Patent EP0631271A1 successfully refreshed from Google Patents.
EP0631271A1
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EP
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Active matrix display using storage capacitors
Assignee: Sharp Corp
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Filing: 1994-06-28
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Granted: —
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Expires: 2014-06-28
Abstract
Abstract An active matrix type image display apparatus which includes: a plurality of data signal lines (11); a plurality of scanning signal lines (12) crossing the plurality of data signal lines; and a plurality of pixel portions disposed in a matrix in areas enclosed by the plurality of data signal lines and the plurality of scanning signal lines, wherein each of the plurality of pixel portions includes: a pixel capacitor (Cp1) for storing electric charge supplied from at least one of the plurality of data signal lines, to display an image; storage unit (C1,C2) connected to the pixel capacitor; and switching unit (SW1) which alternately selects one of an operation for electrically connecting the pixel capacitor to the storage unit and an operation for electrically disconnecting the pixel capacitor from the storage unit.
Inventors
- 👤 Hiroshi Yoneda
- 👤 Kenichi Katoh
- 👤 Yutaka Ishii
- 👤 Yasushi Kubota
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:18
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3685; G09G3/3688; G09G3/3648; G09G3/3659; G09G2300/00; G09G2300/08; G09G2300/0809; G09G2300/0842; G09G2310/00; G09G2310/02; G09G2310/0243; G09G2310/0251; G09G2330/00; G09G2330/02; G09G2330/021; G09G2330/023; G09G3/2007; G09G3/2011
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
126 words
An active matrix type image display apparatus comprising: a plurality of data signal lines; a plurality of scanning signal lines crossing the plurality of data signal lines; and a plurality of pixel portions disposed in a matrix in areas enclosed by the plurality of data signal lines and the plurality of scanning signal lines, wherein each of the plurality of pixel portions includes: a pixel capacitor for storing electric charge supplied from at least one of the plurality of data signal lines, to display an image; storage means connected to the pixel capacitor; and switching means which alternately selects one between an operation for electrically connecting the pixel capacitor to the storage means and an operation for electrically disconnecting the pixel capacitor from the storage means.
Claim 2
Dependent Claim
30 words
An image display apparatus according to claim 1, wherein the switching means electrically connects at least one of the data signal lines to the pixel capacitor at a predetermined period.
Claim 3
Dependent Claim
20 words
An image display apparatus according to claim 2, wherein the storage means has a first capacitor and a second capacitor.
Claim 4
Dependent Claim
72 words
An image display apparatus according to claim 3, wherein the switching means receives a first control signal and a second control signal from at least one of the plurality of scanning signal lines, the switching means electrically connecting the pixel capacitor to the first capacitor when the first control signal is received, and the switching means electrically connecting the pixel capacitor to the second capacitor when the second control signal is received.
Claim 5
Dependent Claim
30 words
An image display apparatus according to claim 4, wherein the switching means receives both the first control signal and the second control signal at least once in the predetermined period.
Claim 6
Dependent Claim
84 words
An image display apparatus according to claim 2, wherein the switching means receives a first control signal and a second control signal from at least one of the plurality of scanning signal lines, the switching means transferring electric charge having a positive polarity from the pixel capacitor to the storage means when the first control signal is received, and the switching means transferring electric charge having a negative polarity from the pixel capacitor to the storage means when the second control signal is received.
Claim 7
Dependent Claim
30 words
An image display apparatus according to claim 6, wherein the switching means receives both the first control signal and the second control signal at least once in the predetermined period.
Claim 8
Dependent Claim
44 words
An image display apparatus according to claim 1, wherein the pixel capacitor includes a liquid crystal capacitor having liquid crystal and a pair of electrodes disposed with the liquid crystal interposed therebetween, and a storage capacitor disposed in parallel with the liquid crystal capacitor.
Claim 9
Dependent Claim
150 words
An active matrix type image display apparatus comprising: a plurality of data signal lines; sampling circuits for supplying image signals to the plurality of data signal lines; a plurality of scanning signal lines crossing the plurality of data signal lines; and a plurality of pixel portions disposed in a matrix in areas enclosed by the plurality of data signal lines and the plurality of scanning signal lines, wherein each of the sampling circuits includes: a sampling capacitor for storing electric charge corresponding to the image signal; storage means for storing at least part of the electric charge stored in the sampling capacitor; and switching means which selects one between an operation for supplying at least part of the electric charge stored in the sampling capacitor to the storage means and an operation for supplying at least part of the electric charge stored in the storage means to the sampling capacitor.
Claim 10
Dependent Claim
20 words
An image display apparatus according to claim 9, wherein the storage means includes a first capacitor and a second capacitor.
Claim 11
Dependent Claim
52 words
An image display apparatus according to claim 10, wherein the switching means selects one between an operation for transferring electric charge having a positive polarity between the sampling capacitor and the first capacitor and an operation for transferring electric charge having a negative polarity between the sampling capacitor and the second capacitor.
Claim 12
Dependent Claim
127 words
An active matrix type image display apparatus comprising: a plurality of data signal lines; a plurality of scanning signal lines crossing the plurality of data signal lines; and a plurality of pixel portions disposed in a matrix in areas enclosed by the plurality of data signal lines and the plurality of scanning signal lines, wherein each of the plurality of pixel portions includes a pixel capacitor for storing electric charge supplied from at least one of the plurality of data signal lines, to display an image, and the image display apparatus includes switching means which can electrically connect the pixel capacitor of a first pixel portion of the plurality of pixel portions to the pixel capacitor of a second pixel portion adjacent to the first pixel portion.
Claim 13
Dependent Claim
50 words
An image display apparatus according to claim 12, further comprising at least one control signal line, wherein the switching means electrically connects the pixel capacitor of the first pixel portion to the pixel capacitor of the second pixel portion, according to a control signal received from the control signal line.
Claim 14
Dependent Claim
44 words
An image display apparatus according to claim 12, wherein the pixel capacitor includes a liquid crystal capacitor having liquid crystal and a pair of electrodes disposed with the liquid crystal interposed therebetween, and a storage capacitor disposed in parallel with the liquid crystal capacitor.
Claim 15
Dependent Claim
147 words
An image displaying method used in conjunction with an active matrix type image display apparatus including a plurality of data signal lines, and a plurality of pixel portions disposed in a matrix, each of the plurality of pixel portions having a pixel capacitor for storing electric charge to display an image, the method comprising: a first step of supplying electric charge corresponding to image data to a pixel capacitor of a first pixel portion of the plurality of pixel portions, via one of the plurality of data signal lines; a second step of supplying electric charge corresponding to image data to a pixel capacitor of a second pixel portion of the plurality of pixel portions, via one of the plurality of data signal lines; a third step of electrically connecting the pixel capacitor of the first pixel portion to the pixel capacitor of the second pixel portion.
Claim 16
Dependent Claim
63 words
An image displaying method according to claim 15, wherein the first step is a step of supplying electric charge having a first polarity to the pixel capacitor of the first pixel portion, and the second step is a step of supplying electric charge having a second polarity, which is different from the first polarity, to the pixel capacitor of the second pixel portion.
References Cited (Backward Citations)
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