A method for manufacturing a soft module of an LED display screen and a soft module

Abstract

The present application belongs to the field of LED display technology, and relates to a method for manufacturing a soft module of an LED display screen and a soft module of an LED display screen, wherein the soft module of the LED display screen comprises a lamp board and a soft shell cover, the lamp board comprises a flexible circuit board and LED lamp beads, and the soft shell cover wraps the edge of the flexible circuit board; the edge of the front side of the soft shell cover is provided with a rim along its circumference, the top of the inner side wall of the rim cover is provided with a plurality of second protrusions, and the bottom is provided with a groove, the edge of the flexible circuit board is placed in the groove, the back of the second protrusion is closely attached to the front side of the flexible circuit board, and is located in the gap between every two LED lamp beads at the edges of the flexible circuit board; the beneficial effect is that the soft shell cover wraps the edges of the flexible circuit board to prevent rainwater from penetrating into the interior of the LED display screen from the positions of the edges of the soft module of the LED display screen, so that the waterproof effect of the soft module of the LED display screen is better, and the technical problem of poor waterproof performance of the existing soft module of the LED display screen is solved.

Description

Technical Field

[0001] The present application relates to the technical field of LED display screens, and particularly relates to a manufacturing method and a flexible module of an LED display screen flexible module. Background Art

[0002] Existing LED display screen flexible modules usually include a lamp board and a silicone bottom shell. The bottom shell is mounted on the back of the lamp board, and glue is poured on the front and back of the lamp board for waterproofing. However, after the LED display screen flexible modules are spliced into an LED display screen, in an outdoor environment, rainwater may seep into the interior of the LED display screen from the edge position of the LED display screen flexible module, and the waterproof effect of the LED display screen flexible module is not ideal. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] In view of the above-mentioned disadvantages and deficiencies of the prior art, the present application provides a manufacturing method and a flexible module of an LED display screen flexible module, which solve the technical problem of poor waterproof performance of the existing LED display screen flexible module.

[0005] (2) Technical Solutions

[0006] In order to achieve the above object, the main technical solutions adopted by the present application include:

[0007] In a first aspect, an embodiment of the present application provides an LED display screen flexible module, including a lamp board and a flexible shell cover. The lamp board includes a flexible circuit board and LED lamp beads mounted on the front of the flexible circuit board. The LED lamp beads are electrically connected to the flexible circuit board, and the flexible shell cover wraps the edge of the flexible circuit board; wherein, the edge of the front of the body of the flexible shell cover is provided with a hemming extending in the direction of the front of the lamp board along its circumference. Uniformly distributed second protrusions are arranged along the inner side wall of the hemming along its circumference. A groove is vertically arranged at the bottom inner side of the hemming perpendicular to the second protrusions. The edge of the flexible circuit board is placed in the groove. The bottom end face of the second protrusion is attached to the front of the flexible circuit board, and each second protrusion is stuck in the gap between every two adjacent LED lamp beads located at the edge of the flexible circuit board.

[0008] Optionally, the top end face of the second protrusion is located at a position from one-third to one-half of the height of the LED lamp bead. Waterproof glue is poured on the front of the lamp board, and the height of the waterproof glue is equal to the height of the second protrusion.

[0009] Optionally, the flexible shell cover is in a "mouth" shape, and bending grooves are provided on the back of the four side frames, and the bending grooves are perpendicular to the side frames.

[0010] Optionally, waterproof glue is poured on the back of the lamp board, and the height of the waterproof glue is lower than or flush with the bottom position of the bending groove.

[0011] Optionally, the soft shell is evenly provided with a plurality of bosses along its circumference, and a mounting seat for mounting the magnet is fixedly mounted on the bosses; a slot is circumferentially arranged in the middle of the mounting seat, the mounting seat is nested in the bosses, and the back side of the mounting seat is exposed on the back side of the soft shell.

