Driving circuit, display panel and display device

Abstract

Embodiments of the present application disclose a driving circuit, a display panel and a display device. The display panel comprises a driving circuit and a common electrode line arranged on a substrate, the common electrode line comprising a first sampling point and a second sampling point, the first sampling point being close to the center of the display panel, and the second sampling point being close to the edge of the display panel; the driving circuit comprises: a compensation circuit comprising a first input end, a second input end and a first output end, the second input end being electrically connected to the first sampling point, and the first output end being electrically connected to the second sampling point; and a power management circuit comprising a second output end, the second output end being electrically connected to the first input end and the first sampling point respectively. The present application can not only realize voltage compensation of the common electrode, but also reduce the disturbance caused by pixel voltage switching, improve the surface noise of the LCD display screen, and further avoid the situation that the surface noise of the LCD display screen is too large to pass the standard test of the touch.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display panel driving, and in particular to a driving circuit, a display panel and a display device. BACKGROUND

[0002] The LCD (Liquid Crystal Display) display screen compatible with touch function is currently widely used in large-scale liquid crystal televisions, liquid crystal splicing screens, small-size smart phones, tablet computers, notebook computers and other electronic product fields.

[0003] In the related art, when the LCD display screen is used in combination with an external touch cover plate, the LCD display screen has a high requirement for electromagnetic interference noise on the surface of the LCD display screen. However, due to the high-frequency switching of the pixel voltage of each frame of the LCD display screen, the voltage of the common electrode is coupled due to the capacitive effect, thereby causing the common electrode voltage level to fluctuate, resulting in that the electromagnetic interference noise on the surface of the LCD display screen cannot pass the standard test of the Touch. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a driving circuit, a display panel and a display device, aiming to solve the technical problem that the electromagnetic interference noise on the surface of the LCD display screen in the prior art cannot meet the standard test.

[0005] To solve the above technical problems, in a first aspect, the present application provides a driving circuit applied to a display panel, wherein the display panel comprises the driving circuit and a common electrode line arranged on a substrate, the common electrode line comprises a first sampling point and a second sampling point, the first sampling point is close to the center of the display panel, and the second sampling point is close to the edge of the display panel.

[0006] The driving circuit comprises:

[0007] a compensation circuit comprising a first input end, a second input end and a first output end, the second input end is electrically connected to the first sampling point, and the first output end is electrically connected to the second sampling point;

[0008] a power management circuit comprising a second output end, the second output end is respectively electrically connected to the first input end and the first sampling point.

[0009] Further, in the driving circuit, the compensation circuit comprises an operational amplifier.

[0010] The non-inverting input of the operational amplifier is electrically connected to the second output to receive a first common voltage; the output of the operational amplifier is electrically connected to the second sampling point to output a second common voltage; and the inverting input of the operational amplifier is electrically connected to the first sampling point to receive a common feedback voltage.

[0011] Furthermore, in the aforementioned driving circuit, the driving circuit also includes an adjustment circuit;

[0012] One end of the adjustment circuit is electrically connected to the second input terminal, and the other end of the adjustment circuit is electrically connected to the first output terminal.

[0013] Furthermore, in the driving circuit, the adjustment circuit includes a first resistor and a second resistor;

[0014] Wherein, one end of the first resistor is electrically connected to the second input terminal and one end of the second resistor, the other end of the first resistor is electrically connected to the first sampling point, and the other end of the second resistor is electrically connected to the first input terminal.

[0015] Furthermore, in the aforementioned driving circuit, the driving circuit also includes a first protection circuit;

[0016] One end of the first protection circuit is electrically connected to the first sampling point, and the other end of the first protection circuit is electrically connected to the second input terminal.

[0017] Furthermore, the driving circuit further includes a filtering circuit.

[0018] One end of the filter circuit is electrically connected to the first sampling point, and the other end of the filter circuit is grounded.

[0019] Furthermore, the driving circuit further includes a second protection circuit.

[0020] One end of the second protection circuit is electrically connected to the first output terminal, and the other end of the second protection circuit is electrically connected to the second sampling point.

