Patent ID: 8531387

Claim:
A display device comprising: a backlight unit that is divided into a plurality of blocks and is driven by the divided blocks, and includes a plurality of optical assemblies; a display panel positioned over the backlight unit; a controller that outputs local dimming values corresponding to brightness of the blocks of the backlight unit, in accordance with an image displayed in the display panel; and a BLU driver that controls brightness of the blocks of the backlight unit using the local dimming values, wherein each of the plurality of optical assemblies includes: a first layer; a plurality of light sources that are formed on the first layer and emit light; and a reflective layer that is disposed above the first layer, wherein the BLU driver receives the local dimming values and outputs a plurality of driving signals, and the driving signals control the brightness of two or more blocks among the blocks of the backlight unit respectively, wherein each of the plurality of optical assemblies is combinable with the other, and the backlight unit is formed by combining the plurality of optical assemblies, and wherein a light emitting surface of one of the light sources is formed in a direction crossing the first layer, and at least two of the light sources emit light in different directions from each other.