Patent ID: 8730213
Filing Date: 2014-05-20
Classification: G06F

Abstract:
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.