Polarity inversion signal control method, device and display device

Abstract

The present application provides a polarity reversal signal control method, device, and display device, relating to the field of display technology. The polarity reversal signal control method includes: outputting a polarity reversal signal of a first level at target duration intervals, wherein when the display device displays a normal image, the polarity reversal signal is at a second level, the first level being opposite to the second level; detecting the image of the display device; maintaining the output of the polarity reversal signal of the first level when the display device detects that the image is a special image; and outputting the polarity reversal signal of the second level when the display device detects that the image is a normal image. The technical solution provided by the present application can reduce lateral crosstalk caused by Vcom offset while also improving the screen flickering caused by the change in the polarity of the Source voltage.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a polarity inversion signal control method, device, and display device. Background Art

[0002] With the advancement of display technology, the display effects of display devices are getting better and better. However, when the display device displays special images such as V-1 line and Dot on off, the common voltage (Vcom) is easily offset due to panel characteristics, resulting in lateral crosstalk.

[0003] To address the above issues, source polarity compensation technology is currently commonly used. When a display device is detected to be displaying a special image, the polarity of the source voltage is changed to reduce the Vcom offset, thereby reducing the lateral crosstalk.

[0004] However, changing the polarity of the Source voltage will cause the brightness of the entire screen to change instantaneously, resulting in screen flicker. Summary of the Invention

[0005] In view of this, the present application provides a polarity inversion signal control method, device, and display device, which can reduce the lateral crosstalk caused by Vcom offset when the display device displays a special image, and at the same time improve the image flickering phenomenon caused by the polarity change of the Source voltage.

[0006] To achieve the above objectives, in a first aspect, an embodiment of the present application provides a polarity inversion signal control method, comprising:

[0007] outputting a polarity reversal signal of a first level every target duration, wherein when the display device displays a normal image, the polarity reversal signal is at a second level, and the first level is opposite to the second level;

[0008] detecting a picture of the display device;

[0009] When it is detected that the picture of the display device is a special picture, the polarity inversion signal of the first level is continuously outputted;

[0010] When it is detected that the picture of the display device is a normal picture, a polarity inversion signal of a second level is output.

[0011] As an optional implementation of the embodiment of the present application, a polarity inversion signal of a first level is output during the blanking time of a first picture frame at every target duration, and the picture of the display device is detected during the display of several second picture frames after the first picture frame.

[0012] As an optional implementation of the embodiment of the present application, when the polarity inversion signal is at the first level, the driving mode of the display device is 2-line inversion.

[0013] As an optional implementation of the embodiment of the present application, when the polarity inversion signal is at the second level, the driving mode of the display device is column inversion.

[0014] As an optional implementation of the embodiment of the present application, detecting the screen of the display device includes:

[0015] If it is detected that the number of adjacent sub-pixels, one bright and one dark, in the picture of the display device is greater than or equal to the target number, determining that the picture of the display device is a special picture;

[0016] If it is detected that the number of adjacent sub-pixels that are alternately bright and alternately dark in the image of the display device is less than a target number, it is determined that the image of the display device is a normal image.

[0017] As an optional implementation of the embodiment of the present application, the target duration is greater than or equal to the duration corresponding to the display device displaying 3 frames of images.

[0018] As an optional implementation of the embodiment of the present application, the first level is a high level and the second level is a low level.

[0019] In a second aspect, an embodiment of the present application provides a polarity inversion signal control device, comprising:

[0020] an output module, configured to output a polarity reversal signal of a first level every target duration, wherein when the display device displays a normal image, the polarity reversal signal is at a second level, and the first level is opposite to the second level;

[0021] A detection module, configured to detect an image on the display device;

[0022] a holding module, configured to keep outputting a polarity reversal signal of a first level when detecting that the picture of the display device is a special picture;

[0023] The output module is further configured to output a polarity inversion signal of a second level when it is detected that the picture of the display device is a normal picture.

[0024] In a third aspect, an embodiment of the present application provides a display device, comprising: a display panel and the polarity inversion signal control device as described in the second aspect above.

[0025] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the polarity inversion signal control method as described in the first aspect or any one of the first aspects is implemented.

