The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 2021
Filed:
Feb. 05, 2019
Infineon Technologies Ag, Neubiberg, DE;
Stefan Barzen, Munich, DE;
INFINEON TECHNOLOGIES AG, Neubiberg, DE;
Abstract
According to an embodiment, a microspeaker includes an acoustic micropump structure configured to pump at a first frequency above an upper audible frequency limit. The acoustic micropump structure is further configured to generate an acoustic signal having a second frequency by adjusting the pumping. Adjusting the pumping includes adjusting a direction of pumping for the acoustic micropump structure according to the second frequency. Adjusting the direction of pumping includes changing a direction of flow of an elastic medium through the acoustic micropump structure from a first direction to a second direction. The second frequency is below the upper audible frequency limit.