Common voltage regulation unit and regulation method, display panel and display device

Abstract

This invention discloses a common voltage adjustment unit and method, a display panel, and a display device, relating to the field of display technology. It includes a voltage pull-down module and a voltage pull-up module, the outputs of which are both connected to a common voltage terminal. The input of the voltage pull-down module is connected to a first voltage terminal, and the input of the voltage pull-up module is connected to a second voltage terminal. One of the voltage pull-down and voltage pull-up modules is selectively activated. When the signal at the common voltage terminal is higher than a preset value, the voltage pull-down module pulls the signal down to a stable potential; when the signal at the common voltage terminal is lower than the preset value, the voltage pull-up module pulls the signal up to a stable potential. In this way, the common voltage can be adjusted in real time and maintained at a stable potential, improving the uniformity and stability of the common voltage within the display area and reducing crosstalk.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a common voltage regulation unit and regulation method, a display panel and a display device. Background Technology

[0002] The liquid crystal display panel has a common electrode and pixel electrodes. The common electrode is connected to a common voltage signal line and receives a common voltage signal. When a driving signal is provided to the pixel electrodes, an electric field is generated between the common electrode and the pixel electrodes to drive the liquid crystal to deflect, thus realizing the display function. The stability of the common voltage signal received by the common electrode directly determines the display effect of the panel. Due to the limitations of the LCD panel's own structure, when the common voltage signal line overlaps with other signal lines in the display panel, voltage coupling may occur, resulting in crosstalk. Generally, it is necessary to adjust the common voltage of the liquid crystal molecules to improve the crosstalk phenomenon and adjust the display effect of the LCD panel. Currently, there are two commonly used methods to adjust the common voltage of the LCD panel: one is to reduce the total resistance of the common voltage signal line by adding a metal layer. The method of adding a metal layer is to place the common voltage signal line in multiple metal film layers, and the common voltage signal lines of each film layer are connected in parallel to reduce the overall resistance of the common voltage signal line and shorten the delay time of the common voltage signal; the other is to use feedback to detect the signal coupled to the common voltage, invert and amplify it, and then feed it back to the common voltage to shorten the delay time. The former method of adding a metal layer has a better effect on improving crosstalk, but it increases the construction process, increases costs, and reduces the yield of metal-related components; the latter method makes the circuit design more complex, and if the common terminal itself has a large surface resistance, the compensation effect is questionable. Summary of the Invention

[0003] In view of this, this application provides a common voltage regulation unit and regulation method, a display panel and a display device for real-time compensation of the common voltage, elimination of crosstalk and improvement of display quality.

[0004] In a first aspect, this application provides a common voltage regulation unit, including: a voltage pull-down module and a voltage pull-up module, wherein the output terminals of the voltage pull-down module and the voltage pull-up module are both connected to a common voltage terminal;

[0005] The input terminal of the voltage pull-down module is connected to the first voltage terminal, and the input terminal of the voltage pull-up module is connected to the second voltage terminal. The voltage pull-down module and the voltage pull-up module are selectively turned on. When the signal at the common voltage terminal is higher than a preset value, the voltage pull-down module is used to pull the signal at the common voltage terminal down to a stable potential. When the signal at the common voltage terminal is lower than the preset value, the voltage pull-up module is used to pull the signal at the common voltage terminal up to a stable potential.

[0006] Secondly, this application also provides a display panel, the display panel including the common voltage adjustment unit described in the first aspect, the common voltage adjustment unit being located in the non-display area of ​​the display panel, the non-display area including a first voltage line and a second voltage line;

[0007] The input terminal of the voltage pull-down module is connected to the first voltage terminal of the first voltage line, and the output terminal of the voltage pull-down module is connected to the common voltage terminal of the common voltage line.

[0008] The input terminal of the voltage pull-up module is connected to the second voltage terminal of the second voltage line, and the output terminal of the voltage pull-up module is connected to the common voltage terminal of the common voltage line.

[0009] Thirdly, this application also provides a method for real-time adjustment of the common voltage of a display panel, wherein the method is applied to the display panel described in the second aspect and includes the following steps:

[0010] S1: Common voltage input display area generated by the common voltage line;

[0011] S2: Monitor the crosstalk phenomenon of the screen to be displayed on the display panel and determine whether the common voltage needs to be compensated;

[0012] S3: When the common voltage needs to be compensated, the common voltage is compensated under the regulation of the common voltage regulation unit.

[0013] Fourthly, this application also provides a display device, including the display panel described in the second aspect.

[0014] Compared with the prior art, the common voltage regulation unit and regulation method, display panel and display device provided in this application achieve at least the following beneficial effects:

[0015] 1. The common voltage adjustment unit can be flexibly set in the non-display area of ​​the display panel to detect and restore the common voltage of each potential in real time. When the real-time voltage of the common voltage terminal is higher than the preset voltage value, the voltage pull-up module in the common voltage adjustment unit is turned off, and the voltage pull-down module connects the first voltage terminal to the common voltage terminal. The low voltage of the first voltage terminal pulls the real-time voltage of the common voltage terminal down to a stable potential. When the real-time voltage of the common voltage terminal is lower than the preset voltage value, the voltage pull-down module in the common voltage adjustment unit is turned off, and the voltage pull-up module connects the second voltage terminal to the common voltage terminal. The high voltage of the second voltage terminal pulls the real-time voltage of the common voltage terminal up to a stable potential. In this way, the in-plane uniformity and stability of the common voltage can be improved, and crosstalk can be reduced.

[0016] 2. The common voltage adjustment unit can also be set only at the intersection of the first non-display area and the second non-display area, so as to achieve a narrow bezel while adjusting the common voltage in real time;

[0017] 3. By setting the threshold voltage of the transistor in the common voltage regulation unit to be equal to the preset value of the voltage at the common voltage terminal, the transistor in the common voltage regulation unit can be turned off and on by controlling the actual voltage at the common voltage terminal, thereby realizing real-time regulation of the common voltage.

[0018] 4. The common voltage adjustment unit is located within the TFT surface, eliminating the need for additional mask costs.

[0019] Of course, any product implementing this application does not necessarily need to achieve all of the technical effects described above at the same time.

[0020] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0022] Figure 1 The diagram shown is a schematic diagram of a common voltage regulation unit structure provided in an embodiment of this application;

[0023] Figure 2 The diagram shown is a structural schematic of a voltage pull-down module in a common voltage regulation unit provided in an embodiment of this application.

[0024] Figure 3 The diagram shown is a structural schematic of a voltage pull-up module in a common voltage regulation unit provided in an embodiment of this application;

[0025] Figure 4 The diagram shown is a structural schematic of a voltage pull-up module in a common voltage regulation unit provided in an embodiment of this application;

[0026] Figure 5 The diagram shown is a structural schematic of a display panel provided in an embodiment of this application;

[0027] Figure 6 The diagram shown is a structural schematic of a display panel provided in an embodiment of this application;

[0028] Figure 7 The diagram shown is a flowchart of a common voltage regulation method provided in an embodiment of this application;

[0029] Figure 8 The diagram shown is a structural schematic of a display device provided in an embodiment of the present invention. Detailed Implementation

[0030] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0031] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0032] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0033] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0035] Figure 1 The diagram shown is a schematic representation of a common voltage regulation unit provided in an embodiment of this application. Please refer to it. Figure 1 In a first aspect, this application provides a common voltage regulation unit 00, including: a voltage pull-down module L1 and a voltage pull-up module L2, wherein the output terminals of the voltage pull-down module L1 and the voltage pull-up module L2 are both connected to a common voltage terminal V1;

[0036] The input terminal of the voltage pull-down module L1 is connected to the first voltage terminal V2, and the input terminal of the voltage pull-up module L2 is connected to the second voltage terminal V3. Either the voltage pull-down module L1 or the voltage pull-up module L2 is turned on. When the signal of the common voltage terminal V1 is higher than a preset value, the voltage pull-down module L1 is used to pull the signal of the common voltage terminal V1 down to a stable potential. When the signal of the common voltage terminal V1 is lower than a preset value, the voltage pull-up module L2 is used to pull the signal of the common voltage terminal V1 up to a stable potential.

[0037] Specifically, the common voltage regulation unit 00 includes a voltage pull-down module L1 and a voltage pull-up module L2. The input terminal of the voltage pull-down module L1 is connected to the first voltage terminal V2, and the output terminal of the voltage pull-down module L1 is connected to the common voltage terminal V1. The input terminal of the voltage pull-up module L2 is connected to the second voltage terminal V3, and the output terminal of the voltage pull-up module L2 is connected to the common voltage terminal V1. That is, the output terminals of both the voltage pull-down module L1 and the voltage pull-up module L2 are connected to the common voltage terminal V1, and the first voltage terminal V2 is connected to the voltage pull-down module L2. The input terminal of block L1, the second voltage terminal V3, is connected to the input terminal of voltage pull-up module L2. Voltage pull-down module L1 and voltage pull-up module L2 are selectively turned on. When the signal at the common voltage terminal V1 is higher than a preset value, voltage pull-up module L2 is turned off, and voltage pull-down module L1 is turned on. Voltage pull-down module L1 is used to pull the signal at the common voltage terminal V1 down to a stable potential. When the signal at the common voltage terminal V1 is lower than a preset value, voltage pull-up module L2 is turned on, and voltage pull-down module L1 is turned off. Voltage pull-up module L2 is used to pull the signal at the common voltage terminal V1 down to a stable potential. The signal at the common voltage terminal V1 is pulled high to a stable potential. Thus, by setting a common voltage regulation unit 00 with a voltage pull-up module L2 and a voltage pull-down module L1, when the real-time voltage at the common voltage terminal V1 differs from a preset value, one of the voltage pull-down module L1 and voltage pull-up module L2 is selectively turned on. For example, when the signal at the common voltage terminal V1 is higher than the preset value, the voltage pull-up module L2 is turned off, and the voltage pull-down module L1 is turned on. The voltage pull-down module L1 connects the first voltage terminal V2 to the common voltage terminal V1. The low voltage in step 2 pulls down the excessively high real-time voltage in the common voltage terminal V1 to a stable potential. When the signal in the common voltage terminal V1 is lower than the preset value, the voltage pull-up module L2 is turned on and the voltage pull-down module L1 is turned off. The voltage pull-up module L2 connects the second voltage terminal V3 to the common voltage terminal V1. The high voltage in the second voltage terminal V3 pulls up the excessively low real-time voltage in the common voltage terminal V1 to a stable potential. In this way, the common voltage can be maintained at a stable potential, improving the uniformity and stability of the common voltage in the display area and reducing crosstalk.

[0038] It should be noted that the common voltage terminal V1 can be regarded as a port in the display panel that provides a fixed voltage signal to the display panel. For example, the common voltage terminal V1 can provide a corresponding voltage signal to the common electrode in the display panel.

[0039] Figure 2 The diagram shown is a structural schematic of a voltage pull-down module in a common voltage regulation unit according to an embodiment of this application. Please refer to it. Figure 1 and Figure 2 This application provides a common voltage regulation unit 00, wherein the voltage pull-down module L1 includes a first transistor J1 and a second transistor J2;

[0040] The first terminal J11 of the first transistor J1 and the first terminal J21 of the second transistor J2 are both connected to the input terminal of the voltage pull-down module L1. The gate J12 and the second terminal J13 of the first transistor J1 and the gate J22 of the second transistor J2 are both connected to the output terminal of the voltage pull-down module L1. The second terminal J23 of the second transistor J2 is connected to the first node D1.

