WO2022133649A1

WO2022133649A1 - Led display module and led display screen

Info

Publication number: WO2022133649A1
Application number: PCT/CN2020/138029
Authority: WO
Inventors: 王胜刚; 綦迪; 陈晨初; 周永文
Original assignee: 深圳市艾比森光电股份有限公司
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2022-06-30

Abstract

Disclosed in the present application are an LED display module and an LED display screen. The LED display module comprises a mask, a lamp panel, a bottom housing, and a connection assembly. A gap is provided between the mask and the bottom housing, and the lamp panel and the connection assembly are disposed in the gap; the mask has a back surface, and the back surface faces the lamp panel; the connection assembly comprises a first connector and a second connector; a first end of the first connector is fixedly connected to the back surface, and a first end of the second connector is fixedly connected to the bottom housing; a second end of the first connector passes through the lamp panel and is connected to a second end of the second connector, or the second end of the second connector passes through the lamp panel and is fixedly connected to the second end of the first connector. Since both the two connectors are relatively short and respectively extend out of the mask and the bottom housing, the positioning requirements are relatively low; and the two connectors are directly fixed, without using other components, thereby simplifying the assembly steps, reducing the assembly difficulty of the mask and the housing, simplifying the assembly process, and improving the assembly efficiency.

Description

LED display module and LED display

technical field

The present application relates to the field of display technology, and in particular, to an LED display module and an LED display screen.

Background technique

Light emitting diode (LED) display has the advantages of wide color gamut, high brightness, large viewing angle, low power consumption and long life, so in the field of display, LED display is widely used. For example, the more common securities trading and financial information display, airport flight dynamic information display, port and station passenger guidance information display, stadium information display, road traffic information display, power dispatching and vehicle dynamic tracking and other dispatching command center information display, shopping mall shopping Display of business publicity information and advertising media products in service areas such as centers.

No matter which of the above application fields, LED display screens may be set on the wall or on the ground, especially in public facilities such as landmark arrows in shopping malls. clearly seen by the guests. Compared with the installation on the wall, when the LED display screen is set on the ground, pedestrians may often pass by and step on it; therefore, the anti-skid, wear-resistant and sturdy performance of the LED display screen set on the ground is proposed. high demands.

However, the current LED displays used on the ground are generally composed of multiple display boxes, and each display box includes a box frame and multiple display modules, each display module includes a light panel, a mask and a The housing and the lamp board include components such as a printed circuit board, LED lamp beads, and drive circuits, wherein the LED lamp beads are patched on the printed circuit board, and the drive circuit is also integrated on the printed circuit board. The light board is fixed in the cavity formed by the mask and the housing, and the light emitting surface of the light board, that is, the side of the printed circuit board on which the LED lamp beads are arranged, faces the mask. After the LED display screen of this structure is installed on the ground, the mask is generally flush with the ground, so the mask becomes the most trampled part.

However, for the LED display screen with the above structure, in general, the edges of the mask and the bottom case are fixedly connected by long bolts, and the length of the long bolts is relatively long, so the positioning requirements of the bottom case and the mask are very high, which leads to increased assembly difficulty, and also It needs to be tightened by tightening the nut, the steps are cumbersome and the assembly efficiency is low.

SUMMARY OF THE INVENTION

The purpose of the present application is to provide an LED display module and an LED display, which can reduce the assembly difficulty of the mask and the bottom case, simplify the assembly process, and increase the assembly efficiency.

A first aspect of the present application provides an LED display module, comprising: a mask, a lamp board, a bottom case and a connecting assembly; a gap is formed between the mask and the bottom shell, and the lamp board and the connecting assembly are arranged in the gap; facing the light board; the face shield is fixedly connected to the bottom case through the connecting assembly; the connecting assembly includes a first connecting piece and a second connecting piece; the first end of the first connecting piece is fixedly connected with the back, and the first end and the bottom of the second connecting piece The shell is fixedly connected; the second end of the first connecting piece passes through the lamp board and the second end of the second connecting piece is fixedly connected, or the second end of the second connecting piece passes through the light board and the second end of the first connecting piece Fixed connection.

In the LED display module provided by the embodiments of the present application, the first connector is provided to be fixed with the mask, the second connector is provided to be fixed to the bottom case, and then the first connector and the second connector are fixed, so that the mask and the second connector are fixed. Bottom case fixed connection. Because the respective lengths of the first connecting piece and the second connecting piece are relatively short, and the first connecting piece and the second connecting piece protrude from the mask and the bottom case, respectively, their positioning requirements are relatively low; The connecting piece can be directly fixed without being fixed by other components, which simplifies the assembling steps, thereby reducing the assembling difficulty of the mask and the shell, simplifying the assembling process, and increasing the assembling efficiency.

Optionally, the second end of the first connecting piece is provided with a connecting hole, and the second end of the second connecting piece is fixed in the connecting hole. As a result, the first connector and the second connector can be fixedly connected without the cooperation of other components, the components required for assembly are reduced, the assembly process is simplified, and the assembly efficiency is increased.

Optionally, the first connecting piece is cylindrical, and includes a fixed section, an anti-separation section and a connecting section that are fixedly connected in sequence; the outer diameter of the anti-separation section is smaller than the outer diameter of the fixed section and the outer diameter of the connecting section; The first hole and the second hole are stepped, the diameter of the first hole is larger than the diameter of the second hole; the fixing section is fixed in the first hole, and the anti-detachment section is located in the second hole; The second end is fixedly connected. Thereby, the first connecting piece can be prevented from falling off from the mask, and the connecting section is convenient for being fixedly connected with the second connecting piece.

Optionally, the outer periphery of the fixing section is provided with saw teeth extending in the axial direction, and the saw teeth are in contact with the side wall of the first hole. The sawtooth serves to prevent the rotation of the first connecting piece, so that the operator can fix the first connecting piece and the second connecting piece more quickly and accurately.

Optionally, the connecting section and the back are fixed and connected by fixing glue. The fixing glue can play the role of preventing the rotation of the first connecting piece.

Optionally, the LED display module further includes a support assembly, and the support assembly is arranged in the gap; the support assembly includes a support boss and a support column; the first end of the support boss is fixedly connected to the back, and the first end of the support column and the bottom The shells are fixedly connected; the second end of the support boss passes through the lamp board and contacts the second end of the support column, or the second end of the support column passes through the lamp board and contacts the support boss. The support assembly enables the LED display module to be dissipated from the stress generated by the external force when the LED display module is acted on by the external force, thereby reducing the risk of the mask being broken.

Optionally, the second end of the support boss is provided with a support table, and the second end of the support column is provided with a support plane; the support table and the support plane are in contact. The surface-to-surface contact can increase the structural strength, increase the force point, and thus better disperse the stress.

Optionally, the edge of the back is provided with a rising edge; the rising edge surrounds the edge of the back; the bottom case is located within the range surrounded by the rising edge, and the side wall of the bottom case and the side wall of the rising edge are abutted. The rising edge protects the gap between the bottom case and the mask, prevents foreign objects such as water from entering the gap and affects the use of the lamp panel, and can also prevent the lamp panel from leaking light.

Optionally, the mask includes a laminated and fixed light mixing plate layer and a glass plate layer. The two-layer structure of the mask has strong structural strength and is not easy to break, which can prolong the life of the LED display.

Optionally, the light mixing plate layer is black; the light transmittance z of the light mixing plate layer is greater than or equal to 48% and less than or equal to 52%. That is, the light mixing board layer is black and translucent, so that when the light board does not emit light, that is, when the LED display screen is in a black state, the LED lamp beads are invisible from the outside, thereby improving the aesthetics. In addition, the black translucent light-mixing plate layer can also effectively improve the problem of light crosstalk between adjacent pixels, enhance the display contrast, and improve the display effect.

