Threshold property of a nematic liquid crystal cell with two grating surface substrates
Ye Wen-Jiang(叶文江)a)†, Xing Hong-Yu(邢红玉)a), Yang Guo-Chen(杨国琛)a), and Yuan Meng-Yao(苑梦尧)b)
aSchool of Sciences, Hebei University of Technology, Tianjin 300401, China; bCollege of Science, Beijing Institute of Technology, Beijing 100081, China
Abstract A grating surface can drive the liquid crystal molecules to orientate along the direction parallel or vertical to the projected plane of the grating surface. The nematic liquid crystal (NLC) cell manufactured with two pre-treated grating surface substrates may realize the vertical display, parallel display and twist display. In this paper, the threshold property of this NLC cell is investigated systematically. With the Frank elastic theory and the equivalent anchoring energy formula of grating surface substrate, the analytic expressions of the threshold voltage related to three displays are obtained, which are dependent on their geometrical parameters such as amplitude $\delta$ and pitch $\lambda$ of the grating surface substrate. For a certain anchoring strength, the threshold voltage increases or decreases with the increase of the value $\delta/\lambda$ of the different displays.
Received: 13 May 2008
Revised: 08 September 2008
Accepted manuscript online:
PACS:
61.30.-v
(Liquid crystals)
Fund: Project supported by the Key
Subject Construction Project of Hebei Province University of China
and the National Natural Science Foundation of China (Grant Nos
10704022 and 60736042).
Cite this article:
Ye Wen-Jiang(叶文江), Xing Hong-Yu(邢红玉), Yang Guo-Chen(杨国琛), and Yuan Meng-Yao(苑梦尧) Threshold property of a nematic liquid crystal cell with two grating surface substrates 2009 Chin. Phys. B 18 238
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