Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1991-09-27
1993-09-14
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 53, 359 73, G02F 1133
Patent
active
052454517
ABSTRACT:
A liquid crystal (LC) display method and apparatus applies respective active LC bias voltages to both a master LC cell, and a phase compensation LC cell for the master cell. The bias voltages are selected to reduce the response time of the master cell, and to establish a common multicolor dark state for that cell. With a proper selection of the bias voltages, the products of the liquid crystal thickness and birefringence for each cell are substantially equal and mutually cancel. A bias voltage is first established for one cell, and the bias voltage for the other cell is then scanned to locate the point of mutual cancellation. A range of different bias voltages are possible, and a suitable bias is selected to balance response time against the required operating voltage range. A multicolor display system using only a single light valve can be realized.
REFERENCES:
patent: 4408839 (1983-10-01), Wiener-Avnear
patent: 4466702 (1984-08-01), Wiener-Avnear et al.
patent: 4941737 (1990-07-01), Kimura
patent: 4952029 (1990-08-01), Hayashi et al.
patent: 4991941 (1991-02-01), Kalmanash
patent: 5044732 (1991-09-01), Kimura et al.
patent: 5119220 (1992-06-01), Narita et al.
Bleha et al., "Application of the Liquid Crystal Light Valve to Real time Optical Data Processings", Optical Engineering (The Journal of the Society of Photo-Optical Instrumentation Engineers, Jul./Aug. 1978, vol. 17, No. 4, pp. 371-384.
Katoh et al., "Application of Retardation Compensation; A New Highly Multiplexable Black-White Liquid Crystal display With Two Supertwisted Nematic Layers", Japanese Journal of Applied Physics, vol. 26, No. 11, Nov., 1987, pp. L17784-L1786.
S. T. Wu, "Design of a liquid crystal based tunable electrooptic filter", Journal of Applied Optics, vol. 28, No. 1, Jan. 1, 1989, pp. 48-52.
Wu Chiung-Sheng
Wu Shin-Tson
Denson-Low W. K.
Duraiswamy V. D.
Hughes Aircraft Company
Mai Huy K.
Sikes William L.
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