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Proceedings Paper

Fast gray-to-gray switching of a hybrid-aligned liquid crystal cell
Author(s): Tae-Hoon Choi; Jung-Wook Kim; Tae-Hoon Yoon
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Paper Abstract

We demonstrate fast gray-to-gray (GTG) switching of a hybrid-aligned liquid crystal cell by applying both vertical and inplane electric fields to liquid crystals (LCs) using a four-terminal electrode structure. The LCs are switched to the bright state through downward tilting and twist deformation initiated by applying an in-plane electric field, whereas they are switched back to the initial dark state through optically hidden relaxation initiated by applying a vertical electric field for a short duration. The top electrode in the proposed device is grounded, which requires a much higher voltage to be applied for in-plane rotation of LCs. Thus, ultrafast turn-on switching of the device is achieved, whereas the turn-off switching of the proposed device is independent of the elastic constants and the viscosity of the LCs so that fast turn-off switching can be achieved. We experimentally obtained a total response time of 0.75 ms. Furthermore, fast GTG response within 3 ms could be achieved.

Paper Details

Date Published: 11 March 2015
PDF: 7 pages
Proc. SPIE 9384, Emerging Liquid Crystal Technologies X, 938416 (11 March 2015); doi: 10.1117/12.2076542
Show Author Affiliations
Tae-Hoon Choi, Pusan National Univ. (Korea, Republic of)
Jung-Wook Kim, Pusan National Univ. (Korea, Republic of)
Tae-Hoon Yoon, Pusan National Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 9384:
Emerging Liquid Crystal Technologies X
Liang-Chy Chien; Harry J. Coles; Hirotsugu Kikuchi; Ivan I. Smalyukh, Editor(s)

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