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:
Jan. 20, 2004
Filed:
Apr. 12, 2000
Applicant:
Inventors:
Shinichi Naohara, Kawagoe, JP;
Takeshi Sato, Kawagoe, JP;
Hitoshi Yamazaki, Kawagoe, JP;
Norio Matsuda, Kawagoe, JP;
Morio Nozaki, Kawagoe, JP;
Assignee:
Pioneer Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 ;
U.S. Cl.
CPC ...
G11B 7/00 ;
Abstract
A tilt servo apparatus of an optical disc recording/reproducing apparatus, which includes sampling portion for sampling an RF envelope signal at every predetermined rotational angle on the basis of a rotation signal being synchronous with a rotation of the optical recording medium, calculating portion for calculating an average value of the sampled envelope intensities, and control portion for controlling a tilt error correction. The control portion determines the amount of the tilt error correction on the basis of the average value.