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CAPACITIVE MULTI-TOUCH SYSTEM AND METHOD OF CONTROLLING THE SAME

  • US 20140152614A1
  • Filed: 11/25/2013
  • Published: 06/05/2014
  • Est. Priority Date: 12/03/2012
  • Status: Active Grant
First Claim
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1. A capacitive multi-touch system, comprising:

  • a touch sensor panel configured to generate a capacitance signal corresponding to a touch input;

    a front-end circuit configured to convert the capacitance signal to a sensing channel signal; and

    a digital signal processor configured to;

    receive a common voltage (VCOM) from a display device,calculate a noise interval of two neighboring noise peaks of the common voltage, andperform a noise filtering operation on the sensing channel signal using a noise filter path,wherein the noise filter path is selected from a plurality of noise filter paths based on the noise interval.

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