Luminaire with selectable luminous intensity pattern
First Claim
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1. A luminaire, comprising:
- a first waveguide having a first region with a first light extraction feature that emits a first luminous intensity pattern and a second region with a second light extraction feature that emits a second luminous intensity pattern different from the first luminous intensity pattern, the first light extraction feature being different from the second light extraction feature;
a second waveguide having a third region with a third light extraction feature that emits a third luminous intensity pattern and a fourth region with a fourth light extraction feature that emits a fourth luminous intensity pattern different from the third luminous intensity pattern, the third light extraction feature being different from the fourth light extraction feature, and a combination of the first light extraction feature and the second light extraction feature being different than a combination of the third light extraction feature and the fourth light extraction feature;
a plurality of LED elements comprising a first LED element and a second LED element for emitting light to the first waveguide and a third LED element and a fourth LED element for emitting light to the second waveguide; and
circuitry to control at least one parameter of electrical power delivered to at least one of the first LED element, the second LED element, the third LED element and the fourth LED element to cause the luminaire to produce a selected one of a plurality of luminous intensity patterns, the first waveguide and the second waveguide being supported in a mounting apparatus to provide a light fixture where the light emitted from the first waveguide and the second waveguide is controllable to obtain a commanded illumination pattern.
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Abstract
A luminaire comprises at least one waveguide having a first region that emits a first luminous intensity pattern and a second region that emits a second luminous intensity pattern different from the first luminous intensity pattern. The luminaire further includes a plurality of LED elements and circuitry to control the plurality of LED elements to cause the luminaire to produce a selected one of a plurality of luminous intensity patterns.
701 Citations
39 Claims
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1. A luminaire, comprising:
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a first waveguide having a first region with a first light extraction feature that emits a first luminous intensity pattern and a second region with a second light extraction feature that emits a second luminous intensity pattern different from the first luminous intensity pattern, the first light extraction feature being different from the second light extraction feature; a second waveguide having a third region with a third light extraction feature that emits a third luminous intensity pattern and a fourth region with a fourth light extraction feature that emits a fourth luminous intensity pattern different from the third luminous intensity pattern, the third light extraction feature being different from the fourth light extraction feature, and a combination of the first light extraction feature and the second light extraction feature being different than a combination of the third light extraction feature and the fourth light extraction feature; a plurality of LED elements comprising a first LED element and a second LED element for emitting light to the first waveguide and a third LED element and a fourth LED element for emitting light to the second waveguide; and circuitry to control at least one parameter of electrical power delivered to at least one of the first LED element, the second LED element, the third LED element and the fourth LED element to cause the luminaire to produce a selected one of a plurality of luminous intensity patterns, the first waveguide and the second waveguide being supported in a mounting apparatus to provide a light fixture where the light emitted from the first waveguide and the second waveguide is controllable to obtain a commanded illumination pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A luminaire, comprising:
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a plurality of waveguides each having a light emission surface including a plurality of extraction features; the plurality of extraction features on at least one of the light emission surfaces having a first light extraction characteristic and the plurality of extraction features on at least another one of the light emission surfaces having a second light extraction characteristic where the plurality of extraction features on the at least one of the light emission surfaces is different than the light extraction characteristic of the plurality of extraction features on the at least another one of the light emission surfaces such that the luminous intensity pattern emitted by the at least one of the light emission surfaces is different than the luminous intensity pattern emitted by the at least another one of the light emission surfaces regardless of the spatial orientation of the plurality of waveguides; a plurality of LED elements associated with the plurality of waveguides; and circuitry controlling at least one parameter of electrical power delivered to at least some of the LED elements of the plurality of LED elements to cause the luminaire to produce a selected one of a plurality of luminous intensity patterns, the plurality of waveguides being supported in a mounting apparatus to provide a light fixture where the light emitted from the plurality of waveguides is controllable to obtain the selected one of a plurality of luminous intensity patterns wherein the selected one of a plurality of luminous intensity patterns includes at least one of a wall-wash luminous intensity pattern, a near-lambertian luminous intensity pattern, and a spot-light luminous intensity pattern. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A luminaire, comprising:
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multiple waveguides each having at least two light emission surfaces and a light coupling feature, wherein the waveguides have substantially identical shapes; a mounting apparatus that maintains the multiple waveguides in a side-by-side array wherein each waveguide is disposed adjacent at least one other waveguide;
an optical isolation member disposed between adjacent waveguides;extraction features disposed on each light emission surface of the waveguides, the extraction features comprising protrusions and disposed on an associated light emission surface, wherein the protrusions associated with one of the light emission surfaces has a first light extraction characteristic and the protrusions associated with another of the light emission surfaces has a second light extraction characteristic different than the first light extraction characteristic; LED elements optically coupled to an optical coupling feature of each waveguide; and circuitry adapted to apply electrical power to at least some of the LED elements to cause the luminaire to produce a selected one of a number of luminous intensity patterns. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A luminaire, comprising:
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a plurality of waveguides each having a light emission surface; a plurality of extraction features disposed on the light emission surfaces of the waveguides, wherein the extraction features on at least one of the light emission surfaces have a different light extraction characteristic than the extraction features on at least another of the light emission surfaces, wherein the plurality of extraction features is carried by multiple substrates each disposed on an associated one of the emission surfaces and wherein the plurality of waveguides includes a first plurality of waveguides, a second plurality of waveguides and a third plurality of waveguides wherein each of the first plurality of waveguides includes extraction features comprising protrusions having a first shape, each of the second plurality of waveguides includes extraction features comprising protrusions of a second shape different than the first shape, and each of the third plurality of waveguides includes extraction features comprising protrusions of a third shape different than the first and second shapes; a plurality of LED elements associated with the plurality of waveguides; and circuitry controlling at least one parameter of electrical power delivered to at least some of the LED elements of the plurality of LED elements to cause the luminaire to produce a selected one of a plurality of luminous intensity patterns, the plurality of waveguides being supported in a mounting apparatus to provide a light fixture where the light emitted from the plurality of waveguides is controllable to obtain the selected one of a plurality of luminous intensity patterns wherein the selected one of a plurality of luminous intensity patterns includes at least one of a wall-wash luminous intensity pattern, a near-lambertian luminous intensity pattern, and a spot-light luminous intensity pattern.
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Specification