Correction method, correction system and related device of LED display box body

Abstract

The invention discloses a correction method and system of an LED display box and a related device.The correction method of the display box comprises the steps that a collection device collects a spliced screen to obtain display image data, and the spliced screen is formed by splicing a plurality of first display boxes; and obtaining a common error feature of the plurality of first display box bodies based on the display image data through the processing equipment, wherein the common error feature is used for correcting the second display box body through the control equipment. By means of the structure, the display uniformity of the display box body can be improved, the multiple display box bodies can be spliced at will, and the splicing freedom degree and the display uniformity of the display box body are improved.

Description

Technical Field

[0001] The present application is applied to the technical field of display correction, and in particular to a correction method, a correction system and related devices for an LED display box. Background Art

[0002] LED (Large Electronic Display) screen is composed of several display boxes (unit display panels or boxes) that can be combined and spliced ​​together, plus a set of appropriate controllers. With the rapid development of LED screens, the demand for LED screens with display boxes that can be spliced ​​arbitrarily is getting higher and higher.

[0003] During the calibration process of the LED display screen, the brightness and chromaticity data of each display box are collected mainly by an imaging acquisition device, and the collected brightness and chromaticity data are compared with the target brightness and chromaticity data of the display box, so as to calibrate each display box based on the difference between the two.

[0004] However, due to the shooting angle defects of the imaging acquisition device, the display image data generated by the imaging acquisition device will have a curved surface error compared with the actual display data of the display screen, which will affect the acquisition accuracy of the brightness and color data, and thus lead to inaccurate correction. Summary of the invention

[0005] The present application provides a correction method, a correction system and related devices for an LED display box to solve the problem of inaccurate correction of the display box.

[0006] To solve the above technical problems, the present application provides a display box correction method, which is applied to a display box correction system. The display box correction system includes a control device, an acquisition device, a processing device and a display box. The control device is connected to the processing device and the display box respectively, and the processing device is also connected to the acquisition device. The display box includes a first display box and a second display box. The method includes: acquiring display image data from a spliced ​​screen through an acquisition device, wherein the spliced ​​screen is spliced ​​by multiple first display boxes, and the display image data includes light point data of the first display box, and the light point data includes brightness data, or also includes chromaticity data; obtaining common error features of multiple first display boxes based on the display image data through a processing device, and the common error features are used to calibrate the second display box through the control device.

[0007] The method of correcting the second display box by controlling the device includes: obtaining initial display information of the second display box by collecting the initial display information of the second display box by collecting the initial display information of the display box correction system; and correcting the second display box by controlling the device based on the common error characteristics and the initial display information.

[0008] The correction method of the LED display cabinet comprises: obtaining 9 first display cabinets, and splicing the 9 first display cabinets to form a spliced ​​screen with length and width dimensions of 3*3 respectively; wherein the unit of the length and width dimensions is the number of first display cabinets; acquiring the spliced ​​screen by an acquisition device to obtain display image data of the spliced ​​screen; acquiring the common error characteristics between the 9 first display cabinets based on the display image data of the spliced ​​screen by a processing device; and correcting the second display cabinet by a control device based on the common error characteristics between the 9 first display cabinets and the initial display information of the second display cabinet.

[0009] The common error feature includes a matrix of error coefficients of multiple display modules of the display box; the initial display information of the second display box is composed of the initial display information of the multiple display modules of the second display box; the second display box is corrected by the control device based on the common error feature and the initial display information, including: performing logical operations on each error coefficient in the matrix and the initial display information of each corresponding display module in the second display box by the processing device, generating corrected display information of each display module, so as to correct the second display box based on the corrected display information by the control device.

[0010] Wherein, in the case where the initial display information is initial display image data, the second display box is corrected based on the common error characteristics and the initial display information by the control device, including: acquiring the initial display image data of the second display box by the acquisition device of the display box correction system; correcting the initial display image data based on the common error characteristics by the processing device to obtain the corrected image data of the second display box; determining the correction coefficient of the second display box based on the corrected image data, so as to correct the second display box based on the correction coefficient by the control device.

[0011] Wherein, in the case where the initial display information is the initial display coefficient, the second display box is corrected based on the common error feature and the initial display information by the control device, including: acquiring the initial display image data of the second display box by the acquisition device of the display box correction system; correcting the second display box based on the initial display image data by the processing device to obtain the initial display coefficient of the second display box; correcting the initial display coefficient based on the common error feature to obtain the correction coefficient of the second display box, so as to correct the second display box based on the correction coefficient by the control device.

[0012] Among them, acquiring display image data from the spliced ​​screen by an acquisition device includes: placing the spliced ​​screen at a preset position in the display box correction system, and acquiring images of the spliced ​​screen at the preset position at a preset temperature by an acquisition device at a fixed position to obtain display image data of the spliced ​​screen; acquiring initial display image data of the second display box by an acquisition device of the display box correction system includes: placing the second display box at a preset position, and acquiring images of the second display box at a preset position at a preset temperature by an acquisition device at a fixed position to obtain initial display image data of the second display box.

[0013] Among them, the splicing screen is acquired by an acquisition device to obtain display image data, including: the display image data of the splicing screen in multiple display states are acquired by the acquisition device respectively; wherein the brightness and / or chromaticity between each display state is different; the common error characteristics of multiple first display boxes are obtained by a processing device based on the display image data, including: the common error characteristics of multiple first display boxes in each display state are obtained by a processing device based on the display image data corresponding to the multiple display states; the second display box is corrected by a control device, including: the initial display information of each display state displayed by the second display box is respectively corrected by the processing device using each common error characteristic, so as to correct the second display box by the control device.

[0014] The common error characteristics of the plurality of first display boxes are obtained based on the display image data by the processing device, including: dividing the display image data of the spliced ​​screen by the processing device to obtain the display image data of each first display box, or obtaining the display image data of each first display box based on the relative position of each first display box in the spliced ​​screen by the processing device; and obtaining the common error characteristics between the display image data of each first display box by statistics.

[0015] Among them, the common error features include common surface features and common thermal features; the common error features between the display image data of each first display box are statistically obtained, including: correspondingly superimposing the brightness data in the display image data of each first display box, and in response to the existence of chromaticity data in the display image data of the first display box, correspondingly superimposing the chromaticity data in the display image data of each first display box to obtain superimposed data; performing data fitting on the superimposed data to determine the gradient gradient data common to each first display box in the superimposed data; and generating the common error features including the common surface features and the common thermal features based on the gradient gradient data.

[0016] Among them, the display image data is obtained by acquiring the spliced ​​screen through the acquisition device, and it also includes: at a first temperature, acquiring the first display image data by the acquisition device on the spliced ​​screen; obtaining the first common error characteristics of multiple first display boxes based on the first display image data by the processing device; and at a second temperature, acquiring the second display image data by the acquisition device on the spliced ​​screen; obtaining the second common error characteristics of multiple first display boxes based on the second display image data by the processing device; wherein the second temperature is greater than the first temperature; statistically obtaining the common error characteristics between the display image data of each first display box, and also includes: obtaining the common surface characteristics based on the first common error characteristics by the processing device, and obtaining the common thermal characteristics based on the difference between the first common error characteristics and the second common error characteristics.

