40.3: One FMM Solution for Achieving Active‐matrix OLED with 413ppi Real Pixel Density

Lee, Meng‐Ting; Shen, Shengchun; Weng, Zai‐Xien; Fu, Jing‐Jie; Chen, Chih-Lei; Chuang, Ching‐Sang; Lin, Yu-Shen

doi:10.1002/j.2168-0159.2014.tb00150.x

Cited by 7 publications

(1 citation statement)

References 2 publications

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“…We found it is possible to remain good contrast even without polarizer by attaching a high transparency color filter. For micro-cavity OLEDs, low reflectivity is experienced inside the device around the emission peak [4][5]. At the same time, color filter only allows transmission of a small range of light spectrum around emission peak while absorbing all others.…”

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confidence: 99%

64.4L: Late‐News Paper: Symmetric Panel Stacking Design for Achieving 3mm Rolling Radius in Plastic‐based AMOLED Display

Lee

Wang

Chan

et al. 2015

Symp Digest of Tech Papers

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A 5" plastic-based AMOLED panel with optimal structure and optical design was fabricated. The panel is designed to coincide the OLED/TFT layer with the neutral plane and limit the largest strain of the outmost part to be less than 1%. Its performance remained prominent after repeated rolled at 3mm radius. Author KeywordsFlexible; rollable; foldable; AMOLED; plastic; neutal plane; symmetric panel stack Objective and BackgroundThe advancement of thin, light and flexible displays has been receiving great attention over the past decades. Due to high temperature requirement during the fabrication process, most of flexible panels demonstrated were fabricated on plastic substrates such as polyimide and PEN, etc. In recent years, we have also successfully demonstrated our capability to produce plastic-based EPD and AMOLED displays with fixed curve and down to certain bending conditions [1][2]. In addition to thinner feature compared to EPD, AMOLED's, intrinsic property including self-emission ability and high color production range as well as fast response time allows easy video viewing, providing a very wide range of its application possibilities in the near future. The plastic-based AMOLED panels have been commercialized on smartphones; however, the fixed curve appearance is far from satisfying customers' desire for a truly flexible device. Based on the marketing research, demand of truly flexible panels become desirous with rapid requirement of hand-on electronics like smartphones, tablets and wearable devices…etc.Currently, the commercial fixed-curve smartphones or watches were made of top-emission AMOLED combined with a layer of circular polarizer (CPL). The most common types of CPL is mainly composed of stretched PVA and retardation films with the overall thickness usually larger 140m. Therefore, the mechanical property of a CPL such as minimum bending radius is large and its rolling feasibility is limited. Meanwhile, the light efficiency is reduced to less than 50% and light leaking phenomena is found while panel is bent to curve. Therefore, we propose a new structure-symmetrical panel stack (SPS)-that allows us to produce a much thinner, softer plastic-based AMOLED panel without the employment of CPL in this study.Unlike the previous report which demonstrated multi-foldable display with AMOLED [3], plastic substrates are adopted on both sides in this work. Color Filter (CF) part is fabricated using a transparent plastic substrate and AMOLED part is fabricated on the high-temperature-resistance plastic substrate. The thickness and young's modules of each layer is carefully designed to achieve the most optimized mechanical properties. In addition, optical performance comparable to conventional AMOLED is obtained by employing full color RGB with anti-reflection layer (ARL) designed on the CF side. Because the SPS structure provides optimal mechanical properties, the proposed structure is expected to have little difficulty of achieving large-scale production in the future. Panel structure design and fabricat...

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confidence: 99%

64.4L: Late‐News Paper: Symmetric Panel Stacking Design for Achieving 3mm Rolling Radius in Plastic‐based AMOLED Display

Lee

Wang

Chan

et al. 2015

Symp Digest of Tech Papers

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74-2: Collimated Flux Deposition Technology for RGB SBS OLED Displays

Kawato

Inoue

Kobayashi

et al. 2016

SID Symposium Digest of Technical Papers

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We have developed a novel deposition technology that makes possible to pattern RGB SBS with high resolution onto large substrate without the mask contact. This technology is combination of evaporation flux collimation technique and scanning substrate technique above small mask, and called as Collimated Flux Deposition(CFD) Technology. Using this technology, we built 326ppi RGB Side-by-side display.

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