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US 2023/0054412 A1Published application
Active piezoelectric sheet with piezoelectric microstructures
AssigneeMassachusetts Institute of Technology
InventorsJinchi HAN, Jeffrey H. LANG, Vladimir BULOVIC
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Abstract
An active acoustic system includes a thin-film sheet having an array of piezoelectric microstructures embossed in the film. Each piezoelectric microstructure may act as a speaker and/or a microphone. A control circuit is configured to individually address the piezoelectric microstructures to provide a separate voltage signal to, or receive a separate voltage signal from, each piezoelectric microstructure.
Claims25
An active acoustic system comprising:
- a piezoelectric substrate comprising an array of piezoelectric microstructures, each piezoelectric microstructure having at least two terminals;
- and
- a control circuit having output terminals coupled to at least one terminal of each piezoelectric microstructure, the control circuit configured to address one or more piezoelectric microstructures in the array of piezoelectric microstructure to provide one or more voltage signals to the piezoelectric microstructures to control the piezoelectric microstructures in the array of piezoelectric microstructures.
An active acoustic surface comprising:
- a substrate having an array of piezoelectric microstructures, each piezoelectric microstructure having at least one electrical terminal for coupling to a driver circuit;
- and
- a protective layer disposed on one side of the substrate, the protective layer comprising an array of through holes, each through hole in the array of through holes positioned over a piezoelectric microstructure of the array of piezoelectric microstructures.
Dependencies are inferred from the claim text.