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1. (WO2017154128) SEMICONDUCTOR LIGHT-EMITTING DEVICE

Pub. No.:    WO/2017/154128    International Application No.:    PCT/JP2016/057309
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Thu Mar 10 00:59:59 CET 2016
IPC: H01S 5/062
H01L 33/00
H05B 37/02
Applicants: SHIMADZU CORPORATION
株式会社島津製作所
Inventors: UNO, Shingo
宇野 進吾
HIROKI, Tomoyuki
廣木 知之
TOJO, Koji
東條 公資
SAIKAWA, Jiro
齊川 次郎
ISHIGAKI, Naoya
石垣 直也
SAKAMOTO, Junki
坂本 隼規
Title: SEMICONDUCTOR LIGHT-EMITTING DEVICE
Abstract:
The present invention comprises: a light-emitting element group configured from a plurality of columns of serially connected light-emitting elements, one of the ends from each of the plurality of columns of the light-emitting elements being collectively connected to a power source; a plurality of current control elements, provided to correspond to the plurality of columns, and being connected to each of the columns of the light-emitting elements at the other end thereof, for controlling the current flowing through the light-emitting elements; a forward voltage monitoring circuit for monitoring, for each of the columns, the total forward voltage across the light-emitting elements; and a control circuit for controlling the current control elements, on the basis of the total forward voltage across the light-emitting elements from each of the columns detected by the forward voltage monitoring circuit, in such a manner that the variations in the total forward voltage across the plurality of columns of the light-emitting elements reach a threshold value or lower.