LED lighting fixture

• US 7,824,070 B2
• Filed: 03/22/2007
• Issued: 11/02/2010
• Est. Priority Date: 03/22/2007
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Chen, Yuming, Coleman, Carleton, Higley, Robert
• Primary Examiner(s): O'Shea; Sandra L
• Assistant Examiner(s): ALLEN, DANIELLE NICOLE
• Application Number:
  US11/689,614
• Publication Number:
  US 20080231201A1
• Time in Patent Office: 1,321 Days
• Field of Search: 362/612, 362/555, 362/84, 362/184, 362/217.01, 362/218, 362/249.02, 362/311.02, 362/345, 362/800, 362/294, 362/373, 362/249, 362/545, 362/547, 362/221, 362/224, 362/225, 362/362, 362/227, 313/1, 345/46, 345/82, 345/44, 345/55
• US Class Current: 362/249.02
• CPC Class Codes: F21S 2/005 of modular construction
• 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 23/008 the casing being outside the housing of the lighting device
• CPC Class Codes: F21V 23/026 Fastening of transformers or ballasts
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A light-emitting diode (LED) lighting fixture is provided as a potential solid state lighting (SSL) replacement fixture for a conventional HID lamp fixture. The LED lighting fixture includes a main housing having a bottom surface supporting an array of LEDs, a top surface and sides, and at least one driver provided in a side housing attached to a side of the main housing to drive the LED array. The thickness of the side housing is equal to or greater than the thickness of the main housing. A plurality of heat spreading fins is arranged on the top surface of the main housing.

Claims

1. A light emitting diode (LED) lighting fixture, comprising:

a main housing comprising a bottom surface supporting an array of LEDs, a top surface and at least two side edges,

two or more side housings, each side housing attached to an opposite side edge of the main housing; and

at least one driver provided in each side housing to drive the LED array.

2. The fixture of claim 1, wherein a cross-sectional thickness of the fixture is 4.0 inches or less and the total light output of the fixture is at least 15,000 lumens.

3. The fixture of claim 1, wherein a cross-sectional thickness of the fixture is 4.0 inches or less and the light output per square inch of the LED array is at least 40 lumens/in.².

4. The fixture of claim 1, wherein the side housing is curved along one side thereof.

5. The fixture of claim 1, wherein the LED array comprises a plurality of PCB strips attached to the main housing bottom surface, each PCB strip including a plurality of serially-connected LEDs thereon.

6. The fixture of claim 5, wherein one or more LEDs or one or more strips of LEDs in the array are fitted with a secondary optic.

7. The fixture of claim 5, wherein one or more LEDs or one or more strips of LEDs in the array are mounted at an angle to the bottom surface of the main housing.

8. The fixture of claim 7, wherein the angle is variable for one or more strips of LEDs.

9. The fixture of claim 5, wherein the average light output of each LED in the array is at least 80 lumens, and the total light output of the fixture is at least 15,000 lumens.

10. The fixture of claim 5, wherein the average light output of each LED in the array is at least 100 lumens, and the total light output of the fixture is at least 15,000 lumens.

11. The fixture of claim 5, wherein one or more LEDs in the array or one or more strips of LEDs are configured to output different colored light.

12. The fixture of claim 1,

wherein a cross-sectional thickness of the fixture is 4.0 inches or less.

13. The fixture of claim 12, wherein the at least one power supply is a constant current driver configured to provide a voltage between 90 to 240 volts.

14. The fixture of claim 12, further comprising:

a plurality of heat spreading fins arranged on a top surface of the main housing.

15. The fixture of claim 12, wherein the LED array comprises a plurality of PCB strips attached to a bottom surface of the main housing, each PCB strip including a plurality of serially-connected LEDs thereon.

16. The fixture of claim 15, wherein one or more LEDs or one or more strips of LEDs in the array are fitted with a secondary optic.

17. The fixture of claim 15, wherein one or more LEDs or one or more strips of LEDs in the array are mounted at an angle to the bottom surface of the main housing.

18. The fixture of claim 15, wherein one or more LEDs in the array or one or more strips of LEDs are configured to output different colored light.

19. The fixture of claim 1,

wherein the light output per square inch of the LED array is at least 40 lumens/in.².

20. The fixture of claim 19, wherein a thickness of the side housing is equal to or greater than a thickness of the main housing.

21. The fixture of claim 19, wherein the total light output of the fixture is at least 15,000 lumens.

22. The fixture of claim 19, further comprising:

a plurality of heat spreading fins arranged on a top surface of the main housing.

23. The fixture of claim 22, wherein the LED array comprises a plurality of PCB strips attached to a bottom surface of the main housing, each PCB strip comprising a plurality of serially-connected LEDs thereon.

24. The fixture of claim 23, wherein one or more LEDs or one or more strips of LEDs in the array are fitted with a secondary optic.

25. The fixture of claim 23, wherein one or more LEDs or one or more strips of LEDs in the array are mounted at an angle to the bottom surface of the main housing.

26. The fixture of claim 23, wherein one or more LEDs in the array or one or more strips of LEDs are configured to output different colored light.

28. The fixture of claim 1, further comprising:

a plurality of heat spreading fins arranged on a top surface of the main housing.

27. A compact light-emitting diode (LED) lighting fixture, comprising:

a main housing comprising a bottom surface supporting an array of LEDs, a top surface and sides,

a driver provided to drive the LED array; and

a plurality of heat spreading fins arranged between the top surface of the main housing and the driver, such that the heat spreading fins provide heat dissipation to both the LEDs and the driver.