Display module and tiled display device

Abstract

Embodiments of the present disclosure provide a display module and a tiled display device. The display module comprises a display panel and a bearing part for bearing the display panel; the display panel comprises a first substrate; the bearing part comprises a bearing part body and a protection part which are connected to each other; at least part of the protection part surrounds the side surface of the first substrate.

Description

Display modules and spliced ​​display devices Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display module and a spliced ​​display device. Background Art

[0002] In related technologies, a protective layer can be applied or adhered to the sides of a glass substrate to provide protection. However, the protective layer is relatively thin, especially at the chamfered corner where the display / non-display surface and the side of the glass substrate meet, where the thickness can be less than 1 μm. This results in a limited protective effect on the glass substrate. This layer cannot significantly improve the risk of glass substrate damage, and also has poor resistance to electrostatic discharge (ESD).

[0003] Summary of the Invention

[0004] Embodiments of the present disclosure provide a display module and a spliced ​​display device.

[0005] In a first aspect, an embodiment of the present disclosure provides a display module, comprising a display panel and a carrying portion for carrying the display panel, wherein the display panel comprises a first substrate,

[0006] The carrying portion includes a carrying portion body and a protective portion that are connected to each other, and at least a portion of the protective portion is disposed around a side surface of the first substrate.

[0007] In some embodiments, the display panel further includes a functional layer, the functional layer is located on a side of the first substrate away from the carrying portion, and an orthographic projection of the first substrate on the functional layer is located in an area where the functional layer is located;

[0008] The protection portion is located between the functional layer and the supporting portion body, and at least a portion of the protection portion is in direct contact with the functional layer.

[0009] In some embodiments, the guard portion includes a first sub-portion, the first sub-portion including a first side and a second side disposed opposite to each other, and a third side and a fourth side disposed opposite to each other;

[0010] The first side is in direct contact with the functional layer, the second side is in direct contact with the carrier body, and the third side is in direct contact with the side surface of the first substrate.

[0011] In some embodiments, the first sub-part is adhered to at least one of the functional layer, the carrier body, and the side surface of the first substrate;

[0012] The first sub-portion is conformal to the functional layer at a position in direct contact, the first sub-portion is conformal to the carrier body at a position in direct contact, and the first sub-portion is conformal to the side surface of the first substrate at a position in direct contact.

[0013] In some embodiments, an average thickness of the first sub-portion at a side perpendicular to the first substrate is in a range of 20 μm to 200 μm.

[0014] In some embodiments, the display module includes a connecting portion, and two opposite sides of the connecting portion are respectively connected to the first substrate and the supporting body;

[0015] The protection portion further includes a second sub-portion, the second sub-portion is located on a side of the first sub-portion close to the first substrate, and the second sub-portion includes a fifth side, and a sixth side and a seventh side that are oppositely arranged;

[0016] The fifth side is located on a side of the second sub-section away from the first sub-section and is adjacent to or in contact with the connecting portion;

[0017] The sixth side is in direct contact with the first substrate, and the seventh side is in direct contact with the carrier body; the second sub-portion is conformal to the carrier body at a position in direct contact, and the second sub-portion is conformal to the first substrate at a position in direct contact;

[0018] The first sub-section and the second sub-section are an integrated structure.

[0019] In some embodiments, a distance between a side of the connecting portion close to an edge of the first substrate and an edge of the first substrate on the same side thereof in a direction perpendicular to the thickness of the first substrate is no more than 3 mm.

[0020] In some embodiments, a distance inwardly extending from an orthographic projection edge of the first substrate on the functional layer to an edge of the functional layer is in a range of 20 μm to 200 μm.

[0021] The outer side surface of the protection portion is flush with the outer side surface of the supporting portion body on the same side.

[0022] In some embodiments, the outer side surface of the protective portion is flush with the outer side surface of the supporting portion body and the outer side surface of the functional layer.

[0023] In some embodiments, at least a portion of the protective portion extends beyond the area where the functional layer is located;

[0024] The bearing portion further includes a filling portion, the filling portion being located on a side of the portion of the protective portion that exceeds the area where the functional layer is located and is away from the bearing portion body;

[0025] The filling portion includes an eighth side and a ninth side, the eighth side being flush with the outer side surface of the protective portion and the outer side surface of the supporting portion body on the same side; the ninth side being in direct contact with the outer side surface of the functional layer, and the filling portion and the functional layer being conformal at the position of direct contact;

[0026] The filling portion and the protection portion are an integrated structure.

[0027] In some embodiments, the material of the protective portion includes any one of: a resin material, an optical adhesive material, a thermosetting adhesive material, and a hot melt adhesive material.

[0028] In some embodiments, the average thickness of the protective portion on a side perpendicular to the first substrate is in the range of 1.42 mm to 1.9 mm;

[0029] The protection portion and the bearing portion body are an integrated structure.

[0030] In some embodiments, the display module includes a connecting portion, and opposite sides of the connecting portion are respectively connected to the first substrate and the supporting body;

[0031] The bearing portion body includes a groove, the orthographic projection of the connecting portion on the bearing portion is located within the orthographic projection of the groove on the bearing portion; and the connecting portion is at least partially located in the groove.

[0032] In some embodiments, the first substrate includes a display surface and a non-display surface that are opposite to each other, and a side surface of the first substrate is located between the display surface and the non-display surface.

[0033] The first substrate further includes a flexible circuit board, the flexible circuit board being connected to the connection terminals on the display surface and being bent to the non-display surface via the side surface;

[0034] At least a portion of the protection portion is located on a side of the flexible circuit board away from the side surface, and is in contact with a portion of the flexible circuit board located on the side surface.

[0035] In some embodiments, the first substrate is an LED light-emitting substrate; and the functional layer includes a black film.

[0036] In some embodiments, the first substrate is an array substrate, the functional layer is a color filter substrate, and the display module further includes a liquid crystal layer located between the array substrate and the color filter substrate.

[0037] In a second aspect, an embodiment of the present disclosure provides a spliced ​​display device including a housing and a plurality of display modules located on the housing, wherein the display modules are the display modules described in the first aspect.

[0038] In some embodiments, the supporting body has a top surface facing the display panel, a bottom surface facing away from the display panel, and a plurality of side surfaces between the top surface and the bottom surface.

