Patent ID: 7675495

Claim:
A TFT-LCD (Thin Film Transistor Liquid Crystal Display) capable of repairing discontinuous lines, the LCD having at least one data line driving unit for driving a plurality of data lines, at least one scan line driving unit for driving a plurality of scan lines, and a plurality of repairing circuit units for repairing discontinuous data lines among the data lines, each of the repairing circuit units comprising: at least one input terminal repairing trace, wherein when there is at least a discontinuous data line needed to be repaired, one of the input terminal repairing traces is connected to one of the discontinuous data lines; a plurality of repairing OP amplifiers, each including an input terminal, an output terminal and a control terminal, the input terminal of one of the repairing OP amplifiers is connected to the input terminal repairing trace connected to one of the discontinuous data lines; a high-impedance detecting module for detecting a voltage at the input terminal of each of the repairing OP amplifiers and generating an OP control signal for each of the repairing OP amplifiers, the OP control signal being disabled when the input terminal of the corresponding repairing OP amplifier is floating, otherwise the OP control signal being enabled; and at least one output terminal repairing trace connected to the output terminal of each of the repairing OP amplifiers; wherein each of the repairing OP amplifiers further receives the corresponding OP control signal of the high-impedance detecting module and sets its output terminal to a high-impedance state when the corresponding OP control signal is disabled, and the OP amplifier outputs a signal according to the voltage at the input terminal when the OP control signal is enabled.