Threshold property of a nematic liquid crystal cell with two grating surface substrates
Yuan Meng-Yaoa, Ye Wen-Jiangb, Xing Hong-Yub, Yang Guo-Chenb
a College of Science, Beijing Institute of Technology,
Beijing 100081, China; b School of Sciences, Hebei University of Technology, Tianjin 300401, 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 δ and pitch λ of the grating surface
substrate. For a certain anchoring strength, the threshold voltage
increases or decreases with the increase of the value
δ/λ of the different displays.
Received: 13 May 2008
Revised: 08 September 2008
Published: 20 January 2009
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, Xing Hong-Yu, Yang Guo-Chen, Yuan Meng-Yao Threshold property of a nematic liquid crystal cell with two grating surface substrates 2009 Chin. Phys. B 18 0238
