Patent ID: 6366277
Filing Date: 2002-04-02
Classification: G06F

Abstract:
A method of operating an acoustic wave touchscreen, comprising the steps of:periodically measuring a first waveform for a first axis of said touchscreen and a second waveform for a second axis of said touchscreen; comparing said first waveform to a first baseline waveform; determining if said first waveform and said first baseline waveform are substantially equivalent; comparing said second waveform to a second baseline waveform; determining if said second waveform and said second baseline waveform are substantially equivalent; returning to an initial monitoring state if said first waveform and said first baseline waveform are substantially equivalent and if said second waveform and said second baseline waveform are substantially equivalent; and establishing a new touch if said first waveform and said first baseline waveform are not substantially equivalent or if said second waveform and said second baseline waveform are not substantially equivalent.