Display device and manufacturing method

Abstract

Embodiments of the present application provide a display device and a preparation method. The display device comprises a display panel, a protective adhesive layer, a cover plate and a protection assembly. The display panel comprises a display part, a bonding part and a bending part. The display part and the bonding part are connected through the bending part. The protective adhesive layer is arranged on the outer side of the bending part. The cover plate is arranged on one side of the display panel in a second direction. The protection assembly is arranged on the side of the cover plate away from the display panel. The first protection layer comprises a first region and a second region connected along a first direction. The second protection layer is located in the first region. The superimposed first protection layer and second protection layer help to enhance the overall stiffness of the protection assembly and improve the problem of deformation of the cover plate assembly under the action of its own weight. The second protection layer is located in the first region. At least part of the protective adhesive layer is located in the second region in the orthographic projection in the second direction. The risk of adhesion of the corresponding part of the cover plate and the protective adhesive layer in the second region is further reduced.

Description

Technical Field

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

[0002] Organic light-emitting diode (OLED) and flat panel display devices based on light-emitting diode (LED) technologies are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body and wide range of applications, becoming the mainstream of display devices.

[0003] In related technologies, during the processing of foldable display devices, when the cover plate and the display panel are bonded together, because the cover plate is made of a flexible material, it is easy for the cover plate to stick to the protective adhesive layer of the display panel under its own weight, which affects the subsequent bonding process of the display panel and results in insufficient processing yield of the display device. Summary of the Invention

[0004] This application provides a display device and a manufacturing method, aiming to reduce the risk of adhesion between the cover plate and the protective adhesive layer when the cover plate and the display panel are bonded, and to improve the processing yield of the display device.

[0005] An embodiment of the first aspect of this application provides a display device, comprising: a display panel including a display portion, a bonding portion, and a bending portion, the display portion and the bonding portion being connected via the bending portion, the bending portion being connected to one end of the display portion in a first direction; a protective adhesive layer disposed on the outside of the bending portion; a cover plate disposed on one side of the display panel in a second direction, the first direction and the second direction intersecting, the orthographic projections of the display portion and the protective adhesive layer in the second direction both being located within the cover plate; and a protective assembly disposed on the side of the cover plate away from the display panel, the protective assembly including a first protective layer and a second protective layer stacked thereon, the first protective layer being disposed between the second protective layer and the cover plate, the first protective layer including a first region and a second region connected along the first direction, the second protective layer being located within the first region, the orthographic projection of the display portion in the second direction being located within the second protective layer, and at least a portion of the orthographic projection of the protective adhesive layer in the second direction being located within the second region.

[0006] According to an embodiment of the first aspect of this application, the second protective layer has at least one edge in the third direction, and / or the edge of the second protective layer facing away from the second region in the first direction is flush with the edge of the first protective layer, and the first direction, the second direction and the third direction intersect each other.

[0007] According to the embodiment of the first aspect of this application, the dimension L of the second region in the first direction satisfies L≥1mm.

[0008] According to the embodiment of the first aspect of this application, L≤2mm.

[0009] According to an embodiment of the first aspect of this application, the thickness of the second protective layer is greater than the thickness of the first protective layer.

[0010] According to the first aspect of the present application, the stiffness of the first protective layer is S1 and the stiffness of the second protective layer is S2, which satisfy S2 > S1.

[0011] According to an embodiment of the first aspect of this application, at least a portion of the edge of the first protective layer is located within the cover plate.

[0012] According to the embodiment of the first aspect of this application, the minimum distance D from the edge of the first protective layer to the edge of the cover plate satisfies D≥0.5mm.

[0013] According to an embodiment of the first aspect of this application, the second protective layer includes a first surface, a second surface, and a side surface that are interconnected. The first surface and the second surface are disposed opposite to each other along a second direction. The second surface is connected to the first protective layer. The side surface is disposed on the side of the second protective layer that is close to the second region in the first direction. Along the direction close to the second region, the distance between the side surface and the first protective layer in the second direction gradually decreases.

[0014] According to an embodiment of the first aspect of this application, the first protective layer includes a body and a support portion, the support portion being disposed in the second region.

[0015] According to an embodiment of the first aspect of this application, the support portion is disposed on the side of the body away from the cover plate.

[0016] The second aspect of this application provides a manufacturing method for manufacturing the display device of the first aspect embodiment described above. The manufacturing method includes:

[0017] A cover plate is provided, with a protective component on one side of the cover plate;

[0018] The display panel is positioned along the second direction on the support surface of the fitting fixture;

[0019] The cover plate is attached to the side of the display panel that is away from the support surface.

[0020] According to an embodiment of the second aspect of this application, the display panel is disposed in front of the support surface of the fitting fixture.

[0021] A support layer is installed on the support surface;

[0022] The display panel is positioned within the support surface of the fitting fixture.

[0023] The orthographic projection of the first region onto the support surface lies within the support layer. The edge of the support layer facing the second region in the first direction is flush with the edge of the first region, or the edge of the support layer facing the second region in the first direction lies between the two edges of the second region in the first direction.

[0024] In the display device and manufacturing method provided in the embodiments of this application, the display device includes a display panel, a protective adhesive layer, a cover plate, and a protective component. The display panel includes a display portion, a bonding portion, and a bending portion. The display portion and the bonding portion are connected through the bending portion, which is connected to one end of the display portion in a first direction. The protective adhesive layer is disposed on the outside of the bending portion to reduce fatigue damage to the flexible substrate and metal circuitry. The cover plate is disposed on one side of the display panel in a second direction. The orthographic projections of the display portion and the protective adhesive layer in the second direction are both located inside the cover plate, which provides protection for the display panel. The protective component is disposed on the side of the cover plate away from the display panel to reduce the risk of impact and scratches to the cover plate. The protective component includes a first protective layer and a second protective layer stacked together. The first protective layer is disposed between the second protective layer and the cover plate. A protective layer includes a first region and a second region connected along a first direction. At least a portion of the protective adhesive layer is projected onto the second region in the second direction. The second protective layer is located within the first region. The projection of the display unit onto the second protective layer in the second direction is located within the second protective layer. The first protective layer covers the cover plate to fully protect it. The stacked first and second protective layers help enhance the overall rigidity of the protective assembly, improve the deformation problem of the cover plate assembly under its own weight, and reduce the risk of adhesion between the cover plate and the protective adhesive layer. The second protective layer is located within the first region, and at least a portion of the protective adhesive layer is projected onto the second region in the second direction. This avoids the bonding pressure acting directly on the second region, further reducing the risk of adhesion between the cover plate and the protective adhesive layer in the corresponding part of the second region, and helps improve the processing yield of the display device. Attached Figure Description

[0025] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar features.

[0026] Figure 1 This is a schematic diagram of the structure of a display device in one embodiment;

[0027] Figure 2 This is a schematic diagram of the structure of a protective component of a display device in one embodiment;

[0028] Figure 3 This is a schematic diagram of the protective assembly of the display device in another embodiment;

[0029] Figure 4 A schematic diagram of the structure of a protective component of a display device in one embodiment.

[0030] Figure 5 This is a flowchart of the preparation method provided in the embodiments of this application;

[0031] Figure 6 This is a schematic diagram of the preparation method provided in the embodiments of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100. Display device;

[0034] 110. Display panel; 111. Display section; 112. Bonding section; 113. Bending section;

[0035] 120. Protective adhesive layer;

[0036] 130. Cover plate;

[0037] 140. Protective components;

[0038] 150. First protective layer; 151. First area; 152. Second area; 153. Main body; 154. Supporting part;

[0039] 160. Second protective layer; 161. First surface; 162. Second surface; 163. Side surface;

[0040] 200. Fitting fixture; 210. Support surface; 220. Support layer;

[0041] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0042] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0043] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a display device in one embodiment.

[0046] like Figure 1 As shown, an embodiment of the first aspect of this application provides a display device 100, which includes a display panel 110, a protective adhesive layer 120, a cover plate 130, and a protective assembly 140. The display panel 110 includes a display portion 111, a bonding portion 112, and a bending portion 113. The display portion 111 and the bonding portion 112 are connected by the bending portion 113, which is connected to one end of the display portion 111 in a first direction X. The protective adhesive layer 120 is disposed on the outside of the bending portion 113. The cover plate 130 is disposed on one side of the display panel 110 in a second direction Y, where the first direction X and the second direction Y intersect. The display portion 111 and the protective adhesive layer 120 are connected by a protective assembly 140. The orthographic projection of 0 in the second direction Y is located within the cover plate 130; the protective component 140 is disposed on the side of the cover plate 130 away from the display panel 110, the protective component 140 includes a first protective layer 150 and a second protective layer 160 stacked together, the first protective layer 150 is disposed between the second protective layer 160 and the cover plate 130, the first protective layer 150 includes a first region 151 and a second region 152 connected along the first direction X, the second protective layer 160 is located within the first region 151, the orthographic projection of the display part 111 in the second direction Y is located within the second protective layer 160, and at least a portion of the protective adhesive layer 120 is located within the second region 152 in the orthographic projection of the second direction Y.

[0047] In the display device 100 and manufacturing method provided in the embodiments of this application, the display device 100 includes a display panel 110, a protective adhesive layer 120, a cover plate 130, and a protective assembly 140. The display panel 110 includes a display portion 111, a bonding portion 112, and a bending portion 113. The display portion 111 and the bonding portion 112 are connected through the bending portion 113. The bending portion 113 is connected to one end of the display portion 111 in a first direction X. The protective adhesive layer 120 is disposed on the outside of the bending portion 113 to reduce fatigue stress on the flexible substrate and the metal circuit. To prevent wear and tear, a cover plate 130 is disposed on one side of the display panel 110 in the second direction Y. The orthogonal projections of the display part 111 and the protective adhesive layer 120 in the second direction Y are both located within the cover plate 130, which serves to protect the display panel 110. A protective component 140 is disposed on the side of the cover plate 130 away from the display panel 110 to reduce the risk of the cover plate 130 being bumped or scratched. The protective component 140 includes a first protective layer 150 and a second protective layer 160 stacked on top of each other. The first protective layer 150 is disposed on top of the second protective layer 160. Between the cover plate 130 and the cover plate 130, the first protective layer 150 includes a first region 151 and a second region 152 connected along the first direction X. At least a portion of the protective adhesive layer 120 has its orthographic projection in the second direction Y located within the second region 152. The second protective layer 160 is located within the first region 151. The orthographic projection of the display unit 111 in the second direction Y is located within the second protective layer 160. The first protective layer 150 covers the cover plate 130 to adequately protect the cover plate 130. The stacked first protective layer 150 and second protective layer 160 help to enhance protection. The overall rigidity of component 140 improves the deformation problem of cover plate 130 component under its own weight, and reduces the risk of cover plate 130 and protective adhesive layer 120 sticking together; the second protective layer 160 is located in the first region 151, and at least part of the protective adhesive layer 120 is located in the second region 152 in the second direction Y, avoiding the bonding pressure from acting directly on the second region 152, further reducing the risk of the cover plate 130 and protective adhesive layer 120 sticking together in the second region 152, which helps to improve the processing yield of display device 100.

[0048] The first aspect of this application provides a display device 100, which may be a mobile phone, tablet computer, desktop computer, laptop computer, handheld computer, notebook computer, ultra-mobile personal computer (UMPC), netbook, as well as cellular phone, personal digital assistant (PDA), augmented reality (AR) device, virtual reality (VR) device, artificial intelligence (AI) device, wearable device, in-vehicle device, smart home device and / or smart city device. This application does not impose any special restrictions on the specific type of the display device 100.

[0049] The display device 100 includes a display panel 110, which is used to display text, images, videos, etc. For example, the display panel 110 may be an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode (MLED) display, a micro organic light-emitting diode (MLED) display, a quantum dot light-emitting diode (QLED) display, etc.

[0050] The display panel 110 is a flexible display panel. The substrate in the flexible display panel is made of a flexible substrate material. The flexible substrate material may include one or more of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or polyimide (PI), etc. The embodiments of this application do not limit this.

[0051] The display panel 110 includes a display section 111, a bonding section 112, and a bending section 113. The display section 111 and the bonding section 112 are connected via the bending section 113, which is connected to one end of the display section 111 in a first direction X. The display section 111 is used to display to the user, and the bending section 113 is the part of the display panel 110 that enables bending. The bonding area is adjacent to the bending section 113. The bonding section 112 can be used to bond areas such as integrated circuits (ICs) and flexible printed circuits (FPCs) to achieve connection and communication with other components.

[0052] The display panel 110 includes a first side and a second side disposed opposite to each other. Specifically, the first side and the second side refer to opposite sides along the thickness direction of the display panel 110. The first side of the display panel 110 is the light-emitting side of the display panel 110, and the second side of the display panel 110 is the non-light-emitting side of the display panel 110. The bonding portion 112 is bent to the second side (non-light-emitting side) of the display portion 111 via the bending portion 113.

[0053] The protective adhesive layer 120 is disposed on the outside of the bending portion 113. The protective adhesive layer 120 is BPL (Bending Protection Layer) adhesive. The protective adhesive layer 120 disposed on the bending portion 113 can isolate the metal circuit from external impurities, moisture and other corrosion, absorb the deformation stress in the bending area, reduce the risk of metal circuit breakage, and improve the overall mechanical strength and impact resistance of the display panel 110.

[0054] For example, the protective adhesive layer 120 can be polyimide, polydimethylsiloxane, liquid crystal polymer, etc.

[0055] The display device 100 includes a cover plate 130, which is made of a transparent material. Images, pictures, or videos displayed on the display surface of the display panel 110 can be viewed by the user through the cover plate 130, and the cover plate 130 protects the display panel 110 from damage. For example, the cover plate 130 is made of PET (Polyethylene terephthalate).

[0056] In related technologies, the transparent cover plate 130, with its orthographic projection in the thickness direction, covers the display portion 111 and the bent portion 113. That is, the cover plate 130 and at least part of the protective adhesive layer 120 are positioned opposite each other. Thus, during the bonding process between the cover plate 130 and the display panel 110, the flexible cover plate 130 bends towards the display panel 110 under its own weight. The edge of the cover plate 130 easily comes into contact with and adheres to the protective adhesive layer 120, hindering the subsequent bonding process.

