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Self-capacitive touch control apparatus and control method thereof

  • US 9,354,739 B2
  • Filed: 10/16/2013
  • Issued: 05/31/2016
  • Est. Priority Date: 10/16/2012
  • Status: Active Grant
First Claim
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1. A control method for a self-capacitive touch control apparatus, the self-capacitive touch control apparatus comprising a plurality of electrodes, the control method comprising:

  • a) detecting capacitance changes in the electrodes to generate sensing results;

    b) calculating a total sensing amount according to the sensing results, and determining a number of touch points according to the total sensing amount;

    c) grouping the sensing results according to the number of touch points to generate a grouping result; and

    d) generating position information of one or more touch points corresponding to the number of touch points according to the grouping result and the sensing results,wherein the number of touch points is determined by comparing the total sensing amount to a predetermined upper threshold and a predetermined lower threshold.

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