CN106297576B

CN106297576B - LED box body, LED display screen and assembling method thereof

Info

Publication number: CN106297576B
Application number: CN201610876856.4A
Authority: CN
Inventors: 江忠永
Original assignee: Hangzhou Multi Color Optoelectronics Co ltd
Current assignee: Hangzhou Multi Color Optoelectronics Co ltd
Priority date: 2016-10-08
Filing date: 2016-10-08
Publication date: 2023-04-11
Anticipated expiration: 2036-10-08
Also published as: CN106297576A

Abstract

The application discloses an LED box body, an LED display screen and an assembling method of the LED display screen. The LED box includes: a mounting surface and a back surface facing each other and for fixing the LED module and the support frame, respectively; and a plurality of side surfaces adjoining the mounting surface and the back surface and collectively defining a housing of the LED box, wherein the plurality of side surfaces includes a first set of side surfaces and a second set of side surfaces, the first set of side surfaces and the second set of side surfaces respectively include first side surfaces and second side surfaces adjacent to each other, the first set of side surfaces includes a step, and the step includes a side wall extending from the mounting surface to the back surface and a bottom surface extending from a bottom end of the side wall. The LED box body utilizes the step on the side surface to shield gaps between the LED modules, thereby realizing the standardized assembly of the LED display screen and improving the reliability and the durability of the LED display screen in severe environment.

Description

LED box body, LED display screen and assembling method thereof

Technical Field

The invention relates to the LED display technology, in particular to an LED box body for an LED display screen, the LED display screen and an assembling method of the LED box body.

Background

The Light Emitting Diode (LED) display screen has the following advantages: high gray scale, wide viewing angle, rich color, and customizable screen shape. Therefore, the LED display screen is widely used in various fields such as industry, traffic, commercial advertisement, information distribution, sports competition, and the like.

The pixel elements used in LED display screens are LEDs. In order to obtain a large display area and resolution, the LED screen usually includes a plurality of LED boxes. A plurality of LED modules are installed on the LED box body. Each LED module includes an array of a plurality of LEDs mounted on a printed circuit board and a driving circuit. In an LED display screen, an LED housing not only provides a mechanical support surface for the LED modules, but also can accommodate various control circuits and wires therein, thereby enabling the driving and control of multiple LED modules.

However, in the design of splicing the LED box, due to manufacturing errors, a gap tolerance needs to be reserved for installation, and the gap is left to have a light transmission phenomenon when viewed from the front to the back. When the LED display screen displays pictures, if the gaps among the LED modules are transparent, the overall display effect is affected. Especially when the back light is very strong, the light transmitted through the gap seriously interferes with the display of the LED display screen (the brightness of the light transmitted through the back light is not consistent with that of the light transmitted through the front display screen). The design considers how to block the light transmission caused by the gap. One way is to stick a black insulating tape at the gap on the back of the LED display screen, which solves the problem of light transmission, but increases the use of the black insulating tape. Because the screen is used on site, the screen is difficult to be inclined and unfinished, and the attractiveness and standardized assembly of the whole display screen are reduced. In the application of the outdoor LED display screen, the black insulating adhesive tape on the back of the LED display screen can fall off along with the time extension or the sun and rain, so that gaps and light transmission occur again.

Therefore, it is desirable to further improve the design of the LED box to block the gap between the LED modules and to improve the reliability and durability of the LED display screen in harsh environments.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide an improved LED box, an LED display panel and an assembling method thereof, in which a gap between LED modules is blocked by a step on a side surface of the LED box, thereby achieving standardized assembly of the LED display panel and improving reliability and durability of the LED display panel in a severe environment.

According to an aspect of the present invention, there is provided an LED box including: a mounting surface and a back surface facing each other and for fixing the LED module and the support frame, respectively; and a plurality of side surfaces adjoining the mounting surface and the back surface and collectively defining a housing of the LED box, wherein the plurality of side surfaces includes a first set of side surfaces and a second set of side surfaces, the first set of side surfaces and the second set of side surfaces include first side surfaces and second side surfaces adjacent to each other, respectively, the first set of side surfaces include a step, and the step includes a side wall extending from the mounting surface to the back surface and a bottom surface extending from a bottom end of the side wall.

