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Method, touch sensing apparatus and computer-readable recording medium for minimizing noise on touch panel

  • US 9,223,437 B2
  • Filed: 03/12/2013
  • Issued: 12/29/2015
  • Est. Priority Date: 03/28/2012
  • Status: Active Grant
First Claim
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1. A method for minimizing noise on a touch panel including a plurality of drive lines and a plurality of sensing lines, wherein the drive lines and the sensing lines cross each other, the method comprising:

  • performing a first dummy scan at least one time, in which a signal from the sensing lines is sensed in a state where a driving signal is not applied to the drive lines;

    performing a second dummy scan at least one time when a magnitude of a signal obtained through the first dummy scan is greater than a first threshold;

    comparing a second threshold with a magnitude of a signal obtained through the second dummy scan, and estimating noise in a first frequency band;

    when the magnitude of the signal obtained through the second dummy scan is less than or equal to the second threshold, performing the first dummy scan again; and

    when the magnitude of the signal obtained through the second dummy scan is less than or equal to the second threshold and a number of repetition times of the first dummy scan is greater than or equal to a threshold number, performing frequency hopping which changes a frequency of a driving signal.

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