US 12,104,785 B2
Laser-phosphor light source with improved brightness and thermal management
Ties Van Bommel, Horst (NL); and Rifat Ata Mustafa Hikmet, Eindhoven (NL)
Assigned to SIGNIFY HOLDING, B.V., Eindhoven (NL)
Appl. No. 18/030,014
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Oct. 4, 2021, PCT No. PCT/EP2021/077225
§ 371(c)(1), (2) Date Apr. 3, 2023,
PCT Pub. No. WO2022/073895, PCT Pub. Date Apr. 14, 2022.
Claims priority of application No. 20200837 (EP), filed on Oct. 8, 2020.
Prior Publication US 2023/0375157 A1, Nov. 23, 2023
Int. Cl. F21V 9/30 (2018.01); F21V 7/22 (2018.01); F21V 29/70 (2015.01); H04N 9/31 (2006.01)
CPC F21V 9/30 (2018.02) [F21V 7/22 (2013.01); F21V 29/70 (2015.01); H04N 9/3144 (2013.01); H04N 9/3152 (2013.01); H04N 9/3161 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A light generating system comprising a light generating device, a luminescent body, a heatsink and first optics, wherein:
the light generating device is configured to generate device light; wherein the light generating device comprises a laser;
the luminescent body comprises a luminescent material, wherein the luminescent material is configured to convert at least part of the device light into luminescent material light, and wherein the luminescent body is transmissive for at least part of the luminescent material light;
the first optics are transmissive for at least part of the device light and reflective for at least part of the luminescent material light, wherein the first optics comprise a primary optic surface having a first surface area A1, wherein the primary optic surface is configured in a light receiving relationship with the light generating device;
the luminescent body is at least partly enclosed by the heatsink, and wherein the luminescent body is thermally coupled with the heatsink
the luminescent body is enclosed by a cavity having a cavity opening having a smallest cross-sectional area A2, wherein the cavity is defined by the first optics and the heatsink; wherein the first optics comprises the cavity opening; wherein A2<A1; and
the cavity being reflective for the luminescent material light and, during operation, at least 70% of the luminescent material light substantially only exiting the cavity via the cavity opening.