implemented in the production of AMOLED displays during industrialization. This technique uses a monochrome camera to capture red, green and blue images for mura compensation, and provides enhanced compensation for mura that may be visible in these mono images, resulting in a significant reduction to the point of near invisibility. However, this technical solution has limitations since compensating for color spots and large color unevenness is generally effective, but the enhancement is minimal. Therefore, The scheme we are investigating is based on the color camera De‐mura technique, which uses a color camera to capture white images, has a better compensation effect for color class mura, and can shorten the demura process time.
P‐9.4: Aerial Reflection Screen Using Soapy Water or Thin Films for Aero Signage Which is Floating in the Air and Enables to Make Images Invisible from Back
Authors: Sakamoto Kunio , Arakawa Mitsuki
Published: June 2024

A stereoscopic imaging or holography is a useful technology for a 3D display. These 3D imaging technologies can reconstruct floating volumetric spatial images fly off a displaying screen or a hologram. However a floating and popping up area of reconstructing 3D images is narrow, and the area is restricted between viewing positions and the display or hologram. If you want to make the lengths of popping ups fly off the displaying or holographic screen long, it is necessary to prepare a gigantic displaying unit with the large screen. But such an argument is nonsense even if we can realize such a stupid idea with costing a huge amount of money. To solve these problems, the authors have been starting researches for developing optical unit systems composed of virtual lenses, mirrors or diffusing screens which are virtually arranged and floating in the air. In this paper, the authors describe an aerial reflection screen using soapy water or thin films for aero signage which is floating in the air and enables to make images invisible from back.
P‐9.6: One Anti‐Radiation and Thermal Insulation Display System Design Scheme for Special Aviation Application
Authors: Liu Gang , Gu Jin , Zhao Xuekun , Huang Wei , Hu Haochuan
Published: June 2024

In the field of special aviation, due to the extreme operating environment, the radiation and thermal insulation performance of display devices are particularly important. If the heat source ( or radiation source ) is not effectively isolated, radiation will enter the interior of display devices, causing an increase in temperature which thereby accelerates product aging, affects performance and reduces service life. This paper proposes a design scheme for a LCD display system with anti‐radiation and thermal insulation performance. The scheme is mainly based on low radiation glass using vacuum magnetron sputtering technology. One 3G (G+G+G) structured capacitive touch screen was then processed to play an important role in this system. In addition, heat source absorption materials and heat conduction channels are designed inside the display module to maintain low level of thermal efficiency and uniformity. The temperature experiment was conducted on the prototype by using built‐in temperature sensor s . The test results showed that the scheme can effectively resist thermal radiation and maintain the temperature uniformity of the LCD module. This solution provides important technical support for the use of special touch LCD displays in extreme radiation environments.
P‐9.8: Design Method of LCoS Projection System Based on Multiplexing of Imaging and Illumination Optical Paths
Authors: Wu Zeyuan , Wang Ximeng , Yang Tong , Cheng Dewen
Published: June 2024

In this paper, we deduce and analyze the relationship between the back working distance and the design difficulty of the telecentric and reverse‐telephoto system in detail, and propose an innovative design idea for the LCoS projection system to solve this limitation. By employing optical path multiplexing in the imaging and illumination systems, the back working distance is reduced, leading to improved imaging performance and reduced system volume. Furthermore, a novel illumination system design method utilizing an independent eccentric microlens array is proposed for the new system configuration. This method achieves comparable illuminating quality with fewer elements and a smaller overall size compared to conventional approaches.
P‐9.9: A Dual Collapse Transformer for Low‐light Image Enhancement
Authors: Lai Fangwei , Lin Jianpu
Published: June 2024

Low‐light image enhancement (LLIE) aims to recover high‐ quality images from low‐quality images acquired in dimly illuminated scenes. However, deep learning algorithms often struggle with uneven exposure and obscured texture features. To address these obstacles, we propose a simple but novel Transformer structure for LLIE, called Double Collapse Transformer (DCTFormer), which has the advantage of modeling non‐local self‐attention and capturing long‐range dependencies easily. The core of DCTFormer is multiple CT blocks composed of pixel‐level spaces and channel self‐attention, which can effectively aggregate features in both the space and channel dimensions. Furthermore, we design the Local Processing Unit (LPU) and an Inverted Residual Feed‐Forward Module (IRFFN) to further enhance the model's ability to learn effective features from current local information. DCTFormer adopts a high‐resolution preservation mechanism overall and gradually integrates deep features to achieve intra‐block feature aggregation. Experimental results on existing benchmark datasets demonstrate the superiority of the proposed DCTFormer.
P‐9.15: A Novel Over Drive Technique in OLED Driver IC for Mobile Phone
Authors: Wang Yonggang , Tan Zhongqi , Wang Yijun , Qu Kongning
Published: June 2024

