CN218273887U

CN218273887U - LED display device

Info

Publication number: CN218273887U
Application number: CN202222393139.XU
Authority: CN
Inventors: 李庆锋; 刘明; 孙雪超
Original assignee: Shenzhen Leyard Optoelectronic Co Ltd
Current assignee: Shenzhen Leyard Optoelectronic Co Ltd
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2023-01-10
Anticipated expiration: 2032-09-07

Abstract

The utility model provides a LED display device, include: the first LED display assembly comprises a first box body and a first lamp panel module arranged at the front part of the first box body; the second LED display assembly comprises a second box body and a second lamp panel module, wherein the second box body is spliced with the first box body, the second lamp panel module is installed at the front part of the second box body, and a splicing seam is reserved at the splicing part of the first box body and the second box body; the connection piece is located concatenation seam department, and the connection piece includes connection piece body and sets up the spacing portion in connection piece body one side, and the rear portion in first box is connected to a part of connection piece body, and the other part of connection piece body is connected in the rear portion of second box, and spacing portion stretches into to the concatenation seam in order to separate the rear portion of first box and the rear portion of second box, makes spacing portion respectively with first box and second box looks butt. The technical scheme of this application has solved LED display module among the correlation technique effectively and has spliced the problem that the lamp pearl of lamp plate module edge damaged easily.

Description

LED display device

Technical Field

The utility model relates to a LED shows technical field, particularly, relates to a LED display device.

Background

An LED display device is a flat panel display for displaying various information such as characters, images, video, and video signals. The LED display device comprises a plurality of LED display assemblies, each LED display assembly comprises a lamp panel module and a box body, the lamp panel modules are installed on the box bodies, and partial lamp beads of the lamp panel modules protrude out of the side surfaces of the box bodies.

When a plurality of LED display module splice, need carry out the counterpoint operation, the edge of lamp plate module can produce and collide with, damages the lamp pearl of lamp plate module edge easily.

SUMMERY OF THE UTILITY MODEL

A primary object of the utility model is to provide a LED display device to when solving the LED display module among the correlation technique and splicing, the problem of the lamp pearl easy damage of lamp plate module edge.

In order to achieve the above object, according to an aspect of the present invention, there is provided a LED display device including: the first LED display assembly comprises a first box body and a first lamp panel module arranged at the front part of the first box body; the second LED display assembly comprises a second box body and a second lamp panel module, the second box body is spliced with the first box body, the second lamp panel module is installed at the front part of the second box body, the front surface of the first lamp panel module and the front surface of the second lamp panel module jointly form an arc-shaped display surface, and a splicing seam is reserved at the splicing part of the first box body and the second box body; the connection piece is located concatenation seam department, and the connection piece includes connection piece body and sets up the spacing portion in connection piece body one side, and the rear portion in first box is connected to a part of connection piece body, and the other part of connection piece body is connected in the rear portion of second box, and spacing portion stretches into to the concatenation seam in order to separate the rear portion of first box and the rear portion of second box, makes spacing portion respectively with first box and second box looks butt.

Furthermore, the connecting piece body comprises a first segment and a second segment which form an obtuse included angle, the first segment is connected to the rear portion of the first box body, the second segment is connected to the rear portion of the second box body, and the limiting portion is arranged at an included angle between the first segment and the second segment.

Further, the connecting piece body further comprises a third segment connected to the included angle between the first segment and the second segment, one side of the third segment is connected to the side edge, facing the second segment, of the first segment, the other side of the third segment is connected to the side edge, facing the first segment, of the second segment, and the limiting portion is arranged on the front surface of the third segment.

Furthermore, the limiting part comprises a limiting lug, the left side face of the limiting lug is abutted against the rear part of the first box body, the right side face of the limiting lug is abutted against the rear part of the second box body, an included angle formed between the left side face of the limiting lug and the front surface of the first segment is in a range of 85 degrees to 95 degrees, and an included angle formed between the right side face of the limiting lug and the front surface of the second segment is in a range of 85 degrees to 95 degrees.

Furthermore, machining grooves are formed in the positions, located on the two sides of the limiting portion, of the front surface of the third segment.

