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:
May. 09, 2000
Filed:
Apr. 13, 1998
Toshihiro Shigemori, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An optical disk drive includes a first detection unit which detects a first time signal and a first error signal, the first time signal indicating a time code of pregrooves of a recordable optical disk, the first error signal being indicative of an error of the first time signal. A second detection unit detects a second time signal and a second error signal, the second time signal indicating a time code of recorded data of the disk, the second error signal being indicative of an error of the second time signal. A time determination unit determines the first time signal as being a current time when no error of the first time signal is indicated by the first error signal, and determines the second time signal as being the current time when an error of the first time signal is indicated by the first error signal and no error of the second time signal is indicated by the second error signal. A comparator detects whether the determined current time matches with a target time. An encoder starts writing data to the disk when a coincidence of the determined current time and the target time is detected.