Display panel, display device and compensation method

Abstract

This application discloses a display panel, a display device, and a compensation method. The display panel is divided into a central area and a peripheral area located on the side of the central area. The display panel includes a display module and a compensation module. The display module includes a first common electrode and a second common electrode coupled thereto. The compensation module is connected to a reference voltage terminal, the first common electrode, and the second common electrode located in the central area. The compensation module is used to generate a compensation voltage based on the voltage of the first common electrode and the reference voltage of the reference voltage terminal to compensate the second common electrode. In this way, by sampling the first common electrode through the compensation module and compensating the second common electrode located in the central area, the first common electrode is also compensated under the coupling of the second common electrode. At the same time, due to the effect of in-plane impedance, compensation only in the central area can achieve uniform compensation of the display panel, effectively improving the display effect of the display panel.

Description

Technical Field

[0001] This application relates to display technology, and in particular to a display panel, display device, and compensation method. Background Technology

[0002] Typically, the voltage of the common electrode (VCOM) in a liquid crystal display panel is prone to disturbances (crosstalk) when the data lines and gate lines are coupled to the common electrode. If the disturbed VCOM voltage cannot recover quickly, the display screen of the liquid crystal display panel will be abnormal. For some liquid crystal display products that tend to be large-screen and have high refresh rates (>100Hz), the degree of crosstalk is aggravated.

[0003] In related technologies, VCOM can be compensated to restore the VCOM voltage to a stable value after the drive is disturbed. However, for liquid crystal display products using Vertical Alignment (VA) pixel display technology, there are array substrate (TFT VCOM and CF VCOM), and both need to be improved simultaneously. Simply increasing the number of compensations will not only cause compensation conflicts between TFT and CF, but also the increased number of traces will inevitably lead to increased trace delay (increased line resistance), causing compensation failure. At the same time, the required VCOM compensation multiples for different areas within the plane also differ, resulting in uneven compensation. Summary of the Invention

[0004] This application provides a display panel, a display device, and a compensation method.

[0005] The display panel of this application embodiment is divided into a central area and a peripheral area located on the side of the central area. The display panel includes a display module and a compensation module. The display module includes a first common electrode and a second common electrode. The first common electrode is coupled to the second common electrode. The compensation module is connected to a reference voltage terminal, the first common electrode and the second common electrode located in the central area. The compensation module is used to generate a compensation voltage based on the voltage of the first common electrode and the reference voltage of the reference voltage terminal to compensate the second common electrode.

[0006] In some embodiments, the display panel further includes a connection area, a display area, and an auxiliary area, the connection area and the auxiliary area being located on opposite sides of the display area, and the second common electrode including a compensation point connected to the compensation module, the compensation point being located in the auxiliary area.

[0007] In some embodiments, the second common electrode includes multiple compensation points, which are symmetrically distributed on both sides of the center line of the central region. The compensation module includes multiple compensation modules, and each compensation module is connected to one compensation point.

[0008] In some embodiments, the display module includes an array substrate, a liquid crystal layer, and a color filter substrate, wherein the liquid crystal layer is located between the array substrate and the color filter substrate, the first common electrode is located on the array substrate, and the second common electrode is located on the color filter substrate.

[0009] In some embodiments, the display module includes an array substrate, a liquid crystal layer, and a color filter substrate. The liquid crystal layer is located between the array substrate and the color filter substrate, and the display module is located on the liquid crystal layer. A first common electrode is electrically connected to the color filter substrate, and a second common electrode is electrically connected to the array substrate.

[0010] In some embodiments, the display panel further includes a backlight layer located on the side of the array substrate opposite to the liquid crystal layer, and the compensation module is located on the backlight layer.

[0011] In some implementations, the compensation module includes:

[0012] A first resistor, one end of which is connected to the first common electrode;

[0013] The comparator amplifier includes a first input terminal, a second input terminal, and an output terminal. The first input terminal is connected to the reference voltage terminal, the second input terminal is connected to the other end of the first resistor, and the output terminal is connected to the second common electrode.

[0014] The second resistor has one end connected to the second input terminal and the other end connected to the output terminal.

[0015] In some embodiments, the compensation module further includes:

[0016] The filter capacitor has one end connected to the first common electrode and the other end connected to the first resistor.

[0017] In some embodiments, the display panel further includes:

[0018] A first trace resistor connected in series between the second input terminal and the first common electrode;

[0019] A second trace resistor is connected in series between the output terminal and the second common electrode.

