Display module, assembling method of display module and display device

Abstract

The application provides a display module, an assembly method of the display module and a display device. The display module comprises a display panel, a first supporting film, a profiling piece and a filling layer. The display panel comprises a first flat part, a bending part and a second flat part. The first flat part is arranged in a display area. The bending part forms a bending area. The second flat part is arranged in a non-display area. The first supporting film is arranged on a non-display side of the first flat part. The first supporting film comprises a first end surface. The profiling piece comprises a first part and a second part. The first part is arranged on a side of the first supporting film away from the first flat part. The second part is arranged in the bending area. A part of a surface of the second part close to the first part is in contact with the first end surface. At least part of an outer surface of the second part away from the first part is arranged as a profiling curved surface. The second part has a plurality of grooves. Openings of the grooves are located on the profiling curved surface. The filling layer fills at least the plurality of grooves. The technical solution of the application can provide higher strength support for the display panel during bending, and avoid uneven stress in the bending area.

Description

Technical Field

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

[0002] With the continuous advancement of display technology, consumers are placing higher demands on the display effects and appearance design of electronic products. Flexible display panels, with their bendable and foldable characteristics, have made it possible to realize diverse display forms and are gradually becoming a research hotspot and development trend in the display field.

[0003] However, current display products have some problems. Summary of the Invention

[0004] This application provides a display module, a method for assembling the display module, and a display device to solve the problems in the prior art.

[0005] In a first aspect, embodiments of this application provide a display module, comprising: a display panel, including a first straight portion, a bent portion, and a second straight portion connected in sequence, the first straight portion being disposed in the display area of ​​the display panel, the bent portion forming the bent area of ​​the display panel, and the second straight portion being disposed in the non-display area of ​​the display panel; a first support film located on the non-display side of the first straight portion, the first support film including a first end face near the bent area; a contouring component including a first component and a second component connected to each other, the first component being disposed on the side of the first support film away from the first straight portion, the second component being disposed in the bent area of ​​the display panel, wherein a portion of the surface of the second component near the first component contacts the first end face, at least a portion of the outer surface of the second component away from the first component is configured as a contoured curved surface, the second component is provided with a plurality of grooves, the openings of the grooves being located on the contoured curved surface; and a filling layer located at least in the bent area, the filling layer being located between the second component and the bent portion and filling at least the plurality of grooves.

[0006] In conjunction with the first aspect, the display module further includes: a first adhesive layer located between the first support film and the first component; preferably, the display module further includes a buffer layer disposed on the side of the first support film opposite to the first straight portion, wherein the orthographic projection of the buffer layer on the first support film does not overlap with the orthographic projection of the first component on the first support film; preferably, the display module further includes a second adhesive layer located between the buffer layer and the first component; preferably, the display module further includes a raising block disposed on the side of the buffer layer opposite to the first straight portion, wherein the orthographic projection of the raising block on the first support film does not overlap with the orthographic projection of the first component on the first support film; preferably, the end face of the raising block near the first component is flush with the end face of the buffer layer near the first component, and a second adhesive layer is disposed between the raising block and the first component; preferably, the display module further includes a second support film disposed on the side of the first component opposite to the first support film; the display module further includes a third adhesive layer located between the second support film and the first component; preferably, at least one of the first adhesive layer, the second adhesive layer, and the third adhesive layer is made of a mesh adhesive.

[0007] In conjunction with the first aspect, the first component and the second component are interconnected in the first direction; preferably, the cross-sectional shape of the second component in the second direction includes a semi-circular or semi-elliptical shape, wherein the second direction is perpendicular to the first direction; and / or, the cross-sectional shape of the first component in the second direction includes a rectangle; preferably, the surface of the second component near the first component includes a first plane, and the surface of the first component near the second component includes a second plane, with a portion of the first plane and the second plane in contact; preferably, the first component and the second component are integrally formed; preferably, the cross-sectional shape of the groove in the second direction includes at least one of a semi-circular, semi-elliptical, conical, or polygonal shape; preferably, the cross-sectional shape of the groove in the second direction includes a semi-circular shape, the radius of which is greater than or equal to 10 μm and less than or equal to 50 μm; preferably, the openings of the plurality of grooves are evenly distributed on the contoured surface; preferably, the contoured part is in contact with the filling layer; preferably, the orthographic projection of the filling layer in the first direction covers the orthographic projection of the contoured part in the first direction.

[0008] In conjunction with the first aspect, the material of the filler layer includes a cured reinforcing adhesive; preferably, the material of the filler layer includes at least one of: epoxy photocurable adhesive, epoxy thermocurable adhesive, acrylic photocurable adhesive, or acrylic thermocurable adhesive.

[0009] In conjunction with the first aspect, the display module further includes: a second support film disposed on the side of the first component away from the first support film, the second support film including a second end face near the bend; wherein the second end face contacts a portion of the outer surface of the second component near the first component; preferably, the second end face is flush with the first end face.

[0010] In conjunction with the first aspect, the display module further includes: a polarizing layer and a cover plate stacked sequentially on the display side of the first flat portion; preferably, the display module further includes a fourth adhesive layer located between the polarizing layer and the cover plate.

[0011] Secondly, embodiments of this application also provide a method for assembling a display module, comprising: providing a display panel before bending, the display panel including a first straight portion, a portion to be bent, and a second straight portion connected in sequence; attaching a first support film to the non-display side of the first straight portion, the first support film including a first end face near the portion to be bent; attaching a contouring member to the side of the first support film away from the first straight portion, the contouring member including a first component and a second component connected to each other, the orthographic projection of the first component on the display panel before bending being located on the first straight portion, the orthographic projection of the second component on the display panel before bending being located on the portion to be bent, wherein a portion of the surface of the second component near the first component is in contact with the first end face, at least a portion of the outer surface of the second component away from the first component is configured as a contoured curved surface, the second component is provided with a plurality of grooves, the openings of the grooves being located on the contoured curved surface; bending the portion to be bent to form a bent portion; filling a filler layer material between the second component and the bent portion, the filler layer material being in contact with the contouring member and filling at least a plurality of grooves.

