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Coordinate input apparatus

  • US 8,838,410 B2
  • Filed: 08/15/2011
  • Issued: 09/16/2014
  • Est. Priority Date: 09/13/2010
  • Status: Active Grant
First Claim
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1. A coordinate input apparatus that calculates coordinates of a pointed position using four sensor units placed around a coordinate input region and constructed to emit light toward the coordinate input region and to receive light of the coordinate input region, the apparatus comprising:

  • an input unit constructed to input signals according to the received light; and

    a calculation unit constructed to calculate placement information of the four sensor units, using angle information of light received by the four sensor units,wherein the calculation unit is constructed to calculate the coordinates of the pointed position based on the placement information of the four sensor units and the light received by the four sensor units when the position in the coordinate input region is pointed.

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