[0012] In a second aspect, an embodiment of the present application provides a method for manufacturing an LED display screen soft module, which is used to manufacture the aforementioned LED display screen soft module, comprising the following steps:

[0013] A flexible circuit board is selected as the substrate of the light board, electronic components are mounted on the back, and LED lamp beads are mounted on the front to make a unit board;

[0014] The unit board is placed in the cavity of the mold, and liquid silicone is injected into the cavity to solidify to form a soft shell that wraps the edge of the unit board;

[0015] After the soft shell is cured, it is taken out together with the unit board to obtain a finished LED display soft module.

[0016] Optionally, after a flexible circuit board is selected as the substrate of the light board, electronic devices are mounted on the back and LED lamp beads are mounted on the front to make a unit board, the method also includes the following steps: performing a first functional test and aging test on the unit board to obtain a unit board that has passed the test.

[0017] Optionally, when placing the unit plate into the cavity of the mold, the method further comprises the following step: fixing a mounting seat for mounting the magnet on a positioning column of the cavity corresponding to the back side of the unit plate.

[0018] Optionally, after placing the unit board into the cavity of the mold and injecting the liquid silicone into the cavity, the method further comprises the following steps: heating the mold, the temperature of the mold is 120° C., and the curing time of the liquid silicone is 80 seconds.

[0019] Optionally, after the soft shell is cured, it is taken out together with the unit board to obtain a finished LED display soft module, and the method further comprises the following steps: filling the finished LED display soft module with glue, and performing a second functional test and an aging test;

[0020] For the finished product LED display soft module that has passed the test, waterproof glue is poured on the front of the unit board until it is flush with the front end of the soft shell;

[0021] After the waterproof glue on the front of the unit board is solidified, the waterproof glue is poured on the back of the unit board;

[0022] After the waterproof glue on the back of the unit board is cured, the finished LED display soft module is subjected to a second functional test and an aging test, and the LED display soft module that passes the test is obtained as the final product.

[0023] (III) Beneficial effects

[0024] The beneficial effects of this application are:

[0025] 1. A method for manufacturing a soft module of an LED display screen and a soft module of the present application. Since the soft shell cover is injection molded by an injection molding process and a edging is formed to wrap the edge of the flexible circuit board, a plurality of second protrusions are arranged on the top of the inner side wall of the edging, and a groove is arranged on the bottom perpendicular to the second protrusions. The edge of the flexible circuit board is placed in the groove, and the back of the second protrusion is close to the front of the flexible circuit board and is located in the gap between every two LED lamp beads on the edges of the flexible circuit board, thereby preventing rainwater from penetrating into the interior of the LED display screen from the edges of the soft module of the LED display screen. The side wall surface of the soft module of the LED display screen is soft silicone, and two adjacent soft modules of the LED display screen can fit together more closely when the LED display screen is spliced. Compared with the prior art, it can improve the waterproof performance of the soft module of the LED display screen, make the waterproof effect of the LED display screen better, and solve the technical problem of poor waterproof performance of the existing soft module of the LED display screen.

[0026] 2. The soft shell is directly injection molded through the injection molding process and the light board is wrapped in the soft shell. At the same time, the mounting base is nested in the soft bottom shell. There is no need to manually attach the soft shell to the back of the light board, which shortens the production process, reduces manual operations, and has higher production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A method for manufacturing a soft module for an LED display screen and a flow chart of a method for manufacturing a soft module for an LED display screen according to Embodiment 1 of the soft module of the present application;

[0028] Figure 2 This is one of the three-dimensional schematic diagrams of a LED display screen soft module manufacturing method and soft module embodiment 2 of the present application;

[0029] Figure 3 This is a second three-dimensional schematic diagram of an LED display screen soft module manufacturing method and soft module embodiment 2 of the present application;

[0030] Figure 4 A method for manufacturing a soft module of an LED display screen and a schematic diagram of an LED display screen soft module decomposition of soft module embodiment 2 of the present application;

[0031] Figure 5 A method for manufacturing a soft module of an LED display screen and a three-dimensional schematic diagram of a soft shell of a soft module embodiment 2 of the present application;

[0032] Figure 6A cross-sectional schematic diagram of a soft module for an LED display screen and a soft module embodiment 2 of the present application;

[0033] Figure 7 for Figure 2 An enlarged schematic diagram of A in FIG.

[0034] Figure 8 for Figure 6 An enlarged schematic diagram of point B in FIG.

[0035] [Description of Reference Numerals]

[0036] 1. Light board; 10. Signal input and output connector; 11. Positioning column; 12. Power connector; 13. Column driver chip; 14. Tantalum capacitor; 15. Row driver chip; 16. LED lamp beads;

[0037] 2. soft shell; 21. bending groove; 22. boss; 23. edge wrapping; 231. groove; 232. second protrusion;

[0038] 3. Mounting seat; 31. Card slot;

[0039] 4. Magnet. DETAILED DESCRIPTION

[0040] In order to better explain the present application and facilitate understanding, the present application is described in detail below in conjunction with the accompanying drawings through specific implementation methods. Figure 2 The orientation is taken as a reference, with the direction of the light board 1 being the "front" and the direction of the soft shell 2 being the "back".

[0041] The embodiment of the present application provides a method for manufacturing a soft module of an LED display screen and a soft module of an LED display screen, wherein the soft module of the LED display screen includes a lamp board and a soft shell cover, the lamp board includes a flexible circuit board and LED lamp beads mounted on the front of the flexible circuit board, the LED lamp beads are electrically connected to the flexible circuit board, and the soft shell cover wraps the edge of the flexible circuit board; wherein the edge of the front side of the body of the soft shell cover is provided with a rim extending toward the front side of the lamp board along its circumference, the inner side wall of the rim is provided with uniformly distributed second protrusions along its circumference, the inner side of the bottom of the rim is provided with a groove perpendicular to the second protrusion, and the edge of the flexible circuit board is provided with a rim extending toward the front side of the lamp board along its circumference, and the inner side wall of the rim is provided with a groove perpendicular to the second protrusion, and the edge of the flexible circuit board is provided with a rim extending toward the front side of the lamp board along its circumference. In the groove, the bottom end surface of the second protrusion is fitted with the front surface of the flexible circuit board, and each second protrusion is stuck in the gap between every two adjacent LED lamp beads located at the edge of the flexible circuit board, thereby preventing rainwater from penetrating into the interior of the LED display screen from the edges of the LED display screen soft module on all sides, and allowing two adjacent LED display screen soft modules to fit together more closely when splicing the LED display screen, thereby greatly improving the waterproof performance of the LED display screen soft module, making the LED display screen more waterproof, and solving the technical problem of poor waterproof performance of the existing LED display screen soft module.

[0042] In order to better understand the above technical solution, exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0043] Embodiment 1:

[0044] Reference Figure 1 This embodiment 1 provides a method for manufacturing a soft module of an LED display screen, comprising the following steps:

[0045] S1: A flexible circuit board is selected as the substrate of the light board 1, and is made into a unit board through SMT patch processing. The back of the flexible circuit board is mounted with driving chips, connectors and other electronic devices, and a fixing column 11 is welded on the back, and LED lamp beads 16 are mounted on the front.

[0046] S2: Place the unit board into the cavity of the mold, position the unit board on the side wall of the cavity through the positioning column 11 on the back of the unit board, inject liquid silicone into the cavity of the mold through an injection molding machine, and the liquid silicone solidifies to form a soft shell that wraps the edge of the unit board.

[0047] S3: After the soft shell 2 is cured, it is taken out together with the unit board and cooled under ventilation or cold air conditions to obtain a finished LED display soft module.

