Liquid crystal display device

  • US 20090135124A1
  • Filed: 11/24/2008
  • Published: 05/28/2009
  • Est. Priority Date: 11/27/2007
  • Status: Active Grant
First Claim
Patent Images

1. A liquid crystal display device, comprising:

  • pixels that are formed by a liquid crystal layer;

    display electrodes disposed across the liquid crystal layer;

    a counter electrode made of a transparent material, and which displays an image by applying a drive voltage to said liquid crystal layer,the drive voltage corresponding to a potential difference between each of said display electrodes and said counter electrode;

    a source voltage supplying part that supplies source voltages based on image signals to said display electrodes;

    a feedback voltage supplying part that outputs a feedback voltage corresponding to a potential in a certain area of said counter electrode; and

    a common voltage supplying part that compares aid feedback voltage with a reference voltage, feedback controls the common voltage based on the result of the comparison, and supplies the thus controlled common voltage to the counter electrode.

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