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Proceedings Paper

Reflective display based on biphotonic effect-induced phase transition in dye-doped cholesteric liquid crystals
Author(s): Andy Y.-G. Fuh; San-Yi Huang; Yi-Shin Chen; Hung-Chang Jau; Ming-Shian Li; Jui-Hsiang Liu; Po-Chih Yang
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Paper Abstract

This work studies the biphotonic effect in samples that are cholesteric liquid crystals (CLCs) doped with azo-C5. The experimental results show that the photo-isomerization of azo-C5 not only changes the clearing point of the sample, but also shifts the reflection band that is associated with the planar texture. Additionally, azo dye-doped CLCs (DDCLCs) have bi-stable or tri-stable states, as determined by the ambient temperature. Photo-switching between these bi-stable/tristable states is systematically studied. The result indicates that photo-addressing one of these states (planar, focal conic, and isotropic states) using a low- or high-intensity Ar+ laser beam is feasible. The results thus obtained are used to fabricate a photo-rewritable DDCLC display.

Paper Details

Date Published: 12 February 2010
PDF: 7 pages
Proc. SPIE 7618, Emerging Liquid Crystal Technologies V, 76180Z (12 February 2010); doi: 10.1117/12.837426
Show Author Affiliations
Andy Y.-G. Fuh, National Cheng Kung Univ. (Taiwan)
San-Yi Huang, National Cheng Kung Univ. (Taiwan)
Yi-Shin Chen, National Cheng Kung Univ. (Taiwan)
Hung-Chang Jau, National Cheng Kung Univ. (Taiwan)
Ming-Shian Li, National Cheng Kung Univ. (Taiwan)
Jui-Hsiang Liu, National Cheng Kung Univ. (Taiwan)
Po-Chih Yang, Chaoyang Univ. of Technology (Taiwan)


Published in SPIE Proceedings Vol. 7618:
Emerging Liquid Crystal Technologies V
Liang-Chy Chien, Editor(s)

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