Fast switching and luminance-controlled fringe-field switching liquid crystal device for vehicle display |
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| Authors: | Jeong Hwan Yoon Eo Jin Seo Seung Jae Lee Young Jin Lim Hoon Sub Shin Seong Min Song |
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| Institution: | 1. Department of Materials Science and Engineering, Yonsei University, Seoul, Korea;2. Applied Materials Institute for BIN Convergence, Department of BIN Convergence Technology and Department of Polymer Nano Science and Technology, Chonbuk National University, Jeonju, Jeonbuk, Korea |
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| Abstract: | ABSTRACTLiquid crystal displays (LCDs) for vehicle displays should exhibit a fast response time in wide temperature range and wide-viewing angle in horizontal and downward directions without grey-scale inversion but limited brightness in the upward direction because the display images can be reproduced in the front window glass of a vehicle, affecting driver’s front visibility. Currently, fringe-field switching (FFS) liquid crystal device is widely commercialised for high resolution and wide-viewing-angle LCD; however, it needs to improve response times and limit the display brightness in the upward direction. As a solution, we propose a homogeneously aligned liquid crystal device in which liquid crystal director does tilt as well as twist deformation in a confined area by both vertical- and fringe-electric fields, exhibiting about two times faster decay response time than that of conventional FFS mode with suppressed luminance in the upward direction. The proposed liquid crystal device can be applied to LCDs for vehicle displays. |
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| Keywords: | Fringe-field switching vehicle display fast response time viewing angle |
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