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EQUALIZED CAPACITIVE TOUCHPAD AND TOUCH POSITIONING METHOD

  • US 20130307822A1
  • Filed: 07/22/2013
  • Published: 11/21/2013
  • Est. Priority Date: 03/25/2008
  • Status: Active Grant
First Claim
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1. An equalized capacitive touchpad, comprising:

  • a touch sensor having a first sensing line in a first direction and a second sensing line in a second direction with a mutual capacitance therebetween;

    a front-end circuit coupled to the first sensing line and the second sensing line, detecting a variation of the mutual capacitance to generate a sensed value; and

    an equalizer coupled to the front-end circuit, determining an equalization value according to a position information defined by the first sensing line and the second sensing line, for correcting the sensed value.

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