LUMINAIRE WITH LED ILLUMINATION CORE

• US 20100208460A1
• Filed: 02/18/2010
• Published: 08/19/2010
• Est. Priority Date: 02/19/2009
• Status: Abandoned Application

• Current Assignee: Cooper Technologies Company (Eaton Corporation PLC.)
• Original Assignee: Cooper Technologies Company (Eaton Corporation PLC.)
• Inventors: Lehman, Gregg, Ladewig, Christopher
• Application Number:
  US12/708,389
• Publication Number:
  US 20100208460A1
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21V 29/51 using condensation or evaporation of a fluid, e.g. heat pipes
• CPC Class Codes: F21V 29/60 characterised by the use of a forced flow of gas, e.g. air
• CPC Class Codes: F21V 29/717 using split or remote units thermally interconnected, e.g. by thermally conductive bars or heat pipes
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 29/777 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2107/30 on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A luminaire includes a housing, at least one core member coupled to the housing, at least one LED positioned on the core member, and at least one heat sink thermally coupled to the LEDs. The core member includes a first end, a second end, and a body extending from the first end to the second end. The body'"'"'s outer surface includes one or more receiving surfaces spaced apart and operable to receive one or more LEDs. LEDs can be added, removed, or repositioned on the receiving surfaces to change the light distribution. The cooling system includes either an integral heat sink, an external heat sink, or both. The core member is designed to increase lighting efficiency by directing more light away from a direction opposite the intended area of illumination.

Claims

1. A luminaire, comprising:

a housing comprising an inner surface and an exterior surface;

at least one core member coupled to and disposed along the inner surface of the housing, the core member comprising;

a first end;

a second end;

a body extending between the first end and the second end; and

at least one receiving surface spaced along at least a portion of an outer surface of the body, the receiving surface operable to receive a plurality of light emitting diodes (“

LEDs”

);

at least one LED, wherein each LED is coupled to one of the receiving surfaces; and

at least one heat sink thermally coupled to the LEDs.

2. The luminaire of claim 1, wherein the core member is integrally formed with the inner surface of the housing.

3. The luminaire of claim 1, wherein the heat sink is integrally formed with the housing and the core member and disposed along the exterior surface of the housing.

4. The luminaire of claim 3, wherein the heat sink comprises one or more fins extending along the exterior surface of the housing, the fins being positioned adjacent and in thermal communication with the body.

5. The luminaire of claim 4, wherein the fins extend longitudinally along at least a potion of the length of the housing.

6. The luminaire of claim 3, further comprising at least one active cooling module, each active cooling module being coupled to, and generating an air flow along the heat sink.

7. The luminaire of claim 1, wherein the heat sink comprises an external heat sink, the external heat sink comprising at least one heat pipe comprising a first end disposed within the body of the core member and extending from the core member to a distal second end outside of the body of the core member.

8. The luminaire of claim 7, wherein at least a portion of each heat pipe is surrounded by an inside surface of the body of the core member.

9. The luminaire of claim 7, wherein the external heat sink further comprises one or more sheet fins in thermal communication with the heat pipe and disposed outside of the body of the core member.

10. The luminaire of claim 9, wherein the luminaire is coupled to a mounting structure comprising an arm, the sheet fins being coupled with the arm, wherein outer circumference of the sheet fins is similar to the outer circumference of the arm.

11. The luminaire of claim 7, further comprising at least one active cooling module, each active cooling module being coupled to, and generating an air flow along the external heat sink.

12. The luminaire of claim 1, wherein the inner surface of the housing is reflective.

13. The luminaire of claim 1, further comprising at least one lens disposed between the LEDs and an area being illuminated.

14. The luminaire of claim 1, wherein the outer surface of the core member extends substantially radially forming an angle ranging between about five degrees and about 240 degrees.

15. A method for adjusting an optical distribution of a luminaire, comprising the steps of:

providing the luminaire comprising;

a housing comprising an inner surface and an exterior surface;

at least one core member coupled to and disposed along the inner surface of the housing, the core member comprising;

a first end;

a second end;

a body extending between the first end and the second end; and

at least one receiving surface spaced along at least a portion of an outer surface of the body, the receiving surface operable to receive a plurality of light emitting diodes (“

LEDs”

);

at least one LED, wherein each LED is coupled to one of the receiving surfaces; and

at least one heat sink thermally coupled to the LEDs, and adjusting an optical distribution of the luminaire by at least one of;

removing at least one of the LEDs from its respective receiving surface;

repositioning at least one of the LEDs with respect to its respective receiving surface; and

coupling at least one additional LED to at least one of the receiving surfaces.

16. The method of claim 15, wherein the core member is integrally formed with the inner surface of the housing.

17. The method of claim 15, wherein the heat sink is integrally formed with the housing and the core member and disposed along the exterior surface of the housing.

18. The method of claim 15, wherein the heat sink comprises an external heat sink, the external heat sink comprising at least one heat pipe comprising a first end disposed within the body of the core member and extending from the core member to a distal second end outside of the body of the core member.

19. The method of claim 18, wherein the external heat sink further comprises one or more sheet fins in thermal communication with the heat pipe and disposed outside of the body of the core member.

20. The method of claim 15, wherein the outer surface of the core member extends substantially radially forming an angle ranging between about five degrees and about 240 degrees.

21. A luminaire, comprising:

a housing comprising an interior surface and an opposing exterior surface;

at least one core member coupled to and disposed along the interior surface of the housing, each core member comprising;

a first end;

a second end;

a longitudinally extending body comprising an arc-shaped outer surface extending between the first end and the second end; and

at least one receiving surface spaced along at least a portion of the outer surface, the receiving surfaces being operable to receive a plurality of light emitting diodes (“

LEDs”

);

at least one LED, wherein each LED is coupled to one of the receiving surfaces; and

at least one heat sink, wherein at least a portion of the heat sink is integrally formed with and disposed along a top surface of the core member and in thermal communication with the LEDs.

22. The luminaire of claim 21, wherein the core member is integrally formed with the inner surface of the housing.

23. The luminaire of claim 21, wherein at least a second portion of the heat sink is integrally formed with and extends upward from the top surface of the housing.

24. The luminaire of claim 21, wherein the outer surface of the body extends substantially radially forming an angle between 150 and 190 degrees.

25. The luminaire of claim 21, wherein the heat sink comprises one or more fins extending along the exterior surface of the housing.

26. The luminaire of claim 21, wherein the luminaire comprises a second heat sink comprising at least one heat pipe comprising a first end extending through at least a portion of the body of the core member and a second distal end disposed outside of the body of the core member.

27. The luminaire of claim 26, further comprising one or more heat sink fins disposed outside of the body of the core member and in thermal communication with at least one heat pipe.