Patent ID: 8730147

Claim:
A backlight control circuit which controls a backlight unit including a plurality of light sources which emits light, the backlight control circuit comprising: a shift register which receives and stores digital video data based on a transmission clock signal input to the shift register, the digital video data based on a video signal having a predetermined period; a first divider which divides the transmission clock signal to generate a first clock signal; a counter/decoder which initializes a count value based on a vertical synchronization signal, counts a number of pulses of the first clock signal, and outputs a decoding signal obtained by decoding the count value obtained by counting the number of the pulses of the first clock signal, wherein the decoding signal is used to set an output timing of the digital video data stored in the shift register; a plurality of data registers which receives and stores the digital video data stored in the shift register based on the decoding signal; a second divider which divides the transmission clock signal to generate a second clock signal; and a plurality of control signal generators which generates brightness control signals based on the second clock signal in response to the digital video data stored in the data registers to locally control a brightness of light sources of the plurality of light sources, wherein the transmission clock signal is directly applied to the first divider and the second divider.