Glue pouring jig for LED display module

Abstract

The utility model discloses a glue pouring jig for an LED display module, which comprises a base and a dismounting plate, a cavity is concavely arranged on one side of the base, an annular support step is arranged in the cavity, and a glue overflowing groove surrounding the annular support step is further arranged in the cavity; the annular supporting step comprises a first step face and a second step face which are sequentially and horizontally arranged from inside to outside, the LED display module is arranged on the first step face, the height of the upper surface of the LED display module in the vertical direction is larger than that of the second step face, and the height of the second step face in the vertical direction is larger than that of the first step face. The maximum length and width size of the horizontal projection of the first step surface is greater than the length and width size of the LED display module; wherein a plurality of first through holes are further formed in the annular supporting step, a plurality of ejector pins are arranged on the dismounting plate, the dismounting plate and the base are correspondingly matched and positioned, and the LED display module is ejected out of the annular supporting step through the ejector pins penetrating through the first through holes.

Description

Technical Field

[0001] This utility model relates to the field of LED processing technology, and in particular to a potting fixture for LED display modules. Background Technology

[0002] In recent years, with the continuous improvement of LED display technology, the pixel pitch of outdoor LED displays has been further reduced. A smaller pixel pitch means a smaller optimal viewing distance, resulting in a clearer image for the same size display. This increases the likelihood of user interaction with the screen, expanding the application scope of these small-pitch displays in outdoor environments. Examples include applications in pedestrian streets, shopping mall window displays and advertising machines, as well as bus shelters, newsstands, community information kiosks, gas stations, shopping kiosks, and parking lots.

[0003] As a result, traditional outdoor LED display products can no longer meet the needs of the niche market, and the market demand for outdoor LED displays with smaller pitch is increasing, leading to the emergence of outdoor small-pitch LED displays.

[0004] However, small-pitch LED display modules have high requirements for R&D technology. The waterproof and dustproof design scheme of traditional outdoor LED display modules, which uses module potting and cover screw fixing, is difficult to apply to small-pitch LED display module products.

[0005] In current technology, traditional outdoor display module potting methods typically employ silicone encapsulation. These modules mainly consist of two parts: the display module PCBA and the structural base shell. The structural base shell can be either a blind base shell or a non-blind base shell. The waterproofing and dustproofing method for the LED display module involves embedding the display module within the structural base shell. The potting equipment applies liquid silicone from the front of the display module to the gaps between the LED chips, with the potting height not exceeding the highest point of the LEDs. Because the display module is embedded in the structural base shell, the liquid silicone will not overflow due to its fluidity, nor will it spill onto the back of the display module. After the silicone cures, the solid silicone covers the exposed solder leads and PCB pads of the LED components on the front of the display module. Display modules using a blind base shell have a sealed back structure and do not require additional potting for sealing. Non-blind base shell modules, however, require additional silicone potting. This silicone potting process seals all components of the display module within the silicone, thus resisting harsh outdoor environments and ensuring the waterproof and dustproof functionality of the LED display module.

[0006] However, this traditional encapsulation process for display modules can generally only be applied to LED display modules with a pitch greater than or equal to 2.5mm. Once the pitch of the LED display modules is less than 2.5mm, it is difficult to make the bottom shell of the display module into an embedded design. Without a bottom shell structure to restrict the overflow of liquid silicone from the edges of the display module, it is impossible to wrap the LED beads at the edges of the display module. Furthermore, the smaller the pitch of the LED display modules, the thinner the adhesive thickness that can be wrapped around the LED display module [theoretical adhesive thickness < (LED display module pitch - LED length (width) dimension) / 2]. For example, if the LED display module pitch P = 2.0mm and the LED length (width) dimension = 1.5mm, then the theoretical adhesive thickness is: (2.0-1.5) / 2 = 0.25mm. At this point, the thin and soft solid silicone cannot effectively protect against mechanical damage during production and installation and long-term outdoor working environments, and the LED display module has the potential risk of waterproofing failure. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a potting fixture for LED display modules, so as to solve the technical problems of poor reliability and spacing limitation of LED display modules prepared by traditional silicone potting method.