[0048] In step S1, after the unit board is manufactured, the following steps are also included: performing the first functional test and aging test on the unit board. The aging test time is 65 to 80 hours, and obtaining the unit board that passes the test; repairing the unit board that fails the aging test, and continuing to perform the functional test and aging test on the repaired unit board.

[0049] In step S2, before injecting the liquid silicone into the chamber, the method further includes the following steps: vacuuming the chamber. After the chamber of the mold is completely closed, a vacuum machine is used to vacuum the chamber to form a negative pressure in the chamber to avoid bubbles in the liquid silicone in the chamber, which affects the injection molding effect. The mold includes two mutually cooperating first molds and a second mold, and the two cooperate to form a closed cavity. The mold is CNC-processed with 8407 mold steel with an accuracy of less than 5 threads. The mold is processed by high-precision CNC to ensure precise installation between the mold and the unit plate to meet the precision requirements of the injection molded product.

[0050] In step S2, when the unit plate is placed in the cavity of the mold, the method further includes the following step: fixing the mounting seat 3 of the magnet 4 on the positioning column of the cavity corresponding to the back side of the unit plate.

[0051] In step S2, after the liquid silicone is injected into the chamber, the method further comprises the following steps: heating the mold to allow the liquid silicone to quickly solidify to form a soft shell 2 that wraps the edge of the unit board, and the mounting seat 3 is nested in the soft shell 2. The temperature of the mold is 120°C, and the curing time of the liquid silicone is 80S. The higher the temperature, the shorter the curing time. In actual operation, the temperature of the mold can be changed according to actual conditions, and the temperature of the mold can be set between 110°C and 200°C.

[0052] In S3, after obtaining the finished LED display soft module, the method further includes the following steps:

[0053] First, glue is poured on the front of the finished LED display soft module by a machine, and waterproof glue is poured on the front of the unit board until it is flush with the front end surface of the soft shell 2. The waterproof glue can be a silicone rubber adhesive, a single-component or two-component adhesive composed of adhesive, cross-linking agent, catalyst, reinforcing agent, tackifier and thermal stabilizer. The glue pouring process is completed by a machine, such as a glue pouring machine.

[0054] Next, waterproof glue is poured on the back of the unit board, so that the height of the waterproof glue is lower than or flush with the bottom of the bending groove 21 of the soft shell 2. The thickness of the waterproof glue should not be too small and must meet the waterproof requirements of the back of the unit board. In some optional solutions, according to the actual waterproof requirements, the back of the unit board can be sprayed with three-proof paint instead.

[0055] Finally, after the waterproof glue of the unit board is cured, the finished LED display soft module is subjected to a second functional test and aging test, and the LED display soft module that passes the test is obtained as the final product. The defective products that fail the test are repaired and then subjected to functional test and aging test.

[0056] The present embodiment 1 provides a method for manufacturing a soft module of an LED display screen, wherein a unit board is fixed in a cavity of a mold, a mounting seat 3 is fixed in the cavity and placed on the back of the unit board, and a soft shell cover 2 having an edge 23 that can wrap the edge of a flexible circuit board is formed through an injection molding process. The soft shell cover 2 is directly assembled and fixed to the flexible circuit board, and the mounting seat 3 is nested in the soft shell cover 2, all in one step, and there is no need to manually fix them together, thereby simplifying the production process, saving manpower, and achieving higher production efficiency. The mounting seat 3 and the soft shell cover 2 are assembled more tightly and have stronger waterproof properties. The produced soft shell cover 2 wraps the edge of the flexible circuit board. On the one hand, it protects the flexible circuit board and prevents the flexible circuit board from being bumped. On the other hand, the four side walls of the LED display soft module are all silicone. When splicing the LED display, the adjacent LED display soft modules can fit together tightly to prevent rainwater from penetrating into the interior of the LED display from the splicing seams. The LED display soft module has better waterproof ability. Furthermore, on the basis of the soft shell cover 2 wrapping the edge of the flexible circuit board, waterproof glue is poured on the front and back of the unit board, so that the front and back of the unit board and the contact point with the soft shell cover 2 are all waterproof, further improving the waterproof performance of the LED display soft module, preventing rainwater from penetrating into the interior of the LED display from the surrounding edges of the adjacent LED display soft modules. In other words, rainwater cannot enter the LED display from the fitting points of the adjacent LED display soft modules and the contact points between the light board 1 and the soft shell cover 2. The waterproof effect is better, which solves the technical problem of poor waterproof performance of the existing LED display soft module.

