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. 09, 1999
Filed:
Jul. 22, 1997
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A reproducing apparatus for disk-shaped recording medium rotationally drives the disk-shaped recording medium at a particular speed to read information from a recording track disposed circumferentially to the center of the recording surface with information recorded at a constant linear velocity. A pickup means scans the recording track and generating a first reproduction signal. A first rotational drive control means rotates the disk-shaped recording medium at a constant linear velocity based on the reproduction signal, and a second rotational drive control means rotates the disk-shaped recording medium at a constant angular velocity. A rotational drive control means selection means selects the first rotational drive control means or the second rotational drive control means based on the position of the pickup means when reproducing the disk.