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. 07, 2006
Filed:
Jun. 20, 2001
Takeshi Aikiyo, Tokyo, JP;
Chihomi Furuhashi, Tokyo, JP;
Takashi Koseki, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
The invention provides a semiconductor laser module which can suppress overcurrent flowing into a thermo-module, wherein the thermo-module () carries out a heating action when a reverse current flows from lead pin () through lead pin (), and contrarily carries out a cooling action when a current flows from the lead pin () through the lead pin (). An overcurrent limiting means () is provided, which can suppress overcurrent flowing into the thermo-module () in its heating direction. The overcurrent limiting circuit () is provided with a bypass line (), a resistor (), and a diode (). When a current flows in the heating direction, the diode () is turned on, whereby the current is shunted to the thermo-module () and bypass line () for flow, and accordingly, the overcurrent flowing into the thermo-module () can be effectively suppressed.