[0012] In conjunction with the second aspect, while attaching the first support film to the non-display side of the first straight portion, the assembly method further includes: attaching a second support film to the second straight portion, the second support film and the first support film being disposed on the same side, the second support film including a second end face near the portion to be bent; wherein the second end face contacts the outer surface of the second component near the first component.

[0013] In conjunction with the second aspect, the assembly method further includes: filling the space between the first support film and the first component with a material for a first adhesive layer; filling the space between the first support film and the first component with a material for a first adhesive layer includes: filling the space between the first support film and the first component with a material for a first adhesive layer by a dispensing process; preferably, the method further includes: providing a buffer layer on the side of the first support film away from the substrate, wherein the orthographic projection of the buffer layer on the first support film does not overlap with the orthographic projection of the first component on the first support film; filling the space between the buffer layer and the first component with a material for a first adhesive layer; preferably, the method further includes: filling the space between the second support film and the first component with a material for a first adhesive layer; preferably, the material of the first adhesive layer is in a semi-fluid state.

[0014] Thirdly, embodiments of this application also provide a display device, including the display module described above, or a display module assembled using the assembly method described above.

[0015] The technical solution of this application embodiment is to set at least a portion of the outer surface of the second component of the conforming part as an outwardly convex surface including multiple notches (i.e., grooves). During the manufacturing process, when the display panel is bent, the second component of the conforming part can guide or squeeze the filling layer. A first support film is also provided, which can not only provide support and protection for the bent part of the display panel, but also enhance the fastness between the conforming part and the bent part, and avoid excessive local stress causing deformation and damage to the edge of the bent area of ​​the display panel; further improve the quality of the display panel. Attached Figure Description

[0016] Figure 1A This is a schematic diagram of the lower border position of a display module in existing technology.

[0017] Figure 1B This is a schematic diagram of the lower border position of a display module in existing technology.

[0018] Figure 2 This is a schematic cross-sectional view of a display module provided in an embodiment of this application.

[0019] Figure 3A This is a schematic diagram of the cross-sectional structure of the contouring component provided in another embodiment of this application.

[0020] Figure 3B This is a schematic diagram of the cross-sectional structure of the contouring component provided in another embodiment of this application.

[0021] Figure 3C This is a schematic diagram of the cross-sectional structure of the contouring component provided in another embodiment of this application.

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the contouring component provided in another embodiment of this application.

[0023] Figure 5 This is a cross-sectional structural schematic diagram of a display module provided in another embodiment of this application.

[0024] Figure 6 This is a cross-sectional structural schematic diagram of a display module provided in another embodiment of this application.

[0025] Figure 7 This is a cross-sectional structural schematic diagram of a display module provided in another embodiment of this application.

[0026] Figure 8 This is a cross-sectional structural schematic diagram of a display module provided in another embodiment of this application.

[0027] Figure 9 This is a cross-sectional structural schematic diagram of a display module provided in another embodiment of this application.

[0028] Figure 10This is a schematic flowchart of an assembly method for a display module provided in an embodiment of this application.

[0029] Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0030] 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 skilled in the art without creative effort are within the scope of protection of this application.

[0031] For display panels, especially flexible display panels, increasing screen-to-body ratio and ensuring product reliability under various usage conditions are two key development directions. Users expect electronic products to have larger display areas and narrower bezels. For flexible display panels, the edges are often designed to be curved, or folding and rolling technologies are used to effectively reduce the space occupied by the bezels, thereby increasing the screen-to-body ratio. However, increasing the screen-to-body ratio often requires complex bending or folding operations on the panel. But, due to limitations in manufacturing processes and equipment, the panel may develop irregular shapes after bending, leading to uneven stress in the bending area and potentially causing the metal wires in the screen to break, resulting in display abnormalities. Therefore, simply pursuing a higher screen-to-body ratio may sacrifice product reliability, while an overly conservative emphasis on reliability will limit further increases in screen-to-body ratio, failing to meet user needs. Therefore, an effective technological solution is needed to achieve a balance between these two aspects.

[0032] Figure 1A and Figure 1B This is a schematic diagram illustrating the position of the bottom bezel of a display module in existing technology. For example... Figure 1A and Figure 1B As shown, the display module includes a bendable display panel, a portion of which is bent to the back of the display module. At least the surface of the display panel located in the bending area is coated with BPL. The display module also includes a bottom plate film (BPF), a super clean foam (SCF), and a padding block sequentially disposed on the non-display surface of the display panel. The display panel also includes a polarizer (POL), an optically clear adhesive (OCA), and a cover glass (CG) sequentially disposed on the display surface of the display panel. The surface of the cover glass is coated with ink (CGInk). Figure 1A The image shows a display module with uniform stress. Figure 1B The image shows a display module with uneven stress. It can be seen that when the bending radius is too small, local stress concentration is likely to occur in the bending area, which in turn leads to a decrease in the performance of the display module.

[0033] In this embodiment, by setting a contouring element and a filling layer in the bending area, the contouring element fits the bending area, enhancing the fastness between the contouring element and the bending part. This provides support and protection for the bending part of the display panel and prevents excessive local stress from causing deformation and damage to the edge of the bending area of ​​the display panel, thereby improving the quality of the display panel. Furthermore, a support film is set in the straight area to provide support for the contouring element, enabling the contouring element to be positioned so that the position of the contouring element relative to the bending part is fixed.

[0034] Figure 2 This is a schematic cross-sectional view of a display module provided in one embodiment of this application. Figure 2 As shown, the display module includes a display panel 100, a contoured part 200, a filling layer 300, and a first support film 401.

[0035] In this embodiment, the display panel 100 is a flexible display panel. After the display panel 100 is assembled into a display module, a portion of the display panel 100 (e.g., the bonding area) is bent to the non-display surface of the display module to achieve a narrow bezel. As shown in FIG1, the display panel 100 includes a first straight portion 111, a bent portion 112, and a second straight portion 113 connected in sequence. The first straight portion 111 is disposed in the display area AA of the display panel, the bent portion 112 forms the bent area A of the display panel 100, and the second straight portion 113 is disposed in the non-display area NA of the display panel 100.

[0036] The first support film 401 is located on the non-display side of the first straight portion 111. The first support film 401 includes a first end face 4011 near the bending area A. In this embodiment, attaching the first support film 401 to the non-display side of the display panel 100 not only provides reliable support and increases the rigidity of the display module, but also contacts the contouring member 200, facilitating the positioning and fixing of the contouring member 200. This further ensures that the bent portion 112 maintains a stable shape during use, preventing excessive bending, twisting, or deformation caused by external forces, thereby improving the mechanical stability of the panel and helping to enhance its durability and resistance to damage.

[0037] Optionally, the first support film 401 may be made of at least one of polyimide (PI), acrylic resin, epoxy resin, polyethylene terephthalate (PET), or polymethyl methacrylate (PMMA).

[0038] The contouring component 200 includes a first component 210 and a second component 220 connected to each other. The first component 210 is disposed on the side of the first support film 401 away from the first straight portion 111. The second component 220 is disposed in the bending area A of the display panel 100. The surface of the second component 220 near the first component 210 contacts the first end face 4011. At least a portion of the outer surface of the second component 220 away from the first component 210 is configured as a contouring curved surface 2201. The second component 220 is provided with a plurality of grooves 2202, and the openings of the grooves are located on the contouring curved surface 2201.

[0039] Understandably, to avoid excessive local stress in the bent portion 112, a contouring component 200 is used to provide support and protection for the bent portion 112 of the display panel 100. Therefore, the contouring surface 2201 can be determined according to the ideal bending shape of the display panel 100 (e.g., bending radius, bending area A space, etc.). When the contouring component 200 is used in the display module, the bent portion 112 of the display panel 100 can be fitted with the contouring surface of the second component 220 of the contouring component 200 to define the shape of the bent portion of the display panel 100. The advantage of doing so is that it not only provides uniform and stable support for the bending area, but also prevents the panel from undergoing excessive local deformation or twisting during the bending process. In this embodiment, the groove is mainly used to fill the reinforcing liquid (i.e., Figure 2 Furthermore, the groove 2202 can also allow the contour piece 200 to deform appropriately at a specific location when subjected to external force, so as to buffer and disperse the stress on the panel, just like setting some "flexible joints" at the bend, so that the display panel 100 and the contour piece 200 can bend together, reducing damage to the display panel 100.

[0040] Figures 3A-3C These are schematic diagrams of the cross-sectional structures of the three contoured parts provided in the embodiments of this application. Figures 3A-3C The difference between the profile 200 shown is that the shape of the groove 2202 on the surface of the second component 220 is different. Optionally, the groove 2202 is in the second direction ( Figure 3A The cross-sectional shape in the y-direction includes a semi-circle ( Figure 3A ), semi-elliptical (not shown in the figure), conical ( Figure 3B ) or polygon ( Figure 3C At least one of the following. Next, using... Figure 3A Let's take an example to explain in detail. For example... Figure 3A As shown in the embodiment of this application, the first component 210 and the second component 220 are in the first direction ( Figure 3A They are interconnected in the x-direction.

[0041] In this embodiment of the application, the cross-sectional shape of the second component 220 in the second direction includes a semi-circle ( Figure 3AThe first component 210 may be rectangular or semi-elliptical, wherein the second direction is perpendicular to the first direction; and / or the cross-sectional shape of the first component 210 in the second direction includes a rectangle.

[0042] Optionally, the length of the first component 210 in the first direction can also be set. For example... Figure 4 As shown, the length of the first component 210 in the first direction is the same as the length of the first straight portion 111.

[0043] refer to Figure 3A The surface of the second component 220 near the first component 210 includes a first plane 2101, and the surface of the first component 210 near the second component 220 includes a second plane 2203. Part of the first plane 2101 and the second plane 2203 are in contact.

[0044] Optionally, the first component 210 and the second component 220 are integrally molded. Considering that plastic is easy to process, lightweight, and low in cost, plastic can be chosen to make the contour parts. For example, the materials of the first component 210 and the second component 220 can be polyethylene terephthalate, polycarbonate (PC), polymethyl methacrylate (PMMA), etc.

[0045] Considering that the opening of the groove 2202 is located on the contoured surface 2201, in order to ensure that the contoured part 200 can effectively cooperate with the filling layer 300 to achieve the protection and reinforcement of the bending area A, the depth and width of the groove 2202 can be set according to the actual situation.

[0046] In some embodiments, considering that the stress on the bending area A is related to the bending radius of the bending area, in order to better fit the groove 2202 of the contouring member 200 to the bending area A and to provide space filling material, the shape and depth of the groove 2202 can be determined based on the bending radius of the bending area A. For example, when the bending radius is large, the shape of the groove 2202 can be more rounded, and the depth and width need to be adjusted accordingly to ensure that the filling layer 300 can effectively function when bending at a small radius, preventing damage such as cracks in the display panel 100. For example, for a display panel 100 with a bending radius of 0.2 mm, the depth of the groove 2202 can be set to be greater than or equal to 10 μm and less than or equal to 20 μm, for example, it can be 10 μm, 12 μm, 15 μm, or 20 μm, etc. For a display panel 100 with a bending radius of 0.3 mm, the depth of the groove 2202 can be set to be greater than or equal to 40 μm and less than or equal to 50 μm, for example, it can be 40 μm, 41 μm, 42 μm, 45 μm or 50 μm, etc.

