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:
Dec. 14, 2010
Filed:
Sep. 30, 2008
Applicant:
Jun Ota, Utsunomiya, JP;
Inventor:
Jun Ota, Utsunomiya, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 41/09 (2006.01); H01L 41/22 (2006.01); G03B 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A driving device includes a plurality of laminated units formed by alternately stacking piezoelectric element layers and electrode layers, a failure detecting unit configured to detect failure of the laminated units, a plurality of switches provided corresponding to the laminated units and configured to enable and disable current supply to the laminated units, and a driving circuit configured to supply a current for driving to a normal laminated unit of the laminated units, on the basis of an output from the failure detecting unit.