Normally white reflective twisted nematic mode for silicon-chip-based light valves

Shoichi Hirota; Makoto Tsumura; Hideki Nakagawa; Toshio Miyazawa; Iwao Takemoto

doi:10.1117/12.343859

26 March 1999 Normally white reflective twisted nematic mode for silicon-chip-based light valves

Shoichi Hirota, Makoto Tsumura, Hideki Nakagawa, Toshio Miyazawa, Iwao Takemoto

Proceedings Volume 3635, Liquid Crystal Materials, Devices, and Applications VII; (1999) https://doi.org/10.1117/12.343859
Event: Electronic Imaging '99, 1999, San Jose, CA, United States

Abstract

Crystalline silicon-chip-based reflective light valves are suitable for realizing high definition and bright liquid crystal projectors. We have developed an XGA silicon-chip- based light valve with a diagonal display area of 1 inch. A normally white reflective twisted nematic mode is selected for the valve. An optimum condition of the mode is analytically solved by the Jones matrix method. This mode is suitable for a narrow cell gap and a fast response time can be expected. This mode also has a stable contrast ratio even with temperature and/or cell gap fluctuation. In addition, the driving voltage of this mode is low and it has good chromaticity with small retardation. The cell gap of the light valve is 2 micrometers . The cell gap support is made using spacer posts formed on the silicon chip with a photo- definable resin. The response time is 12 ms including both rise and fall times. The contrast ratio is more than 400 at 5 Vrms.

Citation Download Citation

Shoichi Hirota, Makoto Tsumura, Hideki Nakagawa, Toshio Miyazawa, and Iwao Takemoto "Normally white reflective twisted nematic mode for silicon-chip-based light valves", Proc. SPIE 3635, Liquid Crystal Materials, Devices, and Applications VII, (26 March 1999); https://doi.org/10.1117/12.343859

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