Multicolor liquid crystal display with a dead front

Details Multicolor liquid crystal display with a dead front Multicolor liquid crystal display with a dead front

1983-03-29

1985-03-26

Corbin, John K.

350349, G02F 1133

Patent

active

045069565

ABSTRACT:
A multicolor display which comprises a high contrast liquid crystal device, light source and a luminance balanced color mask. The liquid crystal device is the transmissive, twisted nematic type having high extinction ratio polarizers on the input and output sides and functions as a light shutter for the display. The liquid crystal material has a dichroic dye admixed therein to prevent buildup of the contrast limiting orthogonal mode electric vector of polarized light. The color mask contains different colored patches with gray surround about them, and each colored patch is luminance balanced in order that each different colored data presented are of substantially equal brightness. during the off-state there is no light bleed through so that the display presents a uniformly dark state or dead front.

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U.S. patent application Ser. No. 420,963 to John W. Daughton, filed Sep. 21, 1982.

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