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Methods and apparatus for capacitive sensing

  • US 10,001,885 B2
  • Filed: 05/12/2014
  • Issued: 06/19/2018
  • Est. Priority Date: 10/24/2008
  • Status: Active Grant
First Claim
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1. An electronic device comprising:

  • a plurality of capacitive sensor electrodes, wherein each capacitive sensor electrode in the plurality of capacitive sensor electrodes is disposed at a different location across a surface of the electronic device; and

    first sensing circuitry, wherein the first sensing circuitry is configured to detect a contact location of a touch at the surface of the electronic device held at a first potential using the plurality of capacitive sensor electrodes, wherein the first sensing circuitry is configured to detect a capacitance indicative of a proximity between an external source of electric potential and the surface of the electronic device at a second floating potential using the plurality of capacitive sensor electrodes.

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