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Integrated touch and display architectures for self-capacitive touch sensors

  • US 10,209,813 B2
  • Filed: 09/30/2014
  • Issued: 02/19/2019
  • Est. Priority Date: 12/13/2013
  • Status: Active Grant
First Claim
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1. An organic light emitting diode (OLED) touch sensitive device including a plurality of display pixels, the device comprising:

  • an anode layer;

    a cathode layer, the cathode layer comprising a plurality of circuit elements that are configurable as a plurality of self-capacitance touch pixel electrodes during a touch detection mode of the device, and are configurable as a cathode for an OLED display during a display mode of the device, wherein each of the plurality of self-capacitance touch pixel electrodes is electrically isolated from others of the plurality of self-capacitance touch pixel electrodes, and wherein each of the plurality of self-capacitance touch pixel electrodes represents a unique touch location on a touch sensor panel;

    a stimulation circuit, the stimulation circuit configured to stimulate the self-capacitance touch pixel electrodes during the touch detection mode of the device; and

    a bootstrapping circuit, the bootstrapping circuit configured to stimulate the anode layer of the device with substantially the same signal as being used by the stimulation circuit to stimulate the self-capacitance touch pixel electrodes during the touch detection mode of the device.

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