CN102013235A - TFT-LCD (Thin Film Transistor-Liquid Crystal Display) drive circuit - Google Patents

Abstract

The invention discloses a TFT-LCD (Thin Film Transistor-Liquid Crystal Display) drive circuit comprising a public electrode signal generating module and a compensating circuit, wherein the public electrode signal generating module is used for generating public electrode signals; the compensating circuit is connected with the public electrode signal generating module and an electrode which is arranged on a panel and is used for receiving the public electrode signals, the compensating circuit is used for compensating the voltage of the electrode used for receiving the public electrode signals so that the voltage of the electrodes for receiving the public electrode signals in different positions on the panel achieves respective target voltage. The TFT-LCD drive circuit can reduce TFT-LCD picture scintillation and residual direct-current components.

Description

TFT-LCD driving circuit

technical field

The present invention relates to liquid crystal display drive technology, in particular to a thin film transistor liquid crystal display (Thin Film Transistor Liquid Crystal Display, referred to as TFT-LCD) drive circuit.

Background technique

TFT-LCD mainly includes a liquid crystal panel, a gate drive circuit, a source drive circuit, a timing controller and a backlight source. The liquid crystal panel is composed of an array substrate, a color filter substrate, and a liquid crystal arranged in between. The data line and the gate line are formed on the array substrate, and the thin film transistor (Thin Film Transistor, TFT for short) arranged at the intersection of the gate line and the data line is used for The data signal is transmitted to the pixel electrode of the array substrate. As shown in Figure 1, it is a schematic structural diagram of a TFT-LCD driving circuit in the prior art, and a timing controller (Timing Controller, referred to as TCON) 1 is used to generate a control signal for controlling the source driving circuit 2 according to an input synchronous signal And the control signal used to control the gate drive circuit 3, the synchronous signal includes a horizontal synchronous signal, a vertical synchronous signal and a data valid (Data Enable, referred to as DE) signal, etc.; The signal required by the source drive circuit 2, the signal required by the gate drive circuit 3, and the common electrode signal (commonly referred to as the VCOM signal in the art); the gamma generation module 5 is used to generate The signal required by the source drive circuit 2 generates a plurality of voltage signals that determine the gamma gray scale, and inputs the generated multiple voltage signals that determine the gamma gray scale to the source drive circuit 2; the gate drive circuit 3 is used for According to the signal required by the gate drive circuit 3 input by the timing controller 1, a signal for controlling the gate line to be turned on or off is generated; the source drive circuit 2 is generated according to the signal required by the source drive circuit generated by the timing controller 1, A data signal required for driving the liquid crystal is generated, and the data signal is input to the pixel electrode on the panel 6 . The source driving circuit 2 includes a plurality of source driving sub-circuits, for example, a first source driving sub-circuit 2a, a second source driving sub-circuit 2b and a third source driving sub-circuit 2c, and each source driving sub-circuit is responsible for Drive a portion of the data lines. The gate drive circuit 3 includes a plurality of gate drive sub-circuits, for example, a first gate drive sub-circuit 3a, a second gate drive sub-circuit 3b and a third gate drive sub-circuit 3c, and each gate drive sub-circuit is responsible for Drive a portion of the gate lines. In FIG. 1 , the circuit diagram composed of capacitors and resistors on the panel 6 is a schematic diagram of the equivalent load (LOAD) of the panel 6 .

The voltage difference between the common electrode signal and the data signal applied to the pixel electrode drives the liquid crystal molecules to invert. In order to avoid the aging of the liquid crystal molecules, the polarity of the voltage applied to both sides of the liquid crystal molecules changes every other frame, that is, in the nth frame, the voltage of the data signal applied to the pixel electrode is greater than the voltage of the common electrode signal, and the voltage applied to the liquid crystal The voltage on both sides of the molecule is positive. In the n+1th frame, the voltage of the data signal applied to the pixel electrode is lower than the voltage of the common electrode signal. The nth frame and the n+1th frame keep the common electrode signal voltage unchanged. The voltage applied to both sides of the liquid crystal molecules is negative.

As shown in Figure 2, it is a schematic diagram of inputting the common electrode signal into the panel in the prior art, and the common electrode signal generated by the power module is directly input to a certain fixed point 7a on the flexible circuit board (Chip on Film, COF for short) 7 , the fixed point 7a is connected to the electrode on the panel 6 for receiving the common electrode signal. The common electrode signal input to each electrode for receiving the common electrode signal is the same. Although the line used to represent the common electrode signal in FIG. 2 passes through the source driving circuit 2 , in fact, each source driving sub-circuit in the source driving circuit does not participate in the processing of the common electrode signal.

The problem with the driving method shown in Figure 2 is that the voltages of the signals input on the electrodes on the panel for receiving common electrode signals are the same. The voltage of the common electrode signal required by the position is different. For example, the common electrode signal required by the area covered by the data line driven by the first source drive subcircuit may be a 5.8 volt signal, and the second source drive subcircuit is responsible for the driven data. The common electrode signal required by the area covered by the line may be a 5.5V signal, and the common electrode signal required by the area covered by the data line driven by the third source driving subcircuit may be a 5.3V signal. If the method in the prior art is adopted, the voltages of the signals input on each electrode for receiving the common electrode signal on the panel are all the same, which will cause the TFT-LCD screen to flicker (flicker), and will cause residual DC components (in the art Usually called residual DC) exists, affecting the screen display.

Contents of the invention

The object of the present invention is to solve the problems existing in the prior art, and provide a TFT-LCD driving circuit, which can reduce the flickering of the TFT-LCD screen and reduce the residual DC component.

To achieve the above object, the present invention provides a TFT-LCD driving circuit, including a common electrode signal generation module for generating common electrode signals, and also includes a compensation circuit, which is connected with the common electrode signal generation module and the panel for receiving The electrode connection of the common electrode signal is used to compensate the voltage on the electrodes on the panel for receiving the common electrode signals, so that the voltages on the electrodes at different positions on the panel for receiving the common electrode signals reach their respective target voltage.

Wherein, the compensation circuit includes at least a first compensation circuit and a second compensation circuit;

The first compensation circuit is respectively connected to the common electrode signal generating module and the electrode on the first position on the panel for receiving the common electrode signal, and is used to connect the electrodes on the first position for receiving the common electrode signal to Compensating the voltage so that the voltage on the electrode at the first position for receiving the common electrode signal reaches a first target voltage;

The second compensation circuit is respectively connected to the common electrode signal generating module and the electrode used to receive the common electrode signal at the second position on the panel, and is used to connect the electrode on the electrode used to receive the common electrode signal at the second position to The voltage is compensated so that the voltage on the electrode at the second position for receiving the common electrode signal reaches a second target voltage.

Wherein, the first compensation circuit includes: a first capacitor, a first resistor, a second resistor and a first operational amplifier;

Both ends of the first capacitor are respectively connected to an electrode at a first position on the panel for receiving a common electrode signal and a first resistor, and the first resistor is respectively connected to the first capacitor and the first computing The inverting input terminal of the amplifier is connected, and the second resistor is respectively connected with the inverting input terminal of the first operational amplifier and the output terminal of the first operational amplifier, and the non-inverting input terminal of the first operational amplifier is connected with the output terminal of the first operational amplifier. The common electrode signal generating module is connected, and the output terminal of the first operational amplifier is connected to the electrode at the first position on the panel for receiving the common electrode signal.

The second compensation circuit includes: a second capacitor, a third resistor, a fourth resistor and a second operational amplifier;

The two ends of the second capacitor are respectively connected to the second detection module and the third resistor, and the third resistor is respectively connected to the second capacitor and the inverting input terminal of the second operational amplifier, and the fourth The resistors are respectively connected to the inverting input terminal of the second operational amplifier and the output terminal of the second operational amplifier, the non-inverting input terminal of the second operational amplifier is connected to the common electrode signal generation module, and the second The output end of the operational amplifier is connected to the electrode at the second position on the panel for receiving the common electrode signal.

The first compensation circuit and the second compensation circuit may be provided in the source drive circuit, or the first compensation circuit and the second compensation circuit may be provided in the gate drive circuit.

