15 February 2017 Fast in-plane switching of nematic liquid crystals by two-dimensional confinement with virtual walls
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Abstract
We introduce a method for achieving a short response time in homogeneously aligned liquid crystal cells by twodimensional confinement of LCs with virtual walls. When an electric field is applied to in-plane switching (IPS) and fringe-field switching (FFS) cells with interdigitated electrodes parallel to the LC alignment direction, virtual walls are built so that the switching speed can be increased several-fold. We also introduce an interdigitated pixel electrode structure with alternating tilts for a much wider viewing angle by aligning the LCs without a pretilt. In addition to a short response time and wide viewing angle, this device allows a much larger deviation of the LC alignment direction which is essential for mass production. Moreover, LCs with negative dielectric anisotropy can be used to minimize the transmittance decrease.
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Tae-Hoon Choi, Jae-Hyeon Woo, Yeongyu Choi, Seung-Won Oh, Tae-Hoon Yoon, "Fast in-plane switching of nematic liquid crystals by two-dimensional confinement with virtual walls", Proc. SPIE 10125, Emerging Liquid Crystal Technologies XII, 1012512 (15 February 2017); doi: 10.1117/12.2253709; https://doi.org/10.1117/12.2253709
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