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:
Dec. 20, 2011
Filed:
Nov. 17, 2006
Akira Mashimo, Tokorozawa, JP;
Akira Mashimo, Tokorozawa, JP;
TEAC Corporation, Tama-shi, Tokyo, JP;
Abstract
An optical disk apparatus for performing ROPC. A controller of the optical disk apparatus detects the quantity of reflected light Bo acquired when OPC is performed to set initial recording power Po; computes recording power P such that Bo/Po=B/Pis achieved in relation to the quantity of reflected light B acquired during recording of data; and computes next recording power Pr by use of a coefficient α by means of Pr=(1−α)·Pc+α·P in relation to current recording power Pc, to thus control recording power. The coefficient α is set to 0<α<1, thereby suppressing fluctuations and divergence of recording power. The coefficient α is dynamically set according to a parameter 'n.'