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. 07, 2010
Filed:
Nov. 13, 2006
Masaya Kuwahara, Hyogo, JP;
Masaya Kuwahara, Hyogo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
It is an optical disk apparatus that comprises: a laser drive device for outputting a test power larger than a prescribed value in a gap section; an optical pickup for forming a beam spot on a disk and detecting reflected light; a focus error detector for detecting position shift between a recording face of the information recording medium and the beam spot; a focus control device for controlling the position shift; and a focus drive device for driving an objective lens in directions far from and close to the disk, wherein, in the gap section, the focus drive device keeps a focus drive output level of right before the laser drive device outputs the test power, and sets a recording power such that the emitted light power becomes the prescribed value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile