Patent ID: 8711080

Claim:
A backlight assembly that supplies light to a liquid crystal display panel, the backlight assembly comprising: a light emitting diode assembly comprising at least one light emitting diode block region having a plurality of light emitting diodes; a backlight unit driving unit comprising a color control unit configured to determine a representative color of the light emitting diode block region using at least one image signal supplied to the liquid crystal display panel, wherein color classes are determined for the at least one image signal, wherein the color classes are mapped into color regions in a color coordinate system, wherein the color regions are determined according to visibilities, wherein the color control unit defines a visibility associated with a color region in the color coordinate system into which the color classes of the at least one image signal are most frequently mapped as the representative color of the light emitting diode block region, and wherein at least one color class of the color classes of the at least one image signal corresponds to a plurality of color gradations; and a dimming control unit configured to control color of the light emitting diode block region based on the representative color of the light emitting diode block region determined by the color control unit, wherein the light emitting diode assembly comprises red light emitting diodes, green light emitting diodes, blue light emitting diodes, and white light emitting diodes, and wherein brightness of the light emitting diode assembly is adjusted by adjusting brightness of the white light emitting diodes without adjusting brightness of the red light emitting diodes, the green light emitting diodes, or the blue light emitting diodes.