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:
Jun. 19, 2012
Filed:
Dec. 03, 2008
Akihiro Horiuchi, Fukuoka, JP;
Satsuki Norimatsu, Fukuoka, JP;
Akira Yamamoto, Fukuoka, JP;
Yuichiro Sakane, Fukuoka, JP;
Akihiro Horiuchi, Fukuoka, JP;
Satsuki Norimatsu, Fukuoka, JP;
Akira Yamamoto, Fukuoka, JP;
Yuichiro Sakane, Fukuoka, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An optical pickup which has a failure prediction apparatus for predicting a failure of a laser diode has an input inputting a value of a current that flows through the laser diode and is measured at predetermined time intervals, a storage storing the current values inputted by said input, a detector detecting a current value that is a current value at any one of the measurement times of day stored in said storage and that has a change greater than or equal to a predetermined value relative to the current value at the preceding measurement time of day, and a generator generating a prediction curve that indicates a relationship between said elapsed time and the current value applicable at and after the measurement time of day of the current value detected by said detector.