[0039] The plurality of side surfaces include at least one first side surface, the first side surface is a concave-convex surface, and the first side surface has a plurality of protrusions and a plurality of recesses, and the protrusions and the recesses are alternately arranged in an extension direction of a connecting line between the bottom surface and the first side surface;

[0040] The edge of the display panel's positive projection on the plane where the supporting body is located is the first edge, the edge of the protruding side of the protruding portion is the second edge, and the edge of the concave side of the concave portion is the third edge. The second edge and the third edge are respectively located on both sides of the first edge.

[0041] In some embodiments, at any point of the first side surface, an extension line in the thickness direction of the carrier body passes through only one of the protruding portions or only one of the recessed portions.

[0042] In some embodiments, the spliced ​​display device includes two first side surfaces respectively belonging to the two display modules and arranged opposite to each other;

[0043] The protruding portion on one of the first side surfaces is arranged opposite to the recessed portion on the other first side surface, and a gap is provided between the protruding portion and the recessed portion that are arranged opposite to each other.

[0044] In some embodiments, the distance between the second edge and the third edge is between 0.4 mm and 0.6 mm.

[0045] In some embodiments, the second edge and the third edge are equidistant from the first edge.

[0046] In some embodiments, the orthographic projection of the protrusion and / or the recess on the plane where the bottom surface is located is a trapezoid.

[0047] In some embodiments, the distance between two adjacent carrying body parts is smaller than the distance between the display panels respectively carried by the two carrying body parts, wherein the distance between the two carrying body parts is: the distance between the second edges of the two corresponding carrying body parts.

[0048] In some embodiments, a distance between the second edge of the protrusion and the third edge of the recessed portion opposite to the protrusion in an adjacent display module is 70 μm-100 μm.

[0049] In some embodiments, when the temperature is 25° C. and the pixel pitch of the display panel is 0.8 mm-1.5 mm, the distance between the edges of two adjacent display panels is between 100 μm and 200 μm. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0051] FIG1 is a schematic structural diagram of a display module provided by an embodiment of the present disclosure.

[0052] FIG2 is a planar structural diagram of the back side of a display module provided by an embodiment of the present disclosure.

[0053] FIG3 is a schematic diagram of a preparation process of forming the protective portion 12 by 3D according to an embodiment of the present disclosure.

[0054] FIG4A is a schematic structural diagram of another display module provided by an embodiment of the present disclosure.

[0055] FIG4B is a schematic structural diagram of another display module provided by an embodiment of the present disclosure.

[0056] FIG5 is a schematic structural diagram of a carrier body provided in an embodiment of the present disclosure.

[0057] FIG6 is a schematic structural diagram of a plurality of supporting body parts in a spliced ​​state provided by an embodiment of the present disclosure.

[0058] FIG7 is a schematic structural diagram of a spliced ​​display device provided in an embodiment of the present disclosure.

[0059] FIG8 is a schematic diagram of an orthographic projection of a display module on a reference surface according to an embodiment of the present disclosure.

[0060] FIG9 is an enlarged view of the W region in FIG8 .

[0061] Explanation of the accompanying drawings: Display module: display panel PNL, connecting part 4, carrying part 1; Display panel PNL: first substrate 2: flexible circuit board 21, circuit structure 210, side 2a of the first substrate; Functional layer 3: black film 31, adhesive layer 32; Carrying part 1: carrying part body 11: groove 110; Protective part 12: first sub-part 121, second sub-part 122, filling part 123; First side 111 of the carrying part body; First side a1, second side a2, third side a3, fourth side a4, fifth side a5, sixth side a6, seventh side a7, eighth side a8, ninth side a9; Protrusion 11a, recessed part 11b, first edge L1, second edge L2, third edge L3. DETAILED DESCRIPTION

[0062] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0063] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0064] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should have the usual meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0065] With the rapid development of display technology, spliced ​​display devices have been increasingly used in large venues such as shopping malls, cinemas, and stadiums. They not only solve the technical problems of high cost and difficult maintenance of single large screens, but also have extremely high scalability and can be used to display images of various sizes.

[0066] The aforementioned spliced ​​display device includes multiple display modules and a housing for supporting the modules. The display modules may include display panels and a support portion for the display panels. The display panels in the spliced ​​display device include glass substrates made of glass material, which offer high brightness, low power consumption, and excellent display quality. However, due to the inherent material properties of glass substrates, they are less strong and less ductile than flexible substrates, making them susceptible to damage during the splicing process.

[0067] In related technologies, a protective layer can be applied or adhered to the sides of a glass substrate to provide protection. However, the protective layer is relatively thin, especially at the chamfered corner where the display / non-display surface and the side of the glass substrate meet, where the thickness can be less than 1 μm. This results in a limited protective effect on the glass substrate. This layer cannot significantly improve the risk of glass substrate damage, and also has poor resistance to electrostatic discharge (ESD).

[0068] Furthermore, in related art, due to the structural characteristics of COG products, the carrier portion is slightly larger than the display panel. However, due to pixel pitch limitations, the carrier portion's extension beyond the display panel is limited. Therefore, even with the carrier portion, collision damage to the supported display panel is unavoidable, resulting in poor protection for the display panel. Furthermore, the heat generated by the display panel during operation causes thermal expansion of the carrier portion, resulting in display seams between adjacent display modules and affecting the display quality of the tiled display device.

[0069] In order to solve at least one of the above technical problems, the embodiments of the present disclosure provide a display module for enhancing the protection effect of the display module to avoid damage such as squeezing and bumping of the display module and to increase the service life of the product.

[0070] Figure 1 is a structural schematic diagram of a display module provided by an embodiment of the present disclosure. As shown in Figure 1, the display module includes a display panel PNL and a carrying portion 1 that carries the display panel PNL, wherein the display panel PNL includes a first substrate 2, and the carrying portion 1 includes a carrying portion body 11 and a protective portion 12 that are interconnected, and at least a portion of the protective portion 12 is surrounded by a side surface 2a of the first substrate 2.

[0071] In the display module provided in the embodiment of the present disclosure, the carrying part 1 for carrying the display panel PNL includes a carrying part body 11 and a protective part 12 that are interconnected. The carrying part body 11 can also generate a certain supporting force for the protective part 12 while carrying the display panel PNL, and at least part of the protective part 12 is arranged around the side 2a of the first substrate 2. Compared with the prior art, on the one hand, the stability of the protective part 12 is enhanced by the carrying part body 11, and on the other hand, the protective part 12 is arranged around the side 2a of the first substrate 2, rather than only being arranged on the side of the first substrate 2 where the side line exists. Therefore, it is possible to enhance the protective effect of the first substrate 2 and improve the damage to the first substrate 2 caused by physical damage. In particular, when multiple display modules are spliced ​​together to form a spliced ​​display device, damage to the product caused by side collisions of the display modules during the splicing process is avoided, thereby avoiding affecting the display effect and improving the product yield.

[0072] In the display module provided in the embodiments of the present disclosure, the protective portion 12 in the carrier portion 1 can be formed by 3D printing, or can be formed as an integral structure with the carrier portion body 11. The two implementation methods are described in detail below in conjunction with specific embodiments.

[0073] Example 1

[0074] In some embodiments, the first substrate 2 is an LED light-emitting substrate. For example, the first substrate 2 can be a glass substrate with glass as the substrate material, or a flexible substrate with polyimide as the substrate material, which is not limited in the embodiments of the present disclosure.

[0075] In some embodiments, as shown in FIG1 , the display panel PNL further includes a functional layer 3 , which is located on a side of the first substrate 2 away from the carrier 1 , and an orthographic projection of the first substrate 2 on the functional layer 3 is located in the region where the functional layer 3 is located.

[0076] In some embodiments, the functional layer 3 includes a protective film and an adhesive layer 32. The protective film is located on the side of the adhesive layer 32 away from the first substrate 2. The protective film can be a film layer including carbon black particles, and its material can be polyethylene terephthalate (PET). The protective film is provided with multiple hollow portions, and the light-emitting areas of the light-emitting devices in the first substrate 2 are exposed in the hollow portions. That is, the protective film does not affect the light emission of the light-emitting devices. By providing the protective film, the contrast of the display image can be improved.

[0077] The bonding layer 32 may be made of adhesive material, such as optical adhesive, curing adhesive, etc., which is not limited in the embodiment of the present disclosure.

[0078] It should be understood that the functional layer 3 is attached to the light-emitting surface of the display substrate via the adhesive layer 32 after the display substrate is prepared, and the excess portion is removed by laser cutting after attachment. However, in general, the peripheral area of ​​the display substrate is provided with a circuit structure. If the functional layer 3 is cut along the boundary of the display substrate, it may damage the circuit structure. Therefore, a certain margin is left when cutting the functional layer 3. In other words, the edge of the functional layer 3 formed on one side of the display substrate after cutting is completed extends beyond the edge of the display substrate.

[0079] In one example, the indentation distance of the orthographic projection edge of the first substrate 2 on the functional layer 3 is in the range of 20 μm-200 μm compared to the edge of the functional layer 3 , thereby avoiding damage to the circuit structure in the peripheral area of ​​the first substrate 2 .

[0080] In some embodiments, as shown in Figure 1, the protective portion 12 is located between the functional layer 3 and the carrier body 11, and at least part of the protective portion 12 is in direct contact with the functional layer 3. The protective portion 12 can support the portion of the functional layer 3 suspended outside the first substrate 2, thereby protecting the functional layer 3.

[0081] In some embodiments, as shown in FIG1 , the protective portion 12 includes a first sub-portion 121. The first sub-portion 121 includes a first side a1 and a second side a2 disposed opposite each other, as well as a third side a3 and a fourth side a4 disposed opposite each other. The first side a1 is in direct contact with the functional layer 3, and the second side a2 is in direct contact with the carrier body 11, thereby effectively supporting the functional layer 3 based on the support force provided by the carrier body. The third side a3 of the first sub-portion 121 is in direct contact with the side surface 2a of the first substrate 2, thereby enhancing the protective effect on the first substrate 2.

[0082] In some embodiments, the first sub-section 121 is adhered to at least one of the functional layer 3, the carrier body 11, and the side surface 2a of the first substrate 2. For example, the material of the first sub-section 121 is a sticky adhesive material so that the first sub-section 121 is adhered to other contact structures.

[0083] In some embodiments, the first sub-portion 121 is conformal to the functional layer 3 at a position of direct contact, the first sub-portion 121 is conformal to the carrier body 11 at a position of direct contact, and the first sub-portion 121 is conformal to the side 2a of the first substrate 2 at a position of direct contact, so that the first sub-portion 121 arranged around the side of the first substrate 2 has good thickness uniformity, and the first sub-portion 121 provides uniform support force for the functional layer 3.

[0084] In some embodiments, the protective portion 12 can be formed by a 3D printing process. Compared with the method of forming a protective layer by coating or adhesion process, the protective portion 12 with a larger thickness can be prepared by 3D printing.

[0085] In some embodiments, the material of the protective portion 12 includes any one of a resin material, an optical adhesive material, a thermosetting adhesive material, and a hot melt adhesive material.

[0086] In some embodiments, the average thickness of the first sub-portion 121 on the side 2a perpendicular to the first substrate 2 is in the range of 20μm to 200μm. Preferably, the average thickness of the first sub-portion 121 on the side 2a perpendicular to the first substrate 2 is in the range of 35μm to 150μm. In related art, a protective layer with a thickness of approximately 4μm is applied to the side surfaces of the first substrate 2 and the portion of the non-display surface that connects to the side surfaces. The protective layer is typically made of OC adhesive. Due to the limitations of the protective layer coating process, the thickness of the protective layer is relatively small. In particular, at the chamfered corner where the non-display surface and the side surfaces of the first substrate 2 meet, the thickness of the protective layer can be less than 1μm. This increases the risk of electrostatic breakdown and damage to the first substrate 2 during assembly or use. In this embodiment, the protective portion 12 is formed using a 3D printing process. The increased thickness of the first sub-portion 121 of the protective portion 12 can significantly reduce the risk of damage to the first substrate 2 and improve its resistance to ESD breakdown, thereby enhancing the protective effect of the first substrate 2.

[0087] In some embodiments, the display module includes a connecting portion 4, with opposite sides of the connecting portion 4 respectively connected to the first substrate 2 and the supporting body 11. In one example, as shown in FIG1 , the material of the connecting portion 4 can include double-sided tape or a thermosetting adhesive material, which is not limited in the embodiments of the present disclosure.

