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US 2015/0049511 A1Published application
Waveguide Having Unidirectional Illuminance
AssigneeCree, Inc.
InventorsEric J. Tarsa, David R. Stone, Jean-Claude David Ramey de Sugny
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Abstract
A luminaire includes an optical waveguide having a first surface and a second surface opposite the first surface, and a light source associated with the optical waveguide. At least about 80% of light produced by the light source is directed by the waveguide into an illumination distribution emitted from the first surface of the optical waveguide.
Claims32
A luminaire, comprising:
- an optical waveguide having a first surface and a second surface opposite the first surface;
- a light source associated with the optical waveguide;
- wherein at least about 80% of light produced by the light source is directed by the waveguide into an illumination distribution emitted from the first surface of the optical waveguide.
A luminaire, comprising:
- a waveguide having a first surface and a second surface opposite the first surface, wherein the waveguide includes an extraction feature disposed on the first surface;
- and
- a light source associated with the waveguide;
- wherein light emitted from the light source is directed by the waveguide into an illumination distribution emitted from the first surface of the waveguide;
- and
- wherein the waveguide is optically transparent such that the illumination distribution is visible along a line of sight through the waveguide extending from the second surface to the first surface.
3 more elements
A luminaire, comprising:
- a housing;
- an LED element disposed within the housing;
- a waveguide having a light emitting surface disposed in the housing adjacent the LED element;
- and
- an extraction feature disposed on the light emitting surface of the waveguide;
- wherein the extraction feature has a curved shape extending between an aperture adjacent the light emitting surface and a base opposite the aperture.
3 more elements
Dependencies are inferred from the claim text.