CN117612498A

CN117612498A - Driving circuit, display panel and display device

Info

Publication number: CN117612498A
Application number: CN202311827824.1A
Authority: CN
Inventors: 杨东旭; 廖木山; 王教建; 韩韶川
Original assignee: Guangzhou China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Guangzhou China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2023-12-27
Filing date: 2023-12-27
Publication date: 2024-02-27

Abstract

The embodiment of the application discloses a driving circuit, a display panel and a display device. The display panel comprises a driving circuit and a public electrode wire arranged on the substrate, the public electrode wire 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; the driving circuit includes: the compensation circuit comprises a first input end, a second input end and a first output end, wherein the second input end is electrically connected with a first sampling point, and the first output end is electrically connected with a second sampling point; the power management circuit comprises a second output end, and the second output end is respectively and electrically connected with the first input end and the first sampling point. The method and the device can realize voltage compensation on the common electrode, simultaneously reduce larger disturbance generated by switching pixel voltage, improve the surface noise of the LCD, and further avoid that the surface noise of the LCD is too large to pass through the Touch standard test.

Description

Driving circuit, display panel and display device

Technical Field

The present disclosure relates to the field of driving technologies for display panels, and in particular, to a driving circuit, a display panel, and a display device.

Background

The LCD (Liquid Crystal Display) display screen compatible with the touch function is widely applied to the field of electronic products such as large-scale liquid crystal televisions, liquid crystal spliced screens, small-size smart phones, tablet computers and notebooks.

In the related art, when an LCD display screen is matched with a plug-in touch cover plate, the requirement of electromagnetic interference noise on the surface of the LCD display screen is high. However, since the pixel voltage of each frame of picture of the LCD display screen needs to be switched at high frequency, the voltage of the common electrode is coupled due to the capacitance effect, so that the voltage level of the common electrode fluctuates, and the electromagnetic interference noise on the surface of the LCD display screen cannot pass the Touch standard test.

Disclosure of Invention

Aiming at the defects of the prior art, the application provides a driving circuit, a display panel and a display device, and aims to solve the technical problem that electromagnetic interference noise on the surface of an LCD display screen in the prior art cannot reach standard test.

In order to solve the technical problem, in a first aspect, the present application provides a driving circuit, which is applied to a display panel, wherein the display panel includes the driving circuit and a common electrode line disposed on a substrate, the common electrode line 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;

the driving circuit includes:

the compensation circuit comprises a first input end, a second input end and a first output end, wherein the second input end is electrically connected with the first sampling point, and the first output end is electrically connected with the second sampling point;

the power management circuit comprises a second output end, and the second output end is respectively and electrically connected with the first input end and the first sampling point.

Further, in the driving circuit, the compensation circuit includes an operational amplifier;

the non-inverting input end of the operational amplifier is electrically connected with the second output end so as to be connected with a first public voltage; the output end of the operational amplifier is electrically connected with the second sampling point so as to output a second common voltage; and the reverse input end of the operational amplifier is electrically connected with the first sampling point so as to be connected with a common feedback voltage.

Further, in the driving circuit, the driving circuit further includes an adjusting circuit;

one end of the adjusting circuit is electrically connected with the second input end, and the other end of the adjusting circuit is electrically connected with the first output end.

Further, in the driving circuit, the adjusting circuit includes a first resistor and a second resistor;

one end of the first resistor is electrically connected with the second input end and one end of the second resistor respectively, the other end of the first resistor is electrically connected with the first sampling point, and the other end of the second resistor is electrically connected with the first input end.

Further, in the driving circuit, the driving circuit further includes a first protection circuit;

one end of the first protection circuit is electrically connected with the first sampling point, and the other end of the first protection circuit is electrically connected with the second input end.

Further, in the driving circuit, the driving circuit further includes a filter circuit;

one end of the filter circuit is electrically connected with the first sampling point, and the other end of the filter circuit is grounded.

Further, in the driving circuit, the driving circuit further includes a second protection circuit;

one end of the second protection circuit is electrically connected with the first output end, and the other end of the second protection circuit is electrically connected with the second sampling point.

Further, in the driving circuit, the common electrode line includes two of the first sampling points and two of the second sampling points;

the two first sampling points are symmetrically arranged on the display panel, and the two second sampling points are symmetrically arranged on the display panel; the first output end and the second input end are electrically connected with one second sampling point, and the second output end is electrically connected with one first sampling point.

In a second aspect, the present application further provides a display panel, which includes the driving circuit of the first aspect.

In a third aspect, the present application further provides a display device, which includes the display panel according to the second aspect.

The application provides a drive circuit, it includes compensation circuit and power management circuit, and compensation circuit includes first input, second input and first output, and power management circuit includes the second output, and the public electrode line on the base plate of the display panel of drive circuit place includes first sampling point and second sampling point, and first sampling point is close to display panel central authorities, and the second sampling point is close to the display panel edge. The output of this application at the second output end through power management circuit divides into two ways, in the first sampling point that is close to display panel central authorities is input to one way, another way is input to the first input of compensating circuit, and in the compensating circuit passes through the first output end with the compensation voltage of output to the second sampling point that is close to display panel edge, the feedback voltage of first sampling point inputs to compensating circuit's second input simultaneously, and then not only can realize carrying out voltage compensation to the public electrode, pixel voltage switching has still been reduced simultaneously and has produced great disturbance, LCD display screen surface noise has been improved, and then LCD display screen surface noise has been avoided too big and unable through Touch's standard test.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a conventional driving circuit;

fig. 2 is a schematic structural diagram of a driving circuit according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "one end," "the other end," and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description of the present application and to simplify the description, rather than to indicate or imply that the apparatus or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "" "is two or more, unless explicitly defined otherwise.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the term "connected" shall be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically connected, can be connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application.

Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

At present, when an LCD display screen compatible with touch function is matched with an externally hung touch cover plate, a driving circuit shown in fig. 1 is generally adopted, and the driving circuit comprises an operational amplifier OP, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a power management chip PMIC, wherein the power management chip PMIC is electrically connected with the non-inverting input end of the operational amplifier OP and inputs a common voltage V to the non-inverting input end of the operational amplifier OP _com2 The method comprises the steps of carrying out a first treatment on the surface of the The inverting input terminal of the operational amplifier OP receives the feedback voltage Vcom_fb of the sampling point on the common electrode line, and the output terminal of the operational amplifier OP outputs the compensated common voltage V to all the sampling points (the first sampling point A and the second sampling point B) on the common electrode line _com1 。

However, in the above-mentioned design of the driving circuit, when the pixel voltage is switched, the voltage of the common electrode will still generate a larger disturbance, which results in a larger noise on the surface of the LCD display screen, and thus the LCD display screen cannot pass the Touch standard test.

In order to solve the technical problem of large surface noise of the LCD display screen caused by the driving circuit, the application provides the driving circuit, the display panel and the display device.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a driving circuit according to an embodiment of the present application. As shown in fig. 2, a driving circuit is applied to a display panel, the display panel comprises the driving circuit and a common electrode line arranged on a substrate 10, the common electrode line comprises 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;

the driving circuit includes:

the compensation circuit comprises a first input end, a second input end and a first output end, wherein the second input end is electrically connected with the first sampling point A, and the first output end is electrically connected with the second sampling point B;

the power management circuit comprises a second output end, and the second output end is respectively and electrically connected with the first input end and the first sampling point A.

Specifically, the driving circuit is disposed On a driving circuit board of the display panel, and the driving circuit board and the substrate 10 may be connected through a Chip On Film (COF). The driving circuit board may include a gate driving circuit, a source driving circuit, and the like. A pixel array (not shown) is disposed on the substrate 10, and each pixel in the pixel array has a liquid crystal unit, and two electrodes of an applied electric field of the liquid crystal unit are a pixel electrode and a common electrode, respectively. The pixel electrode is connected to a scanning line and a data line through a TFT (Thin Film Transistor ). The common electrodes corresponding to the liquid crystal cells are connected with each other to form a common electrode line. The driving circuit board and the substrate 10 can be connected through a flip-chip film, the gate driving circuit is connected with each scanning line for driving the on or off of the TFT corresponding to each row of pixels, the source driving circuit is connected with the data line for inputting data voltage to each pixel, and the compensation circuit is connected with the common electrode line for reverse compensation.

The driving architectures of the display panels are different in distribution of different common electrode lines, and when the display panels are driven by adopting an FFS or IPS display mode, the common electrode lines are all distributed on the array substrate 10. When the display panel is driven by adopting a TN or MVA display mode, the common electrode lines are distributed on the array substrate 10 and the color film substrate 10. The distribution of the common electrode lines is only an example, and a specific distribution manner thereof may be set according to requirements.

