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. 22, 2006
Filed:
Aug. 29, 2002
Naoto Takeda, Tokyo, JP;
Naoto Takeda, Tokyo, JP;
TEAC Corporation, Musashino, JP;
Abstract
The present invention provides a data-recordable optical disk device. Test data is recorded in a predetermined area of an optical disk while varying recording power level, and an optimum recording power level is selected based on reproduced signal quality of the test data. When the optimum recording power level does not exceed an allowable recording power level of the laser diode, data is recorded at that optimum recording power level. When the optimum recording power level exceeds the allowable recording power level of the laser diode, the recording strategy is changed to a low-power strategy. A low-power strategy is, for example, a strategy having an increased recording pulse width compared to that of a standard strategy. An optimum recording power level is selected for the low-power strategy, and data is subsequently recorded.