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. 11, 2003
Filed:
Feb. 27, 2001
Takashi Sasaki, Kawagoe, JP;
Takashi Suzuki, Kawagoe, JP;
Takao Shimamura, Kawagoe, JP;
Shinya Honjou, Kawagoe, JP;
Kenichi Takahashi, Kawagoe, JP;
Yoshihiro Hashizuka, Kawagoe, JP;
Koichi Kikuchi, Kawagoe, JP;
Hideaki Yoshimura, Kawagoe, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
A servo control apparatus of an optical pickup is provided for reading recorded information from a recording medium and generates a read signal. The apparatus includes an error signal extracting part for extracting an error signal which indicates a deviation amount of a reading position from a target reading position of the optical pickup; a drive part for driving the optical pickup to change the reading position; an equalizer for equalizing the error signal and supplying a drive signal which indicates a driving amount of the drive part; a detecting part for detecting a dropout portion in the read signal; an identifying part for identifying a form of the dropout portion detected in the detecting part; and a controller. The controller performs control to change a gain of the equalizer in accordance with the identified form of the dropout portion.