Arc-shaped LED display module

Abstract

The utility model aims to provide the arc-shaped LED display module, which can adopt the narrow hard plane LED lamp panel to realize the arc-shaped display of the LED display module, can realize the real radian line display picture in the strict sense, has the characteristic of strong weather resistance, is suitable for both indoor and outdoor use, and is particularly suitable for being applied to a naked eye 3D (three-dimensional) LED screen. Specifically, the arc-shaped LED display module comprises a module shell with the overall orthographic projection being rectangular and a display lamp panel with the overall orthographic projection being rectangular, at least three first bolt holes are formed in each of the two ends of the short edge of the module shell, and first locking bolts are arranged at the positions, corresponding to the first bolt holes, of the display lamp panel; the first bolt holes correspond to the first locking bolts in a one-to-one mode and are locked with the first locking bolts in a matched mode, and in the locking state, the cross section of the short edge of the display lamp panel is in an arc shape.

Description

Technical Field

[0001] The utility model relates to the field of display screens, and more specifically, to an arc-shaped LED display module. Background Art

[0002] Curved LED screens are important LED display configuration units for displaying naked-eye 3D LED images. The industry often uses display modules made of narrow, rigid, flat LED panels to create curved screens, or flexible, lightweight display modules to bend and assemble them. Curved screens made of display modules cannot achieve uniform distribution of 3D images along the curvature, as the image displayed on the screen is flat within the narrow display modules. This creates a planar block effect in the image display, affecting the quality of the 3D image. While curved display modules assembled from flexible, lightweight, and bendable modules can achieve 3D image requirements, their lightweight material strength does not meet weather resistance requirements. Flexible, lightweight display modules are particularly difficult to use for large outdoor screens.

[0003] For example, the application number is "202021753413.4" and the patent name is "A curved screen frame and LED curved screen". The curved screen frame includes 2 curved support plates, 2 connecting support plates, 4 L-shaped positioning blocks and a curved panel; the curved support plate has a curved edge, and the two ends of the connecting support plate are respectively connected to a curved support plate, and the connecting support plate and the curved support plate are fixedly connected by positioning blocks, and all the connecting support plates and the curved support plate are enclosed together; the curved panel is fixedly connected to the curved edge of the curved support plate; the curved panel is used to install the display module of the curved screen. This is essentially the "narrow rigid flat display modules spliced ​​into a curved screen" mentioned above, which cannot achieve uniform distribution display of 3D images along the curved line, and will cause a planar block effect of image display, affecting the quality of 3D images.

[0004] For example, the invention patent with application number "202018053.0" and invention name "Bendable LED Display Screen" discloses a bendable LED display screen, including a module body, a light board and a metal frame respectively provided on the module body, a conductive layer provided inside the light board, a protective resin layer provided at one end of the conductive layer, a PCB board provided at one end of the protective resin layer, a magnet outer frame fixedly mounted on the metal frame, a magnet provided inside the magnet outer frame, a first display screen body and a second display screen body respectively provided at the upper end of the module body, the surface of the first display screen body and the second display screen body are both provided with a grid film, and an upper polarizer is provided at one end of the grid film. The LED display screen provided in this invention uses a metal frame to improve the strength of the module body, and the protective resin layer inside the light board can improve the waterproof, dustproof and impact-resistant properties of the light surface of the LED display screen. However, the light board is essentially a display module assembled through a flexible, lightweight and bendable assembly. Although there is a metal frame as strength support, its weather resistance in outdoor occasions, especially in bad weather, is still a problem.

[0005] The extensive application of naked-eye 3D LED screens requires LED display modules to be able to adapt to all weather conditions and display 3D images uniformly in curved lines. Utility Model Content

[0006] The purpose of the present utility model is to provide a curved LED display module, which can adopt a narrow rigid flat LED display module. Through purely physical means, the curved display of the LED display module can be realized, and a true curved line display screen in the strict sense can be realized. At the same time, it has strong weather resistance and is suitable for both indoors and outdoors, and is particularly suitable for application on naked-eye 3D LED screens.

