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Liquid crystal display device having an improved precharge circuit and method of driving same

  • US 20030132903A1
  • Filed: 01/07/2003
  • Published: 07/17/2003
  • Est. Priority Date: 01/16/2002
  • Status: Active Grant
First Claim
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1. A method of driving a liquid crystal display device, said liquid crystal display device including a liquid crystal layer, a plurality of pixels arranged in a matrix configuration, each of said plurality of pixels being provided with a pixel electrode for generating an electric field in said liquid crystal layer between said pixel electrode and a common electrode associated with said plurality of pixels in common, a plurality of video signal lines coupled to said plurality of pixels, a plurality of scanning lines arranged to intersect said plurality of video signal lines and coupled to said plurality of pixels, and a driver circuit for outputting a charging voltage at a beginning of a horizontal scanning period and then a gray scale voltage corresponding to a display data to said plurality of video signal lines, said method comprising:

  • inverting a polarity of said gray scale voltage with respect to a common voltage on said common electrode every N lines of said plurality of scanning lines, where N≧

    2; and

    making a first charging time of said charging voltage corresponding to a first line of N lines of said plurality of scanning lines scanned immediately after inversion of said polarity of said gray scale voltage different from a second charging time of said charging voltage corresponding to a second line of said N lines scanned immediately succeeding said first line.

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