Patent ID: 8853729
Filing Date: 2014-10-07
Classification: H01L

Abstract:
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 light-emitting 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 converted light and unconverted light emitted by the light-emitting die combine to form substantially white light, wherein 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 u′ and v′ are chromaticity coordinates on a chromaticity diagram; wherein (i) a concentration of the wavelength-conversion particles varies in a direction substantially perpendicular to the top and bottom faces without varying radially toward or away from the light-emitting die within a plane parallel to at least one of the top or bottom faces of the light-emitting die, and (ii) the concentration of the wavelength-conversion particles decreases in a direction extending from the top face of the light-emitting die to the bottom face of the light-emitting die.