A display module, a manufacturing method, and a display device.
By setting an extension at the connection part of the flexible circuit board and limiting and fixing it, the problem of poor molding caused by misalignment and warping in the manufacturing process of OLED display panels is solved, and the bonding accuracy and stability are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BOE TECHNOLOGY GROUP CO LTD
- Filing Date
- 2026-02-28
- Publication Date
- 2026-05-26
AI Technical Summary
OLED display panels are prone to printing defects during the manufacturing process, mainly due to display functionality issues caused by misalignment and warping of the flexible circuit board during bonding.
An extension is provided at the connection part of the flexible circuit board and fixed by a limiting structure to ensure stability during the bonding process and reduce the risk of displacement.
This improves the positional stability and bonding accuracy of flexible circuit boards, prevents poor molding, and increases the bonding yield of display modules.
Smart Images
Figure CN122090723A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of display technology. More specifically, it relates to a display module, a manufacturing method, and a display device. Background Technology
[0002] OLED (Electroluminescent Diode) displays superior performance and are valued by end customers. However, defects such as mold marks can easily occur in the display panel during the OLED manufacturing process. Summary of the Invention
[0003] The purpose of this invention is to provide a display module, a manufacturing method, and a display device to solve at least one of the problems existing in the prior art.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: The first aspect of this invention provides a display module, the display module comprising a display panel and a flexible circuit board. The flexible circuit board includes a first bonding portion at one end, a second bonding portion at the other end, and a connecting portion, wherein the connecting portion includes: a first end portion connecting the first bonding portion, a second end portion connecting the second bonding portion, and opposing first and second side portions; The flexible circuit board further includes an extension portion located at at least one of the first side portion or the second side portion, and the extension portion extends outward from the side portion where the extension portion is located.
[0005] In an optional embodiment, the extension includes: The recessed portion, wherein the recessed structure of the recessed portion extends from the first binding portion toward the second binding portion; and The protrusion extends from the second binding portion toward the first binding portion.
[0006] In an optional embodiment, the extension includes: A plug-in portion is connected to at least one of the first side portion or the second side portion; A snap-fit portion is located on the side of the plug-in portion away from the connecting portion; The projection length of the end of the snap-fit portion near the plug portion on the first side is greater than the projection length of the plug portion on the first side.
[0007] In an optional embodiment, the connecting portion includes: First substrate; The conductive layer located on the first substrate; and The second substrate is located on the side of the conductive layer away from the first substrate. The conductive material layer of the extension is disposed in the same layer as the conductive layer.
[0008] In an optional embodiment, the display module further includes a housing with an opening, in which the display panel is disposed. The shell includes a bottom wall and side walls. The flexible circuit board is in a bent and bonded state, with the first bonding part located at the edge of the display panel on the light-emitting side, and the connecting part bent to the non-light-emitting side of the display panel. The direction from the first binding part to the second binding part is the first direction, and the second direction is the direction from the first side part to the second side part. The first direction and the second direction are perpendicular in the horizontal plane. The bottom wall includes a limiting portion disposed at a position corresponding to the bent extension, the limiting portion limiting the limiting portion in one or more directions including the first direction, the second direction and the third direction.
[0009] In an optional embodiment, the extension and the limiting portion are physically connected and fixed.
[0010] In an optional embodiment, when the extension includes a protrusion and a recess, the limiting portion includes at least two limiting posts located on both sides of the extension, one limiting post corresponding to the protrusion of the protrusion and the other limiting post corresponding to the recess of the recess.
[0011] In an optional embodiment, when the extension includes a plug-in portion and a snap-fit portion, the limiting portion includes a limiting hole located at a corresponding position of the extension, wherein the projection length of the limiting hole on the first side is greater than the projection length of the plug-in portion on the first side and less than the projection length of the snap-fit portion on the first side.
[0012] In an optional embodiment, the conductive material layer of the limiting portion is in contact with the housing.
[0013] A second aspect of the present invention provides a display device, including the display module described in the first aspect of the present invention.