The TFT-LCD driving circuit provided by the present invention adopts a compensation circuit to compensate the voltage on the electrodes on the panel for receiving common electrode signals, so that the voltages on the electrodes at different positions on the panel for receiving common electrode signals can be respectively Reaching the respective target voltages can reduce the flicker of the TFT-LCD screen, reduce the residual DC component, and improve the display effect of the screen.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 shows a schematic structural diagram of a TFT-LCD driving circuit in the prior art;

FIG. 2 is a schematic diagram of inputting a common electrode signal into a panel in the prior art;

Fig. 3 shows the structural representation of TFT-LCD driving circuit of the present invention;

Fig. 4 shows the structural representation of the first embodiment of the TFT-LCD driving circuit of the present invention;

Figure 5 is a schematic diagram of the working principle of Figure 4;

Fig. 6 shows the structural representation of the second embodiment of the TFT-LCD driving circuit of the present invention;

FIG. 7 is a schematic structural diagram of a third embodiment of a TFT-LCD driving circuit of the present invention;

FIG. 8 is a schematic structural diagram of a fourth embodiment of a TFT-LCD drive circuit according to the present invention.

Detailed ways

As shown in Figure 3, it is a schematic structural diagram of the TFT-LCD driving circuit of the present invention, the driving circuit includes a common electrode signal generation module 1A and a compensation circuit 1B for generating common electrode signals, and the compensation circuit 1B is connected with the common electrode signal generation module 1A and the compensation circuit 1B respectively. The electrode connections on the panel for receiving common electrode signals are used to compensate the voltage on the electrodes on the panel for receiving common electrode signals, so that the voltages on the electrodes at different positions on the panel for receiving common electrode signals reach their respective target voltages.

The TFT-LCD driving circuit provided by the present invention adopts a compensation circuit to compensate the voltage on the electrodes on the panel for receiving common electrode signals, so that the voltages on the electrodes at different positions on the panel for receiving common electrode signals can be respectively Reaching the respective target voltages can reduce the flicker of the TFT-LCD screen, reduce the residual DC component, and improve the display effect of the screen.

As shown in Figure 4, it is a schematic structural diagram of the first embodiment of the TFT-LCD drive circuit of the present invention, in this embodiment, the compensation circuit 1B at least includes a first compensation circuit 12 and a second compensation circuit 13; the first compensation circuit 12 is respectively It is connected with the common electrode signal generation module 1A and the electrode for receiving the common electrode signal at the first position on the array substrate, and is used to compensate the voltage on the electrode for receiving the common electrode signal at the first position, so that the first position The voltage on the electrode for receiving the common electrode signal reaches the first target voltage; the second compensation circuit 13 is respectively connected with the common electrode signal generating module 1A and the electrode for receiving the common electrode signal at the second position on the panel, for Compensating the voltage on the electrode at the second position for receiving the common electrode signal, so that the voltage at the electrode at the second position for receiving the common electrode signal reaches a second target voltage. By detecting the characteristics of the panel, it is possible to obtain the actual required voltage of the common electrode signal at each position of the panel when the screen display flicker of the panel is minimum, that is to say, the first target voltage and the second target voltage are related to the characteristics of the panel. relationship, which can be obtained in advance by testing.

In FIG. 4 , the common electrode signal generation module may be various modules for generating common electrode signals, such as the power supply module in FIG. 1 .

Fig. 5 is a schematic diagram of the working principle of Fig. 4. The working principle of the driving circuit shown in Fig. 4 is: the voltage of the common electrode signal required by each position is different due to the different loads on the panel 6, assuming that the panel 6 The common electrode signal voltage required by the first position A is the first target voltage, and the common electrode signal voltage required by the second position B is the second target voltage. The common electrode signal generated by the common electrode signal generating module 1A is input to the first compensation circuit 12, and the first compensation circuit 12 compensates the common electrode signal so that the compensated common electrode signal voltage reaches the first target voltage, and then the common electrode signal The electrode signal is input to the electrode at the first position A on the panel 6 for receiving the common electrode signal; similarly, the common electrode signal generated by the common electrode signal generating module 1A is input into the second compensation circuit 13, and the second compensation circuit 13 The common electrode signal is compensated so that the compensated common electrode signal voltage reaches the second target voltage, and then the common electrode signal is input to the electrode for receiving the common electrode signal at the second position B on the panel 6 .

The TFT-LCD drive circuit provided by the first embodiment of the present invention uses the first compensation circuit and the second compensation circuit to compensate the voltages on the electrodes at the first position and the second position on the panel for receiving common electrode signals, The voltages on the electrodes used to receive the common electrode signal at the first position and the second position can respectively reach their respective target voltages, thereby reducing the TFT-LCD screen flicker (flicker), and reducing the residual DC component, improving the picture quality. display effect.