Preferably, the height of the step corresponds to the height of the side wall, and the width of the step corresponds to the width of the bottom surface.

Preferably, the height of the step is smaller than the thickness of the LED box body.

Preferably, the height of the step is in the range of 0.2 mm to 5 mm.

Preferably, the width of the step is in the range of 1 mm to 10 mm.

Preferably, the second set of sides includes a step including a side wall extending from the mounting surface to the back surface and a bottom surface extending from a bottom end of the side wall.

Preferably, the first side of the second set of sides is a right side relative to the mounting surface, the second side of the second set of sides is a top side relative to the mounting surface, the first side of the first set of sides is a left side relative to the mounting surface, and the second side of the first set of sides is a lower side relative to the mounting surface.

Preferably, the first side of the first group of sides is a right side relative to the mounting surface, the second side of the first group of sides is a lower side relative to the mounting surface, the first side of the second group of sides is a left side relative to the mounting surface, and the second side of the second group of sides is a top side relative to the mounting surface.

According to another aspect of the present invention, there is provided an LED display screen, comprising: a support frame; and a plurality of box assemblies mounted on the support frame, wherein the plurality of box assemblies respectively include an LED box and a plurality of LED modules mounted on the LED box, the plurality of LED modules of the plurality of box assemblies are spliced together to form a whole display screen, and the centers of the plurality of LED modules mounted on one box assembly are offset relative to the center of the one box assembly.

Preferably, the LED housing includes: a mounting surface and a back surface facing each other and used for fixing the LED module and the support frame, respectively; and a plurality of side surfaces adjoining the mounting surface and the back surface and collectively defining a housing of the LED box, wherein the plurality of side surfaces includes a first set of side surfaces and a second set of side surfaces, the first set of side surfaces and the second set of side surfaces include first side surfaces and second side surfaces adjacent to each other, respectively, the first set of side surfaces include a step, and the step includes a side wall extending from the mounting surface to the back surface and a bottom surface extending from a bottom end of the side wall.

Preferably, the direction of the offset comprises one selected from up, down, left, right, left-up, left-down, right-up, right-down.

Preferably, the plurality of LED modules includes a third group of sides adjoining each other inside a corresponding one of the case assemblies and a fourth group of sides adjoining each other between adjacent two of the case assemblies.

Preferably, the fourth set of sides of the plurality of LED modules are aligned with the step edge or above the bottom surface of the step.

Preferably, a first slit is formed between the fourth group of sides of the plurality of LED modules, a second slit is formed between the LED cases of the plurality of case assemblies, and the first slit and the second slit are staggered from each other in a direction parallel to a surface direction of the plurality of LED modules.

Preferably, the step is adapted to receive at least some of the plurality of LED modules to maintain flatness when the surfaces of the plurality of LED modules are offset from each other.

Preferably, the support frame comprises: a plurality of transverse beams parallel to each other; and the top ends and the bottom ends of the plurality of longitudinal members are fixed on the plurality of transverse beams, and the LED box body is fixed on the plurality of longitudinal members.

Preferably, the method further comprises the following steps: and the fasteners are used for fixing the LED box body on the longitudinal members.

Preferably, the plurality of fasteners are respectively fixed on the back of a corresponding LED box body.

Preferably, the fasteners are fixed at the positions of the adjacent side edges and the adjacent corners of the adjacent LED boxes.

Preferably, the height of the step is in the range of 0.2 mm to 5 mm.

Preferably, the width of the step is in the range of 1 mm to 10 mm.

Preferably, the first side of the first set of sides is a right side relative to the mounting surface, the second side of the first set of sides is a lower side relative to the mounting surface, the first side of the second set of sides is a left side relative to the mounting surface, and the second side of the second set of sides is a top side relative to the mounting surface.

According to another aspect of the present invention, there is provided an assembling method of an LED display screen, including: fixing a plurality of LED modules on the installation surface of the LED box body, so that the LED modules are spliced together to form a plurality of box body assemblies; and fixing the back surfaces of the box body assemblies on the supporting frame, so that the LED modules of different box body assemblies are spliced together to form the LED display screen, wherein in the step of forming the box body assemblies, the centers of the LED modules mounted on one box body assembly are offset relative to the center of the box body assembly.

Preferably, the LED housing includes: a mounting surface and a back surface facing each other and for fixing the LED module and the support frame, respectively; and a plurality of side surfaces adjoining the mounting and rear surfaces and collectively defining an outer shell of the LED box, wherein the plurality of side surfaces includes a first set of side surfaces and a second set of side surfaces, the first and second sets of side surfaces include first and second side surfaces adjacent to each other, respectively, the first set of side surfaces include a step, the step includes a side wall extending from the mounting surface toward the rear surface and a bottom surface extending from a bottom end of the side wall, and in the step of forming the plurality of box assemblies, the fourth set of side surfaces of the plurality of LED modules are aligned with a step edge of the corresponding LED box or are positioned above the bottom surface of the step.

Preferably, the support frame comprises: a plurality of transverse beams parallel to each other; and a plurality of longitudinal members parallel to each other, wherein top and bottom ends of the plurality of longitudinal members are fixed to the plurality of transverse beams, and in the step of fixing the rear surfaces of the plurality of case assemblies to the support frame, the rear surfaces of the LED cases are fixed to the plurality of longitudinal members.

According to the LED box body disclosed by the embodiment of the invention, the gaps among the LED modules are shielded by the steps on the side surfaces. Centers of a plurality of LED modules mounted on one case assembly are offset with respect to a center of the one case assembly such that positions of gaps between the LED modules correspond to positions of the steps. The LED box body can realize the standardized assembly of the LED display screen and improve the reliability and the durability of the LED display screen in severe environment. In a preferred embodiment, the step is adapted to receive at least some of the plurality of LED modules to maintain flatness when the surfaces of the plurality of LED modules are offset from each other.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 shows an assembly schematic of an LED box and an LED module according to the prior art.

Fig. 2 shows an assembly schematic of an LED box and an LED module according to an embodiment of the invention.

Fig. 3 is a perspective view of an LED display screen assembled by using the LED box and the LED modules shown in fig. 2.

Fig. 4 and 5 respectively show schematic diagrams of the principle that the LED box according to the embodiment of the present invention and the LED box of the comparative example block light transmission through the slit.

Fig. 6 and 7 are schematic views illustrating the principle of maintaining flatness of the LED housing according to the embodiment of the present invention and the LED housing of the comparative example, respectively.

Detailed Description

Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.

The present invention may be embodied in various forms, some examples of which are described below.

Fig. 1 shows an assembly schematic of an LED box and an LED module according to the prior art. The LED housing 110 includes a mounting surface 111, and a plurality of mounting positions, such as through holes, screw holes, or grooves, for coupling with a rigid member are provided on the mounting surface 111. The interior of the LED housing 110 may house various control circuitry and wiring. The LED module 120 includes a printed circuit board 121 and an LED array 122 of a plurality of LEDs mounted thereon. Further, the LED module 120 may further include a driving circuit mounted on the printed circuit board 121, and a housing for accommodating the printed circuit board 121 and the driving circuit thereon. A plurality of mounting locations, such as through holes, screw holes or recesses, for coupling with the solid member are provided on the printed circuit board 121.

The LED array 122 in the LED module 120 may comprise a plurality of LEDs, for example comprising 8 × 9=72 LEDs. A plurality of LED modules 120 may be mounted on the mounting surface 111 of one LED housing 110 to form a housing assembly 100. For example, the bin assembly 100 comprises 4 LED modules, thereby realizing 4 x 8 x 9=288 LEDs. The LED housing 110 and the LED module 120 are mounted at corresponding positions and fixed together by a fastener such as a screw. Mounting a plurality of LED modules 120 on one LED housing 110 may enlarge a display area and improve resolution, as compared to a single LED module 120.

