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1. (WO2017033288) LIGHT-EMITTING DEVICE

Pub. No.:    WO/2017/033288    International Application No.:    PCT/JP2015/073864
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Wed Aug 26 01:59:59 CEST 2015
IPC: H01L 33/50
Applicants: SANKEN ELECTRIC CO., LTD.
サンケン電気株式会社
Inventors: MUROFUSHI, Hitoshi
室伏 仁
HOSHINO, Masanori
星野 匡紀
TANAKA, Yoshinori
田中 芳憲
Title: LIGHT-EMITTING DEVICE
Abstract:
A light-emitting device is provided with: a first light-emitting diode which includes a first blue light emitting element emitting first emitted light having a relatively short peak wavelength and a first fluorescence material layer emitting first excited light by being excited by the first emitted light, and which outputs first mixed color light of first chromaticity in which the first emitted light and the first excited light are mixed; and a second light-emitting diode which includes a second blue light emitting element emitting second emitted light having a relatively long peak wavelength and a second fluorescence material layer emitting second excited light by being excited by the second emitted light, and which outputs second mixed color light of second chromaticity in which the second emitted light and the second excited light are mixed. The first chromaticity and the second chromaticity are located at symmetric positions with respect to a predetermined chromaticity along the color temperature characteristics of black-body radiation in an xy chromaticity diagram, and the first mixed color light and the second mixed color light are mixed to output output light of predetermined chromaticity.