Bistable reflective cholesteric liquid crystal display with pixelated colors

J. Cho; U. Mueller; F. Vicentini; Y. Lin; Liang-Chy Chien

doi:10.1117/12.467460

14 May 2002 Bistable reflective cholesteric liquid crystal display with pixelated colors

J. Cho, U. Mueller, F. Vicentini, Y. Lin, Liang-Chy Chien

Proceedings Volume 4658, Liquid Crystal Materials, Devices, and Applications VIII; (2002) https://doi.org/10.1117/12.467460
Event: Electronic Imaging, 2002, San Jose, California, United States

Abstract

We report the fabrication of a bistable, reflective cholesteric liquid crystal display (CLCD) with pixelated colors. The bistable color CLCD is prepared, instead of using stacked color panels, by the formation of polymer barrier walls at inter-pixel areas and color tuning with a tunable chiral material (TCM), whose chirality can be rendered and reduced by exposing to various amount of UV light at a selected wavelength. The polymer barrier walls are formed at the inter-pixel areas by a photopolymerization-induced phase separation via a photomask. Some of the blue color pixels are selectively changed to reflect the green or red color by exposing the panel to various amount of UV light with the assistance of a set of photomasks. The electro-optical study of a CLCD with pixilated colors reveal that the bistable switching behavior is retained with variation in switching voltages depending on the color of cholesteric pixels.

Citation Download Citation

J. Cho, U. Mueller, F. Vicentini, Y. Lin, and Liang-Chy Chien "Bistable reflective cholesteric liquid crystal display with pixelated colors", Proc. SPIE 4658, Liquid Crystal Materials, Devices, and Applications VIII, (14 May 2002); https://doi.org/10.1117/12.467460

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