[0014] A third aspect of the present invention provides a method for binding a display module, the method comprising: The display panel is fixed to the mounting fixture; The extension of the flexible circuit board is fixed at the position corresponding to the limiting structure of the binding fixture, and the limiting structure limits the extension in a first direction and / or a second direction. The first binding part is bound to the display panel.
[0015] The beneficial effects of this invention are as follows: The display module described in this embodiment of the invention has an extension portion in the connecting part, which is used to limit the position of the flexible circuit board, thereby improving the positional stability of the flexible circuit board and reducing the risk of displacement of the flexible circuit board. Attached Figure Description
[0016] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
[0017] Figure 1 This diagram illustrates the structure of a display module according to an embodiment of the present invention. Figure 2 A cross-sectional schematic diagram of a display module according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the structure of one embodiment of the extension of this invention is shown; Figure 4 This diagram illustrates the structure of the extension and the housing according to an embodiment of the present invention. Figure 5 This diagram illustrates the structure of another embodiment of the extension of the present invention. Figure 6 This diagram illustrates the structure of the binding fixture according to an embodiment of the present invention. Figure 7 This diagram shows a schematic representation of the extension and housing according to an embodiment of the present invention. Figure 8 This diagram illustrates the structure of another embodiment of the extension of the present invention. Figure 9 and Figure 10 This invention illustrates an embodiment of the invention. Figure 7 A schematic diagram of the extension and the shell structure; Figure 11 A schematic diagram of the layer structure of the extension portion according to an embodiment of the present invention is shown. Detailed Implementation
[0018] To more clearly illustrate the present invention, the following description, in conjunction with embodiments and accompanying drawings, further explains the invention. Similar components in the drawings are indicated by the same reference numerals. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of the present invention.
[0019] Based on the molding defects that occur in the display panels during the OLED manufacturing process, the inventors, based on the production line process and after disassembling and testing the defective display modules, found that the molding defects mostly occur at the corresponding locations on the flexible printed circuit board (FPC) and after the process of reliability testing.
[0020] Based on the above findings, the inventors conducted further experiments and research, proposing that the causes of mold defects are: misalignment of the flexible circuit board leading to display functionality problems and the flexible circuit board lifting during reliability tests such as drop tests. For example, during the bonding process between the flexible circuit board and the display panel, the flexible circuit board may wobble due to inertia, resulting in misalignment after bonding and assembly; another example is that during the assembly process between the flexible circuit board and the connector, the flexible circuit board is easily deformed and lifted; yet another example is that during reliability tests such as drop tests, the flexible circuit board may wobble, causing the display panel to be ejected from the mold.
[0021] In view of this, the present invention proposes a display module, a manufacturing method, and a display device to solve one or more of the above problems.
[0022] The first embodiment of the present invention provides a display module, such as... Figure 1 and Figure 2 As shown, the display module includes a display panel 10 and a flexible circuit board 20. The flexible circuit board 20 includes a first binding portion 21 at one end, a second binding portion 23 at the other end, and a connecting portion 22. The connecting portion 22 includes a first end portion connecting the first binding portion 21, a second end portion connecting the second binding portion 23, and opposing first and second side portions 221 and 222. The flexible circuit board 20 further includes an extension 24, which is located on at least one of the first side portion 221 or the second side portion 222, and the extension direction of the extension 24 is such that the side portion where the extension 24 is located extends outward from the connecting portion 22.
[0023] The display module described in this embodiment of the invention has an extension 24 provided in the connecting part 22. The extension 24 is used to limit the position of the flexible circuit board 20, thereby improving the positional stability of the flexible circuit board 20 and reducing the risk of displacement of the flexible circuit board 20.
[0024] In an optional embodiment, such as Figure 3 As shown, the binding fixture 40 that fixes the flexible circuit board 20 has a limiting structure 41 for fixing the extension 24. The limiting structure 41 limits the flexible circuit board 20 in the direction of the first binding part 21 and the second binding part 23 and / or in the direction of the first side part 221 and the second side part 222.
