Voltage compensation circuit, display device, and display control method

Abstract

The application provides a voltage compensation circuit, a display device and a display control method. The voltage compensation circuit comprises a control module, a compensation module and a selection module. The control module generates a selection control signal according to image data of a to-be-displayed picture, and the selection control signal has a first level state when the image data corresponds to a heavy-load display picture. The selection module controls the time when a feedback voltage signal accesses the compensation module according to the selection control signal. When the to-be-displayed picture is a heavy-load display picture, the selection module controls the feedback voltage signal not to access the compensation module according to the first level state of the selection control signal, so that the compensation module does not compensate the first common voltage signal, thereby improving the problem that the voltage compensation circuit has a high temperature when the display panel displays a heavy-load picture, which causes the display panel to be unable to be normally used.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a voltage compensation circuit, a display device, and a display control method. Background Technology

[0002] Due to factors such as manufacturing processes and layout space, parasitic capacitance inevitably exists between data lines and common voltage traces in a display panel. Voltage transitions in the data signals transmitted via these lines are coupled to the common voltage through these parasitic capacitances, causing changes in the common voltage. Since different data lines have different voltage transition values, the resulting changes in the common voltage caused by parasitic capacitance coupling also differ. Consequently, the common voltage of different parts of the display panel will be affected differently by the corresponding data signal transitions and parasitic capacitance coupling, leading to crosstalk issues such as uneven brightness in the displayed image.

[0003] Operational amplifiers can be used to compensate for common voltage. However, when displaying heavy content on the display panel, using operational amplifiers to compensate for common voltage can lead to overheating, affecting the normal operation of the display product. Summary of the Invention

[0004] This invention provides a voltage compensation circuit, a display device, and a display control method, which helps to improve the problem that the voltage compensation circuit overheats when the display panel displays heavy images, causing the display panel to malfunction.

[0005] This invention provides a voltage compensation circuit applied in a display panel. The voltage compensation circuit includes a control module, a compensation module, and a selection module. The control module is configured to generate a selection control signal based on image data corresponding to the screen to be displayed on the display panel. The compensation module is electrically connected to the display panel and is configured to receive a first common voltage signal and a feedback voltage signal corresponding to the common voltage signal within the display panel, and generate a second common voltage signal to output to the display panel. The selection module is electrically connected to the control module and the compensation module and is configured to control the timing of the compensation module receiving the feedback voltage signal according to the selection control signal. Specifically, the selection control signal has a first level state when the image data corresponds to the overloaded display screen, and the selection module is configured to control the compensation module not to receive the feedback voltage signal according to the selection control signal having the first level state.

[0006] In some embodiments, the selection module includes a switching transistor, the control terminal of which is configured to receive the selection control signal, the input terminal of which is configured to receive the feedback voltage signal, and the output terminal of which is electrically connected to the compensation module through a first node.

[0007] In some embodiments, the compensation module includes an operational amplifier, the non-inverting input of which is configured to receive the first common voltage signal, the inverting input of which is electrically connected to the first node, and the output of which is electrically connected to the inverting input of which is also electrically connected to the display panel.

[0008] In some embodiments, the compensation module further includes a first resistor and a second resistor. A first terminal of the first resistor is electrically connected to the inverting input terminal of the operational amplifier, and a second terminal of the first resistor is electrically connected to the output terminal of the switching transistor. A first terminal of the second resistor is electrically connected to the inverting input terminal of the operational amplifier, and a second terminal of the second resistor is electrically connected to the output terminal of the operational amplifier.

[0009] In some embodiments, the display panel includes a common voltage signal line and a feedback voltage signal line electrically connected to the common voltage signal line. The feedback voltage signal corresponds to the common voltage signal transmitted on the common voltage signal line electrically connected to the feedback voltage signal line.

[0010] In some embodiments, the voltage compensation circuit further includes a power generation module electrically connected to the compensation module and configured to generate the first common voltage signal for output to the compensation module.

[0011] In some embodiments, the control module includes a detection unit and a signal output unit. The detection unit is configured to receive image data corresponding to the screen to be displayed, to detect whether the screen to be displayed corresponds to a heavy-load display screen or a light-load display screen. The signal output unit is electrically connected to the detection unit and the selection module, and is configured to control the generated selection control signal to have a first level state when the detection unit detects that the screen to be displayed is the heavy-load display screen; and is configured to control the generated selection control signal to have a second level state when the detection unit detects that the screen to be displayed is the light-load display screen. The selection module is configured to control the compensation module to access the feedback voltage signal according to the selection control signal having the second level state.

[0012] Embodiments of the present invention also provide a display device, including a display panel and any of the above-described voltage compensation circuits, wherein the voltage compensation circuit is electrically connected to the display panel.

[0013] Embodiments of the present invention also provide a display control method for a display panel, employing any of the voltage compensation circuits described above, wherein the display control method includes:

[0014] A selection control signal is generated based on the image data corresponding to the screen to be displayed on the display panel; wherein, when the image data corresponds to a reloaded display screen, the selection control signal has a first level state.

[0015] According to the selection control signal having the first level state, the compensation module is controlled not to connect to the feedback voltage signal, so as to control the second common voltage signal output by the compensation module to the display panel to be the first common voltage signal.

[0016] In some embodiments, when the image data corresponds to a lightly loaded display screen, the selection control signal corresponds to a second level state; the display control method further includes: controlling the compensation module to access the feedback voltage signal according to the selection control signal having the second level state, so as to control the compensation module to compensate the first common voltage signal according to the feedback voltage signal, so as to output the second common voltage signal to the display panel.

[0017] This invention provides a voltage compensation circuit, a display device, and a display control method. The voltage compensation circuit includes a control module, a compensation module, and a selection module. The control module generates a selection control signal based on image data of the screen to be displayed, and sets the selection control signal to a first-level state when the image data corresponds to a heavily loaded display screen. The selection module controls the timing of the feedback voltage signal's connection to the compensation module based on the selection control signal. When the screen to be displayed is a heavily loaded display screen, the selection module, based on the selection control signal at the first-level state, controls the feedback voltage signal not to be connected to the compensation module, preventing the compensation module from compensating for the first common voltage signal. This improves the problem of excessive temperature in the voltage compensation circuit when the display panel displays a heavily loaded screen, which could cause the display panel to malfunction. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a schematic block diagram of the voltage compensation circuit provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the voltage compensation circuit provided in an embodiment of the present invention;

[0021] Figure 3 This is a timing diagram of the selection control signal provided in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the display device provided in an embodiment of the present invention;

[0023] Figures 5A to 5C This is a flowchart of the display control method provided in an embodiment of the present invention. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0025] Specifically, Figure 1 This is a schematic block diagram of the voltage compensation circuit provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the voltage compensation circuit provided in an embodiment of the present invention. Figure 3 This is a timing diagram of the selection control signal provided in an embodiment of the present invention.

[0026] This invention provides a voltage compensation circuit 10, applied in a display panel 20. The display panel 20 includes a passive light-emitting display panel 20 (such as a liquid crystal display panel).

[0027] Please continue reading. Figure 1 The voltage compensation circuit 10 includes a control module 101, a compensation module 102, and a selection module 103.

[0028] The control module 101 is configured to generate a selection control signal SC based on the image data corresponding to the screen to be displayed on the display panel 20. The selection control signal SC has a first level state ELS1 when the image data corresponds to a heavily loaded display screen, and a second level state ELS2 when the image data corresponds to a lightly loaded display screen, such as... Figure 3 As shown.

[0029] Please continue reading. Figure 1 The compensation module 102 is electrically connected to the display panel 20. The compensation module 102 is configured to receive a first common voltage signal Vb and a feedback voltage signal Vf corresponding to the common voltage signal in the display panel 20, and generate a second common voltage signal Vc to output to the display panel 20.

[0030] The selection module 103 is electrically connected to the control module 101 and the compensation module 102. The selection module 103 is configured to control the timing of the compensation module 102 receiving the feedback voltage signal Vf according to the selection control signal SC. That is, the selection module 103 is configured to control the compensation module 102 not to connect to the feedback voltage signal Vf according to the selection control signal SC having the first level state ELS1, and to control the compensation module 102 to connect to the feedback voltage signal Vf according to the selection control signal SC having the second level state ELS2.

[0031] By setting the selection module 103, when the screen to be displayed is a heavy-load display screen, the feedback voltage signal Vf is controlled not to be connected to the compensation module 102, so that the compensation module 102 does not compensate for the first common voltage signal Vb, thereby reducing the power consumption of the voltage compensation circuit 10 and improving the problem that the voltage compensation circuit 10 has an excessively high temperature when the display panel 20 displays a heavy-load screen, causing the display panel 20 to malfunction.

[0032] It should be noted that the image data can represent the display grayscale of each sub-pixel within the display panel 20 corresponding to the image to be displayed. Optionally, the image data can be represented by a digital signal. That is, taking the display panel 20 as an example that can achieve 256 grayscale display, the image data can be represented by an 8-bit binary number to represent the display grayscale of each sub-pixel. The control module 101 determines whether there is a large grayscale jump in the image to be displayed based on the display grayscale of each sub-pixel represented by the image data, and then determines whether the image to be displayed is a heavily loaded or lightly loaded display, thereby controlling the level state of the selection control signal SC. For example, when there is a large grayscale jump in the image to be displayed, the image to be displayed is determined to be a heavily loaded display; when there is no large grayscale jump in the image to be displayed, the image to be displayed is determined to be a lightly loaded display. When the displayed grayscale value jumps from one grayscale value (e.g., L1) to another grayscale value (e.g., L2), and the absolute value of the difference between L1 and L2 is greater than or equal to A, the displayed image exhibits a large grayscale jump. Conversely, when the absolute value of the difference between L1 and L2 is less than A, the grayscale jump is smaller. A can be determined based on actual debugging conditions. For example, when L1 = 48 and L2 = 255, a large grayscale jump exists. When L1 = 200 and L2 = 255, a smaller grayscale jump occurs.

[0033] It should be noted that the feedback voltage signal Vf can reflect the coupling status of the common voltage signal within the display panel 20.

[0034] Understandably, different driving architectures (e.g., one gate line, one data line (1G1D) driving architecture, three gate lines, one data line (Tri-Gate) driving architecture, etc.) correspond to different heavy-duty display screens.

[0035] Optionally, the image data corresponding to the screen to be displayed can be provided to the control module 101 by a signal source.

[0036] Since transistors have a switching function, the design of the selection module 103 to control whether the feedback voltage signal Vf is connected to or not connected to the compensation module 102 can be implemented in the form of transistors.

[0037] Please continue reading. Figure 2The selection module 103 includes a switching transistor Ts. The control terminal of the switching transistor Ts is configured to receive the selection control signal SC. The input terminal of the switching transistor Ts is configured to receive the feedback voltage signal Vf. The output terminal of the switching transistor Ts is electrically connected to the compensation module 102 through the first node N1.

[0038] Optionally, the switching transistor Ts can be one of a metal-oxide-semiconductor field-effect transistor, a thin-film transistor, etc.

[0039] Optionally, the switching transistor Ts is an N-type transistor, and the selection control signal SC has a voltage corresponding to the first level state ELS1 that is less than, and the selection control signal SC has a voltage corresponding to the second level state ELS2 that is less than, for example, Figure 3 As shown in timing a, when the screen to be displayed is the heavy-load display screen, the switching transistor Ts is turned off, thereby preventing the feedback voltage signal Vf from being connected to the compensation module 102. When the screen to be displayed is the light-load display screen, the switching transistor Ts is turned on, thereby connecting the feedback voltage signal Vf to the compensation module 102.

