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:
Feb. 29, 2000
Filed:
Nov. 04, 1998
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 54 ; 369116 ; 369 47 ;
Abstract
An optical disk device comprises a power ratio setting circuit for setting ratio of recording power to erasing power in a predetermined ratio, a recording start point detection circuit for detecting a recording start point by performing at least two cycle recording over the same area in a predetermined test region to detect a recording power and an erasing power of the recording start point, and a power setting circuit for setting a final recording power and erasing power for recording in a user region of the optical disk by multiplying the recording power and the erasing power of the recording start point by predetermined values respectively.