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. 07, 2007
Filed:
Apr. 11, 2005
Yusuke Kusaka, Utsunomiya, JP;
Yusuke Kusaka, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A drive controller of a lens apparatus including a first lens unit moving for performing manual focus and a second lens unit moving for performing auto-focus has a control device switchable between a first mode for performing an auto-focus control of the second lens unit and a second mode for making the second lens unit unmovable at a predetermined position. The control device has a third mode for controlling drive of the second lens unit, upon receiving a command for switching from the first mode to the second mode, so as to maintain a focus state of the lens apparatus, on the basis of positional information of the first lens unit. The controller moves to the second mode upon detecting that the second lens unit has reached the predetermined position in the third mode.