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:
Aug. 28, 2007
Filed:
Apr. 06, 2004
Motoyasu Terao, Hinode, JP;
Katsuhiko Yamaguchi, Hachioji, JP;
Tadao Ino, Hino, JP;
Kyoko Kojima, Kunitachi, JP;
Harukazu Miyamoto, Higashimurayama, JP;
Takeshi Maeda, Koganei, JP;
Yuko Tsuchiya, Tokorozawa, JP;
Motoyasu Terao, Hinode, JP;
Katsuhiko Yamaguchi, Hachioji, JP;
Tadao Ino, Hino, JP;
Kyoko Kojima, Kunitachi, JP;
Harukazu Miyamoto, Higashimurayama, JP;
Takeshi Maeda, Koganei, JP;
Yuko Tsuchiya, Tokorozawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An information recording method and information recording apparatus is capable of resolving the trade-off relation between recording density and transmittance, wherein either the reproduction (playback) signal quality or the recording sensitivity is lowered. For this purpose, a voltage is applied by way of ball bearings or slip rings to a specified layer of a medium having multiple layers. The light transmittance of the recording layer is changed by application of this voltage. The tradeoff relationship between recording density and transmittance is eliminated thereby, and the recording density and transmittance levels are both improved, so as to enhance the recording reliability.