A method, device and electronic device for LED display screen calibration based on spare module

Abstract

The present invention discloses a method, device and electronic device for correcting an LED display screen based on a spare module, the method comprising: determining a brightness coefficient ratio; determining a fourth brightness correction coefficient according to a third brightness correction coefficient and a brightness coefficient ratio; determining a color gamut conversion matrix according to a first brightness chromaticity correction coefficient average matrix and a second brightness chromaticity correction coefficient average matrix; determining a fourth brightness chromaticity correction coefficient matrix according to the color gamut conversion matrix and a third brightness chromaticity correction coefficient matrix; replacing the brightness correction coefficient in the fourth brightness chromaticity correction coefficient matrix with the fourth brightness correction coefficient, obtaining a target brightness chromaticity correction coefficient matrix for each light point, so as to correct the LED display screen. An algorithm for correcting coefficients can be constructed through the coefficient relationship between the spare module and the entire screen, and correction processing can be performed on a specified area, which can not only ensure the display effect after correction, but also greatly reduce the correction time and improve the correction rate.

Description

Technical Field

[0001] The present invention relates to the technical field of LED display screen correction, and in particular to a method, a device and an electronic device for LED display screen correction based on a spare module. Background Art

[0002] As a widely used display device, the display effect of LED display screen will directly affect the experience of the observer. Therefore, it is necessary to ensure the uniformity of the brightness and chromaticity of the light points in the LED display screen through calibration. At present, most LED display screens are constructed with a large number of modules (such as the smallest unit LED light board). Some modules may have poor display effects (such as abnormal brightness and chromaticity or inability to display brightness) due to circuit problems, resulting in a large difference between other modules on the same display screen. At this time, the modules with poor display effects need to be replaced. In the prior art, the brightness and chromaticity of the modules are usually adjusted manually by adjusting the software, and the human eye needs to observe the adjustment effect. Not only multiple adjustments are required, but the human eye also needs to observe all the time, which is time-consuming and labor-intensive, and the final effect may also be poor.

[0003] Therefore, people in this field are in urgent need of finding a new technical solution to solve the above problems. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present invention discloses a method, a device and an electronic device for calibrating an LED display screen based on a spare module.

[0005] According to a first aspect of the disclosed embodiment of the present invention, a method for calibrating an LED display screen based on a spare module is provided, the method comprising:

[0006] According to the average value of the first brightness correction coefficients of all lamps in the area to be replaced on the LED display screen, the average value of the second brightness correction coefficients of all lamps in all neighboring areas adjacent to the area to be replaced, and the average value of the third brightness correction coefficients of all lamps after the LED display screen replaces the spare module, the brightness coefficient ratio is determined by a preset coefficient ratio determination formula, wherein the spare module is used to replace the LED module in the area to be replaced, and the size of the spare module is the same as the size of the area to be replaced;

[0007] Determine a fourth brightness correction coefficient for each lamp point in the LED display screen according to the third brightness correction coefficient for each lamp point after the LED display screen replaces the spare module and the brightness coefficient ratio;

[0008] Determine a color gamut conversion matrix according to a first brightness and chromaticity correction coefficient average value matrix of each lamp point before the LED display screen replaces the spare module and a second brightness and chromaticity correction coefficient average value matrix of each lamp point in the spare module;

[0009] Determine a fourth brightness and chromaticity correction coefficient matrix for each lamp point according to the color gamut conversion matrix and the third brightness and chromaticity correction coefficient matrix for each lamp point after the LED display screen replaces the spare module;

[0010] The brightness correction coefficient in the fourth brightness and chromaticity correction coefficient matrix is ​​replaced with the fourth brightness correction coefficient, and the target brightness and chromaticity correction coefficient matrix of each lamp point is obtained to calibrate the LED display screen.

[0011] Optionally, the coefficient ratio determination formula is:

[0012] R=(C1+C2) / (2*C3),

[0013] Among them, R is the brightness coefficient ratio, C1 is the average value of the first brightness correction coefficients of all lamps in the area to be replaced on the LED display screen, C2 is the average value of the second brightness correction coefficients of all lamps in all neighboring areas adjacent to the area to be replaced, and C3 is the average value of the third brightness correction coefficients of all lamps after the spare module of the LED display screen is replaced.

[0014] Optionally, determining the fourth brightness correction coefficient of each lamp point in the LED display screen according to the third brightness correction coefficient of each lamp point after the spare module of the LED display screen is replaced and the brightness coefficient ratio includes:

[0015] Obtain a third brightness correction coefficient C of each lamp point after the LED display screen replaces the spare module;

[0016] According to the brightness coefficient ratio R and the third brightness correction coefficient C, a fourth brightness correction coefficient Cn=C*R of each light point in the LED display screen is determined.

[0017] Optionally, determining the color gamut conversion matrix according to the first brightness and chromaticity correction coefficient average value matrix of each lamp point before the LED display screen replaces the spare module and the second brightness and chromaticity correction coefficient average value matrix of each lamp point in the spare module includes:

[0018] Obtain a second brightness and chromaticity correction coefficient average value matrix M1 for each lamp point in the spare module;

[0019] Obtain the first brightness and chromaticity correction coefficient average value matrix M2 of each lamp point before the LED display screen replaces the spare module;

[0020] According to the second brightness and chromaticity correction coefficient average value matrix M1 and the first brightness and chromaticity correction coefficient average value matrix M2, a color gamut conversion matrix Mt=M1\M2 is determined.

[0021] Optionally, the determining of a fourth brightness and chromaticity correction coefficient matrix for each lamp point according to the color gamut conversion matrix and a third brightness and chromaticity correction coefficient matrix for each lamp point after the LED display screen replaces the spare module comprises:

[0022] Obtain the third brightness and chromaticity correction coefficient matrix Mi of each lamp point after the LED display screen replaces the spare module;

[0023] According to the color gamut conversion matrix Mt and the third brightness and chromaticity correction coefficient matrix Mi, a fourth brightness and chromaticity correction coefficient matrix Mai=Mi*Mt is determined.

[0024] Optionally, the method further includes:

[0025] Obtaining a fifth brightness correction coefficient of each lamp point before the LED display screen replaces the spare module, and a third brightness correction coefficient of each lamp point after the LED display screen replaces the spare module;

[0026] Determine, according to the fifth brightness correction coefficient, an average value of first brightness correction coefficients of all lamps in the area to be replaced on the LED display screen, and an average value of second brightness correction coefficients of all lamps in all neighboring areas adjacent to the area to be replaced;

[0027] The average value of the third brightness correction coefficients of all lamp points after the spare module of the LED display screen is replaced is determined according to the third brightness correction coefficient.

[0028] According to a second aspect of the disclosed embodiment of the present invention, there is provided an LED display screen calibration device based on a spare module, the device comprising:

[0029] A coefficient ratio determination module, which determines the brightness coefficient ratio by a preset coefficient ratio determination formula according to an average value of first brightness correction coefficients of all lamps in the area to be replaced on the LED display screen, an average value of second brightness correction coefficients of all lamps in all neighboring areas adjacent to the area to be replaced, and an average value of third brightness correction coefficients of all lamps after the LED display screen is replaced with a spare module, wherein the spare module is used to replace the LED module in the area to be replaced, and the size of the spare module is the same as the size of the area to be replaced;

[0030] a brightness correction coefficient determination module, connected to the coefficient ratio determination module, and determining a fourth brightness correction coefficient for each lamp point in the LED display screen according to the third brightness correction coefficient of each lamp point after the LED display screen replaces the spare module and the brightness coefficient ratio;

[0031] a color gamut conversion matrix determination module, connected to the second brightness correction coefficient determination module, and determining a color gamut conversion matrix according to a first brightness chromaticity correction coefficient average value matrix of each lamp point before the LED display screen replaces the spare module and a second brightness chromaticity correction coefficient average value matrix of each lamp point in the spare module;

[0032] a brightness and chromaticity correction coefficient matrix determination module, connected to the color gamut conversion matrix determination module, and determining a fourth brightness and chromaticity correction coefficient matrix for each lamp point according to the color gamut conversion matrix and the third brightness and chromaticity correction coefficient matrix for each lamp point after the spare module of the LED display screen is replaced;

[0033] The target brightness and chromaticity correction coefficient matrix determination module is connected to the brightness and chromaticity correction coefficient matrix determination module, replaces the brightness correction coefficient in the fourth brightness and chromaticity correction coefficient matrix with the fourth brightness correction coefficient, obtains the target brightness and chromaticity correction coefficient matrix of each lamp point, so as to calibrate the LED display screen.

[0034] Optionally, the brightness correction coefficient determination module includes:

[0035] A third determination unit, obtaining a third brightness correction coefficient C of each lamp point after the LED display screen replaces the spare module;

[0036] The fourth determination unit is connected to the third determination unit, and determines the fourth brightness correction coefficient Cn=C*R of each light point in the LED display screen according to the brightness coefficient ratio R and the third brightness correction coefficient C.

[0037] Optionally, the color gamut conversion matrix determination module includes:

[0038] A first average value determination unit, which obtains a second brightness and chromaticity correction coefficient average value matrix M1 for each lamp point in the spare module;

[0039] A second average value determination unit, connected to the first average value determination unit, obtains a first brightness and chromaticity correction coefficient average value matrix M2 of each lamp point before the LED display screen replaces the spare module;

[0040] The color gamut conversion matrix determining unit is connected to the second average value determining unit, and determines the color gamut conversion matrix Mt=M1\M2 according to the second brightness and chromaticity correction coefficient average value matrix M1 and the first brightness and chromaticity correction coefficient average value matrix M2.

