Low profile light and accessory kit for the same

• US 8,967,844 B2
• Filed: 12/19/2013
• Issued: 03/03/2015
• 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 Penley, Balestracci, Michael, LeClair, Rick, Sun, Wei, Henderson, David, Sullivan, Shane
• Primary Examiner(s): Alavi, Ali
• Application Number:
  US14/134,884
• Publication Number:
  US 20140104847A1
• Time in Patent Office: 439 Days
• Field of Search: 362/362, 362/364, 362/365, 362/368, 362/373, 362/294, 362/249.01, 362/249.02
• US Class Current: 362/547
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21K 9/235 Details of bases or caps, i.e. the parts that connect the light source to a fitting; Arrangement of components within bases or caps F21K9/238 takes precedence
• CPC Class Codes: F21K 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21K 9/62 using mixing chambers, e.g. housings with reflective walls
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21K 9/69 Details of refractors forming part of the light source
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21S 8/033 the surface being a wall or like vertical structure, e.g. building facade
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21V 17/007 with provision for shipment or storage
• 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 21/04 Recessed bases
• CPC Class Codes: F21V 21/047 Mounting arrangements with fastening means engaging the inner surface of a hole in a ceiling or wall, e.g. for solid walls or for blind holes
• CPC Class Codes: F21V 23/00 Arrangement of electric circuit elements in or on lighting devices characterised by cooling arrangements F21V29/508
• CPC Class Codes: F21V 23/002 Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
• 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 23/026 Fastening of transformers or ballasts
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21V 29/503 of light sources cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H01L33/64
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/71 : using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
• CPC Class Codes: F21V 29/713 : in direct thermal and mechanical contact of each other to form a single system
• CPC Class Codes: F21V 29/773 : the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/777 : the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21V 7/0066 : specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified F21V7/16 - F21V7/30 take precedence
• CPC Class Codes: F21V 7/04 : Optical design
• CPC Class Codes: F21Y 2101/00 : Point-like light sources
• 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 includes a heat spreader, a heat sink, a light source and an outer optic. The heat sink is substantially ring-shaped and is disposed around and in thermal communication with an outer periphery of the heat spreader. The light source is disposed in thermal communication with the heat spreader, the light source having a plurality of light emitting diodes (LEDs) that are disposed in thermal communication with the heat spreader. The outer optic is disposed in optical communication with the plurality of LEDs. The heat spreader, the heat sink and the outer optic, in combination, have an overall height H and an overall outside dimension D such that the ratio of H/D is so dimensioned as to: cover an opening defined by a nominally sized four-inch can light fixture; and, cover an opening defined by a nominally sized four-inch electrical junction box.

Claims

1. A luminaire, comprising:

a heat spreader and a heat sink, the heat sink being substantially ring-shaped and being disposed around and in thermal communication with an outer periphery of the heat spreader;

a light source disposed in thermal communication with the heat spreader, the light source comprising a plurality of light emitting diodes (LEDs) that are disposed in thermal communication with the heat spreader such that the heat spreader facilitates transfer of heat from the LEDs to the heat sink;

an outer optic disposed in optical communication with the plurality of LEDs; and

a power conditioner disposed and configured to receive AC voltage from an electrical supply and to provide DC voltage for the plurality of LEDs;

wherein the power conditioner is disposed, configured and sized to fit at least partially within an interior space of;

a nominally sized can light fixture; and

, a nominally sized electrical junction box.

2. The luminaire of claim 1, wherein:

the heat spreader, the heat sink and the outer optic, in combination, have an overall outside dimension D so dimensioned as to;

cover an opening defined by a nominally sized four-inch can light fixture; and

, cover an opening defined by a nominally sized four-inch electrical junction box.

3. The luminaire of claim 2, wherein:

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

4. The luminaire of claim 3, wherein:

the overall height H is equal to or less than 1.5 inches.

5. The luminaire of claim 3, wherein:

the overall outside dimension D is equal to or greater than 7 inches.

6. The luminaire of claim 1, wherein:

the heat spreader comprises a first plurality of threads, and the heat sink comprises a second plurality of threads that are interconnected with the first plurality of threads.