[0040] Similarly, the switching transistor Ts is a P-type transistor, and the selection control signal SC has a voltage corresponding to the first level state ELS1 that is greater than the voltage corresponding to the second level state ELS2 that is also greater than the voltage corresponding to the first level state ELS1. Figure 3 As shown in timing b, when the screen to be displayed is the heavy-load display screen, the feedback voltage signal Vf is not connected to the compensation module 102; while when the screen to be displayed is the light-load display screen, the feedback voltage signal Vf is connected to the compensation module 102.

[0041] It is understandable that the design of the selection module 103 controlling the feedback voltage signal Vf to be connected to or not connected to the compensation module 102 can also be implemented using other switching devices.

[0042] To ensure that the display panel 20 can still receive the required common voltage signal when the feedback voltage signal Vf is not connected to the compensation module 102, without increasing device cost, the compensation module 102 can include an operational amplifier OP to control the compensation module 102 to have different output voltages when the feedback voltage signal Vf is connected or not connected.

[0043] Please continue reading. Figure 2The compensation module 102 includes an operational amplifier OP. The non-inverting input of the operational amplifier OP is configured to receive the first common voltage signal Vb. The inverting input of the operational amplifier OP is electrically connected to the first node N1. The output of the operational amplifier OP is electrically connected to the inverting input of the operational amplifier OP and the display panel 20.

[0044] When the selection module 103 controls the feedback voltage signal Vf not to be connected to the compensation module 102 according to the selection control signal SC having the first level state ELS1, the operational amplifier OP essentially constitutes a voltage follower, so that the second common voltage signal Vc output by the compensation module 102 is equal to the first common voltage signal Vb. When the selection module 103 controls the feedback voltage signal Vf to be connected to the compensation module 102 according to the selection control signal SC having the second level state ELS2, the second common voltage signal Vc output by the compensation module 102 is the signal after compensating the first common voltage signal Vb according to the feedback voltage signal Vf.

[0045] Alternatively, please continue reading Figure 2 In some embodiments, the compensation module 102 further includes a first resistor R1 and a second resistor R2.

[0046] The first end of the first resistor R1 is electrically connected to the inverting input terminal of the operational amplifier OP, and the second end of the first resistor R1 is electrically connected to the output terminal of the switching transistor Ts. The first end of the second resistor R2 is electrically connected to the inverting input terminal of the operational amplifier OP, and the second end of the second resistor R2 is electrically connected to the output terminal of the operational amplifier OP.

[0047] Optionally, the feedback voltage signal Vf can be obtained directly from the common voltage signal within the display panel 20. Please continue reading... Figure 2 The display panel 20 includes a common voltage signal line Lvc and a feedback voltage signal line Lvf electrically connected to the common voltage signal line Lvc. The feedback voltage signal Lvf corresponds to the common voltage signal transmitted by the common voltage signal line Lvc, which is electrically connected to the feedback voltage signal line Lvf.

[0048] Please continue reading. Figure 2The display panel 20 includes a common electrode EC, multiple pixel electrodes (not shown in the figure), and multiple sub-pixels SPi. The common voltage signal line Lvc is electrically connected to the common electrode EC. The multiple pixel electrodes are electrically connected to multiple data lines (not shown in the figure) for transmitting data signals. The liquid crystal molecules (not shown in the figure) of the sub-pixels SPi are deflected at an angle controlled by the voltage difference between the pixel electrodes and the common electrode EC, so that the sub-pixels SPi cooperate with backlight control to realize the display function. The common electrode EC can be arranged as a whole or divided into multiple electrodes arranged in an array.

[0049] Understandably, when multiple common electrodes EC are arranged in an array, there are multiple common voltage signal lines Lvc, and the feedback voltage signal line Lvf can be electrically connected to one of the common voltage signal lines Lvc. Optionally, the voltage compensation circuit 10 is located on one side of the display panel 20, and the feedback voltage signal line Lvf is electrically connected to a common voltage signal line Lvc located away from the voltage compensation circuit 10, so that information such as the degree of voltage reduction exhibited by the common voltage signal within the display panel 20 can be reflected through the feedback voltage signal Vf.

[0050] Alternatively, the feedback voltage signal Vf can be obtained by referring to the design of the feedback module in related technologies, which will not be elaborated here.

[0051] Please continue reading. Figures 1-2 The voltage compensation circuit 10 may further include a power generation module 104, which is electrically connected to the compensation module 102. The power generation module 104 is configured to generate the first common voltage signal Vb and output it to the compensation module 102.

[0052] It should be noted that the first common voltage signal Vb can be the reference common voltage signal used by the display panel 20.

[0053] Optionally, the power generation module 104 can be a power management driver chip, and the first common voltage signal Vb can be output by an output pin of the power management driver chip.

[0054] Please continue reading. Figure 2 The control module 101 includes a detection unit 1011 and a signal output unit 1012.

[0055] The detection unit 1011 is configured to receive the image data corresponding to the screen to be displayed, so as to detect that the screen to be displayed corresponds to one of the heavy-load display screen and the light-load display screen.

[0056] The signal output unit 1012 is electrically connected to the detection unit 1011 and the selection module 103. The signal output unit 1012 is configured to control the generated selection control signal SC to have a first level state ELS1 when the detection unit 1011 detects that the screen to be displayed is the heavy-load display screen; and is configured to control the generated selection control signal SC to have a second level state ELS2 when the detection unit 1011 detects that the screen to be displayed is the light-load display screen.

[0057] Optionally, after detecting that the screen to be displayed corresponds to the heavy-load display screen, the detection unit 1011 generates a first control signal. After detecting that the screen to be displayed corresponds to the light-load display screen, the detection unit 1011 generates a second control signal. The signal output unit 1012 controls the generated selection control signal SC to have a first level state ELS1 according to the first control signal, and the signal output unit 1012 controls the generated selection control signal SC to have a second level state ELS2 according to the second control signal.

[0058] Optionally, the signal output unit 1012 includes a first transistor and a second transistor. The control terminal of the first transistor is configured to receive the first control signal. The input terminal of the first transistor is electrically connected to a first voltage terminal, and the output terminal of the first transistor is electrically connected to the selection module 103. The control terminal of the second transistor is configured to receive the second control signal. The input terminal of the second transistor is electrically connected to a second voltage terminal, and the output terminal of the second transistor is electrically connected to the selection module 103, so that when the first transistor is turned on, the voltage supplied by the first voltage terminal causes the selection control signal SC to have the first level state ELS1; when the second transistor is turned on, the voltage supplied by the second voltage terminal causes the selection control signal SC to have the second level state ELS2. The voltage supplied by the first voltage terminal is different from the voltage supplied by the second voltage terminal, that is, the voltage supplied by the first voltage terminal is either greater than or less than the voltage supplied by the second voltage terminal.

[0059] Optionally, the power generation module 104 can serve as both the first voltage terminal and the second voltage terminal. If the power generation module 104 is a power management driver chip, the first voltage terminal and the second voltage terminal correspond to the two output pins of the power management driver chip.

[0060] Optionally, in some embodiments, the first transistor and the second transistor may also be controlled by the same control signal, wherein the first transistor is one of a P-type transistor and an N-type transistor, and the second transistor is the other of a P-type transistor and an N-type transistor.

[0061] Optionally, the control module 101 includes at least one of a timing controller, a central processing unit, a microcontroller, etc.

[0062] Optionally, the control module 101 is a timing controller. Utilizing a pattern detection module that implements the pattern detection function (PDF), the timing controller detects whether the screen to be displayed is a heavily loaded or lightly loaded screen. Then, it outputs the selection control signal SC through the general-purpose input / output port of the timing controller. That is, the timing controller with pattern detection function detects whether the screen to be displayed is a heavily loaded or lightly loaded screen. When the screen to be displayed is detected to be a heavily loaded screen, the selection control signal SC output from the general-purpose input / output port of the timing controller has the first level state ELS1. When the screen to be displayed is detected to be a lightly loaded screen, the selection control signal SC output from the general-purpose input / output port of the timing controller has the second level state ELS2. The timing controller can control whether the compensation module 102 is connected to the feedback voltage signal Vf, thereby controlling whether to compensate the first common voltage signal Vb. When the voltage compensation circuit 10 is applied to the display panel 20, it helps to reduce the number of control devices used in the display panel 20 and reduce costs.

