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:
Jul. 10, 2007
Filed:
Dec. 10, 2001
Kenji Asano, Kakamigahara, JP;
Hideaki Yano, Osaka, JP;
Koichi Tada, Gifu, JP;
Sanyo Electric Co., Ltd., Moriguchi-shi, JP;
Abstract
The invention provides a disk playback device wherein a disk () is irradiated with a laser beam from an optical head () to reproduce signals from the disk, and which comprises an external synchronizing signal producing circuit () and a delay circuit () for producing a reproduction synchronizing signal providing reference timing at which a reproduced signal is detected by reading an output signal from the optical head (), a circuit () for detecting the reproduced signal by reading the output signal from the optical head () based on the reproduction synchronizing signal, and a system controller () for determining an optimum phase for a normal reproduction operation by altering the phase of the reproduction synchronizing signal and executing a reproduction operation, the controller () being operable to make a phase adjustment for the reproduction synchronizing signal prepared by the delay circuit (). A normal reproduction operation can be performed at all times by assuring the reproduction synchronizing signal of the optimum phase.