Liquid crystal device with a positive display

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350341, 350349, G02F 1133

Patent

active

046245316

ABSTRACT:
A display device for effecting a display of a colored image against a colorless background which has a mixture of a liquid crystal having, disposed between a pair of glass substrates, a positive dielectric anisotropy to serve as a host material and a dichroic dye to serve as a guest material, each of which substrates having a transparent electrode of a required pattern adherently formed on its inner surface, characterized in that at least a portion of said pattern of the transparent electrode on each substrate is subjected to a treatment for causing orientation of the molecules of the liquid crystal in a direction parallel to the plane of the substrate when no voltage is applied, and the remaining portions of said pattern and the inner surface of said substrate to be in contact with the liquid crystal are subjected to a treatment for causing orientation of the molecules of the liquid crystal in a direction perpendicular to the plane of the substrate when no voltage is applied.

REFERENCES:
patent: 3647280 (1972-03-01), Klein et al.
patent: 4128313 (1978-12-01), Cole et al.
patent: 4181563 (1980-01-01), Miyaka et al.
patent: 4212011 (1978-08-01), Waldron
patent: 4277144 (1981-07-01), Saurer et al.
patent: 4297004 (1981-10-01), Nishimura et al.

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