[0047] In some embodiments, considering that a thicker display panel 100 may require greater support and reinforcement, the size of the groove 2202 can be determined based on the thickness of the display panel 100 to better distribute stress. For example, for a display panel 100 with a thickness of 0.2 mm, the depth of the groove 2202 can be set to be greater than or equal to 10 μm and less than or equal to 50 μm, such as 10 μm, 25 μm, 30 μm, or 50 μm. For a display panel 100 with a thickness of 1 mm, the depth of the groove 2202 can be greater than or equal to 60 μm and less than or equal to 80 μm, such as 60 μm, 65 μm, 70 μm, 75 μm, or 80 μm.

[0048] Optionally, the surface grooves 2202 of the contouring part 200 can be configured based on the material properties of the filler layer 300. For example, for filler layer 300 materials with higher viscosity, wider and deeper grooves 2202 can be configured to allow them to flow smoothly into and fill the grooves 2202. For example, if the filler layer material has a high viscosity, the width of the groove 2202 can be set to be greater than or equal to 60 μm and less than or equal to 80 μm, such as 60 μm, 65 μm, 70 μm, or 80 μm. If the viscosity is lower, the groove 2202 can be relatively narrower and shallower, and the width can be greater than or equal to 10 μm and less than or equal to 50 μm, such as 10 μm, 15 μm, 30 μm, or 45 μm.

[0049] Considering that the material strength and supporting force of the contouring component 200 are related, the surface grooves of the contouring component 200 can be designed based on its strength to ensure its supporting force. For example, for a high-strength material like metal, the groove 2202 can be relatively smaller because it provides good support. The groove 2202 mainly accommodates the filling layer 300 and the bending area A of the display panel 100. If the contouring component 200 is made of a low-strength plastic material, the size of the groove 2202 needs to be appropriately increased to increase the amount of filling layer 300 material and compensate for the insufficient strength of the contouring component 200 itself. For example, the depth and width of the groove 2202 can be smaller for a metal contouring component 200, while the depth and width of the groove 2202 can be larger for a plastic contouring component 200.

[0050] To ensure uniform stress distribution on the surface of the groove 2202, the cross-sectional shape of the groove 2202 in the second direction can be configured to include a semi-circle. For example, multiple hemispherical grooves 2202 can be provided in the second component 220, and the openings of the grooves 2202 are located on the contoured curved surface 2201 of the second component 220. Preferably, the radius of the semi-circle is greater than or equal to 10 μm and less than or equal to 50 μm; for example, it can be 10 μm, 15 μm, 20 μm, or 50 μm, etc.

[0051] Understandably, the material of the contouring component 200 can be selected based on the actual application scenario. Specifically, in some scenarios, considering that the contouring component 200 can mitigate the impact force through its own deformation when the display panel 100 is subjected to impact or vibration, thus playing a shock-absorbing and buffering role, a material with a low Young's modulus can be selected as the material for the contouring component. This not only allows for better adhesion to structures such as the filling layer 300 and the first support film 401, but also provides good protection for the display panel 100. In some scenarios, a material with a high Young's modulus can also be selected as the material for the contouring component 200, as the contouring component 200 is less prone to deformation, providing better support for the bending portion 112.

[0052] Optionally, the material of the profile 200 may be silicone, rubber, or foam. For example, the material of the profile 200 may be polyethylene terephthalate, polyurethane, or polymethyl methacrylate.

[0053] A filling layer 300 is located at least in the bending area A, and the filling layer 300 is located between the second component 220 and the bending portion 112 and fills at least a plurality of grooves 2202.

[0054] In this embodiment, the filling layer 300 is located between the second component 220 and the bent portion 112. On one hand, it can fill the tiny gaps and uneven areas between the contoured part 200 and the bent area A, making the bent area A form a whole structure, making the surface of the bent area A smoother, effectively dispersing stress, and preventing damage to the internal structure of the display panel 100 due to uneven stress, thereby improving the bending resistance and durability of the display panel 100. This improves the reliability and stability of the display panel 100. Furthermore, the groove 2202 can also increase the adhesion between the contoured part 200 and the filling layer 300, making the bent area A form a whole structure.

[0055] To further enhance the overall structural strength and firmly connect the conformal component 200 and the bending portion 112, in this embodiment, the filler layer 300 is made of cured reinforcing adhesive. On one hand, this allows the bending area A to form a unified structure, effectively dispersing and bearing the stress generated during bending, thus improving the bending resistance and durability of the display panel 100. On the other hand, because the cured reinforcing adhesive has a certain degree of flexibility and elasticity, it can provide a certain buffering effect during bending, reducing mechanical damage to the display panel 100, lowering the frictional resistance during bending, making the bending process smoother, and further improving its bendability and bending life.

[0056] Considering the differences in curing methods of different curing reinforcing liquids (such as heat curing, light curing, or moisture curing), a suitable curing method can be selected based on the production process and equipment conditions.

[0057] In this embodiment, the material of the filler layer 300 includes at least one of epoxy photocurable adhesive, epoxy thermocurable adhesive, acrylic photocurable adhesive, or acrylic thermocurable adhesive.

[0058] To transmit stress more evenly, the connection strength between the first support membrane 401 and the contour member 200 can be increased. Therefore, an intermediate structure can be provided between the first support membrane 401 and the contour member 200 to increase the connection strength and further transmit stress evenly.

