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US 4,068,926 AGranted
Liquid crystal display device for displaying colored patterns
AssigneeJapan Suncrux Co., Ltd.
InventorsKenji Nakamura, Iwao Seno
Life of this patent
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Abstract
A twisted nematic type color liquid crystal display device comprises a twisted nematic liquid crystal cell sandwiched between a pair of linear polarizers. One of the linear polarizers is achromatic and the other is colored. The colored linear polarizer should preferably be doubled to increase contrast of the patterns displayed thereby.
Claims6
A liquid crystal display device of twisted nematic structure which displays colored patterns comprising in combination:
- a pair of spaced apart oppositely disposed transparent substrates bearing on the inside surfaces thereof a patterned electrode layer,
- a layer of nematic liquid crystal material having positive dielectric anisotropy sandwiched between said pair of transparent substrates,
- means for effecting a twisted nematic structure in the layer of nematic liquid crystal material,
- an achromatic linear polarizer disposed outside and adjacent one of said pair of transparent substrates,
- a first colored linear polarizer disposed outside and adjacent the other of said pair of transparent substrates, and
- a second colored polarizer superposed with the first colored linear polarizer with the polarizing plane thereof oriented in parallel to that of the latter.
3 more elements
Dependencies are inferred from the claim text.