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:
Nov. 16, 2010
Filed:
Dec. 19, 2007
Applicant:
Shinya Hatano, Osaka, JP;
Inventor:
Shinya Hatano, Osaka, JP;
Assignee:
Funai Electric Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Both of two permanent magnets which are arranged in an objective lens driving device are multipole magnetized magnets having rectangular parallelepiped shapes. The two permanent magnets have inverse N-S polarity at a part of surfaces which face each other. Focusing coils and tracking coils which are set up on a lens holder are disposed such that effective portions which are sides of the respective coils that face each other to generate driving force by electromagnetic force action with the permanent magnets, act with different direction magnetic fields respectively.