[0017] Among them, the common error characteristics also include edge error characteristics; statistically obtaining the common error characteristics between the display image data of each first display box also includes: determining the edge error characteristics based on the individual edge characteristics of the first display box in the display image data of the spliced ​​screen and the difference between adjacent edge characteristics; and obtaining the common error characteristics by integrating the edge error characteristics, common surface characteristics and common thermal characteristics.

[0018] Among them, the common error characteristics are obtained by integrating the edge error characteristics, common surface characteristics and common thermal characteristics, including: performing discrete value elimination processing on the edge error characteristics, common surface characteristics and common thermal characteristics respectively; and obtaining the common error characteristics by integrating the edge error characteristics after elimination processing, the common surface characteristics after elimination processing and the common thermal characteristics after elimination processing.

[0019] In order to solve the above technical problems, the present invention also provides a display box correction system, which is applied to any of the above-mentioned LED display box correction methods, and the display box correction system includes a control device, an acquisition device, a processing device and a display box, the control device is connected to the processing device and the display box respectively, and the processing device is also connected to the acquisition device, wherein the display box includes a first display box and a second display box; the acquisition device is used to acquire display image data from the spliced ​​screen; wherein the spliced ​​screen is formed by splicing a plurality of first display boxes, and the display image data includes light point data of the first display box, and the light point data includes brightness data, or also includes chromaticity data; the processing device is used to obtain common error characteristics of the plurality of first display boxes based on the display image data; and the control device is used to calibrate the second display box based on the common error characteristics.

[0020] The display box is a spliced ​​screen formed by splicing 9 first display boxes, with a length and width of 3*3 respectively, and the length and width of the spliced ​​screen are 3*3 respectively; wherein the unit of the length and width is the number of first display boxes; the processing device is also used to obtain the common error characteristics of the 9 first display boxes based on the display image data of the spliced ​​screen; the control device is also used to correct the second display box based on the common error characteristics of the 9 first display boxes and the initial display information of the second display box.

[0021] To solve the above technical problems, the present invention further provides an electronic device, which includes: a memory and a processor coupled to each other, and the processor is used to execute program instructions stored in the memory to implement any of the above scene classification methods.

[0022] In order to solve the above technical problems, the present invention further provides a computer-readable storage medium, which stores program data, and the program data can be executed to implement any of the scene classification methods as described above.

[0023] The beneficial effect of the present application is that, different from the prior art, the present application collects display image data of a spliced ​​screen formed by splicing multiple display boxes under a preset environment, and statistically obtains the common error features between the display image data of multiple display boxes based on the display image data of the spliced ​​screen, which can increase the number of statistical data, thereby improving the statistical accuracy of the common error features, and amplifies the difference features between the display image data of each display box, so that the common features between the display image data of each display box can be more accurately determined in the process of statistical common error features, which is conducive to further improving the statistical accuracy of the common error features. Under the preset environment, the common error features are used to calibrate each display box separately, so that the influence of the curved surface error generated by the acquisition device relative to the single second display box can be removed based on the common error features, thereby improving the accuracy of the single second display box calibration, which is conducive to improving the display uniformity of the single second display box, realizing arbitrary splicing between multiple display boxes, improving the splicing freedom and display uniformity of the display panel, and the common error features can be applied to the batch calibration of the single second display box to improve the calibration efficiency of the display box. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of a display cabinet correction system provided by the present application;

[0025] Figure 2 It is a flow chart of an embodiment of a correction method for an LED display box provided by the present application;

[0026] Figure 3 is a flow chart of another embodiment of the display cabinet calibration method provided by the present application;

[0027] Figure 4 A schematic diagram of an implementation method of displaying image data of a spliced ​​screen;

[0028] Figure 5 It is a flow chart of another embodiment of the display cabinet calibration method provided by the present application;

[0029] Figure 6 yes Figure 5 The structural schematic diagram of an implementation scheme of a box correction system is shown in the embodiment;

[0030] Figure 7 It is a schematic diagram of the framework of an embodiment of the electronic device of the present application;

[0031] Figure 8 A schematic diagram of a framework of an embodiment of a computer-readable storage medium of the present application. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] It should be noted that the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship. In addition, "many" in this article means two or more than two. In addition, the term "at least one" in this article means any combination of at least two of any one or more of a plurality of, for example, including at least one of A, B, and C, can mean including any one or more elements selected from the set consisting of A, B and C.

[0034] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0035] See also Figure 1 , Figure 1The display cabinet correction system of this embodiment is applied to the correction method of the LED display cabinet of any of the following embodiments.

[0036] The display cabinet correction system 10 specifically includes a control device 13 , a collection device 12 , a processing device 11 and a display cabinet 14 . The control device 13 is connected to the processing device 11 and the display cabinet 14 respectively, and the processing device 11 is also connected to the collection device 12 .

[0037] The acquisition device 12 is used to acquire the light point data of the display box 14 and generate corresponding display image data. The acquisition device 12 specifically includes any type of imaging device, such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS), etc. The processing device 11 is used to process the display image data to generate a common error feature. The processing device 11 can be a computer device, a cloud server, an intelligent acquisition device (an acquisition device with computing capabilities), and other terminals with computing capabilities, but this application is not limited thereto; the control device 13 is used to control the display of the display screen and calibrate the display box 14 based on the common error features. The control device 13 can be a microcontroller, a programmable logic controller (PLC), a numerical control controller (CNC), a sending device, a sending card, and other devices with display screen control, etc. The specific types of the above devices are not limited here.

[0038] The display cabinet 14 is a splicing unit of the LED display screen. A plurality of display cabinets 14 are spliced ​​to form an LED display screen. In this embodiment, the display cabinet 14 of the display cabinet correction system 10 may include a first display cabinet and a second display cabinet, wherein the first display cabinet is a sample cabinet for statistically generating a common error feature, and the second display cabinet is a display cabinet that needs to be corrected. The first display cabinet and the second display cabinet may be display cabinets of the same batch or different batches, and the first display cabinet and the second display cabinet may be display cabinets with the same width and height or display cabinets with different width and height.

[0039] The display cabinet calibration system of this embodiment is used to implement a calibration method for an LED display cabinet.

[0040] Please read further Figure 2 , Figure 2 1 is a flow chart of an embodiment of a correction method for an LED display box provided by the present application. This embodiment will illustrate the correction method for an LED display box in combination with a display box correction system 10. The specific steps of this embodiment are as follows:

[0041] Step S11: acquiring display image data from the spliced ​​screen through an acquisition device, wherein the spliced ​​screen is formed by splicing a plurality of first display boxes, and the display image data includes light point data of the first display boxes, and the light point data includes brightness data, or also includes chromaticity data.

[0042] Specifically, a plurality of first display cabinets may be first obtained, and the plurality of first display cabinets may be spliced ​​together to form a spliced ​​screen, wherein adjacent first display cabinets in the spliced ​​screen are arranged in close proximity; subsequently, the display image data of the spliced ​​screen may be acquired by the acquisition device 12 of the display cabinet calibration system 10. The number of first display cabinets in the spliced ​​screen is not limited here, and may include but is not limited to 2, 4, 6, 7, 9, 10, 20, and the like.

[0043] The display image data includes the light point data of the first display box, and the light point data includes brightness data, or also includes chromaticity data; that is, when the first display box displays, at least brightness needs to be displayed, and based on the brightness, chromaticity can be displayed according to actual needs.

