Dispersion-Based Acoustic Touch Signal Detection and Reflector-Based Dispersion Mitigation
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United States of America Patent
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Issued Date -
Jun 13, 2013
app pub date -
Dec 12, 2011
filing date -
Dec 12, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of detecting a touch event includes transmitting acoustic signals across a substrate, and receiving the acoustic signals. The received acoustic signals have a waveform profile with a dip indicative of a touch on the substrate. The method further includes determining a dispersion level of the dip from the waveform profile, and determining a location coordinate of the touch on the substrate based on the dispersion level.
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