US 12,458,217 B2
Light emitting device and medical device using same
Takeshi Abe, Osaka (JP); Shozo Oshio, Osaka (JP); and Mitsuru Nitta, Kyoto (JP)
Assigned to Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Appl. No. 17/427,202
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jan. 27, 2020, PCT No. PCT/JP2020/002680
§ 371(c)(1), (2) Date Feb. 8, 2022,
PCT Pub. No. WO2020/162243, PCT Pub. Date Aug. 13, 2020.
Claims priority of application No. 2019-017797 (JP), filed on Feb. 4, 2019.
Prior Publication US 2023/0105882 A1, Apr. 6, 2023
Int. Cl. A61B 1/06 (2006.01); F21V 9/38 (2018.01); F21Y 115/10 (2016.01); H01S 5/00 (2006.01); H10H 20/851 (2025.01)
CPC A61B 1/0653 (2013.01) [A61B 1/0638 (2013.01); A61B 1/0669 (2013.01); F21V 9/38 (2018.02); H01S 5/0087 (2021.01); H10H 20/8513 (2025.01); F21Y 2115/10 (2016.08)] 7 Claims
OG exemplary drawing
 
1. A light emitting device, comprising:
a solid-state light-emitting element that emits primary light in which an energy density is 0.5 W/mm2 or more; and
a wavelength converter including a single phosphor, wherein the single phosphor emits first wavelength-converted light,
wherein the single phosphor consists of a crystal structure of garnet,
wherein the first wavelength-converted light has a light component across at least a whole of a wavelength range of 700 nm or more and less than 800 nm,
wherein the first wavelength-converted light has a fluorescence peak within a wavelength range of 700 nm to 1000 nm,
wherein energy of fluorescence emitted from the wavelength converter is 100 mW or more, and
wherein the light emitting device is used for a photodynamic therapy.