1984-06-29
1987-01-06
Corbin, John K.
350341, 350350R, G02F 113
Patent
active
046342290
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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Amstutz Hermann
Heimgartner Dieter
Kaufmann Meinolph
Scheffer Terry J.
BBC Brown Boveri & Company Limited
Corbin John K.
Gallivan Richard F.
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