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Method and system for detecting touch events based on redundant validation

  • US 8,730,213 B2
  • Filed: 07/02/2007
  • Issued: 05/20/2014
  • Est. Priority Date: 07/02/2007
  • Status: Active Grant
First Claim
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1. A method of detecting a touch event on an acoustic fingerprint based touch system, comprising:

  • digitizing first signals from at least a first sensor to form a first set of digitized signals and second signals from at least a second sensor to form a second set of digitized signals, wherein the at least first and second sensors are associated with a touch panel;

    performing a frequency transform upon the first set of digitized signals and the second set of digitized signals to form respectively first and second frequency transform data sets of frequency components;

    constructing from a touch a first live fingerprint and a second live fingerprint, wherein at least the first live fingerprint is based on the first and second frequency transform data sets and is gauge-invariant such that how the touch occurs minimally impacts the first live fingerprint; and

    identifying the location of the touch based on the first and second live fingerprints.

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