Patent ID: 8690392
Filing Date: 2014-04-08
Classification: F21K,F21S,F21V,F21Y,H01L

Abstract:
1. A light source unit comprising: a substrate comprising: a substrate body made of a resin having an electric insulation, the substrate body having a first surface, second surface opposite to the first surface, and a side surface between the first surface and the second surface; a plurality of light emitting elements mounted on the first surface; and a thermal conduction layer made of metal disposed only on the second surface; a heat-radiating body comprising: a plate-like metallic portion, and a side part metallic portion being thermally coupled to the plate-like metallic portion, covering the side surface of the substrate, and being exposed outside; an electric insulation layer sandwiched between the thermal conduction layer and the plate-like metallic portion; and a reflector made of a resin disposed on the side part metallic portion of the heat radiating body, the reflector having a reflecting surface for reflecting a light from the light emitting elements, wherein the plate-like metallic portion is thermally coupled to the thermal conduction layer through the electric insulation layer, and has a size larger than that of the substrate so that the plate-like metallic portion extends beyond an edge of the substrate; and the heat-radiating body has a heat conduction path from the plate-like metallic portion to the side part metallic portion.