[0063] Figure 4 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. The embodiment of the present invention also provides a display device, including a display panel 20 and any of the above-mentioned voltage compensation circuits 10, wherein the voltage compensation circuit 10 is electrically connected to the display panel 20.

[0064] Optionally, the voltage compensation circuit 10 can be integrated on a circuit board, which is electrically connected to the display panel 20 via a flexible circuit board or other devices.

[0065] Figures 5A-5C This is a flowchart of a display control method provided in an embodiment of the present invention. An embodiment of the present invention also provides a display control method for a display panel 20, which applies any of the voltage compensation circuits 10 described above.

[0066] Please continue reading. Figure 5A The display control method includes:

[0067] Step S10: Generate a selection control signal SC based on the image data corresponding to the screen to be displayed on the display panel 20;

[0068] Step S20: Based on the level state of the selection control signal SC, control the timing of the feedback voltage signal Vf being connected to the compensation module 102, so as to control the voltage of the second common voltage signal Vc output by the compensation module 102 to the display panel 20.

[0069] For details, please continue reading Figure 5B The display control method includes:

[0070] Step S10: Generate a selection control signal SC based on the image data corresponding to the screen to be displayed on the display panel 20; wherein, when the image data corresponds to a reloaded display screen, the selection control signal SC corresponds to a first level state ELS1;

[0071] Step S201: According to the selection control signal SC with the first level state ELS1, control the compensation module 102 not to connect to the feedback voltage signal Vf, so as to control the second common voltage signal Vc output by the compensation module 102 to the display panel 20 to be the first common voltage signal Vb.

[0072] When the screen to be displayed corresponds to a heavy-load display screen, the feedback voltage signal Vf is controlled not to be connected to the compensation module 102, so that the compensation module 102 does not compensate for the first common voltage signal Vb, but outputs it as the second common voltage signal Vc to the display panel 20. This can reduce the power consumption of the voltage compensation circuit 10 and improve the problem that the voltage compensation circuit 10 has an excessively high temperature when the display panel 20 displays a heavy-load screen, which causes the display panel 20 to malfunction.

[0073] Accordingly, please continue reading Figure 5B When the image data corresponds to a lightly loaded display screen, the selection control signal SC corresponds to a second-level state ELS2. The display control method further includes:

[0074] Step S202: Control the compensation module 102 to access the feedback voltage signal Vf according to the selection control signal SC with the second level state ELS2, so as to control the compensation module 102 to compensate the first common voltage signal Vb according to the feedback voltage signal Vf, so as to output the second common voltage signal Vc to the display panel 20.

[0075] When the screen to be displayed corresponds to a light-load display screen, the feedback voltage signal Vf is controlled to be connected to the compensation module 102, so that the compensation module 102 compensates the first common voltage signal Vb and outputs the second common voltage signal Vc to the display panel 20 to reduce the impact of coupling on the display screen.

[0076] The control module 101 executes step S10, and the selection module 103 performs the operation of controlling whether the feedback voltage signal Vf is connected to or not connected to the compensation module 102.

[0077] Alternatively, please continue reading Figure 5C The step of generating the selection control signal SC based on the image data corresponding to the screen to be displayed on the display panel 20 includes:

[0078] Step S101: Receive the image data corresponding to the screen to be displayed;

[0079] Step S102: Determine whether the screen to be displayed is a reloaded display screen based on the image data corresponding to the screen to be displayed;

[0080] Step S1031: When it is determined that the screen to be displayed is a reloaded display screen, the generated selection control signal SC is controlled to have the first level state ELS1;

[0081] Step S1032: When it is determined that the screen to be displayed is a light-load display screen, the generated selection control signal SC is controlled to have the second level state ELS2.

[0082] That is, the image data corresponding to the screen to be displayed is used to determine whether the screen to be displayed is a heavily loaded screen or a lightly loaded screen, so as to control the level state of the selection control signal SC.