Furthermore, the LED display device also comprises a first fastener, the connecting sheet body is provided with a connecting through hole and a connecting screw hole on the connecting part with the rear part of the first box body and the rear part of the second box body, the rear part of the first box body and the rear part of the second box body are provided with connecting matching holes corresponding to the connecting through hole or the connecting screw hole, the first fastener is arranged in the connecting through hole and the corresponding connecting matching hole or in the connecting screw hole and the corresponding connecting matching hole in a penetrating manner so as to fix the connecting sheet body on the rear part of the first box body and the rear part of the second box body, wherein the connecting matching hole is a matching through hole or a matching screw hole, and when the connecting matching hole is a matching through hole, the matching through hole corresponds to the connecting screw hole; when the connecting matching hole is a matching screw hole, the matching screw hole corresponds to the connecting through hole.

Furthermore, the first LED display assemblies and the second LED display assemblies are multiple, the multiple first LED display assemblies are sequentially spliced along a first direction, the multiple second LED display assemblies are sequentially spliced along the first direction, the multiple first LED display assemblies and the multiple second LED display assemblies are spliced along a second direction perpendicular to the first direction, the first LED display assemblies and the second LED display assemblies are in one-to-one correspondence along the second direction, one connecting piece is located at the joint of the two adjacent first LED display assemblies and the two adjacent second LED display assemblies, the LED display device further comprises a fixing frame located on the rear side of the first LED display assemblies, and the rear surfaces of the connecting pieces are fixed on the fixing frame.

Furthermore, the LED display device also comprises a plurality of fixing sheets and a plurality of second fasteners, the fixing sheets and the connecting sheets are arranged in a one-to-one correspondence mode, and each fixing sheet is connected with one corresponding connecting sheet through two second fasteners so as to clamp the corresponding fixing sheet and the corresponding connecting sheet on the fixing frame.

Furthermore, the connecting piece is provided with mounting screw holes at the parts connected with the rear part of the first box body and the rear part of the second box body, the fixing piece is provided with adjusting through holes corresponding to the mounting screw holes, and the second fastening piece is connected in the mounting screw holes and the corresponding adjusting through holes, wherein the adjusting through holes extend along the direction from one part of the connecting piece body to the other part of the connecting piece body.

Furthermore, the fixed frame comprises a vertical beam, the rear surface of the connecting sheet, which is contacted with the vertical beam, is a first plane, and the front surface of the fixing sheet, which is contacted with the vertical beam, is a second plane.

Use the technical scheme of the utility model, LED display device includes: the LED display device comprises a first LED display component, a second LED display component and a connecting sheet. First LED display module includes first box and installs at the anterior first lamp plate module of first box. The second LED display module comprises a second box body and a second lamp panel module, wherein the second box body is spliced with the first box body, and the second lamp panel module is installed at the front part of the second box body. The front surface of first lamp plate module and the front surface of second lamp plate module form the arc display surface jointly, and the concatenation department of first box and second box leaves the concatenation seam. The connecting sheet is positioned at the splicing seam. The connection piece includes connection piece body and sets up the spacing portion in connection piece body one side. One part of the connecting sheet body is connected to the rear part of the first box body, and the other part of the connecting sheet body is connected to the rear part of the second box body. The limiting part extends into the splicing seam to separate the rear part of the first box body from the rear part of the second box body, so that the limiting part is respectively abutted against the first box body and the second box body. When the first LED display component and the second LED display component are spliced to form an arc-shaped display surface, the rear part of a first box body of the first LED display component is abutted against the limiting part of the connecting sheet, and the rear part of the first box body is fixedly connected with the connecting sheet body of the connecting sheet; and then the rear part of a second box body of the second LED display component is abutted against the limiting part of the connecting sheet, and the rear part of the second box body is fixedly connected with the connecting sheet body of the connecting sheet. Therefore, when the first LED display assembly and the second LED display assembly are spliced, the first LED display assembly is fixed on the connecting piece, and then the second LED display assembly and the first LED display assembly are aligned. When carrying out the counterpoint operation, because spacing portion stretches into in order to separate the rear portion of first box and the rear portion of second box in the concatenation seam, make spacing portion respectively with first box and second box looks butt, collision between first box and the second box has been reduced, extrusion force when also having reduced simultaneously and splicing between first lamp plate module and the second lamp plate module, make most mutual extrusion force between first LED display module and the second LED display module have shifted spacing portion, be difficult to bump and take place the extrusion between first lamp plate module and the second lamp plate module. Avoided like the counterpoint operation among the correlation technique, because partial lamp pearl protrusion in the side surface of box, lead to the partial lamp pearl of protrusion in the side surface of box to contact earlier and cause and collide with for the lamp pearl of lamp plate module edge is damaged easily. Consequently, the technical scheme of this application when having solved the LED display module among the correlation technique effectively and splicing, the problem of the lamp pearl of lamp plate module edge damaged easily.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic perspective view of an embodiment of an LED display device according to the present invention;