[0041] According to a third aspect of the disclosed embodiments of the present invention, there is provided an electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

[0042] A memory for storing instructions executable by the processor;

[0043] The processor is used to implement the steps of the LED display screen correction method based on the spare module described in the first aspect of the embodiment disclosed in the present invention when executing the instructions stored in the memory.

[0044] In summary, the present invention discloses a method, device and electronic device for calibrating an LED display screen based on a spare module, the method comprising: determining a brightness coefficient ratio; determining a fourth brightness correction coefficient according to a third brightness correction coefficient and the brightness coefficient ratio; determining a color gamut conversion matrix according to a first brightness chromaticity correction coefficient average value matrix and a second brightness chromaticity correction coefficient average value matrix; determining a fourth brightness chromaticity correction coefficient matrix according to the color gamut conversion matrix and the third brightness chromaticity correction coefficient matrix; replacing the brightness correction coefficient in the fourth brightness chromaticity correction coefficient matrix with the fourth brightness correction coefficient, and obtaining a target brightness chromaticity correction coefficient matrix for each lamp point to calibrate the LED display screen.

[0045] Through the coefficient relationship between the spare module and the whole screen, an algorithm for correcting the coefficient can be constructed to perform correction processing on the specified area, which can not only ensure the display effect after correction, but also greatly reduce the correction time and improve the correction rate.

[0046] Other features and advantages disclosed in the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0048] Figure 1 It is a flow chart of a method for calibrating an LED display screen based on a spare module according to an exemplary embodiment;

[0049] Figure 2 is based on Figure 1 A flowchart of a coefficient acquisition method is shown;

[0050] Figure 3 is based on Figure 1 A flow chart of a method for determining a second brightness correction coefficient is shown;

[0051] Figure 4 It is a structural block diagram of an LED display screen correction device based on a spare module according to an exemplary embodiment;

[0052] Figure 5 is based on Figure 4A structural block diagram of a brightness correction coefficient determination module is shown;

[0053] Figure 6 is based on Figure 4 A structural block diagram of a color gamut conversion matrix determination module is shown;

[0054] Figure 7 The diagram is a schematic structural diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0055] The specific embodiments disclosed in the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0056] Figure 1 is a flow chart of a method for calibrating an LED display screen based on a spare module according to an exemplary embodiment. Figure 1 As shown, the method includes:

[0057] In step 101, the brightness coefficient ratio is determined by a preset coefficient ratio determination formula based on the average value of the first brightness correction coefficients of all lamp points in the area to be replaced on the LED display screen, the average value of the second brightness correction coefficients of all lamp points in all neighboring areas adjacent to the area to be replaced, and the average value of the third brightness correction coefficients of all lamp points after the spare module of the LED display screen is replaced.

[0058] The spare module is used to replace the LED module in the area to be replaced, and the size of the spare module is the same as the size of the area to be replaced.

[0059] For example, in the disclosed embodiment of the present invention, after determining the area to be replaced on the LED display screen where the spare module needs to be replaced (usually composed of one or more LED modules), in order to perform brightness and chromaticity correction on the LED display screen after the spare module is replaced, it is necessary to first obtain the first brightness correction coefficient average value C1 of each lamp point in the area to be replaced, the second brightness correction coefficient average value C2 of each lamp point in all neighboring areas adjacent to the area to be replaced, and the third brightness correction coefficient average value C3 of each lamp point after the spare module of the LED display screen is replaced. And determine the brightness coefficient ratio according to the first brightness correction coefficient average value C1, the second brightness correction coefficient average value C2 and the third brightness correction coefficient average value C3.

[0060] Among them, it can be understood that there are usually 8 neighboring areas adjacent to the area to be replaced, namely the LED module above the area to be replaced, the upper right LED module, the right LED module, the lower right LED module, the lower LED module, the lower left LED module, the left LED module and the upper left LED module. In addition, due to the different positions of the area to be replaced on the LED display screen, the number of the above-mentioned neighboring areas will also change. For example, when the area to be replaced is the LED module in the upper left corner of the LED display screen, the number of neighboring areas is 3, namely the right LED module, the lower right LED module and the lower LED module of the area to be replaced. The spare module is used to replace the LED module with the replacement area. The shape and size of the spare module are the same as the shape and size of the area to be replaced, and usually, the cabinet model of the spare module is also the same as the cabinet model of the LED module in the area to be replaced.

[0061] It should be noted that the first brightness correction coefficient average value C1, the second brightness correction coefficient average value C2 and the third brightness correction coefficient average value C3 in the disclosed implementation of the present invention refer to the average value of the brightness correction coefficient of each lamp point, and the brightness correction coefficient is represented in a matrix form, which is Among them, Cr, Cg and Cb represent the correction coefficients of the three color channels R, G and B respectively. In addition, since the original brightness value of each light point on the LED display can be expressed as Among them, R, G and B represent the components of the original brightness value of each light point on the three color channels. Therefore, the brightness correction coefficient matrix can also be expressed as

[0062] The coefficient ratio determination formula is:

[0063] R=(C1+C2) / (2*C3),

[0064] Among them, R is the brightness coefficient ratio, C1 is the average value of the first brightness correction coefficient of all lamps in the area to be replaced on the LED display screen, C2 is the average value of the second brightness correction coefficient of all lamps in all neighboring areas adjacent to the area to be replaced, and C3 is the average value of the third brightness correction coefficient of all lamps after the spare module of the LED display screen is replaced.

[0065] For example, the principle of the coefficient ratio determination formula is: if the average value of the second brightness correction coefficient of each lamp point in all neighboring areas is C2, the average value of the first brightness correction coefficient of each lamp point in the area to be replaced is C1, and the average value of the third brightness correction coefficient of each lamp point after the LED display screen replaces the spare module is C3, then the new spare coefficient is C / C3=(C1+C2) / (C3*2).

[0066] In addition, it should be noted that the above-mentioned first brightness correction coefficient average value C1, second brightness correction coefficient average value C2 and third brightness correction coefficient average value C3 need to be obtained according to the preset brightness correction coefficient of the LED display screen. Therefore, before executing the above-mentioned step 101, steps 201-203 need to be executed first.

[0067] Figure 2 is based on Figure 1 A flow chart of a coefficient acquisition method is shown in FIG. Figure 2 As shown, the method includes:

[0068] In step 201, the fifth brightness correction coefficient of each lamp point before the spare module of the LED display screen is replaced, and the third brightness correction coefficient of each lamp point after the spare module of the LED display screen is replaced are obtained.

[0069] In step 202, the average value of the first brightness correction coefficients of all lamps in the area to be replaced on the LED display screen and the average value of the second brightness correction coefficients of all lamps in all neighboring areas adjacent to the area to be replaced are determined according to the fifth brightness correction coefficient.

[0070] In step 203, an average value of the third brightness correction coefficients of all lamp points of the LED display screen after the spare module is replaced is determined according to the third brightness correction coefficient.

[0071] For example, the fifth brightness correction coefficient and the third brightness correction coefficient are calculated point by point in advance and stored in a box storage chip or a computer storage space. The fifth brightness correction coefficient is the brightness correction coefficient of each lamp point before the spare module of the LED display is replaced, and then the average value of the first brightness correction coefficient of each lamp point can be obtained according to the fifth brightness correction coefficient. The first brightness correction coefficient is the brightness correction coefficient of each lamp point after the spare module of the LED display is replaced, and then the average value of the third brightness correction coefficient of each lamp point after the spare module is replaced can be obtained according to the third brightness correction coefficient.

[0072] It is understandable that the third brightness correction coefficient is usually obtained by the staff when testing the spare module before it leaves the factory. The spare module is installed at the corresponding position on the LED display screen, and the LED display screen is calibrated point by point for the entire screen, so as to obtain the brightness correction coefficient of each lamp point. When obtaining the third brightness correction coefficient in step 201, it is only necessary to call the pre-stored brightness correction coefficient through the upper computer software. In this way, after replacing the spare module in the embodiment disclosed by the present invention, it is not necessary to calibrate the entire LED display screen again to obtain a new correction coefficient. Instead, the target brightness and chromaticity correction coefficient matrix of each lamp point is calculated through steps 101-105, thereby saving the time of calibrating the entire screen.

[0073] In step 102, a fourth brightness correction coefficient of each lamp point in the LED display screen is determined according to the third brightness correction coefficient of each lamp point after the spare module of the LED display screen is replaced and the ratio of the brightness coefficients.

[0074] Specifically, Figure 3 is based on Figure 1 A flowchart of a second brightness correction coefficient determination method is shown in FIG. Figure 3 As shown, step 102 includes:

[0075] In step 1021, a third brightness correction coefficient C of each lamp point after the spare module of the LED display screen is replaced is obtained.

[0076] In step 1022, according to the brightness coefficient ratio R and the third brightness correction coefficient C, a fourth brightness correction coefficient Cn=C*R of each light point in the LED display screen is determined.

