US 12,085,239 B2
High-intensity light source with high CRI
Rifat Ata Mustafa Hikmet, Eindhoven (NL); and Ties Van Bommel, Horst (NL)
Assigned to SIGNIFY HOLDING, B.V., Eindhoven (NL)
Appl. No. 17/760,833
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Sep. 14, 2020, PCT No. PCT/EP2020/075608
§ 371(c)(1), (2) Date Mar. 16, 2022,
PCT Pub. No. WO2021/052900, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 19197971 (EP), filed on Sep. 18, 2019.
Prior Publication US 2022/0341550 A1, Oct. 27, 2022
Int. Cl. F21K 9/64 (2016.01); H01L 33/50 (2010.01); H01S 5/00 (2006.01); F21Y 113/10 (2016.01)
CPC F21K 9/64 (2016.08) [H01L 33/502 (2013.01); H01S 5/0087 (2021.01); F21Y 2113/10 (2016.08)] 16 Claims
OG exemplary drawing
 
1. A light generating device configured to generate device light, wherein the light generating device comprises (i) a first light source configured to generate blue first light source light, wherein the first light source is a first laser light source, (ii) a first luminescent material configured to convert part of the blue first light source light into first luminescent material light having an emission band having wavelengths in one or more of the green and yellow, (iii) an optical filter configured to optically filter the first luminescent material light into optically filtered first luminescent material light, whereby the optically filtered first luminescent material light is red-shifted relative to the first luminescent material light, and (iv) a second light source configured to generate red second light source light, wherein the second light source comprises a second laser light source; wherein in one or more operational modes of the light generating device the light generating device is configured to generate white device light comprising the first light source light, the optically filtered first luminescent material light, and the second light source light,
wherein the light generating device further comprises a control system configured to control the first light source and the second light source, wherein the control system is configured to control one or more optical properties of the device light,
wherein the one or more optical properties include the correlated color temperature and the color rendering index, wherein in one or more controlling modes the control system is configured to keep the color rendering index over 85 and the correlated color temperature below 3100 K.