LED display unit and display equipment

Abstract

The invention discloses an LED display unit and display equipment, and belongs to the technical field of display equipment, the LED display unit comprises a mounting frame and a plurality of LED display modules, the plurality of LED display modules are transversely arranged on the mounting frame and combined to display pictures, the back surfaces of the LED display modules are connected with the mounting frame through magnetic attraction, and the LED display modules are connected with the mounting frame through magnetic attraction. The installation frame is provided with an alternating-current power supply device used for being connected with an external power supply, the LED display modules are provided with direct-current power supply devices used for supplying power to the LED display modules, and the alternating-current power supply device is electrically connected to the direct-current power supply devices of the LED display modules. The alternating-current power supply device on the mounting frame supplies power to the direct-current power supply devices of the LED display modules, so that the wiring workload is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of display device technology, and more particularly to an LED display unit and display device. Background Technology

[0002] Currently, LED floor tile displays on the market are spliced ​​together from multiple LED display units. Each LED display unit is equipped with a sub-display screen, a power supply device, and a display controller. During the splicing process of LED floor tile displays, installation and maintenance personnel not only need to connect the cabinets of two adjacent LED display units, but also need to connect the power supply devices and display controllers of each LED display unit one by one, which makes the splicing process of the display screen cumbersome and consumes a lot of time. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the purpose of this invention is to provide an LED display unit to solve the problem of cumbersome splicing steps in the current LED floor tile display screen.

[0004] The objective of this invention is achieved through the following technical solution: An LED display unit includes a mounting frame and multiple LED display modules; Multiple LED display modules are arranged in an array on the mounting frame. Each LED display module has a front and a back, and the back of the LED display module is magnetically attached to the mounting frame. The mounting frame is provided with an AC power supply device for connecting to an external power source, and the LED display module is provided with a DC power supply device for supplying power to it. The AC power supply device is electrically connected to the DC power supply devices of the multiple LED display modules respectively.

[0005] Preferably, the back side of the LED display module and / or the mounting frame are provided with magnetic components, and the back side of the LED display module and the mounting frame are connected by magnetic attraction of the magnetic components.

[0006] Preferably, it further includes a first electrical box, in which the AC power supply device is disposed, the first electrical box is detachably connected to the mounting frame, and the first electrical box is disposed opposite to the back of the LED display module.

[0007] Preferably, the back of the LED display module is provided with a second electrical box having a second maintenance port, the second maintenance port being aligned with the orientation of the back of the LED display module, and the DC power supply device being disposed inside the second electrical box.

[0008] Preferably, the back of the LED display module is provided with a mounting bracket, and the mounting bracket is connected to the mounting frame by magnetic attraction; the mounting bracket is provided with multiple hollow structures arranged in a matrix.

[0009] Preferably, the mounting frame has connecting holes extending through both sides thereon, and a connector is movably inserted into the connecting holes; the end of the connector is used for plugging into the connecting holes of other mounting frames.

[0010] Preferably, the connecting hole is provided with a limiting block having a limiting end face, and the connecting member is provided with a limiting ring; When the end of the connector is inserted into the connecting hole of another mounting frame, the limiting ring abuts against the limiting end face.

[0011] Preferably, it further includes an elastic element, one end of which is connected to the mounting frame, and the other end of which is connected to the connector; The connector tends to retract into the connecting hole under the elastic force of the elastic element.

[0012] Preferably, the mounting frame is provided with a long strip-shaped support beam, the support beam having the connecting hole and the two being parallel, the connecting hole passing through both ends of the support beam.

[0013] To achieve the same technical effect, the present invention also provides a display device, including the LED display unit as described above.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The LED display unit includes a mounting frame and multiple LED display modules. The multiple LED display modules are arranged horizontally on the mounting frame and combined to display the image. The back of the LED display modules is magnetically attached to the mounting frame, which greatly improves the installation efficiency of the LED display modules. The mounting frame is equipped with an AC power supply device for connecting to an external power source. The LED display modules are equipped with DC power supply devices for powering them. The AC power supply device is electrically connected to the DC power supply devices of the multiple LED display modules. One AC power supply device on the mounting frame supplies power to the DC power supply devices of the multiple LED display modules, which greatly reduces the amount of wiring work. Attached Figure Description

