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US 7,804,103 B1Granted
White lighting device having short wavelength semiconductor die and trichromatic wavelength conversion layers
AssigneeLEDnovation, Inc.
InventorsJinhui Zhai, Israel Morejon, Thong Bui
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Abstract
A high color rendering index (CRI) white light emitting device from a short wavelength semiconductor die is encapsulated with nanoparticle-loaded resin. Trichromatic wavelength conversion micro-particles are dispersed layer by layer in a converting sequence from a long emission spectrum to a short emission spectrum. The refractive index of wavelength conversion micro-particles matches that of the nanoparticle-loaded encapsulants.
Claims6
A semiconductor warm white light emitting device, comprising:
- at least one short wavelength semiconductor light emitting component;
- a plurality of trichromatic wavelength converting layers arranged in a predetermined sequence so that light emitted by said at least one short wavelength semiconductor light emitting component must pass through said trichromatic wavelength converting layers prior to exiting said device;
- said at least one primary short wavelength light emitting component being packaged on a thermally conductive substrate;
- said at least one short wavelength light emitting component being encapsulated by a first wavelength conversion layer;
- and
- said first wavelength conversion layer including a nanoparticle-loaded resin layer dispersed with refractive index matched wavelength conversion micro-particles, thereby creating a first wavelength spectrum of excited light.
3 more elements
Dependencies are inferred from the claim text.