1979-08-06
1981-04-28
Bauer, Edward S.
350344, 350336, 350339R, G02F 1137
Patent
active
042641497
ABSTRACT:
In a liquid crystal matrix display device in which the bistability effect of a cholesteric liquid crystal is used, the number of lines to be driven is increased by providing the electrodes (5) on grooves (3) provided in the supporting plates (1,2). The electrodes (5) partly overlap the part of a supporting plate present between two grooves. The electrode surface and the remaining surface of the supporting plates are covered by a dielectric layer (7). The grooves have a depth which is equal to half the desired thickness of the liquid crystal layer. Herewith a uniform thickness of the liquid crystal layer is also obtained.
REFERENCES:
patent: 3787110 (1974-01-01), Berreman et al.
patent: 4097121 (1978-06-01), Tauer
patent: 4105288 (1978-08-01), Geffcken et al.
Greubel "Bistability Behavior of Texture in Cholesteric Liquid Crystals in an Electric Field," Applied Physics Letters, vol. 25, Jul. 1, 1974, pp. 5-7.
de Zwart Maarten
Lathouwers Theodorus W.
Bauer Edward S.
Briody Thomas A.
Mayer Robert T.
Miller Paul R.
U.S. Philips Corporation
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