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:
May. 19, 2009
Filed:
Nov. 23, 2004
Yukiyasu Tatsuzawa, Yokohama, JP;
Koichi Otake, Yokohama, JP;
Hideyuki Yamakawa, Kawasaki, JP;
Hiroyuki Moro, Ome, JP;
Toshihiko Kaneshige, Yokohama, JP;
Yukiyasu Tatsuzawa, Yokohama, JP;
Koichi Otake, Yokohama, JP;
Hideyuki Yamakawa, Kawasaki, JP;
Hiroyuki Moro, Ome, JP;
Toshihiko Kaneshige, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A disk device includes a reading section which reads reflected light and outputs a read signal according to the read reflected light, a processing section which calculates an adjustment value from the read signal, performs predetermined processing on the read signal based on the adjustment value, and outputs a process signal, a detecting section which detects a reading defect in the reading section based on the read signal, a determining section which determines signal quality of the process signal output from the processing section, a storage section which stores the adjustment value calculated by the processing section, in a memory area, based on a result output from the determining section, and a controller which, when the detecting section detects the reading defect, performs control so that the adjustment value is read out of the storage section and is supplied to the processing section.