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TOUCH SCREEN LIQUID CRYSTAL DISPLAY

  • US 20140152619A1
  • Filed: 02/06/2014
  • Published: 06/05/2014
  • Est. Priority Date: 06/09/2006
  • Status: Active Grant
First Claim
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1. An electronic device incorporating an in-plane-switching (IPS) liquid crystal display touch screen, the touch screen comprising:

  • a first substrate having pairs of electrodes for display pixels of the liquid crystal display;

    the pairs of electrodes disposed in an in-plane-switching arrangement;

    a second substrate, the second substrate having a color filter plate;

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

    a plurality of sense lines disposed between the first substrate and the pairs of electrodes;

    in a display mode of operation, the pairs of electrodes operative as pixel electrodes and common electrodes, the pixel electrodes connected to receive display data and the common electrodes connected to receive a Vcom modulation voltage; and

    in a touch sensing mode of operation, the common electrodes connected to receive a stimulation signal and the plurality of sense lines connected to capacitive sensing circuitry.

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