CN115019721A

CN115019721A - Tiled display device, control method thereof, control device and storage medium

Info

Publication number: CN115019721A
Application number: CN202210615809.XA
Authority: CN
Inventors: 侯峰; 吴艳红; 陈冠男; 段然; 王显
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-09-06
Also published as: WO2023231769A1; WO2023231769A9

Abstract

The embodiment of the application provides a splicing display device and a control method, a control device and a storage medium thereof, wherein the control method of the splicing display device comprises the steps of obtaining a first gray image, determining a space heat influence image of the splicing display device based on the first gray image, and obtaining the first gray image based on an original image through gray processing; performing time accumulation on the space heat influence image to obtain a time heat accumulation image; mapping the temporal heat accumulation image to a second grayscale image; and subtracting the second gray image from the R channel component in the original image to obtain a compensated image. According to the embodiment of the application, the ghost shadow can be weakened, so that the screen display picture is uniform when the whole screen is switched to the same gray level for display, and the display effect and the user experience are improved.

Description

Tiled display device, control method thereof, control device and storage medium

Technical Field

The application relates to the technical field of display, in particular to a tiled display device and a control method, a control device and a storage medium thereof.

Background

At present, a tiled Display device is widely applied, for example, a Liquid Crystal Display (LCD) with LED backlight still occupies a dominant position in the market, and as a passive light emitting Display device, the light source utilization efficiency and the subjective image quality are difficult to improve. In order to obtain better display effects on electronic devices such as televisions, mobile phones, and wearing, new display technologies such as OLED (Organic Light-Emitting Diode), MiniLED (referred to as "submillimeter Light-Emitting Diode"), and micro LED (LED miniaturized) have been developed. The LED is a light emitting diode, and the MiniLED has smaller size and finer display effect than the common LED. Compared with the OLED, the MiniLED has the advantages of electricity saving, prolonged display life, low cost and similar display effect.

However, in the display process of the tiled display device, for example, the luminous efficiency of the MiniLED lamp for the screen display is directly affected by the thermal effect of the MiniLED lamp, which is generated by the magnitude of the current value for driving the MiniLED lamp to emit light. In the display process of the MiniLED tiled display device, the driving current value of the MiniLED lamp is positively correlated with the gray value displayed by the MiniLED lamp, and the larger the gray value is, the larger the driving current value is, and the more heat is generated by the MiniLED lamp.

When different grays are displayed in different areas of the screen, the heat accumulation of the different areas of the screen is different, so that the luminous efficiency of the MiniLED lamp in the different areas of the screen is different, for example, in the area with more heat accumulation, the luminous efficiency of the MiniLED lamp is reduced, in the area with less heat accumulation, the luminous efficiency of the MiniLED lamp is still higher, after the screen is lightened for a long time, when the whole screen is switched to the same grayscale for display, ghost shadow easily appears in the area with more heat accumulation and low MiniLED luminous efficiency, and finally, the phenomenon that the display picture is not uniform appears on the screen when the whole screen is switched to the same grayscale for display is caused, the display effect is reduced, and the user experience is influenced.

Disclosure of Invention

The splicing display device and the control method, the control device and the storage medium thereof are provided for overcoming the defects of the prior art, and the technical problems that in the prior art, residual shadows are prone to appearing in areas with high heat accumulation and low MiniLED luminous efficiency, and finally, when a whole screen is switched to the same gray level for display, the display picture of the screen is uneven are solved.

In a first aspect, an embodiment of the present application provides a control method for a tiled display device, including:

acquiring a first gray image, and determining a space heat influence image of the splicing display device based on the first gray image, wherein the first gray image is obtained by performing gray processing on an original image;

performing time accumulation on the space heat influence image to obtain a time heat accumulation image;

mapping the temporal heat accumulation image to a second grayscale image;

and subtracting the second gray image from the R channel component in the original image to obtain a compensated image.

In one possible implementation, determining a spatial heat affected image of a tiled display device based on a first grayscale image in a spatial dimension includes:

simulating heat diffusion information of the pattern in the first gray level image to generate a pattern edge diffusion image;

and determining the space heat influence image of the spliced display device based on the pattern edge diffusion image.

In one possible implementation, simulating heat diffusion information of a pattern in a first grayscale image, and generating a pattern edge diffusion image, includes:

reducing a gray value of a first area outside the edge of the pattern in the first gray image, increasing a gray value of a second area inside the edge of the pattern in the first gray image, wherein the increased gray value is equal to the reduced gray value, and obtaining a pattern edge diffusion image; or, increasing a gray value to a first area outside the edge of the pattern in the first gray image, and decreasing a gray value to a second area inside the edge of the pattern in the first gray image, wherein the increased gray value is equal to the decreased gray value, so as to obtain the pattern edge diffusion image.

In one possible implementation manner, the tiled display device includes a tiled display panel, and the tiled display panel includes at least two display panels tiled with each other;

and determining a spatial heat influence image of the tiled display device based on the pattern edge diffusion image, comprising:

performing segmentation processing on the pattern edge diffusion image with the same size as the spliced display panel to obtain at least two unit images with the same size as the display panel;

determining a unit space heat influence image of each unit image;

and determining the space heat influence image of the spliced display panel based on the space heat influence image of each unit.

In one possible implementation, determining the cellular space thermal influence image for each cellular image includes:

determining heat influence data of the central unit image on the central unit image to obtain a first space heat influence image;

determining heat influence data of the peripheral unit images on the central unit image to obtain a plurality of second space heat influence images; the peripheral unit image is positioned at the periphery of the central unit image;

and adding the first space heat influence image and the plurality of second space heat influence images to obtain a unit space heat influence image.

In one possible implementation, determining the heat influence data of the surrounding unit images to the central unit image to obtain a plurality of second spatial heat influence images includes:

and longitudinally cutting the peripheral unit image and the central unit image into N equal parts of image blocks and/or transversely cutting the peripheral unit image and the central unit image into N equal parts of image blocks or longitudinally and transversely cutting the peripheral unit image and the central unit image into N equal parts of image blocks together, determining heat influence data of the peripheral unit image on the central unit image, and obtaining a plurality of second space heat influence images.

In one possible implementation manner, the longitudinally dividing the peripheral unit image and the central unit image into N equal parts of image blocks and/or transversely dividing the peripheral unit image and the central unit image into N equal parts of image blocks, and determining thermal influence data of the peripheral unit image on the central unit image to obtain a plurality of second spatial thermal influence images includes:

the peripheral unit image which is directly adjacent to the central unit image in the transverse direction is a first peripheral unit image, the first peripheral unit image and the central unit image are longitudinally divided into N1 equal parts of image blocks respectively, and heat influence data of the first peripheral unit image on the central unit image are determined to obtain a third heat influence image; the plurality of second spatial heat influencing images comprises a plurality of third heat influencing images;

the peripheral unit image which is directly and longitudinally adjacent to the central unit image is a third peripheral unit image, the third peripheral unit image and the central unit image are transversely divided into N2 equal image blocks respectively, and heat influence data of the third peripheral unit image on the central unit image are determined to obtain a seventh heat influence image; the plurality of second spatial heat influencing images includes a plurality of seventh heat influencing images.

In a possible implementation manner, the longitudinally dividing the peripheral unit image and the central unit image into N equal parts of image blocks and/or transversely dividing the peripheral unit image and the central unit image into N equal parts of image blocks, determining the heat influence data of the peripheral unit image on the central unit image, and obtaining a plurality of second space heat influence images, includes:

the peripheral unit image which is not directly adjacent to the central unit image is a second peripheral unit image, the second peripheral unit image and the central unit image are longitudinally divided into N1 equal parts of image blocks respectively, and longitudinal heat influence data of the second peripheral unit image on the central unit image are determined to obtain a fourth heat influence image; transversely dividing the second surrounding unit image and the central unit image into N2 equal image blocks respectively, and determining transverse heat influence data of the second surrounding unit image on the central unit image to obtain a fifth heat influence image; adding the fourth heat-affected image and the fifth heat-affected image and taking the average to obtain a sixth heat-affected image; the plurality of second spatial heat influencing images includes a plurality of sixth heat influencing images.

In one possible implementation, the time accumulating the spatial heat influence image to obtain a time heat accumulated image includes:

constructing a heat gray level lookup table;

when the gray value of the pixel point of the first gray image is larger than or equal to the gray value in the lookup table, adding the heat accumulated value of the pixel point of the previous n-1 frame image and the instantaneous heat value of the pixel point of the space heat influence image of the pixel point of the current frame image to obtain the heat accumulated value of the pixel point of the previous n frame image as a time heat accumulated image;

when the gray value of the pixel point of the first gray image is smaller than the gray value in the lookup table, subtracting the heat accumulated value of the pixel point of the previous n-1 frame image from the instantaneous heat value of the pixel point of the space heat influence image of the pixel point of the current frame image to obtain the heat accumulated value of the pixel point of the previous n frame image as a time heat accumulated image.

In one possible implementation, constructing the heat gray level lookup table includes:

determining a corresponding relation between a plurality of gray values and a plurality of stable heat values, wherein the stable heat values are the heat of the splicing display device when the image of the same gray value is continuously displayed on the splicing display device in a full screen mode for a threshold time;

and selecting a corresponding relation between at least one gray value and at least one stable heat value in the designed heat value range as a heat gray level lookup table.

In one possible implementation, the original image comprises an RGB image.

In a second aspect, an embodiment of the present application provides a control device for a tiled display device, including:

the space heat module is used for acquiring a first gray level image, determining a space heat influence image of the splicing display device based on the first gray level image, wherein the first gray level image is obtained by graying an original image;

the time heat module is used for carrying out time accumulation on the space heat influence image to obtain a time heat accumulation image;

a second gray scale module for mapping the time-heat accumulated image to a second gray scale image;

and the compensation module is used for subtracting the second gray image from the R channel component in the original image to obtain a compensated image.

In a third aspect, an embodiment of the present application provides a tiled display device, including:

the spliced display panel comprises a plurality of display panels spliced with each other;

a memory;

the processor is electrically connected with the memory and the spliced display panel;

the memory stores a computer program which is executed by the processor to implement the control method of the tiled display apparatus according to the first aspect.

In a fourth aspect, the present application provides a computer-readable storage medium for storing computer instructions, which when executed on a computer, enable the computer to execute the control method for the tiled display apparatus according to the first aspect.

The beneficial technical effects brought by the technical scheme provided by the embodiment of the application comprise:

according to the control method of the tiled display device, the space heat influence image of the tiled display device is determined on the basis of the first gray level image in the space dimension, the first gray level image is obtained through graying processing on the basis of the RGB image, time accumulation is carried out on the space heat influence image in the time dimension to obtain a time heat accumulation image, then the time heat accumulation image is mapped into the second gray level image, and the second gray level image is a compensation image, namely a gray level value needing to be compensated; and then, subtracting the second gray image from the R channel component in the RGB image to obtain a compensated image.

Because the screen is in the area with much heat accumulation, the luminous efficiency of the luminous unit is reduced, the luminous efficiency of the luminous unit is still higher in the area with little heat accumulation, and the afterimage is easy to appear in the area with low luminous efficiency of the heat accumulation multi-luminous unit, the embodiment of the application obtains the heat accumulation image in the space dimension and the time dimension, and maps the heat accumulation image into the gray image, namely the compensation image, the image gray value of the area with high luminous efficiency needs to be reduced by a little, the second gray image is subtracted from the R channel component of the RGB image, so that the gray value becomes smaller by a little, the afterimage is weakened, the screen display picture is uniform when the whole screen is switched to the same gray display, and the display effect and the user experience are improved.

Furthermore, as can be seen from the background description, the luminous efficiency of the MiniLED lamp is affected by the temperature, and the heat is accumulated to a certain extent, so that the temperature increases, and the luminous efficiency of the MiniLED lamp becomes lower. After a certain pattern is lighted on the MiniLED screen for a long time (the pattern is non-white, and the background is all white), the temperature of the area where the pattern is located is low (the heat accumulation is less), the temperature of the background area is high (the heat accumulation is more), the luminous efficiency of the MiniLED lamp at the place with high temperature is lower, and the luminous efficiency of the MiniLED lamp at the place with low temperature is still higher. In order to make the image display more uniform, the image gray value of the area with high luminous efficiency needs to be reduced by a little, the second gray image can be subtracted from the R channel component of the RGB image, so that the gray value becomes smaller by a little, the ghost can be weakened, the screen display image is uniform when the whole screen is switched to the same gray display, and the display effect and the user experience are improved.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic flowchart of a control method of a tiled display device according to an embodiment of the present disclosure;

fig. 2 is a schematic flow chart illustrating a process of determining a spatial heat influence image of a tiled display device in a spatial dimension according to an embodiment of the present application;

