Display panel, brightness compensation method thereof, brightness compensation system and display device

Abstract

The invention discloses a display panel, a brightness compensation method and system thereof and a display device. The display panel comprises a pixel unit, the pixel unit comprises a first color sub-pixel, a second color sub-pixel, a third color sub-pixel and a white sub-pixel, and the brightness compensation method comprises the following steps: receiving original brightness data of the first color sub-pixel, the second color sub-pixel and the third color sub-pixel; calculating the brightness of the white sub-pixels according to a formula W = a * min (L1, L2, L3); calculating the compensated brightness of the first color sub-pixel, the compensated brightness of the second color sub-pixel and the compensated brightness of the third color sub-pixel according to the brightness of the white sub-pixel; wherein a is an adjustable coefficient, and the size of a can be adjusted according to different types of display panels; l1 is the original brightness of the first color sub-pixel; l2 is the original brightness of the second color sub-pixel; l3 is the original brightness of the third color sub-pixel; and min (L1, L2, L3) is a minimum value taking function.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the field of display technology, and specifically relate to a display panel and a brightness compensation method thereof, a brightness compensation system and a display device. Background Art

[0002] LCD (Liquid Crystal Display) display screens have attracted widespread attention due to their advantages such as low power consumption, small size and low radiation. Summary of the invention

[0003] The embodiments of the present disclosure provide a display panel and a brightness compensation method, a brightness compensation system and a display device. The brightness compensation method of the display panel can make the calculation method of the white sub-pixel brightness applicable to various types of display panels, thereby solving the problem that the white sub-pixel brightness algorithm in the related art is not very applicable, improving the applicability of the white sub-pixel brightness algorithm, and broadening the application scenarios of the white sub-pixel brightness algorithm.

[0004] In a first aspect, an embodiment of the present disclosure provides a brightness compensation method for a display panel, wherein the display panel includes a pixel unit, wherein the pixel unit includes a first color sub-pixel, a second color sub-pixel, a third color sub-pixel, and a white sub-pixel.

[0005] The brightness compensation method includes: receiving original brightness data of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel;

[0006] Calculate the brightness of the white sub-pixel according to the formula W=a×min(L1, L2, L3);

[0007] Calculate the compensated brightness of the first color sub-pixel, the compensated brightness of the second color sub-pixel, and the compensated brightness of the third color sub-pixel according to the brightness of the white sub-pixel;

[0008] Among them, W is the brightness of the white sub-pixel; a is an adjustable coefficient, and a can be adjusted according to the type of the display panel; L1 is the original brightness of the first color sub-pixel; L2 is the original brightness of the second color sub-pixel; L3 is the original brightness of the third color sub-pixel; min(L1, L2, L3) is a function that takes the minimum value among L1, L2, and L3.

[0009] In some embodiments, the step of calculating the compensated brightness of the first color sub-pixel, the compensated brightness of the second color sub-pixel, and the compensated brightness of the third color sub-pixel according to the brightness of the white sub-pixel includes:

[0010] Calculate the compensated brightness of the first color sub-pixel according to the brightness of the white sub-pixel and the formula L1'=b1×k×L1-W;

[0011] Calculate the compensated brightness of the second color sub-pixel according to the brightness of the white sub-pixel and the formula L2'=b2×k×L2-W;

[0012] Calculate the compensated brightness of the third color sub-pixel according to the brightness of the white sub-pixel and the formula L3'=b3×k×L3-W;

[0013] Among them, b1, b2 and b3 are all adjustable coefficients, and the sizes of b1, b2 and b3 can be adjusted according to the different types of the display panel; L1' is the brightness of the first color sub-pixel after compensation; L2' is the brightness of the second color sub-pixel after compensation; L3' is the brightness of the third color sub-pixel after compensation; k is the brightness enhancement multiple, and the value range of k is 1 to 2.

[0014] In some embodiments, when the areas of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are equal, the value of a is the ratio of the area of ​​the white sub-pixel to the area of ​​any one of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel.

[0015] In some embodiments, when the areas of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are different, the value of a is the ratio of the area of ​​the white sub-pixel to the area of ​​the smallest one among the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel.

[0016] In some embodiments, b1=1-(1-a)G' / kG1;

[0017] b2=1-(1-a)G' / kG2;

[0018] b3=1-(1-a)G' / kG3;

[0019] Among them, G' is the minimum value of the original brightness grayscale of the first color sub-pixel, the original brightness grayscale of the second color sub-pixel and the original brightness grayscale of the third color sub-pixel; G1 is the original brightness grayscale of the first color sub-pixel; G2 is the original brightness grayscale of the second color sub-pixel; G3 is the original brightness grayscale of the third color sub-pixel.

[0020] In some embodiments, the first color sub-pixel comprises a red sub-pixel;

[0021] The second color sub-pixel comprises a green sub-pixel;

[0022] The third color sub-pixel includes a blue sub-pixel.

[0023] In some embodiments, it also includes: providing the brightness of the white sub-pixel, the brightness of the first color sub-pixel after compensation, the brightness of the second color sub-pixel after compensation, and the brightness of the third color sub-pixel after compensation to the display panel, and the display panel displays according to the brightness of the white sub-pixel, the brightness of the first color sub-pixel after compensation, the brightness of the second color sub-pixel after compensation, and the brightness of the third color sub-pixel after compensation.

[0024] In a second aspect, an embodiment of the present disclosure further provides a brightness compensation system, including: a receiving module, configured to receive original brightness data of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel;

[0025] a calculation module configured to calculate the brightness of the white sub-pixel according to the formula W=a×min(L1, L2, L3); and calculate the compensated brightness of the first color sub-pixel, the compensated brightness of the second color sub-pixel, and the compensated brightness of the third color sub-pixel according to the brightness of the white sub-pixel;

[0026] Among them, W is the brightness of the white sub-pixel; a is an adjustable coefficient, and a can be adjusted according to the type of the display panel; L1 is the original brightness of the first color sub-pixel; L2 is the original brightness of the second color sub-pixel; L3 is the original brightness of the third color sub-pixel; min(L1, L2, L3) is a function that takes the minimum value among L1, L2, and L3.

[0027] In a third aspect, an embodiment of the present disclosure further provides a display panel, comprising the above-mentioned brightness compensation system.

[0028] In a fourth aspect, an embodiment of the present disclosure further provides a display device, comprising the above-mentioned display panel.

[0029] Beneficial technical effects of the present invention: In the brightness compensation method for a display panel provided by the present invention, the a value can be flexibly adjusted according to the type of the display panel, such as the a value can be flexibly adjusted according to the actual display effect of the display panel, so that the calculation method of the white sub-pixel brightness is applicable to various types of display panels, thereby solving the problem of the poor applicability of the white sub-pixel brightness algorithm in the related technology, improving the applicability of the white sub-pixel brightness algorithm, and broadening the application scenarios of the white sub-pixel brightness algorithm; at the same time, it can also effectively solve the problems of display color deviation, uneven brightness transition and low brightness enhancement level of the display panel.

[0030] The display panel provided by the present invention, by adopting the above-mentioned brightness compensation method, can, on the one hand, improve the display brightness of the display panel; on the other hand, it can also effectively solve the problems of display color cast, uneven brightness transition and low brightness enhancement level of the display panel; on the other hand, it can flexibly adjust the brightness of red, green and blue sub-pixels according to user needs, so that the display panel can be suitable for various application scenarios.

[0031] The display device provided by the present invention improves the display effect of the display device by adopting the above-mentioned display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing detailed example embodiments with reference to the accompanying drawings, in which:

[0033] Figure 1a The figure is a schematic diagram of the arrangement of sub-pixels in a display panel in the related art.

[0034] Figure 1b The figure is a schematic diagram of the arrangement of sub-pixels in another display panel in the related art.

[0035] Figure 2 The present invention is a flow chart of a brightness compensation method for a display panel according to an embodiment of the present invention.