[0025] In an optional embodiment, such as Figure 2 As shown, the display module also includes a housing 30 with an opening, and the display panel 10 is disposed in the opening. The housing 30 includes a bottom wall 32 and a side wall 31. When the flexible circuit board 20 is in a bent and bonded state, the first bonding part 21 is located at the edge of the display panel 10 on the light-emitting side, and the connecting part 22 is bent to the non-light-emitting side of the display panel 10. The bottom wall 32 includes a limiting part 321 disposed at a position corresponding to the bent extension 24, the limiting part 321 limiting the limiting part 321 in one or more directions of the first direction, the second direction and the third direction.
[0026] like Figure 2 As shown, when the bonded display panel 10 and flexible circuit board 20 are assembled into the housing 30, the first direction is the direction from the first bonding portion 21 to the second bonding portion 23, and the second direction is the direction from the first side portion 221 to the second side portion 222, that is... Figure 2 The direction shown is perpendicular to the paper, pointing inwards or outwards. A third direction is perpendicular to both the first and second directions, respectively. Figure 2 As shown, the third direction is the vertical direction of the vertical sidewall 31. The limiting part 321 of the bottom wall 32 of the housing 30 can limit the flexible circuit board 20 in different directions, so as to avoid the flexible circuit board 20 from shifting and causing the display panel 10 to be pushed out of the housing 30 in subsequent manufacturing processes, resulting in poor molding.
[0027] The present invention has different embodiments of the extension 24. In an optional embodiment, such as Figure 3 As shown, the extension 24 is a strip-shaped structure that extends from the side where the extension 24 is located toward the outside of the connecting portion 22.
[0028] Correspondingly, the limiting structure 41 includes a first fixture groove opened at the corresponding position of the binding fixture 40 on the strip structure, and the shape of the first fixture groove is set to match the shape of the strip structure.
[0029] In this embodiment, as Figure 3 As shown, the direction from the first binding part 21 to the second binding part 23 is the first direction, and the second direction is the direction from the first side part 221 to the second side part 222. The first direction and the second direction are perpendicular in the horizontal plane.
[0030] During bonding, the extension 24 is engaged in the first fixture slot of the bonding fixture 40. Based on this setting, the flexible circuit board 20 is limited in the first and second directions. Then, the first bonding part 21 and the display panel 10 are pressed together to achieve bonding between the flexible circuit board 20 and the display panel 10. With this setting, the flexible circuit board 20 will not shift after being limited during the bonding process, which can improve the bonding accuracy of the flexible circuit board 20, improve the bonding yield of the flexible circuit board 20, and prevent display defects caused by the misalignment of the flexible circuit board 20.
[0031] In an optional embodiment, the extension 24 and the limiting portion 321 are physically connected and fixed, for example, as shown in... Figure 4 As shown, both the extension portion 24 and the limiting portion 321 have threaded holes. The extension portion 24 and the connecting portion 22 are fixed by screws, which can effectively improve the poor molding caused by deformation and warping stress in reliability tests such as drop tests of the flexible circuit board 20. This design can also eliminate the double-sided adhesive structure for bonding the flexible circuit board 20, reducing production costs.
[0032] In an optional embodiment, such as Figure 5 As shown, the extension 24 includes: Recessed portion 241, the recessed structure of said recessed portion 241 extending from the first binding portion 21 toward the second binding portion 23; and The protrusion 242 extends from the second binding portion 23 toward the first binding portion 21.
[0033] In this embodiment, the extension 24 is designed with an arc shape, forming a wave-shaped extension 24. The distance between the recessed portion 241 and the second binding portion 23 in the first direction is different from the distance between the protruding portion 242 and the second binding portion 23 in the first direction; the distance between the recessed portion 241 and the second side portion 222 in the second direction is different from the distance between the protruding portion 242 and the second side portion 222 in the second direction. Through this setting, the positioning effect of the extension 24 in the first and second directions is increased, further improving the stability of the flexible circuit board 20.
[0034] In the structure where the extension 24 includes a recess 241 and a protrusion 242, as Figure 6 As shown, the limiting structure 41 of the binding fixture 40 includes positioning posts 412 opened at corresponding positions of the recessed portion 241 and the protruding portion 242, one positioning post 412 corresponding to the protruding position of the protruding portion 242, and the other positioning post 412 corresponding to the recessed position of the recessed portion 241.