[0059] Optionally, the intermediate structure can be selected based on material properties. Specifically, a gradient material layer, a layer structure with gradually changing material properties, can be used to smooth stress transition. Microstructures (such as bumps, textures) can be designed on the surface of the contoured part 200 or the first support membrane 401 to increase mechanical interlocking. Fiber-reinforced layers, such as carbon fiber or glass fiber, can be used to improve strength and uniformity. Multilayer composite structures of different materials can also be set to achieve better stress distribution. Elastic materials can also be used as the intermediate structure to better absorb deformation and uniformly transfer stress. The material of the intermediate structure can also be selected based on material compatibility, processing technology, durability, weight, cost, matching of thermal expansion coefficients, interfacial bond strength, etc.

[0060] Considering that if the contouring component 200 and the first support membrane 401 are only physically contacted or mechanically fixed, they are prone to peeling or slippage during dynamic bending, in order to solve the above problems, in the embodiments of this application, such as Figure 5 As shown, the display module also includes a first adhesive layer 501, located between the first support film 401 and the first component 210; by providing an adhesive layer between the first support film 401 and the contoured component 200, the viscoelastic properties of the adhesive layer can be utilized to disperse concentrated stress to a larger contact area.

[0061] To further uniformize stress and improve the bending reliability of the display panel 100, a buffer structure can be provided under the support film. In the embodiments of this application, such as... Figure 6 As shown, the display module also includes a buffer layer 600, which is disposed on the side of the first support film 401 opposite to the first straight portion 111. The orthographic projection of the buffer layer 600 on the first support film 401 does not overlap with the orthographic projection of the first component 210 on the first support film 401. The advantages of this are that it not only creates a transition between the bending area A and the non-bending area, avoiding stress concentration; it also allows for adaptive adjustment of the support force during bending, balancing protection and flexibility; and it absorbs external impact energy, protecting the display panel 100 from damage and achieving interface stress buffering.

[0062] Optionally, the material of the buffer layer 600 is selected based on at least one of the following factors: thickness, elastic modulus, coefficient of thermal expansion, and surface roughness. For example, a stiffness control film can be used as the buffer layer 600, which can not only avoid stress concentration but also replace traditional rigid support structures (such as metal plates), making the screen thinner and lighter, achieving a lightweight support. Alternatively, ultra-clean foam can be used, which can buffer heat dissipation and also add electromagnetic shielding functions, reducing external force damage to the screen and improving the reliability and lifespan of the display module. Double-sided adhesive can also be used; due to the strong adhesion of the adhesive layer itself, it can reduce the risk of peeling between components of the display module, making it suitable for products with bending performance requirements, such as flexible display modules, improving the reliability of the display module, protecting the screen, and helping to improve product quality and yield. Optionally, the buffer layer can be a multi-layer structure, including at least one of a metal layer (e.g., copper), an adhesive layer (e.g., double-sided adhesive), and an elastic material layer (e.g., silicone, foam, etc.). For example, the buffer layer can include a metal layer, an adhesive layer, and an elastic material layer stacked in one step.

[0063] Optionally, the buffer layer 600 can be configured according to the actual situation. For example, the buffer layer 600 can be subjected to plasma surface activation treatment to improve the interfacial bonding strength; graphene can be added to improve heat dissipation, or a high-temperature resistant PI substrate can be used to avoid high-temperature deformation of the buffer layer 600; or, the coating parameters can be adjusted in real time based on thickness monitoring to avoid optical defects caused by uneven thickness of the buffer layer 600.

[0064] To achieve more uniform stress transmission, the connection strength between the buffer layer 600 and the contour member 200 can be increased. Therefore, a structure can be provided between the buffer layer 600 and the contour member 200 to increase the connection strength and further uniformly transmit stress. In the embodiments of this application, as shown... Figure 7As shown, the display module also includes a second adhesive layer 502, located between the buffer layer 600 and the first component 210, to utilize the viscoelastic properties of the adhesive layer to connect and fix the buffer layer 600 and the contoured component 200. This can better fix the contoured component 200, allowing it to fit the bent portion and preventing the contoured component 200 from shifting during the bending process of the display panel 100. It can also act as an elastic medium to absorb energy, protect other components, reduce impact, and disperse concentrated stress to a larger contact area.

[0065] To further prevent warping due to uneven stress during bending, which could lead to bonding failure or damage to the display layer, a support structure can be provided on the side of the first support film 401 away from the display panel 100, which can further fix the position of the contour piece 200.

[0066] In the embodiments of this application, such as Figure 7 As shown, the display module also includes a shim block 700, which is disposed on the side of the buffer layer 600 away from the first straight portion 111. The orthographic projection of the shim block 700 on the first support film 401 does not overlap with the orthographic projection of the first component 210 on the first support film 401. This not only further fixes the position of the contouring component 200, but also adjusts the curvature of the bending area A, thereby further reducing the risk of breakage of the display panel 100 and improving the yield of the display panel 100.

[0067] Optionally, the shim 700 can be double-sided adhesive, which can not only bond the first support film 401 and other structures (e.g., buffer layer 600) to ensure the stability of the connection, but also compensate for the height difference between the buffer layer 600 and the second flat portion 113 to fix the bending shape of the display panel 100. Moreover, the adhesive contact of the double-sided adhesive can also adapt to irregular surface settings.

[0068] In this embodiment, by setting the shim 700 on the back of the buffer layer 600, not only can local support be formed, guiding bending stress to a preset area (such as the bending axis) and avoiding stress on the edge of the straight part; it can also reduce the fretting friction between the buffer layer 600 and the underlying structure, and extend its service life.

[0069] Alternatively, in order to further reduce stress abrupt changes, the height of the shim block 700 can be adjusted. For example, the height of the shim block 700 can be designed with a gradual change (such as a stepped or sloping shape) to achieve a smooth transition of stiffness from high (straight section) to low (bending area).

