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Low pin count solution using capacitance sensing matrix for keyboard architecture

  • US 20070273560A1
  • Filed: 05/25/2006
  • Published: 11/29/2007
  • Est. Priority Date: 05/25/2006
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • assigning a plurality of keyboard keys into pre-defined areas of a sensing device having a plurality of sensor elements and a plurality of capacitance sensing pins to couple the sensing device to a processing device;

    detecting a presence of a conductive object on the sensing device;

    determining a position of the presence of the conductive object on the sensing device; and

    selecting a keyboard key of the plurality of keyboard keys based on the position of the presence of the conductive object and the pre-defined areas of the sensing device.

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