[0035] During bonding, the extension 24 is positioned between the two positioning posts 412 of the bonding fixture 40. Based on this setting, the flexible circuit board 20 is limited in the first and second directions. Then, the first bonding part 21 and the display panel 10 are pressed together to achieve bonding between the flexible circuit board 20 and the display panel 10. With this setting, the flexible circuit board 20 will not shift after being limited during the bonding process, which can improve the bonding accuracy of the flexible circuit board 20, improve the bonding yield of the flexible circuit board 20, and prevent display defects caused by the misalignment of the flexible circuit board 20.
[0036] In an optional embodiment, such as Figure 7 And reference Figure 6 When the extension 24 shown includes a protrusion 242 and a recess 241, the limiting part 321 includes at least two limiting posts 3211 located on both sides of the extension 24, one limiting post 3211 corresponding to the protrusion position of the protrusion 242 and the other limiting post 3211 corresponding to the recess position of the recess 241.
[0037] In this embodiment, the extension 24 is limited by the limiting post 3211 structure provided on the housing 30 through the structural design of the housing 30. The extension 24 is locked between the two limiting posts 3211. The limiting post 3211 corresponding to the recessed part 241 and the limiting post 3211 corresponding to the protruding part 242 limit the flexible circuit board 20 in the first direction and the second direction. This can position the assembly position of the flexible circuit board 20 and fix the flexible circuit board 20, preventing the flexible circuit board 20 from being deformed and warped due to stress during reliability tests such as drop tests.
[0038] In an optional embodiment, such as Figure 8 As shown, the extension 24 includes: The plug portion 243 is connected to at least one of the first side portion 221 or the second side portion 222; The snap-fit portion 244 is located on the side of the plug-in portion 243 away from the connecting portion 22; The projection length of the end of the snap-fit portion 244 near the plug portion 243 on the first side portion 221 is greater than the projection length of the plug portion 243 on the first side portion 221.
[0039] In this embodiment, the extension 24 is designed with a barb shape, forming an extension 24 with a larger volume at the end edge and a smaller volume in the middle. In the first direction from the first binding part 21 to the second binding part 23, the length of the plug-in part 243 in the first direction is less than the length of the end of the snap-fit part 244 near the plug-in part 243 in the first direction. That is, there is a discontinuity at the junction of the snap-fit part 244 and the plug-in part 243. Through this structure, the positioning strength of the extension 24 in the first and second directions is increased, and the stability of the flexible circuit board 20 is further improved.
[0040] In the structure where the extension 24 includes a plug-in portion 243 and a snap-fit portion 244, as follows: Figure 8As shown, the limiting structure 41 of the binding fixture 40 includes a second fixture groove 413 opened at the corresponding positions of the insertion part 243 and the snap-fit part 244. During binding, the insertion part 243 and the snap-fit part 244 are respectively fixed at the corresponding positions of the second fixture groove 413. Based on this setting, the flexible circuit board 20 is limited in the first direction and the second direction. Then, the first binding part 21 and the display panel 10 are pressed and attached to achieve the binding of the flexible circuit board 20 and the display panel 10. Through this setting, the flexible circuit board 20 will not be offset after being limited during the binding process, which can improve the binding accuracy of the flexible circuit board 20, improve the binding yield of the flexible circuit board 20, and prevent display defects caused by the misalignment of the flexible circuit board 20.
[0041] In an optional embodiment, when the extension 24 includes a plug-in portion 243 and a snap-fit portion 244, such as Figure 9 9a, 9b and Figure 10 As shown, the limiting part 321 includes a limiting hole 3212 located at the corresponding position of the extension part 24. The projection length of the limiting hole 3212 on the first side part 221 is greater than the projection length of the insertion part 243 on the first side part 221, and less than the projection length of the snap-fit part 244 on the first side part 221.
