Touch sensing apparatus

摘要

There is provided a touch sensing apparatus including: a panel unit including a plurality of driving electrodes and a plurality of sensing electrodes; a driving circuit unit applying one of a driving signal and a scanning signal having a frequency different from that of the driving signal, to each of the plurality of driving electrodes; a sensing circuit unit measuring a change in capacitance of a plurality of node capacitors generated in intersections of the plurality of driving electrodes and the plurality of sensing electrodes; and a calculation unit determining a touch based on a change in the capacitance, wherein when the scanning signal is applied to the plurality of driving electrodes, the calculation unit calculates capacitance deviations in the plurality of node capacitors from the deviations of changes in the capacitance generated by the plurality of node capacitors.

主权项

1. A touch sensing apparatus comprising:
a panel unit including a plurality of driving electrodes and a plurality of sensing electrodes; a driving circuit unit applying, at different times, a driving signal and a scanning signal having a frequency different from that of the driving signal to each of the plurality of driving electrodes; a sensing circuit unit measuring a change in capacitance of a plurality of node capacitors in intersections of the plurality of driving electrodes and the plurality of sensing electrodes; and a calculation unit determining a touch based on the change in the capacitance, the calculation unit calculating compensation data based on capacitance deviations generated in the plurality of node capacitors by the scanning signal having a different frequency than the driving signal, wherein the scanning signal has a frequency lower than that of the driving signal.