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CONTACT DETECTING DEVICE, DISPLAY DEVICE, AND CONTACT DETECTING METHOD

  • US 20100085324A1
  • Filed: 09/15/2009
  • Published: 04/08/2010
  • Est. Priority Date: 10/08/2008
  • Status: Active Grant
First Claim
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1. A contact detecting device comprising:

  • n driving electrodes that are arranged in a scanning direction;

    a detection drive scanning unit that selects continuous m (2≦

    m<

    n) driving electrodes out of the n driving electrodes, simultaneously AC-drives the selected m driving electrodes, and repeats shift operation for changing selection targets of the m driving electrodes in the scanning direction such that one or more driving electrodes common before and after the shift operation performed each time are included in the selection targets;

    plural detection electrodes that form capacitors, between which and the respective n driving electrodes capacitors are formed;

    plural detection circuits that are connected to the plural detection electrodes and compare potentials of the detection electrodes corresponding thereto with a predetermined threshold every time the detection drive scanning unit performs the shift operation.

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