# US 10,119,697 B2 · Low profile light

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- Number: US 10,119,697 B2
- Document ID: US10119697B2
- Status: Granted
- Kind: B2
- Application number: 15/675,165
- Filed: 2017-08-11
- Published: 2018-01-11
- Granted: 2018-11-06
- Earliest claimed: 2009-10-05
- Assignees: Lighting Science Group Corporation
- Applicants: Lighting Science Group Corporation
- Inventors: Mark Boomgaarden; Richard LeClair; Yong Jiang
- Web page: https://patentgrep.com/patent/US10119697B2

## CPC

- F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21S 8/026: {intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling}
- F21V 21/041: {Mounting arrangements specially adapted for false ceiling panels or partition walls made of plates (F21V21/047 takes precedence)}
- F21V 29/508: of electrical circuits
- F21V 29/87: Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
- 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)
- F21V 23/006: {the substrate being distinct from the light source holder}
- F21V 23/026: {Fastening of transformers or ballasts}
- F21V 31/005: {Sealing arrangements therefor}
- F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements
- F21Y 2115/10: Light-emitting diodes [LED]
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## 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

### Claim 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 2)

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.

### Claim 4 (depends on 1)

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.

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 6)

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.

### Claim 8 (depends on 1)

The luminaire of claim 1 further comprising a reflector.

### Claim 9 (depends on 8)

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.

### Claim 10 (depends on 1)

The luminaire of claim 1 further comprising a power conditioner.

### Claim 11 (depends on 10)

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.

### Claim 12 (depends on 10)

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

### Claim 13 (depends on 10)

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

### Claim 14 (depends on 10)

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.

### Claim 15 (depends on 1)

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

### Claim 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.

### Claim 17 (depends on 16)

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.

### Claim 18 (depends on 16)

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

### Claim 19 (depends on 16)

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.

### Claim 20 (depends on 1)

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.