Optionally, the material of the glass plate layer includes tempered frosted glass. Tempered frosted glass has strong strength, which can increase the structural strength of the mask, and the surface friction is large, which can prevent light and play a non-slip effect, thereby improving the display effect and increasing the safety factor.

Optionally, the mask further includes an adhesive layer, and the light mixing plate layer and the glass plate layer are fixed by the adhesive layer. The light mixing plate layer and the glass plate layer can be reliably fixed simply and quickly through the adhesive layer, and the cost is also relatively low.

Optionally, the LED display module further includes: a splicing connection board; the LED display module includes two or more bottom shells; and the two adjacent bottom shells are fixedly connected by a splicing connection board. The splicing connecting plate connects the bottom case into a whole, which can increase the structural strength of the bottom case, better carry the external force from the mask, and disperse the concentrated stress, thereby prolonging the service life of the LED display module.

Optionally, the splicing connection plate covers the splicing gap between two adjacent bottom shells. Blocking the splicing gap can better connect the bottom shells and increase the strength of each bottom shell connection.

A second aspect of the present application provides an LED display screen, including the LED display module of any one of the first aspect of the present application.

Description of drawings

In order to illustrate the technical solutions of the present application more clearly, the following briefly introduces the accompanying drawings that are required in the implementation manner.

1 is a cross-sectional view of an LED display module provided by an embodiment of the present application;

Fig. 2 is the enlarged view at C of Fig. 1;

3 is an axonometric view of a first connector provided by an embodiment of the present application;

4 is another cross-sectional view of an LED display module provided by an embodiment of the present application;

5 is an axonometric view of a mask of an LED display module provided by an embodiment of the present application;

Fig. 6 is the enlarged view of A place of Fig. 5;

7 is an axonometric view of a bottom case of an LED display module provided by an embodiment of the present application;

Fig. 8 is an enlarged view at B of Fig. 7;

FIG. 9 is an exploded view of an LED display module provided by an embodiment of the present application.

Description of reference numbers:

The mask 100, the first hole 101, the second hole 102, the rising edge 103, the light mixing plate layer 110, the glass plate layer 120, the adhesive layer 130, the bottom case 200, the horizontal slit 210, the vertical slit 220, the connecting assembly 300, First connecting piece 310, fixing section 311, sawtooth 3111, anti-detachment section 312, connecting section 313, connecting hole 3131, fixing glue 314, second connecting piece 320, support assembly 400, support boss 410, support column 420, splicing Connection board 500 , main connection board 510 , extension connection board 520 .

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

In general, an LED display is made up of multiple LED display cabinets, and each LED display cabinet includes a cabinet frame and multiple display modules; multiple display modules are fixed on the cabinet frame A complete LED display box is formed on it. The display module includes components such as a light panel, a mask 100 and a housing, and the mask 100 and the housing are respectively located on both sides of the light panel. The lamp board includes a printed circuit board, LED lamp beads and driving circuits arranged on the printed circuit board, and so on.

Based on the above LED display screen, please refer to FIG. 1 to FIG. 8 , and the LED display module provided by the embodiment of the present application is described in detail below, including: a mask 100 , a light board, a bottom case 200 and a connection assembly 300 .

There is a gap between the mask 100 and the bottom case 200 , and the light board and the connecting assembly 300 are arranged in the gap; the mask 100 has a back, which faces the light board;

The connecting assembly 300 includes a first connecting member 310 and a second connecting member 320; the first end of the first connecting member 310 is fixedly connected to the back surface, and the first end of the second connecting member 320 is fixedly connected to the bottom case 200; the first connecting member The second end of 310 is fixedly connected to the second end of the second connecting member 320 through the lamp board, or the second end of the second connecting member 320 is fixedly connected to the second end of the first connecting member 310 through the lamp board.

