Methods and apparatus for an LED light engine
First Claim
1. A light engine comprising:
- a high thermal conductivity substrate;
a plurality of light-emitting-diode (LED) devices mechanically connected to said substrate, said LED devices electrically interconnected in a circuit having first and second terminals, said first and second terminals configured to accept an input voltage;
an outer dike fixed to said substrate and surrounding at least a portion of said LED devices;
a substantially transparent polymeric encapsulant disposed on said plurality of LED devices and restrained by said outer dike; and
an inner dike positioned substantially in the center of said substrate.
1 Assignment
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Accused Products
Abstract
An LED light engine having a high thermal conductivity substrate (e.g., a metal-clad PCB), a plurality of light-emitting-diode (LED) semiconductor devices mechanically connected to the substrate, an outer dike fixed to the substrate and surrounding at least a portion of the LED devices, and a substantially transparent polymeric encapsulant (e.g., optical-grade silicone) disposed on the plurality of LED devices and restrained by said outer dike. In one embodiment, the light engine includes a reflector (e.g., a generally conic reflector) fixed to the substrate to form the outer dike. In another embodiment, an optical component (e.g., a lens, filter, or the like) is optically coupled to the polymeric encapsulant disposed on the LED devices.
142 Citations
6 Claims
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1. A light engine comprising:
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a high thermal conductivity substrate;
a plurality of light-emitting-diode (LED) devices mechanically connected to said substrate, said LED devices electrically interconnected in a circuit having first and second terminals, said first and second terminals configured to accept an input voltage;
an outer dike fixed to said substrate and surrounding at least a portion of said LED devices;
a substantially transparent polymeric encapsulant disposed on said plurality of LED devices and restrained by said outer dike; and
an inner dike positioned substantially in the center of said substrate.
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2. A light engine comprising:
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a high thermal conductivity substrate;
a plurality of light-emitting-diode (LED) devices mechanically connected to said substrate, said LED devices electrically interconnected in a circuit having first and second terminals, said first and second terminals configured to accept an input voltage;
an outer dike fixed to said substrate and surrounding at least a portion of said LED devices;
a substantially transparent polymeric encapsulant disposed on said plurality of LED devices and restrained by said outer dike, wherein said substrate is coupled to a reflector ring and wherein a portion of said reflector ring serves as said outer dike.
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3. A light engine comprising:
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a high thermal conductivity substrate;
a plurality of light-emitting-diode (LED) devices mechanically connected to said substrate, said LED devices electrically interconnected in a circuit having first and second terminals, said first and second terminals configured to accept an input voltage;
an outer dike fixed to said substrate and surrounding at least a portion of said LED devices;
a substantially transparent polymeric encapsulant disposed on said plurality of LED devices and restrained by said outer dike;
wherein said plurality of LED devices comprises ratios of individually selected LED colors selected to achieve a substantially white light with a target correlated color temperature (CCT), and wherein said CCT is between approximately 2000 degrees K. and 10000 degrees K.
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4. A light engine comprising:
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a high thermal conductivity substrate;
a plurality of light-emitting-diode (LED) devices mechanically connected to said substrate, said LED devices electrically interconnected in a circuit having first and second terminals, said first and second terminals configured to accept an input voltage;
an outer dike fixed to said substrate and surrounding at least a portion of said LED devices;
a substantially transparent polymeric encapsulant disposed on said plurality of LED devices and restrained by said outer dike, wherein said substrate is coupled to a reflector ring, and, wherein said reflector ring includes a reflector plating and a texture configured to mix light.
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5. An LED light engine comprising:
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a substrate comprising a metal-clad printed circuit board;
a plurality of light emitting-diode (LED) semiconductor devices mechanically connected to said substrate, said LED devices electrically interconnected in a circuit having first and second terminals, said first and second terminals configured to accept an input voltage;
a reflector ring fixed to said substrate and surrounding at least a portion of said LED devices;
a substantially transparent polymeric encapsulant disposed on said plurality of LED devices and restrained by said reflector ring. - View Dependent Claims (6)
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Specification