Patent ID: 9680075
Date: 2017-06-13
CPC Classifications: F21K,F21S,F21V,F21Y,H01L

Claim:
1. A light-emitting device comprising: a mounting substrate having a first surface and a second surface facing the first surface; an LED chip bonded to the first surface with a bond; and an encapsulating portion covering the LED chip on the first surface, wherein the bond allows light emitted from the LED chip to pass therethrough, the mounting substrate includes: the first penetrating wiring is electrically connected to the first external electrode, and the second penetrating wiring is electrically connected to the second external electrode, the first electrode of the LED chip is directly connected to the first penetrating wiring via the first wire, and the second electrode of the LED chip is directly connected to the second penetrating wiring via the second wire, the encapsulating portion covers the first wire and the second wire, the light-transmissive member being constituted by a first ceramic layer and a second ceramic layer, which are stacked in the thickness direction, the first ceramic layer and the second ceramic layer being arranged from the LED chip in order of the first ceramic layer and the second ceramic layer, the first ceramic layer being thicker than the second ceramic layer, the first ceramic layer including ceramic particles having a greater particle diameter than ceramic particles of the second ceramic layer, the ceramic particles of the second ceramic layer further including pores, and the first ceramic layer and the second ceramic layer having different optical properties, the second ceramic layer being disposed farther from the LED chip and being higher in reflectance to the light emitted from the LED chip than the first ceramic layer, the first ceramic layer configured to refract the light transmitted from the LED chip to modify its trajectory from its entry to prevent the light from being reflected back towards the LED chip, the second ceramic layer configured to further refract the light to direct the received light away from the second surface of the mounting substrate, the LED chip being bonded to one surface of the light-transmissive member via the bond, and the light-transmissive member having translucency and diffusibility to the light that is emitted from the LED chip.