[0077] For example, the fourth brightness correction coefficient of each lamp point can be obtained through the third brightness correction coefficient and the brightness coefficient ratio. The fourth brightness correction coefficient is used to replace the brightness correction coefficient in the fourth brightness and chromaticity correction coefficient matrix in the following step 105 to form a target brightness and chromaticity correction coefficient matrix.

[0078] In step 103, a color gamut conversion matrix is ​​determined according to a first brightness and chromaticity correction coefficient average value matrix of each lamp point before the spare module of the LED display screen is replaced and a second brightness and chromaticity correction coefficient average value matrix of each lamp point in the spare module.

[0079] Specifically, obtain the second brightness and chromaticity correction coefficient average value matrix M1 of each lamp point in the spare module; obtain the first brightness and chromaticity correction coefficient average value matrix M2 of each lamp point before the LED display screen replaces the spare module; determine the color gamut conversion matrix Mt=M1\M2 based on the second brightness and chromaticity correction coefficient average value matrix M1 and the first brightness and chromaticity correction coefficient average value matrix M2.

[0080] For example, the second brightness and chromaticity correction coefficient average matrix M1 of each lamp point in the spare module can be expressed as Among them, Rr1 is the correction coefficient of the red light when the light point displays red, Rg1 is the correction coefficient of the green light when the light point displays red, Rb1 is the correction coefficient of the blue light when the light point displays red, Gr1 is the correction coefficient of the red light when the light point displays green, Gg1 is the correction coefficient of the green light when the light point displays green, Gb1 is the correction coefficient of the blue light when the light point displays green, Br1 is the correction coefficient of the red light when the light point displays blue, Bg1 is the correction coefficient of the green light when the light point displays blue, and Bb1 is the correction coefficient of the blue light when the light point displays blue. The first brightness and chromaticity correction coefficient average value matrix M2 of each light point before the LED display screen replaces the spare module can be expressed as Among them, Rr2 is the correction coefficient of the red light when the light point displays red, Rg2 is the correction coefficient of the green light when the light point displays red, Rb2 is the correction coefficient of the blue light when the light point displays red, Gr2 is the correction coefficient of the red light when the light point displays green, Gg2 is the correction coefficient of the green light when the light point displays green, Gb2 is the correction coefficient of the blue light when the light point displays green, Br2 is the correction coefficient of the red light when the light point displays blue, Bg2 is the correction coefficient of the green light when the light point displays blue, and Bb2 is the correction coefficient of the blue light when the light point displays blue. The color gamut conversion matrix Mt can be obtained through the second brightness and chromaticity correction coefficient average value matrix M1 and the first brightness and chromaticity correction coefficient average value matrix M2:

[0081] In step 104, a fourth brightness and chromaticity correction coefficient matrix for each lamp point is determined according to the color gamut conversion matrix and the third brightness and chromaticity correction coefficient matrix for each lamp point after the spare module of the LED display screen is replaced.

[0082] Specifically, the third brightness and chromaticity correction coefficient matrix Mi of each lamp point after the spare module of the LED display screen is replaced is obtained; according to the color gamut conversion matrix Mt and the third brightness and chromaticity correction coefficient matrix Mi, the fourth brightness and chromaticity correction coefficient matrix Mai=Mi*Mt is determined.

[0083] For example, according to the third brightness and chromaticity correction coefficient matrix Mi of each lamp point after the LED display screen replaces the spare module and the above-mentioned color gamut conversion matrix Mt, the fourth brightness and chromaticity correction coefficient matrix of each lamp point is determined:

[0084] In step 105, the brightness correction coefficient in the fourth brightness and chromaticity correction coefficient matrix is ​​replaced with the fourth brightness correction coefficient, and the target brightness and chromaticity correction coefficient matrix of each lamp point is obtained to calibrate the LED display screen.

[0085] For example, it can be understood that the brightness correction coefficients of the fourth brightness correction coefficient matrix are Rr', Gg' and Bb', which are replaced by the fourth brightness correction coefficient matrix to form a new target brightness correction coefficient matrix. According to the target brightness correction coefficient matrix, the brightness and chromaticity of each light point in the LED display are adjusted, and the LED display calibration after the replacement of the spare module is completed.

