White light source and method of producing a white light source

1. A white light source comprising:

an arrangement of light-emitting diodes, wherein the light-emitting diodes are subdivided into first light-emitting diodes and second light-emitting diodes, and

a conversion element configured to absorb light emitted by the light-emitting diodes and generate converted light with a longer wavelength than the emitted light, wherein the conversion element comprises a first luminescent conversion material in a first matrix material, the first matrix material with the first luminescent conversion material is arranged two-dimensionally in a continuous layer above the first and second light-emitting diodes, the conversion element comprises a second luminescent conversion material in a second matrix material, and the second matrix material with the second luminescent conversion material is arranged only above the second light-emitting diodes,

wherein the first luminescent conversion material is configured to convert light emitted by the first light-emitting diodes into white light with a first color temperature, and light emitted by the second light-emitting diodes can be converted by the first luminescent conversion material in the first matrix material and the second luminescent conversion material in the second matrix material into white light with a second color temperature,

the arrangement of light-emitting diodes comprises third light-emitting diodes, and the conversion element comprises a third matrix material with a third luminescent conversion material in the region of the third light-emitting diodes,

the conversion element additionally comprises the second matrix material with the second luminescent conversion material in a region of the third light-emitting diodes, and

the light emitted by the third light-emitting diodes can be converted by the first luminescent conversion material in the first matrix material, the second luminescent conversion material in the second matrix material and the third luminescent conversion material in the third matrix material into white light with a third color temperature.

2. The white light source according to claim 1 , wherein the first color temperature differs from the second color temperature by at least 500 Kelvin.

3. The white light source according to claim 1 , wherein the first color temperature is higher than the second color temperature.

4. The white light source according claim 1 , wherein the first matrix material with the first luminescent conversion material is arranged two-dimensionally on the arrangement of light-emitting diodes, and the second matrix material with the second luminescent conversion material is arranged above the first matrix material in the form of a plurality of two-dimensional elements.

5. The white light source according to claim 1 , wherein the second matrix material with the second luminescent conversion material is arranged on the second light-emitting diodes, and the first matrix material with the first luminescent conversion material is arranged on the first light-emitting diodes and above the second light-emitting diodes on the second matrix material.

6. The white light source according to claim 1 , wherein the first light-emitting diodes and the second light-emitting diodes can respectively be driven individually on their own.

7. The white light source according to claim 1 , wherein the light-emitting diodes are arranged in columns and rows.

8. The white light source according to claim 7 , wherein the first light-emitting diodes are arranged in first columns, and the second light-emitting diodes are arranged in second columns.

9. The white light source according to claim 7 , wherein first light-emitting diodes and second light-emitting diodes are arranged alternately in a first row, beginning with a first light-emitting diode, first light-emitting diodes and second light-emitting diodes are arranged alternately in a second row, beginning with a second light-emitting diode, and further odd rows correspond to the first row and further even rows correspond to the second row.

10. The white light source according to claim 1 , wherein the light emitted by the third light-emitting diodes can be converted by the first luminescent conversion material in the first matrix material and the luminescent conversion material in the third matrix material into white light with a third color temperature.

11. A method of producing the white light source according to claim 1 , comprising:

providing an arrangement of light-emitting diodes, wherein the light-emitting diodes inside the arrangement are subdivided into first light-emitting diodes into second light-emitting diodes and into third light emitting diodes;

two-dimensional application of a first matrix material with a first luminescent conversion material onto the arrangement of light-emitting diodes;

application of a second matrix material with a second luminescent conversion material above the second light-emitting diodes, and

application of a third matrix material with a third luminescent conversion material above the third light-emitting diodes.

12. The method according to claim 11 , wherein the first matrix material with the first luminescent conversion material is applied first.

13. The method according to claim 11 , wherein the second matrix material with the second first luminescent conversion material is applied first.

14. A white light source comprising:

an arrangement of light-emitting diodes, wherein the light-emitting diodes are subdivided into first light-emitting diodes and second light-emitting diodes, and

a conversion element configured to absorb light emitted by the light-emitting diodes and generate converted light with a longer wavelength than the emitted light, wherein the conversion element comprises a first luminescent conversion material in a first matrix material, the first matrix material with the first luminescent conversion material is arranged two-dimensionally in a continuous layer above the first and second light-emitting diodes, the conversion element comprises a second luminescent conversion material in a second matrix material, the second matrix material with the second luminescent conversion material is arranged only above the second light-emitting diodes, the arrangement of light-emitting diodes comprises third light-emitting diodes, the conversion element comprises a third matrix material with a third luminescent conversion material in the region of the third light-emitting diodes, the light emitted by the third light-emitting diodes can be converted by the first luminescent conversion material in the first matrix material and the luminescent conversion material in the third matrix material into white light with a third color temperature.

15. The method according to claim 11 , wherein the first matrix material is applied two-dimensionally in a continuous layer above the first, second and third light-emitting diodes, wherein the second matrix material is applied above the second light emitting diodes, and wherein the third matrix material is applied above the third light emitting diodes.

16. The method according to claim 15 , wherein the second matrix material is also applied above the third light emitting diodes.

17. The method according to claim 16 , wherein the first luminescent conversion material is configured to convert light emitted by the first light-emitting diodes into white light with a first color temperature, and light emitted by the second light-emitting diodes can be converted by the first luminescent conversion material in the first matrix material and the second luminescent conversion material in the second matrix material into white light with a second color temperature and wherein light emitted by the third light-emitting diodes can be converted by the first luminescent conversion material in the first matrix material, the second luminescent conversion material in the second matrix material and the third luminescent conversion material in the third matrix material into white light with a third color temperature.

18. The method according to claim 15 , wherein the first luminescent conversion material is configured to convert light emitted by the first light-emitting diodes into white light with a first color temperature, and light emitted by the second light-emitting diodes can be converted by the first luminescent conversion material in the first matrix material and the second luminescent conversion material in the second matrix material into white light with a second color temperature and wherein the light emitted by the third light-emitting diodes can be converted by the first luminescent conversion material in the first matrix material and the luminescent conversion material in the third matrix material into white light with a third color temperature.