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:
Feb. 17, 2015
Filed:
May. 10, 2013
Applicants:
Hitachi Consumer Electronics Co., Ltd., Tokyo, JP;
Hitachi-lg Data Storage, Inc., Tokyo, JP;
Inventors:
Assignees:
Hitachi Consumer Electronics Co., Ltd., Tokyo, JP;
Hitachi-LG Data Storage, Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/0045 (2006.01); G11B 27/36 (2006.01); G11B 7/1267 (2012.01); G11B 7/006 (2006.01);
U.S. Cl.
CPC ...
G11B 7/1267 (2013.01); G11B 7/0062 (2013.01);
Abstract
A recording waveform is adjusted based on the fluctuation amount of the mark edge position, focused on that fluctuation of a mark edge position is increased in aged deterioration of a recording signal. Specifically, the recording waveform is adjusted such that a fluctuation amount becomes minimum or a threshold value or less. Then, information is recorded on the optical disc using the recording waveform. Further, provided is a recording medium or an information recording apparatus which stores parameters of the recording waveform.