Display panel, control method thereof, and display device

Abstract

The application provides a display panel and a control method thereof, and a display device. The display panel comprises an array substrate, an OLED device layer arranged above the array substrate, a glass cover plate arranged above the OLED device layer, and an auxiliary display layer arranged between the OLED device layer and the glass cover plate, wherein the auxiliary display layer is a light transmittance adjustable film layer. According to the embodiment of the application, the auxiliary display layer is arranged in the direction of the light emission side of the OLED device layer, and the light transmittance of the auxiliary display layer in the display panel is controlled to improve the color deviation problem.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display panel and its control method, and a display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) have attracted much attention, especially in the display and lighting fields, due to their high efficiency, wide color gamut, low power consumption, and rollability. Color deviation is a crucial parameter affecting OLED product quality, particularly at low grayscale levels. This defect is caused by two factors: firstly, the efficiency of RGB at low grayscale levels differs from that at high grayscale levels; secondly, the lower current flow of RGB at low grayscale levels makes them more susceptible to leakage interference, leading to color deviation.

[0003] Currently, existing technologies improve color shift by adding a color filter to the polarizer layer to correct RGB colors, but this results in excessive power consumption for OLED devices; alternatively, improving the leakage current of TFTs can improve color shift, but this method requires advanced array substrate manufacturing processes and is difficult to implement. Summary of the Invention

[0004] This application provides a display panel and its control method and display device to solve the color deviation problem of existing display panels.

[0005] The display panel provided in this application embodiment includes:

[0006] Array substrate;

[0007] OLED device layer, the OLED device layer is disposed on the array substrate;

[0008] A glass cover plate is placed on top of the OLED device layer; and

[0009] An auxiliary display layer is disposed between the OLED device layer and the glass cover.

[0010] The auxiliary display layer is a film layer with adjustable light transmittance.

[0011] Optionally, the display panel may also include:

[0012] The encapsulation layer is disposed on top of the OLED device layer;

[0013] Polarizing film, which is disposed on the encapsulation layer;

[0014] The touch panel is located between the polarizer and the glass cover.

[0015] The auxiliary display layer is located between the encapsulation layer and the polarizer or between the polarizer and the touch panel.

[0016] Optical adhesive is applied between each pair of the encapsulation layer, auxiliary display layer, polarizer, touch panel, and glass cover.

[0017] Optionally, the transmittance of the auxiliary display layer can be adjusted within the range of 10% to 90%.

[0018] Optionally, when the target grayscale value of the target sub-pixel in the display panel is greater than or equal to the critical grayscale value, the transmittance of the auxiliary display layer is 50% to 90%; and / or

[0019] When the target grayscale value of the target sub-pixel in the display panel is less than the critical grayscale value, the transmittance of the auxiliary display layer is 10% to 50%.

[0020] Optionally, the auxiliary display layer is an electrochromic layer or a liquid crystal layer.

[0021] This application provides a control method for a display panel, applied to the aforementioned display panel. The light-emitting side of the display panel includes an auxiliary display layer with adjustable light transmittance. The control method for the display panel includes:

[0022] Obtain the target grayscale value of the target subpixel in the display panel;

[0023] The transmittance of the auxiliary display layer is adjusted based on the target grayscale value and the critical grayscale value. The critical grayscale value is the grayscale value corresponding to the target sub-pixel when the display panel experiences color shift.

[0024] Optionally, the step of adjusting the transmittance of the auxiliary display layer based on the target grayscale value and the critical grayscale value includes:

[0025] If the target grayscale value of the target sub-pixel is less than the critical grayscale value, adjust the transmittance of the auxiliary display layer to 10%–50%.

[0026] Optionally, the step of adjusting the transmittance of the auxiliary display layer based on the target grayscale value and the critical grayscale value further includes:

[0027] If the target grayscale value of the target sub-pixel is less than the critical grayscale value, adjust the target grayscale value of the target sub-pixel to the critical grayscale value.