FIG. 2 shows a schematic enlarged view of a portion of the LED display device of FIG. 1 at A;

FIG. 3 shows a schematic front view of the LED display device of FIG. 1;

FIG. 4 shows a schematic top view of the LED display device of FIG. 1;

FIG. 5 shows a schematic view of a portion of the LED display device of FIG. 4 at B;

FIG. 6 shows a schematic side view of a connection pad of the LED display device of FIG. 1;

FIG. 7 is a perspective view of a connection pad of the LED display device of FIG. 1;

fig. 8 is a perspective view of another view of the connection pad of the LED display device of fig. 1.

Wherein the figures include the following reference numerals:

10. a first LED display assembly; 11. a first case; 12. a first lamp panel module;

20. a second LED display assembly; 21. a second case; 22. a second lamp panel module; 23. splicing seams;

30. connecting sheets; 31. a connecting sheet body; 311. a first segment; 312. a second fragment; 313. a third segment; 32. a limiting bump; 33. processing a groove; 34. a connecting through hole; 35. a connecting screw hole; 36. mounting a screw hole;

40. a fixed mount;

50. a fixing sheet; 51. adjusting the through hole; 52. a second fastener;

c1, forming an included angle between the left side surface of the limiting bump and the front surface of the first segment;

c2, forming an included angle between the right side surface of the limiting bump and the front surface of the second segment.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 6, the LED display device of the present embodiment includes: a first LED display assembly 10, a second LED display assembly 20, and a connecting tab 30. The first LED display assembly 10 includes a first box 11 and a first lamp panel module 12 installed in the front of the first box 11. The second LED display assembly 20 includes a second box 21 spliced with the first box 11 and a second lamp panel module 22 installed at the front part of the second box 21. The front surface of first lamp plate module 12 and the front surface of second lamp plate module 22 form the arc display surface jointly, and splice seam 23 is left with the concatenation department of second box 21 to first box 11. The connecting piece 30 is located at the splice seam 23. The connecting sheet 30 includes a connecting sheet body 31 and a stopper provided on one side of the connecting sheet body 31. A part of the connecting piece body 31 is connected to the rear of the first case 11, and the other part of the connecting piece body 31 is connected to the rear of the second case 21. The limiting part extends into the splicing seam 23 to separate the rear part of the first box body 11 from the rear part of the second box body 21, so that the limiting part is respectively abutted against the first box body 11 and the second box body 21.

By applying the technical scheme of the embodiment, when the first LED display module 10 and the second LED display module 20 are spliced to form an arc-shaped display surface, the rear part of the first box body 11 of the first LED display module 10 is abutted against the limiting part of the connecting sheet 30, and the rear part of the first box body 11 is fixedly connected with the connecting sheet body 31 of the connecting sheet 30; then, the rear part of the second box 21 of the second LED display module 20 abuts against the limiting part of the connecting sheet 30, and the rear part of the second box 21 is fixedly connected with the connecting sheet body 31 of the connecting sheet 30. Thus, when the first LED display module 10 and the second LED display module 20 are spliced, the first LED display module 10 is fixed on the connecting sheet 30, and then the second LED display module 20 and the first LED display module 10 are aligned. When carrying out the counterpoint operation, because spacing portion stretches into in order to separate the rear portion of first box 11 and the rear portion of second box 21 in the concatenation seam 23, make spacing portion respectively with first box 11 and second box 21 looks butt, the clash and knock between first box 11 and the second box 21 has been reduced, extrusion force when also having reduced simultaneously and splicing between first lamp plate module 12 and the second lamp plate module 22, make most mutual extrusion force between first LED display module 10 and the second LED display module 20 have shifted to spacing portion, be difficult to bump and take place the extrusion between first lamp plate module 12 and the second lamp plate module 22. Avoided like the counterpoint operation among the correlation technique, because partial lamp pearl protrusion in the side surface of box, lead to the partial lamp pearl of protrusion in the side surface of box to contact earlier and cause and collide with for the lamp pearl of lamp plate module edge is damaged easily. Therefore, the technical scheme of this embodiment has solved LED display module among the correlation technique effectively when splicing, the problem of the lamp pearl easy damage of lamp plate module edge.

