| 摘要 |
A backlight control circuit includes a shift register, first and second dividers, a counter/decoder, data registers and control signal generators. The shift register stores digital video data based on a transmission clock signal. The first and second dividers divide the transmission clock signal to generate first and second clock signals, respectively. The counter/decoder counts a number of pulses of the first clock signal and outputs a decoding signal. The decoding signal is used to set an output timing of the digital video data stored in the shift register. The data registers receive and store the digital video data stored in the shift register based on the decoding signal. The control signal generators generate 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 a plurality of light sources. |