[0044] The display image data is obtained by imaging by the acquisition device 12. There is a surface error between the specific image data presented and the actual display data of the corresponding spliced ​​screen. The surface error is caused by the difference between the facing area and the non-facing area when the acquisition device 12 is shooting. In terms of morphology, it generally presents a trend of low-frequency gradual transition of light and dark. When each display box is imaged by the acquisition device 12, a surface error will be generated due to the imaging defects of the acquisition device 12. In this embodiment, the spliced ​​screen formed by splicing multiple first display boxes is simultaneously photographed by the display box correction system 10, which will cause the display image data to contain a common surface error generated by each first display box relative to the acquisition device 12. This embodiment corrects the common surface error.

[0045] Step S12: obtaining common error features of a plurality of first display cabinets based on the display image data by a processing device, and the common error features are used to correct the second display cabinets by a control device.

[0046] The common error characteristics of multiple first display boxes are counted based on the display image data of the spliced ​​screen. That is, the common error characteristics of this embodiment represent the unified surface error characteristics between the first display boxes. In a specific application scenario, the common error characteristics can be obtained by statistically analyzing multiple common gradient gradient data in the display image data of the spliced ​​screen and fitting the data. In a specific application scenario, the common error characteristics of each first display box in the display image data of the spliced ​​screen can also be found out through model reasoning using a trained deep learning model. The specific method for determining the common error characteristics is not limited here.

[0047] The common error feature is used to calibrate the second display cabinet through the control device 13. The first display cabinet and the second display cabinet can be display cabinets of the same batch or different batches. Since the surface error is the error generated by the display cabinet relative to the acquisition device 12, it is an environmental error rather than a structural error of the display cabinet. Therefore, the common error feature can be applied to display cabinets of the same batch with the same structure as the first display cabinet, and can also be applied to display cabinets of different batches with different structures from the first display cabinet.

[0048] During the calibration in this step, the second display box can be calibrated separately. During the calibration process, it is necessary to eliminate the surface error generated by the acquisition device 12 relative to the single second display box, and the surface error generated by the acquisition device 12 relative to the single second display box has been obtained through the aforementioned common error characteristics. Therefore, during the calibration process of the single second display box, the influence of the surface error generated by the acquisition device 12 relative to the single second display box can be removed based on the common error characteristics, thereby improving the accuracy of the separate calibration of the single second display box, which is beneficial to improving the display uniformity of the single second display box after calibration, facilitating the arbitrary splicing of multiple calibrated second display boxes, and improving the display uniformity of the LED display screen spliced ​​by multiple calibrated second display boxes.

[0049] Through the above steps, the display cabinet correction method of the present embodiment is applied by a display cabinet correction system including a control device, an acquisition device, a processing device and a display cabinet. Specifically, the spliced ​​screen is acquired by the acquisition device to obtain display image data, wherein the spliced ​​screen is spliced ​​by multiple first display cabinets, and the common error characteristics of the multiple first display cabinets are obtained based on the display image data by the processing device. The statistical accuracy of the common error characteristics can be improved by increasing the number of statistical data, and the difference characteristics between the display image data of each display cabinet are amplified, so that the common characteristics between the display image data of each display cabinet can be more accurately located in the process of counting the common error characteristics, which is conducive to further improving the statistical accuracy of the common error characteristics. The common error feature is used to calibrate the second display box through the control device, so that the influence of the surface error generated by the acquisition device relative to the single second display box can be removed based on the common error feature, thereby improving the accuracy of the single second display box calibration, which is beneficial to improving the display uniformity of the single second display box, realizing arbitrary splicing between multiple display boxes, improving the splicing freedom and display uniformity of the LED display screen, and the common error feature can be applied to the batch calibration of the single second display box to improve the calibration efficiency of the display box. Among them, since the common error feature is determined by counting the common surface errors of multiple first display boxes relative to the acquisition device, the common error feature can be used to eliminate the common surface errors of the display boxes of the same batch or different batches relative to the acquisition device, thereby improving the versatility of the common error feature, increasing the scope of application, and realizing the calibration of different display boxes.

[0050] In other embodiments, the correction method of the LED display cabinet can also correct two second display cabinets spliced ​​together at the same time, specifically, the processing device 11 obtains the common error characteristics of each two spliced ​​first display cabinets based on the display image data, and the common error characteristics are used to correct the two second display cabinets spliced ​​together through the control device 13. By correcting the second display cabinets in pairs, the correction speed of the second display cabinets is accelerated, and the correction efficiency of the LED display cabinet is improved. In other embodiments, the number of second display cabinets that are corrected simultaneously can also be other numbers, which are specifically set based on actual needs.

[0051] See also Figure 3 , Figure 3 1 is a flow chart of another embodiment of the display cabinet calibration method provided by the present application. This embodiment will illustrate the LED display cabinet calibration method in combination with the display cabinet calibration system 10. The specific steps of this embodiment are as follows:

[0052] Step S21: acquiring display image data from the spliced ​​screen through an acquisition device.

[0053] Multiple display cabinets are spliced ​​together to form a spliced ​​screen. The size range of the spliced ​​screen is M*N (M>1, N>1, and M and N are both positive integers), that is, the minimum size of the spliced ​​screen is 1*2, and the maximum size is not limited, and the unit is the display cabinet.

[0054] In a specific application scenario, a 3*3 spliced ​​screen can be obtained by splicing 9 display cabinets. In a specific application scenario, a 2*3 spliced ​​screen can also be obtained by splicing 6 display cabinets. The number of display cabinets in the spliced ​​screen is set based on actual needs and is not limited here.

[0055] In a specific application scenario, the spliced ​​screen can be placed at a preset position in the display cabinet correction system, and the acquisition device 12 at a fixed position can acquire images of the spliced ​​screen at the preset position at a preset temperature to obtain display image data of the spliced ​​screen.

[0056] The preset position is a fixed position in the darkroom where the display box correction system 10 is located to prevent interference from other light sources and improve the acquisition accuracy of the display image data of the display box. The spliced ​​screen is placed at the preset position, and the position of the acquisition device 12 is fixed, that is, the acquisition angle of the acquisition device 12 is fixed, so that the surface error generated by the acquisition device 12 relative to the display device at the preset position is also fixed.

[0057] The preset temperature range may be 15-80 degrees Celsius, or 0-15 degrees Celsius. The specific selection may be based on actual needs. In this embodiment, a single temperature may be selected for single calibration, or multiple temperatures may be selected for multiple calibrations.

[0058] In this step, the image data of the spliced ​​screen is acquired by the acquisition device 12 at a fixed position at a preset temperature. That is, the acquisition environment of the spliced ​​screen is controlled by the preset temperature, the preset position and the fixed position of the acquisition device 12 to reduce the influence of environmental factors on the displayed image data.

[0059] See also Figure 4 , Figure 4 A schematic diagram of an implementation of displaying image data on a spliced ​​screen.

[0060] The figure shows the display image data of the 2*2 spliced ​​screen. The image contains the common error features in each first display box.

[0061] In a specific application scenario, the display image data of the spliced ​​screen in multiple display states can be collected by the acquisition device 12; wherein the brightness and / or chromaticity between each display state is different. Chromaticity may include one or more of white, red, green and blue. Brightness may include any grayscale value greater than 0, for example: 10, 40, 60, 80, 90, 110, 150, 180, 200, 225, etc., which are not specifically limited here. The number of multiple display states and the specific brightness and / or chromaticity are set based on actual needs and are not limited here.