[0086] Figure 4 is a structural block diagram of a LED display screen correction device based on a spare module according to an exemplary embodiment. Figure 4 As shown, the device 400 includes:

[0087] The coefficient ratio determination module 410 determines the brightness coefficient ratio by a preset coefficient ratio determination formula according to the average value of the first brightness correction coefficients of all lamps in the area to be replaced on the LED display screen, the average value of the second brightness correction coefficients of all lamps in all neighboring areas adjacent to the area to be replaced, and the average value of the third brightness correction coefficients of all lamps after the LED display screen is replaced with a spare module, wherein the spare module is used to replace the LED module in the area to be replaced, and the size of the spare module is the same as the size of the area to be replaced;

[0088] The brightness correction coefficient determination module 420 is connected to the coefficient ratio determination module 410, and determines the fourth brightness correction coefficient of each lamp point in the LED display screen according to the third brightness correction coefficient of each lamp point after the spare module of the LED display screen is replaced and the brightness coefficient ratio;

[0089] A color gamut conversion matrix determination module 430 is connected to the second brightness correction coefficient determination module 420, and determines a color gamut conversion matrix according to a first brightness chromaticity correction coefficient average value matrix of each lamp point before the LED display screen replaces the spare module and a second brightness chromaticity correction coefficient average value matrix of each lamp point in the spare module;

[0090] A brightness and chromaticity correction coefficient matrix determination module 440 is connected to the color gamut conversion matrix determination module 430, and determines a fourth brightness and chromaticity correction coefficient matrix for each lamp point according to the color gamut conversion matrix and the third brightness and chromaticity correction coefficient matrix for each lamp point after the spare module of the LED display screen is replaced;

[0091] The target brightness and chromaticity correction coefficient matrix determination module 450 is connected to the brightness and chromaticity correction coefficient matrix determination module 440, replaces the brightness correction coefficient in the fourth brightness and chromaticity correction coefficient matrix with the fourth brightness correction coefficient, and obtains the target brightness and chromaticity correction coefficient matrix of each lamp point to calibrate the LED display screen.

[0092] Figure 5 is based on Figure 4 A structural block diagram of a brightness correction coefficient determination module is shown in FIG. Figure 5 As shown, the brightness correction coefficient determination module 420 includes:

[0093] The third determining unit 421 obtains a third brightness correction coefficient C of each lamp point after the spare module of the LED display screen is replaced;

[0094] The fourth determining unit 422 is connected to the third determining unit 421, and determines a fourth brightness correction coefficient Cn=C*R of each light point in the LED display screen according to the brightness coefficient ratio R and the third brightness correction coefficient C.

[0095] Figure 6is based on Figure 4 A structural block diagram of a color gamut conversion matrix determination module is shown in FIG. Figure 6 As shown, the color gamut conversion matrix determination module 430 includes:

[0096] The first average value determination unit 431 obtains the second brightness and chromaticity correction coefficient average value matrix M1 of each lamp point in the spare module;

[0097] The second average value determination unit 432 is connected to the first average value determination unit 431, and obtains the first brightness and chromaticity correction coefficient average value matrix M2 of each lamp point before the LED display screen replaces the spare module;

[0098] The color gamut conversion matrix determining unit 433 is connected to the second average value determining unit 432, and determines the color gamut conversion matrix Mt=M1\M2 according to the second brightness and chromaticity correction coefficient average value matrix M1 and the first brightness and chromaticity correction coefficient average value matrix M2.

[0099] Figure 7 is a schematic diagram showing the structure of an electronic device according to an exemplary embodiment. Figure 7 As shown, it includes a processor 001, a communication interface 002, a memory 003 and a communication bus 004, wherein the processor 001, the communication interface 002, and the memory 003 communicate with each other through the communication bus 004.

[0100] Memory 003, used for storing computer programs;

[0101] The processor 001 is used to implement the above-mentioned LED display screen calibration method based on the spare module when executing the program stored in the memory 003. The method includes:

[0102] The brightness coefficient ratio is determined by a preset coefficient ratio determination formula according to an average value of first brightness correction coefficients of all lamps in the area to be replaced on the LED display screen, an average value of second brightness correction coefficients of all lamps in all neighboring areas adjacent to the area to be replaced, and an average value of third brightness correction coefficients of all lamps after the LED display screen is replaced with a spare module, wherein the spare module is used to replace the LED module in the area to be replaced, and the size of the spare module is the same as the size of the area to be replaced;

[0103] Determine a fourth brightness correction coefficient for each lamp point in the LED display screen according to the third brightness correction coefficient for each lamp point after the LED display screen replaces the spare module and the ratio of the brightness coefficient;

[0104] Determine a color gamut conversion matrix according to a first brightness and chromaticity correction coefficient average value matrix of each lamp point before the LED display screen replaces the spare module and a second brightness and chromaticity correction coefficient average value matrix of each lamp point in the spare module;

[0105] Determine a fourth brightness and chromaticity correction coefficient matrix for each lamp point according to the color gamut conversion matrix and the third brightness and chromaticity correction coefficient matrix for each lamp point after the spare module of the LED display screen is replaced;

[0106] The brightness correction coefficient in the fourth brightness and chromaticity correction coefficient matrix is ​​replaced with the fourth brightness correction coefficient, and the target brightness and chromaticity correction coefficient matrix of each lamp point is obtained to calibrate the LED display screen.

[0107] In summary, the present invention discloses a method, device and electronic device for correcting an LED display screen based on a spare module, the method comprising: determining a brightness coefficient ratio; determining a fourth brightness correction coefficient according to a third brightness correction coefficient and a brightness coefficient ratio; determining a color gamut conversion matrix according to a first brightness chromaticity correction coefficient average matrix and a second brightness chromaticity correction coefficient average matrix; determining a fourth brightness chromaticity correction coefficient matrix according to the color gamut conversion matrix and the third brightness chromaticity correction coefficient matrix; replacing the brightness correction coefficient in the fourth brightness chromaticity correction coefficient matrix with the fourth brightness correction coefficient, obtaining a target brightness chromaticity correction coefficient matrix for each light point, so as to correct the LED display screen. An algorithm for correcting coefficients can be constructed through the coefficient relationship between the spare module and the entire screen, and correction processing can be performed on the specified area, which can not only ensure the display effect after correction, but also greatly reduce the correction time and improve the correction rate.

[0108] In addition, in the disclosed embodiment of the present invention, the pre-stored brightness correction coefficient is retrieved by the host computer software. After the spare module of the LED display screen is replaced, there is no need to calibrate the entire LED display screen again to obtain a new correction coefficient, which further saves the time required for calibration.

[0109] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0110] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0111] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for calibrating an LED display screen based on a spare module, characterized in that: The method comprises: According to the average value of the first brightness correction coefficients of all lamps in the area to be replaced on the LED display screen, the average value of the second brightness correction coefficients of all lamps in all neighboring areas adjacent to the area to be replaced, and the average value of the third brightness correction coefficients of all lamps after the LED display screen replaces the spare module, the brightness coefficient ratio is determined by a preset coefficient ratio determination formula, wherein the spare module is used to replace the LED module in the area to be replaced, and the size of the spare module is the same as the size of the area to be replaced; Determine a fourth brightness correction coefficient for each lamp point in the LED display screen according to the third brightness correction coefficient for each lamp point after the LED display screen replaces the spare module and the brightness coefficient ratio; Determine a color gamut conversion matrix according to a first brightness and chromaticity correction coefficient average value matrix of each lamp point before the LED display screen replaces the spare module and a second brightness and chromaticity correction coefficient average value matrix of each lamp point in the spare module; Determine a fourth brightness and chromaticity correction coefficient matrix for each lamp point according to the color gamut conversion matrix and the third brightness and chromaticity correction coefficient matrix for each lamp point after the LED display screen replaces the spare module; Replacing the brightness correction coefficient in the fourth brightness and chromaticity correction coefficient matrix with the fourth brightness correction coefficient, obtaining a target brightness and chromaticity correction coefficient matrix for each light point, so as to calibrate the LED display screen; The coefficient ratio determination formula is: R=(C1+C2) / (2*C3), Among them, R is the brightness coefficient ratio, C1 is the average value of the first brightness correction coefficients of all lamps in the area to be replaced on the LED display screen, C2 is the average value of the second brightness correction coefficients of all lamps in all neighboring areas adjacent to the area to be replaced, and C3 is the average value of the third brightness correction coefficients of all lamps after the spare module of the LED display screen is replaced.

2. The LED display screen calibration method based on spare module according to claim 1 is characterized in that: The determining of the fourth brightness correction coefficient of each lamp point in the LED display screen according to the third brightness correction coefficient of each lamp point after the LED display screen replaces the spare module and the brightness coefficient ratio comprises: Obtain a third brightness correction coefficient C of each lamp point after the LED display screen replaces the spare module; According to the brightness coefficient ratio R and the third brightness correction coefficient C, a fourth brightness correction coefficient Cn=C*R of each light point in the LED display screen is determined.

3. The LED display screen calibration method based on spare module according to claim 1 is characterized in that: The method of determining the color gamut conversion matrix according to the first brightness and chromaticity correction coefficient average value matrix of each lamp point before the LED display screen replaces the spare module and the second brightness and chromaticity correction coefficient average value matrix of each lamp point in the spare module includes: Obtain a second brightness and chromaticity correction coefficient average value matrix M1 for each lamp point in the spare module; Obtain the first brightness and chromaticity correction coefficient average value matrix M2 of each lamp point before the LED display screen replaces the spare module; According to the second brightness and chromaticity correction coefficient average value matrix M1 and the first brightness and chromaticity correction coefficient average value matrix M2, a color gamut conversion matrix Mt=M1\M2 is determined.

4. The LED display screen calibration method based on spare module according to claim 3 is characterized in that: The method of determining a fourth brightness and chromaticity correction coefficient matrix for each lamp point according to the color gamut conversion matrix and the third brightness and chromaticity correction coefficient matrix for each lamp point after the LED display screen replaces the spare module comprises: Obtain the third brightness and chromaticity correction coefficient matrix Mi of each lamp point after the LED display screen replaces the spare module; According to the color gamut conversion matrix Mt and the third brightness and chromaticity correction coefficient matrix Mi, a fourth brightness and chromaticity correction coefficient matrix Mai=Mi*Mt is determined.

5. The LED display screen calibration method based on spare module according to claim 1 is characterized in that: The method further comprises: Obtaining a fifth brightness correction coefficient of each lamp point before the LED display screen replaces the spare module, and a third brightness correction coefficient of each lamp point after the LED display screen replaces the spare module; Determine, according to the fifth brightness correction coefficient, an average value of first brightness correction coefficients of all lamps in the area to be replaced on the LED display screen, and an average value of second brightness correction coefficients of all lamps in all neighboring areas adjacent to the area to be replaced; The average value of the third brightness correction coefficients of all lamp points after the spare module of the LED display screen is replaced is determined according to the third brightness correction coefficient.

6. A LED display screen calibration device based on spare module, characterized in that: The device comprises: A coefficient ratio determination module, which determines the brightness coefficient ratio by a preset coefficient ratio determination formula according to an average value of first brightness correction coefficients of all lamps in the area to be replaced on the LED display screen, an average value of second brightness correction coefficients of all lamps in all neighboring areas adjacent to the area to be replaced, and an average value of third brightness correction coefficients of all lamps after the LED display screen is replaced with a spare module, wherein the spare module is used to replace the LED module in the area to be replaced, and the size of the spare module is the same as the size of the area to be replaced; a brightness correction coefficient determination module, connected to the coefficient ratio determination module, and determining a fourth brightness correction coefficient for each lamp point in the LED display screen according to the third brightness correction coefficient of each lamp point after the LED display screen replaces the spare module and the brightness coefficient ratio; A color gamut conversion matrix determination module is connected to the brightness correction coefficient determination module, and determines a color gamut conversion matrix according to a first brightness chromaticity correction coefficient average value matrix of each lamp point before the LED display screen replaces the spare module and a second brightness chromaticity correction coefficient average value matrix of each lamp point in the spare module; a brightness and chromaticity correction coefficient matrix determination module, connected to the color gamut conversion matrix determination module, and determining a fourth brightness and chromaticity correction coefficient matrix for each lamp point according to the color gamut conversion matrix and the third brightness and chromaticity correction coefficient matrix for each lamp point after the spare module of the LED display screen is replaced; a target brightness and chromaticity correction coefficient matrix determination module, connected to the brightness and chromaticity correction coefficient matrix determination module, replacing the brightness correction coefficient in the fourth brightness and chromaticity correction coefficient matrix with the fourth brightness correction coefficient, and obtaining the target brightness and chromaticity correction coefficient matrix of each lamp point to calibrate the LED display screen; The coefficient ratio determination formula is: R=(C1+C2) / (2*C3), Among them, R is the brightness coefficient ratio, C1 is the average value of the first brightness correction coefficients of all lamps in the area to be replaced on the LED display screen, C2 is the average value of the second brightness correction coefficients of all lamps in all neighboring areas adjacent to the area to be replaced, and C3 is the average value of the third brightness correction coefficients of all lamps after the spare module of the LED display screen is replaced.

7. The LED display screen calibration device based on spare module according to claim 6 is characterized in that: The brightness correction coefficient determination module includes: A third determination unit, obtaining a third brightness correction coefficient C of each lamp point after the LED display screen replaces the spare module; The fourth determination unit is connected to the third determination unit, and determines the fourth brightness correction coefficient Cn=C*R of each light point in the LED display screen according to the brightness coefficient ratio R and the third brightness correction coefficient C.

8. The LED display screen calibration device based on spare module according to claim 6, characterized in that: The color gamut conversion matrix determination module includes: A first average value determination unit, which obtains a second brightness and chromaticity correction coefficient average value matrix M1 for each lamp point in the spare module; A second average value determination unit, connected to the first average value determination unit, obtains a first brightness and chromaticity correction coefficient average value matrix M2 of each lamp point before the LED display screen replaces the spare module; The color gamut conversion matrix determining unit is connected to the second average value determining unit, and determines the color gamut conversion matrix Mt=M1\M2 according to the second brightness and chromaticity correction coefficient average value matrix M1 and the first brightness and chromaticity correction coefficient average value matrix M2.

9. An electronic device, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; A memory for storing instructions executable by the processor; The processor is used to implement the steps of the LED display screen correction method based on the spare module according to any one of claims 1 to 5 when executing the instructions stored in the memory.

Images