Patent ID: 8284349

Claim:
A backlight unit, comprising: A plurality of light emitting diodes as a light source; A board having a rectangular shape and including a plurality of metal lines each extending along a first direction, wherein the plurality of light emitting diodes are arranged on the board and respectively connected to the plurality of metal lines; A pad portion attached to a side, which is parallel to the first direction of the board and including first to Nth pads respectively connected to the plurality of metal lines, wherein N is a positive integer greater than 1; A driving circuit connected to the first to Nth pads and providing a driving signal into the plurality of light emitting diodes; and An optical member at a side of the light emitting diodes and for improving a light property, Wherein the first pad has a larger width and a smaller length than the Nth pad, and Wherein the width of each of the first to Nth pads is defined as a distance between opposite sides thereof along the first direction, and the length of each of the first to Nth pads is defined as a distance between opposite sides thereof along a second direction perpendicular to the first direction.