A method, device and system for quickly updating correction coefficients of LED display screens

Abstract

The present invention discloses a method, device and system for quickly updating the correction coefficient of an LED display screen, which belongs to the field of LED display screen correction. The correction coefficient of the entire LED display screen is obtained, compressed and stored in a data frame according to the data format of the region; the regional offset data of the selected region in the LED display screen is obtained, the region where the coefficient needs to be replaced is calculated in the data frame and the corresponding compressed correction coefficient is obtained, which is decompressed and sent to the receiving card corresponding to the selected region to realize the rapid update of the correction coefficient in the region. The present invention divides the correction coefficient on the data frame into blocks for compressed storage. When the correction coefficient of the selected region needs to be updated, the region where the coefficient needs to be replaced in the data frame is calculated according to the regional offset data of the selected region, and the compressed correction coefficient in the region is obtained and decompressed. Compared with the traditional correction coefficient overall update method, the correction coefficient replacement rate is improved, thereby improving the display rate.

Description

Technical Field

[0001] The present invention relates to the technical field of LED display screen correction, and in particular to a method, device and system for quickly updating a correction coefficient of an LED display screen. Background Art

[0002] The current LED screen is composed of multiple boxes, which are composed of modules, and the modules are composed of multiple light boards. In actual use, if some areas in the LED screen have a large difference in brightness and color from other surrounding areas or some areas have no display problem, then it is necessary to replace the boxes, modules or light boards corresponding to the parts of the areas, and the correction coefficients corresponding to the areas in the host computer need to be replaced. The prior art is to directly replace all the correction coefficients through the host computer, which will affect the rate of replacing the coefficients. In addition, in another scenario, the operator needs to watch the display effect of an area in the LED screen without watching the display effect corresponding to the entire screen. The host computer cannot select the area to send the corresponding correction coefficient, and the correction coefficient needs to be sent as a whole, which will obviously affect the rate of replacing the coefficients. At the same time, in the above scenario, the correction coefficients in the LED screen are stored locally, and then all the correction coefficients are compressed. In the process of replacing the coefficients by the host computer, all the correction coefficients need to be decompressed, which occupies most of the running memory of the software, and the software processing time is also long, which will also affect the rate of replacing the coefficients.

[0003] Therefore, those skilled in the art are in urgent need of finding a method that can reduce the software running content and increase the replacement coefficient rate. Summary of the invention

[0004] In order to overcome the problem in the prior art that when replacing the box, module or light board corresponding to a part of the area in the LED display screen, all the correction coefficients need to be decompressed, which occupies most of the software running memory, the software processing time is long, and the coefficient replacement rate is slow, the present invention provides a method for quickly updating the correction coefficient of the LED display screen, comprising the following steps:

[0005] Step 1: Obtain the correction coefficient of the entire LED display screen, and select a data format corresponding to the correction coefficient for compression according to the cabinet actually used by the LED display screen;

[0006] Step 2, storing the compressed correction coefficients in a data frame according to the regional data format;

[0007] Step 3, obtaining the regional offset data of the selected area in the LED display screen, calculating the area in the data frame where the coefficient needs to be replaced according to the regional offset data, obtaining the compressed correction coefficient corresponding to the replacement coefficient area from the data frame, and decompressing the compressed correction coefficient corresponding to the replacement coefficient area to obtain the decompressed correction coefficient of the selected area in the LED display screen;

[0008] Step 4: Send the decompressed correction coefficient to the receiving card corresponding to the selected area of ​​the LED display screen to achieve rapid update of the correction coefficient in the area.

[0009] Preferably, in step one, the data format corresponding to the correction coefficient is one of byte type, integer type or floating point type; when the box is a silicon core box, the byte data format is used for compression; when the box is a general chip box, the integer or floating point data format is used for compression.

[0010] Preferably, in step 2, the correction coefficient format of the data frame is pre-set, and the generated data frame is composed of data corresponding to the data format of the compressed correction coefficient, including file header information and N blocks of correction coefficient information arranged in sequence, where N represents the number of blocks in the data frame, and each block of correction coefficient information in the data frame corresponds one-to-one to each area in the LED display screen.

[0011] Preferably, the file header information includes GUID, file version, overall X offset, overall Y offset, overall width, overall height and number of blocks;

[0012] The overall X offset and block X offset refer to the X-direction offset of the corresponding upper left corner offset coordinate relative to the coordinate (0, 0); the overall Y offset and block Y offset refer to the Y-direction offset of the corresponding upper left corner offset coordinate relative to the coordinate (0, 0);

[0013] The correction coefficient information includes block number, block X offset, block Y offset, block width, block height, block correction coefficient length, and correction coefficient corresponding to the block after compression;

[0014] In step 3, the regional offset data M (x, y, w, h) of the selected area in the LED display screen is obtained, and the x, y, x+w, y+h in the regional offset data M (x, y, w, h) are compared with the coordinates of the upper left corner of the LED display screen, and the block X offset, block Y offset, block width and block height of the correction coefficient information corresponding to the selected area in the data frame are calculated to obtain multiple block numbers corresponding to the selected area; and the compressed correction coefficient corresponding to the selected area in the data frame is obtained according to the multiple block numbers;

[0015] The selected area is a square with a total width of w and a total height of h. x represents the horizontal offset of the upper left corner of the selected area relative to the upper left corner of the LED display screen, y represents the vertical offset of the upper left corner of the selected area relative to the upper left corner of the LED display screen, x+w represents the horizontal offset of the lower right corner of the selected area relative to the upper left corner of the LED display screen, and y+h represents the vertical offset of the lower right corner of the selected area relative to the upper left corner of the LED display screen.

[0016] Preferably, during compression in step one, the compression module of the compression and decompression library is called to compress the correction coefficient of the original length of the entire LED display screen according to the selected data format to obtain the correction coefficient of the length of each block correction coefficient after compression; during decompression in step three, the decompression module of the compression and decompression library is called to decompress the correction coefficient of the compressed block correction coefficient length corresponding to the selected area in the data frame according to the specified data format to obtain the correction coefficient of the decompressed original length.

[0017] Preferably, after calculating a plurality of block numbers corresponding to the selected area according to the area offset data M (x, y, w, h) of the selected area, the cabinet corresponding to the selected area is determined according to the correspondence between the plurality of block numbers and the cabinets in the LED display screen;

[0018] By comparing x, y, x+w and y+h with the offset coordinates of the upper left corner of each cabinet corresponding to the selected area, the area range corresponding to the selected area in each cabinet is determined and sent together with the decompressed correction coefficient to the receiving card of the cabinet corresponding to the selected area of ​​the LED display.

[0019] The present invention also provides a correction coefficient updating device for an LED display screen, comprising a correction coefficient acquisition module, a correction coefficient compression module, a correction coefficient storage module, a regional offset data acquisition module, a data frame replacement coefficient regional calculation module, a data frame regional correction coefficient acquisition module, a correction coefficient decompression module and a correction coefficient sending module, wherein:

[0020] The correction coefficient acquisition module acquires the correction coefficient of the entire LED display screen, and the correction coefficient compression module compresses the acquired correction coefficient in a data format corresponding to the correction coefficient according to the actual usage scenario;

[0021] The correction coefficient storage module stores the compressed correction coefficient in a data frame according to the data format of the region;

[0022] The regional offset data acquisition module acquires the regional offset data of the selected area in the LED display screen, the data frame replacement coefficient area calculation module calculates the area where the coefficient needs to be replaced in the data frame according to the regional offset data, the data frame regional correction coefficient acquisition module acquires the compressed correction coefficient corresponding to the replacement coefficient area from the data frame, and the correction coefficient decompression module decompresses the compressed correction coefficient corresponding to the replacement coefficient area to obtain the decompressed correction coefficient of the selected area in the LED display screen;

[0023] The correction coefficient sending module sends the decompressed correction coefficient to the receiving card corresponding to the selected area of ​​the LED display screen to achieve rapid update of the correction coefficient in the area.

[0024] The present invention also provides a LED display screen correction coefficient updating system, comprising a host computer, a receiving card, a sending device and an LED display screen, wherein:

[0025] The host computer is connected to the sending device and updates the correction coefficient of the LED display screen according to the above-mentioned fast updating method of the correction coefficient of the LED display screen;

[0026] The sending device is connected to the receiving card, and is used to send the decompressed correction coefficient obtained by the correction coefficient updating device to the receiving card corresponding to the selected area of ​​the LED display screen;

[0027] The receiving card is connected to the LED display screen, and is used to receive the decompressed correction coefficients and apply them on the LED display screen.

[0028] The beneficial effects produced by the technical solution of the present invention are as follows:

[0029] (1) The correction coefficients on the data frame are divided into blocks for compressed storage. When the correction coefficients of the selected area in the LED display need to be updated, the area in the data frame corresponding to the area where the coefficients need to be replaced is calculated based on the area offset data of the selected area, and the compressed correction coefficients in the area are obtained for decompression. Compared with the traditional correction coefficient overall update method, the correction coefficient replacement rate is improved, thereby improving the display rate.

[0030] (2) The correction coefficients of the entire LED display are compressed and stored in different regions. Different compression formats with different precisions are used according to the cabinets actually used by the LED display. This can reduce the running memory of the software. At the same time, the decompressed correction coefficients are sent to the receiving cards in the corresponding areas without decompressing the correction coefficients of the entire screen. This reduces the software running memory usage, shortens the software processing time, and improves the replacement rate of the LED display correction coefficients. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 This is a flow chart of a quick update method of a preferred LED display screen correction coefficient of the present invention;

[0033] Figure 2 This is a schematic diagram of data block storage in a preferred data frame of the present invention;

[0034] Figure 3 It is a schematic diagram of the offset of the selected area in the preferred LED display screen of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of a preferred LED display screen correction coefficient updating device of the present invention;

[0036] Figure 5 It is a schematic diagram of the structure of a preferred LED display screen correction coefficient updating system of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] This implementation divides the correction coefficients on the data frame into blocks for compressed storage. When the correction coefficients of the selected area in the LED display need to be updated, the area in the data frame corresponding to the area where the coefficients need to be replaced is calculated based on the area offset data of the selected area, and the compressed correction coefficients in the area are obtained for decompression. Compared with the traditional correction coefficient overall update method, the correction coefficient replacement rate is improved, thereby improving the display rate. The specific implementation is as follows:

[0039] like Figure 1-3 As shown, the method for quickly updating the correction coefficient of the LED display screen includes the following steps:

[0040] Step S101: obtaining the correction coefficient of the entire LED display screen, and selecting a data format corresponding to the correction coefficient for compression according to the cabinet actually used by the LED display screen;

[0041] Step S102: storing the compressed correction coefficients in a data frame according to the regional data format;

[0042] Step S103: acquiring the area offset data of the selected area in the LED display screen, and calculating the area in the data frame where the coefficient needs to be replaced according to the area offset data;

[0043] Step S104: obtaining the compressed correction coefficient corresponding to the replacement coefficient area from the data frame, and decompressing the compressed correction coefficient corresponding to the replacement coefficient area to obtain the decompressed correction coefficient of the selected area in the LED display screen;

[0044] Step S105: Send the decompressed correction coefficient to the receiving card corresponding to the selected area of ​​the LED display screen to achieve rapid update of the correction coefficient in the area.

[0045] The correction coefficients on the data frame are divided into blocks for compressed storage. When the correction coefficients of the selected area in the LED display need to be updated, the area in the data frame that needs to replace the coefficients is calculated based on the area offset data of the selected area, and the compressed correction coefficients in the area are obtained for decompression. Compared with the traditional correction coefficient overall update method, the replacement rate of the correction coefficients is improved, thereby improving the display rate.

[0046] As a preferred implementation, in step S101, the data format corresponding to the correction coefficient is one of byte, integer or floating point. When the box is a silicon core box, the byte data format is used for compression; when the box is a general chip box, the integer or floating point data format is used for compression.

[0047] As a preferred implementation, the byte type includes 3Bcoef and 9Bcoef, wherein 3Bcoef is a brightness correction coefficient of 3 coefficients occupying 3 bytes; and 9Bcoef is a brightness and chromaticity correction coefficient of 9 coefficients occupying 3 bytes;

[0048] The integer type includes 3wcoef and 9wcoef, wherein 3wcoef is a brightness correction coefficient of 3 coefficients and occupies 6 bytes, and 9wcoef is a brightness and chromaticity correction coefficient of 9 coefficients and occupies 18 bytes;

[0049] The floating point type includes 3fcoef and 9fcoef, wherein 3fcoef is a brightness correction coefficient of 3 coefficients and occupies 12 bytes, and 9fcoef is a brightness and chromaticity correction coefficient of 9 coefficients and occupies 18 bytes.

[0050] It is worth mentioning that the loss precision of the three formats of byte, integer and floating point are different, which are 1 / 255, 1 / 65535, 1 / 1000000 respectively. The specific selection is related to the chip, the range of screen brightness change and the loss precision. The first one is used for silicon core cabinets, and the latter two are used for general chips, such as Chiptron, JuJu, Silan, Mingwei, and Mingyang cabinets. The first silicon core cabinet cannot use the latter two data formats, while the general chip cabinet can use the first data format.

[0051] As a preferred implementation, in step S102, the correction coefficient format of the data frame is pre-set, and the generated data frame is composed of data corresponding to the data format of the compressed correction coefficient, including file header information and N blocks of correction coefficient information arranged in sequence, where N represents the number of blocks in the data frame, and each block of correction coefficient information in the data frame corresponds to each area in the LED display screen. Figure 2 As shown, the data frame data sequentially includes file header information, a first block of correction coefficient information, a second block of correction coefficient information, ..., an Nth block of correction coefficient information.

[0052] As a preferred implementation, preferably, the file header information includes GUID, file version, overall X offset, overall Y offset, overall width, overall height and number of blocks;

[0053] The overall X offset and block X offset refer to the X-direction offset of the corresponding upper left corner offset coordinate relative to the coordinate (0, 0); the overall Y offset and block Y offset refer to the Y-direction offset of the corresponding upper left corner offset coordinate relative to the coordinate (0, 0);

[0054] The correction coefficient information includes block number, block X offset, block Y offset, block width, block height, block correction coefficient length, and correction coefficient corresponding to the block after compression;

[0055] In step S103, the regional offset data M (x, y, w, h) of the selected area in the LED display screen is obtained, and the block X offset, block Y offset, block width and block height of the correction coefficient information corresponding to the selected area in the data frame are calculated according to x, y, x+w, y+h in the regional offset data M (x, y, w, h), and the corresponding block numbers of the selected area are obtained; and the compressed correction coefficient corresponding to the selected area in the data frame is obtained according to the multiple block numbers;

[0056] like Figure 3As shown, the selected area 401 is a square with a total width of w and a total height of h; x represents the horizontal offset of the upper left corner of the selected area relative to the upper left corner of the LED display screen 400, y represents the vertical offset of the upper left corner of the selected area relative to the upper left corner of the LED display screen, x+w represents the horizontal offset of the lower right corner of the selected area relative to the upper left corner of the LED display screen, and y+h represents the vertical offset of the lower right corner of the selected area relative to the upper left corner of the LED display screen.

[0057] As a preferred implementation, during compression in step S101, the compression module of the compression and decompression library liblz4.lib is called to compress the correction coefficient of the original length of the entire LED display screen according to the selected data format to obtain the correction coefficient of the length of each compressed block correction coefficient; during decompression in step S104, the decompression module of the compression and decompression library liblz4.lib is called to decompress the correction coefficient of the compressed block correction coefficient length corresponding to the selected area in the data frame according to the specified data format to obtain the correction coefficient of the decompressed original length.

[0058] As a preferred implementation, after calculating a plurality of block numbers corresponding to the selected area according to the area offset data M (x, y, w, h) of the selected area, the cabinet corresponding to the selected area is determined according to the correspondence between the plurality of block numbers and the cabinets in the LED display screen;

[0059] By comparing x, y, x+w and y+h with the offset coordinates of the upper left corner of each cabinet corresponding to the selected area, the area range corresponding to the selected area in each cabinet is determined and sent together with the decompressed correction coefficient to the receiving card of the cabinet corresponding to the selected area of ​​the LED display.

