Patent ID: 7795635

Claim:
A backlight unit equipped with Light-Emitting Diodes (LEDs), comprising: an insulating substrate provided with predetermined circuit patterns on one surface thereof; a plurality of LED packages mounted above the insulating substrate and electrically connected to the circuit patterns; an upper heat dissipation plate formed on the insulating substrate, and configured to come into contact with the circuit patterns and to dissipate heat generated in the LED packages; a lower heat dissipation plate formed on a remaining surface of the insulating substrate, and configured to transmit heat transmitted through the upper heat dissipation plate; and a chassis disposed in the remaining surface of the insulating substrate and fixedly combined with the insulating substrate, wherein the upper heat dissipation plate and the lower heat dissipation plate are connected to each other by at least one through hole that passes through the insulating substrate and is plated with plating material on an inner wall thereof, and the through hole and the upper heat dissipation plate have a predetermined area ratio, the insulating substrate is provided with an insulating film which is configured to cover the lower heat dissipation plate, wherein the insulating substrate and the chassis are combined with each other using a fastener penetrating at least a corner of the insulating substrate and the chassis.