[0070] Optionally, the material of the shim 700 can be selected according to the actual situation. For example, metal or ceramic materials can provide rigid support and further suppress deformation during bending; high thermal conductivity materials (such as graphene composite materials or copper alloys) can conduct heat from the bending area to the middle frame or heat sink, reducing local temperature rise.

[0071] Considering that in some scenarios, misalignment between the end faces of the shim 700 and the buffer layer 600 may lead to shear stress concentration at the interface during bending, potentially causing the metal wires of the screen to break, the end face of the shim 700 near the first component 210 can be set to be flush with the end face of the buffer layer 600 near the first component 210. This ensures maximum contact area between the shim 700 and the buffer layer 600, resulting in uniform stress distribution and reducing the risk caused by uneven stress.

[0072] To achieve more uniform stress distribution, the connection strength between the raised block 700 and the contour piece 200 can be increased. Therefore, a structure can be provided between the raised block 700 and the contour piece 200 to increase the connection strength and further distribute stress evenly. In the embodiments of this application, such as... Figure 7 As shown, a second adhesive layer 502 is provided between the shim block 700 and the first component 210.

[0073] To further ensure the bending portion 112 maintains a stable shape during use, a support structure is also provided. For example... Figure 8 As shown, the display module also includes a second support film 402, which is disposed on the side of the first component 210 opposite to the first support film 401. In this embodiment, the second support film 402 is attached to the first component 210 to provide support for the contoured part 200, further preventing the display panel 100 from excessive bending, twisting or deformation caused by external forces or other factors.

[0074] To achieve more uniform stress distribution, the connection strength between the second support membrane 402 and the contour member 200 can be increased. Therefore, an intermediate structure can be provided between the second support membrane 402 and the contour member 200. In the embodiments of this application, such as Figure 8 The display module also includes a third adhesive layer 503 located between the second support film 402 and the first component 210 to distribute stress over a larger contact area.

[0075] Considering that the first adhesive layer 501, the second adhesive layer 502, and the third adhesive layer 503 may need to withstand the stress caused by repeated bending, the materials of the first adhesive layer 501, the second adhesive layer 502, and the third adhesive layer 503 need to have durability and flexibility.

[0076] In this embodiment, the adhesive material can be selected based on the actual situation. For example, elastic adhesives (such as silicone and polyurethane) are suitable for high bending frequency scenarios and have strong fatigue resistance, but have low bonding strength. Structural adhesives (such as epoxy resin and acrylic) have high bonding strength, but poor flexibility and need to be matched with dynamic bending designs. Mesh adhesives (such as PU mesh adhesives) balance stress distribution and lightweighting through mesh structure, and are suitable for bending with small curvature.

[0077] In this embodiment of the application, in order to improve the screen ratio and achieve a narrower bottom bezel, at least one of the first adhesive layer 501, the second adhesive layer 502 and the third adhesive layer 503 may be made of mesh adhesive.

[0078] refer to Figure 8 The display panel also includes a second support film 402 disposed on the side of the first component 210 away from the first support film 401. The second support film 402 includes a second end face 4021 near the bending portion 112. The second end face 4021 contacts the outer surface of the second component 220 near the first component 210.

[0079] To further ensure uniform stress distribution at the bend, the second end face 4021 can be flush with the first end face 4011. This not only better disperses the external forces experienced by the display panel 100 during use—whether from external impacts, compression, or stress generated by internal display components—but also provides more effective buffering and release, thereby enhancing the structural stability of the display panel 100 and extending its service life. Furthermore, it facilitates standardized bonding and encapsulation processes, improving production efficiency and yield, and also simplifies subsequent testing and maintenance, enabling faster identification and resolution of potential problems.

[0080] refer to Figure 9 The display module also includes a polarizing layer 800 and a cover plate 900 sequentially stacked on the display side of the first flat portion 111. The polarizing layer 800 allows only light polarized in a specific direction to pass through, effectively blocking stray light from other directions and reducing interference from ambient light reflection, thus significantly improving the contrast and clarity of the displayed image. The cover plate 900, as the outermost structure of the display panel 100, directly resists external physical impacts, scratches, and wear, preventing damage to the delicate internal structure of the display panel 100 and extending its service life.

[0081] like Figure 9 As shown, the display module also includes a fourth adhesive layer 504, located between the polarizing layer 800 and the cover plate 900. Optionally, the fourth adhesive layer 504 includes an optically transparent adhesive. The optically transparent adhesive not only has good adhesion, firmly bonding components such as the polarizing layer 800 and the cover plate 900 together to ensure the stability and reliability of the entire display panel 100 structure and prevent loosening or displacement between components; it also has a refractive index similar to that of the cover plate 900 and the display panel 100, which can reduce the reflection and refraction of light at different media interfaces, improve light transmittance, make the displayed image clearer and brighter, and reduce the display quality degradation caused by light loss and reflection.

[0082] Figure 10 This is a flowchart of a display module assembly method provided in an embodiment of this application, as shown below. Figure 10 As shown, the method includes the following steps.

[0083] Step S710, providing a display panel before bending.

[0084] The display panel before bending includes a first straight section, a section to be bent, and a second straight section connected in sequence.

[0085] Step S720: The first support film is attached to the non-display side of the first flat portion.

[0086] The first support film includes a first end face near the portion to be bent. The non-display surface of the first straight portion is provided with the first support film, and the first end face contacts the outer surface of the second component near the first component.

[0087] In this embodiment of the application, while attaching the first support film to the non-display side of the first straight portion, the method further includes: attaching a second support film to the second straight portion, wherein the second support film and the first support film are disposed on the same side, and the second support film includes a second end face near the portion to be bent; wherein the second end face contacts the outer surface of the second component near the first component.

[0088] Specifically, a second support membrane is provided on the second straight portion, and the second support membrane and the first support membrane are provided on the same side. The first support membrane includes a first end face near the portion to be bent, and the second support membrane includes a second end face near the portion to be bent. The second end face is in contact with the outer surface of the second component near the first component.

[0089] Step S730: The contour piece is attached to the side of the first support membrane opposite to the first straight portion.

[0090] The conforming component includes a first component and a second component that are connected to each other. The orthographic projection of the first component on the display panel before bending is located in the first straight section, and the orthographic projection of the second component on the display panel before bending is located in the section to be bent. The second component has a portion of its surface near the first component in contact with the first end face. At least a portion of the outer surface of the second component away from the first component is configured as a conforming curved surface. The second component has a plurality of grooves, and the openings of the grooves are located on the conforming curved surface.

[0091] In this embodiment of the application, the method further includes: filling the first adhesive layer between the first support film and the first component with a material; optionally, the material for filling the first adhesive layer between the first support film and the first component includes: filling the first adhesive layer between the first support film and the first component with a material through a dispensing process.

[0092] Specifically, a first adhesive layer is applied to the surface of the first support film facing away from the first straight portion and the end face of the first support film near the second component using a dispensing process. Then, the contour piece is attached to the side of the first adhesive layer facing away from the first support film, so that the space between the support layer and the first component of the contour piece (including the space between the support layer and the second component) is filled with the material of the first adhesive layer.

[0093] Optionally, the method further includes: providing a buffer layer on the side of the first support film away from the substrate, wherein the orthographic projection of the buffer layer on the first support film does not overlap with the orthographic projection of the first component on the first support film; and filling the space between the buffer layer and the first component with the material of the first adhesive layer.

[0094] Specifically, a first adhesive layer material is applied to the surface of the first support film opposite to the first straight portion, and then a buffer layer is attached to the side of the first adhesive layer opposite to the first support film. The orthographic projection of the buffer layer on the first support film does not overlap with the orthographic projection of the first component on the first support film. Furthermore, the material of the first adhesive layer is filled between the buffer layer and the first component.

[0095] Optionally, a first adhesive layer material is applied to the surface of the first support film opposite to the first straight portion and the end face of the first component away from the second component. Then, a buffer layer is attached to the side of the first adhesive layer opposite to the first support film. The orthographic projection of the buffer layer on the first support film does not overlap with the orthographic projection of the first component on the first support film. This achieves the simultaneous filling of the first adhesive layer material between the first support film and the contoured part, and filling the buffer layer and the first component with the first adhesive layer material.

[0096] Optionally, the method further includes filling the space between the second support film and the first component with the material of the first adhesive layer. Specifically, the first adhesive layer material is applied to the surface of the second support film opposite to the second straight portion and to the end face of the second support film near the second component, thereby attaching the profile to the side of the first adhesive layer opposite to the second support film, such that the space between the support layer and the first component of the profile (including the space between the support layer and the second component) is filled with the material of the first adhesive layer.

[0097] Optionally, the dispensing process includes dispensing via a piezoelectric valve or a screw valve.

[0098] Optionally, the material of the first adhesive layer is in a semi-fluid state. For example, it can be a modified epoxy or silicone system. By setting the adhesive to be semi-fluid, the adhesive layer is evenly distributed and of uniform thickness, reducing local stress differences after curing and helping to uniform stress. It can also solve the problem that traditional adhesive layers are prone to reduced adhesion due to interfacial hydrolysis in humid and hot environments. It can flow and fill to reduce interfacial porosity and block water vapor penetration paths.

[0099] In this embodiment of the application, the method further includes: attaching a buffer layer to the side of the first support film away from the first straight portion, wherein the orthographic projection of the buffer layer on the first support film does not overlap with the orthographic projection of the first component on the first support film; providing a shim block on the side of the buffer layer away from the first straight portion, wherein the orthographic projection of the shim block on the first support film does not overlap with the orthographic projection of the first component on the first support film; and providing a second support film on the side of the first component away from the first support film, wherein the second support film includes a second end face near the bend, the second end face is in contact with the outer surface of the second component near the first component, and the second end face is flush with the first end face.

[0100] Step S740: Bend the part to be bent to form a bent part.

[0101] Specifically, when bending the display panel, the part to be bent is bent along the contoured curved surface to obtain the bent part.

[0102] In step S750, a filler material is filled between the second component and the bent portion. The filler material contacts the contoured part and fills at least a plurality of grooves.

[0103] Specifically, the filling layer material is applied to the side edge of the bend that faces away from the display panel surface, so that it fills the space between the second component and the bend, filling multiple grooves.

[0104] Optionally, a filling layer material is applied to the groove opening on the side edge of the bend away from the display panel surface, so that it fills at least a number of grooves, thereby filling the receiving space between the second component and the bend.

[0105] In this embodiment of the application, the method further includes: sequentially stacking a polarizing layer, a fourth adhesive layer, and a cover plate on the display side of the first flat portion.

[0106] Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Figure 11 As shown, the display device 10 is a product with image display capabilities. For example, the display device 10 can be used to display static images, such as pictures or photographs. The display device 10 can also be used to display dynamic images, such as videos.

[0107] Display device 10 can be a laptop, mobile phone, handheld or portable computer, camera, camcorder, in-vehicle smart central control screen, calculator, smartwatch, GPS navigator, electronic photo, electronic billboard or sign, projector, etc.

[0108] The display device 10 includes the display module provided in any of the above embodiments. The display panel included in the display module may be an organic light-emitting diode display panel or a quantum dot electroluminescent display panel.

[0109] In addition, the display device 10 can also perform functions such as taking photos, recording videos, fingerprint recognition, and facial recognition. Accordingly, the display device 10 also includes at least one functional module for implementing the above functions, such as an under-display camera or an under-display fingerprint recognition sensor.