[0008] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a potting fixture for an LED display module, characterized in that it includes: a base and a disassembly plate, a cavity is recessed on one side of the base, an annular support step for supporting the LED display module is provided in the cavity, and an overflow groove is also provided around the annular support step in the cavity; the annular support step includes a first step surface and a second step surface arranged horizontally from the inside to the outside, the LED display module is disposed on the first step surface, the height of the upper surface of the LED display module in the vertical direction is greater than that of the second step surface, the height of the second step surface in the vertical direction is greater than that of the first step surface, and the maximum length and width dimensions of the horizontal projection of the first step surface are greater than the length and width dimensions of the LED display module;

[0009] The annular support step is provided with multiple first through holes, and the disassembly plate is provided with multiple ejector pins. The disassembly plate is matched and positioned with the base so that the LED display module can be ejected from the annular support step by passing through the multiple first through holes with the multiple ejector pins.

[0010] Furthermore, in the potting fixture for LED display modules described in this utility model, the disassembly plate is provided with a first positioning post, and the base is provided with a first positioning hole corresponding to and matching the first positioning post.

[0011] Furthermore, in the potting fixture for LED display modules described in this utility model, a plurality of the ejector pins are detachably connected to the disassembly plate.

[0012] Furthermore, the potting fixture for LED display modules described in this utility model also includes a limiting plate. The length and width of the limiting plate are smaller than the length and width of the LED display module, and limiting pieces are provided on all four sides of the limiting plate. The thickness of the limiting pieces is smaller than the gap between adjacent LED beads of the LED display module.

[0013] Furthermore, in the potting fixture for LED display modules described in this utility model, the limiting pieces on the adjacent sides of the limiting plate are connected end to end, and the top of the limiting piece protrudes from the upper surface of the limiting plate.

[0014] Furthermore, in the potting fixture for LED display modules described in this utility model, the surface of the limiting piece is covered with polytetrafluoroethylene.

[0015] Furthermore, in the potting fixture for LED display modules described in this utility model, the surface of the base is covered with polytetrafluoroethylene.

[0016] Furthermore, in the potting fixture for LED display modules described in this utility model, the overflow groove is provided with a plurality of second through holes.

[0017] Furthermore, in the potting fixture for LED display modules described in this utility model, the annular support step is provided with a second positioning post for matching and positioning with the positioning hole of the LED display module.

[0018] Furthermore, in the potting fixture for LED display modules described in this utility model, the base is also provided with a plurality of third through holes, the plurality of third through holes being located on the top surface of the base, and the height of the top surface of the base in the vertical direction is equal to the height of the second step surface in the vertical direction.

[0019] The beneficial effects of this invention are as follows: The inventor has optimized the design of a potting fixture for LED display modules. Through structural optimization, an annular support step is constructed and designed within the cavity of the fixture's base. This annular support step supports the LED display module and improves the potting effect. Although the silicone potting process is still used, the actual size of the LED display module prepared using this potting fixture is larger than the design size. This is because the potting adhesive covers the edges of the LED display module, ensuring that the PCB sides of the LED display module will not be corroded, oxidized, delaminated, or cracked under harsh outdoor conditions, thus protecting the normal operation of the LED display module. Therefore, the potting fixture designed in this invention can effectively complement traditional potting processes to produce small-pitch display modules without pitch limitations. The resulting LED display modules have superior reliability and can effectively adapt to harsh outdoor environments, demonstrating good prospects for promotion and application value.

[0020] Furthermore, in practical applications, the limiting plate can be placed on the upper surface of the LED display module, and the limiting pieces around the limiting plate can be placed in the gap between adjacent LED beads of the LED display module, so that the limiting pieces, the LED display module, and the annular support step can surround and form an annular potting groove, thereby ensuring the flow range of potting adhesive around the LED display module.

[0021] Meanwhile, after the LED display module is potted with glue using the aforementioned base, multiple ejector pins on the disassembly plate can be inserted into the first through hole of the annular support step to push the LED display module out of the annular support step, thus facilitating disassembly. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the potting fixture for LED display modules according to one embodiment of the present invention.

[0023] Figure 2 This is a front view of the structure of the potting fixture for LED display modules described in this utility model, with the disassembled plate hidden, in one embodiment.

[0024] Figure 3 for Figure 2 The AA section view of the glue-pouring fixture shown.

[0025] Figure 4 for Figure 3 The enlarged view of point E shown.

[0026] Figure 5 for Figure 2 The BB cross-sectional view of the glue-pouring fixture shown.

[0027] Figure 6 for Figure 5 The enlarged view of point F shown.

[0028] Figure 7 for Figure 2 The CC section view of the glue-pouring fixture shown.

[0029] Figure 8 for Figure 7 The enlarged view of point G shown.

[0030] Figure 9 This is a top view of the potting fixture for LED display modules according to one embodiment of the present invention, with the limiting plate removed.

[0031] Figure 10 for Figure 9 The DD cross-sectional view of the glue-pouring fixture shown.

[0032] Figure 11 for Figure 10 A magnified view of a portion at point H shown.

[0033] Figure 12 This is a schematic diagram of the structure of the potting fixture for LED display modules described in this utility model, showing the matching of the base with the LED display module in one embodiment.

[0034] Figure 13 This is a schematic diagram of the base of the potting fixture for LED display modules described in this utility model, according to one embodiment.

[0035] Label Explanation:

[0036] 1. Base; 11. Cavity; 111. Glue overflow groove; 112. Second through hole; 12. Third through hole; 13. First positioning hole;

[0037] 2. LED display module; 21. PCBA board; 22. LED beads;

[0038] 3. Annular support step; 31. First step surface; 32. Second step surface; 33. First through hole;

[0039] 4. Disassembly plate; 41. Ejector pin; 42. First positioning post;

[0040] 5. Second positioning post;

[0041] 6. Limiting plate; 61. Limiting piece;

[0042] 7. Screws;

[0043] 8. Copper pillar. Detailed Implementation

[0044] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0045] Research has found that, in current technology, the traditional silicone potting process seals all components of the display module inside silicone to resist harsh outdoor environments and ensure the waterproof and dustproof function of the LED display module. However, this traditional display module potting process can generally only be applied to LED display modules with a pitch greater than or equal to 2.5mm. Once the pitch of the LED display module is less than 2.5mm, it is difficult to make the bottom shell of the display module into an embedded design, and there is no bottom shell structure to restrict the overflow of liquid silicone from the edges of the LED display module, which cannot cover the LED beads at the edges of the display module. In this case, the thin and soft solid silicone cannot effectively protect against mechanical damage during production and installation and long-term outdoor working environment, and the LED display module has the potential risk of waterproof failure.

[0046] Therefore, in order to solve the problems existing in the above-mentioned prior art, such as Figure 1-13 As shown, this utility model designs a new potting fixture for LED display modules, which applies traditional potting processes. Specifically, it can use two-component epoxy glue or one-component epoxy glue as the glue for potting, and solves the problems of spacing limitation and poor reliability of display modules formed by the above-mentioned traditional potting methods.

[0047] In this utility model, the potting fixture for LED display modules includes:

[0048] The base 1 and the disassembly plate 4 are provided. A cavity 11 is recessed on one side of the base 1. An annular support step 3 for supporting the LED display module 2 is provided in the cavity 11. An overflow groove 111 is also provided around the annular support step 3. The annular support step 3 includes a first step surface 31 and a second step surface 32 arranged horizontally from the inside to the outside. The LED display module 2 is disposed on the first step surface 31. The height of the upper surface of the LED display module 2 in the vertical direction is greater than that of the second step surface 32. The height of the second step surface 32 in the vertical direction is greater than that of the first step surface 31. The maximum length and width of the horizontal projection of the first step surface 31 are greater than the length and width of the LED display module 2.

