LED display screen

Abstract

The present application provides an LED display screen, which includes: a circuit board, a plurality of first copper pillars and a shell; the circuit board is provided with a plurality of first through holes, the first ends of the plurality of first copper pillars are respectively embedded in the plurality of first through holes on the circuit board, and the second ends of the plurality of first copper pillars are accommodated in the through holes on the shell side; wherein the first ends of the plurality of first copper pillars are interference-connected with the plurality of first through holes on the circuit board; the surface of the side of the circuit board away from the shell is parallel to the surface of the side of the shell away from the circuit board. The LED display screen of the present application can offset the flatness error of the shell and the circuit board through the different interference amounts between the first ends of the first copper pillars and the circuit board, and can eliminate the surface flatness error of the LED display screen caused by the flatness error of the circuit board and the shell.

Description

Technical Field

[0001] The present application relates to the technical field of display screens, and in particular to an LED display screen. Background Art

[0002] With the development of LED display technology and the increase in demand for display application market, high-density, high-definition LED display screens have become the new favorite of the market.

[0003] Existing LED display screens mainly process display devices into display modules, install them on boxes of different specifications, and then assemble the LED display boxes according to the needs of display applications. Pressing the circuit board and the shell has always been a common method for LED display screens, but because the thickness of the circuit board is uneven, that is, the flatness is not fixed, and the flatness of the shell will also be a problem, so the flatness of each shell will be a problem, resulting in an uneven lamp surface, affecting use.

[0004] In view of this, overcoming the deficiencies of the prior art is an urgent problem to be solved in the field of this technology. Summary of the invention

[0005] The main technical problem solved by the present application is to provide an LED display screen, which can offset the flatness error of the shell and the circuit board through different interference fits between the first end of the first copper column and the circuit board, thereby eliminating the surface flatness error of the LED display screen caused by the flatness error of the circuit board and the shell.

[0006] In order to solve the above technical problems, a technical solution adopted in the present application is: an LED display screen, the LED display screen comprising: a circuit board, a plurality of first copper pillars and a housing;

[0007] The circuit board is provided with a plurality of first through holes, the first ends of the plurality of first copper pillars are respectively embedded in the plurality of first through holes on the circuit board, and the second ends of the plurality of first copper pillars are accommodated in the through holes on the housing side;

[0008] The first ends of the plurality of first copper pillars are interference-connected with the plurality of first through holes on the circuit board; and a side surface of the circuit board away from the shell is parallel to a side surface of the shell away from the circuit board.

[0009] Preferably, the LED display screen further includes a second copper column;

[0010] The circuit board is provided with a plurality of second through holes, and the housing is provided with a plurality of third through holes corresponding to the second through holes;

[0011] The plurality of second copper pillars respectively penetrate the plurality of third through holes, and the first ends of the plurality of second copper pillars are respectively embedded in the plurality of second through holes on the circuit board.

[0012] Preferably, a mounting portion is provided at the second end of the second copper column, wherein a side surface of the circuit board away from the mounting portion is parallel to a side surface of the mounting portion away from the circuit board;

[0013] The mounting portion is used to accommodate magnets so as to fix the LED display screen on the box body by magnet adsorption.

[0014] Preferably, the plurality of first through holes are arranged in a matrix on the circuit board, the number of the second through holes and the third through holes is 4, the second through holes are located at the four corners of the circuit board, and the third through holes are located at the four corners of the shell.

[0015] Preferably, the first end of the second copper column includes a second copper column end, the second copper column end is a truncated cone, and the diameter of the truncated cone gradually decreases in a direction away from the second end of the second copper column;

[0016] Wherein, the ends of the frustum with smaller diameters are respectively embedded in the plurality of second through holes on the circuit board.

[0017] Preferably, the first end of the second copper column includes a second copper column end and a second copper column body, the second copper column end includes a first opening and closing portion and a second opening and closing portion, and the first opening and closing portion and the second opening and closing portion are arranged on the second copper column body;

[0018] There is a gap between the first opening and closing portion and the second opening and closing portion, and under the action of external force, the gap between the first opening and closing portion and the second opening and closing portion can be gradually reduced.

[0019] Preferably, the LED display screen further comprises a screw, a threaded hole is provided at the second end of the first copper column, and a plurality of fourth through holes are provided on the housing;

[0020] The second end of the first copper column is accommodated in the fourth through hole, and the housing is threadedly connected to the first copper column by a screw.

[0021] Preferably, the first end of the first copper column includes a first copper column end, the first copper column end is a truncated cone, and the diameter of the truncated cone gradually decreases in a direction away from the second end of the first copper column;

[0022] Wherein, the ends of the truncated cone with smaller diameters are respectively embedded in the multiple first through holes on the circuit board.

[0023] Preferably, the first end of the copper column further includes an LED lamp, and the LED lamp is fixed to the end of the truncated cone with a smaller diameter.

[0024] Preferably, the first through hole includes a fifth through hole and a sixth through hole that are interconnected;

[0025] The LED lamp is accommodated in the sixth through hole, and the truncated cone is interference-connected with the fifth through hole, so that the first copper column is fixedly connected to the circuit board.

[0026] The beneficial effect of the present application is as follows: Different from the prior art, the present application provides an LED display screen, which, when there is a flatness error between a shell and a circuit board, offsets the flatness error between the shell and the circuit board by different interference fits between the first end of the first copper column and the circuit board, thereby achieving an effect in which a surface of the circuit board away from the shell is parallel to a surface of the shell away from the circuit board, thereby avoiding a surface flatness error of the LED display screen caused by a flatness error between the circuit board and the shell of the LED display screen, thereby ensuring the flatness of the LED display screen and improving the display performance of the LED display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a cross-sectional schematic diagram of the first embodiment of the LED display screen of the present application;

[0029] Figure 2 yes Figure 1 Schematic diagram of the side explosion of the LED display;

[0030] Figure 3 yes Figure 1 The overall exploded diagram of the LED display screen;

[0031] Figure 4 yes Figure 1 A schematic structural diagram of a circuit board implementation method in FIG.

[0032] Figure 5 It is a cross-sectional schematic diagram of the second embodiment of the LED display screen of the present application;

[0033] Figure 6 It is a cross-sectional schematic diagram of the third embodiment of the LED display screen of the present application;

[0034] Figure 7 yes Figure 6 Schematic diagram of the side explosion of the LED display;

[0035] Figure 8 yes Figure 6The overall exploded diagram of the LED display screen;

[0036] Fig. 9 yes Figure 6 A schematic structural diagram of a circuit board implementation method in FIG.

[0037] Fig.10 yes Figure 6 A schematic structural diagram of a housing embodiment in FIG.

[0038] Fig.11 is a cross-sectional schematic diagram of a fourth embodiment of the LED display screen of the present application;

[0039] Fig.12 is a schematic diagram of the three-dimensional structure of a first copper pillar implementation method of the present application;

[0040] Fig.13 yes Fig.12 A schematic diagram of the side structure of the first copper column in FIG.

[0041] Fig.14 is a schematic diagram of the three-dimensional structure of a second copper pillar implementation method of the present application;

[0042] Fig.15 yes Fig.14 A schematic diagram of the side structure of the second copper pillar in FIG.

[0043] Fig.16 is a schematic diagram of the three-dimensional structure of another embodiment of the second copper pillar of the present application;

[0044] Fig.17 yes Fig.16 A schematic diagram of the side structure of the second copper pillar in FIG.

[0045] Fig.18 It is a schematic diagram of the structure of the connection between the first copper column and the circuit board of the present application;

[0046] Fig.19 This is a schematic diagram of the structure of the LED display screen when the circuit board and the housing are pressed together by a jig in the present application;

[0047] Fig. 20 This is a first structural schematic diagram of the connection between the first copper column and the circuit board after the circuit board and the housing are pressed together by a jig in the present application;

[0048] Fig.21 This is a second structural schematic diagram of the connection between the first copper column and the circuit board after the circuit board and the housing are pressed together by a fixture in the present application. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] The present embodiment provides an LED display screen, which offsets the flatness errors of a shell and a circuit board through different interference fits between the first end of a first copper column and the circuit board, so as to achieve an effect that a surface of a side of the circuit board away from the shell is parallel to a surface of a side of the shell away from the circuit board, thereby avoiding the surface flatness error of the LED display screen caused by the flatness error of the circuit board and the shell of the LED display screen, ensuring the flatness of the LED display screen and improving the display performance of the LED display screen.

[0051] See below Figure 1 to Figure 4 , specifically describing one of the possible implementation methods of the LED display screen of this embodiment.

[0052] In this embodiment, the LED display screen 10 includes a circuit board 11, a plurality of first copper pillars 12, and a housing 13, which are arranged in sequence. The first ends of the plurality of first copper pillars 12 are respectively fixedly connected to the circuit board 11, and the second ends of the plurality of first copper pillars 12 are respectively fixedly connected to the housing 13, so as to fix the housing 13 and the circuit board 11.

[0053] The circuit board 11 may be in a square, rectangular or circular shape. The circuit board 11 is made of acrylic. The circuit board 11 includes a plurality of first through holes 111, which are distributed in an array on the circuit board 11. The housing 13 may be in a square, rectangular or circular shape, and the size of the housing 13 is the same as that of the circuit board 11.

[0054] In actual production, the first ends of multiple first copper pillars 12 are respectively embedded in multiple first through holes 111 on the circuit board 11 in a direction perpendicular to the surface of the circuit board 11 to ensure that the first copper pillars 12 are perpendicular to the surface of the circuit board 11, which is convenient for subsequent pressing by a jig.

[0055] In the actual manufacturing process, after the first ends of the multiple first copper pillars 12 are respectively embedded in the multiple first through holes 111 on the circuit board 11 in a direction perpendicular to the surface of the circuit board 11, a jig is used to press together the side of the circuit board 11 away from the shell 13 and the side of the shell 13 away from the circuit board 11, so that the side surface of the circuit board 11 away from the shell 13 is parallel to the side surface of the shell 13 away from the circuit board 11, wherein the first ends of the multiple first copper pillars 12 are interference connected with the multiple first through holes 111 on the circuit board 11.

[0056] In actual application scenarios, combined with Figure 5 and Figure 8 In order to ensure that the housing 13 and the circuit board 11 can be fixedly connected, in a preferred embodiment, a threaded hole 121 is provided at the second end of the first copper column 12, and the housing 13 and the circuit board 11 are fixedly connected by threaded connection. Among them, the housing 13 is provided with a plurality of fourth through holes 131, and the plurality of fourth through holes 131 are respectively arranged corresponding to the plurality of first copper columns 12, and the second end of the first copper column 12 is accommodated in the fourth through hole 131, and the housing 13 and the plurality of first copper columns 12 are threadedly connected by screws 15.

[0057] Specifically, multiple screws 15 are passed through the fourth through holes 131 and threadedly connected to the threaded holes 121 on the multiple first copper pillars 12. In other embodiments, the housing 13 and the first copper pillars 12 may be fixedly connected by welding, clamping or riveting.

[0058] The present application also provides another LED display screen, which can be connected to the corresponding box through magnet adsorption, is easy to disassemble and install, and is extremely suitable for application scenarios where disassembly and installation are frequent.

[0059] Combine the following Figure 6 to Figure 10 , describing one of the possible implementation methods of the LED display screen of this embodiment.

[0060] In this embodiment, the LED display screen 10 includes a circuit board 11, a plurality of first copper pillars 12, a housing 13, and a plurality of second copper pillars 14, which are arranged in sequence. The first ends of the plurality of first copper pillars 12 are respectively fixedly connected to the circuit board 11, and the second ends of the plurality of first copper pillars 12 are respectively fixedly connected to the housing 13, so as to fix the housing 13 and the circuit board 11. The first ends of the plurality of second copper pillars 14 are respectively fixedly connected to the circuit board 11, and the second ends of the plurality of second copper pillars 14 are used to install the LED display screen 10 on other devices.

[0061] The circuit board 11 further includes a plurality of second through holes 112, the number of the second through holes 112 is 4, and the plurality of second through holes 112 are located at the four corners of the circuit board 11. In other embodiments, the number and position of the second through holes 112 are set according to specific circumstances, and the shape, size and material of the circuit board 11 are selected according to actual circumstances, and this application does not limit this.

[0062] The housing 13 includes a plurality of third through holes 132, and the plurality of third through holes 132 on the housing 13 are arranged correspondingly to the plurality of second through holes 112 on the circuit board 11. In a specific application scenario, the housing 13 can be selected according to the shape and size according to the actual situation, and this application does not limit this.

[0063] In this embodiment, multiple second copper pillars 14 pass through the third through holes 132, and the first ends of the multiple second copper pillars 14 are respectively embedded in the multiple second through holes 112 on the circuit board 11, wherein the second ends of the second copper pillars 14 are provided with a mounting portion 141, and the mounting portion 141 is a magnet groove, and the mounting portion 141 is used to accommodate a magnet, so that the LED display screen can be set on the corresponding box by magnet adsorption, so as to realize simple installation and disassembly.

