LIGHTING FIXTURE

• US 20090290343A1
• Filed: 05/21/2009
• Published: 11/26/2009
• Est. Priority Date: 05/23/2008
• Status: Abandoned Application

• Current Assignee: ABL IP Holding LLC (Acuity Brands, Inc.)
• Original Assignee: ABL IP Holding LLC (Acuity Brands, Inc.)
• Inventors: CLIFTON, DAVID, BROWN, JEFFREY ALAN, KING, LESLIE CHARLES
• Application Number:
  US12/470,021
• Publication Number:
  US 20090290343A1
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• 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 17/12 by screwing
• CPC Class Codes: F21V 17/164 the parts being subjected to bending, e.g. snap joints
• CPC Class Codes: F21V 29/677 the fans being used for discharging
• 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 29/77 with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21Y 2103/33 annular

Abstract

Embodiments of the invention provide lighting assemblies for installation in lighting fixtures. Lighting assemblies include at least one light source, at least one heat sink, and at least one reflector. Other embodiments of the lighting assembly may also include an outer surface of the reflector comprising a heat sink. In some embodiments, it may be desirable to direct light toward a wall. In those situations, a wall wash trim may be included. The lighting assemblies disclosed herein may be modular and thus replaced without having to uninstall the entire fixture. In some embodiments, a circuit board containing at least one light emitting diode in an existing lighting assembly may be replaced with another circuit board containing light emitting diodes of a different color temperature or a different color.

Claims

1. A lighting fixture comprising:

a. a lighting assembly comprising;

i. at least one heat sink;

ii. at least one reflector mounted on the heat sink; and

iii. a plurality of light sources supported on the heat sink, wherein the plurality of light sources are positioned to emit light towards the reflector; and

b. a mounting pan for supporting the lighting assembly.

2. The lighting fixture of claim 1, wherein the reflector is substantially dome-shaped.

3. The lighting fixture of claim 1, wherein the plurality of light sources comprises light emitting diodes.

4. The lighting fixture of claim 3, wherein the light emitting diodes are arranged in a circular pattern.

5. The lighting fixture of claim 3, wherein the light emitting diodes are positioned on a first side of a printed circuit board.

6. The lighting fixture of claim 5, wherein the lighting assembly further comprises a cover positioned on the first side of the printed circuit board.

7. The lighting fixture of claim 5, wherein a second side of the printed circuit board faces the heat sink.

8. The lighting fixture of claim 7, wherein the lighting assembly further comprises a thermally conductive material positioned between the second side of the printed circuit board and the heat sink.

9. The lighting fixture of claim 1, wherein an outer surface of the reflector comprises a heat sink.

10. The lighting fixture of claim 1, wherein an inner surface of the reflector has a surface reflectivity of at least 98%.

11. The lighting fixture of claim 1, wherein the lighting assembly further comprises a reflective liner positioned adjacent an inner surface of the reflector.

12. The lighting fixture of claim 1, wherein the lighting assembly further comprises an emergency test button accessible on an inner surface of the reflector.

13. The lighting fixture of claim 1, wherein the mounting pan further comprises:

a. a base portion;

b. a mounting pan aperture; and

c. a draw down.

14. The lighting fixture of claim 13, wherein the heat sink further comprises a heat sink aperture, and wherein the heat sink aperture and the mounting pan aperture align when the lighting assembly is supported by the mounting pan.

15. The lighting fixture of claim 13, further comprising at least one trim piece retained in the mounting pan draw down.

16. The lighting fixture of claim 15, wherein an inner surface of the trim piece is treated to enhance its reflectivity.

17. The lighting fixture of claim 15, further comprising an inner reflector positioned adjacent an inner surface of the trim piece, wherein a portion of the inner surface of the trim piece remains exposed when the inner reflector is positioned adjacent the inner surface of the trim piece.

18. A method of replacing an existing lighting assembly with a replacement lighting assembly through an aperture in a mounting pan located in a ceiling, the replacement lighting assembly comprising (i) at least one heat sink;

(ii) at least one reflector mounted on the heat sink; and

(iii) a plurality of light sources supported on the heat sink, wherein the plurality of light sources are positioned to emit light towards the reflector, the method comprising;

a. removing the existing lighting assembly through the mounting pan aperture;

b. disconnecting the existing lighting assembly from a power source;

C. providing the replacement lighting assembly;

d. inserting the replacement lighting assembly into the ceiling through the mounting pan aperture; and

e. connecting the replacement lighting assembly to the power source.

19. The method of claim 18, wherein providing the replacement lighting assembly comprises replacing a light source in the existing lighting assembly with the plurality of light sources of the replacement lighting assembly.

20. The method of claim 19, wherein the plurality of light sources of the replacement lighting assembly comprise light emitting diodes.