Liquid crystal display unit with a plurality of subpixels

Details Liquid crystal display unit with a plurality of subpixels Liquid crystal display unit with a plurality of subpixels

1995-05-25

1997-03-11

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

349 43, 349 85, 349144, G02F 11343, G02F 1136

Patent

active

056107390

ABSTRACT:
A liquid crystal display unit including a plurality of subpixels in each pixel provides superior gradation over a wide viewing angle, and is produced with no increase in manufacturing cost and no deterioration of desired properties (such as reduction in brightness, contrast and response). No additional manufacturing step is required since a control capacitor electrode is formed at the same time as source and drain electrodes constituting a thin-film transistor. By controlling the ratio of display area and the difference in applied voltage of the subpixels, preferable viewing angle properties are obtained. The display properties at the boundary of subpixels are improved by controlling the gap width and the direction of boundary of the subpixels, thus providing a bright display.

REFERENCES:
patent: 4840460 (1989-06-01), Bernot et al.
patent: 5126865 (1992-06-01), Sarma
patent: 5191452 (1993-03-01), Sarma
patent: 5245450 (1993-09-01), Ukai et al.
patent: 5319480 (1994-06-01), McCartney
patent: 5321535 (1994-06-01), Ukai et al.
"Thin Film Transistor for Gray Scale LCD," IBM Technical Disclosure Bulletin, vol. 33, No. 1A, Jun. 1, 1990.
Partial European Search Report dated Jun. 26, 1996.

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