[0041] Specifically, the common voltage regulation unit 00 includes a voltage pull-up module L2 and a voltage pull-down module L1. The voltage pull-down module L1 includes a first transistor J1 and a second transistor J2. The first terminal J1 of the first transistor J1 is connected to the input terminal of the voltage pull-down module L1, and the first terminal J21 of the second transistor J2 is also connected to the input terminal of the voltage pull-down module L1. That is, both the first terminals J11 and J21 of the first transistor J1 and the second transistor J2 are connected to the input terminal of the voltage pull-down module L1. The gate J12 of the first transistor J1 is connected to... The second terminal J23 of the first transistor J1 is connected to the output terminal of the voltage pull-down module L1, and the gate J22 of the second transistor J2 is connected to the output terminal of the voltage pull-down module L1. That is, the output terminal of the voltage pull-down module L1 is connected to the gate J12 and the second terminal J13 of the first transistor J1 and the gate J22 of the second transistor J2. The second terminal J23 of the second transistor J2 is connected to the first node D1. It should be noted that the first node D1 is the connection point between the voltage pull-down module L1 and the voltage pull-up module L2. Thus, by setting up a voltage pull-down module L1 with a specific connection method for the first transistor J1 and the second transistor J2, when the actual voltage of the common voltage terminal V1 is too high, the gate J12 voltage of the first transistor J1 connected to the common voltage terminal V1 is larger, and the first transistor J1 is turned on. The gate J22 voltage of the second transistor J2 connected to the common voltage terminal V1 is also larger, and the second transistor J2 is turned on. In this way, a path can be established between the common voltage terminal V1 and the first voltage terminal V2, thereby pulling the common voltage down to a stable potential and improving the crosstalk caused by the high common voltage.

[0042] Figure 3 The diagram shown is a structural schematic of a voltage pull-up module in a common voltage regulation unit according to an embodiment of this application. Please refer to it. Figure 1 and Figure 3 This application provides a common voltage regulation unit 00, wherein the voltage pull-up module L2 includes a first element Y1 and a third transistor J3; the first terminal Y11 of the first element Y1 and the first electrode J31 of the third transistor J3 are both connected to the input terminal of the voltage pull-up module L2, the second electrode J33 of the third transistor J3 is connected to the output terminal of the voltage pull-up module L2, and the second terminal Y12 of the first element Y1 is connected to the first node D1.

[0043] Specifically, the common voltage regulation unit 00 includes a voltage pull-down module L1 and a voltage pull-up module L2. The voltage pull-up module L2 includes a first element Y1, with its first terminal Y11 connected to the input terminal of the voltage pull-up module L2, and its second terminal Y12 connected to a first node D1. The first node D1 is the connection point between the voltage pull-down module L1 and the voltage pull-up module L2. The voltage pull-up module L2 also includes a third transistor J3, with its first terminal J31 connected to the input terminal of the voltage pull-up module L2, and its second terminal J33 connected to the output terminal of the voltage pull-up module L2. In other words, the voltage pull-up module L2 includes a first element Y1 and a third transistor J3. The input terminal of the voltage pull-up module L2 is connected to the first terminal Y11 of the first element Y1 and the first terminal J31 of the third transistor J3. The output terminal of the voltage pull-up module L2 is connected to the first terminal Y11 of the first element Y1 and the first terminal J31 of the third transistor J3. The output terminal is connected to the second terminal J33 of the third transistor J3. Thus, by setting the voltage pull-up module L2 of the first element Y1 and the third transistor J3 with a specific connection method, when the actual voltage of the common voltage terminal V1 is low, the voltage of the gate J12 of the first transistor J1 connected to the common voltage terminal V1 is small, and the first transistor J1 is turned off. The voltage of the gate J22 of the second transistor J2 connected to the common voltage terminal V1 is small, and the second transistor J2 is turned off. The voltage output of the second voltage terminal V3 is higher than the actual voltage of the common voltage terminal V1. The first element Y1 connected to the second voltage terminal V3 is turned on. The second terminal Y12 of the first element Y1 is connected to the gate Y32 of the third transistor J3, and the third transistor J3 is turned on. In this way, a path can be established between the common voltage terminal V1 and the second voltage terminal V3, thereby pulling the common voltage up to a stable potential and improving the crosstalk caused by the low common voltage.

[0044] Figure 4 The diagram shown is a structural schematic of a voltage pull-up module in a common voltage regulation unit according to an embodiment of this application. Please refer to the diagram for details. Figures 1 to 4 This application provides a common voltage regulation unit 00, wherein the first element Y1 is the fourth transistor J4; the gate J42 and the second terminal J43 of the fourth transistor J4 and the first terminal J31 of the third transistor J3 are all connected to the input terminal of the voltage pull-up module L2, the second terminal J33 of the third transistor J3 is connected to the output terminal of the voltage pull-up module L2, and the first terminal J41 of the fourth transistor J4 and the gate J32 of the third transistor J3 are both connected to the first node D1.

