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Touch sensor system

  • US 8,970,538 B2
  • Filed: 12/19/2012
  • Issued: 03/03/2015
  • Est. Priority Date: 12/21/2011
  • Status: Active Grant
First Claim
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1. A touch sensor system, comprising:

  • detection means for detecting a hand-placing region which is a region of a touch panel including a plurality of capacitors provided in a matrix manner and on which region a hand is placed in order to make an input with a stylus, said detecting being based on strengths of capacitance signals, each strength being indicative of a change in the corresponding capacitor;

    replacing means for replacing values of capacitance signals corresponding to respective capacitors provided in the hand-placing region detected by the detection means with a nil value indicative of a state where no touch input is made; and

    stylus input recognition means for outputting to a host device coordinates of the input with a stylus on a basis of (i) the capacitance signals replaced with said nil value by the replacing means and (ii) a capacitance signal corresponding to a capacitor provided outside the hand-placing region,the touch sensor system further comprising replacing region setting means for setting a replacing region where the values of the capacitance signals are replaced with said nil value, said setting being based on the hand-placing region detected by the detection means,the replacing region including (i) a horizontal region which includes the hand-placing region and which extends in a horizontal direction and (ii) a vertical region which includes the hand-placing region and which extends in a vertical direction, andthe replacing region setting means switching the replacing region between the horizontal region and the vertical region every frames during each of which the capacitance signal is read out from the touch panel.

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