[0028] Optionally, the step of adjusting the transmittance of the auxiliary display layer based on the target grayscale value and the critical grayscale value includes:

[0029] If the target grayscale value of the target sub-pixel is greater than or equal to the critical grayscale value, adjust the transmittance of the auxiliary display layer to 50%–90%.

[0030] This application provides a display device, which includes the aforementioned display panel; and

[0031] The acquisition module is used to acquire the target grayscale value of the target sub-pixel in the display panel;

[0032] The adjustment module is used to adjust the transmittance of the auxiliary display layer according to the target grayscale value and the critical grayscale value. The critical grayscale value is the grayscale value corresponding to the target sub-pixel when the display panel experiences color shift.

[0033] The technical solution proposed in this application includes a display panel comprising: an array substrate; an OLED device layer disposed on the array substrate; a glass cover plate disposed on the OLED device layer; and an auxiliary display layer disposed between the OLED device layer and the glass cover plate; wherein the auxiliary display layer is a transmittance adjustable film layer. This application provides an auxiliary display layer with adjustable transmittance on the light-emitting side of the display panel, and improves the color shift problem of the display panel by adjusting the transmittance of the auxiliary display layer. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, in which the same reference numerals denote the same parts in the following description.

[0036] Figure 1 This is a schematic diagram of the structure of a display panel provided in one embodiment of this application;

[0037] Figure 2 This is a schematic diagram of the structure of a display panel provided in another embodiment of this application.

[0038] Figure 3 This is a flowchart illustrating the control method for the display panel of this application;

[0039] Figure 4 This is a flowchart illustrating a control method for a display panel according to an embodiment of this application;

[0040] Figure 5 This is a flowchart illustrating a control method for a display panel in another embodiment of this application;

[0041] Figure 6 This is a structural diagram of the display device provided in the embodiments of this application;

[0042] Figure 7 This is a schematic diagram of the hardware operating environment of the terminal involved in the embodiments of this application.

[0043] Explanation of icon numbers:

[0044]

[0045]

[0046] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0049] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0050] This application provides a display panel, which will be described in detail below.

[0051] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a display panel provided in one embodiment of this application. Figure 2 This is a schematic diagram of the structure of a display panel provided in another embodiment of this application. In this embodiment, the display panel 20 includes: an array substrate 21, an OLED device layer 22, a glass cover plate 26, and an auxiliary display layer 27. The OLED device layer 22 is disposed on the array substrate 21; the glass cover plate 26 is disposed on the OLED device layer 22; and the auxiliary display layer 27 is disposed between the OLED device layer 22 and the glass cover plate 26. The auxiliary display layer 27 is a light transmittance adjustable film layer.

[0052] Understandably, the auxiliary display layer 27 is an electrochromic layer structure with variable transmittance. For example, the auxiliary display layer can be an electrochromic layer or a liquid crystal layer. The electrochromic layer is formed using electrochromic materials. The optical properties of electrochromic materials, such as reflectivity, transmittance, and absorptivity, undergo stable and reversible color changes under the influence of an applied electric field, manifesting as reversible changes in color and transparency. By applying a voltage to the electrochromic layer, the transmittance of light can be changed. The lower the voltage applied to the electrochromic layer, the greater the transmittance of light, and vice versa. The liquid crystal layer is formed using liquid crystals, which are organic compounds that exist between solid and liquid states. At room temperature, they exhibit both the fluidity of liquids and the optical anisotropy of crystals. Heating them turns them into a transparent liquid, while cooling them turns them into a crystalline, cloudy solid. Under the influence of an electric field, the liquid crystal molecules will change their arrangement, which will affect the intensity of the incident light beam passing through the liquid crystal. This change in light intensity will be further manifested as a change in brightness through the action of the polarizer.

[0053] Specifically, in this embodiment, the display panel 20 further includes: an encapsulation layer 23, a polarizer 24, and a touch panel 25. The encapsulation layer 23 is disposed above the OLED device layer 22; the polarizer 24 is disposed above the encapsulation layer 23; the touch panel 25 is disposed between the polarizer 24 and the glass cover plate 26; wherein, the auxiliary display layer 27 is disposed between the encapsulation layer 23 and the polarizer 24 or between the polarizer 24 and the touch panel 25; optical adhesive 28 is provided between each pair of the encapsulation layer 23, the auxiliary display layer 27, the polarizer 24, the touch panel 25, and the glass cover plate 26.