[0036] Figure 3 The schematic diagram of a brightness compensation system in an embodiment of the present disclosure is shown in FIG. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, a display panel and a brightness compensation method, a brightness compensation system and a display device provided by the embodiments of the present disclosure are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] The embodiments of the present disclosure will be described more fully below with reference to the accompanying drawings, but the embodiments shown may be embodied in different forms and should not be construed as being limited to the embodiments set forth in the present disclosure. On the contrary, the purpose of providing these embodiments is to make the present disclosure thorough and complete and to enable those skilled in the art to fully understand the scope of the present disclosure.

[0039] The embodiments of the present disclosure are not limited to the embodiments shown in the drawings, but include modifications of the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the drawings have schematic properties, and the shapes of the regions shown in the drawings illustrate the specific shapes of the regions, but are not intended to be limiting.

[0040] In LCD (Liquid Crystal Display) display panels, RGBW (red, green, blue, white sub-pixels) technology is widely used in outdoor display and projection applications. Compared with the RGB (red, green, blue sub-pixels) LCD in related technologies, white sub-pixels are introduced. The introduction of white sub-pixels can improve the transmittance of the display panel, thereby further improving the display brightness of the display panel, which is suitable for areas with high-brightness display requirements. However, the introduction of W sub-pixels means that different types of display panels have different algorithms for W sub-pixel brightness, which results in different display effects for different types of display panels.

[0041] At present, the algorithm of W sub-pixel brightness of RGBW technology has certain limitations and cannot be fully adapted to all types of RGBW display panels. This results in the need to redevelop the algorithm of W sub-pixel brightness for different types of display panels in actual use, and the universality of the W sub-pixel brightness algorithm is not strong. For different types of display panels, if the algorithm of W sub-pixel brightness is not adjusted properly, it will cause problems such as color cast, uneven brightness transition, and low brightness improvement level on the display panel. Therefore, how to develop a W sub-pixel brightness algorithm with strong universality and good display effect has become a problem that needs to be solved urgently.

[0042] In the related art, refer to Figure 1a and Figure 1b For Real RGBW display panels, each pixel is composed of independent R sub-pixel 1, G sub-pixel 2, B sub-pixel 3 and W sub-pixel 4, so there is no problem of sub-pixel sharing, the display effect is better and the application is more extensive. There are also many types of Real RGBW display panels, such as Figure 1a The display panel shown in FIG. 1 is a display panel in which the width and area of ​​the W sub-pixel 4 are consistent with those of the RGB sub-pixels (1, 2, 3). In theory, the brightness of the W sub-pixel 4 can be evenly superimposed on the brightness of the RGB sub-pixels (1, 2, 3) next to it. Therefore, the algorithm for the brightness of the W sub-pixel 4 needs to be designed according to this theory. Figure 1b The display panel shown in FIG. 1 is a display panel in which the width and area of ​​the W sub-pixel 4 are inconsistent with those of the RGB sub-pixels (1, 2, 3). This display panel is no longer applicable to the theory that the brightness of the W sub-pixel 4 is averagely superimposed on the brightness of the RGB sub-pixels (1, 2, 3) next to it, that is, Figure 1a The algorithm for the brightness of sub-pixel 4 in W cannot be applied Figure 1b Display panel in .

[0043] In the related art, the calculation method of the brightness of the W sub-pixel in the RGBW display panel is shown in Formula 1, W=min(R, G, B), that is, the brightness of the W sub-pixel is equal to the minimum value of the brightness of the RGB sub-pixels. Using the calculation method of the brightness of the W sub-pixel in Formula 1, the brightness of the W sub-pixel is always equal to the minimum value of the brightness of the RGB sub-pixels, so that the brightness calculation of the W sub-pixel cannot be adapted accordingly according to different types of display panels.

[0044] In addition, in the related art, for the brightness compensation of RGB sub-pixels in an RGBW display panel, taking the R sub-pixel as an example, the calculation method of the brightness compensation is shown in Formula 2, R 后 = k × R 原 -W; where R 后 is the red sub-pixel brightness after algorithm compensation; R 原 is the original brightness of the red sub-pixel; k is the brightness enhancement factor, and the k value range is 1 to 2; W is the brightness of the white sub-pixel. As can be seen from Formula 2, since the brightness of the white sub-pixel of a display panel of a certain type in the related art is relatively fixed, the brightness compensation calculation formula of the RGB sub-pixel is also relatively fixed, and cannot be flexibly adjusted according to different types of display panels and actual display effects.

