Display module, method for manufacturing display module, and display device

Abstract

The application relates to the technical field of display, in particular to a display module, a preparation method of the display module and a display device, and solves the problem that it is difficult to realize the narrow frame effect of the display device. The display module comprises a flexible screen body, an arc-shaped bending area and a non-bending area; a support layer is arranged in a stack mode with the non-bending area, and the bending direction of the arc-shaped bending area is towards the support layer; the support layer comprises a center area and an edge area close to the arc-shaped bending area; the thickness of the center area is smaller than that of the edge area; a bonding layer is arranged on the side surface of the support layer away from the flexible screen body; the bonding layer comprises a first area and a second area; the first area corresponds to the center area; the second area corresponds to the edge area; the thickness of the first area is greater than that of the second area.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display module, a method for manufacturing the display module, and a display device. Background Technology

[0002] With the development of display technology, display panels are being used more and more widely, and the requirements for narrow bezels are becoming increasingly stringent. To achieve a narrow bezel effect, the non-display area of ​​the flexible screen is typically bent to the back of the display panel, using the smallest possible bending radius. However, the support layer used to support the flexible screen is prone to separating from the adhesive layer near the bending point, resulting in a larger bending radius and making it difficult to achieve a narrow bezel effect. Summary of the Invention

[0003] In view of this, the present application provides a display module and a method for manufacturing the display module, as well as a display device, which solves the problem of difficulty in achieving a narrow bezel effect in the display device.

[0004] In a first aspect, an embodiment of this application provides a display module comprising: a flexible screen body, including an arc-shaped bending area and a non-bending area; a support layer, stacked with the non-bending area, wherein the bending direction of the arc-shaped bending area faces the support layer, the support layer including a central area and an edge area near the arc-shaped bending area, the thickness of the central area being less than the thickness of the edge area; and an adhesive layer disposed on the side surface of the support layer away from the flexible screen body, the adhesive layer including a first area and a second area, the first area corresponding to the central area and the second area corresponding to the edge area, the thickness of the first area being greater than the thickness of the second area.

[0005] Warping at the edges of the support layer can cause separation between the edge region and the second region of the adhesive layer. By making the thickness of the central region of the support layer less than the thickness of the edge region, the stiffness of the edge region is increased, reducing warping and allowing for better adhesion between the edge region and the second region of the adhesive layer. Simultaneously, making the thickness of the first region greater than the thickness of the second region ensures that the sum of the thickness of the central region and the first region is approximately equal to the sum of the thicknesses of the edge region and the second region. This prevents the bending radius of the curved bending area from becoming excessive, thus achieving a narrow bezel effect in the display device, including the display module.

[0006] In conjunction with the first aspect, in one embodiment of this application, the sum of the thickness of the central region and the thickness of the first region is equal to the sum of the thickness of the edge region and the thickness of the second region, ensuring that the overall film thickness of the display module remains unchanged, thereby ensuring that the bending radius of the arc bending area remains unchanged, and thus achieving the effect of the narrowest bezel.

[0007] In conjunction with the first aspect, in one embodiment of this application, the thickness of the edge region gradually increases and the thickness of the second region gradually decreases in a first direction, where the first direction is the direction from the center region to the edge region. By gradually increasing the thickness of the edge region and gradually decreasing the thickness of the second region, the contact area between the edge region and the second region is increased, the adhesion between the edge region and the second region is improved, and the separation problem between the edge region and the second region is further reduced.

[0008] In conjunction with the first aspect, in one embodiment of this application, the edge region includes a first concave-convex structure, and the second region includes a second concave-convex structure that mates with the first concave-convex structure. By providing the first and second concave-convex structures, and by having the first and second concave-convex structures mate with each other, the contact area between the edge region and the second region is further increased, the adhesion between the edge region and the second region is improved, and the separation problem between the edge region and the second region is reduced.

[0009] In conjunction with the first aspect, in one embodiment of this application, the material of the second region is photosensitive adhesive. After curing, the photosensitive adhesive has high hardness and will not deform due to the warping of the edge region of the support layer. That is, the second region of the adhesive layer will not be stretched due to the warping of the edge region of the support layer; instead, it will bond together with the edge region of the support layer through the adhesive force of the photosensitive adhesive, reducing the warping problem of the edge region of the support layer and thus allowing the edge region to better adhere to the second region of the adhesive layer.

[0010] In conjunction with the first aspect, in one embodiment of this application, the material of the first region is different from that of the second region, thereby allowing the first region to be fabricated using cheaper materials, thus reducing the cost of the display module.

[0011] Secondly, an embodiment of this application provides a method for manufacturing a display module, comprising: providing a flexible screen and a support layer, the flexible screen including a flat region, a region to be bent, and a non-bending region connected in sequence; the support layer being stacked with the non-bending region, the support layer including a central region and an edge region, the thickness of the central region being less than the thickness of the edge region; forming an adhesive layer on the surface of the flat region near the support layer, the adhesive layer including a first region and a second region, the thickness of the first region being greater than the thickness of the second region, the first region corresponding to the central region, and the second region corresponding to the edge region; bending the flexible screen along a bending direction to form a bending region, the bending direction being towards the support layer; and bonding the surface of the support layer away from the flexible screen to the adhesive layer. By making the thickness of the central region of the support layer less than the thickness of the edge region, the stiffness of the edge region of the support layer is increased, the warping problem of the edge region of the support layer is reduced, thereby allowing the edge region to better fit with the second region of the adhesive layer. At the same time, the thickness of the first region is made greater than the thickness of the second region, so that the sum of the thickness of the central region and the thickness of the first region is basically equal to the sum of the thickness of the edge region and the thickness of the second region, thereby ensuring that the bending radius of the arc-shaped bending area is not too large, thus achieving the narrow bezel effect of the display device including the display module.

[0012] In conjunction with the second aspect, in one embodiment of this application, before bonding the side of the support layer away from the flexible screen to the adhesive layer, the sum of the thickness of the central region and the thickness of the first region is less than the sum of the thickness of the edge region and the thickness of the second region. Bonding the side of the support layer away from the flexible screen to the adhesive layer includes: using pressure to press the side of the support layer away from the flexible screen to the adhesive layer so that the sum of the thickness of the central region and the thickness of the first region equals the sum of the thickness of the edge region and the thickness of the second region. In other words, before pressing the side of the support layer away from the flexible screen to the adhesive layer, the total thickness of the edge region and the second region is greater than the total thickness of the central region and the first region. Then, through pressing, the total thickness of the edge region and the second region is reduced, thereby increasing the bonding force between the edge region and the second region.

[0013] In conjunction with the second aspect, in one embodiment of this application, the material of the second region is photosensitive adhesive. After the surface of the support layer away from the flexible screen is bonded to the adhesive layer, the preparation method further includes: curing the second region using ultraviolet light. Curing the second region using ultraviolet light can harden the photosensitive adhesive in the second region, reducing the problem of the second region warping upwards due to deformation caused by edge warping.

[0014] Secondly, an embodiment of this application provides a display device including: the display module mentioned in the first aspect.

[0015] This application provides a display module, a method for manufacturing the display module, and a display device. By making the thickness of the central region of the support layer less than the thickness of the edge region, the rigidity of the edge region of the support layer is increased, and the warping problem of the edge region of the support layer is reduced, thereby allowing the edge region to better adhere to the second region of the adhesive layer. At the same time, the thickness of the first region is greater than the thickness of the second region, so that the sum of the thickness of the central region and the thickness of the first region is approximately equal to the sum of the thickness of the edge region and the thickness of the second region, thereby ensuring that the bending radius of the arc-shaped bending area is not too large, thus achieving a narrow bezel effect in the display device including the display module. Attached Figure Description

[0016] Figure 1 The diagram shown is a structural schematic of a display module.

[0017] Figure 2 The diagram shown is a structural schematic of a display module provided in an embodiment of this application.

[0018] Figure 3 The diagram shown is a structural schematic of a display module provided in another embodiment of this application.

[0019] Figure 4 The diagram shown is a structural schematic of a display module provided in another embodiment of this application.

[0020] Figure 5 The diagram shown is a structural schematic of a display module provided in another embodiment of this application.

[0021] Figure 6 The diagram shown is a structural schematic of a display module provided in another embodiment of this application.

[0022] Figure 7 The diagram shown is a structural schematic of a display module provided in another embodiment of this application.

[0023] Figure 8 The diagram shown is a structural schematic of a display module provided in another embodiment of this application.

[0024] Figure 9 The diagram shown is a structural schematic of a display module provided in another embodiment of this application.

[0025] Figure 10 The diagram shown is a structural schematic of a display module provided in another embodiment of this application.

[0026] Figure 11 The diagram shown is a flowchart illustrating a method for fabricating a display module according to an embodiment of this application.

[0027] Figure 12The diagram shown is a structural schematic of a flexible screen and a support layer provided in an embodiment of this application.

[0028] Figure 13 The diagram shown is a schematic diagram of the structure after an adhesive layer is formed on the side surface of the flat area near the support layer, according to an embodiment of this application.

[0029] Figure 14 The diagram shown is a schematic diagram of the structure of a flexible screen after bending, according to an embodiment of this application.

[0030] Figure 15 The diagram shown is a schematic diagram of the structure after the surface of the support layer away from the flexible screen body is bonded to the adhesive layer according to an embodiment of this application.

[0031] Figure 16 The diagram shown is a structural schematic of a flexible screen and a support layer provided in another embodiment of this application.

[0032] Figure 17 The diagram shown is a structural schematic of a flat region near the support layer after an adhesive layer has been formed, according to another embodiment of this application.

[0033] Figure 18 The diagram shown is a structural schematic of a flexible screen after bending, according to another embodiment of this application.

[0034] Figure 19 The diagram shown is a structural schematic of another embodiment of this application, in which the surface of the support layer away from the flexible screen is bonded to the adhesive layer. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0036] In the manufacturing process of display devices, in order to achieve a narrow bezel effect, the flexible screen body can usually be bent. The end of the flexible screen body with the connecting terminal is bent to the back of the flat area (i.e., the non-bent area), forming a bent area connected to the flat area, thereby reducing the bezel width of the display device.

[0037] Figure 1 The diagram shown is a structural schematic of a display module. Figure 1As shown, the display module includes a flexible screen 11, a first support layer 12, and an adhesive layer 13. The flexible screen 11 includes an arc-shaped bending area 111, a first non-bending area 112, and a second non-bending area 113. The first support layer 12 is stacked on top of the first non-bending area 112, and the bending direction of the arc-shaped bending area 111 faces the first support layer 12. In practical applications, to support the bent flexible screen 11, the display module also includes a stacked padding layer 14, a double-sided adhesive layer 15, a composite tape layer 16, and a second support layer 17. The padding layer 14 is disposed on the side of the adhesive layer 13 away from the first support layer 12. The second support layer 17 is attached to the second non-bending area 113. The second non-bending area 113 can be the display area of ​​the flexible screen 11, and the arc-shaped bending area 111 can also be the display area of ​​the flexible screen 11. The first non-bending area 112 can include a partial display area and a partial non-display area. To protect the curved bending area 111 of the flexible screen 11, the display module also includes a protective layer 18. The protective layer 18 can be a film layer formed by applying adhesive.

[0038] The first support layer 12 is mainly used to protect the first non-bending area 112 of the flexible screen 11; therefore, the first support layer 12 corresponds to the first non-bending area 112 of the flexible screen. The protective layer 18 is mainly used to protect the arc-shaped bending area 111 of the flexible screen 11; therefore, the protective layer 18 corresponds to the arc-shaped bending area 111 of the flexible screen 11. To better protect the flexible screen 11, the protective layer 18 can extend to the first non-bending area 112 and the second non-bending area 113.

[0039] The edge of the first support layer 12 is easily separated from the adhesive layer 13. For example... Figure 1 As shown, the edge of the first support layer 12 warps in the Y direction (i.e., the edge of the first support layer 12 separates from the adhesive layer 13), which increases the bending radius R1 in the Y direction. In order to ensure that the flexible screen body 11 is not damaged during bending, the bending radius R2 in the X direction will also increase, thereby increasing the width B of the bezel and making it difficult to achieve the effect of a narrow bezel.

[0040] The applicant's research found that there are two main reasons for the separation of the edge of the first support layer 12 from the adhesive layer 13.

[0041] (1) During the process of pressing the first support layer 12 and the adhesive layer 13 together using the pressure-holding head 19, it is necessary to control the positional accuracy of the pressure-holding head 19 so that it presses as close as possible to the edge of the first support layer 12 near the arc-shaped bending area 111. However, in order to ensure that the arc-shaped bending area 111 of the flexible screen body 11 is not damaged, it is necessary to control the pressure-holding head 19 from pressing the arc-shaped bending area 111, that is, to control the distance D between the pressure-holding head 19 and the arc-shaped bending area 111. Therefore, the pressure-holding head 19 may not be able to press the edge of the first support layer 12, causing the edge of the first support layer 12 to separate from the adhesive layer 13.

[0042] (2) The adhesive force of the adhesive layer 13 is limited. If the adhesive force is less than the stress generated by the edge warping of the first support layer 12, the adhesive layer 13 cannot bond with the edge of the first support layer 12, resulting in the edge of the first support layer 12 separating from the adhesive layer 13.

[0043] In view of this, this application provides a display module. Figure 2 The diagram shown is a structural schematic of a display module according to an embodiment of this application. Figure 2 As shown, the display module includes a flexible screen 21, a support layer 22, and an adhesive layer 23.

[0044] Specifically, the flexible screen 21 includes an arc-shaped bending area 211 and a non-bending area 212. A support layer 22 is stacked on top of the non-bending area 212, and the bending direction of the arc-shaped bending area 211 faces the support layer 22. The support layer 22 includes a central region 221 and an edge region 222 near the arc-shaped bending area 211. Figure 2 As shown, the thickness of the central region 221 is less than the thickness of the edge region 222. An adhesive layer 23 is disposed on the surface of the support layer 22 away from the flexible screen 21. The adhesive layer 23 includes a first region 231 and a second region 232. Figure 2 As shown, the first region 231 corresponds to the central region 221, and the second region 232 corresponds to the edge region 222. The thickness of the first region 231 is greater than the thickness of the second region 232.

[0045] In practical applications, the display module may not include... Figure 2 As shown in the raised structure 24, the flat area 213 of the flexible screen 21 can be directly bonded to the side surface of the adhesive layer 23 away from the support layer 22.

[0046] In practical applications, such as Figure 2 As shown, the display module may not include... Figure 2 The raised structure 24 and the flat area 213 are shown. The non-bending area 212 can be the display area of ​​the flexible screen 21, and the curved bending area 211 can include part of the display area and part of the non-display area of ​​the flexible screen 21. The area of ​​the curved bending area 211 away from the non-bending area 212 can be directly bonded to the adhesive layer 23.

[0047] In practical applications, such as Figure 2As shown, the display module may further include a raised structure 24. The flexible screen 21 may further include a flat area 213. One side surface of the raised structure 24 is bonded to the adhesive layer 23, and the other side surface of the raised structure 24 is bonded to the flat area 213. The flat area 213 may be the display area of ​​the flexible screen 21. The curved bending area 211 may be the display area of ​​the flexible screen 21 or a non-display area of ​​the flexible screen 21. The non-bending area 212 may include the non-display area and part of the display area of ​​the flexible screen 21, or may only include the non-display area. The raised structure 24 may be formed by stacked raised layers, double-sided adhesive layers, composite tape layers, etc. The double-sided adhesive layers and composite tape layers may both be made of adhesive materials. The raised layers may be made of PET.

[0048] The support layer 22 can be made of polyethylene terephthalate (PET). The support layer 22 can be bonded to the flexible screen 21 using an adhesive material. The adhesive layer 23 can be made of an adhesive material, such as polyimide (PI).

[0049] In one embodiment, such as Figure 3 As shown, the material of the second region 232 of the adhesive layer 23 can be a photosensitive adhesive, also known as an ultraviolet (UV) curable adhesive. Photosensitive adhesives have strong adhesion, enabling them to bond better to the edge region 222 of the support layer 22. Under ultraviolet light irradiation, the photoinitiator (or photosensitizer) in the photosensitive adhesive absorbs ultraviolet light and then generates active free radicals or cations, initiating monomer polymerization and cross-linking chemical reactions, causing the photosensitive adhesive to transform from a liquid to a solid state within seconds. After solidification, the photosensitive adhesive has higher hardness compared to other types of adhesives and will not deform due to the warping of the edge region 222 of the support layer 22. That is, the second region 232 of the adhesive layer 23 will not be stretched due to the warping of the edge region 222 of the support layer 22; instead, it will bond together with the edge region 222 of the support layer 22 through the adhesive force of the photosensitive adhesive, reducing the warping problem of the edge region 222 of the support layer 22, thereby allowing the edge region 222 to better adhere to the second region 232 of the adhesive layer 23.

