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:
Nov. 30, 1999
Filed:
Aug. 29, 1997
Applicant:
Inventor:
Satoshi Itoi, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 32 ; 369 54 ;
Abstract
A method of scanning an optical disk having a land area and a groove area arranged in a double spiral configuration is disclosed. Either the land area or the groove area is continuously scanned radially inward or radially outward. The groove area, if the land area is so scanned first, or the land area, if the groove area is so scanned first, is scanned with a track jump repeated outward or inward from the end of the previous scanning. In this manner, one of the land area and groove area is subjected to continuous scanning without any track jump while the other area is subjected to scanning causing a track jump to occur within the same area.