The arrangement of the plurality of LED modules 120 mounted on the LED housing 110 may be various. In the example of fig. 1, 4 LED modules 120 make up a module array of 2*2, i.e., 2 LED modules 120 per row and two LED modules 120 per column. However, the arrangement of the 4 LED modules 120 may also be a module array consisting of 1*4 or 4*1.

After 4 LED modules 120 are mounted on the LED housing 110, the housing assembly 100 is formed. Since the 4 LED modules 120 are closely adjacent to each other, the length and width of the case assembly 100 correspond to the respective sizes of the plurality of LED modules, respectively. That is, the case assembly 100 has a length substantially equal to the sum of the lengths of the LED modules 120 arranged in the longitudinal direction and a width substantially equal to the sum of the widths of the LED modules 120 arranged in the width direction.

In the case assembly 100, the length and the width of the LED case 110 are respectively smaller than the corresponding dimensions of the case assembly 100, so as to facilitate further splicing the case assembly 100 into an LED display screen. A first set of sides of the plurality of LED modules 120 abut each other and a second set of sides are located outside the LED housing 110.

When the plurality of case assemblies 100 are further spliced into an LED display screen, the second set of sides of the plurality of LED modules 120 in different case assemblies 100 abut each other. However, in the design of splicing the LED box, due to manufacturing errors, a gap tolerance needs to be reserved for easy installation. Accordingly, a first gap is formed between the second group of side surfaces of the LED modules 120 adjacent to each other of the different case assemblies 100, and a second gap is formed between the side surfaces of the LED cases 110 adjacent to each other. The first gap corresponds to the second gap in position to form a direct opening, so that the back light can sequentially pass through the second gap and the first gap to reach the front. When the image is displayed, the light transmission of the gap influences the whole display effect.

The black insulating adhesive tape is pasted at the second gap on the back surface of the LED display screen, so that the problem of light transmission is solved, the use of the black insulating adhesive tape is increased, the appearance is not attractive, the standardized assembly is not facilitated, and the durability of the LED display screen is poor.

Fig. 2 shows an assembly schematic of an LED box and an LED module according to an embodiment of the invention. The LED housing 210 includes a mounting surface 211, and a plurality of mounting locations, such as through holes, screw holes, or grooves, for engaging with a solid member, are provided on the mounting surface 211. The interior of the LED housing 210 may house various control circuitry and wiring. The LED module 220 includes a printed circuit board 221 and an LED array 222 of a plurality of LEDs mounted thereon. Further, the LED module 220 may further include a driving circuit mounted on the printed circuit board 221, and a housing for accommodating the printed circuit board 221 and the driving circuit thereon. A plurality of mounting locations, such as through holes, screw holes, or grooves, for coupling with the solid member are provided on the printed circuit board 221.

The LED array 221 in the LED module 220 may comprise a plurality of LEDs, for example comprising 8 × 9=72 LEDs. On the mounting surface 211 of one LED housing 210, a plurality of LED modules 220 may be mounted, thereby forming a housing assembly 200. The fixing and arrangement of the plurality of LED modules 220 mounted on the LED housing 210 are the same as those of the conventional housing assembly shown in fig. 1, and will not be described in detail. Differences in the arrangement of the LED housing 210 and the LED module 220 according to an embodiment of the present invention will be described below.