[0064] In actual application scenarios, combined with Fig.11 In order to ensure that the housing 13 and the circuit board 11 can be fixedly connected, in a preferred embodiment, a threaded hole 121 is provided at the second end of the first copper column 12, and the housing 13 and the circuit board 11 are fixedly connected by threaded connection. Among them, the housing 13 is provided with a plurality of fourth through holes 131, and the plurality of fourth through holes 131 are respectively arranged corresponding to the plurality of first copper columns 12, and the second end of the first copper column 12 is accommodated in the fourth through hole 131, and the housing 13 and the plurality of first copper columns 12 are threadedly connected by screws 15.

[0065] Specifically, multiple screws 15 are passed through the fourth through holes 131 and threadedly connected to the threaded holes 121 on the multiple first copper pillars 12. In other embodiments, the housing 13 and the first copper pillars 12 may be fixedly connected by welding, clamping or riveting.

[0066] The previous article specifically explained that there are many different structures of LED display screens, which can be flexibly selected and configured based on specific application scenarios. Fig.12 and Fig.13 , specifically describing one possible implementation method of the first copper pillar 12 in the aforementioned embodiment.

[0067] In this embodiment, the first end of the first copper column 12 includes a first copper column body 124 and a first copper column end 122. The first copper column end 122 is a truncated cone, and the diameter of the truncated cone gradually decreases in the direction away from the second end of the first copper column 12, and the first copper column body 124 is connected to the end of the truncated cone with a larger diameter. The first end of the first copper column 12 also includes an LED lamp 123, and the LED lamp 123 is fixed to the end of the truncated cone with a smaller diameter.

[0068] In this embodiment, the ends of the plurality of truncated cones with smaller diameters are respectively embedded in the plurality of first through holes 111 on the circuit board 11. Fig.18As shown, the first through hole 111 includes a fifth through hole 113 and a sixth through hole 114 that are interconnected. The diameter of the fifth through hole 113 is larger than the diameter of the sixth through hole 114, and the diameter of the fifth through hole 113 is larger than the minimum diameter of the truncated cone, and the diameter of the fifth through hole 113 is smaller than the maximum diameter of the truncated cone. The first end of the first copper column 12 is respectively embedded in the fifth through hole 113. Since the diameter of the fifth through hole 113 is larger than the minimum diameter of the truncated cone, and the diameter of the fifth through hole 113 is smaller than the maximum diameter of the truncated cone, the truncated cone can be embedded in the fifth through hole 113 under the self-weight of the first copper column 12.

[0069] The distance between the side surface of the first copper pillar 124 close to the circuit board 11 and the side surface of the circuit board 11 close to the first copper pillar 124 is the first distance. In this embodiment, the first distances corresponding to each of the multiple first copper pillars 12 are not limited, and the first distances corresponding to each of the multiple first copper pillars 12 can be the same or different, as long as the first copper pillar 12 can be vertically embedded in the first through hole 111. In this embodiment, pressure can also be applied to embed the first copper pillar 12 into the first through hole 111. Therefore, this embodiment avoids the step of detecting whether the second ends of the multiple copper pillars are planes, which can reduce the difficulty of the process.

[0070] Combine the following Fig.14 and Fig.15 , illustrating one possible implementation method of the first copper pillar 12 in the aforementioned embodiment

[0071] In this embodiment, the structure of the first end of the second copper pillar 14 is substantially the same as the structure of the first end of the first copper pillar 12 , and the second through hole 112 and the first through hole 111 on the circuit board 11 are substantially the same.

[0072] Specifically, the first end of the second copper column 14 includes a second copper column end 142, the second copper column end 142 is a truncated cone, and the diameter of the truncated cone gradually decreases in the direction away from the second end of the second copper column 14; wherein the ends with smaller diameters of the truncated cones are respectively embedded in the plurality of second through holes 112 on the circuit board. The second copper column 14 also includes a second copper column body 143 and a mounting portion 141, the second copper column end 142 is disposed at the first end of the second copper column body 143, and the mounting portion 141 is disposed at the second end of the second copper column body 143.

[0073] In actual production, the second copper pillar 14 is easily inserted crooked during the insertion into the second through hole 112, requiring multiple reworks, resulting in low production efficiency. To solve the above problems, this embodiment provides an improved second copper pillar 14 to reduce the difficulty of operation and improve production efficiency.

