IP Library › Granted Patent US 9,070,311
Granted Patent B2
US 9,070,311 · App. 12/525,642 · Granted Jun 30, 2015

Illumination device with radiation reflectors arranged modularly to form a radiation-reflecting luminous area

Inventors: Guenter Kirchberger (Sinzing, DE); Ludwig Ploetz (Arnschwang, DE); Markus Zeiler (Undorf-Nittendorf, DE); Hubert Ott (Bad Abbach, DE)
Assignee: OSRAM OPTO SEMICONDUCTORS GMBH
G09F13/14G02B5/09
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Quick Facts
Patent No.
US 9,070,311
App. No.
12/525,642
Granted
Jun 30, 2015
Kind
B2
Abstract

An illumination device includes a number of radiation reflectors that are each irradiated by at least one light source. The radiation reflectors are shaped in such a way that they can be combined modularly to form a radiation-reflecting luminous area.

Claims (43)

1. An illumination device for a display panel, comprising:

a plurality of radiation reflectors, each reflector being irradiated by at least one light source,

wherein the radiation reflectors are arranged modularly to form a radiation-reflecting luminous area along a first plane for backlighting the display panel; and

wherein at least two radiation reflectors overlap laterally in places along the first plane, so that one of the at least two radiation reflectors covers over the at least one light source that illuminates the other radiation reflector, when viewed along a direction perpendicular to the first plane of the radiation-reflecting luminous area.

2. The illumination device according to claim 1 ,

wherein the at least one light source is arranged at a center of the radiation reflectors,

wherein the at least one light source is formed in such a way that light generated by the at least one light source is emitted radially in a direction of the radiation reflectors, and

wherein the radiation reflectors are each shaped in such a way that light reflected at each of the radiation reflectors is reflected in a direction perpendicular to the direction of the light emitted by the at least one light source.

3. The illumination device according to claim 1 , wherein each of the radiation reflectors has a plurality of radiation-reflecting areas.

4. The illumination device according to claim 3 , wherein the radiation-reflecting areas of each radiation reflector is arranged in a manner curved outwards from the center of the respective radiation reflector.

5. The illumination device according to claim 4 , wherein a light source is arranged at the center of each radiation reflector, each of the radiation-reflecting areas of each radiation reflector being irradiated by one of the at least one light sources.

6. The illumination device according to claim 3 , wherein the radiation-reflecting areas of the radiation reflectors are formed in triangular fashion.

7. The illumination device according to claim 3 , wherein a peripheral line of the radiation-reflecting areas of the radiation reflectors is formed as an equilateral triangle.

8. The illumination device according to claim 3 , wherein the radiation-reflecting areas of the radiation reflectors are formed in the form of a circle segment.

9. The illumination device according to claim 8 , wherein each of the radiation reflectors comprises at least two radiation-reflecting areas.

10. The illumination device according to claim 8 , wherein the radiation reflectors are arranged in at least two rows that are offset with respect to one another to form the radiation-reflecting luminous area.

11. The illumination device according to claim 3 , wherein a surface of each radiation-reflecting area is formed in structured fashion.

12. The illumination device according to claim 11 , wherein the surface of each radiation-reflecting area has a groove, a step or an edge structure.

13. The illumination device according to claim 1 , wherein the radiation reflectors are arranged in a honeycomb pattern.

14. The illumination device according to claim 13 , wherein each radiation reflector includes a hexagonal opening from which reflected light emerges.

15. The illumination device according to claim 1 , wherein the at least two radiation reflectors overlap in imbricated fashion.

16. The illumination device according to claim 1 , wherein each radiation reflector includes a triangular opening from which reflected light emerges.

17. The illumination device according to claim 1 , wherein each radiation reflector includes a rectangular opening from which reflected light emerges.

18. The illumination device according to claim 16 , wherein each of the radiation reflectors is formed in pyramidal fashion.

19. The illumination device according to claim 1 , wherein the at least one light source comprises a light-emitting diode.

20. The illumination device according to claim 19 , wherein the light-emitting diode has a directional emission in a direction of the radiation reflector.

21. The illumination device according to claim 1 , wherein the radiation reflectors are combined to form the radiation-reflecting luminous area by means of brackets.

22. The illumination device according to claim 1 , further comprising at least one display object arranged in front of the radiation-reflecting luminous area.

23. The illumination device of claim 1 , wherein light which is emitted by the at least one light source does not travel on a straight line along the direction perpendicular to the first plane of the radiation-reflecting luminous area to an object to be illuminated or to be backlit by the illumination device.

24. The illumination device of claim 1 , wherein light which is emitted by the at least one light source and travelling along the direction perpendicular to the first plane of the radiation-reflecting luminous area to an object to be illuminated or to be backlit by the illumination device has been reflected at least once.

25. A method of illuminating an object, the method comprising:

providing an illumination device comprising a plurality of radiation reflectors that are each irradiated by a respective light source, wherein the radiation reflectors are arranged modularly to form a radiation-reflecting luminous area extending along a first plane;

generating light from light sources to irradiate the radiation reflectors; and

reflecting the light off of the radiation-reflecting luminous area in a first direction substantially perpendicular to the first plane and toward the object so as to illuminate the object;

wherein at least two radiation reflectors overlap laterally in places along the first plane; and

wherein one of the at least two radiation reflectors covers over the respective light source that illuminates the other radiation reflector, when viewed along the first direction; and

wherein reflecting the light comprises backlighting a display panel or backlighting a display.

26. The method according to claim 25 , wherein the illumination device is spaced from the object by a distance of less than 50 mm.

27. The method according to claim 25 , wherein no light is directly emitted towards the object.

28. A display apparatus comprising:

an illumination device comprising a plurality of radiation reflectors that are each irradiated by a respective light source, wherein the radiation reflectors are arranged modularly to form a radiation-reflecting luminous area, wherein at least two radiation reflectors overlap laterally in places along the radiation-reflecting luminous area and wherein one of the at least two radiation reflectors covers over the respective light source that illuminates the other radiation reflector when viewed along a direction perpendicular to the radiation-reflecting luminous area; and

a display or display panel adjacent the illumination device.

29. The apparatus according to claim 28 , wherein the apparatus has a structural height of less than or equal to 50 mm.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 23, 2009
From: KIRCHBERGER, GUENTER; PLOETZ, LUDWIG; ZEILER, MARKUS; OTT, HUBERT
To: OSRAM OPTO SEMICONDUCTORS GMBH
Reel/Frame 023417/0251 →
Priority Claims (1)
DE 10 2007 007 353 · Feb 14, 2007 · national
Continuity (1)
Related Publication 20100033956A1 · Feb 11, 2010