FIG. 3a is a schematic diagram illustrating the heat diffusion result of a heat source after 10 time units have elapsed according to an embodiment of the present application;

FIG. 3b is a graph showing the heat diffusion result after 15 time units from a heat source according to an embodiment of the present invention;

FIG. 3c is a graph illustrating the heat diffusion results after 50 time units have elapsed for a heat source according to an embodiment of the present application;

fig. 4 is a schematic diagram illustrating generation of a pattern edge diffusion image by simulating heat diffusion information of a pattern in a first gray scale image according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a tiled display panel including a pattern edge diffusion image according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of longitudinal splitting according to an embodiment of the present application;

FIG. 7 is a schematic view of another longitudinal split provided in an embodiment of the present application;

FIG. 8 is a schematic diagram of a cross-cut provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of a cellular space heat influencing image of a cellular image A5 provided by an embodiment of the present application;

fig. 10 is a schematic diagram of a plurality of image blocks cut into a plurality of image blocks in a horizontal direction and a vertical direction according to an embodiment of the present application;

fig. 11 is a schematic flow chart of an a4 stack according to an embodiment of the present disclosure;

fig. 12 is a schematic flowchart of a control method for a tiled display apparatus according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a control device of a tiled display device according to an embodiment of the present application;

fig. 14 is an effect diagram of a control method of a tiled display device according to an embodiment of the present application;

fig. 15 is an enlarged view of an effect diagram in fig. 14 according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

The inventor of the present application has studied and found that, when solving the problem of non-uniform display effect of the MiniLED tiled display device, the prediction of the amount of heat at different positions of the screen is critical.

Due to different heat accumulation in different areas of the screen, the MiniLED lamps in different areas of the screen have different luminous efficiency. Because the light emitting efficiency of the MiniLED lamps in different areas is different, the screen has ghost shadows when the full screen is switched to the same gray scale for display.

For example, after the screen is turned on for a period of time, the heat accumulation in the first area is large, which results in the luminous efficiency of the MiniLED in the first area being reduced by 30%, the heat accumulation in the second area is small, which results in the luminous efficiency of the MiniLED in the second area being reduced by 10%, the luminous efficiency of the MiniLED in the first area is lower than that of the MiniLED in the second area, and when the screen is switched to the same brightness, the afterimage is likely to appear in the first area.

Ghost easily appears in the area that heat accumulation is many, MiniLED luminous efficiency is low, finally leads to whole screen to appear the inhomogeneous phenomenon of display screen when switching to same grey level and showing, reduces display effect, influences user experience.

The application provides a tiled display device, a control method thereof, a control device and a storage medium, and aims to solve the technical problems in the prior art.

The following describes the technical solution of the present application and how to solve the above technical problems in detail by specific embodiments.

The embodiment of the application provides a control method of a tiled display device, wherein the tiled display device can comprise a MiniLED tiled display device, the flow schematic diagram of the method is shown in figure 1, and the method comprises the following steps:

s1: acquiring a first gray image, and determining a space heat influence image of the splicing display device based on the first gray image, wherein the first gray image is obtained by carrying out gray processing on the basis of an original image;

s2: performing time accumulation on the space heat influence image to obtain a time heat accumulation image;

s3: mapping the temporal heat accumulation image to a second grayscale image;

s4: and subtracting the second gray image from the R channel component in the original image to obtain a compensated image.

The second gray scale image is a compensated image.

Optionally, the original image comprises an RGB image. The RGB image is a color image, and the original image is an image input by an external video stream.

S1 is determining the spatial heat influence image of the tiled display device from the spatial dimension, i.e. from the thermal diffusion information dimension of the first gray scale image across the screen of the tiled display device.

S2 is a temporal heat accumulation image determined from the temporal dimension, i.e. from the heat accumulation effect of the spatial heat influence images of different frames on the time line.

Furthermore, as can be seen from the background description, the luminous efficiency of the MiniLED lamp is affected by the temperature, the heat is accumulated to a certain extent, the temperature is increased, and the luminous efficiency of the MiniLED lamp is lowered. After a certain pattern is lighted on the MiniLED screen for a long time (the pattern is non-white, and the background is all white), the temperature of the area where the pattern is located is low (the heat accumulation is less), the temperature of the background area is high (the heat accumulation is more), the luminous efficiency of the MiniLED lamp at the place with high temperature is lower, and the luminous efficiency of the MiniLED lamp at the place with low temperature is still higher. In order to make the image display more uniform, the image gray value of the area with high luminous efficiency needs to be reduced by a little, the second gray image can be subtracted from the R channel component of the RGB image, so that the gray value becomes smaller by a little, the ghost can be weakened, the screen display image is uniform when the whole screen is switched to the same gray display, and the display effect and the user experience are improved.

Alternatively, the gray value of the second gray scale image does not exceed 15 in general, and actually, the contribution of each frame to the heat accumulation is very small, and the gray value in the second gray scale image obtained after accumulating tens of thousands of frames does not exceed 15.

The purpose of the embodiment of the application is to determine the gray value needing compensation by estimating the accumulated heat in space and time, and the estimation of the heat accumulation is only an intermediate variable.

In some embodiments, as shown in fig. 2, determining a spatial heat affected image of the tiled display device based on the first grayscale image in a spatial dimension includes:

s11: simulating heat diffusion information of the pattern in the first gray level image to generate a pattern edge diffusion image;

s12: and determining the space heat influence image of the spliced display device based on the pattern edge diffusion image.

Optionally, the first grayscale image may include one pattern or a plurality of patterns, and the pattern edge diffusion image of the entire screen may be finally generated by constructing a graph edge diffusion model and simulating heat diffusion information of each pattern.

In some embodiments, as shown in fig. 4, simulating heat spread information of a pattern in the first grayscale image, generating a pattern edge spread image, comprises:

the first area outside the edge of the pattern in the first gray image is decreased by a gray value Δ G, the second area inside the edge of the pattern in the first gray image is increased by a gray value Δ G, and the increased gray value Δ G is equal to the decreased gray value Δ G, so as to obtain the pattern edge diffusion image (as shown in fig. 4).

Alternatively, a gray value Δ G is added to a first region outside the edge of the pattern in the first gray image, a gray value Δ G is subtracted from a second region inside the edge of the pattern in the first gray image, and the added gray value Δ G is equal to the subtracted gray value Δ G, so as to obtain a pattern edge diffusion image (not shown).

