Liquid-crystal display device

Details Liquid-crystal display device Liquid-crystal display device

1979-12-17

1981-07-07

Bauer, Edward S.

350342, 350350S, G02F 1135

Patent

active

042771455

ABSTRACT:
In a liquid-crystal display device, a smectic liquid-crystal layer and a layer of photoconductive material are placed between two transparent plates. A voltage is applied to the photoconductor by means of electrodes while scanning the photoconductor with a writing light beam. At locations in which the resistance of the photoconductor is reduced under the action of the light beam, the heat generated causes transition of the liquid crystal to the isotropic state. The light-scattering action produced by subsequent cooling of the liquid crystal has the effect of writing the image to be displayed.

REFERENCES:
patent: 3999838 (1976-12-01), Sprokel
patent: 4150396 (1979-04-01), Hareng et al.
patent: 4196974 (1980-04-01), Hareng et al.

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