[0083] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A voltage compensation circuit, characterized in that, The voltage compensation circuit, used in a display panel, includes: The control module is configured to generate a selection control signal based on the image data corresponding to the screen to be displayed on the display panel; A compensation module, electrically connected to the display panel, is configured to receive a first common voltage signal and a feedback voltage signal corresponding to the common voltage signal within the display panel, and generate a second common voltage signal for output to the display panel. The compensation module includes an operational amplifier; and The selection module is electrically connected to the control module and the compensation module, and is configured to control the timing of the compensation module receiving the feedback voltage signal according to the selection control signal; Wherein, the selection control signal has a first level state when the image data corresponds to the overloaded display screen, and the selection module is configured to control the inverting input terminal of the operational amplifier in the compensation module not to be connected to the feedback voltage signal according to the selection control signal having the first level state, and the operational amplifier constitutes a voltage follower under the overloaded display screen.

2. The voltage compensation circuit according to claim 1, characterized in that, The selection module includes: A switching transistor, wherein the control terminal of the switching transistor is configured to receive the selection control signal, the input terminal of the switching transistor is configured to receive the feedback voltage signal, and the output terminal of the switching transistor is electrically connected to the compensation module through a first node.

3. The voltage compensation circuit according to claim 2, characterized in that, The non-inverting input of the operational amplifier is configured to receive the first common voltage signal, the inverting input of the operational amplifier is electrically connected to the first node, and the output of the operational amplifier is electrically connected to the inverting input of the operational amplifier and the display panel.

4. The voltage compensation circuit according to claim 3, characterized in that, The compensation module also includes: A first resistor, the first end of which is electrically connected to the inverting input terminal of the operational amplifier, and the second end of which is electrically connected to the output terminal of the switching transistor; and The second resistor has its first end electrically connected to the inverting input terminal of the operational amplifier, and its second end electrically connected to the output terminal of the operational amplifier.

5. The voltage compensation circuit according to claim 1, characterized in that, The display panel includes a common voltage signal line and a feedback voltage signal line electrically connected to the common voltage signal line; The feedback voltage signal corresponds to the common voltage signal transmitted by the common voltage signal line electrically connected to the feedback voltage signal line.

6. The voltage compensation circuit according to claim 1, characterized in that, Also includes: A power generation module, electrically connected to the compensation module, is configured to generate the first common voltage signal for output to the compensation module.

7. The voltage compensation circuit according to claim 1, characterized in that, The control module includes: The detection unit is configured to receive the image data corresponding to the screen to be displayed, so as to detect that the screen to be displayed corresponds to one of the heavy-load display screen and the light-load display screen; A signal output unit, electrically connected to the detection unit and the selection module, is configured to control the generated selection control signal to have a first level state when the detection unit detects that the screen to be displayed is the heavy-load display screen; and is configured to control the generated selection control signal to have a second level state when the detection unit detects that the screen to be displayed is the light-load display screen. The selection module is configured to control the compensation module to access the feedback voltage signal according to the selection control signal having the second level state.

8. A display device, characterized in that, include: Display panel; as well as The voltage compensation circuit as described in any one of claims 1 to 7, wherein the voltage compensation circuit is electrically connected to the display panel.

9. A display control method for a display panel, characterized in that, The display control method, using the voltage compensation circuit according to any one of claims 1 to 7, comprises: A selection control signal is generated based on the image data corresponding to the screen to be displayed on the display panel; wherein, when the image data corresponds to a reloaded display screen, the selection control signal has a first level state. The compensation module is controlled to not connect to the feedback voltage signal according to the selection control signal having a first level state, so as to control the second common voltage signal output by the compensation module to the display panel to be the first common voltage signal.

10. The display control method according to claim 9, characterized in that, When the image data corresponds to a lightly loaded display screen, the selection control signal has a second level state. The display control method further includes: The selection control signal with a second level state controls the compensation module to access the feedback voltage signal, so as to control the compensation module to compensate the first common voltage signal according to the feedback voltage signal, so as to output the second common voltage signal to the display panel.

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