A laminated structure, electronic device and display module

Abstract

The application provides a laminated structure, an electronic device and a display module. The laminated structure comprises a laminated first transparent base film and an impact-resistant film. The impact-resistant layer of the impact-resistant film and the first adhesive layer are connected in layers. The thickness of the first adhesive layer is limited to between 6 microns and 20 microns, so that the thickness of the first adhesive layer connected with the impact-resistant layer is thin and not too soft. The first transparent base film is arranged on the not too soft impact-resistant layer and the first adhesive layer. The first transparent base film is relatively stable and is not prone to instability. Under the condition of repeated bending loading with a fixed bending radius, the stress / tensile strain of the first transparent base film is small, and the first transparent base film is not prone to crack and bending failure. The laminated structure has an impact-resistant layer, has good extrusion resistance and impact resistance, and is beneficial to improving reliability.

Description

Technical Field

[0001] This application relates to the field of foldable screen electronic product technology, and in particular to a stacked structure, electronic device and display module. Background Technology

[0002] Foldable screen devices offer a large display area when unfolded, and a compact, portable structure when closed. Lighter, thinner, more reliable, and flatter designs are the future trends for foldable screen devices. In related foldable screen devices, the display module consists of a cover, a display panel, and a support layer stacked sequentially. A protective film can be applied to the display module to improve reliability; this protective film can be formed by adding impact-resistant materials and adhesive layers to a transparent base film. However, after repeated bending, the transparent base film of the protective film is prone to cracking and bending failure. Utility Model Content

[0003] This application provides a laminated structure, an electronic device, and a display module. After repeated bending, the transparent base film in the laminated structure is not prone to cracking and bending failure.

[0004] The embodiments of this application adopt the following technical solutions: In a first aspect, embodiments of this application provide a laminated structure comprising a first transparent base film and an impact-resistant film stacked together. The impact-resistant film comprises an impact-resistant layer and a first adhesive layer; wherein the first transparent base film, the impact-resistant layer, and the first adhesive layer are stacked sequentially; or, the first transparent base film, the first adhesive layer, and the impact-resistant layer are stacked sequentially. The thickness of the first adhesive layer is greater than or equal to 6 micrometers and less than or equal to 20 micrometers.

[0005] The laminated structure provided in this application includes a first transparent base film and an impact-resistant film stacked sequentially, with the impact-resistant layer and a first adhesive layer in the impact-resistant film stacked and connected. The thickness of the first adhesive layer is limited to between 6 micrometers and 20 micrometers, making the thickness of the first adhesive layer connected to the impact-resistant layer thin but not too soft. The first transparent base film is placed on the relatively soft impact-resistant layer and the first adhesive layer, making the first transparent base film relatively stable and less prone to instability. Under repeated bending loading conditions with a fixed bending radius, the first transparent base film of the laminated structure experiences relatively small stress / tensile strain, making it less prone to cracking and bending failure. The laminated structure has an impact-resistant layer, providing good resistance to compression and impact, which is beneficial to improving reliability.

[0006] In one alternative implementation, the first transparent base film can be polyethylene terephthalate / polyester, transparent polyimide, ultrathin glass, glass fiber composite film, etc. These materials have good light transmittance and can serve as a carrier for setting the impact-resistant film.

[0007] In one alternative implementation, the impact-resistant layer can be a silicone layer, a non-Newtonian fluid layer, a polyurethane layer, a polyurethane-like glass layer, or an energy-absorbing material layer. These materials possess high elasticity, allowing for significant deformation under external force and restoring their original shape after the force is removed, thus withstanding impact to meet reliability requirements. The materials also have high light transmittance, enabling light to pass through.

[0008] In one alternative implementation, the thickness of the impact-resistant layer is greater than or equal to 10 micrometers and less than or equal to 50 micrometers. The relatively small thickness of the impact-resistant layer provides better impact resistance.

[0009] In one alternative implementation, the first adhesive layer can be an optical adhesive, which is used to bond transparent optical components. Optical adhesives are colorless, transparent, have high light transmittance, and good adhesive strength. This makes the laminated structure suitable for protective films, cover plates, and other layered structures that require light transmission.

[0010] In one alternative implementation, in a laminated structure where the support layer does not need to be transparent, the first adhesive layer can be an opaque colloid.

[0011] In one alternative implementation, a layered structure can be applied to a foldable screen. This layered structure can be applied to different layers of the foldable screen, giving the predetermined layers better resistance to compression and impact.

[0012] In one alternative implementation, the layered structure can be a protective film, a cover plate, or a support layer. Under repeated bending loading conditions with a fixed bending radius, the pre-defined layered structure experiences less stress / tensile strain and is less prone to cracking and bending failure, thus improving the structural reliability of the folding machine.

[0013] In one alternative implementation, the laminated structure further includes a first hardening layer disposed on the side of the first transparent base film facing away from the impact-resistant film. The first hardening layer, located on the surface of the first transparent base film, improves the reliability of the laminated structure and reduces damage from scratches, abrasions, and impacts during use. By integrally placing the hardened first hardening layer and the first transparent base film on the relatively soft impact-resistant layer and first adhesive layer, the first transparent base film with the first hardening layer is more stable and less prone to instability. Under repeated bending loading conditions with a fixed bending radius, the first transparent base film with the first hardening layer experiences less stress / tensile strain, making it less susceptible to cracking and bending failure.

[0014] In one alternative implementation, the first hardened layer may be referred to as a hard coating layer. The first hardened layer may be an acrylic coating, an epoxy resin coating, or the like.

[0015] In one alternative implementation, the thickness of the laminated structure is greater than or equal to 70 micrometers and less than or equal to 200 micrometers. The thin laminated structure offers good reliability and exhibits excellent bending and impact resistance.

[0016] In one alternative implementation, the laminated structure further includes a second transparent base film and a second adhesive layer, with the first hardening layer, first transparent base film, impact-resistant layer, first adhesive layer, second transparent base film, and second adhesive layer sequentially stacked. The laminated structure is a six-layer structure. The first transparent base film with the first hardening layer is placed on the impact-resistant film, which is relatively stable and not prone to instability, thus improving bending resistance and impact resistance.

[0017] In one alternative implementation, the laminated structure further includes a second adhesive layer, and the first hardening layer, the first transparent base film, the first adhesive layer, the impact-resistant layer, and the second adhesive layer are sequentially stacked. The laminated structure is a five-layer structure. The first transparent base film with the first hardening layer is placed on the impact-resistant film, which is relatively stable and not prone to instability, thus improving bending resistance and impact resistance.

[0018] In one alternative implementation, a first hardening layer, a first transparent base film, an impact-resistant layer, and a first adhesive layer are stacked sequentially. The stacked structure is a four-layer structure. The first transparent base film with the first hardening layer is placed on the impact-resistant film, which is relatively stable and not prone to instability, thus improving bending resistance and impact resistance.

[0019] In one alternative implementation, the laminated structure further includes a second hardening layer, a third adhesive layer, a fourth transparent base film, and a fourth adhesive layer; the second hardening layer, the first transparent base film, the first adhesive layer, the impact-resistant layer, the third adhesive layer, the fourth transparent base film, and the fourth adhesive layer are stacked sequentially. The first transparent base film with the second hardening layer is placed on the impact-resistant film, which is relatively stable and not prone to instability, thus improving bending resistance and impact resistance.

[0020] In one alternative implementation, the fourth transparent base film can be an ultra-thin glass layer, a transparent polyimide layer, a glass fiber composite film, or a polyester layer. These materials possess flexibility and transparency, meeting the screen bending requirements, contributing to the flatness of the display module, and resulting in shallow creases.

[0021] In one alternative implementation, the laminated structure further includes a second hardened layer, a third transparent base film, a third adhesive layer, and a fourth adhesive layer, which are sequentially stacked. The first transparent base film and the third transparent base film with the second hardened layer are disposed on the impact-resistant film, making them relatively stable and less prone to instability, which is beneficial for improving bending resistance and impact resistance.

[0022] In one alternative implementation, the laminated structure further includes a second hardening layer, a third transparent base film, a third adhesive layer, and a fourth adhesive layer, which are sequentially stacked. The second hardening layer, the third transparent base film, the third adhesive layer, the first transparent base film, the first adhesive layer, the impact-resistant layer, and the fourth adhesive layer are integrally disposed on the impact-resistant film, making it relatively stable and less prone to instability, which is beneficial for improving bending resistance and impact resistance.

[0023] In one alternative implementation, the laminated structure further includes a fourth adhesive layer, with the first transparent base film, the first adhesive layer, the impact-resistant layer, and the fourth adhesive layer stacked sequentially. This improves bending resistance and impact resistance.

[0024] In one alternative implementation, the laminated structure further includes a seventh adhesive layer and a support member, with the seventh adhesive layer, the first transparent base film, the impact-resistant layer, the first adhesive layer, and the support member stacked sequentially. This improves bending resistance and impact resistance.

[0025] In one alternative implementation, the laminated structure further includes a seventh adhesive layer, an eighth adhesive layer, and a support member, wherein the seventh adhesive layer, the impact-resistant layer, the first adhesive layer, the first transparent base film, the eighth adhesive layer, and the support member are stacked sequentially. This improves bending resistance and impact resistance.

[0026] In one alternative implementation, the laminated structure further includes a seventh adhesive layer, an eighth adhesive layer, and a support member, wherein the seventh adhesive layer, the first transparent base film, the first adhesive layer, the impact-resistant layer, the eighth adhesive layer, and the support member are stacked sequentially. This improves bending resistance and impact resistance.

[0027] In one alternative implementation, the laminated structure further includes a seventh adhesive layer, an eighth adhesive layer, and a support member, wherein the seventh adhesive layer, the first transparent base film, the eighth adhesive layer, the impact-resistant layer, the first adhesive layer, and the support member are stacked sequentially. This improves bending resistance and impact resistance.

[0028] Secondly, embodiments of this application provide an electronic device, including a display module and a protective film; the display module includes a cover plate, a display panel, and a support layer stacked sequentially. The protective film includes the aforementioned stacked structure; the protective film is disposed on the side of the cover plate opposite to the display panel.

[0029] The electronic device provided in this application embodiment has a cover plate that protects the display panel, reducing physical damage such as drops and scratches. The display panel emits light to display predetermined information and images. A support layer is located between the display panel and the mid-frame of the electronic device, and is connected to the first and second housings on the same side. The support layer improves the impact and drop resistance of the display module. A protective film is placed on the outermost side of the display module, protecting the main body of the display module. The protective film is in direct contact with the user during use and is replaceable. The display module with the protective film has high reliability.

[0030] In one alternative implementation, the electronic device includes a first housing, a second housing, a hinge mechanism, and a display module. The first and second housings may include a mid-frame. A battery, circuit board, or other components may be installed within the mid-frame. The first and second housings are connected by the hinge mechanism, allowing them to fold or unfold relative to each other, thus achieving opening and closing movements. The display module is located on the same side of the first and second housings.

[0031] In one alternative implementation, the cover plate includes a second hardened layer, a third transparent base film, a third adhesive layer, a fourth transparent base film, and a fourth adhesive layer stacked sequentially; the second hardened layer is connected to the protective film, and the fourth adhesive layer is connected to the display panel. The cover plate has a five-layer structure.

[0032] In one alternative implementation, the third and fourth transparent base films can be ultra-thin glass layers, transparent polyimide layers, glass fiber composite films, or polyester layers. They possess flexibility and transparency, meeting the requirements for screen bending, contributing to the flatness of the display module, and resulting in shallow creases.

[0033] In one alternative implementation, the cover plate includes a fourth transparent base film and a fourth adhesive layer stacked together. The fourth transparent base film is connected to a protective film, and the fourth adhesive layer is connected to a display panel. The cover plate has a two-layer structure.

[0034] In one alternative implementation, the display panel includes a display layer, a sixth adhesive layer, and a back film stacked sequentially. The display layer is connected to a cover plate, and the back film is connected to a support layer. The display panel has a three-layer structure. The back film protects the display panel and reduces the possibility of damage.

[0035] In one alternative implementation, the display panel includes a polarizer, a fifth adhesive layer, a display layer, a sixth adhesive layer, and a back film stacked sequentially. The polarizer is connected to a cover plate, and the back film is connected to a support layer. The display panel has a five-layer structure. The polarizer serves as a functional layer. The back film protects the display panel and reduces the possibility of damage.

[0036] In one alternative implementation, a touch layer can be set on the display layer, which serves as a functional layer to implement touch sensing functionality.

[0037] In one alternative implementation, the support layer includes a stacked seventh adhesive layer and a support member, with the support member and the display panel connected via the seventh adhesive layer. The support layer has a two-layer structure.

[0038] In one alternative implementation, the support layer includes a stacked seventh adhesive layer, a base film layer, an eighth adhesive layer, and a support member, with the display panel and the base film layer connected via the seventh adhesive layer. The support layer has a four-layer structure.

[0039] In one alternative implementation, the support component can be made of materials such as stainless steel, titanium alloy, or carbon fiber. These materials possess good tensile strength and impact resistance, making them suitable for applications subject to high pressure or impact.

[0040] Thirdly, embodiments of this application provide a display module, including a cover plate, a display panel, and a support layer stacked sequentially. The cover plate includes the aforementioned stacked structure, which includes a first transparent base film and an impact-resistant film stacked together; and / or, the support layer includes the aforementioned stacked structure, which includes a first transparent base film and an impact-resistant film stacked together.

[0041] This application provides a display module. Under repeated bending loading with a fixed bending radius, the cover plate (support layer) of the display module experiences relatively small stress / tensile strain, making it less prone to cracking and bending failure. An impact-resistant layer is provided within the cover plate (support layer) of the display module, providing good resistance to compression and impact, thus improving the overall structural reliability.

[0042] Fourthly, embodiments of this application provide an electronic device, including a housing and the aforementioned display module, wherein the display module is disposed on the housing.

[0043] The electronic device provided in this application embodiment has the above-mentioned display module. Under repeated bending loading conditions with a fixed bending radius, the stress / tensile strain of the cover plate (support layer) of the display module is small, and it is not easy to crack and fail due to bending. An impact-resistant layer is provided in the cover plate (support layer) of the display module, which has good resistance to compression and impact, which is beneficial to improving reliability.

[0044] In one alternative implementation, the electronic device further includes a protective film comprising the aforementioned laminated structure. The laminated structure comprises a first transparent base film and an impact-resistant film stacked together. This further enhances the overall structure's bending and impact resistance. Attached Figure Description

[0045] Figure 1A This is a schematic diagram of the structure of the protective film and display module in one possible embodiment; Figures 1B to 1F These are schematic diagrams of the protective film in various possible embodiments; Figure 2 This is a schematic diagram of the protective film and display module in another possible embodiment; Figure 3 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application when it is in a flattened state; Figure 4 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application when it is in a closed state; Figure 5 for Figure 3 Exploded three-dimensional view of electronic equipment; Figure 6 This is a schematic diagram of the structure of the protective film and display module provided in the embodiments of this application; Figures 7A to 7C These are schematic diagrams of the stacked structures provided in different embodiments of this application; Figures 8A to 8D These are schematic diagrams of the stacked structures provided in different embodiments of this application; Figure 9 A to Figure 9D These are schematic diagrams of the stacked structures provided in different embodiments of this application; Figure 10A , Figure 10B These are schematic diagrams of the cover plates provided in different embodiments of this application; Figure 11A , Figure 11B These are schematic diagrams of the display panels provided in different embodiments of this application; Figure 12A , Figure 12B These are schematic diagrams of the support layer provided in different embodiments of this application; Figures 13 to 16 These are schematic diagrams of the protective film and display module provided in different embodiments of this application.

[0046] Explanation of reference numerals in the attached figures: 1-Protective film; 1a-Curing layer; 1b-First transparent base film; 1c-First adhesive layer; 1d-Second transparent base film; 1e-Second adhesive layer; 1f-Impact layer; 2-Display module; 3-Cover plate; 3a-Film material; 3b-Adhesive layer; 4-Display panel; 4a-Polarizing film; 4b-Adhesive layer; 4c-Display layer; 4d-Back film; 5-Support layer; 5a-Adhesive layer; 5b-Film material; 5c-Support component; 10-Layered structure; 11-First hardened layer; 12-First transparent base film; 13-Impact film; 131-Impact layer; 132-First adhesive layer; 14-Second transparent base film; 15-Second adhesive layer; 20 - Protective film; 30 - Display module; 30a - Display module; 31-Cover plate; 311-Second hardened layer; 312-Third transparent base film; 313-Third adhesive layer; 314-Fourth transparent base film; 315-Fourth adhesive layer; 32-Display panel; 321-Polarizing film; 322-Fifth adhesive layer; 323-Display layer; 324-Sixth adhesive layer; 325-Back film; 33-Support layer; 33a-Bending area; 33b-Through hole; 331-Seventh adhesive layer; 332-Base film layer; 333-Eighth adhesive layer; 334-Support component.

[0047] 40 - First housing; 50 - Second housing; 60 - Rotating shaft mechanism; 100 - Electronic equipment. Detailed Implementation

[0048] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Although the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this implementation. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may arise based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0049] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0050] It should be understood that, in the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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 of this application.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0052] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0053] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0054] See Figure 1A This application discloses a possible embodiment of a protective film 1, which can be installed on a display module 2. The protective film 1 does not contain any impact-resistant material or impact-resistant layer. For example, see [reference needed]. Figure 1B The protective film 1 comprises a hardened layer 1a, a first transparent base film 1b, and a first adhesive layer 1c, stacked sequentially. Alternatively, see [link to relevant documentation]. Figure 1C The protective film 1 includes a hardened layer 1a, a first transparent base film 1b, a first adhesive layer 1c, a second transparent base film 1d, and a second adhesive layer 1e, which are stacked sequentially. The first adhesive layer 1c and the second adhesive layer 1e can be optical adhesives.

[0055] Combination Figure 1A The aforementioned protective film 1 lacks impact-resistant material, resulting in poor protection for the display module 2 and weakening its overall resistance to compression and impact. To improve the protection of the display panel 4 in the display module 2, the cover plate 3 and support layer 5 in the display module 2 could be thickened, increasing the number of material layers. However, this would hinder the thinning, weight reduction, and crease reduction of the display module 2 / the entire unit.

[0056] See Figure 1A , Figures 1D to 1F In another possible embodiment of this application, a protective film 1 is mounted on a display module 2. The protective film 1 contains an impact-resistant material or an impact-resistant layer 1f. The thickness t0 of the adhesive layer in the protective film 1 bonded to the impact-resistant layer 1f is greater than or equal to 25 micrometers. For example, see [reference needed]. Figure 1D The protective film 1 comprises a hardened layer 1a, a first transparent base film 1b, an impact-resistant layer 1f, and a first adhesive layer 1c, which are stacked sequentially. The thickness t0 of the first adhesive layer 1c is 35 micrometers. Alternatively, see [reference needed]. Figure 1EThe protective film 1 comprises, in sequence, a hardened layer 1a, a first transparent base film 1b, a first adhesive layer 1c, an impact-resistant layer 1f, and a second adhesive layer 1e, wherein the thickness t0 of the second adhesive layer 1e is 25 micrometers. Alternatively, see [reference needed]. Figure 1F The protective film 1 includes a hardened layer 1a, a first transparent base film 1b, an impact-resistant layer 1f, a first adhesive layer 1c, a second transparent base film 1d, and a second adhesive layer 1e, which are stacked in sequence. The thickness t0 of the first adhesive layer 1c is 50 micrometers.

[0057] Combination Figure 1A In the aforementioned protective film 1, the impact-resistant layer 1f is very soft and has a certain thickness. The first adhesive layer 1c (second adhesive layer 1e) connected to the impact-resistant layer 1f is also very soft and has a large thickness t0 (thickness t0 is greater than 25 micrometers). The first transparent base film 1b with the hardening layer 1a is relatively hard. By integrally placing the hard hardening layer 1a and the first transparent base film 1b on the very soft impact-resistant layer 1f and the first adhesive layer 1c (second adhesive layer 1e), the first transparent base film 1b with the hardening layer 1a is prone to instability. Under repeated bending loading conditions with a fixed bending radius, the first transparent base film 1b with the hardening layer 1a experiences excessive stress / tensile strain, easily developing cracks and failing due to bending.

[0058] See Figure 2 The display module 2 includes a cover plate 3, a display panel 4, and a support layer 5 stacked sequentially. The cover plate 3 includes multiple layers of staggered film material 3a and adhesive layer 3b. The display panel 4 includes a polarizer 4a, adhesive layer 4b, display layer 4c, and back film 4d stacked sequentially. The support layer 5 includes an adhesive layer 5a, film material 5b, and support member 5c stacked sequentially. The display module 2 can be configured with a structure of 12 to 14 layers. When the protective film 1 is installed on the display module 2, the total thickness of the protective film 1 and the display module 2 is relatively large.

[0059] See Figure 3 and Figure 4 This application provides an electronic device 100, which can be a foldable device and can have various folding forms, such as an inner folding device, an outer folding device, a triple folding device, etc.

[0060] The main screen of an inward-folding phone can fold inwards, and when closed, the main screen is located inside the body. Inward-folding phones can be dual-folding screen phones, such as large folding screen phones and small folding screen phones, or they can be foldable tablets, foldable screen computers, etc.

[0061] An outward-folding phone's screen can fold outwards, and when closed, the screen is located on the outside of the device. Outward-folding phones can be dual-folding screen phones or foldable tablets.

[0062] Triple-fold phones can be categorized into three-fold screen phones, and come in S-type and G-type models. The S-type triple-fold phone uses a combination of one outward fold and one inward fold, forming an S-shape when closed, with part of the screen located on the outside of the body and the other part inside. The G-type triple-fold phone uses a double inward fold design on both sides, forming a G-shape when closed, with the screen located inside the body.

[0063] See Figures 3 to 5 The electronic device 100 includes a first housing 40, a second housing 50, a hinge mechanism 60, and a display module 30. The first housing 40 and the second housing 50 may include a mid-frame. Components such as batteries and circuit boards can be installed within the mid-frame. The hinge mechanism 60 can be referred to as a hinge mechanism. The first housing 40 and the second housing 50 are connected via the hinge mechanism 60, allowing the first housing 40 and the second housing 50 to fold or unfold relative to each other, realizing the opening and closing movement of the first housing 40 and the second housing 50. The display module 30 can be referred to as a screen. The display module 30 is located on the same side of the first housing 40 and the second housing 50.

[0064] To facilitate the description of the orientation of the electronic device 100, the arrangement direction of the first housing 40 and the second housing 50 when the electronic device 100 is flat is defined as the X direction, the axial direction of the rotating shaft mechanism 60 is defined as the Y direction, and the thickness direction of the electronic device 100 when flattened / the thickness direction of the first housing 40 is defined as the Z direction.

[0065] Taking the electronic device 100 as an example of an inward folding mechanism, the inward folding mechanism has a flattened state and a closed state. The pivot mechanism 60 is a known inward folding pivot. During the opening and closing movements of the first housing 40 and the second housing 50, the display module 30 can follow the first housing 40, the second housing 50 and the pivot mechanism 60 to unfold and bend.

[0066] See Figure 3 When the inward folding mechanism is in the flattened state, the first housing 40 and the second housing 50 are arranged along the X direction, with the first housing 40 and the second housing 50 at approximately 180° apart, so that the display module 30 is flattened to provide a large display area.

[0067] See Figure 4 When the inner folding mechanism is in the closed state, the first housing 40 is folded relative to the second housing 50, and the first housing 40 and the second housing 50 are stacked, resulting in a compact overall structure. When the first housing 40 and the second housing 50 are closed, the area of ​​the display module 30 corresponding to the pivot mechanism 60 bends along with the first housing 40 and the second housing 50 and is located between the first housing 40 and the second housing 50.

[0068] In some embodiments, see Figure 5 , Figure 6The display module 30 includes a cover plate 31, a display panel 32, and a support layer 33 stacked sequentially. The cover plate 31 protects the display panel 32, reducing physical damage such as drops and scratches. The display panel 32 emits light to display predetermined information and images. The support layer 33 can be referred to as a bamboo book. The support layer 33 is located between the display panel 32 and the mid-frame of the electronic device 100, and is connected to the first housing 40 and the second housing 50 on the same side. The support layer 33 improves the impact resistance and drop resistance of the display module 30. The bending area 33a of the support layer 33 is provided corresponding to the pivot mechanism 60, and a through hole 33b is provided in the bending area 33a to facilitate bending.

[0069] In some embodiments, see Figure 5 , Figure 6 The electronic device 100 may include a protective film 20. The protective film 20 is disposed on the outermost side of the display module 30, that is, on the side of the cover plate 31 facing away from the display panel 32, serving to protect the main body of the display module 30. During user use, the protective film 20 is in direct contact with the user, and the protective film 20 is replaceable. The display module 30 with the protective film 20 installed has high reliability.

[0070] In some other embodiments, the protective film 20 may not be provided on the display module 30.

[0071] See Figures 7A to 7C This application provides a laminated structure 10, which includes a first transparent base film 12 and an impact-resistant film 13 stacked together. The impact-resistant film 13 includes an impact-resistant layer 131 and a first adhesive layer 132; wherein the first transparent base film 12, the impact-resistant layer 131, and the first adhesive layer 132 are stacked sequentially; or, the first transparent base film 12, the first adhesive layer 132, and the impact-resistant layer 131 are stacked sequentially. The thickness t1 of the first adhesive layer 132 is greater than or equal to 6 micrometers and less than or equal to 20 micrometers.

[0072] For example, the thickness t1 of the first adhesive layer 132 can be 6 micrometers, 7 micrometers, 8 micrometers, 9 micrometers, 10 micrometers, 11 micrometers, 12 micrometers, 13 micrometers, 14 micrometers, 15 micrometers, 16 micrometers, 17 micrometers, 18 micrometers, 19 micrometers, 20 micrometers, or any range between two of the above values, and the specific value can be set as needed.

[0073] The laminated structure 10 provided in this application embodiment includes a first transparent base film 12 and an impact-resistant film 13 stacked sequentially. An impact-resistant layer 131 and a first adhesive layer 132 in the impact-resistant film 13 are stacked and connected. The thickness t1 of the first adhesive layer 132 is limited to between 6 micrometers and 20 micrometers, making the thickness t1 of the first adhesive layer 132 connected to the impact-resistant layer 131 thin but not too soft. The first transparent base film 12 is placed on the relatively soft impact-resistant layer 131 and the first adhesive layer 132, making the first transparent base film 12 relatively stable and less prone to instability. Under repeated bending loading conditions with a fixed bending radius, the first transparent base film 12 experiences relatively small stress / tensile strain, making it less prone to cracking and bending failure. The laminated structure 10, with its impact-resistant layer 131, has good resistance to compression and impact, which is beneficial for improving reliability.

[0074] In some embodiments, see Figures 7A to 7C The first transparent base film 12 can be polyethylene terephthalate (PET), colorless polyimide (CPI), ultra-thin glass (UTG), glass fiber composite film, etc. These materials have good light transmittance and can be used as carriers for setting the impact-resistant film 13.

[0075] In some embodiments, see Figures 7A to 7C The impact-resistant layer 131 can be a silicone layer, a non-Newtonian fluid layer, a polyurethane layer, a polyurethane-like glass layer, or an energy-absorbing material layer. These materials have high elasticity, can undergo large deformation under external force, and can return to their original shape after the external force is removed, thus withstanding impact to meet reliability requirements. These materials have high light transmittance, allowing light to pass through. The impact-resistant layer 131 can be configured with one or more combinations as needed.

[0076] The silicone layer is made of silicone, which stretches and deforms under stress, absorbing energy. After the external force is removed, the silicone quickly returns to its original state, achieving an elastic effect.

[0077] The non-Newtonian fluid layer is made of non-Newtonian fluid materials. Non-Newtonian fluid materials have shear-thickening properties; they harden upon impact to absorb energy and return to a soft state after the external force is removed.

[0078] The polyurethane layer is made of polyurethane material, which has high elasticity, abrasion resistance, and adhesive properties. For example, thermoplastic polyurethane elastomer (TPU).

[0079] The polyurethane-based glass layer is made of polyurethane-based glass. Polyurethane-based glass is a polymer material that combines glassy properties with a polyurethane structure.

[0080] The energy-absorbing material layer is made of energy-absorbing materials that can absorb and dissipate impact energy. For example, energy-absorbing materials containing non-covalent dynamic bonds can be dynamic polymer thermoplastic elastomers or self-healing hydrogels.

[0081] In some embodiments, see Figures 7A to 7C The thickness of the impact-resistant layer 131 is greater than or equal to 10 micrometers and less than or equal to 50 micrometers. The relatively small thickness of the impact-resistant layer 131 provides good impact resistance.

[0082] For example, the thickness of the impact-resistant layer 131 can be 10 micrometers, 15 micrometers, 20 micrometers, 25 micrometers, 30 micrometers, 35 micrometers, 40 micrometers, 45 micrometers, 50 micrometers, or any range between two of the above values, and the specific value can be set as needed.

[0083] In some embodiments, see Figures 7A to 7C The first adhesive layer 132 can be optically clear adhesive (OCA), which is an adhesive used to bond transparent optical components. Optical adhesive is colorless, transparent, has high light transmittance, and good bonding strength. This makes the laminated structure 10 suitable for protective films, cover plates, and other layered structures that require light transmission.

[0084] Liquid adhesive (optical clear resin, OCR), also known as liquid optically clear adhesive (LOCA), belongs to the category of optical adhesives.

[0085] In other embodiments, when the laminated structure 10 is applied in a layered structure where the support layer does not need to be transparent, the first adhesive layer 132 can be an opaque colloid.

[0086] In some embodiments, see Figure 5 , Figure 6 The laminated structure can be applied to foldable screens. The laminated structure can be a protective film 20, a cover plate 31, or a support layer 33. The above-mentioned laminated structure can be applied to different layers of the foldable screen, so that the predetermined layer structure has better resistance to compression and impact. Under repeated bending loading conditions with a fixed bending radius, the stress / tensile strain of the predetermined layer structure is small, and it is not easy to crack and fail due to bending, thus improving the structural reliability of the folding machine.

[0087] In some embodiments, see Figures 7A to 7CThe laminated structure 10 also includes a first hardening layer 11, which is disposed on the side of the first transparent base film 12 facing away from the impact-resistant film 13. The first hardening layer 11, disposed on the surface of the first transparent base film 12, improves the reliability of the laminated structure 10 and reduces damage from scratches, wear, and impacts during use. Among the first hardening layer 11, the first transparent base film 12, the impact-resistant layer 131, and the first adhesive layer 132, the first hardening layer 11 has the highest hardness. The overall hardness of the first transparent base film 12 with the first hardening layer 11 is greater than that of the impact-resistant layer 131 and also greater than that of the first adhesive layer 132.

[0088] Compared to the impact-resistant layer 131 and the first adhesive layer 132, the first transparent base film 12 with the first hardening layer 11 has a higher overall hardness. By placing the hard first hardening layer 11 and the first transparent base film 12 on top of the relatively soft impact-resistant layer 131 and the first adhesive layer 132, the first transparent base film 12 with the first hardening layer 11 is more stable and less prone to instability. Under repeated bending loading conditions with a fixed bending radius, the first transparent base film 12 with the first hardening layer 11 experiences less stress / tensile strain in the laminated structure 10, making it less prone to cracking and bending failure.

[0089] In some embodiments, see Figures 7A to 7C The first hardened layer 11 can be referred to as a hard coating (HC). The first hardened layer 11 can be an acrylic coating, an epoxy resin coating, etc.

[0090] The first hardened layer 11 can be one or more of the following: anti-fingerprint film (AF film), anti-glare film (AG film), and anti-reflective film (AR film).

[0091] In some embodiments, see Figure 6 The thickness of the laminated structure 10 is greater than or equal to 70 micrometers and less than or equal to 200 micrometers. The laminated structure 10 has a small thickness, good reliability, and good bending resistance and impact resistance.

[0092] For example, the thickness of the stacked structure 10 can be 70 micrometers, 80 micrometers, 90 micrometers, 100 micrometers, 110 micrometers, 120 micrometers, 130 micrometers, 140 micrometers, 150 micrometers, 160 micrometers, 170 micrometers, 180 micrometers, 190 micrometers, 200 micrometers, or any range between two of the above values, and the specific value can be set as needed.

[0093] In some embodiments, see Figure 7AThe laminated structure 10 also includes a second transparent base film 14 and a second adhesive layer 15, wherein the first hardened layer 11, the first transparent base film 12, the impact-resistant layer 131, the first adhesive layer 132, the second transparent base film 14 and the second adhesive layer 15 are stacked sequentially.

[0094] The laminated structure 10 has six layers. The thickness t1 of the first adhesive layer 132, which connects to the impact-resistant layer 131, is made thin, limited to between 6 and 20 micrometers, ensuring the first adhesive layer 132 is not too soft. A first transparent base film 12 with a first hardening layer 11 is placed on the impact-resistant film 13, providing stability and reducing the likelihood of instability, thus improving bending resistance and impact resistance. The first adhesive layer 132 and the second adhesive layer 15 can be OCA to meet light transmittance requirements. The second transparent base film 14 can be a PET, CPI, UTG, or glass fiber composite film.

[0095] In some embodiments, see Figure 7B The laminated structure 10 also includes a second adhesive layer 15, and a first hardened layer 11, a first transparent base film 12, a first adhesive layer 132, an impact-resistant layer 131, and a second adhesive layer 15 are stacked in sequence.

[0096] The laminated structure 10 has five layers. The thickness t1 of the first adhesive layer 132, which connects to the impact-resistant layer 131, is made thin, limited to between 6 and 20 micrometers, ensuring the first adhesive layer 132 is not too soft. A first transparent base film 12 with a first hardening layer 11 is disposed on the impact-resistant film 13, providing stability and reducing the likelihood of instability, thus improving bending and impact resistance. The first adhesive layer 132 and the second adhesive layer 15 can be OCA to meet light transmission requirements.

[0097] In some embodiments, see Figure 7C The first hardened layer 11, the first transparent base film 12, the impact-resistant layer 131 and the first adhesive layer 132 are stacked in sequence.

[0098] The laminated structure 10 has four layers. The thickness t1 of the first adhesive layer 132, which connects to the impact-resistant layer 131, is made thin, limited to between 6 and 20 micrometers, ensuring the first adhesive layer 132 is not too soft. A first transparent base film 12 with a first hardening layer 11 is disposed on the impact-resistant film 13, providing stability and reducing the likelihood of instability, thus improving bending resistance and impact resistance. The first adhesive layer 132 and the second adhesive layer 15 can be OCA to meet light transmission requirements.

[0099] For example, the protective film 20 may include, Figure 7A , Figure 7B or Figure 7C The laminated structure 10 is shown. Applying the above-mentioned laminated structure 10 to the protective film 20 improves the bending resistance and impact resistance of the protective film 20.

[0100] For example, cover plate 31 may include, Figure 7A , Figure 7B or Figure 7C The laminated structure 10 is shown. Applying the above-mentioned laminated structure 10 to the cover plate 31 improves the bending resistance and impact resistance of the cover plate 31.

[0101] The following is about... Figure 1F The protective film 1 with a thick adhesive layer shown is as follows: Figure 7A The laminated structure 10 with a thin adhesive layer and the protective film 20 shown were subjected to simulation tests to test their bending resistance.

[0102] like Figure 1F In the protective film 1 shown, the thickness t0 of the first adhesive layer 1c connected to the impact-resistant layer 131 is greater than 20 micrometers and less than 35 micrometers, and the thickness t0 of the first adhesive layer 1c is relatively thick. For example... Figure 7A In the stacked structure 10 shown, the thickness t1 of the first adhesive layer 132 connected to the impact layer 131 is greater than or equal to 6 micrometers and less than or equal to 20 micrometers, and the thickness t1 of the first adhesive layer 132 is relatively thin.

[0103] like Figure 1F As shown, the protective film 1 with a thick adhesive layer and the first transparent base film 1b with a hardened layer 1a have a tensile strain of 1.5% to 3%, a maximum bending cycle of less than 300 times at -20°C, and a maximum bending cycle of less than 8000 times at room temperature with predetermined damage (such as impact damage). The protective film 1 will fail due to bending after exceeding the maximum bending cycle.

[0104] like Figure 7A As shown, the laminated structure 10 with a thin adhesive layer has a tensile strain of 0.5% to 1.5% for the first transparent base film 12 with a first hardening layer 11, a maximum bending cycle of 500 to 1500 times at a low temperature of -20°C, and a maximum bending cycle of more than 10,000 times at room temperature with predetermined damage (such as impact damage).

[0105] Compared to the protective film 1 with a thick adhesive layer, the laminated structure 10 with a thin adhesive layer has a smaller tensile strain and a larger maximum number of bending cycles at low temperatures and under predetermined damage conditions at room temperature. The thickness t1 of the first adhesive layer 132 connected to the impact-resistant layer 131 in the laminated structure 10 is set between 6 micrometers and 20 micrometers. Under repeated bending loads, the first transparent base film 12 with the first hardening layer 11 is less prone to cracking and bending failure, thus improving its bending resistance.

[0106] In some embodiments, see Figure 8AThe laminated structure 10 further includes a second hardening layer 311, a third adhesive layer 313, a fourth transparent base film 314, and a fourth adhesive layer 315; the second hardening layer 311, the first transparent base film 12, the first adhesive layer 132, the impact-resistant layer 131, the third adhesive layer 313, the fourth transparent base film 314, and the fourth adhesive layer 315 are stacked sequentially. The thickness t1 of the first adhesive layer 132 connected to the impact-resistant layer 131 is made thin, limited to between 6 micrometers and 20 micrometers, so that the first adhesive layer 132 is not very soft. The first transparent base film 12 with the second hardening layer 311 is disposed on the impact-resistant film 13, which is relatively stable and not easy to destabilize, which is beneficial to improving bending resistance and impact resistance.

[0107] The fourth transparent base film 314 can be an ultra-thin glass layer, a transparent polyimide layer, a glass fiber composite film, or a polyester layer. These materials have flexibility and transparency, which can meet the bending requirements of the screen, and are beneficial to the flatness of the display module 30, with shallow creases.

[0108] In some embodiments, see Figure 8B The laminated structure 10 also includes a second hardened layer 311, a third transparent base film 312, a third adhesive layer 313, and a fourth adhesive layer 315, which are sequentially stacked: the second hardened layer 311, the third transparent base film 312, the third adhesive layer 313, the impact-resistant layer 131, the first adhesive layer 132, the first transparent base film 12, and the fourth adhesive layer 315. The thickness t1 of the first adhesive layer 132, which is connected to the impact-resistant layer 131, is made thin, limited to between 6 micrometers and 20 micrometers, so that the first adhesive layer 132 is not too soft. The first transparent base film 12 and the third transparent base film 312 with the second hardened layer 311 are disposed on the impact-resistant film 13, making it relatively stable and less prone to instability, which is beneficial for improving bending resistance and impact resistance.

[0109] In some embodiments, see Figure 8C The laminated structure 10 also includes a second hardening layer 311, a third transparent base film 312, a third adhesive layer 313, and a fourth adhesive layer 315, which are sequentially stacked. The thickness t1 of the first adhesive layer 132, which is connected to the impact-resistant layer 131, is made thin, limited to between 6 and 20 micrometers, so that the first adhesive layer 132 is not too soft. The second hardening layer 311, the third transparent base film 312, and the first transparent base film 12 are integrally disposed on the impact-resistant film 13, making it relatively stable and less prone to instability, which is beneficial for improving bending resistance and impact resistance.

[0110] In some embodiments, see Figure 8DThe laminated structure 10 also includes a fourth adhesive layer 315, with the first transparent base film 12, the first adhesive layer 132, the impact-resistant layer 131, and the fourth adhesive layer 315 stacked sequentially. The thickness t1 of the first adhesive layer 132, which is connected to the impact-resistant layer 131, is made thin, limited to between 6 micrometers and 20 micrometers, ensuring the first adhesive layer 132 is not too soft. The first transparent base film 12 is disposed on the impact-resistant film 13, making it relatively stable and less prone to instability, which is beneficial for improving bending resistance and impact resistance.

[0111] For example, cover plate 31 may include, Figure 8A , Figure 8B , Figure 8C or Figure 8D The layered structure 10 is shown. The cover plate 31 protects the display panel 32 and reduces physical damage such as drops and scratches. An impact-resistant layer 131 is provided inside the cover plate 31, giving the cover plate 31 good resistance to compression and impact, thus improving the reliability of the cover plate 31.

[0112] For example, the protective film 20 may include, Figure 8A , Figure 8B , Figure 8C or Figure 8D The laminated structure 10 is shown. Applying the above-mentioned laminated structure 10 to the protective film 20 improves the bending resistance and impact resistance of the protective film 20.

[0113] In some embodiments, see Figure 9A The laminated structure 10 also includes a seventh adhesive layer 331 and a support member 334. The seventh adhesive layer 331, the first transparent base film 12, the impact-resistant layer 131, the first adhesive layer 132, and the support member 334 are stacked sequentially. The thickness t1 of the first adhesive layer 132, which is connected to the impact-resistant layer 131, is made thin, with the thickness limited to between 6 micrometers and 20 micrometers, so that the first adhesive layer 132 is not very soft. The first transparent base film 12 is disposed on the impact-resistant film 13, which is relatively stable and not easy to destabilize, which is beneficial to improving bending resistance and impact resistance.

[0114] In some embodiments, see Figure 9B The laminated structure 10 also includes a seventh adhesive layer 331, an eighth adhesive layer 333, and a support member 334. The seventh adhesive layer 331, the impact-resistant layer 131, the first adhesive layer 132, the first transparent base film 12, the eighth adhesive layer 333, and the support member 334 are stacked sequentially. The thickness t1 of the first adhesive layer 132, which is connected to the impact-resistant layer 131, is made thin, with the thickness limited to between 6 micrometers and 20 micrometers, so that the first adhesive layer 132 is not very soft. The first transparent base film 12 is disposed on the impact-resistant film 13, which is relatively stable and not easily unstable, which is beneficial to improving bending resistance and impact resistance.

[0115] In some embodiments, see Figure 9CThe laminated structure 10 also includes a seventh adhesive layer 331, an eighth adhesive layer 333, and a support member 334. The seventh adhesive layer 331, the first transparent base film 12, the first adhesive layer 132, the impact-resistant layer 131, the eighth adhesive layer 333, and the support member 334 are stacked sequentially. The thickness t1 of the first adhesive layer 132 connected to the impact-resistant layer 131 is made thin, with the thickness limited to between 6 micrometers and 20 micrometers, so that the first adhesive layer 132 is not very soft. The first transparent base film 12 is disposed on the impact-resistant film 13, which is relatively stable and not easy to destabilize, which is beneficial to improving bending resistance and impact resistance.

[0116] In some embodiments, see Figure 9D The laminated structure 10 also includes a seventh adhesive layer 331, an eighth adhesive layer 333, and a support member 334. The seventh adhesive layer 331, the first transparent base film 12, the eighth adhesive layer 333, the impact-resistant layer 131, the first adhesive layer 132, and the support member 334 are stacked sequentially. The thickness t1 of the first adhesive layer 132, which is connected to the impact-resistant layer 131, is made thin, with the thickness limited to between 6 micrometers and 20 micrometers, so that the first adhesive layer 132 is not very soft. The first transparent base film 12 is disposed on the impact-resistant film 13, which is relatively stable and not easy to destabilize, which is beneficial to improving bending resistance and impact resistance.

[0117] For example, the support layer 33 may include, Figure 9A , Figure 9B , Figure 9C or Figure 9D The layered structure 10 shown. The support layer 33 can improve the impact and drop resistance of the display module 30. The material of the support member 334 can be stainless steel, titanium alloy, carbon fiber, etc. An impact-resistant layer 131 is provided inside the support layer 33, which has good resistance to compression and impact, and improves the reliability of the support layer 33.

[0118] When setting a cover plate 31 without an impact-resistant membrane, there are several possible implementation methods. Two implementation methods are given below as examples. The cover plate 31 can adopt a structure of no more than 5 layers, which is beneficial for reducing the thickness and weight of the display module 30.

[0119] The first implementation method of the cover plate 31 without an impact-resistant membrane: see [link / reference] Figure 10A The cover plate 31 includes a second hardened layer 311, a third transparent base film 312, a third adhesive layer 313, a fourth transparent base film 314, and a fourth adhesive layer 315 stacked sequentially; combined with Figure 6 The second hardened layer 311 is connected to the protective film 20, and the fourth adhesive layer 315 is connected to the display panel 32.

[0120] The cover plate 31 has a five-layer structure. The cover plate 31 serves to protect the display panel 32 and reduce physical damage such as drops and scratches.

[0121] The third transparent base film 312 and the fourth transparent base film 314 can be an ultra-thin glass layer, a transparent polyimide layer, a glass fiber composite film, or a polyester layer. These materials have flexibility and transparency, which can meet the bending requirements of the screen, and are beneficial to the flatness of the display module 30, with shallow creases. The ultra-thin glass layer is made of ultra-thin glass (UTG). The transparent polyimide layer is made of transparent polyimide (CPI). The glass fiber composite film is made of glass fiber combined with an organic matrix (such as epoxy resin, phenolic resin, etc.) or an inorganic matrix. The polyester layer is made of polyester.

[0122] For example, see Figure 10A The cover plate 31 has a five-layer structure, with the second hardening layer 311, the third transparent base film 312, the third adhesive layer 313, the fourth transparent base film 314, and the fourth adhesive layer 315 stacked sequentially. The third transparent base film 312 is PET, the fourth transparent base film 314 is UTG, and the third adhesive layer 313 and the fourth adhesive layer 315 are OCA.

[0123] The second implementation method of the cover plate 31 without an impact-resistant membrane: see [link / reference] Figure 10B The cover plate 31 includes a fourth transparent base film 314 and a fourth adhesive layer 315 stacked together, in combination with Figure 6 The fourth transparent base film 314 is connected to the protective film 20, and the fourth adhesive layer 315 is connected to the display panel 32.

[0124] The cover plate 31 has a two-layer structure. The cover plate 31 serves to protect the display panel 32 and reduce physical damage such as drops and scratches.

[0125] The fourth transparent base film 314 can be an ultra-thin glass layer, a transparent polyimide layer, a glass fiber composite film, or a polyester layer. These materials have flexibility and transparency, which can meet the bending requirements of the screen, and are beneficial to the flatness of the display module 30, with shallow creases.

[0126] For example, see Figure 10B The cover plate 31 has a two-layer structure, with a fourth transparent base film 314 and a fourth adhesive layer 315 stacked together. The fourth transparent base film 314 is CPI and the fourth adhesive layer 315 is OCA.

[0127] There are several possible implementation methods when setting up the display panel 32. Two implementation methods are given as examples below.

[0128] The first implementation method of display panel 32: see Figure 11A The display panel 32 includes a display layer 323, a sixth adhesive layer 324, and a back film 325 stacked sequentially, combined with... Figure 6The display layer 323 is connected to the cover plate 31, and the back film 325 is connected to the support layer 33. The display panel 32 has a three-layer structure. The display panel 32 can emit light to display predetermined information and images.

[0129] The display layer 323 can be a flexible screen, such as an organic light-emitting diode (OLED) screen or an active matrix organic light-emitting diode (AMOLED) screen. The sixth adhesive layer 324 can be OCA. The back film 325 is used to protect the display panel 32 and reduce the possibility of damage to the display panel 32. The back film 325 can be PET.

[0130] A touch layer can be set on the display layer 323. The touch layer serves as a functional layer to realize touch sensing function.

[0131] The second implementation method of display panel 32: see Figure 11B The display panel 32 includes a polarizer 321, a fifth adhesive layer 322, a display layer 323, a sixth adhesive layer 324, and a back film 325 stacked sequentially, combined with... Figure 6 The polarizer 321 is connected to the cover plate 31, and the back film 325 is connected to the support layer 33. The display panel 32 has a five-layer structure. The display panel 32 can emit light to display predetermined information and images.

[0132] Polarizing film 321 serves as a functional layer. In organic light-emitting diodes (OLEDs), polarizing film 321 blocks ambient light interference and reduces the self-reflection problem of the display panel 32. Display layer 323 can be a flexible screen. The fifth adhesive layer 322 and the sixth adhesive layer 324 can be OCA. Back film 325 protects the display panel 32 and reduces the possibility of damage to the display panel 32. Back film 325 can be PET.

[0133] A touch layer can be set on the display layer 323. The touch layer serves as a functional layer to realize touch sensing function.

[0134] When setting a support layer 33 without the impact-resistant membrane 13, there are several optional implementation methods. Two implementation methods are given below as examples. The support layer 33 can adopt a structure of no more than 4 layers, which is beneficial for reducing the thickness and weight of the display module 30.

[0135] The first implementation method of the support layer 33 without an impact-resistant membrane: see [link / reference] Figure 12A The support layer 33 includes a stacked seventh adhesive layer 331 and a support member 334, combined with Figure 6 The support member 334 and the display panel 32 are connected by a seventh adhesive layer 331.

[0136] The support layer 33 has a two-layer structure, consisting of a seventh adhesive layer 331 and a support member 334 stacked together. The support layer 33 improves the impact and drop resistance of the display module 30. The support member 334 can be made of materials such as stainless steel (SUS), titanium alloy, or carbon fiber. These materials have good tensile strength and impact resistance, making them suitable for scenarios that withstand high pressure or impact.

[0137] For example, the support layer 33 has a two-layer structure, with the seventh adhesive layer 331 and the support member 334 stacked together. The seventh adhesive layer 331 can be OCA, and the support member 334 can be stainless steel.

[0138] The second implementation method for the support layer 33 without an impact-resistant membrane: See [link / reference] Figure 12B The support layer 33 includes a stacked seventh adhesive layer 331, a base film layer 332, an eighth adhesive layer 333, and a support member 334, which are combined with Figure 6 The display panel 32 and the base film layer 332 are connected by a seventh adhesive layer 331.

[0139] The support layer 33 has a four-layer structure, with the seventh adhesive layer 331, the base film layer 332, the eighth adhesive layer 333, and the support member 334 stacked sequentially. Compared to... Figure 12A The support layer 33 of the two-layer structure shown is as follows: Figure 12B The support layer 33 shown in this embodiment has a four-layer structure, which helps to improve the impact and drop resistance of the display module 30. The support member 334 can be made of materials such as stainless steel, titanium alloy, and carbon fiber.

[0140] For example, the support layer 33 has a four-layer structure, with the seventh adhesive layer 331, the base film layer 332, the eighth adhesive layer 333, and the support member 334 stacked sequentially. The seventh adhesive layer 331 can be OCA, the base film layer 332 can be polyimide, the eighth adhesive layer 333 can be OCA or pressure sensitive adhesive (PSA), and the support member 334 can be stainless steel.

[0141] Understandably, the above is as follows Figures 7A to 7C The protective film 20 shown can be implemented in various ways as needed. (The above is an example of...) Figures 8A to 8D , Figure 10A , Figure 10B The cover plate 31 shown has several implementation methods, such as Figure 11A , Figure 11B The display panel 32 shown has several implementation methods, such as Figures 9A to 9D , Figure 12A , Figure 12BThe support layer 33 shown can be implemented in various ways and can be arbitrarily selected and combined to form various display modules 30. The thickness of the display module 30 is greater than or equal to 350 micrometers and less than or equal to 550 micrometers. When the protective film 20 is installed on the display module 30, the total thickness of the protective film 20 and the display module 30 is less than 0.7 millimeters, resulting in a small thickness dimension and good structural reliability.

[0142] For example, see Figure 13 The display module 30 includes a cover plate 31, a display panel 32, and a support layer 33, totaling 10 layers, which facilitates the thinning and lightening of the display module 30 or the entire device. The cover plate 31 has a five-layer structure, comprising a second hardened layer 311, a third transparent base film 312, a third adhesive layer 313, a fourth transparent base film 314, and a fourth adhesive layer 315, stacked sequentially. The third transparent base film 312 can be PET, the fourth transparent base film 314 can be UTG, and the third and fourth adhesive layers 313 and 315 can be OCA. The display panel 32 has a three-layer structure, comprising a display layer 323, a sixth adhesive layer 324, and a back film 325, stacked sequentially. The support layer 33 has a two-layer structure, comprising a seventh adhesive layer 331 and a support member 334.

[0143] The protective film 20 can have a six-layer structure, with a first hardened layer 11, a first transparent base film 12, an impact-resistant layer 131, a first adhesive layer 132, a second transparent base film 14, and a second adhesive layer 15 stacked sequentially. The first transparent base film 12 and the second transparent base film 14 can be PET, and the first adhesive layer 132 and the second adhesive layer 15 can be OCA. The thickness t1 of the second adhesive layer 15 is 15 micrometers. When the above protective film 20 is installed on the display module 30, the display module 30 has good reliability performance (bending resistance, impact resistance, and extrusion resistance).

[0144] For example, see Figure 14 The display module 30 includes a cover plate 31, a display panel 32, and a support layer 33, totaling 12 layers, which facilitates the thinning and lightening of the display module 30 or the entire device. The cover plate 31 has a five-layer structure, with the second hardening layer 311, the third transparent base film 312, the third adhesive layer 313, the fourth transparent base film 314, and the fourth adhesive layer 315 stacked sequentially. The third transparent base film 312 can be PET, the fourth transparent base film 314 can be UTG, and the third adhesive layer 313 and the fourth adhesive layer 315 can be OCA. The display panel 32 has a three-layer structure, with the display layer 323, the sixth adhesive layer 324, and the back film 325 stacked sequentially. The support layer 33 has a four-layer structure, with the seventh adhesive layer 331, the base film layer 332, the eighth adhesive layer 333, and the support member 334 stacked sequentially. The seventh adhesive layer 331 can be OCA, the base film layer 332 can be polyimide, the eighth adhesive layer 333 can be OCA or PSA, and the support 334 can be stainless steel.

[0145] The protective film 20 can have a five-layer structure, comprising a first hardened layer 11, a first transparent base film 12, a first adhesive layer 132, an impact-resistant layer 131, and a second adhesive layer 15, stacked sequentially. The first transparent base film 12 can be PET, and the first adhesive layer 132 and the second adhesive layer 15 can be OCA. The thickness t1 of the second adhesive layer 15 is 15 micrometers. Compared to... Figure 13 The protective film 20 shown has a six-layer structure, such as Figure 14 The protective film 20 shown in this embodiment has a five-layer structure, which is beneficial for making the protective film 20 thinner and lighter. When the above-mentioned protective film 20 is installed on the display module 30, the display module 30 has better reliability performance (bending resistance, impact resistance, and extrusion resistance).

[0146] For example, see Figure 15 The display module 30 includes a cover plate 31, a display panel 32, and a support layer 33, totaling seven layers. Compared to... Figure 13 The display module 30 shown has 10 stacked layers, such as Figure 15 The embodiment shown here reduces the number of layers in the display module 30 by three, which helps to further reduce the thickness and weight of the display module 30 / the entire device. The cover plate 31 has a two-layer structure, consisting of a fourth transparent base film 314 and a fourth adhesive layer 315. Compared to... Figure 13 The five-layer cover plate 31 shown is as follows: Figure 15 The cover plate 31 in this embodiment has a two-layer structure, which is beneficial for making the cover plate 31 thinner and lighter. The display panel 32 has a three-layer structure, with the display layer 323, the sixth adhesive layer 324, and the back film 325 stacked sequentially. The support layer 33 has a two-layer structure, including a stacked seventh adhesive layer 331 and a support member 334. The seventh adhesive layer 331 can be OCA, and the support member 334 can be stainless steel.

[0147] The protective film 20 has a four-layer structure, comprising a first hardened layer 11, a first transparent base film 12, an impact-resistant layer 131, and a first adhesive layer 132, stacked sequentially. The first transparent base film 12 can be PET, and the first adhesive layer 132 can be OCA. The thickness t1 of the first adhesive layer 132 is 15 micrometers. Compared to... Figure 13 The protective film 20 shown has a six-layer structure, such as Figure 15 The protective film 20 shown in this embodiment has a four-layer structure, which is beneficial for making the protective film 20 thinner and lighter. When the above-mentioned protective film 20 is installed on the display module 30, the display module 30 has better reliability performance (bending resistance, impact resistance, and extrusion resistance).

[0148] For example, see Figure 16The display module 30 includes a cover plate 31, a display panel 32, and a support layer 33, totaling 10 layers, which facilitates the thinning and lightening of the display module 30 or the entire device. The cover plate 31 has a five-layer structure, comprising a second hardened layer 311, a third transparent base film 312, a third adhesive layer 313, a fourth transparent base film 314, and a fourth adhesive layer 315, stacked sequentially. The third transparent base film 312 can be PET, the fourth transparent base film 314 can be UTG, and the third and fourth adhesive layers 313 and 315 can be OCA. The display panel 32 has a three-layer structure, comprising a display layer 323, a sixth adhesive layer 324, and a back film 325, stacked sequentially. The support layer 33 has a two-layer structure, comprising a seventh adhesive layer 331 and a support member 334.

[0149] The protective film 20 can have a five-layer structure, comprising a first hardened layer 11, a first transparent base film 12, a first adhesive layer 132, an impact-resistant layer 131, and a second adhesive layer 15, stacked sequentially. The first transparent base film 12 is PET, and the first adhesive layer 132 and the second adhesive layer 15 can be OCA. The thickness t1 of the second adhesive layer 15 is 15 micrometers. Compared to... Figure 13 The protective film 20 shown has a six-layer structure, such as Figure 16 The protective film 20 shown in this embodiment has a five-layer structure, which is beneficial for making the protective film 20 thinner and lighter. When the above-mentioned protective film 20 is installed on the display module 30, the display module 30 has better reliability performance (bending resistance, impact resistance, and extrusion resistance).

[0150] When confirming the laminated structure 10 / electronic device 100 of this embodiment, cross-sectional analysis of the laminated structure 10 can be performed to confirm that the laminated structure 10 includes a first transparent base film 12 and an impact-resistant film 13 stacked sequentially. The impact-resistant film 13 includes an impact-resistant layer 131 and a first adhesive layer 132; wherein, the first transparent base film 12, the impact-resistant layer 131, and the first adhesive layer 132 are stacked sequentially; or, the first transparent base film 12, the first adhesive layer 132, and the impact-resistant layer 131 are stacked sequentially. The thickness t1 of the first adhesive layer 132 is greater than or equal to 6 micrometers and less than or equal to 20 micrometers.

[0151] When performing cross-sectional analysis on the laminated structure 10, the material, thickness, and number of layers of the laminated structure 10 can be detected. Film and adhesive materials at different locations are peeled off from the laminate of the display module 30 to analyze the physical properties and chemical composition of the materials.

[0152] For the analysis of physical properties of materials, atomic force microscopy (AFM), nanoindentation technology, and mechanical tensile and compression equipment can be used to determine the physical properties of materials at different locations, such as modulus.

[0153] Regarding the analysis of the chemical composition of materials, Fourier Transform Infrared Spectroscopy (FT-IR) can be used to characterize the functional groups of polymer materials at different positions, which can preliminarily determine the types of monomers used in the material; the characteristic photoelectron energies of X-ray photoelectron spectroscopy (XPS) can be used to determine the elemental composition of the material; by determining the chemical state information and quantitatively analyzing the elemental ratio through binding energy, the proportion of monomers used can be deduced; and time-of-flight secondary ion mass spectrometry (TOF-SIMS) can be used to identify different types of atoms and molecular structures.

[0154] See Figure 6 This application provides a display module 30a, comprising a cover plate 31, a display panel 32, and a support layer 33 stacked sequentially. In conjunction with... Figures 8A to 8D The cover plate 31 includes the aforementioned laminated structure 10, which includes a first transparent base film 12 and an impact-resistant film 13 stacked together; and / or, combined with Figures 9A to 9D The support layer 33 includes the aforementioned laminated structure 10, which includes a first transparent base film 12 and an impact-resistant film 13 stacked together. The impact-resistant film 13 includes an impact-resistant layer 131 and a first adhesive layer 132 stacked together; the thickness t1 of the first adhesive layer 132 is greater than or equal to 6 micrometers and less than or equal to 20 micrometers.

[0155] This application provides a display module 30a. Under repeated bending loading with a fixed bending radius, the cover plate 31 (support layer 33) of the display module 30a experiences relatively small stress / tensile strain, making it less prone to cracking and bending failure. An impact-resistant layer 131 is provided within the cover plate 31 (support layer 33) of the display module 30a, providing good resistance to compression and impact, thus improving the overall structural reliability.

[0156] Understandable, as mentioned above Figures 8A to 8D The cover plate 31 shown includes an embodiment of the laminated structure 10, such as... Figures 9A to 9D The support layer 33 shown includes an embodiment of the stacked structure 10, which can be applied in the display module 30a of this embodiment, and will not be described in detail here.

[0157] When setting up display panel 32, please refer to the previous instructions. Figure 11A , Figure 11B The implementation of the display panel 32 shown will not be described in detail here.

[0158] See Figures 3 to 6This application provides an electronic device 100, including a housing and the aforementioned display module 30a, wherein the display module 30a is disposed within the housing. (In conjunction with...) Figures 8A to 8D The cover plate 31 includes the aforementioned laminated structure 10, which includes a first transparent base film 12 and an impact-resistant film 13 stacked together; and / or, combined with Figures 9A to 9D The support layer 33 includes the above-mentioned stacked structure 10, which includes a first transparent base film 12 and an impact-resistant film 13 stacked together.

[0159] Electronic device 100 can be a foldable device, and can have various folding forms, such as an inward folding device, an outward folding device, a triple folding device, etc. The housing can include the first housing 40 and the second housing 50 mentioned above.

