Liquid crystal color display device

Details Liquid crystal color display device Liquid crystal color display device

1985-11-18

1988-09-20

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340702, 350345, G09G 336

Patent

active

047728850

ABSTRACT:
A color display device has a liquid crystal unit for passing therethrough electromagnetic radiation dependent on image information. The color display device also has a light source including electroluminescent materials or fluorescent materials. The electroluminescent materials and the fluorescent materials are essentially the same, but have different light-emitting mechanisms, i.e., electroluminescence and fluorescence. The light source with the electroluminescent materials is used singly or in combination with a color filter and the liquid cystal unit. The light source with the fluorescent materials is combined with a color filter and the liquid crystal unit. When the light source with the fluorescent materials is used, the amounts of the fluorescent materials for emitting lights in red, green, and blue, the light-emitting efficiencies of the fluorescent materials, and the transmissivities of the color filter for the lights in red, green, and blue are determined to meet certain conditions.

REFERENCES:
patent: 4167307 (1979-09-01), Crikler et al.
patent: 4410887 (1983-10-01), Stolov et al.
patent: 4470666 (1984-09-01), Eick
patent: 4578672 (1986-03-01), Oota et al.
patent: 4580877 (1986-04-01), Washo
patent: 4600274 (1986-07-01), Morozumi
patent: 4642619 (1987-02-01), Togashi
patent: 4678285 (1987-07-01), Ohata et al.
W. R. Young--"Combination Reflective/Transmissive Liquid Crystal Display"--IBM Technical Disclosure Bulletin--vol. 15, No. 8--Jan. 1973--pp. 2435-2436.

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