In the LED display module provided by the embodiment of the present application, the first connector 310 and the mask 100 are arranged to be fixed, the second connector 320 is arranged to be fixed to the bottom case 200 , and then the first connector 310 and the second connector 320 are arranged to be fixed. Fixing, so that the mask 100 and the bottom case 200 are fixedly connected. Because the respective lengths of the first connecting member 310 and the second connecting member 320 are relatively short, and the first connecting member 310 and the second connecting member 320 respectively protrude from the mask 100 and the bottom case 200, the positioning requirements thereof are relatively low; The first connector 310 and the second connector 320 can be directly fixed without fixing other components, which simplifies the assembly steps, thereby reducing the difficulty of assembling the mask 100 and the shell, simplifying the assembly process, and increasing the assembly efficiency.

In an optional embodiment, please refer to FIG. 3 , a connecting hole 3131 is formed at the second end of the first connecting member 310 , and the second end of the second connecting member 320 is fixed in the connecting hole 3131 . Specifically, the second end of the second connecting member 320 can be fixed in the connecting hole 3131 through threads or interference fit. Specifically, the screw fitting method may be to use the second connecting piece 320 with external threads to screw into the hole on the bottom case 200 , and then continue to screw until the second connecting piece 320 is screwed into the connecting hole 3131 . The specific method of the interference fit is that the second connecting piece 320 is pre-fixed on the bottom case 200 , and then after the second connecting piece 320 is aligned with the first connecting piece 310 , the second connecting piece 320 is inserted into the connecting hole of the first connecting piece 310 . 3131 It is enough to make the two interference fit. Regardless of interference fit or threaded connection, the first connector 310 and the second connector 320 can be fixedly connected without the need for other components to cooperate, which reduces the number of components required for assembly, simplifies the assembly process, and increases assembly efficiency.

In an optional implementation manner, please refer to FIG. 3 , the first connecting member 310 is cylindrical, and includes a fixing section 311 , an anti-detachment section 312 and a connecting section 313 that are fixedly connected in sequence. The outer diameter of the anti-separation section 312 is smaller than the outer diameter of the fixing section 311 and the outer diameter of the connecting section 313; there are stepped first holes 101 and second holes 102 on the back, and the diameter of the first hole 101 is larger than that of the first hole 101. The diameter of the two holes 102 . Specifically, the fixing section 311 is fixed in the first hole 101 , the anti-detachment section 312 is located in the second hole 102 ; the connecting section 313 is fixedly connected to the second end of the second connecting piece 320 .

In the first connector 310 of the above structure, since the outer diameter of the anti-detachment section 312 is smaller than the outer diameter of the fixed section 311 and the outer diameter of the connecting section 313, an annular groove is equivalent to an annular groove between the anti-detachment section 312 and the fixed section 311. , then, after the first connecting member 310 is installed in the first hole 101 and the second hole 102, the fixing section 311 is caught by the step between the first hole 101 and the second hole 102, thereby preventing the first connection Piece 310 is dislodged from mask 100 . The connecting section 313 extends out of the second hole 102 so as to be fixedly connected with the second connecting member 320 .

In an optional implementation manner, please refer to FIG. 3 , the outer periphery of the fixing section 311 is provided with serrations 3111 extending in the axial direction, and the serrations 3111 are in contact with the side wall of the first hole 101 . The serrations 3111 are arranged on the outer periphery of the fixing section 311 to increase the frictional force between the fixing section 311 and the side wall of the first hole 101 . Then, when the first connecting piece 310 and the second connecting piece 320 are connected by screws, the frictional force It can play the role of preventing the first connecting member 310 from rotating, so that the operator can fix the first connecting member 310 and the second connecting member 320 faster and more accurately.

In an optional embodiment, please refer to FIG. 6 , the connecting segment 313 and the back surface are fixedly connected by a fixing glue 314 . That is to say, the fixing glue 314 can be applied around the connecting section 313 on the back of the mask 100 so as to fix the connecting section 313 more firmly. It plays the role of preventing the rotation of the first connecting member 310 , so that the operator can fix the first connecting member 310 and the second connecting member 320 faster and more accurately.

