Illumination device, luminaire and display device
View Patent ↗An illumination device ( 1, 1 A, 1 B) is disclosed. The illumination device ( 1, 1 A, 1 B) contains an organic light-emitting component ( 2, 2 A, 2 B, 2 C, 2 C′) containing a functional layer sequence ( 23, 23 A) for generating light, a light passage area ( 7, 7 A, 7 B), which is provided for coupling out light emitted by the organic light-emitting component ( 2, 2 A, 2 B, 2 C, 2 C′) from the illumination device ( 1, 1 A, 1 B) and for coupling ambient light into the illumination device ( 1, 1 A, 1 B) a retroreflector ( 5, 5 A, 5 B), which is provided for reflecting at least part of the ambient light coupled in through the light passage area ( 7, 7 A, 7 B) back to the light passage area ( 7, 7 A, 7 B). The organic light-emitting component ( 2, 2 A, 2 B, 2 C, 2 C′) is embodied such that it is at least partly light-transmissive. The functional layer sequence ( 23, 23 A) of the organic light-emitting component ( 2, 2 A, 2 B, 2 C, 2 C′) is arranged between the light passage area ( 7, 7 A, 7 B) and the retroreflector ( 5, 5 A, 5 B). A luminaire ( 10 ) and a display device ( 100 ) are also disclosed.
1. An illumination device comprising:
an organic light-emitting component containing a functional layer sequence for generating light;
a light passage area for coupling out light emitted by the organic light-emitting component from the illumination device and for coupling ambient light into the illumination device;
a wavelength-selective retroreflector for reflecting at least part of the ambient light coupled in through the light passage area back to the light passage area,
wherein the organic light-emitting component is embodied such that it is at least partly light-transmissive,
wherein the functional layer sequence is arranged between the light passage area and the retroreflector.
2. The illumination device according to claim 1 , wherein ambient light that impinges on the light passage area at an entrance angle, is coupled into the illumination device and reflected back to the light passage area by the retroreflector is coupled out from the illumination device at an exit angle with respect to the light passage area, said exit angle having substantially the same value as the entrance angle.
3. The illumination device according to claim 1 , comprising a color filter layer, which is arranged at least in places between the light passage area and the functional layer sequence.
4. The illumination device according to claim 1 , comprising a plurality of organic light-emitting components arranged laterally alongside one another.
5. The illumination device according to claim 4 , wherein different color filters are assigned to at least two organic light-emitting components arranged laterally alongside one another.
6. The illumination device according to claim 1 , comprising a plurality of organic light-emitting components whose functional layer sequences overlap laterally.
7. The illumination device according to claim 1 , wherein the retroreflector has a mirror layer having a plurality of beam shaping elements, wherein at least one beam shaping element includes or consists of a depression in the surface of the mirror layer and/or at least one beam shaping element has or consists of a lens element.
8. The illumination device according to claim 1 , wherein:
the retroreflector has a mirror layer having a plurality of beam shaping elements,
at least one beam shaping element has a depression in the surface of the mirror layer and a lens element, and
the lens element is partly arranged in the depression and projects beyond the depression in a direction of the light passage area.
9. The illumination device according to claim 1 , wherein the retroreflector has a plurality of beam shaping elements which are arranged in an at least partly light-transmissive carrier layer and are embodied in reflective fashion in places.
10. The illumination device according to claim 1 , which is embodied in flexible fashion.
11. The illumination device according to claim 1 , which is a warning marking or a reflector.
12. A luminaire for a means of transport comprising an illumination device according to claim 1 .
13. A display device comprising an illumination device according to claim 1 .
14. A garment or item of luggage provided with an illumination device according to claim 1 .
15. A garment or item of luggage provided with a display device according to claim 13 .
16. The illumination device according to claim 1 , wherein the wavelength selective retroreflector is a wavelength-selective mirror layer.
17. The illumination device according to claim 1 , wherein the wavelength selective retroreflector is a color filter layer, the color filter layer being arranged between the organic light-emitting component and a side of the illumination device remote from the light passage area.
18. An illumination device comprising:
a plurality of organic light-emitting components, each containing a functional layer sequence for generating light;
a light passage area for coupling out light emitted by the organic light-emitting components from the illumination device and for coupling ambient light into the illumination device;
a retroreflector for reflecting at least part of the ambient light coupled in through the light passage area back to the light passage area, wherein the organic light-emitting components are embodied such that they are at least partly light-transmissive;
wherein the functional layer sequences of the plurality of organic light-emitting components overlap laterally and the functional layer sequences are arranged between the light passage area and the retroreflector.