LED lighting fixture

• US 8,297,798 B1
• Filed: 04/16/2010
• Issued: 10/30/2012
• Est. Priority Date: 04/16/2010
• Status: Expired due to Fees

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Cooper Technologies Company (Eaton Corporation PLC.)
• Inventors: Pittman, Chantal Louise, Reo, Ann Marie
• Primary Examiner(s): Husar, Stephen F
• Assistant Examiner(s): CRANSON JR, JAMES W
• Application Number:
  US12/761,990
• Time in Patent Office: 928 Days
• Field of Search: 362/241, 362/247, 362/296.01, 362/296.05, 362/294, 362/297, 362/373
• US Class Current: 362/296.05
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21V 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21V 7/0016 on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
• CPC Class Codes: F21V 7/04 Optical design
• CPC Class Codes: F21V 7/24 characterised by the material
• CPC Class Codes: F21V 7/28 characterised by coatings
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An lighting fixture includes a reflector, a pedestal, and a lighting module. The reflector includes an opening formed therethrough and the pedestal is positioned in communication with the opening. The lighting module is coupled to the pedestal. In certain embodiments, the reflector is organically shaped and includes four parts, where each part is substantially S-shaped. The lighting module includes a frame and indirect LEDs that emit light toward the interior surface of the reflector. The indirect LEDs are positioned below the lowest portions of the reflector a are positioned at an angle with respect to a horizontal axis. The frame includes a cut-off wall that provides for a cut-off angle for the indirect LEDs and one or more fins. The frame and the pedestal provide thermal management for the LEDs. In certain embodiments, the lighting module also includes one or more of direct LEDs and an active cooling module.

Claims

1. A light fixture, comprising:

an organic reflector comprising a first part, a second part, a third part, and a fourth part, the first part being coupled adjacent the second part and the fourth part and positioned opposite the third part, the second part being coupled adjacent the first part and the third part and positioned opposite the fourth part;

the third part being coupled adjacent the second part and the fourth part and positioned opposite the first part, and the fourth part being coupled adjacent the first part and the third part and positioned opposite the second part, each part collectively forming an opening in the center of the reflector;

a pedestal positioned in communication with the opening; and

a light module coupled to the pedestal, the light module emitting light from a light source to a desired illumination area,

wherein each part of the organic reflector is substantially S-shaped.

2. The light fixture of claim 1, wherein the light source comprises indirect light emitting diodes (“

LEDs”

).

3. The light fixture of claim 2, wherein the indirect LEDs are positioned below the lowest portions of each of the parts of the reflector.

4. The light fixture of claim 2, wherein the light source further comprises direct LEDs.

5. The light fixture of claim 1, further comprising a bracket extending from a portion of the first part to a portion of the third part adjacent the exterior surface of the reflector, the bracket comprising an aperture therein, the aperture being positioned above the opening, wherein the pedestal is coupled to the bracket and extends through the opening.

6. The light fixture of claim 1, wherein the light module comprises:

a frame comprising;

a top surface;

a bottom surface;

an intermediate edge positioned at a vertical elevation that is between the vertical elevations of the top surface and the bottom surface;

an indirect LED mounting platform located adjacent to the intermediate edge, the indirect LED mounting platform comprising an inner edge and an outer edge, the inner edge positioned at a vertical elevation that is higher than the vertical elevation of the outer edge;

a cut-off wall extending from the outer edge to the intermediate edge; and

one or more fins coupled to the cut-off wall and the indirect LED mounting platform and extending to the top surface and the bottom surface,

wherein the light source comprises one or more indirect LEDs coupled to the indirect LED mounting platform, the indirect LEDs emitting light towards the interior surface of the reflector, and

wherein the cut-off wall forms a cut-off angle of the indirect LEDs.

7. The light fixture of claim 6, wherein the cut-off angle ranges between about twenty-five degrees and about fifty degrees.

8. The light fixture of claim 6, wherein the light source further comprises one or more direct LEDs, wherein the bottom surface includes a direct LED mounting platform facing the desired illumination surface, and wherein the direct LEDs are coupled to the direct LED mounting platform and emit light towards the desired illumination surface.

9. The light fixture of claim 8, further comprising a lens coupled to the direct LED mounting platform, the lens positioned over the direct LEDs.

10. The light fixture of claim 6, further comprising one or more active cooling devices coupled to the frame, the active cooling device providing thermal management across the fins.

11. The light fixture of claim 10, further comprising a driver electrically coupled to and supplying power to at least the indirect LEDs and the active cooling device.

12. The light fixture of claim 6, wherein the indirect LED mounting platform is positioned at an angle ranging from about twenty degrees to about eighty degrees.

13. The light fixture of claim 1, wherein the light module is rotatably coupleable to the pedestal.

14. The light fixture of claim 1, wherein the light module and the pedestal perform thermal management of the heat emitted from the light source.