[0049] The annular support step 3 is provided with a plurality of first through holes 33, and the disassembly plate 4 is provided with a plurality of ejector pins 41. The disassembly plate 4 is matched and positioned with the base 1 so that the LED display module 2 can be ejected from the annular support step 3 by passing the plurality of ejector pins 41 through the plurality of first through holes 33.

[0050] As can be seen from the above description, in this utility model, the inventor has optimized the design of a potting fixture for LED display modules. By optimizing the structure of the base 1 of the potting fixture, an annular support step 3 is constructed and designed in the cavity 11 structure of the base 1 of the potting fixture. The annular support step 3 is used to support the LED display module 2 and improve the potting effect of the LED display module 2.

[0051] It should be noted that, as Figure 13 As shown, in this utility model, the annular support step 3 includes a first step surface 31 and a second step surface 32 arranged horizontally from the inside to the outside. The LED display module 2 is disposed on the first step surface 31. The height of the upper surface of the LED display module 2 in the vertical direction is greater than that of the second step surface 32. The height of the second step surface 32 in the vertical direction is greater than that of the first step surface 31. The maximum length and width of the horizontal projection of the first step surface 31 are greater than the length and width of the LED display module 2.

[0052] Based on this setup, during the potting process, the LED display module 2 can be placed on the fixed support step plane, and the outermost ring of the lower surface of the LED display module 2 (the outer surface of the PCBA board 21) is in contact with the first step surface 31. The LED display module 2 can be connected to the base 1 by mechanical connection or other connection methods, so that the contact surfaces of the two are tightly fitted, thereby embedding the LED display module 2 into the cavity 11. At this time, the height of the upper surface of the LED display module 2 is higher than that of the second step surface 32, and the maximum length and width of the horizontal projection of the first step surface 31 are greater than the length and width of the LED display module 2. Therefore, an annular potting groove will be formed between the first step surface 31 (LED display module support surface), the second step surface 32 (potting limit step surface) and the four edges of the LED display module 2. At this time, the operator can control the glue to be potted from the front of the LED display module 2 into the potting groove. Based on this, the actual size of the LED display module 2 is greater than the design size. That is, the four edges of the LED display module 2 are covered with potting glue. The protective function of the potting glue can ensure that the PCB side of the LED display module 2 will not be corroded, oxidized, delaminated, cracked and fail under harsh outdoor natural conditions, thus protecting the normal operation of the LED display module 2.

[0053] Therefore, it can be seen that the potting fixture designed by this utility model can effectively cooperate with the traditional potting process to produce small-pitch display modules. There is no pitch limitation, and the final LED display module 2 has better reliability and can effectively adapt to harsh outdoor environments. It has good promotion prospects and application value.

[0054] Furthermore, in the potting fixture for LED display modules described in this utility model, the disassembly plate 4 is provided with a first positioning post 42, and the base 1 is provided with a first positioning hole 13 that corresponds to and matches the first positioning post 42.

[0055] In the above technical solution of this utility model, the reason for providing multiple first through holes 33 in the annular support step 3 is to facilitate the subsequent removal of the LED display module 2 from the base 1. Figure 1 and Figure 10 As shown, in practical applications, the potting fixture designed in this utility model is also equipped with a disassembly plate 4, and the disassembly plate 4 is equipped with multiple ejector pins 41. These ejector pins 41 can correspond one-to-one with the first through hole 33. After the LED display module 2 has been potted and cured, when the operator wants to disconnect the connection between the LED display module 2 and the base 1, the ejector pins 41 on the disassembly plate 4 can pass through the first through hole 33 by matching and positioning the disassembly plate 4 with the base 1, so that the LED display module 2 can be ejected from the inner cavity of the base 1.

[0056] Of course, in order to ensure that the first through hole 33 and the ejector pin 41 can be effectively aligned, in practical applications, the first positioning post 42 can also be set on the four corners of the disassembly plate 4 so as to match and position the first positioning post 42 with the first positioning hole 13 opened on the base 1.

[0057] Furthermore, in the potting fixture for LED display modules described in this utility model, a plurality of ejector pins 41 are detachably connected to the disassembly plate 4.

[0058] In the above technical solution of this utility model, considering that the ejector pin 41 provided on the disassembly plate 4 may be unable to be inserted into the first through hole 33 due to bending after long-term use, the ejector pin 41 can be detachably connected to the disassembly plate 4 so that the operator can replace the damaged ejector pin 41 in time.

[0059] Furthermore, the potting fixture for LED display modules described in this utility model also includes a limiting plate 6. The length and width of the limiting plate 6 are smaller than the length and width of the LED display module 2, and the limiting plate 6 is provided with limiting pieces 61 on all four sides. The thickness of the limiting pieces 61 is smaller than the gap between adjacent LED beads of the LED display module 2.

[0060] Furthermore, in the potting fixture for LED display modules described in this utility model, the limiting pieces 61 on the adjacent sides of the limiting plate 6 are connected end to end, and the top of the limiting piece 61 protrudes from the upper surface of the limiting plate 6.

[0061] In the above technical solution of this utility model, a limiting plate 6 can also be preferably provided. The length and width of the limiting plate 6 are smaller than the length and width of the LED display module 2, and the limiting plate 6 is provided with limiting pieces 61 on all four sides. The limiting pieces 61 can be specifically selected as steel pieces, and the limiting pieces 61 are provided with multiple fixing round holes so that the limiting pieces 61 can be fixed on all four sides of the limiting plate 6 by passing bolts through the fixing round holes.

[0062] Among them, the two adjacent limiting pieces 61 can be connected end to end to form an annular limiting structure. In actual application, the thickness of the limiting piece 61 needs to be less than the gap between adjacent LED beads of the LED display module 2, and the top of the limiting piece 61 needs to protrude from the upper surface of the limiting plate 6. Thus, during the potting process, when the limiting plate 6 is placed on the upper surface of the LED display module 2 (the outer surface of the LED beads 22), the end of the limiting piece 61 protruding from the limiting frame is placed between the gaps between adjacent LED beads of the LED display module 2. At this time, the limiting piece 61 can surround the annular support step 3 and the LED display module 2 to form another annular potting groove, thereby ensuring that the liquid potting glue will not overflow into the gaps of the LED beads 22 in the middle part of the LED display module 2.

[0063] Furthermore, in the potting fixture for LED display modules described in this utility model, the surface of the limiting piece 61 is covered with polytetrafluoroethylene.

[0064] Furthermore, in the potting fixture for LED display modules described in this utility model, the surface of the base 1 is covered with polytetrafluoroethylene.

[0065] In the above-described technical solution of this utility model, to prevent the adhesive from adhering to the surfaces of the base 1 and the limiting piece 61, in practical applications, the surfaces of both the limiting piece 61 and the base 1 can be electroplated with polytetrafluoroethylene (PTFE) to improve the potting effect of the LED display module 2. The electroplating with PTFE is known to those skilled in the art and will not be elaborated upon here.

[0066] Furthermore, in the potting fixture for LED display modules described in this utility model, the overflow groove 111 is provided with a plurality of second through holes 112.

[0067] In the above-mentioned technical solution of this utility model, multiple second through holes 112 can be opened in the overflow groove 111. The second through holes 112 can be regarded as overflow holes. When the glue overflows from the annular support step 3 of the base 1 and flows into the overflow groove 111, the glue can flow out from the circular overflow hole, thereby avoiding the glue level in the overflow groove being too high and causing defects in the LED display module 2 produced.

[0068] Furthermore, in the potting fixture for LED display modules described in this utility model, the annular support step 3 is provided with a second positioning post 5 for matching and positioning with the positioning hole of the LED display module.

