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Apparatus and methods for detecting a conductive object at a location

DC
  • US 8,519,973 B1
  • Filed: 04/09/2012
  • Issued: 08/27/2013
  • Est. Priority Date: 05/18/2006
  • Status: Active Grant
First Claim
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1. A method comprising:

  • determining capacitance variations of a first number of two or more sense elements of a touch screen device using a processing device to detect a presence of a conductive object on any one of a second number of three or more button areas of the touch screen device, wherein the first number of sense elements is less than the second number of button areas; and

    recognizing an activation of one of the three or more button areas using the determined capacitance variations of the first number of two or more sense elements.

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