EP0461928A2
Expired / Lapsed
EP
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A column electrode driving circuit for a display apparatus
Assignee: Sharp Corp
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Filing: 1991-06-14
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Granted: —
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Expires: 2011-06-14
Abstract
Abstract The column electrode driving circuit is suitable for driving a display apparatus which has a delta arrangement display unit. The video signals for two rows in the display unit are sampled simultaneously by two sample-hold circuits with sampling timings which differ mutually by one-half of the sampling period. The outputs of the two sample-hold circuits are alternatingly supplied to column electrodes of the display unit.
Inventors
- 👤 Takafumi Kawaguchi
- 👤 Shiro Takeda
- 👤 Hiroshi Take
- 👤 Junji Kawanishi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 20:51
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H04N3/127; G09G3/3611; G09G3/3685; G09G3/3688; G09G2310/00; G09G2310/02; G09G2310/0264; G09G2310/0297; G09G3/2007; G09G3/2011
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
92 words
A column electrode driving circuit for driving column electrodes of a display apparatus, comprising: a plurality of sample-hold means for receiving a video signal, for sampling said video signal, and for holding said sampled video signal, the sampling periods of said sample-hold means being substantially the same with each other, the sampling timings of said sample-hold means being different from each other; and output means for selecting one of said sample-hold means, and for driving said column electrodes on the basis of the sampled video signal held in said selected sample-hold means.
Claim 2
Dependent Claim
18 words
A column electrode driving circuit according to claim 1, wherein the number of said sample-hold means is two.
Claim 3
Dependent Claim
29 words
A column electrode driving circuit according to claim 2, wherein the sampling timings of said two sample-hold means are different from each other by one-half of said sampling period.
Claim 4
Dependent Claim
38 words
A column electrode driving circuit according to claim 2, wherein said driving circuit further comprises sample signal generating means for sequentially generating sample signals, the number of said sample signals being twice the number of said column electrodes.
Claim 5
Dependent Claim
55 words
A column electrode driving circuit according to claim 4, wherein one of said two sample-hold means receives the odd ones of said sample signals, and the other of said two sample-hold means receives the even ones of said sample signals, said two sample-hold means performing the sampling in accordance with said received sample signals, respectively.
Claim 6
Dependent Claim
42 words
A column electrode driving circuit according to claim 2, wherein said driving circuit further comprises first and second sample signal generating means for sequentially generating sample signals, the number of said sample signals being equal to the number of said column electrodes.
Claim 7
Dependent Claim
44 words
A column electrode driving circuit according to claim 6, wherein one of said two sample-hold means receives sample signals from said first sample signal generating means, and the other of said two sample-hold means receives sample signals from said second sample signal generating means.
Claim 8
Dependent Claim
42 words
A column electrode driving circuit according to claim 4, wherein said driving circuit further comprises selection means coupled to the output of said sample signal generating means, and for selectively outputting either of said odd and even ones of said sample signals.
Claim 9
Dependent Claim
55 words
Column electrode driver for driving the column electrodes in a matrix display, wherein two or more sample hold means each sample a video signal in a line period to extract a respective set of drive signals to be applied to the column electrodes, wherein the sampling timings are different for different said sample hold means.
References Cited (Backward Citations)
No citation records indexed.
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