White Light Emitting Device and Diffusing Layer
AssigneeBridgelux, Inc.
InventorsTao Xu, Aaron Merrill, Yi-Qun Li
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Abstract
There is provided a white light emitting device comprising a first LED and a second LED disposed on a substrate, a first photoluminescence material layer disposed over at least said first LED, a second photoluminescence material layer disposed over at least said second LED, and a diffusing layer disposed over said first and second photoluminescence layers, said diffusing layer comprising light scattering particles. A method and component are also provided.
Claims30
A white light emitting device comprising a first LED and a second LED disposed on a substrate, a first photoluminescence material layer disposed over at least said first LED, a second photoluminescence material layer disposed over at least said second LED, and a diffusing layer disposed over said first and second photoluminescence layers, said diffusing layer comprising light scattering particles.
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A method of manufacturing a white light emitting device, comprising the steps of:
- providing an array of first LEDs;
- dispensing a first photoluminescence material layer at least over said array of first LEDs;
- providing an array of second LEDs;
- dispensing a second photoluminescence material layer at least over said array of second LEDs;
- and
- dispensing a diffusing layer over said first and second photoluminescence material layers.
A white light emitting device comprising alternating arrays of first LEDs and second LEDs disposed on a substrate, a first photoluminescence material layer disposed over at least said array of first LEDs, a second photoluminescence material layer disposed over at least said array of second LEDs, and a diffusing layer disposed over said first and second photoluminescence material layers, the diffusing layer comprising light scattering particles,
- wherein the first photoluminescence material layer comprises a first phosphor material excitable to generate white light having a first correlated color temperature, the second photoluminescence material layer comprises a second phosphor material excitable to generate white light having a second correlated color temperature.
A component for a white light emitting device, comprising alternating strips of first and second photoluminescence material layers disposed on a substrate, and a diffusing layer disposed over said alternating strips of first and second photoluminescence material layers, the diffusing layer comprising light scattering particles,
- wherein the first photoluminescence material layer comprises a first phosphor material excitable to generate white light having a first correlated color temperature, and the second photoluminescence material layer comprises a second phosphor material excitable to generate light having a second correlated color temperature.
Dependencies are inferred from the claim text.