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:
Oct. 03, 2006
Filed:
Sep. 10, 2002
Naoto Takeda, Tokyo, JP;
Naoto Takeda, Tokyo, JP;
Teac Corporation, Tokyo, JP;
Abstract
An optical disk device in which the laser light power for writing data onto an optical disk is optimized. Test data is written onto an optical disk while laser light power is varied and the laser light power is optimized based on the quality of replayed signals of the test data. The space value of the replayed signal of the test data is detected and, when the space value is a value which should not exist, it is judged that 3T mark period is missing or excessively written and the laser light power in which such a space value is obtained is removed from the candidates for the optimum laser light power. Also, jitter and error rate of the replayed signal are detected. Even when the jitter is at a desirable value, if the error rate is greater than or equal to a predetermined value, the laser light power in which such an error rate is obtained is removed from consideration as a possible optimum laser light power.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile