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:
Feb. 20, 1996
Filed:
Sep. 29, 1994
Applicant:
Inventor:
Fumikazu Nishikawa, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02N / ; G03B / ;
U.S. Cl.
CPC ...
310316 ; 354400 ;
Abstract
A driving device drives a movable member, such as a lens barrel, using a vibration motor through a gear train. The scanning speed of the driving frequency of a periodic signal applied to the motor when the motor is activated is varied according to a backlash of the gear train. In this manner, a movable member can be driven to effect a fine focus adjustment regardless of the existence or non-existence of a backlash in the gear train.
Nishikawa, Fumikazu. (1996). Lens driving device employing vibration motor with backlash compensation (U.S. Patent No. 5493163). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5493163
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile