Generation method of target gray scale value of spliced screen and device and display apparatus thereof

Abstract

The application provides a target gray scale value generation method and device of a spliced screen and a display device. The method comprises the following steps: acquiring a plurality of first monochrome optical information corresponding to a plurality of monochrome pictures of a first display panel; adjusting a plurality of second monochrome optical information corresponding to the plurality of monochrome pictures of a second display panel according to the plurality of first monochrome optical information, so as to determine a plurality of corresponding monochrome compensation coefficients; further acquiring an initial gray scale value of the second display panel; and determining a corresponding target gray scale value according to the plurality of monochrome compensation coefficients and the initial gray scale value, so as to improve the uniformity of picture display of the spliced screen.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to the manufacture of display devices, specifically to a method and equipment for generating target grayscale values ​​for splicing screens, and a display device. Background Technology

[0002] Video wall displays, which combine identical or different types of screens to create a larger display, offer advantages such as high resolution, wide viewing angle, and good scalability.

[0003] Currently, the most common type of video wall is a splicing screen made up of LCD (Liquid Crystal Display) and LED (Light Emitting Diode) panels. However, due to the differences in color gamut and brightness between LCD and LED panels, subjective visual perception is affected. That is, the human eye can clearly perceive the difference in brightness between LCD and LED panels, resulting in poor uniformity of the image displayed on the video wall.

[0004] Therefore, the uniformity of the image display on existing video walls is poor and urgently needs improvement. Summary of the Invention

[0005] The purpose of this invention is to provide a method and equipment for generating target grayscale values ​​for video wall displays, as well as a display device, to improve the technical problem of poor uniformity in the display of existing video wall displays.

[0006] This invention provides a method for generating target grayscale values ​​for a video wall, including:

[0007] Acquire multiple first monochrome optical information corresponding to multiple monochrome images of the first display panel;

[0008] Based on multiple first monochrome optical information, the second display panel is adjusted to correspond to multiple second monochrome optical information of multiple monochrome images to determine multiple monochrome compensation coefficients, wherein the type of the first display panel is different from the type of the second display panel;

[0009] Obtain the initial grayscale value of the second display panel, and determine the corresponding target grayscale value based on the multiple monochrome compensation coefficients and the initial grayscale value.

[0010] In one embodiment, the first display panel and the second display panel include a first sub-pixel, a second sub-pixel, and a third sub-pixel of different colors;

[0011] The plurality of monochrome images include a plurality of first monochrome images corresponding to a plurality of first grayscale binding points of the first sub-pixel, a plurality of second monochrome images corresponding to a plurality of second grayscale binding points of the second sub-pixel, and a plurality of third monochrome images corresponding to a plurality of third grayscale binding points of the third sub-pixel.

[0012] The plurality of first monochrome optical information includes a plurality of first sub-optical information corresponding to a plurality of first monochrome images, a plurality of second sub-optical information corresponding to a plurality of second monochrome images, and a plurality of third sub-optical information corresponding to a plurality of third monochrome images.

[0013] In one embodiment, the step of adjusting the second monochromatic optical information of the second display panel corresponding to the multiple monochromatic images based on the multiple first monochromatic optical information to determine the corresponding multiple monochromatic compensation coefficients includes:

[0014] Acquire reference monochromatic optical information corresponding to multiple reference grayscale binding points of the first monochromatic optical information;

[0015] Acquire multiple non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points of the first monochromatic optical information;

[0016] Based on the reference monochromatic optical information and the multiple non-reference monochromatic optical information, a plurality of monochromatic compensation coefficients are determined.

[0017] In one embodiment, the plurality of first grayscale binding points, the plurality of second grayscale binding points, and the plurality of third grayscale binding points all include the reference grayscale binding point;

[0018] The step of obtaining reference monochromatic optical information corresponding to reference grayscale binding points for multiple first monochromatic optical information includes:

[0019] First reference monochromatic optical information corresponding to the reference grayscale binding point is obtained from multiple first sub-optical information; second reference monochromatic optical information corresponding to the reference grayscale binding point is obtained from multiple second sub-optical information; and third reference monochromatic optical information corresponding to the reference grayscale binding point is obtained from multiple third sub-optical information.

[0020] In one embodiment, the plurality of first grayscale binding points, the plurality of second grayscale binding points, and the plurality of third grayscale binding points all include the plurality of non-reference grayscale binding points;

[0021] The step of acquiring multiple non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points of the first monochromatic optical information includes:

[0022] Multiple first non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points are obtained from multiple first sub-optical information; multiple second non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points are obtained from multiple second sub-optical information; and multiple third non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points are obtained from multiple third sub-optical information.

[0023] In one embodiment, the step of determining a plurality of monochromatic compensation coefficients based on the reference monochromatic optical information and a plurality of non-reference monochromatic optical information includes:

[0024] Based on the reference monochromatic optical information and the monochromatic optical information to be calibrated on the second display panel corresponding to the reference grayscale binding point, determine the reference monochromatic compensation coefficient corresponding to the reference grayscale binding point.

[0025] Based on the non-reference monochromatic optical information and the reference monochromatic optical information, at least one grayscale compensation coefficient corresponding to the non-reference grayscale binding point is determined, and at least one corresponding non-reference monochromatic compensation coefficient is determined based on the at least one grayscale compensation coefficient and the reference monochromatic compensation coefficient. The reference monochromatic compensation coefficient and the plurality of non-reference monochromatic compensation coefficients constitute a plurality of monochromatic compensation coefficients.

[0026] In one embodiment, the step of obtaining the initial grayscale value of the second display panel and determining the corresponding target grayscale value based on the plurality of monochrome compensation coefficients and the initial grayscale value includes:

[0027] Based on the multiple monochrome compensation coefficients and the initial grayscale value, determine the grayscale value to be verified corresponding to the second display panel;

[0028] Obtain the first color mixing optical information corresponding to the color mixing image of the first display panel under the initial grayscale value;

[0029] Based on the first color mixing optical information, the grayscale value to be verified is adjusted to adjust the second color mixing optical information of the second display panel corresponding to the color mixing image, so as to determine the target grayscale value.

[0030] The present invention provides a display device comprising a first display panel and a second display panel as described above, which are spliced ​​together, for driving the second display panel to emit light according to a target grayscale value as described above.

[0031] In one embodiment, the display device includes:

[0032] A controller, which executes program instructions to implement the method for generating target grayscale values ​​for the splicing screen as described above.

[0033] This invention provides a target grayscale value generation device for executing program instructions to implement the target grayscale value generation method of the splicing screen as described above.

[0034] This invention provides a method and apparatus for generating target grayscale values ​​for a video wall display, and a display device thereof. The method includes acquiring multiple first monochrome optical information corresponding to multiple monochrome images on a first display panel, and adjusting multiple second monochrome optical information corresponding to the multiple monochrome images on a second display panel based on the multiple first monochrome optical information to determine multiple monochrome compensation coefficients. Further, it acquires the initial grayscale value of the second display panel, and determines the corresponding target grayscale value based on the multiple monochrome compensation coefficients and the initial grayscale value. In other words, by using the first monochrome optical information of the first display panel as a reference, it adjusts the parameters in the second display panel to obtain second monochrome optical information that matches the first monochrome optical information, thereby determining the monochrome compensation coefficients. This achieves optical compensation for the second display panel, thereby improving the uniformity of the video wall display. Attached Figure Description

[0035] The present invention will be further described below with reference to the accompanying drawings. It should be noted that the accompanying drawings described below are merely for illustrating some embodiments of the present invention. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0036] Figures 1 to 5 The following are five flowcharts illustrating the method for generating target grayscale values ​​for a splicing screen according to embodiments of the present invention. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. Furthermore, it should be noted that the accompanying drawings only provide structures closely related to the invention, omitting some details less relevant to the invention. The purpose is to simplify the drawings and make the inventive points clear at a glance, not to indicate that the actual device is identical to the accompanying drawings. Figure 1 It is identical to the actual device and is not set as a limitation.

[0039] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase at various points in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0040] This invention provides a method for generating target grayscale values ​​for splicing screens, and the method may include, but is not limited to, the following embodiments and combinations thereof.

[0041] Among them, such as Figure 1 As shown, the method for generating the target grayscale value of the splicing screen may include, but is not limited to, the following steps and combinations thereof.

[0042] S1, acquire multiple first monochrome optical information corresponding to the first display panel under multiple monochrome images.

[0043] The application scenarios for the target grayscale values ​​generated by this method can include, but are not limited to, video wall displays. Video wall displays can include different types of first and second display panels. Due to the differences in color gamut and brightness between the first and second display panels, subjective visual perception will be affected. That is, the human eye will clearly perceive the difference in brightness between the first and second display panels, resulting in poor uniformity of the video wall display.

[0044] For ease of description, it can be assumed that the first display panel has a smaller color gamut compared to the second display panel, making it difficult to adjust the brightness and color saturation of the first display panel to match that of the second display panel. Therefore, the brightness and color saturation of the first display panel can be used as a benchmark to adjust the display parameters of the second display panel to make its brightness and color saturation match that of the first display panel. The first display panel can be, but is not limited to, an LCD, and the second display panel can be, but is not limited to, an LED panel.

[0045] Specifically, in this embodiment, both the first display panel and the second display panel can include multiple pixel units. Each pixel unit can include at least two sub-pixels of different colors. For ease of description, this is illustrated by an example where the pixel unit includes a first sub-pixel, a second sub-pixel, and a third sub-pixel of different colors, which can be red, green, and blue, respectively. Therefore, the aforementioned multiple monochrome images can include multiple first monochrome images corresponding to the color of the first sub-pixel (i.e., the grayscale values ​​of both the second and third sub-pixels are 0, and the grayscale values ​​of the corresponding multiple first sub-pixels are equal to different grayscale binding points), multiple second monochrome images corresponding to the color of the second sub-pixel (i.e., the grayscale values ​​of both the first and third sub-pixels are 0, and the grayscale values ​​of the corresponding multiple second sub-pixels are equal to different grayscale binding points), and multiple third monochrome images corresponding to the color of the third sub-pixel (i.e., the grayscale values ​​of both the first and second sub-pixels are 0, and the grayscale values ​​of the corresponding multiple third sub-pixels are equal to different grayscale binding points).

[0046] Accordingly, in the first display panel, each monochrome image can have corresponding first monochrome optical information, as shown in Table 1. R, G, and B represent the grayscale values ​​of the first sub-pixel, the second sub-pixel, and the third sub-pixel, respectively. Only some grayscale values ​​of each sub-pixel are listed as corresponding grayscale binding points. For example, R equal to 255, 0, 128, 15, etc. can be used as grayscale binding points of the first sub-pixel; G equal to 255, 0, 110, 189, etc. can be used as grayscale binding points of the second sub-pixel; and B equal to 255, 0, 12, 111, etc. can be used as grayscale binding points of the third sub-pixel. The image corresponding to the gray level binding point of the first sub-pixel, the gray level binding point of the second sub-pixel, and the gray level binding point of the third sub-pixel (if the gray level binding points of two of them are both equal to 0, the image is a monochrome image; if the gray level binding points of at least two of them are greater than 0, the image is a mixed color image). Each image (monochrome image or mixed color image) has a corresponding first optical information spec. Specifically, monochrome images (such as the first three images in Table 1) have corresponding first monochrome optical information, and mixed color images (such as the fourth and fifth images in Table 1) have corresponding first mixed color optical information.

[0047] Table 1

[0048]

[0049] Furthermore, the plurality of monochrome images include a plurality of first monochrome images (R≠0, G=B=0) corresponding to a plurality of first grayscale binding points (i.e., the values ​​of R in Table 1) of the first sub-pixel, a plurality of second monochrome images (G≠0, R=B=0) corresponding to a plurality of second grayscale binding points (i.e., the values ​​of G in Table 1) of the second sub-pixel, and a plurality of third monochrome images (B≠0, G=R=0) corresponding to a plurality of third grayscale binding points (i.e., the values ​​of B in Table 1) of the third sub-pixel; correspondingly, the plurality of first monochrome optical information includes a plurality of first sub-optical information corresponding to a plurality of first monochrome images (i.e., a plurality of pure red images with different grayscale values ​​(a plurality of first grayscale binding points)), a plurality of second sub-optical information corresponding to a plurality of second monochrome images (i.e., a plurality of pure green images with different grayscale values ​​(a plurality of second grayscale binding points)), and a plurality of third sub-optical information corresponding to a plurality of third monochrome images (i.e., a plurality of pure blue images with different grayscale values ​​(a plurality of third grayscale binding points)). Among them, multiple first gray level binding points, multiple second gray level binding points, and multiple third gray level binding points can be the same or different.

[0050] It should be noted that the above images can be understood as the first sub-pixel in each pixel unit having the same grayscale value, the second sub-pixel in each pixel unit having the same grayscale value, and the third sub-pixel in each pixel unit having the same grayscale value. These multiple images can be based on the same area of ​​the first display panel under multiple corresponding R, G, B values, or they can be the images presented by the entire first display panel under multiple corresponding R, G, B values.

[0051] Specifically, the first optical information may include the sum of stimulus values ​​X of all first sub-pixels in the corresponding image, the sum of stimulus values ​​Y of all second sub-pixels (equal to the image brightness Lv), and the sum of stimulus values ​​Z of all third sub-pixels, where x equals X / (X+Y+Z) and y equals Y / (X+Y+Z). This first optical information can be obtained using, but is not limited to, an area array imaging colorimeter. Furthermore, the tristimulus values ​​and corresponding x, y, and Lv of each color sub-pixel in this region of the first display panel can also be obtained.

[0052] S2, based on multiple first monochrome optical information, adjust multiple second monochrome optical information of the second display panel corresponding to multiple monochrome images to determine multiple monochrome compensation coefficients, wherein the type of the first display panel is different from the type of the second display panel.

[0053] As discussed above, each first monochrome optical information in the first display panel corresponds to a monochrome image, which has corresponding R, G, and B values. This step can be understood as adjusting at least one of the three values ​​in the second display panel based on the R, G, and B values, thereby causing the corresponding second monochrome optical information in the second display panel to change, until the difference between the second monochrome optical information and the first monochrome optical information is small or even equal. The R, G, and B values ​​of the second display panel at this time are then divided by the corresponding R, G, and B values ​​in the first display panel to obtain the corresponding monochrome compensation coefficients.

[0054] Specifically, such as Figure 2 As shown, step S2 may include, but is not limited to, the following steps and combinations thereof.

[0055] S201, acquire reference monochromatic optical information corresponding to the reference grayscale binding points of the first monochromatic optical information.

[0056] As discussed above, multiple first monochromatic optical information includes multiple first sub-optical information corresponding to multiple first monochromatic images (i.e., corresponding to multiple first grayscale binding points). The first sub-optical information of the first monochromatic image when the first grayscale binding point is equal to the first reference grayscale binding point can be called the first reference monochromatic optical information. Similarly, multiple second monochromatic optical information includes multiple second sub-optical information corresponding to multiple second monochromatic images (i.e., corresponding to multiple second grayscale binding points). The second sub-optical information of the second monochromatic image when the second grayscale binding point is equal to the second reference grayscale binding point can be called the second reference monochromatic optical information. Similarly, multiple third monochromatic optical information includes multiple third sub-optical information corresponding to multiple third monochromatic images (i.e., corresponding to multiple third grayscale binding points). The third sub-optical information of the third monochromatic image when the third grayscale binding point is equal to the third reference grayscale binding point can be called the third reference monochromatic optical information.

[0057] Based on the above discussion, such as Figure 3 As shown, step S201 may include, but is not limited to, the following steps and combinations thereof.

[0058] S2011, obtain (the above) first reference monochromatic optical information corresponding to the (first) reference grayscale binding point from a plurality of first sub-optical information, obtain (the above) second reference monochromatic optical information corresponding to the (second) reference grayscale binding point from a plurality of second sub-optical information, and obtain (the above) third reference monochromatic optical information corresponding to the (third) reference grayscale binding point from a plurality of third sub-optical information.

[0059] In this process, the first reference grayscale binding point, the second reference grayscale binding point, and the third reference grayscale binding point can be collectively referred to as the reference grayscale binding point in step S201. Of course, all three can be equal (that is, multiple first grayscale binding points, multiple second grayscale binding points, and multiple third grayscale binding points all include the reference grayscale binding point), for example, they can all be equal to the maximum grayscale value, which can be 255. Similarly, the first reference monochromatic optical information, the second reference monochromatic optical information, and the third reference monochromatic optical information can be collectively referred to as the reference monochromatic optical information in step S201.

[0060] S202, acquire multiple non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points of the first monochromatic optical information.

[0061] Unlike the reference grayscale binding point, the first sub-optical information of multiple first monochrome images when the first grayscale binding point is equal to multiple first non-reference grayscale binding points can be called the first non-reference monochrome optical information; similarly, the second sub-optical information of multiple second monochrome images when the second grayscale binding point is equal to multiple second non-reference grayscale binding points can be called the second non-reference monochrome optical information; similarly, the third sub-optical information of multiple third monochrome images when the third grayscale binding point is equal to multiple third non-reference grayscale binding points can be called the third non-reference monochrome optical information.

[0062] Based on the above discussion, such as Figure 3 As shown, step S202 may include, but is not limited to, the following steps and combinations thereof.

[0063] S2021, obtain multiple first non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points from multiple first sub-optical information, obtain multiple second non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points from multiple second sub-optical information, and obtain multiple third non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points from multiple third sub-optical information.

[0064] In this context, multiple first non-reference grayscale binding points, multiple second non-reference grayscale binding points, and multiple third non-reference grayscale binding points can be collectively referred to as multiple non-reference grayscale binding points in step S202. Of course, all three can be equal (that is, multiple first grayscale binding points, multiple second grayscale binding points, and multiple third grayscale binding points all include multiple non-reference grayscale binding points). Similarly, multiple first non-reference monochromatic optical information, multiple second non-reference monochromatic optical information, and multiple third non-reference monochromatic optical information can be collectively referred to as multiple non-reference monochromatic optical information in step S202.

[0065] S203, determine a plurality of monochromatic compensation coefficients based on the reference monochromatic optical information and a plurality of non-reference monochromatic optical information.

[0066] Specifically, each color sub-pixel can have multiple corresponding monochrome compensation coefficients, and each of the multiple monochrome compensation coefficients of each color sub-pixel can be determined at least based on the first reference monochrome optical information, the second reference monochrome optical information, and the third reference monochrome optical information.

[0067] Furthermore, the multiple monochrome compensation coefficients corresponding to the first sub-pixel can also be determined based on the multiple first non-reference monochrome optical information of the multiple first monochrome images of the multiple first non-reference grayscale binding points. The multiple monochrome compensation coefficients corresponding to the second sub-pixel can also be determined based on the multiple second non-reference monochrome optical information of the multiple second monochrome images of the multiple second non-reference grayscale binding points. The multiple monochrome compensation coefficients corresponding to the third sub-pixel can also be determined based on the multiple third non-reference monochrome optical information of the multiple third monochrome images of the multiple third non-reference grayscale binding points.

[0068] Among them, such as Figure 4 As shown, step S203 may include, but is not limited to, the following steps and combinations thereof.

[0069] S2031, based on the reference monochromatic optical information and the monochromatic optical information to be calibrated of the second display panel corresponding to the reference grayscale binding point, determine the reference monochromatic compensation coefficient corresponding to the reference grayscale binding point.

[0070] For ease of description, this example only uses the case where the first reference grayscale binding point, the second reference grayscale binding point, and the third reference grayscale binding point are all equal to the same reference grayscale binding point (255). In this case, the reference monochromatic optical information includes the first reference monochromatic optical information R of the first monochromatic image under the reference grayscale binding point. LCD255 The second reference monochrome optical information G of the second monochrome image under the reference grayscale binding point. LCD255 The third reference monochrome optical information B of the third monochrome image under the reference grayscale binding point. LCD255 .

[0071] Correspondingly, the monochromatic optical information to be calibrated of the second display panel corresponding to the reference grayscale binding point may also include the first monochromatic optical information R of the first sub-pixel at the reference grayscale binding point (255). LED255 The second sub-pixel under the reference grayscale binding point (255) contains the second monochromatic optical information G to be calibrated. LED255 The third sub-pixel's third monochromatic optical information B to be calibrated at the reference grayscale binding point (255) LED255 .

[0072] Understandably, due to the difference between the monochrome optical information to be calibrated on the second display panel and the reference monochrome optical information on the first display panel, a corresponding reference monochrome compensation coefficient is needed to process the monochrome optical information to be calibrated in order to maintain consistency with the reference monochrome optical information. Of course, the reference monochrome compensation coefficient can also include the reference monochrome compensation coefficient K corresponding to the three sub-pixels in the first monochrome image under the reference grayscale binding point. rr K rg K rb In the second monochrome image under the reference grayscale binding point, the reference monochrome compensation coefficients K corresponding to the three sub-pixels are respectively gr K gg K gb In the third monochrome image under the reference grayscale binding point, the reference monochrome compensation coefficients K corresponding to the three sub-pixels are respectively br K bg K bb .

[0073] For ease of understanding, the reference monochromatic compensation coefficient can be determined using the following three formulas:

[0074] R LCD255 =K rr *R LED255 +K rg *G LED255 +K rb *B LED255 ;

[0075] G LCD255 =K gr *R LED255 +K gg *G LED255 +K gb *B LED255 ;

[0076] B LCD255 =K br *R LED255 +K bg *G LED255 +K bb *B LED255 ;

[0077] In this case, the reference monochrome optical information of the middle area or the entire area of ​​the first display panel can be used as a reference to adjust different areas of the second display panel according to the same standard; of course, the area in the first display panel corresponding to each area in Table 2 can also be used as a reference to adjust different areas of the second display panel according to their own standards.

[0078] Table 2

[0079]

[0080] Specifically, one can first use, but is not limited to, the camera to capture the corresponding area on the second panel in R. LED255 G LED255 B LED255 The monochromatic optical information to be calibrated is shown in Table 2. Due to the difference in distance between different regions (positions) and the driving chip, as shown in Table 2, different positions (e.g., at least positions 1 to 5) have different distances in R. LED255 G LED255 B LED255 The monochromatic optical information to be calibrated is different from that of the first sub-pixel in the region. The monochromatic optical information to be calibrated may include the brightness R-Lv of the first sub-pixel in the region, the corresponding first component Rx and the corresponding second component Ry, the brightness G-Lv of the second sub-pixel in the region, the corresponding first component Gx and the corresponding second component Gy, and the brightness B-Lv of the third sub-pixel in the region, the corresponding first component Bx and the corresponding second component By.

[0081] Specifically, each reference monochromatic compensation coefficient here reflects the adjustment of both brightness and chromaticity of the corresponding monochromatic optical information to be calibrated. That is:

[0082] On the one hand, the sum of the brightness R-Lv of the first sub-pixel, the brightness G-Lv of the second sub-pixel, and the brightness B-Lv of the third sub-pixel in the corresponding area of ​​the second display panel in Table 2 must be equal to the sum of the three brightness values ​​corresponding to the corresponding area of ​​the first display panel in the first three frames in Table 1.

[0083] On the other hand, the Rx and Ry values ​​of the corresponding areas of the second display panel in Table 2 must be equal to the sum of the x values ​​of the first sub-pixels (not shown in Table 1) and the sum of the y values ​​of the first sub-pixels (not shown in Table 1) of the corresponding areas of the first display panel in the first three frames of Table 1. The Gx and Gy values ​​of the corresponding areas of the second display panel in Table 2 must be equal to the sum of the x values ​​of the second sub-pixels (not shown in Table 1) and the sum of the y values ​​of the second sub-pixels (not shown in Table 1) of the corresponding areas of the second display panel in the first three frames of Table 1. The Bx and By values ​​of the corresponding areas of the second display panel in Table 2 must be equal to the sum of the x values ​​of the third sub-pixels (not shown in Table 1) and the sum of the y values ​​of the third sub-pixels (not shown in Table 1) of the corresponding areas of the first display panel in the first three frames of Table 1.

[0084] S2032, based on the non-reference monochromatic optical information and the reference monochromatic optical information, determine at least one grayscale compensation coefficient corresponding to the non-reference grayscale binding point, and determine at least one corresponding non-reference monochromatic compensation coefficient based on the at least one grayscale compensation coefficient and the reference monochromatic compensation coefficient, wherein the reference monochromatic compensation coefficient and the plurality of non-reference monochromatic compensation coefficients constitute a plurality of monochromatic compensation coefficients.

[0085] Following the example of step S20321, the first non-reference grayscale binding point, the second non-reference grayscale binding point, and the third non-reference grayscale binding point can be selected as other grayscale binding points different from the reference grayscale binding point (255). Then, each non-reference monochromatic optical information can include the first non-reference monochromatic optical information R of the first monochromatic image under the corresponding non-reference grayscale binding point (e.g., equal to 128). LCD128 The second non-reference monochrome optical information G of the second monochrome image LCD128 The third non-reference monochrome optical information B of the third monochrome image LCD128 .

[0086] Understandably, it can be assumed that the chromaticity difference of monochrome images corresponding to the same color sub-pixel is small, with only a difference in brightness. For example, a grayscale compensation coefficient K can be multiplied before the reference monochrome compensation coefficient of the monochrome optical information to be calibrated. gray To obtain the corresponding non-reference monochrome compensation coefficient, a second monochrome image with a non-reference grayscale binding point equal to 128 (second non-reference monochrome optical information G) is generated. LCD128 For example, the corresponding grayscale compensation coefficient K is... gray It can be determined using the following formula:

[0087] G LCD128 =K gray *(K gr *R LED255 +K gg *G LED255 +K gb *B LED255 );

[0088] That is, it can be considered that G is here. LCD255 Based on the brightness of the image, it is simultaneously multiplied by a grayscale compensation coefficient K. gray The brightness that is presented afterward is equal to the G of the first display panel. LCD128 The brightness of the light in the first sub-pixel; similarly, the monochrome compensation coefficient corresponding to the reference grayscale binding point in the first sub-pixel can include the aforementioned K. rr K rg K rb The monochrome compensation coefficient corresponding to each non-reference grayscale binding point in the first sub-pixel can include the aforementioned K. rr K rg K rb and the corresponding K gray The monochrome compensation coefficients corresponding to the reference gray level binding point in the first sub-pixel and the monochrome compensation coefficients corresponding to each non-reference gray level binding point can be explained in the same way. The monochrome compensation coefficients corresponding to the reference gray level binding point in the third sub-pixel and the monochrome compensation coefficients corresponding to each non-reference gray level binding point can also be explained in the same way.

[0089] Of course, if we consider the chromaticity difference of monochrome images corresponding to the same color sub-pixel, then we can assume that in B... LCD255 Based on the brightness in K br K bg K bb They need to be multiplied by the corresponding grayscale compensation coefficient K simultaneously. gray1 K gray2 K gray3 The brightness that is presented afterward is equal to the G of the first display panel. LCD128 The brightness in the image, that is, the monochrome compensation coefficient corresponding to each non-reference grayscale binding point in the third sub-pixel, can include the aforementioned K. br K bg K bb and the corresponding K gray1 K gray2 K gray3 .

[0090] In summary, through steps S20321 to S20322, multiple sets of monochrome compensation coefficients corresponding to multiple (first) grayscale binding points for the first sub-pixel can be obtained, except for the reference grayscale binding point corresponding to K. rr K rg K rb These three monochrome compensation coefficients, and for each of the other non-reference grayscale binding points, there is a corresponding K. rr K rg K rb These three monochrome compensation coefficients, plus at least one grayscale compensation coefficient K gray Similarly, we can also obtain multiple sets of monochrome compensation coefficients for the second sub-pixel corresponding to multiple (second) grayscale binding points, except for the base grayscale binding point corresponding to K. gr K gg K gb These three monochrome compensation coefficients, and for each of the other non-reference grayscale binding points, there is a corresponding K. gr K gg K gb These three monochrome compensation coefficients, plus at least one grayscale compensation coefficient K gray Similarly, we can also obtain multiple sets of monochrome compensation coefficients for the third sub-pixel corresponding to multiple (third) grayscale binding points, except for the reference grayscale binding point which corresponds to K. br K bg K bb These three monochrome compensation coefficients, and for each of the other non-reference grayscale binding points, there is a corresponding K. br K bg K bb These three monochrome compensation coefficients, plus at least one grayscale compensation coefficient K gray .

[0091] Furthermore, a set of monochrome compensation coefficients corresponding to all non-grayscale binding points other than the grayscale binding points of each color sub-pixel can be determined by linear interpolation, thereby obtaining a set of monochrome compensation coefficients for each color sub-pixel at each grayscale.

[0092] S3, obtain the initial grayscale value of the second display panel, and determine the corresponding target grayscale value based on the multiple monochrome compensation coefficients and the initial grayscale value.

[0093] Understandably, each initial grayscale value can include a first sub-initial grayscale value corresponding to the first sub-pixel, a second sub-initial grayscale value corresponding to the second sub-pixel, and a third sub-initial grayscale value corresponding to the third sub-pixel. A set of monochrome compensation coefficients can be obtained from the corresponding color sub-pixel based on the value of each of the three sub-pixels. Based on the three sets of monochrome compensation coefficients corresponding to the three sub-pixels, the initial grayscale value is applied to determine the corresponding target grayscale value. Correspondingly, the target grayscale value can also include a first sub-target grayscale value corresponding to the first sub-pixel, a second sub-target grayscale value corresponding to the second sub-pixel, and a third sub-target grayscale value corresponding to the third sub-pixel.

[0094] For example, if the three sub-initial grayscale values ​​in the initial grayscale value are 255, 128, and 128 respectively, the corresponding three sub-target grayscale values ​​can be calculated through this step as 218, 125, and 120 respectively. Therefore, it can be considered that the optical information in the second display panel corresponding to the three sub-target grayscale values ​​can be close to or even equal to the optical information in the first display panel corresponding to the three sub-initial grayscale values ​​(also referred to as the first color mixing optical information here).

[0095] Furthermore, such as Figure 5 As shown, step S3 may include, but is not limited to, the following steps and combinations thereof.

[0096] S31, determine the grayscale value to be verified corresponding to the second display panel based on the plurality of monochrome compensation coefficients and the initial grayscale value.

[0097] The method for determining the grayscale value to be verified here can refer to the method for determining the corresponding target grayscale value in step S3 above. Based on the example in step S3, the optical information corresponding to the grayscale values ​​of the three sub-pixels in the second display panel being 218, 125, and 120 respectively is referred to as the second color mixing optical information here.

[0098] S32, Obtain the first color mixing optical information corresponding to the color mixing image of the first display panel under the initial grayscale value.

[0099] As shown in Table 1, for example, the 4th and 5th images are both mixed-color images, corresponding to the first mixed-color optical information. The three sub-initial grayscale values ​​in the initial grayscale value are 255, 128, and 128 respectively. Then, the optical information corresponding to the grayscale values ​​of the three sub-pixels in the first display panel being 255, 128, and 128 respectively can also be measured, which is also called the first mixed-color optical information here.

[0100] S33, based on the first color mixing optical information, adjust the grayscale value to be verified to adjust the second color mixing optical information of the second display panel corresponding to the color mixing image, so as to determine the target grayscale value.

[0101] Specifically, in this embodiment, based on the grayscale value to be verified determined according to multiple monochrome compensation coefficients and the initial grayscale value (calculated), the grayscale value to be verified (which corresponds to the three sub-grayscale values ​​of the three sub-pixels respectively) is further adjusted with the first color mixing optical information in the first display panel corresponding to the color mixing image as a reference, until the second color mixing optical information in the second display panel at this time can be close to or even the same as the first color mixing optical information in the first display panel. The grayscale value to be verified at this time is the target grayscale value.

[0102] Understandably, in this embodiment, the initial grayscale value is coarsely adjusted using the monochrome compensation coefficient as the first adjustment basis to obtain the grayscale value to be verified. This can quickly determine the grayscale value to be verified where the corresponding second color mixing optical information is close to the first color mixing optical information. Furthermore, the initial grayscale value is finely adjusted using the first color mixing optical information as the second adjustment basis to obtain the target grayscale value, thereby improving the accuracy of the target grayscale value.

[0103] The present invention provides a display device, including a first display panel and a second display panel, for driving the second display panel to emit light according to a target grayscale value as described above.

[0104] Furthermore, the display device can also be used to execute the method for generating the target grayscale value of the splicing screen as described above, which can be implemented by executing program instructions through the controller in the display device.

[0105] Of course, the present invention may also provide a target grayscale value generation device for executing program instructions to implement the target grayscale value generation method of the splicing screen as described above.

[0106] This invention provides a method and apparatus for generating target grayscale values ​​for a video wall display, and a display device thereof. The method includes acquiring multiple first monochrome optical information corresponding to multiple monochrome images on a first display panel, and adjusting multiple second monochrome optical information corresponding to the multiple monochrome images on a second display panel based on the multiple first monochrome optical information to determine multiple monochrome compensation coefficients. Further, it acquires the initial grayscale value of the second display panel, and determines the corresponding target grayscale value based on the multiple monochrome compensation coefficients and the initial grayscale value. In other words, by using the first monochrome optical information of the first display panel as a reference, it adjusts the parameters in the second display panel to obtain second monochrome optical information that matches the first monochrome optical information, thereby determining the monochrome compensation coefficients. This achieves optical compensation for the second display panel, thereby improving the uniformity of the video wall display.

[0107] The above provides a detailed description of the method, equipment, and display device for determining the target compensation ratio provided in the embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of the present invention. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for generating target grayscale values ​​for a video wall, characterized in that, include: Acquire multiple first monochrome optical information corresponding to multiple monochrome images of the first display panel; Based on multiple first monochrome optical information, the second display panel is adjusted to correspond to multiple second monochrome optical information of multiple monochrome images to determine multiple monochrome compensation coefficients, wherein the type of the first display panel is different from the type of the second display panel; Obtain the initial grayscale value of the second display panel, and determine the corresponding target grayscale value based on the multiple monochrome compensation coefficients and the initial grayscale value; The step of adjusting multiple second monochrome optical information of the second display panel corresponding to multiple monochrome images based on multiple first monochrome optical information to determine the corresponding multiple monochrome compensation coefficients includes: Acquire reference monochromatic optical information corresponding to multiple reference grayscale binding points of the first monochromatic optical information; Acquire multiple non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points of the first monochromatic optical information; Based on the reference monochromatic optical information and the multiple non-reference monochromatic optical information, a plurality of monochromatic compensation coefficients are determined; The step of determining multiple monochromatic compensation coefficients based on the reference monochromatic optical information and multiple non-reference monochromatic optical information includes: Based on the reference monochromatic optical information and the monochromatic optical information to be calibrated on the second display panel corresponding to the reference grayscale binding point, determine the reference monochromatic compensation coefficient corresponding to the reference grayscale binding point. Based on the non-reference monochromatic optical information and the reference monochromatic optical information, at least one grayscale compensation coefficient corresponding to the non-reference grayscale binding point is determined, and at least one corresponding non-reference monochromatic compensation coefficient is determined based on the at least one grayscale compensation coefficient and the reference monochromatic compensation coefficient. The reference monochromatic compensation coefficient and the plurality of non-reference monochromatic compensation coefficients constitute a plurality of monochromatic compensation coefficients.

2. The method for generating the target grayscale value of a splicing screen as described in claim 1, characterized in that, The first display panel and the second display panel each include a first sub-pixel, a second sub-pixel, and a third sub-pixel of different colors; The plurality of monochrome images include a plurality of first monochrome images corresponding to a plurality of first grayscale binding points of the first sub-pixel, a plurality of second monochrome images corresponding to a plurality of second grayscale binding points of the second sub-pixel, and a plurality of third monochrome images corresponding to a plurality of third grayscale binding points of the third sub-pixel. The plurality of first monochrome optical information includes a plurality of first sub-optical information corresponding to a plurality of first monochrome images, a plurality of second sub-optical information corresponding to a plurality of second monochrome images, and a plurality of third sub-optical information corresponding to a plurality of third monochrome images.

3. The method for generating the target grayscale value of a splicing screen as described in claim 2, characterized in that, The plurality of first grayscale binding points, the plurality of second grayscale binding points, and the plurality of third grayscale binding points all include the reference grayscale binding point; The step of obtaining reference monochromatic optical information corresponding to reference grayscale binding points for multiple first monochromatic optical information includes: First reference monochromatic optical information corresponding to the reference grayscale binding point is obtained from multiple first sub-optical information; second reference monochromatic optical information corresponding to the reference grayscale binding point is obtained from multiple second sub-optical information; and third reference monochromatic optical information corresponding to the reference grayscale binding point is obtained from multiple third sub-optical information.

4. The method for generating the target grayscale value of a splicing screen as described in claim 3, characterized in that, The plurality of first grayscale binding points, the plurality of second grayscale binding points, and the plurality of third grayscale binding points all include the plurality of non-reference grayscale binding points; The step of acquiring multiple non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points of the first monochromatic optical information includes: Multiple first non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points are obtained from multiple first sub-optical information; multiple second non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points are obtained from multiple second sub-optical information; and multiple third non-reference monochromatic optical information corresponding to multiple non-reference grayscale binding points are obtained from multiple third sub-optical information.

5. The method for generating the target grayscale value of a splicing screen as described in claim 1, characterized in that, The step of obtaining the initial grayscale value of the second display panel and determining the corresponding target grayscale value based on the plurality of monochrome compensation coefficients and the initial grayscale value includes: Based on the multiple monochrome compensation coefficients and the initial grayscale value, determine the grayscale value to be verified corresponding to the second display panel; Obtain the first color mixing optical information corresponding to the color mixing image of the first display panel under the initial grayscale value; Based on the first color mixing optical information, the grayscale value to be verified is adjusted to adjust the second color mixing optical information of the second display panel corresponding to the color mixing image, so as to determine the target grayscale value.

6. A display device, characterized in that, The first display panel and the second display panel, which are spliced ​​together as described in any one of claims 1 to 5, are used to drive the second display panel to emit light according to the target grayscale value as described in any one of claims 1 to 5.

7. The display device as claimed in claim 6, characterized in that, include: A controller, the controller being used to execute program instructions to implement the method for generating target grayscale values ​​for a splicing screen as described in any one of claims 1 to 5.

8. A device for generating target grayscale values, characterized in that, Used to execute program instructions to implement the method for generating target grayscale values ​​for a splicing screen as described in any one of claims 1 to 5.

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