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:
May. 30, 2023
Filed:
Apr. 15, 2021
Canon Kabushiki Kaisha, Tokyo, JP;
Akira Shimada, Saitama, JP;
Akio Atsuta, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A drive control device, which controls driving of a vibration type actuatorincluding a vibratorthat includes a piezoelectric element, and a rotor, includes amplifier circuitsandamplifying a power supply voltage to generate a drive voltage to be applied to the piezoelectric element, and a microcomputer unit. The microcomputer unitperforms a control to increase the amplitude of the drive voltage to perform acceleration from when the vibration type actuatoris started to when a target speed of the rotoris reached, decrease the frequency of the drive voltage without changing the amplitude of the drive voltage when power supplied to the piezoelectric elementexceeds a first power limit P-Lim, and increase the amplitude of the drive voltage when the power falls below a second power limit P-Limduring an operation of decreasing the frequency.