The LED housing 210 is generally rectangular and includes 4 sides, adjoining the mounting and back sides and collectively defining an enclosure for the LED housing. The LED housing 210 includes a first set of sides and a second set of sides, respectively including a first side and a second side extending along a length direction and a width direction of the LED housing 210 and adjacent to each other. For example, in the example shown in fig. 2, the first set of sides in the LED housing 210 are left and lower sides with respect to the mounting surface 211, and the second set of sides includes right and top sides with respect to the mounting surface 211. As an alternative embodiment, the first set of sides in the LED housing 210 may be a right side and a lower side relative to the mounting surface 211, and the second set of sides includes a left side and a top side relative to the mounting surface 211. Steps 212 are formed on at least a first set of sides of the LED housing 210. In the example shown in fig. 2, the step 212 includes a side wall extending downward from the mounting surface 211 and a bottom surface extending laterally from a bottom end of the side wall. The width of the step 212, i.e., the width of the bottom surface, is dimension a or B, and the height of the step 212, i.e., the height of the sidewall, is dimension C. In the first set of sides, the width of the step 212 is dimension A and B, respectively. The dimensions a and B may be equal or different. In an alternative embodiment, the second set of sides of the LED housing 210 may also form the steps 212. The widths a and B of the step 212 may be determined according to the pitch of the LED housing 210, and are, for example, 1 mm to 10 mm, and preferably 1.5 mm. The height C of the step 212 is smaller than the thickness of the LED housing 210, for example, 0.2 mm to 5 mm, preferably 1 mm.

After the 4 LED modules 220 are mounted on the LED housing 210, the housing assembly 200 is formed. Since the 4 LED modules 220 are closely adjacent to each other, the length and width of the case assembly 200 correspond to the respective sizes of the plurality of LED modules, respectively. That is, the case assembly 200 has a length substantially equal to the sum of the lengths of the LED modules 220 arranged in the length direction and a width substantially equal to the sum of the widths of the LED modules 220 arranged in the width direction.

In the case assembly 200, the length and the width of the LED case 210 are respectively smaller than the corresponding dimensions of the case assembly 200, so as to facilitate further splicing the case assembly 200 into an LED display screen. When tiled into an LED display, a first set of sides of the plurality of LED modules 220 abut each other. Unlike the prior art case assembly shown in fig. 1, at the first set of sides in the LED case 210, the second set of sides of the LED module 220 is aligned with the step edge or above the bottom surface of the step. At a second set of sides in the LED box 210, a second set of sides of the LED module 220 is located outside the LED box 210. Thus, the plurality of LED modules 200 are not centered on the LED housing 210, but are offset in an upper right direction with respect to the LED housing 210 by a predetermined distance. In an alternative embodiment, the direction of the offset comprises one selected from up, down, left, right, left up, left down, right up, right down. In this application, the center of the LED box 210 is located at the center of the back of the LED box.

Fig. 3 is a perspective view of an LED display screen assembled by using the LED box and the LED modules shown in fig. 2. The LED display screen 300 includes a plurality of housing assemblies 200 spliced together. The housing assembly 200 includes one LED housing 210 and four LED modules 220, respectively. The LED display screen 300 further includes a support frame. The support frame comprises, for example, two transverse beams 240 parallel to each other and a plurality of longitudinal members 250 parallel to each other. The plurality of longitudinal members 250 are fixed at top and bottom ends to the cross beam 240.

The LED housing 210 includes a mounting surface and a rear surface opposite to each other. After assembling the LED box 210 and the LED module 220 into the box assembly 200, the box assembly 200 is further fixed to the longitudinal member 250 of the support frame. For example, fasteners may be used to secure the back of the LED housing 210 to the longitudinal member 250.

The fastener is, for example, a metal plate. In one embodiment, the plurality of LED housings 210 are interconnected using a longitudinal member by using one set of fasteners to secure the fasteners to the back of one LED housing 210 and then using another set of fasteners to further secure the fasteners to the longitudinal member 250. In another embodiment, one set of fasteners is used to secure the fasteners at adjacent side edges and adjacent corner locations of a plurality of LED bins 210 adjacent to each other, and then another set of fasteners is used to further secure the fasteners to the longitudinal member 250, thereby enabling interconnection of at least some of the LED bins 210 using the fasteners, and then interconnection of more LED bins 210 using the longitudinal member.

