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.:

US 7688874 B1

PDF
Full Text
Expired
Date of Patent:
Mar. 30, 2010

Filed:

Dec. 26, 2007
Applicants:

Nobuaki Kaji, Yokohama, JP;

Kazuo Watabe, Yokohama, JP;

Inventors:

Nobuaki Kaji, Yokohama, JP;

Kazuo Watabe, Yokohama, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A semiconductor laser driving device includes a current supply unit supplying current to a semiconductor laser; a first control unit controlling the current supply unit to supply a first current which is half or less of a lasing threshold of the semiconductor laser; and a second control unit controlling the current supply unit to supply a second current which is larger than the lasing threshold after a first time is passed from an edge of a clock signal.


Find Patent Forward Citations

Kaji, Nobuaki. (2010). Semiconductor laser driving device, optical head, optical disk device, and semiconductor laser driving method (U.S. Patent No. 7688874). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7688874

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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