Patent ID: 8692957

Claim:
A scanning backlight unit comprising: a first light source unit including plural groups of first light sources, the plural groups of first light sources being configured to generate light independently; a control unit configured to control the plural groups of the first light sources; and a light guiding plate configured to transmit the light generated from the first light source unit to a liquid crystal panel, wherein the light guiding plate comprises: a first side configured to receive the light generated by the first light source unit; a bottom surface including a dispersion pattern configured to disperse the light received from the first side; and a top surface configured to transmit the light towards the liquid crystal panel, wherein the top surface of the light guiding plate comprises a lenticular lens having a length which is parallel to a main incidence direction of the light generated by the first light source unit, wherein the dispersion pattern comprises a plurality of grooves, with a groove of the plurality of grooves having a shape that includes a curved cross section, a first dimension in a first direction that is parallel to the main incidence direction of the first light source unit and a second dimension in a second direction which is perpendicular to the main incidence direction of the first light source unit, and wherein the first dimension greater than the second dimension.