Display module, spliced display screen and manufacturing method thereof, and display device

Abstract

The application provides a display module, a spliced display screen and a manufacturing method thereof, and a display device. The display module comprises a sub-screen and a connecting substrate located on one side of the backlight surface of the sub-screen. The display module has at least a first state and a second state. The area of the connecting substrate in the second state is greater than that in the first state. The ratio of the area of the connecting substrate to the area of the orthographic projection of the sub-screen on the connecting substrate in the second state is less than that in the first state. The display module of the application has an expansion rate of the connecting substrate greater than that of the sub-screen. Therefore, in the process of changing from the first state to the second state, the connecting substrates of adjacent display modules abut against each other, while the adjacent sub-screens do not abut against each other. The arrangement of the connecting substrate can avoid the knocking phenomenon of the adjacent sub-screens, thereby improving the yield of products.

Description

Technical Field

[0001] This application relates to the field of display equipment technology, and in particular to a display module, a splicing display screen and its manufacturing method, and a display device. Background Technology

[0002] With the rapid development of display technology, people's requirements for display devices are constantly increasing. In order to achieve a larger display area, the application of splicing multiple display modules together is becoming more and more widespread.

[0003] To ensure the final display effect of the splicing screen, the distance between adjacent display modules is usually set to a small value. During the manufacturing process of the splicing screen, adjacent display modules are prone to collisions and damage, which in turn affects the yield rate of the splicing screen. Summary of the Invention

[0004] This application provides a display module, a splicing display screen, a manufacturing method thereof, and a display device, which can prevent adjacent sub-screens from colliding.

[0005] In a first aspect, embodiments of this application provide a display module, which includes a sub-screen and a connection substrate located on one side of the backlight surface of the sub-screen. The display module has at least a first state and a second state.

[0006] The area of ​​the connecting substrate in the second state is greater than the area of ​​the connecting substrate in the first state, and the ratio of the orthographic projection area of ​​the sub-screen on the connecting substrate in the second state to the area of ​​the connecting substrate is less than the ratio of the orthographic projection area of ​​the sub-screen on the connecting substrate to the area of ​​the connecting substrate in the first state.

[0007] In some embodiments, the display module further includes multiple signal lines, including a first sub-segment located on one side of the sub-screen and connected to the sub-screen, a second sub-segment located on one side of the backlight surface of the sub-screen, and a connecting segment disposed on the outer periphery of the sub-screen for connecting the first sub-segment and the second sub-segment. In the second state, the connecting segment is located within the orthographic projection range of the connecting substrate.

[0008] In some embodiments, in the first state, the connecting segment is located within the orthographic projection range of the connecting substrate onto the sub-screen.

[0009] In some embodiments, the display module includes a connection terminal for connecting a sub-screen and a connection substrate, the connection terminal being disposed away from the second sub-segment.

[0010] In some embodiments, the connecting substrate includes a plurality of sub-substrates, and in a first state, the sub-substrates are disposed overlapping at least one edge of the sub-screen at the orthogonal projection edge of the sub-screen.

[0011] In some embodiments, the sub-substrate is disposed at the orthographic projection edge of the sub-screen that overlaps with the two edges of the sub-screen.

[0012] In some embodiments, the connecting substrate includes a thermally expanding material, and the coefficient of thermal expansion of the connecting substrate is greater than that of the sub-screen.

[0013] Alternatively, the connecting substrate may include a cold-expanding material, and the coefficient of cold expansion of the connecting substrate may be greater than that of the sub-screen.

[0014] Secondly, this application also provides a splicing display screen, including the display module of any of the foregoing embodiments, wherein the connecting substrates of adjacent display modules abut against each other, and the sub-screens of adjacent display modules are spaced apart.

[0015] In some embodiments, a sub-screen includes a plurality of pixel units, and the distance between adjacent sub-screens is smaller than the size of the pixel unit.