[0015] Figure 1 One of the schematic diagrams of the overall structure of the LED display unit of the invention; Figure 2 The second schematic diagram of the overall structure of the LED display unit of the invention; Figure 3 One of the exploded views of the LED display module of the LED display unit of the invention; Figure 4 The second exploded view of the LED display module of the LED display unit of the invention; Figure 5 A schematic diagram of the structure of the first electrical box of the LED display unit of the invention; Figure 6 The third schematic diagram of the overall structure of the LED display unit of the invention; Figure 7 for Figure 2 Enlarged view of point A in the middle; Figure 8 for Figure 6 Enlarged view of point B in the middle; Figure 9 This is an assembly diagram of the connection holes and connectors of the LED display unit of the invention; Figure 10 for Figure 9 Enlarged view of point C in the middle; Figure 11 This is a schematic diagram of the structure of the display device of the invention.

[0016] In the diagram: 1. Display device; 10. Mounting frame; 11. Connecting hole; 111. Limiting block; 111a. Limiting end face; 111b. Clearance hole; 12. First crossbeam; 13. Second crossbeam; 14. Support beam; 15. Elastic element; 16. Connecting element; 16a. Connecting end; 16b. Driving end; 161. Limiting ring; 20. LED display module; 20a. Front; 20b. Back; 21. Magnetic element; 22. Second electrical box; 221. Second maintenance port; 23. Mounting bracket; 231. Hollow structure; 30. First electrical box; 31. First maintenance port; 32. Mounting groove; 33. Cover; 100. LED display unit. Detailed Implementation

[0017] 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 many different 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.

[0018] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Example 1 Combination Figures 1 to 8 As shown, the LED display unit 100 of the present invention is schematically illustrated. This display unit is particularly suitable for scenarios such as shopping mall corridors, stage floors, exhibition center booths, stadium audience passages, and interactive exhibition areas in science museums, with its structural design highly adaptable to the needs of these scenarios. Specifically, the display unit includes a mounting frame 10 and multiple LED display modules 20. The mounting frame 10 is constructed from aluminum profiles, resulting in low material costs. Each LED display module 20 has a size of 500 x 500 mm and is arranged in a matrix of 12 modules in three rows and four columns on the mounting frame 10. The size of the mounting frame 10 can be flexibly adjusted in integer multiples of the number of modules according to the needs of the scenario. For example, when setting up a temporary booth in an exhibition center, the number of LED display modules 20 can be increased or decreased according to the booth area without redesigning the mounting frame 10, thus meeting the display area requirements of different scenarios. The LED display module 20 has a front side 20a and a back side 20b. The front side 20a is not only equipped with multiple LED light-emitting units, which can be LED beads or LED light-emitting chips, but also has a black transparent mask and tempered glass arranged in sequence. The black transparent mask has through holes for the LED light-emitting units to pass through. The black transparent mask can improve the display contrast and improve the display effect of the screen. The tempered glass can significantly enhance the impact resistance of the screen, making it suitable for high-traffic areas such as shopping malls and shopping centers, and avoiding damage to the screen caused by people stepping on it or shopping carts colliding with it. The back 20b of the LED display module 20 is first fixed to the mounting bracket 23 with screws, and then connected to the mounting frame 10 via magnetic attraction along with the mounting bracket 23. This dual connection method not only ensures the stability of the fixation, but also makes the disassembly and assembly of the LED display module 20 more convenient. For example, when it is necessary to change the LED display module 20 corresponding to the display content during the break of a stage performance, it can be quickly disassembled and assembled without complicated tools, and there is no need to set traditional screws or other fasteners on the front 20a of the LED display module 20, realizing the frameless design of the LED display module 20. After splicing, the whole screen image is continuous, which is suitable for science museums and interactive stage floor scenes, enhancing the audience's visual immersion.

[0021] The mounting frame 10 is equipped with an AC power supply unit for connecting to an external power source. Simultaneously, each LED display module 20 is equipped with a DC power supply unit electrically connected to it. Each LED display module 20 is powered by its own dedicated DC power supply unit. The AC power supply unit is electrically connected to the DC power supply units of multiple LED display modules 20, enabling one AC power supply unit to power multiple DC power supply units. This further reduces the number and diameter of cables, a design that offers significant advantages in stadium spectator aisle scenarios where wiring space is limited. The simplified wiring structure avoids safety hazards caused by messy cables and reduces the difficulty of later maintenance. In existing technologies, each LED display module 20 requires a separate power supply unit connected to an external power source, resulting in a complex power supply layout for the entire LED display unit 100, heavy wires, and affecting the deployment applicability of the LED display unit 100. The back 20b of the LED display module 20 (specifically the mounting bracket 23) is provided with a magnetic component 21. The magnetic component 21 can be an existing neodymium magnet. A metal adsorption component that can be magnetically attracted by the magnetic component 21 is adapted to be installed on the mounting frame 10. The positions of the metal adsorption component and the magnetic component 21 correspond one-to-one, ensuring that the LED display module 20 is stably adsorbed on the mounting frame 10 by the mounting bracket 23.

