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:
Jul. 06, 1999
Filed:
Jun. 03, 1997
Applicant:
Inventors:
Tomomichi Tamura, Fukuoka, JP;
Kiyoyuki Suenaga, Kasuga, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 50 ; 369 48 ;
Abstract
An apparatus for reproducing data from the optical disk at a constant linear velocity includes a specified rotation speed detection module which decides whether or not the optical disk is rotating at a specified rotation speed. A linear velocity calculation module arithmetically determines the linear velocity by measuring a time taken for a complete rotation of the optical disk at a start position of a data area on the optical disk when the optical disk is detected as rotating at a specified rotation speed.