[0016] In some embodiments, the distance between adjacent sub-screens is no greater than 900 μm.

[0017] Thirdly, embodiments of this application provide a display device, including a splicing display screen of any of the foregoing embodiments.

[0018] Fourthly, embodiments of this application provide a method for manufacturing a splicing display screen, comprising:

[0019] S100 provides multiple display components, including an initial state sub-screen and an initial state connection substrate located on one side of the backlight surface of the initial state sub-screen;

[0020] S110. Process multiple display components under preset environmental conditions to expand the display components to form a display module. The display module includes a final state sub-screen and a final state connecting substrate located on one side of the backlight surface of the final state sub-screen. The ratio of the positive projection area of ​​the final state sub-screen on the final state connecting substrate to the area of ​​the final state connecting substrate is smaller than the ratio of the positive projection area of ​​the initial state sub-screen on the initial state connecting substrate to the area of ​​the initial state connecting substrate.

[0021] S120: Multiple display modules are spliced ​​together by abutting each other with the final state connection substrates of adjacent display modules while maintaining a preset spacing distribution between adjacent final state sub-screens.

[0022] In some embodiments, in step S110, the initial-state connection substrate of the display component is expanded by changing the ambient temperature conditions.

[0023] This application provides a display module, a splicing display screen, a manufacturing method thereof, and a display device. Because the expansion rate of the connecting substrate of the display module is greater than that of the sub-screen, during the transition of the display module from the first state to the second state, the adjacent connecting substrates in adjacent display modules will abut against each other, while the adjacent sub-screens will not abut against each other. That is, the setting of the connecting substrate can prevent adjacent sub-screens from bumping each other, and improve the product yield without changing the process precision. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a display module in a first state according to an embodiment of this application;

[0026] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0027] Figure 3 This is a schematic diagram of the structure of a display module in a second state according to an embodiment of this application;

[0028] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure at point BB;

[0029] Figure 5 This is a schematic diagram of the structure of another display module provided in the embodiments of this application in the first state;

[0030] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure at point CC;

[0031] Figure 7 This is a schematic diagram of the structure of a splicing display screen provided in an embodiment of this application;

[0032] Figure 8 This is a schematic diagram of the structure of a display device provided in an embodiment of this application;

[0033] Figure 9 This is a flowchart illustrating a method for manufacturing a splicing display screen according to an embodiment of this application;

[0034] Figures 10a to 10c This is a schematic diagram illustrating the manufacturing process of a splicing display screen provided in an embodiment of this application.

[0035] Marker explanation:

[0036] 1. Sub-screen; 11. Backlight surface; 12. Pixel unit;

[0037] 2. Connecting substrate; 21. Sub-substrate;

[0038] 3. Signal line; 31. First sub-segment; 32. Second sub-segment; 33. Connecting segment;

[0039] 4. Connecting terminals;

[0040] 11' Initial state sub-screen; 12' Initial state connecting substrate;

[0041] 21' Final state sub-screen; 22' Final state connection substrate. Detailed Implementation

[0042] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0044] With increasing display demands, the market requires larger display devices, leading to the rapid development of large-size splicing displays, including seamless large-size splicing displays. Seamless splicing displays require a small gap between adjacent display modules, necessitating higher precision alignment technology. If alignment is not accurate during splicing, sub-screens in adjacent modules can easily collide, affecting the display effect and yield rate. However, the high-precision alignment and fixation of seamless splicing are difficult to achieve with current processes. Therefore, even in existing seamless splicing display technologies, the problem of collisions between adjacent sub-screens still exists.

[0045] To solve the above problems, firstly, please refer to [the relevant information]. Figures 1 to 4 This application provides a display module, which includes a sub-screen 1 and a connecting substrate 2 located on one side of the backlight surface 11 of the sub-screen 1. The display module has at least a first state and a second state.

[0046] The area of ​​the connecting substrate 2 in the second state is greater than the area of ​​the connecting substrate 2 in the first state, and the ratio of the orthographic projection area of ​​the sub-screen 1 on the connecting substrate 2 in the second state to the area of ​​the connecting substrate 2 is less than the ratio of the orthographic projection area of ​​the sub-screen 1 on the connecting substrate 2 to the area of ​​the connecting substrate 2 in the first state.

[0047] Each display module is an independent unit capable of displaying effects, and multiple display modules can be spliced ​​together to form a large-size splicing display screen. Sub-screen 1 within the display module is used to implement the display function. Sub-screen 1 can be configured in various ways; for example, it can be a micro-light-emitting diode (LED) screen. A micro-light-emitting diode is a composite structure formed by multiple film layers, including, for example, a substrate layer, a driving device layer located on the substrate layer, a light-emitting structure layer, and an encapsulation layer.

[0048] The connecting substrate 2 is disposed on one side of the backlight surface 11 of the sub-screen 1, serving to connect the sub-screen 1 and protect it. Specifically, initially, multiple display modules in their first state are placed side-by-side to form a large-size splicing display screen. Then, by changing environmental conditions, the multiple display modules in their first state transform into display modules in their second state, expanding and increasing the area of ​​the connecting substrate 2 and the sub-screen 1. During this process, because the ratio of the projected area of ​​the sub-screen 1 on the connecting substrate 2 in the second state to the area of ​​the connecting substrate 2 is smaller than that in the first state, i.e., the expansion rate of the connecting substrate 2 is greater than that of the sub-screen 1, adjacent connecting substrates 2 in adjacent display modules will abut against each other during the transformation from the first state to the second state, while adjacent sub-screens 1 will not abut against each other. This avoids collisions between adjacent sub-screens 1 and improves the product yield.

[0049] It should be noted that the area of ​​the connecting substrate 2 mentioned in this application embodiment refers to the surface area of ​​the connecting substrate 2 facing the sub-screen 1; while the area of ​​the sub-screen 1 refers to the orthographic projection area of ​​the sub-screen 1 on the connecting substrate 2 along its own thickness direction. Furthermore, this application embodiment does not limit the areas of the connecting substrate 2 and the sub-screen 1 in the first state. Optionally, in the first state, the area of ​​the sub-screen 1 is smaller than the area of ​​the connecting substrate 2, and the orthographic projection of the sub-screen 1 on the connecting substrate 2 is located within the area of ​​the connecting substrate 2.

[0050] In this embodiment, since the expansion rate of the connecting substrate 2 is greater than that of the sub-screen 1, during the transition of the display module from the first state to the second state, the adjacent connecting substrates 2 in the adjacent display modules will abut against each other, while the adjacent sub-screens 1 will not abut against each other. That is, the setting of the connecting substrate 2 can prevent the adjacent sub-screens 1 from bumping against each other, and can improve the product yield without changing the process precision.

[0051] like Figure 4 As shown, in some embodiments, the display module includes multiple signal lines 3. The signal lines 3 include a first sub-segment 31 located on one side of the sub-screen 1 and connected to the sub-screen 1, a second sub-segment 32 located on one side of the backlight surface 11 of the sub-screen 1, and a connecting segment 33 disposed on the outer periphery of the sub-screen 1 and used to connect the first sub-segment 31 and the second sub-segment 32. In the second state, the connecting segment 33 is located within the orthographic projection range of the connecting substrate 2.

[0052] Signal lines 3 are metal traces that enable display and touch functions on sub-screen 1. Signal lines 3 include, but are not limited to, data lines and scan lines. Typically, signal lines 3 need to connect the corresponding driver devices to the corresponding driver chips to achieve signal transmission. However, in order to improve the display effect of sub-screen 1 in the display module, the driver chip needs to be located on the backlight side 11 of sub-screen 1.

[0053] To achieve the signal transmission function of signal line 3, the signal line 3 in this embodiment includes a first sub-segment 31, a second sub-segment 32, and a connecting segment 33. The first sub-segment 31 is located within the driving device layer of the sub-screen 1 and is used to directly connect with the corresponding driving device within the sub-screen 1. The second sub-segment 32 is located on one side of the backlight surface 11 of the sub-screen 1 and is used to directly connect with the corresponding driving chip. The connecting segment 33 is located on the outer periphery of the sub-screen 1 and is used to connect the first sub-segment 31 and the second sub-segment 32.

[0054] Since the connecting segment 33 is located on the outer periphery of the sub-screen 1, the connecting ends of adjacent sub-screen 1 components are prone to collision during the fabrication of the splicing display screen, resulting in damage to the connecting segment 33. To avoid this phenomenon, in this embodiment, the connecting segment 33 in the second state is controlled to be located within the orthographic projection range of the connecting substrate 2, that is, there is a certain distance between the connecting segment 33 and the edge of the connecting substrate 2. This design allows the connecting substrate 2 to protect the sub-screen 1 while also protecting the signal line 3, ensuring that the connecting segment 33 of adjacent display modules in the second state will not be damaged by collision, thus improving the reliability of the signal line 3.

[0055] In some embodiments, in the first state, the connecting segment 33 is located within the orthographic projection range of the connecting substrate 2. In the first state, both the signal line 3 and the sub-screen 1 in the display module are located within the orthographic projection range of the connecting substrate 2, thereby ensuring that both the sub-screen 1 and the signal line 3 in the display module can be protected by the connecting substrate 2. This ensures that the sub-screen 1 and the signal line 3 can avoid collisions during the handling of the display module in the first state, further improving the reliability of the display module.

[0056] Please see Figure 2 and Figure 4 In some embodiments, the display module further includes a connection terminal 4 for connecting the sub-screen 1 and the connection substrate 2, the connection terminal 4 being disposed away from the second sub-segment 32.

[0057] The connecting substrate 2 is located on one side of the backlight surface 11 of the sub-screen 1 and is connected to the sub-screen 1 via a connecting terminal 4. The connecting terminal 4 can be configured in various ways, such as protruding from the backlight surface 11 of the sub-screen 1. One end of the connecting terminal 4 in the thickness direction of the display module is connected to the sub-screen 1, and the other end is connected to the substrate 2. Optionally, the connecting terminal 4 includes an adhesive.

[0058] As can be seen from the above, the second sub-segment 32 is located on one side of the backlight surface 11 of the sub-screen 1. Therefore, in order to reduce the impact of the presence of the connecting substrate 2 on the second sub-segment 32, the present application embodiment provides a connecting terminal 4 between the connecting substrate 2 and the sub-screen 1. The connecting terminal 4 is used to connect the connecting substrate 2 and the sub-screen 1. The projection area of ​​the connecting terminal 4 on the connecting substrate 2 is smaller than the area of ​​the connecting substrate 2, and the orthographic projection of the connecting terminal 4 on the sub-screen 1 is spaced apart from the second sub-segment 32.

[0059] This design can reduce the impact of the presence of the connecting substrate 2 on the second sub-segment 32, increase the distributable area of ​​the second sub-segment 32, thereby increasing the spacing between adjacent signal lines 3 and reducing the risk of interference between adjacent signal lines 3.

[0060] Please see Figure 5 and Figure 6 In some embodiments, the connecting substrate 2 includes a plurality of sub-substrates 21. In a first state, the sub-substrates 21 overlap with at least one edge of the sub-screen 1 at the orthographic projection edge of the sub-screen 1. Figure 5 The dashed line in the figure represents the orthographic projection of the sub-substrate 21 onto the sub-screen 1.