[0022] like Figure 2 , Figure 5 and Figure 7As shown, the LED display unit 100 also includes a first electrical box 30, which is made of aluminum alloy, combining lightweight and structural strength. The AC power supply device is housed within the first electrical box 30, which provides protection for it. The first electrical box 30 is detachably connected to the mounting frame 10 by screws, and is positioned opposite the back 20b of the LED display module 20. The LED display module 20 can shield the first electrical box 30, preventing it from being exposed and affecting the overall appearance of the product. This design is particularly important in scenarios with high aesthetic requirements, such as shopping malls and science museums, as it maintains the cleanliness of the display area. The first electrical box 30 has a first maintenance port 31, which is positioned opposite the back 20b of the LED display module 20. When the LED display unit is installed as a floor tile screen in venues such as stadium spectator passages or shopping mall corridors, the front 20a of the LED display module 20 faces upwards, and the first maintenance port 31 also faces upwards, conforming to the "door opening upwards" front maintenance design. If the electrical equipment malfunctions, maintenance personnel only need to apply force to overcome the magnetic force of the magnetic component 21 to remove the corresponding LED display module 20, thereby exposing the first maintenance port 31 for repair. There is no need to pry open the entire floor or dismantle surrounding facilities, thus avoiding affecting the normal use of the scene. At the same time, a cover 33 is rotatably connected to one side of the first maintenance port 31. The cover 33 can be flipped relative to the first electrical box 30 to cover the maintenance port, effectively preventing dust, spilled beverages, and other foreign objects and liquids from entering the interior of the first electrical box 30, ensuring the safe operation of the electrical equipment. Figure 5 and Figure 7 To further facilitate the disassembly and assembly of the first electrical box 30, it is also provided with a mounting groove 32. The opening of the mounting groove 32 is positioned opposite to the back 20b of the LED display module 20. Part of the mounting frame 10 is embedded in the mounting groove 32, so that the first electrical box 30 fits tightly with the frame. When disassembling, there is no need to remove the LED display module 20 on the frame. Simply move it away from the LED display module 20 to separate the first electrical box 30 from the mounting frame 10. This feature is very practical in the temporary exhibition booth scenario of the exhibition center. After the exhibition, the equipment can be quickly disassembled and recycled, improving the equipment reuse rate.

[0023] like Figure 8The mounting frame 10 includes a first crossbeam 12 and a second crossbeam 13 that are perpendicular to and connected to each other. The number of the first crossbeam 12 and / or the second crossbeam 13 can be flexibly set according to the size of the cabinet. The longitudinally and transversely arranged first crossbeam 12 and second crossbeam 13 not only form the outline structure of the mounting frame 10, but also stably support the LED display module 20. That is, the LED display module 20 is magnetically attached to the first crossbeam 12 and the second crossbeam 13 through the magnetic attraction of the mounting bracket 23. This support method can distribute the weight of the module and external impact force. For example, when it is hit by a shopping cart in a shopping mall or trampled by spectators in a stadium, the first crossbeam 12 and / or the second crossbeam 13 can distribute the force to the entire frame, avoiding the problems of screen flickering and yellowing that are prone to occur under the rigid connection of traditional die-cast aluminum cabinets, and ensuring the display stability in different scenarios. Figure 3 and Figure 4 The LED display module 20 has a second electrical box 22 on its back 20b. The DC power supply device is housed in the second electrical box 22, which provides protection for the DC power supply device. The second electrical box 22 is fixed on the mounting bracket 23 and has a second maintenance port 221. The second maintenance port 221 faces the same direction as the back 20b of the LED display module 20. The second electrical box 22 contains a DC power supply that provides power to the LED display module 20 separately. Installation and maintenance personnel can connect the internal DC power supply through the second maintenance port 221. This design of dedicated power supply for each LED display module 20 makes it easy to adjust the power supply parameters of the modules in different interactive areas in the interactive exhibition area of ​​the science museum, meeting the personalized needs of interactive display. At the same time, it simplifies the wiring structure and avoids the debugging difficulties caused by multiple modules sharing the same power supply. In addition to the aforementioned magnetic component 21, the mounting bracket 23 also features multiple hollow structures 231 arranged in a matrix. These hollow structures 231 not only reduce the weight of the mounting bracket 23, making it easier to transport and install in venues such as exhibition centers and stages, but also enhance breathability, thereby improving the heat dissipation efficiency of the LED display module 20 and ensuring the stability of the module under long-term high-load operation. For example, in the interactive exhibition area of ​​a science museum, the display unit needs to continuously respond to audience interaction operations. Stable heat dissipation under long-term illumination can prevent frequent failures and improve the audience experience.

[0024] Example 2 Combination Figures 1 to 10As shown, the LED display unit 100 of this embodiment is particularly suitable for scenarios such as shopping mall corridors, stage floors, exhibition center booths, stadium audience passages, and science museum interactive exhibition areas. Its structural design is highly adaptable to the needs of these scenarios. Specifically, the display unit includes a mounting frame 10 and multiple LED display modules 20. The mounting frame 10 is made of aluminum profiles, resulting in low material costs. Each LED display module 20 has a size of 500x500mm and is arranged in a matrix of 12 modules in three rows and four columns on the mounting frame 10. The size of the mounting frame 10 can be flexibly adjusted in multiples of the number of modules according to the needs of the scenario. For example, when setting up a temporary booth in an exhibition center, the number of LED display modules 20 can be increased or decreased according to the booth area without redesigning the mounting frame 10, thus meeting the display area requirements of different scenarios. The LED display module 20 has a front side 20a and a back side 20b. The front side 20a is not only equipped with multiple LED light-emitting units, which can be LED beads or LED light-emitting chips, but also has a black transparent mask and tempered glass arranged in sequence. The black transparent mask has through holes for the LED light-emitting units to pass through. The black transparent mask can improve the display contrast and improve the display effect of the screen. The tempered glass can significantly enhance the impact resistance of the screen, making it suitable for high-traffic areas such as shopping malls and shopping centers, and avoiding damage to the screen caused by people stepping on it or shopping carts colliding with it. The back 20b of the LED display module 20 is first fixed to the mounting bracket 23 with screws, and then connected to the mounting frame 10 via magnetic attraction along with the mounting bracket 23. This dual connection method not only ensures the stability of the fixation, but also makes the disassembly and assembly of the LED display module 20 more convenient. For example, when it is necessary to change the LED display module 20 corresponding to the display content during the break of a stage performance, it can be quickly disassembled and assembled without complicated tools, and there is no need to set traditional screws or other fasteners on the front 20a of the LED display module 20, realizing the frameless design of the LED display module 20. After splicing, the whole screen image is continuous, which is suitable for science museums and interactive stage floor scenes, enhancing the audience's visual immersion.

[0025] The mounting frame 10 is equipped with an AC power supply unit for connecting to an external power source. Simultaneously, each LED display module 20 is equipped with a DC power supply unit electrically connected to it. Each LED display module 20 is powered by its own dedicated DC power supply unit. The AC power supply unit is electrically connected to the DC power supply units of multiple LED display modules 20, enabling one AC power supply unit to power multiple DC power supply units. This further reduces the number and diameter of cables, a design that offers significant advantages in stadium spectator aisle scenarios where wiring space is limited. The simplified wiring structure avoids safety hazards caused by messy cables and reduces the difficulty of later maintenance. In existing technologies, each LED display module 20 requires a separate power supply unit connected to an external power source, resulting in a complex power supply layout for the entire LED display unit, heavy wires, and impacting the deployment applicability of the LED display unit. The back 20b of the LED display module 20 (specifically the mounting bracket 23) is provided with a magnetic component 21. The magnetic component 21 can be an existing neodymium magnet. A metal adsorption component that can be magnetically attracted by the magnetic component 21 is adapted to be installed on the mounting frame 10. The positions of the metal adsorption component and the magnetic component 21 correspond one-to-one, ensuring that the LED display module 20 is stably adsorbed on the mounting frame 10 by the mounting bracket 23.

[0026] like Figure 9 and Figure 10 In this embodiment, the mounting frame 10 is provided with connecting holes 11 extending through both sides of it. A connector 16 is inserted into the connecting hole 11 and is movably connected to the connecting hole 11. This allows the connector 16 to rotate relative to the connecting hole 11 around the axis of the connecting hole 11 within the connecting hole 11. The connector 16 can also slide relative to the connecting hole 11 along the axis of the connecting hole 11 within the connecting hole 11. The length of the connector 16 is less than or equal to the length of the connecting hole 11, which allows the connector 16 to be completely housed within the connecting hole 11. When the connecting end 16a of the connector 11 is not required to connect with the connecting holes 11 of other mounting frames 10, both ends of the connector 16 are not exposed at the ends of the connecting holes 11. This not only improves the appearance of the product, but also prevents the ends of the connector 16 (such as the connecting end 16a and the driving end 16b) from being exposed and accidentally damaged by impact. This prevents damage from accidental impact during transportation, storage, or use, and also prevents the exposed ends of the connector 16 from scratching on-site installation and maintenance personnel, workers, or visitors, thus improving the safety of product use. In addition, the LED display unit 100 also includes an elastic element 15. One end of the elastic element 15 is connected to the mounting frame 10, and the other end of the elastic element 15 is connected to the connector 16. The connecting end 16a of the connector 16 has a tendency to retract into the connecting hole 11 under the elastic force of the elastic element 15.

[0027] The two ends of the connector 16 are respectively referred to as the connecting end 16a and the driving end 16b. The connecting end 16a of the connector 16 can be inserted into the connecting hole 11 of other mounting frames 10. Specifically, the connecting end 16a is provided with an external thread, and the connecting hole 11 is provided with an internal thread. The connecting end 16a of the connector 16 can be connected to the connecting hole 11 of other mounting frames 10 through the aforementioned external thread and internal thread to realize the splicing connection of two adjacent mounting frames 10. During the assembly of the two mounting frames 10, the installation and maintenance personnel can use their hands or other existing tools to push the drive end 16b of the connector 16 so that the connector 16 slides axially relative to the connecting hole 11, so that the connecting end 16a of the connector 16 abuts against the connecting hole 11 of the other mounting frame 10. Then, force is applied to rotate the drive end 16b of the connector 16 so that the connector 16 rotates relative to the connecting hole 11. Through the above-mentioned external thread and internal thread engagement, the connector 16 is tightly engaged with the connecting hole 11 of the other mounting frame 10. Even in scenarios with strong impact, such as intense competitive sports, it can prevent a single mounting frame 10 from shaking and becoming unstable, thus ensuring the safety of the overall structure of the floor tile screen. The entire operation only requires operating the drive end 16b of the connector 16 inside the connection hole 11 on one side of the mounting frame 10. There is no need to remove the LED display module 20 and other components already installed on the mounting frame 10. This completely solves the problems of display modules blocking the operation position and cumbersome disassembly and assembly processes in traditional splicing technology. It fundamentally maintains the integrity of the cabinet from beginning to end and greatly improves the efficiency of on-site installation and disassembly.

[0028] like Figure 10 The connecting hole 11 is provided with a limiting block 111 having a limiting end face 111a. The limiting block 111 can be block-shaped or annular. In this embodiment, the limiting block 111 is block-shaped. A clearance hole 111b is provided in the center of the limiting block 111. The clearance hole 111b is connected to the connecting hole 11, and the diameter of the clearance hole 111b is smaller than that of the connecting hole 11. The connecting end 16a of the connector 16 can pass through the clearance hole 111b. The connector 16 is provided with a limiting ring 161, which is set in the radial direction of the connector 16. When the connecting end 16a of the connector 16 is inserted into the connecting hole 11 of another mounting frame 10, the limiting ring 161 abuts against the limiting end face 111a. The setting of the limiting block 111 can limit the stroke of the connector 16, making the connection between two adjacent mounting frames 10 more stable.

[0029] The mounting frame 10 includes a first crossbeam 12 and a second crossbeam 13 that are perpendicular to and connected to each other. The number of the first crossbeam 12 and / or the second crossbeam 13 can be flexibly set according to the size of the cabinet. The first crossbeam 12 and the second crossbeam 13 arranged in the longitudinal and transverse directions not only form the outline structure of the mounting frame 10, but also stably support the LED display module 20. That is, the LED display module 20 is magnetically attached to the first crossbeam 12 and the second crossbeam 13 through the magnetic attraction of the mounting bracket 23. This support method can disperse the weight of the module and external impact force. For example, when it is hit by a shopping cart in a shopping mall or trampled by spectators in a stadium, the first crossbeam 12 and / or the second crossbeam 13 can disperse the force to the entire frame, avoiding the problems of screen flickering and yellowing that are easy to occur under the hard connection of traditional die-cast aluminum cabinets, and ensuring the display stability in different scenarios.

[0030] The mounting frame 10 also includes a long, narrow support beam 14. The support beam 14 has parallel connecting holes 11 that extend through both ends of the beam. This design combines the load-bearing structure of the mounting frame 10 (i.e., the support beam 14) with the connecting holes 11, resulting in a more compact overall structure, reducing the number of structural components, lowering the overall weight of the product, simplifying the production and assembly process, and further reducing manufacturing costs. In some optional embodiments, the support beam 14 and the second crossbeam 13 may be the same component.

[0031] Example 3 like Figure 11 This embodiment discloses a display device 1, including multiple LED display units 100 as described above. Connectors and connection holes 11 of two adjacent mounting frames 10 are connected to splice multiple LED display units 100 to form a larger display screen. The back surface 20b of the LED display module 20 is magnetically attached to the mounting frame 10, which greatly improves the installation efficiency of the LED display module 20.

[0032] In summary, the LED display unit 100 includes a mounting frame 10 and multiple LED display modules 20. The multiple LED display modules 20 are arranged horizontally on the mounting frame 10 and combined to display images. The back surface 20b of the LED display modules 20 is magnetically attached to the mounting frame 10, which greatly improves the installation efficiency of the LED display modules 20. The LED display modules 20 are provided with a DC power supply device 24 for powering them. AC power supply devices 15 are electrically connected to the DC power supply devices 24 of the multiple LED display modules 20 respectively. One AC power supply device 15 on the mounting frame 10 supplies power to the DC power supply devices 24 of the multiple LED display modules 20, which greatly reduces the amount of wiring work.

[0033] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An LED display unit, characterized in that, Includes the mounting frame and multiple LED display modules; Multiple LED display modules are arranged in an array on the mounting frame. Each LED display module has a front and a back, and the back of the LED display module is magnetically attached to the mounting frame. The mounting frame is provided with an AC power supply device for connecting to an external power source, and the LED display module is provided with a DC power supply device for supplying power to it. The AC power supply device is electrically connected to the DC power supply devices of the multiple LED display modules respectively.

2. The LED display unit according to claim 1, characterized in that, The back side of the LED display module and / or the mounting frame are provided with magnetic components, and the back side of the LED display module and the mounting frame are connected by magnetic attraction through the magnetic components.

3. The LED display unit according to claim 1, characterized in that, It also includes a first electrical box, which houses the AC power supply device. The first electrical box is detachably connected to the mounting frame and is positioned opposite to the back of the LED display module.

4. The LED display unit according to claim 1, characterized in that, The back of the LED display module is provided with a second electrical box having a second maintenance port. The second maintenance port faces the same direction as the back of the LED display module. The DC power supply device is provided inside the second electrical box.

5. The LED display unit according to claim 1, characterized in that, The back of the LED display module is provided with a mounting bracket, which is connected to the mounting frame by magnetic attraction; the mounting bracket has multiple hollow structures arranged in a matrix.

6. The LED display unit according to any one of claims 1 to 5, characterized in that, The mounting frame is provided with connecting holes extending through both sides, and a connector is movably inserted into the connecting holes; the end of the connector is used for plugging into the connecting holes of other mounting frames.

7. The LED display unit according to claim 6, characterized in that, The connecting hole is provided with a limiting block having a limiting end face, and the connecting piece is provided with a limiting ring; When the end of the connector is inserted into the connecting hole of another mounting frame, the limiting ring abuts against the limiting end face.

8. The LED display unit according to claim 6, characterized in that, It also includes an elastic element, one end of which is connected to the mounting frame and the other end of which is connected to the connector; The connector tends to retract into the connecting hole under the elastic force of the elastic element.

9. The LED display unit according to claim 6, characterized in that, The mounting frame is provided with a long strip-shaped support beam, and the support beam has the connecting hole, which is parallel to the support beam and passes through both ends of the support beam.

10. A display device, characterized in that, Includes the LED display unit as described in any one of claims 1 to 9.

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