In the above-described assembling process, the LED modules 220 in the plurality of case assemblies 200 are closely adjacent to each other and located on the same plane by adjusting the mounting positions of the LED cases 210 on the longitudinal members 250. In the LED display screen 300, the second set of sides of the plurality of LED modules 220 in different housing assemblies 200 abut one another. Due to manufacturing tolerances, gap tolerances between the LED modules 220 need to be preserved for ease of installation. Accordingly, a first gap is formed between the second group of side surfaces of the LED modules 220 adjacent to each other of the different case assemblies 200, and a second gap is formed between the side surfaces of the LED cases 210 adjacent to each other.

Fig. 4 and 5 respectively show schematic diagrams of the principle that the LED box according to the embodiment of the present invention and the LED box of the comparative example block the light transmission through the slit.

In the embodiment of the present invention, the first slits between the LED modules 220 are located at the steps, and the positions of the second slits between the LED boxes 210 are horizontally staggered from each other. In the present application, the term "horizontal direction" means a direction substantially parallel to the display surface of the LED module. The back light is blocked by the back surface of the LED module 220 and the bottom surface and the sidewall of the step after entering the second slit, thereby making it difficult to pass through the first slit. Therefore, the LED box body according to the embodiment of the invention not only allows the gap tolerance to be reserved, but also utilizes the steps on the side surface of the LED box body to shield the gap between the LED modules, thereby realizing the standardized assembly of the LED display screen and improving the reliability and the durability of the LED display screen in severe environment.

In the comparative example, a first gap is formed between the second group of side surfaces of the LED modules 120 adjacent to each other of the different case assemblies 100, and a second gap is formed between the side surfaces of the LED cases 110 adjacent to each other. The first gap corresponds to the second gap in position to form a direct opening, so that the back light can sequentially pass through the second gap and the first gap to reach the front. The black insulating adhesive tape is pasted at the second gap on the back of the LED display screen, so that the problem of light transmission is solved, the use of the black insulating adhesive tape is increased, the attractiveness and the standardized assembly are not facilitated, and the durability of the LED display screen is poor due to the fact that the black insulating adhesive tape is easy to fall off.

In the embodiment of the present invention, the first gaps between the LED modules 220 are located at the steps, and the positions of the second gaps between the case assemblies 200 are staggered from each other in the horizontal direction. Due to manufacturing tolerances, flatness tolerances need to be reserved between the LED modules 220 to facilitate mounting. When the mounting surfaces of the adjacent case assemblies 200 are staggered from each other, a space for accommodating the LED modules 220 may be provided by the steps of the LED cases 210, so that the surfaces of the LED modules 220 on the adjacent case assemblies 200 may maintain a parallel state to each other although being staggered from each other, thereby maintaining flatness. In the present application, the term "horizontal direction" means a direction substantially parallel to the display surface of the LED module, and the "vertical direction" means a direction substantially perpendicular to the display surface of the LED module.

In the comparative example, the side of the LED housing 310 was not stepped. The LED module 320 is disposed offset with respect to the LED housing 310. When the LED display screen is assembled, first gaps between the LED modules 320 are located above the surface of the LED housing 310, and are horizontally staggered from second gaps between the LED housing 310. The light of the back surface is blocked by the back surface of the LED module 320 after entering the second slit, thereby making it difficult to pass through the first slit. This comparative example can solve the problem of light transmission. However, when the mounting surfaces of the adjacent case assemblies 300 are offset from each other, since no step of the LED case 310 provides a space for accommodating the LED module 320, the LED module 320 on the case assembly 300 is inclined with respect to the entire surface of the LED display screen, and thus flatness cannot be maintained.

In the comparative example, the flatness of the entire LED display screen can be maintained only by keeping the surfaces of the plurality of LED modules 320 flush when mounted. It is difficult to reserve flatness tolerance between the LED modules 320, thereby causing inconvenience in installation. Moreover, since the surface misalignment of the LED modules 320 is unavoidable, the display effect of the LED display screen is affected by the uneven surface.

