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Liquid crystal display having common voltage regenerator and driving method thereof

  • US 8,310,427 B2
  • Filed: 07/14/2008
  • Issued: 11/13/2012
  • Est. Priority Date: 07/13/2007
  • Status: Active Grant
First Claim
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1. A liquid crystal display comprising:

  • a liquid crystal panel comprising;

    a first substrate including a common electrode layer formed thereon;

    a second substrate opposite to the first substrate; and

    a liquid crystal layer sandwiched between the first and second substrates;

    a plurality of data lines and a plurality of gate lines provided on the second substrate and crossing each other to define a plurality of pixel units, each pixel unit comprising a liquid crystal capacitor, and a storage capacitor, each liquid crystal capacitor comprising a pixel electrode for receiving gradation voltages applied by a corresponding one of the data lines, the common electrode layer opposite to the pixel electrode and the liquid crystal layer sandwiched therebetween; and

    each storage capacitor comprising the pixel electrode, a storage electrode opposite to the pixel electrode and an insulating material sandwiched therebetween; and

    a first common voltage line and a second common voltage line formed at two opposite sides of the second substrate for sandwiching the plurality of pixel units, both of the first and second common voltage lines connected to each storage electrode;

    a common voltage generator configured to provide a common voltage to the storage electrode via the first common voltage line;

    a common voltage regenerator configured to receive a voltage on the second common voltage line as a common feedback voltage, generate a common regenerative voltage via a common line according to the common feedback voltage, and provide the common regenerative voltage to the common electrode layer; and

    the common line located on the second substrate and electrically connected to the common electrode layer via silver paste, the common regenerative voltage being applied to the common electrode layer via the common line and the silver paste in sequence;

    wherein the common line is located between a first edge of the second substrate and the first common voltage line, and between a second edge of the second substrate and the second common voltage line.

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