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EP0216168A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method of driving a display panel

Assignee: Canon Inc
•
Filing: 1986-08-25
•
Granted: —
•
Expires: 2006-08-25
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Abstract

Abstract The specification and drawings intend to disclose the technique in a method of driving a liquid crystal display panel which is suitable to display a multivalue image such as a television image or the like, whereby the image signal is inverted by integer times of the horizontal sync signal and applied to the source lines, the same inversion control signal is also synchronously applied to the common opposite electrode, thereby remarkably reducing the driving voltage of the source lines. In this manner, a high-speed CMOS device of a low withstanding voltage can be used as an integrated circuit to drive the source lines.

Inventors

  • 👤 Shinichi Yamashita
  • 👤 Hideo Kanno
  • 👤 Atsushi Mizutome
  • 👤 Hiroshi Inoue

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 14:37
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H04N3/127; G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3614; G09G3/3648; G09G3/3655; G09G3/3666; G09G3/3685; G09G3/3688; G09G2310/00; G09G2310/02; G09G2310/0264; G09G2310/0297; G09G3/2007; G09G3/2011; Y; Y10; Y10S; Y10S359/00; Y10S359/90

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 67 words
A method of driving-a display panel of an active matrix type using source lines and gate lines, comprising the steps of: using an inversion control signal in which the number of inverting times of an image signal is increased by integer times of a horizontal sync signal on the input side of the source line; and driving a common opposite electrode synchronously with said inversion control signal.
Claim 2
Independent Claim 67 words
A method of driving-a display panel of an active matrix type using source lines and gate lines, comprising the steps of: using an inversion control signal in which the number of inverting times of an image signal is increased by integer times of a horizontal sync signal on the input side of the source line; and driving a common opposite electrode synchronously with said inversion control signal.
Claim 3
Dependent Claim 27 words
A driving method according to claim 1, wherein an inverting period of the image signal is substantially the same as the period of the horizontal sync signal.
Claim 4
Dependent Claim 32 words
A driving method according to claim 1, wherein said source lines are connected to a circuit having matrix wirings which are constituted by n switching signal lines and m image signal lines.
Claim 5
Dependent Claim 18 words
A driving method according to claim 3, wherein said circuit has analog switching transistors for the image signal.
Claim 6
Dependent Claim 16 words
A driving method according to claim 3, wherein said circuit has a sample and hold circuit.
Claim 7
Dependent Claim 20 words
A driving method according to claim 5, wherein said sample and hold circuit has a capacitor for sampling and holding.
Claim 8
Dependent Claim 25 words
A driving method according to claim 1, wherein said source and gate lines are respectively connected to source and gate of a thin film transistor.
Claim 9
Dependent Claim 18 words
A driving method according to claim 7, wherein said thin film transistor has amorphous silicon as a semiconductor.

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