While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The scope of the invention should be determined from the following claims.

Claims

1. An LED housing comprising:

a mounting surface and a back surface facing each other and respectively for fixing the plurality of LED modules and the support frame; and

a plurality of sides adjoining the mounting and back faces and collectively defining an enclosure for the LED enclosure,

wherein the plurality of sides includes a first set of sides and a second set of sides, the first and second sets of sides including first and second sides adjacent to each other, respectively,

the first set of sides including a step including a side wall extending from the mounting face to the back face and a bottom face extending from a bottom end of the side wall,

the plurality of LED modules comprise a third group of side surfaces and a fourth group of side surfaces, the third group of side surfaces are adjacent to each other, the LED modules on the adjacent LED boxes are adjacent to each other to form a first gap, the fourth group of side surfaces of the plurality of LED modules are aligned with the side wall of the step or are positioned above the bottom surface of the step, the LED boxes are adjacent to the adjacent LED boxes to form a second gap, and the first gap and the second gap are staggered from each other in the direction parallel to the surface direction of the plurality of LED modules.

2. The LED bin of claim 1, wherein the step has a height corresponding to the height of the side wall and a width corresponding to the width of the floor.

3. The LED case of claim 2, wherein the step has a height less than a thickness of the LED case.

4. The LED cabinet of claim 3, wherein the step has a height in the range of 0.2 mm to 5 mm.

5. The LED bin of claim 2, wherein the step has a width in the range of 1 mm to 10 mm.

6. The LED bin of claim 1, wherein the second set of sides includes a step including a side wall extending from the mounting surface to the back surface and a bottom surface extending from a bottom end of the side wall.

7. The LED cabinet of claim 1, wherein said first side of said second set of sides is a right side relative to said mounting surface, said second side of said second set of sides is a top side relative to said mounting surface, said first side of said first set of sides is a left side relative to said mounting surface, said second side of said first set of sides is a lower side relative to said mounting surface.

8. The LED housing of claim 1, wherein said first side of said first set of sides is a right side relative to said mounting surface, said second side of said first set of sides is a lower side relative to said mounting surface, said first side of said second set of sides is a left side relative to said mounting surface, and said second side of said second set of sides is a top side relative to said mounting surface.

9. An LED display screen comprising:

a support frame; and

a plurality of case assemblies mounted on the support frame,

wherein the box body components respectively comprise an LED box body and a plurality of LED modules arranged on the LED box body,

the plurality of LED modules of the plurality of box body assemblies are spliced together to form an integral display screen,

wherein the centers of the plurality of LED modules mounted on one case assembly are offset with respect to the center of the one case assembly, the LED modules in the case assembly abut the LED modules in an adjacent case assembly to form first gaps, the LED cases in the case assembly abut the LED cases in the adjacent assembly to form second gaps, the first gaps are offset from the second gaps in a direction parallel to the surface direction of the plurality of LED modules,

the LED box body comprises a mounting surface for fixing a plurality of LED modules, a back surface opposite to the mounting surface and a plurality of side surfaces,

the plurality of sides adjoining the mounting and rear faces and collectively defining an enclosure for the LED housing, the plurality of sides including a first set of sides and a second set of sides, the first and second sets of sides including first and second sides, respectively, adjacent to each other, the first set of sides including a step, the step including a side wall extending from the mounting face to the rear face and a bottom face extending from a bottom end of the side wall,

the plurality of LED modules mounted on the LED housing include a third set of side surfaces abutting each other and a fourth set of side surfaces abutting each other with the LED modules on an adjacent LED housing, the fourth set of side surfaces being aligned with the side walls of the steps of the LED housing or being located above the bottom surfaces of the steps.

10. The LED display screen of claim 9, wherein the back of the LED box is used to secure a support frame.

11. The LED display screen of claim 9, wherein the direction of offset comprises one selected from up, down, left, right, top left, bottom left, top right, and bottom right.

12. The LED display screen of claim 9, wherein the steps are configured to receive at least some of the plurality of LED modules to maintain flatness when the surfaces of the plurality of LED modules are misaligned with one another.

