Pleochroic color display device

Details Pleochroic color display device Pleochroic color display device

1980-02-28

1983-08-02

Evans, F. L.

350339F, G02F 113

Patent

active

043962513

ABSTRACT:
A pleochroic color display device is provided which comprises a layer of guest-host type liquid crystal sandwiched between two transparent electrodes for driving the liquid crystal, the guest-host liquid crystal containing a dichroic dye as guest material, and a color filter disposed in front or rear of the layer of the guest-host type liquid crystal. High contrast pleochroic color displays can be obtained by selecting a blackish dye as the dichroic dye. Dichroic displays other than white ones can be produced by the use of a single liquid crystal cell and a single color filter (with one color).

REFERENCES:
patent: 3840695 (1974-10-01), Fischer
patent: 3900248 (1975-08-01), Nagasaki
patent: 4029392 (1977-06-01), Moriyama et al.
patent: 4035060 (1977-07-01), Tsunoda et al.
patent: 4257682 (1981-03-01), Suzuki et al.
patent: 4294524 (1981-10-01), Stolov

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