Cell isolation in bistable nematic liquid crystal cells

Details Cell isolation in bistable nematic liquid crystal cells Cell isolation in bistable nematic liquid crystal cells

1981-04-08

1983-08-23

Corbin, John K.

350340, 350341, G02F 113

Patent

active

044000600

ABSTRACT:
In order to prevent drift between the two stable states in the bulk of the liquid crystal material, a specific cell isolation region formed from the same liquid crystal material is required. This cell isolation is provided in one embodiment by a uniformly tilted liquid crystal alignment. The surface of the substrates between which the liquid crystal material is disposed is treated to provide the uniform tilt in regions which surround the bistable volumes of liquid crystal material.

REFERENCES:
patent: 3914020 (1975-10-01), Helfrich
patent: 4030997 (1977-06-01), Miller et al.
patent: 4333708 (1982-06-01), Boyd et al.
Cheng, J. et al., "Switching Characteristics and Threshold Properties of Electrically-Switched Nematic Liquid Crystal Bistable Configuration Devices", 1980 Biennial Display Research Conference of the Institute for Electronics and Electrical Engineers, (Oct. 1980), pp. 180-182.
Boyd, G. D., et al., "Liquid-Crystal Orientational Bistability and Nematic Storage Effects", Applied Physics Letters, vol. 36, No. 7, (Apr. 1, 1980), pp. 556-558.
Thurston, R. N. et al., "Mechanically Bistable Liquid-Crystal Display Structures", Institute of Electrical & Electronics Engineers Transactions on Electron Devices, vol. ED-27, No. 11, (Nov. 1980), pp. 2069-2080.
Porte, G., "Surface Disclination Lines Observed in Nematic Liquid Crystals When the Surfaces Induce Homogeneously Tilted Alignment", Le Journal de Physique, vol. 38, No. 5, (May 1977), pp. 509-517.
Porte, G., "Tilted Alignment of MBBA Induced by Short-Chain Surfactants", Le Journal de Physique, vol. 37, No. 10, (Oct. 1976), pp. 1245-1252.

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