Light conversion assembly, a lamp and a luminaire

1. A device comprising:

a light source for emitting first light of a first spectral distribution in a violet or blue spectral range;

a first luminescent material comprising particles showing quantum confinement and having at least in one dimension a size in the nanometer range, the first luminescent material being disposed to receive the first light, the first luminescent material being configured to absorb substantially all the received first light, the first luminescent material emitting second light of a second spectral distribution in the blue spectral range, independently of the position of first spectral distribution in the violet or blue spectral range;

a second luminescent material, the second luminescent material being arranged to receive second light and being configured to at least partially convert the received second light into third light of a third spectral distribution being different from the first spectral distribution and the second spectral distribution; and

a third luminescent material, the third luminescent material being arranged to receive second and/or third light and being configured to at least partially convert the received second and/or third light into fourth light of a fourth spectral distribution being different from the first, second, and third spectral distributions.

2. The device of claim 1 wherein a peak wavelength of the second spectral distribution is longer than a peak wavelength of the first spectral distribution.

3. The device of claim 1 wherein the second luminescent material and third luminescent material are arranged in different layers.

4. The device of claim 1 wherein the second luminescent material and third luminescent material are mixed in a single layer.

5. The device of claim 1 wherein the second luminescent material and third luminescent material are arranged in a single layer wherein the second and third luminescent materials are separated in space in the single layer.

6. The device of claim 1 wherein the second luminescent material is arranged on the first luminescent material, the third luminescent material is arranged on the second luminescent material, and the first luminescent material is spaced apart from the light source.

7. The device of claim 1 wherein the first luminescent material comprises one of CdS, CdSe, ZnS, InP, CuInS 2 , and AgInS 2 .

8. A device comprising:

a light source for emitting first light of a first spectral distribution in a violet or blue spectral range;

a first luminescent material comprising particles showing quantum confinement and having at least in one dimension a size in the nanometer range, the first luminescent material being disposed to receive the first light, the first luminescent material being configured to absorb substantially all the received first light, the first luminescent material emitting second light of a second spectral distribution in the blue spectral range, independently of the position of first spectral distribution in the violet or blue spectral range;

a second luminescent material, the second luminescent material being arranged to receive second light and being configured to at least partially convert the received second light into third light of a third spectral distribution being different from the first spectral distribution and the second spectral distribution; and

a gap disposed between the light source and the first luminescent material.

9. The device of claim 8 , wherein a gap is present between the first luminescent material and the second luminescent material.

10. The device of claim 8 , further comprising an optical bridging element in optical contact with the light source and the first luminescent material.

11. The device of claim 10 wherein the optical bridging element is one of glass, quartz, thermally stable polymer, silicone, and polydimethylsiloxane.

12. The device of claim 8 further comprising a reflective light mixing chamber, wherein at least one of the light source, the first luminescent material, and the second luminescent material are arranged within the reflective light mixing chamber, wherein the reflective light mixing chamber comprises reflective sidewalls.

13. The device of claim 12 , wherein the reflective light mixing chamber comprises a light exit window and the second luminescent material is arranged at the light exit window.

14. The device of claim 8 wherein the first luminescent material comprises at least one of quantum dots, quantum rods and quantum tetrapods.

15. The device of claim 8 further comprising a scattering material disposed with the second luminescent material.

16. The device of claim 15 wherein the scattering material comprises one of Al 2 O 3 , BaSO 4 , and TiO 2 .

17. A device comprising:

a light source for emitting first light of a first spectral distribution in a violet or blue spectral range;

a first luminescent material comprising particles showing quantum confinement and having at least in one dimension a size in the nanometer range, the first luminescent material being disposed to receive the first light, the first luminescent material being configured to absorb substantially all the received first light, the first luminescent material emitting second light of a second spectral distribution in the blue spectral range, independently of the position of first spectral distribution in the violet or blue spectral range.

18. The device of claim 17 , wherein an absorption spectrum of the first luminescent material fully overlaps with the first spectral distribution.

19. The device of claim 17 , wherein a quantity of first luminescent material is large enough to fully absorb the received first light.