LED spliced waterproof large screen device

Abstract

The utility model relates to the technical field of LED display screens, and discloses an LED spliced waterproof large screen device which comprises a plurality of LED modules which are independently designed and spliced with one another, and each LED module comprises an LED panel layer arranged on the upper portion and waterproof sealing grooves formed in the two side edges. The LED panel layer comprises a PCB, a plurality of LED lamp beads arranged on the PCB and a BN polymer material film arranged on the upper portion of the LED panel layer, and the BN polymer material film is attached to the top faces of the LED lamp beads. According to the LED screen module, through multi-aspect structural improvement, the sealing performance and the heat dissipation performance are improved, through arrangement of the BN polymer material film, the waterproof sealing groove, the bonding sealing strip and the water retaining block, the sealing performance between the LED screen modules after connection is improved, invasion of external water vapor can be effectively blocked, electrical elements in the LED screen modules are protected, and the service life of the LED screen modules is prolonged. And the service life of the LED screen module is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of LED display screens, in particular to an LED splicing waterproof large-screen device. Background Art

[0002] LED electronic displays utilize semiconductor light-emitting diodes (LEDs) to control displays. They consist of tens to hundreds of thousands of evenly spaced LED pixels. Using different materials, LED pixels can be created in varying colors to display text, graphics, images, animations, market quotes, videos, video feeds, outdoor advertisements, and other information. However, outdoor LED screens are susceptible to various weather conditions, with water and moisture being particularly detrimental to the electronic components within them. Outdoor temperatures fluctuate widely, and high temperatures can easily overheat LED lamps, accelerating aging and reducing light efficiency. High humidity can also cause moisture to build up within the LED screen's internal components, leading to short circuits or corrosion, shortening its lifespan. Therefore, waterproofing, moisture resistance, and heat dissipation are crucial for outdoor LED applications.

[0003] For example, in the prior art, Chinese utility model patent document CN203415177U discloses an LED display module with a liquid crystal screen, including a lampshade, a lamp board, a pad, a supporting substrate, a lamp board, a control board and a power supply, and also includes an LCD screen, the LCD screen is fixed on the control board, and the LCD screen is used to display the temperature status, power-on running time, power status, and test status. Through the LCD screen, the operator can easily understand the current status of the LED display module, and can easily operate or repair the LED display module, which greatly improves the efficiency of use. Although the LED display module of the prior art has a simple and light structure, high compressive strength, high stability, and is easy to install and transport, it does not solve the problems of waterproofing and heat dissipation, and the sealing of the LED display module is also defective.

[0004] To sum up, the LED screen module in the existing technology is made up of multiple LED display screens, but the joints between the LED display screens have poor sealing, resulting in poor waterproof effect. When the LED display screen is eroded by rainwater (or water vapor), rainwater (or water vapor) will enter the interior of the LED screen module along the gaps between the LED display screens, causing damage to the electrical components in the LED screen module and reducing the service life of the LED screen module; if tiny cracks are generated between the LED spliced ​​screens during use, it will also cause water vapor to enter and local LED lamp beads to be damaged, affecting the display effect. Utility Model Content

[0005] The purpose of this utility model is to provide a large waterproof LED splicing screen device, which improves its sealing and heat dissipation properties simultaneously through various structural improvements and designs, and focuses on improving the sealing of the gaps after the LED screen module is connected, so as to effectively block the intrusion of external rain or water vapor, protect the electrical components in the LED screen module, and thus increase the service life of the LED screen module.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] An LED splicing waterproof large screen device, comprising a plurality of independently designed, mutually spliced ​​LED modules and a stacked LED substrate layer;

[0008] Each LED module includes a stacked LED panel layer and an inwardly concave waterproof sealing groove surrounding the side surface of the interlayer between the LED panel layer and the LED substrate layer;

[0009] The LED panel layer includes: a BN polymer material film, a plurality of LED lamp beads, and a PCB circuit board, which are stacked in sequence from top to bottom. The BN polymer material film is provided as the upper end surface of the LED panel layer, and the PCB circuit board is provided as the bottom surface of the LED panel layer. A plurality of LED lamp beads are spaced apart in the interlayer between the BN polymer material film and the PCB circuit board, and a heat-conductive particle material is provided in the gaps between the LED lamp beads. Each LED lamp bead is electrically connected to the PCB circuit board.

[0010] The PCB circuit board is arranged on the LED substrate layer; the BN polymer material film is arranged on the upper end surface of each LED lamp bead and the thermal conductive particle material;

[0011] Two adjacent LED modules are connected to each other through a first adhesive sealing strip and a second adhesive sealing strip provided in the waterproof sealing groove, and the first adhesive sealing strip and the second adhesive sealing strip are provided in parallel;

[0012] The PCB circuit boards of the LED modules are electrically connected to each other, and the four sides of each LED module are connected to each other via a first adhesive sealing strip and a second adhesive sealing strip respectively;

[0013] Multiple independent LED modules are spliced ​​in sequence and arranged on a large LED substrate layer to form an LED splicing waterproof large screen device as a whole.

[0014] Furthermore, the top surface of the thermally conductive particle material is at the same height as the top surface of each LED lamp bead; the top surface of the thermally conductive particle material and the top surface of each LED lamp bead are both in contact with the BN polymer material film.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The LED splicing waterproof large-screen device provided in this application improves its sealing and heat dissipation through various structural improvements and designs. A BN polymer material film is arranged on the upper part of the LED panel layer to prevent the LED panel layer from cracking, thereby solving the problem of panel waterproofing; the BN polymer material film is bonded to the top of the LED lamp beads, effectively solving the problem of heat dissipation of the LED lamp beads, and at the same time improving the sealing of the pores between the LED screen modules after connection, which can effectively block the intrusion of external rain or water vapor, protect the electrical components in the LED screen module, and thus increase the service life of the LED screen module.

[0017] 2. The LED splicing waterproof large-screen device provided in this application has improved structural design in many aspects, set up thermal conductive microparticle material and filled it between LED lamp beads, and combined with BN polymer material film to improve heat dissipation performance and avoid heat accumulation that shortens LED life.

[0018] 3. The LED splicing waterproof large screen device provided in this application has improved structural design in many aspects, and is equipped with waterproof sealing grooves, adhesive sealing strips, and water retaining blocks, which improves the sealing between the LED screen modules after connection, can effectively block the intrusion of external water vapor, protect the electrical components in the LED screen module, and increase the service life of the LED screen module.

[0019] 4. The LED splicing waterproof large screen device provided in this application has a triple sealing design through multi-faceted structural improvements, and is equipped with a waterproof sealing groove, an adhesive sealing strip, and a water retaining block. It effectively blocks external moisture from invading the gap between the LED modules, increases the sealing between the two LED display screens after connection, and can effectively block the intrusion of external water vapor, protect the electrical components in the LED screen module, and thus increase the service life of the LED screen module.

[0020] 5. The LED splicing waterproof large-screen device provided in this application has been designed with universal modules through various structural improvements. The modules can be easily replaced or upgraded to achieve screen expansion and upgrade. When a single module is damaged, there is no need to replace the entire screen. The modular design simplifies the installation process and improves installation efficiency. When a problem occurs with a single module, it can be quickly replaced without disassembling the entire screen, reducing maintenance costs and time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of an LED splicing waterproof large screen device assembled from four LED modules according to an embodiment of the present application;

[0022] Figure 2 This is a schematic diagram of the main structure of the waterproof LED screen device of an embodiment of the present application, which is assembled from 20 LED modules;

[0023] Figure 3 This is a schematic structural diagram of a single LED module according to an embodiment of the present application;

[0024] Figure 4 This is an exploded view of a single LED module according to an embodiment of the present application;

[0025] Figure 5 For the embodiment of this application Figure 4 Schematic diagram of the local enlarged structure at B in the middle;

[0026] Figure 6 This is a schematic structural diagram of the second adhesive sealing strip and the clamp in an embodiment of the present application;

[0027] Figure 7 For the embodiment of this application Figure 6 Schematic diagram of the local enlarged structure at A in the middle;

[0028] Figure 8 This is a schematic diagram of the structure of the plug board and the connecting board of the embodiment of the present application;

[0029] Figure 9 This is a schematic diagram of the bottom structure of the plug board and the connecting plate of an embodiment of the present application;

[0030] Figure 10 This is a schematic diagram of the cross-sectional structure of the LED panel layer of an embodiment of the present application.

[0031] In the figure: 1. LED module; 11. LED panel layer; 12. LED substrate layer; 13. BN polymer material film; 14. LED lamp beads; 15. PCB circuit board; 16. Thermal conductive particle material; 2. Waterproof sealing groove; 3. First bonding sealing strip; 4. Second bonding sealing strip; 41. Card slot; 5. Insert plate; 51. Through hole; 6. Water retaining block; 61. First sealing groove; 62. Second sealing groove; 63. Clamp; 64. Card block; 641. Trapezoidal block; 642. Connecting column; 643. First spring; 7. Connecting plate; 71. Groove; 72. Second spring; 73. Limiting column; 8. Fixing plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example 1

[0034] See also Figures 1 to 10The LED splicing waterproof large screen device provided by the present invention focuses on improving the design to solve the problems of insufficient sealing and heat dissipation during actual construction and use. It includes multiple independently designed and spliced ​​LED modules 1 and a stacked LED substrate layer 12;

[0035] Each LED module 1 includes a stacked LED panel layer 11 and an inwardly concave waterproof sealing groove 2 surrounding the side surface of the interlayer between the LED panel layer 11 and the LED substrate layer 12;

[0036] The LED panel layer 11 includes: a BN polymer material film 13, a plurality of LED lamp beads 14, and a PCB circuit board 15, which are stacked in sequence from top to bottom. The BN polymer material film 13 is provided as the upper end surface of the LED panel layer 11, and the PCB circuit board 15 is provided as the bottom surface of the LED panel layer 11. In the interlayer between the BN polymer material film 13 and the PCB circuit board 15, a plurality of LED lamp beads 14 are spaced apart. A thermal conductive particle material 16 is provided in the gaps between the LED lamp beads 14. Each LED lamp bead 14 is electrically connected to the PCB circuit board 15.

[0037] The PCB circuit board 15 is arranged on the LED substrate layer 12; the BN polymer material film 13 is arranged on the upper end surface of each LED lamp bead 14 and the thermal conductive particle material 16;

[0038] Two adjacent LED modules 1 are connected to each other through a first adhesive sealing strip 3 and a second adhesive sealing strip 4 provided in the waterproof sealing groove 2. The first adhesive sealing strip 3 and the second adhesive sealing strip 4 are provided in parallel.

[0039] The PCB circuit boards 15 of the LED modules 1 are electrically connected to each other, and the four sides of each LED module 1 are connected to each other via a first adhesive sealing strip 3 and a second adhesive sealing strip 4 respectively;

[0040] A plurality of independent LED modules 1 are sequentially spliced ​​and arranged on a large LED substrate layer 12 to form an LED spliced ​​waterproof large screen device as a whole.

[0041] Optionally, the top surface of the thermally conductive particle material 16 is at the same height as the top surface of each LED lamp bead 14 ; the top surface of the thermally conductive particle material 16 and the top surface of each LED lamp bead 14 are both in contact with the BN polymer material film 13 .

[0042] The embodiment of the present application can prevent water from entering the surface of the LED panel layer through the BN polymer material film provided; and the triple sealing design of the second adhesive sealing strip and the second adhesive sealing strip can effectively prevent external water from invading the gap between the two LED modules; the two sets of waterproof designs can meet the waterproof requirements of application scenarios such as LED outdoor screens. The LED splicing waterproof large screen device provided by the present application improves its sealing and heat dissipation properties through various structural improvements and designs. A BN polymer material film is provided on the upper part of the LED panel layer to prevent the LED panel layer from cracking. The BN polymer material film is attached to the top of the LED lamp beads to effectively solve the heat dissipation problem of the LED lamp beads. The LED splicing waterproof large screen device provided by the present application improves its heat dissipation properties through various structural improvements and designs. A heat-conducting particulate material is provided and filled between the LED lamp beads. In combination with the BN polymer material film, the heat dissipation performance is improved to avoid heat accumulation leading to shortened LED life.

[0043] Example 2

[0044] See also Figures 1 to 10 This embodiment is an improvement on the basis of embodiment 1. The LED module 1 further includes water blocks 6 arranged on the other two sides. The water blocks 6 are respectively provided with a first sealing groove 61 and a second sealing groove 62. The first bonding sealing strip 3 on one of the LED modules 1 is clamped into the inside of the first sealing groove 61 on the water block 6 in the other LED module 1, and the second bonding sealing strip 4 on one of the LED modules 1 is clamped into the inside of the second sealing groove 62 on the water block 6 in the other LED module 1.

[0045] Optionally, a clamp 63 is installed inside the second sealing groove 62 , a clamping block 64 is installed inside the clamping hoop 63 , a clamping groove 41 is opened on the outer wall of the second adhesive sealing strip 4 , and the clamping block 64 is clamped inside the clamping groove 41 .

[0046] Optionally, the clamping block 64 includes a trapezoidal block 641, one end of the trapezoidal block 641 is connected to a connecting column 642, the inner wall of the clamp 63 is provided with a mounting groove, and a first spring 643 is connected between one end of the connecting column 642 and the inner wall of the mounting groove.

[0047] Optionally, one side of the bottom of the LED substrate layer 12 is connected to the plug board 5 , and the other side of the bottom of the LED substrate layer 12 is connected to the fixing plate 8 , and the fixing plate 8 is connected to the connecting plate 7 .

[0048] Optionally, a receiving cavity is provided inside the plug board 5 , and the connecting plate 7 on one of the LED modules 1 is plugged into the receiving cavity of the plug board 5 on another LED module 1 .

[0049] Optionally, a groove 71 is formed at the bottom of the connecting plate 7 , a limiting column 73 is movably installed inside the groove 71 , and a second spring 72 is connected between one end of the limiting column 73 and the inner wall of the groove 71 .

[0050] Optionally, a through hole 51 communicating with the accommodating cavity is formed at the bottom of the inserting plate 5 , and the other end of the limiting column 73 passes through the through hole 51 and is located at the bottom of the inserting plate 5 .

[0051] It's worth noting that the BN polymer film and thermally conductive microparticles used in this embodiment are both existing technologies. Since LEDs generate heat during use, covering them with ordinary glass or resin would cause heat accumulation, shortening their lifespan. Therefore, the BN polymer film is made from high-purity, high-transparency epoxy resin, with borosilicate and high-purity magnesium oxide silica gel added to enhance transmittance. The material's processing temperature is controlled at 79°C (±0.2°C) before being applied to the LED screen surface. The surface curing time is controlled to 10 seconds to avoid bubbles or discoloration that could affect transparency due to excessive processing temperatures and times. The coating thickness on the LED screen is controlled at 0.2mm. Laboratory testing shows a transmittance of 99.8%. The BN polymer material's coefficient of thermal expansion is 35 x 10^-6 / °C, close to that of the LED housing (30 x 10^-6 / °C) and the copper bracket (17.7 x 10^-6 / °C). No significant fracture at the contact points due to lateral tension was observed under a 500x microscope in the laboratory.

[0052] Thermally conductive particle materials are polymer-based composite materials with high thermal conductivity prepared by filling thermally conductive particles into polymers; the thermally conductive particles include their own thermal conductivity, shape, size, addition amount, dispersion, orientation, interface bonding, interface area, and type; the thermally conductive particle material is based on epoxy resin, and borosilicate, high-purity magnesium oxide silica gel, silicon dioxide (SiO2), silicon carbide (SiC) and other materials are added respectively. The thermal conductivity coefficient of the prepared thermally conductive particle material is higher than that of the unmodified traditional composite material.

[0053] The assembly process of the LED splicing waterproof large screen device of this embodiment is as follows:

[0054] When assembling the LED screen module, first take two LED modules 1 and insert the first adhesive sealing strip 3 in the waterproof sealing groove 2 of one LED module 1 into the first sealing groove 61 in the water retaining block 6 of the other LED module 1 by side insertion. The second adhesive sealing strip 4 in the waterproof sealing groove 2 of one LED module 1 is inserted into the second sealing groove 62 in the water retaining block 6 of the other LED module 1.

[0055] During the insertion process, the trapezoidal block 641 of the clamping block 64 in the second sealing groove 62 contacts the outer wall of the second adhesive sealing strip 4, and the trapezoidal block 641 drives the connecting post 642 to extend into the interior of the installation groove. At the same time, the first spring 643 is compressed until the trapezoidal block 641 moves to the position of the clamping groove 41. The first spring 643 restores its shape and, under the action of the elastic force, pushes the trapezoidal block 641 into the interior of the clamping groove 41, indicating that the two LED modules 1 are installed in place.

[0056] To ensure the stability of the installation of the two LED modules 1, during the installation process, the connecting plate 7 is inserted into the accommodating cavity on the plug-in board 5. After the connecting plate 7 and the plug-in board 5 are installed in place, the limiting column 73 on the connecting plate 7 is pushed into the interior of the through hole 51 under the elastic force of the second spring 72.

[0057] The LED splicing waterproof large screen device provided in this embodiment was trial-produced on a small scale under confidentiality and applied to a large outdoor advertising screen project in a city center square. Figure 2 20 LED modules are arranged in a 4x5 configuration, with each module measuring 1 meter long and 0.5 meters high. Based on the screen's dimensions, these 20 modules are spliced ​​together to create a large outdoor advertising screen measuring 4 meters long and 2.5 meters high. Display content includes dynamic ads, videos, and live broadcasts. The installation environment is outdoors, subject to high temperatures, humidity, and dust. This outdoor advertising screen has proven effective: It maintains clear content even after multiple rainstorms and high temperatures. Inspections have confirmed no signs of water ingress or seepage within the LED screen modules. The system operates stably, requiring no frequent maintenance.

[0058] In summary, the LED splicing waterproof large screen device provided by the present application, through various structural improvements and designs, is provided with waterproof sealing grooves, adhesive sealing strips, and water blocks, which improves the sealing between the LED screen modules after connection, can effectively block the intrusion of external water vapor, protect the electrical components in the LED screen module, and improve the service life of the LED screen module. The LED splicing waterproof large screen device provided by the present application, through various structural improvements and designs, is provided with waterproof sealing grooves, adhesive sealing strips, and water blocks, and a triple sealing design, which effectively blocks external moisture from invading the gap between the LED modules, increases the sealing between the two LED display screens after connection, can effectively block the intrusion of external water vapor, protect the electrical components in the LED screen module, and improve the service life of the LED screen module. The LED splicing waterproof large screen device provided by the present application, through various structural improvements and designs, adopts universal modules, can easily replace or upgrade modules, realize screen expansion and upgrade, without replacing the entire screen; modular design simplifies the installation process and improves installation efficiency; when a single module has a problem, it can be quickly replaced without disassembling the entire screen, reducing maintenance costs and time.

[0059] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A LED splicing waterproof large screen device, characterized in that: It comprises a plurality of independently designed and mutually spliced ​​LED modules (1) and a stacked LED substrate layer (12); Each LED module (1) comprises a stacked LED panel layer (11) and an inwardly concave waterproof sealing groove (2) provided around the side surface of the interlayer between the LED panel layer (11) and the LED substrate layer (12); The LED panel layer (11) comprises: a BN polymer material film (13), a plurality of LED lamp beads (14), and a PCB circuit board (15) stacked in sequence from top to bottom, wherein the BN polymer material film (13) is arranged as the upper end surface of the LED panel layer (11), and the PCB circuit board (15) is arranged as the bottom surface of the LED panel layer (11); a plurality of LED lamp beads (14) are arranged at intervals in the interlayer between the BN polymer material film (13) and the PCB circuit board (15); and a heat-conducting particle material (16) is arranged in the gaps between the LED lamp beads (14); and each LED lamp bead (14) is electrically connected to the PCB circuit board (15); The PCB circuit board (15) is arranged on the LED substrate layer (12); the BN polymer material film (13) is arranged on the upper end surface of each LED lamp bead (14) and the thermal conductive particle material (16); Two adjacent LED modules (1) are connected to each other via a first bonding sealing strip (3) and a second bonding sealing strip (4) arranged in the waterproof sealing groove (2), and the first bonding sealing strip (3) and the second bonding sealing strip (4) are arranged in parallel; The PCB circuit boards (15) of each LED module (1) are electrically connected to each other, and the four side surfaces of each LED module (1) are respectively connected to each other via a first adhesive sealing strip (3) and a second adhesive sealing strip (4); A plurality of independent LED modules (1) are sequentially spliced ​​and arranged on a large LED substrate layer (12), forming an LED spliced ​​waterproof large screen device as a whole.

2. The LED splicing waterproof large screen device according to claim 1, characterized in that: The top surface of the thermally conductive particle material (16) is at the same height as the top surface of each LED lamp bead (14); the top surface of the thermally conductive particle material (16) and the top surface of each LED lamp bead (14) are both in contact with the BN polymer material film (13).

3. The LED splicing waterproof large screen device according to claim 1, characterized in that: The LED module (1) further comprises water retaining blocks (6) arranged on the other two side edges, wherein the water retaining blocks (6) are respectively provided with a first sealing groove (61) and a second sealing groove (62), wherein the first adhesive sealing strip (3) on one of the LED modules (1) is clamped into the interior of the first sealing groove (61) on the water retaining block (6) in the other LED module (1), and the second adhesive sealing strip (4) on one of the LED modules (1) is clamped into the interior of the second sealing groove (62) on the water retaining block (6) in the other LED module (1).

4. The LED splicing waterproof large screen device according to claim 3, characterized in that: A clamp (63) is installed inside the second sealing groove (62), and a clamping block (64) is installed inside the clamping hoop (63). A clamping groove (41) is opened on the outer wall of the second adhesive sealing strip (4), and the clamping block (64) is clamped inside the clamping groove (41).

5. The LED splicing waterproof large screen device according to claim 4, characterized in that: The clamping block (64) comprises a trapezoidal block (641), one end of the trapezoidal block (641) is connected to a connecting column (642), an inner wall of the clamp (63) is provided with a mounting groove, and a first spring (643) is connected between one end of the connecting column (642) and the inner wall of the mounting groove.

6. The LED splicing waterproof large screen device according to claim 1, characterized in that: One side of the bottom of the LED substrate layer (12) is connected to an inserting plate (5), the other side of the bottom of the LED substrate layer (12) is connected to a fixing plate (8), and the fixing plate (8) is connected to a connecting plate (7).

7. The LED splicing waterproof large screen device according to claim 6, characterized in that: The plug board (5) is provided with a receiving cavity inside, and the connecting plate (7) on one of the LED modules (1) is plugged into the receiving cavity of the plug board (5) on another LED module (1).

8. The LED splicing waterproof large screen device according to claim 7, characterized in that: A groove (71) is provided at the bottom of the connecting plate (7), a limiting column (73) is movably installed inside the groove (71), and a second spring (72) is connected between one end of the limiting column (73) and the inner wall of the groove (71).

9. The LED splicing waterproof large screen device according to claim 8, characterized in that: A through hole (51) communicating with the accommodating cavity is provided at the bottom of the inserting plate (5), and the other end of the limiting column (73) passes through the through hole (51) and is located at the bottom of the inserting plate (5).

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