As shown in Figure 6 is a schematic structural diagram of the second embodiment of the TFT-LCD drive circuit of the present invention, wherein the first compensation circuit 12 includes: a first capacitor C1, a first resistor R1, a second resistor R2 and a first operational amplifier OP1 The two ends of the first capacitor C1 are respectively connected to the electrode (not shown in the figure) and the first resistor R1 for receiving the common electrode signal at the first position on the panel 6, and the first resistor R1 is connected to the first capacitor C1 and the first resistor R1 respectively. The inverting input terminal OP1a of the first operational amplifier OP1 is connected, the second resistor R2 is respectively connected with the inverting input terminal OP1b of the first operational amplifier OP1 and the output terminal OP1c of the first operational amplifier OP1, and the non-inverting input of the first operational amplifier OP1 The terminal OP1b is connected to the common electrode signal generating module 1A, and the output terminal OP1c of the first operational amplifier is connected to the electrode at the first position on the panel 6 for receiving the common electrode signal.

The second compensation circuit 13 includes: a second capacitor C2, a third resistor R3, a fourth resistor R4, and a second operational amplifier OP2; The electrode (not shown in the figure) is connected to the third resistor R3, the third resistor R3 is respectively connected to the second capacitor C2 and the inverting input terminal OP2a of the second operational amplifier OP2, and the fourth resistor R4 is respectively connected to the second operational amplifier The inverting input terminal OP2a of OP2 is connected to the output terminal OP2c of the second operational amplifier OP2, the noninverting input terminal OP2b of the second operational amplifier OP2 is connected to the common electrode signal generating module 1A, and the output terminal OP2c of the second operational amplifier OP2 is connected to the panel 6 The electrode connection for receiving the common electrode signal at the second position. In FIG. 6, two circuits on panel 6 are used to represent the equivalent load (LOAD) on the panel.

In the embodiment shown in FIG. 6 , the first compensation circuit and the second compensation circuit are realized by a compensation circuit composed of two operational amplifiers and various resistors and capacitors. For the first compensation circuit, different compensations can be realized by setting the ratio of the resistance values of the first resistor and the second resistor. For example, the resistance value of the first resistor is set to 4.1 kohm, and the blocking value of the second resistor is set to 3.1 kohm. How to set the resistance value of the first resistor and the second resistor needs to generate the common electrode output by the module according to the common electrode signal The difference between the voltage of the signal and the target voltage of the first position is determined. Similarly, for the second compensation point, the required compensation can also be achieved by setting the resistance ratio of the third resistor and the fourth resistor. How to set the resistance value of the third resistor and the fourth resistor needs to be generated according to the common electrode signal The difference between the voltage of the common electrode signal output by the module and the target voltage of the second position is determined. In addition, the capacitance of the first capacitor and the second capacitor can also be adjusted according to the actual needs of each compensation circuit. The first operational amplifier and the second operational amplifier usually also include a power supply terminal and a ground terminal, and signals input from the power supply terminal and the ground terminal make the operational amplifier work.

The common electrode signal generation module can be shown in FIG. 6 , and the common electrode signal generated by the common electrode signal generation module is obtained by dividing the power supply by the fifth resistor R5 and the sixth resistor R6 .

The drive circuit shown in Figure 4 includes two compensation circuits. In fact, more compensation circuits may be included. For example, the panel is divided into multiple positions, each position corresponds to a compensation circuit, and each compensation circuit is respectively connected to The common electrode signal generation module and the electrode connection for receiving the common electrode signal at each position, each compensation circuit performs different compensations on the common electrode signal generated by the common electrode signal generation module, so that each position is used to receive the common electrode signal The voltages on the electrodes can reach their respective target voltages.

The common electrode signal can be generated by the common electrode signal generation module and then input to the electrode on the panel for receiving the common electrode signal; the common electrode signal can also be input into the source drive circuit, and then the source drive circuit converts the common electrode signal Input to the electrode on the panel for receiving the common electrode signal; the common electrode signal can also be input into the gate drive circuit, and then the gate drive circuit inputs the common electrode signal to the electrode on the panel for receiving the common electrode signal superior.