[0042] In an optional embodiment, such as Figure 9 In Figure 9 As shown in b, the boundary of the limiting hole 3212 on the side closer to the connecting part 22 is closer to the connecting part 22 than the boundary between the snap-fit part 244 and the insertion part 243, and the boundary of the limiting hole 3212 on the side away from the connecting part 22 is closer to the connecting part 22 than the end boundary of the snap-fit part 244 away from the insertion part 243.
[0043] That is, the boundary of the limiting hole 3212 near the connecting part 22 forms an abutment structure with the boundary of the snap-fit part 244 and the insertion part 243, so as to prevent the snap-fit part 244 from being unable to be fully inserted into the limiting hole 3212; the boundary of the limiting hole 3212 away from the connecting part 22 forms a limiting structure with the boundary of the snap-fit part 244, so as to prevent the snap-fit part 244 from coming out of the limiting hole 3212 in the third direction. Through the above structural design of the limiting hole 3212 and the extension part 244, the limiting function of the limiting hole 3212 on the extension part 244 is guaranteed.
[0044] In an optional embodiment, a portion of the insertion part 243 is located on the surface of the bottom wall 32 near the display panel 10, and the portion of the insertion part 243 extends into the limiting hole 3212. The snap-fit part 244 is located on the surface of the bottom wall 32 away from the display panel 10. The limiting hole 3212 enables the extension part 24 to be jointly limited in the first direction, the second direction and the third direction of the display panel 10. In this embodiment, the hardness of the housing 30 is greater than that of the snap-fit part 244. Therefore, under this design, the material of the snap-fit part 244 is relatively soft. Under the application of external force, the snap-fit part 244 can be inserted into the limiting hole 3212 after deformation. It can then restore its original structure within the limiting hole 3212. Therefore, the snap-fit part 244 cannot be detached after being inserted into the limiting hole 3212. This will limit the flexible circuit board 20 in the first, second, and third directions, and can also fix the flexible circuit board 20 to prevent poor molding caused by deformation and warping during reliability tests such as drop tests.
[0045] In an optional embodiment, such as Figure 1 As shown, extensions 24 are respectively provided on the first side 221 and the second side 222. For example, the number of extensions 24 provided on the first side 221 and the second side 222 may be the same or different. Those skilled in the art design according to the dimensions of the connecting part 22 in the first direction in actual applications. Similarly, Figure 3 , Figure 5 , Figure 8 and Figure 9 In the structure shown, the number of extensions 24 on each side can still be designed according to the actual application.
[0046] In an optional embodiment, the extension 24 located on the first side 221 and the extension 24 located on the second side 222 are staggered in a first direction, thereby improving the overall stability of the flexible circuit board by utilizing the staggered arrangement of the extensions 24.
[0047] In an optional embodiment, such as Figure 11 As shown, the connecting part 22 includes: First substrate 225; The conductive layer 226 located on the first substrate 225; and The second substrate 227 is located on the side of the conductive layer 226 away from the first substrate 225. The conductive material layer 2426 of the extension 24 is disposed in the same layer as the conductive layer 226.
[0048] In other words, the thickness of the extension 24 in this embodiment is less than the thickness of the connecting portion 22. The extension 24 is a single-layer material, while the connecting portion 22 is a multi-layer material. The conductive layer 226 of the extension 24 is used to form conductive traces. The conductive material layer 2426 of the extension 24 and the conductive layer 226 are the same layer. By reusing the conductive layer 226, the manufacturing efficiency of the flexible circuit board 20 is improved.
[0049] In an optional embodiment, the conductive material layer 2426 of the limiting part 321 is in contact with the housing 30. That is, this embodiment adopts a scheme in which conductive material is exposed on both sides of the extension part 24. After the extension part 24 and the housing 30 are in contact, it can play a grounding role and enhance the ESD resistance of the display panel 10.
[0050] Another embodiment of the present invention provides a display device, which includes the display module of the above embodiments of the present invention. In this embodiment, the display device can be any product or component with display function, such as electronic paper, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator, and this embodiment does not limit it.