[0054] In this embodiment, the optical adhesive 28 serves to connect the encapsulation layer 23, the auxiliary display layer 27, the polarizer 24, the touch panel 25, and the glass cover 26. The optical adhesive 28 possesses advantages such as high light transmittance (total light transmittance > 99%), high adhesion, high weather resistance, and water resistance. The array substrate 21, OLED device layer 22, encapsulation layer 23, polarizer 24, touch panel 25, and glass cover 26 are the basic structures of a typical display panel. The structural composition and preparation method of each layer are the same as those of existing display panels and will not be described in detail here.

[0055] In the technical solution proposed in this application, an auxiliary display layer 27 is provided between the encapsulation layer 23 and the polarizer 24 of the display panel 20 or between the polarizer 24 and the touch panel 25. The light transmittance of the auxiliary display layer 27 can then be adjusted, thereby improving the color shift problem of the display panel 20.

[0056] In a preferred embodiment, the auxiliary display layer 27 is made of a material that has no effect on the emitted light color and has a wide range of transmittance, such as liquid crystal / electrochromic glass. The transmittance of the auxiliary display layer 27 can be adjusted within the range of 10% to 90%.

[0057] Specifically, in the embodiments of this application, when the target grayscale value of the target sub-pixel in the display panel 20 is greater than or equal to the critical grayscale value, the transmittance of the auxiliary display layer is 50% to 90%; when the target grayscale value of the target sub-pixel in the display panel is less than the critical grayscale value, the transmittance of the auxiliary display layer is 10% to 50%. Understandably, when the target grayscale value of the target sub-pixel in the display panel 20 is greater than or equal to the critical grayscale value, it is not necessary to adjust the target grayscale value of the target sub-pixel in the display panel 20. It is only necessary to control the transmittance of the auxiliary display layer 27 to be maintained at 50% to 90%. At this time, the auxiliary display layer 27 does not affect the normal light output of the display panel 20. When the target grayscale value of the target sub-pixel in the display panel 20 is less than the critical grayscale value, the target grayscale value of the target sub-pixel in the display panel 20 is adjusted to the critical grayscale value and maintained. Then, the transmittance of the auxiliary display layer 27 is adjusted to be reduced to 10% to 50%. By reducing the transmittance of the auxiliary display layer 27, when the target grayscale value of the target sub-pixel in the display panel 20 is equal to the critical grayscale value, the grayscale value (display grayscale value) of the target sub-pixel in the image of the display panel 20 finally observed by the user is less than the critical grayscale value, so as to achieve the display of a lower grayscale image. It is understandable that the target grayscale value of the target sub-pixel is the display brightness of the target sub-pixel in the display panel 20. The brightness of the light emitted by the target sub-pixel will change after passing through some film layers. That is, the display panel 20 will also have a display grayscale value that is different from the grayscale output of the target sub-pixel. This display grayscale value is the brightness that the display panel 20 finally displays. In other words, the display grayscale value of the display panel 20 is the grayscale value of the target sub-pixel in the image that is ultimately observed by the user's naked eye.

[0058] Please see Figure 3 , Figure 3 This is a flowchart illustrating the control method for the display panel of this application. This application also proposes a control method for a display panel, applied to the display panel in the above embodiments. The control method for the display panel includes:

[0059] S10. Obtain the target grayscale value of the target sub-pixel in the display panel 20;

[0060] Specifically, the target sub-pixel in the display panel 20 can be one pixel or multiple pixels, and the grayscale value of the pixel can be an integer from 0 to 255 (inclusive). During use, the target sub-pixel of the display panel 20 has a real-time target grayscale value, which changes according to the current. Furthermore, the brightness of the light emitted by the target sub-pixel changes after passing through several film layers, meaning the display panel 20 also has a display grayscale value different from the output grayscale of the target sub-pixel. In essence, the display brightness of the target sub-pixel is the target grayscale value of the display panel 20, and the final brightness displayed by the display panel 20 is its display grayscale value. In other words, the display grayscale value of the display panel 20 is the grayscale value of the target sub-pixel as perceived by the user's naked eye in the final image.

[0061] S20. Adjust the transmittance of the auxiliary display layer 27 according to the target grayscale value and the critical grayscale value, wherein the critical grayscale value is the grayscale value corresponding to the target sub-pixel when the display panel 20 experiences color shift.

[0062] Specifically, color shift refers to the difference between the color of an image and its original hue. This is caused by the different efficiency of RGB at lower grayscale levels compared to higher grayscale levels, and also by the lower current flow of RGB at lower grayscale levels, making them more susceptible to leakage interference. Since different display panels 20 have different grayscale values ​​corresponding to color shifts, it is necessary to pre-test the critical grayscale level corresponding to the color shift (or out-of-range color shift) of the display panel 20. It is understood that the critical grayscale value of the display panel 20 in this embodiment has been pre-tested and confirmed to be stored, and real-time testing and confirmation are not required. By comparing the real-time target grayscale value of the display panel 20 with its own critical grayscale value, it is possible to subsequently determine how to adjust the target grayscale value of the display panel 20 and / or the transmittance of the auxiliary display layer 27 in real time.

[0063] In this embodiment, by adjusting the target grayscale value of the display panel 20 and / or adjusting the transmittance of the auxiliary display layer 27, the display grayscale value of the display panel 20 is less than the critical grayscale value when the target grayscale value of the target sub-pixel in the display panel 20 is equal to the critical grayscale value, so as to achieve the display of a lower grayscale image and improve the color shift problem under low grayscale.

[0064] Further, please refer to Figure 4 , Figure 4 This is a flowchart illustrating a control method for a display panel according to an embodiment of this application. In this embodiment, the target grayscale value of the target sub-pixel is less than the critical grayscale value; in this case, step S20 includes:

[0065] S21. Adjust the transmittance of the auxiliary display layer 27 to 10%–50%.

[0066] Furthermore, when the target grayscale value of the target sub-pixel is less than the critical grayscale value; step S20 also includes:

[0067] S211. Adjust the target grayscale value of the target sub-pixel to the critical grayscale value.

[0068] Specifically, when the target grayscale value is less than the critical grayscale value, the target grayscale value of the display panel 20 is adjusted to the critical grayscale value and maintained. Then, the transmittance of the auxiliary display layer 27 is reduced to make the display grayscale value of the display panel 20 less than the critical grayscale value. For example, if the critical grayscale value of the display panel 20 is 32 grayscale levels, and 8 grayscale brightness is required, the OLED device layer 22 still needs to output the current corresponding to 32 grayscale levels. Furthermore, by reducing the transmittance of the auxiliary display layer 27, the display brightness of the display panel 20 is made equivalent to 8 grayscale levels. That is, when the target grayscale value of the target sub-pixel in the display panel 20 is equal to the critical grayscale value of 32 grayscale levels, the display grayscale value of the display panel 20 is less than the critical grayscale value, and the latest display grayscale value can display 8 grayscale brightness. In this case, the power consumption of the display panel 20 increases, but since the power consumption of 32 grayscale levels is very small, approximately 1% of 255 grayscale levels, even if the method in this application causes an increase in power consumption at low grayscale levels, the increase is far less than the overall power consumption and has almost no impact.

[0069] Further, please refer to Figure 5 , Figure 5 This is a flowchart illustrating a control method for a display panel according to another embodiment of this application. In this embodiment, the target grayscale value of the target sub-pixel is greater than or equal to the critical grayscale value; in this case, step S20 includes:

[0070] S22, Adjust the transmittance of the auxiliary display layer 27 to 50%–90%.

[0071] It is understandable that when the target grayscale value is greater than the critical grayscale value, there is no need to adjust the target grayscale value of the display panel 20. It is only necessary to control the auxiliary display layer 27 to maintain the maximum light transmittance. At this time, the auxiliary display layer 27 does not affect the normal light output of the display panel 20.

