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US5537129A
Expired / Lapsed
US
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Common electrode driving circuit for use in a display apparatus
Assignee: Sharp Corp
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Filing: 1993-12-23
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Granted: 1996-07-16
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Expires: 2013-12-23
Abstract
Abstract A common electrode driving circuit for use in a display apparatus including a first substrate; a second substrate opposed to the first substrate with a display medium interposed therebetween; a plurality of pixel electrodes, a plurality of common electrode driving terminals provided on a surface of the first substrate opposed to the second substrate; and at least one common electrode provided on a surface of the second substrate opposed to the first substrate. The common electrode is opposed to the plurality of pixel electrodes and is connected to the plurality of common electrode driving terminals respectively through a plurality of common electrode transfer resistances. The common electrode driving circuit includes a detection device for detecting a resultant voltage applied to the common electrode through at least one of the plurality of common electrode transfer resistances; and a driving voltage generating circuit for generating a driving voltage based on a reference signal and a resultant voltage applied to the common electrode which is detected by the detection device and outputting the driving voltage to the plurality of common electrode driving terminals.
Inventors
- 👤 Hisao Okada
- 👤 Tadatsugu Nishitani
- 👤 Yuji Yamamoto
- 👤 Takeshi Takarada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:16
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3648; G09G3/3655; G02; G02F; G02F2203/00; G02F2203/66; G09G2320/00; G09G2320/02; G09G2320/0209
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
206 words
A common electrode driving circuit for use in a display apparatus including a first substrate; a second substrate opposed to the first substrate; a display medium interposed between the first substrate and the second substrate; a plurality of pixel electrodes, a plurality of common electrode driving terminals provided on a surface of the first substrate opposed to the second substrate; and at least one common electrode provided on a surface of the second substrate opposed to the first substrate, the common electrode being opposed to the plurality of pixel electrodes and being connected to the plurality of common electrode driving terminals respectively through a plurality of common electrode transfer resistances, the common electrode driving circuit comprising: detection means for detecting a resultant voltage applied to the common electrode through at least one of the plurality of common electrode transfer resistances and including a high impedance element; and driving voltage generating means for generating a driving voltage based on a reference signal and the resultant voltage applied to the common electrode which is detected by the detection means and outputting the driving voltage to the common electrode through at least one of the plurality of common electrode transfer resistances which is not connected to the detecting means.
Claim 2
Dependent Claim
206 words
A common electrode driving circuit for use in a display apparatus including a first substrate; a second substrate opposed to the first substrate; a display medium interposed between the first substrate and the second substrate; a plurality of pixel electrodes, a plurality of common electrode driving terminals provided on a surface of the first substrate opposed to the second substrate; and at least one common electrode provided on a surface of the second substrate opposed to the first substrate, the common electrode being opposed to the plurality of pixel electrodes and being connected to the plurality of common electrode driving terminals respectively through a plurality of common electrode transfer resistances, the common electrode driving circuit comprising: detection means for detecting a resultant voltage applied to the common electrode through at least one of the plurality of common electrode transfer resistances and including a high impedance element; and driving voltage generating means for generating a driving voltage based on a reference signal and the resultant voltage applied to the common electrode which is detected by the detection means and outputting the driving voltage to the common electrode through at least one of the plurality of common electrode transfer resistances which is not connected to the detecting means.
Claim 3
Dependent Claim
17 words
A common electrode driving circuit according to claim 1, wherein the driving voltage is a DC voltage.
Claim 4
Dependent Claim
17 words
A common electrode driving circuit according to claim 1, wherein the driving voltage is an AC voltage.
Claim 5
Dependent Claim
226 words
A common electrode driving circuit for use in an AC driving display apparatus including a first substrate; a second substrate opposed to the first substrate; a display medium interposed between the first substrate and the second substrate; a plurality of pixel electrodes, a plurality of common electrode driving terminals provided on a surface of the first substrate opposed to the second substrate; and at least one common electrode provided on a surface of the second substrate opposed to the first substrate, the common electrode being opposed to the plurality of pixel electrodes and being connected to the plurality of common electrode driving terminals respectively through a plurality of common electrode transfer resistances, the common electrode driving circuit comprising: detection means for detecting a resultant voltage applied to the common electrode through at least one of the plurality of common electrode transfer resistances and including a high impedance element; and driving voltage generating means for generating an AC driving voltage based on a reference signal and the resultant voltage applied to the common electrode which is detected by the detection means and outputting the AC driving voltage to the common electrode through at least one of the plurality of common electrode transfer resistances which is not connected to the detecting means, wherein the reference signal and the resultant voltage coincide with each other in phase and waveform.
Claim 6
Dependent Claim
226 words
A common electrode driving circuit for use in an AC driving display apparatus including a first substrate; a second substrate opposed to the first substrate; a display medium interposed between the first substrate and the second substrate; a plurality of pixel electrodes, a plurality of common electrode driving terminals provided on a surface of the first substrate opposed to the second substrate; and at least one common electrode provided on a surface of the second substrate opposed to the first substrate, the common electrode being opposed to the plurality of pixel electrodes and being connected to the plurality of common electrode driving terminals respectively through a plurality of common electrode transfer resistances, the common electrode driving circuit comprising: detection means for detecting a resultant voltage applied to the common electrode through at least one of the plurality of common electrode transfer resistances and including a high impedance element; and driving voltage generating means for generating an AC driving voltage based on a reference signal and the resultant voltage applied to the common electrode which is detected by the detection means and outputting the AC driving voltage to the common electrode through at least one of the plurality of common electrode transfer resistances which is not connected to the detecting means, wherein the reference signal and the resultant voltage coincide with each other in phase and waveform.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-16 | 2000-01-15 | 2000-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-16 | 2004-01-15 | 2004-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-16 | 2008-01-15 | 2008-07-16 | $7700.00 | Window Closed / Lapsed |