| 摘要 |
A source driver for controlling a slew rate and a driving method thereof are provided to prevent a displayed image from being distorted by reducing the variation of the slew rate within a predetermined range. A source driver for an LCD(Liquid Crystal Display) device includes plural output buffers for driving data lines, and a bias circuit for varying a bias voltage, which is inputted to the output buffers according to slew rate distribution of the output buffers. The output buffer includes a bias current source(1213), an input unit(1215), an amplification output unit(1217), and a capacitor(1219). The bias current source receives a bias voltage and outputs a bias current. The input unit receives an analog image signal and a data line driving signal as a differential pair, and outputs a differential current, which is varied according to the bias current. The amplification output unit generates the data line driving signal in response to the differential current. The capacitor stabilizes frequency characteristics of the data line driving signal.
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