[0057] A protective component 140 is disposed on the side of the cover plate 130 opposite to the display panel 110. The protective component 140 may be a plastic film layer made of organic material. The protective component 140 can enhance the bendability and scratch resistance of the cover plate 130 and form a smooth surface of the display device 100.

[0058] The protective assembly 140 includes a first protective layer 150 and a second protective layer 160 stacked together. The first protective layer 150 is in direct contact with the cover plate 130, and the second protective layer 160 is disposed on the side of the first protective layer 150 opposite to the cover plate 130. A bonding mechanism (e.g., a pressure roller) acts directly on the second protective layer 160 to apply a bonding force to the cover plate 130 and the display panel 110.

[0059] Optionally, both the first protective layer 150 and the second protective layer 160 are transparent materials, and the materials of the first protective layer 150 and the second protective layer 160 may be the same or different. For example, the material of the first protective layer 150 or the second protective layer 160 may be polyimide, polyester film, cyclic olefin polymer, etc.

[0060] Optionally, the first protective layer 150 and the second protective layer 160 are two independent film layers to facilitate adjustment of the materials and dimensions of the first protective layer 150 and the second protective layer 160.

[0061] Specifically, the first protective layer 150 includes a first region 151 and a second region 152 along the first direction X, the second protective layer 160 is located in the first region 151, the display part 111 corresponds to the first region 151, the display part 111 and the second region 152 are spaced apart along the first direction X, so that the bonding mechanism applies pressure to the first region 151 through the second region 152, so that the display part 111 and the cover plate 130 are fully bonded.

[0062] Optionally, the orthographic projection of the display unit 111 onto the first protective layer 150 is located within the first region 151, and the orthographic projection of the second protective layer 160 overlaps with the first region 151, so that when the bonding mechanism acts on the second protective layer 160, the cover plate 130 and the display unit 111 are fully bonded.

[0063] Since the second protective layer 160 is only located in the first region 151, and the bonding mechanism only acts directly on the second protective layer 160, the portion of the cover plate 130 corresponding to the second region 152 will not be subjected to the direct force of the bonding mechanism.

[0064] Specifically, the first region 151 and the second region 152 are arranged along the first direction X. At least a portion of the protective adhesive layer 120 has its orthographic projection in the second direction Y located within the second region 152. The second region 152 corresponds to the edge of the cover plate 130 near the bend 113 along the first direction X. The edge region experiences severe deformation and a high risk of adhesion of the protective adhesive layer 120. Therefore, the adhesion problem between the cover plate 130 and the protective adhesive layer 120 can be improved when the second region 152 is not directly subjected to force.

[0065] Optionally, the protective component 140 includes a first protective layer 150 and a second protective layer 160 stacked together. Compared with the prior art scheme of setting a single protective layer, the protective component 140 in this embodiment has higher stiffness, which helps to improve the deformation problem of the cover plate 130 and reduce the risk of contact and adhesion between the cover plate 130 and the protective adhesive layer.

[0066] For example, the first protective layer 150 and / or the second protective layer 160 are 75-micron PET film layers.

[0067] Optionally, the specific shape of the second region 152 can be designed by the user. For example, the second region 152 can be rectangular, curved, parallelogram, etc.

[0068] Optionally, the first protective layer 150 and the second protective layer 160 are bonded together by means of transparent adhesive bonding or electrostatic adsorption to improve the reliability of the protective component 140.

[0069] Optionally, the protective component 140 may also include other transparent protective layers, which may be disposed between the first protective layer 150 and the second protective layer 160 and both located within the first region 151, to further enhance the rigidity of the protective component 140.

[0070] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of a protective component of a display device in one embodiment.

[0071] In some embodiments, such as Figure 1 and Figure 2 As shown, the second protective layer 160 has at least one edge in the third direction Z, and / or the edge of the second protective layer 160 opposite to the second region 152 in the first direction X is flush with the edge of the first protective layer 150, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0072] In these embodiments, by providing the second protective layer 160 at least on one side edge in the third direction Z, and / or by having the second protective layer 160 flush with the edge of the first protective layer 150 on one side edge away from the second region 152 in the first direction X, the external bonding mechanism can fully bond the cover plate 130 and the display panel 110 through the second protective layer 160.

[0073] For example, the first direction X and the third direction Z are the length and width directions of the display device 100, respectively, and the second direction Y is the thickness direction of the display device 100.

[0074] Optionally, the edge of the second protective layer 160 is flush with the edge of the first region 151 of the first protective layer 150. This allows the second protective layer 160 to apply pressure to a larger area of ​​the first region 151 when the bonding mechanism applies bonding pressure directly to the second protective layer 160. This enables the bonding mechanism to apply uniform bonding pressure to a larger area of ​​the cover plate 130 through the protective component 140, thereby improving the bonding reliability between the cover plate 130 and the display panel 110.

[0075] In some embodiments, such as Figure 1 and Figure 2 As shown, the dimension L of the second region 152 in the first direction X satisfies L≥1mm.

[0076] In these embodiments, when the dimension L of the second region 152 in the first direction X satisfies the above conditions, the edge of the cover plate 130 corresponding to the second region 152 can be prevented from being directly subjected to bonding pressure, thereby reducing the deformation of the edge of the cover plate 130, improving the bonding problem between the cover plate 130 and the protective adhesive layer 120, and enabling the cover plate 130 to obtain sufficient bonding pressure to bond with the display panel 110, thereby improving the bonding reliability between the cover plate 130 and the display panel 110.

[0077] In some embodiments, such as Figure 1 and Figure 2 As shown, the dimension L of the second region 152 in the first direction X satisfies L≤2mm. For example, the dimension of the second region 152 in the first direction X is 1mm, 1.5mm, 2mm, etc.

[0078] In some embodiments, such as Figure 1 As shown, the thickness of the second protective layer 160 is greater than the thickness of the first protective layer 150.

[0079] In these embodiments, the thickness of the second protective layer 160 is greater than the thickness of the first protective layer 150. By setting a thicker second protective layer 160, the overall rigidity of the protective component 140 is enhanced, thereby improving the problems of edge deformation of the cover plate 130 and adhesion of the protective adhesive layer 120 during the bonding process of the cover plate 130 and the display panel 110, and improving the processing yield of the display device 100.

[0080] For example, the thickness of the first protective layer 150 is 75 micrometers, the thickness of the second protective layer 160 is 80 micrometers, or the thickness of the second protective layer 160 is 85 micrometers, or the thickness of the second protective layer 160 is 90 micrometers, or the thickness of the second protective layer 160 is 100 micrometers.

[0081] Optionally, the thickness of the second protective layer 160 is greater than the thickness of the first protective layer 150, in order to reduce the size of the thicker second protective layer 160 and save on the material cost of the entire protective assembly 140.

[0082] In some embodiments, such as Figure 1 As shown, the stiffness S1 of the first protective layer 150 and the stiffness S2 of the second protective layer 160 satisfy S2 > S1.

[0083] In these embodiments, by providing a second protective layer 160 with greater stiffness on the side of the first protective layer 150 away from the cover plate 130, the overall stiffness of the protective component 140 can be improved by the second protective layer 160, thereby improving the problems of edge deformation of the cover plate 130 and adhesion of the protective adhesive layer 120 during the bonding process between the cover plate 130 and the display panel 110. At the same time, the risk of damage to the cover plate 130 is reduced due to direct contact between the harder second protective layer 160 and the cover plate 130.

[0084] Optionally, the first protective layer 150 is made of a flexible, elastic material. This elastic first protective layer 150 can buffer external pressure acting on the cover plate 130, reducing the risk of damage to the cover plate 130, and ensuring that the first protective layer 150 can bend with the cover plate 130. For example, the first protective layer 150 can be made of thermoplastic elastic material or silicone material. For instance, the material of the first protective layer 150 can be thermoplastic polyurethanes (TPU). This TPU material has advantages such as wear resistance, oil resistance, transparency, and good elasticity, and can effectively dissipate the energy of stress waves.

[0085] The elastic modulus and thickness of the first protective layer 150 can be designed according to actual conditions. For example, the elastic modulus of the first protective layer 150 is 10MPa to 500MPa, such as 50MPa or 300MPa. The thickness of the first protective layer 150 is 10μm to 75μm, such as 10μm, 50μm, or 75μm.

[0086] Optionally, the second protective layer 160 is made of a material with high stiffness and bendability. The second protective layer 160 can reflect and scatter external forces to reduce the forces acting on the first protective layer 150.

[0087] The material of the second protective layer 160 may include one or more of the following polymer materials: polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate dimethyl methacrylate (PEN), poly(p-phenylene terephthalamide) (Aramid), polyamide (PA), polycarbonate (PC), polyethylene (PE), and polymethyl methacrylate (PMMA).

[0088] Optionally, the thickness of the second protective layer 160 is greater than that of the first protective layer 150, thereby further improving the stiffness of the second protective layer 160.

[0089] Optionally, the stiffness of the second protective layer 160 can be obtained using a bending stiffness tester.

[0090] In some embodiments, such as Figure 1 and Figure 2 As shown, at least a portion of the edge of the first protective layer 150 is located within the cover plate 130.

[0091] In these embodiments, at least a portion of the edge of the first protective layer 150 is located within the cover plate 130 to reduce the risk that the first protective layer 150 may adhere to the outside of the cover plate 130 due to misalignment between the first protective layer 150 and the cover plate 130.

[0092] In some embodiments, such as Figure 1 and Figure 2As shown, the minimum distance D from the edge of the first protective layer 150 to the edge of the cover plate 130 satisfies D≥0.5mm, which means that the first protective layer 150 can fully cover the cover plate 130, while reducing the risk of the first protective layer 150 sticking to the outside of the cover plate 130.

[0093] Optionally, the minimum distance D from the edge of the first protective layer 150 to the edge of the cover plate 130 satisfies D≤1mm. For example, the minimum distance D from the edge of the first protective layer 150 to the edge of the cover plate 130 can be 0.5mm, 0.6mm, 0.75mm, 1.0mm, etc.

[0094] Optionally, the edges of the first protective layer 150 in the first direction X and the third direction Z are all located within the cover plate 130.

[0095] Please see Figure 3 , Figure 3 This is a schematic diagram of the protective component of the display device in another embodiment.

[0096] In some embodiments, such as Figure 1 and Figure 3 As shown, the second protective layer 160 includes a first surface 161, a second surface 162, and a side surface 163 that are interconnected. The first surface 161 and the second surface 162 are disposed opposite each other along the second direction Y. The second surface 162 is connected to the first protective layer 150. The side surface 163 is disposed on the side of the second protective layer 160 near the second region 152 in the first direction X. Along the direction near the second region 152, the distance between the side surface 163 and the first protective layer 150 in the second direction Y gradually decreases.

[0097] In these embodiments, the side 163 is disposed on the side of the second protective layer 160 near the second region 152 in the first direction X. Along the direction near the second region 152, the distance between the side 163 and the first protective layer 150 in the second direction Y gradually decreases to form a transition zone, so as to disperse the compressive stress exerted on the first protective layer 150 by the edge region of the second protective layer 160, avoid stress concentration, and reduce the risk of damage to the protective component 140 and the cover plate 130.

[0098] Specifically, the second protective layer 160 includes a first surface 161 and a second surface 162 disposed opposite to each other. The first surface 161 is attached to the first protective layer 150, and the second surface 162 faces the external environment. A side surface 163 is disposed at one end of the second protective layer 160 facing the second region 152. The side surface 163 includes a first end and a second end disposed opposite to each other. The first end is connected to the first surface 161, and the second end extends toward the second region 152 along the thickness direction and is connected to the second surface 152. The side surface 163 is inclined so that the distance between the side surface 163 and the first protective layer 150 gradually decreases along the second direction Y in the direction close to the second region 152.

[0099] Optionally, side 163 may be an inclined plane or side 163 may be stepped.

[0100] Please see Figure 4 , Figure 4 This is a schematic diagram of the protective component of the display device in another embodiment.

[0101] In some embodiments, such as Figure 1 and Figure 4 As shown, the first protective layer 150 includes a body 153 and a support portion 154, with the support portion 154 disposed within the second region 152.

[0102] In these embodiments, the first protective layer 150 includes a support portion 154 disposed within the second region 152 by the body 153. The support portion 154 increases the stiffness of the second region 152, which helps to reduce the deformation of the cover plate 130 corresponding to the second region 152 and improves the adhesion between the cover plate 130 and the protective adhesive layer 120.

[0103] Optionally, the body 153 and the support portion 154 are separately manufactured using different materials. The body 153 and the support portion 154 are connected along the first direction X. The body 153 is located in the first region 151, and the support portion 154 is located in the second region 152. The stiffness of the support portion 154 is greater than that of the body 153 to enhance the stiffness of the second region 152. Alternatively, the support portion 154 and the body 153 are integrally formed. The support portion 154 is a protrusion that protrudes from the surface of the body 153 and extends along the first direction X. The support portion 154 acts as a reinforcing rib to enhance the stiffness of the second region 152. For example, the support portion 154 is strip-shaped or column-shaped. Alternatively, the support portion 154 and the body 153 are separately formed. The support portion 154 is attached to the surface of the body 153 and is a protrusion that extends along the first direction X. The support portion 154 acts as a reinforcing rib to enhance the stiffness of the second region 152.

[0104] Considering that the bonding mechanism will not directly apply pressure to the second region 152, even if the support part 154 is provided in the second region 152, the support part 154 will not damage the cover plate 130.

[0105] Optionally, the dimension of the support portion 154 in the second direction Y should be smaller than the thickness of the second protective layer 160 to avoid the support portion 154 hindering the peeling of the second protective layer 160.

[0106] In some embodiments, such as Figure 1 and Figure 4 As shown, the support part 154 is provided on the side of the body 153 away from the cover plate 130.

[0107] In these embodiments, the support portion 154 is disposed on the side of the body 153 away from the cover plate 130 to facilitate the fitting of the first protective layer 150 and the cover plate 130.

