Liquid crystal display device

Details Liquid crystal display device Liquid crystal display device

1989-04-28

1990-03-20

Miller, Stanley D.

350335, 350347E, 350351, G02F 1135

Patent

active

049096060

ABSTRACT:
A liquid crystal display device and method of fabrication thereof includes a first twisted nematic liquid crystal cell and an optically anisotropic material sandwiched between two polarizers. A second twisted nematic liquid crystal cell or polymer film serves as the optically anisotropic material. The optically anisotropic material may be disposed on one or both sides of the first twisted nematic liquid crystal. The optically anisotropic material compensates for the elliptical polarization of the light passing through the liquid crystal cell so that the device transmits white light in the OFF state and appears black in the ON state.

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H. A. Tarry, "Electrically Tunable Narrowband Optical Filter", Electronics Letter, vol. II, No. 19, Sep. 18, 1975, pp. 471-472.

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