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Crystals 2017, 7(7), 201; doi:10.3390/cryst7070201

Fast Turn-Off Switching of Vertically-Aligned Negative Liquid Crystals by Fine Patterning of Pixel Electrodes

Department of Electronics Engineering, Pusan National University, Busan 46241, Korea
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Academic Editor: Wei Lee
Received: 25 May 2017 / Revised: 29 June 2017 / Accepted: 30 June 2017 / Published: 3 July 2017
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Abstract

We investigated the two-dimensional (2D) confinement effect on the switching of vertically-aligned negative liquid crystals (LCs) by an electric field applied between the top and bottom patterned electrodes. When an electric field is applied to a patterned vertical alignment (PVA) cell, virtual walls form in the middle of the gaps between and at the center of the patterned electrodes. These virtual walls formed in a PVA cell results in the turn-off time being dependent on the pitch of the patterned electrodes as well as the cell gap. We found that a short response time can be achieved by the fine patterning of pixel electrodes with little decrease in the transmittance. The obtained numerical results agree well with the model based on the 2D confinement effect of LCs. View Full-Text
Keywords: liquid crystals; liquid crystal device; fast switching; 2D confinement liquid crystals; liquid crystal device; fast switching; 2D confinement
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Choi, Y.; Choi, T.-H.; Woo, J.-H.; Jeon, B.-G.; Yoon, T.-H. Fast Turn-Off Switching of Vertically-Aligned Negative Liquid Crystals by Fine Patterning of Pixel Electrodes. Crystals 2017, 7, 201.

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