[0062] In a specific application scenario, the multiple display states include a first display state, a second display state, and a third display state, wherein the chromaticity of the first display state is red and the brightness is 50 grayscales, the chromaticity of the second display state is green and the brightness is 100 grayscales, and the chromaticity of the third display state is blue and the brightness is 150 grayscales. Then, each first display box in the spliced ​​screen can first display the first display state, and the display image data when the spliced ​​screen displays the first display state can be collected by the acquisition device 12; then, each first display box in the spliced ​​screen can display the second display state, and the display image data when the spliced ​​screen displays the second display state can be collected by the acquisition device 12; finally, each first display box in the spliced ​​screen can display the third display state, and the display image data when the spliced ​​screen displays the third display state can be collected by the acquisition device 12. The separate collection of display image data of the spliced ​​screen in different display states is not limited to this.

[0063] Among them, displaying the display image data in multiple display states by splicing the screen is used to obtain the common error characteristics of the first display box in different display states, so that the common error characteristics in different display states are respectively used for the correction of the second display box in the corresponding display state, that is, one-to-one correction. However, in some embodiments, when there are different target display states with the same chromaticity but different brightness, the common error characteristics of different target display states can also be used for mutual correction. In a specific application scenario, if the fourth display state is red and the brightness is 50 grayscale; the fifth display state is red and the brightness is 80 grayscale, during correction, the common error characteristics of the fourth display state can also be used to correct the second display box in the fourth display state or the fifth display state, and the common error characteristics of the fifth display state can be used to correct the second display box in the fourth display state or the fifth display state; that is, the common error characteristics of the display state under the same chromaticity can correct the second display box in other display states under the same chromaticity, which can improve the correction efficiency.

[0064] Step S22: The display image data of the spliced ​​screen is divided by a processing device to obtain the display image data of each first display box, or the display image data of each first display box is obtained by a processing device based on the relative position of each first display box in the spliced ​​screen.

[0065] After the display image data of the spliced ​​screen is acquired, the display image data of each first display box is acquired based on the display image data of the spliced ​​screen by the processing device 11 .

[0066] In a specific application scenario, the display image data of the spliced ​​screen can be divided by the processing device 11 to obtain the display image data of each first display box. For example, if the spliced ​​screen is a 3*3 spliced ​​screen composed of 9 display boxes, the display image data of the spliced ​​screen is directly divided into display image data of 9 display boxes according to the corresponding areas.

[0067] In a specific application scenario, the display image data of each first display box can also be obtained by the processing device 11 based on the relative position of each first display box in the spliced ​​screen. For example, if the spliced ​​screen is a 2*3 spliced ​​screen composed of 6 display boxes, the display image data of the 6 display boxes are obtained from the display image data of the spliced ​​screen according to the relative positions of the 6 first display boxes in the spliced ​​screen. That is, no division is performed, and the extraction is performed directly based on the area range.

[0068] Step S23: obtaining common error features between the display image data of each first display cabinet by means of statistics of the processing device.

[0069] Statistics are performed based on the display image data of each first display cabinet to obtain a common error feature between the display image data of the plurality of first display cabinets.

[0070] In a specific application scenario, the common error characteristics of the multiple first display boxes in each display state can be obtained by the processing device 11 based on the display image data corresponding to the multiple display states; for example: when the multiple display states include the first display state, the second display state and the third display state, the common error characteristics of the multiple first display boxes in the first display state can be obtained by the processing device 11 based on the display image data of the splicing screen corresponding to the first display state; the common error characteristics of the multiple first display boxes in the second display state can be obtained by the processing device 11 based on the display image data of the splicing screen corresponding to the second display state; and the common error characteristics of the multiple first display boxes in the third display state can be obtained by the processing device 11 based on the display image data of the splicing screen corresponding to the third display state; that is, P common error characteristics are obtained corresponding to P display states, and P is a positive integer.

[0071] The specific processing steps for obtaining the common error characteristics of multiple first display cabinets based on the display image data are as follows:

[0072] In a specific application scenario, common error features may include common surface features and common thermal features; wherein, common surface features and common thermal features are both reflected in the display image data as a kind of gradient gradual change data, so the two can be determined together, wherein the common thermal feature is the display impact caused by the ambient temperature on the display box, which is also a gradient gradual change data.

[0073] Acquiring the common error characteristics between the display image data of the multiple display boxes includes: superimposing the display image data of the multiple display boxes in the display image data of the spliced ​​screen to obtain superimposed data; specifically, superimposing the brightness data in the display image data of each first display box correspondingly through the processing device 11, and in response to the presence of chromaticity data in the display image data of the first display box, superimposing the chromaticity data in the display image data of each first display box correspondingly to obtain superimposed data. That is, when superimposing the data, at least the brightness data is superimposed correspondingly, but if there is chromaticity data in the display image data of the first display box, the chromaticity data is also superimposed correspondingly to obtain the superimposed data.

[0074] The superimposed data is fitted to determine the common gradient data in each display box in the superimposed data; and a common error feature is generated based on the gradient data. The common error feature includes a common surface feature and a common thermal feature. The data fitting may include establishing a data model based on the superimposed data to calculate the gradient data in the superimposed data.

[0075] By superimposing the display image data of multiple display boxes to obtain superimposed data, the common features between the display image data of the multiple display boxes can be amplified by superimposition, thereby facilitating data fitting to obtain accurate common error features.

[0076] This application scenario is suitable for the scene of hot screen acquisition. Among them, the display image data of the spliced ​​screen can also be collected by cold screen, so as to remove the influence of temperature on the display box. Through the above method, only the common surface features are obtained by data fitting. The above two methods can be combined to distinguish the common surface features and the common thermal features. The selection of specific methods can be determined based on actual needs. In a specific application scenario, the spliced ​​screen can be collected by the acquisition device 12 at a first temperature to obtain the first display image data; the first common error features of multiple first display boxes are obtained by the processing device 11 based on the first display image data, wherein the first temperature is a scene of cold screen acquisition, and the image acquisition is performed at a temperature close to room temperature, which can be 15-30 degrees Celsius or 30-40 degrees Celsius, and the present application is not limited to this. That is, when the first display image data is collected at the first temperature, the temperature is a cold screen at this time, so the heat will not affect the spliced ​​screen, so that the gradient gradient data on the second display image data at this time only contains the common surface error, not the common thermal error. That is, a separate common surface feature can be obtained by the processing device 11 based on the first common error feature.

[0077] Subsequently, at the second temperature, the spliced ​​screen is collected by the acquisition device 12 to obtain the second display image data; the second common error characteristics of the multiple first display boxes are obtained based on the second display image data by the processing device 11; wherein the second temperature is greater than the first temperature. The second temperature is for thermal screen collection, which can be 30-80 degrees Celsius, or 0-30 degrees Celsius, and the present application is not limited thereto. Thermal influence is introduced to the spliced ​​screen by heating, so that the second display image data of the spliced ​​screen contains both common surface errors and common thermal errors. Therefore, a separate common thermal characteristic can be obtained based on the difference between the first common error characteristic and the second common error characteristic.

[0078] In a specific application scenario, the preset temperature may also be the working environment temperature of the display box, that is, the common error feature determination, correction and display box working temperature are the same. At this time, the thermal factors have the same impact on the display box in the three scenarios, so the common thermal features can be ignored. Only the common surface features can be determined to achieve correction of the display box and improve the display uniformity of the display box.

