Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
LIGHT-EMITTING DEVICE, FIBER LASER, AND, GROUND FAULT DETERMINATION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/105294
Kind Code:
A1
Abstract:
Provided is a light-emitting device capable of determining, in an unlit state, whether or not a ground fault has occurred, the determination not requiring the use of a shunt resistance. This light-emitting device (1) comprises: a current path (11) including a plurality of laser diodes (LD1 to LD6) and a power source (PS) provided upstream therefrom; and an LD control unit (13) determining whether or not a ground fault has occurred on the basis of an end-to-end voltage (VPQ) from a section containing the laser diode (LD1).

Inventors:
KAMEYAMA, Takashi (1440 Mutsuzaki, Sakura-sh, Chiba 50, 〒2858550, JP)
Application Number:
JP2017/040281
Publication Date:
June 14, 2018
Filing Date:
November 08, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
FUJIKURA LTD. (1-5-1, Kiba Koto-k, Tokyo 12, 〒1358512, JP)
International Classes:
H05B37/02; G01R31/02; H02H3/16; H02H7/00; H02H11/00
Foreign References:
JP2016195041A2016-11-17
JP2016088296A2016-05-23
JP2012160436A2012-08-23
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (Daiwa Minamimorimachi Building, 2-6 Tenjinbashi 2-chome Kita, Kita-ku, Osaka-sh, Osaka 41, 〒5300041, JP)
Download PDF: