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12‐2: 3D Pixel Configurations for Optical Out‐Coupling of OLED Displays — Part II: Experimental Validation
Author(s) -
Chen Chung-Chia,
Lin Wan-Yu,
Xu Lisong,
Yu Gang,
Kwak B. Leo,
Visser Robert Jan,
Chen Yi-Ting,
Wen Sheng-Wen,
Lee Wei-Kai,
Liao Po-Hsiang,
Lee Min-Chia,
Chen Yi-Jiun,
Su Guo-Dong,
Lin Hoang Yan,
Wu Chung-Chih
Publication year - 2019
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.12876
Subject(s) - oled , pixel , scalability , optoelectronics , materials science , computer science , coupling (piping) , optics , layer (electronics) , artificial intelligence , physics , nanotechnology , database , metallurgy
The light extraction efficiency of OLED is crucial for display performance and other issues such as power consumption, lifetime, and image sticking issue. Although lots of effort was adopted, the existing technologies are either too difficult/expensive to be utilized or only suitable for bottom‐emitting OLEDs. Here we proposed a novel 3D pixel configuration to have effective light out‐coupling for top‐emitting OLEDs. Comprehensive multi‐scale optical simulation indicates several‐fold of extraction enhancement and excellent viewing characteristics are simultaneously achievable by extending the bottom reflective electrode to bank slope of the pixel definition layer (PDL) and selectively filling the bank opening (concave area) with high‐index filler to form the optically reflective concave structure. This scheme is scalable and wavelength insensitive, and thus can be generally applied to all red, green, and blue pixel OLEDs in high‐resolution full‐color displays. In this paper, the experiment results of validation were reported with discussion.