Liquid crystal display unit which is back-lit with colored light

Details Liquid crystal display unit which is back-lit with colored light Liquid crystal display unit which is back-lit with colored light

1990-05-10

1992-07-07

Hille, Rolf

Cutlery

359 54, 359 66, 359 73, 359 85, 340784, G02F 113

Patent

active

051287820

ABSTRACT:
A liquid crystal display unit includes a liquid crystal display panel having a matrix or pixels which act as light valves. The red component of an image is displayed on the panel, and a red light is flashed on the back of the panel. Then the green component of the image is displayed and a green light is flashed, and the blue component is displayed and a blue light is flashed. A plurality of light sources, each having a red light emitter, a green light emitter, and a blue light emitter, may be employed at a close distance to an active-matrix LCD panel if compensation is provided for the differences in light intensity at different positions on the back of the panel. A passive-matrix LCD panel may be used if a flash of light is emitted each time a row electrode of the panel is strobed. Preferably a plurality of light sources is used, and after one row electrode is strobed and its associated light source is fired, the next row electrode to be strobed is located adjacent a different light source. As a result, a row of pixels is exposed to an intense burst of light at the optimum moment and a relatively mild burst of light as the row of pixels is turning OFF.

REFERENCES:
patent: 4715687 (1987-12-01), Glass et al.
patent: 4793691 (1988-12-01), Enomoto et al.
patent: 4803399 (1989-02-01), Ogawa et al.
patent: 4882617 (1989-11-01), Vriens
patent: 4907862 (1990-03-01), Suntola
patent: 4936659 (1990-06-01), Anderson et al.
patent: 4973137 (1990-11-01), Kozaki
"Backlighting for Liquid Crystal Display", IBM Technical Disclosure Bulletin, vol. 29, No. 11, Apr. 1987.
McGraw-Hill Encyclopedia of Science & Technology, 6th ed., vol. 6 (1987) pp. 212-217.
McGraw-Hill Encyclopedia of Science & Technology, 6th ed., vol. 10 (1987) pp. 109-113.
McGraw-Hill Encyclopedia of Science & Technology, 6th ed., vol. 17 (1987) pp. 482-485.
J. Wilson et al., "Optoelectronics, An Introduction", 2nd ed. (1989) pp. 144-152.
Donald G. Fink et al., "Electronics Engineers' Handbook", 3rd ed. (1989) pp. (6-36), (11-9 and 11-10), (20-102 to 20-103), and (23-75 to 23-76).
T. D. Towers, "Electronics and the Photographer", Focal Press (1976) pp. 209-211.
Cannon, Inc. Leaflet for the "Spudlite 244T" flash unit (1982), 2 pages.

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