[0045] In order to solve the above problems in the related art, in a first aspect, an embodiment of the present disclosure provides a brightness compensation method for a display panel, wherein the display panel includes a pixel unit, and the pixel unit includes a first color sub-pixel, a second color sub-pixel, a third color sub-pixel and a white sub-pixel, such as Figure 2 As shown, the brightness compensation method includes: step S101: receiving original brightness data of a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel;

[0046] Step S102: Calculate the brightness of the white sub-pixel according to the formula W=a×min(L1, L2, L3);

[0047] Step S103: calculating the compensated brightness of the first color sub-pixel, the compensated brightness of the second color sub-pixel, and the compensated brightness of the third color sub-pixel according to the brightness of the white sub-pixel;

[0048] Among them, W is the brightness of the white sub-pixel; a is an adjustable coefficient, and a can be adjusted according to the type of display panel; L1 is the original brightness of the first color sub-pixel; L2 is the original brightness of the second color sub-pixel; L3 is the original brightness of the third color sub-pixel; min(L1, L2, L3) is a function that takes the minimum value among L1, L2, and L3.

[0049] The display panel may be an LCD (liquid crystal) display panel or an OLED (organic electroluminescent) display panel.

[0050] In this embodiment, the a value can be flexibly adjusted according to the type of display panel. For example, the a value can be flexibly adjusted according to the actual display effect of the display panel, so that the calculation method of the white sub-pixel brightness is applicable to various types of display panels, thereby solving the problem of low applicability of the white sub-pixel brightness algorithm in the related technology, improving the applicability of the white sub-pixel brightness algorithm, and broadening the application scenarios of the white sub-pixel brightness algorithm; at the same time, it can also effectively solve the problems of display color deviation, uneven brightness transition and low brightness enhancement level of the display panel.

[0051] In some embodiments, step S103: calculating the compensated brightness of the first color sub-pixel, the compensated brightness of the second color sub-pixel, and the compensated brightness of the third color sub-pixel according to the brightness of the white sub-pixel, comprising: calculating the compensated brightness of the first color sub-pixel according to the brightness of the white sub-pixel and the formula L1'=b1×k×L1-W;

[0052] Calculate the compensated brightness of the second color sub-pixel according to the brightness of the white sub-pixel and the formula L2'=b2×k×L2-W;

[0053] The brightness of the third color sub-pixel after compensation is calculated according to the brightness of the white sub-pixel and the formula L3'=b3×k×L3-W;

[0054] Among them, b1, b2 and b3 are all adjustable coefficients, and the sizes of b1, b2 and b3 can be adjusted according to the different types of display panels; L1' is the brightness of the first color sub-pixel after compensation; L2' is the brightness of the second color sub-pixel after compensation; L3' is the brightness of the third color sub-pixel after compensation; k is the brightness enhancement multiple, and the value range of k is 1 to 2.

[0055] In this embodiment, based on the a value, it can be flexibly adjusted according to the type of display panel, so that the brightness of the white sub-pixel can be flexibly adjusted according to various types of display panels; on this basis, the b1, b2 and b3 values ​​can be flexibly adjusted according to the type of display panel, such as the b1, b2 and b3 values ​​can be flexibly adjusted according to the actual display effect of the display panel, so that the compensation algorithm for the brightness of the first color, the second color and the third color sub-pixel is applicable to various types of display panels, thereby solving the problem of weak applicability of the compensation algorithm for the brightness of the first color, the second color and the third color sub-pixel in the related technology, improving the applicability of the compensation algorithm for the brightness of the first color, the second color and the third color sub-pixel, and broadening the application scenarios of the compensation algorithm for the brightness of the first color, the second color and the third color sub-pixel; at the same time, it can also effectively solve the problems of display color deviation, uneven brightness transition and low brightness enhancement level of the display panel.

[0056] In some embodiments, when the areas of the first color subpixel, the second color subpixel and the third color subpixel are equal, the value of a is the ratio of the area of ​​the white subpixel to the area of ​​any one of the first color subpixel, the second color subpixel and the third color subpixel.