[0057] Embodiment 2:

[0058] See also Figure 2 and Figure 4 Based on the first embodiment, the second embodiment provides a soft module for an LED display screen. The soft module for an LED display screen includes a lamp board 1 and a soft shell 2. The lamp board 1 includes a flexible circuit board and an LED lamp bead 16 mounted on the front of the flexible circuit board. The LED lamp bead 16 is electrically connected to the flexible circuit board. The flexible circuit board can be a flexible PCB circuit board. The soft shell 2 is injection molded by an injection molding process and wraps around the edge of the PCB circuit board.

[0059] See also Figure 5The front edge of the body of the soft shell 2 is provided with a rim 23 extending toward the front direction of the light board 1 along its circumference, and the inner side wall of the rim 23 is provided with evenly distributed second protrusions 232 along its circumference. Figure 7 and Figure 8 , a groove 231 is provided on the inner side of the bottom of the hem 23 perpendicular to the second protrusion 232, the edge of the flexible circuit board is placed in the groove 231, the bottom end face of the second protrusion 232 is in contact with the front face of the flexible circuit board, and each second protrusion 232 is stuck in the gap between every two adjacent LED lamp beads 16 at the edge of the flexible circuit board. The top end face of the second protrusion 232 is located at a position of one-third to one-half of the height of the LED lamp bead 16, and the front of the lamp board 1 is filled with waterproof glue, and the height of the waterproof glue is equal to the height of the second protrusion 232. The back of the lamp board 1 is filled with waterproof glue until it is flush with the bottom of the bending groove 21. In actual operation, the amount of waterproof glue on the back of the lamp board 1 can be reduced, but it should not be too little, and it is necessary to ensure that the back of the lamp board 1 has good waterproof performance.

[0060] The waterproof glue applied on the front and back of the light board 1 is made of flexible materials, such as two-component liquid silicone, one-component silicone, etc., to ensure that the LED display soft module has sufficient flexibility, can be bent significantly, and the waterproof glue is not easy to crack.

[0061] The soft shell cover 2 wraps the edge of the light board 1 by setting the edging 23. On the one hand, it is convenient to perform the glue filling operation on the front and back of the light board 1. On the other hand, the soft shell cover 2 can protect the light board 1 to prevent the light board 1 from being bumped. Compared with the existing method of directly mounting the bottom shell on the back of the light board 1, the present embodiment directly adopts the wrapping method to wrap the edges of the light board 1 with the soft shell cover 2. Rainwater will not penetrate into the interior of the LED display screen from the side wall of the LED display screen soft module, and the waterproof performance is stronger. Moreover, when spliced ​​into a display screen, the side walls of the two adjacent LED display screen soft modules are tightly fitted together to achieve a waterproof effect.

[0062] See also Figure 6 and Figure 8 In order to improve the bendability of the LED display soft module, the soft shell 2 is in the shape of a "mouth" as a whole, and the backs of the four frames are provided with bending grooves 21, which are perpendicular to the frames. The shape of the bending groove 21 is an isosceles trapezoid, and the upper and lower bases of the isosceles trapezoid correspond to the bottom and opening of the bending groove 21 respectively, and the length of the upper base of the isosceles trapezoid is less than the length of its lower base.

