×

Touch sensing apparatus

  • US 9,098,157 B2
  • Filed: 03/13/2013
  • Issued: 08/04/2015
  • Est. Priority Date: 12/28/2012
  • Status: Expired due to Fees
First Claim
Patent Images

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.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×