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US 12,356,141 B2Granted
Air-pulse generating device, wearable sound device, bladeless fan, and airflow producing method
AssigneexMEMS Labs, Inc.
InventorsJemm Yue Liang, JengYaw Jiang
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Abstract
An air-pulse generating device, a wearable sound device, bladeless fan, and an airflow producing method are disclosed. The air-pulse generating device includes a film structure, configured to be actuated to generate a plurality of air pulses at an ultrasonic pulse rate. The plurality of air pulses produces a net airflow toward one single direction.
Claims29
An air-pulse generating device, comprising:
- a film structure, comprising a flap pair, configured to be actuated to generate a plurality of air pulses at an ultrasonic pulse rate;
- 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 the plurality of air pulses produce a net airflow constantly toward one single direction;
- 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.
2 more elements
A wearable sound device, comprising:
- a housing;
- and
- an airflow generating device, configured to produce an airflow constantly toward one single direction;
- wherein the airflow generating device 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;
- 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.
4 more elements
A bladeless fan, comprising:
- a film structure, comprising a flap pair;
- wherein the bladeless fan produces a plurality of air pulses according to air pressure variation, and the plurality of air pulses are asymmetric;
- wherein the plurality of air pulses produced by the bladeless fan constitute net air movement or net airflow constantly toward one direction;
- 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;
- 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.
3 more elements
A method of producing airflow, comprising:
- producing a plurality of air pulses, by a film structure of an air-pulse generating device, at an ultrasonic pulse rate;
- wherein the plurality of air pulses produces a net airflow constantly toward a single direction;
- wherein the film structure comprises flap pair;
- wherein the flap pair comprises a first flap and a second flap opposite to each other;
- wherein the step of producing the plurality of air pulses comprises driving the flap pair to perform a differential mode movement so as to form a virtual valve or an opening at an opening rate which is synchronous with the ultrasonic pulse rate;
- 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.
3 more elements
Dependencies are inferred from the claim text.