Spliced display device and brightness compensation method thereof

Abstract

The invention provides a tiled display device and a brightness compensation method thereof, and the method comprises the steps: determining a first gray scale of a to-be-compensated pixel according to a to-be-displayed image of the tiled display device and a to-be-compensated position parameter; according to the first gray scale, the to-be-compensated position parameter, a plurality of preset standard position parameters and a plurality of preset second compensation gray scales of standard pixels, a first target compensation gray scale is obtained through calculation, and finally gray scale compensation is carried out on the to-be-compensated pixel based on the first target compensation gray scale. The gray scale compensation of any pixel to be compensated in the first display area of the first display panel is realized, and the first target compensation gray scale required by the pixel to be compensated can be adaptively adjusted according to multiple frames of images to be displayed of the tiled display device. The shadow gap existing in the boundary area of the first display panel and the second display panel is eliminated, and the brightness uniformity of the tiled display device is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a spliced ​​display device and a brightness compensation method thereof. Background Art

[0002] In a scenario where the first display panel and the second display panel form a spliced ​​display device, due to the objective existence of a physical seam between the first display panel and the second display panel, the display brightness of the boundary area between the first display panel and the second display panel is low, so that there is a visible shadow gap in the boundary area between the first display panel and the second display panel, thereby deteriorating the brightness uniformity of the spliced ​​display device. Summary of the invention

[0003] The present application provides a spliced ​​display device and a brightness compensation method thereof to solve the technical problem of a shadow gap existing in a boundary area between a first display panel and a second display panel.

[0004] In a first aspect, the present application provides a brightness compensation method for a spliced ​​display device, wherein the spliced ​​display device includes two first display panels and a second display panel disposed between the two first display panels, wherein the first display panel includes a first display area and a second display area, wherein the first display area is located on a side of the second display area close to the second display panel, and the first display area is provided with a plurality of first pixels, wherein the brightness compensation method includes:

[0005] Acquire a first grayscale of a pixel to be compensated according to an image to be displayed of the spliced ​​display device and a position parameter to be compensated of the pixel to be compensated, wherein the pixel to be compensated is at least one of the plurality of first pixels;

[0006] Calculating a first target compensation grayscale of the pixel to be compensated according to the first grayscale, the position parameter to be compensated, a plurality of preset standard position parameters of standard pixels, and a plurality of preset second compensation grayscales corresponding to the display grayscale of the standard pixels;

[0007] Grayscale compensation is performed on the pixel to be compensated based on the first target compensation grayscale.

[0008] In the brightness compensation method of the spliced ​​display device provided in the present application, the step of calculating the first target compensation grayscale of the pixel to be compensated according to the first grayscale, the position parameter to be compensated, the pre-set standard position parameters of multiple standard pixels, and the pre-set multiple second compensation grayscales corresponding to the display grayscale of the standard pixel includes:

[0009] Acquiring a target standard position parameter from the plurality of standard position parameters based on the position parameter to be compensated;

[0010] Acquire a second target compensation grayscale from a plurality of second compensation grayscales based on the first grayscale and the target standard position parameter;

[0011] The first target compensation grayscale is calculated according to the to-be-compensated position parameter, the target standard position parameter and the second target compensation grayscale.

[0012] In the brightness compensation method of the spliced ​​display device provided in the present application, the step of acquiring a target standard position parameter from a plurality of standard position parameters based on the position parameter to be compensated comprises:

[0013] Based on the position parameter to be compensated, multiple target standard position parameters are obtained from the multiple standard position parameters, the minimum value of the multiple target standard position parameters is less than or equal to the position parameter to be compensated, and the maximum value of the multiple target standard position parameters is greater than or equal to the position parameter to be compensated.

[0014] In the brightness compensation method of the spliced ​​display device provided in the present application, the number of the target standard position parameters obtained from the plurality of standard position parameters based on the position parameter to be compensated is four, and the four target standard position parameters correspond to the first standard pixel, the second standard pixel, the third standard pixel, and the fourth standard pixel, respectively;

[0015] The first standard pixel and the second standard pixel are located in the same pixel row of the first display panel, the third standard pixel and the fourth standard pixel are located in the same pixel row of the first display panel, the first standard pixel and the third standard pixel are located in the same pixel column of the first display panel, and the second standard pixel and the fourth standard pixel are located in the same pixel column of the first display panel;

[0016] Furthermore, along the pixel row direction of the first display panel, the target standard position parameter of the first standard pixel is smaller than the position parameter to be compensated and the target standard position parameter of the second standard pixel is larger than the position parameter to be compensated;

[0017] Furthermore, along the pixel column direction of the first display panel, the target standard position parameter of the first standard pixel is greater than the position parameter to be compensated and the target standard position parameter of the third standard pixel is less than the position parameter to be compensated.

[0018] In the brightness compensation method of the spliced ​​display device provided in the present application, the first target compensation grayscale is calculated according to the first preset relationship, the position parameter to be compensated, the four target standard position parameters and the four second target compensation grayscales, and the first preset relationship is:

[0019]

[0020] Among them, val3 is the first target compensation grayscale, val u is the first reference compensation data calculated based on the second target compensation grayscale of the first standard pixel and the second target compensation grayscale of the second standard pixel, val d is the second reference compensation data calculated based on the second target compensation grayscale of the third standard pixel and the second target compensation grayscale of the fourth standard pixel, H ud is the distance between the target standard position parameter of the first standard pixel and the target standard position parameter of the third standard pixel in the pixel column direction of the first display panel, H u3 is the distance between the target standard position parameter of the first standard pixel and the position parameter to be compensated in the pixel column direction of the first display panel.

[0021] In the brightness compensation method of the spliced ​​display device provided in the present application, the first reference compensation data is calculated based on a second preset relationship, and the second preset relationship is:

[0022]

[0023] Among them, the val u is the first reference compensation data, val lu The second target compensation grayscale of the first standard pixel, val ru is the second target compensated grayscale of the second standard pixel, W 3l is the distance between the position parameter to be compensated and the target standard position parameter of the first standard pixel in the pixel row direction of the first display panel, W rl is a distance between a target standard position parameter of the second standard pixel and a target standard position parameter of the first standard pixel in a pixel row direction of the first display panel;

[0024] and / or,

[0025] The second reference compensation data is calculated based on a third preset relationship, and the third preset relationship is:

[0026]

[0027] Among them, the val d is the second reference compensation data, val ld is the second target compensation grayscale of the third standard pixel, val rd The second target compensated grayscale is the fourth standard pixel.

[0028] In the brightness compensation method of the spliced ​​display device provided in the present application, the display grayscale includes the binding point grayscale of the standard pixel;

[0029] The step of acquiring a second target compensation grayscale from a plurality of second compensation grayscales based on the first grayscale and the target standard position parameter comprises:

[0030] Acquire the second compensation grayscale of a target binding point grayscale from a plurality of second compensation grayscales based on the first grayscale and the target standard position parameter, the target binding point grayscale being the binding point grayscale corresponding to the first grayscale;

[0031] The second target compensation grayscale is obtained according to a fourth preset relationship, the first grayscale, the target binding point grayscale and the second compensation grayscale of the target binding point grayscale, wherein the fourth preset relationship is:

[0032]

[0033] Among them, val0 is the second target compensation grayscale, graya1 is the first target binding point grayscale, graya2 is the second target binding point grayscale, val1 is the second compensation grayscale corresponding to the first target binding point grayscale, val2 is the second compensation grayscale corresponding to the second target binding point grayscale, the first target binding point reference grayscale is the binding point grayscale corresponding to the first grayscale and whose grayscale value is less than or equal to the first grayscale, and the second reference target binding point grayscale is the binding point grayscale corresponding to the first grayscale and whose grayscale value is greater than or equal to the first grayscale.

