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. 28, 1989
Filed:
Jun. 08, 1987
Rene Dufour, Eindhoven, NL;
U.S. Philips Corp., New York, NY (US);
Abstract
A method of and a device for pulse-mode driving a semiconductor laser in which the semiconductor laser (60) is operated by first driving the laser into the LED region with a pedestal current pulse from a first current source (41) and by superposing thereon an information current pulse from a second current source (51) after current stabilization. Due to this two-stage drive, switching transients can be reduced so that shorter pulses are possible and unnecessary power dissipation between the information pulses is avoided, which extends to the lifetime of the semi-conductor laser.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile