Voltage polarity switching means for cholesteric liquid crystal

Details Voltage polarity switching means for cholesteric liquid crystal Voltage polarity switching means for cholesteric liquid crystal

1981-06-05

1984-04-03

Corbin, John K.

350332, 350346, G02F 1137, G02F 1135, G02F 1133

Patent

active

044404735

ABSTRACT:
A display device particularly adapted for use with a microfilm reader, in which an illuminating light source need be activated only in an initial reading stage. A first transparent electrode, a liquid crystal layer, a semiconductor layer and a second transparent electrode are stacked together in the stated order. A voltage is applied between the first and second transparent electrodes which is switched in a polarity between an initial reading mode and a display mode.

REFERENCES:
patent: 3592527 (1969-11-01), Conners
patent: 3705059 (1972-12-01), Kun
patent: 3758207 (1973-09-01), Letzer
patent: 4156558 (1979-05-01), Grumet
Haas et al., "Simple Real Time Light Valves", Appl. Phys Lett., vol. 29, No. 6, American Institute of Physics, Sep. 15, 1976.

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