US 12,227,686 B2
Ceramic phosphor array
Rifat Ata Mustafa Hikmet, Eindhoven (NL); Ties Van Bommel, Horst (NL); and Oliver Francis Burke, Eindhoven (NL)
Assigned to SIGNIFY HOLDING B.V., Eindhoven (NL)
Appl. No. 18/011,218
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Jun. 18, 2021, PCT No. PCT/EP2021/066644
§ 371(c)(1), (2) Date Dec. 19, 2022,
PCT Pub. No. WO2021/259800, PCT Pub. Date Dec. 30, 2021.
Claims priority of application No. 20182147 (EP), filed on Jun. 25, 2020.
Prior Publication US 2023/0235222 A1, Jul. 27, 2023
Int. Cl. F21V 9/32 (2018.01); C09K 11/77 (2006.01); F21V 9/38 (2018.01); H01L 33/50 (2010.01)
CPC C09K 11/7774 (2013.01) [F21V 9/32 (2018.02); F21V 9/38 (2018.02); H01L 33/50 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A light generating device comprising a light source and a luminescent element, wherein:
the light source is configured to generate first radiation selected from one or more of UV radiation and visible radiation; wherein the light source comprises a laser light source;
the luminescent element comprises (i) a plurality of element bodies and (ii) a thermally conductive support; wherein the plurality of element bodies comprises a plurality of first bodies and a plurality of second bodies, the plurality of second bodies being different from the plurality of first bodies;
the plurality of first bodies comprise a luminescent material, wherein the luminescent material is configured to convert at least part of the first radiation into luminescent material light; wherein the first bodies have a first thermal conductivity K1; wherein the first bodies are configured in a light receiving relationship with the light source;
the plurality of second bodies are light transmissive for one or more wavelengths of the first radiation and the luminescent material light; wherein the second bodies have a second thermal conductivity K2, wherein K2≥0.2*K1;
the plurality of first bodies and the plurality of second bodies are configured in a 2D arrangement, wherein for the plurality of second bodies applies that they are configured adjacent to different first bodies; and the plurality of first bodies and second bodies are configured in thermal contact with the thermally conductive support,
wherein the first bodies have a first attenuation coefficient μ1 at one or more wavelengths of the first radiation, wherein the second bodies have a second attenuation coefficient μ2 at one or more wavelengths of the first radiation, wherein μ2≤0.1*μ1, and wherein the first bodies have a third attenuation coefficient μ3 at one or more wavelengths of the luminescent material light, wherein the second bodies have a fourth attenuation coefficient μ4 at one or more wavelengths of the luminescent material light, wherein 0.01*μ3≤μ4≤2*μ3.