HEATSINK THAT MOTIVE CONVECTION CURRENT FLOWING

摘要

PURPOSE: A heat sink which induces the convection of air is provided to reduce manufacturing costs and a volume by coating heat radiation coating agents mixed with black carbon on the surface of a metal sheet. CONSTITUTION: A heat sink is attached to the upper side of a lighting unit. Heat radiation coating agents are coated on the surface of a metal sheet(11). A first air path(13) induces the convection of air. A second air path(14) is formed with a furrow shape. A plurality of through holes(13a) are formed by punching the upper side of the first air path.