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:
Aug. 27, 2002
Filed:
Aug. 31, 1999
Yoshitaka Shimoda, Tokorozawa, JP;
Masayoshi Yoshida, Tokorozawa, JP;
Naoharu Yanagawa, Tokorozawa, JP;
Pioneer Corporation, Tokyo-to, JP;
Abstract
An information recording apparatus (S) records record information onto an optical disc ( ), which corresponds to a CLV (Constant Linear Velocity) method to keep a linear velocity of the optical disc constant when reproducing the record information from the optical disc. The information recording apparatus is provided with: an optical pickup ( ) having a laser ( ) for irradiating a light beam (B) from the laser onto a record track of the optical disc and for detecting a reflected light from the optical disc; a rotation controlling device ( to ) for rotation-controlling the optical disc to keep a rotation angular velocity of the optical disc constant when recording the record information onto the optical disc; and a laser drive controlling device ( ) for obtaining an optimum value of a laser driving amount for the optical pickup in correspondence with a linear velocity of the record track of the rotation-controlled optical disc with respect to the optical pickup and for drive-controlling the laser by use of the obtained optimum value of the laser driving amount.