[0079] When the acquisition device 12 acquires the display image data of the spliced ​​screen, there will be two kinds of gradient data. One is the first gradient data generated by the acquisition device 12 relative to the size of the entire spliced ​​screen. The first gradient data is the surface error generated by the regional angle difference of the entire spliced ​​screen relative to the acquisition device 12; the second gradient data is the surface error generated by the regional angle difference of the first display box relative to the acquisition device 12. Both kinds of surface errors are caused by the imaging defects of the acquisition device 12. The difference between the two kinds of surface errors is caused by the size difference between different display objects. The surface error and the thermal error are the same. In the present embodiment, a single second display box is finally corrected separately. Therefore, it is only necessary to determine the common second gradient data of each display box, and the first gradient data is ignored. Specifically, since the first gradient data of the spliced ​​screen is different on each first display box, it is only necessary to statistically calculate the same common regular features of each display box in the superimposed data to obtain the second gradient data and generate a common error feature.

[0080] In a specific application scenario, the common error feature may also include an edge error feature. Since the present embodiment performs calibration on a single second display cabinet, the edge is not affected by the brightness of the surrounding display cabinets, and the display cabinet is spliced ​​with other display cabinets for display during operation, so there will be edge errors.

[0081] The common error features between the display image data of the multiple display boxes are obtained, and the method further includes: determining the edge error features based on the difference between the individual edge features of the display boxes and the adjacent edge features in the display image data of the spliced ​​screen. The individual edge features refer to the features of the edges that are not adjacent to other display boxes, and the adjacent edge features refer to the features of the edges that are adjacent to other display boxes. In this scenario, the common error features are obtained by integrating the edge error features, the common curved surface features, and the common thermal features. That is, the common error features of this embodiment can simultaneously include three types of errors, namely, the edge error features, the common curved surface features, and the common thermal features.

[0082] Among them, in order to further improve the accuracy of common error features, discrete value elimination processing can be performed on edge error features, common surface features and common thermal features respectively; for example, assuming that most of the parameter values ​​of a certain error feature are in the range of 10 to 50, but there are sporadic parameter values ​​that reach 100, then the sporadic parameter values ​​are deleted, and subsequent processing is only based on parameter values ​​in the range of 10 to 50.

[0083] Subsequently, based on the edge error features after elimination, the common surface features after elimination, and the common thermal features after elimination, the common error features are obtained to reduce the influence of discrete outliers on the common error features. The three error features in the common error features can be separated from each other and then corrected separately, or they can be merged into one and then corrected as a whole. The specific setting is based on actual needs and is not limited.

[0084] This embodiment obtains a common error feature that can be applied to a single second display cabinet by splicing a small number of first display cabinets, and can apply the common error feature to a batch correction process of display cabinets, thereby improving the correction efficiency and accuracy of the display cabinets.

[0085] In a specific application scenario, the common error feature may specifically include a matrix of error coefficients of multiple display modules of a display box, and a matrix of error coefficients generated for a display module corresponding to each pixel of the display box, which is then applied to a correction process to correct the initial display information of the second display box.

[0086] Step S24: acquiring initial display information of the second display box through acquisition equipment of the display box calibration system.

[0087] The second display box can be placed at a preset position of the display box correction system 10, and the image of the second display box at the preset position is collected by the fixed position collection device 12 at a preset temperature to obtain the initial display image data of the second display box. By limiting the display box correction system 10, the preset position, the preset temperature and the fixed position collection device 12 during collection, it is ensured that the collection environment of the spliced ​​screen is the same as the collection environment of the second display box, thereby reducing the interference of the external environment on the collected data and improving the accuracy of the entire correction method.

[0088] The initial display information may be display data before correction or display data after correction. Specifically, in a specific application scenario, if the initial display information is initial display image data, i.e., display data before correction, the initial display image data of the second display box may be directly collected by the acquisition device 12 of the display box correction system 10. In a specific application scenario, if the initial display information is initial display coefficients, i.e., display data after correction, the initial display image data of the second display box may be collected by the acquisition device 12 of the display box correction system 10; the second display box may be corrected by the processing device 11 based on the initial display image data to obtain the initial display coefficient of the second display box.

[0089] In a specific application scenario, when the aforementioned common error characteristics include common error characteristics of multiple display states, this step can also collect the initial display information of the second display box in multiple display states respectively. For example: if the aforementioned common error characteristics include common error characteristics of the first display state, common error characteristics of the second display state, and common error characteristics of the third display state, this step collects the initial display coefficient of the second display box in the first display state, the initial display coefficient in the second display state, and the initial display coefficient in the third display state respectively, so as to perform corresponding collection, so as to facilitate the subsequent one-to-one corresponding correction.

[0090] Step S25: calibrating the second display cabinet based on the common error feature and the initial display information by the control device.

[0091] Based on the common error characteristics, the surface error, edge error and thermal error in the initial display image data are eliminated, so that the corrected image data can more realistically reflect the actual brightness and chromaticity data of the display cabinet, thereby improving the correction accuracy of the display cabinet.

[0092] In a specific application scenario, the processing device 11 can use each common error feature to respectively perform corresponding corrections on the initial display information of each display state displayed by the second display box, so as to perform correction of the second display box by the control device 13. If the aforementioned common error feature includes the common error feature of the first display state, the common error feature of the second display state, and the common error feature of the third display state, this step respectively uses the common error feature of the first display state to respectively perform corresponding corrections on the initial display information when the second display box displays the first display state, uses the common error feature of the second display state to respectively perform corresponding corrections on the initial display information when the second display box displays the second display state, and uses the common error feature of the third display state to respectively perform corresponding corrections on the initial display information when the second display box displays the third display state. The correction methods under multiple display states are similar and will not be described in detail. Among them, the first display state, the second display state, and the third display state of this embodiment are only used as examples and are not limited in any way.

[0093] The common error feature includes a matrix of error coefficients of multiple display modules of the display box; the initial display information of the second display box is composed of the initial display information of multiple display modules of the second display box; when correcting the initial display image data, the processing device 11 performs a logical operation on each error coefficient in the matrix and the initial display information of each corresponding display module in the second display box to generate corrected display information of each display module, so as to correct the second display box based on the corrected display information. The logical operation includes but is not limited to a multiplication operation or an addition operation.

[0094] Specifically, the processing device 11 multiplies or adds each error coefficient in the matrix with the initial display information of each corresponding display module in the second display box one by one to generate corrected display information of each display module, so that the control device 13 corrects the second display box based on the corrected display information.

[0095] In a specific application scenario, assuming that the display box is composed of 10 display modules * 10 display modules, the common error feature may include a first matrix of 10 * 10 error coefficients, each error coefficient corresponding to a display module. The initial display information of the second display box is also a second matrix of 10 * 10 initial display information. The 100 error coefficients in the first matrix are multiplied one-to-one with the 100 initial display information in the second matrix to obtain a 10 * 10 third matrix composed of the corrected display information of the 100 display modules. The above is for example only and is not limited.