[0069] In the above technical solution of this utility model, considering that the LED display module 2 needs to be positioned and disposed in the annular support step 3, and that the lower surface of the LED display module 2 (the outer surface of the PCBA board 21) can ultimately contact the first step surface 31 of the annular support step 3, the LED display module 2 includes the PCBA board 21 and LED beads 22, with the LED beads 22 disposed on the PCBA board 21. To improve the positioning accuracy between the annular support step 3 and the LED display module 2, in practical applications, a second positioning post 5 can be provided in the support step, and the LED display module 2 can be provided with a positioning hole corresponding to the second positioning post 5, so that the LED display module 2 and the annular support step 3 are matched and positioned together through the matching relationship between the second positioning post 5 and the positioning hole.

[0070] In addition, in practical applications, multiple copper pillars 8 can be soldered on the lower surface (IC surface) of the PCBA board 21 of the LED display module 2, so that the base 1 can be mechanically connected to the copper pillars 8 by screws 7 passing through the base 1, thereby fixing the LED display module 2 on the base 1.

[0071] Furthermore, in the potting fixture for LED display modules described in this utility model, the base 1 is also provided with a plurality of third through holes 12, the plurality of third through holes 12 are provided on the top surface of the base 1, and the height of the top surface of the base 1 in the vertical direction is equal to the height of the second step surface 32 in the vertical direction.

[0072] In the above-described technical solution of this utility model, in practical application, to improve the potting effect of the potting fixture, multiple third through holes 12 can be provided on the top surface of the base 1, and the height of the top surface of the base 1 in the vertical direction can be controlled to be equal to the height of the second step surface 32 in the vertical direction. Based on this setting, when the potting adhesive used in this solution is a single-component epoxy adhesive, a high-temperature tunnel oven (around 120°C) is required for curing. The multiple third through holes 12 can effectively reduce the thickness of the base, thereby increasing the air contact area and making the heat dissipation and heat absorption of the base as gradual as possible.

[0073] Example 1:

[0074] like Figures 1-13As can be seen, Embodiment 1 of this utility model is: a potting fixture for an LED display module, the potting fixture comprising: a base 1, a limiting plate 6, and a disassembly plate 4. The LED display module 2 comprises a PCBA board 21 and LED beads 22, the LED beads 22 being disposed on the PCBA board 21.

[0075] The base 1 has a cavity 11 recessed on one side, and the cavity 11 has an annular support step 3 for supporting the LED display module 2. The cavity 11 also has an overflow groove 111 surrounding the annular support step 3. The annular support step 3 includes a first step surface 31 and a second step surface 32 arranged horizontally from the inside to the outside. The first step surface 31 and the second step surface 32 are connected together by a vertical step surface.

[0076] In this embodiment, the LED display module 2 is disposed on the first step surface 31. The height of the upper surface of the LED display module 2 in the vertical direction is greater than that of the second step surface 32. The height of the second step surface 32 in the vertical direction is greater than that of the first step surface 31. Furthermore, the maximum length and width dimensions of the horizontal projection of the first step surface 31 are greater than the length and width dimensions of the LED display module 2.

[0077] like Figure 5 As shown, L1 is the theoretical dimension of the LED display module 2 in the length direction, which is equal to the spacing between the center lines of adjacent LED beads in the LED display module 2 × the number of LED beads in the length direction of the LED display module 2; L2 is the actual dimension of the LED display module 2 in the length direction, which is smaller than the theoretical dimension, i.e., L1-L2≈(0.1~0.2)mm; and L3 is the design dimension of the LED display module 2 in the length direction. Unlike conventional indoor display modules, the design dimension of outdoor display modules should be smaller than the actual dimension of the display module. Without affecting the welding of the outermost LED beads, the shape of the display module should be as close as possible to the edge of the outermost LED beads. That is, L3≈LED display spacing × (number of LED beads in the length direction of the display module - 1) + LED length direction shape; L is the maximum internal dimension of the annular support step 3, and L≥L2.