[0034] In the brightness compensation method of the spliced ​​display device provided in the present application, the step of obtaining the first grayscale of the pixel to be compensated according to the image to be displayed of the spliced ​​display device and the position parameter to be compensated of the pixel to be compensated comprises:

[0035] Acquire the initial gray scale of the pixel to be compensated according to the image to be displayed of the spliced ​​display device and the position parameter to be compensated;

[0036] The grayscale value of the initial grayscale is reduced to obtain the first grayscale.

[0037] In the brightness compensation method of the spliced ​​display device provided in the present application, the step of reducing the grayscale value of the initial grayscale to obtain the first grayscale includes:

[0038] The grayscale value of the initial grayscale is reduced according to a grayscale adjustment formula to obtain the first grayscale, and the grayscale adjustment formula is:

[0039] gray2=gray2*a0;

[0040] Among them, gray2 is the initial grayscale, gray1 is the first grayscale, a0 is an adjustment coefficient, and the adjustment coefficient is a constant less than 1 and greater than 0.

[0041] In the brightness compensation method of the spliced ​​display device provided in the present application, the adjustment coefficient also satisfies a fifth preset relationship, which is:

[0042]

[0043] Among them, gray r is the maximum value of the gray scale of the binding point of the liquid crystal display panel, gray m is the maximum value of the grayscale displayed by the liquid crystal display panel.

[0044] In a second aspect, the present application provides a spliced ​​display device, the spliced ​​display device comprising two first display panels and a second display panel disposed between the two first display panels, the first display panel comprising a first display area and a second display area, the first display area being located on a side of the second display area close to the second display panel, the first display area being provided with a plurality of first pixels, the spliced ​​display device further comprising:

[0045] A first grayscale acquisition module, the first grayscale acquisition module is used to acquire a first grayscale of a pixel to be compensated based on the image to be displayed of the spliced ​​display device and a preset position parameter to be compensated, the pixel to be compensated being at least one of the plurality of first pixels;

[0046] A compensation data storage module, the compensation data storage module is used to store a plurality of pre-set standard position parameters of standard pixels, display grayscales of the standard pixels, and a plurality of second compensation grayscales of the standard pixels;

[0047] A grayscale compensation module is used to calculate a first target compensation grayscale of the pixel to be compensated according to the first grayscale, the position parameter to be compensated, the standard position parameter and the second compensation grayscale, and perform grayscale compensation on the pixel to be compensated based on the first target compensation grayscale.

[0048] In the splicing display device provided in the present application, the grayscale compensation module includes:

[0049] A target standard position parameter acquisition unit, the target standard position parameter acquisition unit is used to acquire the target standard position parameter from the compensation data storage module based on the position parameter to be compensated;

[0050] a second target compensation grayscale acquisition unit, the second target compensation grayscale acquisition unit being used to acquire a second target compensation grayscale from the compensation data storage module based on the first grayscale and the target standard position parameter;

[0051] A first target compensation grayscale calculation unit, the first target compensation grayscale calculation unit is used to calculate the first target compensation grayscale based on the to-be-compensated position parameter, the target standard position parameter and the second target compensation grayscale;

[0052] A compensation processing unit, wherein the compensation processing unit is used to perform grayscale compensation on the pixel to be compensated according to the first target compensation grayscale.

[0053] In the brightness compensation method of a spliced ​​display device provided in the present application, the pixels to be compensated and the first grayscale of the pixels to be compensated located in the first display area are first determined according to the image to be displayed of the spliced ​​display device and the pre-set position parameters to be compensated, and then the first target compensation grayscale is calculated according to the first grayscale, the position parameters to be compensated, the pre-set standard position parameters of multiple standard pixels and the pre-set second compensation grayscale of multiple standard pixels. Finally, grayscale compensation is performed on the pixels to be compensated based on the first target compensation grayscale, so that any pixel to be compensated located in the first display area of ​​the first display panel (that is, the boundary area of ​​the liquid crystal display panel) can be grayscale compensated separately, and the first target compensation grayscale required by the pixel to be compensated can be adaptively adjusted according to multiple frames of images to be displayed of the spliced ​​display device, thereby eliminating the shadow gap existing in the boundary area between the first display panel and the second display panel and improving the brightness uniformity of the spliced ​​display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 A schematic diagram of a spliced ​​display device provided in an embodiment of the present application;

[0055] Figure 2 A schematic diagram of a step of a brightness compensation method for a spliced ​​display device provided in an embodiment of the present application;

[0056] Figure 3 for Figure 2 A schematic diagram of a step of S202 in FIG.

[0057] Figure 4 For Figure 1 A schematic diagram of a GAMMA curve before grayscale adjustment and a GAMMA curve after grayscale adjustment corresponding to pixels of the first display panel;

[0058] Figure 5 for Figure 2 A schematic diagram of a step of S204 in FIG.

[0059] Figure 6 A schematic diagram of the relative positions of four standard pixels and one pixel to be compensated in a spliced ​​display device provided in an embodiment of the present application;

[0060] Figure 7 for Figure 5 A schematic diagram of a step of S2044 in FIG.

[0061] Figure 8 for Figure 7 A schematic diagram of an interpolation method between the first grayscale in S20442 and the corresponding target binding point grayscale;

[0062] Fig. 9 A block diagram of a spliced ​​display device provided in an embodiment of the present application;

[0063] Fig.10 for Fig. 9 A block diagram of the grayscale compensation module in FIG. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. The described embodiments are only used to explain the ideas created by the present invention and should not be regarded as limiting the scope of protection of the present application.

[0065] like Figure 1 As shown, the spliced ​​display device 100 provided in the embodiment of the present application includes two first display panels 101 and a second display panel 102 disposed between the two first display panels 101 .

[0066] The first display panel 101 can be a liquid crystal display panel (LCD), a mini light emitting diode (Mini-LED) display panel and a micro light emitting diode (Micro-LED) display panel, and the second display panel 102 can be a mini light emitting diode display panel and a micro light emitting diode display panel.

[0067] The first display panel 101 includes a first display area A1 and a second display area A2, and the first display area A1 is located on the side of the second display area A2 close to the second display panel 102. For the present splicing display device 100, in order to realize that the physical splicing area between the two spliced ​​first display panels 101 is also displayed, the second display panel 102 is set in the splicing area. However, there is a visible shadow gap of about 2 mm in the splicing edge area C between the first display panel 101 and the second display panel 102. The first display area A1 is the boundary area of ​​the first display panel 101. In order to solve the shadow gap between the first display panel 101 and the second display panel 102, it is necessary to adjust the brightness of the first display area A1 to eliminate the visual shadow gap. The first display area A1 and the second display area A2 are both provided with a plurality of pixels. In this embodiment, the pixel located in the first display area A1 is the first pixel.