[0110] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0111] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0112] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0113] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0114] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

[0115] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A display module, characterized in that, include: The display panel includes a first straight portion, a bent portion, and a second straight portion connected in sequence. The first straight portion is disposed in the display area of ​​the display panel, the bent portion forms the bent area of ​​the display panel, and the second straight portion is disposed in the non-display area of ​​the display panel. A first support film is located on the non-display side of the first straight portion, and the first support film includes a first end face near the bending area; The contouring component includes a first component and a second component connected to each other. The first component is disposed on the side of the first support film away from the first straight portion, and the second component is disposed in the bending area of ​​the display panel. The second component has a portion of its surface near the first component in contact with the first end face. At least a portion of the outer surface of the second component away from the first component is configured as a contouring curved surface. The second component has a plurality of grooves, and the openings of the grooves are located on the contouring curved surface. A filling layer, at least located in the bending area, is situated between the second component and the bending portion and at least fills the plurality of grooves.

2. The display module according to claim 1, characterized in that, Also includes: The first adhesive layer is located between the first support film and the first component; Preferably, the display module further includes a buffer layer, which is disposed on the side of the first support film away from the first flat portion, and the orthographic projection of the buffer layer on the first support film does not overlap with the orthographic projection of the first component on the first support film; Preferably, the display module further includes a second adhesive layer located between the buffer layer and the first component; Preferably, the display module further includes a shim block, which is disposed on the side of the buffer layer opposite to the first flat portion, and the orthographic projection of the shim block on the first support film does not overlap with the orthographic projection of the first component on the first support film; Preferably, the end face of the shim block near the first component is flush with the end face of the buffer layer near the first component, and a second adhesive layer is provided between the shim block and the first component; Preferably, the display module further includes a second support film disposed on the side of the first component opposite to the first support film; The display module further includes a third adhesive layer located between the second support film and the first component; Preferably, at least one of the first adhesive layer, the second adhesive layer, and the third adhesive layer is made of a mesh adhesive.

3. The display module according to claim 1, characterized in that, The first component and the second component are connected to each other in a first direction; Preferably, the cross-sectional shape of the second component in the second direction includes a semi-circular or semi-elliptical shape, wherein the second direction is perpendicular to the first direction; and / or, the cross-sectional shape of the first component in the second direction includes a rectangle; Preferably, the surface of the second component near the first component includes a first plane, and the surface of the first component near the second component includes a second plane, with a portion of the first plane and the second plane in contact; Preferably, the first component and the second component are integrally formed; Preferably, the cross-sectional shape of the groove in the second direction includes at least one of a semi-circle, a semi-ellipse, a cone, or a polygon; Preferably, the cross-sectional shape of the groove in the second direction includes a semicircle, the radius of which is greater than or equal to 10 μm and less than or equal to 50 μm; Preferably, the openings of the plurality of grooves are evenly distributed on the contoured surface; Preferably, the contoured part is in contact with the filling layer; Preferably, the orthographic projection of the filling layer in the first direction covers the orthographic projection of the contouring element in the first direction.

4. The display module according to claim 1, characterized in that, The filler layer is made of cured reinforcing adhesive; Preferably, the material of the filler layer includes at least one of epoxy photocurable adhesive, epoxy thermocurable adhesive, acrylic photocurable adhesive, or acrylic thermocurable adhesive.

5. The display module according to claim 1, characterized in that, Also includes: A second support membrane is disposed on the side of the first component opposite to the first support membrane, and the second support membrane includes a second end face near the bent portion; The second end face contacts the outer surface of the second component near the first component. Preferably, the second end face is flush with the first end face.

6. The display module according to claim 1, characterized in that, Also includes: A polarizing layer and a cover plate are stacked sequentially on the display side of the first flat section; Preferably, the display module further includes a fourth adhesive layer located between the polarizing layer and the cover plate.

7. A method for assembling a display module, characterized in that, include: A display panel before bending is provided, the display panel comprising a first straight portion, a portion to be bent, and a second straight portion connected in sequence; A first support film is attached to the non-display side of the first straight portion, and the first support film includes a first end face near the portion to be bent. A contouring component is attached to the side of the first support film opposite to the first straight portion. The contouring component includes a first component and a second component that are connected to each other. The orthographic projection of the first component on the display panel before bending is located on the first straight portion, and the orthographic projection of the second component on the display panel before bending is located on the portion to be bent. The second component has a portion of its surface near the first component in contact with the first end face. At least a portion of the outer surface of the second component opposite to the first component is configured as a contoured curved surface. The second component has a plurality of grooves, and the openings of the grooves are located on the contoured curved surface. The part to be bent is bent to form a bent part; A filler material is filled between the second component and the bent portion, the filler material being in contact with the contoured part and filling at least the plurality of grooves.

8. The assembly method of the display module according to claim 7, characterized in that, While attaching the first support film to the non-display side of the first flat portion, the method further includes: A second support film is attached to the second straight portion. The second support film and the first support film are disposed on the same side. The second support film includes a second end face near the portion to be bent. The second end face contacts the outer surface of the second component near the first component.

9. The assembly method of the display module according to claim 8, characterized in that, The method further includes: The material used to fill the space between the first support film and the first component is the material of the first adhesive layer; The material used to fill the first adhesive layer between the first support film and the first component includes: The material of the first adhesive layer is filled between the first support film and the first component using a dispensing process; Preferably, the method further includes: providing a buffer layer on the side of the first support film away from the substrate, wherein the orthographic projection of the buffer layer on the first support film does not overlap with the orthographic projection of the first component on the first support film; and filling the space between the buffer layer and the first component with the material of the first adhesive layer; Preferably, the method further includes: filling the space between the second support film and the first component with the material of the first adhesive layer; Preferably, the material of the first adhesive layer is in a semi-fluid state.

10. A display device, characterized in that, The display module includes the display module according to any one of claims 1 to 6, or the display module assembled by the assembly method of the display module according to any one of claims 7 to 9.

Images