US 12,309,548 B2
Air-pulse generating device with efficient propagation
Jemm Yue Liang, Sunnyvale, CA (US); Jye Ren, Taipei (TW); and Lei Chen, Hayward, CA (US)
Assigned to xMEMS Labs, Inc., Santa Clara, CA (US)
Filed by xMEMS Labs, Inc., Santa Clara, CA (US)
Filed on May 22, 2023, as Appl. No. 18/321,752.
Application 18/321,752 is a continuation in part of application No. 17/553,806, filed on Dec. 17, 2021, granted, now 11,758,335.
Claims priority of provisional application 63/137,479, filed on Jan. 14, 2021.
Claims priority of provisional application 63/138,449, filed on Jan. 17, 2021.
Claims priority of provisional application 63/139,188, filed on Jan. 19, 2021.
Claims priority of provisional application 63/142,627, filed on Jan. 28, 2021.
Claims priority of provisional application 63/143,510, filed on Jan. 29, 2021.
Claims priority of provisional application 63/171,281, filed on Apr. 6, 2021.
Claims priority of provisional application 63/346,848, filed on May 28, 2022.
Claims priority of provisional application 63/347,013, filed on May 30, 2022.
Claims priority of provisional application 63/353,588, filed on Jun. 18, 2022.
Claims priority of provisional application 63/353,610, filed on Jun. 19, 2022.
Claims priority of provisional application 63/354,433, filed on Jun. 22, 2022.
Claims priority of provisional application 63/428,085, filed on Nov. 27, 2022.
Claims priority of provisional application 63/433,740, filed on Dec. 19, 2022.
Claims priority of provisional application 63/434,474, filed on Dec. 22, 2022.
Claims priority of provisional application 63/435,275, filed on Dec. 25, 2022.
Claims priority of provisional application 63/436,103, filed on Dec. 29, 2022.
Claims priority of provisional application 63/447,758, filed on Feb. 23, 2023.
Claims priority of provisional application 63/447,835, filed on Feb. 23, 2023.
Claims priority of provisional application 63/459,170, filed on Apr. 13, 2023.
Prior Publication US 2023/0300539 A1, Sep. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04R 23/00 (2006.01); H04R 7/04 (2006.01)
CPC H04R 23/00 (2013.01) [H04R 7/04 (2013.01); H04R 2440/07 (2013.01)] 29 Claims
OG exemplary drawing
 
1. 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.