Multicolor liquid crystal display

G - Physics – 02 – F

Patent

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Details

375/39, 314/7, 3

G02F 1/133 (2006.01) G02F 1/1335 (2006.01) G02F 1/139 (2006.01)

Patent

CA 1208750

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 bright- ness. During the off-state there is no light bleed through so that the display presents a uniformly dark state or dead front.

445805

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