EP0623911A1
Expired / Lapsed
EP
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Method for driving liquid crystal display device
Assignee: Canon Inc
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Filing: 1994-04-27
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Granted: —
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Expires: 2014-04-27
Abstract
Abstract For enabling a liquid display drive with a low voltage and a high speed, each pixel is provided with a liquid crystal cell 5, a switching transistor 7 and an additional capacitance 9, and the additional capacitances are electrically commonly connected for a block of plural pixels. After the image signal is supplied to the pixels corresponding to the block, the potential of desired one of the common electrode lines 52, 52', to which the additional capacitances 9 corresponding to the block are connected, is varied and retained at thus varied value.
Inventors
- 👤 Seiji C/O Canon Kabushiki Kaisha Hashimoto
- 👤 Shigetoshi C/O Canon Kabushiki Kaisha Sugawa
- 👤 Shigeki C/O Canon Kabushiki Kaisha Kondo
- 👤 Takayuki C/O Canon Kabushiki Kaisha Ishii
- 👤 Kazuyuki C/O Canon Kabushiki Kaisha Shigeta
- 👤 Koichi C/O Canon Kabushiki Kaisha Sono
- 👤 Daisuke C/O Canon Kabushiki Kaisha Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 14:08
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3674; G09G3/3677; G09G3/3648; G09G2300/00; G09G2300/08; G09G2300/0876; G09G3/3614
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
A driving method for a liquid crystal display device provided with a plurality of pixels each of which is provided with a switching transistor receiving the supply of a signal inverted at a desired interval, and an additional capacitance for retaining the signal voltage, wherein one of the electrodes of said additional capacitance is connected commonly for a block of said pixels, and the potential of said electrode is varied after the supply of said signal.
Claim 2
Dependent Claim
20 words
A driving method according to claim 1, wherein said electrode is different from the electrode connected to said switching transistor.
Claim 3
Dependent Claim
37 words
A driving method according to claim 1, wherein one of display electrodes of said liquid crystal display device is connected to said switching transistor while the other of said display electrodes is maintained at a common potential.
Claim 4
Dependent Claim
154 words
A driving method for a liquid crystal display device effecting display by the input of a signal, inverted at a desired interval, through switching transistors to pixels respectively provided with additional capacitances: wherein, in each of arbitrary blocks of pixels, one of the electrodes of each of said additional capacitances and one of the electrodes of each pixel are commonly but mutually separately connected electrically, while, in each of said arbitrary blocks, the other electrodes of said additional capacitances and the other pixel electrodes are respectively connected to said switching transistors; and in at least one of said arbitrary blocks, after said signal is supplied to the other electrodes of said additional capacitances and the other pixel electrodes through said switching transistors while a desired potential is supplied to the other electrodes of said additional capacitances, a potential different from the above-mentioned desired potential is supplied to the other electrodes of said additional capacitances.
References Cited (Backward Citations)
US5151805A
Cited
EP0435101A1
Cited
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