[0051] Another embodiment of the present invention provides a method for binding a display module, the method comprising: The display panel 10 is fixed to the binding fixture 40; The extension 24 of the flexible circuit board 20 is fixed at the position corresponding to the limiting structure 41 of the binding fixture 40, and the limiting structure 41 limits the extension 24 in the first direction and / or the second direction. The first binding part 21 is bound to the display panel 10.
[0052] based on Figure 3 , Figure 6 and Figure 8 The different limiting structures 41 of the binding fixture 40 shown correspond to the structures of the extension 24 in different embodiments. The binding fixture 40 and the extension 24 are designed to work together to improve the positioning accuracy of the flexible circuit board 20 during the binding process. The binding fixture 40 is used to fix the flexible circuit board 20 in the first direction and the second direction, thereby improving the assembly accuracy of the first binding part 21 and the display panel.
[0053] It is worth noting that specific embodiments of the bonding method for the display module in this invention can be found in the bonding method of the display panel and flexible circuit board 20 in the foregoing embodiments, and will not be repeated here.
[0054] In the description of this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying 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 limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.
Claims
1. A display module, characterized in that, The display module includes a display panel and a flexible circuit board. The flexible circuit board includes a first bonding portion at one end, a second bonding portion at the other end, and a connecting portion, wherein the connecting portion includes: a first end portion connecting the first bonding portion, a second end portion connecting the second bonding portion, and opposing first and second side portions; The flexible circuit board further includes an extension portion located at at least one of the first side portion or the second side portion, and the extension portion extends outward from the side portion where the extension portion is located.
2. The display module according to claim 1, characterized in that, The extension includes: The recessed portion, wherein the recessed structure of the recessed portion extends from the first binding portion toward the second binding portion; and The protrusion extends from the second binding portion toward the first binding portion.
3. The display module according to claim 1, characterized in that, The extension includes: A plug-in portion is connected to at least one of the first side portion or the second side portion; A snap-fit portion is located on the side of the plug-in portion away from the connecting portion; The projection length of the end of the snap-fit portion near the plug portion on the first side is greater than the projection length of the plug portion on the first side.
4. The display module according to any one of claims 1 to 3, wherein the connecting portion comprises: First substrate; The conductive layer located on the first substrate; and The second substrate is located on the side of the conductive layer away from the first substrate. The conductive material layer of the extension is disposed in the same layer as the conductive layer.
5. The display module according to claim 4, characterized in that, The display module also includes a housing with an opening, and the display panel is disposed in the opening. The shell includes a bottom wall and side walls. The flexible circuit board is in a bent and bonded state, with the first bonding part located at the edge of the display panel on the light-emitting side, and the connecting part bent to the non-light-emitting side of the display panel. The direction from the first binding part to the second binding part is the first direction, and the second direction is the direction from the first side part to the second side part. The first direction and the second direction are perpendicular in the horizontal plane. The bottom wall includes a limiting portion disposed at a position corresponding to the bent extension, the limiting portion limiting the limiting portion in one or more directions including the first direction, the second direction and the third direction.
6. The display module according to claim 5, characterized in that, The extension and the limiting part are physically connected and fixed.
7. The display module according to claim 5, characterized in that, When the extension includes a protrusion and a recess, the limiting portion includes at least two limiting posts located on both sides of the extension, one limiting post corresponding to the protrusion of the protrusion and the other limiting post corresponding to the recess of the recess.
8. The display module according to claim 5, characterized in that, When the extension includes a plug-in portion and a snap-fit portion, the limiting portion includes a limiting hole located at the corresponding position of the extension. The projection length of the limiting hole on the first side is greater than the projection length of the plug-in portion on the first side and less than the projection length of the snap-fit portion on the first side.
9. The display module according to claim 5, characterized in that, The conductive material layer of the limiting part is in contact with the housing.
10. A display device, characterized in that, The display device includes the display module according to any one of claims 1 to 9.
11. A method for binding a display module, characterized in that, The method includes: The display panel is then fixed to the mounting fixture; The extension of the flexible circuit board is fixed at the position corresponding to the limiting structure of the binding fixture, and the limiting structure limits the extension in a first direction and / or a second direction. The first binding part is bound to the display panel.