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. 15, 2005
Filed:
Jul. 10, 2003
Takashi Sasaki, Kanagawa, JP;
Munetoshi Moriichi, Saitama, JP;
Mitsuyuki Bamba, Saitama, JP;
Yoshiyasu Masuda, Tokyo, JP;
Takashi Sasaki, Kanagawa, JP;
Munetoshi Moriichi, Saitama, JP;
Mitsuyuki Bamba, Saitama, JP;
Yoshiyasu Masuda, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A recording apparatus generates a first pulse (EQEFM signal) in accordance with recording data such as an EFM signal. A second pulse (first overdrive pulse) to be combined with substantially the leading edge of the first pulse is generated. A third pulse (end overdrive pulse) to be combined with substantially the trailing edge of the first pulse is generated. The first, second, and third pulses are combined to synthesize a driving pulse, and the driving pulse is supplied to a laser unit. At least one of the first, second, and third pulses is controlled so that one of the level and the pulse duration thereof is varied in accordance with the length of formed pits and lands.