Patent EP0478386A2 successfully refreshed from Google Patents.
EP0478386A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Drive circuit for a display apparatus
Assignee: Sharp Corp
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Filing: 1991-09-27
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Granted: —
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Expires: 2011-09-27
Abstract
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 a digital video signal, whereby an arbitrary voltage corresponding to the video signal data can be applied to the pixel.
Inventors
- 👤 Hisao Okada
- 👤 Shigeyuki Uehira
- 👤 Katumi Miki
- 👤 Kuniaki Tanaka
- 👤 Toshihiro Yanagi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 20:58
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/2007; G09G3/2011; G09G3/2077; G09G3/2081; G09G3/34; G09G3/36; G09G3/3611; G09G3/3685; G09G3/3688; H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H04N3/127; G09G2310/00; G09G2310/02; G09G2310/0264; G09G2310/027; G09G3/2014
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
90 words
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, comprising: voltage supplying means for supplying a plurality of signal voltages, the levels of said signal voltages being different from each other; and voltage selecting means, connected to said voltage supplying means, for receiving said digital video signal, and for, in accordance with said digital video signal, selectively outputting one of said signal voltages or simultaneously outputting two adjacent ones of said signal voltages.
Claim 2
Dependent Claim
20 words
A drive circuit according to claim 1, wherein said voltage selecting means is provided for each of said signal electrodes.
Claim 3
Dependent Claim
48 words
A drive circuit according to claim 1, wherein said voltage selecting means comprises: a plurality of switch means, the number of said switch means being equal to the number of said signal voltages; and selection means for producing selection signals, said selection signals respectively controlling said switch means.
Claim 4
Dependent Claim
102 words
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, comprising: voltage supplying means for supplying a plurality of signal voltages, the levels of said signal voltages being different from each other; and voltage selecting means, connected to said voltage supplying means, for receiving said digital video signal, and for, in accordance with said digital video signal, selectively outputting one of said signal voltages in one portion of a signal output period and another of said signal voltages in another portion of said signal output period.
Claim 5
Dependent Claim
20 words
A drive circuit according to claim 4, wherein said voltage selecting means is provided for each of said signal electrodes.
Claim 6
Dependent Claim
48 words
A drive circuit according to claim 4, wherein said voltage selecting means comprises: a plurality of switch means, the number of said switch means being equal to the number of said signal voltages; and selection means for producing selection signals, said selection signals respectively controlling maid switch means.
Claim 7
Dependent Claim
147 words
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, comprising: voltage supplying means for supplying a plurality of signal voltages, the levels of said signal voltages being different from each other; time control means for receiving one portion of said digital video signal, and for producing a time division signal indicative of two or more divided periods of one signal output period; and voltage selecting means, connected to said voltage supplying means and said time control means, for receiving said digital video signal, for, in accordance with said time division signal, outputting none of said signal voltages in one of said divided periods, and for, in accordance with the remaining portion of said digital video signal, selectively outputting one of said signal voltages in another one of said divided periods.
Claim 8
Dependent Claim
20 words
A drive circuit according to claim 7, wherein said voltage selecting means is provided for each of said signal electrodes.
Claim 9
Dependent Claim
48 words
A drive circuit according to claim 7, wherein said voltage selecting means comprises: a plurality of switch means, the number of said switch means being equal to the number of said signal voltages; and selection means for producing selection signals, said selection signals respectively controlling said switch means.
Claim 10
Dependent Claim
144 words
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, comprising: voltage supplying means for supplying a plurality of signal voltages, the levels of said signal voltages being different from each other; time control means for receiving one portion of said digital video signal, and for producing a time division signal indicative of two or more divided periods of one signal output period; and voltage selecting means, connected to said voltage supplying means and said time control means, for receiving said digital video signal, for, in accordance with said time division signal and the remaining portion of said digital video signal, outputting one of said signal voltages in one of said divided periods, and for outputting another one of said signal voltages in another of said divided periods.
Claim 11
Dependent Claim
20 words
A drive circuit according to claim 10, wherein said voltage selecting means in provided for each of said signal electrodes.
Claim 12
Dependent Claim
48 words
A drive circuit according to claim 10, wherein said voltage selecting means comprises: a plurality of switch means, the number of said switch means being equal to the number of said signal voltages; and selection means for producing selection signals, said selection signals respectively controlling said switch means.
Claim 13
Dependent Claim
83 words
A drive circuit for a display apparatus in which a drive voltage to be applied to a display drive line (On) is output by a voltage selection means to which a plurality of signal voltages of different levels is supplied, characterised in that said voltage selection means is selectively operable to provide a range of different drive voltage levels including not only said plurality of signal voltage levels but also intermediate levels each derived from one or more of said signal voltage levels.
References Cited (Backward Citations)
No citation records indexed.
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