[0026] The technical solution provided by the embodiment of the present application is to first output a polarity reversal signal of a first level at every target time duration, then detect the screen of the display device. If the screen of the display device is detected as a special screen, the polarity reversal signal of the first level is maintained; if the screen of the display device is detected as a normal screen, the polarity reversal signal of the second level is output. When the display device is displaying a normal screen, the polarity reversal signal is at the second level, and the first level is opposite to the second level. In the above technical solution, since the polarity reversal signal is at the second level when the display device is displaying a normal screen, the voltage polarity of the Source is reversed when the polarity reversal signal is at the first level (i.e., before the screen of the display device is detected). Therefore, if the screen of the display device is detected as a special screen, since the voltage polarity of the Source has already been reversed, Vcom will not be significantly coupled and cause a significant offset, thereby reducing the lateral crosstalk and color cast caused by the Vcom offset. Moreover, since the display device displays a normal screen when the voltage polarity of the Source is reversed, Vcom will not be significantly offset even if the voltage polarity of the Source is reversed. The phenomenon of a large and instantaneous drop in Vcom will occur (a large and instantaneous drop in Vcom will cause a large change in the voltage difference on both sides of the liquid crystal, thereby causing screen flickering). Therefore, this solution can improve the screen flickering phenomenon caused by the change in the polarity of the Source voltage. In addition, when the screen of the display device is detected to be a normal screen, the solution outputs a polarity reversal signal of the second level, so that the display device can display better. At this time, the polarity reversal signal changes from the first level to the second level, and the polarity of the Source voltage is reversed. However, since it is a normal screen at this time, Vcom will not deviate significantly. Therefore, when the polarity of the Source voltage is reversed, Vcom will not experience a large and instantaneous drop. That is, the polarity change of the Source voltage will not cause screen flickering. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A flowchart of a polarity reversal signal control method provided in an embodiment of the present application;

[0028] Figure 2 A schematic structural diagram of a polarity reversal signal control device provided in an embodiment of the present application;

[0029] Figure 3 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0031] Description of reference numerals:

[0032] 11- output module; 12- detection module;

[0033] 13-maintain module;

[0034] 110-display panel; 120-polarity inversion signal control device;

[0035] 210 - memory; 220 - processor. DETAILED DESCRIPTION

[0036] The following describes the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. The terms used in the implementation methods of the embodiments of the present application are only used to explain the specific embodiments of the present application and are not intended to limit the present application. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0037] When display devices display special graphics such as V-1 line and Dot on / off, panel characteristics can easily cause the common voltage (Vcom) to shift, leading to lateral crosstalk. Currently, source polarity compensation technology is commonly used. When the display device detects that the display device is displaying a special graphics display, the polarity of the source voltage is changed to reduce the Vcom shift, thereby reducing lateral crosstalk.

[0038] However, when the Source voltage polarity is changed, Vcom will drop back instantaneously to the display device's standard Vcom, resulting in a large ΔVcom. This causes the brightness of the entire screen to change instantaneously. The human eye is very sensitive to such brightness changes, causing the screen to "flicker," which can cause discomfort. In view of this, the present application provides a polarity inversion signal control method for reducing lateral crosstalk caused by Vcom offset when the display device displays special images, while also improving the screen flicker caused by the Source voltage polarity change.

[0039] The polarity reversal signal control method provided in the present application can be implemented by a polarity reversal signal control device. The polarity reversal signal control device can be a functional module or a physical module in a display device. When the polarity reversal signal control device is a physical module in a display device, the polarity reversal signal control device can be a chip or circuit in the display device. The polarity reversal signal control device can also be integrated on a central control board (timing controller, TCON).

[0040] Figure 1 A flow chart of the polarity reversal signal control method provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the polarity inversion signal control method provided in the embodiment of the present application may include the following steps:

[0041] S110 , outputting a polarity inversion signal of a first level every target duration.

[0042] Since each time the image of the display device is detected, analysis, counting, judgment and other operations are usually required, and these operations usually take 2-3 frames of time, the image of the display device can be detected once every at least 3 frames of time. Correspondingly, the target duration can also be greater than or equal to the duration corresponding to the display device displaying 3 frames of image.

[0043] The first level and the second level have opposite potentials. The second level is a level corresponding to a polarity inversion signal (POLarity Inversion, POL) when the display device displays a normal image.

[0044] The second level can be either high or low. When the second level is high, the first level is low, and when the second level is low, the first level is high. The display device displays a normal image most of the time, meaning that the POL maintains the second level most of the time, to save power, the POL can be maintained at a low level (i.e., the second level is low and the first level is high) when the display device displays a normal image.

[0045] When POL is at the first level, the driving mode of the display device can be a 2-line inversion mode, a 1+2-line inversion mode, or a heter-inversion mode.

[0046] To save power consumption, when the display device displays a normal image (ie, when POL is at the second level), the display device may be driven in a column inversion manner.

