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DRIFT COMPENSATION APPARATUS OF CAPACITIVE TOUCH PANEL AND DRIFT COMPENSATION METHOD THEREOF

  • US 20100214253A1
  • Filed: 04/28/2009
  • Published: 08/26/2010
  • Est. Priority Date: 02/25/2009
  • Status: Abandoned Application
First Claim
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1. A drift compensation method of a capacitive touch panel, wherein the capacitive touch panel has a plurality of sensors and comprises:

  • extracting a plurality of capacitances respectively sensed by each of the sensors;

    determining whether the capacitive touch panel is in a proximity state according to a slope of the sensed capacitances and a slope parameter;

    determining whether each of the capacitances is drifted according to each of the capacitances and an allowable noise range; and

    compensating each of the capacitances according to a drift error of each of the capacitances after a first presetting time when the capacitive touch panel is not in the proximity state and each of the capacitances is drifted.

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