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. 16, 2009
Filed:
Dec. 05, 2005
Kenji Nakao, Gifu, JP;
Noboru Mamiya, Daito, JP;
Ken Hirose, Higasiosaka, JP;
Sanyo Electric Co., Ltd., Moriguchi-shi, JP;
Abstract
An optimum power set value Pwpfor Layerobtained by an OPC is used as an initial value Pwof the OPC for Layer. At this time, an inclination Ia is obtained from an approximation line of a β value for Layer(recording power to the β value) obtained by the OPC. From the β value obtained by performing a test recording at the initial value Pwand the inclination Ia, an approximation line of a β value for Layer(recording power to the β value) is obtained. Then, on the obtained approximation line, a laser power for providing a target β value (βt) is obtained, and set as an optimum power Pwpfor Layer. Thus, an optimum power setting conforming to characteristics of a disc can be performed. As a result, setting the optimum power for Layercan be performed more smoothly and quickly.