[0047] Specifically, a first-level POL can be output during the blanking time of the first frame (i.e., the frame before the display device starts detecting the image) every target duration. Since the display device does not display the image during the blanking time, the impact of possible POL level changes on the image can be reduced.

[0048] Before outputting the first level POL, if POL is already at the first level, then the first level POL may continue to be output.

[0049] Before outputting the first level POL, if POL is at the second level (a normal display), POL changes from the second level to the first level, and the corresponding Source voltage polarity is reversed. Since the display device is displaying a normal display at this time, Vcom does not deviate significantly. Therefore, even if the Source voltage polarity is reversed, Vcom does not experience a large and instantaneous drop (a large and instantaneous drop in Vcom would cause a significant change in the voltage difference across the liquid crystal, resulting in screen flicker).

[0050] S120: Detect the screen of the display device.

[0051] The screen of the display device may generally include a normal screen and a special screen. When the display device displays the normal screen, each sub-pixel of the display device generally displays a corresponding grayscale.

[0052] The special image may be a V-1 line, Dot on off or other images. When the display device displays the special image, each column of the image of the display device will appear alternately bright and dark.

[0053] When detecting the screen of the display device, the brightness of each sub-pixel in the screen of the display device can be detected, or the brightness of some sub-pixels in the screen of the display device can be detected, for example, the brightness of each sub-pixel in the odd / even rows of the display device can be detected.

[0054] It is understandable that, in addition to detecting the brightness of each sub-pixel, the image of the display device may also be detected by detecting the chromaticity of each sub-pixel, the driving current of each sub-pixel, and the like.

[0055] Specifically, the picture of the display device may be detected during the display of several (may be two frames, or may be three frames or more frames) second picture frames after the first picture frame.

[0056] Because the Source voltage polarity is reversed before testing, even if the display screen changes from a normal screen to a special screen during testing, Vcom will not be significantly coupled and cause a significant shift. Therefore, this solution can reduce lateral crosstalk and color cast caused by Vcom shifting when the display screen changes from a normal screen to a special screen during testing.

[0057] S130: Determine whether the screen of the display device is a special screen according to the detection result.

[0058] Specifically, if the number of adjacent sub-pixels that are alternately bright and alternately dark in the image of the display device is detected to be greater than or equal to a target number, the image of the display device can be determined to be a special image. The target number can be a pre-set number.

[0059] If it is detected that the number of adjacent sub-pixels that are alternately bright and alternately dark in the image of the display device is less than the target number, it can be determined that the image of the display device is not a special image, that is, the image of the display device is a normal image.

[0060] S140 : When the screen of the display device is a special screen, keep outputting the polarity inversion signal at the first level.

[0061] Because the voltage polarity of Source has already reversed when the most recent POL level changes from the second level to the first level before the image is detected (this change can be the first frame of the current detection cycle or the first frame of a previous detection cycle), Vcom will not be significantly coupled and cause a significant offset even if a special image is displayed. Therefore, if the display device detects that the image is a special image, there is no need to reverse the voltage polarity of Source; simply maintain the POL output at the first level.

[0062] S150 , when the picture of the display device is a normal picture, outputting a polarity inversion signal of a second level.

[0063] To enable the display device to display better, when it is detected that the picture of the display device is a normal picture, the second level POL can be output to restore the driving mode of the display device to the driving mode corresponding to the normal picture, such as column inversion.

[0064] At this time, POL changes from the first level to the second level, and the polarity of the Source voltage is reversed. Since the screen is normal at this time, Vcom does not deviate significantly. Therefore, Vcom does not drop significantly and instantly when the Source voltage polarity is reversed. In other words, the change in the Source voltage polarity does not cause screen flickering.

