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Integrated touch and display architectures for self-capacitive touch sensors

  • US 11,086,444 B2
  • Filed: 11/15/2018
  • Issued: 08/10/2021
  • Est. Priority Date: 12/13/2013
  • Status: Active Grant
First Claim
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1. An organic light emitting diode touch sensitive display including a plurality of display pixels, the display comprising:

  • an electrode layer including a plurality of self-capacitance touch sensor electrodes, wherein each of the plurality of self-capacitance touch sensor electrodes is electrically isolated from others of the plurality of self-capacitance touch sensor electrodes;

    a cathode layer that is coupled to AC ground during a touch detection mode of the display and is configured to reduce a parasitic capacitance effect on the plurality of self-capacitance touch sensor electrodes, wherein the parasitic capacitance effect includes an effect from capacitive coupling between the plurality of self-capacitance touch sensor electrodes and the cathode layer, and reducing the parasitic capacitance effect includes reducing the capacitive coupling between the plurality of self-capacitance touch sensor electrodes and the cathode layer;

    an anode layer;

    an organic layer, the organic layer including a plurality of organic light emitting diodes; and

    an encapsulation layer disposed between the cathode layer and the electrode layer.

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