A novel over drive (OD) method is proposed to improve the response time of OLED for mobile applications. By utilizing line segment detection and matching, the proposed method achieves improved display quality with reduced hardware requirements. This paper details the implementation of the proposed OD technique and presents experimental results demonstrating its effectiveness.
P‐9.16: 4K LCD projection display drive system
Authors: Zhao Tianyue , Yu Chao , Li Xianzhen , Chen Shuo , Jiang Xingqun , Cheng Xinyi , Zhang Feng , Guan Enhui , Gou Jianzhou , Wan Zhongkui
Published: June 2024

In recent years, the rapid development of the domestic projection industry, the projector industry will usher in more development opportunities, 4K LCD projection technology has formed the LCD projection full link self‐research design and manufacturing capabilities, It includes the industry's first 4K LCD optical machine, LCD projection display panel, self‐designed display motherboard and reliable ODM machine manufacturing capabilities, giving 4K LCD projectors a richer built‐in ultra HD keystone correction technology, the solution uses external hard decoding dedicated processor, ultra‐low latency and does not occupy the GPU soft decoding resources of SoC in the traditional solution. The GPU processing power of the SoC can be fully released. And support edge‐blending image quality adjustment. The unique image fusion technology can achieve a seamless visual experience and perfect picture quality improvement when multiple projectors are used together, creating a high‐quality UHD projection audio‐visual experience for users. .
P‐11.3: Splicing Seam Simulation Analysis of Glass‐based Micro LED Splicing Screen
Authors: zhang Yunyuan , Zhou Wenqi , Qian Haochen , Liang Zhixuan , Chen Zemin , Huo Sitao , Wu Tianyi
Published: June 2024

This paper mainly studied the splicing seam structure of the splicing screen, analyzed the key factors of the invisible splicing seam: the thickness of the transparent encapsulated layer, the slope length of the edge of the transparent encapsulated layer, and the length of the side encapsulated layer covering the transparent encapsulated layer. Optical simulations were built to analyze the influence of three factors on the visible degree of splicing seam. The simulation results can provide references for the actual production of splicing Micro LED display products.
P‐11.4: Research on Electroless Nickel Immersion Gold for Glass‐Based Direct Display MLED Products with High Copper Area
Authors: Hu Haifeng , Zeng Ting , Liu Huan , Zhang Renwei , Xu Zouming
Published: June 2024

This paper proposed the principle of the plating lack occurrence in MLED product in electroless nickel immersion gold (ENIG) process and solved the risk of film cracking during ENIG by optimizing the stress and thickness of BP process related films to avoid plating lack problem.
P‐11.6: Minimal efficiency degradation and elevated radiometric power density of Ultraviolet‐A micro‐LED with homoepitaxial structure
Authors: Liu Yibo , Wang Guobin , Feng Feng , Li Zichun , Liu Zhaoyong , Xu Ke , Kwok Hoi Sing , Liu Zhaojun
Published: June 2024

As display technology continues to advance, UVA micro‐LEDs are becoming increasingly important in a variety of display and beyond‐display applications. In this study, we investigate the optoelectronic characteristics of UVA micro‐LEDs based on a homogeneously epitaxial structure on freestanding gallium nitride (GaN) substrates. The device exhibits a central wavelength of 390 nm, positioned at the overlap of UVA and visible light spectra. It demonstrates an impressively low ideality factor of 1.49 at 2.86 V and a series resistance of 9.88 Ω beyond 3 V. Optically, our device shows virtually no wavelength shift across a wide current density range of 0.1‐1000 A/cm2 , indicating exceptional optical stability and color accuracy. The emitted light is typical purple, reaching an expansive color gamut of 115.3% of Rec. 2020. Furthermore, the GaN‐on‐GaN structure, with its superior crystal structure and heat dissipation properties, results in a very low droop ratio in EQE. This ensures sustained high‐ power output at high current densities, showcasing great potential in applications such as 3D printing, maskless photolithography, and fluorescence tagging.
P‐11.10: Design and performance simulation study of optoelectronic co‐modulated Full GaN LET
Authors: Su Wenjuan , Chen Chao , Lin Junchen , Zou Zhenyou , Weng Shuchen , Sun Jie , Yan Qun , Zhou Xiongtu , Wu Chaoxing , Zhang Yongai
Published: June 2024