It should be noted that, the arc surface defined by the above-mentioned arc display surface mathematics can be the arc display surface formed by splicing the front surface of the first lamp panel module 12 and the front surface of the second lamp panel module 22 which are sequentially angled along the circumferential direction, and also can be the arc display surface formed by the flexible LED display screen for both the first lamp panel module 12 and the second lamp panel module 22.

As shown in fig. 1 to 8, when the LED display module needs to be spliced to form an arc-shaped screen, a certain angle is formed between the box body of the LED display module and the box body according to the radian of the arc-shaped screen. The connecting piece body 31 comprises a first segment 311 and a second segment 312 which are arranged at an obtuse included angle, the first segment 311 is connected to the rear portion of the first box body 11, and the second segment 312 is connected to the rear portion of the second box body 21, so that the first box body 11 and the second box body 21 are arranged at an angle, and the integral flatness of the appearance of the arc-shaped screen formed by splicing is improved. The limiting part is arranged at the included angle between the first segment 311 and the second segment 312, so that the stress of the connecting sheet 30 is more uniform, and the connection is more reliable.

As shown in fig. 1 to 8, the connecting piece body 31 further includes a third segment 313 connected to a corner between the first segment 311 and the second segment 312, one side of the third segment 313 is connected to a side of the first segment 311 facing the second segment 312, the other side of the third segment 313 is connected to a side of the second segment 312 facing the first segment 311, and the limiting portion is disposed on a front surface of the third segment 313. The arrangement of the plurality of segments further improves the overall flatness of the appearance of the arc-shaped screen formed by splicing.

As shown in fig. 4 to 8, the limiting portion includes a limiting bump 32, the left side surface of the limiting bump 32 is abutted against the rear portion of the first box 11, and the right side surface of the limiting bump 32 is abutted against the rear portion of the second box 21, so that mutual extrusion force of the first LED display assembly 10 and the second LED display assembly 20 during splicing alignment operation is transferred to the limiting bump 32, and mutual extrusion force between the first lamp panel module 12 and the second lamp panel module 22 is greatly reduced. The width of the limiting bump 32 is calculated according to the radian of the arc-shaped screen formed by splicing the LED display components and the height of the box body, so that the first lamp panel module 12 and the second lamp panel module 22 are not contacted with or bear a small extrusion force, and the condition that the lamp beads are damaged due to collision of the first lamp panel module 12 and the second lamp panel module 22 during splicing alignment operation of the first LED display component 10 and the second LED display component 20 in the prior art is avoided.

In this embodiment, first lamp panel module 12 and second lamp panel module 22 all include lamp panel and array and arrange a plurality of lamp pearls on the lamp panel.

An included angle c1 formed between the left side surface of the limiting convex block 32 and the front surface of the first segment 311 is in a range of 85 degrees to 95 degrees, and the included angle c1 is preferably 85 degrees, 87 degrees, 91 degrees, 90 degrees, 92 degrees, 93 degrees or 95 degrees. An included angle c2 formed between the right side surface of the restriction protrusion 32 and the front surface of the second segment 312 is in a range of 85 ° to 95 °, and the included angle c2 is preferably 85 °, 87 °, 91 °, 90 °, 92 °, 93 °, or 95 °.

