Touch display device

A method for controlling a touch display device including 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, and a plurality of receive electrodes coupled to the display panel, the method comprising:

• driving 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;
• while the first enable electrode is being driven with the display voltage, driving a second enable electrode of the plurality of enable electrodes and different than the first enable electrode with a transmit voltage biased in a second polarity opposing the first polarity to produce a capacitive coupling between the second enable electrode and one or more receive electrodes of the plurality of receive electrodes;
• and
• recognizing a touch input to the touch display device based on a change in capacitance between the second enable electrode and the one or more receive electrodes.

A touch display device comprising:

• an organic light emitting diode (OLED) display panel including a plurality of display cells each including an OLED, 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 OLED display panel;
• an enable 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 coupled to the first enable electrode, and while the first enable electrode is being driven with the display voltage, drive a subset of two or more enable electrodes of the plurality of enable electrodes with a transmit voltage biased in a second polarity opposing the first polarity to produce a capacitive coupling between the subset of two or more enable electrodes and one or more receive electrodes of the plurality of receive electrodes;
• a display driver configured to, while the first enable electrode is being driven with the display voltage, drive each data electrode of the plurality of data electrodes with an individual brightness voltage to adjust an individual brightness level of the OLED of the display cell connected to the first enable electrode and the corresponding data electrode;
• and
• a touch sense circuit configured to recognize a touch input to the touch display device based on a change in capacitance between the subset of two or more enable electrodes and the one or more receive electrodes.