Characterization of Bistable Hybrid-Twisted Nematic Liquid Crystal Mode by Means of Renormalized Transmission Spectroscopic Ellipsometry
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概要
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We report on how to determine asymmetrical director distribution throughout a liquid crystal layer such as a bistable hybrid-twisted nematic (BHTN) liquid crystal device by means of renormalized transmission spectroscopic ellipsometry. The advantage of the plural oblique incidence spectroscopic ellipsometry (POISE) is that the azimuthal angle as well as the tilt angle with a relatively high zenithal angle can be determined simultaneously without using a special cell with a coupling prizm. It was demonstrated that five device parameters, namely, cell gap, pretilt angles of upper and lower surfaces, twist angle of the director alignment, and azimuthal angle of the entrance liquid crystal director, can be determined uniquely. It is experimentally confirmed that each bistable state has an opposite twist sense and the twist angle difference between two stable states is approximately 180°.
- 2011-05-25
著者
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Kimura Munehiro
Department Of Electrical Engineering Faculty Of Engineering Nagaoka University Of Technology
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Akahane Tadashi
Deparment Of Electrical Engineering Faculty Of Engineering The Technological University Of Nagaoka
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Takahashi Ryouhei
Department Of Advanced Sciences Graduate University For Advanced Studies
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Takahashi Ryouhei
Department of Information and Communications Engineering, Kogakuin University, Hachioji, Tokyo 192-0015, Japan
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Goda Kazuya
Department of Electrical Engineering, Faculty of Engineering, Nagaoka University of Technology, 1603-1 Kamitomiokamachi, Nagaoka, Niigata 940-2188, Japan
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Takahashi Taiju
Department of Electric Engineering and Electronics, Graduate School of Engineering, Kogakuin University, 2665-1 Nakano-cho, Hachioji, Tokyo 192-0015, Japan
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Takahashi Taiju
Department of Information and Communications Engineering, Kogakuin University, Hachioji, Tokyo 192-0015, Japan
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Kimura Munehiro
Department of Electrical Engineering, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
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Toko Yasuo
Research & Development Laboratory, Stanley Electric Co., Ltd., Yokohama 225-0014, Japan
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Toko Yasuo
Research & Development Laboratory, Stanley Electric Co., Ltd., Yokohama 225-0014, Japan
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Goda Kazuya
Department of Electrical Engineering, Faculty of Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan
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Goda Kazuya
Department of Electrical Engineering, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
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