[0096] In a specific application scenario, assuming that the display box is composed of 8 display modules * 7 display modules, the common error feature may include a third matrix of 8 * 7 error coefficients, each error coefficient corresponding to a display module. The initial display information of the second display box is also a fourth matrix of 8 * 7 initial display information. The 56 error coefficients in the third matrix are added one by one to the 56 initial display information in the fourth matrix to obtain a third matrix of 8 * 7 composed of the corrected display information of the 56 display modules. The above is only an example and is not limited. Among them, whether the common error feature is selected for multiplication or addition in the application of the initial display information is selected based on actual needs and the expression form of the common error feature, and is not limited here. For example: if the expression form of the common error feature is an error coefficient, a combination of multiplication or addition can be adopted; if the expression form of the common error feature is a specific characteristic parameter value, an addition combination can be adopted.

[0097] This embodiment can uniformly correct the initial display information of a single second display cabinet based on the common error feature, and then apply the common error feature to the batch correction process of the display cabinets, thereby improving the correction efficiency and accuracy of the display cabinets.

[0098] In a specific application scenario, when the initial display information is the initial display image data, in this step, the processing device 11 corrects the initial display image data based on the common error characteristics to obtain the corrected image data of the second display box; then the correction coefficient of the second display box is determined based on the corrected image data, so that the second display box is corrected based on the correction coefficient by the control device 13. That is, in this application scenario, the initial display image data of the second display box is corrected by the common error characteristics to eliminate the error in the initial display image data of the second display box and improve the correction accuracy. Among them, when correcting the initial display image data of the second display box by the common error characteristics, it is also calculated by performing logical operations on the corresponding parameters in the matrix, which is the same as the above and will not be repeated.

[0099] In a specific application scenario, when the initial display information is the initial display coefficient, in this embodiment, the acquisition device 12 of the display box correction system 10 acquires the initial display image data of the second display box; the processing device 11 corrects the second display box based on the initial display image data to obtain the initial display coefficient of the second display box; the initial display coefficient is corrected based on the common error feature to obtain the correction coefficient of the second display box, so as to correct the second display box based on the correction coefficient through the control device 13. That is, in this application scenario, the initial display coefficient of the second display box is corrected by the common error feature to eliminate the error in the initial display coefficient of the second display box and improve the correction accuracy. Among them, when the initial display coefficient of the second display box is corrected by the common error feature, it is also calculated by performing logical operations on the corresponding parameters in the matrix, which is the same as the above and will not be repeated.

[0100] The calibrated second display box eliminates the influence of curved surface error, thermal error and edge error on the image display data, so that it is convenient to calibrate through display information that can accurately reflect the actual lamp point data of the second display box, and accurately find the difference between the actual lamp point data of the second display box and the display standard, so that the second display box can be accurately calibrated by using the difference, thereby improving the calibration accuracy of the second display box.

[0101] Through the above steps, the present embodiment is applied by a display cabinet correction system including a control device, an acquisition device, a processing device and a display cabinet. Specifically, the number of statistical data is increased by using the setting of a spliced ​​screen of multiple first display cabinets, thereby improving the statistical accuracy of the common error feature, and the difference features between the display image data of each display cabinet are amplified, so that the common features between the display image data of each display cabinet can be more accurately determined in the process of counting the common error features, which is conducive to further improving the statistical accuracy of the common surface error and the common thermal error. In addition, the present embodiment determines the edge error feature based on the difference between the individual edge features of the display cabinet in the display image data of the spliced ​​screen and the adjacent edge features, which can eliminate the problem of low edge darkness caused by the absence of adjacent display cabinets when calibrating a single second display cabinet, improve the correction effect of the common error feature on the display cabinet, and improve the display uniformity of the display cabinet after correction. In addition, the correction environment of the present embodiment is the same as the collection environment when collecting and counting the common error features, and both are preset environments, so that the interference of environmental factors on the collection process and the correction process can be avoided, and the statistical accuracy of the common error feature and the accuracy of the display cabinet correction can be improved.

[0102] In a specific application scenario, the specific implementation of the LED display cabinet correction method can be as follows:

[0103] The acquisition device 12 first acquires the brightness and chromaticity values ​​of each lamp point of the M*N spliced ​​screen to obtain the display image data of the spliced ​​screen. The units of M and N are the number of first display cabinets. Assuming that the lamp point resolution of a single first display cabinet is Sm*Sn, the display image data includes the brightness and chromaticity values ​​of M*Sm*N*Sn lamp points.

[0104] Subsequently, the first gradient gradient data and edge problems of the display image data of the spliced ​​screen itself can be removed. Specifically, the first gradient gradient data has a smooth transition on the display image data, and the range occupied is based on the entire spliced ​​screen. The display image data of the spliced ​​screen can be directly calculated by the processing device 11 using two-dimensional surface fitting to obtain the first gradient gradient data, and the first gradient gradient data can be removed on the basis of the display image data, so that the remaining display image data only contains the second gradient gradient data of each first display box. The individual edge features and adjacent edge features of the spliced ​​screen should be consistent in theory, so the difference ratio between the individual edge features and the adjacent edge features is calculated, and the individual edge features can be compensated by the difference ratio so that the corresponding display image data is consistent with the display image data of the adjacent edge features. Among them, the range of edge compensation can be the display module of the edge 2 rows and / or columns of the display box.

[0105] The display image data of each first display unit is obtained based on the display image data of the spliced ​​screen after removing the first gradient gradual change data. Specifically, the brightness and chromaticity values ​​of M*Sm*N*Sn lamp points in the display image data of the spliced ​​screen are split into brightness and chromaticity data of M*N first display units according to the first display unit through the processing device 11, each group contains Sm*Sn values, and the display image data of M*N first display units are obtained.

[0106] The display image data of the M*N first display units are superimposed by the processing device 11. Specifically, the M*N groups of data are added point by point according to the corresponding positions of the light points and the mean is calculated to obtain a final group of superimposed data of size Sm*Sn. The superimposed data can be subjected to discrete value elimination processing, wherein the interference of discrete abnormal values ​​can be removed according to a certain proportion. The certain proportion can be 1%-5%, such as 1%, 2%, 3%, 4% or 5%, etc., which is set based on actual needs.

[0107] When the common error characteristics of each first display box are counted by the processing device 11, the common surface error and common thermal error of a single display box are obtained by performing two-dimensional surface fitting on the superimposed data. At this time, the common surface error and common thermal error can be characterized by the same second gradient gradient data; and the difference between the edge and the internal light point in the superimposed data is calculated to obtain the edge error characteristics of a single display box. The gradient gradient data including the common surface error and the common thermal error can be saved separately from the edge error characteristics, and then separately corrected. The gradient gradient data including the common surface error and the common thermal error can also be fused with the edge error characteristics to obtain the common error characteristics of the comprehensive edge error characteristics, the common surface characteristics and the common thermal characteristics. The fusion method includes but is not limited to logical operations between corresponding coefficients in the matrix or corresponding fusion based on a trained deep learning model.

[0108] The size of the coefficient matrix of the fused common error features is Sm*Sn, which is the same as the size of the light point matrix of a single box, so it is easy to correct one-to-one.

[0109] The initial display information of a single second display box is collected by the collection device 12. Before the initial display information is corrected, the common error characteristics of Sm*Sn are logically operated with the display information of each lamp point in the initial display information in a one-to-one correspondence through the processing device 11, so that the display information of each lamp point in the initial display information is corrected one by one. The corrected display information can remove the influence of the surface, thermal and edge errors, and accurately reflect the real lamp point data of the second display box. Therefore, the single second display box is corrected based on the corrected display information by the control device 13, which can improve the correction accuracy of the single second display box, greatly improve the display uniformity, facilitate the arbitrary splicing of the corrected second display boxes to obtain an LED display screen, and improve the display uniformity of the LED display screen.

