Correction data transmission method and device, controller and LED display screen system

Abstract

The embodiment of the invention relates to the technical field of display screen correction, and discloses a correction data transmission method and device, a controller and an LED display screen system.The system comprises an upper computer, a sending card and a display screen, the display screen comprises an LED lamp panel, a driver and a receiving card, the driver is connected with the receiving card and the LED lamp panel, and the receiving card is connected with the upper computer. According to the method, the first video transmission channel between the upper computer and the sending card and the second video transmission channel between the sending card and the receiving card are used for transmitting the correction data from the upper computer to the sending card and then transmitting the correction data to the receiving card of the display screen for correction, and due to the adoption of the video transmission channels, the transmission speed is higher, and the correction efficiency is improved. And the transmission efficiency of the correction data is effectively improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of display screen correction, and in particular to a correction data transmission method and device, a controller, and an LED display screen system. Background Art

[0002] With the development of the LED display industry, the integration of LED lamp beads in the display is getting higher and higher. However, due to the current development of chip production technology, packaging technology and other technologies, it is impossible to ensure that the brightness and color of each LED lamp on the display are completely consistent. This leads to the phenomenon that when we weld a large number of LED lamps to form a whole screen, the screen will be full of "pockmarks" when displaying pure colors, and even when modules produced by different batches of lamps are spliced ​​together, the brightness and color of the modules will be inconsistent. In order to achieve a module with completely consistent brightness for all LED lamps, the LED lamp board needs to be calibrated before leaving the factory.

[0003] In the process of implementing the embodiment of the present invention, the inventor found that there are at least the following problems in the above related technologies: In the prior art, the host computer software sends the correction data to the receiving card via the sending card through the command channel, and the ability of this method to transmit data is limited. Assuming a single box with a resolution of 512*512, assuming that the amount of single-pixel correction data is 240 bits, then the correction data size of a box is 512*512*240=62,914,560 bits=7,864,320 Byte. The data is transmitted using the command channel. Generally, the command channel transmits 1KByte per frame. The time required to transmit the correction data of a single box is 7,864,320Byte / 1024=7680 frames. Assuming that the video stream frame rate is 60Hz, the total transmission time is 128s. It is not difficult to see that the transmission time of this scheme is too long, and it takes so long for a single box. For a large number of boxes, the factory's shipping efficiency is greatly reduced. Summary of the invention

[0004] The embodiments of the present application provide a correction data transmission method and device, a controller, and an LED display screen system.

[0005] The purpose of the embodiment of the present invention is achieved through the following technical solutions:

[0006] To solve the above technical problems, in the first aspect, a method for transmitting correction data is provided in an embodiment of the present invention, which is applied to an LED display screen system, wherein the LED display screen system includes a host computer, a sending card and a display screen, wherein the display screen includes an LED light board, a driver and a receiving card, wherein the driver is respectively connected to the receiving card and the LED light board, and the method for transmitting correction data includes: controlling the host computer to send the correction data to the sending card through a first video transmission channel between the host computer and the sending card; controlling the sending card to send the correction data to the receiving card through a second video transmission channel between the sending card and the receiving card.

[0007] In some embodiments, the step of controlling the host computer to send the correction data to the sending card through the first video transmission channel between the host computer and the sending card further includes: dividing the correction data according to the size of a single frame of video to obtain a number of correction data fragments, and controlling the host computer to send the several correction data fragments to the sending card in sequence through the first video transmission channel; the step of controlling the sending card to send the correction data to the receiving card through the second video transmission channel between the sending card and the receiving card further includes: controlling the sending card to send the several correction data fragments to the receiving card in sequence through the second video transmission channel.

[0008] In some embodiments, the method further includes: after the receiving card receives the plurality of correction data segments, controlling the receiving card to splice the plurality of correction data segments and restore them into correction data; and saving the correction data to a local storage medium of the receiving card.

[0009] In some embodiments, the correction data fragments carry serial numbers and check codes, and the step of controlling the receiving card to splice and restore the several correction data fragments into the correction data further includes: controlling the receiving card to verify each correction data fragment according to the check code of each correction data fragment; and controlling the receiving card to splice and restore the several correction data fragments into the correction data according to the serial numbers carried by each correction data fragment after the correction data fragments are verified.

[0010] In some embodiments, the method further includes: controlling the driver to drive the LED light board to perform display calibration on the LED lamp beads on the LED light board based on the calibration data after the LED light board is turned on and stably displays.

[0011] In some embodiments, the method further includes: during the process of performing display calibration on the LED lamp beads on the LED lamp board, driving the driver to display first indication information that the calibration is being performed on the display screen.

[0012] In some embodiments, the method further includes: after display calibration of the LED lamp beads on the LED lamp board is completed, driving the driver to display a second indication message indicating that the calibration is completed on the display screen.

[0013] To solve the above technical problems, in the second aspect, an embodiment of the present invention provides a correction data transmission device, which is applied to an LED display system, wherein the LED display system includes a host computer, a sending card and a display screen, wherein the display screen includes an LED light board, a driver and a receiving card, wherein the driver is connected to the receiving card and the LED light board, respectively, and the correction data transmission device includes: a first sending unit, used to control the host computer to send the correction data to the sending card through a first video transmission channel between the host computer and the sending card; and a second sending unit, used to control the sending card to send the correction data to the receiving card through a second video transmission channel between the sending card and the receiving card.

[0014] To solve the above technical problems, in the third aspect, an embodiment of the present invention provides a controller, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method described in the first aspect above.

[0015] To solve the above technical problems, in a fourth aspect, an embodiment of the present invention provides an LED display screen system, comprising: a controller as described in the third aspect, as well as a host computer, a sending card and a display screen, wherein the display screen comprises an LED light board, a driver and a receiving card, wherein the driver is respectively connected to the receiving card and the LED light board, and the controller is respectively communicatively connected to the host computer, the sending card and the receiving card.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: Different from the prior art, the embodiments of the present invention provide a correction data transmission method and device, a controller, and an LED display screen system, the system comprising a host computer, a sending card, and a display screen, the display screen comprising an LED light board, a driver, and a receiving card, the driver being connected to the receiving card and the LED light board, respectively, the method utilizing a first video transmission channel between the host computer and the sending card, and a second video transmission channel between the sending card and the receiving card, to transmit the correction data from the host computer to the sending card and then to the receiving card of the display screen for correction, due to the use of a video transmission channel, the transmission speed is faster, and the transmission efficiency of the correction data is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements / modules and steps with the same reference numerals in the drawings are represented as similar elements / modules and steps. Unless otherwise specified, the figures in the drawings do not constitute proportional limitations.

[0018] Figure 1 It is a flowchart of a correction data transmission method provided in Embodiment 1 of the present invention;

[0019] Figure 2 It is a structural schematic diagram of an LED display screen system provided by Embodiment 1 and Embodiment 4 of the present invention;

[0020] Figure 3 yes Figure 1 A schematic diagram of a sub-flow chart of step S10 in the correction data transmission method shown;

[0021] Figure 4 is a flow chart of another correction data transmission method provided in the first embodiment of the present invention;

[0022] Figure 5 is a flow chart of another correction data transmission method provided in the first embodiment of the present invention;

[0023] Figure 6 is a structural block diagram of a correction data transmission device provided in Embodiment 2 of the present invention;

[0024] Figure 7 is a structural block diagram of another correction data transmission device provided in Embodiment 2 of the present invention;

[0025] Figure 8 is a schematic diagram of the hardware structure of a controller provided in Embodiment 3 of the present invention;

[0026] Fig. 9 This is a schematic diagram of the hardware structure of an LED display screen system provided by Embodiment 4 of the present invention;

[0027] Figure numerals: 1, LED display screen system; 10, host computer; 20, sending card; 30, display screen; 30A, housing; 31, receiving card; 32, LED light board; 33, driver; 100, controller; 200, transmission device for correction data; 210, first sending unit; 220, second sending unit; 230, storage unit; 240, correction unit. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0029] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] It should be noted that, if there is no conflict, the various features in the embodiments of the present invention can be combined with each other, all within the scope of protection of the present application. In addition, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the flow chart. It should be noted that when an element is described as "connected" to another element, it can be directly connected to the other element, or there can be one or more intermediate elements in between.

[0031] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0032] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] In order to solve the problems of slow transmission speed and low transmission efficiency of correction data from the sending card to the receiving card of the current LED display screen, the embodiments of the present invention provide a correction data transmission method and device, a controller, and an LED display screen system. The method utilizes a first video transmission channel between the host computer and the sending card, and a second video transmission channel between the sending card and the receiving card to transmit the correction data from the host computer to the sending card and then to the receiving card of the display screen for correction. Due to the use of the video transmission channel, the transmission speed is faster, which effectively improves the transmission efficiency of the correction data, thereby improving the factory shipment efficiency.

[0034] Specifically, the embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0035] Embodiment 1

[0036] The present invention provides a method for transmitting calibration data. Figure 1 , which shows a process of a correction data transmission method provided by an embodiment of the present invention, and the correction data transmission method is applied to an LED display screen system, please refer to Figure 2 , which shows the structure of an LED display system 1 provided by an embodiment of the present invention, the LED display system 1 includes a host computer 10, a sending card 20 and a display screen 30, the display screen 30 includes an LED light board 32, a driver 33 and a receiving card 31, the driver 33 is connected to the receiving card 31 and the LED light board 32 respectively, please continue to refer to Figure 1 The correction data transmission method includes but is not limited to the following steps:

[0037] Step S10: controlling the host computer to send the correction data to the sending card through the first video transmission channel between the host computer and the sending card;

[0038] In the embodiment of the present invention, the host computer is a video source end. First, the host computer 10 needs to be controlled to transmit the correction data to the sending card 20 through the first video transmission channel, that is, in a manner similar to screen projection. Among them, the first video transmission channel is a transmission channel between the host computer 10 and the sending card 20 specifically used for transmitting video source or video data or display data. The amount of data that can be transmitted per second is larger than the amount of data that can be transmitted by the instruction channel, which can greatly improve the transmission efficiency of the correction data.

[0039] Specifically, see Figure 3 , which shows Figure 1 A sub-process of step S10 in the correction data transmission method shown in FIG. 1, wherein the step of controlling the host computer to send the correction data to the sending card through the first video transmission channel between the host computer and the sending card further includes:

[0040] Step S11: Segment the correction data according to the size of a single frame of video to obtain a plurality of correction data segments;

[0041] Step S12: controlling the host computer to send the plurality of correction data segments to the sending card in sequence through the first video transmission channel.

[0042] In the embodiment of the present invention, before sending the correction data to the sending card 20, the host computer 10 can also segment the correction data into image data sizes, and then send the segmented correction data segments to the sending card through the first video transmission channel. When segmenting the correction data, preferably, the correction data can be segmented according to the LED lamp beads contained in each box 30A, that is, the correction data corresponding to the LED lamp beads contained in each box 30A can be divided into one or more correction data segments, so that each correction data segment can correspond to one box 30A.

[0043] Step S20: controlling the sending card to send the correction data to the receiving card through the second video transmission channel between the sending card and the receiving card.

[0044] Specifically, the step of controlling the sending card to send the correction data to the receiving card through the second video transmission channel between the sending card and the receiving card further includes: controlling the sending card to sequentially send the plurality of correction data fragments to the receiving card through the second video transmission channel. In the embodiment of the present invention, after the correction data is sent from the host computer 10 to the sending card 20, the correction data is sent from the sending card 20 to the receiving card 31 in each box 30A through the video transmission channel.

[0045] For further information, see Figure 4 , which shows the process of another correction data transmission method provided by an embodiment of the present invention, the method also includes:

[0046] Step S31: after the receiving card receives the plurality of correction data segments, controlling the receiving card to splice the plurality of correction data segments and restore them into correction data;

[0047] Specifically, the serial number and check code carried by the correction data fragment, and the step of controlling the receiving card to splice and restore the several correction data fragments into the correction data further include: controlling the receiving card to verify each correction data fragment according to the check code of each correction data fragment; controlling the receiving card to splice and restore the several correction data fragments into the correction data according to the serial number carried by each correction data fragment after the verification of the correction data fragment passes.

[0048] Step S32: Save the correction data to the local storage medium of the receiving card.

[0049] In the embodiment of the present invention, after receiving the calibration data, the receiving card 31 in each box 30A stores the calibration data locally, and the calibration data can be used to calibrate the LED lamp beads in each box 30A after the LED display screen is turned on and stably displayed. The local storage medium can be a microprocessor or memory in the box 30A, which can be selected according to actual conditions.

[0050] Further, please see Figure 5 , which shows the process of another correction data transmission method provided by an embodiment of the present invention, the method further includes:

[0051] Step S41: Control the driver to drive the LED light board to turn on and stably display, and then perform display calibration on the LED lamp beads on the LED light board based on the calibration data.

[0052] Step S42: During the process of performing display calibration on the LED lamp beads on the LED lamp board, the driver is driven to display first indication information that calibration is being performed on the display screen.

[0053] Step S43: After the display calibration of the LED lamp beads on the LED lamp board is completed, the driver is driven to display a second indication message indicating the completion of the calibration on the display screen.

[0054] In the embodiment of the present invention, as described above, after the receiving card 31 in each box 30A obtains the calibration data and saves the calibration data locally in the box 30A, it waits for the LED display screen to be turned on and work. When the LED display screen is turned on and works for a period of time, after the brightness and chromaticity of the LED lamp beads are stably displayed, the currently turned-on LED lamp beads can be calibrated based on the calibration data, so that each LED lamp bead can be displayed according to the preset brightness, chromaticity, etc. Among them, the first indication information and the second indication information can have the same or different contents, for example, both can include the brightness, chromaticity, whether the calibration is completed, etc. of the LED lamp beads, and can be set according to actual needs, without being restricted to the limitations of the embodiment of the present invention.

[0055] Compared with the prior art, it is also assumed that the resolution of a single box 30A is 512*512, and it is also assumed that the amount of single pixel correction data is 240 bits, then the correction data size of the box is 512*512*240=62,914,560 bits=7,864,320 Byte. In the correction data transmission method adopted in the embodiment of the present invention, the correction data is transmitted by using the video source transmission channel. The single frame image transmission data size is 512*512*24 bits, and the number of images required to transmit the correction data of the single box 30A is 62,914,560 bits / 512*512*24=10 frames. Assuming that the video stream frame rate is 60Hz, the time required for the correction data transmission scheme provided by the embodiment of the present invention is 1 / 6 seconds. Compared with the 128s time required by the existing correction data transmission method, the transmission speed and transmission efficiency have been greatly improved, which can greatly improve the factory's shipping efficiency.

[0056] Embodiment 2

[0057] The present invention provides a correction data transmission device. Figure 6 , which shows a structural block diagram of a correction data transmission device 200 provided in an embodiment of the present invention, the correction data transmission device is applied to an LED display screen system, and the LED display screen system can be Figure 2 The LED display system shown in the figure includes a host computer 10, a sending card 20 and a display screen 30. The display screen 30 includes an LED light board 32, a driver 33 and a receiving card 31. The driver 33 is connected to the receiving card 31 and the LED light board 32 respectively. Please continue to refer to Figure 6 , the correction data transmission device 200 includes: a first sending unit 210 and a second sending unit 220. Further, see Figure 7 , which shows a structural block diagram of another correction data transmission device 200 provided in an embodiment of the present invention. The correction data transmission device 200 also includes: a storage unit 230 and a correction unit 240.

[0058] The first sending unit 210 is used to control the host computer to send the correction data to the sending card through the first video transmission channel between the host computer and the sending card. The first sending unit 210 is also used to divide the correction data into several correction data segments according to the size of a single frame of video, and control the host computer to send the several correction data segments to the sending card in sequence through the first video transmission channel.

[0059] The second sending unit 220 is used to control the sending card to send the correction data to the receiving card through the second video transmission channel between the sending card and the receiving card. The second sending unit 220 is also used to control the sending card to send the plurality of correction data segments to the receiving card in sequence through the second video transmission channel.

[0060] The storage unit 230 is used to control the receiving card to splice and restore the several corrected data fragments into corrected data after the receiving card receives the several corrected data fragments; and save the corrected data in the local storage medium of the receiving card. The correction data fragments carry serial numbers and check codes, and the storage unit 230 is also used to control the receiving card to check each correction data fragment according to the check code of each correction data fragment; control the receiving card to splice and restore the several correction data fragments into corrected data according to the serial numbers carried by each correction data fragment after the correction data fragments are checked.

