Title:
SEMICONDUCTOR LIGHT-EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/154128
Kind Code:
A1
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.
Inventors:
UNO SHINGO (JP)
HIROKI TOMOYUKI (JP)
TOJO KOJI (JP)
SAIKAWA JIRO (JP)
ISHIGAKI NAOYA (JP)
SAKAMOTO JUNKI (JP)
HIROKI TOMOYUKI (JP)
TOJO KOJI (JP)
SAIKAWA JIRO (JP)
ISHIGAKI NAOYA (JP)
SAKAMOTO JUNKI (JP)
Application Number:
PCT/JP2016/057309
Publication Date:
September 14, 2017
Filing Date:
March 09, 2016
Export Citation:
Assignee:
SHIMADZU CORP (JP)
International Classes:
H01S5/062; H01L33/00; H05B37/02; H05B44/00
Foreign References:
| JP2008130523A | 2008-06-05 | |||
| JP2007317800A | 2007-12-06 |
Attorney, Agent or Firm:
MIYOSHI, Hidekazu et al. (JP)
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