[0088] Figure 2 is a planar structural diagram of the back side of a display module provided by an embodiment of the present disclosure. As shown in Figure 2 , a connecting portion 4 is provided on the back side of the display module, i.e., on the non-light-emitting side of the first substrate 2. Connecting portion 4 can include two parts: one ring-shaped portion located in the peripheral area of ​​the non-light-emitting side of the first substrate 2, and the other strip-shaped portion located in the middle area within the ring. The provision of connecting portion 4 improves the stability between the carrier body 11 and the first substrate 2.

[0089] In some embodiments, the protection portion 12 further includes a second sub-portion 122 . The second sub-portion 122 is located on a side of the first sub-portion 121 close to the first substrate 2 . The second sub-portion 122 includes a fifth side a5 , and oppositely disposed sixth and seventh sides a6 and a7 .

[0090] Among them, the fifth side a5 is located on the side of the second sub-section 122 away from the first sub-section 121, and is adjacent to or in contact with the connecting portion 4. As shown in Figure 1, since the protective portion 12 is surrounded on the side of the first substrate 2, it is equivalent to the protective portion 12 being a ring structure. At the same time, the second sub-section 122 is located on the side of the first sub-section 121 close to the first substrate 2. Based on this, the second sub-section 122 is arranged in the inner ring of the first sub-section 121. At the same time, during the preparation process, the second sub-section 122, as a part of the protective portion 12, is also formed by a 3D printing process. In the printing process, the second sub-section 122 on the inner ring is formed first, and then the first sub-section 121 on the outer ring is formed. Therefore, based on the characteristics of the preparation process, it cannot be guaranteed that the second sub-section 122 in the inner ring position can completely fill the channel structure formed by the first substrate 2, the connecting part 4 and the supporting part body 11. Specifically, when the channel structure is completely filled with 3D printing material, the fifth side a5 of the second sub-section 122 is arranged in contact with the connecting part 4. When the channel structure is partially filled with 3D printing material, the fifth side a5 of the second sub-section 122 is arranged adjacent to the connecting part 4.

[0091] In some embodiments, the sixth side a6 is in direct contact with the first substrate 2, and the seventh side a7 is in direct contact with the carrier body 11. The second sub-section 122 is conformal to the carrier body 11 at the point of direct contact, and the second sub-section 122 is conformal to the first substrate 2 at the point of direct contact. Similar to the material printing characteristics of the first sub-section 121, the second sub-section 122 and the structures in contact with it share common characteristics.

[0092] In some embodiments, the first sub-section 121 and the second sub-section 122 are integrally formed, using the same manufacturing method and fabricated from the same material in a single process. This simplifies the manufacturing process and improves product manufacturing efficiency. Furthermore, the protective portion 12 includes the first sub-section 121 and the second sub-section 122 as an integral structure, which helps improve the stability of the protective portion 12 and thereby enhances the protective effect of the protective portion 12 on the first substrate 2 and the functional layer 3.

[0093] Figure 3 is a schematic diagram of a preparation process for forming a protective portion by 3D printing provided by an embodiment of the present disclosure. As shown in Figure 3, the print head is directed vertically downward to spray the printing material into the channel structure formed by the first substrate 2, the connecting portion 4 and the supporting portion body 11, and first forms the second sub-portion 122 in the channel structure. However, due to process limitations, the printing material may not be able to completely fill the channel structure, and only a circle of printing material needs to be formed on the side of the first substrate 2 to form the first sub-portion 121 surrounding the side of the first substrate 2. Therefore, the channel structure does not need to be set too deep. If it is set too deep, it will be a waste of printing material. The depth of the above-mentioned channel structure is the distance between the side of the connecting portion 4 close to the edge of the first substrate 2 and the edge of the same side of the first substrate 2.

[0094] In some embodiments, the distance between the side of the connecting portion 4 close to the edge of the first substrate 2 and the edge of the same side of the first substrate 2 in a direction perpendicular to the thickness of the first substrate 2 is no more than 3 mm, for example, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc., to avoid waste of printing materials.

[0095] In some embodiments, first, the first side a1 of the first sub-portion 121 is in direct contact with the functional layer 3, and the second side a2 is in direct contact with the carrier body 11, effectively supporting the functional layer 3 based on the support force provided by the carrier body. Simultaneously, the thickness of the first sub-portion 121 on the side perpendicular to the first substrate 2 is the same as the indentation distance of the first substrate 2 on the functional layer 3, thereby filling the area where the functional layer 3 is suspended outside the first substrate 2. This allows the first sub-portion 121 to protect the side of the first substrate 2 while also protecting the functional layer 3. Therefore, the thickness of the first sub-portion 121 is 20 μm-200 μm, preferably 35 μm-150 μm. Secondly, the second sub-section 122 is sprayed onto the channel structure formed by the first substrate 2, the connecting portion 4, and the supporting body 11 through printing. However, due to limitations in the printing process, the printed material may not be able to completely fill the channel structure. Based on this, the thickness of the second sub-section 122 is less than 2 mm, with an average thickness between 1.4 mm and 1.7 mm. Preferably, the average thickness of the second sub-section 122 is 1.5 mm. In summary, the average thickness of the entire protective portion 12 is within the range of 1.42 mm to 1.9 mm.

[0096] Example 2

[0097] FIG4A is a schematic structural diagram of another display module provided by an embodiment of the present disclosure. As shown in FIG4A , the protective portion 12 in the carrier portion 1 and the carrier portion body 11 are an integrated structure.

[0098] It should be noted that the above-mentioned integrated structure means that the two parts forming the integrated structure are formed based on the same preparation process and are made of the same material.

[0099] In some embodiments, the main body of the carrier portion 1 and the protective portion 12 are made of the same material, which can be a metal material, such as copper, aluminum, or an alloy material with high hardness and strength.

[0100] In the embodiment of the present disclosure, the supporting body 11 and the protective part 12 of the display module are an integrated structure, and the protective part 12 is arranged around the side 2a of the first substrate 2, which is equivalent to forming a limiting groove with the annular protective part 12 and the supporting body 11. The first substrate 2 can be placed in the above-mentioned limiting groove to have a better protective effect on the side 2a of the first substrate 2 and a more stable bearing effect on the display panel PNL.

[0101] In addition, the specific positions, materials, and connection methods of the functional layer 3 and the connecting portion 4 provided on the display module in this embodiment and the first substrate 2 are the same as those in the first embodiment and are not described in detail herein.

