SYSTEM AND METHOD FOR REDUCING VIBRATIONAL EFFECTS ON A FORCE-BASED TOUCH PANEL
First Claim
1. A method for reducing vibrational effects on a force-based touch panel, comprising:
- sensing a force applied to the touch panel using at least one force sensor to obtain at least one force sensor signal;
measuring a vibrational acceleration of the force-based touch panel to form an acceleration signal, wherein the vibrational acceleration adds a vibration induced signal to the at least one force sensor signal;
adaptively filtering the vibration induced signal from the at least one force sensor signal by adjusting filter characteristics of an adaptive vibration filter to remove substantially all of the vibration induced signal from the at least one force sensor signal to form at least one vibration-reduced force sensor signal;
calculating a location of the force applied to the touch panel from the at least one vibration-reduced force sensor signal; and
updating a user application based on the calculated location of the force.
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Accused Products
Abstract
A system and method for reducing vibrational effects on a force-based touch panel is disclosed. The system comprises at least one force sensor operable with the force-based touch panel to measure a force applied to the touch panel to provide at least one force sensor signal. An accelerometer operable with the force-based touch panel is used to sense a vibrational acceleration of the force-based touch panel to form an acceleration signal. The vibrational acceleration adds a vibration induced signal to the at least one force sensor signal. An adaptive vibration filter is used to adaptively filter the vibration induced signal from the at least one force sensor signal by adjusting filter characteristics of the adaptive vibration filter to remove substantially all of the vibration induced signal from the at least one force sensor signal.
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Citations
22 Claims
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1. A method for reducing vibrational effects on a force-based touch panel, comprising:
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sensing a force applied to the touch panel using at least one force sensor to obtain at least one force sensor signal; measuring a vibrational acceleration of the force-based touch panel to form an acceleration signal, wherein the vibrational acceleration adds a vibration induced signal to the at least one force sensor signal; adaptively filtering the vibration induced signal from the at least one force sensor signal by adjusting filter characteristics of an adaptive vibration filter to remove substantially all of the vibration induced signal from the at least one force sensor signal to form at least one vibration-reduced force sensor signal; calculating a location of the force applied to the touch panel from the at least one vibration-reduced force sensor signal; and updating a user application based on the calculated location of the force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for reducing vibrational effects on a force-based touch panel, comprising:
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at least one force sensor operable with the force-based touch panel to measure a force applied to the touch panel to provide at least one force sensor signal; an accelerometer operable with the force-based touch panel to sense a vibrational acceleration of the force-based touch panel to form an acceleration signal, wherein the vibrational acceleration adds a vibration induced signal to the at least one force sensor signal; an adaptive vibration filter that adaptively filters the vibration induced signal from the at least one force sensor signal by adjusting filter characteristics to remove substantially all of the vibration induced signal from the at least one force sensor signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for reducing vibrational effects on a force-based touch panel, comprising:
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means for sensing a force applied to the touch panel to obtain at least one force sensor signal; means for measuring a vibrational acceleration of the force-based touch panel to form an acceleration signal, wherein the vibrational acceleration adds a vibration induced signal to the at least one force sensor signal; means for adaptively filtering the vibration induced signal from the at least one force sensor signal to remove substantially all of the vibration induced signal from the at least one force sensor signal to form at least one vibration-reduced force sensor signal; means for calculating a location of the force applied to the touch panel from the at least one vibration-reduced force sensor signal; and means for updating a user application based on the calculated location of the force.
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Specification