Patent ID: 7782290

Claim:
A source driver circuit for use in a display panel, the source driver circuit comprising: a plurality of digital-to-analog converting units; and a plurality of sampling-transmitting units, each of the sampling-transmitting units comprising: a first latch unit comprising a first sub-latch unit for receiving a first input enable signal and a first output enable signal and a second sub-latch unit for receiving a second input enable signal and a second output enable signal, wherein the first and second input enable signals are enabled in a first period, and the first and second output enable signals are disabled so that the first sub-latch unit and the second sub-latch unit samples first pixel data and second pixel data, respectively; a second latch unit comprising a third sub-latch unit for receiving a third input enable signal and a third output enable signal and a fourth sub-latch unit for receiving a fourth input enable signal and a fourth output enable signal, wherein the third and fourth input enable signals are enabled in a second period and the third and fourth output enable signals are disabled so that the third sub-latch unit and the fourth sub-latch unit samples third pixel data and fourth pixel data, respectively; and a transmission channel set for electrically coupling the first latch unit and the second latch unit to the corresponding digital-to-analog converting unit, wherein: in the second period, the first and second output enable signals are sequentially enabled, and the first and second input enable signals are disabled so that the first sub-latch unit and the second sub-latch unit sequentially output the first pixel data and the second pixel data to the corresponding digital-to-analog converting unit via the transmission channel set; and in a third period, the third and fourth output enable signals are sequentially enabled and the third and fourth input enable signals are disabled so that the third sub-latch unit and the fourth sub-latch unit sequentially output the third pixel data and the fourth pixel data to the corresponding digital-to-analog converting unit via the transmission channel set.