Low profile light

• US 9,726,365 B1
• Filed: 08/16/2016
• Issued: 08/08/2017
• 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: Reynolds, Raymond A., Widjaja, Addy S., Schellack, James Lynn, Maxik, Fredric S., Boomgaarden, Mark Penley, Soler, Robert R.
• Primary Examiner(s): Alavi, Ali
• Application Number:
  US15/237,804
• Time in Patent Office: 357 Days
• 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 is providing comprising a heat spreader and a heat sink thermally coupled to the heat spreader, an outer optic retained relative to at least one of the heat spreader and the heat sink, a light source in thermal communication with the heat spreader and comprising a plurality of light emitting diodes (LEDs) that are disposed on the heat spreader such that the heat spreader dissipates heat from the plurality of LEDs, and a power conditioner configured to receive AC voltage and deliver DC voltage to the plurality of LEDs, the power conditioner being disposed on a same side of the heat spreader as the plurality of LEDs. A combination defined by the heat spreader, the heat sink and the outer optic is so dimensioned to cover an opening defined by a nominally sized can light fixture and cover an opening defined by a nominally sized electrical junction box.

Claims

1. A luminaire, comprising:

a heat spreader;

a heat sink thermally coupled to the heat spreader;

an outer optic securely retained relative to at least one of the heat spreader and the heat sink;

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 on the heat spreader; and

a power conditioner configured to receive AC voltage and to deliver DC voltage to the plurality of LEDs, the power conditioner being disposed on an opposite side of the heat spreader as the plurality of LEDs;

wherein a combination defined by the heat spreader, the heat sink and the outer optic is so dimensioned so as to;

cover an opening defined by a nominally sized can light fixture, and

cover an opening defined by a nominally sized electrical junction box;

wherein the heat spreader and heat sink combine to form a base; and

wherein the base is absent heat sink fins.

2. The luminaire of claim 1 wherein 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 a ratio of H/D is equal to or less than 0.25.

3. The luminaire of claim 1 wherein the heat sink is disposed diametrically outboard of the heat spreader.

4. The luminaire of claim 1 wherein the heat sink is substantially ring-shaped and disposed around and coupled to an outer periphery of the heat spreader.

5. The luminaire of claim 4 wherein the heat spreader and the heat sink are integrally formed.