EP0612184A2
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EP
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Display apparatus and a data signal forming method for the display apparatus
Assignee: AGC Inc
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Filing: 1994-02-18
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Granted: —
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Expires: 2014-02-18
Abstract
Abstract 5 n7 A display apparatus wherein the light transmittance of a pixel selected by a scanning electrode and a data electrode is changed in response to the difference of voltages applied to the scanning electrode and the data electrode, which comprises a display panel having a plurality of scanning electrodes and a plurality of data electrodes, a scanning voltage generator for applying a scanning voltage to the scanning electrodes of the display panel by receiving a scanning signal, a data voltage generator for applying a data voltage to the data electrodes of the display panel by receiving a data signal, an orthogonal function generator for generating an orthogonal function signal having substantially orthogonality, and a data signal forming circuit for operating the data signal based on a predetermined video signal and the orthogonal function signal generated from the orthogonal function generator, wherein the data signal forming circuit includes a field video signal converter for distributing signals for a single picture to those for a plurality of sub-pictures, and an orthogonal conversion signal generator for effecting orthogonal conversion of an input signal by the orthogonal function signal generated from the orthogonal function generator, the field video signal converter and the orthogonal conversion signal generator being connected in series, and a correction signal generator for generating a correction signal to be included in the data signal so that an effective voltage applied to a pixel in a non-selection time is substantially constant to any pixel.
Inventors
- 👤 Goro Asahi Glass Co. Ltd. Asari
- 👤 Temkar N. Ruckmongathan
- 👤 Takeshi Asahi Glass Co. Ltd. Kuwata
- 👤 Yutaka Asahi Glass Co. Ltd. Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:29
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3648; H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H04N3/127; G09G3/3622; G09G3/3625; G09G2310/00; G09G2310/02; G09G2310/0202; G09G2310/0205; G09G2310/0264; G09G3/2007; G09G3/2011; G09G3/2018
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
246 words
A display apparatus wherein the light transmittance of a pixel selected by a scanning electrode and a data electrode is changed in response to the difference of voltages applied to the scanning electrode and the data electrode, said display apparatus being characterized by comprising: a display panel having a plurality of scanning electrodes and a plurality of data electrodes, a scanning voltage generator for applying a scanning voltage to the scanning electrodes of the display panel by receiving a scanning signal, a data voltage generator for applying a data voltage to the data electrodes of the display panel by receiving a data signal, an orthogonal function generator for generating an orthogonal function signal having substantial orthogonality, and a data signal forming circuit for operating the data signal based on a predetermined video signal and the orthogonal function signal generated from the orthogonal function generator, wherein the data signal forming circuit includes a field video signal converter for distributing signals for a single picture to those for a plurality of sub-pictures, and an orthogonal conversion signal generator for effecting orthogonal conversion of an input signal by the orthogonal function signal generated from the orthogonal function generator, the field video signal converter and the orthogonal conversion signal generator being connected in series, and a correction signal generator for generating a correction signal to be included in the data signal so that an effective voltage applied to a pixel in a non-selection time is substantially constant to any pixel.
Claim 2
Dependent Claim
246 words
A display apparatus wherein the light transmittance of a pixel selected by a scanning electrode and a data electrode is changed in response to the difference of voltages applied to the scanning electrode and the data electrode, said display apparatus being characterized by comprising: a display panel having a plurality of scanning electrodes and a plurality of data electrodes, a scanning voltage generator for applying a scanning voltage to the scanning electrodes of the display panel by receiving a scanning signal, a data voltage generator for applying a data voltage to the data electrodes of the display panel by receiving a data signal, an orthogonal function generator for generating an orthogonal function signal having substantial orthogonality, and a data signal forming circuit for operating the data signal based on a predetermined video signal and the orthogonal function signal generated from the orthogonal function generator, wherein the data signal forming circuit includes a field video signal converter for distributing signals for a single picture to those for a plurality of sub-pictures, and an orthogonal conversion signal generator for effecting orthogonal conversion of an input signal by the orthogonal function signal generated from the orthogonal function generator, the field video signal converter and the orthogonal conversion signal generator being connected in series, and a correction signal generator for generating a correction signal to be included in the data signal so that an effective voltage applied to a pixel in a non-selection time is substantially constant to any pixel.
Claim 3
Dependent Claim
30 words
The display apparatus according to Claim 1, wherein an output from the correction signal generator is superposed on outputs from the field video signal converter or the orthogonal function generator.
Claim 4
Dependent Claim
30 words
The display apparatus according to Claim 1, wherein the output from the correction signal generator is superposed on inputs to the field video signal converter or the orthogonal function generator.
Claim 5
Dependent Claim
28 words
The display apparatus according to Claim 1, wherein the data signal forming circuit includes a field counter for supplying a picture number to the field video signal converter.
Claim 6
Dependent Claim
17 words
The display apparatus according to Claim 1, wherein the display apparatus is a liquid crystal display apparatus.
Claim 7
Dependent Claim
139 words
A data signal forming method for driving a display apparatus by applying a selection voltage simultaneously to a plurality of scanning electrodes, said display apparatus being provided with a plurality of scanning electrodes and a plurality of data electrodes wherein the light transmittance of a pixel selected by a scanning electrode and a data electrode is changed in response to the difference of voltages applied to the scanning electrode and the data electrode, the data signal forming method being characterized in that data signals include: (1) a first signal formed by distributing video signals for a single picture to those for a plurality of sub-pictures and by conducting orthogonal conversion, and (2) a second signal for correcting the first signal so that an effective voltage applied to a pixel in a non-selection time is substantially constant to any pixel.
Claim 8
Dependent Claim
139 words
A data signal forming method for driving a display apparatus by applying a selection voltage simultaneously to a plurality of scanning electrodes, said display apparatus being provided with a plurality of scanning electrodes and a plurality of data electrodes wherein the light transmittance of a pixel selected by a scanning electrode and a data electrode is changed in response to the difference of voltages applied to the scanning electrode and the data electrode, the data signal forming method being characterized in that data signals include: (1) a first signal formed by distributing video signals for a single picture to those for a plurality of sub-pictures and by conducting orthogonal conversion, and (2) a second signal for correcting the first signal so that an effective voltage applied to a pixel in a non-selection time is substantially constant to any pixel.
Claim 9
Dependent Claim
31 words
The data signal forming method for a display apparatus according to Claim 6, wherein the data signal is formed by superposing the first and second signals in a separate time period.
Claim 10
Dependent Claim
60 words
The data signal forming method for a display apparatus according to Claim 6, wherein the data signal including the first and second signals in simultaneous superposition is formed by operating the second signal for each group as the scanning electrodes are simultaneously selected, and a signal obtained by the operation is superposed on a video signal, followed by orthogonal conversion.
Claim 11
Dependent Claim
23 words
The data signal forming method for a display apparatus according to Claim 6, wherein the display apparatus is a liquid crystal display apparatus.
References Cited (Backward Citations)
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