Interference color compensation double layered twisted nematic d

Details Interference color compensation double layered twisted nematic d Interference color compensation double layered twisted nematic d

1981-12-03

1984-04-17

Corbin, John K.

350347E, 350347R, G02F 1133, G02F 1137

Patent

active

044430655

ABSTRACT:
A double-layered twisted nematic liquid crystal display device which comprises a double layered structure including first and second layers of liquid crystal, the molecules of said liquid crystal having their longitudinal axes which are twisted, the direction of twist in the first layer being different from that in the second layer and wherein the longitudinal axes of the liquid crystal molecules in each of the first and second layers are perpendicular to each other, an electrical power supply means for applying a voltage to one of the first and second layers for controlling the orientation of the molecules of the liquid crystal in the first layer, the other of said first and second layers serving as a compensator which compensates for interference coloring, and a polarizing means for visibly enhancing the orientation of the molecules of the liquid crystal in the first layer when the voltage is applied thereto.

REFERENCES:
patent: 4099855 (1978-07-01), Wisbey et al.
patent: 4231639 (1980-11-01), Banda
patent: 4375317 (1983-03-01), Funada
Aviram et al., "Multicolor Display", IBM Technical Disclosure, vol. 15, No. 8, Jan. 1973.
Bleha et al., "9.1: The Use of the Hybrid Field Effect Mode Liquid Crystal Light Value with Visible Spectrum Projected Light", Conference 1977, SID International Symposium (Digest of Technical Papers), Boston, Mass. (Apr. 19-21, 1977).
Meyerhofer, "Optical Transmission of Liquid-Crystal Field-Effect Cells", Journal of Applied Physics, vol. 48, No. 3, American Institute of Physics, Mar. 1977.

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