Patent ID: 8212766

Claim:
A backlight unit comprising: a bottom cover; a plurality of light emitting device assemblies, wherein each of the light emitting device assemblies has a light emitting device module, wherein the light emitting device assemblies are arranged in a matrix having a plurality of columns and a plurality of rows on the bottom cover and are adjacent to one another, and wherein a predetermined number of light emitting diodes are grouped as a light emission unit such that at least two light emission units form the light emitting device module; a power supply unit configured to supply power to the light emitting device module; and a control unit configured to control the power supply unit, such that, in the light emitting device assembly, intensity of current supplied to a light emission diode positioned at an edge region of the light emitting device assembly is different from intensity of current supplied to a light emission diode positioned at a middle region of the light emitting device assembly, and such that in the plurality of the light emitting device assemblies, an intensity of current to the light emission units in the light emitting device module of at least one light emitting device assembly arranged at an outermost column and at a lowest row is greater than an intensity of current to any of the other light emission units.