[0078] Accordingly, such as Figure 13As shown, in this embodiment, the annular support step 3 has multiple first through holes 33, and the overflow groove 111 has multiple second through holes 112. The second through holes 112 can be considered overflow holes. When glue overflows from the annular support step 3 of the base 1 and flows into the overflow groove 111, the glue can flow out through the circular overflow holes, thus preventing the glue level in the overflow groove from becoming too high and causing defects in the manufactured LED display module 2. The reason for having multiple first through holes 33 in the annular support step 3 is to facilitate the subsequent removal of the LED display module 2 from the base 1.

[0079] like Figure 10 and Figure 13 As shown, in practical applications, the disassembly plate 4 is equipped with multiple ejector pins 41, which correspond one-to-one with the first through holes 33. After the LED display module 2 has been potted and cured, when the operator wishes to disconnect the connection between the LED display module 2 and the base 1, the ejector pins 41 on the disassembly plate 4 pass through the first through holes 33 through the matching positioning of the disassembly plate 4 and the base 1, thereby ejecting the LED display module 2 from the inner cavity of the base 1. Of course, in this embodiment, to ensure effective alignment between the first through holes 33 and the ejector pins 41, first positioning posts 42 are also provided on the four peripheral corners of the disassembly plate 4, so that the first positioning posts 42 correspond to the first positioning holes 13 opened on the base 1 for positioning.

[0080] Furthermore, in this embodiment, to facilitate the positioning of the LED display module 2 within the annular support step 3, and to ensure that the lower surface (IC component side) of the PCBA board 21 of the LED display module 2 can ultimately contact the first step surface 31 of the annular support step 3, the inventors have also provided a second positioning post 5 in the annular support step 3 for matching and positioning with the positioning hole of the LED display module 2. Simultaneously, multiple third through holes 12 are also provided on the base 1. These third through holes 12 are all located on the top surface of the base 1, and the vertical height of the top surface of the base 1 is equal to the vertical height of the second step surface 32.

[0081] Accordingly, further reading Figure 3 As can be seen, in this embodiment, a limiting plate 6 is also designed. The length and width of the limiting plate 6 are smaller than the length and width of the LED display module 2. The limiting plate 6 is provided with limiting pieces 61 on all four sides. The limiting pieces 61 can be specifically selected as steel pieces. The limiting pieces 61 are provided with multiple fixing round holes so that the limiting pieces 61 can be fixed to the periphery of the limiting plate 6 by passing bolts through the fixing round holes.

[0082] Among them, the two adjacent limiting pieces 61 can be connected end to end to form an annular limiting structure. In actual application, the thickness of the limiting piece 61 needs to be less than the gap between adjacent LED beads of the LED display module 2, and the top of the limiting piece 61 needs to protrude from the upper surface of the limiting plate 6. Thus, during the potting process, when the limiting plate 6 is placed on the upper surface of the LED display module 2 (the upper surface of the LED beads 22), the end of the limiting piece 61 protruding from the limiting frame is placed between the gaps between adjacent LED beads of the LED display module 2. At this time, the limiting piece 61 can surround the annular support step 3 and the LED display module 2 to form an annular potting groove, thereby ensuring that the liquid potting glue will not overflow into the gap between the LED beads in the middle of the LED display module 2.

[0083] In this embodiment, to prevent the base 1 and the limiting piece 61 from sticking to the adhesive, in practical applications, the surfaces of the base 1 and the limiting piece 61 can be electroplated with polytetrafluoroethylene (PTFE) to improve the potting effect of the LED display module 2. The electroplating with PTFE is known to those skilled in the art and will not be elaborated upon here.

[0084] In practical applications, when it is required that the entire LED display module 2 be potted with a single type of adhesive, the operator does not need to use the limiting plate 6 designed in this utility model. The operator can directly control the LED display module 2 to be installed and fixed on the first step surface 31 of the annular support step 3, so that the first step surface 31 (LED display module support surface), the second step surface 32 (potting limiting step surface) and the four edges of the LED display module 2 form a potting groove. At this time, the operator can control the adhesive to be directly potted from the front of the LED display module 2 into the potting groove to complete the sealing of the entire LED display module 2.

