US 10,386,559 B2
Light emitting device comprising wavelength converter
Rifat Ata Mustafa Hikmet, Eindhoven (NL); Dominique Maria Bruls, Heeze (NL); Ties Van Bommel, Horst (NL); and Dirk Kornelis Gerhardus De Boer, Den Bosch (NL)
Assigned to SIGNIFY HOLDING B.V., Eindhoven (NL)
Appl. No. 14/781,068
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Mar. 20, 2014, PCT No. PCT/IB2014/060001
§ 371(c)(1), (2) Date Sep. 29, 2015,
PCT Pub. No. WO2014/155250, PCT Pub. Date Oct. 2, 2014.
Claims priority of provisional application 61/806,450, filed on Mar. 29, 2013.
Prior Publication US 2016/0054501 A1, Feb. 25, 2016
Int. Cl. F21V 8/00 (2006.01); H01L 33/50 (2010.01); H01L 33/64 (2010.01); H01L 25/075 (2006.01)
CPC G02B 6/0003 (2013.01) [G02B 6/0046 (2013.01); G02B 6/0068 (2013.01); G02B 6/0073 (2013.01); G02B 6/0085 (2013.01); H01L 33/505 (2013.01); H01L 25/0753 (2013.01); H01L 33/642 (2013.01); H01L 2924/0002 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A light emitting device comprising:
a light source having a light exit surface:
a wavelength converter configured to convert light from a first wavelength to a second wavelength, said wavelength converter having a light exit surface and a light entrance surface which extend in an angle different from zero to one another;
a heat sink; and
an optical coupling element arranged in contact with said wavelength converter, and in thermal connection with said heat sink;
wherein said optical coupling element is selected to have a refractive index in the range of 1.1-1.6, and lower than a refractive index of said wavelength converter, and
said heat sink is thermally connected to said wavelength converter through said optical coupling element.