Low profile light

• US 10,119,697 B2
• Filed: 08/11/2017
• Issued: 11/06/2018
• Est. Priority Date: 10/05/2009
• Status: Active Grant

• Current Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Original Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Inventors: Boomgaarden, Mark, LeClair, Richard, Jiang, Yong
• Primary Examiner(s): Alavi, Ali
• Application Number:
  US15/675,165
• Publication Number:
  US 20180010781A1
• Time in Patent Office: 452 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 21/02 Wall, ceiling, or floor bases; Fixing pendants or arms to the bases F21V21/08 takes precedence; bases for movable standing lamps F21V21/06
• CPC Class Codes: F21V 21/041 Mounting arrangements specially adapted for false ceiling panels or partition walls made of plates F21V21/047 takes precedence
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 23/026 Fastening of transformers or ballasts
• CPC Class Codes: F21V 29/508 of electrical circuits
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/87 Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A luminaire comprising a heat spreader and a heat sink disposed around and thermally communicates with the heat spreader. The heat sink forms a trim plate configured to be disposed completely external of a can light fixture or an electrical junction box. The luminaire also includes an optic securely retained relative to one of the heat spreader and the heat sink on one side of a plane defined by a lower surface of the trim plate and extends to the other side of the plane defined by the lower surface of the trim plate, as well as a light source disposed on the heat spreader and comprising a plurality of light-emitting diodes (LEDs). The plurality of LEDs are positioned entirely on one side of the plane defined by the lower surface of the trim plate. The light source is in thermal communication with the heat spreader.

Claims

1. A luminaire comprising:

a heat spreader;

a heat sink disposed around the heat spreader, the heat sink forming a trim plate configured to be disposed completely external of a can light fixture or an electrical junction box;

an optic securely retained relative to one of the heat spreader and the heat sink on one side of a plane defined by a lower surface of the trim plate and extends to the other side of the plane defined by the lower surface of the trim plate; and

a light source disposed on the heat spreader and comprising a plurality of light-emitting diodes (LEDs);

wherein the plurality of LEDs are positioned entirely on one side of the plane defined by the lower surface of the trim plate;

wherein the light source is in thermal communication with the heat spreader; and

wherein the heat spreader is in thermal communication with the heat sink.

2. The luminaire of claim 1 wherein the heat spreader and the heat sink are integrally formed.

3. The luminaire of claim 2 wherein the integrally formed heat spreader and heat sink form a base, the base having a back surface with radially oriented recesses therein.

4. The luminaire of claim 1 wherein the heat spreader, heat sink, and optic, in combination, have an overall height H and an overall outside dimension D such that the ratio of H/D is equal to or less than 0.25.

5. The luminaire of claim 1 wherein a back surface of the heat spreader is substantially planar with a back surface of the heat sink.

6. The luminaire of claim 1 further comprising an inner optic disposed over the plurality of LEDs.

7. The luminaire of claim 6 wherein the inner optic is positioned entirely on the same side of the plane defined by the lower surface of the trim plate as the plurality of LEDs.

8. The luminaire of claim 1 further comprising a reflector.

9. The luminaire of claim 8 wherein the reflector is positioned entirely on the same side of the plane defined by the lower surface of the trim plate as the plurality of LEDs.

10. The luminaire of claim 1 further comprising a power conditioner.

11. The luminaire of claim 10 wherein the power conditioner is positioned entirely on the same side of the plane defined by the lower surface of the trim plate as the plurality of LEDs.

12. The luminaire of claim 10 wherein the power conditioner is disposed on a same side of the heat spreader as the plurality of LEDs.

13. The luminaire of claim 10 wherein the power conditioner is disposed on an opposite side of the heat spreader as the plurality of LEDs.

14. The luminaire according to claim 10 wherein the power conditioner is dimensioned so as to fit within a nominally sized can light fixture and a nominally sized electrical junction box.

15. The luminaire of claim 1 wherein the heat sink is ring-shaped.

20. The luminaire of claim 1 further comprising a reflector positioned entirely on the same side of the plane defined by the lower surface of the trim plate as the plurality of LEDs.

16. A luminaire comprising:

a heat spreader;

a heat sink disposed around the heat spreader, the heat sink forming a trim plate configured to be disposed completely external of a can light fixture or an electrical junction box;

an optic securely retained relative to one of the heat spreader and the heat sink on one side of a plane defined by a lower surface of the trim plate and extends to the other side of the plane defined by the lower surface of the trim plate;

a light source disposed on the heat spreader and comprising a plurality of light-emitting diodes (LEDs); and

a power conditioner;

wherein the plurality of LEDs are positioned entirely on one side of the plane defined by the lower surface of the trim plate;

wherein the light source is in thermal communication with the heat spreader;

wherein the heat spreader is in thermal communication with the heat sink;

wherein the heat spreader, heat sink, and optic, in combination, have an overall height H and an overall outside dimension D such that the ratio of H/D is equal to or less than 0.25.

17. The luminaire of claim 16 wherein the power conditioner is positioned entirely on the same side of the plane defined by the lower surface of the trim plate as the plurality of LEDs.

18. The luminaire of claim 16 wherein the power conditioner is disposed on a same side of the heat spreader as the plurality of LEDs.

19. The luminaire of claim 16 further comprising an inner optic disposed over the plurality of LEDs and positioned entirely on the same side of the plane defined by the lower surface of the trim plate as the plurality of LEDs.