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Touch screen display and method of driving the touch screen display with signal adjustment

  • US 8,970,512 B2
  • Filed: 12/22/2010
  • Issued: 03/03/2015
  • Est. Priority Date: 12/22/2010
  • Status: Active Grant
First Claim
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1. A touch screen display device comprising:

  • a display panel comprising a plurality of display elements arranged between a first electrode layer and a second electrode layer having respective pixel electrodes for the display elements;

    a display driver for providing display signals to the display panel, said display signals comprising;

    a common display signal, andan input control signal for controlling the display panel;

    a sensor circuit for providing a probe signal and a shield signal, and for generating a touch signal in response to an output signal received from the first electrode layer, wherein the phase and frequency of the probe signal are identical to the phase and frequency of the shield signal; and

    a combination unit for providing a drive signal to the first electrode layer derived from the common display signal and the probe signal, and for providing the output control signal for controlling the display panel, wherein the output control signal is derived from the input control signal and the shield signal.

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