bluuebunny/crossref_metadata_2025 huggingface dataset:
85‐1: Ultrahigh‐Resolution Corrugated Silicon Nitride Masks for Direct Patterning of OLED Microdisplays
Authors: Dong Shou-Cheng , Yang Jiye , Deng Sunbin , Tam Bryan Siu Ting , Yao Jingwen , Tang Ching W.
Published: August 2023

Corrugated silicon nitride masks (SiNMs) of 2000 ppi are developed to reduce the shadowing effect in direct patterning of high‐resolution, RGB side‐by‐side OLED microdisplays. Periodic corrugations in the free‐standing silicon nitride membrane elevate the through‐apertures and reduce the gap between the mask and the substrate.
85‐4: Plasma‐Polymerized HMDSO for Thin Film Encapsulation of Micro‐OLED
Authors: Wu Wenhao , Li Wenhui , Nominanda Helinda , Chen Jerry R. , Zhao Lai , Choi Soo Young
Published: August 2023

Plasma‐Polymerized Hexamethyldisiloxane (pp‐HMDSO) was developed as buffer layer by plasma enhanced chemical vapor deposition (PECVD) together with SiN barrier layers to form thin film encapsulation (TFE) stack that can reduce the whole TFE thickness to less than 1µm for an ultra‐high resolution Micro‐OLED application. The pp‐HMDSO film featured excellent particle coverage was close to 100% transmittance in the whole visible light region and was nearly stress free.
86‐5: Late‐News Paper: Green‐ and Red‐Emitting Perovskite Nanocrystal Inks for Color Conversion Display Technologies
Authors: Ohashi Yoshihiro , Yoshimasa Yutaka , Teshima Takayuki , Kobayashi Motokazu , Wakimoto Takeo
Published: August 2023

Perovskite nanocrystals (PeNCs) are promising color converters due to their high blue light absorption and narrow‐band emission. This paper reports on the bright and stable PeNCs inks for patterned green/red color conversion pixels. Inks designed to stabilize PeNCs have a shelf life of more than one month, and UV‐cured PeNCs films exhibit high color conversion efficiency and practical durability to blue light and heat. Our PeNCs inks are capable of sufficient color conversion even at high pixel resolutions and will be a viable solution for full‐color OLED and micro‐LED displays.
87‐3: Invited Paper: High Ambient Contrast LCDs with Advanced Reflectionless Technology
Authors: Su Jenn-Jia , Chen Chien-Chi , Lin Shang-Chiang , Kao Wang-Shuo , Hsu Ya-Ling , Liao Cheng-Hsien
Published: August 2023

Ambient contrast ratio (ACR) has been promoted recently since this index fits most user environment. In this paper, we will focus on the solutions to improve ACR and its viewing angle as well. Different anti reflection technologies are compared. With our Advanced Reflectionless Technology (A.R.T.) adopted in LCD, both the ACR indexes and user viewing experience are greatly improved.
87‐5: AM Mini‐LED Based on LTPS TFT Backplane with over 5000 Dimming Zones and High Driving Bits
Authors: Yang Yong , Chen Yunni , Xiong Haijun , Cao Haiming , Liu Fancheng , Zha Guowei , Yuan Jianfeng
Published: August 2023

LCD with Mini‐LED backlight performs high brightness and high contrast ratio. In this paper novel Mini‐LED based on LTPS TFT backplane is proposed for LCD backlight with over 5000 dimming zones and excellent image quality. Moreover, based on special driving circuit, 12‐14 driving bits, that is 4096‐16384 gray level, is achieved, which can improve local contrast ratio of the image. Compared to PM Mini‐LED, AM Mini‐LED shows superior performance on high dimming zone design, fewer LED drivers and improvement of image quality.
88‐4: Late‐News Paper: Electrochromic Devices with Metallo‐Supramolecular Polymers
Authors: Higuchii Masayoshi
Published: August 2023

Metallo‐supramolecular polymers (MSPs) were synthesized by 1:1 complexation of metal ions with multitopic organic ligands. MSPs showed excellent electrochromic (EC) properties, which were triggered by the electrochemical redox of the metal ions. In addition, the color of MSPs was tunable by changing the combination of the metal and the ligand. EC devices (ECDs) with MSPs were successfully fabricated by the combination with an MSP layer, an electrolyte layer, and a counter material layer. In this presentation, recent progress on ECDs with MSPs will be introduced.
P‐109: C/N Fusion Controlled Emission Strategy for Narrow‐Emitting High‐Efficiency Organic Light‐Emitting Diodes
Authors: Patil Vilas Venunath , Lim Junseop , Lee Jun Yeob
Published: August 2023

Two narrow emitting emitters were developed via a carbon/nitrogen (C/N) fusion strategy. The fusion‐induced rigid structures induced an MR effect similar to the boron frameworks. Both compounds offer narrow emission, very small Stocks shift, and high photoluminescence quantum yield. The fluorescence devices fabricated using m‐FLDID offer maximum efficiency (EQEmax) of above 5%, pure violet emission at 407 nm, and FWHM of 17 nm. Whereas the p‐ FLDID‐based thermally activated delayed fluorescence (TADF) devices showed EQEmax of above 25%, deep‐blue emission at 452 nm, and FWHM of 23 nm.
P‐112: Improvement of White OLED Performance by Optical Enhancement Structure
Authors: Quan Wei , You Juanjuan , Shen Yongqi , Wang Linlin , Bo Bin , Yu Donghui , Bian Menghua , Shih Huai-Ting , Yu Jianwei
Published: August 2023

According to the demand of image quality improvement, the color gamut standard has been adjusted from DCI‐P3 to BT.2020. At present, the color gamut of some QD products can reach 80%~90%, while that of white OLED products is only about 75%. In this paper, the composite film with SiO2/SiNX distributed Bragg resonator (DBR) structure is designed and studied. The results show that the film can form a strong microcavity structure with simultaneous enhancement of RGB for white OLED devices, which overcomes the bottleneck that the strong microcavity structure can't be used in white OLED devices. It can effectively improve the performance of OLED devices, and at the same time, it has the water vapor barrier effect. It can realize the integration of multiple effects such as high color gamut, low power consumption and reliability improvement in product applications. Using the refractive index difference of SiO2/SiNx thin film, the DBR structure was fabricated by carefully designing the thickness. Based on this DBR structure, a white OLED device is fabricated. The external quantum efficiency of the device is improved, and the color gamut is up to 85% ( BT.2020), which is 11.2% higher than that of the device without DBR structure. Compared with the device without DBR structure, it has reached the QD display level, and the white light power consumption is reduced by 34.1%, HDR power consumption is reduced by 20.3%, and the overall performance is greatly improved. It provides technical support for products with high color gamut, low power consumption and long life.
P‐116: Elucidation of OLED Degradation Mechanism Using Mass Spectrometry and Theoretical Analysis
Authors: Sawada Keisuke , Shirakura Daichi , Shibamori Takahiro , Miyamoto Takashi , Uejima Motoyuki , Sato Tohru , Sakanoue Kei
Published: August 2023

We elucidated the degradation mechanism of OLEDs using mass spectrometry and theoretical analysis. GCIB‐TOF‐SIMS and MS/MS revealed that the carbazole group adduct to mCBP was formed in the emission layer of the degraded OLED. The generation process of the degradation product was clarified using quantum chemical calculations and vibronic coupling density analysis.
P‐125: A Novel Method to Increase the Transmittance of Full Display with Camera
Authors: Xu Chuan X. , Yao Qi , He Wei , Shu Shi , Yuan Guang C.
Published: August 2023

A novel PI substrate structure was developed for FDC to improve the transmittance, that is, the first layer of double‐layer PI is patterned. The crystalline state of polysilicon and evaporation shadow of this structure have proved that the structure is feasible. This structure can avoid the warping of single‐layer PI, and achieve the same transmittance as single‐layer PI.
P‐126: An Introduction to GGRB Virtual Pixel Technology
Authors: Lu-jiang Huangfu , Wen-xiu Zhu , Hua-ling Yang , Shan-shan Bai , Hui Zhao , Shi-ming Shi
Published: August 2023

The constructions of the GGRB virtual pixel and the effect on the display performance are introduced by comparing with that of the Diamond RGBG virtual pixel, a typical virtual pixel technology applied to active matrix organic light‐emitting diode (AMOLED) display. Because of the characteristic structure of GGRB sub‐ pixel arrangement, the occurrence of perceptible artificial color discontinuity is reduced in the GGRB virtual pixel display. The distribution uniformity of pixel luminance centroids is important for the display of pattern details. In the GGRB virtual pixel display, the distribution uniformity of pixel luminance centroids is achieved via a non‐uniformly distributed green sub‐pixel array of which the luminance profile is properly modulated by the red and blue sub‐pixels with lower spatial frequency distribution. The results of subjective evaluation and comparison suggest that the performance improvement of the GGRB virtual pixel display is consistent with the conceptual expectation. Some of the essential characteristics is superior to those of the reference technology.
P‐173: Late‐News Poster: Composite Cavity Design for Long Lifetime and Low Cost Organic Light‐Emitting Diodes Displays
Authors: Tu Qing , Gu Yu , Wang Ke , Lee Mun-jae , Wu Ming-zhou , Yan Xiao-lin
Published: August 2023

Traditional way to upgrade the stability and current efficiency performance of OLED device is seeking for new generation of electroluminescent materials. We provide a composite cavity design for longer lifetime, lower cost, and equivalent luminance by using the same materials. It consists of two first‐order red and green cavities and a second‐order blue cavity, which means different optical thickness of the RGB micro cavities. Due to the shorter distance between emitting molecules and metal electrodes, 1st order cavity obtains longer lifetime by surface plasmon coupling. A 52.7% improvement of calculated white lifetime can be accomplished with a respective 89.1% and 54.9% longer lifetime of red and green devices. 1/3 even more organic materials can be saved. Less angular luminance decay and lower working voltage are also demonstrated in the experimental part.
P‐88: Study on the correlation of Flicker Shift and PI in FFS Mode Display
Authors: Li Guanhuo , Chen Jian , Cui Yanjiao , Wei Dingqiong , Lin Wenpeng , Zhong Caijiao , Yang Xianyan
Published: August 2023

We study the flicker shift performance of PI materials with different impedances. The Vcom shift of high‐ and low‐resistance PI under the flicker picture and the white picture are tested, and the influence of light and electricity on PI was analyzed. The high resistance PI is less sensitive to light and electricity than the low resistance PI, the degree of Vcom shift is small, and the flicker shift is better than that of the low‐ resistance PI. In addition, the flicker shift of the low resistance PI can be optimized by lowering the panel voltage or the BLU brightness.
P‐89: Digital Holography Microscope with liquid crystal phase modulator
Authors: Joo Kyung-II , Lim Sungjin , Lim Ki-Dong , Lee Jin Su , Park Min-Kyu , Yoon Seon Kyu , Lee Kwang-Hoon
Published: August 2023

We proposed a DHM system with improved resolution property by using liquid crystal (LC) phase modulator. The LC phase modulator can stably control the phase modulation characteristics of the interference pattern and implements the four‐step phase shifting scheme. The proposed DHM system showed a four‐fold improvement in resolution compared to the conventional DHM with polarized camera. Finally, it was confirmed that the modulation transfer function (MTF) value was improved 2 times at the resolution target of 105 lines/mm.
P‐91: Novel dual gate pixel design with high image quality and low power consumption for LCDs
Authors: Liao Liqing , Li Hongmin , Feng Silin , Wang Lei , Xue Wei , Zang Yuansheng , Wang Sheng , Lee SeungKyu
Published: August 2023

We have developed LCDs with high image quality and low power consumption using a novel dual gate pixel structure. Compare with the traditional dual gate pixel structure, this new structure has more uniform spatial distribution of sub‐pixel polarity and data signal line, which can improve the vertical line issue and vertical crosstalk issue. Besides, the connection between a single color sub‐pixel and a single data signal line for the new pixel structure, which is better than that of the existing structure, can significantly reduce the logic power consumption by more than 60%.
P‐27: UV‐Induced Adhesion Increasable PSAs for Display Assembly
Authors: Yook Ju Young , Lee Junghyun , Kim Bokyung
Published: August 2023

Novel pressure sensitive adhesives (PSAs), exhibiting increasable adhesion are described. Two product concepts have been developed demonstrating a range of PSA adhesion properties that can be increased by up to 6000% via UV radiation, allowing for a single PSA to be utilized for pre and post manufacturing processes.
P‐28: Photocurable and Inkjet‐Printable Optically Clear Silicone‐Acrylic Hybrid Resin
Authors: Kyeong Minkyu , Lee Hojin , Yook Juyoung
Published: August 2023

Photocurable and inkjet‐printable optically clear silicone‐acrylic hybrid resins (OCR) were newly developed with suitable viscosity, good peel adhesion strength, and excellent optical stability. This material can be a promising candidate on an inkjet‐printable OCR for next generation display modules.
P‐34: Investigation of Cutting Schemes for Glass Coated with a SiNx‐SiOx Film Based on Hybrid OLED †
Authors: Yuan Fu W. , Guan Li Z. , Zhao De Y. , Feng Yu Q.
Published: August 2023

To validate the large plate cutting schemes of Hybrid OLED, we conducted experiments, and evaluated the applicability and limitations of Wheel Cutting, Bessel Laser Cutting and Laser scribing from the break rate, bending strength and processing efficiency dimensions. The conclusions provide an important experimental foundation and technical scheme for the cutting scheme of Hybrid OLED and the glass coated with a multi‐layer.
P‐149: Late‐News Poster: Effective Approach to Failure Analysis of IC‐embedded OLED Display Device
Authors: Song Hoseok , Lee Kiwon , Hong Youngmyung , Choi Jungho , Lee Yongjae
Published: August 2023

With conventional methodologies and workflow in the failure analysis (FA) of display device, the result of FA was not clear enough to identify the defect source because it had been removed or deformed during PFA work. Therefore, new methodologies and workflow were proposed to resolve the limitations of current ones. This study with actual FA works of display failures like abnormal display failure and vertical line display failure, verified that the FA of display failure at module level successfully identified the source of defectivity without its alteration during PFA work. New methodologies and workflow would contribute to clear identification of failure source so that it gives feedback into inline, followed by improvement actions.
P‐18: Development of Oxide UHD Panel LCD with High Mobility for Notebook PC
Authors: He Jiayu , Hu Hehe , Ning Ce , Li Zhengliang , Zhao Kun , Yuan Guangcai
Published: August 2023

We have developed a new oxide BCE technology with high mobility of more than 46 cm2/Vs and used it in a 13.3‐inch 144Hz oxide UHD LCD panel for a Notebook PC. Because of the low carrier concentration of the new oxide materials, the high mobility characteristics can be ensured by using single‐layer materials, and the homogeneity of the prepared short‐channel TFTs is also perfect. They also have reliability PBTS/NBTIS enough to use the application. These results indicate that a variety of backplanes are possible to be made in a single factory of Oxide.
P‐20: Research on driving technology of Hardware Super Resolution LCD
Authors: Zhang Yin-long , Liao Yan-ping , Peng Zhao-yu , Sun Zhi-hua , Li Sen-wang , Zhou Liu-gang , Liu Dong , Yao Hai-yan , Shao Xi-bin
Published: August 2023

In order to improve the refresh rate of large‐sized LCD products, a novel driving scheme calling Hardware Super Resolution technology or HSR for short is presented in the paper, which can be utilized in TV, MNT, NB, et al. The driving scheme mainly applied GOA Pre Charge compensation algorithm, odd and even frame interlaced time‐sharing charging and Smart TP. A protype driving circuit was fabricated, and various detection tests have been implemented. The results show the charging rate is obviously improved, and the refresh rate is doubled without increasing hardware resources.
P‐26: IGZO TFT‐based Micro Light‐Emitting Diode Pixel Circuit with Progressive Emission Using Pulse Width Modulation
Authors: Jung Eun Kyo , Im Hwarim , Kim Yong-Sang
Published: August 2023

IGZO TFT‐based µLED pixel circuit was proposed. We utilized PWM to improve the wavelength shifts of µLED and applied progressive emission, which easily controls the emission current and emission time for low power consumption. We demonstrated the stable operation in the proposed pixel circuit based on depletion mode IGZO TFTs.
P‐136: Simulation study on the lifetime of Rollable AMOLED Module
Authors: Gu Chunxiao , Liang Meiqiang , Wang Zhanshu , Xie Hongjun , Ding Liwei
Published: August 2023

Different materials and stacking structures of multi‐layer will be arranged and combined when AMOLED panels are in rollable form. Many problems such as residual stress of deformation recovery, peeling of multi‐layer are usually happen during dynamic process and repeat motion, which can influence module lifetime directly. In this paper, we standardize the method of rollable simulation modeling, and then analyze related equivalent strain data of different multi‐layer structure in rollable form, derive the whole lifetime mapping of single material, predict the fatigue lifetime of rollable module after using kriging fitting. At last, we find that the accuracy of lifetime prediction is more than 80% by using these ways, which can greatly improve design efficiency.
P‐144: Late‐News Poster: Evaluation for Flexible Substrates According to the Number of Rollings
Authors: Kim Seung Gyun , Yu Eun Seong , Lee Jong Mo , Moon Seung Jae , Lee Ki-Yong , Bae Byung Seong
Published: August 2023

A scratch test was performed to evaluate the substrate deformation according to the number of rolling times for the rollable display. For polyimide and thermal plastics polyurethane, the critical loads are analyzed according to the number of rolling times. As increasing the load, friction coefficients were measured during the scratch on films. The effect of substrate rolling times on plastic n and elastic deformations were evaluated.
P‐172: Late‐News Poster: Highly Stretchable OLED Panel with Sensors Embedded for Healthcare Applications
Authors: Song Jun-Kyul , Yoon Jangyeol , Kim Seongwon , Lee Jiwon , Hong Jong-Ho , Kim Yongjo
Published: August 2023

Stretchable display has become emerging technology as the next‐generation form‐factor of flexible and rollable displays. Especially, advanced form of stretchable organic light‐emitting diode (OLED) display plays an increasingly central role in wearable healthcare applications. The stretchability of OLED display platform enable conformal to the curvature of the human body. Therefore, stretchability and the pixel density remain key requirements for the development of highly stretchable OLED display. Here, we report rational structural design for highly stretchable OLED panel with biophysical sensors embedded for healthcare applications. The island and stretchable bridges enable stretchability over 20%. Moreover, stretchable temperature and strain sensors embedded in panel provide new approach toward wearable healthcare applications.
P‐102: Explainable AI Approach for MOD Outliers in FAB to MOD Process
Authors: Park Sujin , Choi Hyunho , Yim Taekyung , Kyung Yunyoung , Jin Younggil , Kim Jaewon
Published: August 2023

Display panels manufactured in the FAB process are assembled with various films and components in the module (MOD) process, and their final quality is a result of accumulated the quality of hundreds of preceding processes. Due to these limitations, it is hard to analyze the cause of MOD's outliers relevant to the FAB process and much time and money are consumed to maintain the cause process to eliminate MOD outliers. Therefore, we propose a new explainable AI (XAI) approach to detect and improve the module process's outliers by finding the correlation between FAB and MOD in this paper. The proposed approach was verified for MOD outlier cases in the real world's OLED development and manufacturing process. As a result, it confirmed 96.8% of the average accuracy for classifications. This approach presents the FAB factor that caused MOD's outliers based on the correlation between the MOD and the FAB.
P‐103: Multi Path Control System for AGV Based on Digital Twin in Display Module Process
Authors: Kim Yonggu , Lee Seungjoo , Roh Cheollae
Published: August 2023

Increasing display process complexity, Automated Guided Vehicle becomes more important and the delivery time constraint is getting shorter. The complicated process causes traffic congestion and deadlocks between AGVs. Preventing these issues, this paper suggests digital twin technology that allows AGV to choose the best route among various paths. This research validates the AGV simulation for the display plant. The result shows AGV average delivery time was shortened by 14.1% compared to the traditional algorithm. In addition, the AGV capacity rate can be reduced by 21.5% and the number of AGVs can be reduced by 10.1%.
P‐159: Display Gamma Tuning Points Reduction using Deep Learning Algorithm
Authors: Kim Sangmi , Lee Kanghee , Lee Jungyu , Kim Hyeonmin , Kim Minweun
Published: August 2023

“Gamma Tuning” is an important key technology in producing high‐quality display products. Recently, as high‐definition and high‐performance products are required, production time is also increasing proportionally as gamma tuning points increase. To overcome this problem, in this paper, we propose and validate an AI gamma tuning technique based on deep learning that tunes only minimal gamma points. As a result of the verification, gamma tuning points were reduced by 15.6% compared to traditional machine learning, and the image quality performance was equal to or higher than that of all actual gamma point tuning.
P‐175: AI‐based Multimodal Architecture for Video Anomaly Detection in Large OLED Panel Manufacturing
Authors: Jeong Euiyoung , Kim Jaewon , Roh Cheollae , Myoung Seungho , Seo Changwook
Published: August 2023

This paper proposes an AI‐based multimodal architecture for anomaly detection in a video footage of a smart carrier which is used for monitoring alignment status, grinding of rollers and vibration of a carrier for manufacturing line of OLED (Organic Light Emitting Diodes) panels. The proposed multimodal architecture has a two‐stream structure. The first stream extracts a candidate anomaly region in image frames sampled from the video by DL‐based segmentation. Thereafter, the candidate region is determined whether it is a true failure or not by comparing the region with a reference image which was previously obtained in a normal setup status. The second stream calculates a dense optical flow with sparse areas using consecutive video frames. By observing change between (n)th, reference, (n‐3)th and (n‐7)th images, it is determined with sound analysis whether the smart carrier experiences vibration during movement. The overall detection rate of three anomalies is 97%, and processing takes only 40% of total video time.
P‐54: Research On DGS Character Of Glass Based Mini LED BLU
Authors: Jia-wei Xu , Hai-wei Sun , Zong-jie Guo , Zou-ming Xu , Xin-tao Wu , Jie Wang , Ning-yu Luo , Ting-wei Han , Wen-zhuo Tang
Published: August 2023

This paper introduces the research on the elements that could lead to the DGS issue of Mini LED BLU, as well as a theoretical model built based on the research result. By performing a variety of experiments studying the relationship between several elements, this DGS issue was confirmed to be caused by electrochemical corrosion under the joint impact of water steam infiltrate and electric potential difference between metal pattern on the product. In this specific circumstance, the two necessary condition for DGS issue to happen are electric potential difference between 2 nd Cu layer pattern in LED zone and 1 st Cu layer pattern on the G‐ bus, and the water steam infiltrated from the via hole left for the LED chip soldering. The water steam infiltrated then diffuse through the 1 st Resin layer and the time cost for the water steam to reach the position where electric potential difference exists is in a direct proportion to the distance from such point to the soldering via. Moreover, the larger that electric potential difference is, the higher probability of DGS issue happening is, while the relationship between this probability and the distance mentioned previously is in an opposite way. Overall, by applying several optimization such cancelling the hedgehopping 1 st Cu pattern and adding extra inorganic insulating layer protection on the design of product, and applying an extra cathode protection design, the DGS issue was significantly resolved.
P‐55: Patterned Glass Diffuser (PGD) for Luminance Increase and with Glass Circuit Board (GCB) in a Mini‐LED Backlight
Authors: Mi Xiang-Dong , Li Donglei , Yang Tonghua , Chu Jing , Lu Kun , Sun Haiwei , Shi Lingyun , Han Songfeng , Niu Tzu-Ling , Allen Kirk R , Chen Kaihui , Yi Wei , Bao Yixing , Wang Bin , Li Ya-Bei , Cao Xiangxiang , Du Guanglei , Schreiber Horst , Krol Mark F
Published: August 2023

We report our progress on monitor‐sized, dimensionally and thermally stable mini‐LED backlights enabled by a patterned glass diffuser (PGD). One PGD based backlight, while being thinner, shows a higher luminance than a reference mini‐LED backlight. Another all‐in‐one PGD enhances a glass circuit board based mini‐LED backlight.
P‐56: An Advanced High Dynamic Range Display Technology with Power Saving Algorithm of Adaptive Real‐time Controllable Backlight
Authors: Cheng Lin , Dou Wei , Lai Ching-Hong , Wu Jia-Lian , Nam Jang-Jin , Cheng Jin-Hui , Ni En-Wei
Published: August 2023

An advanced high dynamic range (HDR) liquid crystal display (LCD) with the excellent performance was developed. The HDR Display technology can enhance the contrast ratio of pictures and reduce power consumption by utilizing adaptive controlled dynamic backlight. Improved methods about simplification of lookup tables (LUT), improvement of accuracy, and maintenance of details and chroma were studied, which make it a promising technique for displays.
P‐174: The causes and improvement of the waterfall in Mini/MicroLED Displays
Authors: Guo Xiaoying , Liu Jinfeng , Fan Junyao , Liu Sili , Kim Nate
Published: August 2023

The display product using Mini/MicroLED backlight, in the case of using the PWM dimming method, with the OC (open cell, OC) of the 4‐mask process, there will be a significant change in the horizontal light and dark band under the low gray level, which is called the waterfall phenomenon in the industry. In this paper, the causes of the waterfall phenomenon are analyzed and studied, and three methods of improving the waterfall are proposed. Experimental tests were carried out on the module of 34‐inch 1152 partition, and the display effect before and after the improvement was compared, and the effectiveness of the proposed method was verified.
P‐80: Process Optimization of High Hardness Polarizer for Touch Display
Authors: Kun Ma , Jiuhui Zhu , Ming Yang , Wei Cheng , Chao Wang , Cooper
Published: August 2023

In this article, we optimized the preparation process of Hard Coat (HC) materials, studied the influence of UV and postbake parameters on curing rate and film surface warpage, improved the warpage of the film during the curing process, and successfully prepared a high‐hardness HC film that can be applied to touch display. At the same time, by optimizing the pretreatment of the film surface, the adhesion of the Anti‐Fingerprint (AF)material on the HC surface is improved, so that the surface of HC film has no scratches after abrasion test, and the WCA is kept above 110°, which meets requirement the of touch display.
P‐83: Optimizing Water‐proofing Algorithm with Machine Learning for Wearable OLED In‐Cell Touch Panel
Authors: Huang Jun-Jie , Lin Yi-Ying , Lee Chin-Lin , Lai Chih-Chang , Chou Chun-Yi , Lin Ching-Chun
Published: August 2023

In this paper, a wearable OLED in‐cell self‐capacitive sensor using machine learning algorithm for water‐proofing is proposed.

This paper also shows the experiment and the test result. The result shows that the success rate of water‐proofing on bezel can be largely improved (from 30.7% to 77.1%) by machine learning method on the wearable device with Novatek TDDI NT38350.
P‐43: Development of 3D Crosstalk Classification Model Using Deep Learning†
Authors: Ha Young-sang , Mok Rang-kyun , Kim Beom-shik
Published: August 2023

We propose development of a 3D X‐Talk classification model using deep learning. Secure X‐Talk image data of various LFD products and classify images for each feature. After image labeling and feasibility evaluation to utilize the deep learning model as a learning image, the performance of the model was improved and the platform was developed. This requires a faster and more accurate classification model to classify X‐Talk levels in the quality inspection process for commercial LFD product production.
P‐47: A Measurement Method for Lateral Current Leakage Effect of OLED Panels
Authors: Tang Hao , Li Andrew , Xu Gang
Published: August 2023

A method is proposed to measure the lateral current leakage effect to the brightness and colors, especially at low graylevels, for OLED panels.
P‐150: A New Multitasking Demura Algorithm for Display Defect Compensation
Authors: Xu Ling , Wang Wen-li , Yi Kai-yong , KIM Nate
Published: August 2023

