TFT-LCD source driver integrated circuit for improving display quality and Method for eliminating offset of output amplifier

A thin film transistor-offset removal of the liquid crystal display (TFT-LCD) driving a source driver integrated circuit and an output amplifier for the method are disclosed. A source driver integrated circuit for the TFT-LCD of the present invention includes an output driver and a control module. Output drivers for outputting a voltage for driving the panel in response to the clock signal driving the liquid crystal panel, a decoder and amplifier. The decoder output by selecting a gray voltage corresponding to the digital signal, and the amplifier is output as panel drive voltage to amplify the output signal of the decoder. One input terminal of the amplifier receives the output signal of the decoder, and the other input terminal is connected to the output terminals and electrically, the input terminal is changed in response to a predetermined change of the control signal. The control module is responsive to a predetermined polarity control signal generated by the alternating clock signal and a frame unit to generate a change control signal to alternate the input terminal of the amplifier.