Compensation method and compensation device for tiled display panel

Abstract

The invention discloses a compensation method and a compensation device for a tiled display panel. The compensation method of the tiled display panel comprises the following steps: acquiring a current display picture of each tiled sub-screen in the tiled display panel; according to the current display picture of each spliced sub-screen and the predetermined display brightness of each spliced sub-screen under different gray scales and different display areas, determining the equivalent display brightness of each spliced sub-screen when the current display picture is displayed; determining an impedance compensation coefficient of each spliced sub-screen according to the target display brightness and the equivalent display brightness of each spliced sub-screen; and compensating the impedance on the power signal transmission path of the spliced sub-screen according to the impedance compensation coefficient. According to the display panel, the difference of power supply signals among different spliced sub-screens is reduced, the display unevenness among the spliced sub-screens is improved, and the display effect of the display panel is improved.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a compensation method and compensation device for splicing display panels. Background Technology

[0002] With the development of display technology, video wall displays have received widespread attention. However, existing video wall displays are prone to uneven display between different screens, affecting the final display effect. Summary of the Invention

[0003] This invention provides a compensation method and device for splicing display panels to reduce the difference in power signals between different splicing sub-screens, improve the uneven display between splicing sub-screens, and enhance the display effect of the display panel.

[0004] According to one aspect of the present invention, a compensation method for a spliced ​​display panel is provided, the compensation method for the spliced ​​display panel comprising:

[0005] Get the current display screen of each sub-screen in the splicing display panel;

[0006] Based on the current display screen of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen under different gray levels and display areas, determine the equivalent display brightness of each splicing sub-screen when displaying the current display screen;

[0007] The impedance compensation coefficient of each splicing sub-screen is determined based on the target display brightness and equivalent display brightness of each splicing sub-screen.

[0008] The impedance of the power signal transmission path of the splicing sub-screen is compensated according to the impedance compensation coefficient.

[0009] Furthermore, based on the current display image of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen at different gray levels and display areas, the equivalent display brightness of each splicing sub-screen when displaying the current display image is determined, including:

[0010] The display grayscale of each pixel unit in the splicing sub-screen, the number of pixel units corresponding to each display grayscale, and the number of light-emitting pixel units are determined based on the current display screen; wherein, a pixel unit includes at least one sub-pixel;

[0011] Based on the number of light-emitting pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each splicing sub-screen under different grayscale and display areas, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined.

[0012] The equivalent display brightness of the splicing sub-screen when displaying the current display image is determined based on the predicted display brightness corresponding to each display grayscale and the number of pixel units corresponding to each display grayscale.

[0013] Furthermore, the display brightness of each splicing sub-screen at different gray levels and display areas includes: the display brightness of each splicing sub-screen at different gray levels and display areas when displaying a monochrome display of each color.

[0014] When the current display screen is a monochrome display screen of a preset color, or when sub-pixels of the same color in the splicing sub-screen are connected to the same power signal line, or when sub-pixels of different colors in the splicing sub-screen are connected to different power signal lines, each pixel unit includes a sub-pixel of a preset color, and the display grayscale of the pixel unit is the display grayscale of the sub-pixel of the preset color.

[0015] Based on the number of luminous pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each splicing sub-screen at different grayscales and display areas, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined, including:

[0016] Based on the number of light-emitting pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each color monochrome display screen under different grayscale levels and different display areas, the predicted display brightness corresponding to each display grayscale level in the splicing sub-screen is determined.

[0017] Furthermore, the display brightness of each splicing sub-screen at different gray levels and display areas includes: the display brightness of each splicing sub-screen at different gray levels and display areas when displaying mixed color display images;

[0018] When sub-pixels of different colors in a splicing sub-screen are connected to the same power signal line, and the current display screen is a mixed color display screen, each pixel unit includes at least two sub-pixels with different emitting colors, and the display grayscale of the pixel unit is the equivalent display grayscale of at least two sub-pixels with different emitting colors.

[0019] Based on the number of luminous pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each splicing sub-screen at different grayscales and display areas, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined, including:

[0020] Based on the number of light-emitting pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness at different grayscales and display areas when the splicing sub-screen displays a mixed color display, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined.

[0021] Optionally, the display brightness of each splicing sub-screen under different gray levels and display areas includes: the display brightness of the display panel under different gray levels and display areas when each splicing sub-screen displays a white display image.

[0022] Furthermore, based on the number of luminous pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each splicing sub-screen at different grayscales and display areas, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined, including:

[0023] The equivalent display area of ​​the splicing sub-screen is determined based on the total number of light-emitting pixel units in the splicing sub-screen;

[0024] The predicted display brightness of each display gray level is determined based on the equivalent display area, the display gray level of each pixel unit, and the pre-determined display brightness of the spliced ​​sub-screens under different gray levels and display areas.

[0025] Optionally, the predicted display brightness for each display grayscale is determined based on the equivalent display area, the display grayscale of each pixel unit, and the pre-determined display brightness of the spliced ​​sub-screens at different grayscales and display areas, including:

[0026] Based on the predetermined display brightness of the splicing sub-screens under different gray levels and display areas, the equivalent brightness when all pixel units in the equivalent display area display the display gray level is determined, and the equivalent brightness is determined as the predicted display brightness corresponding to the display gray level.

[0027] Optionally, based on the predetermined display brightness of the spliced ​​sub-screens at different gray levels and display areas, the equivalent brightness when all pixel units in the equivalent display area display gray levels includes:

[0028] Based on the predetermined display brightness of the spliced ​​sub-screens at different gray levels and display areas, the equivalent brightness when all pixel units in the equivalent display area display gray levels is determined by an interpolation algorithm.

[0029] Furthermore, the equivalent display brightness of the splicing sub-screen when displaying the current display image is determined based on the predicted display brightness of each pixel unit and the number of pixel units corresponding to each preset brightness, including:

[0030] The equivalent display brightness is determined using the following formula:

[0031] L equivalent = L1*(n1 / N) + L2*(n2 / N) + ... + Lm*(nm / N);

[0032] Where L1 is the first predicted display brightness, n1 is the number of pixel units corresponding to the first predicted display brightness, L2 is the second predicted display brightness, n2 is the number of pixel units corresponding to the second predicted display brightness, Lm is the m-th predicted display brightness, nm is the number of pixel units corresponding to the m-th predicted display brightness, N is the number of emitting pixel units, m is an integer greater than or equal to 1, Lm is a positive number, and nm is an integer.

[0033] Furthermore, the impedance compensation coefficient of each sub-screen is determined based on the target display brightness and the equivalent display brightness of each sub-screen, including:

[0034] The impedance compensation coefficient is determined based on the ratio of the target brightness to the equivalent display brightness.

[0035] Furthermore, impedance compensation is performed on the power signal transmission path of the splicing sub-screen based on the impedance compensation coefficient, including:

[0036] Adjust the impedance of the impedance adjustment device set on the power signal transmission path according to the impedance compensation coefficient;

[0037] Optionally, the impedance adjustment device includes a sliding rheostat.

[0038] According to another aspect of the present invention, a compensation device for a spliced ​​display panel is provided, the compensation device for the display panel comprising:

[0039] The current display screen acquisition module is used to acquire the current display screen of each splicing sub-screen in the splicing display panel;

[0040] The equivalent display brightness determination module is used to determine the equivalent display brightness of each splicing sub-screen when displaying the current display image based on the current display image of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen under different gray levels and different display areas.

[0041] The impedance compensation coefficient determination module is used to determine the impedance compensation coefficient of each splicing sub-screen based on the target display brightness and equivalent display brightness of each splicing sub-screen.

[0042] The impedance compensation module is used to compensate for the impedance on the power signal transmission path of the splicing sub-screen according to the impedance compensation coefficient.

[0043] Furthermore, the equivalent display brightness determination module includes:

[0044] The grayscale and number determination unit is used to determine the display grayscale of each pixel unit in the splicing sub-screen, the number of pixel units corresponding to each display grayscale, and the number of light-emitting pixel units based on the current display screen; wherein, a pixel unit includes at least one sub-pixel;

[0045] The predictive display brightness determination unit is used to determine the predicted display brightness corresponding to each display gray level in the splicing sub-screen based on the number of light-emitting pixel units in the splicing sub-screen, the display gray level of each pixel unit, and the pre-determined display brightness of each splicing sub-screen under different gray levels and different display areas.

[0046] The equivalent display brightness determination unit is used to determine the equivalent display brightness of the splicing sub-screen when displaying the current display image based on the predicted display brightness corresponding to each display grayscale and the number of pixel units corresponding to each display grayscale.

[0047] The compensation method for the splicing display panel in this embodiment of the invention obtains the current display image of each splicing sub-screen in the splicing display panel, determines the equivalent display brightness of each splicing sub-screen when displaying the current display image based on the current display image of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen under different gray levels and display areas, determines the impedance compensation coefficient of each splicing sub-screen based on the target display brightness and equivalent display brightness, and then compensates the impedance on the power signal transmission path of the splicing sub-screen based on the impedance compensation coefficient, thereby reducing the difference in power signals between different splicing sub-screens, improving the display unevenness between splicing sub-screens, and improving the display effect of the display panel.

[0048] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 This is a flowchart of a compensation method for a splicing display panel according to an embodiment of the present invention;

[0051] Figure 2 This is a flowchart of another compensation method for splicing display panels provided according to an embodiment of the present invention;

[0052] Figure 3 This is a flowchart of another compensation method for splicing display panels provided according to an embodiment of the present invention;

[0053] Figure 4This is a flowchart of another compensation method for splicing display panels provided according to an embodiment of the present invention;

[0054] Figure 5 This is a structural schematic diagram of a compensation device for splicing display panels provided in an embodiment of the present invention. Detailed Implementation

[0055] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0056] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0057] As mentioned in the background section, existing display panels are prone to uneven display between sub-screens, affecting the final display effect. The inventors discovered through research that this problem arises because the power signal from the power / signal control board is input to the sub-screens via power signal lines. Each sub-screen receives its power signal through a different power signal line. Due to impedance along the transmission path and varying loads on different sub-screens, voltage drop occurs during transmission, resulting in different power signals actually input to each sub-screen. This leads to varying brightness across different sub-screens displaying the same grayscale, hence the uneven display between sub-screens.

[0058] To address the aforementioned problems, embodiments of the present invention provide a compensation method for splicing display panels. Figure 1 This is a flowchart of a compensation method for a splicing display panel according to an embodiment of the present invention, see reference. Figure 1 The compensation methods include:

[0059] S110. Obtain the current display screen of each splicing sub-screen in the splicing display panel.

[0060] The splicing display panel may include at least two splicing sub-screens, and the currently displayed image is the image to be displayed on the splicing sub-screen. The currently displayed image can be a monochrome display image or a mixed-color display image. For example, a monochrome display image may include a red display image, a blue display image, or a green display image, etc., and a mixed-color display image may include a yellow display image, a purple display image, or a white display image, etc.

[0061] S120. Based on the current display screen of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen under different gray levels and display areas, determine the equivalent display brightness of each splicing sub-screen when displaying the current display screen.

[0062] The display area can range from 10% to 100% of the total area of ​​the sub-screens, and can be determined based on the number of luminous sub-pixels or luminous pixel units. The sub-screens can be controlled to display different grayscale levels at different display areas. The display brightness of each sub-screen at different grayscale levels and display areas can be determined by collecting the display brightness of the sub-screens using optical devices. For example, the sub-screens can be controlled to display multiple different grayscale levels of red images at multiple different display areas, obtaining the corresponding display brightness for different grayscale levels and display areas under the red image; or they can be controlled to display multiple different grayscale levels of green images at multiple different display areas, obtaining the corresponding display brightness for different grayscale levels and display areas under the green image; or they can be controlled to display multiple different grayscale levels of blue images at multiple different display areas, obtaining the corresponding display brightness for different grayscale levels and display areas under the blue image; or they can be controlled to display multiple different grayscale levels of white images at multiple different display areas, obtaining the corresponding display brightness for different grayscale levels and display areas under the white image. The pre-determined display brightness of each splicing sub-screen at different gray levels and display areas can be stored in the display panel in the form of a table or in the form of a function.

[0063] Furthermore, in this embodiment, the display brightness collected by the optical device is the brightness under the same light-emitting area.

[0064] Specifically, the grayscale of each pixel unit in the current display of each splicing sub-screen, the number of pixel units corresponding to each grayscale, and the number of luminous pixel units can be determined based on the current display of each splicing sub-screen. The equivalent display area of ​​the splicing sub-screen is determined based on the number of luminous pixel units. Then, based on the equivalent display area and the pre-determined display brightness of each splicing sub-screen at different grayscales and display areas, the predicted display brightness corresponding to each grayscale is determined at that equivalent display area. Finally, the equivalent display brightness of each splicing sub-screen when displaying the current display is calculated based on the ratio of the number of pixel units corresponding to each grayscale to the total number of luminous pixel units, and the predicted display brightness corresponding to each grayscale.

[0065] Furthermore, the pre-determined display brightness of each sub-screen at different gray levels and display areas can include the display brightness of each sub-screen when displaying one, two, or more different gray levels at each display area. Based on the equivalent display area of ​​the sub-screen, the number of pixel units corresponding to each gray level, and the pre-determined display brightness of each sub-screen when displaying one, two, or more different gray levels at each display area, the equivalent display brightness of each sub-screen when displaying the current display image is directly determined.

[0066] S130. Determine the impedance compensation coefficient of each splicing sub-screen based on the target display brightness and equivalent display brightness of each splicing sub-screen.

[0067] Specifically, the impedance compensation coefficient of the splicing sub-screen can be determined based on the ratio or difference between the target display brightness and the equivalent display brightness.

[0068] S140. Compensate the impedance on the power signal transmission path of the splicing sub-screen according to the impedance compensation coefficient.

[0069] Specifically, an impedance adjustment device can be installed on the power signal transmission path of each video wall sub-screen. The impedance of the impedance adjustment device can be adjusted according to the impedance compensation coefficient, thereby adjusting the power signal transmitted to the video wall sub-screen, reducing the difference in power signals between different video wall sub-screens, and thus reducing the display unevenness between video wall sub-screens.

[0070] The compensation method for the splicing display panel in this embodiment of the invention obtains the current display image of each splicing sub-screen in the splicing display panel, determines the equivalent display brightness of each splicing sub-screen when displaying the current display image based on the current display image of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen under different gray levels and display areas, determines the impedance compensation coefficient of each splicing sub-screen based on the target display brightness and equivalent display brightness, and then compensates the impedance on the power signal transmission path of the splicing sub-screen based on the impedance compensation coefficient, thereby reducing the difference in power signals between different splicing sub-screens, improving the display unevenness between splicing sub-screens, and improving the display effect of the display panel.

[0071] This embodiment is based on the above embodiment and optimizes it. Specifically, S120, which determines the equivalent display brightness of each splicing sub-screen when displaying the current display image based on the current display image of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen under different gray levels and different display areas, is optimized as follows: Based on the current display image, determine the display gray level of each pixel unit in the splicing sub-screen, the number of pixel units corresponding to each display gray level, and the number of light-emitting pixel units; wherein, a pixel unit includes at least one sub-pixel; based on the number of light-emitting pixel units in the splicing sub-screen, the display gray level of each pixel unit, and the pre-determined display brightness of each splicing sub-screen under different gray levels and different display areas, determine the predicted display brightness corresponding to each display gray level in the splicing sub-screen; based on the predicted display brightness corresponding to each display gray level and the number of pixel units corresponding to each display gray level, determine the equivalent display brightness of the splicing sub-screen when displaying the current display image. Figure 2 This is a flowchart of another compensation method for splicing display panels provided according to an embodiment of the present invention, see reference. Figure 2 The optimized compensation methods for splicing display panels include:

[0072] S210. Obtain the current display screen of each splicing sub-screen in the splicing display panel.

[0073] Specifically, this step has the same function as step S110, and will not be described again here.

[0074] S221. Determine the display grayscale of each pixel unit in the splicing sub-screen, the number of pixel units corresponding to each display grayscale, and the number of light-emitting pixel units based on the current display screen; wherein, a pixel unit includes at least one sub-pixel.

[0075] Wherein, at least one can be understood as one or more. For example, a pixel unit may include at least one sub-pixel among red sub-pixels, green sub-pixels, and blue sub-pixels.

[0076] Specifically, the display grayscale of each pixel unit can be determined based on the display grayscale of the sub-pixels contained within the pixel unit. For example, if each pixel unit includes red, green, and blue sub-pixels, the display grayscale of each pixel unit can be calculated based on the display grayscale of the red, green, and blue sub-pixels. The number of pixel units corresponding to each display grayscale can be calculated based on the display grayscale of each pixel unit in the splicing sub-screen, and the total number of luminous pixel units in the splicing sub-screen can also be determined.

[0077] S222. Based on the number of light-emitting pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each splicing sub-screen under different grayscale and display areas, determine the predicted display brightness corresponding to each display grayscale in the splicing sub-screen.

[0078] Specifically, the equivalent display area of ​​the splicing sub-screen can be calculated based on the number of light-emitting pixel units in the splicing sub-screen. Then, based on the pre-determined display brightness of the splicing sub-screen at different gray levels and display areas, the display brightness corresponding to the equivalent display area and display gray level of the splicing sub-screen can be found. This display brightness is then determined as the predicted display brightness corresponding to the display gray level, thereby determining the predicted display brightness corresponding to each display gray level of the splicing sub-screen.

[0079] S223. Determine the equivalent display brightness of the splicing sub-screen when displaying the current display image based on the predicted display brightness corresponding to each display grayscale and the number of pixel units corresponding to each display grayscale.

[0080] Specifically, a weighted average of the predicted display brightness corresponding to each display grayscale level can be performed to obtain the equivalent display brightness of the video wall sub-screen when displaying the current display image. Alternatively, the proportion of pixel units corresponding to each display grayscale level to the number of luminous pixel units can be calculated based on the number of pixel units corresponding to each display grayscale level and the number of luminous pixel units. This proportion can then be multiplied by the predicted display brightness corresponding to each display grayscale level, and the results summed to calculate the equivalent display brightness of the video wall sub-screen when displaying the current display image.

[0081] S230. Determine the impedance compensation coefficient of each splicing sub-screen based on the target display brightness and equivalent display brightness of each splicing sub-screen.

[0082] Specifically, this step has the same function as step S130, and will not be described again here.

[0083] S240. Compensate the impedance on the power signal transmission path of the splicing sub-screen according to the impedance compensation coefficient.

[0084] Specifically, this step has the same function as step S140, and will not be described again here.

[0085] The compensation method for the splicing display panel in this embodiment of the invention determines the display grayscale of each pixel unit in the splicing sub-screen, the number of pixel units corresponding to each display grayscale, and the number of light-emitting pixel units based on the current display screen. Based on the number of light-emitting pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each splicing sub-screen at different grayscales and display areas, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined. Based on the predicted display brightness corresponding to each display grayscale and the number of pixel units corresponding to each display grayscale, the equivalent display brightness of the splicing sub-screen when displaying the current display screen is determined. This achieves a more accurate prediction of the equivalent display brightness of the current display screen, thereby enabling a more accurate determination of the impedance compensation coefficient. This effectively compensates for the impedance on the power signal transmission path of the splicing sub-screen, reducing the difference in power signals between different splicing sub-screens, thus improving the display unevenness between splicing sub-screens and enhancing the display effect of the display panel.

[0086] Furthermore, the display brightness of each splicing sub-screen at different gray levels and display areas includes: the display brightness of each splicing sub-screen at different gray levels and display areas when displaying a monochrome display of each color.

[0087] When the current display screen is a monochrome display screen of a preset color, or when sub-pixels of the same color in the splicing sub-screen are connected to the same power signal line, or when sub-pixels of different colors in the splicing sub-screen are connected to different power signal lines, each pixel unit includes a sub-pixel of a preset color, and the display grayscale of the pixel unit is the display grayscale of the sub-pixel of the preset color.

[0088] Based on the number of luminous pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each splicing sub-screen at different grayscales and display areas, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined, including:

[0089] Based on the number of light-emitting pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each color monochrome display screen under different grayscale levels and different display areas, the predicted display brightness corresponding to each display grayscale level in the splicing sub-screen is determined.

[0090] Specifically, if the current display screen is red, the equivalent display area of ​​the splicing sub-screen can be calculated based on the number of red sub-pixels that emit light and the total number of red sub-pixels in the splicing sub-screen. Based on the equivalent display area, the display grayscale of the red sub-pixels, and the pre-determined display brightness of the splicing sub-screen at different grayscales and display areas when displaying a red display screen, the predicted display brightness of each display grayscale is determined.

[0091] If the current display screen is a blue display screen, the equivalent display area of ​​the splicing sub-screen can be calculated based on the number of blue sub-pixels that emit light and the total number of blue sub-pixels in the splicing sub-screen. Based on the equivalent display area, the display grayscale of the blue sub-pixels, and the pre-determined display brightness of the splicing sub-screen at different grayscales and display areas when displaying a blue display screen, the predicted display brightness of each display grayscale is determined.

[0092] If the current display screen is a green display screen, the equivalent display area of ​​the splicing sub-screen can be calculated based on the number of green sub-pixels that emit light in the splicing sub-screen and the total number of green sub-pixels. Based on the equivalent display area, the display grayscale of the green sub-pixels, and the pre-determined display brightness of the splicing sub-screen at different grayscales and display areas when displaying a green display screen, the predicted display brightness of each display grayscale is determined.

[0093] If the current display is a mixed-color display, and sub-pixels of the same color in the splicing sub-screen are connected to the same power signal line, while sub-pixels of different colors in the splicing sub-screen are connected to different power signal lines, then the display brightness of sub-pixels of the same color in the splicing sub-screen can be changed by compensating for the impedance on each power signal line. The method for determining the predicted display brightness of each color sub-pixel is the same as that for the current display being a monochrome display, and will not be repeated here.

[0094] Furthermore, the display brightness of each splicing sub-screen at different gray levels and display areas includes: the display brightness of each splicing sub-screen at different gray levels and display areas when displaying mixed color display images;

[0095] When sub-pixels of different colors in a splicing sub-screen are connected to the same power signal line, and the current display screen is a mixed color display screen, each pixel unit includes at least two sub-pixels with different emitting colors, and the display grayscale of the pixel unit is the equivalent display grayscale of at least two sub-pixels with different emitting colors.

[0096] Based on the number of luminous pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each splicing sub-screen at different grayscales and display areas, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined, including:

[0097] Based on the number of light-emitting pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness at different grayscale levels and different display areas when the splicing sub-screen displays a mixed color display, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined.

[0098] In this splicing sub-screen, sub-pixels of different colors are connected to the same power signal line. When compensating for the impedance on the power signal transmission path, the display grayscale of each color sub-pixel needs to be considered. "Two" can be understood as two or more. For example, each pixel unit includes a red sub-pixel and a green sub-pixel. The display grayscale of each pixel unit can be calculated based on the display grayscale of the red and green sub-pixels within that unit.

[0099] Specifically, the equivalent display area of ​​the splicing sub-screen is calculated based on the number of light-emitting pixel units and the total number of pixel units in the splicing sub-screen. Based on the equivalent display area, the display grayscale of the pixel units, and the pre-determined display brightness of the splicing sub-screen when displaying mixed color display images at different grayscale levels and different display areas, the predicted display brightness of each display grayscale level is determined.

[0100] Optionally, the display brightness of each splicing sub-screen at different gray levels and display areas includes: the display brightness of each splicing sub-screen at different gray levels and display areas when displaying a white display image.

[0101] Specifically, if the current display is white, and different colored sub-pixels in the splicing sub-screen are connected to the same power signal line, then each pixel unit includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel. The display grayscale of each pixel unit can be calculated based on the display grayscale of the red, green, and blue sub-pixels. The equivalent display area of ​​the splicing sub-screen is calculated based on the number of luminous pixel units and the total number of pixel units. Based on the equivalent display area, the display grayscale of the pixel units, and the predetermined display brightness at different grayscales and display areas when the splicing sub-screen displays a white image, the predicted display brightness for each display grayscale is determined.

[0102] Furthermore, based on the number of luminous pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each splicing sub-screen at different grayscales and display areas, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined, including:

[0103] The equivalent display area of ​​the splicing sub-screen is determined based on the total number of light-emitting pixel units in the splicing sub-screen;

[0104] The predicted display brightness for each display grayscale is determined based on the equivalent display area, the display grayscale of each pixel unit, and the pre-determined display brightness of the spliced ​​sub-screens at different grayscales and display areas.

[0105] Specifically, the equivalent display area of ​​a splicing sub-screen can be determined by the ratio of the total number of light-emitting pixel units to the total number of pixel units in the splicing sub-screen.

[0106] The display brightness is determined as the predicted display brightness corresponding to the display grayscale.

[0107] Optionally, the predicted display brightness for each display grayscale is determined based on the equivalent display area, the display grayscale of each pixel unit, and the pre-determined display brightness of the spliced ​​sub-screens at different grayscales and display areas, including:

[0108] Based on the predetermined display brightness of the splicing sub-screens under different gray levels and display areas, the equivalent brightness when all pixel units in the equivalent display area display the gray level is determined, and the equivalent brightness is determined as the predicted display brightness corresponding to the display gray level.

[0109] For example, if the equivalent display area of ​​the splicing sub-screen is 50%, and the display grayscale includes 20 and 60, then the first equivalent brightness is determined as the predicted display brightness corresponding to the display grayscale of 20 based on the first equivalent brightness of the splicing sub-screen at a display grayscale of 20 and a display area of ​​50%. Alternatively, the second equivalent brightness can be determined as the predicted display brightness corresponding to the display grayscale of 60 based on the second equivalent brightness of the splicing sub-screen at a display grayscale of 60 and a display area of ​​50%.

[0110] Optionally, based on the predetermined display brightness of the spliced ​​sub-screens at different gray levels and display areas, the equivalent brightness when all pixel units in the equivalent display area display gray levels includes:

[0111] Based on the predetermined display brightness of the spliced ​​sub-screens at different gray levels and display areas, the equivalent brightness when all pixel units in the equivalent display area display gray levels is determined by an interpolation algorithm.

[0112] Specifically, the interpolation algorithm can be linear or non-linear. If the pre-determined display brightness of the splicing sub-screens at different gray levels and display areas does not include the equivalent display area of ​​the splicing sub-screens, then the display brightness data corresponding to the equivalent display area can be determined by interpolation based on the pre-determined display brightness corresponding to the two sets of display areas adjacent to the equivalent display area. For example, if the equivalent display area is 50% and the display gray level is 20, and the pre-determined two sets of display areas adjacent to the equivalent display area, as well as the corresponding display gray levels and display brightness, are as follows: one set has a display area of ​​40%, a display gray level of 20, and a display brightness of L11; the other set has a display area of ​​60%, a display gray level of 20, and a display brightness of L22, then the predicted display brightness under the condition of an equivalent display area of ​​50% and a display gray level of 20 can be calculated by interpolation as (L11+L22) / 2.

[0113] If the predetermined display brightness of the splicing sub-screen at different gray levels and display areas includes the equivalent display area of ​​the splicing sub-screen, but does not include the display gray level of each pixel unit in the splicing sub-screen, then the predicted display brightness corresponding to the display gray level of the pixel unit can be calculated by interpolation based on the display brightness of each display gray level under the same display area as the equivalent display area. For example, if the display gray level under the equivalent display area is 20, and the predetermined display brightness of the splicing sub-screen at different gray levels and display areas includes the display area equal to the equivalent display area, the display brightness corresponding to gray level 10 is L33, and the display brightness corresponding to gray level 30 is L44, then the predicted display brightness corresponding to gray level 20 under the equivalent display area can be calculated by interpolation algorithm as (L33+L44) / 2.

[0114] Furthermore, the equivalent display brightness of the splicing sub-screen when displaying the current display image is determined based on the predicted display brightness of each pixel unit and the number of pixel units corresponding to each preset brightness, including:

[0115] The equivalent display brightness is determined using the following formula:

[0116] L equivalent = L1*(n1 / N) + L2*(n2 / N) + ... + Lm*(nm / N);

[0117] Where L1 is the first predicted display brightness, n1 is the number of pixel units corresponding to the first predicted display brightness, L2 is the second predicted display brightness, n2 is the number of pixel units corresponding to the second predicted display brightness, Lm is the m-th predicted display brightness, nm is the number of pixel units corresponding to the m-th predicted display brightness, N is the number of emitting pixel units, m is an integer greater than or equal to 1, Lm is a positive number, and nm is an integer.

[0118] Specifically, each predicted display brightness is multiplied by the ratio of the number of pixel units corresponding to that predicted display brightness to the number of luminous pixel units to determine the equivalent display brightness corresponding to each predicted display brightness pixel unit. The equivalent display brightness corresponding to each predicted display brightness pixel unit is then summed to determine the equivalent display brightness of the splicing sub-screen when displaying the current display image. This method accurately determines the equivalent display brightness of the splicing sub-screen when displaying the current display image, simplifies the calculation process of the equivalent display brightness, and improves the compensation speed.

[0119] This embodiment is based on the above embodiment and optimizes it. Specifically, S130, which determines the impedance compensation coefficient of each splicing sub-screen based on the target display brightness and the equivalent display brightness of each splicing sub-screen, is optimized to: determining the impedance compensation coefficient based on the ratio of the target brightness to the equivalent display brightness. Figure 3 This is a flowchart of another compensation method for splicing display panels provided by an embodiment of the present invention, see reference. Figure 3 The optimized compensation methods for splicing display panels include:

[0120] S310. Obtain the current display screen of each splicing sub-screen in the splicing display panel.

[0121] Specifically, this step has the same function as step S110, and will not be described again here.

[0122] S320. Based on the current display screen of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen under different gray levels and display areas, determine the equivalent display brightness of each splicing sub-screen when displaying the current display screen.

[0123] Specifically, this step has the same function as step S120, and will not be described again here.

[0124] S330. Determine the impedance compensation coefficient based on the ratio of the target brightness to the equivalent display brightness.

[0125] Specifically, since the target brightness L_target = K*I*R_target, the equivalent display brightness L_equivalent

[0126] = K*I*R_equivalent, where K is the coefficient relating display brightness to current and resistance, and K is a constant; I is the current value under the corresponding load of the video wall sub-screen; R_target is the resistance value of the video wall sub-screen at the target brightness; and R_equivalent is the resistance value of the video wall sub-screen at the current equivalent display brightness. Therefore, L_target / L_equivalent = R_target / R_equivalent, from which we can deduce R_target = (L_target / L_equivalent)*R_equivalent. Therefore, the impedance compensation coefficient can be determined by the ratio of the target brightness to the equivalent display brightness.

[0127] S340. Compensate the impedance on the power signal transmission path of the splicing sub-screen according to the impedance compensation coefficient.

[0128] Specifically, this step has the same function as step S140, and will not be described again here.

[0129] The compensation method for the splicing display panel in this embodiment of the invention obtains the current display image of each splicing sub-screen in the splicing display panel, determines the equivalent display brightness of each splicing sub-screen when displaying the current display image based on the current display image of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen under different gray levels and display areas, determines the impedance compensation coefficient based on the ratio of the target brightness to the equivalent display brightness, and then compensates the impedance on the power signal transmission path of the splicing sub-screen based on the impedance compensation coefficient, thereby reducing the difference in power signals between different splicing sub-screens, improving the display unevenness between splicing sub-screens, and improving the display effect of the display panel.

[0130] This embodiment is based on the above embodiment and optimizes it. Specifically, S140, which compensates for the impedance on the power signal transmission path of the splicing sub-screen according to the impedance compensation coefficient, is optimized to: adjusting the impedance of the impedance adjustment device set on the power signal line transmission path according to the impedance compensation coefficient. Figure 4 This is a flowchart of another compensation method for a splicing display panel according to an embodiment of the present invention, see reference. Figure 4 The optimized compensation methods for splicing display panels include:

[0131] S410: Obtain the current display screen of each splicing sub-screen in the splicing display panel.

[0132] Specifically, this step has the same function as step S110, and will not be described again here.

[0133] S420. Based on the current display screen of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen under different gray levels and display areas, determine the equivalent display brightness of each splicing sub-screen when displaying the current display screen.

[0134] Specifically, this step has the same function as step S120, and will not be described again here.

[0135] S430. Determine the impedance compensation coefficient of each splicing sub-screen based on the target display brightness and equivalent display brightness of each splicing sub-screen.

[0136] Specifically, this step has the same function as step S130, and will not be described again here.

[0137] S440. Adjust the impedance of the impedance adjustment device set on the power signal transmission path according to the impedance compensation coefficient.

[0138] Specifically, the impedance of the impedance adjustment device set on the power signal transmission path is adjusted according to the impedance compensation coefficient so that the display brightness of each splicing sub-screen is the target display brightness. For example, the impedance adjustment device includes a sliding rheostat.

[0139] The compensation method for the splicing display panel in this embodiment of the invention obtains the current display image of each splicing sub-screen in the splicing display panel, determines the equivalent display brightness of each splicing sub-screen when displaying the current display image based on the current display image of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen under different gray levels and display areas, determines the impedance compensation coefficient of each splicing sub-screen based on the target display brightness and equivalent display brightness of each splicing sub-screen, and then adjusts the impedance of the impedance adjustment device set on the power signal line transmission path according to the impedance compensation coefficient, thereby reducing the difference in power signals between different splicing sub-screens, improving the display unevenness between splicing sub-screens, and improving the display effect of the display panel.

[0140] This invention provides a compensation device for splicing display panels. Figure 5 This is a structural schematic diagram of a compensation device for a splicing display panel according to an embodiment of the present invention, with reference to... Figure 5 The compensation device 500 for the splicing display panel includes:

[0141] The current display screen acquisition module 510 is used to acquire the current display screen of each splicing sub-screen in the splicing display panel;

[0142] The equivalent display brightness determination module 520 is used to determine the equivalent display brightness of each splicing sub-screen when displaying the current display screen based on the current display screen of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen under different gray levels and different display areas.

[0143] The impedance compensation coefficient determination module 530 is used to determine the impedance compensation coefficient of each splicing sub-screen based on the target display brightness and equivalent display brightness of each splicing sub-screen.

[0144] The impedance compensation module 540 is used to compensate for the impedance on the power signal transmission path of the splicing sub-screen according to the impedance compensation coefficient.

[0145] Furthermore, the equivalent display brightness determination module 520 includes:

[0146] The grayscale and number determination unit is used to determine the display grayscale of each pixel unit in the splicing sub-screen, the number of pixel units corresponding to each display grayscale, and the number of light-emitting pixel units based on the current display screen; wherein, the pixel unit includes at least one sub-pixel;

[0147] The predictive display brightness determination unit is used to determine the predicted display brightness corresponding to each display gray level in the splicing sub-screen based on the number of light-emitting pixel units in the splicing sub-screen, the display gray level of each pixel unit, and the pre-determined display brightness of each splicing sub-screen under different gray levels and different display areas.

[0148] An equivalent display brightness determination unit is used to determine the equivalent display brightness of the splicing sub-screen when displaying the current display image based on the predicted display brightness corresponding to each display grayscale and the number of pixel units corresponding to each display grayscale.

[0149] Furthermore, the display brightness of each splicing sub-screen at different gray levels and display areas includes: the display brightness of each splicing sub-screen at different gray levels and display areas when displaying a monochrome display of each color.

[0150] When the current display screen is a monochrome display screen of a preset color, or when sub-pixels of the same color in the splicing sub-screen are connected to the same power signal line, or when sub-pixels of different colors in the splicing sub-screen are connected to different power signal lines, each pixel unit includes a sub-pixel of a preset color, and the display grayscale of the pixel unit is the display grayscale of the sub-pixel of the preset color.

[0151] The predictive display brightness determination unit is specifically used for:

[0152] Based on the number of light-emitting pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each color monochrome display screen under different grayscale levels and different display areas, the predicted display brightness corresponding to each display grayscale level in the splicing sub-screen is determined.

[0153] Furthermore, the display brightness of each splicing sub-screen at different gray levels and display areas includes: the display brightness of each splicing sub-screen at different gray levels and display areas when displaying mixed color display images;

[0154] When sub-pixels of different colors in a splicing sub-screen are connected to the same power signal line, and the current display screen is a mixed color display screen, each pixel unit includes at least two sub-pixels with different emitting colors, and the display grayscale of the pixel unit is the equivalent display grayscale of at least two sub-pixels with different emitting colors.

[0155] The predictive display brightness determination unit is specifically used for:

[0156] Based on the number of light-emitting pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness at different grayscales and display areas when the splicing sub-screen displays a mixed color display, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined.

[0157] Optionally, the display brightness of each splicing sub-screen at different gray levels and display areas includes: the display brightness of each splicing sub-screen at different gray levels and display areas when displaying a white display image.

[0158] Furthermore, the predictive display brightness determination unit also includes:

[0159] The equivalent display area determination sub-unit is used to determine the equivalent display area of ​​the splicing sub-screen based on the total number of light-emitting pixel units in the splicing sub-screen;

[0160] The predictive display brightness determination subunit is used to determine the predicted display brightness of each display gray level based on the equivalent display area, the display gray level of each pixel unit, and the display brightness of the spliced ​​sub-screen at different gray levels and display areas.

[0161] Optionally, the predictive display brightness determination subunit is also used for:

[0162] Based on the predetermined display brightness of the splicing sub-screens at different gray levels and display areas, the equivalent brightness is determined when all pixel units in the equivalent display area display the aforementioned display gray level, and the equivalent brightness is determined as the predicted display brightness corresponding to the display gray level.

[0163] Optionally, the predictive display brightness determination subunit is also used for:

[0164] Based on the predetermined display brightness of the spliced ​​sub-screens at different gray levels and display areas, the equivalent brightness when all pixel units in the equivalent display area display gray levels is determined by an interpolation algorithm.

[0165] Furthermore, the equivalent display brightness determination unit is specifically used for:

[0166] The equivalent display brightness is determined using the following formula:

[0167] L equivalent = L1*(n1 / N) + L2*(n2 / N) + ... + Lm*(nm / N);

[0168] Where L1 is the first predicted display brightness, n1 is the number of pixel units corresponding to the first predicted display brightness, L2 is the second predicted display brightness, n2 is the number of pixel units corresponding to the second predicted display brightness, Lm is the m-th predicted display brightness, nm is the number of pixel units corresponding to the m-th predicted display brightness, N is the number of emitting pixel units, m is an integer greater than or equal to 1, Lm is a positive number, and nm is an integer.

[0169] Furthermore, the impedance compensation coefficient determination module 530 is specifically used for:

[0170] The impedance compensation coefficient is determined based on the ratio of the target brightness to the equivalent display brightness.

[0171] Furthermore, the impedance compensation module 540 is specifically used for:

[0172] Adjust the impedance of the impedance adjustment device set on the power signal transmission path according to the impedance compensation coefficient;

[0173] Optionally, the impedance adjustment device includes a sliding rheostat.

[0174] The compensation device for the splicing display panel provided in the embodiments of the present invention can execute the compensation method for the splicing display panel provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the method.

[0175] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and no limitation is imposed herein.

[0176] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A compensation method for splicing display panels, characterized in that, include: Get the current display screen of each sub-screen in the splicing display panel; Based on the current display screen of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen under different gray levels and different display areas, determine the equivalent display brightness of each splicing sub-screen when displaying the current display screen; The impedance compensation coefficient of each of the splicing sub-screens is determined based on the target display brightness and the equivalent display brightness of each of the splicing sub-screens; The impedance of the power signal transmission path of the splicing sub-screen is compensated according to the impedance compensation coefficient.

2. The compensation method for splicing display panels according to claim 1, characterized in that: Based on the current display image of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen at different gray levels and display areas, the equivalent display brightness of each splicing sub-screen when displaying the current display image is determined, including: The display grayscale of each pixel unit in the splicing sub-screen, the number of pixel units corresponding to each display grayscale, and the number of light-emitting pixel units are determined based on the current display screen; wherein, the pixel unit includes at least one sub-pixel; Based on the number of light-emitting pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each splicing sub-screen under different grayscale and display areas, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined. The equivalent display brightness of the splicing sub-screen when displaying the current display image is determined based on the predicted display brightness corresponding to each display grayscale and the number of pixel units corresponding to each display grayscale.

3. The compensation method for splicing display panels according to claim 2, characterized in that: The display brightness of each splicing sub-screen at different gray levels and display areas includes: the display brightness of each splicing sub-screen at different gray levels and display areas when displaying a monochrome display of each color; When the current display screen is a monochrome display screen of a preset color, or when sub-pixels of the same color in the splicing sub-screen are connected to the same power signal line, or when sub-pixels of different colors in the splicing sub-screen are connected to different power signal lines, each pixel unit includes a sub-pixel of a preset color, and the display grayscale of the pixel unit is the display grayscale of the sub-pixel of the preset color. Based on the number of luminous pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each splicing sub-screen at different grayscales and display areas, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined, including: Based on the number of light-emitting pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness at different grayscales and display areas when the splicing sub-screen displays a monochrome display of each color, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined.

4. The compensation method for splicing display panels according to claim 2, characterized in that: The display brightness of each splicing sub-screen at different gray levels and display areas includes: the display brightness of each splicing sub-screen at different gray levels and display areas when displaying mixed color images; In the splicing sub-screen, sub-pixels of different colors are connected to the same power signal line, and when the current display screen is a mixed color display screen, each pixel unit includes at least two sub-pixels of different emitting colors, and the display grayscale of the pixel unit is the equivalent display grayscale of the at least two sub-pixels of different emitting colors. Based on the number of luminous pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each splicing sub-screen at different grayscales and display areas, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined, including: Based on the number of light-emitting pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness at different grayscales and different display areas when the splicing sub-screen displays a mixed color display, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined. Preferably, the display brightness of each splicing sub-screen under different gray levels and different display areas includes: the display brightness of each splicing sub-screen under different gray levels and different display areas when displaying a white display image.

5. The compensation method for splicing display panels according to claim 2, characterized in that, Based on the number of luminous pixel units in the splicing sub-screen, the display grayscale of each pixel unit, and the pre-determined display brightness of each splicing sub-screen at different grayscales and display areas, the predicted display brightness corresponding to each display grayscale in the splicing sub-screen is determined, including: The equivalent display area of ​​the splicing sub-screen is determined based on the total number of light-emitting pixel units in the splicing sub-screen; The predicted display brightness of each display gray level is determined based on the equivalent display area, the display gray level of each pixel unit, and the pre-determined display brightness of the spliced ​​sub-screen under different gray levels and display areas. Preferably, determining the predicted display brightness for each display grayscale based on the equivalent display area, the display grayscale of each pixel unit, and the pre-determined display brightness of the spliced ​​sub-screen at different grayscales and display areas includes: Based on the predetermined display brightness of the splicing sub-screen under different gray levels and display areas, the equivalent brightness when all pixel units in the equivalent display area display the display gray level is determined, and the equivalent brightness is determined as the predicted display brightness corresponding to the display gray level; Preferably, determining the equivalent brightness when all pixel units in the equivalent display area display the grayscale, based on the pre-determined display brightness of the spliced ​​sub-screens at different grayscale levels and display areas, includes: Based on the predetermined display brightness of the spliced ​​sub-screen at different gray levels and display areas, the equivalent brightness when all pixel units in the equivalent display area display the display gray level is determined by an interpolation algorithm.

6. The compensation method for splicing display panels according to claim 2, characterized in that, The equivalent display brightness of the splicing sub-screen when displaying the current display image is determined based on the predicted display brightness of each pixel unit and the number of pixel units corresponding to each preset brightness, including: The equivalent display brightness is determined according to the following formula: L equivalent = L1*(n1 / N) + L2*(n2 / N) + ... + Lm*(nm / N); Where L1 is the first predicted display brightness, n1 is the number of pixel units corresponding to the first predicted display brightness, L2 is the second predicted display brightness, n2 is the number of pixel units corresponding to the second predicted display brightness, Lm is the m-th predicted display brightness, nm is the number of pixel units corresponding to the m-th predicted display brightness, N is the number of emitting pixel units, m is an integer greater than or equal to 1, Lm is a positive number, and nm is an integer.

7. The compensation method for splicing display panels according to claim 1, characterized in that, The impedance compensation coefficient of each sub-screen is determined based on the target display brightness and the equivalent display brightness of each sub-screen, including: The impedance compensation coefficient is determined based on the ratio of the target brightness to the equivalent display brightness.

8. The compensation method for splicing display panels according to claim 1, characterized in that, The impedance of the power signal transmission path of the splicing sub-screen is compensated according to the impedance compensation coefficient, including: Adjust the impedance of the impedance adjustment device installed on the power signal transmission path according to the impedance compensation coefficient; Preferably, the impedance adjustment device includes a sliding rheostat.

9. A compensation device for splicing display panels, characterized in that, include: The current display screen acquisition module is used to acquire the current display screen of each splicing sub-screen in the splicing display panel; The equivalent display brightness determination module is used to determine the equivalent display brightness of each splicing sub-screen when displaying the current display screen based on the current display screen of each splicing sub-screen and the pre-determined display brightness of each splicing sub-screen under different gray levels and different display areas. An impedance compensation coefficient determination module is used to determine the impedance compensation coefficient of each of the splicing sub-screens based on the target display brightness and the equivalent display brightness of each of the splicing sub-screens. An impedance compensation module is used to compensate for the impedance on the power signal transmission path of the splicing sub-screen according to the impedance compensation coefficient.

10. The compensation device according to claim 9, characterized in that, The equivalent display brightness determination module includes: The grayscale and number determination unit is used to determine the display grayscale of each pixel unit in the splicing sub-screen, the number of pixel units corresponding to each display grayscale, and the number of light-emitting pixel units based on the current display screen; wherein, the pixel unit includes at least one sub-pixel; The predictive display brightness determination unit is used to determine the predicted display brightness corresponding to each display gray level in the splicing sub-screen based on the number of light-emitting pixel units in the splicing sub-screen, the display gray level of each pixel unit, and the pre-determined display brightness of each splicing sub-screen under different gray levels and different display areas. An equivalent display brightness determination unit is used to determine the equivalent display brightness of the splicing sub-screen when displaying the current display image based on the predicted display brightness corresponding to each display grayscale and the number of pixel units corresponding to each display grayscale.

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