Facade light comprising light-emitting diodes

Patent metadata

Field	Value
Publication number	US-9464766-B2
Application number	US-201213985225-A
Country	US
Kind code	B2
Filing date	Feb 17, 2012
Priority date	Feb 18, 2011
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

A facade light having a housing for accommodating a lighting device, operating devices and terminals, including light-emitting diodes as the lighting device and lenses for distributing the light emitted by the light-emitting diodes, wherein at least two light-emitting diodes are combined to form LED clusters ( 1 ) and a lens ( 2 ) is assigned to each LED cluster. The light emitted by the light-emitting diodes of the LED cluster passes through the lens, which is configured in such a way that it generates an elliptical distribution of light. The housing is divided into at least two sections, the first section having space for operating devices and a second section, to the side, containing at least one LED cluster and each LED cluster being coupled to a device for dissipating the heat that arises during operation.

First claim

The invention claimed is:

1. A facade light comprising;
a longitudinally elongated housing for receiving lighting operating devices and terminals, light-emitting diodes and optical systems for distributing the light emitted by the light-emitting diodes, wherein at least two light-emitting diodes are combined to form each of a plurality of LED clusters, each of the LED clusters is assigned to one of the optical systems, the light emitted by the light-emitting diodes of the LED clusters passing through the optical systems which are designed in such a way that it produces a longitudinally extending elliptical light distribution pattern on a facade to be illuminated,
wherein the plurality of LED clusters are longitudinally arranged next to one another, substantially along a straight line which runs parallel to the longitudinal direction of the housing and a longitudinal axis of the elliptical light distribution pattern,
wherein the housing is in its longitudinal direction divided into at least two sections, space for the lighting operating devices being provided in a first lateral section and space for the plurality of LED clusters being arranged in a second lateral section, and in that each LED cluster is coupled to means for dissipating heat produced during the operation of the LED clusters, and
wherein air gaps for further dissipating the heat produced during the operation of the LED clusters are formed in the housing, said air gaps being formed by longitudinally elongated air slits located adjacent to each other on opposed longitudinal sides of the housing between a receiving region for the plurality of LED clusters and a peripheral housing wall.

2. The facade light as claimed in claim 1 , wherein the housing consists of a lower housing part and an upper housing part and in that the lower housing part is preferably configured as a heat sink.

3. The facade light as claimed in claim 2 , wherein the upper housing part is plastic, having polycarbonate lightproof regions and polymethyl methacrylate light-transmissive regions forming covering elements.

4. The facade light as claimed in claim 3 , wherein the upper housing part is a unitary part produced by a two-component injection-molding process.

5. The facade light as claimed in claim 2 , wherein the lower housing part is an aluminum diecasting.

6. The facade light as claimed in claim 2 , wherein the lower housing part has a peripheral web and in that a peripheral seal is arranged on the peripheral web.

7. The facade light as claimed in claim 2 , wherein the upper housing part is fastened to the lower housing part by a snap connection in such a way that the upper housing part is pressed against a seal.

8. The facade light as claimed in claim 1 , wherein the housing is divided into three sections, a first lateral section a middle section and a third lateral section, the first lateral section and the third lateral section being respectively arranged at longitudinally opposed sides of the middle section.

9. The facade light as claimed in claim 8 , wherein two LED clusters are respectively arranged in the first and third lateral sections.

10. The facade light as claimed in claim 8 , wherein the means for dissipating the heat comprises a heat sink formed in one piece, and having three sections, a first heat sink section connected in a heat-conducting manner to a printed circuit board arranged in the first lateral section of the housing and in a second heat sink section bridges the space for the lighting operating devices and, in the second lateral section of the housing, is connected in a heat-conducting manner to a printed circuit board arranged in a third lateral section of the housing.

11. The facade light as claimed in claim 1 , wherein the means for dissipating the heat comprises a heat sink, and in the lateral section or sections the LED clusters are assigned a heat sink.

12. The facade light as claimed in claim 11 , wherein the light-emitting diodes are arranged on a first side of a metal-core printed circuit board having a heat-conducting connection with the heat sink on the side that is opposite from the first side.

13. The facade light as claimed in claim 11 , wherein the heat sink has in the region of the lateral sections cooling ribs which rise up from one side of a base, in that a height of the cooling ribs corresponds approximately to a depth of the space that is provided for receiving operating devices and in that a side of the base opposite from the side which serves as a contact area between the printed circuit board and the heat sink.

14. The facade light as claimed in claim 11 , wherein the heat sink forms in the first lateral section a space for receiving operating devices or terminals that is closed on all sides with the exception of the upper side.

15. The facade light, as claimed in claim 1 , wherein the housing consists of an upper housing part and a lower housing part, wherein the lower housing part has a peripheral web and in that a peripheral seal is arranged on the peripheral web, wherein the upper housing part is fastened to the lower housing part by means of a snap connection in such a way that the upper housing part is pressed against the seal.

16. The light as claimed in claim 15 , wherein the snap connection is realized by the upper housing part engaging laterally over the lower housing part or engaging in air slits formed on the lower housing part and in that the lateral regions of the upper housing part are provided with clearances into which snap lugs engage when the lower housing part is closed by the upper housing part, the snap lugs being integrally formed on the lower housing part.

17. The facade light as claimed in claim 1 , wherein the light-emitting diodes and the associated control unit operate at a low-voltage.

Assignees

• Clauss Bernd
• Eberle Daniel
• Rüf Karl-Heinz
• Roos Peter
• Zumtobel Lighting Gmbh

Inventors

• Clauss Bernd
• Eberle Daniel
• Rüf Karl-Heinz
• Roos Peter

Classifications

• F21W2131/107

  of the exterior of buildings · CPC title

• F21V17/164

  the parts being subjected to bending, e.g. snap joints · CPC title

• F21V15/013 Primary

  the housing being an extrusion · CPC title

• F21V29/507

  of means for protecting lighting devices from damage, e.g. housings · CPC title

• F21V29/508

  of electrical circuits · CPC title