In the present embodiment, since the rear portion of the first casing 11 of the first LED display assembly 10 and the rear portion of the second casing 21 of the second LED display assembly 20 are both 90 °, the included angle formed between the left side surface of the limiting protrusion 32 and the front surface of the first segment 311 is also 90 ° correspondingly, and the included angle formed between the right side surface of the limiting protrusion 32 and the front surface of the second segment 312 is also 90 °. Like this, can make the butt of the left surface of the rear portion of first box 11 of first LED display module 10 and spacing lug 32 more firm, also make the butt of the right surface of the rear portion of the second box 21 of second LED display module 20 and spacing lug 32 more firm, and then make the fixed of connection piece 30 and first LED display module 10, second LED display module 20 more firm reliable.

As shown in fig. 2 to 8, the front surface of the third segment 313 is provided with processing grooves 33 at positions on both sides of the limiting portion, and the processing of the limiting protrusion 32 is facilitated by the processing grooves 33, so that the processing requirements are reduced. Moreover, the processing groove 33 is arranged adjacent to two sides of the limiting part, so that when the rear part of the first box body 11 of the first LED display assembly 10 abuts against the left side surface of the limiting bump 32, the processing groove 33 can avoid the corner of the rear part of the first box body 11, so that the abutment is more stable; when the rear portion of the second box 21 of the second LED display module 20 abuts against the right side surface of the limiting protrusion 32, the processing groove 33 can avoid the corner of the rear portion of the second box 21, so that the abutment is more stable.

As shown in fig. 1 to 8, the LED display device further includes a first fastener, and a connection through hole 34 and a connection screw hole 35 are provided on a portion of the connection sheet body 31 connected to the rear portion of the first case 11 and the rear portion of the second case 21. The rear part of the first box body 11 and the rear part of the second box body 21 are provided with connecting matching holes corresponding to the connecting through holes 34 or the connecting screw holes 35. The first fastening member is inserted through the connection through hole 34 and the corresponding connection fitting hole or inserted through the connection screw hole 35 and the corresponding connection fitting hole to fix the connection piece body 31 to the rear portion of the first case 11 and the rear portion of the second case 21. Wherein, the connection matching hole is a matching through hole or a matching screw hole, and when the connection matching hole is a matching through hole, the matching through hole corresponds to the connection screw hole 35; when the connection fitting holes are fitting screw holes, the fitting screw holes correspond to the connection through holes 34. Thus, the connecting piece 30 provides different connecting holes for the LED display device to provide different connecting modes. When the connecting matching holes are matching through holes, the matching through holes correspond to the connecting screw holes 35, the first fastening pieces penetrate through the matching through holes and the connecting screw holes 35 of the connecting piece body 31 so as to fix the connecting piece 30 on the box body of the LED display device, and the first fastening pieces are preferably bolts. When the connecting matching holes are matching screw holes, the matching screw holes correspond to the connecting through holes 34, the first fastening pieces penetrate through the matching screw holes and the connecting through holes 34 of the connecting piece body 31 so as to fix the connecting piece 30 on the box body of the LED display device, and the first fastening pieces are preferably bolts or screws.

In the present embodiment, the connecting sheet 30 is provided with two connecting through holes 34 and two connecting screw holes 35.

As shown in fig. 1 to 5, each of the first LED display assembly 10 and the second LED display assembly 20 is plural. The plurality of first LED display components 10 are sequentially spliced along a first direction, the plurality of second LED display components 20 are sequentially spliced along the first direction, and the plurality of first LED display components 10 and the plurality of second LED display components 20 are spliced along a second direction perpendicular to the first direction. And each first LED display assembly 10 corresponds to each second LED display assembly 20 along the second direction. Wherein, one connecting sheet 30 is located at the joint of two adjacent first LED display assemblies 10 and two adjacent second LED display assemblies 20. The LED display device further includes a fixing frame 40 positioned at a rear side of the first LED display assembly 10, and rear surfaces of the plurality of connection pads 30 are fixed to the fixing frame 40.

In this embodiment, one connecting piece 30 connects four LED display modules. The LED display device further includes a fixing frame 40 positioned at a rear side of the first LED display assembly 10, and rear surfaces of the plurality of connection pads 30 are fixed to the fixing frame 40. After the plurality of LED display components are spliced, the spliced LED display components are fixed by the fixing frame 40, so that the possibility of toppling of the spliced LED display components is reduced. In this embodiment, the first direction is a left-right direction, and the second direction is an up-down direction. In an embodiment not shown in the figures, the first direction is an up-down direction and the second direction is a left-right direction.

