US 12,130,008 B2
Light emission device and illumination apparatus
Akira Miyake, Omihachiman (JP)
Assigned to KYOCERA Corporation, Kyoto (JP)
Appl. No. 18/038,451
Filed by KYOCERA Corporation, Kyoto (JP)
PCT Filed Nov. 25, 2021, PCT No. PCT/JP2021/043284
§ 371(c)(1), (2) Date May 24, 2023,
PCT Pub. No. WO2022/114086, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. 2020-196995 (JP), filed on Nov. 27, 2020.
Prior Publication US 2024/0011621 A1, Jan. 11, 2024
Int. Cl. F21V 9/30 (2018.01); F21S 4/28 (2016.01)
CPC F21V 9/30 (2018.02) [F21S 4/28 (2016.01)] 12 Claims
OG exemplary drawing
 
1. A light emission device comprising:
a substrate having a first surface;
a light emission element mounted on the first surface, the light emission element emitting excitation light;
a reflective film covering at least a portion of the first surface; and
a wavelength converter positioned on at least a portion of the first surface and the light emission element, the wavelength converter converting the excitation light into illumination light,
wherein the substrate comprises at least one of:
a recess having a second surface and a third surface, the second surface being positioned below the first surface, the third surface connecting the second surface and the first surface to each other; or
a projection projecting upward from the first surface,
wherein, when the substrate comprises the recess, the wavelength converter is in contact with at least a portion of the second surface without the reflective film being disposed between the wavelength converter and the portion of the second surface, and
wherein the wavelength converter is in contact with at least one of:
at least a portion of the second surface; or
at least a portion of the projection.