[0065] The technical solution provided by the embodiment of the present application is to first output a polarity reversal signal of a first level at every target time duration, then detect the screen of the display device. If the screen of the display device is detected as a special screen, the polarity reversal signal of the first level is maintained; if the screen of the display device is detected as a normal screen, the polarity reversal signal of the second level is output. When the display device is displaying a normal screen, the polarity reversal signal is at the second level, and the first level is opposite to the second level. In the above technical solution, since the polarity reversal signal is at the second level when the display device is displaying a normal screen, the voltage polarity of the Source is reversed when the polarity reversal signal is at the first level (i.e., before the screen of the display device is detected). Therefore, if the screen of the display device is detected as a special screen, since the voltage polarity of the Source has already been reversed, Vcom will not be significantly coupled and cause a significant offset, thereby reducing the lateral crosstalk and color cast caused by the Vcom offset. Moreover, since the display device displays a normal screen when the voltage polarity of the Source is reversed, Vcom will not be significantly offset even if the voltage polarity of the Source is reversed. The phenomenon of a large and instantaneous drop in Vcom will occur (a large and instantaneous drop in Vcom will cause a large change in the voltage difference on both sides of the liquid crystal, thereby causing screen flickering). Therefore, this solution can improve the screen flickering phenomenon caused by the change in the polarity of the Source voltage. In addition, when the screen of the display device is detected to be a normal screen, the solution outputs a polarity reversal signal of the second level, so that the display device can display better. At this time, the polarity reversal signal changes from the first level to the second level, and the polarity of the Source voltage is reversed. However, since it is a normal screen at this time, Vcom will not deviate significantly. Therefore, when the polarity of the Source voltage is reversed, Vcom will not experience a large and instantaneous drop. That is, the polarity change of the Source voltage will not cause screen flickering.

[0066] Those skilled in the art will appreciate that the above embodiments are exemplary and are not intended to limit the present application. Where possible, the execution order of one or more of the above steps can be adjusted, or selectively combined to obtain one or more other embodiments. Those skilled in the art can select and combine any of the above steps as needed, and any combination that does not deviate from the essence of the present application falls within the scope of protection of the present application.

[0067] Based on the same inventive concept, as an implementation of the above method, an embodiment of the present application provides a polarity reversal signal control device. The polarity reversal signal control device embodiment corresponds to the above method embodiment. For ease of reading, the present device embodiment will no longer repeat the details of the above method embodiment one by one, but it should be clear that the polarity reversal signal control device in this embodiment can correspond to all the contents of the above method embodiment.

[0068] Figure 2 This is a schematic diagram of the structure of the polarity reversal signal control device provided in an embodiment of the present application, as shown in FIG. Figure 2 As shown, the polarity reversal signal control device provided in this embodiment may include: an output module 11 , a detection module 12 and a holding module 13 .

[0069] The output module 11 is configured to output a polarity reversal signal of a first level every target duration, wherein when the display device displays a normal image, the polarity reversal signal is of a second level, and the first level is opposite to the second level;

[0070] The detection module 12 is used to detect the image of the display device;

[0071] The holding module 13 is configured to keep outputting the polarity inversion signal of the first level when the detection module 12 detects that the picture of the display device is a special picture;

[0072] The output module 11 is further configured to output a polarity inversion signal of a second level when the detection module 12 detects that the picture of the display device is a normal picture.

[0073] As an optional embodiment, the output module 11 is specifically used to output a first-level polarity inversion signal during the blanking time of the first picture frame every target duration, and the detection module 12 is specifically used to detect the picture of the display device during the display of several second picture frames after the first picture frame.

[0074] As an optional implementation manner, when the polarity inversion signal is at the first level, the driving mode of the display device is 2-line inversion.

[0075] As an optional implementation manner, when the polarity inversion signal is at the second level, the driving mode of the display device is column inversion.

[0076] As an optional implementation, the detection module 12 is specifically configured to:

[0077] If it is detected that the number of adjacent sub-pixels, one bright and one dark, in the picture of the display device is greater than or equal to the target number, determining that the picture of the display device is a special picture;

[0078] If it is detected that the number of adjacent sub-pixels that are alternately bright and alternately dark in the image of the display device is less than a target number, it is determined that the image of the display device is a normal image.

[0079] As an optional implementation manner, the target duration is greater than or equal to the duration corresponding to the display device displaying 3 frames of images.

[0080] As an optional implementation manner, the first level is a high level, and the second level is a low level.

[0081] The polarity reversal signal control device provided in this embodiment can execute the above method embodiment, and its implementation principle and technical effect are similar, which will not be repeated here.

[0082] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0083] Based on the same inventive concept, the embodiment of the present application further provides a display device, Figure 3 A schematic diagram of the structure of a display device provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the display device provided in this embodiment may include: a display panel 110 and the above-mentioned polarity inversion signal control device 120.

[0084] The display panel 110 can be any type of liquid crystal display panel, such as a liquid crystal display panel based on a thin film transistor (TFT-LCD), a liquid crystal display panel based on a light-emitting diode (LED), a liquid crystal display panel based on a sub-millimeter light-emitting diode (Mini-Light-Emitting Diode, Mini-LED), or a liquid crystal display panel based on a micron light-emitting diode (Micro-Light-Emitting Diode, Micro-LED).