[0063] See also Figure 4 , Figure 5 and Figure 8The soft shell 2 is evenly provided with a plurality of bosses 22 for installing the mounting seat 3 along its circumference. The mounting seat 3 is made of alloy, which can be a copper column, and a circular slot 31 is provided in the middle thereof. The mounting seat 3 is nested in the boss 22 of the soft shell 2, and the back of the mounting seat 3 is exposed to the back of the boss 22 of the soft shell 2, and the magnet 4 is fixedly installed in the mounting seat 3. This arrangement enables the mounting seat 3 to be firmly and securely fixed in the soft shell 2, and the soft shell 2 is closely matched to prevent rainwater from penetrating into the interior of the LED soft module from between the two, and the waterproof performance is stronger.

[0064] like Figure 3 and Figure 4 As shown, the back of the lamp board 1 is mounted with components such as a signal input and output connector 10, a power connector 12, a column driver chip 13, a tantalum capacitor 14, and a row driver chip 15. There are two signal input and output connectors 10, which are respectively arranged at the two ends of the lamp board 1, the power connector 12 is arranged between the two signal input and output connectors 10, a plurality of column driver chips 13 are evenly arranged, a plurality of tantalum capacitors 14 are arranged, and a plurality of row driver chips 15 are arranged in the middle of the back of the lamp board 1. Two positioning posts 11 are welded in parallel in the middle of the back of the lamp board 1, and the positioning post 11 is located between two adjacent row driver chips 15.

[0065] In the LED display soft module of the present embodiment 2, the front of the soft shell 2 is provided with an edge 23, the bottom of the inner side of the edge 23 is provided with a groove 231, and the inner side of the top of the edge 23 is provided with a plurality of second protrusions 232, the edges of the flexible circuit board are placed in the grooves 231, the second protrusions 232 are placed on the front of the lamp board 1, and are located in the gap between the adjacent LED lamp beads 16 at the edge of the lamp board 1, the soft shell 2 wraps the edge of the lamp board 1, and the two are fixed together, the mounting seat 3 is nested in the boss 22 of the soft shell 2, and the front and back of the lamp board 1 are poured with waterproof glue, so that the lamp board 1 has a comprehensive waterproof effect, which greatly improves the waterproof performance of the LED display soft module; in addition, because the soft shell 2 wraps the edge of the lamp board 1 Wrap it up, that is, the side walls of the LED display soft module are all made of silicone. When splicing the LED display, adjacent LED display soft modules can fit together tightly to prevent rainwater from penetrating into the interior of the LED display from the splicing seams. The LED display soft module has better waterproof ability. Therefore, the LED display soft module of this embodiment 2 can prevent rainwater from penetrating into the interior of the LED display from the edges of the LED display soft module. In other words, rainwater cannot enter the LED display from the fitting of adjacent LED display soft modules and the contact position between the light board 1 and the soft shell 2. The LED display soft module has better waterproof effect, which solves the technical problem of poor waterproof performance of the existing LED display soft module.

[0066] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0067] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] In the present application, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0069] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0070] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A LED display screen soft module, characterized in that: It includes a lamp board (1) and a soft shell sleeve (2) formed by an injection molding process. The lamp board (1) includes a flexible circuit board and LED lamp beads (16) mounted on the front side of the flexible circuit board. The LED lamp beads (16) are electrically connected to the flexible circuit board. The soft shell sleeve (2) wraps the edge of the flexible circuit board, and the front side of the lamp board (1) is filled with waterproof glue, and the back side of the lamp board (1) is filled with waterproof glue or sprayed with三防漆 (三防漆可保留拼音 Sanfang Paint as it might be a specific product name without a common English equivalent); Among them, along the circumferential direction of the front edge of the body of the soft shell sleeve (2), there is a hemming (23) extending towards the front side of the lamp board (1). Along the circumferential direction of the inner side wall of the hemming (23), there are evenly distributed second protrusions (232). Vertically to the second protrusions (232) at the bottom inner side of the hemming (23), there is a groove (231). The edge of the flexible circuit board is placed in the groove (231), the bottom end face of the second protrusions (232) fits against the front side of the flexible circuit board, and each of the second protrusions (232) is stuck at the gap between every two adjacent LED lamp beads (16) located at the edge of the flexible circuit board; Among them, the injection molding process refers to: putting the lamp board (1) into the cavity of the mold, and injecting liquid silicone into the cavity to cure and form a soft shell sleeve (2) that wraps the edge of the flexible circuit board.

