Drive circuit for a display apparatus

Details Drive circuit for a display apparatus Drive circuit for a display apparatus

1995-04-05

1997-06-03

Hjerpe, Richard

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345204, 345210, G09G 336

Patent

active

056359500

ABSTRACT:
In a drive circuit for a display apparatus into which a digital video signal is input and in which a plurality of parallel signal electrodes are provided, one of signal voltages having different levels is output in accordance with the digital video signal, or two adjacent ones of said signal voltages are simultaneously output. Alternatively, one of the signal voltages is supplied to a signal electrode in one portion of one output period, and another one of the signal voltages is supplied to the signal electrode in another portion of the output period. The length ratio of the two portions of one output period is appropriately determined according to the digital video signal, whereby an arbitrary voltage corresponding to the video signal data can be applied to the pixel.

REFERENCES:
patent: 4739312 (1988-04-01), Oudshoorn et al.
patent: 4748444 (1988-05-01), Arai
patent: 4775891 (1988-10-01), Aoki et al.
patent: 4921334 (1990-05-01), Akodes
patent: 5196738 (1993-03-01), Takahara et al.
patent: 5363118 (1994-11-01), Okumura
patent: 5521611 (1996-05-01), Okada et al.
IBM Technical Disclosure Bulletin, vol. 33, No. 6B, Nov. 1990, pp. 384-385, "Driving Method for TFT/LCD Grayscale."
Patent Abstracts of Japan, Oct. 1988, abstracting JP 63-141414, Kinoshita/Matsushita.

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