[0085] Of course, when the user places the LED display module 2 on the first step surface 31 of the annular support step 3, the user can also place the limiting plate 6 on the upper surface of the LED display module 2, and place the limiting pieces 61 around the limiting plate 6 in the gap between the adjacent LED beads 22 of the LED display module 2; so as to pot the first glue X into another potting groove formed by the limiting pieces 61, the LED display module 2 and the annular support step 3, to ensure that the liquid potting glue will not overflow into the gap between the beads in the middle part of the LED display module 2; wherein, the first glue X fills the potting groove, the glue potting height is less than the highest surface of the LED bead 22, and wait for the glue to cure after potting is completed.

[0086] Accordingly, after the first adhesive has cured and solidified, the second adhesive is poured into the middle position of the LED display module 2, which is surrounded by the limiting piece 61 of the limiting plate 6, and the pouring height of the second adhesive Y is made to be consistent with the height of the first adhesive X. The first adhesive X and the second adhesive Y are combined together, that is, the LED display module 2 is surrounded by the potting adhesive X, and the gap of the lamp beads in the middle is the adhesive Y. After the potting is completed, wait for the adhesive Y to solidify.

[0087] Therefore, after the glue has cured, the LED display module can be removed from the base plate using the disassembly plate 4. The resulting LED display module 2 may have burrs around the glue and be too large. Excess glue can be removed by machining, and the size of the LED display module can be machined to the actual size range.

[0088] In summary, it can be seen that the potting fixture designed by this utility model can effectively cooperate with the traditional potting process to produce small-pitch display modules. There is no pitch limitation, and the final LED display module has better reliability and can effectively adapt to harsh outdoor environments. It has good prospects for promotion and application value.

[0089] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A glue-filling jig for an LED display module, characterized in that, The utility model relates to a LED display module dismounting device, including: The base one side is recessed with the cavity, be equipped with annular support step for supporting LED display module in the cavity, and still be equipped with overflow glue groove around annular support step in the cavity, annular support step includes first step surface and second step surface that set up horizontally in sequence from inside to outside, LED display module sets up on first step surface, the height of the upper surface of LED display module in vertical direction is greater than second step surface, the height of second step surface in vertical direction is greater than first step surface, and the maximum long and narrow size of horizontal projection of first step surface is greater than the long and narrow size of LED display module, Among them, still be equipped with a plurality of first through -hole in annular support step, be equipped with a plurality of thimble on dismounting board, with dismounting board and base corresponding matching positioning, to through a plurality of thimble passes through a plurality of first through -hole and ejects LED display module from annular support step. 2.The potting jig for LED display modules according to claim 1, wherein, First positioning column is equipped on the dismounting board, and first positioning hole is equipped on the base corresponding with first positioning column. 3.The potting jig for LED display modules according to claim 1, wherein, A plurality of thimble and dismounting board are detachably connected. 4.The potting jig for LED display modules according to claim 1, wherein, Still include limiting board, the long and narrow size of limiting board is less than the long and narrow size of LED display module, and the four around limiting board are equipped with limiting piece, and the thickness of limiting piece is less than the gap between adjacent lamp pearl of LED display module.

5. The potting jig for LED display modules according to claim 4, characterized in that, The limiting piece of the four around limiting board is connected between the two adjacent edges, and the top end of the limiting piece is protruding from the upper surface of the limiting board. 6.The potting jig for LED display modules according to claim 4, wherein, The surface of the limiting piece is covered with polytetrafluoroethylene.

7. The potting jig for LED display modules according to claim 1, wherein, The surface of the base is covered with polytetrafluoroethylene. 8.The potting jig for LED display modules according to claim 1, wherein, A plurality of second through -holes are formed in the overflow glue groove. 9.The potting jig for LED display modules according to claim 1, wherein, Second positioning column is equipped in annular support step for matching positioning with the positioning hole of LED display module. 10.The potting jig for LED display modules of claim 1, wherein, A plurality of third through -holes are formed in the base, and the third through -holes are formed on the top surface of the base. The height of the top surface of the base in the vertical direction is equal to the height of the second step surface in the vertical direction.

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