[0108] Optionally, the support portion 154 and the body 153 are integrally formed, the support portion 154 protrudes from the surface of the body 153 away from the cover plate 130, and the support portion 154 can be a strip-shaped protrusion extending continuously along the first direction X.

[0109] Optionally, the support portion 154 and the body 153 are formed separately. The support portion 154 is a support strip extending along the first direction X, and the support strip is connected to the surface of the body 153 opposite to the cover plate 130. For example, the connection method between the support strip and the body 153 can be bonding or welding. Optionally, the stiffness of the support portion 154 is greater than that of the body 153 to effectively support the second region 152.

[0110] Please see Figure 5 and Figure 6 , Figure 5 This is a flowchart of the preparation method provided in the embodiments of this application; Figure 6 This is a schematic diagram of the preparation method provided in the embodiments of this application.

[0111] like Figure 1 , Figure 5 and Figure 6 As shown, an embodiment of the second aspect of this application provides a manufacturing method for manufacturing the display device 100 of the first aspect embodiment described above. The manufacturing method includes:

[0112] Step S1: Provide a cover plate 130, and a protective component 140 is provided on one side of the cover plate 130;

[0113] Step S2: The display panel 110 is positioned on the support surface 210 of the fitting fixture 200 along the second direction Y;

[0114] Step S3: Attach the cover plate 130 to the side of the display panel 110 that is away from the support surface 210.

[0115] In the preparation method provided in the embodiments of this application, the cover plate 130 is attached to the side of the display panel 110 away from the support surface 210. Since a protective component 140 of the first aspect embodiment of this application is provided on one side of the cover plate 130, the protective component 140 includes a first protective layer 150 and a second protective layer 160 stacked together. The first protective layer 150 is disposed between the second protective layer 160 and the cover plate 130. The first protective layer 150 includes a first region 151 and a second region 152 connected along the first direction X. At least a portion of the protective adhesive layer 120 is located in the second region 152 in the orthographic projection of the second direction Y. The second protective layer 160 is located in the first region 151. The display part 111 is located in the first region 152 in the orthographic projection of the second direction Y. The two protective layers 160 are as follows: the first protective layer 150 covers the cover plate 130 to fully protect the cover plate 130; the stacked first protective layer 150 and second protective layer 160 help to enhance the overall rigidity of the protective component 140, improve the problem of deformation of the cover plate 130 component under its own weight, and reduce the risk of adhesion between the cover plate 130 and the protective adhesive layer 120; the second protective layer 160 is located in the first region 151, and at least part of the protective adhesive layer 120 is located in the second region 152 in the orthogonal projection of the second direction Y, avoiding the bonding pressure from acting directly on the second region 152, further reducing the risk of adhesion between the cover plate 130 and the protective adhesive layer 120 corresponding to the second region 152, and helping to improve the processing yield of the display device 100.

[0116] Optionally, a protective film layer is typically provided on the side of the cover plate 130 facing away from the protective component 140 to reduce the risk of damage to the cover plate 130 from external forces during storage and transportation. In step S3, the protective film layer needs to be removed to prevent it from interfering with the adhesion between the cover plate 130 and the display panel 110.

[0117] Optionally, the fitting fixture 200 includes a support surface 210 on the Y side in the second direction. The support surface 210 is flat, and the display panel 110 is placed on the support surface 210.

[0118] Optionally, the support surface 210 forms a groove at one end near the bend 113 in the first direction X. This groove can be positioned directly opposite the second region 152. The size of the groove in the third direction Z is greater than or equal to the size of the display panel 110 in the third direction Z, so that during the bonding process between the cover plate 130 and the display panel 110, a portion of the display panel 110 can enter the groove, further reducing the contact pressure between the cover plate 130 and the protective adhesive layer 120 and reducing the bonding risk between the cover plate 130 and the protective adhesive layer 120.

[0119] Optionally, before step S2, a protective adhesive layer 120 is placed on the bending portion 113 and the protective adhesive layer 120 is cured to improve the stability of the protective adhesive layer 120.

[0120] In step S3, pressure is applied to the second protective layer by a bonding mechanism to bond the cover plate 130 and the display panel 110 together. For example, the bonding mechanism is a pressure roller, which presses the second protective layer to bond the cover plate 130 and the display panel 110 together.

[0121] After step S3, the display device 100 is flipped to bond the display panel 110.

[0122] In some embodiments, such as Figure 1 , Figure 5 and Figure 6 As shown, before step S2,

[0123] A support layer 220 is provided on the support surface 210;

[0124] In step S2,

[0125] The orthographic projection of the first region 151 onto the support surface 210 is located within the support layer 220. The edge of the support layer 220 facing the second region 152 in the first direction X is flush with the edge of the first region 151, or the edge of the support layer 220 facing the second region 152 in the first direction X is located between the two edges of the second region 152 in the first direction X.

