SOLID-STATE AREA ILLUMINATION SYSTEM
First Claim
1. A solid-state area illumination system, comprising:
- a. a plurality of LED devices, each LED device formed on a separate substrate and each LED device emitting differently colored light at different angles relative to the substrate;
wherein each color of light has a frequency distribution including a peak and full width half maximum and wherein the peak frequencies of each color of light differ by at least the smallest of the full width half maximums of the frequency distributions of emitted light;
b. a support for positioning each of the plurality of LED devices at a plurality of orientations relative to an area of illumination upon a surface, so that any point within the area of illumination will receive multiple colors of light from more than one of the LED devices at different angles;
wherein each LED device comprises one or more light-emitting elements, each light-emitting element including multiple sizes of core/shell quantum-dot emitters formed in a common polycrystalline semiconductor matrix, each different size of quantum-dot emitter in each light-emitting element having a peak emission frequency and emission bandwidth, each light-emitting element further including a succession of layers comprising a plurality of optical microcavities formed at the different angles, wherein an emission bandwidth of each population of quantum-dot emitters in each light-emitting element is tuned to a frequency response of one of the plurality of optical microcavities of that light-emitting element.
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Accused Products
Abstract
A solid-state area illumination system includes multiple LED devices, each LED device is formed on a separate substrate and each LED device emits differently colored light at different angles relative to the substrate. The peak frequencies of each color of light differ by at least the smallest of the full width half maximums of the frequency distributions of emitted light. Also included is a support for positioning each of the LED devices at multiple orientations relative to an area of illumination upon a surface, so that any point within the area of illumination will receive multiple colors of light from more than one of the LED devices at different angles. Each LED device includes one or more light-emitting elements, each light-emitting element having multiple sizes of core/shell quantum-dot emitters formed in a common polycrystalline semiconductor matrix.
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Citations
16 Claims
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1. A solid-state area illumination system, comprising:
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a. a plurality of LED devices, each LED device formed on a separate substrate and each LED device emitting differently colored light at different angles relative to the substrate;
wherein each color of light has a frequency distribution including a peak and full width half maximum and wherein the peak frequencies of each color of light differ by at least the smallest of the full width half maximums of the frequency distributions of emitted light;b. a support for positioning each of the plurality of LED devices at a plurality of orientations relative to an area of illumination upon a surface, so that any point within the area of illumination will receive multiple colors of light from more than one of the LED devices at different angles; wherein each LED device comprises one or more light-emitting elements, each light-emitting element including multiple sizes of core/shell quantum-dot emitters formed in a common polycrystalline semiconductor matrix, each different size of quantum-dot emitter in each light-emitting element having a peak emission frequency and emission bandwidth, each light-emitting element further including a succession of layers comprising a plurality of optical microcavities formed at the different angles, wherein an emission bandwidth of each population of quantum-dot emitters in each light-emitting element is tuned to a frequency response of one of the plurality of optical microcavities of that light-emitting element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of forming a solid-state area illumination system, comprising the steps of:
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a. forming multiple sizes of core/shell quantum-dot emitters in a common polycrystalline semiconductor matrix, each different size of quantum-dot emitter having a peak emission frequency and emission bandwidth; b. forming a plurality of light-emitting elements, each light-emitting element including a succession of layers comprising an optical microcavity, each optical microcavity including an emissive layer containing a population of quantum-dot emitters of one or more sizes, wherein an emission bandwidth of each population of quantum-dot emitters in each light-emitting element is tuned to a frequency response of the optical microcavity of that light-emitting element; c. forming a plurality of LED devices, each LED device comprising one or more light-emitting elements, each device on a separate substrate and each device emitting light at a plurality of angles relative to the substrate, the emitted light have different colored light at different angles; and d. providing a support positioning each of the plurality of LED devices at a plurality of orientations relative to an area of illumination, said positioning being defined so that any point on any surface within the area of illumination will receive multiple colors of light from more than one of the LED devices.
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Specification