Patent ID: 8482507

Claim:
A liquid crystal display comprising: a liquid crystal display panel which displays a picture; a backlight unit including a light guide plate part in which a plurality of light guide channels are formed, and a plurality of light sources for illuminating light to the light guide channels, wherein the backlight unit divides surface light which is illustrated to the liquid crystal panel to correspond to the plurality of light guide channels; a division driving controller for mapping an input picture to a plurality of blocks in which a plurality of data channels are intersected with the plurality of light guide channels, analyzing luminance of the input picture for each block, determining dimming values of the plurality of light sources, and independently modulating the luminance of the input picture for each block based on the analyzed result, wherein the division driving controller comprises: a picture analyzer for obtaining a target luminance value for each block of the input picture; a data modulator for determining a first luminance value for each block in consideration of the target luminance and modulating the input picture according to the first luminance value; and a dimming controller for determining a second luminance value for each block in consideration of the target luminance and determining the dimming values according to the second luminance value, wherein the target luminance value for each block is obtained by summing the first luminance value and the second luminance value; and a light source driver for independently controlling luminance of the light sources responding to the dimming values, wherein the light guide plate part comprises a single light guide plate in which a plurality of intaglio pattern lines are formed on an upper surface of the single light guide plate in parallel with a propagation direction of the light illuminated from the light sources to the single light guide plate to define the light guide channels.