Patent ID: 7663730

Claim:
A heat radiator provided in a transmissive display unit in which a plurality of rows of light emitting arrays constituted by arranging a plurality of light emitting units including a plurality of light emitting diodes mounted on a wiring substrate are arranged on a back surface portion of a transmissive display panel, and for illuminating light emitted from the light emitting diodes to the display panel, comprising: a radiation plate which is formed by a metal material having heat conductance and which is configured to support each wiring substrate on a first surface thereof to constitute the light emitting unit; a back panel which is formed by a metal material having heat conductance and on a first surface of which the radiation plate is mounted by fixing a second surface of the radiation plate; and a heat sink which is formed by a metal material having heat conductance, which includes a base and a plurality of fins integrally formed at predetermined intervals on a first surface of the base, which is mounted to a second surface of the back panel using a second surface of the base as a mounting surface, and which radiates heat from each of the fins by conducting heat generated by a lighting operation of the light emitting diodes according to heat conduction means, wherein the heat sink is disposed facing to a portion of the radiation plate through the back panel to constitute an overlap portion, where a plurality of mounting holes are formed in each of the radiation plate, back panel, and heat sink as to communicate with each other, and the radiation plate and heat sink are integrated with each other through the back panel by fixing members inserted in the mounting holes, and wherein the back panel has a thickness which is smaller than the thickness of the radiation plate and is smaller than the thickness of the base of the heat sink.