US Patent No. 10,386,559

LIGHT EMITTING DEVICE COMPRISING WAVELENGTH CONVERTER


Patent No. 10,386,559
Issue Date August 20, 2019
Title Light Emitting Device Comprising Wavelength Converter
Inventorship Rifat Ata Mustafa Hikmet, Eindhoven (NL)
Dominique Maria Bruls, Heeze (NL)
Ties Van Bommel, Horst (NL)
Dirk Kornelis Gerhardus De Boer, Den Bosch (NL)
Assignee SIGNIFY HOLDING B.V., Eindhoven (NL)

Claim of US Patent No. 10,386,559

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.