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Analysis of electro‐optical properties of polymer‐stabilized OCB and the application to TFT‐LCDs
Author(s) -
Kizu Yuko,
Hasegawa Ray,
Amemiya Isao,
Uchikoga Shuichi,
Wakemoto Hirofumi
Publication year - 2009
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/jsid17.8.647
Subject(s) - materials science , polymer , monomer , anchoring , contrast ratio , liquid crystal display , electric field , high contrast , thin film transistor , polymer network , optoelectronics , optics , composite material , layer (electronics) , physics , structural engineering , quantum mechanics , engineering
— A 9‐in. full‐color polymer‐stabilized OCB TFT‐LCD with stable bend alignment in the absence of an electric field was developed. The condition of the polymer stabilization, the characteristics of UV‐curable monomers, and their influence on the configurations of the polymer network in the cell were studied. Possible models of the configuration were proposed and their relationship to the electro‐optical properties was analyzed using a novel simulation method considering the distribution of anchoring effects from both alignment surfaces and the polymer network. It was suggested that a good performance such as high contrast ratio and fast response could be expected in the polymer network originating from newly developed monomers composed of multifunctional LC acrylates due to a relatively weak‐anchoring effect and presumably its localization near the alignment surfaces. By using the newly developed monomers under the optimized polymer‐stabilizing process, a high contrast ratio of 250:1 and fast response nearly equal to that of a conventional OCB cell were achieved.