Patent ID: 7527409

Claim:
An edge light type display unit comprising: a plurality of light generating sources; a substrate on which said light generating sources are mounted; a lens directing light beams from the light generating sources in one direction; a diffusion plate expanding the light beams input from an incident surface in a side surface of said diffusion plate and outgoing from said lens to a surface shape so as to irradiate to a front surface of said diffusion plate; and a liquid crystal panel attached to said front surface of said diffusion plate, wherein the display unit is provided with a heat sink attached so as to be thermally contacted with an opposite side to a light generating source mounting surface of said substrate, and one or a plurality of fans, a base portion of said heat sink has a substrate mounting surface and a fin constituting surface, said fin constituting surface is substantially perpendicular to said substrate mounting surface, at least one fin mounted on said fin constituting surface so as to extend from said fin constituting surface in a direction substantially perpendicular thereto and to extend along said plurality of said light generating sources in a direction parallel to said substrate, and an air supply and exhaust surface of a cooling air are formed in a back surface side of the display unit so that the cooling air is sucked from the back surface side and is exhausted at the back surface side proximate to an end portion of the at least one fin.