[0021] Furthermore, in the driving circuit, the common electrode line includes two first sampling points and two second sampling points;

[0022] Two first sampling points are symmetrically arranged on the display panel, and two second sampling points are symmetrically arranged on the display panel; the first output terminal and the second input terminal are electrically connected to one second sampling point, and the second output terminal is electrically connected to one first sampling point.

[0023] Secondly, this application also provides a display panel that includes the driving circuit described in the first aspect.

[0024] Thirdly, this application also provides a display device that includes the display panel described in the second aspect.

[0025] The driving circuit provided in this application includes a compensation circuit and a power management circuit. The compensation circuit includes a first input terminal, a second input terminal, and a first output terminal. The power management circuit includes a second output terminal. The common electrode line on the substrate of the display panel where the driving circuit is located includes a first sampling point and a second sampling point. The first sampling point is close to the center of the display panel, and the second sampling point is close to the edge of the display panel. This application splits the output of the second output terminal of the power management circuit into two paths. One path is input to the first sampling point near the center of the display panel, and the other path is input to the first input terminal of the compensation circuit. The compensation circuit outputs the compensation voltage through the first output terminal to the second sampling point near the edge of the display panel. At the same time, the feedback voltage of the first sampling point is input to the second input terminal of the compensation circuit. This not only achieves voltage compensation for the common electrode but also reduces the large disturbance caused by pixel voltage switching, improves the surface noise of the LCD display, and avoids the LCD display surface noise being too high, thus failing the Touch standard test. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the existing drive circuit.

[0028] Figure 2 This is a schematic diagram of the driving circuit provided in an embodiment of this application. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] In the description of this application, it should be understood that the terms "one end," "the other end," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, the meaning of "" is two or more, unless otherwise explicitly specified.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a link, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure of this application, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit this application.

[0033] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or settings discussed. In the above embodiments, the descriptions of each embodiment have their own emphasis, and parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0034] Currently, LCD displays with touch functionality, when paired with external touch cover plates, typically employ methods such as... Figure 1 The driving circuit shown includes an operational amplifier OP, resistors R1, R2, R3, and R4, and a power management chip PMIC. The power management chip PMIC is electrically connected to the non-inverting input of the operational amplifier OP and inputs a common voltage V to the non-inverting input of the operational amplifier OP. com2The inverting input of the operational amplifier OP receives the feedback voltage Vcom_fb from the sampling points on the common electrode line, and the output of the operational amplifier OP outputs the compensated common voltage V to all sampling points on the common electrode line (first sampling point A, second sampling point B). com1 .

[0035] However, in the above-mentioned driving circuit design, when the pixel voltage switches, the voltage of the common electrode will still experience large disturbances, resulting in high surface noise on the LCD screen, which in turn makes it unable to pass the standard Touch test.

[0036] To address the technical problem of high surface noise on the LCD screen caused by the aforementioned driving circuit, this application provides a driving circuit, a display panel, and a display device.

[0037] Please see Figure 2 , Figure 2 This is a schematic diagram of the driving circuit provided in an embodiment of this application. Figure 2 As shown, a driving circuit is applied to a display panel. The display panel includes the driving circuit and a common electrode line disposed on a substrate 10. The common electrode line includes a first sampling point A and a second sampling point B. The first sampling point A is close to the center of the display panel, and the second sampling point B is close to the edge of the display panel.

[0038] The driving circuit includes:

[0039] The compensation circuit includes a first input terminal, a second input terminal, and a first output terminal. The second input terminal is electrically connected to the first sampling point A, and the first output terminal is electrically connected to the second sampling point B.

[0040] The power management circuit includes a second output terminal, which is electrically connected to the first input terminal and the first sampling point A.

[0041] Specifically, the driving circuit is located on the driving circuit board of the display panel, and the driving circuit board and the substrate 10 can be connected via a chip-on-film (COF) film. The driving circuit board may include a gate driving circuit, a source driving circuit, etc. A pixel array (not shown in the figure) is disposed on the substrate 10. Each pixel in the pixel array has a liquid crystal unit, and the two poles of the external electric field applied to the liquid crystal unit are the pixel electrode and the common electrode, respectively. The pixel electrodes are connected to scan lines and data lines via TFTs (Thin Film Transistors). The common electrodes corresponding to each liquid crystal unit are interconnected to form a common electrode line. The driving circuit board and the substrate 10 can be connected via the COF film. The gate driving circuit is connected to each scan line to drive the TFTs corresponding to each row of pixels to turn on or off. The source driving circuit is connected to the data line to input data voltage to each pixel. The compensation circuit is connected to the common electrode line for reverse compensation.

