Light Emitting Diode Troffer

• US 20120002411A1
• Filed: 09/14/2011
• Published: 01/05/2012
• Est. Priority Date: 01/21/2009
• Status: Abandoned Application

• Current Assignee: Cooper Technologies Company (Eaton Corporation PLC.)
• Original Assignee: Cooper Technologies Company (Eaton Corporation PLC.)
• Inventors: Ladewig, Christopher
• Application Number:
  US13/232,169
• Publication Number:
  US 20120002411A1
• Time in Patent Office: Days
• US Class Current: 362/225
• CPC Class Codes: F21S 8/02 of recess-mounted type, e.g. downlighters specially adapted for vehicle exteriors F21S41/00-F21S45/00
• CPC Class Codes: F21V 21/008 Suspending from a cable or suspension line
• CPC Class Codes: F21V 7/0008 providing for indirect lighting
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A troffer-style luminaire includes first and second side ends and a top end extending between the side ends. The side and top ends define an interior region. Light emitting diodes (“LEDs”) are coupled along interior surfaces of the side ends, within the interior region. At least some of the LEDs are coupled to the interior surfaces by being wedged between members protruding into the interior region from the interior or other surfaces. In addition, or in the alternative, one or more spring clips can apply a force that holds the LEDs against the interior surfaces. A reflector extends between the LEDs and the top member and reflects light from the LEDs towards a bottom end of the frame. The light emitted by the LEDs is directed to the reflector and then indirectly emitted through the bottom end, into a desired environment.

Claims

1. A light fixture, comprising:

a housing comprising;

a first side member;

a second side member; and

an interior region disposed substantially between the first side member and the second side member;

a first plurality of light emitting diodes (LEDs) coupled along an interior surface of the first side member, within the interior region; and

a reflector extending substantially between the first plurality of LEDs and a top end of the housing and reflecting light generated by the first plurality of LEDs towards a bottom end of the housing,

wherein substantially all of the light emitted from the first plurality of LEDs is reflected by the reflector before exiting the fixture along the bottom end.

2. The light fixture of claim 1, further comprising:

a second plurality of LEDs coupled along an interior surface of the second side member, within the interior region,

wherein the reflector extends substantially between the top end of the housing and the first and second pluralities of LEDs, and

wherein substantially all of the light emitted from the first and second pluralities of LEDs is reflected by the reflector before exiting the fixture along the bottom end.

3. The light fixture of claim 1, further comprising:

a first elongated member extending angularly from the interior surface of the first side member, into the interior region; and

a second elongated member extending angularly from the interior surface of the second side member, into the interior region, each elongated member engaging and at least partially supporting an end of the reflector.

4. The light fixture of claim 1, wherein the reflector comprises two substantially arc-shaped segments.

5. The light fixture of claim 1, wherein the first side member comprises at least one elongated member extending angularly away from the interior region, each elongated member dispersing heat from the first plurality of LEDs.

6. The light fixture of claim 1, wherein the first side member comprises a plurality of elongated members extending angularly away from the interior region, each elongated member extending substantially along a longitudinal axis of the first side member, at least one gap extending between neighboring ones of the elongated members, each gap extending substantially along the longitudinal axis of the first side member.

7. The light fixture of claim 1, further comprising:

a substrate coupled to at least one of the first plurality of LEDs;

an elongated member extending from the interior surface of the first side member, into the interior region; and

a clip releasably coupled to at least a portion of the elongated member, wherein an end of the clip engages an end of the substrate.

8. The light fixture of claim 7, further comprising at least one angled member extending into the interior region and engaging a second end of the substrate, the substrate being substantially wedged between the elongated member and the angled member.

9. The light fixture of claim 1, further comprising a cover extending at least partially along the bottom end of the housing, between the first side member and the second side member.

10. The light fixture of claim 9, wherein the cover comprises a lens.

11. The light fixture of claim 1, wherein the first plurality of LEDs comprise at least one white LED and at least one non-white LED.

12. The light fixture of claim 1, further comprising a bottom member extending from the first side member, along the bottom end,

wherein the first plurality of LEDs are not visible to a person positioned directly below the bottom member.

13. A light fixture, comprising:

a substrate having a first side and a second side;

at least one light emitting diode (LED) coupled to the first side;

a surface;

an elongated member extending angularly from the surface; and

a spring clip disposed around at least a portion of the elongated member,

wherein the spring clip applies a force against the first side of the substrate, thereby pressing at least a portion of the second side against the surface.

14. The light fixture of claim 13, wherein the elongated member extends substantially perpendicularly from the surface.

15. The light fixture of claim 13, wherein an end of the spring clip applies a force to an end of the substrate.

16. The light fixture of claim 15, further comprising at least one member engaging a second end of the substrate, the substrate being substantially wedged between the member and the elongated member.

17. The light fixture of claim 13, further comprising:

a second elongated member extending angularly from the surface; and

a reflector resting on the second elongated member, the reflector receiving substantially all of the light emitted by the LEDs and reflecting the received light towards a bottom end of the light fixture.

18. The light fixture of claim 17, wherein the second elongated member is disposed substantially between the elongated member and a top end of the light fixture.

19. The light fixture of claim 18, wherein the reflector extends substantially between the second elongated member and the top end.

20. A light fixture, comprising:

a housing comprising;

a top end;

a bottom member defining at least a portion of a bottom end of the housing; and

a side member extending between the top end and the bottom member, wherein the bottom member and side member define at least a portion of an interior region of the housing;

a plurality of light emitting diodes (LEDs) coupled along an interior surface of the side member, within the interior region;

an elongated member extending angularly from the interior surface, the elongated member being disposed substantially between the LEDs and the top end of the housing; and

a reflector coupled to the elongated member and comprising a reflective material that reflects light from the LEDs towards the bottom member.