30.1: A New Drive Scheme for Cholesteric Reflective Displays Under Active Matrix Addressing

A novel drive scheme for reflective cholesteric active matrix displays is proposed. This method is composed of two stages, a fast resetting phase which drives the cholesteric to the homeotropic state and a determining phase where different voltages are applied in order to get different gray levels o...

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Published in:SID International Symposium Digest of technical papers 2011-06, Vol.42 (1), p.392-395
Main Authors: Zola, Rafael S., Yang, Young-Cheol, Yang, Deng-Ke, Chen, Heng-Yin, Hsu, Chien-Chih, Chen, Chih-Jen, Liang, Chao-Chiun, Cheng, Kung-Lung
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Language:English
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active matrix
Cholesteric reflective liquid crystals
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description A novel drive scheme for reflective cholesteric active matrix displays is proposed. This method is composed of two stages, a fast resetting phase which drives the cholesteric to the homeotropic state and a determining phase where different voltages are applied in order to get different gray levels of reflectance. When the determining voltage is low, a bright high reflective planar state is achieved while when the voltage is high, a dark focal conic state is formed. We experimentally demonstrated that the drive scheme works well for video ratio operation.
doi_str_mv 10.1889/1.3621333
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subjects active matrix
Cholesteric reflective liquid crystals
title 30.1: A New Drive Scheme for Cholesteric Reflective Displays Under Active Matrix Addressing
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