This paper proposes a multitasking Demura algorithm based on backlight modulation and liquid crystal voltage adjustment that significantly increase the luminance uniformity and improves the details of high gray image without saturation issues. The multitasking Demura benefit was experimentally validated in a 55‐inch splicing module display, and the experimental results show that the multitasking Demura can eliminate severe mura, increasing the module's luminance uniformity from 34%, 60% and 88% to 83%, 95% and 98% at L25, L128 and L240 gray levels.
P‐15: Vehicle High Response Intelligent Heating Control Electronic Side Mirror
Authors: Li Pengtao , Wang Chunhua , Dong Xiaoqiao , Liu Peng , Zhai Yue , Pan Qiannan , Liu Tiantian , Cui Dong , Yu Jie , Han Rui , Ma Qing , Yoon DK , Cai Site
Published: August 2023

With the improvement of vehicle market demand and technology update, the vehicle display technology has developed rapidly, and the electronic side view mirror has gradually entered the market. Electronic side view mirror has many advantages, such as wide viewing angle, applicability to bad weather, excellent night vision ability, etc. But it also has some limitations, such as slow response time and poor working performance in low temperature environment. In order to solve the above problems, this paper integrates TDDI and in cell heating and improves the response time through OD function, and detects temperature to control heating driver through integrated temperature sensor, so that the module can have ultra‐high response time under low temperature environment.
P‐63: Simple Pixel Circuit with External Compensation for High PPI Active‐Matrix MicroLED Displays Using PWM Method
Authors: Hung Chia-Che , Chiu Ching-Yung , Chen Yung-Chih , Liu Chun-Hsin
Published: August 2023

This work presents a novel pixel circuit that consists of five transistors and two capacitors for active‐matrix micro‐LED (AMμLED) displays. The proposed pixel circuit uses external compensation to compensate for variations in the low‐temperature polycrystalline‐silicon thin‐film transistor (LTPS TFT) threshold voltage and adopts pulse width modulation (PWM) to modulate the grayscale. According to the simulation results and a layout example, the proposed pixel circuit is expected to be applied in high pixels per inch (PPI) car displays in the future.
P‐67: Research of photoelectric performance GaN based green Micro‐LED †
Authors: Zhanghu Mengyuan , Liu Zhaojun
Published: August 2023

GaN‐based light‐emitting diode (LED) arrays are a promising technology in a wide range of applications. Research on temperature dependence performance is important in GaN‐ based LED. Display applications are still the focus of GaN‐ based LEDs, especially high‐definition (HD) displays. It is of great importance for HD display to researching green Micro‐LED device. we study the performance issues of 80μm green Micro‐LED devices include ideality factor at different temperatures, carrier concentration distribution, and optical properties. This research can help understand and fabrication high‐performance green Micro‐LED devices.
P‐70: Red and Green Perovskite Quantum Dot Paper for Full‐color Micro‐display
Authors: Sheng Yujia , He Jr-hau , Liu Zhaojun
Published: August 2023

The commercialization of μ‐LED displays is impeded by the persistent obstacle of full‐color representation, particularly when the pixel pitch is scaled down to below 20 µm. The utilization of quantum dots (QDs) as color converters has proven effective in mitigating this limitation. To this end, this study proposes the use of perovskite quantum dots papers (PQDPs) as color converters for μ‐LEDs, intending to achieve full‐color display functionality.
P‐74: A Novel Color‐converted Full‐color Mini‐LED Display
Authors: Sun Wenjia , Chen Zhenzhang , Li Jiao , Ma Ruoyu , Tian Chao , Gao Bo , Sun Haiwei , Chen Ming
Published: August 2023

A novel color‐converted Mini‐LED Display was reported. And with unique 3D printing technology, the high bank can be realized. Then blue chips are combining with red phosphors by using 3D printing technique to achieve a high‐quality red light without Color Filter. The color gamut can reach more than NTSC100%.
P‐161: Late‐News Poster: Non‐Toxic PEIE dual Interfacial layers for efficiency improvement in Quantum dot light‐emitting diodes
Authors: Gun-Kim  , Kim Hyo-Bin , Song Jang-Kun
Published: August 2023

Quantum Dot Light‐Emitting Diode (QD‐LED) has the disadvantage of charge imbalance due to the deep HOMO level of QD itself and layer mixing due to the solution process despite its enormous advantage of high color purity and large display manufacturing. PEIE, introduced to prevent this, uses harmful 2‐ME solvents, and was evaluated to replace them with IPA, a harmless solvent. As a result, IPA secured more than twice the EQE to resolve the charge imbalance compared to 2‐ME, and equivalent EQE to protect EML. Finally, we verify that 2‐ME could be smoothly replaced with IPA.
P‐162: Late‐News Poster: Analysis of Various solvents for Hole Transport Layer in Tandem Structure Quantum Dot Light Emitting Diode
Authors: Yoo Jae-In , Kim Hyobin , Kang Sung-Cheon , Kim Kang-hoon , Jang Jincheol , Kim Gun , Song Jang-Kun
Published: August 2023

To achieve high‐resolution display, dual color tandem quantum dot light emitting diodes (QD‐LED) could be candidate. This tandem QD‐LED's characteristics affected by interface of emission layer (EML)/hole transport layer (HTL) and thickness of electron transport layer (ETL). In this research, we analyzed various solvents for HTL and modulated ETL thickness.
P‐1: A Study on the Mechanism of Fluorination Enhanced Thermal Stability of IGZO Thin‐Film Transistors Based on a Kinetic Model of Donor‐Defects
Authors: Wang Yuqi , Jiang Wei , Xia Zhihe , Wong Man
Published: August 2023