[0160] The electronic device 100 provided in this application embodiment has the above-mentioned display module 30a. Under repeated bending loading conditions with a fixed bending radius, the stress / tensile strain of the cover plate 31 (support layer 33) of the display module 30a is small, and it is not easy to crack and fail due to bending. An impact-resistant layer 131 is provided in the cover plate 31 (support layer 33) of the display module 30a, which has good resistance to compression and impact, and is conducive to improving reliability.

[0161] In some embodiments, based on the aforementioned laminated structure 10 used in the cover plate 31 and / or support layer 33, the electronic device 100 further includes a protective film 20, which also includes the aforementioned laminated structure 10. The laminated structure 10 includes a first transparent base film 12 and an impact-resistant film 13 stacked together. The impact-resistant film 13 includes an impact-resistant layer 131 and a first adhesive layer 132 stacked together; the thickness t1 of the first adhesive layer 132 is greater than or equal to 6 micrometers and less than or equal to 20 micrometers. This further improves the bending resistance and impact resistance of the overall structure.

[0162] When confirming the display module 30a / electronic device 100 of this embodiment, a slice analysis of the display module 30a can be performed to confirm that the display module 30a includes a cover plate 31, a display panel 32, and a support layer 33 stacked sequentially. The cover plate 31 includes a first transparent base film 12 and an impact-resistant film 13 stacked together, and / or, the support layer 33 includes a first transparent base film 12 and an impact-resistant film 13 stacked together. The impact-resistant film 13 includes an impact-resistant layer 131 and a first adhesive layer 132 stacked together; the thickness t1 of the first adhesive layer 132 is greater than or equal to 6 micrometers and less than or equal to 20 micrometers.

[0163] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A layered structure, characterized in that, The laminated structure (10) includes a first transparent base film (12) and an impact-resistant film (13) stacked together; The impact-resistant membrane (13) includes an impact-resistant layer (131) and a first adhesive layer (132); The first transparent base film (12), the impact-resistant layer (131), and the first adhesive layer (132) are stacked sequentially; or, the first transparent base film (12), the first adhesive layer (132), and the impact-resistant layer (131) are stacked sequentially. The thickness of the first adhesive layer (132) is greater than or equal to 6 micrometers and less than or equal to 20 micrometers.

2. The stacked structure according to claim 1, characterized in that, The impact-resistant layer (131) is a silicone layer, a non-Newtonian fluid layer, a polyurethane layer, a polyurethane-like glass layer, a dynamic polymer thermoplastic elastomer, or a self-healing hydrogel.

3. The stacked structure according to claim 1, characterized in that, The thickness of the impact-resistant layer (131) is greater than or equal to 10 micrometers and less than or equal to 50 micrometers.

4. The stacked structure according to claim 1, characterized in that, The first adhesive layer (132) is an optical adhesive.

5. The laminated structure according to any one of claims 1 to 4, characterized in that, The laminated structure (10) further includes a first hardening layer (11), which is disposed on the side of the first transparent base film (12) facing away from the impact-resistant film (13).

6. The stacked structure according to claim 5, characterized in that, The stacked structure (10) further includes a second transparent base film (14) and a second adhesive layer (15), wherein the first hardened layer (11), the first transparent base film (12), the impact-resistant layer (131), the first adhesive layer (132), the second transparent base film (14) and the second adhesive layer (15) are stacked sequentially; Alternatively, the laminated structure (10) may further include a second adhesive layer (15), wherein the first hardened layer (11), the first transparent base film (12), the first adhesive layer (132), the impact-resistant layer (131) and the second adhesive layer (15) are stacked sequentially; Alternatively, the first hardened layer (11), the first transparent base film (12), the impact-resistant layer (131), and the first adhesive layer (132) are stacked sequentially.

7. The laminated structure according to any one of claims 1 to 4, characterized in that, The thickness of the stacked structure (10) is greater than or equal to 70 micrometers and less than or equal to 200 micrometers.

8. The laminated structure according to any one of claims 1 to 4, characterized in that, The stacked structure (10) further includes a second hardening layer (311), a third adhesive layer (313), a fourth transparent base film (314), and a fourth adhesive layer (315), wherein the second hardening layer (311), the first transparent base film (12), the first adhesive layer (132), the impact-resistant layer (131), the third adhesive layer (313), the fourth transparent base film (314), and the fourth adhesive layer (315) are stacked sequentially; Alternatively, the laminated structure (10) may further include a second hardening layer (311), a third transparent base film (312), a third adhesive layer (313), and a fourth adhesive layer (315), wherein the second hardening layer (311), the third transparent base film (312), the third adhesive layer (313), the impact-resistant layer (131), the first adhesive layer (132), the first transparent base film (12), and the fourth adhesive layer (315) are stacked sequentially; Alternatively, the laminated structure (10) may further include a second hardening layer (311), a third transparent base film (312), a third adhesive layer (313), and a fourth adhesive layer (315), wherein the second hardening layer (311), the third transparent base film (312), the third adhesive layer (313), the first transparent base film (12), the first adhesive layer (132), the impact-resistant layer (131), and the fourth adhesive layer (315) are stacked sequentially; Alternatively, the stacked structure (10) may further include a fourth adhesive layer (315) stacked in sequence, wherein the first transparent base film (12), the first adhesive layer (132), the impact-resistant layer (131) and the fourth adhesive layer (315) are stacked in sequence.

9. The laminated structure according to any one of claims 1 to 4, characterized in that, The stacked structure (10) further includes a seventh adhesive layer (331) and a support member (334); the seventh adhesive layer (331), the first transparent base film (12), the impact-resistant layer (131), the first adhesive layer (132), and the support member (334) are stacked sequentially; Alternatively, the laminated structure (10) may further include a seventh adhesive layer (331), an eighth adhesive layer (333), and a support member (334), wherein the seventh adhesive layer (331), the impact-resistant layer (131), the first adhesive layer (132), the first transparent base film (12), the eighth adhesive layer (333), and the support member (334) are stacked sequentially; Alternatively, the laminated structure (10) may further include a seventh adhesive layer (331), an eighth adhesive layer (333), and a support member (334), wherein the seventh adhesive layer (331), the first transparent base film (12), the first adhesive layer (132), the impact-resistant layer (131), the eighth adhesive layer (333), and the support member (334) are stacked sequentially; Alternatively, the stacked structure (10) may further include a seventh adhesive layer (331), an eighth adhesive layer (333), and a support member (334), wherein the seventh adhesive layer (331), the first transparent base film (12), the eighth adhesive layer (333), the impact-resistant layer (131), the first adhesive layer (132), and the support member (334) are stacked in sequence.

10. The laminated structure according to any one of claims 1 to 4, characterized in that, The laminated structure (10) is a protective film (20), a cover plate (31), or a support layer (33).

11. The laminated structure according to any one of claims 1 to 4, characterized in that, The stacked structure (10) is applied to a foldable screen.

12. An electronic device, characterized in that, Includes a display module (30) and a protective film (20); The display module (30) includes a cover plate (31), a display panel (32), and a support layer (33) stacked in sequence; The protective film (20) includes a laminated structure (10) as described in any one of claims 1-11; the protective film (20) is disposed on the side of the cover plate (31) facing away from the display panel (32).

13. The electronic device according to claim 12, characterized in that, The display panel (32) includes a display layer (323), a sixth adhesive layer (324), and a back film (325) stacked in sequence. The display layer (323) is connected to the cover plate (31), and the back film (325) is connected to the support layer (33). Alternatively, the display panel (32) may include a polarizer (321), a fifth adhesive layer (322), a display layer (323), a sixth adhesive layer (324), and a back film (325) stacked in sequence, wherein the polarizer (321) is connected to the cover plate (31), and the back film (325) is connected to the support layer (33).

14. The electronic device according to claim 12, characterized in that, The cover plate (31) includes a second hardened layer (311), a third transparent base film (312), a third adhesive layer (313), a fourth transparent base film (314), and a fourth adhesive layer (315) stacked in sequence; the second hardened layer (311) is connected to the protective film (20), and the fourth adhesive layer (315) is connected to the display panel (32); Alternatively, the cover plate (31) may include a fourth transparent base film (314) and a fourth adhesive layer (315) stacked together, wherein the fourth transparent base film (314) is connected to the protective film (20) and the fourth adhesive layer (315) is connected to the display panel (32).

15. The electronic device according to claim 14, characterized in that, The fourth transparent base film (314) is an ultra-thin glass layer, a transparent polyimide layer, a glass fiber composite film, or a polyester layer.

16. A display module, characterized in that, It includes a cover plate (31), a display panel (32) and a support layer (33) stacked in sequence; The cover plate (31) includes a laminated structure (10) as described in any one of claims 1-11; And / or, the support layer (33) includes the stacked structure (10) as claimed in any one of claims 1-11.

17. An electronic device, characterized in that, It includes a housing and a display module (30a) as described in claim 16, wherein the display module (30a) is disposed in the housing.

18. The electronic device according to claim 17, characterized in that, The electronic device (100) further includes a protective film (20), the protective film (20) comprising a laminated structure (10) as described in any one of claims 1-11.

Images