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. 30, 2020
Filed:
Sep. 14, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Yuki Oda, Yokohama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A control method for a vibration-type actuator which prevents the vibration-type actuator from becoming inoperable during operation. To drive the vibration-type actuator when a load for moving a vibrating body and a driven body relatively to each other is relatively high, a first frequency falling within a frequency range including a frequency at which thrust of the vibration-type actuator reaches its peak is set as a starting frequency of AC voltage applied to an electro-mechanical energy conversion element of the vibrating body. To drive the vibration-type actuator when the load is relatively low, a third frequency lower than the first frequency and higher than a second frequency is set as the starting frequency, the second frequency being a frequency at which a moving speed at which the driving body and the driven body move relatively to each other reaches its peak.