[0020] The display device according to the embodiments of this application is characterized in that it includes the aforementioned display panel.

[0021] The compensation method for the display panel in this application includes:

[0022] The display panel is divided into a central area and a peripheral area;

[0023] A sampling point is set on the first common electrode of the display panel, and a sampling line is connected to the sampling point. The other end of the sampling line is connected to the compensation module.

[0024] A compensation point is set at the second common electrode at the edge of the central area, and a compensation line is connected to the compensation point. The other end of the compensation line is connected to the compensation module.

[0025] The feedback voltage of the sampling point is obtained through the compensation trace connected to the compensation module, and the corresponding compensation voltage is calculated based on the feedback voltage and the preset reference voltage, and then fed back to the compensation point through the compensation trace.

[0026] In the display panel, display device, and compensation method of this application, a compensation module is connected to a reference voltage terminal, a first common electrode, and a second common electrode located in the central region. This allows the compensation module to sample the first common electrode and generate a compensation voltage, which is then input to compensate the second common electrode located in the central region. Due to the coupling between the first and second common electrodes, the first common electrode is compensated while the second common electrode is being compensated. Furthermore, due to the in-plane impedance, the common voltage recovers faster at the edges. Therefore, compensating only the second common electrode located in the central region results in a larger compensation factor in the central region and a smaller compensation factor in the peripheral region, achieving uniform compensation of the display panel. This reduces the crosstalk phenomenon of the display panel and effectively improves the display effect. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0028] Figure 1 This is a circuit diagram of a display panel according to certain embodiments of this application.

[0029] Figure 2 This is a schematic diagram of the structure of a display panel according to certain embodiments of this application.

[0030] Figure 3 This is yet another schematic diagram of a display panel according to certain embodiments of this application.

[0031] Figure 4 This is a schematic diagram of the display panel layout according to certain embodiments of this application.

[0032] Key component designations:

[0033] 10-Display panel, 101-Central area, 102-Peripheral area, 105-Connection area, 106-Display area, 107-Auxiliary area, 11-Display module, 111-First common electrode, 112-Second common electrode, Ref-Reference voltage terminal, Data-Data line, Gate-Gate line, Mos-Drive transistor, ITO pixel, Cst-Energy storage capacitor, Clc-Liquid crystal capacitor, 12-Compensation module, 13-Sampling trace, 14-Compensation trace, R1-First resistor, R2-Second resistor, C1-Filter capacitor, 121-Comparator amplifier, R3-First trace resistor, R4-Second trace resistor, BL-Backlight layer, TFT-Array substrate, LCD-Liquid crystal layer, CF-Color filter substrate. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0035] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships 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, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between 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.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0039] Typically, the common electrode (VCOM) line in a liquid crystal display (LCD) panel is coupled to data lines and gate lines. This coupling often causes voltage fluctuations in the VCOM line (crosstalk phenomenon), also known as noise or ripple. If the VCOM voltage cannot recover quickly after this disturbance, the LCD panel will display abnormal images. Furthermore, for some LCD products that tend to have larger screens and higher refresh rates (>100Hz) (such as MNT LCD products), the crosstalk effect is exacerbated, making the display abnormalities noticeable to users. Therefore, crosstalk has become a pressing issue that needs to be addressed in LCD panel design.

[0040] In related technologies, a compensation module can be added to the common electrode (VCOM) generation unit on the circuit board (PCBA) of the liquid crystal display panel. The compensation module is connected to the common electrode line inside the liquid crystal panel through the VCOM voltage trace. That is, the compensation module is connected from the VCOM generation unit on the PCBA to the common electrode inside the liquid crystal display panel. The compensation module is used to stabilize the VCOM voltage, thereby compensating for VCOM and restoring the VCOM voltage to a stable value after the drive is disturbed. However, due to differences in film structure, the above solution is only applicable to LCD products using Advanced Super Dimension Switch (ADS) technology. For LCD products using Vertical Alignment (VA) technology, since the Data signal affects both the TFT VCOM and the CF VCOM simultaneously through parasitic capacitance Cdc, improvements are needed for both. The common compensation solution in the industry is to sample and compensate for TFT VCOM and CF VCOM respectively. However, simply increasing the number of compensations will not only cause compensation conflicts between TFT and CF, but also increase the number of traces, which will inevitably lead to increased trace delay (increased line resistance), causing compensation failure. At the same time, the required VCOM compensation multiples for different areas within the panel also differ, resulting in uneven compensation. Therefore, this compensation solution can only solve the H-Crosstalk problem at low resolution (FHD) and low refresh rate (<100Hz), and cannot completely solve the Crosstalk problem of VA products under high refresh rate and high resolution conditions.

