Plastic Logic Limited

Flexenable Limited

Edward Simons

Ivan Cronin

Steven Paul Farmer

Philip Moyse

Nicholas Simon Terry

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.

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Cambridge, United Kingdom

Edward Simons