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.
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