[0126] In these embodiments, the orthographic projection of the first region 151 onto the support surface 210 is located within the support layer 220. The edge of the support layer 220 facing the second region 152 in the first direction X is flush with the edge of the first region 151, or the edge of the support layer 220 facing the second region 152 in the first direction X is located between the two edges of the second region 152 in the first direction X. By providing the support layer 220 on the support surface 210, a receiving space is formed between the display panel 110 and the support surface 210, so that during the bonding process between the cover plate 130 and the display panel 110, part of the display panel 110 can enter the receiving space, further reducing the contact pressure between the cover plate 130 and the protective adhesive layer 120 and reducing the bonding risk between the cover plate 130 and the protective adhesive layer 120.

[0127] Optionally, the support layer 220 can be made of the same material and have the same dimensions as the second protective layer 160, thus reusing the second protective layer 160 and reducing the processing cost of the support layer 220.

[0128] Optionally, the support layer 220 and the support surface 210 are detachably connected to facilitate adjustment and replacement of the support layer 220.

[0129] Optionally, the material and thickness of the support layer 220 can be designed independently. For example, the thickness of the support layer 220 can be 75 micrometers, 80 micrometers, 85 micrometers, etc. For example, the material of the support layer 220 can be polyimide, polyester film, cyclic olefin polymer, etc.

[0130] Optionally, the first region 151 of the first protective layer 150 is projected into the support layer 220 in the second direction Y, so as to avoid the risk that the edge of the support layer 220 will damage the display panel 110 during the process of the cover plate 130 being attached to the display panel 110.

[0131] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display device, characterized in that, include: A display panel includes a display portion, a bonding portion, and a bending portion, wherein the display portion and the bonding portion are connected via the bending portion, and the bending portion is connected to one end of the display portion in a first direction; A protective adhesive layer is disposed on the outside of the bent portion; A cover plate is disposed on one side of the display panel in a second direction, where the first direction and the second direction intersect, and the orthographic projection of the display part and the protective adhesive layer in the second direction is located within the cover plate; A protective component is disposed on the side of the cover plate away from the display panel. The protective component includes a first protective layer and a second protective layer stacked together. The first protective layer is disposed between the second protective layer and the cover plate. The first protective layer includes a first region and a second region connected along a first direction. The second protective layer is located within the first region. The orthographic projection of the display portion in the second direction is located within the second protective layer. At least a portion of the orthographic projection of the protective adhesive layer in the second direction is located within the second region.

2. The display device according to claim 1, characterized in that, The second protective layer has at least one edge in its third direction, and / or the edge of the second protective layer in the first direction opposite to the second region is flush with the edge of the first protective layer, and the first direction, the second direction and the third direction intersect each other.

3. The display device according to claim 1, characterized in that, The dimension L of the second region in the first direction satisfies L≥1mm; Preferably, L≤2mm.

4. The display device according to claim 1, characterized in that, The thickness of the second protective layer is greater than the thickness of the first protective layer.

5. The display device according to claim 1, characterized in that, The stiffness of the first protective layer is S1, and the stiffness of the second protective layer is S2, satisfying that S2 > S1.

6. The display device according to claim 1, characterized in that, At least a portion of the edge of the first protective layer is located within the cover plate; Preferably, the minimum distance D from the edge of the first protective layer to the edge of the cover plate satisfies D≥0.5mm.

7. The display device according to claim 1, characterized in that, The second protective layer includes a first surface, a second surface, and a side surface that are interconnected. The first surface and the second surface are disposed opposite each other along the second direction. The second surface is connected to the first protective layer. The side surface is disposed on the side of the second protective layer in the first direction that is close to the second region. Along the direction close to the second region, the distance between the side surface and the first protective layer gradually decreases along the second direction.

8. The display device according to claim 1, characterized in that, The first protective layer includes a body and a support portion, wherein the support portion is disposed in the second region; Preferably, the support portion is disposed on the side of the body opposite to the cover plate.

9. A preparation method, characterized in that, The method for preparing the display device according to any one of claims 1-8 comprises: A cover plate is provided, and a protective component is provided on one side of the cover plate; The display panel is positioned along the second direction on the support surface of the fitting fixture; The cover plate is attached to the side of the display panel that is away from the support surface.

10. The preparation method according to claim 9, characterized in that, The display panel is positioned in front of the support surface of the fitting fixture. A support layer is provided on the support surface; The display panel is positioned within the support surface of the fitting fixture. The first region is projected onto the support surface within the support layer, and the edge of the support layer facing the second region in the first direction is flush with the edge of the first region, or the edge of the support layer facing the second region in the first direction is located between the two edges of the second region in the first direction.

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