LED light fixtures with waveguide edge
An optic for a light-emitting diode (LED) array comprises an arrangement of optical structures for providing down lighting distribution from the LED array and a waveguide edge for providing up-lighting distribution from the LED array. Luminaires are described comprising an LED array and the optic. An overhead light fixture includes a driver assembly and a light-emitting assembly. The light-emitting assembly is operably connected to the driver and configured for downward emission of light from a light source of the light-emitting assembly. The light fixture is configured to be mounted to a canopy sheet of an overhead canopy, with the driver assembly disposed above the canopy sheet and the light-emitting assembly disposed below the canopy sheet. A bezel is optionally disposed around a lens of the light-emitting assembly, for aesthetic reasons and/or for controlling a degree of lateral emission of light from the light fixture.
1. A light fixture, comprising:
a housing; and
a light-emitting assembly disposed in the housing and comprising:
a light source comprising an array of light-emitting diodes (LEDs) comprising a first region and a second region that are separately controlled, wherein the first region is a middle region providing a main portion of area lighting from the light fixture and the second region is a perimetrical region providing effect lighting;
a lens configured to direct a first portion of light from the light source downward from the housing, the first region corresponding to the first portion of light; and
a waveguide edge configured to direct a second portion of light from the light source through a side of the housing, the second region corresponding to the second portion of light.
2. The light fixture of claim 1 , wherein the lens provides one or more down-lighting distributions from the light fixture.
3. The light fixture of claim 2 , wherein the one or more down-lighting distributions comprise a symmetric distribution and an asymmetric distribution.
4. The light fixture of claim 2 , wherein the waveguide edge provides one or more up-lighting distributions from the light fixture.
5. The light fixture of claim 4 , wherein the one or more up-lighting distributions comprise a symmetric distribution about sides of the housing and an asymmetric distribution about at least one side of the housing.
6. The light fixture of claim 4 , wherein the one or more up-lighting distributions are at angles of 60° or more relative to an axial direction of the one or more down-lighting distributions.
7. The light fixture of claim 4 , wherein the one or more up-lighting distributions have an angle between 5° and 30° from a plane normal to nadir.
8. The light fixture of claim 4 , wherein the one or more up-lighting distributions have an angle between 15° and 20° from a plane normal to nadir.
9. The light fixture of claim 1 , wherein the second region comprises at least one row of LEDs configured to emit light into the waveguide edge.
10. The light fixture of claim 9 , wherein the waveguide edge redirects the light emitted from the at least one row of LEDs to exit a side face of the light fixture.
11. The light fixture of claim 1 , further comprising a bezel disposed peripherally about the light-emitting assembly.
12. The light fixture of claim 11 , wherein the bezel is at least partially opaque and further shapes the second portion of light.
13. The light fixture of claim 11 , wherein the bezel is a diffusing bezel providing a visual effect for the second portion of light.
14. The light fixture of claim 1 , wherein the waveguide edge extends radially outward relative to the lens.
15. The light fixture of claim 1 , wherein the lens defines optical structures to direct the first portion of light.
16. The light fixture of claim 15 , wherein the optical structures are arranged in concentric radial rings.
17. The light fixture of claim 15 , wherein the optical structures are micro-scale optical structures.
18. A light fixture, comprising:
a housing;
a light-emitting assembly disposed in the housing and comprising:
a light source comprising an array of light-emitting diodes (LEDs);
a lens configured to direct a first portion of light from the light source downward from the housing; and
a waveguide edge configured to direct a second portion of light from the light source through a side of the housing; and
a bezel disposed peripherally about the light-emitting assembly, wherein the bezel is at least partially opaque and further shapes the second portion of light.
19. A light fixture, comprising:
a housing;
a light-emitting assembly disposed in the housing and comprising:
a light source comprising an array of light-emitting diodes (LEDs);
a lens configured to direct a first portion of light from the light source downward from the housing; and
a waveguide edge configured to direct a second portion of light from the light source through a side of the housing; and
a bezel disposed peripherally about the light-emitting assembly, wherein the bezel is a diffusing bezel providing a visual effect for the second portion of light.
20. A light fixture, comprising:
a housing; and
a light-emitting assembly disposed in the housing and comprising:
a light source comprising an array of light-emitting diodes (LEDs);
a lens configured to direct a first portion of light from the light source downward from the housing, the lens defining optical structures arranged in concentric rings to direct the first portion of light; and
a waveguide edge configured to direct a second portion of light from the light source through a side of the housing.
21. A light fixture, comprising:
a housing; and
a light-emitting assembly disposed in the housing and comprising:
a light source comprising an array of light-emitting diodes (LEDs);
a lens configured to direct a first portion of light from the light source downward from the housing, the lens defining micro-scale optical structures arranged to direct the first portion of light; and
a waveguide edge configured to direct a second portion of light from the light source through a side of the housing.