[0072] The technical solution proposed in this application has no impact on high grayscale and improves color shift in low grayscale; and since the power consumption of the display panel 20 is low in low grayscale, changing the transmittance of the auxiliary display layer 27 to achieve low grayscale without color shift has little impact on the overall power consumption of the product.

[0073] Please see Figure 6 , Figure 6This is a structural diagram of the display device 10 provided in the embodiments of this application. In the implementation of this application, the display device 10 includes the display panel 20 in any of the above embodiments, and the display device 10 further includes:

[0074] Acquisition module 30 is used to acquire the target grayscale value of the target sub-pixel in the display panel 20;

[0075] The adjustment module 50 is used to adjust the transmittance of the auxiliary display layer 27 according to the target grayscale value and the critical grayscale value, wherein the critical grayscale value is the grayscale value corresponding to the target sub-pixel when the display panel 20 experiences color shift.

[0076] In this embodiment, the transmittance of the auxiliary display layer 27 is adjusted by adjusting the target grayscale value so that when the target grayscale value of the target sub-pixel in the display panel 20 is equal to the critical grayscale value, the display grayscale value of the display panel 20 is less than the critical grayscale value, so as to achieve the display of a lower grayscale image and improve the color shift problem under low grayscale.

[0077] Furthermore, when the target grayscale value is less than the critical grayscale value, the adjustment module 50 is used to adjust the transmittance of the auxiliary display layer 27 to 10% to 50%, and adjust the target grayscale value to the critical grayscale value.

[0078] Specifically, when the target grayscale value is less than the critical grayscale value, the adjustment module 50 adjusts the target grayscale value of the display panel 20 to the critical grayscale value and maintains it, and then adjusts and reduces the transmittance of the auxiliary display layer 27 so that when the target grayscale value of the target sub-pixel in the display panel 20 is equal to the critical grayscale value, the display grayscale value of the display panel 20 is less than the critical grayscale value.

[0079] Furthermore, when the target grayscale value is greater than or equal to the critical grayscale value, the adjustment module 50 is used to adjust the transmittance of the auxiliary display layer 27 to 50%–90%.

[0080] It is understandable that when the target grayscale value is greater than the critical grayscale value, there is no need to adjust the target grayscale value of the display panel 20. It is only necessary to use the adjustment module 50 to control the auxiliary display layer 27 to maintain a relatively high light transmittance. At this time, the auxiliary display layer 27 does not affect the normal light output of the display panel 20.

[0081] Furthermore, such as Figure 7 As shown, Figure 7This is a schematic diagram of the hardware operating environment of the terminal involved in the embodiment of the present application. The terminal in this embodiment is a display device 10, which further includes: a memory 1002, a processor 1001, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the various steps of the control method for the display panel as described in any of the above embodiments.

[0082] Specifically, the display device 10 may include: a processor 1001, such as a CPU, a memory 1002, and a communication bus 1003. The communication bus 1003 is used to enable communication between the various components of the terminal. The memory 1002 may be a high-speed RAM or a stable, non-volatile memory, such as a disk drive. Optionally, the memory 1002 may also be a storage device independent of the aforementioned processor 1001.

[0083] Furthermore, the memory 1002, which serves as a computer storage medium, may include a control application program for the display panel 20.

[0084] exist Figure 7 In the terminal shown, the processor 1001 can be used to call the control application of the display panel 20 stored in the memory 1002 and perform the following operations:

[0085] Obtain the target grayscale value of the target sub-pixel in the display panel 20;

[0086] Based on the target grayscale value and the critical grayscale value, the target grayscale value and / or the transmittance of the auxiliary display layer 27 are adjusted, wherein the critical grayscale value is the grayscale value corresponding to the target sub-pixel when the display panel 20 experiences color shift.

