LIGHT SOURCE DEVICE COMPRISING WAVELENGTH CONVERSION ELEMENT

WIPO Patent Application WO/2019/202948

A1

The present invention realizes a light source device comprising a wavelength conversion element. The light source device comprises: a light source that emits excitation light; a phosphor that is excited by excitation light emitted from the light source and emits fluorescence; a second optical element that receives the light of the excitation light that is regularly reflected at the interface of the phosphor; and a reflector that has a reflective surface for reflecting the fluorescence emitted from the phosphor, wherein the second optical element reflects at least a portion of the received light, and is placed on a light path of the regularly reflected light facing from the phosphor to the reflector, at an angle with respect to the light path, the placement angle is an angle that is between a first angle for which the amount of light emitted by reflection of the reflector is a minimum and a second angle that does not obstruct emission of fluorescent light reflected by the reflector, and does not include the first angle but does include the second angle.

UEKI TOMOKO
KAMADA TSUYOSHI
AOMORI SHIGERU
MATSUKIYO HIDETSUGU

PCT/JP2019/013982

October 24, 2019

March 29, 2019

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SHARP KK (JP)

F21S41/36; F21S41/16; F21S41/176; F21S41/37; F21V7/00; F21V7/09; F21V7/28; F21V9/32; F21W102/13; F21Y115/30

JP2012164586A	2012-08-30
JP2013016268A	2013-01-24
JP2017147049A	2017-08-24
JP2013222646A	2013-10-28
JP2016197523A	2016-11-24
JP2016081890A	2016-05-16
JP2013026161A	2013-02-04
JP2014135159A	2014-07-24
US20160223158A1	2016-08-04

INOUE Tomoya (JP)

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