[0007] A curved LED display module includes a module shell having an overall rectangular shape in orthographic projection and a display light board having an overall rectangular shape in orthographic projection. At least two first bolt holes are provided at each end of a short side of the module shell, and first locking bolts are provided at positions corresponding to the first bolt holes on the display light board. The first bolt holes correspond to the first locking bolts one-to-one and cooperate with each other to lock. In the locked state, the cross-section of the short side of the display light board is arranged in an arc shape.

[0008] By adopting the above technical solution, through at least three first bolt holes and the first locking bolts corresponding thereto, when the two are locked, the corresponding ends of the display light board are made arc-shaped by controlling the locking force. When both ends have this structure, the entire display light board can have a certain arc structure, thereby realizing the arc display of the LED display module in a purely physical way, and realizing a true arc line display picture in the strict sense. At the same time, a hard screen display light board can be used, so that the display module has the characteristics of strong weather resistance, which is applicable both indoors and outdoors, and is particularly suitable for application on naked-eye 3D LED screens.

[0009] Preferably, the module shell has a plurality of second bolt holes evenly distributed along the length direction, and the display light board is provided with second locking bolts corresponding to the second bolt holes one by one. After the second bolt holes and the second locking bolts are locked together, the short side cross-sections of the display light board along the length direction are all arc-shaped.

[0010] By adopting the above technical solution, when the length of the display module is long enough, the locking structures at both ends alone cannot make the entire display module have an arc shape. Therefore, the second bolt hole and the second locking bolt provided in the length direction can make the entire display module have a uniform arc shape along the length direction.

[0011] Preferably, the module housing includes a metal plate and a plastic component, the metal plate includes support parts located at both ends of the short side and a connecting part connecting the support parts at both ends, the first bolt holes are arranged on the support parts at both ends, and the second bolt holes are arranged on the connecting part.

[0012] By adopting the above technical solution, the weight of the entire module housing can be reduced while maintaining sufficient strength. The overall production process is simple and the production cost is low.

[0013] Preferably, the metal plate is located at both ends of the short side and is provided with metal plate folds for protecting the display light board, and the metal plate folds cover the edges of the display light board.

[0014] Preferably, the plastic component is injection-molded and wrapped around the connecting portion, and plastic component folds for protecting the display light board are formed on both sides of the long side of the plastic component.

[0015] By adopting the above technical solution, in actual production, the connection between the module shell and the display light board can be filled with glue. The folded edges of the metal plate and the plastic component are used to protect the display light board on the one hand, and on the other hand, they act as a dam to prevent glue from overflowing.

[0016] Preferably, the display light board includes a PCB board and a plurality of pixel display lights fixedly arranged on the PCB board, and the first locking bolt is arranged on the PCB board.

[0017] By adopting the above technical solution, the first locking bolt is directly arranged on the PCB board, and a curved display module can be realized with a minimum of components, and the structure is simple.

[0018] Preferably, the metal plate is further provided with a locking platform with an open sandwich structure near the support portion, and the plastic component is partially embedded in the open sandwich structure during injection molding. The locking platform is provided with a locking hole, and the metal plate and the plastic component are locked by installing fasteners at the locking hole.

[0019] By adopting the above technical solution, the metal plate and the plastic component can be firmly matched to jointly support the display light board. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the overall structure of the curved display module Figure 1 ;

[0021] Figure 2 Schematic diagram of the overall structure of the curved display module Figure 2 ;

[0022] Figure 3 Schematic diagram of the structural explosion of the curved display module Figure 1 ;

[0023] Figure 4 Schematic diagram of the structural explosion of the curved display module Figure 2 ;

[0024] Figure 5 Schematic diagram of the structural explosion of the curved display module Figure 3 .