[0068] Based on this, Figure 2 As shown, the brightness compensation method 200 of the spliced ​​display device provided in the present application includes the following steps:

[0069] Step S202, obtaining a first grayscale of a pixel to be compensated according to an image to be displayed of the spliced ​​display device and a position parameter to be compensated of the pixel to be compensated. The pixel to be compensated is at least one of the plurality of first pixels.

[0070] In step S202, the pixel to be compensated and the position parameter to be compensated are in a one-to-one correspondence, that is to say. For the spliced ​​display device 100, one pixel to be compensated corresponds only to one position parameter to be compensated, and one position parameter to be compensated also corresponds only to one pixel to be compensated. The position parameter to be compensated is the position parameter of the pixel to be compensated in the first display panel 101, that is, a coordinate system is established with n rows and m columns of pixels arrayed in the first display panel 101, and the coordinate value of the pixel to be compensated in the established coordinate system is the position parameter to be compensated. The specific coordinate value of the pixel to be compensated in the coordinate system can be determined according to the row and column of the pixel to be compensated in the first display panel 101, the distance between two adjacent columns of pixels, and the distance between two adjacent rows of pixels.

[0071] In step S202, the pixels to be compensated in the first display panel 101 are first determined according to the position parameters to be displayed, and then the initial grayscale of the pixels to be compensated is directly acquired from the image to be displayed according to the pixels to be compensated.

[0072] In some embodiments provided in the present application, the first gray scale is an initial gray scale of the pixel to be compensated.

[0073] In some embodiments provided in this application, Figure 3 As shown, step S202 may specifically include:

[0074] Step S2021 , obtaining an initial grayscale of a pixel to be compensated according to the image to be displayed of the spliced ​​display device and the position parameter to be compensated.

[0075] Step S2022, reducing the grayscale value of the initial grayscale to obtain a first grayscale. That is, in this embodiment, the first grayscale is not the initial grayscale of the pixel to be compensated, and the first grayscale is obtained by adjusting the grayscale value of the initial grayscale.

[0076] Step S2022 may specifically include: reducing the grayscale value of the initial grayscale according to a grayscale adjustment formula to obtain a first grayscale. The grayscale adjustment formula is:

[0077] gray1=gray2*a0(1);

[0078] In the grayscale adjustment formula (1), gray1 is the first grayscale of the pixel to be compensated, gray2 is the initial grayscale of the pixel to be compensated, a0 is the adjustment coefficient, and the adjustment coefficient is a constant less than 1 and greater than 0. a0 is an adjustment coefficient predetermined before the spliced ​​display device 100 leaves the factory, and based on the adjustment coefficient being a constant less than 1 and greater than 0, the grayscale value of the first grayscale is less than the grayscale value of the initial grayscale.

[0079] According to the grayscale adjustment formula (1), the first grayscale and the initial grayscale of the same pixel to be compensated maintain a linear relationship, such as Figure 4 As shown, the GAMMA curve of the first display panel 101 before adjusting the grayscale has a GAMMA characteristic of 2.2, that is, the grayscale value gray of any pixel in the first display panel 101 and the brightness value L corresponding to the grayscale satisfy: L=gray GAMMA On the basis of GAMMA=2.2, after the grayscale adjustment formula (5) is used, the first grayscale gray1 of the pixel to be compensated and the brightness value L2 corresponding to the first grayscale still satisfy: L2=gray1 GAMMA And GAMMA=2.2.

[0080] That is to say, the first gray scale of the pixel to be compensated is obtained by performing a gradation process based on the GAMMA curve of the first display panel 101. Figure 4 The GAMMA curve before grayscale adjustment shown in the figure is adjusted as a whole to the GAMMA curve after grayscale adjustment, thereby reserving a certain grayscale compensation space for the initial grayscale close to the maximum display grayscale of the first display panel 101, thereby avoiding the initial grayscale being close to the maximum display grayscale of the first display panel 101, causing the grayscale picture to be unable to continue to compensate upwards.

[0081] Figure 4The GAMMA curve of the grayscale display level of the first display panel 101 shown is 8 bits (i.e., the grayscale levels are gray0 to gray255, with a total of 256 grayscale levels), so the maximum value of the displayed grayscale is gray255, and the minimum value of the displayed grayscale is gray0. In some other embodiments provided in the present application, the grayscale display level of the first display panel 101 can also be 10 bits (i.e., the grayscale levels are gray0 to gray1023, with a total of 1024 grayscale levels), so the maximum value of the displayed grayscale is gray1023, and the minimum value of the displayed grayscale is gray0.

[0082] In order to avoid adjusting the second grayscale of the pixel to be compensated to be too small, in some preferred embodiments provided in the present application, the adjustment coefficient a0 also satisfies the fifth preset relationship:

[0083]

[0084] In the fifth preset relational expression (2), gray r is the maximum value of the grayscale of the binding points of the first display panel 101, gray m is the maximum value of the display grayscale of the first display panel 101. The binding point grayscale of the first display panel 101 refers to the binding point grayscale pre-set for demura (uniform display) compensation of the first display panel 101. The number of binding point grayscales is multiple, and the grayscale value of the binding point grayscale satisfies the requirement of being greater than the minimum value of the display grayscale of the first display panel 101 and less than the maximum value of the display grayscale of the first display panel 101. Still taking the grayscale display level of the first display panel 101 as 256 levels as an example, the minimum value of the display grayscale is gray0, and the maximum value of the display grayscale is gray255, then the pre-set binding point grayscale can be gray25, gray60, gray128 and gray230, then the maximum value of the grayscale among the pre-set multiple binding point grayscales is gray230, then a0≥(gray230 / gray255).

[0085] In step S202 , the pixel to be compensated is at least one of the plurality of first pixels. The specific number of the pixels to be compensated is related to the model type and size of the first display panel 101 , and the number of the pixels to be compensated can be selected according to actual needs.

[0086] The position parameters of the pixels to be compensated are preset. The step S2001 of determining the position parameters to be compensated is before the step S202. For example, the step S2001 may specifically include:

[0087] Step S20011, a test display image of the spliced ​​display device 100 during the display process is photographed by a high-definition camera (such as a CCD), and display parameters of the spliced ​​display device 100 are obtained according to the test display image. The display parameters may include the display grayscale of the first display panel 101, the display grayscale of the second display panel 102, and the grayscale value and brightness value of each pixel in the test display image.

[0088] Step S20012, based on the test display image, the grayscale value of each first pixel is obtained, and the grayscale value of each first pixel is compared with the grayscale values ​​of at least two adjacent pixels to determine whether the difference between the grayscale value of each first pixel and the grayscale values ​​of at least two adjacent pixels reaches a preset threshold. If the difference between the grayscale value of the first pixel and the two adjacent pixels reaches the preset threshold, the first pixel whose grayscale value difference with the two adjacent pixels reaches the preset threshold is determined as a pixel to be compensated, and the position parameter of the pixel to be compensated in the first display panel 101 is obtained.

[0089] Step S204, a first target compensation grayscale is calculated based on the first grayscale, the position parameter to be compensated, the pre-set standard position parameters of a plurality of standard pixels, and a plurality of pre-set second compensation grayscales corresponding to the display grayscale of the standard pixels. In step S204, the second compensation grayscale corresponds one-to-one to the display grayscale of the standard pixels and the standard position parameters.

[0090] The standard position parameter is the position parameter of the standard pixel in the first display panel 101. The standard position parameter represents the coordinate value of the standard pixel in the coordinate system of the first display panel 101. The specific coordinate value of the standard pixel in the coordinate system is determined according to the row and column where the standard pixel is actually located in the first display panel 101, the distance between two adjacent columns of pixels, and the distance between two adjacent rows of pixels.

[0091] In some embodiments provided in the present application, the display grayscale of the standard pixel in step S204 may be the full grayscale of the standard pixel, and the full grayscale of the standard pixel depends on the grayscale display level of the first display panel 101. Taking the grayscale display level of the first display panel 101 as 8 bits as an example, the full grayscale of the standard pixel is gray1 to gray255 (a total of 256 levels), and the second compensation grayscale corresponds one-to-one to the full grayscale and the standard position parameter.

[0092] In some other embodiments provided by the present application, the display grayscale of the standard pixel in step S204 includes the binding point grayscale of the standard pixel, and the second compensation grayscale corresponds to the binding point grayscale and the standard position parameter. The size of the binding point grayscale of the standard pixel and the number of the binding point grayscale of the standard pixel are preset before step 204.

[0093] The standard pixel is preset, and the standard position parameter of the standard pixel and the number of the standard pixel can be determined according to the position parameter of the pixel to be compensated and the number of the pixel to be compensated.

[0094] The second compensation grayscale is preset, and the step of setting the second compensation grayscale is before step S202. For example, step S2002 of setting the second compensation grayscale may specifically include:

[0095] Step S20021, a test display image of the first display panel 101 during the display process is photographed by a high-definition camera (such as a CCD), and display parameters of the first display panel 101 are obtained according to the test display image. The display parameters of the first display panel 101 include the full display grayscale of the first display panel 101 and the grayscale value and brightness value of each pixel in the test display image.

[0096] Step S20022, obtain the grayscale value and brightness value of the standard pixel in the test display image, and obtain the compensated grayscale corresponding to each standard pixel based on the Demura compensation technology, that is, the second compensated grayscale. The size of the second compensated grayscale is related to the standard position parameter and the size of the grayscale to be displayed by the standard pixel.

[0097] In some embodiments provided in this application, Figure 5 As shown, step S204 also includes the following steps:

[0098] Step S2042: acquiring a target standard position parameter from a plurality of standard position parameters based on the position parameter to be compensated. The target standard position parameter is a standard position parameter corresponding to the position parameter to be compensated, and there may be a plurality of target standard position parameters.

[0099] For example, based on the position parameter to be compensated, multiple target standard position parameters are obtained from multiple standard position parameters, the minimum value of the multiple target standard position parameters is less than or equal to the position parameter to be compensated, and the maximum value of the multiple target standard position parameters is greater than or equal to the position parameter to be compensated. In this way, the position of the pixel to be compensated on the first display panel 101 is located in the area defined by the maximum value of the multiple target standard position parameters and the minimum value of the multiple target standard position parameters.

[0100] In some embodiments provided in this application, step S2042 may specifically include:

[0101] The number of target standard position parameters obtained from the plurality of standard position parameters based on the position parameter to be compensated is four, and the four target standard position parameters correspond one-to-one to the first standard pixel, the second standard pixel, the third standard pixel and the fourth standard pixel respectively.

[0102] The first standard pixel and the second standard pixel are located in the same pixel row of the first display panel, the third standard pixel and the fourth standard pixel are located in the same pixel row of the first display panel, the first standard pixel and the third standard pixel are located in the same pixel column of the first display panel, and the second standard pixel and the fourth standard pixel are located in the same pixel column of the first display panel. In addition, along the pixel row direction of the first display panel, the target standard position parameter of the first standard pixel is less than the position parameter to be compensated and the target standard position parameter of the second standard pixel is greater than the position parameter to be compensated; and along the pixel column direction of the first display panel, the target standard position parameter of the first standard pixel is greater than the position parameter to be compensated and the target standard position parameter of the third standard pixel is less than the position parameter to be compensated.

[0103] like Figure 6 As shown, the first standard pixel P s1 and the second standard pixel P s2 The third standard pixel P is located in the same pixel row of the first display panel 101, that is, the m1th row. s3 and the fourth standard pixel P s4 The first standard pixel P is located in the same pixel row of the first display panel 101, that is, the m2th row. s1 The second standard pixel P and the third standard pixel P are located in the same pixel column of the first display panel 101, that is, the n1th column. s2 The fourth standard pixel is located in the same pixel column of the first display panel 101, ie, column n2.

[0104] Along the pixel row direction d1 of the liquid crystal display panel, the first standard pixel P s1 The standard position parameter of the second standard pixel P is less than the position parameter to be compensated and s2 The standard position parameter of is greater than the position parameter to be compensated. Along the pixel column direction d2 of the liquid crystal display panel, the first standard pixel P s1 The standard position parameter is greater than the position parameter to be compensated and the third standard pixel P s3 The standard position parameter is smaller than the position parameter to be compensated.

[0105] Based on the first standard pixel P s1 , the second standard pixel P s2 , the third standard pixel P s3 and the target standard position parameters corresponding to the fourth standard pixels, a rectangular area a can be defined in the first display panel 101. 1234 , rectangular area a 1234 The plurality of pixels located in the m1th row to the m2th row and in the n1th column to the n2th column are included, so that the pixels to be compensated of the first display panel 101 are located in the rectangular area a 1234 The first standard pixel P s1 , the second standard pixel Ps2 , the third standard pixel P s3 and the fourth standard pixel P s4 It may be a first pixel located in the first display area A1 or a pixel located in the second display area A2.

[0106] In this way, the position of the pixel to be compensated on the first display panel 101 is located at the first standard pixel P s1 , the second standard pixel P s2 , the third standard pixel P s3 and the fourth standard pixel P s4 The rectangular area a defined by 1234 When there are multiple pixels to be measured, the multiple pixels to be compensated may all be located in the rectangular area a. 1234 When there are multiple pixels to be tested and the position parameters to be compensated of the multiple pixels to be tested are relatively scattered in the first display area A1, at least one of the multiple pixels to be tested may be located in another rectangular area, and the first target compensation grayscale of the corresponding pixel to be tested is determined according to the standard position parameters of four standard pixels that define the other rectangular area and the second compensation grayscale of the four standard pixels.

[0107] Step S2044, obtaining a second target compensation grayscale from a plurality of second compensation grayscales based on the first grayscale and the target standard position parameter. The second target compensation grayscale is a second compensation grayscale corresponding to the target standard position parameter, and the number of the second target compensation grayscales is determined by the number of target standard pixels.

[0108] In some embodiments provided in the present application, when the display grayscale of the standard pixel includes the full grayscale of the standard pixel, any grayscale in the full grayscale has a corresponding second compensation grayscale, so the second target compensation grayscale of the preset first grayscale is directly obtained.

[0109] In some embodiments provided in the present application, when the display grayscale of the standard pixel includes the binding point grayscale of the standard pixel, such as Figure 7 As shown, step S2044 further specifically includes:

[0110] Step S20441, based on the first grayscale and the target standard position parameter, a second compensation grayscale of a target binding point grayscale is obtained from a plurality of second compensation grayscales. The target binding point grayscale is a binding point grayscale corresponding to the first grayscale.

[0111] Specifically, when the grayscale value of the first grayscale is between the grayscale value of the endpoint grayscale and the grayscale value of the binding point grayscale adjacent to the endpoint grayscale, the binding point grayscale adjacent to the endpoint grayscale is the target binding point grayscale. At this time, the endpoint grayscale is the minimum display grayscale of the standard pixel. Taking the grayscale display range of the first display panel 101 as 256 grayscales (gray0 to gray255) as an example, the minimum display grayscale of the standard pixel is gray0. When the grayscale value of the first grayscale is between the grayscale values ​​of two adjacent binding point grayscales, the two adjacent binding point grayscales are both the target binding point grayscales. When the grayscale value of the first grayscale is between the binding point grayscale and the endpoint grayscale adjacent to the binding point grayscale, the binding point grayscale adjacent to the endpoint grayscale is the target binding point grayscale. At this time, the endpoint grayscale is the maximum display grayscale of the standard pixel. Taking the grayscale display range of the first display panel 101 as 256 levels of grayscale (gray0 to gray255) as an example, the maximum display grayscale of the standard pixel is gray255.

[0112] Step S20442, obtaining a second target compensation grayscale according to a fourth preset relationship, the first grayscale, the target binding point grayscale, and the second compensation grayscale of the target binding point grayscale. The fourth preset relationship is:

[0113]

[0114] In the fourth preset relational expression (3), combined with Figure 8 As shown, val0 is the second target compensation grayscale, gray0 is the first grayscale, gray a1 Bind some grayscale to the first target, gray a2 is the second target binding point grayscale, val1 is the second compensation grayscale corresponding to the first target binding point grayscale, val2 is the second compensation grayscale corresponding to the second target binding point grayscale, the first target binding point grayscale is the binding point grayscale with a grayscale value less than or equal to the first grayscale, and the second target binding point grayscale is the binding point grayscale with a grayscale value greater than or equal to the first grayscale.

[0115] Specifically, when the grayscale value of the first grayscale is between the grayscale value of the endpoint grayscale and the grayscale value of the binding point grayscale adjacent to the endpoint grayscale, the binding point grayscale adjacent to the endpoint grayscale is the second target binding point grayscale. At this time, the endpoint grayscale is the minimum display grayscale of the standard pixel. Taking the grayscale display range of the first display panel 101 as 256 grayscale levels (gray0 to gray255) as an example, the minimum display grayscale of the standard pixel is gray0. When the grayscale value of the first grayscale is between the grayscale values ​​of two adjacent binding point grayscales, the binding point grayscale with the smaller grayscale value of the two adjacent binding point grayscales is the first target binding point grayscale, and the binding point grayscale with the larger grayscale value of the two adjacent binding point grayscales is the second target binding point grayscale. When the grayscale value of the first grayscale is between the binding point grayscale and the endpoint grayscale adjacent to the binding point grayscale, the binding point grayscale adjacent to the endpoint grayscale is the first target binding point grayscale. At this time, the endpoint grayscale is the maximum display grayscale of the standard pixel. Taking the grayscale display range of the first display panel 101 as 256 levels of grayscale (gray0 to gray255) as an example, the maximum display grayscale of the standard pixel is gray255.

[0116] Step S2046, calculating the first target compensation grayscale according to the position parameter to be compensated, the target standard position parameter and the second target compensation grayscale.

[0117] Taking the example that the number of target standard position parameters obtained from multiple standard position parameters based on the position parameter to be compensated is four, step S2046 specifically includes: calculating the first target compensation grayscale according to the first preset relationship, the position parameter to be compensated, the four target standard position parameters and the four second target compensation grayscales. The first preset relationship is:

[0118]

[0119] In the first preset relational expression (4), val3 is the first target compensation grayscale of the pixel to be compensated, val u is the first reference compensation data calculated based on the second target compensation grayscale of the first standard pixel and the second target compensation grayscale of the second standard pixel, val d is the second reference compensation data calculated based on the second target compensation grayscale of the third standard pixel and the second target compensation grayscale of the fourth standard pixel, H ud is the distance between the standard position parameter of the first standard pixel and the standard position parameter of the third standard pixel in the pixel column direction d2 of the first display panel 101, H u3 is the distance between the standard position parameter of the first standard pixel and the target compensation position parameter in the pixel column direction d2 of the first display panel 101 .

[0120] When the position parameter to be compensated is the same as one of the multiple standard position parameters, the second target compensation grayscale corresponding to the position parameter to be compensated can be directly assigned to the first target compensation grayscale. Figure 4 As shown, the first target compensation grayscale calculation unit 403 is used to calculate the grayscale compensation grayscale based on the first preset relationship, four target standard position parameters (i.e., the first standard pixel P s1 , the second standard pixel P s2 , the third standard pixel P s3 and the fourth standard pixel P s4 The first target compensation grayscale is calculated based on the target standard position parameters corresponding to each pixel, the second target compensation grayscales of the four standard pixels, and the position parameters to be compensated of the pixel to be compensated.

[0121] In step S2046, the first reference compensation data is calculated based on the second preset relationship. The second preset relationship is:

[0122]

[0123] In the second preset relationship (5), val u is the first reference compensation data, val lu The second target compensation grayscale of the first standard pixel, val ru is the second target compensation grayscale of the second standard pixel, W 3l is the distance between the position parameter to be compensated and the target standard position parameter of the first standard pixel in the pixel row direction d1 of the first display panel 101, W rl is the distance between the target standard position parameter of the second standard pixel and the target standard position parameter of the first standard pixel in the pixel row direction d1 of the first display panel 101 .

[0124] In step S2046, the second reference compensation data is calculated based on a third preset relationship. The third preset relationship is:

[0125]

[0126] In the third preset relation (6), val d is the second reference compensation data, val ld is the second compensated grayscale of the third standard pixel, val rd is the second compensated gray scale of the fourth standard pixel. 3l is the distance between the target compensation position parameter and the standard position parameter of the third standard pixel in the pixel row direction d1 of the first display panel 101, W rlis the distance between the standard position parameter of the fourth standard pixel and the standard position parameter of the third standard pixel in the pixel row direction d1 of the first display panel 101 .

[0127] Since the first standard pixel and the third standard pixel are pixels located in the same column, and the second standard pixel and the fourth standard pixel are pixels located in the same column, the distance between the position parameter to be compensated and the target standard position parameter of the third standard pixel in the pixel row direction d1 of the liquid crystal display panel is the same as the distance between the position parameter to be compensated and the target standard position parameter of the first standard pixel in the pixel row direction d1 of the liquid crystal display panel, and the distance between the target standard position parameter of the fourth standard pixel and the target standard position parameter of the third standard pixel in the pixel row direction d1 of the liquid crystal display panel is the same as the distance between the target standard position parameter of the second standard pixel and the target standard position parameter of the first standard pixel in the pixel row direction d1 of the liquid crystal display panel.

[0128] That is to say, when the position parameter to be compensated is different from any of the four standard position parameters, the first target compensation grayscale of the pixel to be compensated can be calculated based on the first preset relationship (4), the second preset relationship (5) and the third preset relationship (6) in a bilinear interpolation manner according to the second target compensation grayscales corresponding to the first standard pixel, the second standard pixel, the third standard pixel and the fourth standard pixel. In this way, the purpose of gradually compensating the pixel to be compensated can be achieved, and the appearance of an obvious brightness boundary in the first display area A1 after the grayscale compensation of the pixel to be compensated can be avoided.

[0129] Step S206 , performing grayscale compensation on the pixel to be compensated based on the first target compensation grayscale.

[0130] Specifically, in step S206, the sum of the initial grayscale of the pixel to be compensated obtained from the image to be displayed and the first target compensation grayscale may be determined as the target grayscale of the pixel to be compensated, and the pixel to be compensated may be controlled to be displayed based on the calculated target grayscale.

[0131] In the splicing display device provided in the present application, the initial grayscale, the first target compensation grayscale and the target grayscale all refer to the color data input to the pixel to be compensated, that is, the grayscale information corresponding to the R channel, the G channel and the B channel. For example, the initial display grayscale of the pixel to be compensated obtained from the image to be displayed is R, G, B = (30, 30, 30), and the first target compensation grayscale is R, G, B = (10, 10, 10), then the target grayscale is R, G, B = (30 + 10, 30 + 10, 30 + 10), that is, the target grayscale is R, G, B = (40, 40, 40), so that the target compensation pixel is controlled to be displayed based on R, G, B = (40, 40, 40).

[0132] The brightness compensation method 200 provided in the present application first determines the pixels to be compensated and the first grayscale of the pixels to be compensated in the first display area A1 of the first display panel 101 according to the image to be displayed of the spliced ​​display device 100 and the pre-set position parameters to be compensated, and then calculates the first target compensation grayscale of the pixels to be compensated according to the first grayscale, the position parameters to be compensated, the standard position parameters of the standard pixels and the second compensation grayscale of the standard pixels, and finally performs grayscale compensation on the pixels to be compensated according to the first target compensation grayscale, so that any pixel to be compensated located in the first display area can be compensated separately. In addition, since the first target compensation grayscale required by each pixel to be compensated in each frame of the image to be displayed is adaptively adjusted based on the brightness compensation method 200 provided in the present application, adaptive compensation can be performed for each frame of the image to be displayed of the spliced ​​display device, thereby eliminating the shadow gap existing in the boundary area corresponding to the first display panel 101 and the second display panel 102 of each frame of the image to be displayed, thereby improving the brightness uniformity of the spliced ​​display device.

[0133] The present application also provides a splicing display device, such as Fig. 9 As shown, the spliced ​​display device 100 includes two first display panels 101 and a second display panel 102 disposed between the two first display panels 101 . The spliced ​​display device 100 also includes a first grayscale acquisition module 20 , a compensation data storage module 30 and a grayscale compensation module 40 .

[0134] In the first display panel 101, as Figure 1 As shown, the first display panel 101 has a first display area A1 and a second display area A2, and the first display area A1 is located on the side of the second display area A2 close to the second display panel 102. The first display area A1 and the second display area A2 are each provided with a plurality of pixels, and the pixels located in the first display area A1 are first pixels.

[0135] The first grayscale acquisition module 20 is used to acquire the first grayscale of the pixel to be compensated based on the image to be displayed of the spliced ​​display device 100 and the preset position parameters to be compensated.

[0136] The spliced ​​display device 100 has stored the position parameters to be compensated in the first grayscale acquisition module 20 or other modules with storage function of the spliced ​​display device 100 before leaving the factory, so that the first grayscale acquisition module 20 obtains the position parameters to be compensated and determines the first grayscale of the pixel to be compensated according to the image to be displayed. In some embodiments provided in the present application, the first grayscale is the initial grayscale corresponding to the pixel to be compensated in the image to be displayed, and in other embodiments provided in the present application, the first grayscale is the grayscale obtained by presetting the grayscale adjustment formula (1) from the initial grayscale corresponding to the pixel to be compensated in the image to be displayed.

[0137] The compensation data storage module 30 is used to store a plurality of preset standard position parameters of standard pixels, display grayscales of standard pixels and second compensation grayscales of a plurality of standard pixels, wherein the second compensation grayscale corresponds to the standard position parameters and the display grayscale.

[0138] The display grayscale of the standard pixel stored in the compensation data storage module 30 may be the full grayscale of the standard pixel or the binding point grayscale of the standard pixel.

[0139] When the display grayscale of the standard pixel stored in the compensation data storage module 30 is the full grayscale of the standard pixel, the second compensation grayscales corresponding to the full grayscale of the standard pixel and the standard position parameter are all stored in the compensation data storage module 30. When the display grayscale of the standard pixel stored in the compensation data storage module 30 is the binding point grayscale of the standard pixel, the second compensation grayscales corresponding to the binding point grayscale of the standard pixel and the standard position parameter are all stored in the compensation data storage module 30.

[0140] In the splicing display device 100 provided in the present application, the brightness of the shadow gap formed by the first display panel 101 and the second display panel 102 under different grayscale images is different, so the brightness required to compensate for the pixels to be compensated under different display images is also different. By presetting the binding point grayscale of the standard pixel and presetting the second compensation grayscale corresponding to the binding point grayscale, when the first grayscale of the pixel to be compensated is the binding point grayscale, the first target compensation grayscale of the pixel to be compensated is directly calculated according to the second compensation grayscale corresponding to the binding point grayscale. When the first grayscale of the pixel to be compensated is not the binding point grayscale, the first target compensation grayscale of the pixel to be compensated can be obtained based on the binding point grayscale corresponding to the first grayscale, the second compensation grayscale corresponding to the binding point grayscale and the calculation method of linear interpolation. In this way, the compensation data storage module 30 does not need to store the second compensation grayscales corresponding to the full grayscales of the standard pixel, which can save the storage space required by the compensation data storage module 30.

[0141] The spliced ​​display device 100 has already stored the display grayscale of the standard pixel and the second compensation grayscale corresponding to the display grayscale and the standard position parameter in the compensation data storage module 30 before leaving the factory, so that when the spliced ​​display device 100 performs grayscale compensation on the pixel to be compensated, the corresponding second compensation grayscale stored in the compensation data storage module 30 is directly called from the compensation data storage module 30 according to the first grayscale corresponding to the pixel to be compensated in each frame of the image to be displayed.

[0142] The second compensation grayscale is a compensation grayscale corresponding to a standard pixel obtained by the spliced ​​display device 100 based on the Demura compensation technology before leaving the factory. The size of the second compensation grayscale is related to the standard position parameter and the size of the grayscale to be displayed by the standard pixel.

[0143] The grayscale compensation module 40 obtains the first grayscale of the pixel to be compensated from the first grayscale acquisition module 20. The grayscale compensation module 40 is also electrically connected to the compensation data storage module 30, and is used to obtain the standard position parameter and the second compensated grayscale from the compensation data storage module 30 according to the first grayscale and the position parameter to be compensated.

