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DIRECTIONAL CAPACITIVE PROXIMITY SENSOR

  • US 20120139562A1
  • Filed: 12/01/2011
  • Published: 06/07/2012
  • Est. Priority Date: 12/01/2010
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • detecting an object near an electronic system that includes an electrically conductive medium forming a shield, an electrically insulating medium on the electrically conductive medium, and electrodes around a central area and on the electrically insulating medium, the detecting including;

    determining measurements representative of a capacitance on the electrodes;

    comparing the measurements with a detection threshold; and

    deducing whether an object is near the central area in a detection field based on the comparing,wherein the determining includes simultaneously activating all the electrodes.

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