[0042] The distribution of common electrode lines varies depending on the driving architecture of the display panel. When the display panel is driven using FFS or IPS display mode, the common electrode lines are all distributed on the array substrate 10. When the display panel is driven using TN or MVA display mode, the common electrode lines are distributed on both the array substrate 10 and the color filter substrate 10. The above distribution of common electrode lines is only an example, and the specific distribution can be set according to requirements.

[0043] In this embodiment, the power management circuit includes a power management chip (PMIC), and the second output terminal of the power management circuit outputs a common voltage V to the first input terminal of the compensation circuit. com2 At the same time, a common voltage V is also output to the substrate 10 through the first sampling point A. com2 The substrate 10 outputs a feedback voltage Vcom_fb to the second input terminal of the compensation circuit through the first sampling point A, and the first output terminal of the compensation circuit outputs a compensated common voltage V to the substrate 10 through the second sampling point B. com1 This can reduce the common voltage fluctuations that occur when the display panel switches pixel voltages, effectively improving the surface noise of the LCD screen. Thus, while maintaining the quality of the picture, it also achieves significant optimization of lateral crosstalk.

[0044] The relative positions of the first sampling point A and the second sampling point B on the display panel are set based on the display panel itself. That is, multiple sampling points are set on the common electrode line in this application, including the first sampling point A and the second sampling point B. The positions of the first sampling point A and the second sampling point B on the display panel are not the same. The first sampling point A is a sampling point near the center of the display panel and is not located at the outermost edge of the display panel; the second sampling point B is a sampling point near the outermost edge of the display panel. That is, apart from the second sampling point B, no other type of sampling point is closer to the outermost edge of the display panel than the second sampling point B.

[0045] The driving circuit provided in this application includes a compensation circuit and a power management circuit. The compensation circuit includes a first input terminal, a second input terminal, and a first output terminal. The power management circuit includes a second output terminal. The common electrode line on the substrate 10 of the display panel where the driving circuit is located includes a first sampling point A and a second sampling point B. The first sampling point A is close to the center of the display panel, and the second sampling point B is close to the edge of the display panel. This application splits the output of the second output terminal of the power management circuit into two paths. One path is input to the first sampling point A near the center of the display panel, and the other path is input to the first input terminal of the compensation circuit. The compensation circuit outputs the compensation voltage to the second sampling point B near the edge of the display panel through the first output terminal. At the same time, the feedback voltage of the first sampling point A is input to the second input terminal of the compensation circuit. This not only achieves voltage compensation for the common electrode but also reduces the large disturbance caused by pixel voltage switching, improves the surface noise of the LCD display, and avoids the LCD display surface noise being too high, thus failing the Touch standard test.

[0046] It should be noted that the first sampling point A mentioned in this application may include multiple sampling points, none of which are located at the outermost edge of the display panel. That is, the position of these multiple sampling points on the display panel relative to the second sampling point B is not at the outermost edge of the display panel.

[0047] Meanwhile, the second sampling point B mentioned in this application may also include multiple sampling points, each of which is located at the outermost edge of the display panel. That is, relative to the first sampling point A, the positions of these multiple sampling points are located at the outermost edge of the display panel.

[0048] It is understood that the first sampling point A and the second sampling point B referred to in this application do not simply represent a single point on the common electrode line, but can represent multiple sampling points. They can be selected according to the actual application, and this application does not make any specific limitations.