[0045] Specifically, the common voltage regulation unit 00 includes a voltage pull-down module L1 and a voltage pull-up module L2. The voltage pull-up module L2 includes a first element Y1 and a third transistor J3. When the first element Y1 in the voltage pull-up module L2 is a fourth transistor J4, the gate J42 of the fourth transistor J4 is connected to the input terminal of the voltage pull-up module L2, the second terminal J43 of the fourth transistor J4 is connected to the input terminal of the voltage pull-up module L2, the first terminal J41 of the fourth transistor J4 is connected to the first node D1, and the first terminal J31 of the third transistor J3 is connected to the input terminal of the voltage pull-up module L2. At the input terminal, the second terminal J33 of the third transistor J3 is connected to the output terminal of the voltage pull-up module L2, and the gate J32 of the third transistor J3 is connected to the first node D1. That is, when the first element Y1 in the voltage pull-up module L2 is the fourth transistor J4, the gate J42 and the second terminal J43 of the fourth transistor J4 are both connected to the input terminal of the voltage pull-up module L2, and the first terminal J41 of the fourth transistor J4 is connected to the first node D1. The first node D1 is the connection point between the voltage pull-up module L2 and the voltage pull-down module L1. The gate J32 of the third transistor J3 is connected to the first node D1. D1, the first node D1 is connected to the first terminal J41 of the fourth transistor J4. The first node D1 is also connected to the second transistor J2 in the voltage pull-down module L1. That is, the gate J32 of the third transistor J3 is connected to the first terminal J41 of the fourth transistor J4 and the second terminal J23 of the second transistor J2 in the voltage pull-down module L1. Thus, when the first element Y1 in the voltage pull-up module L2 is the fourth transistor J4, the voltage pull-up module L2 includes the fourth transistor J4 and the third transistor J3. When the actual voltage of the common voltage terminal V1 is low, the first transistor J4 connected to the common voltage terminal V1 is connected to the second transistor J2. When the gate voltage J12 of transistor J1 is low, transistor J1 is turned off. When the gate voltage J22 of transistor J2, which is connected to the common voltage terminal V1, is low, transistor J2 is turned off. When the gate voltage J42 of transistor J4, which is connected to the second voltage terminal V3, is high, transistor J4 is turned on. When the first terminal J41 of transistor J4 is connected to the gate J32 of transistor J3, transistor J3 is turned on. When common voltage terminal V1 and second voltage terminal V3 are connected, the low common voltage is pulled up to a stable potential, reducing crosstalk in display panel 100.

[0046] Please continue to refer to this. Figures 1 to 4 This application provides a common voltage regulation unit 00, wherein the first element Y1 is a capacitor or a resistor.

[0047] Specifically, the common voltage regulation unit 00 includes a voltage pull-down module L1 and a voltage pull-up module L2. The voltage pull-up module L2 includes a first element Y1 and a third transistor J3. The first element Y1 in the voltage pull-up module L2 can be a capacitor or a resistor. When the first element Y1 is a capacitor, the first terminal Y11 of the capacitor is connected to the input terminal of the voltage pull-up module L2, and the second terminal Y12 of the capacitor is connected to the first node D1. The first node D1 is also connected to the gate J32 of the third transistor J3. The first node D1 is also connected to the second terminal J23 of the second transistor J2 in the voltage pull-down module L1. That is, the second terminal Y12 of the capacitor is connected to the gate J32 of the third transistor J3 and... The second terminal J23 of the second transistor J2 is connected; when the first element Y1 is a resistor, the first terminal Y11 of the resistor is connected to the input terminal of the voltage pull-up module L2, and the second terminal Y12 of the resistor is connected to the first node D1; the first node D1 is also connected to the gate J32 of the third transistor J3, and the first node D1 is also connected to the second terminal J23 of the second transistor J2 in the voltage pull-down module L1. That is, the second terminal Y12 of the resistor is connected to the gate J32 of the third transistor J3 and the second terminal J23 of the second transistor J2; in other words, when the first element Y1 in the voltage pull-up module L2 is a capacitor or resistor, the first terminal Y11 of the capacitor or resistor is connected to the voltage pull-up module L2. The input terminal is connected, and the second terminal Y12 of the capacitor or resistor is connected to the first node D1. The first node D1 is the connection point between the voltage pull-up module L2 and the voltage pull-down module L1. The gate J32 of the third transistor J3 is connected to the first node D1. The first node D1 is also connected to the second transistor J2 in the voltage pull-down module L1. That is, the second terminal Y12 of the capacitor or resistor is connected to the gate J32 of the third transistor J3 and the second terminal J23 of the second transistor J2 in the voltage pull-down module L1. Thus, when the first element Y1 in the voltage pull-up module L2 is a capacitor or resistor, the voltage pull-up module L2 includes a capacitor and the third transistor J3. Alternatively, the voltage pull-up module L2 includes... The display panel 100 includes a resistor and a third transistor J3. When the actual voltage of the common voltage terminal V1 is low, the gate voltage J12 of the first transistor J1 connected to the common voltage terminal V1 is low, and the first transistor J1 is turned off. The gate voltage J22 of the second transistor J2 connected to the common voltage terminal V1 is low, and the second transistor J2 is turned off. The capacitor or resistor connected to the second voltage terminal V3 forms a voltage drop at the end connected to the first node D1. The voltage at the first node D1 is greater than the threshold voltage of the third transistor J3, and the third transistor J3 is turned on. The common voltage terminal V1 and the second voltage terminal V3 form a path, thereby pulling the low common voltage to a stable potential and reducing crosstalk in the display panel 100.

[0048] Please continue to refer to this. Figures 1 to 4This application provides a common voltage regulation unit 00, wherein the voltage pull-up module L2 and the voltage pull-down module L1 each include at least one transistor, and the threshold voltage of each transistor is equal to the preset value of the voltage of the common voltage terminal V1.

[0049] Specifically, the common voltage regulation unit 00 includes a voltage pull-up module L2 and a voltage pull-down module L1. Each module includes at least one transistor, and the threshold voltage of each transistor is equal to a preset value of the voltage at the common voltage terminal V1. It should be noted that the preset value of the voltage at the common voltage terminal V1 is a preset voltage value supplied to the common electrode in the display panel. The specific preset value may vary between different products. For example, the source line has two types: positive and negative voltage, and dual positive voltage. When the source line is positive and negative voltage, assuming the positive voltage is +5V and the negative voltage is -5V, the preset value of the voltage at the common voltage terminal V1 is 0V. When the source line is dual positive voltage, assuming the positive voltage is +0V. The voltage is between 5V and +10.5V. At this time, the preset value of the voltage of the common voltage terminal V1 is 5.5V. Therefore, the preset value of the voltage of the common voltage terminal V1 is not unique and can be set according to actual needs. It is only necessary to ensure that the threshold voltage of the transistor in the common voltage adjustment unit 00 is equal to the preset value of the voltage of the common voltage terminal V1. In this way, the threshold voltage of the transistor in the common voltage adjustment unit 00 is set to be equal to the preset value of the voltage of the common voltage terminal V1. When the actual voltage of the common voltage terminal V1 deviates from the preset value of the voltage of the common voltage terminal V1, the actual voltage of the common voltage terminal V1 is adjusted to a stable potential by turning on or off the transistors in the voltage pull-down module L1 and voltage pull-up module L2 in the common voltage adjustment unit 00.

[0050] Please continue to refer to this. Figures 1 to 4This application provides a common voltage regulation unit 00, wherein the transistors in the voltage pull-up module L2 and the voltage pull-down module L1 are either P-type transistors or both are N-type transistors. Specifically, the transistors in the voltage pull-up module L2 and the voltage pull-down module L1 of the common voltage regulation unit 00 are both P-type transistors, or the transistors in the voltage pull-up module L2 and the voltage pull-down module L1 of the common voltage regulation unit 00 are both N-type transistors; when they are both P-type transistors, the transistors in the voltage pull-up module L2 and the voltage pull-down module L1 are in a conducting state when a low-level signal is applied to the gate, and in a cut-off state when a high-level signal is applied to the gate; when they are both N-type transistors, the transistors in the voltage pull-up module L2 and the voltage pull-down module L1 are in a cut-off state when a high-level signal is applied to the gate. In the on state, the transistors in the voltage pull-up module L2 and the voltage pull-down module L1 are in the off state when a low-level signal is applied to their gates. Thus, by simultaneously setting the transistors in the voltage pull-up module L2 and the voltage pull-down module L1 as P-type transistors or simultaneously setting them as N-type transistors, when the actual voltage of the common voltage terminal V1 deviates from the preset value, it can be ensured that one of the voltage pull-down module L1 and the voltage pull-up module L2 in the common voltage regulation unit 00 is turned on, and the actual voltage of the common voltage terminal V1 is adjusted to a stable potential. In addition, when the same type of transistor is used, the corresponding transistor can be fabricated in the same process, which helps to simplify the manufacturing process and improve production efficiency.

[0051] Figure 5 The diagram shown is a structural schematic of a display panel provided in an embodiment of this application. Please refer to it for details. Figures 1 to 5 This application provides a display panel 100, including at least one common voltage adjustment unit 00 as described above. The common voltage adjustment unit 00 is located in the non-display area NA of the display panel 100. The non-display area NA includes a first voltage line X2 and a second voltage line X3.

[0052] The input terminal of the voltage pull-down module L1 is connected to the first voltage terminal V2 of the first voltage line X2, and the output terminal of the voltage pull-down module L1 is connected to the common voltage terminal V1 of the common voltage line X1.

[0053] The input terminal of the voltage pull-up module L2 is connected to the second voltage terminal V3 of the second voltage line X3, and the output terminal of the voltage pull-up module L2 is connected to the common voltage terminal V1 of the common voltage line X1.

[0054] Specifically, this application also provides a display panel 100, which includes a non-display area NA. At least one common voltage adjustment unit 00 is located within the non-display area NA of the display panel 100. The common voltage adjustment unit 00 includes a voltage pull-down module L1 and a voltage pull-up module L2. The non-display area NA includes a first voltage line X2 and a second voltage line X3. The first voltage line X2 includes a first voltage terminal V2, and the second voltage line X3 includes a second voltage terminal V3. The first voltage terminal V2 of the first voltage line X2 is connected to the voltage pull-down module L1. The input terminal of the common voltage line X1 is connected to the input terminal of the voltage pull-up module L2, the second voltage terminal V3 of the second voltage line X3 is connected to the input terminal of the voltage pull-up module L1, and the common voltage terminal V1 of the common voltage line X1 is connected to the output terminal of the voltage pull-up module L2. In this way, a common voltage adjustment unit 00 is set in the non-display area NA of the display panel 100, which can adjust the voltage of the common voltage terminal V1 of the display panel 100 to a stable potential and prevent crosstalk caused by unstable common voltage in the display panel 100.

[0055] Figure 6 The diagram shown is a structural schematic of a display panel provided in an embodiment of this application. Please refer to it. Figures 1 to 6 This application provides a display panel 100, in which a first voltage line X2 is arranged around the display area AA;

[0056] The second voltage line X3 is arranged around the first voltage line X2;

[0057] The voltage output by the first voltage line X2 is lower than the preset value of the common voltage terminal V1 of the display panel 100, while the voltage output by the second voltage line X3 is higher than the preset value of the common voltage terminal V1 of the display panel 100.

[0058] Specifically, the display panel 100 includes a non-display area NA. A first voltage line X2 and a second voltage line X3 are located within the non-display area NA. The first voltage line X2 surrounds the display area NA, and the second voltage line X3 surrounds the first voltage line X2. The voltage output by the first voltage line X2 is lower than the preset value of the common voltage terminal V1 of the display panel 100. That is, when the actual voltage output by the common voltage terminal V1 is greater than the preset value of the common voltage terminal V1, the first voltage terminal V2 of the first voltage line X2 is connected to the input terminal of the voltage pull-down module L1, and the common voltage terminal V1 of the common voltage line X1 is connected to the output terminal of the voltage pull-down module L1. The voltage pull-down module L1 is turned on, which can pull the actual voltage of the common voltage terminal V1 down to a stable potential. The voltage output by the second voltage line X3 is higher than... The preset value of the common voltage terminal V1 of the display panel 100, that is, when the actual voltage output by the common voltage terminal V1 is less than the preset value of the common voltage terminal V1, the second voltage terminal V3 of the second voltage line X3 is connected to the input terminal of the voltage pull-up module L2, and the common voltage terminal V1 of the common voltage line X1 is connected to the output terminal of the voltage pull-up module L2. The voltage pull-up module L2 is turned on, which can pull the actual voltage of the common voltage terminal V1 to a stable potential. In this way, by making the voltage output by the first voltage line X2 lower than the preset value of the common voltage terminal V1 of the display panel 100, and the voltage output by the second voltage line X3 higher than the preset value of the common voltage terminal V1 of the display panel 100, regardless of whether the actual voltage output by the common voltage terminal V1 is too high or too low, it can be pulled back to a stable potential.

[0059] Please continue to refer to this. Figures 1 to 6 This application provides a display panel 100, wherein the non-display area NA of the display panel 100 includes a first non-display area NA1 extending along a first direction D1 and a second non-display area NA2 extending along a second direction D2, wherein the first direction D1 and the second direction D2 intersect.

[0060] The common voltage adjustment unit 00 is arranged in an array within the first non-display area NA1 and the second non-display area NA2, or the common voltage adjustment unit 00 is located at the intersection NA0 of the first non-display area NA1 and the second non-display area NA2.

[0061] Specifically, the non-display area NA of the display panel 100 includes a first non-display area NA1 and a second non-display area NA2. The first non-display area NA1 extends along a first direction D1, and the second non-display area NA2 extends along a second direction D2. The first direction D1 and the second direction D2 intersect, and the first non-display area NA1 and the second non-display area NA2 have an intersection position NA0. In an optional embodiment of this application, the common voltage adjustment unit 00 is arrayed within the first non-display area NA1 and the second non-display area NA2. The array density can be adjusted according to actual conditions. Only the array of the common voltage adjustment unit 00 is required. The arrangement of the common voltage adjustment unit 00 is sufficient to ensure normal display of the display panel 100. In another optional embodiment of this application, the common voltage adjustment unit 00 is located at the intersection NA0 of the first non-display area NA1 and the second non-display area NA2. The space at the intersection NA0 of the first non-display area NA1 and the second non-display area NA2 is relatively spacious. The common voltage adjustment unit 00 is placed only at the intersection NA0 of the first non-display area NA1 and the second non-display area NA2, which can adjust the common voltage without occupying the width of the first non-display area NA1 and the second non-display area NA2, further narrowing the bezel of the display panel 100.

[0062] Figure 7 The diagram shown is a flowchart of a common voltage regulation method provided in an embodiment of this application. Please refer to it. Figures 1 to 7 This application provides a method for real-time adjustment of the common voltage of a display panel, applied to the display panel 100 as described above, comprising the following steps:

[0063] S1: Common voltage input display area AA generated by common voltage line X1;

[0064] S2: Monitor the crosstalk phenomenon of the screen to be displayed in the display panel 100 and determine whether the common voltage needs to be compensated.

[0065] S3: When the common voltage needs to be compensated, the common voltage is compensated under the adjustment of the common voltage adjustment unit 00.

[0066] Specifically, the real-time adjustment method for the common voltage of the display panel 100 includes the following steps: S1: The common voltage generated by the common voltage line X1 is input to the display area; S2: The crosstalk phenomenon of the image to be displayed in the display panel 100 is monitored, and it is determined whether the common voltage needs to be compensated; if there is no crosstalk phenomenon in the image to be displayed in the display panel 100, the common voltage does not need to be compensated; if there is crosstalk in the image to be displayed in the display panel 100, the common voltage needs to be compensated; S3: When the common voltage needs to be compensated, the common voltage is compensated under the adjustment of the common voltage adjustment unit 00. That is, when there is crosstalk in the image to be displayed in the display panel 100, the common voltage can be compensated by the common voltage adjustment unit 00 set in the non-display area NA of the display panel 100. In this way, the real-time compensation of the common voltage of the display panel can be achieved through a dynamic process of monitoring-judgment-compensation, and then monitoring-judgment-compensation.

[0067] Please continue to refer to this. Figures 1 to 7 This application provides a method for real-time adjustment of the common voltage of a display panel 100. The common voltage adjustment unit 00 includes a first transistor J1, a second transistor J2, a first element Y1, and a third transistor J3.

[0068] In S3

[0069] When the common voltage needs to be compensated and the common voltage is less than the threshold voltage of the transistor in the common voltage regulation unit 00, the first transistor J1 and the second transistor J2 are turned off, the first element Y1 is turned on by the high voltage output of the second voltage line X3, the third transistor J3 is turned on, the common voltage is connected to the high voltage output of the second voltage line X3 and is pulled up by the high voltage, and the common voltage is compensated to maintain a stable potential.

[0070] When the common voltage needs to be compensated and the common voltage is greater than the threshold voltage of the transistor in the common voltage regulation unit 00, the first transistor J1 and the second transistor J2 are turned on, the first element Y1 is turned on by the high voltage output of the second voltage line X3, the third transistor J3 is turned off, the common voltage is connected to the low voltage output of the first voltage line X2 and is pulled down by the low voltage, and the common voltage is compensated to maintain a stable potential.