[0074] like Fig.16 and Fig.17As shown, the first end of the second copper column 14 is in an open-close structure to provide a buffer to ensure that the first end of the second copper column 14 can be stably inserted into the second through hole 112. The second copper column 14 includes a mounting portion 141, a second copper column end 142, and a second copper column body 143. The second copper column end 142 is arranged at the first end of the second copper column body 143, and the mounting portion 141 is arranged at the second end of the second copper column body 143. The second copper column end 142 includes a first opening and closing portion 1421 and a second opening and closing portion 1422. The first opening and closing portion 1421 and the second opening and closing portion 1422 are arranged on the first end of the second copper column body 143.

[0075] There is a gap between the first opening and closing portion 1421 and the second opening and closing portion 1422. Under the action of external force, the gap between the first opening and closing portion 1421 and the second opening and closing portion 1422 can be gradually reduced, so that the first end of the second copper column 14 is in interference connection with the second through hole 112. In this embodiment, the diameter of the second copper column end 142 (when not subjected to external force) is greater than the diameter of the second through hole 112. When the second copper column end 142 is inserted into the second through hole 112, the first opening and closing portion 1421 and the second opening and closing portion 1422 are both subjected to radial external force, and the gap between the first opening and closing portion 1421 and the second opening and closing portion 1422 can be gradually reduced, so that the first end of the second copper column 14 is in interference connection with the second through hole 112.

[0076] The first end of the second copper pillar 14 of this embodiment is an open structure, which can provide buffering. Moreover, the first end of the second copper pillar 14 can be deeply inserted into the second through hole 112, ensuring that the second copper pillar 14 is perpendicular to the plane where the circuit board 11 is located, avoiding multiple rework and improving production efficiency.

[0077] Combine the following Figure 19 to Figure 21 , briefly describe the main production process of the LED display screen of this application.

[0078] In the actual production, after the housing 13 is placed on the second ends of the plurality of first copper pillars 12, a jig is used to press the housing 13 from the side of the circuit board 11 away from the housing 13 and the side of the housing 13 away from the circuit board 11 (such as Fig.19 As shown, the direction indicated by the arrow is the direction of the pressing force), so that the side surface of the circuit board 11 away from the housing 13 is parallel to the side surface of the housing 13 away from the circuit board 11.

[0079] Furthermore, the LED lamp 123 is pressed to the sixth through hole 114 by using a jig, and the truncated cone is interference-connected with the fifth through hole 113 , so that the first copper column 12 is fixedly connected to the circuit board 11 .

[0080] Due to the pressing action of the jig, the plurality of first copper pillars 12 are close to the circuit board 11, and the ends of the plurality of first copper pillars 12 are further embedded in the fifth through hole 113. Since the ends of the plurality of first copper pillars 12 are truncated cones, the fifth through hole 113 is subjected to the radial extrusion force of the first copper pillar end 122, the aperture of the fifth through hole 113 is deformed, and the fifth through hole 113 forms an interference connection with the first copper pillar end 122, thereby fixing the circuit board 11 and the plurality of first copper pillars 12 in connection.

[0081] Due to the error problem in the preparation process of the first copper pillars 12, when the side surface of the circuit board 11 away from the shell 13 is parallel to the side surface of the shell 13 away from the circuit board 11, the interference amounts of the interference connections between the multiple first copper pillars 12 and the circuit board 11 are different. Fig. 20 and Fig.21 It shows the positional relationship between the first copper pillar 12 and the circuit board 11 when the first copper pillar 12 and the circuit board 11 are connected with different interference amounts.

[0082] Obviously, Fig. 20 The first copper column 124 contacts the circuit board 11. Fig.21 The first copper column 124 is spaced apart from the circuit board 11. Fig. 20 The interference amount of the first copper pillars 12 and the circuit board 11 is greater than Fig.21 The interference fit between the first copper pillars 12 and the circuit board 11 is sufficient, but the side surface of the circuit board 11 away from the housing 13 and the side surface of the housing 13 away from the circuit board 11 are still parallel.