[0102] In some embodiments, as shown in FIG. 4A , the carrier body 11 includes a groove 110 , and the orthographic projection of the connecting portion 4 on the carrier 1 is located within the orthographic projection of the groove 110 on the carrier 1 ; the connecting portion 4 is at least partially located in the groove 110 .

[0103] In one example, the thickness of the connecting portion 4 is 3 mm to 5 mm, and a groove 110 can be provided at a position of the supporting portion 1 corresponding to the connecting portion 4, so that at least a portion of the connecting portion 4 is located in the groove 110, thereby reducing the distance between the supporting portion 1 and the display panel PNL, thereby enhancing the anti-collision capability of the display panel PNL and increasing the impact angle of the display panel PNL within a safe range, which is beneficial to improving the protection effect of the display module.

[0104] In some embodiments, in order to avoid damaging the circuit structure in the peripheral area of ​​the first substrate 2, the edge of the functional layer 3 extends beyond the same side edge of the first substrate 2, but the positional relationship between the edge of the functional layer 3 and the same side edge of the carrier body 11 is not limited.

[0105] In some embodiments, the edges of the functional layer 3 and the same-side edges of the carrier body 11 can be flush. In this case, whether the protective portion 12 is formed by 3D printing of protective material or the protective portion 12 and the carrier body 11 are integrally formed, the same-side edges of the functional layer 3, the protective portion 12, and the carrier body 11 can be flush. On the one hand, the protective portion 12 can fully support the portion of the functional layer 3 that protrudes beyond the first substrate 2, preventing damage to the functional layer 3. On the other hand, the protective portion 12 surrounds the side surface 2a of the first substrate 2 to protect the first substrate 2 from external forces.

[0106] Figure 4B is a schematic diagram of the structure of another display module provided by an embodiment of the present disclosure. In some embodiments, the edge of the functional layer 3 is recessed relative to the same-side edge of the carrier body 11, while the protective portion 12 is flush with the outer edge of the carrier body 11. In other words, the edge of the functional layer 3 is recessed relative to the same-side edge of the protective portion 12, meaning that the orthographic projection of the functional layer 3 on the carrier body 1 is located within the area where the protective portion 12 is located. Based on this, as shown in Figure 4B, the carrier body 1 further includes a filling portion 123, which is located on the side of the protective portion 12 that extends beyond the area where the functional layer 3 is located, away from the carrier body 11.

[0107] In some embodiments, when the protective portion 12 is formed by 3D printing, the filling portion 123 includes an eighth side a8 and a ninth side a9. The eighth side a8 is flush with the outer side of the protective portion 12 and the outer side of the carrier body 11 on the same side. The ninth side a9 is in direct contact with the outer side of the functional layer 3, and the filling portion 123 is conformal to the functional layer 3 at the point of direct contact. The filling portion 123 and the protective portion 12 are integrally formed. In other words, the filling portion 123 and the protective portion 12 are printed and formed in the same manufacturing process.

[0108] In some embodiments, when the protective portion 12 is made of metal and forms an integral structure with the carrier body 11, as shown in FIG4B, the filling portion 123, the protective portion 12 and the carrier body 11 form an integral structure.

[0109] In summary, when the edge of the functional layer 3 is flush with the edge of the same side of the supporting body 11, the protective part 12 is provided so that the edges of the functional layer 3, the protective part 12 and the supporting body 11 are flush with each other, and the overall structure of the display module is a regular rectangular parallelepiped. After being filled with the protective part 12, there is no longer any protruding or concave structure on the side, so it can have better anti-collision ability, which is beneficial to improving the product yield and service life of the display module.

[0110] When the edge of the functional layer 3 is not flush with the edge of the supporting body 11 on the same side, the edge position of the functional layer 3 is filled by the filling part 123, so that the edges of the filling part 123, the protective part 12 and the supporting body 11 on the same side are flush, which can also enhance the anti-collision ability of the display module.

[0111] In addition, according to the description of the aforementioned embodiment, the functional layer 3 is connected to the first substrate 2 through the adhesive layer, and the protection of the edge of the functional layer 3 by the protective portion 12 / filling portion 123 can not only prevent the functional layer 3 from being damaged by external force, but also prevent the adhesive layer 32 from overflowing and being damaged due to lack of adhesive, so as to ensure the display effect of the display module.

[0112] In some embodiments, the first substrate 2 includes a display surface and a non-display surface that are arranged opposite to each other, and the side surface 2a of the first substrate 2 is located between the display surface and the non-display surface. The first substrate 2 also includes a flexible circuit board 21, which is connected to the connection terminals on the display surface and is bent to the non-display surface via the side surface; at least a portion of the protective portion 12 is located on the side of the flexible circuit board 21 away from the side surface, and is in contact with the portion of the flexible circuit board 21 located on the side surface. Since the protective portion 12 has a large thickness, the protective portion 12 is provided on the side of the flexible circuit board 21 away from the side surface, which can prevent the flexible circuit board 21 from being damaged by external forces and affecting the transmission of electrical signals; at the same time, the protective portion 12 can also protect the flexible circuit board 21 from being corroded by water and oxygen, improve the corrosion resistance of the flexible circuit board 21, and improve the ability of the display module to resist ESD breakdown, thereby having a good protective effect on the flexible circuit board 21.

[0113] In addition, the number of flexible circuit boards 21 in the embodiment of the present disclosure is related to the driving method of the display panel. When the display panel is driven by LTPS TFT (low-temperature polycrystalline silicon thin-film transistor), the maximum brightness supported by the display panel is improved compared to conventional TFT, but it also requires more drive signal lines in the peripheral area of ​​the display panel. In this case, the signal line requirements of the display panel and the narrow bezel design can be met simultaneously by increasing the number of flexible circuit boards 21. Specifically, the arrangement position and number of flexible circuit boards 21 can be flexibly adjusted according to the design of those skilled in the art, and the embodiment of the present disclosure is not limited thereto.

[0114] In one example, as shown in FIG2 , in the embodiment of the present disclosure, the first substrate 2 is connected to three flexible circuit boards 21 , two of which are used to provide driving signals, and the other flexible circuit board 21 is used to provide a power supply signal to increase the brightness of the display panel and reduce the line width.

[0115] In some embodiments, the first substrate 2 may be an array substrate, the functional layer 3 may be a color filter substrate, and the display module may further include a liquid crystal layer positioned between the array substrate and the color filter substrate. In other words, the display module provided in the embodiments of the present disclosure may include a liquid crystal display panel PNL, and the protective portion 12 may be provided on the carrier portion 1 to protect the liquid crystal display panel PNL.