In this embodiment, the power management circuit includes a power management chip PMIC, and a power management circuitA second output terminal of the compensation circuit outputs a common voltage V to a first input terminal of the compensation circuit _com2 At the same time, the common voltage V is also output to the substrate 10 through the first sampling point A _com2 The substrate 10 outputs the 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 the compensated common voltage V to the substrate 10 through the second sampling point B _com1 And further, the common voltage fluctuation of the display panel during pixel voltage switching can be weakened, so that the surface noise of the LCD display screen is effectively improved, and the horizontal crosstalk is obviously optimized while the picture taste is considered.

The relative positions of the first sampling point A and the second sampling point B in the display panel are set based on the display panel. That is, the common electrode line in the present application is provided with a plurality of sampling points, including a first sampling point a and a second sampling point B, where the positions of the first sampling point a and the second sampling point B on the display panel are different, and the first sampling point a is a sampling point near the center of the display panel and is not located at the extreme edge of the display panel; the second sampling point B belongs to the sampling point near the extreme edge of the display panel, i.e. no other type of sampling point than the second sampling point B is closer to the extreme edge of the display panel than the second sampling point B.

The application provides a drive circuit, it includes compensation circuit and power management circuit, and compensation circuit includes first input, second input and first output, and power management circuit includes the second output, and the public electrode line on the base plate 10 of the display panel of drive circuit place includes first sampling point A and second sampling point B, and first sampling point A is close to display panel central authorities, and second sampling point B is close to the display panel edge. The output of the power management circuit at the second output end is divided into two paths, one path of the output is input into the first sampling point A close to the center of the display panel, the other path of the output is input into the first input end of the compensation circuit, the compensation circuit outputs the compensation voltage to the second sampling point B close to the edge of the display panel through the first output end, meanwhile, the feedback voltage of the first sampling point A is input into the second input end of the compensation circuit, voltage compensation on the common electrode can be achieved, meanwhile, the pixel voltage switching is reduced to generate larger disturbance, the surface noise of the LCD display screen is improved, and further the phenomenon that the surface noise of the LCD display screen is overlarge and cannot pass through the Touch standard test is avoided.

It should be noted that, the first sampling point a mentioned in the present application may include a plurality of sampling points, and none of the plurality of sampling points is located at the edge of the display panel. That is, the plurality of sampling points are located on the display panel at positions other than the extreme edge of the display panel with respect to the second sampling point B.

Meanwhile, the second sampling point B mentioned in the present application may also include a plurality of sampling points, each of which is at the extreme edge of the display panel. That is, the positions of the plurality of sampling points are at the extreme edge of the display panel with respect to the first sampling point a.

It should be understood that the first sampling point a and the second sampling point B referred to in the present application are not merely representative of a single point on the common electrode line, and may represent a plurality of sampling points, which may be selected according to practical applications, and the present application is not limited specifically.

In other words, the second output terminal of the power management circuit inputs the common voltage V to the substrate 10 _com2 At this time, the common voltage V may be input through at least one of the first sampling points a _com2 The method comprises the steps of carrying out a first treatment on the surface of the A first output terminal of the compensation circuit inputs the compensated common voltage V to the substrate 10 _com1 At this time, the compensated common voltage V may be outputted through at least one sampling point of the second sampling points B _com1 The method comprises the steps of carrying out a first treatment on the surface of the When the feedback voltage vcom_fb is input to the second input terminal of the compensation circuit, the substrate 10 may 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.

In a preferred embodiment, as shown in fig. 2, the common electrode line includes two of the first sampling points a and two of the second sampling points B; 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 end and the second input end are electrically connected with one second sampling point B, and the second output end is electrically connected with one first sampling point A.

In this embodiment, the two first sampling points a are symmetrically disposed on the display panel according to the central axis of the display panel, and similarly, the two second sampling points B are symmetrically disposed on the display panel according to the central axis of the display panel. A second output terminal of the power management circuit inputs a common voltage V to the substrate 10 _com2 At this time, the common voltage V is input to the substrate 10 through all the first sampling points a in the display panel _com2 The method comprises the steps of carrying out a first treatment on the surface of the A first output terminal of the compensation circuit inputs the compensated common voltage V to the substrate 10 _com1 At this time, the compensated common voltage V is outputted only through the second sampling point B on one side of the display panel _com1 The method comprises the steps of carrying out a first treatment on the surface of the When the feedback voltage vcom_fb is input to the second input terminal of the compensation circuit, the substrate 10 inputs the feedback voltage vcom_fb to the second input terminal of the compensation circuit only through the first sampling point a on the display panel side.

