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:
Jun. 13, 2006
Filed:
Oct. 25, 2001
Applicant:
Toshikazu Kobayashi, Tokyo, JP;
Inventor:
Toshikazu Kobayashi, Tokyo, JP;
Assignee:
Sony Computer Entertainment Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A pull-in point setting circuitsets the intermediate value between the maximum value and minimum value of the focus error signal of a layeras the pull-in point of a focus servo action in advance of the playback of an optical disk. At a layer jump before the automatic adjustment of a focus bias, the focus servo action is pulled in at the set point. Thus, the layer jump can be reliably effected even before the adjustment of the focus bias.