15. A light fixture, comprising:

a reflector comprising an opening therethrough;

a pedestal positioned in communication with the opening; and

a light module coupled to the pedestal, the light module comprising;

a frame comprising;

a top surface;

a bottom surface;

an intermediate edge positioned at a vertical elevation that is between the vertical elevations of the top surface and the bottom surface;

an indirect LED mounting platform located adjacent to the intermediate edge, the indirect LED mounting platform comprising an inner edge and an outer edge, the inner edge positioned at a vertical elevation that is higher than the vertical elevation of the outer edge;

a cut-off wall extending from the outer edge to the intermediate edge; and

one or more fins coupled to the cut-off wall and the indirect LED mounting platform and extending to the top surface and the bottom surface; and

one or more indirect LEDs coupled to the indirect LED mounting platform, the indirect LEDs emitting light towards the interior surface of the reflector, and

wherein the cut-off wall forms a cut-off angle of the indirect LEDs, and

wherein the light module and the pedestal perform thermal management of the heat emitted from the indirect LEDs.

16. The light fixture of claim 15, wherein the cut-off angle ranges between about twenty-five degrees and about fifty degrees.

17. The light fixture of claim 15, wherein the light module further comprises one or more direct LEDs, wherein the bottom surface includes a direct LED mounting platform facing a desired illumination surface, and wherein the direct LEDs are coupled to the direct LED mounting platform and emit light towards the desired illumination surface.

18. The light fixture of claim 17, wherein the light module further comprises a lens coupled to the direct LED mounting platform, the lens positioned over the direct LEDs.

19. The light fixture of claim 15, wherein the light module further comprises one or more active cooling devices coupled to the frame, the active cooling device providing thermal management of the fins.

20. The light fixture of claim 19, further comprising a driver electrically coupled to and supplying power to at least the indirect LEDs and the active cooling device.

21. The light fixture of claim 15, wherein the indirect LED mounting platform is positioned at an angle ranging from about twenty degrees to about eighty degrees.

22. The light fixture of claim 15, wherein the light module is rotatably coupleable to the pedestal.

23. The light fixture of claim 15, wherein the reflector is organically shaped and comprises a first part, a second part, a third part, and a fourth part, the first part being coupled adjacent the second part and the fourth part and positioned opposite the third part, the second part being coupled adjacent the first part and the third part and positioned opposite the fourth part;

the third part being coupled adjacent the second part and the fourth part and positioned opposite the first part, and the fourth part being coupled adjacent the first part and the third part and positioned opposite the second part, each part collectively forming the opening, wherein each part of the organic reflector is substantially S-shaped.

24. The light fixture of claim 15, wherein the indirect LEDs are positioned below the lowest portion of the reflector.

25. The light fixture of claim 15, further comprising a bracket coupled to the reflector and extending across the reflector adjacent the exterior surface of the reflector, the bracket comprising an aperture therein, the aperture being positioned above the opening, wherein the pedestal is coupled to the bracket and extends through the opening.

26. A light fixture, comprising:

an organic reflector comprising a first part, a second part, a third part, and a fourth part, the first part being coupled adjacent the second part and the fourth part and positioned opposite the third part, the second part being coupled adjacent the first part and the third part and positioned opposite the fourth part;

the third part being coupled adjacent the second part and the fourth part and positioned opposite the first part, and the fourth part being coupled adjacent the first part and the third part and positioned opposite the second part, each part collectively forming an opening in the center of the reflector;

a pedestal positioned in communication with the opening; and

a light module coupled to the pedestal, the light module comprising;

a frame comprising;

a top surface;

a bottom surface;

an intermediate edge positioned at a vertical elevation that is between the vertical elevations of the top surface and the bottom surface;

an indirect LED mounting platform located adjacent to the intermediate edge, the indirect LED mounting platform comprising an inner edge and an outer edge, the inner edge positioned at a vertical elevation that is higher than the vertical elevation of the outer edge;

a cut-off wall extending from the outer edge to the intermediate edge; and

one or more fins coupled to the cut-off wall and the indirect LED mounting platform and extending to the top surface and the bottom surface; and

one or more indirect LEDs coupled to the indirect LED mounting platform, the indirect LEDs emitting light towards the interior surface of the reflector, the indirect LEDs being positioned below the lowest portion of the reflector,

wherein the cut-off wall forms a cut-off angle of the indirect LEDs ranging between about twenty-five degrees and about fifty degrees,

wherein each part of the organic reflector is substantially S-shaped, and

wherein the light module and the pedestal perform thermal management of the heat emitted from the indirect LEDs.

27. The light fixture of claim 26, wherein the light module further comprises one or more direct LEDs, wherein the bottom surface includes a direct LED mounting platform facing a desired illumination surface, and wherein the direct LEDs are coupled to the direct LED mounting platform and emit light towards the desired illumination surface.

28. The light fixture of claim 27, wherein the light module further comprises a lens coupled to the direct LED mounting platform, the lens positioned over the direct LEDs.

29. The light fixture of claim 26, wherein the light module further comprises one or more active cooling devices coupled to the frame, the active cooling device providing thermal management of the fins.

30. The light fixture of claim 29, further comprising a driver electrically coupled to and supplying power to at least the indirect LEDs and the active cooling device.