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:
Oct. 15, 2013
Filed:
Jun. 07, 2011
Minoru Uchiyama, Utsunomiya, JP;
Minoru Uchiyama, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A control apparatus is configured to control an actuator, which moves one driven member by a plurality of vibrators, by supplying two alternating-current signals to each vibrator of the actuator. The control apparatus includes a controller configured to acquire a speed characteristic of the driven member corresponding to the frequency of the alternating-current signal with respect to the vibrator(s) based on the acquired speed and the frequency of the alternating-current signal supplied to the vibrator(s) at the time of the acquisition of the speed, and reduce a difference in the characteristic among the plurality of vibrators by adjusting at least one of an amplitude of an alternating-current signal to be supplied to the vibrator, a frequency of an alternating-current signal to be supplied to the vibrator, and a phase difference between two alternating-current signals to be supplied to the vibrator, based on the acquired characteristic.