[0061] The correction unit 240 is used to control the driver to drive the LED light board to perform display correction on the LED lamp beads on the LED light board based on the correction data after the LED light board is turned on and stably displays. The correction unit 240 is also used to drive the driver during the process of performing display correction on the LED lamp beads on the LED light board to display a first indication that the correction is being performed on the display screen. The correction unit 240 is also used to drive the driver after the display correction of the LED lamp beads on the LED light board is completed to display a second indication that the correction is completed on the display screen.

[0062] Embodiment 3

[0063] The present invention also provides a controller, see Figure 8 , which shows that it is possible to execute Figure 1 , Figures 3 to 5 The hardware structure of the controller of the correction data transmission method.

[0064] The controller 100 includes: at least one processor 101; and a memory 102 that is communicatively connected to the at least one processor 101. Figure 8 The memory 102 stores instructions that can be executed by the at least one processor 101, and the instructions are executed by the at least one processor 101 so that the at least one processor 101 can perform the above Figure 1 , Figures 3 to 5 The processor 101 and the memory 102 may be connected via a bus or other means. Figure 8The example of connecting through bus is taken in the following.

[0065] The memory 102 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules corresponding to the correction data transmission method in the embodiment of the present application, for example, Figure 6 to Figure 7 The processor 101 executes various functional applications and data processing of the controller by running the non-volatile software programs, instructions and modules stored in the memory 102, that is, implements the correction data transmission method of the above method embodiment.

[0066] The memory 102 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required by at least one function; the data storage area may store data created according to the use of the transmission device for correction data, etc. In addition, the memory 102 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 102 may optionally include a memory remotely arranged relative to the processor 101, and these remote memories may be connected to the transmission device for correction data via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0067] The one or more modules are stored in the memory 102, and when executed by the one or more processors 101, perform the correction data transmission method in any of the above method embodiments, for example, perform the above described Figure 1 , Figures 3 to 5 Steps to achieve Figure 6 to Figure 7 The functions of each module and unit in it.

[0068] The above-mentioned product can execute the method provided in the embodiment of the present application, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the method provided in the embodiment of the present application.

[0069] The present application also provides a non-volatile computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by one or more processors, for example, to execute the above-described Figure 1 , Figures 3 to 5 Steps to achieve Figure 6 to Figure 7 The functions of each module in.

[0070] The present application also provides a computer program product, including a computer program stored on a non-volatile computer-readable storage medium, wherein the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the correction data transmission method in any of the above method embodiments, for example, executing the above described Figure 1 , Figures 3 to 5 Steps to achieve Figure 6 to Figure 7 The functions of each module in.

[0071] Embodiment 4

[0072] The embodiment of the present invention provides an LED display system 1, please refer to Figure 2 and Fig. 9 ,in, Fig. 9 The hardware structure of an LED display screen system 1 provided by an embodiment of the present invention is shown, and the LED display screen system 1 includes: a controller 100, a host computer 10, a sending card 20 and a display screen 30. The display screen 30 includes an LED light board 32, a driver 33 and a receiving card 31, and the driver 33 is connected to the receiving card 31 and the LED light board 32 respectively, and the controller 100 is connected to the host computer 10, the sending card 20 and the receiving card 31 for communication.

[0073] The controller 100 is the controller 100 described in Example 3, which can execute the correction data transmission method provided in Example 1 of the present invention, and has the correction data transmission device 200 provided in Example 2 of the present invention. Please refer to Examples 1 to 3 and their drawings for details, which will not be described in detail here.

[0074] The host computer 10 is a video source, which can be an electronic device such as a mobile phone, a tablet, a computer, etc., and can be specifically configured according to actual conditions.

[0075] The sending card 20 is used to connect the host computer 10 and the display screen 30, and is used to distribute the correction data and video data from the host computer 10 to the receiving card 31 of each box 30A in the display screen 30. It is a common module in the LED display screen system and will not be described in detail here.

[0076] Please also see Figure 2 and Figure 5The display screen includes a plurality of boxes 30A, the receiving cards 31 and the LED light boards 32 are the same in number as the boxes 30A, the receiving cards 31 and the LED light boards 32 are respectively accommodated in the boxes 30A, the light boards 32 are evenly arranged with LED lamp beads, the LED light boards 32 in the boxes 30A are electrically connected to the receiving cards 31, and the receiving cards 31 in the boxes 30A can control the brightness, chromaticity, etc. displayed by each LED lamp bead in the light board 32, and calibrate the LED lamp beads based on the calibration data.

[0077] The embodiment of the present invention provides a correction data transmission method and device, a controller, and an LED display screen system. The system includes a host computer, a sending card, and a display screen. The display screen includes an LED light board, a driver, and a receiving card. The driver is connected to the receiving card and the LED light board, respectively. The method utilizes a first video transmission channel between the host computer and the sending card, and a second video transmission channel between the sending card and the receiving card to transmit the correction data from the host computer to the sending card and then to the receiving card of the display screen for correction. Due to the use of the video transmission channel, the transmission speed is faster, which effectively improves the transmission efficiency of the correction data.

[0078] It should be noted that the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, and may be located in one place or distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0079] Through the description of the above implementation methods, ordinary technicians in this field can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, it can also be implemented by hardware. Ordinary technicians in this field can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for transmitting correction data, characterized in that: Applied to an LED display screen system, the LED display screen system includes a host computer, a sending card and a display screen, the display screen includes an LED light board, a driver and a receiving card, the driver is connected to the receiving card and the LED light board respectively, and the correction data transmission method includes: Controlling the host computer to send the correction data to the sending card through a first video transmission channel between the host computer and the sending card; The sending card is controlled to send the correction data to the receiving card through a second video transmission channel between the sending card and the receiving card.

2. The correction data transmission method according to claim 1, characterized in that: The step of controlling the host computer to send the correction data to the sending card through the first video transmission channel between the host computer and the sending card further includes: The correction data is divided into several correction data segments according to the size of a single frame of video, Controlling the host computer to send the plurality of correction data segments to the sending card in sequence through the first video transmission channel; The step of controlling the sending card to send the correction data to the receiving card through the second video transmission channel between the sending card and the receiving card further includes: The sending card is controlled to send the plurality of correction data segments to the receiving card in sequence through the second video transmission channel.

3. The correction data transmission method according to claim 2, characterized in that: The method further comprises: After the receiving card receives the plurality of correction data segments, controlling the receiving card to splice the plurality of correction data segments and restore them into correction data; The correction data is saved in a local storage medium of the receiving card.

4. The correction data transmission method according to claim 3, characterized in that: The correction data fragment carries a sequence number and a check code, The step of controlling the receiving card to splice and restore the plurality of correction data fragments into correction data further includes: Controlling the receiving card to verify each correction data segment according to the verification code of each correction data segment; After the correction data fragments are verified, the receiving card is controlled to splice the plurality of correction data fragments and restore them into correction data according to the sequence numbers carried by the correction data fragments.

5. The correction data transmission method according to any one of claims 1 to 4, characterized in that: The method further comprises: After the driver is controlled to drive the LED light board to turn on and stably display, the LED lamp beads on the LED light board are calibrated based on the calibration data.

6. The correction data transmission method according to claim 5, characterized in that: The method further comprises: During the process of performing display calibration on the LED lamp beads on the LED lamp board, the driver is driven to display first indication information that the calibration is being performed on the display screen.

7. The correction data transmission method according to claim 5, characterized in that: The method further comprises: After the display calibration of the LED lamp beads on the LED lamp board is completed, the driver is driven to display a second indication message indicating the completion of the calibration on the display screen.

8. A correction data transmission device, characterized in that: Applied to an LED display screen system, the LED display screen system includes a host computer, a sending card and a display screen, the display screen includes an LED light board, a driver and a receiving card, the driver is connected to the receiving card and the LED light board respectively, and the transmission device of the correction data includes: A first sending unit, used for controlling the host computer to send the correction data to the sending card through a first video transmission channel between the host computer and the sending card; The second sending unit is used to control the sending card to send the correction data to the receiving card through a second video transmission channel between the sending card and the receiving card.

9. A controller, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 7.

10. An LED display screen system, characterized in that: include: The controller as claimed in claim 9, and A host computer, a sending card and a display screen, wherein the display screen includes an LED light board, a driver and a receiving card, the driver is respectively connected to the receiving card and the LED light board, and the controller is respectively connected to the host computer, the sending card and the receiving card for communication.

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