[0025] 1. Module housing; 10. Metal plate; 101. Support portion; 1011. First bolt hole; 102. Connecting portion; 1021. Second bolt hole; 103. Metal plate fold; 104. Locking platform; 11. Plastic component; 111. Plastic component folded edge;

[0026] 2. Display light board; 21. PCB board; 211. First locking bolt; 212. Second locking bolt. 3. Face shield. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-5 The utility model is further described.

[0028] like Figure 1-4 As shown, a curved LED display module includes a module housing 1 with an overall rectangular shape in orthographic projection, a display light board 2 with an overall rectangular shape in orthographic projection, and a mask 3 covering the display light board 2 and located on a side away from the module housing 1.

[0029] At least three first bolt holes 1011 are provided at both ends of the short side of the metal plate 10, and first locking bolts 211 are provided at the positions of the display light board 2 corresponding to the first bolt holes 1011. The first bolt holes 1011 and the first locking bolts 211 correspond one-to-one and lock with each other. In the locked state, the cross section of the short side of the display light board 2 is arranged in an arc shape. It should be noted here that in order to form an arc-shaped display light board 2, at least three pairs of first bolt holes 1011 and first locking bolts 211 should be provided. If the width of the display light board 2 is wider, more than three pairs can be used. In order to make the force on the entire display module uniform, the first bolt holes 1011 at both ends of the short side of the metal plate 10 are located in a one-to-one corresponding position.

[0030] The metal plate 10 has a plurality of second bolt holes 1021 evenly distributed along the length direction, and the display light board 2 is provided with second locking bolts 212 corresponding to the second bolt holes 1021. After the second bolt holes 1021 and the second locking bolts 212 are locked together, the short side cross-section of the display light board 2 along the length direction is all arranged in an arc shape. It should be noted here that when the length of the display module is short and the curvature of the display module arc is required to be small, the first bolt holes 1011 and the first locking bolts 211 can be provided at both ends of the short side of the metal plate 10; when the length of the display module is long enough and / or the curvature of the display module arc is required to be large, the locking structures at both ends alone cannot make the entire display module arc-shaped. Therefore, the second bolt holes 1021 and the second locking bolts 212 provided in the length direction can make the entire display module uniformly arc-shaped along the length direction. It should be noted that in the short side direction, the first bolt holes 1011 are preferably located on the same straight line; in the long side direction, the first bolt holes 1011 corresponding to the two ends of the short side have a second bolt hole 1021 located on the same straight line in the middle to ensure that the arc shape presented by the entire display module can maintain the same curvature.

[0031] It should be noted that the first bolt hole 1011 and the second bolt hole 1021 are preferably set as a locking column with an inner first bolt hole, and the first locking bolt 211 and the second locking bolt 212 are through holes in the PCB board 21 that are adapted to the shape and size of the inner first bolt hole of the locking column, and the locking column and the through hole of the PCB board 21 are locked together by bolts.

[0032] The first bolt hole 1011 and the second bolt hole 1021 can also be locking columns without the inner first bolt hole. The first locking bolt 211 and the second locking bolt 212 are through holes in the PCB board 21 that are adapted to the shape and size of the locking columns. The locking columns and the through holes in the PCB board 21 are locked by interference fit.

[0033] The module housing 1 includes a metal plate 10 and a plastic component 11. The metal plate 10 includes support portions 101 located at both ends of the short side and connecting portions 102 connecting the support portions 101 at both ends. First bolt holes 1011 are provided on the support portions 101 at both ends, and second bolt holes 1021 are provided on the connecting portions 102. It should be noted here that the entire module housing 1 can be entirely made of metal plates 10 or entirely made of plastic components 11. When entirely made of metal plates 10, the entire LED display module is heavy, inconvenient to install, and has a high manufacturing cost. When entirely made of plastic components 11, the installation strength of the display module is insufficient. Therefore, it is preferred that the metal plate 10 and the plastic component 11 are combined to form the module housing 1. This can reduce the weight of the entire module housing 1 while maintaining sufficient strength. The overall production process is simple and the production cost is low. In addition, this connecting part 102 is preferably a straight rod-shaped structure, which is integrally formed between the support parts 101 at both ends of the short side. If three first bolt holes 1011 are provided on the support part 101 of one of the short sides along the short side direction, then the connecting part 102 is preferably three connecting rods, and the second bolt holes 1021 are evenly distributed on the connecting part 102, and the first bolt holes 1011 at both ends of the connecting part 102 are located on the same straight line.

