LED automatic screen connection system, LED display device and LED automatic screen connection method

Abstract

The invention discloses an LED automatic screen connection system, an LED display device and an LED automatic screen connection method. The LED automatic screen connection system, the LED display device and the LED automatic screen connection method are applied to a plurality of LED box bodies arranged in an array. Each LED box body comprises a plurality of video interfaces which are respectively arranged at the peripheral edge of the LED box body, each video interface is connected with the adjacent LED box body through a video signal cable, and each video interface is provided with a plurality of pins; and the communication processing module is connected with a plurality of specified pins in each video interface, and establishes a communication link with the communication processing module of the adjacent LED box body through a corresponding signal line in the video signal cable. The communication processing modules of the LED box bodies communicate with each other through the communication link to establish an adjacency relation, and the physical positions of the LED box bodies in the array are calculated according to the adjacency relation. The communication link is established by multiplexing the specified pin of the video interface on the LED box body so as to automatically identify the physical position, so that additional wiring is avoided, and the circuit area and cost are saved.

Description

Technical Field

[0001] This application relates to the field of LED display technology, specifically to an automatic LED screen connection system, an LED display device, and an automatic LED screen connection method. Background Technology

[0002] With the rapid development of LED displays towards higher resolution, higher refresh rates, and modularity, they are increasingly widely used in various mobile terminals and electronic devices, and even serve as an important medium for urban landscapes and advertising. When used in outdoor advertising, performance stages, and other similar scenarios, larger LED displays are required. In such cases, screen splicing is often employed, combining multiple smaller LED displays into a larger spliced ​​screen. This necessitates manual assembly of the LED cabinets, ensuring that each cabinet is connected via the correct signal transmission links, and that each cabinet's corresponding smaller LED display correctly displays its respective area. This allows the large spliced ​​screen to display a complete image, i.e., enabling screen cascading.

[0003] Currently, multi-cabinet spliced ​​screens require manual setup of the arrangement and corresponding display area of ​​each LED cabinet. During installation, the cabinets are placed according to the pre-defined arrangement. However, manual operation easily leads to confusion and incorrect placement, resulting in display errors. Therefore, many large-screen applications no longer pre-define the fixed positions of the LED cabinets. Instead, after the individual LED cabinets are assembled, peripheral devices are used to identify their positions. This requires additional communication cables, dedicated signal transceivers or interfaces, etc., making the installation or operation process complex, limiting the connection methods between LED cabinets, increasing wiring difficulty, and limiting scalability. Summary of the Invention

[0004] This application provides an automatic LED screen linking system, an LED display device, and an automatic LED screen linking method to solve the problems in the prior art.

[0005] According to one aspect of the present invention, an automatic LED screen interconnection system is provided, comprising a plurality of LED cabinets arranged in an array, wherein each LED cabinet includes: a plurality of video interfaces located at the four edges of the LED cabinet and connected to adjacent LED cabinets via a video signal cable, each video interface having a plurality of pins; and a communication processing module connected to a plurality of designated pins of each video interface, establishing a communication link with the communication processing module of the adjacent LED cabinet via corresponding signal lines in the video signal cable, wherein the communication processing modules of each LED cabinet communicate with each other via the communication link to establish an adjacency relationship, and calculate the physical position of each LED cabinet in the array based on the adjacency relationship.

[0006] Optionally, the video interface transmits video signals via the video signal cable, and the designated pin is an idle pin not occupied by the video signal.

[0007] Optionally, each LED cabinet is provided with video interfaces in four directions: top, bottom, left, and right. The left and bottom interfaces serve as signal input terminals, and the right and top interfaces serve as signal output terminals, forming a two-input, two-output communication path. After power-on, each LED cabinet identifies its adjacency relationship by the transmission direction of the communication path with its surrounding LED cabinets, thereby constructing the overall two-dimensional topology of the array and determining the mapping relationship between its own physical position and the partitioned screen of the display.

[0008] Optionally, when each LED box identifies its adjacency relationship based on the transmission direction of the communication path between them, the starting LED box is located by the set transmission relationship and set as the origin of the coordinate system. The remaining LED boxes derive their two-dimensional coordinate positions in the array step by step according to the transmission direction of the communication path between them and the origin.

[0009] Optionally, the starting LED box is the LED box corresponding to any corner position in the array, and the set transmission relationship includes: a communication path with only two inputs, a communication path with only two outputs, or a communication path with only one unidirectional input and one unidirectional output.

[0010] Optionally, each LED cabinet further includes a control module connected to multiple dedicated pins in each video interface for transmitting video signals. The control module obtains the mapping relationship between the physical position of its corresponding LED cabinet and the partitioned screen of the overall display screen, and drives the corresponding display unit to display the partitioned screen according to the mapping relationship.

[0011] Optionally, the video interface is a high-definition video interface, the video signal cable is a high-definition video signal cable, and the communication processing module communicates via the communication link using a serial communication protocol, which includes a general asynchronous communication protocol and a serial peripheral interface communication protocol.

[0012] Optionally, each LED cabinet further includes a storage module that stores the mapping relationship between the physical location of the LED cabinet and the corresponding partition screen. The storage module is a non-volatile storage unit. The control module directly calls the mapping relationship to complete the partition screen display each time it receives the video signal.

[0013] According to another aspect of the present invention, an LED display device is provided, comprising: an LED display screen including a plurality of display units; and the aforementioned automatic LED screen connection system including a plurality of LED cabinets, wherein each of the LED cabinets is correspondingly connected to and drives one of the display units.

[0014] According to another aspect of the present invention, an automatic LED screen connection method is provided, applied to multiple LED cabinets arranged in an array, wherein each LED cabinet includes multiple video interfaces distributed around its perimeter, each connected to an adjacent LED cabinet via a video signal cable. The automatic LED screen connection method includes: establishing a communication link between adjacent LED cabinets through signal lines in each video signal cable corresponding to several designated pins of the video interface; each LED cabinet communicating with each other via the communication link after power-on to identify their adjacency relationship; calculating the physical position of each LED cabinet in the array based on the adjacency relationship; and establishing a mapping relationship between the physical position of each LED cabinet and the partitioned display screen.

[0015] Optionally, each LED cabinet is provided with video interfaces in the four directions of top, bottom, left, and right. After being powered on, each LED cabinet communicates with each other via communication links. The step of identifying the adjacency relationship between each LED cabinet includes: for each LED cabinet, the left and bottom interfaces are set as signal input terminals, and the right and top interfaces are set as signal output terminals; the adjacency relationship between each LED cabinet is determined according to the transmission direction of the communication path between each LED cabinet.

[0016] Optionally, the step of calculating the physical position of each LED box in the array based on the adjacency relationship includes: locating the starting LED box through a set transmission relationship and setting it as the origin of the coordinate system; the remaining LED boxes, starting from the starting LED box, derive their two-dimensional coordinate positions in the overall array step by step according to the adjacency relationship, wherein the starting LED box is the LED box corresponding to any corner position in the array, and the transmission direction of the communication path of the corner position where the starting LED box is located is set as the set transmission relationship.

[0017] Optionally, the automatic LED screen connection method further includes: storing the mapping relationship between the physical location of the LED cabinet and the corresponding partition screen; after each power-on and receiving the video signal, directly obtaining the mapping relationship, driving the corresponding display unit to display the partition screen, and realizing automatic screen connection.

[0018] The LED automatic screen linking system, LED display device, and LED automatic screen linking method provided by this invention are applicable to LED cabinets arranged in multiple arrays and interconnected via video signal cables. Correspondingly, each LED cabinet includes multiple video interfaces. By multiplexing several designated pins of each video interface, a communication link is established between the LED cabinets via the corresponding signal lines of the connected video signal cables. During the screen linking operation after power-on, mutual communication is completed via the communication link to determine the physical position of each LED cabinet according to the transmission direction, thus mapping the physical position of the LED cabinet to the partition screen to be displayed. Therefore, no additional communication cables or transceiver modules are required; only existing video communication cables are needed to complete automatic coordinate recognition and screen linking operations, reducing wiring complexity. Simultaneously, it does not affect the subsequent transmission of video signals, significantly reducing the cost and area of ​​the LED display device. It also enables the system to identify the adjacency relationship between each LED cabinet and automatically identify coordinates upon power-on, achieving "plug and play," shortening display time, improving efficiency, and providing diverse connection methods for the LED cabinets.

[0019] Furthermore, the video interface includes dedicated pins for transmitting video signals and designated pins for establishing communication links. These designated pins are unused pins not occupied by video signals. This separates communication and video transmission, ensuring that communication and screen-sharing operations are not affected regardless of whether video signal transmission has started, thus further guaranteeing the accuracy of automatic screen-sharing operations.

[0020] Furthermore, all LED cabinets uniformly adopt a left-in, right-out, bottom-in, top-out communication path transmission direction. Therefore, the adjacency relationship between corresponding LED cabinets can be determined based on the signal transmission direction during communication, thereby completing the two-dimensional topology assembly and identifying the physical location of each LED cabinet. This method involves low computational load and high speed, enabling rapid automatic LED screen connection operations and improving the stability of the display. It also significantly reduces manual configuration workload and improves installation efficiency.

[0021] Furthermore, an initial LED cabinet can be selected, possessing a specific transmission relationship. This initial LED cabinet can be located based on the established transmission relationship, and its coordinates can be used as the origin to deduce the coordinates of other LED cabinets sequentially based on their adjacency relationships. Selecting the initial LED cabinet at any corner of the array allows for better utilization of the two-in-two-out communication path, sequentially obtaining the two-dimensional coordinates of each LED cabinet. This makes the mapping between the physical location of the LED cabinets and the partitioned display more accurate, and the two-in-two-out communication path also ensures the stability and reliability of the cascaded structure. Additionally, the mapping relationship can be stored in the non-volatile storage unit of the LED cabinet, ensuring data integrity during power outages. Furthermore, upon each power-on, the coordinates do not need to be re-identified; the mapping relationship can be directly retrieved for partitioned display, improving convenience.

[0022] It should be noted that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0023] Figure 1 A schematic structural diagram of an LED display device and an automatic LED screen linkage system according to an embodiment of the present invention is shown; Figure 2 A schematic structural diagram of an LED housing according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of two-dimensional coordinates corresponding to each LED cabinet in an automatic LED screen interconnection system according to an embodiment of the present invention is shown. Figure 4 A schematic flowchart of an automatic LED screen linkage method according to an embodiment of the present invention is shown. Detailed Implementation

[0024] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in various forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0025] Figure 1 A schematic structural diagram of an LED display device and an automatic LED screen linkage system according to an embodiment of the present invention is shown.

[0026] like Figure 1 As shown, the LED display device 10 in this embodiment includes an LED display screen 100, an LED automatic screen connection system 200, and a video source 300. The LED display screen 100 is a large screen assembled from multiple displays, including multiple sequentially connected display units 110 arranged in an array. The LED automatic screen connection system 200 corresponds to multiple LED cabinets 210 arranged in an array, and each LED cabinet 210 is connected to adjacent LED cabinets 210 via video signal cables 220 around its perimeter. Each LED cabinet 210 is connected to and drives one display unit 210 (only the connection between the display units 110 in the upper left and upper right corners and the LED cabinets 210 is shown in the figure, but in reality, each display unit 110 is connected to its corresponding LED cabinet 210). That is, the display units 210 and LED cabinets 210 are connected one-to-one, and the multiple LED cabinets 210 are also arranged in an array. In this embodiment, a 3×4 array is used as an example for explanation, but in actual applications, it can be flexibly expanded according to display requirements.

[0027] The video source 300 is connected to any LED cabinet 210 via a signal cable, inputting the video signal to the LED automatic screen-connecting system 200. Using the LED cabinet 210 as the initial input point, the video signal is parsed and forwarded, sequentially transmitted to adjacent LED cabinets 210 via video signal cables 220 through a preset transmission path, achieving cascaded signal distribution. Each LED cabinet 210, upon receiving the video signal, parses the signal and drives the corresponding display unit 110 to display the image. However, the LED display screen 100 is composed of multiple independent display units 210. To ensure the continuous and complete display of the entire LED display screen 100, each LED cabinet 210 must know its row and column coordinates in the array and accordingly extract the data corresponding to the partition image it needs to display from the video signal. That is, a mapping relationship must be established between the physical position of each LED cabinet 210 and the partition image of the overall display screen to be displayed for complete and correct screen-connecting operation. To this end, the present invention achieves automatic identification of the physical location of the LED cabinet 210 through the LED automatic screen connection system 200, and establishes a communication link between each LED cabinet by reusing the specified pins in the video interface, and uses the existing video signal cable 220 for communication. This allows for automatic identification and positioning between LED cabinets without adding extra cables or changing the structure and installation method of the LED cabinet.

[0028] Furthermore, in Figure 1 In the middle, each LED cabinet 210 is connected to video communication cables 220 in the four directions of top, bottom, left, and right, so there will be four corresponding video interfaces. Figure 1(Not shown). For each LED cabinet 210, signals are input from the left and output from the right, or input from the bottom and output from the top, forming a bidirectional transmission in both the horizontal and vertical directions. Each LED cabinet 210 transmits signals in this two-input, two-output manner, ensuring that video signals and communication data can be cascaded and transmitted horizontally and vertically. This two-input, two-output transmission method effectively achieves a data transmission backup function; if one path fails, the other can continue transmission, ensuring the stability of the cascade. If we number the LED box 210 in the lower left corner as M1, and the LED boxes 210 above and to its right as M2 and M3 respectively, and so on, then the LED box 210 above M2 is numbered M4, the LED box 210 above M3 is numbered M5, the LED box 210 to the right of M3 is numbered M6, the LED box 210 above M5 is numbered M7, the LED box 210 above M6 is numbered M8, the LED box 210 to the right of M6 is numbered M9, the LED box 210 above M8 is numbered M10, the LED box 210 above M9 is numbered M11, and the LED box 210 to the right of M10 is numbered M12. Then, if a fault occurs in the transmission path to the left of M5, the signal can continue to be input to M5 via M3.

[0029] Furthermore, the entire LED display screen 100 is divided into multiple partitioned screens according to the array arrangement of the display units 110. For example, in order from left to right and from top to bottom, the four display units 110 in the first row correspond to partitioned screens Q1, Q2, Q3, and Q4 respectively; similarly, the four display units in the second row correspond to partitioned screens Q5, Q6, Q7, and Q8, and the third row corresponds to Q9 to Q12. The LED automatic screen linking system 200 of this embodiment can establish a one-to-one mapping relationship between each partitioned screen and its corresponding display unit 110 and LED cabinet 210. For example, the display unit 110 corresponding to LED cabinet 210 numbered M1 displays partitioned screen Q9, while the display unit 110 corresponding to LED cabinet 210 numbered M5 displays partitioned screen Q6, and so on. Further details are omitted here. The following is combined with… Figures 2-4 This application provides a detailed description of the LED automatic screen linking system and method.

[0030] Figure 2 A schematic structural diagram of an LED cabinet according to an embodiment of the present invention is shown.

[0031] The LED automatic screen connection system 200 of this embodiment includes multiple LED cabinets 210 arranged in an array, and each LED cabinet 210 has the same structure. Figure 2 The structure of each LED cabinet 210 is clearly shown, as follows: Figure 2 As shown, each LED cabinet 210 includes multiple video interfaces 211, located around the perimeter of the LED cabinet 210 and connected to adjacent LED cabinets 210 via a video signal cable 220. For example, four video interfaces 211 are distributed along the top, bottom, left, and right edges of the LED cabinet 210, used for video signal transmission between adjacent LED cabinets. Each video interface 211 has multiple pins, and correspondingly, each video signal cable 220 has multiple matching signal lines. These signal lines are connected one-to-one with the multiple used pins on the video interface 211, transmitting signals in the direction indicated by the arrows in the diagram. That is, the left and bottom interfaces serve as signal input terminals, and the right and top interfaces serve as signal output terminals, forming a two-input, two-output communication path. Specifically, each video interface 211 has multiple dedicated pins 2111 for transmitting video signals. Furthermore, several designated pins 2112 among the multiple pins of each video interface 211 are used for communication.

[0032] Each LED cabinet 210 is also equipped with a corresponding communication processing module 212, located inside the LED cabinet 210. This module can be positioned in the middle of multiple video interfaces 211, connected to several designated pins 2112 of each video interface 211. Communication links are established with the communication processing modules 212 of adjacent LED cabinets 210 via corresponding signal lines in the video signal cable 220. Thus, the communication processing modules 212 of each LED cabinet 210 can communicate with each other via these communication links, establish adjacency relationships based on signal transmission direction, and calculate the physical position of each LED cabinet 210 in the array based on these adjacency relationships. Therefore, in this embodiment, during the screen connection phase after power-on, communication and automatic identification of LED cabinet positions are performed through the designated pins 2112 of the video interface 211. After screen connection is completed, the video interface 211 continues to transmit video signals. By reusing the designated pins of the video interface 211, communication functions can be achieved without the need for additional communication cables or additional communication transceiver modules, effectively reducing system complexity and wiring costs.

[0033] In practical applications, a high-definition video interface is typically used as video interface 211. When video interface 211 is a high-definition video interface, video signal cable 220 is also a high-definition video signal cable, primarily used for transmitting video signals. However, some pins of the high-definition video interface are not actually used in LED applications, thus creating space for reuse. Therefore, designated pin 2112 can be any unused pin among the multiple pins of video interface 211 that is not occupied by video signals. Thus, dedicated pin 2111 and designated pin 2112 are independent of each other; dedicated pin 2111 is used for transmitting video signals, while designated pin 2112 is used for communication. In this embodiment, for example, two unused pins can be selected as designated pin 2112 for communication. These two unused pins are typically not used in LED display applications, so they can be stably reused for communication links between cabinets. In addition, the communication processing module 212 communicates via a communication link using serial communication protocols, including UART (Universal Asynchronous Receiver / Transmitter) and SPI (Serial Peripheral Interface). In this embodiment, the various LED housings 210 can communicate with each other via two designated pins 2112 using the UART communication protocol.

[0034] Furthermore, after power-on, each LED cabinet 210 identifies its adjacency relationship by the transmission direction of the communication path with its surrounding LED cabinets 210, thereby constructing the overall two-dimensional topology of the array and determining the mapping relationship between its own physical position and the partitioned screen of the display. For example, when LED cabinet 210 numbered M1 confirms that it only has communication paths to the right and top, it can be determined that it is located in the lower left corner of the array. Then, the adjacent upper LED cabinet 210 can determine that it is located above the lower left corner. In this way, by transmitting and comparing adjacency information step by step, each LED cabinet can autonomously deduce its relative position in the entire display array and complete the topology construction. Therefore, when each LED cabinet 210 identifies its adjacency relationship based on the transmission direction of the communication path between them, it can preferably select an initial LED cabinet to start the step-by-step transmission. Thus, by pre-setting, an LED cabinet with a certain specific transmission relationship can be used as the starting LED cabinet. Subsequently, during the communication process, each LED box 210 can locate the starting LED box through the set transmission relationship and set it as the origin of the coordinate system. The remaining LED boxes will then deduce their two-dimensional coordinate positions in the array step by step according to the transmission direction of the communication path between them and the origin.

[0035] Combination Figure 1 and Figure 2The starting LED cabinet can be selected from any corner of the array, such as the lower left or upper right corner. The configured transmission relationships include: a communication path with only two inputs, a communication path with only two outputs, or a communication path with only one unidirectional input and one unidirectional output. Specifically, for example, when the transmission relationship is set to have only two output communication paths, the system will identify the lower left LED cabinet as the starting LED cabinet because it only has communication paths to the right and top in the array, meeting the two-output setting condition. Conversely, when the transmission relationship is set to have only two input communication paths, the system will identify the upper right LED cabinet as the starting LED cabinet. When the transmission relationship is set to have only one unidirectional input and one unidirectional output, the transmission direction can also be set separately. For example, when the transmission relationship is set to have only one unidirectional input at the bottom and one unidirectional output at the right, the system will identify the LED box in the upper left corner as the starting LED box; while when it is set to one unidirectional output at the top and one unidirectional input at the left, the system will identify the LED box in the lower right corner as the starting LED box.

[0036] By setting the input-output relationships of different communication paths as the basis for identifying the starting LED cabinet, the system can flexibly adapt to various array layouts and installation scenarios without relying on external positioning equipment or manual configuration. Each LED cabinet automatically completes adjacency recognition and topology construction after power-on.

[0037] Figure 3 A schematic diagram of two-dimensional coordinates corresponding to each LED cabinet in an automatic LED screen system according to an embodiment of the present invention is shown.

[0038] Combination Figures 1-3 Taking the LED cabinet in the lower left corner as the starting cabinet as an example, after locating this LED cabinet according to the set transmission relationship, it is initialized with the coordinate origin (0, 0). The adjacent cabinets to its right and above it increase their coordinates along the positive X and Y axes, respectively. Therefore, the LED cabinet numbered M1 corresponds to coordinates (0, 0), M3 is to its right with coordinates (1, 0), M2 is above M1 with coordinates (0, 1), M5 is above M3 with coordinates (1, 1), and so on, gradually deriving the two-dimensional coordinates of the remaining LED cabinets. After completing topology recognition, each LED cabinet automatically allocates a display screen partition according to the preset communication path direction, thus completing the mapping relationship between the physical location of the LED cabinet and the display screen partition, achieving seamless splicing and synchronous display. This process requires no manual intervention, effectively improving installation efficiency and reducing the risk of configuration errors.

[0039] Furthermore, the LED cabinet 210 also includes a control module 213, which is connected to multiple dedicated pins 2111 in each video interface 211 for transmitting video signals. The control module 213 receives video signals, obtains the mapping relationship between the physical position of its corresponding LED cabinet and the partitioned screen of the overall display, and parses the video signal according to the mapping relationship, thereby driving the corresponding display unit 110 to display its respective partitioned screen. In addition, the LED cabinet 210 may also include a storage module to store the mapping relationship between the physical position of the LED cabinet and the corresponding partitioned screen. This storage module is preferably a non-volatile memory unit. Thus, only one screen connection operation is needed after power-on to obtain and store the mapping relationship. Afterwards, the stored mapping relationship can be directly called upon when the system is powered on again. Therefore, the control module 213 can directly call the mapping relationship to complete the partitioned screen display each time a video signal is received. There is no need to repeatedly perform topology recognition and coordinate calculation, significantly shortening the system startup time.

[0040] This solution fully utilizes the idle pins of the high-definition video interface to conduct horizontal and vertical communication between LED cabinets using a pre-defined communication protocol, avoiding additional wiring and ensuring video transmission quality while facilitating control signal exchange between cabinets. Simultaneously, the communication processing module automatically establishes connections with adjacent LED cabinets (up, down, left, and right) via communication links after power-on, identifies their adjacency relationships, performs real-time analysis and coordinate derivation of these relationships, and automatically configures the screen splicing area. This allows the system to automatically adapt to changes in the m×n matrix layout, enabling rapid and automatic splicing of LED displays, improving installation efficiency and reducing manual operation.

[0041] Figure 4 A schematic flowchart of an automatic LED screen linkage method according to an embodiment of the present invention is shown.

[0042] like Figure 4 As shown, the LED automatic screen connection method in this embodiment is applicable to the above-mentioned Figures 1-3 The LED display device 10 and the automatic LED screen linking system 200 mentioned in the embodiment. The automatic LED screen linking system 200 includes multiple LED cabinets 210 arranged in an array. Each LED cabinet 210 includes multiple video interfaces 211 located on its top, bottom, left, and right edges, and each is connected to an adjacent LED cabinet 210 via a video signal cable 220. The automatic LED screen linking method in this embodiment specifically includes steps S101-S104.

[0043] In step S101, a communication link between adjacent LED cabinets is established by connecting signal lines in each video signal cable to several designated pins of the video interface.

[0044] In step S102, after being powered on, each LED box communicates with each other via a communication link to identify their adjacency relationship.

[0045] This step specifically includes: for each LED box, the left and lower interfaces are set as signal input terminals, and the right and upper interfaces are set as signal output terminals; the adjacency relationship between each LED box is determined according to the transmission direction of the communication path between each LED box.

[0046] In step S103, the physical position of each LED box in the array is calculated based on the adjacency relationship.

[0047] This step specifically includes: locating the starting LED box using the established transmission relationship and setting it as the origin; the remaining LED boxes, starting from the starting LED box, derive their two-dimensional coordinate positions in the overall array level by level based on their adjacency relationships. The starting LED box is the LED box corresponding to any corner position in the array, and the transmission direction of the communication path at the corner position where the starting LED box is located is set to the established transmission relationship.

[0048] In step S104, a mapping relationship is established between the physical location of each LED box and the partitioned display screen.

[0049] Furthermore, the LED automatic screen connection method in this embodiment also includes: storing the mapping relationship between the physical location of the LED cabinet and the corresponding partition screen; after each power-on and receiving a video signal, directly obtaining the mapping relationship, driving the corresponding display unit to display the partition screen, and realizing automatic screen connection.

[0050] Since the functions and relationships of each module have already been described in the above embodiments, they will not be repeated here. The automatic LED screen connection method can be implemented based on the working principles described in the above embodiments.

[0051] It should be noted that the numerical values ​​in this article are for illustrative purposes only. Other numerical values ​​may be used to implement this solution in other embodiments of the present invention. The specific values ​​should be reasonably set according to the actual situation, and the present invention does not limit them.

[0052] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

[0053] It should also be understood that the terminology and expressions used herein are for descriptive purposes only, and one or more embodiments described herein should not be limited to these terms and expressions. The use of these terms and expressions does not exclude any illustrative and descriptive equivalent features (or parts thereof), and it should be recognized that various modifications that may exist should also be included within the scope of the claims. Other modifications, variations, and substitutions may also exist. Accordingly, the claims should be considered to cover all such equivalents.

Claims

1. An automatic LED screen interconnection system, comprising multiple LED cabinets arranged in an array, wherein, Each of the aforementioned LED enclosures includes: Multiple video interfaces are located around the perimeter of the LED enclosure, each connected to an adjacent LED enclosure via a video signal cable. Each video interface has multiple pins. The communication processing module is connected to several designated pins in each of the video interfaces, and establishes a communication link with the communication processing module of the adjacent LED cabinet via the corresponding signal lines in the video signal cable. The communication processing modules of each LED box communicate with each other via the communication link to establish an adjacency relationship, and calculate the physical position of each LED box in the array based on the adjacency relationship.

2. The LED automatic screen linkage system according to claim 1, wherein, The video interface transmits video signals via the video signal cable, and the designated pin is a free pin that is not occupied by the video signal.

3. The LED automatic screen linkage system according to claim 1, wherein, Each of the LED cabinets is provided with video interfaces in the four directions of top, bottom, left, and right. The left and bottom interfaces serve as signal input terminals, while the right and top interfaces serve as signal output terminals, forming a two-input, two-output communication path. Furthermore, after power-on, each LED cabinet identifies its adjacency relationship by the transmission direction of the communication path between it and the surrounding LED cabinets, thereby constructing the overall two-dimensional topology of the array and determining the mapping relationship between its own physical location and the partitioned screen of the display.

4. The LED automatic screen linkage system according to claim 3, wherein, When each LED box identifies its adjacency relationship based on the transmission direction of the communication path between them, it locates the starting LED box through the set transmission relationship and sets it as the origin of the coordinate system. The remaining LED boxes then deduce their two-dimensional coordinate positions in the array step by step according to the transmission direction of the communication path between them and the origin.

5. The LED automatic screen linkage system according to claim 4, wherein, The starting LED box is the LED box corresponding to any corner position in the array. The set transmission relationship includes: a communication path with only two inputs, a communication path with only two outputs, or a communication path with only one unidirectional input and one unidirectional output.

6. The LED automatic screen linkage system according to claim 1 or 2, wherein, Each of the LED enclosures also includes: The control module is connected to multiple dedicated pins in each of the video interfaces for transmitting video signals. The control module obtains the mapping relationship between the physical position of its corresponding LED cabinet and the partitioned screen of the overall display screen, and drives the corresponding display unit to display the partitioned screen according to the mapping relationship.

7. The LED automatic screen linkage system according to claim 1, wherein, The video interface is a high-definition video interface, the video signal cable is a high-definition video signal cable, and the communication processing module communicates via the communication link using a serial communication protocol, which includes a general asynchronous transceiver communication protocol and a serial peripheral interface communication protocol.

8. The LED automatic screen linkage system according to claim 6, wherein, Each of the LED enclosures also includes: The storage module stores the mapping relationship between the physical location of the LED cabinet and the corresponding partition screen. The storage module is a non-volatile storage unit. The control module directly calls the mapping relationship to complete the partition screen display each time it receives the video signal.

9. An LED display device, comprising: LED display screen, comprising multiple display units; as well as The LED automatic screen linkage system as described in any one of claims 1-8 includes multiple LED cabinets. Each of the LED boxes is connected to and drives one of the display units.

10. An automatic LED screen interconnection method, applied to multiple LED cabinets arranged in an array, wherein, Each LED cabinet includes multiple video interfaces located around its four edges, each connected to an adjacent LED cabinet via a video signal cable. The automatic LED screen connection method includes: A communication link is established between adjacent LED cabinets by connecting signal lines in each video signal cable to several designated pins of the video interface. After being powered on, each LED box communicates with each other via communication links to identify their adjacency relationships; The physical position of each LED cabinet in the array is calculated based on the adjacency relationship; and Establish a mapping relationship between the physical location of each LED cabinet and the partitioned display screen.

11. The LED automatic screen connection method according to claim 10, wherein, Each LED cabinet is equipped with video interfaces in four directions: top, bottom, left, and right. After power-on, each LED cabinet communicates with each other via communication links. The steps for identifying their adjacency relationships include: For each LED cabinet, the left and lower interfaces are configured as signal input terminals, and the right and upper interfaces are configured as signal output terminals. The adjacency relationship between each LED box is determined based on the transmission direction of the communication path between each LED box.

12. The LED automatic screen connection method according to claim 11, wherein, The steps for calculating the physical location of each LED cabinet in the array based on the adjacency relationship include: The starting LED box is located by establishing the transmission relationship, and it is set as the origin of the coordinate system. Starting from the initial LED box, the remaining LED boxes derive their two-dimensional coordinate positions in the overall array step by step based on the adjacency relationship. The starting LED box is the LED box corresponding to any corner position in the array, and the transmission direction of the communication path at the corner position of the starting LED box is set as the predetermined transmission relationship.

13. The LED automatic screen connection method according to claim 10 further includes: Store the mapping relationship between the physical location of the LED cabinet and the corresponding partition screen; Upon receiving the video signal each time the device is powered on, the mapping relationship is directly obtained, and the corresponding display unit is driven to display the partition screen, thereby achieving automatic screen connection.

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