US 12,129,415 B2
Luminescent converter for a phosphor enhanced light source
Ties Van Bommel, Horst (NL); Rifat Ata Mustafa Hikmet, Eindhoven (NL); and Jan Cornelis Kriege, Mierlo (NL)
Assigned to SIGNIFY HOLDING, B.V., Eindhoven (NL)
Appl. No. 14/009,865
Filed by Ties Van Bommel, Horst (NL); Rifat Ata Mustafa Hikmet, Eindhoven (NL); and Jan Cornelis Kriege, Mierlo (NL)
PCT Filed Apr. 3, 2012, PCT No. PCT/IB2012/051621
§ 371(c)(1), (2), (4) Date Oct. 4, 2013,
PCT Pub. No. WO2012/140542, PCT Pub. Date Oct. 18, 2012.
Claims priority of application No. 11162040 (EP), filed on Apr. 12, 2011.
Prior Publication US 2014/0021857 A1, Jan. 23, 2014
Int. Cl. C09K 11/06 (2006.01); C09K 11/77 (2006.01); H01L 33/50 (2010.01); H05B 33/12 (2006.01)
CPC C09K 11/06 (2013.01) [C09K 11/7774 (2013.01); H01L 33/504 (2013.01); H05B 33/12 (2013.01); C09K 2211/1011 (2013.01); C09K 2211/1029 (2013.01); C09K 2211/1044 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A luminaire comprising:
a luminescent converter for a phosphor-enhanced light source and a light source, the luminescent converter including,
a first organic luminescent material, a second organic luminescent material, and an inorganic luminescent material;
the first organic luminescent material being configured for absorbing a first portion of light emitted by the light source and/or absorbing a portion of light emitted by the second organic luminescent material or the inorganic luminescent material, and the first organic luminescent material being further configured for converting at least a part of the absorbed light into light of a first color distribution, and absorbs a portion of light that is emitted by the first organic luminescent material;
the second organic luminescent material being configured for absorbing a second portion of the light emitted by the light source or absorbing a portion of light emitted by the first organic luminescent material or the inorganic luminescent material, and the second organic luminescent material being further configured for converting at least a part of the absorbed light into light of a second color distribution, at least one of the first organic luminescent material and the second organic luminescent material being subject to self-absorption, respectively, in their absorption of a portion of light at the lower wavelengths of the first color distribution by the first organic luminescent material and resulting in the absorption of a portion of light at the lower wavelengths of the second color distribution by the second organic luminescent material;
the inorganic luminescent material being configured for absorbing a third portion of the light emitted by the light source or absorbing a portion of light emitted by the first organic luminescent material or the second organic luminescent material, and the inorganic luminescent material being further configured for converting at least a part of the absorbed light into a third color distribution for compensating the self-absorption of light by at least one of the first organic luminescent material and the second organic luminescent material,
wherein a predetermined amount of the first and/or second organic luminescent materials is selected to provide a light spectrum with a color rendering index (CRI) that is lower than 80 and a predetermined amount of the inorganic luminescent material is selected to provide white light with a CRI that is higher than 80.