[0034] The metal plate 10 is provided with metal plate folds 103 at both ends of the short side for protecting the display light board 2. The metal plate folds 103 cover the edges of the display light board 2. The plastic component 11 is injection molded and wrapped around the connecting portion 102. Plastic component folds 111 are formed on both sides of the long side of the plastic component 11 for protecting the display light board 2. At the same time, the metal plate 10 is also provided with a lock box hole 105. The plastic component 11 is provided with a plastic component hole corresponding to the lock box hole 105. The lock box hole 112 and the plastic component hole are locked by bolts, so that the metal plate 10, plastic component 11, and display light board 2 are locked to each other. The metal plate folds 103 and the plastic component folds 111 can remain flush to make the entire display module look relatively beautiful. The metal plate folds 103 should have a chamfered structure on the side facing the display light board 2 to prevent injuries to the operator during installation due to the sharpness of the metal plate 10. In actual production, the connection between the module housing 1 and the display light board 2 can be glued. The metal plate folding edge 103 and the plastic component folding edge 111 are used to protect the display light board 2 on the one hand, and act as a dam to prevent glue from overflowing on the other hand.

[0035] The display light board 2 includes a PCB board 21 and a plurality of pixel display lights fixedly mounted on the PCB board 21. The first locking bolt 211 and the second locking bolt 212 are both mounted on the PCB board 21. It should be noted that the PCB board 21 is a thin (1.0mm-1.2mm thick) fiber-based copper board that can be bent at a small angle. The surface of the display pixel light point is parallel to the surface of the PCB board 21. A driver IC and electrical connectors are also provided on the other side of the PCB board 21 for connecting to an external circuit and controlling the image on the display light board 2 (the external circuit is not shown in the figure). It should be noted that a connecting plate can also be added between the PCB board 21 and the module housing 1. The PCB board 21 is fixed on the connecting plate, and then the first locking bolt 211 and the second locking structure are both arranged on the connecting plate. However, this will increase production costs and make installation complicated. Therefore, the first locking bolt 211 and the second locking structure are directly arranged on the PCB board 21 to reduce production costs and installation steps.

[0036] The mask 3 is arranged in an arc shape as a whole, and its curvature is the same as that of the display light board 2, and the center of the mask 3 coincides with the center of the display light board 2. The mask 3 is fixedly connected to the module housing 1 by bolts.

[0037] The metal plate 10 is further provided with a locking platform 104 with an open sandwich structure near the support portion 101. The plastic component 11 is partially embedded in the open sandwich structure during injection molding. The locking platform 104 is provided with a locking hole. The metal plate 10 and the plastic component 11 are locked together by installing fasteners at the locking hole. It should be noted here that the locking platform 104 may not be provided, and the plastic component 11 may be directly connected to the metal plate 10 by wrapping the connecting portion 102. In order to prevent the plastic component 11 from being affected by deformation due to thermal expansion and contraction, a locking platform 104 is provided near the supporting portion 101. During molding, the plastic component 11 is partially embedded in the sandwich structure with an opening of the locking platform 104, and then the locking platform 104 and the plastic component 11 are fastened by fasteners (such as bolts), thereby achieving a reliable connection between the metal plate 10 and the plastic component 11, and also avoiding the influence of deformation of the plastic component 11 due to thermal expansion and contraction, which may cause a gap between the metal plate 10 and the plastic component 11.