In an optional embodiment, please refer to FIG. 4 , the LED display module further includes a support component 400 , and the support component 400 is disposed in the gap. Specifically, the support assembly 400 includes a support boss 410 and a support column 420; the first end of the support boss 410 is fixedly connected to the back, the first end of the support column 420 is fixedly connected to the bottom case 200; the second end of the support boss 410 is fixedly connected The end passes through the lamp board and contacts the second end of the support column 420 , or the second end of the support column 420 passes through the lamp board and contacts the support boss 410 .

Those skilled in the art can understand that the number of the support assemblies 400 may be two or more. In the support assemblies 400, the support bosses 410 and the support columns 420 are in contact, so as to add more flexibility to the mask 100 and the bottom case 200. There are many contact points, so that when the mask 100 is stepped on, the force can be balanced by the support assembly 400, and the force can also be transmitted to the bottom case 200 through the support assembly 400, thereby reducing the chance of the mask 100 being stepped on. risk and prolong the service life of the LED display.

In an optional embodiment, the second end of the support boss 410 is provided with a support table, and the second end of the support column 420 is provided with a support plane; the support table and the support plane are in contact. As a result, the support boss 410 and the support column 420 are in surface-to-surface contact, which can increase the contact area, thereby dispersing the stress concentration phenomenon caused by the force on the mask 100 being stepped on, preventing the mask 100 from cracking due to the stress concentration phenomenon, and prolonging the LED display. life of the screen.

In an optional embodiment, please refer to FIG. 6 , the edge of the back is provided with a rising edge 103 ; the rising edge 103 surrounds the edge of the back. Specifically, the bottom case 200 is located within the range surrounded by the rising peripheral edge 103 , and the side wall of the bottom case 200 and the side wall of the rising peripheral edge 103 abut against each other. Therefore, the bottom case 200 is embedded on the mask 100, which can prevent foreign matter such as moisture from entering the gap between the mask 100 and the housing, and can also prevent the light from leaking out when the LED lamp beads on the light board emit light, thereby improving the display. Effect.

In an optional embodiment, please refer to FIG. 1 , the mask 100 includes a light mixing plate layer 110 and a glass plate layer 120 which are laminated and fixed. That is, the mask 100 is composed of two layers, the light mixing plate layer 110 and the glass plate layer 120, so that the thickness of the mask 100 can be increased, the structural strength of the mask 100 can be strengthened, and the ability of the mask 100 to resist the risk of external forces can be increased.

In an optional embodiment, the light mixing plate layer 110 is black; the light transmittance z of the light mixing plate layer 110 is greater than or equal to 48% and less than or equal to 52%. That is, the light mixing plate layer 110 is translucent black, so that in the black screen state, when the observer is very close to the LED display screen, the LED lamp beads under the mask 100 cannot be seen. Aesthetics are higher. In addition, the black translucent light-mixing plate layer can also effectively improve the problem of light crosstalk between adjacent pixels, enhance the display contrast, and improve the display effect.

In an optional embodiment, the material of the glass plate layer 120 includes tempered frosted glass. By using tempered frosted glass, on the one hand, the structural strength of the mask 100 can be increased, and on the other hand, the friction force on the surface of the mask 100 can be increased, which can play an anti-slip effect, increase the safety of the LED display screen, and also solve the problem of reflection and improve the display effect. .

In an optional embodiment, please refer to FIG. 1 , the mask 100 further includes an adhesive glue layer 130 , and the light mixing plate layer 110 and the glass plate layer 120 are fixed by the adhesive glue layer 130 . Therefore, the light mixing plate layer 110 and the glass plate layer 120 can be fixed simply and quickly through the adhesive layer 130 , and the cost is low.

In an optional embodiment, please refer to FIG. 9 , the LED display module further includes a splicing connection board 500; the LED display module includes two or more bottom shells 200; two adjacent bottom shells 200 pass through The splice connection plate 500 is fixedly connected. The bottom case 200 is connected into a whole by the splicing connecting plate 500, which can increase the structural strength and reduce the risk of the LED display screen falling apart.