Modern society is the development stage of informationization and intelligence, and display is the key factor to realize information exchange and intelligence. Among the many current displays, Micro light‐emitting diode (µLED) display is used as a disruptive next‐generation display. Based on the same GaN material and process platform, we propose the vertical integrated device, where Indium Gallium Nitride/Gallium Nitride (InGaN/GaN) based µLED and GaN bipolar junction transistors (BJT) monolithically integrated vertically on a single GaN chip. The ultraviolet optoelectronic characteristics of µLED on BJT (LET) devices were simulated by using Silvaco TCAD software. By optimizing the size and concentration of the epitaxy layer, the optimized integrated device is obtained with high current gain and strong response to UV light. The LET can be used as both receiver and emitter, which is regulated by changing the light input power or base voltage. This device can be driven by the base voltage and UV light alone, which is a multifunctional integrated device for light emitting, detecting, sensing, driving and regulating.
P‐11.15: Debut Display of Quantum Dots as on‐chip Photoluminescent Downconverters in LED
Authors: Su Yukai , Wang Zhichun , Hu Baozhong , Zhou Jun , Lin Jiali , Mao Yanhong , Yu Jianxing , Wu Hongjian , Zheng Bin , Wang Zuqiang , Wang Zunwei , Ren Zhanpeng , Wang Wenjun
Published: June 2024

Colloidal quantum dots (QD), the material discovered and fostered by laureates of Nobel Prize in Chemistry at 2023, exhibit impressive color purity and light conversion efficiency, are one of the most promising luminescent candidates in wide color gamut display application. Although the QD‐based color conversion techniques are gaining momentum in display industry, integration of QD into LED as on‐chip form still remain to be realized. The allocation of QD layer adjacent to the GaN blue LED light source are considered as the most viable, convenient, and efficient arrangement of adopting QD into photoluminescent scenarios. However, the extremely harsh working conditions QD endured in LED pose immense challenge and barrier to be surmounted. Herein, through bandgap engineering and overgrowth of silica‐aluminum oxide on QD, for the first time, we demonstrate mass‐producible LED chips integrated with QD as photoluminescent color converters via traditional dispensing process. Compared to conventional β‐sialon phosphors, the LED device incorporated with QD show comparable luminous efficacy and reach a wider benchmark of 105.1% NTSC and 98.5% DCI‐P3 color gamut. In addition, our devices exhibit decent lifetime under both working and storage conditions. Typically, while deployed under 60 °C and 90% relative humidity, our 2604 chip charged with a 20 mA working current maintains CIE 1931 color shift within ± 0.015 and luminosity reduction less than 10% after 1000 h continuous run.
P‐12.3: Management of Domain Distribution by Employing Dual Spacers for Efficient Blue Quasi‐2D Perovskite Light‐Emitting Diodes
Authors: Zhang Yongqi , Zhang Zhiqing , Li Guijun
Published: June 2024

Quasi‐2D perovskites featuring with natural multiple quantum‐well structure are promising for achieving highly efficient blue light‐emitting diodes. The undesired domain distribution of quasi‐2D perovskites usually results in inefficient energy cascade and thereby inferior device performance. Here, we regular the domain distribution by incorporating propylamine hydrobromide (PABr) and n‐butylamine hydrobromide (BABr) into pristine perovskites to serve as dual spacers with phenylethylamine hydrobromide (PEABr), respectively. The modified perovskite films show narrower domain distribution and improved optical properties. We further fabricate the perovskite light‐emitting diodes (PeLEDs) based on the modified films. The best devices achieve a maximum external quantum efficiency (EQE) of 2.6%, which is 2.3‐fold to that of control devices. These results may provide a practical method to prepare highly efficient blue PeLEDs.
P‐13.5: Front Light Module for Reflective LCDs
Authors: Li Xiangjun , Li Kejing , Lv Guoqiang , Wang Zi , Feng Qibin
Published: June 2024

With the requirements of green development, reflective LCDs are gaining more and more applications. When reflective LCDs are used in dark environment, the display luminance cannot meet the requirement that make front light modules necessary. As the fact that front light module does not have optical films as used in backlight module, the light guide plate is directly observed by human eyes, which makes the performance of the light guide plate have profound influence on the final display. This paper firstly establishes a simulation model of the front light module. The spherical and conical dots are taken as examples to explore the influence of dot shape and parameter changes on the display performance. A kind of analysis and evaluation method of the front light module by comprehensively considering the factors of luminance, uniformity and stray light is put forward in the paper. The simulation results show that in the case of R=25μm, the spherical dots have higher comprehensive evaluation parameters at R:H=3:1, and the conical dots have higher comprehensive evaluation parameters at R:H=1:1. The analysis and evaluation method proposed in this paper can effectively guide the development of front light guides, shorten the development time and reduce the development risk.