[0049] In other words, the second output of the power management circuit inputs a common voltage V to the substrate 10. com2At that time, the common voltage V can be input through at least one of the sampling points in the first sampling point A. com2 The first output terminal of the compensation circuit inputs the compensated common voltage V to the substrate 10. com1 At that time, the compensated common voltage V can be output through at least one of the sampling points in the second sampling point B. com1 When the substrate 10 inputs a feedback voltage Vcom_fb to the second input terminal of the compensation circuit, it can input the feedback voltage Vcom_fb to the second input terminal of the compensation circuit through at least one of the first sampling points A.

[0050] In a preferred embodiment, such as Figure 2 As shown, the common electrode line includes two first sampling points A and two second sampling points B; wherein, the two first sampling points A are symmetrically arranged on the display panel, and the two second sampling points B are symmetrically arranged on the display panel; the first output terminal and the second input terminal are electrically connected to one second sampling point B, and the second output terminal is electrically connected to one first sampling point A.

[0051] In this embodiment, two first sampling points A are symmetrically arranged on the display panel along the central axis of the display panel, and similarly, two second sampling points B are symmetrically arranged on the display panel along the central axis of the display panel. The second output terminal of the power management circuit inputs a common voltage V to the substrate 10. com2 At that time, a common voltage V is input to the substrate 10 through all the first sampling points A in the display panel. com2 The first output terminal of the compensation circuit inputs the compensated common voltage V to the substrate 10. com1 At that time, the compensated common voltage V is output only through the second sampling point B on one side of the display panel. com1 When the substrate 10 inputs the feedback voltage Vcom_fb to the second input terminal of the compensation circuit, it only inputs the feedback voltage Vcom_fb to the second input terminal of the compensation circuit through the first sampling point A on the side of the display panel.

[0052] In some embodiments, the driving circuit further includes an adjustment circuit; wherein one end of the adjustment circuit is electrically connected to the second input terminal, and the other end of the adjustment circuit is electrically connected to the first output terminal.

[0053] Specifically, in liquid crystal displays (LCDs), thin-film transistors (TFTs) all exhibit a certain degree of leakage current, and capacitive effects exist between TFTs. The voltages between adjacent data lines are affected by capacitance, causing mutual interference and resulting in crosstalk. Generally, crosstalk is mitigated by adjusting the common voltage of the liquid crystal molecules to improve the display effect of the LCD panel. This application embodiment can adjust the crosstalk based on the obtained compensation coefficient, feedback voltage Vcom_fb, and common voltage V... com2 The comparison result outputs the compensated common voltage V. com1 .

[0054] Furthermore, in some embodiments, such as Figure 2 As shown, the compensation circuit includes an operational amplifier OP; wherein, the non-inverting input terminal of the operational amplifier OP is electrically connected to the second output terminal to access a first common voltage; the output terminal of the operational amplifier OP is electrically connected to the second sampling point B to output a second common voltage; the inverting input terminal of the operational amplifier OP is electrically connected to the first sampling point A to access a common feedback voltage; the adjustment circuit includes a first resistor R1 and a second resistor R2; wherein, one end of the first resistor R1 is electrically connected to the second input terminal and one end of the second resistor R2, the other end of the first resistor R1 is electrically connected to the first sampling point A, and the other end of the second resistor R2 is electrically connected to the first input terminal.

[0055] In this embodiment, the adjustment circuit is also used to receive an adjustment signal during the display panel debugging stage, and adjust the resistance value of the adjustable rheostat according to the adjustment signal to adjust the compensation coefficient. The compensation coefficient is the ratio of the resistance values ​​of the second resistor R2 to the first resistor R1, where compensation coefficient = R2 / R1. The second resistor R2 can be an adjustable rheostat, including a sliding rheostat. Correspondingly, the adjustment signal includes the resistance value information of the adjustable rheostat.

[0056] Meanwhile, the image quality of each display panel can be obtained for different display panels, and different adjustment signals can be obtained according to different image quality (i.e., crosstalk level, or brightness difference at different positions). This allows the adjustment circuit to adjust the resistance value of the second resistor R2 according to the corresponding adjustment signal, so that the corresponding compensation circuit can obtain a better compensation coefficient to achieve compensation for the common voltage, and finally enable each display panel to obtain a better compensation effect to eliminate crosstalk.