For step S11, specifically, two schemes may be adopted to simulate the heat diffusion information of the pattern in the first grayscale image, and generate the pattern edge diffusion image, as follows:

1. by means of two-dimensional diffusion equations

The heat diffusion of the splicing display device meets a two-dimensional heat diffusion equation, which can be written in the following form:

using forward difference for the time term and central difference for the space term, the discrete form of the equation can be obtained as follows:

in the above formula, u represents the heat value of the heat source, v represents the diffusion velocity, t represents time, x represents the heat diffusion distance of the heat source in the longitudinal direction, y represents the heat diffusion distance of the heat source in the lateral direction, and n represents a time unit.

Modeling the diffusion process, constructing a pattern heat diffusion model (i.e. a two-dimensional heat diffusion model), and using program simulation, the visualization results can be obtained as shown in fig. 3a to 3c, which show the heat diffusion results of the heat source after 10, 15 and 50 time units have elapsed in fig. 3a to 3c, respectively.

It should be noted that, when the pattern is lit on the screen of the tiled display device for a long time, the heat in the area where the pattern is located may be diffused, and the heat diffusion process may be represented by the pattern heat diffusion model. And inputting the first gray image into a pattern heat diffusion model, wherein the pattern heat diffusion model outputs a pattern edge diffusion image subjected to simulated heat diffusion.

Fig. 3a to 3c show the heat diffusion results after the heat source has passed through different times, and the higher the pattern, the higher the heat quantity. When the time is short, the range of the heat source is small, and the heat quantity is high; when the time is longer, the heat source range is large and the heat quantity is low. And inputting the first gray image into a pattern heat diffusion model to obtain a pattern edge diffusion image subjected to simulated heat diffusion, wherein the obtained pattern edge diffusion image is similar to a graph obtained after Gaussian edge blurring.

2. By means of Gaussian blur

In the practical application process, considering that the two-dimensional heat diffusion equation has large calculation amount and cannot reach real-time factors, in order to reach the real-time factors, the edge blurring is performed on the first gray level image in a Gaussian blurring mode, and the specific operations are as follows:

within a certain range, the edge of the pattern of the first gray image is taken as a boundary, if the gray level of the pattern is lower than the background gray level, the gray level of the pixel points in the pattern is increased, and the gray level of the pixel points outside the pattern is decreased. If the pattern gray level is higher than the background gray level, the gray level of the pixel points in the pattern is decreased, and the gray level of the pixel points outside the pattern is increased.

As shown in fig. 4, if the background of the first gray image is white and the pattern is black, the gray value of a certain pixel inside the pattern of the first gray image is increased by Δ G using the edge of the pattern of the first gray image as a boundary, and the gray value of the pixel at the mirror image position is decreased by Δ G, the more the gray value of the pixel closer to the edge of the pattern of the first gray image is increased/decreased, and if the background of the first gray image is black and the pattern is white, the gray value of the certain pixel inside the pattern of the first gray image is decreased by Δ G using the edge of the pattern of the first gray image as a boundary, and the gray value of the pixel at the mirror image position is increased by Δ G. As shown in fig. 4. The clear pattern of the boundary in the original first gray level image is changed into a fuzzy pattern of the boundary, and a pattern edge diffusion image is formed. The rectangle in fig. 4 represents a pattern, and the three nested rectangles are gradually lighter in color from inside to outside, indicating the diffusion of heat. Fig. 4 is merely an example, and a plurality of patterns may be further included in the first gray image.

It will be appreciated that the amount of heat is constant, and if the temperature is modelled by grey values, the amount of grey values is constant, and that the diffusion process can be modelled as a pixel reduction value near the edge of the image shifting to a position symmetrical thereto, thereby ensuring that the amount of grey values is constant.

In some embodiments, a tiled display device includes tiled display panels, the tiled display panels including at least two display panels tiled relative to each other; the tiled display panel can be referred to as a tiled screen and the display panel can be referred to as a unit screen.

And determining a spatial heat impact image of the tiled display device based on the pattern edge diffusion image, comprising:

determining a unit space heat influence image of each unit image;

In some embodiments, determining the cellular space thermal influence image for each cellular image comprises:

The second spatial heat influencing image may be the same or different.

In some embodiments, determining the thermal influence data of the surrounding cell images on the central cell image, resulting in a plurality of second spatial thermal influence images, comprises:

In some embodiments, the longitudinally and/or transversely dividing the peripheral unit image and the central unit image into N equal parts of image blocks, and determining the thermal influence data of the peripheral unit image on the central unit image to obtain a plurality of second spatial thermal influence images includes:

the peripheral unit image which is directly adjacent to the central unit image in the transverse direction (left and right) is a first peripheral unit image, the first peripheral unit image and the central unit image are longitudinally divided into N1 equal parts of image blocks respectively, and heat influence data of the first peripheral unit image on the central unit image are determined to obtain a third heat influence image; the plurality of second spatial heat influencing images comprises a plurality of third heat influencing images;

the peripheral unit image which is vertically (vertically) directly adjacent to the central unit image is a third peripheral unit image, the third peripheral unit image and the central unit image are transversely divided into N2 equal image blocks respectively, and heat influence data of the third peripheral unit image on the central unit image are determined to obtain a seventh heat influence image; the plurality of second spatial heat influencing images includes a plurality of seventh heat influencing images.

The plurality of third heat influencing images may be the same or different.

The plurality of seventh heat influencing images may be the same or different.

In the present application, N, N1 and N2 are both integers not less than 1, and how many equal parts of image blocks are specifically split may be determined according to actual situations, which is not limited in the present application.

Specifically, the heat diffusion of the spliced display device can be simulated by constructing a screen characteristic model.

As shown in fig. 5, the tiled display device may include a6 × 6 display module, and the tiled display device may include 288 tiled display panels (unit screens) arranged in an array. The thermal diffusion characteristics inside the display panel and between the display panels are greatly different, so that the joint seam between the display panels must be considered when the thermal characteristic modeling is carried out, and the ghost compensation modeling can be carried out more accurately.

In consideration of the limited heat diffusion range, in the screen characteristic modeling process designed by the present application, only the area size of the region constructed by the display panel in the 3 × 3 range is considered.

As shown in FIG. 5, for a certain 3 × 3 range of area in the whole screen of the tiled display apparatus, each display panel Ai (i ≧ 1) represents a display panel of the smallest tiled unit.

For 9 display panels of a size in the range of 3 × 3 as shown in fig. 6, they are numbered a1 to a9 in order from top to bottom and from left to right, respectively. For any one display panel a5 in the whole large screen of the tiled display device, only the thermal influence of the surrounding 8 display panels on the display panel a5 can be considered.

Specifically, the pattern edge diffusion image is subjected to segmentation processing to obtain a unit image with the same size as that of the display panel Ai; the size of the pattern edge diffusion image is equal to the size of the whole screen of the splicing display device, and the display panels Ai (i is more than or equal to 1) correspond to the unit images Ai (i is more than or equal to 1) in a one-to-one mode and are equal in size.

Then, determining a unit space heat influence image of each unit image;

then, based on each unit space heat influence image, a space heat influence image corresponding to the whole screen of the tiled display device is determined. For example, each unit space heat influence image can be spliced to form a corresponding space heat influence image of the whole screen.

Firstly, determining heat influence data of peripheral unit images on the central unit image to obtain a plurality of second space heat influence images; the surrounding cell image is located at the periphery of the central cell image. The method comprises the following specific steps:

1. for the surrounding cell images directly adjacent to the center cell image, as shown in fig. 5 and 6, the center cell image a5, the surrounding cell images directly adjacent to a5 include a2, a4, a6, and A8. A4 and A6 which are directly adjacent to A5 left and right can respectively carry out image blocks which are longitudinally divided into 4 equal parts, and the operation and calculation of A4 and A6 are the same. A2 and A8 which are directly adjacent to A5 up and down can be transversely divided into 6 equal parts of image blocks respectively, and the operation and calculation of A2 and A8 are the same.

For example, a4 and a5 are longitudinally divided into 4 equal parts of image blocks, and the heat influence data of a4 on a5 are determined, so that a third heat influence image a4 stack is obtained.

Calculation of the heat impact data of a4 on a5, i.e., calculation of the impact of the heat generated by a4 on a5, is manifested in a change in the a5 heat accumulation value.

A44 fold ═ (α 1 × a44+ α 2 × a43+ α 3 × a42+ α 4 × a41) × edge diffusion coefficient β;

a43 stack ═ α 5 × a44 stack;

a42 stack ═ α 6 × a44 stack;

a41 stack α 7 × a44 stack;

a4 stack (third heat affected image) is stitched a44 stack to a41 stack.

In the above expression, a44 is stacked as heat influence data of a4 on a51, a43 is stacked as heat influence data of a4 on a52, a42 is stacked as heat influence data of a4 on a53, and a41 is stacked as heat influence data of a4 on a 54.

As shown in fig. 6, a4 and a5 are longitudinally divided into 4 parts, and a44 is closest to a51, so that a44 has the greatest influence on a51, and the value of the corresponding coefficient α 1 is also the greatest; a41 is farthest from a51, so a41 has the least effect on a51, and its corresponding coefficient α 4 has the least value. In practice, the values of α 1 to α 4 are determined by the proportionality coefficient between the amounts of heat on the calorimetric maps.

The edge diffusion coefficient β represents a diffusion characteristic between different unit images, and since there is a seam between adjacent display panels (unit panels), heat diffusion between unit images is affected by the seam, and this effect can be modeled as a diffusion coefficient β.

A52 is a little further from a4, so that the thermal impact of a4 on a52 is smaller than the thermal impact of a4 on a51, which can be represented by a44 fold multiplied by a factor α 5. In practice, only a4 is lighted, and the heat mean value of a52 divided by the heat mean value of a51 is a value of α 5, α 6 and α 7 are the same.

2. For the surrounding cell images not directly adjacent to the center cell image, as shown in fig. 5, 7, and 8, the center cell image a5, the surrounding cell image not directly adjacent to a5 includes a1, A3, a7, and a 9. For example, a1 and a5 are respectively subjected to secondary segmentation, first segmentation is performed, a1 and a5 are respectively subjected to longitudinal segmentation into 4 equal parts of image blocks to obtain a fourth heat-affected image a1_ col stack, then secondary segmentation is performed, a1 and a5 are respectively subjected to transverse segmentation into 6 equal parts of image blocks to obtain a fifth heat-affected image a1_ row stack, and the fourth heat-affected image a1_ col stack and the fifth heat-affected image a1_ row stack are added and averaged to obtain a sixth heat-affected image a1 stack. Similarly, A3, a7, a9 operate the same as a 1.

Calculation of the heat impact data of a1 on a5, i.e., calculation of the impact of the heat generated by a1 on a5, is manifested in a change in the a5 heat accumulation value.

(1) First cutting (longitudinal cutting), as shown in fig. 7.

A14 double ═ α 1 × a44+ α 2 × a43+ α 3 × a42+ α 4 × a41) × edge diffusion coefficient β;

a13 stack ═ α 5 × a44 stack;

a12 stack ═ α 6 × a44 stack;

a11 stack ═ α 7 × a44 stack;

a1_ col stack (fourth heat-affected image) is stitched a11 stack to a14 stack.

In the above expression, a14 is stacked as heat influence data of a1 on a51, a13 is stacked as heat influence data of a1 on a52, a12 is stacked as heat influence data of a1 on a53, and a11 is stacked as heat influence data of a1 on a 54.

(2) A second cut (cross cut) as shown in fig. 8. (A2 and A8 are the same as the calculation method of the cross cut, A2 and A8 are not shown).

A110 stack ═ α 1 × a110+ α 2 × a19+ α 3 × a18+ α 4 × a17+ α 5 × a16+ α 6 × a17) × edge diffusion coefficient β;

a19 stack ═ α 7 × a110 stack;

a18 stack ═ α 8 × a110 stack;

a17 stack ═ α 9 × a110 stack;

a16 stack α 10 × a110 stack;

a15 stack ═ α 11 × a110 stack;

the A1_ row stack (fifth heat-affected image) is spliced by stacking a15 onto the a110 stack.

In the above expression, a110 is stacked as heat influence data of A1 on a55, A1 is stacked as heat influence data of a19 on a56, and … … and a15 are stacked as heat influence data of A1 on a 550.

(3) A1 stack (sixth heat-affected image) ═ a1_ col stack + a1_ row stack)/2.

The A1 is positioned at the upper left corner of the A5, so the influence of the A1 on the A5 is longitudinal and transverse, the A1 can be cut twice, the longitudinal influence and the transverse influence are respectively calculated, the calculation mode is the same as the calculation process of the influence of the A4 on the A5, and finally the influence of the A1 on the A5 can be obtained by summing and averaging the longitudinal influence and the transverse influence.

In the above manner, a third heat affected image a4 stack and a6 stack, a seventh heat affected image a2 stack and A8 stack, and a sixth heat affected image a1 stack, A3 stack, a7 stack, a9 stack, respectively, are available. The plurality of second spatial heat affected images includes an a2 stack, an a4 stack, an a6 stack, an A8 stack, an a1 stack, an A3 stack, an a7 stack, an a9 stack.

Through the above calculation process, the thermal influence of the 8 peripheral cell images (a2, a4, a6, A8, a1, A3, a7, and a9) on the central cell image a5 can be obtained, and then uniformly superimposed together to obtain the ambient thermal influence of a5, that is, the ambient thermal accumulation of a5 (thermal influence data of the peripheral cell images on the central cell image).

The heat accumulation around a5 (the second spatial heat-influencing image addition of a plurality) is a2 stack + a4 stack + a6 stack + A8 stack + a1 stack + A3 stack + a7 stack + a9 stack.

Secondly, determining the heat influence data of the central unit image on the central unit image to obtain a first space heat influence image. The method comprises the following specific steps:

a5 self heat accumulation (first spatial heat influence image) is a5 × a5 weight image (weight coefficients are all 1).

The weighting factors are all 1, and a5 × a5 weighted image is equivalent to no calculation because all are multiplied by 1.

Finally, as shown in fig. 10, the heat accumulation of a5 itself and the heat accumulation around a5 are added to obtain a5 cell space heat influence image. Namely, the cell space heat influence image of a5 is a5 own heat accumulation + a5 ambient heat accumulation.

Then, the same method is adopted for all spliced display panels (unit screens) in the spliced display device, and a unit space heat influence image of each unit image, namely a unit space heat influence image of Ai (i is more than or equal to 1), can be obtained.

And splicing the obtained unit space heat influence images based on Ai (i is more than or equal to 1) to obtain the space heat influence images corresponding to the whole screen of the spliced display device.

It should be noted that, if the cell image A1 is located at the upper left corner of the whole screen image, first, the thermal influence of the surrounding cell images A2, A4 and A5 on A1 is determined, and then the thermal influence is uniformly superimposed to obtain the surrounding thermal influence of A1, that is, the surrounding thermal accumulation of A1 (thermal influence data of the surrounding cell images on the central cell image)

The heat accumulation around a1 (the second spatial heat-affected image addition of a plurality) is a2 stack + a4 stack + a5 stack; (calculation methods are as above)

Next, the heat influence data of the cell image a1 on itself is determined, and a first spatial heat influence image is obtained. The method comprises the following specific steps:

a1 self heat accumulation (first spatial heat influence image) is a1 × a1 weight image (weight coefficients are all 1).

Finally, the cell space heat of a1 affects the image a1 self heat accumulation + a1 ambient heat accumulation.

Similarly, if the cell image a7 is located at the lower left corner of the whole screen image, A3 is located at the upper right corner of the whole screen image, and a9 is located at the lower right corner of the whole screen image, the calculation method is the same as above.

In other embodiments, as shown in fig. 10, in the screen characteristic model construction, the segmentation scheme of the unit image may adopt longitudinal and transverse co-segmentation, i.e. block segmentation, when performing the influence degree calculation, one small block in a4 is taken to calculate the influence of the small block in a5, and the like, the influence of all the small blocks in a4 on all the small blocks in a5 is calculated, and the influence of a4 on a5 is obtained after superposition, as shown in fig. 10.

The segmentation quantity of the unit image can be flexible and changeable, the more the segmentation quantity is, the more accurate the calculation result is, but the larger the calculation quantity is. In the actual use process, the device can be flexibly configured according to the balance of the effect and the speed.

In some embodiments, the longitudinally dividing the peripheral unit image and the central unit image into N equal parts, or transversely dividing the peripheral unit image and the central unit image into N equal parts, or longitudinally and transversely dividing the peripheral unit image and the central unit image into N equal parts, respectively, includes:

adding the surrounding unit image and the mean value image of the surrounding unit image to obtain a first image;

multiplying the first image by the weight image of the surrounding unit image to obtain a second image;

longitudinally cutting the second image into N equal parts of image blocks, or transversely cutting the second image into N equal parts of image blocks, or longitudinally and transversely cutting the second image into N equal parts of image blocks;

and determining heat influence data of the peripheral unit images to the central unit image to obtain a plurality of second space heat influence images, wherein the steps comprise:

adding the N equal parts of image blocks of the surrounding image units to obtain an equal part of image block;

carrying out mirror image turning on the image of one equal part to obtain an image block of the other equal part;

multiplying the other equal-part image block by different coefficients to obtain heat influence data of the N equal-part image blocks of the peripheral image unit on the N equal-part image blocks of the central unit image corresponding to the N equal-part image blocks respectively;

splicing the N equal parts of heat influence data to obtain heat influence data of the peripheral unit images on the central unit image;

and obtaining a second space heat influence image based on the heat influence data of the peripheral unit image to the central unit image.

Illustratively, as shown in FIG. 11.

Adding the surrounding cell image a4 and the mean image (a4_ mean) of the surrounding cell image a4 to obtain a first image;

multiplying the first image by the weight image (a4_ weight) of the surrounding cell image a4 to obtain a second image;

longitudinally cutting the second image into 4 equal parts of image blocks;

adding 4 equal parts of image blocks of the surrounding image unit A4 to obtain an equal part of image block;

multiplying the other equal-part image block by different coefficients to obtain heat influence data of the 4 equal-part image blocks of the peripheral image unit on the 4 equal-part image blocks of the central unit image corresponding to the 4 equal-part image blocks respectively; (as in the computational formula example above);

splicing the 4 equal parts of heat influence data to obtain heat influence data of the peripheral unit image A4 to the central unit image A5;

a second spatial heat influence image is derived based on the heat influence data of the surrounding cell image a4 to the central cell image a 5.

In some embodiments, temporally accumulating the spatial heat impact images, resulting in temporal heat accumulation images, comprises:

constructing a heat gray level lookup table;

when the gray value of the pixel point of the first gray image is smaller than the gray value in the lookup table, subtracting the instantaneous heat value of the pixel point of the space heat influence image of the pixel point of the previous n-1 frame image from the heat accumulated value of the pixel point of the current frame image to obtain the heat accumulated value of the pixel point of the previous n frame image as the time heat accumulated image.

Specifically, the position of a certain pixel point in a first gray image is selected;

according to the currently accumulated heat value of the pixel point, if the currently accumulated heat value of the pixel point cannot be found in the heat/gray level lookup table, the last value smaller than the heat value is found from top to bottom in the first column of the heat/gray level lookup table, and the gray value in the heat/gray level lookup table corresponding to the value is the value to be compared.

For example, the currently accumulated heat value of a certain pixel is 9, the gray value corresponding to 8.7 is 235, and the gray value corresponding to 9.2 is 244 in the heat/gray lookup table.

If the gray value corresponding to the heat value 9 of the pixel point in the current frame first gray image is 248, 248 (the gray value in the current frame heat value 9 first gray image) is greater than 235 (the gray value G corresponding to the lookup table 8.7), the heat is increased.

If the gray value corresponding to the heat value 9 of the pixel point in the first gray image of the current frame is 225, and 225 (the gray value in the first gray image of the heat value 9 of the current frame) is less than 235 (the gray value G corresponding to the lookup table 8.7), the heat is reduced.

If the heat value accumulated at the present time by the pixel point can be found in the heat/gray level lookup table, the gray value in the heat/gray level lookup table corresponding to the value is the value to be compared.

For example, if the gray value corresponding to the heat value of the pixel point in the first gray image of the current frame is 8.7 is 248, and 248 is greater than 235 (the gray value G corresponding to the lookup table 8.7), the heat is increased.

For example, if the gray value corresponding to the heat value of the pixel point in the first gray image of the current frame being 8.7 is 220, 220 is smaller than 235 (the gray value G corresponding to the lookup table 8.7), the heat amount is reduced.

Specifically, a flowchart of the entire control method is shown in fig. 12.

Assuming that the heat before the whole screen is started is accumulated to be 0, constructing an initial heat matrix A _ T0, and assigning values to be 0 (the size of the heat matrix is consistent with the size of the whole screen of the tiled display device);

then, constructing a heat gray level lookup table;

when I is _{2_ij} When G is greater than or equal to G, A _ T _{n_ij} ＝A_T _{n-1_ij} +αI _{4_ij} ；

When I is _{2_ij} If < G, A _ T _{n_ij} ＝A_T _{n-1_ij} -αI _{4_ij} ；

A_T _{n_ij} Pixel point [ ij ] representing previous n frames]The accumulated heat value (i.e., the accumulated heat value accumulates the heat of the previous n frames);

A_T _{n-1_ij} pixel point [ ij ] representing previous n-1 frame]The accumulated heat value (i.e., the accumulated heat value accumulates the heat of the previous n-1 frames);

αI _{4_ij} pixel point [ ij ] representing current frame]The contribution value to heat (i.e. the instantaneous heat value of the pixel point in the current frame);

I _{2_ij} representing a first gray image I ₂ Middle pixel point [ ij ]]The gray value of (which is used to compare with the gray value G in the heat/gray look-up table);

alpha represents the weight coefficient of the contribution value (namely the weight coefficient of the heat accumulated by the pixel point [ ij ] at the position of the ith row and the jth column of the screen of the tiled display device);

g represents the first gray image I to be associated with in the lookup table ₂ Middle pixel point [ ij ]]The gray-scale value of (a) is compared.

In some embodiments, constructing the heat gray level lookup table comprises:

Specifically, all gray scales of 0-255 are periodically tested, and the heat value of the corresponding splicing display device when the gray scale of the image is a gray scale value is obtained;

selecting gray values corresponding to the heat values in the heat value range respectively, and constructing a heat gray look-up table; the calorific value range is not less than 0 and not more than 10.7;

wherein one test cycle comprises;

continuously displaying the same image on the splicing display device, wherein the gray level of the image is a gray level value;

after the same image is displayed for a first time, the heat of the tiled display device is kept at a fixed value, and the heat value of the tiled display device corresponding to the gray level of the image which is a gray level value is tested and obtained.

Specifically, a certain gray level can be selected to light the screen for a long time, and the stable heat value of the screen can be tested.

In the actual test process, after the same image is displayed on the screen of the MiniLED tiled display device for more than 40 minutes, the temperature of the screen is stabilized to a fixed value and does not change any more, and the temperature stabilization value is the heat value after stabilization under the gray scale.

The heat/gray look-up table is constructed by trying and measuring for gray values corresponding to heat values from 0 to 10.7, respectively.

Table one: heat gray level lookup table

The embodiment of the application provides a method for estimating the heat of a MiniLED tiled display device based on a gray value statistics method, the gray value of each pixel point of each frame of image generates a contribution value to the heat accumulation of the current temperature of a screen, and the contribution value can refer to increased or decreased heat. The contribution values are accumulated in the time dimension to form a final screen heat estimate. The heat estimation of the MiniLED tiled display device is carried out by utilizing the scheme of the application, any temperature sensing hardware is not required to be added, and the temperature and heat estimation of the MiniLED tiled display device is realized under the condition of not increasing any cost. A heat accumulated image is formed through the estimated heat estimated value of the MiniLED tiled display device, and then the heat accumulated image is subjected to region segmentation compensation to finally form a compensation image.

The effect diagrams of the control method of the tiled display device provided by the embodiment of the application are shown in fig. 14 and fig. 15.

Based on the same inventive concept, as shown in fig. 13, an embodiment of the present application provides a control device for a tiled display device, including:

the space heat module 10 is configured to acquire a first grayscale image, and determine a space heat influence image of the tiled display device based on the first grayscale image, where the first grayscale image is obtained by performing graying processing on an original image;

the time heat module 20 is used for performing time accumulation on the space heat influence image to obtain a time heat accumulation image;

a second gray scale module 30 for mapping the temporal heat accumulation image to a second gray scale image;

and the compensation module 40 is configured to subtract the second grayscale image from the R channel component in the original image to obtain a compensated image.

The control device of the tiled display device of this embodiment can execute any one of the control methods of the tiled display device provided in the embodiments of the present application, and the implementation principles thereof are similar and will not be described herein again.

Based on the same inventive concept, the embodiment of the application provides a tiled display device, which comprises:

splicing the display panels; the spliced display panel comprises a plurality of display panels spliced with each other;

a memory;

the memory stores a computer program that is executed by the processor to implement the method of controlling a tiled display apparatus as provided in any of the embodiments described above.

Based on the same inventive concept, embodiments of the present application provide a computer-readable storage medium, where the computer-readable storage medium is used to store computer instructions, and when the computer instructions are executed on a computer, the computer can execute the control method of the tiled display device provided in any of the above embodiments.

