Luminaires utilizing waveguides with extraction feature patterns

Patent metadata

Field	Value
Publication number	US-10859753-B2
Application number	US-201815972199-A
Country	US
Kind code	B2
Filing date	May 6, 2018
Priority date	Jan 30, 2017
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

According to an aspect of the present disclosure, a luminaire comprises a plurality of waveguides, a light source arranged to direct light into the plurality of waveguides, and a plurality of extraction feature patterns. The luminaire contemplated by the present disclosure is arranged with the plurality of waveguides are aligned such that an extraction feature pattern extracts light out of a first waveguide of the plurality of waveguides and a second extraction feature pattern extracts light out of a second waveguide of the plurality of waveguides. Further, in accordance with this aspect, the light extracted out of the first waveguide is directed through the second waveguide to develop an appearance of depth.

First claim

We claim:

1. A luminaire comprising:
a plurality of waveguides;
a light source arranged to direct light into the plurality of waveguides; and
a plurality of extraction feature patterns;
wherein the plurality of waveguides are aligned;
wherein a first extraction feature pattern extracts light out of a first waveguide of the plurality of waveguides and is disposed proximate to an interior portion of a first waveguide, and a second extraction feature pattern extracts light out of a second waveguide of the plurality of waveguides and is disposed proximate to a periphery of the second waveguide;
wherein the light extracted out of the first waveguide is directed through the second waveguide to develop an appearance of depth; and
wherein the luminaire is configured to be mounted within or against a ceiling surface, and is configured to produce emissions providing an appearance of a skylight without transmission of exterior light through any portion of the luminaire.

2. The luminaire of claim 1 wherein:
the second waveguide comprises at least one edge surface;
the light source comprises a plurality of light emitting diodes; and
some light emitting diodes of the plurality of light emitting diodes direct light into the at least one edge surface of the second waveguide.

3. The luminaire of claim 2 wherein the plurality of light emitting diodes comprises a first plurality of light emitting diodes configured to generate light emissions of a first color and a second plurality of light emitting diodes configured to generate emissions of a second color.

4. The luminaire of claim 3 wherein the first color is blue and the second color is yellow.

5. The luminaire of claim 4 wherein the first waveguide is disposed behind the second waveguide.

6. The luminaire of claim 1 further comprising a housing for mounting the luminaire within or along the ceiling surface.

7. The luminaire of claim 6 wherein the first waveguide is disposed behind the second waveguide within the housing, and the second waveguide faces a room to be illuminated.

8. The luminaire of claim 7 wherein the first and second extraction feature patterns mix light emissions of different color temperatures.

9. The luminaire of claim 1 , wherein the light source comprises a plurality of light emitting diodes.

10. The luminaire of claim 1 , wherein the first extraction feature pattern extracts light having a first color temperature out of the first waveguide, and the second extraction feature pattern extracts light having a second color temperature out of the second waveguide.

11. The luminaire of claim 1 , wherein:
the light source comprises a plurality of light emitting diodes including at least one first light emitting diode and at least one second light emitting diode;
the first waveguide comprises an interior coupling cavity spaced apart from edges of the first waveguide; and
the second waveguide comprises an edge coupling cavity arranged at an edge of a body of the second waveguide.

12. A luminaire comprising:
a waveguide body comprising first and second coupling portions, and first and second extraction feature patterns, wherein the waveguide body comprises a substantially planar light extraction surface; and
first and second light sources configured to direct light emissions into the waveguide body at the first and second coupling portions, respectively;
wherein the first coupling portion comprises an interior coupling cavity spaced apart from edges of the waveguide body, and the second coupling portion comprises an edge coupling cavity arranged at an edge of the waveguide body; and
wherein the first extraction feature pattern is disposed on a first area of the substantially planar light extraction surface, and the second extraction feature pattern is disposed on a second area of the substantially planar light extraction surface that is non-coincident with the first area.

13. The luminaire of claim 12 , wherein:
the first extraction feature pattern extracts a first spectrum of light from the first coupling portion; and
the second extraction feature pattern extracts a second spectrum of light from the second coupling portion, with the second spectrum of light differing from the first spectrum of light.

14. The luminaire of claim 13 wherein the first and second extraction feature patterns extract light comprising first and second colors, respectively.

15. The luminaire of claim 12 wherein the first and second light sources are light emitting diodes.

16. A lighting system comprising:
first and second waveguides arranged parallel to a plane, disposed adjacent to one another, and defining first and second substantially planar light-emitting surfaces, respectively; and
a plurality of light emitting diodes configured for coupling light into the first and second waveguides, the plurality of light emitting diodes comprising at least one first light emitting diode and at least one second light emitting diode; and
a patterned mask arranged between the first and second waveguides;
wherein the first and second substantially planar light emitting surfaces emit light transverse to the plane in substantially the same direction;
wherein light emitted from the first waveguide traverses the patterned mask and the second waveguide such that the light appears to have a source depth greater than a location of the first waveguide;
wherein the first waveguide comprises an interior coupling cavity spaced apart from edges of the first waveguide and configured to receive emissions from the at least one first light emitting diode; and
wherein the second waveguide comprises an edge coupling cavity arranged at an edge of a body of the second waveguide and configured to receive emissions from the at least one second light emitting diode.

17. The lighting system of claim 16 wherein the first and second waveguides operate together to produce an appearance of natural light.

18. The lighting system of claim 17 wherein the first and second waveguides operate together to produce an appearance of a skylight or a window.

19. The lighting system of claim 16 wherein the first and second waveguides operate together to produce an appearance of an optical illusion.

20. The luminaire of claim 16 , wherein the first waveguide comprises a first extraction feature pattern that extracts light out of the first waveguide, the second waveguide comprises a second extraction feature pattern that extracts light out of the second waveguide, and the second extraction feature pattern differs from the first extraction feature pattern.

21. The lighting system of claim 20 wherein the first and second waveguides operate together to produce an appearance of an optical illusion.

22. The lighting system of claim 20 wherein the first and second waveguides operate together to produce an appearance of natural light.

23. The lighting system of claim 22 wherein the first and second waveguides operate together to produce an appearance of a skylight or a window.

Assignees

• Ideal Ind Lighting Llc

Inventors

• Lowes Theodore D
• Berry Matthew

Classifications

• F21S8/04

  intended only for mounting on a ceiling or the like overhead structures (F21S8/02 takes precedence; {details of ceiling bases F21V21/03}) · CPC title

• G02B6/0076

  Stacked arrangements of multiple light guides of the same or different cross-sectional area · CPC title

• G02B6/0083

  Details of electrical connections of light sources to drivers, circuit boards, or the like · CPC title

• B44F1/02

  produced by reflected light, e.g. matt surfaces, lustrous surfaces · CPC title

• G02B6/0036

  2-D arrangement of prisms, protrusions, indentations or roughened surfaces · CPC title