Adjustable retrofit LED troffer

• US 10,012,354 B2
• Filed: 06/26/2015
• Issued: 07/03/2018
• Est. Priority Date: 06/26/2015
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Bernard, Randy, Trott, Gary, Snell, Nathan, Dungan, William L.
• Primary Examiner(s): Ton, Anabel
• Application Number:
  US14/752,684
• Publication Number:
  US 20160377261A1
• Time in Patent Office: 1,103 Days
• 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 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• CPC Class Codes: F21V 15/015 Devices for covering joints between adjacent lighting devices; End coverings
• CPC Class Codes: F21V 17/02 with provision for adjustment F21V17/04 - F21V17/08 take precedence
• CPC Class Codes: F21V 17/104 using feather joints, e.g. tongues and grooves, with or without friction
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 23/02 the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21V 7/005 with an elongated shape to cooperate with linear light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A direct troffer-style fixture for solid state light sources for use in these fixtures. Embodiments of the present invention provide a direct troffer-style fixture that is particularly well-suited for retrofit structures. The fixture comprises a retrofit troffer assembly that is removably attached within a T grid or pan structure. The retrofit fixture can be installed in two pieces: a first including a lens structure, a back reflector and 2 end reflectors; and the second component including a second portion of the back reflector. An interior space created by the lens structure houses light emitters and in some embodiments, a light engine and/or additional electronics. One or both of the end reflectors may be movable, slidable and/or rotatable, to accommodate installation. The back reflector covers most of the interior surfaces of the troffer fixture to direct more light out of the fixture.

Claims

1. A light fixture, comprising:

a plurality of light sources;

a lens over said plurality of light sources;

first and second end reflectors, wherein at least one of said end reflectors fits around said lens such that it is movable along said lens; and

at least one movable back reflector between said first and second end reflectors.

2. The fixture of claim 1, wherein said back reflector comprises at least two reflectors, wherein a first of said back reflectors is on a first side of said plurality of light sources and a second of said back reflectors is on a second opposite side of said plurality of light sources.

3. The fixture of claim 2, wherein at least one of said first and second back reflectors is stationary.

4. The fixture of claim 1, wherein said movable end reflector can slide along said lens.

5. The fixture of claim 1, wherein said back reflector has a white reflective surface.

6. The fixture of claim 1, wherein said end reflector has a white reflective surface.

7. The fixture of claim 1, wherein a portion of said lens allows light to pass through and at least another portion of said lens is reflective.

8. The fixture of claim 1, further comprising a light board, wherein said plurality of light sources are on said light board and wherein said light board is removably attached to said lens.

9. The fixture of claim 1, wherein a portion of said lens comprises an interior compartment and said interior compartment is separated by a barrier from the remainder of the interior of said lens.

10. The fixture of claim 9, wherein a driver circuit is housed in said interior compartment.

11. The fixture of claim 9, further comprising a circuit isolation structure in said interior compartment.

12. The fixture of claim 1, further comprising at least one end cap at an end of said lens, said end cap defining an interior compartment for housing electronic components.

27. The fixture of claim 1, wherein said movable end reflector can rotate about said lens.

13. A light fixture, comprising:

first and second end reflectors, wherein at least one of said end reflectors is configured to define an interior compartment;

at least one back reflector between said first and second end reflectors;

a plurality of light sources, wherein said plurality of light sources are oriented to output light in the same direction as said fixture; and

a lens over said plurality of light sources, wherein at least one of said end reflectors is movable along said lens.

14. The fixture of claim 13, wherein said plurality of light sources are between said first and second end reflectors.

15. The fixture of claim 13, wherein said back reflector comprises at least two back reflectors, wherein a first of said back reflectors is on a first side of said plurality of light sources and a second of said back reflectors is on a second opposite side of said plurality of light sources.

16. The fixture of claim 13, wherein said movable end reflector can slide along said lens.

17. The fixture of claim 13, wherein said lens has uniform diffusion properties.

18. The fixture of claim 13, wherein a driver circuit is housed in said interior compartment.

19. The fixture of claim 13, further comprising a light board, wherein said plurality of light sources are on said light board and wherein said light board is removably attached to said fixture, wherein said back reflector is angled such that it is not parallel to said light board.

20. The fixture of claim 13, wherein said plurality of light sources are distributed within a plurality of light emitter clusters, each cluster comprising discrete light emitters, such that each light emitter within a cluster is spaced a first distance from other light emitters within a cluster, and each cluster is spaced a second distance from other clusters.

21. The fixture of claim 13, wherein said plurality of light sources are evenly distributed.

28. The fixture of claim 13, wherein said movable end reflector can rotate about said lens.

22. A light fixture, comprising:

a first and second component, wherein said first component comprises;

first and second end reflectors;

a first back reflector between said first and second end reflectors;

a plurality of light sources, wherein said plurality of light sources are oriented to output light in the same direction as said fixture; and

a lens over said plurality of light sources, wherein at least one of said end reflectors fits around said lens such that it is movable along said lens; and

wherein said second component comprises a second back reflector and wherein said second component is removably attached to said first component.

23. The fixture of claim 22, wherein said movable end reflector can slide longitudinally along said lens.

24. The fixture of claim 22, wherein said movable end reflector can rotate along said lens.

25. The fixture of claim 22, wherein light emitted from said plurality of light sources must pass through said lens to exit said fixture.

26. The fixture of claim 22, wherein said back reflector is configured to have a shape which is not planar.