7. The luminaire of claim 1, wherein:

the heat spreader and the heat sink are integrally formed such that a heat flow path through the heat spreader to the heat sink is continuous an uninterrupted.

8. The luminaire of claim 1, wherein:

the LEDs are disposed on one side of the heat spreader and the power conditioner is disposed on another opposing side of the heat spreader.

9. The luminaire of claim 1, wherein:

the power conditioner is configured and sized to fit completely within an interior space of a nominally sized can light fixture; and

, a nominally sized electrical junction box.

10. The luminaire of claim 1, further comprising:

an inner optic disposed over the plurality of LEDs between the plurality of LEDs and the outer optic.

11. The luminaire of claim 1, further comprising:

a reflector fixedly disposed in optical communication with the plurality of LEDs to reflect incident light from the plurality of LEDs to the outer optic.

12. The luminaire of claim 1, wherein:

the heat sink forms a trim plate that is disposed completely external of the can light fixture or the electrical junction box.

13. The luminaire of claim 1, wherein:

the plurality of LEDs is in the form of an LED chip package.

14. The luminaire of claim 1, wherein:

the heat sink is disposed in direct thermal communication with the heat spreader.

15. The luminaire of claim 13, wherein:

the LED chip package is disposed in direct thermal communication with the heat spreader.

16. The luminaire of claim 1, wherein:

the outer optic is securely retained relative to at least one of the heat spreader and the heat sink.

17. The luminaire of claim 1, further comprising:

an electrical supply line having a first end electrically connected to the power conditioner, and a second end electrically connected to a plug-in connector; and

an accessory kit, comprising;

at least one of;

a first pre-wired jumper comprising a pair of insulated electrical wires having a first plug-in connector electrically connected at one end and an Edison base electrically connected at the other opposing end; and

, a second pre-wired jumper comprising a pair of insulated electrical wires having a second plug-in connector electrically connected at one end and cut wire ends at the other opposing end;

wherein the plug-in connector of the first pre-wired jumper and the second pre-wired jumper are each configured to electrically engage with the plug-in connector of the electrical supply line.

18. The luminaire of claim 17, wherein:

the accessory kit comprises both the first pre-wired jumper and the second pre-wired jumper.

19. The luminaire of claim 17, wherein the accessory kit further comprises:

at least one twist-on wire connector.

20. The luminaire of claim 1, wherein:

the heat spreader comprises mounting holes suitably spaced apart to receive mounting fasteners to secure the heat spreader to an electrical junction box.

21. The luminaire of claim 1, wherein:

the nominally sized can light fixture is a nominally sized four-inch can light fixture, and the nominally sized electrical junction box is a nominally sized four-inch electrical junction box.

22. The luminaire of claim 1, wherein:

the heat sink is disposed diametrically outboard of the heat spreader.

23. The luminaire of claim 1, wherein:

the heat sink also serves as a trim plate;

the combination of the trim plate and the outer optic have an overall height H;

the trim plate has an overall diameter D; and

the ratio of H/D is equal to or less than 0.25.

24. A luminaire, comprising:

a heat spreader and a heat sink, the heat sink being substantially ring-shaped and being disposed around and in thermal communication with an outer periphery of the heat spreader;

a light source disposed in thermal communication with the heat spreader, the light source comprising a plurality of light emitting diodes (LEDs) that are disposed in thermal communication with the heat spreader such that the heat spreader facilitates transfer of heat from the LEDs to the heat sink;

an outer optic disposed in optical communication with the plurality of LEDs;

a power conditioner disposed and configured to receive AC voltage from an electrical supply and to provide DC voltage for the plurality of LEDs;

wherein the power conditioner is disposed, configured and sized to fit at least partially within an interior space of;

a nominally sized can light fixture; and

, a nominally sized electrical junction box;

wherein the heat spreader, the heat sink and the outer optic, in combination, have an overall outside dimension D so dimensioned as to;

cover an opening defined by a nominally sized four-inch can light fixture; and

, cover an opening defined by a nominally sized four-inch electrical junction box; and

wherein the heat sink forms a trim plate that is disposed completely external of the can light fixture or the electrical junction box.