[0071] Specifically, the common voltage adjustment unit 00 includes a voltage pull-down module L1 and a voltage pull-up module L2. The voltage pull-down module L1 includes a first transistor J1 and a second transistor J2, and the voltage pull-up module L2 includes a first element Y1 and a third transistor J3. When crosstalk occurs in the image to be displayed on the display panel 100, it indicates that the common voltage needs to be compensated. In step S3, when the actual voltage of the common voltage terminal V1 is less than the threshold voltage of the transistors in the common voltage adjustment unit 00, the first transistor J1 and the second transistor J2 in the voltage pull-down module L1 are turned off, and the first element Y1 in the voltage pull-up module L2 is turned on by the high voltage output from the second voltage terminal V3 of the second voltage line X3. The gate J32 of the third transistor J3 is connected to the second terminal Y12 of the first element Y1, and the third transistor J3 is turned on. At this time, the common voltage is connected to the high voltage output from the second voltage line X3 and is pulled up to a stable potential by the high voltage output from the second voltage line X3. In step S3, when the actual voltage of the common voltage terminal V1 is greater than the threshold voltage of the transistor in the common voltage adjustment unit 00, the first transistor J1 and the second transistor J2 in the voltage pull-down module L1 are turned on, and the first element Y1 in the voltage pull-up module L2 is turned on by the high voltage output from the second voltage terminal V3 of the second voltage line X3. The gate J32 of the third transistor J3 is connected to the second terminal Y12 of the first element Y1, and the gate J32 of the third transistor J3 is connected to the second terminal Y23 of the second transistor J2. Under certain conditions, the third transistor J3 is turned off. At this time, the common voltage is connected to the low voltage output from the first voltage line X2 and is pulled down to a stable potential by the low voltage output from the first voltage line X2. In this way, the turn-on or turn-off of the transistor in the common voltage adjustment unit 00 can be controlled according to the actual voltage output from the common voltage line X1, and the common voltage of the display panel 100 can be adjusted in real time to keep it in a stable state and avoid display defects.

[0072] Please continue to refer to this. Figures 1 to 7 This application provides a method for real-time adjustment of the common voltage of a display panel 100. When the common voltage needs to be compensated and the common voltage is greater than the threshold voltage of the transistor, the current output from the second transistor J2 to the third transistor J3 is greater than the current output from the first element Y1 to the third transistor J3.

[0073] Specifically, when compensation is needed because the actual voltage of the common voltage terminal V1 is greater than the preset voltage value of the common voltage terminal V1, the actual voltage of the common voltage terminal V1 is greater than the threshold voltage in the common voltage adjustment unit 00. Therefore, the voltage pull-down module L1 in the common voltage adjustment unit 00 needs to pull the actual voltage of the common voltage terminal V1 down to a stable potential. At this time, the first transistor J1 and the second transistor J2 in the voltage pull-down module L1 are turned on under the actual voltage output of the common voltage terminal V1, the first element Y1 is turned on under the high voltage output of the second voltage terminal V3, and the gate J32 of the third transistor J3 is connected to the second terminal Y12 of the first element Y1. The second terminals J2 and J23 of the two transistors J2 are connected. When the current output from the second transistor J2 to the third transistor J3 is greater than the current output from the first element Y1 to the third transistor J3, the second transistor J2 can gain the upper hand in the competition with the first element Y1, pulling down the gate voltage Y32 of the third transistor J3 and turning off the third transistor J3. Thus, when the common voltage is greater than the threshold voltage of the transistor, by setting the current output from the second transistor J2 to the third transistor J3 to be greater than the current output from the first element Y1 to the third transistor J3, the third transistor J3 can be turned off, so that only the voltage pull-down module L1 in the common voltage regulation unit 00 is turned on, pulling the common voltage down to a stable potential.

[0074] Based on the same inventive concept, this application also provides a display device 200, including the display panel 100 as described above. Please refer to... Figure 8 , Figure 8 The diagram shown is a structural schematic of a display device provided in an embodiment of the present invention. The display device 200 provided in this embodiment includes the display panel 100 provided in any of the above embodiments of this application.

[0075] It is understood that the display device 200 provided in the embodiments of the present invention can be a computer, mobile phone, tablet, or other display device with display function, and the present invention does not impose specific limitations on it. The display device 200 provided in the embodiments of the present invention has the beneficial effects of the display panel 100 provided in the embodiments of the present invention. For details, please refer to the specific description of the display panel 100 in the above embodiments, which will not be repeated here.

[0076] In summary, the common voltage regulation unit and method, display panel, and display device provided in this application achieve at least the following beneficial effects: by setting a common voltage regulation unit with a voltage pull-up module and a voltage pull-down module, the common voltage can be maintained at a stable potential, improving the uniformity and stability of the common voltage within the display area and reducing crosstalk; by setting a voltage pull-down module with a first transistor and a second transistor, crosstalk caused by a high common voltage can be improved; by setting a voltage pull-up module with a first element and a third transistor, crosstalk caused by a low common voltage can be improved; the first element in the voltage pull-up module can be a fourth transistor or a... A capacitor or resistor, through a specific connection between the fourth transistor, capacitor, or resistor and the third transistor, can pull the low common voltage to a stable potential, reducing crosstalk on the display panel. The threshold voltage of the transistor in the common voltage adjustment unit is set to be equal to the preset value of the common voltage terminal. When the actual voltage at the common voltage terminal deviates from the preset value, the actual voltage at the common voltage terminal can be adjusted to a stable potential by turning on or off the transistors in the voltage pull-down and voltage pull-up modules of the common voltage adjustment unit. The transistors in the voltage pull-up and voltage pull-down modules can be simultaneously configured as P-type transistors or simultaneously as N-type transistors, which can adjust the common voltage terminal to a stable potential when the voltage deviates from the preset value. When the actual voltage at the voltage terminal deviates from the preset value, ensure that either the voltage pull-down module or the voltage pull-up module in the common voltage adjustment unit is turned on to adjust the actual voltage at the common voltage terminal to a stable potential. By placing the common voltage adjustment unit in the non-display area of ​​the display panel, the common voltage adjustment unit can be hidden, thus not occupying display area space. If the voltage output from the first voltage line is lower than the preset value of the common voltage terminal of the display panel, and the voltage output from the second voltage line is higher than the preset value of the common voltage terminal of the display panel, regardless of whether the actual voltage output from the common voltage terminal is too high or too low, it can be pulled back to a stable potential. The common voltage adjustment unit is only placed in the first and second non-display areas. The intersection of the zones allows for adjustment of the common voltage without encroaching on the width of the first and second non-display zones, further narrowing the bezel of the display panel. The transistors in the common voltage adjustment unit are switched on or off based on the actual voltage output from the common voltage line, thus adjusting the common voltage of the display panel in real time to maintain a stable state and prevent display defects. When the common voltage exceeds the threshold voltage of the transistors, the third transistor is switched off by setting the current output from the second transistor to the third transistor to be greater than the current output from the first element to the third transistor. This ensures that only the voltage pull-down module in the common voltage adjustment unit is turned on, pulling the common voltage down to a stable potential.

