Multiple fingers contact sensing method for emulating mouse buttons and mouse operations on a touch sensor pad

  • US 5,825,352 A
  • Filed: 02/28/1996
  • Issued: 10/20/1998
  • Est. Priority Date: 01/04/1996
  • Status: Expired due to Term
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First Claim
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1. A method for detecting the operative coupling of multiple fingers to a touch sensor involving the steps ofscanning the touch sensor to (a) identify a first maxima in a signal corresponding to a first finger, (b) identify a minima following the first maxima, (c) identify a second maxima in a signal corresponding to a second finger following said minima, andproviding an indication of the simultaneous presence of two fingers in response to identification of said first and second maxima.

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