[0061] There are multiple connection terminals 4, which are used to connect multiple sub-substrates 21 to the sub-screen 1. Each sub-substrate 21 may have one or more connection terminals 4. Optionally, the connection terminals 4 are arranged in an array on one side of the backlight surface 11 of the sub-screen 1, and one sub-substrate 21 is connected to one connection terminal 4. This design can reduce the number of connection terminals 4, thereby allowing the second sub-segment 32 to have a larger distribution area.

[0062] In this embodiment, in the first state, each sub-substrate 21 overlaps with at least one edge of the sub-screen 1 on its projected edge, thereby enabling each sub-substrate 21 to protect at least one edge of the sub-screen 1. Specifically, during the transition from the first state to the second state, since the expansion rate of the sub-substrate 21 is greater than that of the sub-screen 1, the distance between the edge of the sub-substrate 21 and the edge of the sub-screen 1 gradually increases. This allows the edge of the sub-screen 1 to be recessed relative to the edge of the sub-substrate 21 in the second state, preventing collisions between adjacent sub-screens 1 and protecting the sub-screen 1.

[0063] It should be noted that the sub-substrate 21 can be square, polygonal, or other shapes. Furthermore, it is understood that the size and shape of the sub-substrate 21 are determined by the size and shape of the sub-screen 1, and this embodiment does not impose any limitations on this. Optionally, the number of sub-substrate 21 is the same as the number of edges of the sub-screen 1; that is, if the sub-screen 1 has a square structure, then both the number of edges of the sub-screen 1 and the number of sub-substrate 21 are four.

[0064] In some embodiments, in the first state, the sub-substrate 21 is arranged to overlap with the two edges of the sub-screen 1 at the orthographic projection edge of the sub-screen 1, that is, at least one sub-substrate 21 is arranged corresponding to one corner of the sub-screen 1. This design allows one sub-substrate 21 to simultaneously protect the two edges of the sub-screen 1, further enhancing the splicing reliability of the display module and having strong practicality.

[0065] In some embodiments, the connecting substrate 2 includes a thermal expansion material, and the coefficient of thermal expansion of the connecting substrate 2 is greater than that of the sub-screen 1. That is, when the ambient temperature rises, the connecting substrate 2 will expand, and the expansion rate of the connecting substrate 2 after the temperature rises is greater than that of the sub-screen 1, so that the connecting substrate 2 can protect the sub-screen 1.

[0066] In other embodiments, the connecting substrate 2 includes a cold-expansion material, and the coefficient of cold expansion of the connecting substrate 2 is greater than that of the sub-screen 1. That is, when the ambient temperature decreases, the connecting substrate 2 will expand, and the expansion rate of the connecting substrate 2 after the temperature decreases is greater than that of the sub-screen 1, so that the connecting substrate 2 can protect the sub-screen 1.

[0067] It should be noted that the sub-screen 1 can be made of either a thermally expanding material or a cold-expanding material. This application embodiment does not limit this, as long as the expansion rate of the sub-screen 1 is less than the expansion rate of the connecting substrate 2 when the connecting substrate 2 expands.

[0068] Please see Figure 7 Secondly, this application provides a splicing display screen, including a display module in the second state of any of the aforementioned embodiments, wherein the connecting substrate 2 of adjacent display modules abuts against each other, and the sub-screens 1 of adjacent display modules are spaced apart.

[0069] The splicing display screen includes multiple display modules in a second state. The multiple display modules in the second state abut against each other through the connecting substrate 2, thereby avoiding collision between adjacent sub-screens 1 in adjacent display modules and improving the display effect and yield of the splicing display screen.

[0070] Unlike traditional splicing displays, the splicing display in this embodiment does not require additional alignment marks. It only needs to rely on the expansion and contact of the connecting substrate 2 in the display module to achieve the positioning effect. Therefore, it can avoid collisions between adjacent sub-screens 1 and avoid the impact of alignment marks on the display effect.

[0071] It is understood that, in addition to including multiple display modules, a splicing display screen may also include a base, frame structure or other mechanical structural components for supporting multiple display modules and defining the size of the splicing display screen. This application embodiment does not impose any limitations on this.

