11 March 2015 Fast gray-to-gray switching of a hybrid-aligned liquid crystal cell
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Proceedings Volume 9384, Emerging Liquid Crystal Technologies X; 938416 (2015) https://doi.org/10.1117/12.2076542
Event: SPIE OPTO, 2015, San Francisco, California, United States
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.
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Tae-Hoon Choi, Tae-Hoon Choi, Jung-Wook Kim, Jung-Wook Kim, Tae-Hoon Yoon, Tae-Hoon Yoon, "Fast gray-to-gray switching of a hybrid-aligned liquid crystal cell", Proc. SPIE 9384, Emerging Liquid Crystal Technologies X, 938416 (11 March 2015); doi: 10.1117/12.2076542; https://doi.org/10.1117/12.2076542
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