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P‐135: Optically Addressable Liquid Crystal Displays in Polymer‐Dispersed Cholesteric Liquid Crystals
Author(s) -
Cheng KoTing,
Li JauHam,
Fuh Andy YingGuey
Publication year - 2009
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 - 10.1889/1.3256633
Subject(s) - dopant , materials science , liquid crystal , monomer , polymer , cholesteric liquid crystal , impurity , planar , doping , polymerization , liquid crystal display , homeotropic alignment , optoelectronics , optics , chemical engineering , composite material , organic chemistry , chemistry , computer graphics (images) , physics , computer science , engineering
This work presents optically addressable liquid crystal displays (LCDs) in polymer‐dispersed cholesteric liquid crystals (PDCLCs). A UV‐polymerized polymer film can destroy the surface‐treated alignment layer, and change the cholesterics textures from planar to focal conic in PDCLCs. The clearing temperature can be changed by doping with monomeric and chiral dopant due to the impurity effect. Additionally, the clearing temperatures of LCs in cured and uncured regions are different because of the quantity of the monomers, which can increase the impurity. Consequently, the presented textures in these two regions can be switched by controlling sample's temperature, and can be achieved several interesting devices.