[0041] Please combine Figure 1 and Figure 2 In view of this, the present application provides a display panel 10, which is divided into a central area 101 and a peripheral area 102 located on the side of the central area 101. The display panel 10 includes a display module 11 and a compensation module 12. The display module 11 includes a first common electrode 111 and a second common electrode 112. The first common electrode 111 and the second common electrode 112 are coupled together. The compensation module 12 is connected to a reference voltage terminal Ref, the first common electrode 111 and the second common electrode 112 located in the central area 101, respectively. The compensation module 12 is used to generate a compensation voltage based on the voltage of the first common electrode 111 and the reference voltage of the reference voltage terminal Ref to compensate the second common electrode 112.

[0042] In the display panel 10 of this application embodiment, a compensation module 12 is connected to a reference voltage terminal Ref, a first common electrode 111, and a second common electrode 112 located in the central region 101. This allows the compensation module 12 to sample the first common electrode 111 and generate a compensation voltage, which is then input to compensate the second common electrode 112 located in the central region 101. Due to the coupling between the first common electrode 111 and the second common electrode 112, the first common electrode 111 is also compensated under the coupling effect while the second common electrode 112 is being compensated. At the same time, due to the effect of in-plane impedance, the common voltage recovery speed is faster at the edges. Therefore, compensating only the second common electrode 112 located in the central region 101 results in a larger compensation factor in the central region 101 and a smaller compensation factor in the peripheral region 102, thus optimizing the compensation effect and making the compensation of the display panel 10 more uniform. This reduces the crosstalk phenomenon of the display panel 10 and effectively improves the display effect of the display panel 10.

[0043] Specifically, the display panel 10 can be a liquid crystal display surface using vertically aligned pixel display technology, i.e., a VA liquid crystal display panel, and the display panel 10 can have high resolution and high refresh rate (greater than 100 Hz). The display panel 10 can be divided into three equal parts along its length, wherein the middle area is the central area 101, and the areas on both sides of the central area 101 are the peripheral areas 102.

[0044] Please combine further Figure 1The display panel 10 includes a display module 11 and a compensation module 12. The display module 11 includes a data line (Data), a gate line (Gate), a driving transistor (Mos), an ITO pixel (Pixel), a first common electrode 111, and a second common electrode 112. The first common electrode 111 and the second common electrode 112 are located on different layers. The first common electrode 111 includes a liquid crystal capacitor (Clc), and the second common electrode 112 may include the energy storage capacitor (Cst). The first common electrode 111 and the second common electrode 112 are capacitively coupled. The first electrode of the driving transistor (Mos) is connected to the data line (Data), the second electrode of the driving transistor (Mos) is connected to the ITO pixel (Pixel), and the control electrode of the driving transistor (Mos) is connected to the gate line (Gate). The driving transistor (Mos) is used to drive the ITO pixel (Pixel) to emit light according to the signals provided by the data line (Data) and the gate line (Gate). One end of the energy storage capacitor Cst of the second common electrode 112 is connected to the ITO pixel, and the other end of the energy storage capacitor Cst is connected to the compensation module 12. It is used to store energy to maintain the charge of the liquid crystal capacitor Clc. One end of the liquid crystal capacitor Clc of the first common electrode 111 is connected to the ITO pixel, and the other end of the liquid crystal capacitor Clc is connected to the compensation module 12. The liquid crystal capacitor Clc is used to control the deflection angle of the ITO pixel, thereby changing the transmittance of light to present different brightness (grayscale).

[0045] The display panel 10 may further include sampling traces 13 and compensation traces 14. The compensation module 12 can be connected to the first common electrode 111 via the sampling trace 13. The location of the connection to the first common electrode 111 can be a sampling point. The sampling trace 13 is used to collect the voltage of the sampling point in the first common electrode 111 and provide it to the compensation module 12. The compensation module 12 is also connected to the reference voltage terminal Ref and connected to the second common electrode 112 via the compensation trace 14. The location of the connection to the second common electrode 112 is a compensation point. The compensation point is located at the second common electrode 112 in the central region 101. The compensation module 12 is used to generate a compensation voltage based on the voltage of the first common electrode 111 collected by the sampling trace 13 and the reference voltage provided by the reference terminal, and provides the compensation voltage to the second common electrode 112 located at the center via the compensation trace 14.

