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:
Apr. 20, 2010
Filed:
Oct. 25, 2005
Applicants:
Masatoshi Yajima, Osaka, JP;
Akihiro Sakaguchi, Osaka, JP;
Inventors:
Masatoshi Yajima, Osaka, JP;
Akihiro Sakaguchi, Osaka, JP;
Assignee:
Panasonic Corporation, Kadoma, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical information read/write apparatus according to the present invention includes: a light sourcethat emits a laser beam to access an information storage medium optically; a laser driverfor supplying drive current to a semiconductor laser as the light sourcean RE superimposed current generatorfor adding RE superimposed current to the drive current; a temperature sensorfor detecting a temperature around the light sourceand a control section for switching the values of the RE superimposed current according to the temperature detected.