SYSTEM INCLUDING PIEZOELECTRIC CAPACITOR ASSEMBLY HAVING FORCE-MEASURING, TOUCH-SENSING, AND HAPTIC FUNCTIONALITIES
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United States of America Patent
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Issued Date -
Sep 12, 2024
app pub date -
May 15, 2024
filing date -
Jan 30, 2020
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Abstract
A system includes a piezoelectric capacitor assembly and signal processing circuitry coupled to the piezoelectric capacitor assembly. The piezoelectric capacitor assembly includes a piezoelectric member and piezoelectric capacitors located at respective lateral positions along the piezoelectric member. Each piezoelectric capacitor includes: (1) a respective portion of the piezoelectric member, (2) a first electrode, and (3) a second electrode. The first and second electrodes are positioned on opposite side of the piezoelectric member. The piezoelectric capacitors include piezoelectric force-measuring elements (PFEs). The PFEs are configured to output voltage signals between the respective first electrode and the respective second electrode in accordance with a time-varying strain at the respective portion of the piezoelectric member between the respective first electrode and the respective second electrode resulting from a low-frequency mechanical deformation. The signal processing circuitry is configured to read at least some of the PFE voltage signals.
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