[0110] See also Figure 5-6 , Figure 5 It is a flow chart of another embodiment of the display cabinet calibration method provided by the present application. Figure 6 yes Figure 5 The embodiment shows a schematic structural diagram of an implementation scheme of a cabinet calibration system.

[0111] The display cabinet correction system 600 specifically includes a control device 63, a collection device 62, a processing device 64 and a splicing screen 60. The control device 63 is connected to the processing device 64 and the splicing screen 60 respectively, and the processing device 64 is also connected to the collection device 62. The specific steps of the display cabinet correction method of this embodiment are as follows:

[0112] Step S31: 9 first display cabinets are obtained, and the 9 first display cabinets are spliced ​​together to form a spliced ​​screen with a length and width of 3*3 respectively.

[0113] The units of length and width are the number of first display boxes, and each row and column of the spliced ​​screen 60 is formed by splicing three first display boxes.

[0114] See also Figure 6 The spliced ​​screen 60 of this embodiment is formed by splicing 9 first display boxes 61, and the length and width dimensions are 3*3 respectively, and the unit of the length and width dimensions is the number of the first display boxes.

[0115] Among them, the above-mentioned spliced ​​screen 60 can increase a sufficient number of first display boxes 61 to increase the number of samples to improve the accuracy of the common error characteristics between the first display boxes 61, and can also avoid the situation where the statistical calculation amount of the common error characteristics is too large, resulting in a decrease in the efficiency of the entire correction method. That is, the spliced ​​screen 60 of this embodiment can not only improve the accuracy of the common error characteristics and the accuracy of subsequent corrections, but also reduce resource waste to a certain extent and ensure correction efficiency.

[0116] Step S32: acquiring display image data of the spliced ​​screen by acquiring the spliced ​​screen through an acquisition device.

[0117] The specific steps of this embodiment are the same as step S21 of the aforementioned embodiment. Please refer to the above text and will not be repeated here.

[0118] Step S33: obtaining the common error characteristics among the nine first display cabinets based on the display image data of the spliced ​​screen through a processing device.

[0119] The display image data of the spliced ​​screen is divided by the processing device 64 to obtain the display image data of the 9 first display boxes, or the display image data of the 9 first display boxes are obtained by the processing device 64 based on the relative positions of the 9 first display boxes in the spliced ​​screen.

[0120] The common error features among the nine first display cabinets are counted, wherein the specific method for counting the common error features is the same as that in step S23 of the aforementioned embodiment, and please refer to the foregoing text and will not be described in detail.

[0121] Step S34: calibrating the second display cabinet based on the common error characteristics among the nine first display cabinets and the initial display information of the second display cabinet by the control device.

[0122] In a specific application scenario, when the initial display information is the initial display image data, in this step, the processing device 64 corrects the initial display image data based on the common error characteristics among the nine first display cabinets to obtain the corrected image data of the second display cabinet; then the correction coefficient of the second display cabinet is determined based on the corrected image data, so that the second display cabinet is corrected based on the correction coefficient by the control device 63. That is, in this application scenario, the initial display image data of the second display cabinet is corrected by the common error characteristics to eliminate the error in the initial display image data of the second display cabinet and improve the correction accuracy.

[0123] In a specific application scenario, when the initial display information is the initial display coefficient, in this embodiment, the acquisition device 62 of the display cabinet correction system acquires the initial display image data of the second display cabinet; the processing device 64 corrects the second display cabinet based on the initial display image data to obtain the initial display coefficient of the second display cabinet; the initial display coefficient is corrected based on the common error characteristics among the 9 first display cabinets to obtain the correction coefficient of the second display cabinet, and the second display cabinet is corrected based on the correction coefficient by the control device 63. That is, in this application scenario, the initial display coefficient of the second display cabinet is corrected by the common error characteristics to eliminate the error in the initial display coefficient of the second display cabinet and improve the correction accuracy.

[0124] The specific calibration method is the same as step S24 in the aforementioned embodiment, please refer to the above text and will not be repeated here.

[0125] Through the above steps, this embodiment increases the number of statistical data by setting a 3*3 spliced ​​screen formed by splicing 9 first display boxes, thereby improving the statistical accuracy of the common error features, and amplifying the difference features between the display image data of each display box, so that in the process of counting the common error features, the common features between the display image data of each display box can be more accurately determined to improve the accuracy of the common error features between the first display boxes, and can also avoid the situation where the statistical calculation amount of the common error features is too large, resulting in a decrease in the efficiency of the entire correction method. That is, the spliced ​​screen of this embodiment can not only improve the accuracy of the common error features and the accuracy of subsequent corrections, but also reduce resource waste to a certain extent, ensure correction efficiency, and improve the correction uniformity of the display boxes.

[0126] See also Figure 7 , Figure 7 : is a schematic diagram of a framework of an embodiment of an electronic device of the present application. The electronic device 70 includes a memory 71 and a processor 72 coupled to each other, and the processor 72 is used to execute program instructions stored in the memory 71 to implement the steps of any of the above method embodiments. In a specific implementation scenario, the electronic device 70 may include but is not limited to: a microcomputer, a server, and in addition, the electronic device 70 may also include a mobile device such as a laptop computer and a tablet computer, which is not limited here.

[0127] Specifically, the processor 72 is used to control itself and the memory 71 to implement the steps of the performance detection method embodiment of any of the above-mentioned devices. The processor 72 can also be called a CPU (Central Processing Unit). The processor 72 may be an integrated circuit chip with signal processing capabilities. The processor 72 can also be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field-programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. In addition, the processor 72 can be implemented by an integrated circuit chip.

[0128] See also Figure 8 , Figure 8The schematic diagram of the framework of an embodiment of a computer-readable storage medium of the present application is as follows: The computer-readable storage medium 80 stores program instructions 801 that can be executed by a processor, and the program instructions 801 are used to implement the steps of the above method embodiment.

[0129] In the several embodiments provided in the present application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device implementation described above is only schematic. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation, such as units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0130] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0131] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0132] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of each implementation method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program code.

[0133] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for calibrating an LED display box, characterized in that: The method is applied to a display box correction system, which includes a control device, an acquisition device, a processing device and a display box, wherein the control device is connected to the processing device and the display box respectively, and the processing device is also connected to the acquisition device, wherein the display box includes a first display box and a second display box, and the method includes: The spliced ​​screen is collected by the acquisition device to obtain display image data, wherein the spliced ​​screen is formed by splicing a plurality of the first display boxes, and the display image data includes light point data of the first display boxes, and the light point data includes brightness data, or also includes chromaticity data; The processing device obtains common error characteristics of the plurality of first display cabinets based on the display image data, and the common error characteristics are used to correct the second display cabinets through the control device.

2. The correction method of the LED display box according to claim 1, characterized in that: The calibrating the second display box by the control device includes: Acquiring initial display information of the second display box by using an acquisition device of the display box correction system; The second display cabinet is corrected by the control device based on the common error feature and the initial display information.