If the common electrode signal is input by the source driving circuit to the electrodes on the panel for receiving the common electrode signal, then the first compensation circuit and the second compensation circuit in FIG. 4 can be set in the source driving circuit. As shown in Figure 7, it is a schematic structural diagram of the third embodiment of the TFT-LCD drive circuit of the present invention. Generally, the source drive circuit includes a plurality of source drive sub-circuits, and two source drive sub-circuits are shown in Figure 7, specifically The first source driving sub-circuit 2a and the second source driving sub-circuit 2b, the first source driving sub-circuit 2a is responsible for driving a part of the data lines, and the second source driving sub-circuit 2b is responsible for driving the other part of the data lines. The first compensation circuit 12 is arranged in the first source drive sub-circuit 2a, and the first compensation circuit 12 is respectively connected to the common electrode signal generation module and the electrode for receiving the common electrode signal at the first position on the panel, and the first position can be is the area covered by the data lines driven by the first source driver sub-circuit 2a. The second compensation circuit 13 is arranged in the second source drive sub-circuit 2b, and the second compensation circuit 13 is respectively connected with the common electrode signal generation module and the electrode for receiving the common electrode signal at the second position on the panel, and the second position can be is the area covered by the data lines driven by the second source driving sub-circuit.

The first compensation circuit 12 and the second compensation circuit 13 can be connected to electrodes at different positions on the panel for receiving common electrode signals through different fixed points on the flexible circuit board 7. For example, in FIG. 7, the first compensation circuit 12 The first fixed point P1 on the flexible circuit board 7 is connected to the electrode for receiving the common electrode signal at the first position, and the second compensation circuit 13 is connected to the electrode at the second position through the second fixed point P2 on the flexible circuit board 7. Connect to the electrode receiving the common electrode signal. The first fixed point P1 and the second fixed point P2 can be regarded as two feedback points, and these two feedback points respectively feed back the voltage of the common electrode signal at the first position and the second position to the first compensation circuit 12 and the second compensation circuit 12 The circuit 13, the first compensation circuit 12 and the second compensation circuit 13 respectively calculate the feedback voltage and the voltage input by the common electrode signal generating module, and input the compensated common electrode signal to the two feedback points respectively.

If the common electrode signal is input from the gate drive circuit to the electrodes on the panel for receiving the common electrode signal, then the first compensation circuit and the second compensation circuit in FIG. 4 can be set in the gate drive circuit. As shown in Figure 8, it is a schematic structural diagram of the fourth embodiment of the TFT-LCD drive circuit of the present invention. Generally, the source drive circuit includes a plurality of gate drive sub-circuits, and two gate drive sub-circuits are shown in Figure 8, specifically The first gate driving sub-circuit 3a and the second gate driving sub-circuit 3b, the first gate driving sub-circuit 3a is responsible for driving a part of the gate lines, and the second gate driving sub-circuit 3b is responsible for driving the other part of the gate lines. The first compensation circuit 12 is arranged in the first gate drive sub-circuit 3a, and the first compensation circuit 12 is respectively connected to the common electrode signal generation module and the electrode for receiving the common electrode signal at the first position on the panel, and the first position can be is the area covered by the gate lines driven by the first gate drive sub-circuit 3a. The second compensation circuit 13 is arranged in the second gate drive sub-circuit 3b, and the second compensation circuit is respectively connected to the common electrode signal generating module and the electrode at the second position on the panel for receiving the common electrode signal, and the second position may be The second gate driving sub-circuit 3b is responsible for driving the area covered by the data lines.

The first compensation circuit 12 and the second compensation circuit 13 can also be connected to electrodes at different positions on the panel for receiving common electrode signals through different fixed points on the flexible circuit board 7. For example, in FIG. 8, the first compensation circuit 12 through the first fixed point P1 on the flexible circuit board 7 is connected to the electrode for receiving the common electrode signal at the first position, and the second compensation circuit 13 is connected to the electrode at the second position through the second fixed point P2 on the flexible circuit board 7 Electrode connection for receiving common electrode signal. The first fixed point P1 and the second fixed point P2 can be regarded as two feedback points, and these two feedback points respectively feed back the voltages of the common electrode signals at the first position and the second position to the first compensation circuit and the second compensation circuit After the first compensation circuit and the second compensation circuit respectively calculate the fed back voltage and the voltage input by the common electrode signal generating module, the compensated common electrode signal is respectively input to the two feedback points.

