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Touch panel device, portable terminal, position detecting method, and recording medium

  • US 10,474,302 B2
  • Filed: 12/08/2017
  • Issued: 11/12/2019
  • Est. Priority Date: 02/09/2012
  • Status: Active Grant
First Claim
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1. A touch panel device, comprising:

  • a touch panel configured to detect a touch input, the touch panel including a plurality of electrodes; and

    circuitry configured to;

    determine a detection range of an object approaching the touch panel based on an output distribution of capacitance values from the touch panel, the detection range being within a surface area of the touch panel;

    determine a first length of the detection range, the first length being a length of the detection range on an edge of the touch panel where the detection range of the object and the edge of the touch panel intersect;

    determine a second length of the detection range, the second length being a length of the detection range in a direction substantially parallel to the edge of the touch panel within the surface area of the touch panel;

    compare the first length with the second length; and

    determine an input operation corresponding to the object to be invalid in response to determining that the first length is equal to or larger than the second length.

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