Patent ID: 9557010
Date: 2017-01-31
CPC Classifications: F21K,F21V,F21Y

Claim:
1. A lighting device comprising: a cover including an opening formed in a lower portion with an empty interior; a heat sink including a body and a member, the body including a top surface, an outer circumferential surface and a plurality of fins disposed on the outer circumferential surface, the member extended from the top surface toward the cover, the member having a polygonal pillar shape with at least three sides; and a light source disposed on at least one among the sides of the member, the light source including a substrate, a plurality of light emitting devices disposed on the substrate and a lens unit disposed on the light emitting devices, the lens unit covering the light emitting devices, a shape of a bottom surface of the lens unit corresponding to a top surface of the substrate, wherein an entire portion of the plurality of fins are arranged under the top surface of the heat sink, wherein the fin includes a first point having a maximum height from the outer circumferential surface of the heat sink, and a second point nearest the top surface of the heat sink, wherein an angle between an imaginary line passing through the first point and the second point, and the top surface of the heat sink is less than 135 degrees, and wherein a height of the member is greater than half a height of the cover on the basis of the top surface of the heat sink.