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TOUCH-TYPE INPUT DEVICE

  • US 20100265211A1
  • Filed: 04/14/2010
  • Published: 10/21/2010
  • Est. Priority Date: 04/15/2009
  • Status: Abandoned Application
First Claim
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1. A touch-type input device comprising:

  • a plurality of sensor electrodes arranged in a first coordinate axis direction, each of which is configured such that its electrostatic capacitance changes according to the circumstances of how a user touches the sensor electrodes;

    a capacitance detection circuit configured to measure the electrostatic capacitances of the plurality of sensor electrodes, and to generate a first data array containing capacitance value data which represents the electrostatic capacitances thus measured;

    a peak detection unit configured to scan the first data array, to identify the sensor electrode which exhibits the largest capacitance value, and to generate first peak data which represents the sensor electrode thus identified; and

    a computation processing unit configured to reduce the value of the capacitance data of each sensor electrode arranged in a range within the capacitance data contained in the first data array so as to generate a second data array, with the range having been selected using the sensor electrode indicated by the first peak data as a reference,wherein the peak detection unit scans the second data array, identifies the sensor electrode which exhibits the largest capacitance value, and generates second peak data which represents the sensor electrode thus identified.

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