Methods and apparatus for generating and modulating illumination conditions
AssigneeColor Kinetics Incorporated
InventorsAlfred D. Ducharme, Frederick M. Morgan, Ihor A. Lys, Kevin J. Dowling, George G. Mueller
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Abstract
A lighting fixture for producing a beam of light having a prescribed luminous flux spectrum. In one example, the lighting fixture comprises a plurality of groups of light-emitting devices, each such group configured to emit light having a distinct luminous flux spectrum, and a controller configurable to supply selected amounts of electrical power to the plurality of groups of light-emitting devices, such that the groups cooperate to produce a composite beam of light having a prescribed luminous flux spectrum.
Claims43
A lighting fixture for producing a beam of light having a luminous flux spectrum emulating that of a beam of light produced by a predetermined light source having an incandescent lamp, such light source being free of a filter that modifies the luminous flux spectrum of the light emitted by the lamp, the lighting fixture comprising:
- a plurality of groups of light-emitting devices, each such group configured to emit light having a distinct luminous flux spectrum;
- and
- a controller configurable to supply selected amounts of electrical power to the plurality of groups of light-emitting devices, such that the groups cooperate to produce a composite beam of light having a prescribed luminous flux spectrum that has a normalized mean deviation across the visible spectrum of less than about 30% relative to the luminous flux spectrum of a beam of light produced by the predetermined light source to be emulated.
A lighting fixture for producing a beam of colored light having a prescribed luminous flux spectrum, the lighting fixture comprising:
- a plurality of groups of light-emitting devices, each such group configured to emit light having a distinct luminous flux spectrum;
- and
- a controller configurable to supply selected amounts of electrical power to the plurality of groups of light-emitting devices, such that the groups cooperate to produce a composite beam of light;
- wherein the composite beam of light has a prescribed luminous flux spectrum having substantial energy only within a contiguous bandwidth of less than about 200 nanometers when the controller supplies prescribed maximum amounts of electrical power to all of the groups of light-emitting devices.
A lighting fixture for producing a beam of light having a prescribed luminous flux spectrum, the lighting fixture comprising:
- a plurality of groups of light-emitting devices, each such group configured to emit light having a distinct luminous flux spectrum, and at least two of the plurality of groups including different quantities of devices;
- and
- a controller configurable to supply selected amounts of electrical power to the plurality of groups of light-emitting devices, such that the groups cooperate to produce a composite beam of light having a prescribed luminous flux spectrum.
A lighting fixture for producing a beam of light having a prescribed luminous flux spectrum, the lighting fixture comprising:
- five or more groups of light-emitting devices, wherein each such group is configured to emit light having a distinct luminous flux spectrum;
- and
- a controller configurable to supply selected amounts of electrical power to the five or more groups of light-emitting devices, such that the groups cooperate to produce a composite beam of light having a prescribed luminous flux spectrum.
A lighting fixture for producing a beam of light having a prescribed luminous flux spectrum, the lighting fixture comprising:
- three or more groups of light-emitting devices, each such group configured to emit light having a distinct luminous flux spectrum with a predetermined peak flux wavelength and a predetermined spectral half-width;
- wherein the peak flux wavelength of each of the four or more groups of light-emitting devices is spaced less than about 50 nanometers from the peak flux wavelength of another of the groups of light-emitting devices;
- and
- wherein the spectral half-width of each of the four or more groups of light-emitting devices is less than about 40 nanometers;
- and
- a controller configurable to supply selected amounts of electrical power to the four or more groups of light-emitting devices, such that the groups cooperate to produce a composite beam of light having a prescribed luminous flux spectrum.
Dependencies are inferred from the claim text.