Arrangement for outputting light with punctiform light sources and light deflection element

Patent metadata

Field	Value
Publication number	US-9316378-B2
Application number	US-201214128929-A
Country	US
Kind code	B2
Filing date	Jun 26, 2012
Priority date	Jun 29, 2011
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

An arrangement for outputting light is provided, having a plurality of punctiform light sources and a light deflection element with a boundary face and/or a boundary face section, which boundary face or boundary face section is arranged in the beam path of the light of both a first light source and of a second light source. In this context, the boundary face or the boundary face section forms a light input face for the light of the first light source into the light deflection element and at the same time forms a reflective face for the light of the second light source.

First claim

The invention claimed is:

1. An arrangement for emitting light, comprising:
a plurality of spaced apart essentially point light sources, and
a light directing element having a bounding surface which is arranged in the beam path of the light of both a first light source and an adjacent second light source, wherein
the bounding surface forms a light entry surface for the light of the first light source into the light directing element, and the bounding surface simultaneously forms an internal reflection surface for the light of the second light source.

2. The arrangement for emitting light as claimed in claim 1 , wherein the light directing element comprises cavities, in each of which one of the light sources is arranged, the bounding surface preferably forming a bounding surface of a cavity, in particular at least a part of the lateral surface of the cavity.

3. The arrangement for emitting light as claimed in claim 2 , wherein each cavity comprises a lens region, which is preferably shaped frustoconically, extending from the bottom surface in the direction of the light source and separated from the lateral surface.

4. The arrangement for emitting light as claimed in claim 3 , wherein the top surface of the lens region is shaped concavely or convexly.

5. The arrangement for emitting light as claimed in claim 3 , wherein the top surface of the lens region has a depression.

6. The arrangement for emitting light as claimed in claim 2 , wherein light exit surfaces of the light directing element which lie opposite the cavities are formed in the manner of lenses, and in particular are shaped concavely or convexly.

7. The arrangement for emitting light as claimed in claim 2 , wherein the cavities have a polygonal base surface or a polygonal surface projection.

8. The arrangement for emitting light as claimed in claim 1 , wherein reflection of the light of the second light source at the bounding surface takes place by total internal reflection.

9. The arrangement for emitting light as claimed in claim 1 , wherein the light emission of the arrangement for emitting light is homogeneous, the light directing element preferably being formed in order to collimate the light of the light sources.

10. The arrangement for emitting light as claimed in claim 1 , wherein the bounding surface is formed in a planar fashion.

11. The arrangement for emitting light as claimed in claim 1 , wherein the bounding surface is curved, in particular parabolically.

12. The arrangement for emitting light as claimed in claim 1 , wherein the light sources are arranged in a row or a two-dimensional grid.

13. The arrangement for emitting light as claimed in claim 1 , wherein the light sources are arranged on a common support element, which is preferably planar.

14. The arrangement for emitting light as claimed in claim 1 , wherein it comprises a plurality of light sources having mutually different light output, and in particular a different color spectrum or different color temperature, which are preferably arranged in a regular grid.

15. A light directing element for influencing the light of at least two essentially point light sources arranged next to one another, having a bounding surface which is arranged in the beam path of the light of both the first light source and the second light source, wherein the bounding surface forms a light entry surface for the light of the first light source into the light directing element and the bounding surface simultaneously forms a reflection surface for the light of the second light source on its side facing away from the light entry surface.

16. A method for producing a light directing element for an arrangement for emitting light as claimed in one of the preceding claims comprising the following steps:
producing, in particular injection-molding, an essentially planar light directing element,
shaping the light directing element, in particular by cutting, so that a desired shape of the light directing element is obtained.

Assignees

• Ebner Stephan
• Zumtobel Lighting Gmbh

Inventors

• Ebner Stephan

Classifications

• G02B19/0028

  refractive and reflective surfaces, e.g. non-imaging catadioptric systems · CPC title

• G02B27/0961

  Lens arrays (lens arrays per se G02B3/0006) · CPC title

• F21V7/00

  Reflectors for light sources (characterised by cooling arrangements F21V29/505) · CPC title

• G02B19/0066

  in the form of an LED array · CPC title

• G02B5/0278

  used in transmission · CPC title