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Display device with touch sensor, potential control method and program

  • US 10,606,431 B2
  • Filed: 07/22/2019
  • Issued: 03/31/2020
  • Est. Priority Date: 11/22/2011
  • Status: Active Grant
First Claim
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1. A display device with a touch sensor comprising:

  • a plurality of pixel electrodes having TFT circuits;

    a common electrode arranged opposite to the pixel electrodes;

    a display function layer having an image display function;

    a display control circuit performing image display control so as to fulfill the display function of the display function layer by applying a voltage for display between the pixel electrodes and the common electrode based on an image signal;

    a gate buffer coupled with gates of the TFT circuits through each of gate lines, the gate buffer being switched to be coupled with one of a first-L line and a first-H line through a first switch; and

    a second line,wherein a drive voltage for display applied to the common electrode by the display control circuit is used as a drive signal for the touch sensor,wherein a signal supplied to the gates of the TFT circuits is one of a pulse wave signal and a signal in which different three potentials are switched at given timings,wherein the three potentials include a first potential supplied through the first-L line, a second potential supplied through the second line, and a third potential supplied through first-H line, andwherein the first switch switches to couple the gate buffer with the first-L line and the first-H line in synchronization with the drive signal in which a first common potential and a second common potential are repeated, such that the gates of the TFT circuits are supplied with the pulse wave signal in which the first potential and the third potential are repeated, the third potential being greater than the first potential and less than the second potential.

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