[0057] The areas of the first color sub-pixel, the second color sub-pixel and the third color sub-pixel refer to their orthographic projection areas on the display panel, and the area of ​​the white sub-pixel refers to its orthographic projection area on the display panel.

[0058] In some embodiments, Figure 1a As shown in , the areas of the red sub-pixel, the green sub-pixel, the blue sub-pixel and the white sub-pixel are equal, and the value of a is 1. Figure 1b As shown, the areas of the red sub-pixel, the green sub-pixel and the blue sub-pixel are equal, the area of ​​the white sub-pixel is 1 / 2 of the area of ​​any one of the red sub-pixel, the green sub-pixel and the blue sub-pixel, and the value of a is 0.5.

[0059] In some embodiments, when the areas of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are different, the value of a is the ratio of the area of ​​the white sub-pixel to the area of ​​the smallest one among the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel.

[0060] In this embodiment, the value of a can be flexibly adjusted according to the ratio of the area of ​​the white sub-pixel to the area of ​​other color sub-pixels in the display panel, thereby making the white sub-pixel brightness algorithm more applicable and avoiding the problem of having to redevelop the white sub-pixel brightness algorithm when replacing a display panel. It has high flexibility and strong applicability.

[0061] In some embodiments, b1=1-(1-a)G' / kG1; b2=1-(1-a)G' / kG2; b3=1-(1-a)G' / kG3; wherein G' is the minimum value among the original brightness grayscale of the first color sub-pixel, the original brightness grayscale of the second color sub-pixel and the original brightness grayscale of the third color sub-pixel; G1 is the original brightness grayscale of the first color sub-pixel; G2 is the original brightness grayscale of the second color sub-pixel; G3 is the original brightness grayscale of the third color sub-pixel.

[0062] Taking the brightness compensation algorithm of the first color sub-pixel as an example, the calculation process of b1 is: in order to ensure the display effect of the brightness of the first color sub-pixel after compensation, let the brightness of the first color sub-pixel after compensation calculated according to the formula L1'=b1×k×L1-W be equal to the brightness of the first color sub-pixel after compensation calculated according to the formula L1'=k×L1-W in the related art, then k×L1-W=b1×k×L1-W; ... Formula 3

[0063] That is, k×L1-min(L1, L2, L3)=b1×k×L1-a×min(L1, L2, L3);…Equation 4

[0064] Wherein, L1 is recorded as the original brightness grayscale G1 of the first color sub-pixel; min(L1, L2, L3) is recorded as the minimum value G' among the original brightness grayscale of the first color sub-pixel, the original brightness grayscale of the second color sub-pixel and the original brightness grayscale of the third color sub-pixel; according to the above formula 4, b1=1-(1-a)G' / kG1 can be calculated. The calculation process of b2 and b3 is the same as that of b1, which will not be repeated here.

[0065] Theoretically, when G' / kG1≤1 and a≤1, b1 is a positive value; when a>1, b1 is still a positive value, combined with the area ratio of the white sub-pixel to the other color sub-pixels (when the areas of the other color sub-pixels are equal, the area of ​​the other color sub-pixels refers to the area of ​​any other color sub-pixel), if the area of ​​the white sub-pixel is smaller than the areas of the other color sub-pixels, then b1 is less than 1, and the compensation is small; if the area of ​​the white sub-pixel is relatively consistent with the areas of the other color sub-pixels, then b1=1, which is consistent with the compensation algorithm in the relevant technology; if the area of ​​the white sub-pixel is larger than the areas of the other color sub-pixels, then b is greater than 1, and the compensation is large.

[0066] In some embodiments, reference Figure 1a and Figure 1b , the first color sub-pixel includes a red sub-pixel 1; the second color sub-pixel includes a green sub-pixel 2; and the third color sub-pixel includes a blue sub-pixel 3.

[0067] In some embodiments, the brightness compensation method of the display panel also includes: step S104: providing the brightness of the white sub-pixel, the brightness of the first color sub-pixel after compensation, the brightness of the second color sub-pixel after compensation, and the brightness of the third color sub-pixel after compensation to the display panel, and the display panel displays according to the brightness of the white sub-pixel, the brightness of the first color sub-pixel after compensation, the brightness of the second color sub-pixel after compensation, and the brightness of the third color sub-pixel after compensation.