In an optional implementation manner, the splicing connection plate 500 shields the splicing gap between two adjacent bottom shells 200 . That is, the splicing connection plate 500 can not only connect the bottom shells 200, but also block the splicing gaps between the bottom shells 200, so that the shell formed by splicing the bottom shells 200 is more beautiful. The splicing seam can be a transverse seam or a longitudinal seam.

Since one mask 100 may be connected to one bottom case 200 correspondingly, it may also be correspondingly connected to multiple bottom cases 200 . In the case that one face mask 100 is correspondingly connected to multiple bottom shells 200 , the above-mentioned splicing connecting plates 500 may be provided on both the edge and the middle of the spliced shell. Taking the splicing of four bottom shells 200 into a shell as an example, the four bottom shells 200 are all square, and the spliced shell is also in a square shape. The housing now has a transverse slot 210, a longitudinal slot 220 and four sides. The four sides include two oppositely arranged long sides and two oppositely arranged short sides. Of course, if the shape of the bottom case 200 is a square, the lengths of the long side and the short side are equal.

Four bottom shells 200 are spliced to form a shell, and the four shells can be connected to form a whole by three pieces of the above-mentioned splicing connecting plates 500 . Specifically, the three splicing connection plates 500 are all disposed on the side of the bottom case 200 away from the mask 100 , two of the splicing connection plates 500 are located at the long edge of the side of the bottom case 200 away from the mask 100 , and the other splicing connection plate 500 is located at the side of the bottom case 200 facing away from the mask 100 . The middle part of the spliced shell.

In detail, the splice connection board 500 includes a main connection board 510 and an extension connection board 520 , and the extension connection board 520 and the main connection board 510 are fixedly connected. The length of the main connecting plate 510 is equal to the length of the long side of the casing, and the extending connecting plate 520 can cover the transverse slit 210 .

Then, among the three splicing and connecting boards 500, the two splicing and connecting boards 500 located at the long edge of the bottom case 200 facing away from the mask 100, the main connecting board 510 of one splicing and connecting board 500 is fixed to the two bottom shells 200 on the left side. For connection, the extension connecting plate 520 of one of the splicing connecting plates 500 covers the transverse gap 210 between the two bottom shells 200 on the left side, and is respectively fixed to the two bottom shells 200 on the left side. The main connecting plate 510 of the other splicing connecting plate 500 is fixedly connected to the two bottom shells 200 on the right side, and the extending connecting plate 520 of the other splicing connecting plate 500 covers the transverse gap between the two bottom shells 200 on the right side 210, and are respectively fixed to the two bottom shells 200 on the right side. Of course, the extending connecting plate 520 may cover the entire lateral slit 210 , or may cover part of the lateral slit 210 .

The splicing connecting plate 500 located in the middle of the spliced shell has the entire longitudinal slit 220 of the main connecting plate 510, and the extending connecting plate 520 covers part of the lateral gap 210 between the two bottom shells 200 on the left side, and covers the two sides on the right side. Part of the transverse gap 210 between the bottom shells 200 , and the extending connecting plate 520 is fixedly connected to the four bottom shells 200 respectively.

In the case where the splicing connecting plate 500 is located at the edge of the casing, the main connecting plate 510 is fixedly connected with each bottom shell 200 located at the edge, and extends from one end of the long side to the other end; the extending connecting plate 520 and the adjacent The two bottom shells 200 are fixedly connected and extend to cover part of the lateral gap 210 of the two adjacent bottom shells 200 .

When the splicing connecting plate 500 is located in the middle of the casing, the main connecting plate 510 is fixedly connected to the bottom shells 200 located in the middle, and the main connecting plate 510 covers the longitudinal gap 220; The casings are fixedly connected and cover the transverse slits 210 formed by the four casings.

