Liquid crystal display having degree of twist and thickness for

Details Liquid crystal display having degree of twist and thickness for Liquid crystal display having degree of twist and thickness for

1986-09-17

1987-10-06

Corbin, John K.

350341, 350346, G02F 113

Patent

active

046978844

ABSTRACT:
A liquid crystal display based on the bistability effect, wherein the distance between the support plates is smaller than 10 .mu.m and the total twist of the liquid crystal is between 180.degree. and 360.degree., preferably about 270.degree.. Over the entire viewing area of the display, randomly distributed spacers are provided. Because of these measures, the range of the bistable action is so narrowed that the display can be driven with operating voltages outside this range, using conventional multiplexing techniques. A high degree of multiplexing with short switching times and excellent contrast is obtained. The range of viewing angles is very large and independent of the direction of illumination.

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Nara et al., "Multiplexing for the Guest--Host Mode Using a Nematic Cholestric Mixture With Long Pitch", J. Appl. Phys., 49(7), Jul. 1978, pp. 4277-4279.
Japanese Publ. 60-73525, published Apr. 25, 1985 (Hitachi 3).
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British Application 82-18821, filed Jun. 29, 1982; published Jan. 25, 1984 (Raynes).
Japanese Publication 57-133438, published Aug. 18, 1982 (Hitachi 1).
Japanese Publication 60-5011, published Mar. 20, 1985 (Hitachi 2).

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