[0046] Understandably, due to the varying voltage recovery speeds of the second common electrode 112 in different regions, the closer to the center region 101, the slower the recovery speed, requiring a larger compensation factor; conversely, the farther away from the center region 101, the faster the recovery speed. Therefore, compensation is applied to the second common electrode 112 located in the center region 101. Utilizing in-plane impedance, the compensation factor for the second common electrode 112 in the center region 101 is larger, while the compensation factor for the second common electrode 112 in the peripheral region 102 is smaller. This achieves uniform compensation for the display panel 10, thereby improving the Crosstalk effect and enhancing the display effect of the display panel 10. Simultaneously, due to the capacitive coupling between the first common electrode 111 and the second common electrode 112, while compensating the second common electrode 112, the first common electrode 111 is also compensated due to the coupling with the second common electrode 112, further improving the display effect of the display panel 10.

[0047] Further, please refer to Figure 3 The display panel 10 can also be functionally divided into a connection area 105, a display area 106, and an auxiliary area 107. The connection area 105 and the auxiliary area 107 are located on both sides of the display area 106. The display area 106 is used for displaying the image. The data line, gate line, driving transistor, and ITO pixel are located in the display area 106. The connection area 105 is the area for connecting the liquid crystal screen and the flexible circuit board. The compensation module 12 can be set in the connection area 105. The auxiliary area 107 can also be called the DPO (data pad opposite) area. It is the area for providing light and controlling the direction and brightness of the light to realize the display of the image. The first common electrode 111 and the second common electrode 112 can be at least partially located in the auxiliary area 107. The first common electrode 111 and the second common electrode 112 located in the auxiliary area 107 are respectively connected to the ITO pixel located in the display area 106. The sampling point can be located at any position in the auxiliary region 107 of the first common electrode 111, and the compensation point is located in the auxiliary region 106 and the second common electrode 112 of the center region 101.

[0048] In some examples, the display panel 10 can be evenly divided into 6 regions along its length, where regions 1 and 2 are peripheral regions 102, regions 3 and 4 are central regions 101, and regions 5 and 6 are peripheral regions 102. The compensation point can be any position in the second common electrode 112 at the edge of regions 3 and 4.

[0049] Please combine further Figure 1In some embodiments, the compensation module 12 includes a first resistor R1, a comparator amplifier 121, and a second resistor R2. One end of the first resistor R1 is connected to a first common electrode 111. The comparator amplifier 121 includes a first input terminal, a second input terminal, and an output terminal. The first input terminal is connected to a reference voltage terminal Ref, the second input terminal is connected to the other end of the first resistor R1, and the output terminal is connected to the second common electrode 112. One end of the second resistor R2 is connected to the second input terminal, and the other end of the second resistor R2 is connected to the output terminal.

[0050] It should be noted that when the voltages at the first and second input terminals of the comparator amplifier 121 are constant, the compensation voltage at the output terminal of the common comparator amplifier 121 is related to the ratio between the first resistor R1 and the second resistor R2. The first resistor R1 has a fixed value, while the value of the second resistor R2 is adjustable. Therefore, after determining the compensation factor, the value of the second resistor R2 can be adjusted to change the ratio between the first resistor R1 and the second resistor R2, thereby adjusting the magnitude of the compensation voltage so that the compensation voltage output by the comparator amplifier 121 meets the compensation requirements of the second common electrode 112.

[0051] In this way, the compensation factor of the compensation voltage can be adjusted by changing the ratio of the first resistor R1 and the second resistor R2, so that the comparator amplifier 121 can output a compensation voltage that meets the compensation requirements of the display panel 10.

[0052] Please combine Figure 1 In some embodiments, the compensation module 12 further includes a filter capacitor C1, one end of which is connected to the first common electrode 111, and the other end of which is connected to the first resistor R1.

[0053] It should be noted that the filter capacitor C1 can pass AC while blocking DC, preventing DC components from entering, thereby improving the performance and stability of the comparator amplifier 121 and ensuring the stability of the compensation module 12.

