14.1: PS Design and Chirography Study of Pressure Sensing and Bistable Cholesteric Liquid Crystal Writing Board

Writing board with cholesteric liquid crystal (CLC) will open a chalk‐free and eye‐protected education thanks to its pressure sensing, light reflected, rewritable, bistable, selective and locally erasable characteristics. Here, photo spacer (PS) design and chirography property of CLC writing board w...

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Bibliographic Details
Published in:SID International Symposium Digest of technical papers 2021-08, Vol.52 (S2), p.192-195
Main Authors: Wu, Xiaojuan, Wang, Jiaxing, Zhao, Yu, Ge, Yang, Wang, Jian, Yu, Hongjun, Wang, Xiuliang, Che, Chuncheng, Xue, Hailin
Format: Article
Language:English
Subjects:
Area
Bistable
Chalk
Chirography
Cholesteric liquid crystal
Cholesteric liquid crystals
Handwriting
Light reflection
Polymer network
Pressure sensing
PS design
Writing
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Summary:Writing board with cholesteric liquid crystal (CLC) will open a chalk‐free and eye‐protected education thanks to its pressure sensing, light reflected, rewritable, bistable, selective and locally erasable characteristics. Here, photo spacer (PS) design and chirography property of CLC writing board were studied. To obtain certain width and uniform writing chirography, PS is designed orderly and located in pixel area without metal line. It was found that with increasing the PS supporting area and decreasing the height of PS (PSH), the width of chirography decreases. This phenomenon was resulted from the mechanism of pressure transmission through PS and CLCs. In addition, with the same supporting area the smaller the PS density, the finer the handwriting. Finally, the central value of the chirography width is controlled at 3 mm in 63.8 inch product.
ISSN:0097-966X
2168-0159
DOI:10.1002/sdtp.15063