LIGHT EMITTING DEVICE WITH SPECTRAL CONVERSION ELEMENT

摘要

A light emitting device comprising at least one first light source (21, 22, 23, 24, 25, 211) adapted for, in operation, emitting first light (13) with a first spectral distribution, a first light guide (3) comprising a first light input surface (31), a first light exit surface (32) and at least one first further surface (33, 34, 35, 36), the first light guide being adapted for receiving the fir with the first spectral distribution at the first light input surface, guiding the first light to the first light exit surface and coupling the first light with the first spectral distribution out of the first light exit surface, at least one luminescent element (90) arranged on the first light exit surface of the first light guide, the at least one luminescent element comprising a second light input surface (91), a second light exit surface (92) and at least one light exit surface (92) and at least one second further surface (93, 94, 95, 96), the luminescent element spectral distribution at the second light input surface, converting at least a part of the first light with the first spectral distribution to second light (14) with a second spectral distribution, guiding the second light to the second light exit surface and coupling the second light with the second spectral distribution out of the second light exit surface, the light emitting device further comprising at least one first heat sink element (70) arranged at or on a surface of the luminescent element facing away from the second light input surface (92).

主权项

1. A light emitting device comprising:
a plurality of first solid state light sources adapted for, in operation, emitting first light with a first spectral distribution, a first light guide comprising a first light input surface, a first light exit surface extending in an angle different from zero to one another and at least one first further surface, the first light guide being adapted for receiving the first light with the first spectral distribution at the first light input surface, guiding the first light to the first light exit surface and coupling the first light with the first spectral distribution out of the first light exit surface, the plurality of light sources being arranged adjacent to and in optical contact with the first light input surface of the first light guide, at least one luminescent element arranged on the first light exit surface of the first light guide, the at least one luminescent element comprising a second light input surface, a second light exit surface and at least one second further surface, the second light input surface and the second light exit surface extending at an angle different from zero with respect to another, the luminescent element being adapted for receiving the first light with the first spectral distribution at the second light input surface, converting at least a part of the first light with the first spectral distribution to second light with a second spectral distribution, guiding the second light to the second light exit surface and coupling the second light with the second spectral distribution out of the second light exit surface, the light emitting device further comprising at least one first heat sink element arranged at or on a surface of the luminescent element opposite and parallel to the second light input surface.