2. The LED display soft module according to claim 1, characterized in that: The top end face of the second protrusions (232) is located at a position from one-third to one-half of the height of the LED lamp beads (16), and the height of the waterproof glue on the front side of the lamp board (1) is equal to the height of the second protrusions (232).

3. The LED display screen soft module according to claim 1, characterized in that: The soft shell sleeve (2) is in a "mouth" shape, and there are bending grooves (21) on the back sides of the four side frames, and the bending grooves (21) are perpendicular to the side frames.

4. The LED display screen soft module according to claim 3, characterized in that: The height of the waterproof glue on the back side of the lamp board (1) is lower than or flush with the bottom position of the bending grooves (21).

5. The LED display screen soft module according to claim 1, characterized in that: The soft shell sleeve (2) is evenly provided with a plurality of bosses (22) along its circumferential direction, and a mounting seat (3) for mounting a magnet (4) is fixedly installed on the bosses (22); A clamping groove (31) is circumferentially arranged in the middle of the mounting seat (3). The mounting seat (3) is nested in the bosses (22), and the back side of the mounting seat (3) is exposed outside the back side of the soft shell sleeve (2).

6. A method for manufacturing a LED display screen soft module, used for manufacturing the LED display screen soft module according to any one of claims 1 to 5, characterized in that: It includes the following steps: Select a flexible circuit board as the substrate of the lamp board (1), mount electronic devices on its back side, and mount LED lamp beads (16) on its front side to make a unit board; Put the unit board into the cavity of the mold, and inject liquid silicone into the cavity to cure and form a soft shell sleeve (2) that wraps the edge of the unit board; After the soft shell sleeve (2) is cured, take it out together with the unit board to obtain a finished LED display soft module.

7. The method for manufacturing a LED display soft module according to claim 6, characterized in that: After selecting a flexible circuit board as the substrate of the lamp board (1), mounting electronic devices on its back side, and mounting LED lamp beads (16) on its front side to make a unit board, the method further includes the following steps: conduct the first function test and aging test on the unit board to obtain the unit board that passes the test.

8. The method for manufacturing a LED display screen soft module according to claim 7, characterized in that: When the unit plate is placed in the cavity of the mold, the method further comprises the following steps: fixing a mounting seat (3) for mounting a magnet (4) on a positioning column of the cavity corresponding to the back side of the unit plate.

9. The method for manufacturing a LED display soft module according to claim 8, characterized in that: After placing the unit board into the cavity of the mold and injecting liquid silicone into the cavity, the method further includes the following steps: heating the mold, the temperature of the mold is 120° C., and the curing time of the liquid silicone is 80 seconds.

10. The method for manufacturing a LED display screen soft module according to claim 9, characterized in that: After the soft shell (2) is cured, it is taken out together with the unit board to obtain a finished LED display soft module, and the method further comprises the following steps: gluing the finished LED display soft module, and performing a second functional test and an aging test; Filling the front surface of the unit board of the finished LED display soft mold that has passed the test with waterproof glue until it is flush with the front end surface of the soft shell (2); After the waterproof glue on the front side of the unit board is solidified, the waterproof glue is poured on the back side of the unit board; After the waterproof glue on the back of the unit board is cured, the finished LED display soft module is subjected to a second functional test and an aging test, and the LED display soft module that passes the test is obtained as the final product.

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