[0050] In one embodiment, such as Figure 3 As shown, the material of the first region 231 is different from the material of the second region 232. For example, the material of the second region 232 can be photosensitive adhesive, while the material of the first region 231 can be a general adhesive material, such as PI. By making the material of the first region different from the material of the second region, the first region can be fabricated using cheaper materials, reducing the cost of the display module.

[0051] By making the thickness of the central region 221 of the support layer 22 less than the thickness of the edge region 222, the stiffness of the edge region 222 of the support layer 22 is increased, reducing the warping problem of the edge region 222 of the support layer 22, thereby allowing the edge region 222 to better fit with the second region 232 of the adhesive layer 23. At the same time, by making the thickness of the first region 231 greater than the thickness of the second region 232, the sum of the thickness of the central region 231 and the thickness of the first region 231 is approximately equal to the sum of the thickness of the edge region 222 and the thickness of the second region 232. This ensures that the bending radius R1 of the arc-shaped bending area 211 in the Y direction is not too large, and thus ensures that the bending radius R2 of the arc-shaped bending area 211 in the X direction is not too large, achieving a narrow bezel effect for the display device including the display module.

[0052] In one embodiment of this application, the sum of the thickness of the central region 221 and the thickness of the first region 231 is equal to the sum of the thickness of the edge region 222 and the thickness of the second region 232. This ensures that the overall film thickness of the display module remains constant, thereby ensuring that the bending radii R1 and R2 of the arc-shaped bending area 211 remain unchanged. That is, theoretically, bending can be performed with the minimum bending radius, thus achieving the effect of the narrowest bezel. In practical applications, due to manufacturing errors, the sum of the thickness of the central region 221 and the thickness of the first region 231 may differ slightly from the sum of the thickness of the edge region 222 and the thickness of the second region 232. The effect of the narrowest bezel can be achieved by improving the manufacturing precision.

[0053] Figure 4 The diagram shown is a structural schematic of a display module according to another embodiment of this application. Figure 4 As shown, in the first direction (i.e., the X direction), the thickness of the edge region 222 gradually increases, while the thickness of the second region 232 gradually decreases. That is, the surface of the edge region 222 near the second region 232 is a slope, and the surface of the second region 232 near the edge region 222 is also a slope. In other words, the edge region 222 and the second region 232 are joined by slopes. The first direction is the direction from the center region to the edge region.

[0054] Figure 5 The diagram shown is a structural schematic of a display module according to another embodiment of this application. Figure 5As shown, in the first direction (i.e., the X direction), the thickness of the edge region 222 gradually increases, but the rate of increase in the thickness of the edge region 222 can be different; that is, the surface of the edge region 222 near the second region 232 has multiple slopes. Simultaneously, in the first direction (i.e., the X direction), the thickness of the second region 232 gradually decreases, but the rate of decrease in the thickness of the second region 232 can be different; that is, the surface of the second region 232 near the edge region 222 also has multiple slopes.

[0055] In one embodiment, the surface of the edge region 222 near the second region 232 may also be a curved surface, and the surface of the second region 232 near the edge region 222 may be a curved surface that matches the surface of the edge region 222 near the second region 232. Figure 6 The diagram shown is a structural schematic of a display module according to another embodiment of this application. Figure 6 As shown, the surface of the edge region 222 near the second region 232 is a concave curved surface, and the surface of the second region 232 near the edge region 222 is a convex curved surface. In one embodiment, the surface of the edge region 222 near the second region 232 is a convex curved surface, and the surface of the second region 232 near the edge region 222 is a concave curved surface.

[0056] By gradually increasing the thickness of the edge region 222 and gradually decreasing the thickness of the second region 232, the edge region 222 and the second region 232 can be bonded together by an inclined surface, which increases the contact area between the edge region 222 and the second region 232, improves the adhesion between the edge region 222 and the second region 232, and further reduces the separation problem between the edge region 222 and the second region 232.

[0057] Figure 7 The diagram shown is a structural schematic of a display module provided in another embodiment of this application. Figure 8 The diagram shown is a structural schematic of a display module provided in another embodiment of this application. Figure 9 The diagram shown is a structural schematic of a display module according to another embodiment of this application. Figures 7 to 9 As shown, the edge region 222 includes a first concave-convex structure 2221, and the second region 232 includes a second concave-convex structure 2321 that cooperates with the first concave-convex structure 2221.

[0058] like Figure 7 As shown, the first concave-convex structure 2221 and the second concave-convex structure 2321 can be mutually cooperating sawtooth structures. For example... Figure 8 As shown, the first concave-convex structure 2221 and the second concave-convex structure 2321 can also be mutually cooperating stepped structures. For example... Figure 9As shown, the first concave-convex structure 2221 and the second concave-convex structure 2321 can also be irregular structures that cooperate with each other. Irregular structures can be obtained by roughening the surface.

[0059] By setting a first concave-convex structure 2221 and a second concave-convex structure 2321, and the first concave-convex structure 2221 and the second concave-convex structure 2321 cooperating with each other, the contact area between the edge region 222 and the second region 232 is further increased, the adhesion between the edge region 222 and the second region 232 is improved, and the separation problem between the edge region 222 and the second region 232 is reduced.

[0060] Figure 10 The diagram shown is a structural schematic of a display module according to another embodiment of this application. Figure 10 As shown, the display module may further include a raised structure 24, a support layer 25 for the flat area, and a protective layer 26. The raised structure 24 includes a stacked raised layer 241, a double-sided adhesive layer 242, and a composite tape layer 243. The raised layer 24 is disposed on the side of the adhesive layer 23 away from the support layer 22. One surface of the support layer 25 for the flat area is adhered to the flat area 213, and the other surface of the support layer 25 for the flat area is adhered to the composite tape layer 243. The support layer 25 for the flat area supports the flat area 213. Both the double-sided adhesive layer 242 and the composite tape layer 243 can be made of adhesive materials. The raised layer 241 can be made of PET.

[0061] The support layer 22 supports and protects the non-bending area 212 of the flexible screen 21; therefore, the support layer 22 corresponds to the non-bending area 212 of the flexible screen 21. The support layer 25 for the flat area supports and protects the flat area 213 of the flexible screen 21; therefore, the support layer 25 for the flat area corresponds to the flat area 213 of the flexible screen 21. The protective layer 26 protects the curved bending area 211 of the flexible screen 21; therefore, the protective layer 26 corresponds to the curved bending area 211 of the flexible screen 21. To better protect the flexible screen 21, the protective layer 26 can extend to both the non-bending area 212 and the flat area 213.

[0062] This application also provides a display device, including the display module described in the above embodiments. The display module includes a flexible screen 21, a support layer 22, and an adhesive layer 23. The flexible screen 21 includes an arc-shaped bending area 211 and a non-bending area 212. The support layer 22 is stacked with the non-bending area 212, and the bending direction of the arc-shaped bending area 211 faces the support layer 22. The support layer 22 includes a central region 221 and an edge region 222 near the arc-shaped bending area 211. Figure 2As shown, the thickness of the central region 221 is less than the thickness of the edge region 222. An adhesive layer 23 is disposed on the surface of the support layer 22 away from the flexible screen 21. The adhesive layer 23 includes a first region 231 and a second region 232. Figure 2 As shown, the first region 231 corresponds to the central region 221, and the second region 232 corresponds to the edge region 222. The thickness of the first region 231 is greater than the thickness of the second region 232.

[0063] By making the thickness of the central region 221 of the support layer 22 less than the thickness of the edge region 222, the rigidity of the edge region 222 of the support layer 22 is increased, reducing the warping problem of the edge region 222 of the support layer 22, thereby allowing the edge region 222 to better fit with the second region 232 of the adhesive layer 23. At the same time, by making the thickness of the first region 231 greater than the thickness of the second region 232, the sum of the thickness of the central region 231 and the thickness of the first region 231 is approximately equal to the sum of the thickness of the edge region 222 and the thickness of the second region 232. This ensures that the bending radius R1 of the arc-shaped bending area 211 in the Y direction is not too large, and thus ensures that the bending radius R2 of the arc-shaped bending area 211 in the X direction is not too large, achieving a narrow bezel effect for the display device.

[0064] Figure 11 The diagram shown is a flowchart illustrating a method for fabricating a display module according to an embodiment of this application. Figure 11 As shown in the embodiments of this application, the method for preparing the display module includes the following steps.

[0065] Step 1110: Provide a flexible screen and a support layer.

[0066] Figure 12 The diagram shown is a structural schematic of a flexible screen and support layer provided in an embodiment of this application. Figure 12 As shown, the flexible screen 21 includes a straight area 213, a bending area 2110, and a non-bending area 212 connected in sequence. A support layer 22 is stacked with the non-bending area 212. The support layer 22 includes a central area 221 and an edge area 222. The thickness of the central area 221 is less than the thickness of the edge area 222.

[0067] Step 1120: Form an adhesive layer on the surface of the flat area near the support layer.

[0068] Figure 13 The diagram shown is a structural schematic of an embodiment of this application, illustrating the formation of an adhesive layer on the surface of the flat region near the support layer. Figure 13As shown, the adhesive layer 23 includes a first region 231 and a second region 232. The thickness of the first region 231 is greater than the thickness of the second region 232. The first region 231 corresponds to the center region 221, and the second region 232 corresponds to the edge region 222.

[0069] Step 1130: Bend the flexible screen along the bending direction to form a bending area in the area to be bent.

[0070] Figure 14 The diagram shown is a schematic representation of the structure of a flexible screen after bending, according to an embodiment of this application. Figure 14 As shown, the bending direction is towards the support layer. The flexible screen 21 is bent along the bending direction so that the area to be bent 2110 forms a bending area 211.

[0071] Step 1140: Adhere the surface of the support layer away from the flexible screen to the adhesive layer.

[0072] like Figure 14 As shown, after the flexible screen 21 is bent, there may be a certain gap between the support layer 22 and the adhesive layer 23. Therefore, it is necessary to attach the surface of the support layer away from the flexible screen to the adhesive layer. Figure 15 The diagram shown is a schematic representation of the structure provided in an embodiment of this application, where the surface of the support layer furthest from the flexible screen is bonded to the adhesive layer. Figure 15 As shown, after the side surface of the support layer 22 away from the flexible screen 21 is attached to the adhesive layer 23, there is no gap between the support layer 22 and the adhesive layer 23.

[0073] Figure 16 The diagram shown is a structural schematic of a flexible screen and a support layer provided in another embodiment of this application. Figure 17 The diagram shown is a structural schematic of a flat region near the support layer after an adhesive layer has been formed, according to another embodiment of this application. Figure 18 The diagram shown is a structural schematic of a flexible screen after bending, according to another embodiment of this application. Figure 19 The diagram shown is a structural schematic of another embodiment of this application, illustrating the bonding of the adhesive layer to the surface of the support layer furthest from the flexible screen. Figure 16 As shown, the surface of the flat area 213 of the flexible screen 21 provided in step 1110 can be provided with a support layer 25 and a raised structure 24 for the flat area. For example... Figure 17 As shown, step 1120 may involve forming an adhesive layer 23 on the side surface of the raised structure 24 away from the flat area 213. Figure 18 It is the structure obtained by bending the flexible screen body after step 1130. Figure 19 It is the structure obtained by step 1140 after bonding the side surface of the support layer away from the flexible screen to the adhesive layer.

[0074] In some embodiments, before the side surface of the support layer away from the flexible screen is bonded to the adhesive layer, the sum of the thickness of the central region and the thickness of the first region is less than the sum of the thickness of the edge region and the thickness of the second region.

[0075] For example, such as Figure 13 As shown, in the first direction, the thickness of the edge region 222 gradually increases, meaning the surface of the edge region 222 is an inclined plane with an angle b between it and the horizontal plane. Figure 13 As shown, in the direction opposite to the first direction, the thickness of the second region 232 gradually decreases, that is, the surface of the second region 232 is an inclined plane, and the angle between the inclined plane and the horizontal plane is α. Angle α can be less than angle b, so that the sum of the thickness of the central region 221 and the thickness of the first region 231 is less than the sum of the thickness of the edge region 222 and the thickness of the second region 232.

[0076] The process of bonding the support layer to the adhesive layer on the side away from the flexible screen includes: pressing the support layer to the adhesive layer using pressure, such that the sum of the thickness of the central region and the thickness of the first region equals the sum of the thickness of the edge region and the thickness of the second region. That is, before pressing the support layer to the adhesive layer, the total thickness of the edge region and the second region is greater than the total thickness of the central region and the first region. Then, through pressing, the total thickness of the edge region and the second region is reduced, thereby increasing the bonding force between the edge region and the second region.

