Liquid crystal display device with compensation layers

Details Liquid crystal display device with compensation layers Liquid crystal display device with compensation layers

1988-10-31

1990-11-27

Miller, Stanley D.

350347R, 350347E, G02F 1133

Patent

active

049731378

ABSTRACT:
A liquid crystal display device which comprises first and second electrode substrates spaced a predetermined distance from each other, a nematic liquid crystal layer added with an optically active material and having a positive dielectric anisotropy, which layer is sandwiched between the first and second electrode substrates such that the liquid crystal molecules exhibit a helical structure in which they are twisted in a predetermined twist angle in a direction across the thickness of the liquid crystal layer, a light detecting element positioned on one side of the first electrode substrate remote from the liquid crystal layer, a polarizing element positioned on one side of the second electrode substrate remote from the liquid crystal layer, and a film-like sheet having a birefringence and disposed between the light detecting element and the first electrode substrate, and/or between the polarizing element and the second electrode substrate.

REFERENCES:
patent: 4019808 (1977-04-01), Scheffer
patent: 4080046 (1978-03-01), Nishizaki
patent: 4697884 (1987-10-01), Amstutz et al.
patent: 4701028 (1987-10-01), Clerc et al.
patent: 4779960 (1988-10-01), Kozaki et al.
patent: 4844569 (1989-07-01), Wada et al.
T. J. Scheffer, "Liquid Crystal Color Displays", Nonemissive Electrooptic Displays, 1975, pp. 45-77.
J. Appl. Phys., vol. 44, No. 11, Nov., 1973, pp. 4799-4803, T. J. Scheffer.
Phase Retarder LCDS, vol. 74, pp. 163-169, P. Andrew Penz, Mol. Cryst. Liq. Cryst., 1981.

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