[0072] In some embodiments, the sub-screen 1 includes a plurality of pixel units 12, and the distance between adjacent sub-screens 1 is smaller than the size of the pixel unit 12.

[0073] In the splicing display provided in this application embodiment, the sub-screens 1 of adjacent display modules are spaced apart, and the distance between adjacent sub-screens 1 is determined by the expansion rate of the sub-screen 1 and the connecting substrate 2. Therefore, in order to reduce the impact of the gap between adjacent sub-screens 1 on the display effect, this application embodiment sets the distance between adjacent sub-screens 1 to be smaller than the size of the pixel unit 12, wherein the pixel unit 12 is the smallest light-emitting unit for achieving the display effect in the splicing display. By setting the distance between adjacent sub-screens 1 to be smaller than the size of the pixel unit 12, the gap between adjacent sub-screens 1 can be made imperceptible to the human eye, thereby improving the display effect. Optionally, the distance between adjacent sub-screens 1 is not greater than 900μm.

[0074] Please see Figure 8 Thirdly, embodiments of this application provide a display device, including the splicing display screen of any of the foregoing embodiments. It is understood that the display device provided in this application has the beneficial effects of the splicing display screen and display module provided in this application. For details, please refer to the specific descriptions of the splicing display screen and display module in the above embodiments; these will not be repeated here.

[0075] Fourthly, please refer to Figure 9 As shown in Figure 10, this application embodiment provides a method for manufacturing a splicing display screen, including:

[0076] S100 provides multiple display components, including an initial state sub-screen and an initial state connection substrate located on one side of the backlight surface of the initial state sub-screen.

[0077] S110. Process multiple display components under preset environmental conditions to expand the display components to form a display module. The display module includes a final state sub-screen and a final state connecting substrate located on one side of the backlight surface of the final state sub-screen. The ratio of the positive projection area of ​​the final state sub-screen on the final state connecting substrate to the area of ​​the final state connecting substrate is smaller than the ratio of the positive projection area of ​​the initial state sub-screen on the initial state connecting substrate to the area of ​​the initial state connecting substrate.

[0078] S120: Multiple display modules are spliced ​​together by abutting each other with the final state connection substrates of adjacent display modules while maintaining a preset spacing distribution between adjacent final state sub-screens.

[0079] In step S100, the initial state connection substrate 12' is disposed on one side of the backlight surface of the initial state sub-screen 11', and they are interconnected by means of connection terminals or other methods. The initial state connection substrate 12' may include only one substrate or multiple sub-substrates; this embodiment does not impose any limitation on this.

[0080] In step S110, the display component is expanded by changing the environmental conditions, thus transforming it into a display module. During this process, since the expansion rate of the initial state connecting substrate 12' is greater than that of the initial state sub-screen 11', the ratio of the projected area of ​​the final state sub-screen 21' onto the final state connecting substrate 22' to the area of ​​the final state connecting substrate 22' is less than the ratio of the projected area of ​​the initial state sub-screen 11' onto the initial state connecting substrate 12' to the area of ​​the initial state connecting substrate 12'. Therefore, in the display module, the projected area of ​​the final state connecting substrate 22' onto the final state sub-screen 21' can completely cover the edge of the final state sub-screen 21', thereby protecting the final state sub-screen 21'.

[0081] It is understood that the display component in this application embodiment is the display module in the first state of the aforementioned embodiments, and the display module in this application embodiment is the display module in the second state of the aforementioned embodiments.

[0082] In step S120, since the expansion rate of the initial state connecting substrate 12' is greater than that of the initial state sub-screen 11', adjacent final state connecting substrates 22' in adjacent display modules will contact the final state sub-screen 21' first. The final state connecting substrate 22' serves to protect the final state sub-screen 21', and adjacent final state sub-screens 21' are distributed at a preset distance. Optionally, the distance between adjacent final state sub-screens 21' is smaller than the size of the pixel unit, thereby reducing the impact on the display effect.