3. The correction method of the LED display box according to claim 2, characterized in that: The calibration method of the LED display box comprises: Acquire 9 first display boxes, and splice the 9 first display boxes to form the spliced ​​screen with a length and width of 3*3 respectively; wherein the units of the length and width are the number of first display boxes; Acquiring the spliced ​​screen through the acquisition device to obtain display image data of the spliced ​​screen; Obtaining, by the processing device, a common error feature among the nine first display cabinets based on the display image data of the spliced ​​screen; The second display cabinet is corrected by the control device based on the common error characteristics among the nine first display cabinets and the initial display information of the second display cabinet.

4. The correction method of the LED display box according to claim 2, characterized in that: The common error feature includes a matrix of error coefficients of the multiple display modules of the display box; the initial display information of the second display box is composed of the initial display information of the multiple display modules of the second display box; The correcting the second display box based on the common error feature and the initial display information by the control device includes: The processing device performs logical operations on the error coefficients in the matrix and the initial display information of the corresponding display modules in the second display box to generate corrected display information of each display module, so that the control device can correct the second display box based on the corrected display information.

5. The correction method of the LED display box according to claim 2, characterized in that: In the case where the initial display information is initial display image data, the correcting the second display box based on the common error feature and the initial display information by the control device includes: Acquiring initial display image data of the second display box by using an acquisition device of the display box correction system; Correcting the initial display image data based on the common error feature by the processing device to obtain corrected image data of the second display box; A correction coefficient of the second display box is determined based on the corrected image data, so that the second display box is corrected based on the correction coefficient by the control device.

6. The method for calibrating an LED display box according to claim 2, characterized in that: In a case where the initial display information is an initial display coefficient, the correcting the second display box based on the common error feature and the initial display information by the control device includes: Acquiring initial display image data of the second display box by using an acquisition device of the display box correction system; Correcting the second display box based on the initial display image data by the processing device to obtain an initial display coefficient of the second display box; The initial display coefficient is modified based on the common error feature to obtain a correction coefficient of the second display box, so that the second display box is corrected based on the correction coefficient by the control device.

7. The LED display box calibration method according to claim 2, characterized in that: The acquiring device acquires the display image data from the spliced ​​screen, including: The spliced ​​screen is placed at a preset position in the display cabinet correction system, and the acquisition device at a fixed position performs image acquisition on the spliced ​​screen at the preset position at a preset temperature to obtain display image data of the spliced ​​screen; The collecting of the initial display image data of the second display box by the collecting device of the display box correction system comprises: The second display box is placed at the preset position, and the image of the second display box at the preset position is acquired at the preset temperature by the acquisition device at a fixed position to obtain initial display image data of the second display box.

8. The method for calibrating an LED display box according to claim 2, characterized in that: The acquiring device acquires the display image data from the spliced ​​screen, including: The acquisition device is used to respectively acquire display image data of the spliced ​​screen in a plurality of display states; wherein the brightness and / or chromaticity of each display state are different; The obtaining, by the processing device, a common error feature of the plurality of first display cabinets based on the display image data comprises: Obtaining, by the processing device, common error features of the plurality of first display cabinets in each of the display states based on display image data corresponding to the plurality of display states; The calibrating the second display box by the control device includes: The processing device uses each of the common error features to respectively perform corresponding corrections on initial display information of each of the display states displayed by the second display box, so that the second display box is calibrated by the control device.

9. The method for calibrating an LED display box according to any one of claims 1 to 8, characterized in that: The obtaining, by the processing device, a common error feature of the plurality of first display cabinets based on the display image data comprises: The display image data of the spliced ​​screen is divided by the processing device to obtain the display image data of each of the first display boxes, or the display image data of each of the first display boxes is obtained by the processing device based on the relative position of each of the first display boxes in the spliced ​​screen; The common error feature between the display image data of each of the first display boxes is obtained by statistics.

10. The LED display box calibration method according to claim 9, characterized in that: The common error features include common surface features and common thermal features; The statistically obtaining the common error feature between the display image data of each of the first display boxes includes: The brightness data in the display image data of each of the first display boxes are correspondingly superimposed, and in response to the presence of chromaticity data in the display image data of the first display boxes, the chromaticity data in the display image data of each of the first display boxes are correspondingly superimposed to obtain superimposed data; Performing data fitting on the superimposed data to determine the gradient gradual change data common to each of the first display boxes in the superimposed data; The common error feature including a common surface feature and a common thermal feature is generated based on the gradient variation data.

11. The method for calibrating an LED display box according to claim 10, characterized in that: The acquisition of the spliced ​​screen by the acquisition device to obtain display image data also includes: At a first temperature, acquiring first display image data from the spliced ​​screen by the acquisition device; acquiring first common error characteristics of the plurality of first display boxes based on the first display image data by the processing device; and At a second temperature, the spliced ​​screen is collected by the collection device to obtain second display image data; and second common error characteristics of the plurality of first display boxes are obtained by the processing device based on the second display image data; wherein the second temperature is greater than the first temperature; The statistically obtaining the common error feature between the display image data of each of the first display boxes also includes: The common surface feature is obtained by the processing device based on the first common error feature, and the common thermal feature is obtained based on the difference between the first common error feature and the second common error feature.

12. The method for calibrating an LED display box according to claim 10 or 11, characterized in that: The common error features also include edge error features; The statistically obtaining the common error feature between the display image data of each of the first display boxes also includes: Determine the edge error feature based on the individual edge feature of the first display box in the display image data of the spliced ​​screen and the difference between adjacent edge features; The common error feature is obtained by integrating the edge error feature, the common surface feature and the common thermal feature.

13. The method for calibrating an LED display box according to claim 12, characterized in that: The step of synthesizing the edge error feature, the common surface feature and the common thermal feature to obtain the common error feature comprises: Performing discrete value elimination processing on the edge error feature, the common surface feature and the common thermal feature respectively; The common error feature is obtained by comprehensively considering the edge error feature after the elimination process, the common surface feature after the elimination process, and the common thermal feature after the elimination process.

14. A display cabinet calibration system, characterized in that: The display box correction system is applied to the correction method of the LED display box according to any one of claims 1 to 13, and the display box correction system includes a control device, an acquisition device, a processing device and a display box, the control device is connected to the processing device and the display box respectively, and the processing device is also connected to the acquisition device, wherein the display box includes a first display box and a second display box; The acquisition device is used to acquire display image data from the spliced ​​screen; wherein the spliced ​​screen is formed by splicing a plurality of the first display boxes, and the display image data includes light point data of the first display boxes, and the light point data includes brightness data, or also includes chromaticity data; The processing device is used to obtain a common error feature of the plurality of first display cabinets based on the display image data; The control device is used to calibrate the second display cabinet based on the common error feature.

15. The display cabinet calibration system according to claim 14, characterized in that: The display box is a spliced ​​screen formed by splicing 9 first display boxes, the length and width of which are 3*3 respectively, and the length and width of the spliced ​​screen are 3*3 respectively; wherein the unit of the length and width is the number of first display boxes; The processing device is further used to obtain the common error characteristics of the nine first display boxes based on the display image data of the spliced ​​screen; The control device is further configured to calibrate the second display cabinet based on the common error characteristics of the nine first display cabinets and the initial display information of the second display cabinet.

16. An electronic device, characterized in that: It comprises a memory and a processor coupled to each other, wherein the processor is used to execute program instructions stored in the memory to implement the correction method of the LED display box according to any one of claims 1 to 13.

17. A computer-readable storage medium having program instructions stored thereon, characterized in that: When the program instructions are executed by a processor, the correction method for the LED display box according to any one of claims 1 to 13 is implemented.

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