Liquid crystal display device having a common voltage compensator

  • US 10,372,257 B2
  • Filed: 10/26/2015
  • Issued: 08/06/2019
  • Est. Priority Date: 12/22/2014
  • Status: Active Grant
First Claim
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1. An in-cell type touch liquid crystal display device comprising:

  • an in-cell type touch liquid crystal display panel including;

    a plurality of data lines that receive data voltages;

    a plurality of gate lines that receive gate signals;

    a plurality of pixels at crossing regions of the plurality of data lines and the plurality of gate lines, each of the plurality of pixels including one pixel electrode;

    a plurality of common electrodes supplied with a common voltage, wherein each of the common electrodes is shared by some neighboring pixels, and the pixels are grouped by the common electrodes;

    a plurality of common lines supplying the common voltage to the common electrodes, wherein one of the common lines is connected to one of the common electrodes; and

    a plurality of feedback lines that overlap the common electrodes, the plurality of feedback lines receiving a variation of the common voltage that is reflected by the common electrodes onto the plurality of feedback lines, wherein each of the plurality of feedback lines is provided between two adjacent pixel electrodes and is parallel to adjacent common lines; and

    a common voltage compensator that compensates the common voltage based on the variation of the common voltage that is reflected onto the plurality of feedback lines.

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