Spliced screen control system and method, display device and computer readable storage medium

Abstract

The invention discloses a spliced screen control system and method, a display device and a computer readable storage medium. According to the embodiment of the invention, the spliced screen control system comprises a plurality of display screen control modules, and each display screen control module comprises a video input interface used for inputting a video signal; the video copying unit is used for receiving the video signals and copying the video signals to obtain multiple paths of output video signals; the video processing unit receives one path of output video signal; the video processing unit is used for processing the received output video signal so as to drive a corresponding display screen; and the at least one video output interface is used for receiving one path of output video signal and sending the received output video signal to the other display screen control module. According to the spliced screen control system and method, the display device and the computer readable storage medium, wiring of the spliced screen can be simplified.

Description

Technical Field

[0001] This invention relates to the field of display control technology, and in particular to a splicing screen control system and method, a display device, and a computer-readable storage medium. Background Technology

[0002] In existing LED display control system technologies, a two-tier architecture is generally used, which is a separate transmitting and receiving approach. In this architecture, the receiving card is usually placed inside the cabinet and connected to the transmitting card via an interface such as a network cable. Standard video sources such as HDMI and DVI are disassembled by the transmitting card and sent to the receiving card via an interface such as Ethernet.

[0003] For existing two-level architectures, due to historical technological reasons, driving LED displays requires specific clock timing. Therefore, a receiving card is needed to output the received image data according to the timing of the LED display driver. This timing process has a very high degree of parallelism and very strict timing coordination, making FPGA architecture technology essentially the only option. Limited by the FPGA's technical architecture, it is difficult to achieve a balance between cost and solution that directly supports standard HDMI or DP video source inputs and provides timing control. Therefore, the common practice is to add a transmitting card device in front, allowing the transmitting card to act as a standard interface video source input such as HDMI. The transmitting card device repackages the HDMI signal input from the standard interface and transmits it to the receiving card via a transmission medium, typically such as Gigabit Ethernet.

[0004] As LED displays are increasingly used in practical applications, their resolutions are getting larger and larger. Screens with resolutions up to 4K are becoming very common. The traditional mode of sending and receiving via gigabit Ethernet is very complex, with wiring being extremely complicated. For example, a 4K resolution screen requires at least 16 network cables, which is a huge problem from both an application and engineering implementation perspective.

[0005] Therefore, there is a need for a new splicing screen control system and method, display device, and computer-readable storage medium that can solve at least one of the above problems. Summary of the Invention

[0006] In view of the above problems, the purpose of this invention is to provide a splicing screen control system and method, a display device, a computer-readable storage medium, and in particular a control system architecture for a freely spliced ​​LED display screen, thereby simplifying the wiring of the splicing screen.

[0007] According to one aspect of the present invention, a splicing screen control system is provided, comprising a plurality of display screen control modules that respectively control different display screens, each of the display screen control modules comprising:

[0008] A video input interface, wherein the video input interface is used to input video signals;

[0009] A video copying unit is connected to the video input interface to receive the video signal and copy the video signal to obtain multiple output video signals.

[0010] A video processing unit, connected to the video copying unit, receives one output video signal from among the multiple output video signals; the video processing unit processes the received output video signal to drive the corresponding display screen.

[0011] At least one video output interface is provided, which is connected to the video copying unit to receive one of the multiple output video signals and send the received output video signal to another display control module.

[0012] Optionally, the video input interface includes a first video input interface and a second video input interface;

[0013] The display screen control module also includes:

[0014] A switching unit is connected to the first video input interface, the second video input interface, and the video copying unit, respectively, to select either the first video input interface or the second video input interface, and to send the selected video signal to the video copying unit.

[0015] The first video input interface and the second video input interface are respectively connected to the video output interfaces of different adjacent display control modules to receive the corresponding output video signals as the video signals input to the first video input interface and the second video input interface.

[0016] Optionally, the display screen control module further includes:

[0017] A communication unit, which is used to establish a communication link with other display screen control modules;

[0018] The control unit is connected to the communication unit and the video processing unit, and is used to communicate with other display screen control modules through the communication link to determine the relative positional relationship between the display screens corresponding to other display screen control modules, and to configure display parameters according to the relative positional relationship.

[0019] Optionally, the communication unit is based on the Universal Asynchronous Receiver / Transmitter Protocol (UAP), and the signal lines of the communication unit are embedded in the reserved pins of the video input interface and the video output interface.

[0020] Optionally, the control unit is configured as follows:

[0021] When the video input interface does not receive a data packet through the communication unit within a preset time, the position of the display screen corresponding to the display screen control module it is in is set to the origin position.

[0022] Optionally, the control unit is configured as follows:

[0023] Based on the relative positional relationship, an Internet Protocol address is assigned to the display control module in which it is located.

[0024] Optionally, the multi-channel output video signal is at least three channels; wherein two of the output video signals are output to display control modules in different physical connection directions.

[0025] Optionally, the multi-channel output video signal of the display control module includes a first output video signal and a second output video signal;

[0026] The first output video signal is output to the display control module of the display screen adjacent to the display screen above the corresponding display screen; the second output video signal is output to the display control module of the display screen adjacent to the display screen to the left of the corresponding display screen; or

[0027] The first output video signal is output to the display control module of the display screen adjacent to the display screen above the display screen; the second output video signal is output to the display control module of the display screen adjacent to the display screen to the right of the display screen; or

[0028] The first output video signal is output to the display control module of the display screen adjacent to the display screen below the display screen; the second output video signal is output to the display control module of the display screen adjacent to the display screen to the left of the display screen; or

[0029] The first output video signal is output to the display control module of the display screen adjacent to the display screen below the display screen; the second output video signal is output to the display control module of the display screen adjacent to the display screen to the right of the display screen.

[0030] According to another aspect of the present invention, a method for controlling a video wall is provided, comprising the following steps:

[0031] Receive video signals;

[0032] The video signal is copied to obtain multiple output video signals;

[0033] One of the multiple output video signals is processed to drive the corresponding display screen;

[0034] One of the multiple output video signals is sent to another display screen.

[0035] Optionally, the video wall control method further includes:

[0036] Communication data packets are transmitted between multiple display control modules via communication links integrated in the video input and video output interfaces.

[0037] Each display screen control module calculates and updates its relative position in the splicing screen, and forwards the communication data packet containing its updated position information to the adjacent display screen control module through the video output interface;

[0038] Each display screen control module configures corresponding display parameters according to its relative position to display images.

[0039] Optionally, the video wall control method further includes:

[0040] Establish a communication link between the displays, the communication link being based on the Universal Asynchronous Receiver / Transmitter Protocol;

[0041] Based on the communication link, the relative positional relationship between each display screen is determined.

[0042] Optionally, the video wall control method further includes:

[0043] Multiple displays are cascaded together, with the position of the first-level display as the origin.

[0044] The higher-level display screen sends its own location information to the lower-level display screen based on the Universal Asynchronous Receiver / Transmitter Protocol.

[0045] The next-level display screen obtains its own position information based on the position information received from the previous-level display screen.

[0046] The next-level display screen obtains its own location information based on the location information received from the previous-level display screen, and then determines whether the obtained location information is consistent with the recorded location information. If the obtained location information is inconsistent with the recorded location information, it corrects its own location and updates the corresponding address.

[0047] Optionally, updating the corresponding address includes:

[0048] Update the corresponding Internet Protocol address.

[0049] According to another aspect of the present invention, a display device is provided, comprising:

[0050] The splicing screen control system described above; and

[0051] Multiple displays, which are spliced ​​together to form a video wall.

[0052] In the splicing screen control system, different display screen control modules control different display screens.

[0053] According to another aspect of the present invention, a computer-readable storage medium is provided having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the splicing screen control method as described above.

[0054] The splicing screen control system and method, display device, and computer-readable storage medium provided by this invention enable the input video signal to be copied and sent to other displays, achieving efficient signal distribution between displays. This eliminates the need for the traditional separate sender and receiver card architecture, simplifies the wiring of the splicing screen system, and reduces hardware costs.

[0055] Furthermore, the video input interface includes a first video input interface and a second video input interface, which can respectively receive video signals provided by different adjacent displays. The switching unit selects one video signal as the input signal of the current display, realizing redundant backup and seamless switching of video signals. When one signal is abnormal, it can automatically switch to another signal input to ensure uninterrupted display and improve the stability and reliability of the system.

[0056] Furthermore, the communication link between the display control modules enables automatic identification of the display screen position and automatic configuration of display parameters, allowing the splicing screen to be displayed without manual intervention, which greatly improves the efficiency of installation and debugging.

[0057] Optionally, video signals are transmitted along a specific direction between adjacent display control modules to form a cascaded transmission structure. Each display control module receives and forwards the video stream in sequence, and automatically calibrates the display area in combination with preset physical arrangement rules to achieve precise alignment and display of spliced ​​images. Attached Figure Description

[0058] The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings, in which:

[0059] Figure 1 A schematic diagram of the splicing screen control system according to Embodiment 1 of the present invention is shown;

[0060] Figure 2 A schematic diagram of the splicing screen control system according to Embodiment 2 of the present invention is shown;

[0061] Figure 3 A schematic diagram illustrating the working principle of the splicing screen control system according to Embodiment 2 of the present invention is shown;

[0062] Figure 4 A flowchart of a splicing screen control method according to Embodiment 3 of the present invention is shown. Detailed Implementation

[0063] Various embodiments of the invention will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by the same or similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale. Furthermore, certain well-known parts may not be shown in the drawings.

[0064] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. Many specific details of the invention, such as the structure, materials, dimensions, processing techniques, and methods of the components, are described below to provide a clearer understanding of the invention. However, as those skilled in the art will understand, the invention may be implemented without following these specific details.

[0065] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0066] Figure 1 A schematic diagram of a video wall control system according to Embodiment 1 of the present invention is shown. (In conjunction with...) Figure 1 As shown, the splicing screen control system according to Embodiment 1 of the present invention includes multiple display screen control modules 10 that control different display screens respectively. Each display screen control module 10 includes a video input interface 100, a video copying unit 300, a video processing unit 400, and a video output interface 500.

[0067] Specifically, the video input interface 100 is used to input video signals, that is, to connect the signal from an external video source to the video wall control system. Optionally, the video signal received by the video input interface 100 is selected from at least one of HDMI 2.0 (High-Definition Multimedia Interface 2.0), DisplayPort, DVI (Digital Visual Interface), etc. Optionally, the video input interface 100 is connected to the video output interface 500 of the display control module 10 of an adjacent display screen to receive the output video signal sent by the display control module 10 (which is the video signal input to the video input interface 100).

[0068] The video copying unit 300 is connected to the video input interface 100 to receive video signals from the video input interface 100 and copy the received video signals to generate multiple (identical) output video signals.

[0069] The video processing unit 400 is connected to the video copying unit 300 to receive one of the multiple output video signals from the video copying unit 300. The video processing unit 400 processes the received output video signal to drive the corresponding display screen. Optionally, the processing performed by the video processing unit 400 includes at least one of video cropping and image scaling, color correction, frame rate conversion, and resolution adaptation. Optionally, the output video signal received by the video processing unit 400 includes image information to be displayed on the display screen corresponding to the video processing unit 400, as well as image information to be displayed on other display screens (e.g., the image information to be displayed on the entire splicing screen). The video processing unit 400 cuts out the image information to be displayed on its corresponding display screen from the received output video signal.

[0070] There is at least one video output interface 500. The video output interface 500 is connected to the video copying unit 300 to receive one of the multiple output video signals and send that output video signal to another display control module. Optionally, there are multiple video output interfaces 500, each receiving one of the multiple output video signals and sending the received output video signal to its corresponding display control module, thus achieving cascading expansion.

[0071] In an alternative embodiment of the present invention, the video input interface 100 includes a first video input interface 110 and a second video input interface 120. The display screen control module further includes a switching unit 200. The switching unit 200 is respectively connected to the first video input interface 110 and the second video input interface 120, and is used to switch the video signal input source between the first video input interface 110 and the second video input interface 120, and output the switched video signal to the video copying unit 300. By setting the dual-channel input interface and the switching unit, the loop backup function is supported, ensuring that when the video signal fails and disconnects, it can be switched in time to ensure the continuous and stable operation of the display system. Optionally, the first video input interface 110 is connected to the video output interface 500 of the display screen control module 10 of an adjacent display screen to receive the output video signal (as the video signal input to the first video input interface 110) sent by the display screen control module 10; the second video input interface 110 is connected to the video output interface of the display screen control module 10 of another adjacent display screen 500 to receive the output video signal (as the video signal input to the second video input interface 120) sent by the display screen control module 10. In a specific embodiment, standard HDMI2.0 input is adopted, 2-channel input is supported, and the loop backup function is supported, making the system control more stable.

[0072] In an alternative embodiment of the present invention, the display screen control module 10 further includes a communication unit and a control unit. The communication unit in one display screen control module 10 is used to establish a communication link with other display screen control modules 10. The control unit is connected to the communication unit and the video processing unit 400, and is used to communicate with other display screen control modules 10 through this communication link to determine the relative position relationship between the display screens corresponding to other display screen control modules 10, and configure display parameters according to this relative position relationship. Configuring display parameters includes, for example, controlling the video processing unit 400 to perform regional rendering and splicing of images to ensure seamless connection of the画面 when multiple screens are linked.

[0073] Optionally, the communication unit is based on the Universal Asynchronous Receiver / Transmitter (UART) protocol. The signal lines of the communication unit are embedded in the reserved pins of the video input interface 100 and the video output interface 500.

[0074] Optionally, the control unit is configured to: when the video input interface 100 does not receive a data packet through the communication unit within a preset time, set the position of the display screen corresponding to the display screen control module 10 where it is located to the origin position.

[0075] Optionally, the control unit is configured to assign an Internet Protocol Address (IP address) to the display control module in which it is located, based on the relative position.

[0076] In an optional embodiment of the present invention, the multiple output video signals are at least three, wherein two output video signals are respectively output to display control modules in different physical connection directions. Optionally, the multiple output video signals of the display control module include a first output video signal and a second output video signal; the first output video signal is output to the display control module of the display screen adjacent to the display screen above the display screen; the second output video signal is output to the display control module of the display screen adjacent to the display screen to the left of the display screen; or the first output video signal is output to the display control module of the display screen adjacent to the display screen above the display screen; the second output video signal is output to the display control module of the display screen adjacent to the display screen to the right of the display screen; or the first output video signal is output to the display control module of the display screen adjacent to the display screen below the display screen; the second output video signal is output to the display control module of the display screen adjacent to the display screen to the left of the display screen; or the first output video signal is output to the display control module of the display screen adjacent to the display screen below the display screen; the second output video signal is output to the display control module of the display screen adjacent to the display screen to the right of the display screen.

[0077] Figure 2 A schematic diagram of the splicing screen control system according to Embodiment 2 of the present invention is shown. Figure 3 A schematic diagram illustrating the working principle of a video wall control system according to Embodiment 2 of the present invention is shown. (Combined with...) Figure 1 , Figure 2 and Figure 3 As shown, the hardware framework of the splicing screen control system according to Embodiment 2 of the present invention includes a switching unit 200, a video copying unit 300, and a video processing unit 400. The switching unit includes... Figure 2 The high-speed switch shown; the video copying unit includes Figure 2 The video repeater shown; the video processing unit includes Figure 2 The video cutting and LED screen control are shown. The hardware architecture of the splicing screen control system according to Embodiment 2 of the present invention enables free splicing.

[0078] Combination Figure 2 and Figure 3As shown, in a specific embodiment of the present invention, two HDMI 2.0 inputs are supported, and the switching selection between the two HDMI 2.0 inputs is also supported. Optionally, for a display control module that controls a single display screen (sponge sub-screen), it receives video signals (HDMI 2.0) sent from the display control module of the adjacent display screen below and from the display control module of the adjacent display screen to the left, and selects the video signal from below or to the left as the input source of the current display screen.

[0079] After receiving the video signal, the video repeater copies the input video signal three times (i.e., obtains multiple output video signals). Optionally, the copied output video signals are sent to different locations: one output video signal is sent to the display control module of the display adjacent to the right side of the display corresponding to the display control module of the video repeater's own display screen; one output video signal is sent to the display control module of the display adjacent above the display corresponding to the display control module of the video repeater's own display screen; and one output video signal is sent to the video processing unit of the display control module of the video repeater's own display screen to perform processing such as segmentation to form a control signal adapted to the display screen of the video repeater's own display screen and drive the display screen to display images.

[0080] Optionally, multiple display screen control modules are cascaded to form a splicing screen control system, enabling cascaded transmission and synchronization of video signals between modules. The output of each video repeater transmits the copied signal to the adjacent display screen control modules on the right and above, respectively, according to a preset direction. Optionally, the video signal maintains consistency (identical content) during cascaded transmission, and maintains timing synchronization and color consistency. (Refer to...) Figure 3 As shown, Figure 3The direction indicated by the middle arrow shows the transmission direction of the video signal from the video output interface of the previous level to the video input interface of the next level. The video signal received by the first-level (or individual) display screen in the lower left corner originates from an external HDMI input source. The received video signal includes the complete image content to be displayed on the entire splicing screen. After being copied by the video repeater, it is transmitted to the right and upward to the adjacent display screen control modules respectively. The displays to the right and above the first display screen in the lower left corner are the second-level displays. After receiving the video signal transmitted from the first-level display screen, they also copy the input signal into three outputs through the built-in video repeater. One output is transmitted to the right, one to the upward for cascading transmission, and the other is sent to the local video processing unit. In this way, each level of display screen control module receives and copies the video signal in sequence. Each display screen control module performs cropping processing on the input video signal according to its own splicing position, displaying only the image portion of the corresponding area. Optionally, each level of display screen control module obtains the same original video signal, or the video signal obtained by the previous level display screen control module includes at least the video signal of the next level.

[0081] Optionally, the display control module also includes an MCU (Microcontroller Unit) for controlling communication between the various display control modules, coordinating the operation of the switching unit, video copying unit, and video processing unit, and synchronizing communication between the various display control modules. The MCU may include, for example, the control unit described above.

[0082] Optionally, the display control module also includes an Ethernet switch for interconnecting network communication between the various display control modules. File configuration, command sending, etc., are achieved through an additional Ethernet connection. The Ethernet switch may include, for example, the communication unit described above. In this embodiment, since the video source uses signal transmission lines such as HDMI, configuration parameters are further cascaded and controlled via Ethernet; through the flattened control of Ethernet, the brightness adjustment of multiple display control units can be synchronized; when a video signal is interrupted, due to the existence of video copying mode and the support for switching video input (supporting loop backup), video backup and recovery can be achieved.

[0083] Optionally, for a single display, unidirectional video input (2 in, 2 out) enables video source backup. The four HDMI ports on a single display need to specify the vertical and horizontal directions. By using the four HDMI directions, two-dimensional coordinates are obtained for automatic splicing, thus achieving automatic layout recognition and splicing without manual intervention. Multiple displays do not require a separate motherboard.

[0084] As described above, the splicing screen control system proposed in this application differs from the traditional two-level architecture, being a single-level architecture integrating transmission and reception. Within the display area, it supports automatic connection of display screens (cabinets) without requiring configuration via host computer software. This application can be considered as constructing an LED display control card capable of freely splicing displays up to 4K resolution. This control card supports standard HDMI 2.0 input and inherently supports loopback functionality. It is not only simple to use and easy to connect, but also supports signal backup, resulting in more stable system control.

[0085] In the above embodiments of this application, combined with Figure 3 As shown, the two HDMI 2.0 inputs and the two HDMI 2.0 outputs are designated as four directions: top, bottom, left, and right. For ease of installation, the two HDMI 2.0 inputs can be designated as left and bottom, and the two HDMI 2.0 outputs as right and top, forming a cascaded connection structure between multiple displays. This achieves seamless extension of video signals in both horizontal and vertical directions. By connecting the HDMI cables between cabinets according to the rule of left-in, bottom-in, right-out, and top-out, the signal flow is clear and the wiring is simple, effectively reducing installation complexity and improving system stability. This architecture supports splicing screen expansion of any scale; and each display has two input signals, namely dual inputs from the adjacent display on the left and below, which can serve as backups for each other. When the signal in one direction is interrupted (e.g., when the signal in one direction is interrupted), the signal will be lost. Figure 3 (As shown by the red cross in the middle), it automatically switches to another signal source, ensuring the continuous operation of the display system.

[0086] Furthermore, to ensure the integrity and display consistency of the spliced ​​image, the inventors proposed a method for determining the relative positions of the displays. This involves establishing communication links between the displays, based on a Universal Asynchronous Receiver / Transmitter Protocol (UART). The relative positional relationships between the displays are then determined based on these communication links. Optionally, multiple displays are cascaded, with the position of the first-level display serving as the origin. The higher-level display sends its own position information to the lower-level display based on UART. The lower-level display obtains its own position information from the received information from the higher-level display. After obtaining its own position information, the lower-level display checks if it matches its recorded position information. If the match is inconsistent, the lower-level display corrects its position and updates its address. Optionally, updating the address includes updating the corresponding (display's) Internet Protocol (IP) address. This orderly transmission of position information between displays ensures accurate acquisition of position information and guarantees that the entire splicing system can automatically identify and calibrate its position when the topology changes or new cabinets are added.

[0087] To obtain the two-dimensional relative topology information for each display (cabinet), a UART signal is required within the HDMI signal cable. The specific solution (algorithm) is as follows:

[0088] The HDMI input and output ports embed UART (Universal Asynchronous Receiver / Transmitter Signal) signals, for example, on pins 13 and 14. Since UART is full-duplex, transmission and reception can be parallel. If no UART packet is received within 10 seconds (a preset time) at two UART input ports, the device will set its (x,y) position to (0,0).

[0089] The MCU software internally records the following information: the status of the HDMI input (no input, left (A-channel input), down (B-channel input); records the current maximum resolution (X,Y), which is {W·(X+1), H·(Y+1)}; and records its own (x,y) information.

[0090] The MCU's return packet path may have two parallel data paths. The subnet mask of the MCU's internal IP address is 255.255.0.0, the network address is 192.168.0.0, and addresses within 192.168.0.10 are reserved for use by routers and other devices. The actual starting address starts from 192.168.0.10. For example, if (x,y)=(1,3), then the IP address is 192.168.3.11.

[0091] The algorithm flow is as follows:

[0092] Step 1: The device with (x, y) = (0, 0) will initiate a UART packet splicing every 2 seconds, sending its own (Xn, Yn) value to the two UART output paths;

[0093] Step 2: After receiving this packet, the next level (display control module) will, according to the HDMI IN port, set its own X(n+1)=Xn+1 or Y(n+1)=Yn+1; at the same time, it will send its latest (x, y) to the next level (display control module) via UART.

[0094] Step 3: If the latest (x, y) value calculated by the current user is inconsistent with the old (x, y) value recorded by the current user, then the corresponding offset position action is performed and the IP address is updated. If they are equal or the current user is processing other services, the current processing packet is discarded and the next packet is waited for.

[0095] Step 4: Each control card (display control module) will execute steps 2 and 3;

[0096] Step 5: When both HDMI IN ports have inputs, prioritize the lower input.

[0097] Step Six: Determine if a next level exists via HPD (High-Definition DisplayPort Signal) or UART query. If no next level exists, after processing, send a return packet. This return packet does not perform any processing on intermediate paths, only forwarding upwards. The card at coordinates (x, y) = (0, 0) receives the packet and retains the maximum X and Y values ​​to obtain the actual maximum (Xmax, Ymax). Since the cabinet resolution can be configured through the actual load of the control card and can be read back, the actual resolution of the screen W = cabinet width · Xmax, H height = cabinet height · Ymax, which gives the actual resolution of the screen (W, H). Based on the above resolution calculation, it can be seen that the solution provided in this application can arbitrarily and freely splice displays within the 4K display resolution range.

[0098] According to another aspect of the present invention, a video wall control method is provided. This video wall control method is used in the video wall control system described above.

[0099] Figure 4 A flowchart of a video wall control method according to Embodiment 3 of the present invention is shown. Figure 4 As shown, the splicing screen control method according to Embodiment 3 of the present invention includes the following steps:

[0100] In step S101, a video signal is received;

[0101] In step S102, the video signal is copied to obtain multiple output video signals;

[0102] In step S103, one of the multiple output video signals is processed to drive the corresponding display screen;

[0103] In step S104, one of the multiple output video signals is sent to another display screen.

[0104] Optionally, the video wall control method also includes:

[0105] Communication data packets are transmitted between multiple display control modules via communication links integrated in the video input and video output interfaces.

[0106] Each display screen control module calculates and updates its relative position in the splicing screen, and forwards the communication data packet containing its updated position information to the adjacent display screen control module through the video output interface;

[0107] Each display screen control module configures corresponding display parameters according to its relative position to display images.

[0108] According to another aspect of the present invention, a display device is provided. The display device includes a splicing screen control system as described above and multiple display screens. Multiple display screens (sponge sub-screens) are spliced ​​together to form a splicing screen. Different display screen control modules in the splicing screen control system control different display screens. Optionally, the display screens include at least one selected from cathode ray tube display panels, digital light processing display panels, liquid crystal display panels, light-emitting diode display panels, organic light-emitting diode display panels, quantum dot display panels, Micro-LED display panels, Mini-LED display panels, field emission display panels, plasma display panels, electrophoretic display panels, and electrowetting display panels.

[0109] According to another aspect of the present invention, a computer-readable storage medium is provided having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the splicing screen control method as described above.

[0110] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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. Without further limitation, 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 said element.

[0111] As described above, these embodiments of the present invention do not exhaustively cover all details, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to effectively utilize the invention and its modifications. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A video wall splicing control system, comprising multiple display screen control modules that control different display screens respectively, each of the display screen control modules comprising: A video input interface, wherein the video input interface is used to input video signals; A video copying unit is connected to the video input interface to receive the video signal and copy the video signal to obtain multiple output video signals. A video processing unit, connected to the video copying unit, is provided to receive one of the multiple output video signals. The video processing unit processes the received output video signal to drive the corresponding display screen; At least one video output interface is provided, which is connected to the video copying unit to receive one of the multiple output video signals and send the received output video signal to another display control module.

2. The splicing screen control system according to claim 1, wherein, The video input interface includes a first video input interface and a second video input interface; The display screen control module also includes: A switching unit is connected to the first video input interface, the second video input interface, and the video copying unit, respectively, to select either the first video input interface or the second video input interface, and to send the selected video signal to the video copying unit. The first video input interface and the second video input interface are respectively connected to the video output interfaces of different adjacent display control modules to receive the corresponding output video signals as the video signals input to the first video input interface and the second video input interface.

3. The splicing screen control system according to claim 1, wherein, The display screen control module also includes: A communication unit, which is used to establish a communication link with other display screen control modules; The control unit is connected to the communication unit and the video processing unit, and is used to communicate with other display screen control modules through the communication link to determine the relative positional relationship between the display screens corresponding to other display screen control modules, and to configure display parameters according to the relative positional relationship.

4. The splicing screen control system according to claim 3, wherein, The communication unit is based on the Universal Asynchronous Receiver / Transmitter Protocol (UAP), and the signal lines of the communication unit are embedded in the reserved pins of the video input interface and the video output interface.

5. The splicing screen control system according to claim 3, wherein, The control unit is configured as follows: When the video input interface does not receive a data packet through the communication unit within a preset time, the position of the display screen corresponding to the display screen control module it is in is set to the origin position.

6. The splicing screen control system according to claim 3, wherein, The control unit is configured as follows: Based on the relative positional relationship, an Internet Protocol address is assigned to the display control module in which it is located.

7. The splicing screen control system according to claim 1, wherein, The multi-channel output video signal is at least three channels; two of the output video signals are respectively output to the display control module in different physical connection directions.

8. The splicing screen control system according to claim 7, wherein, The multi-output video signals of the display screen control module include a first output video signal and a second output video signal; The first output video signal is output to the display control module of the display screen adjacent to the display screen above the corresponding display screen; the second output video signal is output to the display control module of the display screen adjacent to the display screen to the left of the corresponding display screen; or The first output video signal is output to the display control module of the display screen adjacent to the display screen above the display screen; the second output video signal is output to the display control module of the display screen adjacent to the display screen to the right of the display screen; or The first output video signal is output to the display control module of the display screen adjacent to the display screen below the display screen; the second output video signal is output to the display control module of the display screen adjacent to the display screen to the left of the display screen; or The first output video signal is output to the display control module of the display screen adjacent to the display screen below the display screen; the second output video signal is output to the display control module of the display screen adjacent to the display screen to the right of the display screen.

9. A method for controlling a video wall, comprising the following steps: Receive video signals; The video signal is copied to obtain multiple output video signals; One of the multiple output video signals is processed to drive the corresponding display screen; One of the multiple output video signals is sent to another display screen.

10. The splicing screen control method according to claim 9, wherein, The video wall control method also includes: Communication data packets are transmitted between multiple display control modules via communication links integrated in the video input and video output interfaces. Each display screen control module calculates and updates its relative position in the splicing screen, and forwards the communication data packet containing its updated position information to the adjacent display screen control module through the video output interface; Each display screen control module configures corresponding display parameters according to its relative position to display images.

11. The splicing screen control method according to claim 9, wherein, The video wall control method also includes: Establish a communication link between the displays, the communication link being based on the Universal Asynchronous Receiver / Transmitter Protocol; Based on the communication link, the relative positional relationship between each display screen is determined.

12. The splicing screen control method according to claim 9, wherein, The video wall control method also includes: Multiple displays are cascaded together, with the position of the first-level display as the origin. The higher-level display screen sends its own location information to the lower-level display screen based on the Universal Asynchronous Receiver / Transmitter Protocol. The next-level display screen obtains its own position information based on the position information received from the previous-level display screen. The next-level display screen obtains its own location information based on the location information received from the previous-level display screen, and then determines whether the obtained location information is consistent with the recorded location information. If the obtained location information is inconsistent with the recorded location information, it corrects its own location and updates the corresponding address.

13. The splicing screen control method according to claim 12, wherein, The updated corresponding address includes: Update the corresponding Internet Protocol address.

14. A display device, comprising: The splicing screen control system as described in any one of claims 1-8; as well as Multiple displays, which are spliced ​​together to form a video wall. In the splicing screen control system, different display screen control modules control different display screens.

15. A computer-readable storage medium having a computer program stored thereon, wherein, When the computer program is executed by the processor, it implements the splicing screen control method as described in any one of claims 9-13.

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