The stability against thermal stress of thin‐film transistors based on fluorinated indium‐gallium‐zinc oxide (IGZO:F) is known to be better than that based on IGZO. The mechanism responsible for the improvement has been studied by analyzing the extracted parameters associated with a recently proposed kinetic model governing the oxidation and reduction of donor‐defects in metal‐oxide semiconductors. Compared to those in IGZO, the donor‐defects in IGZO:F are shown to be more easily oxidized but less readily reduced during a heat‐treatment.
P‐2: Narrow Bezel Gate Driver Generating Positive Pulse for AMOLED Display Using LTPO Technology with Depletion Mode Oxide TFTs
Authors: Kim Junyeong , Jang Jin
Published: August 2023

We propose a novel gate driver generating positive pulse for oxide switching TFTs in AMOLED pixel circuits using low‐temperature polycrystalline silicon and oxide (LTPO) thin‐film transistors (TFTs). The proposed gate driver circuit has only five TFTs without capacitor. The proposed circuits can operate perfectly when all oxide TFTs in the circuits have threshold voltage (VTH) of ‐3.5V, depletion mode. The circuit can be easily designed for narrow bezel due to simple structures. The one stage of the circuit was designed with the size of 50 μm × 100 μm. The fabricated circuit works well with the depletion mode oxide TFTs with VTH of ‐3.5V. The circuit operated at the pulse width of 1 μs, corresponding to operating speed of 500 kHz. The proposed gate driver can be applicable for narrow bezel AMOLED display.
P‐3: Conductive Indium‐Tin‐Zinc Oxide Formed Using an Oxygen Plasma Treatment Through a Silicon Oxide Cover Layer
Authors: Xie Xinying , Chen Kaiqi , Zhou Zhichao , Jiang Wei , Wang Yuqi , Wang Sisi , Xia Zhihe , Wong Man
Published: August 2023

Indium‐tin‐zinc oxide (ITZO) covered with a silicon oxide layer can be made conductive when subjected to an oxygen plasma treatment. The resulting resistivity is sensitive to the thickness of the cover oxide, the plasma excitation power, and the treatment time. With 280 nm of cover oxide and 10 mins of treatment, the lowest resistivity achieved is 1.2 mΩ∙cm in a plasma biased with a radio frequency excitation power of 100 W and an inductively coupled plasma excitation power of 2000 W. The treatment has been deployed to form the source/drain regions of a self‐aligned, top‐gate ITZO thin‐film transistor.
P‐5: Improved Split C–V Technique for Effective Mobility Extraction in Self‐Aligned Top‐Gate Amorphous InGaZnO TFTs with Short Channel
Authors: Zhang Yuqing , Li Jiye , Guan Yuhang , Zhang Yuhan , Yang Huan , Chan Mansun , Lu Lei , Zhang Shengdong
Published: August 2023

In this paper, we evaluate the feasibility of the split capacitance‐voltage (C–V) technique for mobility extraction in self‐aligned top‐gate (SATG) amorphous InGaZnO (a‐IGZO) thin‐film transistors (TFTs) with short channel down to 5 μm. The accuracy of the effective mobility (μeff) extraction approach is greatly enhanced by properly de‐embedding the disturbances, including channel length reduction (ΔL), inner fringing capacitance (Cif), and source/drain access resistance (RSD). The results show that the parasitic bias‐dependent RSD and Cif in the inner fringe regions of the channel account for the underestimation of μeff on short‐channel devices.
P‐11: A Novel AMOLED Pixel Circuit using Double‐Gate LTPO TFTs for Variable Refresh Rate with Low Power Consumption
Authors: LEE Wonjun , Kim Cholho , Park Haeryeong , Baek Seungin , Kim Yongjo
Published: August 2023

This paper proposes an Active Matrix Organic Light Emitting Diode (AMOLED) pixel circuit for Variable Refresh Rate (VRR) driving from 1Hz to 240Hz. The circuit is based on a double‐gate Low Temperature Polycrystalline Silicon and Oxide (LTPO) Thin Film Transistor (TFT) backplane. For low frame rate driving we used oxide TFTs as the Switching (SW) TFTs. Moreover, we applied double‐gate Low Temperature Polycrystalline Silicon (LTPS) process to the Driving (DR) TFT for compensation of the Threshold Voltage (Vth) by controlling the bottom gate bias at a high refresh rate. In this paper, operation principle and simulation results will be illustrated to demonstrate the performance of the proposed circuit.
P‐154: Late‐News Poster: High‐Performance Indium‐Gallium Oxide Thin‐Film‐Transistors via Plasma‐Enhanced Atomic‐Layer‐Deposition
Authors: Hur Jae Seok , Kim Min Jae , Yoon Seong Hun , Jeong Jae Kyeong
Published: August 2023

We report the fabrication of high‐performance indium‐gallium oxide (IGO) thin‐film transistors (TFTs) via plasma‐enhanced atomic‐layer‐deposition (PE‐ALD) process with cation composition ratio variation. With accurate control of the composition ratio, IGO(12:3) TFTs showed stable characteristics along with high field‐effect mobility (μFET) of 70.69 cm 2 /Vs. Furthermore by increasing the gallium ratio, IGO(6:3) TFTs showed extremely stable characteristics with threshold voltage (VTH) variations lower than 0.1 V in both positive bias stress (PBS) and negative bias stress (NBS) conditions.
P‐141: Late‐News Poster: Chroma Remapping Power Saving Technique for OLEDs
Authors: Jang Jieun , Chung Gunhee , Lee Wonbok , Park Jongwoong
Published: August 2023