[0060] like Figure 4 As shown, this embodiment also provides a correction coefficient updating device for an LED display screen, including a correction coefficient acquisition module 11, a correction coefficient compression module 12, a correction coefficient storage module 13, a regional offset data acquisition module 14, a data frame replacement coefficient region calculation module 15, a data frame region correction coefficient acquisition module 16, a correction coefficient decompression module 17 and a correction coefficient sending module 18, wherein:

[0061] The correction coefficient acquisition module acquires the correction coefficient of the entire LED display screen, and the correction coefficient compression module compresses the acquired correction coefficient in a data format corresponding to the correction coefficient according to the actual usage scenario;

[0062] The correction coefficient storage module stores the compressed correction coefficient in a data frame according to the data format of the region;

[0063] The regional offset data acquisition module acquires the regional offset data of the selected area in the LED display screen, the data frame replacement coefficient area calculation module calculates the area where the coefficient needs to be replaced in the data frame according to the regional offset data, the data frame regional correction coefficient acquisition module acquires the compressed correction coefficient corresponding to the replacement coefficient area from the data frame, and the correction coefficient decompression module decompresses the compressed correction coefficient corresponding to the replacement coefficient area to obtain the decompressed correction coefficient of the selected area in the LED display screen;

[0064] The correction coefficient sending module sends the decompressed correction coefficient to the receiving card corresponding to the selected area of ​​the LED display screen to achieve rapid update of the correction coefficient in the area.

[0065] like Figure 5 As shown, this embodiment also provides a LED display screen correction coefficient update system, including a host computer 100, a receiving card 200, a sending device 300 and an LED display screen 400, wherein:

[0066] The host computer 100 is connected to the sending device and updates the correction coefficient of the LED display screen according to the above-mentioned fast updating method of the correction coefficient of the LED display screen;

[0067] The sending device is connected to the receiving card, and is used to send the decompressed correction coefficient obtained by the correction coefficient updating device to the receiving card corresponding to the selected area of ​​the LED display screen;

[0068] The receiving card is connected to the LED display screen, and is used to receive the decompressed correction coefficients and apply them on the LED display screen.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for quickly updating the correction coefficient of an LED display screen, characterized in that: The steps include: Step 1: Obtain the correction coefficient of the entire LED display screen, and select a data format corresponding to the correction coefficient for compression according to the cabinet actually used by the LED display screen; Step 2, storing the compressed correction coefficients in a data frame according to the regional data format; Step 3, obtaining the regional offset data of the selected area in the LED display screen, calculating the area in the data frame where the coefficient needs to be replaced according to the regional offset data, obtaining the compressed correction coefficient corresponding to the replacement coefficient area from the data frame, and decompressing the compressed correction coefficient corresponding to the replacement coefficient area to obtain the decompressed correction coefficient of the selected area in the LED display screen; Step 4: Send the decompressed correction coefficient to the receiving card corresponding to the selected area of ​​the LED display screen to achieve rapid update of the correction coefficient in the area.

2. A method for quickly updating the correction coefficient of an LED display screen according to claim 1, characterized in that: In step 1, the data format corresponding to the correction coefficient is one of byte type, integer type or floating point type; when the box is a silicon core box, the byte data format is used for compression; when the box is a general chip box, the integer or floating point data format is used for compression.

3. A method for quickly updating the correction coefficient of an LED display screen according to claim 1, characterized in that: In step 2, the correction coefficient format of the data frame is pre-set, and the generated data frame is composed of data corresponding to the data format of the compressed correction coefficient, including file header information and N blocks of correction coefficient information arranged in sequence, where N represents the number of blocks in the data frame, and each block of correction coefficient information in the data frame corresponds one-to-one to each area in the LED display screen.

4. A method for quickly updating the correction coefficient of an LED display screen according to claim 3, characterized in that: The file header information includes GUID, file version, overall X offset, overall Y offset, overall width, overall height and number of blocks; The overall X offset and block X offset refer to the X-direction offset of the corresponding upper left corner offset coordinate relative to the coordinate (0, 0); the overall Y offset and block Y offset refer to the Y-direction offset of the corresponding upper left corner offset coordinate relative to the coordinate (0, 0); The correction coefficient information includes block number, block X offset, block Y offset, block width, block height, block correction coefficient length, and correction coefficient corresponding to the block after compression; In step 3, the regional offset data M (x, y, w, h) of the selected area in the LED display screen is obtained, and the x, y, x+w, y+h in the regional offset data M (x, y, w, h) are compared with the coordinates of the upper left corner of the LED display screen, and the block X offset, block Y offset, block width and block height of the correction coefficient information corresponding to the selected area in the data frame are calculated to obtain multiple block numbers corresponding to the selected area; and the compressed correction coefficient corresponding to the selected area in the data frame is obtained according to the multiple block numbers; The selected area is a square with a total width of w and a total height of h. x represents the horizontal offset of the upper left corner of the selected area relative to the upper left corner of the LED display screen, y represents the vertical offset of the upper left corner of the selected area relative to the upper left corner of the LED display screen, x+w represents the horizontal offset of the lower right corner of the selected area relative to the upper left corner of the LED display screen, and y+h represents the vertical offset of the lower right corner of the selected area relative to the upper left corner of the LED display screen.

5. A method for quickly updating the correction coefficient of an LED display screen according to claim 4, characterized in that: During compression in step one, the compression module of the compression and decompression library is called to compress the correction coefficient of the original length of the entire LED display screen according to the selected data format, and obtain the correction coefficient of the length of each block correction coefficient after compression; during decompression in step three, the decompression module of the compression and decompression library is called to decompress the correction coefficient of the compressed block correction coefficient length corresponding to the selected area in the data frame according to the specified data format, and obtain the correction coefficient of the decompressed original length.

6. A method for quickly updating the correction coefficient of an LED display screen according to claim 5, characterized in that: After calculating a plurality of block numbers corresponding to the selected area according to the area offset data M (x, y, w, h) of the selected area, the cabinet corresponding to the selected area is determined according to the correspondence between the plurality of block numbers and the cabinets in the LED display screen; By comparing x, y, x+w and y+h with the offset coordinates of the upper left corner of each cabinet corresponding to the selected area, the area range corresponding to the selected area in each cabinet is determined and sent together with the decompressed correction coefficient to the receiving card of the cabinet corresponding to the selected area of ​​the LED display.

7. A device for updating correction coefficients of LED display screen, characterized in that: It includes a correction coefficient acquisition module, a correction coefficient compression module, a correction coefficient storage module, a regional offset data acquisition module, a data frame replacement coefficient region calculation module, a data frame region correction coefficient acquisition module, a correction coefficient decompression module and a correction coefficient delivery module, wherein: The correction coefficient acquisition module acquires the correction coefficient of the entire LED display screen, and the correction coefficient compression module compresses the acquired correction coefficient in a data format corresponding to the correction coefficient according to the actual usage scenario; The correction coefficient storage module stores the compressed correction coefficient in a data frame according to the data format of the region; The regional offset data acquisition module acquires the regional offset data of the selected area in the LED display screen, the data frame replacement coefficient area calculation module calculates the area where the coefficient needs to be replaced in the data frame according to the regional offset data, the data frame regional correction coefficient acquisition module acquires the compressed correction coefficient corresponding to the replacement coefficient area from the data frame, and the correction coefficient decompression module decompresses the compressed correction coefficient corresponding to the replacement coefficient area to obtain the decompressed correction coefficient of the selected area in the LED display screen; The correction coefficient sending module sends the decompressed correction coefficient to the receiving card corresponding to the selected area of ​​the LED display screen to achieve rapid update of the correction coefficient in the area.

8. A LED display screen correction coefficient update system, characterized in that: It includes host computer, receiving card, sending device and LED display screen, including: The host computer is connected to the sending device, and updates the correction coefficient of the LED display screen according to the fast updating method of the correction coefficient of the LED display screen according to any one of claims 1 to 6; The sending device is connected to the receiving card, and is used to send the decompressed correction coefficient obtained by the correction coefficient updating device to the receiving card corresponding to the selected area of ​​the LED display screen; The receiving card is connected to the LED display screen, and is used to receive the decompressed correction coefficients and apply them on the LED display screen.

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