[0038] The specific production process of the curved LED display module is as follows:

[0039] S1. A metal sheet is punched into a metal plate 10 by stretching, and then surface treated. The metal plate 10 is preferably a stretched aluminum plate;

[0040] S2. The surface treated metal plate 10 is placed in a plastic mold, and the metal plate 10 is molded by an injection molding machine into a plastic member 11, and the injection molding material is made of PC plus fiber material;

[0041] S3. The metal plate 10 with the plastic member 11 is placed into the mask mold 3, injection molding the metal plate 10 with the mask 3, the mask 3 preferably uses PC plus fiber material;

[0042] S4. Pour thermally conductive sealant into the module housing 1, then place the PCB board 21 with the pixel lights and IC electrical components soldered to it into the module housing 1. The PCB board 21 should be a thin sheet material with a thickness between 1.0mm and 1.2mm. Use screws to tighten the first bolt hole 1011 and the first locking bolt 211, and the first bolt hole 1011 and the second locking bolt 212. With the screws tightening, the PCB board 21 forms an arc shape in the cross-section of the short side. The pixel lights on the PCB board 21 have a flat surface and are evenly spaced on the PCB board 21. After the PCB board 21 is tightened into an arc shape, the surfaces of the pixel lights also form an arc shape as a whole, and the centers of the spheres corresponding to the arc surfaces formed by the pixel lights and the arc surface formed by the PCB board 21 coincide with each other.

[0043] S5. First, inject sealant into the module housing 1 with the PCB board 21 assembled. Then, use screws to secure the mask 3 to the module housing 1. The mask 3 is tightly attached to the PCB board 21. Since the PCB board 21 is curved, the mask 3 also forms a curved surface under the action of the PCB board 21. The center of the sphere corresponding to the curved surface of the mask 3 coincides with the center of the curved surface formed by the PCB board 21, thereby achieving a truly curved line display in the strict sense.

[0044] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A curved LED display module, comprising a module housing whose orthographic projection is a rectangular shape as a whole and a display light panel whose orthographic projection is a rectangular shape as a whole, characterized in that: At least two first bolt holes are provided at both ends of the short side of the module shell, and first locking bolts are provided at the positions of the display light board corresponding to the first bolt holes. The first bolt holes and the first locking bolts correspond one to one and are locked together. In the locked state, the cross-section of the short side of the display light board is set in an arc shape.

2. The curved LED display module according to claim 1, characterized in that: The module shell is evenly distributed with a number of second bolt holes along the length direction, and the display light board is provided with second locking bolts corresponding to the second bolt holes one by one. After the second bolt holes and the second locking bolts are tightened and matched, the short side cross-sections of the display light board along the length direction are all arc-shaped.

3. The curved LED display module according to claim 2, wherein: The module housing includes a metal plate and a plastic component. The metal plate includes support parts located at both ends of a short side and a connecting part connecting the support parts at both ends. The first bolt holes are set on the support parts at both ends, and the second bolt holes are set on the connecting part.

4. The arc-shaped LED display module according to claim 3, characterized in that: The metal plate is located at both ends of the short side and is provided with a metal plate folding edge for protecting the display light board, and the metal plate folding edge covers the edge of the display light board.

5. The arc-shaped LED display module according to claim 3, characterized in that: The plastic component is injection-molded and wrapped around the connecting portion. Plastic component folding edges for protecting the display light board are formed on both sides of the long side of the plastic component.

6. The arc-shaped LED display module according to claim 1, characterized in that: The display light board includes a PCB board and a plurality of pixel display lights fixedly arranged on the PCB board, and the first locking bolt is arranged on the PCB board.

7. The arc-shaped LED display module according to claim 4, characterized in that: The metal plate is also provided with a locking platform with an open sandwich structure near the support part. The plastic component is partially embedded in the open sandwich structure during injection molding. The locking platform is provided with a locking hole. The metal plate and the plastic component are locked by installing fasteners at the locking hole.

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