[0087] The above control method allows for the control of the target grayscale value of the display panel 20 and / or the transmittance of the auxiliary display layer 27. When the target grayscale value is less than the critical grayscale value, the target grayscale value of the display panel 20 is adjusted to the critical grayscale value and maintained. Then, the transmittance of the auxiliary display layer 27 is reduced so that, while the target grayscale value of the target sub-pixel in the display panel 20 is equal to the critical grayscale value, the displayed grayscale value of the display panel 20 is less than the critical grayscale value, thereby achieving the display of a lower grayscale image and improving the color shift problem at low grayscale levels. When the target grayscale value is greater than or equal to the critical grayscale value, it is not necessary to adjust the target grayscale value of the display panel 20; it is only necessary to control the auxiliary display layer 27 to maintain maximum transmittance. In this case, the auxiliary display layer 27 does not affect the normal light emission of the display panel 20.

[0088] Furthermore, this application also proposes a storage medium storing a control program for the display panel 20. When the control program for the display panel 20 is executed by a processor, it implements the various steps of the control method for the display panel as described in any of the above embodiments.

[0089] The above provides a detailed description of a display panel and its control method and display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. 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 this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display panel, characterized in that, include: Array substrate; An OLED device layer is disposed on the array substrate; A glass cover plate, wherein the glass cover plate is disposed on the OLED device layer; as well as An auxiliary display layer is disposed between the OLED device layer and the glass cover plate; The auxiliary display layer is a film layer with adjustable light transmittance; Wherein, when the target grayscale value of the target sub-pixel in the display panel is greater than or equal to the critical grayscale value, the transmittance of the auxiliary display layer is 50%~90%; and / or When the target grayscale value of the target sub-pixel in the display panel is less than the critical grayscale value, the transmittance of the auxiliary display layer is 10%~50%.

2. The display panel as described in claim 1, characterized in that, Also includes: An encapsulation layer is disposed on top of the OLED device layer; A polarizer, wherein the polarizer is disposed on the encapsulation layer; A touch panel, wherein the touch panel is disposed between the polarizer and the glass cover plate; The auxiliary display layer is disposed between the encapsulation layer and the polarizer or between the polarizer and the touch panel; Optical adhesive is provided between each pair of the encapsulation layer, the auxiliary display layer, the polarizer, the touch panel, and the glass cover.

3. The display panel as described in claim 1, characterized in that, The transmittance of the auxiliary display layer can be adjusted within the range of 10% to 90%.

4. The display panel as described in any one of claims 1-3, characterized in that, The auxiliary display layer is an electrochromic layer or a liquid crystal layer.

5. A method for controlling a display panel, characterized in that, Applied to a display panel, wherein the light-emitting side of the display panel includes an auxiliary display layer with adjustable light transmittance, the method includes: Obtain the target grayscale value of the target sub-pixel in the display panel; The transmittance of the auxiliary display layer is adjusted according to the target grayscale value and the critical grayscale value, wherein the critical grayscale value is the grayscale value corresponding to the target sub-pixel when the display panel experiences color shift. The step of adjusting the transmittance of the auxiliary display layer based on the target grayscale value and the critical grayscale value includes: If the target grayscale value of the target sub-pixel is less than the critical grayscale value, adjust the transmittance of the auxiliary display layer to 10%~50%; and / or If the target grayscale value of the target sub-pixel is greater than or equal to the critical grayscale value, the transmittance of the auxiliary display layer is adjusted to 50%~90%.

6. The control method for the display panel as described in claim 5, characterized in that, The step of adjusting the transmittance of the auxiliary display layer based on the target grayscale value and the critical grayscale value further includes: If the target grayscale value of the target sub-pixel is less than the critical grayscale value, the target grayscale value of the target sub-pixel is adjusted to the critical grayscale value.

7. A display device, characterized in that, include: The display panel as described in any one of claims 1-4; The acquisition module is used to acquire the target grayscale value of the target sub-pixel in the display panel; An adjustment module is used to adjust the transmittance of the auxiliary display layer according to the target grayscale value and the critical grayscale value, wherein the critical grayscale value is the grayscale value corresponding to the target sub-pixel when the display panel experiences color shift.

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