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US 12,309,548 B2Granted
Air-pulse generating device with efficient propagation
AssigneexMEMS Labs, Inc.
InventorsJemm Yue Liang, Jye Ren, Lei Chen
Life of this patent
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Abstract
An air-pulse generating device includes a film structure. The film structure is actuated such that the air-pulse generating device produces a plurality of air pulses. A horn-shaped outlet is formed within the air-pulse generating device, and the plurality of air pulses is propagated via the horn-shaped outlet.
Claims29
An air-pulse generating device, comprising:
- a film structure, comprising a flap pair;
- wherein the film structure is actuated such that the air-pulse generating device produces a plurality of air pulses at an ultrasonic pulse rate;
- wherein a horn-shaped outlet is formed within the air-pulse generating device, and the plurality of air pulses is propagated via the horn-shaped outlet;
- wherein the flap pair comprises a first flap and a second flap opposite to each other;
- wherein the flap pair is configured to perform a differential mode movement and to form a virtual valve or an opening at an opening rate which is synchronous with the ultrasonic pulse rate;
- wherein a slit is formed between the first flap and the second flap, and the opening is formed because of the slit;
- wherein a projection of the horn-shaped outlet onto the film structure overlaps with the opening;
- wherein the virtual valve is closed within a period corresponding to a first transition time of the first flap and a second transition time of the second flap.
5 more elements
A subassembly, disposed or to be disposed within a device, comprising:
- a conduit, formed within the subassembly;
- wherein the conduit comprises a passageway and a horn-shaped outlet;
- wherein the subassembly is assembled or to be assembled with the device comprising a film structure;
- wherein the film structure comprises a flap pair;
- wherein the flap pair comprises a first flap and a second flap opposite to each other;
- wherein the flap pair is configured to perform a differential mode movement and to form a virtual valve or an opening at an opening rate which is synchronous with an ultrasonic carrier frequency;
- wherein a slit is formed between the first flap and the second flap, and the opening is formed because of the slit;
- wherein a projection of the horn-shaped outlet onto the film structure overlaps with the opening;
- wherein the virtual valve is closed within a period corresponding to a first transition time of the first flap and a second transition time of the second flap.
6 more elements
Dependencies are inferred from the claim text.