LED display control system and LED display screen

Abstract

This utility model discloses an LED display control system and an LED display screen, belonging to the field of LED display screen control technology. The LED display control system includes a video server, a host computer, a sending card, and a receiving card, which are sequentially connected in communication. The video server sends a frame rate information packet corresponding to the frame rate of the video source to be played to the host computer. The host computer receives the frame rate information packet, generates a channel rate configuration data packet corresponding to the frame rate information packet, and sends it to the sending card. The sending card receives the channel rate configuration data packet, switches its transmission rate with the receiving card to the target transmission rate corresponding to the channel rate configuration data packet, and transmits the channel rate configuration data packet to the receiving card. The receiving card receives the channel rate configuration data packet, switches its transmission rate to the target transmission rate corresponding to the channel rate configuration data packet, and communicates with the sending card through the target transmission rate. This system can dynamically adjust the target transmission rate between the sending card and the receiving card according to the frame rate of the video source to be played, meeting the requirements of high frame rate video playback.

Description

Technical Field

[0001] This utility model relates to the field of LED display control technology, specifically to an LED display control system and an LED display screen. Background Technology

[0002] Currently, in high frame rate applications such as cinemas, for example, at 120fps, increasing the number of channels on the Integrated Board (IB) to meet this high frame rate requirement—for example, increasing the original 8 channels to 16 channels—poses significant challenges to the hardware resources of the sending card, the connection between the sending and receiving cards, and the screen wiring. Therefore, a new LED display control solution that can meet the requirements of high frame rate video playback is urgently needed. Utility Model Content

[0003] In view of this, the purpose of this utility model embodiment is to provide an LED display control system and an LED display screen to meet the requirements of high frame rate video playback.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0005] According to one aspect of the present invention, an LED display control system is provided, the LED display control system comprising a video server, a host computer, a sending card and a receiving card that are sequentially and communicatively connected.

[0006] The video server is used to store video sources and send frame rate information packets corresponding to the frame rate of the video source to be played to the host computer.

[0007] The host computer is used to receive the frame rate information packet, generate a channel rate configuration data packet corresponding to the frame rate information packet, and send the channel rate configuration data packet to the sending card.

[0008] The transmitting card is used to receive the channel rate configuration data packet, switch the transmission rate between itself and the receiving card to the target transmission rate corresponding to the channel rate configuration data packet, and transmit the channel rate configuration data packet to the receiving card.

[0009] The receiving card is used to receive the channel rate configuration data packet, switch its own transmission rate to the target transmission rate corresponding to the channel rate configuration data packet, and communicate with the sending card through the target transmission rate.

[0010] Optionally, the host computer includes a third storage module for storing a single-channel rate information table, which includes corresponding information on different single-channel data rates, frame rates, and channel bandwidth codes.

[0011] Optionally, the channel rate configuration data packet includes a field synchronization frame, and generating the channel rate configuration data packet corresponding to the frame rate information packet includes:

[0012] Based on the single-channel rate information table, a channel bandwidth code corresponding to the frame rate contained in the frame rate information packet is generated, and the channel bandwidth code is used as part of the field synchronization frame.

[0013] Optionally, the transmitting card includes a first receiving and parsing module, a first storage module, and a first channel rate management module;

[0014] The first receiving and parsing module is used to receive and parse the channel rate configuration data packet;

[0015] The first storage module is used to store a single-channel rate information table;

[0016] The first channel rate management module is used to obtain the target transmission rate corresponding to the channel rate configuration data packet based on the parsing result of the first receiving and parsing module on the channel rate configuration data packet and the stored single channel rate information table, and switch the transmission rate between itself and the receiving card to the target transmission rate.

[0017] Optionally, the receiving card includes a second receiving and parsing module, a second storage module, and a second channel rate management module;

[0018] The second receiving and parsing module is used to receive and parse the channel rate configuration data packet;

[0019] The second storage module is used to store a single-channel rate information table;

[0020] The second channel rate management module is used to obtain the target transmission rate corresponding to the channel rate configuration data packet based on the parsing result of the second receiving and parsing module on the channel rate configuration data packet and the stored single channel rate information table, and switch its own transmission rate to the target transmission rate.

[0021] Optionally, the number of sending cards can be one or more. When the number of sending cards is multiple, the multiple sending cards are cascaded. The sending card is also used to transmit the channel rate configuration data packet to the next sending card cascaded with it, until the last sending card.

[0022] Optionally, there are multiple receiving cards, which are divided into multiple receiving card groups. The multiple receiving cards in each receiving card group are cascaded together, and the first receiving card in each receiving card group is connected to a data channel of the sending card in a one-to-one communication connection. The receiving card is also used to transmit the channel rate configuration data packet to the next receiving card connected to it in the cascade, until the last receiving card in the group.

[0023] Optionally, each receiving card group and its connected sending card form a single channel corresponding to a data channel.

[0024] Optionally, the receiving card further includes a rate polling module, which is used to configure the single-channel data rate in the single-channel rate information table one by one.

[0025] According to another aspect of the present invention, an LED display screen is provided, which includes the above-described LED display control system.

[0026] The LED display control system and LED display screen provided in this embodiment of the invention include a video server, a host computer, a sending card, and a receiving card connected in sequence. The video server stores video sources and sends frame rate information packets corresponding to the frame rate of the video source to be played to the host computer. The host computer receives the frame rate information packets, generates a channel rate configuration data packet corresponding to the frame rate information packets, and sends the channel rate configuration data packet to the sending card. The sending card receives the channel rate configuration data packet, switches its transmission rate with the receiving card to a target transmission rate corresponding to the channel rate configuration data packet, and transmits the channel rate configuration data packet to the receiving card. The receiving card receives the channel rate configuration data packet, switches its transmission rate to the target transmission rate corresponding to the channel rate configuration data packet, and communicates with the sending card through the target transmission rate. This LED display control system, through the cooperation of the video server, host computer, sending card, and receiving card, can dynamically adjust the target transmission rate between the sending card and the receiving card according to the frame rate of the video source to be played, thereby meeting the requirements for high frame rate video playback. Furthermore, when the frame rate of the video source to be played is low, the LED display control system promptly reduces the target transmission rate between the sending card and the receiving card, which can shorten the high-speed communication time between the sending card and the receiving card, thus improving the reliability of the display control system to a certain extent. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0028] Figure 1This is a schematic diagram of a structure of an LED display control system provided in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of a sending card provided in an embodiment of the present utility model;

[0030] Figure 3 This is a schematic diagram of a receiving card provided in an embodiment of the present utility model;

[0031] Figure 4 This is another structural schematic diagram of the LED display control system provided in this embodiment of the utility model;

[0032] Figure 5 This is another structural schematic diagram of the receiving card provided in this embodiment of the utility model;

[0033] Figure 6 This is a schematic diagram of the structure of an LED display screen provided in an embodiment of this utility model. Detailed Implementation

[0034] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0035] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0036] Example 1

[0037] To meet the current demand for high frame rate video playback, this embodiment provides an LED display control system 10. Please refer to [reference needed]. Figure 1 , Figure 1 This is a schematic diagram of an LED display control system provided in an embodiment of the present invention. The LED display control system 10 includes a video server 101, a host computer 102, a sending card 103, and a receiving card 104 that are connected in sequence for communication.

[0038] The video server 101 is used to store video sources and send frame rate information packets corresponding to the frame rate of the video source to be played to the host computer 102.

[0039] The host computer 102 is used to receive the frame rate information packet, generate a channel rate configuration data packet corresponding to the frame rate information packet, and send the channel rate configuration data packet to the sending card 103.

[0040] The transmitting card 103 is used to receive the channel rate configuration data packet, switch the transmission rate between itself and the receiving card 104 to the target transmission rate corresponding to the channel rate configuration data packet, and transmit the channel rate configuration data packet to the receiving card 104.

[0041] The receiving card 104 is used to receive the channel rate configuration data packet, switch its own transmission rate to the target transmission rate corresponding to the channel rate configuration data packet, and communicate with the sending card 103 through the target transmission rate.

[0042] Specifically, the LED display control system 10 includes a video server 101, a host computer 102, a sending card 103, and a receiving card 104, which are connected in sequence. The video server 101 sends a frame rate information packet corresponding to the frame rate of the video source to be played to the host computer 102. The host computer 102 receives the frame rate information packet, generates a channel rate configuration data packet corresponding to the frame rate information packet, and sends the channel rate configuration data packet to the sending card 103. The sending card 103 receives the channel rate configuration data packet, switches its transmission rate with the receiving card 104 to the target transmission rate corresponding to the channel rate configuration data packet, and transmits the channel rate configuration data packet to the receiving card 104. The receiving card 104 receives the channel rate configuration data packet, switches its own transmission rate to the target transmission rate corresponding to the channel rate configuration data packet, and communicates with the sending card 103 through the target transmission rate. The LED display control system 10, through the cooperation of the video server 101, the host computer 102, the transmitting card 103, and the receiving card 104, can dynamically adjust the target transmission rate between the transmitting card 103 and the receiving card 104 according to the frame rate of the video source to be played. Thus, when the frame rate of the video source to be played is high, the transmission rate between the transmitting card 103 and the receiving card 104 is adjusted accordingly to match the high frame rate, thereby meeting the requirements for high frame rate video playback. Furthermore, when the frame rate of the video source to be played is low, the LED display control system 10 promptly reduces the target transmission rate between the transmitting card 103 and the receiving card 104. This shortens the high-speed communication time between the transmitting card 103 and the receiving card 104, thereby improving the reliability of the display control system to a certain extent. The channel rate configuration data packet can be a field synchronization frame or other forms; this embodiment does not limit its specific form, as long as it includes information related to the transmission rate between the transmitting card 103 and the receiving card 104 corresponding to the frame rate of the video source to be played.

[0043] In one embodiment, the host computer 102 includes a third storage module (not shown in the figure), which is used to store a single-channel rate information table. The single-channel rate information table includes the corresponding information of different single-channel data rates, frame rates, and channel bandwidth codes.

[0044] In this embodiment, the single-channel rate information table includes the corresponding information of different single-channel data rates, frame rates, and channel bandwidth codes. The host computer 102 generates a channel rate configuration data packet corresponding to the frame rate information packet based on this single-channel rate information table. Taking video source frame rates of 120fps, 96fps, 60fps, and 24fps / 48fps as examples, the single-channel rate information table is shown in Table 1. In Table 1, the single-channel data rate corresponding to a frame rate of 120fps is 10Gbps, and the corresponding channel bandwidth code is 00; the single-channel data rate corresponding to a frame rate of 96fps is 8Gbps, and the corresponding channel bandwidth code is 01; the single-channel data rate corresponding to a frame rate of 60fps is 6.25Gbps, and the corresponding channel bandwidth code is 10; the single-channel data rate corresponding to a frame rate of 24fps / 48fps is 5Gbps, and the corresponding channel bandwidth code is 11. The host computer 102 generates a channel rate configuration data packet corresponding to the frame rate contained in the frame rate information packet according to Table 1. The channel rate configuration data packet includes the channel bandwidth code and / or single channel data rate corresponding to the frame rate contained in the frame rate information packet. For example, if the frame rate corresponding to the frame rate information packet is 120fps, a channel rate configuration data packet including channel bandwidth code 00 and / or single channel data rate of 10Gbps is generated. If the frame rate corresponding to the frame rate information packet is 24fps or 48fps, a channel rate configuration data packet including channel bandwidth code 11 and / or single channel data rate of 5Gbps is generated.

[0045] Single channel data rate Frame rate Channel bandwidth code 10Gbps 120fps 00 8Gbps 96fps 01 6.25Gbps 60fps 10 5Gbps 24 / 48fps 11

[0046] Table 1: Single Channel Rate Information Table

[0047] In one embodiment, the channel rate configuration data packet includes a field synchronization frame, and generating the channel rate configuration data packet corresponding to the frame rate information packet includes: generating a channel bandwidth code corresponding to the frame rate contained in the frame rate information packet according to the single channel rate information table, and using the channel bandwidth code as part of the field synchronization frame.

[0048] In this embodiment, the channel rate configuration data packet includes a field synchronization frame. The host computer 102 generates a channel bandwidth code corresponding to the frame rate contained in the frame rate information packet according to Table 1. The channel bandwidth code is used as part of the field synchronization frame and transmitted along with the field synchronization frame to the sending card 103 and the receiving card 104. This allows the sending card 103 and the receiving card 104 to switch their own transmission rate according to the channel bandwidth code in the field synchronization frame. For example, if the frame rate corresponding to the frame rate information packet is 96fps, a corresponding channel bandwidth code 01 is generated. The channel bandwidth code 01 is used as part of the field synchronization frame and transmitted along with the field synchronization frame to the sending card 103 and the receiving card 104. This allows the sending card 103 and the receiving card 104 to read the channel bandwidth code 01 in the field synchronization frame and switch their own transmission rate to 8Gbps corresponding to the channel bandwidth code 01. In this way, the transmission rate between the sending card 103 and the receiving card 104 switches according to the frame rate of the video source to be played. For example, if the channel bandwidth code is used as Byte 10 of the field synchronization frame, the corresponding field synchronization frame structure is shown in Table 2. In Table 2, BW represents the channel bandwidth code, and the information corresponding to the other bytes is shown in Table 3.

[0049]

[0050] Table 2: Field Synchronization Frame Structure Table

[0051] symbol name describe Code coding Value: 0x00 HACT effective line length Number of rows of pixels VACT Column effective length Column pixel count FMT Format Color space and sampling rate information LTC Linear time code Frame count BW Channel bandwidth code Channel communication bandwidth configuration CRC reserve CRC16 check

[0052] Table 3: Information corresponding to each byte of the field synchronization frame

[0053] In one implementation, please refer to Figure 2 , Figure 2 This is a schematic diagram of a transmitting card provided in an embodiment of the present invention. The transmitting card 103 includes a first receiving and parsing module 1031, a first storage module 1032, and a first channel rate management module 1033;

[0054] The first receiving and parsing module 1031 is used to receive and parse the channel rate configuration data packet;

[0055] The first storage module 1032 is used to store a single-channel rate information table;

[0056] The first channel rate management module 1033 is used to obtain the target transmission rate corresponding to the channel rate configuration data packet based on the parsing result of the first receiving and parsing module 1031 on the channel rate configuration data packet and the stored single channel rate information table, and switch the transmission rate between itself and the receiving card 104 to the target transmission rate.

[0057] In this embodiment, the first receiving and parsing module 1031 of the transmitting card 103 receives and parses the channel rate configuration data packet, the first storage module 1032 stores a single channel rate information table, and the first channel rate management module 1033 obtains the target transmission rate corresponding to the channel rate configuration data packet based on the parsing result of the first receiving and parsing module 1031 on the channel rate configuration data packet and the stored single channel rate information table, and switches the transmission rate between itself and the receiving card 104 to the target transmission rate, thereby completing the adaptive adjustment of the transmission rate between itself and the receiving card 104 and the frame rate of the video source to be played.

[0058] In one implementation, please refer to Figure 3 , Figure 3 This is a schematic diagram of a receiving card provided in an embodiment of the present invention. The receiving card 104 includes a second receiving and parsing module 1041, a second storage module 1042, and a second channel rate management module 1043;

[0059] The second receiving and parsing module 1041 is used to receive and parse the channel rate configuration data packet;

[0060] The second storage module 1042 is used to store a single-channel rate information table;

[0061] The second channel rate management module 1043 is used to obtain the target transmission rate corresponding to the channel rate configuration data packet based on the parsing result of the second receiving and parsing module 1041 on the channel rate configuration data packet and the stored single channel rate information table, and switch its own transmission rate to the target transmission rate.

[0062] In this embodiment, the second receiving and parsing module 1041 of the receiving card 104 receives and parses the channel rate configuration data packet, the second storage module 1042 stores a single channel rate information table, and the second channel rate management module 1043 obtains the target transmission rate corresponding to the channel rate configuration data packet based on the parsing result of the second receiving and parsing module 1041 on the channel rate configuration data packet and the stored single channel rate information table, and switches its own transmission rate to the target transmission rate to complete the adaptive adjustment of its own transmission rate and the frame rate of the video source to be played.

[0063] In one embodiment, the number of sending cards 103 is one or more. When the number of sending cards 103 is multiple, the multiple sending cards 103 are cascaded. The sending card 103 is also used to transmit the channel rate configuration data packet to the next sending card 103 cascaded with it, until the last sending card 103.

[0064] In this embodiment, there are one or more sending cards 103. When there are multiple sending cards 103, the multiple sending cards 103 are cascaded. The sending card 103 is also used to transmit the channel rate configuration data packet to the next sending card 103 connected to it in the cascade, until the last sending card 103, so that the transmission rate of all sending cards 103 is adaptively adjusted according to the frame rate of the video source to be played.

[0065] In one implementation, please refer to Figure 4 , Figure 4 This is another structural schematic diagram of the LED display control system provided in this embodiment of the utility model. There are multiple receiving cards 104, which are divided into multiple receiving card groups. The multiple receiving cards 104 within each receiving card group are cascaded together. The first receiving card 104 in each receiving card group is connected to a data channel of the sending card 103 in a one-to-one communication connection. The receiving card 104 is also used to transmit the channel rate configuration data packet to the next receiving card 104 cascaded with it, until the last receiving card 104 in the group.

[0066] In this embodiment, there are multiple receiving cards 104, which are divided into multiple receiving card groups. The multiple receiving cards 104 within each receiving card group are cascaded together. The first receiving card 104 in each receiving card group is connected to a data channel of a transmitting card 103. Each receiving card group and its connected transmitting card 103 data channel form a single channel, through which video-related data is transmitted. The receiving card 104 is also used to transmit the channel rate configuration data packet to the next cascaded receiving card 104, up to the last receiving card 104 in the group, so that the transmission rate of all receiving cards 104 adaptively adjusts according to the frame rate of the video source to be played.

[0067] In one implementation, please refer to Figure 5 , Figure 5 This is another structural schematic diagram of the receiver card provided in this embodiment of the utility model. The receiver card 104 also includes a rate polling module 1044, which is used to configure the single-channel data rate in the single-channel rate information table one by one.

[0068] In this embodiment, if the receiving card 104 is repeatedly plugged in and out, the re-plugged receiving card 104 configures the single-channel data rate in Table 1 one by one through the rate polling module 1044 until it receives the channel rate configuration data packet sent by the sending card 103. Based on the channel rate configuration data packet, it switches its own transmission rate to complete the adaptive adjustment of its own transmission rate and the frame rate of the video source to be played.

[0069] Taking the video server 101 as a cinema server, the channel rate configuration data packet as a field synchronization frame, and the frame rates of the video source as 120fps, 96fps, 60fps, and 24fps / 48fps respectively, the correspondence between different single-channel data rates, frame rates, and channel bandwidth codes is shown in Table 1. For example, after power-on, both the sending card 103 and the receiving card 104 start at the same rate, and by default start at the lowest rate of 5Gbps. When the cinema server loads and plays a 24 / 48fps film, the cinema server sends a frame rate information packet to the host computer 102. The host computer 102 first synchronizes the field of the sending card 103. The BW value in the frame is modified to 0x11, and then sent level by level to each receiving card 104 in each channel. After receiving the field synchronization frame, the transmitting card 103 and each receiving card 104 set their respective transmission rates to 5Gbps. When the cinema server loads and plays a 60fps film, the cinema server sends frame rate information packets to the host computer 102. The host computer 102 first modifies the BW value in the field synchronization frame of the transmitting card 103 to 0x10, and then sends it level by level to each receiving card 104 in each channel. After receiving the field synchronization frame, the transmitting card 103 and each receiving card 104 set their respective transmission rates to 6.25Gbps. When the cinema server loads and plays a 96fps film, it sends frame rate information packets to the host computer 102. The host computer 102 first modifies the BW value in the field synchronization frame of the transmitting card 103 to 0x01, and then sends it sequentially to each receiving card 104 on each channel. After receiving the field synchronization frame, the transmitting card 103 and each receiving card 104 set their respective transmission rates to 6.25Gbps. The transmission rate between cards 104 is 8Gbps, and each receiving card 104 sets its own transmission rate to 8Gbps. When the cinema server loads and plays a 120fps film, it sends a frame rate information packet to the host computer 102. The host computer 102 first modifies the BW value in the field synchronization frame of the sending card 103 to 0x00, and then sends it step by step to each receiving card 104 on each channel. After receiving the field synchronization frame, the sending card 103 sets its own transmission rate with the receiving card 104 to 10Gbps, and the receiving card 104 sets its own transmission rate to 10Gbps. In this way, the target transmission rate between the sending card 103 and the receiving card 104 can be dynamically adjusted according to the frame rate of the video source to be played.

[0070] The LED display control system 10 in this embodiment includes a video server 101, a host computer 102, a sending card 103, and a receiving card 104 connected in sequence. The video server 101 is used to store video sources and send frame rate information packets corresponding to the frame rate of the video source to be played to the host computer 102. The host computer 102 is used to receive the frame rate information packets, generate a channel rate configuration data packet corresponding to the frame rate information packets, and send the channel rate configuration data packet to the sending card 103. The sending card 103 is used to receive the channel rate configuration data packet, switch its own transmission rate with the receiving card 104 to the target transmission rate corresponding to the channel rate configuration data packet, and transmit the channel rate configuration data packet to the receiving card 104. The receiving card 104 is used to receive the channel rate configuration data packet, switch its own transmission rate to the target transmission rate corresponding to the channel rate configuration data packet, and communicate with the sending card 103 through the target transmission rate. The LED display control system 10, through the cooperation of the video server 101, the host computer 102, the transmitting card 103, and the receiving card 104, can dynamically adjust the target transmission rate between the transmitting card 103 and the receiving card 104 according to the frame rate of the video source to be played, thereby meeting the requirements of high frame rate video playback. Furthermore, when the frame rate of the video source to be played is low, the LED display control system 10 promptly reduces the target transmission rate between the transmitting card 103 and the receiving card 104, which can shorten the high-speed communication time between the transmitting card 103 and the receiving card 104, thus improving the reliability of the display control system to a certain extent.

[0071] Example 2

[0072] This embodiment provides an LED display screen 1. Please refer to [reference needed]. Figure 6 , Figure 6 This is a schematic diagram of an LED display screen provided in an embodiment of the present invention. The LED display screen 1 includes the LED display control system 10 as described in Embodiment 1. Using this LED display screen 1, the target transmission rate between the sending card 103 and the receiving card 104 can be dynamically adjusted according to the frame rate of the video source to be played, thereby meeting the requirements for high frame rate video playback. Furthermore, when the frame rate of the video source to be played is low, the LED display screen 1 promptly reduces the target transmission rate between the sending card 103 and the receiving card 104, which can shorten the high-speed communication time between the sending card 103 and the receiving card 104, thus improving the reliability of the display screen to a certain extent.

[0073] The specific structure of the LED display control system 10 is as described in Embodiment 1 above, and will not be repeated here.

[0074] The corresponding technical features in the above embodiments can be used in combination without causing contradictions or making the solutions unfeasible.

[0075] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0076] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0077] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. An LED display control system, characterized in that, The LED display control system includes a video server, a host computer, a sending card, and a receiving card that are connected in sequence via communication. The video server is used to store video sources and send frame rate information packets corresponding to the frame rate of the video source to be played to the host computer. The host computer is used to receive the frame rate information packet, generate a channel rate configuration data packet corresponding to the frame rate information packet, and send the channel rate configuration data packet to the sending card. The transmitting card is used to receive the channel rate configuration data packet, switch the transmission rate between itself and the receiving card to the target transmission rate corresponding to the channel rate configuration data packet, and transmit the channel rate configuration data packet to the receiving card. The receiving card is used to receive the channel rate configuration data packet, switch its own transmission rate to the target transmission rate corresponding to the channel rate configuration data packet, and communicate with the sending card through the target transmission rate.

2. The LED display control system according to claim 1, characterized in that, The host computer includes a third storage module, which is used to store a single-channel rate information table. The single-channel rate information table includes the corresponding information of different single-channel data rates, frame rates, and channel bandwidth codes.

3. The LED display control system according to claim 2, characterized in that, The channel rate configuration data packet includes a field synchronization frame, and generating the channel rate configuration data packet corresponding to the frame rate information packet includes: Based on the single-channel rate information table, a channel bandwidth code corresponding to the frame rate contained in the frame rate information packet is generated, and the channel bandwidth code is used as part of the field synchronization frame.

4. The LED display control system according to any one of claims 1-3, characterized in that, The transmitting card includes a first receiving and parsing module, a first storage module, and a first channel rate management module; The first receiving and parsing module is used to receive and parse the channel rate configuration data packet; The first storage module is used to store a single-channel rate information table; The first channel rate management module is used to obtain the target transmission rate corresponding to the channel rate configuration data packet based on the parsing result of the first receiving and parsing module on the channel rate configuration data packet and the stored single channel rate information table, and switch the transmission rate between itself and the receiving card to the target transmission rate.

5. The LED display control system according to any one of claims 1-3, characterized in that, The receiving card includes a second receiving and parsing module, a second storage module, and a second channel rate management module; The second receiving and parsing module is used to receive and parse the channel rate configuration data packet; The second storage module is used to store a single-channel rate information table; The second channel rate management module is used to obtain the target transmission rate corresponding to the channel rate configuration data packet based on the parsing result of the second receiving and parsing module on the channel rate configuration data packet and the stored single channel rate information table, and switch its own transmission rate to the target transmission rate.

6. The LED display control system according to any one of claims 1-3, characterized in that, The number of sending cards can be one or more. When there are multiple sending cards, the multiple sending cards are cascaded. The sending card is also used to transmit the channel rate configuration data packet to the next sending card cascaded with it, until the last sending card.

7. The LED display control system according to any one of claims 1-3, characterized in that, The number of receiving cards is multiple, and the multiple receiving cards are divided into multiple receiving card groups. The multiple receiving cards in each receiving card group are cascaded, and the first receiving card in each receiving card group is connected to a data channel of the sending card in a one-to-one communication connection. The receiving card is also used to transmit the channel rate configuration data packet to the next receiving card connected to it in the cascade, until the last receiving card in the group.

8. The LED display control system according to claim 7, characterized in that, Each receiving card group corresponds to a data channel of the sending card connected to it, forming a single channel.

9. The LED display control system according to claim 5, characterized in that, The receiving card also includes a rate polling module, which is used to configure the single-channel data rate in the single-channel rate information table one by one.

10. An LED display screen, characterized in that, The LED display screen includes the LED display control system as described in any one of claims 1-9.

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