Patent ID: 9246070
Filing Date: 2016-01-26
CPC Classification: H01L

Claim Text:
1. A light-emitting device comprising: a light-emitting die having (i) a top face and a bottom face opposite the top face, at least one of the top or bottom faces being configured for emission of light therefrom, and (ii) at least one sidewall spanning the top and bottom faces; a first phosphor element disposed over substantially all of the top face and the at least one sidewall of the light-emitting die, the first phosphor element having (i) a base substantially coplanar with the bottom face of the light-emitting die, and (ii) a top surface opposite the base; and a second phosphor element disposed over and in contact with the first phosphor element, the second phosphor element comprising (i) a binder and (ii) disposed within the binder, one or more wavelength-conversion materials for absorbing at least a portion of light emitted from the light-emitting die and emitting converted light having a different wavelength, converted light combining with unconverted light emitted from the light-emitting die to form substantially white light, wherein (i) at least a portion of the top surface of the first phosphor element is curved, (ii) a vertical distance between the top surface of the first phosphor element and the top face of the light-emitting die has a minimum at approximately a center of the top face of the light-emitting die, and (iii) a divergence of color temperature of the substantially white light emitted from the device varies, over an angular range of 10° to 85°, no more than 0.01 in terms of Δu′v′ deviation from a spatially weighted averaged chromaticity.