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:
Mar. 25, 2008
Filed:
Oct. 05, 2006
Akira Shirota, Tokorozawa, JP;
Kunihiko Horikawa, Tokorozawa, JP;
Eiji Muramatsu, Tokorozawa, JP;
Shoji Taniguchi, Tokorozawa, JP;
Akira Shirota, Tokorozawa, JP;
Kunihiko Horikawa, Tokorozawa, JP;
Eiji Muramatsu, Tokorozawa, JP;
Shoji Taniguchi, Tokorozawa, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
The information recording apparatus irradiates a laser beam on a recording medium such as an optical disk and forms a recording mark corresponding to a recording signal to record information. A recording pulse signal includes a mark period irradiating the laser beam for forming the recording mark and a space period in which the recording mark is not formed. The mark period has a top pulse period and an intermediate bias period following the top pulse period. The mark period constituted by the top pulse period and the intermediate bias period does not have a continuous part of a plurality of pulses having a small pulse width unlike a pulse train, so that the correct recording mark can be stably formed on the recording medium without an inadequate deformation of a recording pulse shape, even in the case of a high speed recording.