[0068] The brightness compensation method of the display panel provided in this embodiment can, on the one hand, improve the display brightness of the display panel; on the other hand, it can also effectively solve the problems of display color cast, uneven brightness transition and low brightness enhancement level of the display panel; on the other hand, it can flexibly adjust the brightness of red, green and blue sub-pixels according to user needs, so that the display panel can be suitable for various application scenarios.

[0069] In a second aspect, based on the brightness compensation method in the above embodiment, the embodiment of the present disclosure further provides a brightness compensation system, such as Figure 3As shown, it includes: a receiving module 5, configured to receive the original brightness data of the first color sub-pixel, the second color sub-pixel and the third color sub-pixel; a calculating module 6, configured to calculate the brightness of the white sub-pixel according to the formula W=a×min(L1, L2, L3); and calculate the compensated brightness of the first color sub-pixel, the compensated brightness of the second color sub-pixel and the compensated brightness of the third color sub-pixel according to the brightness of the white sub-pixel; wherein W is the brightness of the white sub-pixel; a is an adjustable coefficient, and a can be adjusted to different sizes according to different display panel types; L1 is the original brightness of the first color sub-pixel; L2 is the original brightness of the second color sub-pixel; L3 is the original brightness of the third color sub-pixel; min(L1, L2, L3) is a function that takes the minimum value among L1, L2 and L3.

[0070] In some embodiments, the brightness compensation system also includes a compensation module 7, which is configured to provide the brightness of the white sub-pixel, the brightness of the first color sub-pixel after compensation, the brightness of the second color sub-pixel after compensation, and the brightness of the third color sub-pixel after compensation to the display panel, so that the display panel displays according to the brightness of the white sub-pixel, the brightness of the first color sub-pixel after compensation, the brightness of the second color sub-pixel after compensation, and the brightness of the third color sub-pixel after compensation.

[0071] In a third aspect, the embodiments of the present disclosure further provide a display panel, comprising the brightness compensation system in the above embodiments.

[0072] Among them, the display panel receives the brightness of the white sub-pixel, the brightness of the first color sub-pixel after compensation, the brightness of the second color sub-pixel after compensation, and the brightness of the third color sub-pixel after compensation provided by the above-mentioned brightness compensation system, and displays according to the brightness of the white sub-pixel, the brightness of the first color sub-pixel after compensation, the brightness of the second color sub-pixel after compensation, and the brightness of the third color sub-pixel after compensation.

[0073] By adopting the brightness compensation system in the above embodiment, on the one hand, the display brightness of the display panel can be improved; on the other hand, it can also effectively solve the problems of display color cast, uneven brightness transition and low brightness enhancement level of the display panel; on the other hand, the brightness of the red, green and blue sub-pixels can be flexibly adjusted according to user needs, so that the display panel can be suitable for various application scenarios.

[0074] In a fourth aspect, an embodiment of the present disclosure further provides a display device, comprising the display panel in the above embodiment.

[0075] By adopting the display panel in the above embodiment, the display effect of the display device is improved.

[0076] The display device provided in the embodiments of the present disclosure may be any product or component with a display function, such as an LCD panel, an LCD television, an LCD billboard, an OLED panel, an OLED television, an OLED billboard, a display, a mobile phone, a navigator, or the like.

[0077] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A brightness compensation method for a display panel, wherein the display panel comprises a pixel unit, wherein the pixel unit comprises a first color sub-pixel, a second color sub-pixel, a third color sub-pixel and a white sub-pixel, It is characterized in that The brightness compensation method includes: receiving original brightness data of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel; Calculate the brightness of the white sub-pixel according to the formula W=a×min(L1, L2, L3); Calculate the compensated brightness of the first color sub-pixel, the compensated brightness of the second color sub-pixel, and the compensated brightness of the third color sub-pixel according to the brightness of the white sub-pixel; Among them, W is the brightness of the white sub-pixel; a is an adjustable coefficient, and a can be adjusted according to the type of the display panel; L1 is the original brightness of the first color sub-pixel; L2 is the original brightness of the second color sub-pixel; L3 is the original brightness of the third color sub-pixel; min(L1, L2, L3) is a function that takes the minimum value among L1, L2, and L3.

