Abstract: A method of projected capacitance touch sensing on a display includes updating the display by applying a drive waveform to each pixel of the display over a plurality of frame periods to update a pixel state. The updating includes selecting each row of the display in turn and repeating a frame update to drive pixels with successive time slices of the drive waveforms. The method further includes sensing a signal from a projected capacitance touch sensing electrode of the display during a sensing interval to provide a touch sensing response; identifying when column drive levels of the drive waveforms for pixels of one selected row change by more than a threshold level between the selected row and a next selected row; and inhibiting the touch sensing responsive to the column drive row change signal indicating a greater than the threshold level change of the drive levels between the selected rows.

Abstract: A method of projected capacitance touch sensing on a display screen, the method comprising: updating said display screen by applying a drive waveform to each pixel of the display screen over a plurality of frame periods, wherein a said drive waveform for a pixel defines a transition of the pixel from a current pixel state to an updated pixel state over said plurality of frame periods, and wherein said updating comprises selecting each row of said display screen in turn for a row driving period and driving columns of the display screen with a time slice of drive waveforms for pixels of the row to perform a frame update of said display screen, and repeating said frame update to drive pixels of said display with a plurality of successive time slices of said drive waveforms to drive said pixels with said drive waveforms; sensing a signal from a projected capacitance touch sensing electrode of said display screen during a sensing interval, and using said sensing to provide a touch sensing response; identifying whe