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Proximity and multi-touch sensor detection and demodulation

  • US 20080158172A1
  • Filed: 01/03/2007
  • Published: 07/03/2008
  • Est. Priority Date: 01/03/2007
  • Status: Active Grant
First Claim
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1. An apparatus for detecting multi-touch events and hover events with a touch-sensitive surface, comprising:

  • a plurality of touch sensors configured for detecting one or more touch events at the touch-sensitive surface, each touch event comprising a touching of an object against the touch-sensitive surface;

    one or more proximity sensors configured for detecting at least one hover event spaced from the touch-sensitive surface, each hover event comprising a hovering of an object near the touch-sensitive surface but outside a near-field detection capability of a touch sensor; and

    one or more event detection and demodulation circuits couplable to the plurality of touch sensors and the one or more proximity sensors, the one or more event detection and demodulation circuits configurable for generating distinct values representative of multiple detected touch events occurring at distinct locations at about the same time, or representative of a detected hover event.

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