As shown in fig. 1 to 8, the LED display device further includes a plurality of fixing pieces 50 and a plurality of second fastening members 52, the plurality of fixing pieces 50 are disposed in one-to-one correspondence with the plurality of connecting pieces 30, and each fixing piece 50 is connected to a corresponding one of the connecting pieces 30 by two second fastening members 52, so as to clamp the corresponding fixing piece 50 and the corresponding connecting piece 30 on the fixing frame 40. Because the connecting sheet 30 is fixed on a plurality of LED display assemblies, the fixing frame 40 is clamped between the connecting sheet 30 and the corresponding fixing sheet 50, and the second fastening member 52 is fastened, so as to fix the LED display assemblies fixedly connected with the connecting sheet 30 on the fixing frame 40, thereby reducing the possibility that the spliced LED display assemblies topple over. The second fastener 52 is preferably a threaded rod.

As shown in fig. 1 to 8, mounting screw holes 36 are further formed in portions of the connecting sheet 30 connected to the rear portion of the first case 11 and the rear portion of the second case 21, adjusting through holes 51 corresponding to the mounting screw holes 36 are formed in the fixing sheet 50, and second fastening members 52 are connected to the mounting screw holes 36 and the corresponding adjusting through holes 51. The provision of the mounting screw holes 36 and the adjustment through holes 51 facilitates the use of the second fastening members 52. Wherein the adjustment through hole 51 extends in a direction from one portion of the connection piece body 31 to another portion of the connection piece body 31. Thus, the adjustment through-holes 51 of the fixing piece 50 can be applied to more connecting pieces 30, and the fixing piece 50 can be applied when the distance between two mounting screw holes 36 of different connecting pieces 30 is different.

In this embodiment, the connecting plate 30 is provided with two mounting screw holes 36, and the mounting screw holes 36 are screw holes. The adjusting through-hole 51 of the fixing plate 50 is a bar-shaped through-hole.

As shown in fig. 1 to 5, the fixing frame 40 includes a vertical beam, a rear surface of the connecting piece 30 contacting the vertical beam is a first plane, and a front surface of the fixing piece 50 contacting the vertical beam is a second plane. Because the contact surface is a plane, the contact area between the connecting sheet 30 and the vertical beam and the contact area between the fixing sheet 50 and the vertical beam are larger, so that a larger force can be applied when the fixing frame 40 is clamped by the fixing sheet 50 and the connecting sheet 30, and the LED display assembly fixedly connected with the connecting sheet 30 is more stably fixed on the fixing frame 40.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the directional terms such as "front, back, upper, lower, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, and in the case of not making a contrary explanation, these directional terms do not indicate and imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore, should not be construed as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An LED display device, comprising:

the first LED display assembly (10) comprises a first box body (11) and a first lamp panel module (12) arranged at the front part of the first box body (11);

the second LED display assembly (20) comprises a second box body (21) and a second lamp panel module (22), wherein the second box body (21) is spliced with the first box body (11), the second lamp panel module (22) is installed at the front part of the second box body (21), the front surface of the first lamp panel module (12) and the front surface of the second lamp panel module (22) jointly form an arc-shaped display surface, and a splicing seam (23) is reserved at the splicing position of the first box body (11) and the second box body (21);

the connecting piece (30) is located at the splicing seam (23), the connecting piece (30) comprises a connecting piece body (31) and a limiting portion arranged on one side of the connecting piece body (31), one portion of the connecting piece body (31) is connected to the rear portion of the first box body (11), the other portion of the connecting piece body (31) is connected to the rear portion of the second box body (21), and the limiting portion extends into the splicing seam (23) to separate the rear portion of the first box body (11) from the rear portion of the second box body (21), so that the limiting portion is respectively abutted to the first box body (11) and the second box body (21).

2. The LED display device according to claim 1, wherein the connecting piece body (31) comprises a first segment (311) and a second segment (312) which are arranged at an obtuse included angle, the first segment (311) is connected to the rear part of the first box body (11), the second segment (312) is connected to the rear part of the second box body (21), and the limiting part is arranged at the included angle between the first segment (311) and the second segment (312).