2. The brightness compensation method according to claim 1, characterized in that: The step of calculating the compensated brightness of the first color sub-pixel, the compensated brightness of the second color sub-pixel, and the compensated brightness of the third color sub-pixel according to the brightness of the white sub-pixel includes: Calculate the compensated brightness of the first color sub-pixel according to the brightness of the white sub-pixel and the formula L1'=b1×k×L1-W; Calculate the compensated brightness of the second color sub-pixel according to the brightness of the white sub-pixel and the formula L2'=b2×k×L2-W; Calculate the compensated brightness of the third color sub-pixel according to the brightness of the white sub-pixel and the formula L3'=b3×k×L3-W; Among them, b1, b2 and b3 are all adjustable coefficients, and the sizes of b1, b2 and b3 can be adjusted according to the different types of the display panel; L1' is the brightness of the first color sub-pixel after compensation; L2' is the brightness of the second color sub-pixel after compensation; L3' is the brightness of the third color sub-pixel after compensation; k is the brightness enhancement multiple, and the value range of k is 1 to 2.

3. The brightness compensation method according to claim 1, characterized in that: When the areas of the first color sub-pixel, the second color sub-pixel and the third color sub-pixel are equal, the value of a is the ratio of the area of ​​the white sub-pixel to the area of ​​any one of the first color sub-pixel, the second color sub-pixel and the third color sub-pixel.

4. The brightness compensation method according to claim 1, characterized in that: When the areas of the first color sub-pixel, the second color sub-pixel and the third color sub-pixel are different, the value of a is the ratio of the area of ​​the white sub-pixel to the area of ​​the smallest one among the first color sub-pixel, the second color sub-pixel and the third color sub-pixel.

5. The brightness compensation method according to claim 2, characterized in that: b1=1-(1-a)G' / kG1; b2=1-(1-a)G' / kG2; b3=1-(1-a)G' / kG3; Among them, G' is the minimum value of the original brightness grayscale of the first color sub-pixel, the original brightness grayscale of the second color sub-pixel and the original brightness grayscale of the third color sub-pixel; G1 is the original brightness grayscale of the first color sub-pixel; G2 is the original brightness grayscale of the second color sub-pixel; G3 is the original brightness grayscale of the third color sub-pixel.

6. The brightness compensation method according to any one of claims 1 to 5, characterized in that: The first color sub-pixel comprises a red sub-pixel; The second color sub-pixel comprises a green sub-pixel; The third color sub-pixel includes a blue sub-pixel.

7. The brightness compensation method according to claim 1 or 2, characterized in that: Also includes: The brightness of the white sub-pixel, the compensated brightness of the first color sub-pixel, the compensated brightness of the second color sub-pixel, and the compensated brightness of the third color sub-pixel are provided to the display panel, and the display panel displays according to the brightness of the white sub-pixel, the compensated brightness of the first color sub-pixel, the compensated brightness of the second color sub-pixel, and the compensated brightness of the third color sub-pixel.

8. A brightness compensation system, characterized in that: include: A receiving module, configured to receive original brightness data of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel; A calculation module, configured to calculate the brightness of the white sub-pixel according to a formula W=a×min(L1, L2, L3); and calculating the compensated brightness of the first color sub-pixel, the compensated brightness of the second color sub-pixel, and the compensated brightness of the third color sub-pixel according to the brightness of the white sub-pixel; Wherein, W is the brightness of the white sub-pixel; a is an adjustable coefficient, and the size of a can be adjusted according to the type of the display panel; L1 is the original brightness of the first color sub-pixel; L2 is the original brightness of the second color sub-pixel; L3 is the original brightness of the third color sub-pixel; min(L1, L2, L3) is a function that takes the minimum value among L1, L2, and L3.

9. A display panel, characterized in that: Includes the brightness compensation system as described in claim 8.

10. A display device, characterized in that: Comprising the display panel as claimed in claim 9.

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