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:
Nov. 21, 2023
Filed:
Nov. 24, 2021
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Kiichi Kajino, Matsumoto, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02N 2/10 (2006.01); H02N 2/00 (2006.01);
U.S. Cl.
CPC ...
H02N 2/103 (2013.01); H02N 2/004 (2013.01); H02N 2/0075 (2013.01);
Abstract
A method for sensing an abnormality of a piezoelectric drive device is a method for sensing a vibration abnormality of the piezoelectric drive device having a substrate and thin-film piezoelectric elements placed on the substrate and controlling amplitude of the piezoelectric elements using a drive control signal, and the method includes sensing the vibration abnormality by a drive voltage corresponding to the drive control signal.