Liquid crystal display device having an alternating common elect

Details Liquid crystal display device having an alternating common elect Liquid crystal display device having an alternating common elect

1996-09-24

1999-08-03

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

349 34, 345 94, G02F 1133, G09G 336

Patent

active

059332026

ABSTRACT:
An active-matrix liquid crystal display device applies a voltage modulated with a high-frequency AC voltage to a common electrode disposed on a substrate which confronts a substrate having a plurality of thin-film transistors as switching elements for pixel electrodes. The modulated voltage applied to the common electrode is effective to reduce the phenomenon of a residual image retained for a long period of time; thereby improving the quality of displayed images.

REFERENCES:
patent: 4319237 (1982-03-01), Matsuo et al.
patent: 5026144 (1991-06-01), Taniguchi et al.
patent: 5245455 (1993-09-01), Sayyah et al.
patent: 5260817 (1993-11-01), Kaneko et al.
patent: 5561442 (1996-10-01), Okada et al.

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