Liquid crystal display device

Details Liquid crystal display device Liquid crystal display device

1974-12-16

1978-01-17

Bauer, Edward S.

350150, G02F 113

Patent

active

040689255

ABSTRACT:
A liquid crystal cell includes a nematic liquid crystal of negative dielectric anisotropy is disposed between a pair of transparent electrode substrates. The electrode substrates have on their inner surfaces small grooves formed parallel to each other, the grooves on one surface being perpendicular to those on the other surface. In the absence of a voltage applied between the substrates, the long axes of the liquid crystal molecules are perpendicular to the inner surfaces of the electrode substrates. The addition of a small amount of a cholesteric liquid crystal material markedly improves the contrast of the display.

REFERENCES:
patent: 3703331 (1972-11-01), Goldmacher et al.
patent: 3749474 (1973-07-01), Cartwell
patent: 3881806 (1975-05-01), Suzuki
patent: 3914022 (1975-10-01), Kashnow

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