[0144] The grayscale compensation module 40 calculates a first target compensation grayscale of the pixel to be compensated according to the first grayscale, the position parameter to be compensated, the standard position parameter and the second compensation grayscale, and performs grayscale compensation on the pixel to be compensated based on the first target compensation grayscale.

[0145] In some embodiments provided in this application, Fig.10 As shown, the grayscale compensation module 40 includes a target standard position parameter acquisition unit 401 , a second target compensation grayscale acquisition unit 402 , a first target compensation grayscale calculation unit 403 and a compensation processing unit 404 .

[0146] The target standard position parameter acquisition unit 401 is used to acquire the target standard position parameter corresponding to the position parameter to be compensated from the compensation data storage module 30 based on the position parameter to be compensated. The target standard position parameter is the standard position parameter of the target standard pixel, and the target standard pixel is the standard pixel corresponding to the pixel to be compensated.

[0147] The second target compensation grayscale acquisition unit 402 is used to acquire the first grayscale of the pixel to be compensated from the first grayscale acquisition module 20 and the target standard position parameter from the target standard position parameter acquisition unit 401, and acquire the second target compensation grayscale from the compensation data storage module 30 based on the first grayscale and the target standard position parameter. The second target compensation grayscale is a second compensation grayscale corresponding to the first grayscale and the target standard position parameter.

[0148] The first target compensation grayscale calculation unit 403 is used to obtain the second target compensation grayscale from the second target compensation grayscale acquisition unit 402 and to obtain the target standard position parameter from the target standard position parameter acquisition unit 401, and calculates the first target compensation grayscale of the pixel to be compensated based on the position parameter to be compensated, the target standard position parameter and the second target compensation grayscale.

[0149] The compensation processing unit 404 is configured to perform grayscale compensation on the pixel to be compensated according to the first target compensation grayscale.

[0150] Specifically, the compensation processing unit 404 obtains the initial grayscale of the pixel to be compensated from the image to be displayed and obtains the first target compensation grayscale from the first target compensation grayscale calculation unit 403, calculates the sum of the first target compensation grayscale and the initial grayscale, and assigns the sum of the first target compensation grayscale and the initial grayscale as the target grayscale of the pixel to be compensated, and controls the pixel to be compensated to be displayed based on the target grayscale. In the spliced ​​display device provided in the present application, the initial grayscale, the first target compensation grayscale, and the target grayscale all refer to the color data input to the pixel to be compensated, that is, the grayscale information corresponding to the R channel, the G channel, and the B channel respectively.

[0151] For example, the initial grayscale of the pixel to be compensated obtained by the compensation processing unit 404 from the image to be displayed of the splicing display device 100 is R, G, B=(30, 30, 30), and the first target compensation grayscale of the pixel to be compensated obtained by the compensation processing unit 404 from the first target compensation grayscale calculation unit 403 is R, G, B=(10, 10, 10), then the target grayscale is R, G, B=(30+10, 30+10, 30+10), that is, the target grayscale is R, G, B=(40, 40, 40), so that the compensation processing unit 404 controls the pixel to be compensated to be displayed based on R, G, B=(40, 40, 40).

[0152] The spliced ​​display device 100 provided in the present application performs grayscale compensation on any pixel to be compensated in the first display area A1 (i.e., the boundary area of ​​the first display panel 101) of the first display panel 101 separately, and adaptively adjusts the first target compensation grayscale required by the pixel to be compensated according to multiple frames of images to be displayed of the spliced ​​display device to perform real-time grayscale compensation on the corresponding pixel to be compensated, thereby adjusting the brightness of the first display area A1 in real time according to the image to be displayed, reducing or even solving the visibility of the shadow gap in the spliced ​​display device, thereby visually eliminating the splicing seams in the spliced ​​display device.

[0153] In the spliced ​​display device 100 provided in the present application, the first grayscale acquisition module 20, the compensation data storage module 30 and the grayscale compensation module 40 can all be stored in the memory of the spliced ​​display device 100, and executed by at least one or more processors of the spliced ​​display device 100, so as to realize the grayscale compensation function for the pixels to be compensated in the first display area A1 in the first display panel 101. The module referred to in the present application refers to a series of computer-readable instruction segments that can be executed by at least one processor and can complete fixed functions, which are stored in the memory.

[0154] The memory of the spliced ​​display device 100 can be used to store the program code of the computer program and various data. The memory can include a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD ROM) or other optical disc memory, magnetic disk memory, magnetic tape memory, or any other non-volatile computer-readable storage medium capable of carrying or storing data.

[0155] The processor of the spliced ​​display device 100 may be composed of an integrated circuit. For example, it may be composed of a single packaged integrated circuit, or may be composed of multiple packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and a combination of various control chips. Among them, at least one processor is the control core (ControlUnit) of the spliced ​​display device 100, which uses various interfaces and lines to connect the various components of the entire spliced ​​display device 100, and executes various functions and processes data of the spliced ​​display device 100 by executing programs, modules, or instructions stored in the memory, and calling data stored in the memory.

[0156] Of course, the present application may have many other embodiments. Without departing from the spirit and essential points of the present application, technicians familiar with the field may make various corresponding changes and modifications based on the present application, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present application.

Claims

1. A brightness compensation method for a spliced ​​display device, characterized in that: The spliced ​​display device includes two first display panels and a second display panel disposed between the two first display panels, the first display panel includes a first display area and a second display area, the first display area is located on a side of the second display area close to the second display panel, the first display area is provided with a plurality of first pixels, and the brightness compensation method includes: Acquire a first grayscale of a pixel to be compensated according to an image to be displayed of the spliced ​​display device and a position parameter to be compensated of the pixel to be compensated, wherein the pixel to be compensated is at least one of the plurality of first pixels; Calculating a first target compensation grayscale according to the first grayscale, the position parameter to be compensated, a plurality of preset standard position parameters of standard pixels, and a plurality of preset second compensation grayscales corresponding to the display grayscale of the standard pixels; Grayscale compensation is performed on the pixel to be compensated based on the first target compensation grayscale.

2. The brightness compensation method of the spliced ​​display device according to claim 1, characterized in that: The step of calculating the first target compensation grayscale according to the first grayscale, the position parameter to be compensated, the preset standard position parameters of a plurality of standard pixels, and the preset plurality of second compensation grayscales corresponding to the display grayscale of the standard pixels comprises: Acquiring a target standard position parameter from the plurality of standard position parameters based on the position parameter to be compensated; Acquire a second target compensation grayscale from a plurality of second compensation grayscales based on the first grayscale and the target standard position parameter; The first target compensation grayscale is calculated according to the to-be-compensated position parameter, the target standard position parameter and the second target compensation grayscale.

3. The brightness compensation method of the spliced ​​display device according to claim 2, characterized in that: The step of acquiring a target standard position parameter from a plurality of standard position parameters based on the position parameter to be compensated comprises: Based on the position parameter to be compensated, multiple target standard position parameters are obtained from the multiple standard position parameters, the minimum value of the multiple target standard position parameters is less than or equal to the position parameter to be compensated, and the maximum value of the multiple target standard position parameters is greater than or equal to the position parameter to be compensated.

