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:
Dec. 26, 2006
Filed:
Jul. 07, 2004
Nobuhide Aoyama, Kawasaki, JP;
Ryota Akiyama, Kawasaki, JP;
Yasuaki Morimoto, Kawasaki, JP;
Tetsuo Hosokawa, Higashine, JP;
Nobuhide Aoyama, Kawasaki, JP;
Ryota Akiyama, Kawasaki, JP;
Yasuaki Morimoto, Kawasaki, JP;
Tetsuo Hosokawa, Higashine, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A storage apparatus, capable of record or reproduce of an optical information recording medium in which ROM information is recorded with phase pits and RAM information is recorded on top of a recording region of the phase pits, has a main controller that, when the output of the recording information detection system—a system for detecting reflected light of a laser beam from the optical information recording medium and generating signals corresponding to ROM and RAM information—simultaneously contains ROM and RAM signals corresponding to ROM and RAM information, performs negative feedback control of a semiconductor laser emission using ROM signal in the output of the recording information detection system and performs control so as to obtain read-out and played-back ROM signal from the output of an optical intensity detection system for detecting the intensity of the laser light.