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Touch input method and apparatus for recognizing and distinguishing finger contact on a touch sensing surface

  • US 9,081,489 B2
  • Filed: 11/05/2010
  • Issued: 07/14/2015
  • Est. Priority Date: 11/05/2009
  • Status: Active Grant
First Claim
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1. A touch input method comprising:

  • receiving a touch input signal corresponding to a finger from a touch-sensing device;

    detecting a contact area between the touch-sensing device and the finger corresponding to the received touch input signal; and

    recognizing the finger corresponding to the received touch input signal based on a curvature value of the contact area and an axis corresponding to a longest diameter in the contact area as a reference line,wherein the reference line asymmetrically divides the contact area into a left half area and a right half area, andwherein the finger is recognized as a left thumb or a right thumb by comparing a size of the left half area and a size of the right half area.

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