Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1996-09-09
1997-09-30
Liang, Regina D.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 98, 345147, G09G 336
Patent
active
056730616
ABSTRACT:
A driving circuit of the invention is used for driving a display apparatus which includes pixels and data lines for applying voltages to the pixels and which displays an image with multiple gray scales in accordance with video data consisting of a plurality of bits. The driving circuit includes: an oscillating signal specifying section for specifying one of a plurality of oscillating signals having respective mean values which are different from each other in accordance with video data consisting of bits selected from the plurality of bits, and for outputting the specified oscillating signal T and an oscillating signal T-bar which is obtained by inverting the specified oscillating signal T; a gray-scale voltage specifying section for producing gray-scale voltage specifying signals which specify a first gray-scale voltage and a second gray-scale voltage among a plurality of gray-scale voltages supplied from a gray-scale voltage supply section, in accordance with video data consisting of bits other than the selected bits of the plurality of bits; and an output section for outputting the first gray-scale voltage and the second gray-scale voltage specified by the gray-scale voltage specifying signals to the data lines, in accordance with the oscillating signal T and the oscillating signal T-bar.
REFERENCES:
patent: 5162786 (1992-11-01), Fukada
patent: 5583531 (1996-12-01), Okada et al.
Article entitled "TFT-LCDs Using Newly Designed 6-bit Digital Data Drivers" by Messrs. Okada, Uehira, Fukuoka, Kanatani, and Hijikigawa from Sharp Corp., Nara, Japan; 1993 SID International Symposium, pp. 11-14 of the SID 93 DIGEST.
Okada Hisao
Seo Mitsuyoshi
Tanaka Kuniaki
Yamamoto Yuji
Liang Regina D.
Sharp Kabushiki Kaisha
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