In some embodiments, the drive circuit further comprises an adjustment circuit; one end of the adjusting circuit is electrically connected with the second input end, and the other end of the adjusting circuit is electrically connected with the first output end.

Specifically, in a liquid crystal display, since a certain degree of leakage exists in the thin film transistor, a capacitance effect exists between the TFTs, and voltages between adjacent data lines are affected by the capacitance and affect each other, so that a crosstalk phenomenon is formed, and the crosstalk phenomenon is generally improved by adjusting a common voltage for deflecting liquid crystal molecules, so as to adjust a display effect of the liquid crystal panel. The embodiment of the application can obtain the compensation coefficient and the feedback voltage Vcom_fb and the common voltage V _com2 Outputs the compensated common voltage V _com1 。

Further, in some embodiments, as shown in fig. 2, the compensation circuit includes an operational amplifier OP; the non-inverting input end of the operational amplifier OP is electrically connected with the second output end so as to be connected with a first public voltage; the output end of the operational amplifier OP is electrically connected with the second sampling point B so as to output a second common voltage; the reverse input end of the operational amplifier OP is electrically connected with the first sampling point A so as to be connected with a common feedback voltage; the regulating circuit comprises a first resistor R1 and a second resistor R2; one end of the first resistor R1 is electrically connected to the second input end 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 end.

In this embodiment, the adjusting circuit is further configured to access an adjusting signal in a display panel debugging stage, and adjust a resistance value of the adjustable varistor according to the adjusting signal to adjust the compensation coefficient. The compensation coefficient is the resistance ratio of the second resistor R2 to the first resistor R1, the compensation coefficient=r2/R1, the second resistor R2 may be an adjustable varistor, the adjustable varistor includes a sliding varistor, and the corresponding adjusting signal includes resistance information of the adjustable varistor.

Meanwhile, the picture quality of each display panel can be obtained for different display panels, and different adjusting signals are obtained according to different picture qualities (namely crosstalk degrees or brightness differences at different positions), so that the adjusting circuit can adjust the resistance value of the second resistor R2 according to the corresponding adjusting signals, and accordingly the corresponding compensating circuit obtains a better compensating coefficient to realize the compensation of the public voltage, and finally each display panel obtains a better compensating effect to eliminate crosstalk.

In some embodiments, the drive circuit further comprises a first protection circuit; one end of the first protection circuit is electrically connected with the first sampling point A, and the other end of the first protection circuit is electrically connected with the second input end.

In this embodiment, the first protection circuit is disposed between the second sampling point B and the second input end, so that the loop current can be effectively limited, noise is suppressed, and the EMC problem can be well solved.

Further, in one embodiment, as shown in fig. 2, 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.

In some embodiments, the drive circuit further comprises a filter circuit; one end of the filter circuit is electrically connected with the first sampling point A, and the other end of the filter circuit is grounded.

In this embodiment, by providing a filter circuit between the power management circuit and the first sampling point a, the common voltage fluctuation of the display panel during switching of the pixel voltage can be further reduced.

Further, in a specific embodiment, as shown in fig. 2, the filter circuit includes a capacitor C1, one end of the capacitor C1 is electrically connected to the first sampling point a and the second output end of the power management circuit, and the other end of the capacitor C1 is grounded.

In some embodiments, the drive circuit further comprises a second protection circuit; one end of the second protection circuit is electrically connected with the first output end, and the other end of the second protection circuit is electrically connected with the second sampling point B.

Specifically, the second protection circuit may include a resistor R4 as shown in fig. 2, where one end of the resistor R4 is electrically connected to the resistor R2 and the output end of the operational amplifier OP, and the other end of the resistor R4 is electrically connected to the second sampling point B, so that loop current can be further effectively limited, noise is suppressed, and EMC problem can be well solved.

In addition, the compensation circuit outputs the compensated common voltage V _com1 The basic principle of (a) is as follows: a first sampling point A in the display panel receives the collected public voltage V _com2 After that, the feedback voltage Vcom_fb is connected to the inverting input terminal of the operational amplifier OP through the first protection circuit, and the common voltage V is input to the non-inverting input terminal of the operational amplifier OP _com2 The output end of the operational amplifier OP outputs the compensated common voltage V _com1 The common voltage fluctuation of the display panel during pixel voltage switching can be weakened by sequentially inputting the second protective circuit and the second sampling point B into the display panel, so that the surface noise of the LCD display screen is effectively improvedTherefore, the transverse crosstalk is obviously optimized while considering the picture taste.

In some embodiments, the present application further provides a display panel including the driving circuit in the above embodiments.

Specifically, the display panel in the embodiments of the present application may be used for mobile phones, tablet computers, desktop computers, laptop computers, electronic readers, handheld computers, electronic display screens, notebook computers, ultra-mobile personal computers (Ultra-mobile Personal Computer, UMPC), netbooks, cellular phones, personal digital assistants (Personal Digital Assistant, PDA), augmented Reality (Augmented Reality, AR) \virtual Reality (VR) devices, media players, wearable devices, digital cameras, car navigation devices, and the like.

Preferably, the display panel provided in the embodiment of the present application is a notebook display panel.

In addition, the display panel may be a liquid crystal display panel. The present application is not limited to the type of liquid crystal display panel. The liquid crystal display panel provided by the application can be a horizontal electric field type liquid crystal display panel, such as a fringe field Switching (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, a Multi-domain vertical alignment (Multi-domain Vertical Alignment, MVA) type liquid crystal display panel.

In some embodiments, the present application further provides a display device including the display panel in the above embodiments.

Wherein the display device includes a liquid crystal display device including: the liquid crystal display comprises a liquid crystal display panel and a driving circuit, wherein the liquid crystal display panel comprises a plurality of scanning lines and a plurality of data lines, and two adjacent scanning lines and two adjacent data lines are crossed to form a pixel unit. The drive circuit includes a gate drive circuit (gatedrive circuit) and a source drive circuit (source drive circuit). Taking a thin film transistor (Thin Film Transistor, TFT) liquid crystal display device as an example, each pixel unit includes at least one TFT.

The basic working principle of the liquid crystal display panel and the driving circuit is as follows: the grid driving circuit sends a grid driving signal to the scanning lines through a pull-up transistor electrically connected with the scanning lines, TFTs of each row are sequentially turned on, and then the source driving circuit simultaneously charges pixel units of an entire row to respective required voltages for displaying different gray scales according to the data signals sent by the data lines. That is, the thin film transistors of the first row are turned on by the gate driving circuit of the first row through the pull-up transistors thereof, and then the pixel cells of the first row are charged by the source driving circuit. When the pixel units of the first row are charged, the grid driving circuit turns off the thin film transistors of the first row, then the grid driving circuit of the second row turns on the thin film transistors of the second row through the pull-up transistors of the grid driving circuit, and then the source driving circuit charges and discharges the pixel units of the second row. In this order, when the pixel cells of the last row are filled, the charge is again started from the first row. Thus, when the display panel is controlled to refresh the picture at the corresponding refresh frequency, the picture display is kept at the preset brightness.

In general, for each pixel unit, its light emission luminance can be defined by "gray scale". The gray scale refers to dividing the brightness of the pixel unit from brightest to darkest into several levels, and each gray scale represents one brightness level. In general, each pixel unit in a display panel has a total of 256 gray levels from 0 gray level to 255 gray levels.

In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The driving circuit is characterized by being applied to a display panel, wherein the display panel comprises the driving circuit and a common electrode wire arranged on a substrate, the common electrode wire 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;

the driving circuit includes:

2. The drive circuit of claim 1, wherein the compensation circuit comprises an operational amplifier;

3. The drive circuit of claim 1, wherein the drive circuit further comprises an adjustment circuit;

4. A driving circuit according to claim 3, wherein the regulating circuit comprises a first resistor and a second resistor;

5. The driver circuit of claim 1, wherein the driver circuit further comprises a first protection circuit;

6. The drive circuit of claim 1, wherein the drive circuit further comprises a filter circuit;

7. The drive circuit of claim 1, wherein the drive circuit further comprises a second protection circuit;

8. The drive circuit according to claim 1, wherein the common electrode line includes two of the first sampling points and two of the second sampling points;

9. A display panel comprising the drive circuit of any one of claims 1-8.

10. A display device comprising the display panel of claim 9.