In TFT-LCD, a storage capacitor is formed between the common electrode signal line on the array substrate and the pixel electrode, and the voltage difference between the common electrode on the color filter substrate and the pixel electrode on the array substrate drives the liquid crystal molecules to reverse. Usually, the common electrode signal line The common electrode signal is input to the common electrode on the color filter substrate. In each embodiment of the present invention, the electrode used to receive the common electrode signal may be the common electrode signal line on the array substrate or the common electrode on the color filter substrate. In some TFT-LCDs, the common electrodes are arranged on the array substrate, so the electrodes used to receive signals from the common electrodes may also be the common electrodes on the array substrate.

In the embodiment of the present invention, since the voltages on the electrodes used to receive the common electrode signal at different positions are different, the electrodes used to receive the common electrode signal should be set according to different positions on the panel, for example, the first position A common electrode should be set at the first position, and a common electrode should be set at the second position, instead of setting the same common electrode for the entire panel.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it still Modifications or equivalent replacements can be made to the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims (7)

1. A TFT-LCD drive circuit, comprising a common electrode signal generation module for generating common electrode signals, characterized in that, also includes a compensation circuit, with the common electrode signal generation module and panel for receiving common electrode signals The electrode connections are used to compensate the voltage on the electrodes on the panel for receiving common electrode signals, so that the voltages on the electrodes at different positions on the panel for receiving common electrode signals reach their respective target voltages. 2. The TFT-LCD drive circuit according to claim 1, wherein the compensation circuit at least comprises a first compensation circuit and a second compensation circuit; The first compensation circuit is respectively connected to the common electrode signal generation module and the electrode for receiving the common electrode signal at the first position on the panel, and is used to connect the electrode for receiving the common electrode signal at the first position to Compensate the voltage on the electrode so that the voltage on the electrode at the first position for receiving the common electrode signal reaches the first target voltage; The second compensation circuit is respectively connected to the common electrode signal generating module and the electrode for receiving the common electrode signal at the second position on the panel, and is used to connect the electrode for receiving the common electrode signal at the second position to Compensate the voltage on the electrode so that the voltage on the electrode at the second position for receiving the common electrode signal reaches the second target voltage. 3. The TFT-LCD drive circuit according to claim 2, wherein the first compensation circuit comprises: a first capacitor, a first resistor, a second resistor and a first operational amplifier; Both ends of the first capacitor are respectively connected to an electrode at a first position on the panel for receiving a common electrode signal and a first resistor, and the first resistor is respectively connected to the first capacitor and the first computing The inverting input terminal of the amplifier is connected, and the second resistor is respectively connected with the inverting input terminal of the first operational amplifier and the output terminal of the first operational amplifier, and the non-inverting input terminal of the first operational amplifier is connected with the output terminal of the first operational amplifier. The common electrode signal generating module is connected, and the output terminal of the first operational amplifier is connected to the electrode at the first position on the panel for receiving the common electrode signal. 4. The TFT-LCD drive circuit according to claim 3, wherein the second compensation circuit comprises: a second capacitor, a third resistor, a fourth resistor and a second operational amplifier; The two ends of the second capacitor are respectively connected to the second detection module and the third resistor, and the third resistor is respectively connected to the second capacitor and the inverting input terminal of the second operational amplifier, and the fourth The resistors are respectively connected to the inverting input terminal of the second operational amplifier and the output terminal of the second operational amplifier, the non-inverting input terminal of the second operational amplifier is connected to the common electrode signal generation module, and the second The output end of the operational amplifier is connected to the electrode at the second position on the panel for receiving the common electrode signal. 5. The TFT-LCD driving circuit according to claim 4, characterized in that, the first compensation circuit and the second compensation circuit are arranged in the source driver circuit, or the first compensation circuit and the second compensation circuit set in the gate drive circuit. 6. The TFT-LCD driver circuit according to claim 5, wherein the first compensation circuit is arranged in the first source driver sub-circuit of the source driver circuit, and the second compensation circuit is arranged in a second source driver subcircuit of said source driver circuit; or The first compensation circuit is set in a first gate drive sub-circuit of the gate drive circuit, and the second compensation circuit is set in a second gate drive sub-circuit of the gate drive circuit. 7. The TFT-LCD driving circuit according to any one of claims 2-6, wherein the first compensation circuit connects the first fixed point on the flexible circuit board with the first position on the panel The electrode connection for receiving the common electrode signal; The second compensation circuit is connected to an electrode at a second position on the panel for receiving a common electrode signal through a second fixed point on the flexible circuit board.

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