[0054] Please combine Figure 1 In some embodiments, the display panel 10 further includes a first wiring resistor R3 and a second wiring resistor R4. The first wiring resistor R3 is connected in series between the second input terminal and the first common electrode 111, and the second wiring resistor R4 is connected in series between the output terminal and the second common electrode 112.

[0055] Specifically, the first trace resistor R3 can be the resistor of the sampling trace 13, the second trace resistor R4 can be the resistor of the compensation trace 14, one end of the first trace resistor R3 is connected to the first common electrode 111, and the other end is connected to the filter capacitor C1, one end of the second trace resistor R4 is connected to the second common electrode 112, and the other end is connected to the output terminal of the comparator amplifier 121.

[0056] In some embodiments, the second common electrode 112 includes multiple compensation points, which are symmetrically distributed on both sides of the center line of the central region 101. The compensation module 12 includes multiple compensation points, and one compensation module 12 is connected to one compensation point.

[0057] Please combine Figure 4 In some embodiments, the display module 11 includes an array substrate TFT, a liquid crystal layer LCD, and a color filter substrate CF. The liquid crystal layer LCD is located between the array substrate TFT and the color filter substrate CF. A first common electrode 111 is located on the array substrate TFT, and a second common electrode 112 is located on the color filter substrate CF. That is, the first common electrode 111 is the common electrode of the array substrate TFT, and the second common electrode 112 is the common electrode of the color filter substrate CF.

[0058] In some embodiments, the display module 11 includes an array substrate TFT, a liquid crystal layer LCD, and a color filter substrate CF. The liquid crystal layer LCD is located between the array substrate TFT and the color filter substrate CF. The display module 11 is located on the liquid crystal layer LCD. A first common electrode 111 is electrically connected to the color filter substrate CF, and a second common electrode 112 is electrically connected to the array substrate TFT. That is, in this embodiment, the first common electrode 111 is the color filter substrate common electrode, and the second common electrode 112 is the array substrate common electrode.

[0059] Understandably, since the TFT film layer of the array substrate is a mesh structure and the CF of the color filter substrate is a whole-plane structure, the in-plane delay difference is relatively large. When the common electrode of the TFT of the array substrate is compensated, it can only compensate a very small local area. Therefore, by sampling the common electrode of the TFT of the array substrate and compensating the common electrode of the CF of the color filter substrate, the compensation effect is better and the display effect of the display panel 10 is improved.

[0060] Please combine further Figure 4 In some embodiments, the display panel 10 further includes a backlight layer BL located on the side of the array substrate TFT away from the liquid crystal layer LCD, and the compensation module 12 is located on the backlight layer BL.

[0061] In this way, the compensation module 12 can compensate for the common electrode of the display panel 10, thus ensuring the display effect of the display panel 10.

[0062] The display device according to the embodiments of this application includes the display panel 10 of any of the above embodiments.

[0063] In the display device of this application, a compensation module 12 is connected to a reference voltage terminal Ref, a first common electrode 111, and a second common electrode 112 located in the central region 101. This allows the compensation module 12 to sample the first common electrode 111 and generate a compensation voltage, which is then input to compensate the second common electrode 112 located in the central region 101. Due to the coupling between the first common electrode 111 and the second common electrode 112, the first common electrode 111 is also compensated under the coupling effect while the second common electrode 112 is being compensated. At the same time, due to the effect of in-plane impedance, the common voltage recovery speed is faster at the edges. Therefore, compensating only the second common electrode 112 located in the central region 101 results in a larger compensation factor in the central region 101 and a smaller compensation factor in the peripheral region 102, achieving uniform compensation in the display device. This reduces the crosstalk phenomenon of the display device and effectively improves the display effect.

[0064] This application also provides a compensation method for compensating the display panel 10 in any of the above embodiments. The compensation method includes:

[0065] 01. The display panel is divided into a central area and a peripheral area;

[0066] 02. Set a sampling point on the first common electrode of the display panel, and connect a sampling line to the sampling point. The other end of the sampling line is connected to the compensation module.

[0067] 03. Set a compensation point at the second common electrode at the edge of the central area, and connect a compensation line to the compensation point. The other end of the compensation line is connected to the compensation module.

[0068] 04. The feedback voltage of the sampling point is obtained through the compensation trace connected to the compensation module, and the corresponding compensation voltage is calculated based on the feedback voltage and the preset reference voltage, and then fed back to the compensation point through the compensation trace.

