Method and system for detecting touch events based on redundant validation
First Claim
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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Abstract
A method of detecting a touch event on an acoustic fingerprint based touch system comprises digitizing at least two signals to form first and second sets of digitized signals. The at least two signals are received from at least two sensors on a touch panel. A frequency transform is performed upon the first and second sets of digitized signals to form first and second frequency transform data sets of frequency components. At least first and second live fingerprints are constructed wherein at least one of the first and second live fingerprints is based on the first and second frequency transform data sets. A touch location is identified based on the at least first and second live fingerprints.
64 Citations
22 Claims
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1. A method of detecting a touch event on an acoustic fingerprint based touch system, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An acoustic fingerprint based touch system, comprising:
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a touch panel; at least two sensors interconnected with the touch panel, the at least two sensors obtaining at least two signals associated with the touch panel, the at least two sensors including a first sensor obtaining a first signal and a second sensor obtaining a second signal, the at least two signals including the first and second signals; and a processor module to perform frequency transforms based on the first signal to produce a first frequency transform signal and based on the second signal to produce a second frequency transform signal, the processor module constructing from a touch event at least two live fingerprints each based on the first and second frequency transform signals, the processor module determining coordinates associated with the touch event on the touch panel based on the at least two live fingerprints, wherein each of the at least two live fingerprints is gauge-invariant such that how the touch event occurs minimally impacts the at least two live fingerprints. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A non-transitory computer readable medium for use in an acoustic fingerprint based touch system, comprising:
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instructions to digitize signals from at least two sensors on a touch panel to form first and second sets of digitized signals, the at least two sensors including a first sensor and a second sensor, the first set of digitized signals associated with the first sensor and the second set of digitized signals associated with the second sensor; instructions to perform a frequency transform upon the first and second sets of digitized signals to form first and second frequency transform data sets of frequency components; instructions to construct for a touch event at least two live fingerprints each based on the first and second frequency transform data sets, wherein and each of the at least two live fingerprints is gauge-invariant such that how the touch event occurs minimally impacts the at least two live fingerprints; and instructions to determine the coordinates on the touch panel associated with the touch event based on the at least two live fingerprints. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification