Light leakage prevention and ventilation prevention display module and display device

Abstract

The utility model provides a light leakage and ventilation prevention display module and a display device, and the light leakage and ventilation prevention display module comprises a fixed housing which is provided with a plurality of first ventilation holes in an array manner; the circuit substrate is laid on one side of the fixed shell, a plurality of second ventilation holes corresponding to the first ventilation holes are formed in the circuit substrate in an array mode, and a plurality of display elements are further arranged on the circuit substrate; the light-transmitting cover is laid on the circuit substrate, a plurality of third vent holes corresponding to the first vent holes and a plurality of light-transmitting holes corresponding to the display elements are formed in the light-transmitting cover, and emergent light of the display elements can be emitted from the light-transmitting holes; the light shield is laid on the other side of the fixed shell, and a plurality of light shield plates corresponding to the first vent holes and fourth vent holes staggered and crossed with the first vent holes are arranged on the light shield; the problem that in the prior art, a display screen independently arranged outdoors cannot give consideration to the wind resistance and the display effect is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of large-screen display, in particular to a light-leakage prevention and ventilation display module and a display device. Background Art

[0002] In this era where vision reigns supreme, large-screen display technology, with its excellent brightness, durability, and wide viewing angles, has become the preferred display tool in commercial spaces, pedestrian streets, and other public places. As people's pursuit of visual experience grows, the size of display screens is gradually developing towards larger and more shocking directions to meet people's desire for visual impact.

[0003] Especially in the outdoor display field, huge screens are often independently set up for advertising, information dissemination, etc. While transmitting information, they also become part of the urban landscape. Along highways, in order to capture the attention of passers-by, these display screens often have astonishing sizes. However, in these open outdoor environments, frequent strong winds pose a potential threat to these display screens. To resist the impact of strong winds, manufacturers usually set up exhaust holes on the display screens to ensure the safety and stability of the devices.

[0004] However, the existence of exhaust holes also brings new problems: light may enter through these holes, thereby affecting the display effect of the display screen, causing the picture to be unclear or distorted. This not only affects the information transmission effect but may also interfere with the visual experience of the audience. Therefore, there is an urgent need in the market for a display screen device that can effectively cope with the threat of strong winds and maintain excellent display effects. Summary of the Utility Model

[0005] In view of the above-mentioned disadvantages of the prior art, the technical problem to be solved by the utility model is to provide a light-leakage prevention and ventilation display module and a display device, so as to solve the problem that the outdoor independently set display screens in the prior art cannot take into account both the wind resistance and the display effect.

[0006] To solve the above technical problem, the utility model provides a light-leakage prevention and ventilation display module, including:

[0007] A fixed housing, on which a plurality of first ventilation holes are arrayed;

[0008] A circuit board, which is laid on one side of the fixed housing, and a plurality of second ventilation holes corresponding to the first ventilation holes are arrayed on the circuit board. A plurality of display elements are also arranged on the circuit board;

[0009] A light-transmitting cover is laid on the circuit board. A plurality of third ventilation holes corresponding to the first ventilation holes and a plurality of light-transmitting holes corresponding to the display elements are formed in the light-transmitting cover, and the emitted light of the display elements can be emitted from the light-transmitting holes.

[0010] A light-shielding cover is laid on the other side of the fixed housing. A plurality of light-shielding plates corresponding to the first ventilation holes and fourth ventilation holes that are staggeredly crossed with the first ventilation holes are provided on the light-shielding cover. A gap is provided between the light-shielding plates and the fixed housing to allow air to pass through the first ventilation holes and the fourth ventilation holes.

[0011] When observing the light-leakage-proof and air-permeable display module from the front, the light-shielding plates effectively block the interference light from being emitted from the back, avoiding the influence on the front display effect. At the same time, the air flowing through the light-leakage-proof and air-permeable display module can pass through the first ventilation holes, the second ventilation holes, the third ventilation holes, and the fourth ventilation holes, avoiding the influence of strong winds.

[0012] As a more preferred method, an installation groove adapted to the circuit board is provided on the fixed housing, and the circuit board is clamped in the installation groove.

[0013] As a more preferred method, a stepped structure is provided in the installation groove, and the circuit board is lapped on the stepped structure. The stepped structure provides a certain heat dissipation space between the circuit board and the bottom of the installation groove.

[0014] As a more preferred method, the light-shielding cover is directly lapped on the top of the installation groove.

[0015] As a more preferred method, the first ventilation holes, the second ventilation holes, the third ventilation holes, and the fourth ventilation holes are all rectangular holes with adapted sizes.

[0016] As a more preferred method, the light-shielding plates are rectangular plates adapted to the rectangular holes.

[0017] As a more preferred method, a wind guiding rib is provided in the middle of the rectangular plate, and the air flowing through the first ventilation holes is guided by the wind guiding rib to flow out of the fourth ventilation holes on both sides.

[0018] As a more preferred method, the light-leakage-proof and air-permeable display module further includes a handle, which is fixed on the light-shielding cover for convenient movement.

[0019] To solve the above problems, the present invention also provides a display device, including:

[0020] A plurality of the above-mentioned light-leakage-proof and air-permeable display modules, and the display elements of the plurality of the light-leakage-proof and air-permeable display modules together constitute the display screen of the display device.

[0021] As a more preferred embodiment, the display device further includes a plurality of adapter boxes, and the light-leakage-proof and air-permeable display modules are cascaded through the adapter boxes in pairs.

[0022] As described above, the light-leakage-proof and air-permeable display module and the display device of the present invention have the following beneficial effects: When the light-leakage-proof and air-permeable display module of the present invention is used during the day and observed from the front, the light-shielding plate effectively blocks the interference light from emitting from the back, avoiding the influence on the front display effect; at the same time, the air flowing through the light-leakage-proof and air-permeable display module can pass through the first ventilation hole, the second ventilation hole, the third ventilation hole and the fourth ventilation hole, balancing the air pressure on both sides of the display screen and avoiding the influence of strong winds; secondly, when used at night, the light-shielding plate also effectively ensures that the light emitted by the display element is difficult to pass through the first ventilation hole through diffuse reflection, so that the display angle on the front of the light-leakage-proof and air-permeable display module is controllable, avoiding light leakage and reducing the interference to the residents in the residential area at night and reducing light pollution.

[0023] The display device of the present invention is composed of a plurality of the above-mentioned light-leakage-proof and air-permeable display modules, meeting the outdoor requirements for large-screen display and size customization. At the same time, through the ventilation air duct formed by the first ventilation hole, the second ventilation hole, the third ventilation hole and the fourth ventilation hole on the light-leakage-proof and air-permeable display module, the passage of strong winds is realized, and the air pressure on both sides of the display screen is balanced; secondly, the light-shielding plate also reduces the interference of daytime light on the display effect and reduces the light pollution generated at night.

[0024] The light-leakage-proof and air-permeable display module and the display device of the present invention, through the ventilation air duct formed by the first ventilation hole, the second ventilation hole, the third ventilation hole and the fourth ventilation hole and the light-shielding plate, utilize the different characteristics of light propagation and air flow. While blocking the passage of light, it ensures the passage of flowing air, realizes the balance of air pressure on both sides of the display screen in strong wind weather, ensures the display effect, reduces light pollution, and solves the problem in the prior art that the outdoor independently set display screen cannot balance the wind resistance and the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It shows an exploded schematic view of the light-leakage-proof and air-permeable display module of the present invention;

[0026] Figure 2 It shows Figure 1 A partial enlarged view of area A;

[0027] Figure 3 It showsFigure 1 Partial enlarged view of region B;

[0028] Figure 4 Shown as Figure 1 Partial enlarged view of region C;

[0029] Figure 5 Shown as Figure 1 Partial enlarged view of region D;

[0030] Figure 6 Shown as the cross-sectional view of the light-leakage prevention and ventilation display module of the present utility model;

[0031] Figure 7 Shown as the exploded schematic view of the display device of the present utility model.

[0032] Description of component labels

[0033] 1 Light-leakage prevention and ventilation display module

[0034] 11 Fixed housing

[0035] 111 First ventilation hole

[0036] 112 Mounting groove

[0037] 112a Step structure

[0038] 113 Adapter groove

[0039] 12 Circuit board

[0040] 121 Second ventilation hole

[0041] 122 Display element

[0042] 13 Translucent cover

[0043] 131 Third ventilation hole

[0044] 132 Light-transmitting hole

[0045] 133 Light-shielding rib

[0046] 14 Light-shielding cover

[0047] 141 Fourth ventilation hole

[0048] 142 Light-shielding plate

[0049] 142a Air-guiding rib

[0050] 15 Handle

[0051] 16 Plug

[0052] 2 Adapter

[0053] 3 Junction Box Detailed Implementation Modes

[0054] The following specific embodiments illustrate the implementation modes of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0055] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limited conditions under which the present utility model can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is only limited by the claims of the published patent. The terms used herein are only for describing specific embodiments and are not intended to limit this application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "beneath", "lower part", "above", "upper part", etc., may be used in the text to facilitate the description of the relationship between one element or feature shown in the figure and another element or feature.

[0056] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed", "held" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0057] Furthermore, as used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of the described features, operations, elements, components, items, types, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, types, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or meaning either one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B and C". An exception to this definition only occurs when the combination of elements, functions or operations is inherently mutually exclusive in some way.

[0058] As shown in Figures 1 to 7 , the present utility model provides a light-leakage-proof and air-permeable display module 1, including:

[0059] A fixed housing 11, on which a plurality of first ventilation holes 111 are arrayed;

[0060] A circuit board 12, which is laid on one side of the fixed housing 11. A plurality of second ventilation holes 121 corresponding to the first ventilation holes 111 are arrayed on the circuit board 12, and a plurality of display elements 122 are also arranged on the circuit board 12;

[0061] A light-transmitting cover 13, which is laid on the circuit board 12. A plurality of third ventilation holes 131 corresponding to the first ventilation holes 111 and a plurality of light-transmitting holes 132 corresponding to the display elements 122 are opened on the light-transmitting cover 13, and the emitted light of the display elements 122 can be emitted from the light-transmitting holes 132;

[0062] A light-shielding cover 14, which is laid on the other side of the fixed housing 11. A plurality of light-shielding plates 142 corresponding to the first ventilation holes 111 and fourth ventilation holes 141 that are staggeredly crossed with the first ventilation holes 111 are arranged on the light-shielding cover 14. A gap for air to pass through the first ventilation holes 111 and the fourth ventilation holes 141 is provided between the light-shielding plates 142 and the fixed housing 11;

[0063] When observing the light-leakage-proof and air-permeable display module 1 from the front, the light-shielding plates 142 well block the interference light from being emitted from the back, avoiding the influence on the front display effect; at the same time, the air flowing through the light-leakage-proof and air-permeable display module 1 can pass through the first ventilation holes 111, the second ventilation holes 121, the third ventilation holes 131 and the fourth ventilation holes 141, avoiding the influence of strong wind.

[0064] To better introduce the light-leakage prevention and ventilation display module 1 of the present utility model, the following applications will be specifically described: When the light-leakage prevention and ventilation display module 1 of the present utility model is used during the day, when observing the light-leakage prevention and ventilation display module 1 from the front, the light-shielding plate 142 effectively blocks the interference light from emitting from the back, avoiding the influence on the front display effect; at the same time, the air flowing through the light-leakage prevention and ventilation display module 1 can pass through the first ventilation hole 111, the second ventilation hole 121, the third ventilation hole 131, and the fourth ventilation hole 141, balancing the air pressure on both sides of the display screen and avoiding the influence of strong winds; secondly, when used at night, the light-shielding plate 142 also effectively ensures that the emitted light of the display element 122 is difficult to pass through the first ventilation hole 111 through diffuse reflection, so that the display angle on the front of the light-leakage prevention and ventilation display module 1 is controllable, avoiding light leakage, reducing the interference to the residents in the residential area at night, and reducing light pollution.

[0065] In this embodiment, as Figure 1 , Figure 4 and Figure 6 shown, a plurality of light-shielding ribs 133 are further provided on the light-transmitting cover 13, and the light-shielding ribs 133 are arranged in parallel on both sides of the light-transmitting hole 132 to further limit the emitted light of the display element 122 from propagating forward.

[0066] In this embodiment, the display element 122 uses LED lamp beads, and this technology represents a major innovation in the lighting field. LED lamp beads have won wide recognition in the industry with their excellent performance and broad application prospects. In terms of energy efficiency, LED lamp beads efficiently convert electrical energy into light energy, and their conversion efficiency far exceeds that of traditional lighting technologies, thus significantly reducing energy consumption. Their extremely long service life, usually up to tens of thousands of hours, greatly reduces the replacement frequency and maintenance costs. LED lamp beads do not contain harmful substances such as mercury, are environmentally friendly, and produce less waste during production and use, reflecting their environmental protection characteristics; the fast response ability of LED lamp beads enables them to be quickly turned on and off, which is very suitable for occasions that require rapid brightness adjustment. They can emit light of various colors, and by precisely adjusting the current and voltage, the color and brightness of the light can be controlled, making them widely used in decorative lighting and signal indication. The small volume of LED lamp beads is convenient for integration into various products, providing greater flexibility and innovation space for lighting design. Since their structure does not contain fragile glass components, LED lamp beads are more resistant to impact and vibration, enabling them to work stably in harsh environments. The light emitted by LED lamp beads has directivity, which makes the utilization of light energy more efficient and reduces light waste. In addition, the heat generated by LED lamp beads during operation is relatively low, which helps to reduce the overall heat dissipation requirement and reduces the dependence on complex heat dissipation systems.

[0067] In this embodiment, as shown in Figure 1 , Figure 2 and Figure 6 , an installation groove 112 adapted to the circuit board 12 is provided on the fixed housing 11, and the circuit board 12 is clamped in the installation groove 112.

[0068] In this embodiment, as shown in Figure 1 , Figure 2 and Figure 6 , a step structure 112a is provided in the installation groove 112, the circuit board 12 is lapped on the step structure 112a, and the step structure 112a satisfies a certain heat dissipation space for the distance between the circuit board 12 and the bottom of the installation groove 112.

[0069] In this embodiment, as shown in Figure 1 , Figure 2 and Figure 6 , the light-shielding cover 14 is directly lapped on the top of the installation groove 112.

[0070] As a more preferable manner, the first ventilation hole 111, the second ventilation hole 121, the third ventilation hole 131, and the fourth ventilation hole 141 are all rectangular holes with adapted sizes; and the first ventilation hole 111, the second ventilation hole 121, the third ventilation hole 131, and the fourth ventilation hole 141 are evenly and symmetrically distributed, so as to achieve the maximum hollowing ratio and adapt to higher-level wind load.

[0071] In this embodiment, as shown in Figure 1 and Figure 5 , the light-shielding plate 142 is a rectangular plate adapted to the rectangular hole.

[0072] In this embodiment, as shown in Figure 1 , Figure 5 and Figure 6 , a wind guiding rib 142a is provided in the middle of the rectangular plate, and the air flowing through the first ventilation hole 111 flows out through the wind guiding rib 142a to the fourth ventilation holes 141 on both sides thereof.

[0073] In this embodiment, as shown in Figure 1 and Figure 7 , the light leakage-proof and air-permeable display module 1 further includes a handle 15, and the handle 15 is fixed on the light-shielding cover 14 for convenient movement; further, in this embodiment, fixing holes are sequentially formed on the light-shielding cover 14, the fixed housing 11, the circuit board 12, and the light-transmitting cover 13, and a threaded hole is provided on the handle 15, and the handle 15 is fixed to the light-shielding cover 14 by using screws to sequentially pass through the corresponding threaded holes.

[0074] The assembly of the light-leakage prevention and ventilation display module 1 of the present utility model includes the following steps: First, power on and test the circuit board 12 to confirm that the signal and power input are qualified and the display element 122 is not damaged; then spray a three-proof glue on the circuit board 12 to improve its reliability and durability in harsh environments; then, use an automatic screwdriver device to fix the circuit board 12 to the installation groove 112 of the fixed housing 11 from the front through self-tapping screws, and then use a potting machine to pot the front of the circuit board 12 and wait for the glue to cure; then, use an automatic screwdriver device to fix the light-transmitting cover 13 to the fixed housing 11 from the front through self-tapping screws; finally, install the light-shielding cover 14 and the handle 15 to complete the assembly of the light-leakage prevention and ventilation display module 1.

[0075] To solve the above problems, the present utility model also provides a display device, including:

[0076] A plurality of the above-mentioned light-leakage prevention and ventilation display modules 1, and the display elements 122 of the plurality of light-leakage prevention and ventilation display modules 1 together form the display screen of the display device.

[0077] To better introduce the display device of the present utility model, the following application is now specifically described: The display device of the present utility model is composed of a plurality of the above-mentioned light-leakage prevention and ventilation display modules 1, which meets the outdoor requirements for large-screen display and size customization. At the same time, through the ventilation air duct formed by the first ventilation hole 111, the second ventilation hole 121, the third ventilation hole 131 and the fourth ventilation hole 141 on the light-leakage prevention and ventilation display module 1, the passage of strong wind is realized, and the air pressure on both sides of the display screen is balanced; secondly, the light-shielding plate 142 also reduces the interference of daytime light on the display effect and reduces the light pollution generated at night; it can be seen that the light-leakage prevention and ventilation display module and the display device of the present utility model, through the ventilation air duct formed by the first ventilation hole 111, the second ventilation hole 121, the third ventilation hole 131 and the fourth ventilation hole 141 and the light-shielding plate 142, utilize the different characteristics of light propagation and air flow to ensure the passage of flowing air while blocking the passage of light, realizing the balance of air pressure on both sides of the display screen in strong wind weather, ensuring the display effect, reducing light pollution, and solving the problem that the outdoor independent display screen in the prior art cannot balance the wind resistance and the display effect.

[0078] In this embodiment, as Figure 7 shown, the display device further includes a plurality of adapter boxes 3, and the light-leakage prevention and ventilation display modules 1 are cascaded through the adapter boxes 3 in pairs.

[0079] Furthermore, in this embodiment, as Figure 1 and Figure 7As shown in the figure, transfer slots 113 are provided at both ends of the fixed housing 11, and connectors connected to the circuit board 12 are provided in the transfer slots 113; further, in this embodiment, the display device further includes a transfer member 2, and a module sealing ring and a foaming sealing ring are provided on the transfer member 2. The transfer member 2 is fixed to the transfer slot 113 by bolt connection. The module sealing ring is used to ensure the sealed connection between the transfer member 2 and the transfer slot 113. The transfer box 3 is fixed to two adjacent transfer members 2 at the same time to be fixed to the light-leakage-proof and air-permeable display module 1, and two adjacent light-leakage-proof and air-permeable display modules 1 are cascaded. The foaming sealing ring is used to ensure the sealed connection between the transfer member 2 and the transfer box 3; furthermore, for the transfer slots 113 corresponding to the edges or ends, there is no corresponding transfer box 3 to connect to it, and the display device covers the transfer slots 113 with plugs 16.

[0080] Further, in this embodiment, the light-shielding cover 14, the fixed housing 11, the light-transmitting cover 13, the handle 15 and the transfer member 2 are all made of polycarbonate and glass fiber reinforced materials to ensure the structural strength.

[0081] In summary, the light-leakage-proof and air-permeable display module and the display device of the present invention have the following advantages:

[0082] 1. Light-leakage prevention design: The light-shielding plate 142 on the light-shielding cover 14 effectively blocks interfering light, improves the display effect, and reduces light pollution at the same time.

[0083] 2. Air-permeable performance: The design of multiple ventilation holes allows air to flow, balances the wind pressure on both sides of the display screen, and improves the wind resistance.

[0084] 3. Structural stability: The combination of the fixed housing 11, the circuit board 12 and the light-transmitting cover 13 provides stable physical support.

[0085] 4. Heat dissipation optimization: The stepped structure 112a in the installation groove 112 provides a heat dissipation space for the circuit board 12 to prevent the device from overheating.

[0086] 5. Protection of the display element 122: The light-shielding edges 133 on the light-transmitting cover 13 further limit the light propagation of the display element 122 and enhance the display effect.

[0087] 6. Material selection: The use of polycarbonate and glass fiber reinforced materials ensures the strength and durability of the structure.

[0088] 7. Modular design: The design of the detachable power connection and wire management module facilitates installation and maintenance.

[0089] 8. Environmental adaptability: The use of the three-proof glue improves the reliability of the display module in harsh environments.

[0090] 9. Ease of installation: The use of automatic screw machines and glue filling machines simplifies the assembly process and improves production efficiency.

[0091] 10. Controllable display effect: The design of the light shielding plate 142 and the light transmissive holes 132 enables the control of the display angle, enhancing the user experience.

[0092] 11. Cascading of the adapter box 3: The use of the adapter box 3 allows multiple display modules to be cascaded, facilitating the construction of large-scale display devices.

[0093] Through its innovative design, the light leakage-proof and air-permeable display module 1 of this patent achieves the balance of air pressure by allowing air flow while maintaining the display effect, thereby improving the stability and safety of outdoor display screens. The design of the light shielding cover 14 and the light transmissive cover 13 effectively controls the propagation of light and reduces light pollution, while the design of multiple ventilation holes ensures air circulation and enhances the wind resistance of the display screen. In addition, the modular design and simple installation process make the display module easy to produce and maintain, and suitable for various outdoor display occasions. The use of polycarbonate and glass fiber reinforced materials, as well as the spraying of three-proof glue, further improves the durability and environmental adaptability of the display module. Generally speaking, the design of the display module of this patent solves the limitations of existing outdoor display screens in terms of wind resistance and display effect through its unique structure and material selection, providing an innovative solution for outdoor display technology. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0094] The above embodiments are only illustrative of the principles and effects of the utility model, and are not intended to limit the utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the utility model should still be covered by the claims of the utility model.

Claims

1. A light leakage and ventilation-proof display module (1), characterized in that: include: A fixed shell (11), wherein a plurality of first ventilation holes (111) are arranged in an array on the fixed shell (11); a circuit substrate (12), the circuit substrate (12) being laid on one side of the fixed housing (11), the circuit substrate (12) being provided with a plurality of second ventilation holes (121) in an array corresponding to the first ventilation holes (111), and the circuit substrate (12) being further provided with a plurality of display elements (122); a light-transmitting cover (13), the light-transmitting cover (13) being laid on the circuit substrate (12), the light-transmitting cover (13) being provided with a plurality of third ventilation holes (131) corresponding to the first ventilation holes (111) and a plurality of light-transmitting holes (132) corresponding to the display element (122), and the light emitted by the display element (122) can be emitted from the light-transmitting holes (132); A light shield (14), the light shield (14) being arranged on the other side of the fixed shell (11), the light shield (14) being provided with a plurality of light shielding plates (142) corresponding to the first ventilation holes (111) and fourth ventilation holes (141) staggered and intersecting with the first ventilation holes (111), and a gap being provided between the light shielding plates (142) and the fixed shell (11) to allow air to pass through the first ventilation holes (111) and the fourth ventilation holes (141).

2. The light leakage-proof and air-permeable display module (1) according to claim 1, characterized in that: The fixed housing (11) is provided with a mounting groove (112) adapted to the circuit substrate (12), and the circuit substrate (12) is clamped in the mounting groove (112).

3. The light leakage-proof and air-permeable display module (1) according to claim 2, characterized in that: A step structure (112a) is provided in the installation groove (112), the circuit substrate (12) is overlapped on the step structure (112a), and the step structure (112a) satisfies a heat dissipation space with a certain distance between the circuit substrate (12) and the bottom of the installation groove (112).

4. The light leakage-proof and air-permeable display module (1) according to claim 3, characterized in that: The light shield (14) is directly overlapped on the top of the installation groove (112).

5. The light leakage-proof and air-permeable display module (1) according to claim 1, characterized in that: The first ventilation hole (111), the second ventilation hole (121), the third ventilation hole (131) and the fourth ventilation hole (141) are all rectangular holes with matching sizes.

6. The light leakage-proof and air-permeable display module (1) according to claim 5, characterized in that: The shading plate (142) is a rectangular plate adapted to the rectangular hole.

7. The light leakage-proof and air-permeable display module (1) according to claim 6, characterized in that: An air guiding ridge (142a) is provided in the middle of the rectangular plate, and the air flowing through the first ventilation hole (111) is guided through the air guiding ridge (142a) to flow out to the fourth ventilation holes (141) on both sides thereof.

8. The light leakage-proof and air-permeable display module (1) according to claim 1, characterized in that: The light leakage-proof and air-permeable display module (1) further comprises a handle (15), wherein the handle (15) is fixed on the light shield (14) for easy movement.

9. A display device, characterized in that: include: A plurality of light leakage and air permeable display modules (1) as described in any one of claims 1 to 8, and display elements (122) of a plurality of the light leakage and air permeable display modules (1) together constitute a display screen of the display device.

10. The display device according to claim 9, characterized in that: The display device further comprises a plurality of adapter boxes (3), and pairs of the light leakage-proof and air-permeable display modules (1) are cascaded via the adapter boxes (3).

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