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:
Feb. 14, 2023
Filed:
Dec. 12, 2018
Tdk Corporation, Tokyo, JP;
Yoshikazu Shimura, Tokyo, JP;
Kaoru Kijima, Tokyo, JP;
Hideya Sakamoto, Tokyo, JP;
Kazushi Tachimoto, Tokyo, JP;
Ryuhei Sasaki, Tokyo, JP;
Yoshiki Ohta, Tokyo, JP;
Akihiro Takeda, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
In a piezoelectric element, shift of a resonance point to a low-pitched sound side is achieved. A resonance point of a piezoelectric element moves to a low-pitched sound side when an active region is configured to be surrounded by an inactive region as in the configuration of the piezoelectric element. According to the piezoelectric element whose resonance point is moved to a low-pitched sound side, the piezoelectric element can realize a sound pressure that is sufficiently high for practical use when it is applied to an acoustic device.