[0069] In the compensation method of the display panel 10 of this application embodiment, the display panel is divided into a central area and a peripheral area. A sampling point is set on the first common electrode and connected to the sampling point and the compensation module through sampling lines. A compensation point is set on the second common electrode at the edge of the central area and connected to the compensation point and the compensation module through compensation lines. This allows the compensation module to sample the first common electrode and generate a compensation voltage, and then input the compensation voltage to compensate the second common electrode located in the central area. Due to the coupling effect between the first and second common electrodes, the first common electrode is also compensated under the coupling effect while the second common electrode is being compensated. At the same time, due to the effect of in-plane impedance, the common voltage recovery speed is faster at the edges. Therefore, only compensating the second common electrode located in the central area results in a larger compensation multiple in the central area and a smaller compensation multiple in the peripheral area, achieving uniform compensation of the display panel, thereby reducing the crosstalk phenomenon of the display panel and effectively improving the display effect of the display panel.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

[0072] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included 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 display panel, characterized in that, The display panel is divided into a central area and a peripheral area located on the side of the central area. The display panel includes a display module and a compensation module. The display module includes a first common electrode and a second common electrode, which are coupled together. The compensation module is connected to a reference voltage terminal, the first common electrode, and the second common electrode located in the central area. The output terminal of the compensation module is connected to the second common electrode located in the central area. The compensation module is used to generate a compensation voltage based on the voltage of the first common electrode and the reference voltage of the reference voltage terminal to compensate the second common electrode. The display panel further includes a connection area, a display area, and an auxiliary area. The connection area and the auxiliary area are located on both sides of the display area. The second common electrode includes a compensation point connected to the compensation module, and the compensation point is located in the auxiliary area. Compensation is performed only on the second common electrode located in the central area.

2. The display panel according to claim 1, characterized in that, The second common electrode includes multiple compensation points, which are symmetrically distributed on both sides of the center line of the central area. The compensation module includes multiple compensation modules, and each compensation module is connected to one compensation point.

3. The display panel according to claim 1, characterized in that, The display module includes an array substrate, a liquid crystal layer, and a color filter substrate. The liquid crystal layer is located between the array substrate and the color filter substrate. The first common electrode is located on the array substrate, and the second common electrode is located on the color filter substrate.

4. The display panel according to claim 1, characterized in that, The display module includes an array substrate, a liquid crystal layer, and a color filter substrate. The liquid crystal layer is located between the array substrate and the color filter substrate. The display module is located on the liquid crystal layer. The first common electrode is electrically connected to the color filter substrate, and the second common electrode is electrically connected to the array substrate.

5. The display panel according to claim 3 or 4, characterized in that, The display panel also includes a backlight layer located on the side of the array substrate opposite to the liquid crystal layer, and the compensation module is located on the backlight layer.

6. The display panel according to claim 1, characterized in that, The compensation module includes: A first resistor, one end of which is connected to the first common electrode; The comparator amplifier includes a first input terminal, a second input terminal, and an output terminal. The first input terminal is connected to the reference voltage terminal, the second input terminal is connected to the other end of the first resistor, and the output terminal is connected to the second common electrode. The second resistor has one end connected to the second input terminal and the other end connected to the output terminal.

7. The display panel according to claim 6, characterized in that, The compensation module also includes: The filter capacitor has one end connected to the first common electrode and the other end connected to the first resistor.

8. The display panel according to claim 6, characterized in that, The display panel also includes: A first trace resistor connected in series between the second input terminal and the first common electrode; A second trace resistor is connected in series between the output terminal and the second common electrode.

9. A display device, characterized in that, Includes the display panel as described in any one of claims 1-8.

10. A compensation method for a display panel, characterized in that, Referring to the display panel according to any one of claims 1-8, the compensation method includes: The display panel is divided into a central area and a peripheral area; A sampling point is set on the first common electrode of the display panel, and a sampling line is connected to the sampling point. The other end of the sampling line is connected to the compensation module. A compensation point is set at the second common electrode at the edge of the central area, and a compensation line is connected to the compensation point. The other end of the compensation line is connected to the compensation module. The feedback voltage of the sampling point is obtained through the compensation trace connected to the compensation module, and the corresponding compensation voltage is calculated based on the feedback voltage and the preset reference voltage, and then fed back to the compensation point through the compensation trace.

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