[0077] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A common voltage regulation unit, characterized by, The voltage pull-down module and the voltage pull-up module are connected to a common voltage terminal; The voltage pull-down module comprises a first transistor and a second transistor, the first poles of the first transistor and the second transistor are connected to an input terminal of the voltage pull-down module, the gates and the second poles of the first transistor and the gate of the second transistor are connected to an output terminal of the voltage pull-down module, and the second pole of the second transistor is connected to a first node; The voltage pull-up module comprises a first element and a third transistor, the first end of the first element and the first pole of the third transistor are connected to an input terminal of the voltage pull-up module, the second pole of the third transistor is connected to an output terminal of the voltage pull-up module, and the second end of the first element is connected to the first node; The input terminal of the voltage pull-down module is connected to a first voltage terminal, the input terminal of the voltage pull-up module is connected to a second voltage terminal, and the voltage pull-down module and the voltage pull-up module are selectively turned on; when the signal of the common voltage terminal is higher than a preset value, the voltage pull-down module is used to pull down the signal of the common voltage terminal to a stable potential; when the signal of the common voltage terminal is lower than the preset value, the voltage pull-up module is used to pull up the signal of the common voltage terminal to the stable potential. The first element is a fourth transistor, the gate and the second pole of the fourth transistor and the first pole of the third transistor are connected to the input terminal of the voltage pull-up module, the second pole of the third transistor is connected to the output terminal of the voltage pull-up module, and the first pole of the fourth transistor and the gate of the third transistor are connected to the first node.

2. The common voltage regulation unit of claim 1, wherein, The first element is a capacitor or a resistor.

3. The common voltage regulation unit of claim 1, wherein, The voltage pull-up module and the voltage pull-down module each comprise at least one transistor, and the threshold voltage of each transistor is equal to the preset value of the voltage of the common voltage terminal.

4. The common voltage regulation unit of claim 1, wherein, The transistors in the voltage pull-up module and the voltage pull-down module are all P-type transistors or all N-type transistors.

5. The common voltage regulation unit of claim 4, wherein, The display panel comprises at least one voltage regulating unit as claimed in any one of claims 1 to 5, and the voltage regulating unit is located in a non-display area of the display panel, and the non-display area comprises a first voltage line and a second voltage line; 6. A display panel, characterized by, The input terminal of the voltage pull-down module is connected to a first voltage terminal of the first voltage line, and the output terminal of the voltage pull-down module is connected to a common voltage terminal of a common voltage line; The input terminal of the voltage pull-up module is connected to a second voltage terminal of the second voltage line, and the output terminal of the voltage pull-up module is connected to the common voltage terminal of the common voltage line. The first voltage line is arranged around the display area; 7. The display panel of claim 6, wherein, The second voltage line is arranged around the first voltage line; The voltage output by the first voltage line is lower than the preset value of the common voltage terminal of the display panel, and the voltage output by the second voltage line is higher than the preset value of the common voltage terminal of the display panel. The non-display area of the display panel comprises a first non-display area extending in a first direction and a second non-display area extending in a second direction, and the first direction and the second direction intersect.

8. The display panel of claim 6, wherein, ​ The voltage regulating units are arranged in an array in the first non-display area and the second non-display area, or the voltage regulating units are located at the intersection of the first non-display area and the second non-display area.

9. A method for real-time adjustment of common voltage of a display panel, characterized in that, The display panel is applied to any one of claims 6-8, comprising the following steps: S1: the common voltage line generates a common voltage input to the display area; S2: monitor the crosstalk phenomenon of the display panel to be displayed, and determine whether the common voltage needs to be compensated; S3: when the common voltage needs to be compensated, the common voltage is compensated under the adjustment of the common voltage regulating unit.

10. The method of claim 9, wherein the common voltage is adjusted in real time. The common voltage regulating unit comprises a first transistor, a second transistor, a first element and a third transistor; In the S3, When the common voltage needs to be compensated, and the common voltage is less than the threshold voltage of the transistor in the common voltage regulating unit, the first transistor and the second transistor are cut off, the first element is controlled to be opened by the high voltage output by the second voltage line, the third transistor is turned on, the common voltage is connected with the high voltage output by the second voltage line, and is pulled high by the high voltage, and the common voltage is compensated to keep a stable potential; When the common voltage needs to be compensated, and the common voltage is greater than the threshold voltage of the transistor in the common voltage regulating unit, the first transistor and the second transistor are turned on, the first element is controlled to be opened by the high voltage output by the second voltage line, the third transistor is cut off, the common voltage is connected with the low voltage output by the first voltage line, and is pulled low by the low voltage, and the common voltage is compensated to keep a stable potential.

11. The method of claim 10, wherein the common voltage is adjusted in real time. When the common voltage needs to be compensated, and the common voltage is greater than the threshold voltage of the transistor, the current output from the second transistor to the third transistor is greater than the current output from the first element to the third transistor.

12. A display device, characterized by comprising: The display panel comprises any one of claims 6 to 8.

Images