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:
Jul. 20, 2004
Filed:
Aug. 14, 2001
Akinori Shiozawa, Hitachinaka, JP;
Hisataka Sugiyama, Kodaira, JP;
Masataka Ohta, Hitachinaka, JP;
Hiroaki Ono, Mito, JP;
Hiroyuki Minemura, Kodaira, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An optical disc apparatus including a system controller that receives a recording control command via an interface. A recording control block that receives a recording method command signal indicative of one of recording with verify and real time recording and recording data from the system controller. An optical head that modulates the power of laser beam using a recording pulse sent from the control block and records the recording data on an information recording medium. The recording data is recorded in the information recording medium according to the recording with verify and the real time recording using different recording power respectively, in which under the recording with verify, the recording power determined by recording compensation learning is used, and under the real time recording, the recording power higher than the recording power obtained by the recording compensation learning is used.