This paper proposes a novel image processing algorithm that maintains perceivable luminance as much as possible while it significantly reduces EL power consumption of OLED based upon a well‐known Helmholtz‐Kohl effect which is one of the representative theories based on human visual system's (HVS) characteristics of recognizing higher saturation images to be brighter. Proposed method effectively resolves various image artifacts incurred by the modification of ‘saturation’ value in each pixel, by carefully analyzing various image artifacts in each of problematic cases. Experimental results show that we have achieved a score of 4.18 based upon a subjective image quality evaluation methodology (Mean Opinion Score) and an average of 15.3% of EL power consumption savings were achieved in 20 evaluation images at the same time.
P‐142: Late‐News Poster: Research on a Gamut Mapping Color Enhancement Algorithm Based on User Experience
Authors: Li Yangyun , Hua Jiachen , Zhai Dong , Song Wenwen , Zhu Shiyang
Published: August 2023

Four gamut mapping algorithms with different color style are designed and implemented in the DCI‐P3 OLED. It is found that the most popular tuning direction was "dark+pure", while "bright+gray" was the least. The keywords "comfortable", "real", "brilliant" and "lifelike" have a high explanatory power to user preferences..
P‐62: Broadband In‐Cell Polarizer Using Solution‐processed Broadband Quarter‐Wave Plate and Photo‐aligned Polarizer
Authors: Yuan Zheng-Nan , Sun Zhi-Bo , VASHCHENKO Valerii , VASHCHENKO Olena , Cheng Yuechu , HUO Yipeng , HO Jacob , CHEN Rongsheng , YEUNG Fion S. Y. , KWOK Hoi-Sing
Published: August 2023

We demonstrate a kind of in‐cell solution‐processed broadband circular polarizer made of liquid crystal polymer and a photo‐aligned polarizer on top, using the coating technique and chemical treatment. The transmittance and reflectance spectrum shows a high ambient contrast ratio (ACR) improvement for the light‐emitting display system.
Tensile Strength Prediction of Gray Cast Iron for Cylinder Head Based on Microstructure and Machine Learning
Authors: Teng Xiaoyuan , Pang Jianchao , Liu Feng , Zou Chenglu , Li Shouxin , Zhang Zhefeng
Published: August 2023

The ultimate tensile strength (UTS) of gray cast iron (GCI) can be affected by numerous parameters due to its complex microstructures. To further understand the UTS of GCI, it is necessary to evaluate the impact of various parameters. Herein, a UTS prediction method based on microstructure features and machine learning (ML) algorithms is proposed. The six regression algorithms, namely, Bayesian Ridge, Linear Regression, Elastic Net Regression, Support Vector Regression, Gradient Boosting Regressor (GBR), and Random Forest Regressor are used to develop the prediction models. The predicted results show that the GBR has the best prediction performance for the predicted UTS and the error bands within 5%. The feature importance indicates that matrix hardness has the greatest effect on the UTS in the ML models.
Influence of Ti/N Ratio on Inclusions, Microstructures, and Toughness in Heat‐Affected Zone of Shipbuilding Steel Plates with Mg Deoxidation after High Heat Input Welding
Authors: Zhang Yuqi , Zhang Yinhui , Yang Jian , Li Tingting , Chen Yanli
Published: August 2023

The inclusions, microstructures, and toughness in heat‐affected zone (HAZ) of the shipbuilding steel plates with Mg deoxidation and the different Ti/N ratios are studied after the high heat input welding of 400 kJ cm−1. With increasing the Ti/N ratio from 3.00 to 5.67, the average size of inclusions increases, the mass fraction of total TiC inclusions increase from 2.8% to 5.0%, and the average size of MgO–TiN–MnS increases from 2.82 to 5.49 μm, while the number density that can induce intragranular acicular ferrite (IAF) nucleation decreases from 87 to 62 mm−2. These changes in inclusions are detrimental to induce the IAF nucleation. The HAZ microstructures are composed of the IAFs, polygonal ferrites, and upper bainites (UBs). With increasing the Ti/N ratio, the area fraction of the IAFs decreases from 44% to 14%, and the area fraction of UBs increases from 1.8% to 9.5%. The HAZ fracture mode changes from ductile fracture to brittle fracture after the high heat input welding of 400 kJ cm−1, and the HAZ toughness decreases from 183.3 to 48.7 J at −20 °C.
Analysis and Control of the Slab Hot Ductility Behaviors Based on Nozzle Arrangement during Continuous Casting
Authors: Wang Huisheng , Zhang Jiangshan , Wang Chao , Yang Zhigang , Wu Jun , Guan Min , Liu Qing
Published: August 2023

The spray cooling efficiency is greatly influenced by the nozzle arrangement, which correlates with the water flux distribution on the blank surface in continuous casting process. Herein, the temperature‐hot ductility quantitative relation (THDR) model is established with the high‐temperature tensile test data, and the effects of nozzle arrangement on the distribution of water flux, temperature, and hot ductility are investigated. The results show that the spray distance influences the water flux in the whole spraying coverage area, while the nozzle spacing only impacts the water flux in the spray overlapping area. The distribution uniformity of the slab surface temperature gradually increases with increasing the spray distance, meanwhile, it increases first and then decreases as the nozzle spacing increases. Moreover, the hot ductility distribution is calculated using the THDR model, and the results reveal a different variation. Specifically, the sizes of the high hot ductility areas in the slab surface center and edge decrease with the spray distance increases, and the uniformity of the hot ductility distribution decreases with the increase of nozzle spacing. Combining the above research, a new strategy/approach for nozzle arrangement is proposed, which can improve the crack resistance of the slab surface.