3. The LED display device according to claim 2, wherein the connecting piece body (31) further comprises a third segment (313) connected to a corner between the first segment (311) and the second segment (312), one side of the third segment (313) is connected to a side of the first segment (311) facing the second segment (312), the other side of the third segment (313) is connected to a side of the second segment (312) facing the first segment (311), and the limiting part is arranged on a front surface of the third segment (313).

4. The LED display device according to claim 3, wherein the limiting portion comprises a limiting bump (32), a left side surface of the limiting bump (32) abuts against a rear portion of the first case (11), a right side surface of the limiting bump (32) abuts against a rear portion of the second case (21), an included angle (c 1) formed between the left side surface of the limiting bump (32) and a front surface of the first segment (311) is in a range of 85 ° to 95 °, and an included angle (c 2) formed between the right side surface of the limiting bump (32) and a front surface of the second segment (312) is in a range of 85 ° to 95 °.

5. The LED display device according to claim 3, wherein the front surface of the third segment (313) is provided with machining grooves (33) at positions on both sides of the stopper portion.

6. The LED display device according to any one of claims 1 to 5,

the LED display device further comprises a first fastener, a connecting through hole (34) and a connecting screw hole (35) are formed in the connecting part (31) connected with the rear part of the first box body (11) and the rear part of the second box body (21), connecting matching holes corresponding to the connecting through hole (34) or the connecting screw hole (35) are formed in the rear part of the first box body (11) and the rear part of the second box body (21), the first fastener penetrates through the connecting through hole (34) and the corresponding connecting matching hole or penetrates through the connecting screw hole (35) and the corresponding connecting matching hole, so that the connecting piece body (31) is fixed to the rear part of the first box body (11) and the rear part of the second box body (21),

the connecting matching hole is a matching through hole or a matching screw hole, and when the connecting matching hole is the matching through hole, the matching through hole corresponds to the connecting screw hole (35); when the connection matching hole is the matching screw hole, the matching screw hole corresponds to the connection through hole (34).

7. The LED display device according to any one of claims 1 to 5, wherein the first LED display assemblies (10) and the second LED display assemblies (20) are multiple, the first LED display assemblies (10) are sequentially spliced along a first direction, the second LED display assemblies (20) are sequentially spliced along the first direction, the first LED display assemblies (10) and the second LED display assemblies (20) are sequentially spliced along a second direction perpendicular to the first direction, and each first LED display assembly (10) and each second LED display assembly (20) are in one-to-one correspondence along the second direction, wherein one connecting piece (30) is located at a joint position where two adjacent first LED display assemblies (10) and two adjacent second LED display assemblies (20) are common, the LED display device further comprises a fixing frame (40) located at a rear side of the first LED display assemblies (10), and rear surfaces of the connecting pieces (30) are fixed to the fixing frame (40).

8. The LED display device according to claim 7, further comprising a plurality of fixing pieces (50) and a plurality of second fastening members (52), wherein the plurality of fixing pieces (50) are arranged in one-to-one correspondence with the plurality of connecting pieces (30), and each fixing piece (50) is connected with a corresponding one of the connecting pieces (30) through two second fastening members (52) so as to clamp the corresponding fixing piece (50) and the corresponding connecting piece (30) on the fixing frame (40).

9. The LED display device according to claim 8, wherein the connecting sheet (30) is further provided with mounting screw holes (36) at portions connected with the rear portion of the first case (11) and the rear portion of the second case (21), the fixing sheet (50) is provided with adjusting through holes (51) corresponding to the mounting screw holes (36), and the second fastening members (52) are connected to the mounting screw holes (36) and the corresponding adjusting through holes (51), wherein the adjusting through holes (51) extend along a direction from one portion of the connecting sheet body (31) to the other portion of the connecting sheet body (31).

10. The LED display device of claim 8, wherein the fixing frame (40) comprises a vertical beam, a rear surface of the connecting piece (30) contacting the vertical beam is a first plane, and a front surface of the fixing piece (50) contacting the vertical beam is a second plane.