By applying the embodiment of the application, at least the following beneficial effects can be realized:

Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, various operations, methods, steps, measures, schemes in the various processes, methods, procedures that have been discussed in this application may be alternated, modified, rearranged, decomposed, combined, or eliminated. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

The foregoing is only a few embodiments of the present application and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present application, and that these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A control method of a tiled display device, comprising:

acquiring a first gray image, and determining a space heat influence image of the splicing display device based on the first gray image, wherein the first gray image is obtained by graying an original image;

mapping the temporal heat accumulation image to a second grayscale image;

2. The method of claim 1, wherein determining the spatial heat affected image of the tiled display device based on the first grayscale image in the spatial dimension comprises:

and determining a spatial heat influence image of the tiled display device based on the pattern edge diffusion image.

3. The method for controlling a tiled display device according to claim 2, wherein the simulating heat diffusion information of the pattern in the first gray scale image to generate a pattern edge diffusion image comprises:

reducing a gray value of a first area outside the edge of the pattern in the first gray image, and increasing a gray value of a second area inside the edge of the pattern in the first gray image, wherein the increased gray value is equal to the reduced gray value, so as to obtain a pattern edge diffusion image; or, increasing a gray value to a first region outside the edge of the pattern in the first gray image, and decreasing a gray value to a second region inside the edge of the pattern in the first gray image, where the increased gray value is equal to the decreased gray value, to obtain the pattern edge diffusion image.

4. The control method of the tiled display apparatus according to claim 2, wherein the tiled display apparatus comprises a tiled display panel, the tiled display panel comprising at least two display panels tiled to each other;

and determining a spatial heat affected image of the tiled display device based on the pattern edge diffusion image, comprising:

determining a unit space heat influence image of each unit image;

and determining the space heat influence image of the spliced display panel based on each unit space heat influence image.

5. The method for controlling a tiled display arrangement according to claim 4, wherein said determining the cell-space-heat-affected image for each cell image comprises:

determining heat influence data of the peripheral unit images on the central unit image to obtain a plurality of second space heat influence images; the peripheral unit image is located at the periphery of the central unit image;

and adding the first space heat influence image and the plurality of second space heat influence images to obtain the unit space heat influence image.

6. The method for controlling a tiled display arrangement according to claim 5, wherein said determining the heat impact data of the surrounding unit images on the central unit image to obtain a plurality of second spatial heat impact images comprises:

7. The method according to claim 6, wherein the step of performing a longitudinal segmentation into N equal parts of image blocks and/or a transverse segmentation into N equal parts of image blocks on the peripheral unit image and the central unit image, and determining the thermal influence data of the peripheral unit image on the central unit image to obtain a plurality of second spatial thermal influence images comprises:

the peripheral unit image which is directly adjacent to the central unit image in the transverse direction is a first peripheral unit image, the first peripheral unit image and the central unit image are longitudinally divided into N1 equal parts of image blocks respectively, and heat influence data of the first peripheral unit image on the central unit image are determined to obtain a third heat influence image; the plurality of second spatial heat-affected images comprises a plurality of the third heat-affected images;

a peripheral unit image which is directly vertically adjacent to the central unit image is a third peripheral unit image, the third peripheral unit image and the central unit image are respectively transversely divided into image blocks of equal parts of N2, and heat influence data of the third peripheral unit image on the central unit image are determined to obtain a seventh heat influence image; the plurality of second spatial heat influencing images comprises a plurality of seventh heat influencing images.

8. The method for controlling a tiled display apparatus according to claim 6, wherein the longitudinally dividing the peripheral unit images and the central unit images into N equal parts of image blocks and/or transversely dividing the peripheral unit images and the central unit images into N equal parts of image blocks, determining the thermal influence data of the peripheral unit images on the central unit images to obtain a plurality of second spatial thermal influence images, comprises:

the peripheral unit image which is not directly adjacent to the central unit image is a second peripheral unit image, the second peripheral unit image and the central unit image are longitudinally divided into N1 equal parts of image blocks respectively, longitudinal heat influence data of the second peripheral unit image on the central unit image are determined, and a fourth heat influence image is obtained; transversely dividing the second ambient cell image and the central cell image into N2 equal parts of image blocks respectively, and determining transverse heat influence data of the second ambient cell image on the central cell image to obtain a fifth heat influence image; adding and averaging the fourth and fifth heat-affected images to obtain a sixth heat-affected image; the plurality of second spatial heat influencing images comprises a plurality of the sixth heat influencing image.

9. The method for controlling a tiled display apparatus according to claim 1, wherein the temporally accumulating the spatial heat impact images to obtain temporal heat accumulated images comprises:

constructing a heat gray level lookup table;

when the gray value of the pixel point of the first gray image is larger than or equal to the gray value in the lookup table, adding the heat accumulation value of the pixel point of the previous n-1 frame image with the instantaneous heat value of the pixel point of the space heat influence image of the pixel point of the current frame image to obtain the heat accumulation value of the pixel point of the previous n frame image as the time heat accumulation image;

when the gray value of the pixel point of the first gray image is smaller than the gray value in the lookup table, subtracting the heat accumulated value of the pixel point of the previous n-1 frame image from the instantaneous heat value of the pixel point of the space heat influence image of the pixel point of the current frame image to obtain the heat accumulated value of the pixel point of the previous n frame image as the time heat accumulated image.

10. The method of claim 9, wherein the constructing the heat gray scale lookup table comprises:

determining a corresponding relation between a plurality of gray values and a plurality of stable heat values, wherein the stable heat values are the heat of the splicing display device when the splicing display device continuously displays the image with the same gray value on the full screen for a threshold time;

11. The control method of a tiled display apparatus according to claim 1,

the original image comprises an RGB image.

12. A control apparatus for a tiled display apparatus, comprising:

the space heat module is used for acquiring a first gray level image, and determining a space heat influence image of the splicing display device based on the first gray level image, wherein the first gray level image is obtained by graying an original image;

a second gray scale module to map the temporal heat accumulation image to a second gray scale image;

13. A tiled display apparatus, comprising:

the spliced display panel comprises at least two display panels spliced with each other;

a memory;

the memory stores a computer program for execution by the processor to implement the method of controlling a tiled display arrangement according to any of claims 1-11.

14. A computer-readable storage medium storing computer instructions which, when executed on a computer, cause the computer to perform a method of controlling a tiled display apparatus according to any of the preceding claims 1-11.