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US 2014/0231854 A1Published application
Engineered-phosphor led packages and related methods
AssigneeCooledge Lighting Inc.
InventorsMichael A. Tishcler, Ian Ashdown
Life of this patent
Estimating the term…
Abstract
In accordance with certain embodiments, regions of spatially varying wavelength-conversion particle concentration are formed over light-emitting dies.
Claims31
-28. (canceled)
A light-emitting device comprising:
- a bare light-emitting die having an emission surface;
- a binder disposed over at least a portion of the emission surface;
- and
- disposed within the binder, a plurality of wavelength-conversion particles for absorbing at least a portion of light emitted from the light-emitting die and emitting converted light having a different wavelength, wherein (i) converted light and unconverted light emitted by the light-emitting die combine to form substantially white light, (ii) a divergence of color temperature of the substantially white light emitted from the light-emitting device varies, over an angular range of 0° to 70°, no more than 0.01 in terms of a Δu′v′ deviation from a spatially weighted averaged chromaticity, and (iii) u′ and v′ are chromaticity coordinates on a chromaticity diagram,
- wherein a concentration of the wavelength-conversion particles varies in a direction substantially perpendicular to the emission surface.
2 more elements
Dependencies are inferred from the claim text.