[0116] Example 3

[0117] Based on the same inventive concept, the present disclosure also provides a spliced ​​display device, comprising a housing and a plurality of display modules located on the housing. The display modules may be any of the display modules provided in the aforementioned embodiments. When any of the aforementioned display modules is applied to the spliced ​​display device, it can achieve the same technical effects as the display modules, and therefore will not be further described here.

[0118] For example, in the spliced ​​display device further provided in the embodiment of the present disclosure, a plurality of display modules are arranged in an array.

[0119] For example, in the spliced ​​display device further provided in the embodiments of the present disclosure, the outer contour of the display panel included in the display module can be rectangular. For example, the display area of ​​the display module is rectangular. For example, the outer contour of the display module is rectangular. For example, the outer contour of the spliced ​​display device as a whole is rectangular.

[0120] In some embodiments, based on the display module shown in Example 1, a buffer structure can be set on the side of the supporting body 11 in the supporting part 1 to absorb the expansion when the supporting part 1 generates thermal expansion, thereby avoiding the appearance of large seams between adjacent display modules, affecting the display effect.

[0121] Figure 5 is a structural schematic diagram of a carrier body provided in an embodiment of the present disclosure, Figure 6 is a structural schematic diagram of a plurality of carrier bodies in a spliced ​​state provided in an embodiment of the present disclosure, Figure 7 is a structural schematic diagram of a spliced ​​display device provided in an embodiment of the present disclosure, Figure 8 is a schematic diagram of an orthographic projection of a display module provided in an embodiment of the present disclosure on a reference surface, and Figure 9 is an enlarged view of the W area in Figure 8.

[0122] In some embodiments, the distance D2 between two adjacent supporting bodies is smaller than the distance D1 between the display panels respectively supported by the two supporting bodies, wherein the distance D2 between the two supporting bodies is: the distance between the second edges L2 of the two corresponding supporting bodies.

[0123] It should be understood that in a tiled display device comprising multiple COG (Chip On Glass) display modules, due to limitations in display panel resolution, the spacing between display panels in adjacent display modules has a maximum value. Exceeding the maximum spacing Dmax results in a large seam between adjacent display modules, affecting the display quality. Therefore, the spacing between display panels is a first spacing D1 that is less than Dmax. Furthermore, because the display panels in a COG display module are supported by a glass substrate, which has poor collision resistance and is easily damaged, the edge of the supporting portion protrudes beyond the edge of the glass substrate. Consequently, the second spacing D2 between the supporting portions in adjacent display modules is less than the first spacing D1.

[0124] In some embodiments, when the temperature is 25° C., ie, room temperature, and the pixel pitch of the display panel PNL is 0.8 mm-1.5 mm, the distance D1 between the edges of two adjacent display panels PNL is between 100 μm and 200 μm.

[0125] The smaller the spacing between the edges of two adjacent display panels, the smaller the display seam. However, due to current assembly process limitations, seamless splicing is not possible. Therefore, taking into account the pixel pitch of the display panels, an appropriate seam spacing D1 is set to allow the configuration of two adjacent display panels to be compatible with current assembly processes while not affecting the display quality. For example, when the pixel pitch of the display panel is 1.3mm, the spacing D1 between the edges of two adjacent display panels PNL is approximately 140μm; when the pixel pitch of the display panel is 0.93mm, the spacing D1 between the edges of two adjacent display panels PNL is approximately 180μm.

[0126] It should be noted that when the display panel PNL includes a stacked first substrate 2 and a functional layer 3, and the functional layer 3 is located on the side of the first substrate 2 away from the carrier body 11, the first substrate 1 is retracted relative to the functional layer 3. In this case, the distance between the edges of two adjacent display panels PNL refers to the distance between the edges of two adjacent functional layers 3. In addition, the range of the retraction of the first substrate 1 relative to the functional layer 3 is described in the previous embodiment and will not be repeated here.

[0127] In a spliced ​​display device, the heat generated by the display panel will cause the supporting body located below it to thermally expand, and the maximum thermal expansion between two adjacent supporting bodies is the second distance D2. When the expansion is greater than D2, the two supporting bodies contact and squeeze each other, causing the display panels they carry to separate as the supporting bodies expand. The splicing between adjacent display modules increases, ultimately affecting the display effect, as more obvious dark seams appear when displaying white images.

[0128] Based on this, in some embodiments, as shown in Figures 5-9, the display module provided by the present disclosure includes a carrier body 11 having a top surface facing the display panel, a bottom surface facing away from the display panel, and multiple side surfaces located between the top surface and the top surface. The multiple side surfaces include at least one first side surface 111, and the first side surface 111 is a concave-convex surface. The first side surface 111 has multiple protrusions 11a and multiple recesses 11b, and the protrusions 11a and the recesses 11b are alternately arranged in the extension direction of the connecting line between the bottom surface and the first side surface 111. The edge of the orthographic projection of the display panel PNL on the plane where the carrier body 11 is located is the first edge L1, the edge of the protruding side of the protruding portion 11a is the second edge L2, and the edge of the recessed side of the recessed portion 11b is the third edge L3. The second edge L2 and the third edge L3 are respectively located on both sides of the first edge L1.

[0129] It should be noted that, in some embodiments, the bearing body 11 provided in the embodiments of the present disclosure may be a solid structure, that is, the bearing body 11 is in the shape of a rectangular parallelepiped, having a top surface facing the display panel, and the top surface is in contact with the non-display surface of the display panel, as well as a bottom surface facing away from the display panel and multiple side surfaces located between the top surface and the top surface; in other embodiments, the bearing body 11 provided in the embodiments of the present disclosure may also be a trough structure, that is, the bearing body 11 has a bottom wall and multiple side walls surrounding the bottom wall, and the multiple side walls and the bottom wall define a accommodating space, wherein the bottom surface is the surface of the bottom wall away from the accommodating space, and the side surface is the surface of the side wall facing the display panel.

[0130] In some embodiments, as shown in Figures 5-9 , at any point on the first side surface 111, a line extending in the thickness direction of the carrier body 11 passes through only one protrusion 11a or only one recess 11b. In other words, the protrusions 11a and recesses 11b are alternately arranged only in the direction of the line connecting the bottom surface and the first side surface 111, and there is only one protrusion 11a or recess 11b in the thickness direction of the carrier body 11.

[0131] In some embodiments, for two adjacent display modules of the spliced ​​display device, the protrusion 11a of one first side surface 111 and the recessed portion 11b of the other first side surface 111 are disposed opposite each other, with a gap between the opposing protrusions 11a and recessed portions 11b. This gap represents the maximum expansion D3 of the carrier body 11 when it is heated, as described in the following embodiments.

[0132] First, as shown in Figures 5 to 9, the spacing between the display panels PNL of two adjacent display modules in the spliced ​​display device is a first spacing D1. Since the side of the supporting body 11 is provided with multiple protrusions 11a and multiple recesses 11b, in order to avoid collision with the display panel edge L1, it is only necessary to protrude the second edge L2 of the protrusion 11a beyond the first edge L1 of the first substrate 2. Then, the spacing between the outermost edges of the two adjacent display modules, i.e., the second edge L2 of the supporting body 11, is D2. However, since the side of the supporting body 11 is configured as a concave-convex shape, the maximum thermal expansion between the two adjacent supporting bodies 11 is the second spacing D2 + the protruding distance of the protrusion 11a (the recessed distance of the recessed portion 11b). Therefore, when the supporting body 1 undergoes thermal expansion, the absorption of the thermal expansion is greatly improved, thereby avoiding the appearance of large seams between adjacent display modules, which would affect the display effect.

[0133] In some embodiments, as shown in Figures 5 to 9 , the distance Δd between the second edge L2 and the third edge L3 is between 0.4 mm and 0.6 mm. In other words, the protruding distance of the protruding portion 11a or the recessed distance of the recessed portion 11b is Δd.

[0134] In the disclosed embodiment, after multiple protrusions 11a and multiple recesses 11b are provided on the side of the carrier body 1, when the carrier body 1 undergoes thermal expansion, the edges of the protrusions 11a in display module A contact and squeeze the edges of the corresponding recesses 11b in display module B, causing the display panels PNL carried by each module to separate as the carrier body 11 expands. This increases the gap between adjacent display modules, ultimately affecting the display quality. Therefore, the distance D3 between the edge of the protrusion 11a in display module A and the edge of the corresponding recess 11b in display module B is the maximum amount of expansion of the carrier body 11 that does not affect the display quality of the display panels PNL. Furthermore, D3 is equal to the sum of the distance D2 between the outermost edges of two adjacent display modules and the recess distance Δd of the recess 11b. Compared with the splicing display device in which the side of the supporting body is arranged flush, the maximum expansion amount of the supporting body 11 increases by Δd, that is, 0.4mm~0.6mm. For example, Δd can be any one of 0.4mm, 0.5mm, and 0.6mm, which is not limited in the embodiment of the present disclosure.

[0135] In some embodiments, the distance D3 between the second edge L2 of the protrusion 11a and the third edge L3 of the recessed portion 11b opposite to the protrusion 11a in the adjacent display module is 70μm-100μm, that is, the maximum expansion amount of the supporting body 11 between the display modules is 70μm-100μm. For example, D3 can be any one of 70μm, 80μm, 90μm, 100μm, 110μm, 120μm, and 130μm, which is not limited in the embodiments of the present disclosure.

[0136] It should be understood that on the carrier body 11 of the same display module, a protrusion 11a is defined between two adjacent recesses 11b, and a recess 11b is defined between two adjacent protrusions 11a. Furthermore, in two adjacent display modules, the protrusion 11a is positioned opposite the recess 11b of the other display module. In other words, the protrusion 11a defined between two recesses 11b in one display module engages with the recess 11b of the other display module during thermal expansion.

[0137] Based on this, the spacing between two adjacent recesses 11b is equal to the spacing between two adjacent protrusions 11a, so that the recesses 11b and protrusions 11a in different display modules can be correspondingly engaged, thereby increasing the thermal expansion capacity of the support member 1. In one example, on the same support member, the length l of the protrusions 11a and / or recesses 11b in the direction from the protrusion to the recess is greater than 1 mm. For example, l can be set to 1 mm-1.5 mm, so that the recesses 11b and protrusions 11a in different display modules can be effectively engaged.

[0138] In some embodiments, as shown in FIG9 , the second edge L2 and the third edge L3 are equidistant from the first edge L1. The protruding portion 11a protrudes from the second edge L2 of the display panel, thereby improving the display panel PNL's anti-collision capability. The recessed portion 11b is recessed inwardly from the third edge L3 of the display panel PNL by a distance equal to the distance between the third edge L3 and the first edge L1. This retraction of the recessed portion 11b provides more expansion space for the carrier body 11.

[0139] In some embodiments, the orthographic projection of the protrusion 11a onto the bottom plane is any one of a rectangle, a trapezoid, or a triangle. Correspondingly, the orthographic projection of the recessed portion 11b onto the bottom plane is any one of a rectangle, a trapezoid, or a triangle. Preferably, the orthographic projections of the protrusion 11a and / or the recessed portion 11b onto the bottom plane are trapezoidal. This allows the protrusion to expand in any direction and still fit into the corresponding recessed portion, while also avoiding sharp corners and making installation more difficult.

[0140] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A display module, comprising a display panel and a carrying portion for carrying the display panel, characterized in that: The display panel includes a first substrate. The carrying part comprises a carrying part body and a protecting part which are connected to each other, and at least a part of the protecting part is arranged around a side surface of the first substrate.

2. The display module according to claim 1, characterized in that: The display panel further includes a functional layer, the functional layer is located on a side of the first substrate away from the carrying portion, and an orthographic projection of the first substrate on the functional layer is located in a region where the functional layer is located; The protection portion is located between the functional layer and the carrier body, and at least a portion of the protection portion is in direct contact with the functional layer.

3. The display module according to claim 2, characterized in that: The protection portion includes a first sub-portion, the first sub-portion includes a first side and a second side that are oppositely disposed, and a third side and a fourth side that are oppositely disposed; The first side is in direct contact with the functional layer, the second side is in direct contact with the carrier body, and the third side is in direct contact with the side surface of the first substrate.

4. The display module according to claim 3, characterized in that: The first sub-section is bonded to at least one of the functional layer, the carrier body, and the side surface of the first substrate; The first sub-portion is conformal to the functional layer at a position in direct contact, the first sub-portion is conformal to the carrier body at a position in direct contact, and the first sub-portion is conformal to the side surface of the first substrate at a position in direct contact.

5. The display module according to claim 3, characterized in that: An average thickness of the first sub-portion at a side perpendicular to the first substrate is in a range of 20 μm to 200 μm.

6. The display module according to claim 3, characterized in that: The display module comprises a connecting portion, and opposite sides of the connecting portion are respectively connected to the first substrate and the bearing body; The protection portion further includes a second sub-portion, the second sub-portion is located on a side of the first sub-portion close to the first substrate, and the second sub-portion includes a fifth side, and a sixth side and a seventh side that are oppositely arranged; The fifth side is located at a side of the second sub-section away from the first sub-section, and is disposed adjacent to or in contact with the connecting portion; The sixth side is in direct contact with the first substrate, and the seventh side is in direct contact with the carrier body; the second sub-portion is conformal to the carrier body at a position of direct contact, and the second sub-portion is conformal to the first substrate at a position of direct contact; The first sub-section and the second sub-section are an integral structure.

7. The display module according to claim 6, characterized in that: The distance between a side of the connecting portion close to the edge of the first substrate and the edge of the first substrate on the same side thereof in a direction perpendicular to the thickness of the first substrate is no more than 3 mm.

8. The display module according to claim 3, characterized in that: The indentation distance of the orthographic projection edge of the first substrate on the functional layer compared with the edge of the functional layer is in the range of 20 μm-200 μm; The outer side surface of the protection portion is flush with the outer side surface of the bearing portion body on the same side.

9. The display module according to claim 8, characterized in that: The outer side surface of the protection portion is flush with the outer side surface of the bearing portion body on the same side and the outer side surface of the functional layer on the same side.

10. The display module according to claim 8, characterized in that: At least part of the protective portion exceeds the area where the functional layer is located; The bearing part further comprises a filling part, and the filling part is located on a side of the portion of the protective part beyond the area where the functional layer is located and away from the bearing part body; The filling portion includes an eighth side and a ninth side, the eighth side is flush with the outer side surface of the protection portion and the outer side surface of the bearing portion body on the same side; the ninth side is in direct contact with the outer side surface of the functional layer, and the filling portion is conformal with the functional layer at a position of direct contact; The filling part and the protection part are an integrated structure.

11. The display module according to claim 3, characterized in that: The material of the protection part includes: any one of resin material, optical adhesive material, thermosetting adhesive material and hot melt adhesive material.

12. The display module according to claim 1, characterized in that: The average thickness of the protective portion at a side perpendicular to the first substrate is in the range of 1.42 mm to 1.9 mm; The protection part and the bearing part body are an integrated structure.

13. The display module according to claim 12, characterized in that: The display module comprises a connecting portion, and opposite sides of the connecting portion are respectively connected to the first substrate and the bearing body; The bearing portion body comprises a groove, the orthographic projection of the connecting portion on the bearing portion is located within the orthographic projection of the groove on the bearing portion; and the connecting portion is at least partially located in the groove.

14. The display module according to any one of claims 1 to 13, characterized in that: The first substrate comprises a display surface and a non-display surface which are arranged opposite to each other, and a side surface of the first substrate is located between the display surface and the non-display surface. The first substrate also includes a flexible circuit board, and the flexible circuit board is connected to the display surface The connecting terminal is connected to and bent through the side surface to the non-display surface; At least a portion of the protection portion is located on a side of the flexible circuit board away from the side surface, and is in contact with a portion of the flexible circuit board located on the side surface.

15. The display module according to any one of claims 2 to 13, characterized in that: The first substrate is an LED light-emitting substrate; The functional layer includes a black film.

16. The display module according to any one of claims 2 to 13, characterized in that: The first substrate is an array substrate, the functional layer is a color filter substrate, and the display module further includes a liquid crystal layer located between the array substrate and the color filter substrate. .

17. A splicing display device, characterized in that: It comprises a box body and a plurality of display modules located on the box body, wherein the display modules are the display modules described in any one of claims 1-16.

18. The splicing display device according to claim 17, characterized in that: In the display module according to any one of claims 1 to 7, the bearing body has a top surface facing the display panel, a bottom surface facing away from the display panel, and a plurality of side surfaces between the top surface and the bottom surface; The plurality of side surfaces include at least one first side surface, the first side surface is a concave-convex surface, and the first side surface has a plurality of protrusions and a plurality of concave portions, and the protrusions and the concave portions are alternately arranged in an extension direction of a connecting line between the bottom surface and the first side surface; The edge of the display panel's positive projection on the plane where the bearing body is located is the first edge, the edge of the protruding side of the protruding portion is the second edge, and the edge of the concave side of the concave portion is the third edge. The second edge and the third edge are respectively located on both sides of the first edge.

19. The splicing display device according to claim 18, characterized in that: For any point of the first side surface, an extension line in the thickness direction of the bearing body passes through only one of the protruding portions or only one of the recessed portions.

20. The splicing display device according to claim 18, characterized in that: The spliced ​​display device comprises two first side surfaces respectively belonging to the two display modules and arranged opposite to each other; The protruding portion on one of the first side surfaces is arranged opposite to the recessed portion on the other first side surface, and a gap is provided between the protruding portion and the recessed portion that are arranged opposite to each other.

21. The splicing display device according to claim 18, characterized in that: The distance between the second edge and the third edge is between 0.4 mm and 0.6 mm.

22. The splicing display device according to claim 18, characterized in that: The second edge and the third edge are respectively spaced equidistant from the first edge.

23. The splicing display device according to claim 18, characterized in that: The orthographic projection of the protruding portion and / or the recessed portion on the plane where the bottom surface is located is a trapezoid.

24. The splicing display device according to claim 18, characterized in that: The distance between two adjacent carrying body parts is smaller than the distance between the display panels respectively carried by the two carrying body parts, wherein the distance between the two carrying body parts is: the distance between the second edges of the two corresponding carrying body parts.

25. The splicing display device according to claim 18, characterized in that: The distance between the second edge of the protruding portion and the third edge of the recessed portion opposite to the protruding portion in the adjacent display module is 70 μm-100 μm.

26. The splicing display device according to claim 18, characterized in that: When the temperature is 25° C. and the pixel pitch of the display panel is 0.8 mm-1.5 mm, the spacing between the edges of two adjacent display panels is between 100 μm and 200 μm.

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