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Touch display device

  • US 9,851,854 B2
  • Filed: 06/01/2015
  • Issued: 12/26/2017
  • Est. Priority Date: 12/16/2014
  • Status: Active Grant
First Claim
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1. A device comprising:

  • a display panel including a plurality of display cells each including a display element, a plurality of data electrodes connected to the plurality of display cells, and a plurality of enable electrodes connected to the plurality of display cells, where each display cell of the plurality of display cells is connected to a different pair of an enable electrode of the plurality of enable electrodes and a data electrode of the plurality of data electrodes;

    a plurality of receive electrodes coupled to the display panel;

    an enable electrode driver configured to drive a first enable electrode of the plurality of enable electrodes with a display voltage biased in a first polarity to activate display cells of the plurality of display cells coupled to the first enable electrode, and drive a second enable electrode of the plurality of enable electrodes that is different than the first enable electrode with a transmit voltage biased in a second polarity opposing the first polarity and that does not activate the display cells of the plurality of display cells coupled to the second enable electrode and produces a capacitive coupling between the second enable electrode and one or more receive electrodes of the plurality of receive electrodes; and

    a touch sense circuit configured to recognize a touch input to the device based on a change in capacitance between the second enable electrode and the one or more receive electrodes.

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