13. The LED display screen of claim 10, wherein the support frame comprises:

a plurality of transverse beams parallel to each other; and

a plurality of longitudinal members that are parallel to each other,

wherein the top and bottom ends of the plurality of longitudinal members are secured to the plurality of transverse beams,

the LED box body is fixed on the plurality of longitudinal members.

14. The LED display screen of claim 13, further comprising:

and the fasteners are used for fixing the LED box body on the longitudinal members.

15. The LED display screen of claim 14, wherein the plurality of fasteners are each secured to a back surface of a respective one of the LED housings.

16. The LED display screen of claim 14, wherein the plurality of fasteners are secured to adjacent sides and adjacent corner locations of adjacent LED boxes.

17. The LED display screen of claim 9, wherein the height of the step corresponds to the height of the side wall and the width of the step corresponds to the width of the bottom surface.

18. The LED display screen of claim 17, wherein the height of the step is less than the thickness of the LED housing.

19. The LED display screen of claim 18, wherein the step has a height in the range of 0.2 mm to 5 mm.

20. The LED display screen of claim 17, wherein the width of the step is in the range of 1 mm to 10 mm.

21. The LED display screen of claim 9, wherein the second set of sides comprises a step comprising a side wall extending from the mounting surface to the back surface and a bottom surface extending from a bottom end of the side wall.

22. The LED display screen of claim 9, wherein said first side of said second set of sides is a right side relative to said mounting surface, a second side of said second set of sides is a top side relative to said mounting surface, said first side of said first set of sides is a left side relative to said mounting surface, and said second side of said first set of sides is a lower side relative to said mounting surface.

23. The LED display screen of claim 9, wherein said first side of said first set of sides is a right side relative to said mounting surface, said second side of said first set of sides is a lower side relative to said mounting surface, said first side of said second set of sides is a left side relative to said mounting surface, said second side of said second set of sides is a top side relative to said mounting surface.

24. An assembling method of an LED display screen comprises the following steps:

fixing a plurality of LED modules on the installation surface of the LED box body, so that the LED modules are spliced together to form a plurality of box body assemblies; and

the back surfaces of the box body components are fixed on the supporting frame, so that a plurality of LED modules of different box body components are spliced together to form an LED display screen,

wherein, in the step of forming a plurality of case assemblies, centers of the plurality of LED modules mounted on one case assembly are offset with respect to the center of the one case assembly, the LED module in the case assembly abuts with the LED module in an adjacent case assembly to form a first slit, the LED case in the case assembly abuts with the LED case in the adjacent assembly to form a second slit, the first slit and the second slit are staggered with each other in a direction parallel to a surface direction of the plurality of LED modules,

the mounting face and the rear face of the LED housing are opposed to each other, a plurality of side faces of the LED housing are contiguous with the mounting face and the rear face and collectively define a housing of the LED housing, the plurality of side faces include a first group of side faces and a second group of side faces, the first group of side faces and the second group of side faces include first side faces and second side faces that are contiguous with each other, respectively, the first group of side faces include a step, the step includes a side wall extending from the mounting face toward the rear face and a bottom face extending from a bottom end of the side wall, the plurality of LED modules include a third group of side faces that are contiguous with each other inside a corresponding one of the housing assemblies and a fourth group of side faces that are contiguous with each other between two adjacent housing assemblies,

in the step of forming a plurality of case assemblies, the fourth set of sides of the plurality of LED modules are aligned with the step edges of the respective LED cases or are positioned above the bottom surfaces of the steps.

25. The assembly method of claim 24, wherein the support frame comprises:

a plurality of transverse beams parallel to each other; and a plurality of longitudinal members parallel to each other,

wherein the top and bottom ends of the plurality of longitudinal members are fixed to the plurality of transverse beams, and the back of the LED box is fixed to the plurality of longitudinal members in the step of fixing the back of the plurality of box assemblies to the support frame.