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. 08, 2006
Filed:
Aug. 01, 2003
Tetsuya Shihara, Kadoma, JP;
Tatsuya Takeuchi, Yawata, JP;
Kenji Fujiune, Takatsuki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An optical disc drive according to the present invention can read and write data from/on an optical discincluding record tracks to write data thereon and guide tracks for guiding a light beam. The drive includes: an optical pickupwith a converging optical system to focus the light beamand form a spot thereof on the optical discfor reading or writing the data; a tracking control section for controlling the converging optical system of the optical pickupsuch that the light beam spotfollows a selected track on the optical discrotating; and a control unitfor operating the tracking control section in a first mode or in a second mode. In the first mode, the tracking control section makes the light beam spotfollow the recording tracks. In the second mode, the tracking control section makes the light beam spotfollow the guide tracks.