US 11,057,716 B1
Sound producing device
Chiung C. Lo, San Jose, CA (US); Wen-Chien Chen, New Taipei (TW); Chun-I Chang, Hsinchu County (TW); and Jemm Yue Liang, Sunnyvale, CA (US)
Assigned to xMEMS Labs, Inc., Santa Clara, CA (US)
Filed by xMEMS Labs, Inc., Santa Clara, CA (US)
Filed on Jul. 2, 2020, as Appl. No. 16/920,384.
Claims priority of provisional application 62/954,237, filed on Dec. 27, 2019.
Int. Cl. H04R 19/02 (2006.01)
CPC H04R 19/02 (2013.01) [H04R 2201/003 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A sound producing device, comprising:
a base; and
at least one chip disposed on the base, the at least one chip comprising:
at least one membrane comprising a coupling plate and at least one spring structure connected to the coupling plate; and
at least one actuator configured to receive a driving signal corresponding to an input audio signal to actuate the at least one membrane, wherein the input audio signal and the driving signal have an input audio band which has an upper bound at a maximum frequency;
wherein the at least one spring structure is situated between the coupling plate and the at least one actuator, and the at least one membrane has a first resonance frequency higher than the maximum frequency;
wherein the coupling plate is actuated to move by the at least one actuator via the at least one spring structure.