[0085] All modules or units in the embodiments of the present application may be implemented by a general-purpose integrated circuit, such as a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit).

[0086] Based on the same inventive concept, an embodiment of the present application also provides an electronic device. Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application, such as Figure 4 As shown, the electronic device provided by this embodiment includes: a memory 210 and a processor 220, the memory 210 is used to store computer programs; the processor 220 is used to execute the method described in the above method embodiment when calling the computer program.

[0087] The electronic device provided in this embodiment can execute the above method embodiment, and its implementation principle and technical effects are similar, which will not be repeated here.

[0088] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method described in the above method embodiment is implemented.

[0089] An embodiment of the present application further provides a computer program product. When the computer program product is run on an electronic device, the electronic device implements the method described in the above method embodiment when executing the computer program product.

[0090] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted via the computer-readable storage medium. The computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, hard disk or tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)).

[0091] Those skilled in the art will appreciate that all or part of the process steps in the above-described method embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program can include the process steps in the above-described method embodiments. The aforementioned storage medium can include various media capable of storing program code, such as ROM or random access memory (RAM), magnetic disks, or optical disks.

[0092] The naming or numbering of steps in this application does not mean that the steps in the method flow must be executed in the time / logical sequence indicated by the naming or numbering. The execution order of the named or numbered process steps can be changed according to the technical purpose to be achieved, as long as the same or similar technical effects can be achieved.

[0093] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0094] In the embodiments provided in this application, it should be understood that the disclosed devices / equipment and methods can be implemented in other ways. For example, the device / equipment embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0095] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0096] In the description of this application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; "and / or" in this application is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.

[0097] Furthermore, in the description of this application, unless otherwise specified, "plurality" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, "at least one of a, b, or c" can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0098] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0099] In addition, in the description of this application specification and the appended claims, the terms "first," "second," "third," etc. are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that shown or described herein.

[0100] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A polarity inversion signal control method, characterized in that: include: Before detecting whether the screen of the display device is a special screen, outputting a polarity reversal signal of a first level every target time period, wherein when the display device displays a normal screen, the polarity reversal signal is of a second level, and the first level is opposite to the second level; detecting an image of the display device, wherein if the number of adjacent sub-pixels detected in the image of the display device, one bright and one dark, is greater than or equal to a target number, determining that the image of the display device is a special image; and if the number of adjacent sub-pixels detected in the image of the display device, one bright and one dark, is less than the target number, determining that the image of the display device is a normal image; When it is detected that the picture of the display device is a special picture, the polarity inversion signal of the first level is continuously outputted; When it is detected that the picture of the display device is a normal picture, a polarity inversion signal of a second level is output.

2. The method according to claim 1, characterized in that A polarity inversion signal of a first level is output during a blanking time of a first picture frame at every target duration, and a picture of the display device is detected during a display period of a plurality of second picture frames following the first picture frame.

3. The method according to claim 1, characterized in that When the polarity inversion signal is at the first level, the driving mode of the display device is 2-line inversion.

4. The method according to claim 1, wherein When the polarity inversion signal is at the second level, the display device is driven in a column inversion manner.

5. The method according to claim 1, wherein The target duration is greater than or equal to the duration corresponding to the display device displaying 3 frames of images.

6. The method according to any one of claims 1 to 5, characterized in that The first level is a high level, and the second level is a low level.

7. A polarity reversal signal control device, characterized in that: include: an output module, configured to output a polarity reversal signal of a first level at a target duration before detecting whether the screen displayed by the display device is a special screen, wherein when the display device displays a normal screen, the polarity reversal signal is of a second level, the first level being opposite to the second level; a detection module configured to detect an image of the display device, wherein if the number of adjacent sub-pixels in which one is bright and the other is dark in the image of the display device is detected to be greater than or equal to a target number, the image of the display device is determined to be a special image; and if the number of adjacent sub-pixels in which one is bright and the other is dark in the image of the display device is detected to be less than the target number, the image of the display device is determined to be a normal image; a holding module, configured to keep outputting a polarity reversal signal of a first level when detecting that the picture of the display device is a special picture; The output module is further configured to output a polarity inversion signal of a second level when it is detected that the picture of the display device is a normal picture.

8. A display device, characterized in that: include: A display panel and a polarity inversion signal control device as claimed in claim 7.

9. A computer program product, characterized in that When the computer program product is run on an electronic device, the electronic device is enabled to perform the method according to any one of claims 1 to 6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the polarity inversion signal control method according to any one of claims 1 to 6 is implemented.

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