[0083] Furthermore, Fig.21 The distance between the first copper column 124 and the circuit board 11 is greater than, Fig.13 The first distance between the first copper column 124 and the circuit board 11 is, therefore, Fig.21 The interference between the first copper pillar 12 and the sixth through hole 114 is greater than Fig.13 The interference between the first copper pillar 12 and the sixth through hole 114 is used to connect the first copper pillar 12 and the sixth through hole 114 through the larger interference between the first copper pillar 12 and the sixth through hole 114. The interference between the multiple first copper pillars 12 and the circuit board 11 is related to the size error of the first copper pillar 12, the size error of the circuit board 11 and the size error of the shell 13. Even if the size error of the first copper pillar 12, the size error of the circuit board 11 and the size error of the shell 13 all exist, the interference between the first copper pillar 12 and the circuit board 11 can offset the influence of the size error of the components. The LED display screen of the present application can avoid the influence of the size error of the components, and finally make the side surface of the circuit board 11 away from the shell 13 parallel to the side surface of the shell 13 away from the circuit board 11.

[0084] The process of embedding the second copper pillar 14 into the circuit board 11 is basically the same as the above-mentioned concept, and will not be described in detail here.

[0085] Different from the prior art, the present application provides an LED display screen. When there is a flatness error between a shell and a circuit board, the flatness error of the shell and the circuit board is offset by different interference fits between the first end of the first copper column and the circuit board, so that the surface of the circuit board on the side away from the shell is parallel to the surface of the shell on the side away from the circuit board. This avoids the surface flatness error of the LED display screen caused by the flatness error of the circuit board and the shell of the LED display screen, ensures the flatness of the LED display screen, and improves the display performance of the LED display screen.

[0086] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An LED display screen, characterized in that: The LED display screen comprises: a circuit board, a plurality of first copper pillars and a shell; the circuit board is provided with a plurality of first through holes, the first ends of the plurality of first copper pillars are respectively embedded in the plurality of first through holes on the circuit board, and the second ends of the plurality of first copper pillars are accommodated in the through holes on the shell side; wherein the first ends of the plurality of first copper pillars are interference-connected with the plurality of first through holes on the circuit board, and a side surface of the circuit board away from the shell is parallel to a side surface of the shell away from the circuit board; The first end of the first copper column includes a first copper column end, the first copper column end is a truncated cone, and the diameter of the truncated cone gradually decreases in a direction away from the second end of the first copper column; wherein the ends of the truncated cone with a smaller diameter are respectively embedded in the plurality of first through holes on the circuit board; The first end of the copper column also includes an LED lamp, and the LED lamp is fixed to the end of the truncated cone with a smaller diameter; The first through hole includes a fifth through hole and a sixth through hole which are interconnected; the LED lamp is accommodated in the sixth through hole, and the frustum is interference-connected with the fifth through hole so that the first copper column is fixedly connected with the circuit board.

2. The LED display screen according to claim 1, characterized in that: The LED display screen also includes a second copper column; a plurality of second through holes are provided on the circuit board, and a plurality of third through holes corresponding to the second through holes are provided on the shell; the plurality of second copper columns respectively penetrate the plurality of third through holes, and the first ends of the plurality of second copper columns are respectively embedded in the plurality of second through holes on the circuit board.

3. The LED display screen according to claim 2, characterized in that: A mounting portion is provided at the second end of the second copper column, wherein a surface of the circuit board on one side away from the mounting portion is parallel to a surface of the mounting portion on one side away from the circuit board; the mounting portion is used to accommodate a magnet to fix the LED display screen on the box by magnet adsorption.

4. The LED display screen according to claim 2, characterized in that: The plurality of first through holes are arranged in a matrix on the circuit board, the number of the second through holes and the third through holes is four, the second through holes are located at the four corners of the circuit board, and the third through holes are located at the four corners of the housing.

5. The LED display screen according to claim 2, characterized in that: The first end of the second copper column includes a second copper column end, the second copper column end is a frustum, and the diameter of the frustum gradually decreases in the direction away from the second end of the second copper column; wherein the end with the smaller diameter of the frustum is respectively embedded in the multiple second through holes on the circuit board.

6. The LED display screen according to claim 2, characterized in that: The first end of the second copper column includes a second copper column end and a second copper column body, the second copper column end includes a first opening and closing portion and a second opening and closing portion, the first opening and closing portion and the second opening and closing portion are arranged on the second copper column body; wherein, there is a gap between the first opening and closing portion and the second opening and closing portion, and under the action of external force, the gap between the first opening and closing portion and the second opening and closing portion can be gradually reduced.

7. The LED display screen according to claim 1, characterized in that: The LED display screen also includes screws, a threaded hole is provided at the second end of the first copper column, and a plurality of fourth through holes are provided on the shell; the second end of the first copper column is accommodated in the fourth through hole, and the shell is threadedly connected to the first copper column by screws.

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