[0077] In some embodiments, the material of the second region is a photosensitive adhesive. After the support layer is bonded to the adhesive layer on the side of the flexible screen away from the support layer, the preparation method further includes curing the second region using ultraviolet light. Curing the second region using ultraviolet light can harden the photosensitive adhesive in the second region, reducing the problem of the second region warping upwards due to deformation caused by edge warping.

[0078] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display module, characterized in that, include: Flexible screen body, including curved bending area and non-bending area; A support layer is stacked on top of the non-bending area, and the bending direction of the arc-shaped bending area is towards the support layer. The support layer includes a central area and an edge area near the arc-shaped bending area, and the thickness of the central area is less than the thickness of the edge area. An adhesive layer is disposed on the side surface of the support layer away from the flexible screen body. The adhesive layer includes a first region and a second region. The first region corresponds to the center region, and the second region corresponds to the edge region. The thickness of the first region is greater than the thickness of the second region. Before the support layer is bonded to the adhesive layer on the side of the flexible screen away from the support layer, in the first direction, the thickness of the edge region gradually increases, and the angle between the surface of the edge region away from the flexible screen and the plane where the flexible screen is located is b; in the opposite direction to the first direction, the thickness of the second region gradually decreases, and the angle between the surface of the second region away from the flexible screen and the plane where the flexible screen is located is a, where angle a is less than angle b. After the support layer is bonded to the adhesive layer on the side of the flexible screen away from the support layer, the thickness of the edge region gradually increases in a first direction, and the thickness of the second region gradually decreases. The first direction is the direction from the center region to the edge region.

2. The display module according to claim 1, characterized in that, The sum of the thickness of the central region and the thickness of the first region is equal to the sum of the thickness of the edge region and the thickness of the second region.

3. The display module according to claim 1, characterized in that, The edge region includes a first concave-convex structure, and the second region includes a second concave-convex structure that mates with the first concave-convex structure.

4. The display module according to claim 1, characterized in that, The material of the second region is photosensitive adhesive.

5. The display module according to claim 4, characterized in that, The material of the first region is different from the material of the second region.

6. A method for manufacturing a display module, characterized in that, include: A flexible screen body and a support layer are provided. The flexible screen body includes a straight area, a bending area, and a non-bending area connected in sequence. The support layer is stacked with the non-bending area. The support layer includes a central area and an edge area. The thickness of the central area is less than the thickness of the edge area. An adhesive layer is formed on the surface of the flat area near the support layer. The adhesive layer includes a first region and a second region. The thickness of the first region is greater than the thickness of the second region. The first region corresponds to the center region, and the second region corresponds to the edge region. Before the adhesive layer is applied to the surface of the support layer away from the flexible screen, the thickness of the edge region gradually increases in a first direction, and the angle between the surface of the edge region away from the flexible screen and the plane where the flexible screen is located is b. In the opposite direction to the first direction, the thickness of the second region gradually decreases, and the angle between the surface of the second region away from the flexible screen and the plane where the flexible screen is located is α, where α is less than αb. The first direction is the direction from the center region to the edge region. The flexible screen is bent along the bending direction to form a bending area in the area to be bent, and the bending direction is toward the support layer. The support layer is attached to the adhesive layer on the side of the support layer away from the flexible screen body; in the first direction, the thickness of the edge region gradually increases, and the thickness of the second region gradually decreases.

7. The method for preparing a display module according to claim 6, characterized in that, Before the support layer is bonded to the adhesive layer on the side of the support layer away from the flexible screen, the sum of the thickness of the central region and the thickness of the first region is less than the sum of the thickness of the edge region and the thickness of the second region; The step of bonding the side surface of the support layer away from the flexible screen to the adhesive layer includes: Using pressure, the surface of the support layer away from the flexible screen is pressed together with the adhesive layer so that the sum of the thickness of the central region and the thickness of the first region is equal to the sum of the thickness of the edge region and the thickness of the second region.

8. The method for preparing a display module according to claim 6, characterized in that, The material of the second region is photosensitive adhesive. After bonding the surface of the support layer away from the flexible screen to the adhesive layer, the preparation method further includes: The second region is cured using ultraviolet light.

9. A display device, characterized in that, include: The display module according to any one of claims 1 to 5.

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