[0057] In some embodiments, the driving circuit further includes a first protection circuit; wherein one end of the first protection circuit is electrically connected to the first sampling point A, and the other end of the first protection circuit is electrically connected to the second input terminal.

[0058] In this embodiment, by setting a first protection circuit between the second sampling point B and the second input terminal, the loop current can be effectively limited, noise can be suppressed, and the EMC problem can be well solved.

[0059] Furthermore, in one specific embodiment, such as Figure 2 As shown, the first protection circuit includes a resistor R3. One end of the resistor R3 is electrically connected to the second sampling point B, and the other end of the resistor R3 is electrically connected to the second input terminal through the first resistor R1.

[0060] In some embodiments, the driving circuit further includes a filtering circuit; wherein one end of the filtering circuit is electrically connected to the first sampling point A, and the other end of the filtering circuit is grounded.

[0061] In this embodiment, by setting a filter circuit between the power management circuit and the first sampling point A, the common voltage fluctuation that occurs when the display panel switches pixel voltages can be further reduced.

[0062] Furthermore, in one specific embodiment, such as Figure 2 As shown, the filter circuit includes capacitor C1. One end of capacitor C1 is electrically connected to the first sampling point A and the second output terminal of the power management circuit, respectively, and the other end of capacitor C1 is grounded.

[0063] In some embodiments, the driving circuit further includes a second protection circuit; wherein one end of the second protection circuit is electrically connected to the first output terminal, and the other end of the second protection circuit is electrically connected to the second sampling point B.

[0064] Specifically, the second protection circuit may include, for example: Figure 2 The resistor R4 shown has one end electrically connected to resistor R2 and the output terminal of operational amplifier OP, and the other end electrically connected to the second sampling point B. This can further effectively limit the loop current, suppress noise, and effectively solve the EMC problem.

[0065] In addition, the compensation circuit of this application outputs a compensated common voltage V. com1 The basic principle is as follows: The first sampling point A within the display panel receives the common voltage V it collects. com2 Then, the feedback voltage Vcom_fb is connected to the inverting input of the operational amplifier OP through the first protection circuit, and the common voltage V is input to the non-inverting input of the operational amplifier OP. com2 The operational amplifier OP outputs a compensated common voltage V. com1By sequentially passing the second protection circuit and the second sampling point B into the display panel, the common voltage fluctuation that occurs when the display panel switches pixel voltages can be reduced, thus effectively improving the surface noise of the LCD screen. This achieves significant optimization of lateral crosstalk while maintaining the quality of the picture.

[0066] In some embodiments, this application also provides a display panel that includes the driving circuit described in the above embodiments.

[0067] Specifically, the display panel in this application embodiment can be used in mobile phones, tablets, desktop computers, laptops, e-readers, handheld computers, electronic display screens, laptops, ultra-mobile personal computers (UMPCs), netbooks, as well as cellular phones, personal digital assistants (PDAs), augmented reality (AR) / virtual reality (VR) devices, media players, wearable devices, digital cameras, car navigation systems, etc.

[0068] Preferably, the display panel provided in this embodiment is a laptop display panel.

[0069] In addition, the display panel can be a liquid crystal display panel. This application does not limit the type of liquid crystal display panel. The liquid crystal display panel provided in this application can be a horizontal electric field type liquid crystal display panel, such as a fringe field switching (FFS) type liquid crystal display panel or an in-plane switching (IPS) type liquid crystal display panel, or a vertical electric field type liquid crystal display panel, such as a twisted nematic (TN) type liquid crystal display panel or a multi-domain vertical alignment (MVA) type liquid crystal display panel.

[0070] In some embodiments, this application also provides a display device, which includes the display panel in the above embodiments.

[0071] The display device includes a liquid crystal display (LCD) device, which comprises a liquid crystal display panel and a driving circuit. The liquid crystal display panel includes multiple scan lines and multiple data lines, with adjacent scan lines and adjacent data lines intersecting to form a pixel unit. The driving circuit includes a gate drive circuit and a source drive circuit. Taking a thin-film transistor (TFT) liquid crystal display device as an example, each pixel unit includes at least one TFT.

