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:
Aug. 22, 2023
Filed:
Nov. 08, 2021
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Hidetoshi Saito, Suwa-Gun Fujimi-Machi, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02N 2/10 (2006.01); H02N 2/00 (2006.01); H10N 30/80 (2023.01);
U.S. Cl.
CPC ...
H02N 2/103 (2013.01); H02N 2/0075 (2013.01); H10N 30/802 (2023.02);
Abstract
A control method for a piezoelectric drive device having a vibrating portion including a piezoelectric element and a transmitting portion, synthesizing longitudinal vibration and flexural vibration by energization to the piezoelectric element to vibrate the vibrating portion and make elliptic motion of the transmitting portion, and moving a driven member by the elliptic motion of the transmitting portion, includes controlling a movement amount of the driven member by changing amplitude of the longitudinal vibration with amplitude of the flexural vibration kept constant.