Light guide for low profile luminaire

Patent metadata

Field	Value
Publication number	US-2017139108-A1
Application number	US-201715419667-A
Country	US
Kind code	A1
Filing date	Jan 30, 2017
Priority date	Oct 5, 2009
Publication date	May 18, 2017
Grant date	—

Abstract

A luminaire comprising a heat sink, a light source and a light guide. The light source is carried by the heat sink and configured to emit a source light. The light source includes a heat spreader having an inner surface and an outer surface, and a plurality of light-emitting diodes (LEDs) carried by a circuit board and disposed generally along an outer peripheral perimeter portion of the inner surface of the heat spreader, and positioned in thermal communication with the heat spreader. The light guide includes a lens with a plurality of optical elements disposed within the lens.

First claim

That which is claimed is:

1 . A luminaire comprising:
a heat sink; a light source carried by the heat sink and configured to emit a source light, the light source comprising
a heat spreader having an inner surface and an outer surface, and
a plurality of light-emitting diodes (LEDs) carried by a circuit board and disposed generally along an outer peripheral perimeter portion of the inner surface of the heat spreader, and positioned in thermal communication with the heat spreader; and
a light guide comprising a lens including a plurality of optical elements disposed within the lens.

2 . The luminaire according to claim 1 wherein the plurality of optical elements are micro-lenses.

3 . The luminaire according to claim 2 wherein the micro-lenses are configured to scatter light in more than one direction.

4 . The luminaire according to claim 2 wherein the micro-lenses are configured to concentrate light in more than one direction.

5 . The luminaire according to claim 1 wherein the plurality of optical elements is liquid filled.

6 . The luminaire according to claim 1 wherein the plurality of optical elements is gas filled.

7 . The luminaire according to claim 1 wherein the plurality of optical elements is one of plastic and glass.

8 . The luminaire according to claim 1 wherein a combination of the light source and the heat sink is so dimensioned as to cover an opening defined by a nominally sized four-inch can light fixture, and to cover an opening defined by a nominally sized four-inch electrical junction box.

9 . A luminaire comprising:
a heat sink; a light source carried by the heat sink and configured to emit a source light, the light source comprising
a heat spreader having an inner surface and an outer surface, and
a plurality of light-emitting diodes (LEDs) carried by a circuit board and disposed generally along an outer peripheral perimeter portion of the inner surface of the heat spreader, and positioned in thermal communication with the heat spreader; and
a light guide comprising a lens including a plurality of optical elements comprising light scattering particles disposed within the lens.

10 . The luminaire according to claim 9 wherein the light scattering particles are one of glass, ceramic, rubber, silica, inorganic material, and phosphor.

11 . The luminaire according to claim 9 wherein the plurality of optical elements are one of circular, oval, rectangular, square, and polygonal in shape.

12 . The luminaire according to claim 9 wherein the plurality of optical elements are micro-lenses.

13 . The luminaire according to claim 12 wherein the micro-lenses are configured to scatter light in more than one direction.

14 . The luminaire according to claim 12 wherein the micro-lenses are configured to concentrate light in more than one direction.

15 . The luminaire according to claim 12 wherein a combination of the light source and the heat sink is so dimensioned as to cover an opening defined by a nominally sized four-inch can light fixture, and to cover an opening defined by a nominally sized four-inch electrical junction box.

16 . A luminaire comprising:
a heat sink; a light source carried by the heat sink and configured to emit a source light, the light source comprising
a heat spreader having an inner surface and an outer surface, and
a plurality of light-emitting diodes (LEDs) carried by a circuit board and disposed generally along an outer peripheral perimeter portion of the inner surface of the heat spreader, and positioned in thermal communication with the heat spreader;
a light guide comprising:
a propagation region comprising
a lens including solid optical elements comprising light scattering particles made from at least one of glass, ceramic, rubber, silica, inorganic material, and phosphor material, and non-solid optical elements comprising liquid and gas, and
wherein the lens comprises a plurality of micro-lenses; and

wherein the light guide is configured to scatter and concentrate light in multiple directions.

17 . The luminaire according to claim 16 wherein the micro-lenses are one of circular, oval, rectangular, square, and polygonal in shape.

18 . The luminaire according to claim 16 wherein a combination of the light source and the heat sink is so dimensioned as to cover an opening defined by a nominally sized four-inch can light fixture, and to cover an opening defined by a nominally sized four-inch electrical junction box.

19 . The luminaire according to claim 16 wherein a combination of the light source and the heat sink is so dimensioned as to cover an opening defined by a nominally sized four-inch can light fixture, and to cover an opening defined by a nominally sized four-inch electrical junction box.

Assignees

• Lighting Science Group Corp

Inventors

• Boomgaarden Mark Penley
• Romeu Ricardo
• Kelley Ryan
• Holland Eric

Classifications

• G02B6/0085

  Means for removing heat created by the light source from the package · CPC title

• F21S8/026

  intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling · CPC title

• G02B6/0065

  Manufacturing aspects; Material aspects · CPC title

• G02B6/0041 Primary

  provided in the bulk of the light guide · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title