US 12,015,896 B2
Piezoelectric speaker
Yu Shen, Shenzhen (CN); Qiang Dan, Shenzhen (CN); Yiwei Zhou, Shenzhen (CN); Shiyang Cheng, Shenzhen (CN); and Yang Li, Shenzhen (CN)
Assigned to AAC KAITAI TECHNOLOGIES (WUHAN) CO., LTD, Wuhan (CN)
Filed by AAC Kaitai Technologies (Wuhan) CO., LTD, Hubei (CN)
Filed on Aug. 4, 2022, as Appl. No. 17/880,695.
Claims priority of application No. 202210060171.8 (CN), filed on Jan. 19, 2022.
Prior Publication US 2023/0232160 A1, Jul. 20, 2023
Int. Cl. H04R 17/00 (2006.01)
CPC H04R 17/00 (2013.01) 11 Claims
OG exemplary drawing
 
1. A piezoelectric speaker, including:
a substrate with a cavity therethrough;
a supporting structure covering the cavity;
a first drive structure stacked on the supporting structure, including alternately stacked first electrode layers and first piezoelectric layers;
a transmission structure stacked on the first drive structure;
a separation slot penetrating the supporting structure and the first drive structure to separate the first drive structure into a first piezoelectric driving part and a second piezoelectric driving part; wherein
a rigidity of the transmission structure is less than or equal to a rigidity of the first drive structure, and the rigidity of the first drive structure is less than or equal to a rigidity of the supporting structure.