Light-generating arrangement
View Patent ↗The invention relates to a light-generating arrangement comprising a light-emitting semiconductor element provided with electric supply lines and a transparent light-directing element ( 2 ) which is arranged upstream of the semiconductor element in the emission direction at a distance therefrom and which is used for concentrating the light emitted by said semiconductor element in such a way that a light stream is formed. The light output surface ( 4 ) of the light-directing element ( 2 ) comprises a microstructure ( 6 ) consisting of a plurality of elevations and cavities deviating the trajectory of the light stream by <5°.
1. A light-generating arrangement comprising:
a light-emitting semiconductor element having electrical supply lines; and
a transparent light-orienting element arranged in front of the light-emitting semiconductor element at a distance in a direction of light emission, said light-orienting element concentrating the light emitted by the light-emitting semiconductor element to form a directional luminous flux;
wherein a coupling-out surface of the light-orienting element has a microstructure formed from a multiplicity of nonuniform elevations and depressions having a peak-to-valley height of less than 100 μm, said microstructure deflecting individual beam paths of directed light beams of the luminous flux by an angle of <5°.
2. The light-generating arrangement as claimed in claim 1 , wherein the light-orienting element is a converging lens.
3. The light-generating arrangement as claimed in claim 1 , wherein the light-orienting element is a plastic injection-molded part having the microstructure integrally formed on the coupling-out surface.
4. The light-generating arrangement as claimed in claim 1 , wherein the microstructure is formed on a transparent film and fixed on a coupling-out surface by a refractive-index-matched adhesive.
5. The light-generating arrangement as claimed in claim 2 , wherein the microstructure is formed on a transparent film and fixed on a coupling-out surface by a refractive-index-matched adhesive.
6. The light-generating arrangement as claimed in claim 1 , wherein the microstructure is formed on a transparent film and is fixed on a coupling-out surface by a refractive-index-matched adhesive.
7. The light-generating arrangement as claimed in claim 1 , wherein the microstructure is formed by a resist which is applied to at least one of a coupling-out surface and the wall of the light-orienting element, a free surface of which assumes a shape of the microstructure upon curing.
8. The light-generating arrangement as claimed in claim 2 , wherein the microstructure is formed by a resist which is applied to at least one of a coupling-out surface and a wall of the light-orienting element, a free surface of which assumes a shape of the microstructure upon curing.
9. The light-generating arrangement as claimed in claim 1 , wherein the microstructure is formed by a resist which is applied to at least one of a coupling-out surface and a wall of the light-orienting element, a free surface of which assumes a shape of the microstructure upon curing.
10. The light-generating arrangement as claimed in claim 1 , wherein the microstructure is formed by a multiplicity of microlenses or microlens-like elevations arranged in a distributed manner on at least one of a coupling-out surface and a wall of the light-orienting element.
11. The light-generating arrangement as claimed in claim 1 , wherein the elevations and depressions are arranged in a stochastically distributed manner.
12. A light-generating arrangement comprising:
a light-emitting semiconductor element having electrical supply lines; and
a transparent light-orienting element arranged in front of the light-emitting semiconductor element at a distance in the emission direction, said light-orienting element concentrating light emitted by the light-emitting semiconductor element to form a directional luminous flux;
wherein a wall of the light-orienting element, which extends from the coupling-in surface to the coupling-out surface of the light-orienting element, has a microstructure formed from a multiplicity of nonuniform elevations and depressions having a peak-to valley height of <100 μm, said microstructure deflecting a reflection of individual beam paths of directed light beams of the luminous flux at the wall of the light-orienting element by an angle of <5°.
13. The light-generating arrangement as claimed in claim 12 , wherein the light-orienting element is a converging lens.
14. The light-generating arrangement as claimed in claim 13 , wherein the light-orienting element is a plastic injection-molded part having the microstructure integrally formed on the wall of the light orienting element.
15. The light-generating arrangement as claimed in claim 12 , wherein the microstructure is formed on a transparent film and fixed on a coupling-out surface by a refractive-index-matched adhesive.
16. The light-generating arrangement as claimed in claim 13 , wherein the microstructure is formed on a transparent film and fixed on a coupling-out surface by a refractive-index-matched adhesive.
17. The light-generating arrangement as claimed in claim 12 , wherein the microstructure is formed on a transparent film and fixed on a coupling-out surface by a refractive-index-matched adhesive.
18. The light-generating arrangement as claimed in claim 12 , wherein the microstructure is formed by a resist which is applied to at least one of a coupling-out surface and the wall of the light-orienting element, a free surface of which assumes a shape of the microstructure upon curing.
19. The light-generating arrangement as claimed in claim 13 , wherein the microstructure is formed by a resist which is applied to at least one of a coupling-out surface and the wall of the light-orienting element, a free surface of which assumes a shape of the microstructure upon curing.
20. The light-generating arrangement as claimed in claim 12 , wherein the microstructure is formed by a resist which is applied to at least one of a coupling-out surface and the wall of the light-orienting element, a free surface of which assumes a shape of the microstructure upon curing.
21. The light-generating arrangement as claimed in claim 12 , wherein the microstructure is formed by a multiplicity of microlenses or microlens-like elevations arranged in a distributed manner on at least one of a coupling-out surface and a wall of the light-orienting element.
22. The light-generating arrangement as claimed in claim 12 , wherein the elevations and depressions are arranged in a stochastically distributed manner.