| 主权项 |
1. A light-emitting device comprising:
a bare light-emitting die having (i) a top face and a bottom face opposite the top face, at least one of the top or bottom face being configured for emission of light therefrom, and (ii) a sidewall spanning the top and bottom faces; a binder having top and bottom surfaces, at least one of which is substantially parallel to the top face of the die, wherein at least a portion of the binder is disposed over the top face of the light-emitting die; 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 (i) the plurality of wavelength-conversion particles comprises a first plurality of wavelength-conversion particles of a first type and a second plurality of wavelength-conversion particles of a second type different from the first type, (ii) throughout the binder, a concentration of the first plurality of wavelength-conversion particles relative to a total concentration of wavelength-conversion particles is within 20% of a concentration of the second plurality of wavelength-conversion particles relative to the total concentration of wavelength-conversion particles, (iii) the total concentration of the wavelength-conversion particles varies in a direction substantially perpendicular to at least one of the top or bottom faces without varying radially toward or away from the light-emitting die, (iv) the first type of wavelength-conversion particle has a first density, and (v) the second type of wavelength-conversion particle has a second density different from the first density. |
