Patent ID: 8053804

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, the upper heat dissipation plate has rectangular cross section; 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 is directly connected to the upper heat dissipation plate and the lower heat dissipation plate, wherein the LED packages comprise an LED chip, the LED chip is not disposed on the upper heat dissipation plate.