[0083] In some embodiments, in step S110, the initial-state connection substrate of the display component is expanded by changing the ambient temperature conditions.

[0084] This application controls the expansion of the initial-state interconnect substrate 12' by changing the temperature. Specifically, whether the temperature is increased or decreased depends on the material of the initial-state interconnect substrate 12'. For example, if the initial-state interconnect substrate 12' is made of a thermally expanding material, the temperature needs to be increased to cause the initial-state interconnect substrate 12' to expand; if the initial-state interconnect substrate 12' is made of a cold-expanding material, the temperature needs to be decreased to cause the initial-state interconnect substrate 12' to expand. The embodiments of this application do not limit the material of the initial-state interconnect substrate 12'.

[0085] While the embodiments disclosed in this application are as described above, the content is merely for the purpose of facilitating understanding of this application and is not intended to limit the invention. Any person skilled in the art to which this application pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of protection of this application shall still be determined by the scope defined in the appended claims.

[0086] The above description is merely a specific embodiment of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, substitutions for other connection methods described above can be made by referring to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application.

Claims

1. A display module, characterized in that, The display module includes a sub-screen, multiple signal lines, connection terminals, and a connection substrate located on one side of the backlight surface of the sub-screen. The display module has at least a first state and a second state. The signal lines include a first sub-segment located on one side of the sub-screen and connected to the sub-screen, a second sub-segment located on one side of the backlight surface of the sub-screen, and a connection segment disposed on the outer periphery of the sub-screen for connecting the first sub-segment and the second sub-segment. The connection terminals are used to connect the sub-screen and the connection substrate and are disposed in a way that avoids the second sub-segment. Wherein, the area of ​​the connecting substrate in the second state is greater than the area of ​​the connecting substrate in the first state, and the ratio of the orthographic projection area of ​​the sub-screen on the connecting substrate in the second state to the area of ​​the connecting substrate is less than the ratio of the orthographic projection area of ​​the sub-screen on the connecting substrate to the area of ​​the connecting substrate in the first state. The connecting substrate includes multiple sub-substrates. In the first state, the sub-substrates overlap with at least one edge of the sub-screen at the orthogonal projection edge of the sub-screen. Each sub-screen is provided with respect to the multiple sub-substrates. The connecting terminals are arranged in an array on one side of the backlight surface of the sub-screen, and one connecting terminal is connected to one sub-substrate.

2. The display module according to claim 1, characterized in that, In the second state, the connecting segment is located within the orthographic projection range of the connecting substrate.

3. The display module according to claim 2, characterized in that, In the first state, the connecting segment is located within the orthographic projection range of the connecting substrate.

4. The display module according to claim 1, characterized in that, In the first state, the sub-substrate is disposed with its orthographic projection edge on the sub-screen overlapping with the two edges of the sub-screen.

5. The display module according to claim 1, characterized in that, The connecting substrate includes a thermal expansion material, and the coefficient of thermal expansion of the connecting substrate is greater than the coefficient of thermal expansion of the sub-screen. Alternatively, the connecting substrate may include a cold-expanding material, and the coefficient of cold expansion of the connecting substrate may be greater than that of the sub-screen.

6. A splicing display screen, characterized in that, The display module includes multiple display modules in the second state as described in any one of claims 1 to 5, wherein the connecting substrates of adjacent display modules abut against each other, and the sub-screens of adjacent display modules are spaced apart.

7. The splicing display screen according to claim 6, characterized in that, The sub-screen comprises multiple pixel units, and the distance between adjacent sub-screens is smaller than the size of the pixel unit.

8. The splicing display screen according to claim 6, characterized in that, The distance between adjacent sub-screens is no greater than 900 μm.

9. A display device, characterized in that, Including the splicing display screen as described in any one of claims 6 to 8.

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