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ACTIVE PEN FOR MATRIX SENSOR

  • US 20150177868A1
  • Filed: 12/20/2013
  • Published: 06/25/2015
  • Est. Priority Date: 12/20/2013
  • Status: Active Grant
First Claim
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1. An input device comprising:

  • a plurality of sensor electrodes organized into a plurality of sets; and

    a processing system configured to drive the plurality of sensor electrodes with modulated signals having a first frequency, wherein the processing system comprises;

    a first plurality of receivers coupled to the plurality of sensor electrodes, wherein the first plurality of receivers are configured to obtain first resulting signals comprising effects corresponding to the modulated signals; and

    a second plurality of receivers, wherein each receiver of the second plurality of receivers is coupled to an associated set of the plurality of sensor electrodes and configured to obtain second resulting signals comprising effects corresponding to active signals having a second frequency;

    wherein the processing system is configured to demodulate the first resulting signals based on the first frequency of the modulated signals and the second resulting signals based on the second frequency, wherein the second frequency is different than the first frequency.

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