4. The brightness compensation method of the spliced ​​display device according to claim 3, characterized in that: The number of the target standard position parameters obtained from the plurality of standard position parameters based on the position parameter to be compensated is four, and the four target standard position parameters correspond one-to-one to the first standard pixel, the second standard pixel, the third standard pixel, and the fourth standard pixel respectively; The first standard pixel and the second standard pixel are located in the same pixel row of the first display panel, the third standard pixel and the fourth standard pixel are located in the same pixel row of the first display panel, the first standard pixel and the third standard pixel are located in the same pixel column of the first display panel, and the second standard pixel and the fourth standard pixel are located in the same pixel column of the first display panel; Furthermore, along the pixel row direction of the first display panel, the target standard position parameter of the first standard pixel is smaller than the position parameter to be compensated and the target standard position parameter of the second standard pixel is larger than the position parameter to be compensated; Furthermore, along the pixel column direction of the first display panel, the target standard position parameter of the first standard pixel is greater than the position parameter to be compensated and the target standard position parameter of the third standard pixel is less than the position parameter to be compensated.

5. The brightness compensation method of the spliced ​​display device according to claim 4, characterized in that: The first target compensation grayscale is calculated according to a first preset relationship, the position parameter to be compensated, the four target standard position parameters and the four second target compensation grayscales, wherein the first preset relationship is: Among them, val3 is the first target compensation grayscale, val u is the first reference compensation data calculated based on the second target compensation grayscale of the first standard pixel and the second target compensation grayscale of the second standard pixel, val d is the second reference compensation data calculated based on the second target compensation grayscale of the third standard pixel and the second target compensation grayscale of the fourth standard pixel, H ud is the distance between the target standard position parameter of the first standard pixel and the target standard position parameter of the third standard pixel in the pixel column direction of the first display panel, H u3 is the distance between the target standard position parameter of the first standard pixel and the position parameter to be compensated in the pixel column direction of the first display panel.

6. The brightness compensation method of the spliced ​​display device according to claim 5, characterized in that: The first reference compensation data is calculated based on a second preset relationship, and the second preset relationship is: Among them, the val u is the first reference compensation data, val lu The second target compensation grayscale of the first standard pixel, val ru is the second target compensated grayscale of the second standard pixel, W 3l is the distance between the position parameter to be compensated and the target standard position parameter of the first standard pixel in the pixel row direction of the first display panel, W rl is a distance between a target standard position parameter of the second standard pixel and a target standard position parameter of the first standard pixel in a pixel row direction of the first display panel; and / or, The second reference compensation data is calculated based on a third preset relationship, and the third preset relationship is: Among them, the val d is the second reference compensation data, val ld is the second target compensation grayscale of the third standard pixel, val rd The second target compensated grayscale is the fourth standard pixel.

7. The brightness compensation method of a spliced ​​display device according to claim 2, characterized in that: The display grayscale includes the binding point grayscale of the standard pixel; The step of acquiring a second target compensation grayscale from a plurality of second compensation grayscales based on the first grayscale and the target standard position parameter comprises: Acquire the second compensation grayscale of a target binding point grayscale from a plurality of second compensation grayscales based on the first grayscale and the target standard position parameter, the target binding point grayscale being the binding point grayscale corresponding to the first grayscale; The second target compensation grayscale is obtained according to a fourth preset relationship, the first grayscale, the target binding point grayscale and the second compensation grayscale of the target binding point grayscale, wherein the fourth preset relationship is: Among them, val0 is the second target compensation grayscale, gray0 is the first grayscale, gray a1 Bind some grayscale to the first target, gray a2 is the second target binding point grayscale, val1 is the second compensation grayscale corresponding to the first target binding point grayscale, val2 is the second compensation grayscale corresponding to the second target binding point grayscale, the first target binding point grayscale is the binding point grayscale corresponding to the first grayscale and whose grayscale value is less than or equal to the first grayscale, and the second target binding point grayscale is the binding point grayscale corresponding to the first grayscale and whose grayscale value is greater than or equal to the first grayscale.

8. The brightness compensation method of a spliced ​​display device according to any one of claims 1 to 7, characterized in that: The step of obtaining the first grayscale of the pixel to be compensated according to the image to be displayed of the spliced ​​display device and the position parameters to be compensated of the pixel to be compensated comprises: Acquire the initial gray scale of the pixel to be compensated according to the image to be displayed of the spliced ​​display device and the position parameter to be compensated; The grayscale value of the initial grayscale is reduced to obtain the first grayscale.

9. The brightness compensation method of the spliced ​​display device according to claim 8, characterized in that: The step of reducing the grayscale value of the initial grayscale to obtain the first grayscale comprises: The grayscale value of the initial grayscale is reduced according to a grayscale adjustment formula to obtain the first grayscale, and the grayscale adjustment formula is: gray1=gray2*a0; Among them, gray2 is the initial grayscale, gray1 is the first grayscale, a0 is an adjustment coefficient, and the adjustment coefficient is a constant less than 1 and greater than 0.

10. The brightness compensation method of the spliced ​​display device according to claim 9, characterized in that: The adjustment coefficient also satisfies a fifth preset relationship, which is: Among them, gray r is the preset maximum value of the grayscale of the binding point of the first display panel, gray m is the maximum value of the display grayscale of the first display panel.

11. A splicing display device, characterized in that: The spliced ​​display device includes two first display panels and a second display panel disposed between the two first display panels, the first display panel includes a first display area and a second display area, the first display area is located on a side of the second display area close to the second display panel, and the first display area is provided with a plurality of first pixels, and the spliced ​​display device further includes: A first grayscale acquisition module, the first grayscale acquisition module is used to acquire a first grayscale of a pixel to be compensated based on the image to be displayed of the spliced ​​display device and a preset position parameter to be compensated, the pixel to be compensated being at least one of the plurality of first pixels; A compensation data storage module, the compensation data storage module is used to store a plurality of pre-set standard position parameters of standard pixels, display grayscales of the standard pixels, and a plurality of second compensation grayscales of the standard pixels; A grayscale compensation module is used to calculate a first target compensation grayscale of the pixel to be compensated according to the first grayscale, the position parameter to be compensated, the standard position parameter and the second compensation grayscale, and perform grayscale compensation on the pixel to be compensated based on the first target compensation grayscale.

12. The splicing display device according to claim 11, characterized in that: The grayscale compensation module comprises: A target standard position parameter acquisition unit, the target standard position parameter acquisition unit is used to acquire the target standard position parameter from the compensation data storage module based on the position parameter to be compensated; a second target compensation grayscale acquisition unit, the second target compensation grayscale acquisition unit being used to acquire a second target compensation grayscale from the compensation data storage module based on the first grayscale and the target standard position parameter; A first target compensation grayscale calculation unit, the first target compensation grayscale calculation unit is used to calculate the first target compensation grayscale based on the to-be-compensated position parameter, the target standard position parameter and the second target compensation grayscale; A compensation processing unit, wherein the compensation processing unit is used to perform grayscale compensation on the pixel to be compensated according to the first target compensation grayscale.

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