In addition, a positioning pin may be provided on the side of the bottom shell 200 away from the mask 100 , the positioning pin passes through the splicing connecting plate 500 and is used for positioning the bottom shell 200 and the box frame when the bottom shell 200 is connected to the box frame.

The embodiments of the present application are described in detail above, and specific examples are used herein to illustrate the principles and implementations of the present application. The descriptions of the above embodiments can be used to help understand the methods and core ideas of the present application.

Claims

An LED display module is characterized by comprising: a mask, a lamp board, a bottom case and a connecting assembly;

There is a gap between the face shield and the bottom case, and the lamp board and the connecting assembly are arranged in the gap; the face shield has a back face, and the back face faces the lamp board; the face shield passes through the connecting assembly be fixedly connected with the bottom case;

The connecting assembly includes a first connecting piece and a second connecting piece; the first end of the first connecting piece is fixedly connected with the back surface, and the first end of the second connecting piece is fixedly connected with the bottom case; The second end of the first connecting piece is fixedly connected through the light board and the second end of the second connecting piece, or the second end of the second connecting piece passes through the light board and the second end of the second connecting piece. The second end of the first connector is fixedly connected.
The LED display module according to claim 1, wherein the second end of the first connecting member is provided with a connecting hole, and the second end of the second connecting member is fixed in the connecting hole.
The LED display module according to claim 1 or 2, wherein the first connector is cylindrical, and includes a fixing section, a disengagement prevention section and a connecting section that are fixedly connected in sequence;

The outer diameter of the anti-detachment section is smaller than the outer diameter of the fixing section and the outer diameter of the connecting section; the back surface is provided with a stepped first hole and a second hole, and the diameter of the first hole is greater than the diameter of the second hole;

The fixing segment is fixed in the first hole, and the anti-detachment segment is located in the second hole; the connecting segment is fixedly connected with the second end of the second connecting piece.
The LED display module according to claim 3, wherein the outer periphery of the fixing section is provided with saw teeth extending in the axial direction, and the saw teeth are in contact with the side wall of the first hole.
The LED display module according to claim 3 or 4, wherein the connecting section and the back surface are fixedly connected by a fixing glue.
The LED display module according to any one of claims 1 to 5, wherein the LED display module further comprises a support component, and the support component is disposed in the gap;

The support assembly includes a support boss and a support column; the first end of the support boss is fixedly connected to the back surface, and the first end of the support column is fixedly connected to the bottom case; The second end passes through the lamp board and contacts the second end of the support column, or the second end of the support column passes through the lamp board and contacts the support boss.
The LED display module according to claim 6, wherein the second end of the support boss is provided with a support table, the second end of the support column is provided with a support plane; the support table and the The support planes are in contact.
The LED display module according to any one of claims 1 to 7, wherein the edge of the back is provided with a rising edge; the rising edge surrounds the edge of the back;

The bottom case is located in a range surrounded by the rising peripheral edge, and the side wall of the bottom case and the side wall of the rising peripheral edge abut against each other.
The LED display module according to any one of claims 1 to 8, wherein the mask comprises a light mixing plate layer and a glass plate layer that are laminated and fixed.
The LED display module according to claim 9, wherein the light mixing plate layer is black; the light transmittance z of the light mixing plate layer is greater than or equal to 48% and less than or equal to 52%.
The LED display module according to claim 9 or 10, wherein the material of the glass plate layer comprises tempered frosted glass.
The LED display module according to any one of claims 9 to 11, wherein the mask further comprises an adhesive layer, and the light mixing plate layer and the glass plate layer pass through the adhesive layer. fixed.
The LED display module according to any one of claims 1 to 12, wherein the LED display module further comprises: a splicing connection board;

The LED display module includes two or more of the bottom shells;

The two adjacent bottom shells are fixedly connected by the splicing connecting plate.
The LED display module according to claim 13, wherein the splicing connection plate blocks the splicing gap between the two adjacent bottom shells.
An LED display screen is characterized by comprising the LED display module according to any one of claims 1 to 14.