[0072] The basic working principle of a liquid crystal display panel and its driving circuit is as follows: The gate driving circuit sends a gate driving signal to the scan line through a pull-up transistor electrically connected to the scan line, sequentially turning on the TFTs of each row. Then, the data signal sent by the source driving circuit to the data line simultaneously charges all the pixel units in an entire row to their required voltage, thus displaying different grayscale levels. Specifically, the gate driving circuit of the first row first turns on the thin-film transistors of the first row through its pull-up transistor, and then the source driving circuit charges the pixel units of the first row. When the pixel units of the first row are fully charged, the gate driving circuit turns off the thin-film transistors of that row. Then, the gate driving circuit of the second row turns on the thin-film transistors of the second row through its pull-up transistor, and the source driving circuit charges and discharges the pixel units of the second row. This process continues until the pixel units of the last row are fully charged, then charging starts again from the first row. This controls the display panel to maintain a preset brightness while refreshing the image at the corresponding refresh rate.

[0073] Typically, the luminance of each pixel can be defined by "grayscale". Grayscale refers to dividing the luminance of a pixel from its brightest to its darkest point into several levels, with each grayscale representing a brightness level. Generally, each pixel in a display panel has a total of 256 grayscale levels, from 0 to 255.

[0074] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0075] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A driving circuit, characterized in that, The method is applied to a display panel, the display panel including the driving circuit and a common electrode line disposed on a substrate, the common electrode line including a first sampling point and a second sampling point, the first sampling point being close to the center of the display panel, the second sampling point being close to the edge of the display panel, the first sampling point including multiple sampling points, the positions of the multiple sampling points included in the first sampling point on the display panel are not at the outermost edge of the display panel relative to the second sampling point, the second sampling point including multiple sampling points, the multiple sampling points included in the second sampling point being all at the outermost edge of the display panel relative to the first sampling point; The driving circuit includes: The compensation circuit includes a first input terminal, a second input terminal, and a first output terminal. The second input terminal is electrically connected to the first sampling point, and the first output terminal is electrically connected to the second sampling point. The power management circuit includes a second output terminal, which is electrically connected to the first input terminal and the first sampling point, respectively.

2. The driving circuit according to claim 1, characterized in that, The compensation circuit includes an operational amplifier; The non-inverting input of the operational amplifier is electrically connected to the second output to receive a first common voltage; the output of the operational amplifier is electrically connected to the second sampling point to output a second common voltage; and the inverting input of the operational amplifier is electrically connected to the first sampling point to receive a common feedback voltage.

3. The driving circuit according to claim 1, characterized in that, The drive circuit also includes an adjustment circuit; One end of the adjustment circuit is electrically connected to the second input terminal, and the other end of the adjustment circuit is electrically connected to the first output terminal.

4. The driving circuit according to claim 3, characterized in that, The adjustment circuit includes a first resistor and a second resistor; Wherein, one end of the first resistor is electrically connected to the second input terminal and one end of the second resistor, the other end of the first resistor is electrically connected to the first sampling point, and the other end of the second resistor is electrically connected to the first input terminal.

5. The driving circuit according to claim 1, characterized in that, The driving circuit also includes a first protection circuit; One end of the first protection circuit is electrically connected to the first sampling point, and the other end of the first protection circuit is electrically connected to the second input terminal.

6. The driving circuit according to claim 1, characterized in that, The driving circuit also includes a filtering circuit; One end of the filter circuit is electrically connected to the first sampling point, and the other end of the filter circuit is grounded.

7. The driving circuit according to claim 1, characterized in that, The driving circuit also includes a second protection circuit; One end of the second protection circuit is electrically connected to the first output terminal, and the other end of the second protection circuit is electrically connected to the second sampling point.

8. The driving circuit according to claim 1, characterized in that, The common electrode line includes two first sampling points and two second sampling points; Two first sampling points are symmetrically arranged on the display panel, and two second sampling points are symmetrically arranged on the display panel; the first output terminal and the second input terminal are electrically connected to one second sampling point, and the second output terminal is electrically connected to one first sampling point.

9. A display panel, characterized in that, The driving circuit includes any one of claims 1-8.

10. A display device, characterized in that, Includes the display panel as described in claim 9.

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