Electro-optical display device

Details Electro-optical display device Electro-optical display device

1980-02-11

1983-11-08

Punter, William H.

350345, 350352, 350393, G02F 1135, G02F 103

Patent

active

044138857

ABSTRACT:
An electro-optical display device which comprises a twisted nematic liquid crystal layer and a photo-conducting layer. Two crossed electrode assemblies allow the liquid crystal to be made transparent at the points to be displayed. The light which passes at these points makes the photo-conductor conducting which applies the whole of the voltage to the liquid crystal and gives greater rapidity of inscription and a memory effect.

REFERENCES:
patent: 3687535 (1972-08-01), Heurtley
patent: 3705310 (1972-12-01), Wild
patent: 3744879 (1973-07-01), Beard et al.
patent: 3829684 (1974-08-01), Assouline et al.
patent: 3989356 (1976-11-01), Altman
patent: 4051465 (1977-09-01), Brody
Meitzler et al., "Image Storage and Display Devices Using Fine-Grain, Ferroelectric Ceramics", Bell System Tech. Jr., 7, 8-1970, pp. 953-966.
Fleisher et al., "Radiation Controlled Radiation Gate", IBM Tech. Disc. Bull. 8-1963, pp. 73-74.

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