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Proceedings Paper

Fast switching of a nematic liquid crystal cell with neither alignment materials nor alignment process
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Paper Abstract

We propose a method for fast switching of nematic liquid crystals with neither alignment materials nor alignment process. A three-terminal electrode structure is used to apply in-plane and vertical electric fields to randomly-aligned liquid crystals. A vertical field is applied to align liquid crystals vertically for the dark state, whereas an in-plane field is applied to align liquid crystals homogeneously for the bright state. We obtained the turn-on time of 1.2 ms and turn-off time of 0.5 ms in the three-terminal electrode structure with neither alignment materials nor alignment process. However, three-terminal electrode structure with neither alignment material nor alignment process shows low transmittance. For higher transmittance, we mixed reactive mesogen and nano-particles with anisotropic molecular shape to liquid crystals. As a result, we obtained a transmittance similar to the conventional fringe field switching mode and achieved the total response time of less than 3 ms.

Paper Details

Date Published: 5 March 2013
PDF: 6 pages
Proc. SPIE 8642, Emerging Liquid Crystal Technologies VIII, 86420O (5 March 2013); doi: 10.1117/12.2001974
Show Author Affiliations
Jung-Wook Kim, Pusan National Univ. (Korea, Republic of)
Dong Han Song, Pusan National Univ. (Korea, Republic of)
Ki-Han Kim, Pusan National Univ. (Korea, Republic of)
Tae-Hoon Yoon, Pusan National Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 8642:
Emerging Liquid Crystal Technologies VIII
Liang-Chy Chien; Dick J. Broer; Vladimir Chigrinov; Tae-Hoon Yoon, Editor(s)

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