Display module and foldable electronic device

Abstract

The application discloses a display module and a foldable electronic device. The display module is used for the foldable electronic device and comprises a flexible display screen. The flexible display screen comprises a support layer, a first protective layer, a display layer and a second protective layer which are sequentially stacked. The flexible display screen displays through the display layer, and the second protective layer is located on the display side of the flexible display screen. The first protective layer is an ultrathin flexible glass layer and is arranged along the circumferential side of the flexible display screen. The edge of the first protective layer is inwardly recessed from the edge of the display layer. A third protective layer is wrapped around at least part of the circumferential side of the flexible display screen, and the third protective layer at least wraps around the edge of the first protective layer and the edge of the display layer.

Description

Technical Field

[0001] This application belongs to the field of electronic device technology, specifically relating to a display module and a foldable electronic device. Background Technology

[0002] In related technologies, such as Figure 1 As shown, the display module includes a support layer 10', a first protective layer 11', a display layer 12', and a second protective layer 13' stacked in sequence. After the display module is bent multiple times, the first protective layer 11' is prone to irreversible plastic deformation, which causes creases in the display module and affects its performance. Utility Model Content

[0003] This application aims to provide a display module and a foldable electronic device, at least to solve the problem that display modules are prone to creases.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application propose a display module for a foldable electronic device. The display module includes: a flexible display screen, which includes a support layer, a first protective layer, a display layer, and a second protective layer stacked sequentially. The flexible display screen displays information through the display layer. The second protective layer is located on the display side of the flexible display screen. The first protective layer is an ultra-thin flexible glass layer, and its edge is recessed within the edge of the display layer along the periphery of the flexible display screen. A third protective layer is wrapped around at least a portion of the periphery of the flexible display screen, and the third protective layer wraps around at least the edge of the first protective layer and the edge of the display layer.

[0005] Secondly, embodiments of this application provide a foldable electronic device, including: a display module as described in any of the first aspects.

[0006] In the embodiments of this application, the display module includes a flexible display screen and a third protective layer. The flexible display screen includes a support layer, a first protective layer, a display layer, and a second protective layer stacked sequentially. The support layer provides support and protection for the first protective layer, the display layer, and the second protective layer. The first protective layer is located at the bottom of the display layer to prevent water and oxygen from entering the display side and to prevent the display layer from being squeezed or damaged by impact. The second protective layer is located at the top of the display layer to prevent the display layer from being squeezed or scratched by other objects. The first protective layer is an ultra-thin flexible glass layer. The ultra-thin flexible glass layer does not undergo plastic deformation and has good bending resistance, which can reduce creases in the flexible display screen. At the same time, the ultra-thin flexible glass layer has high strength and can protect the display layer from damage in the event of external impact or drop of foldable electronic devices, thereby improving the overall strength and performance of the flexible display screen. The edge of the first protective layer is recessed within the edge of the display layer to prevent the edge of the first protective layer from being cut when cutting the flexible display screen, thereby preventing the disappearance of the reinforcing layer at the edge of the first protective layer, ensuring the overall strength of the first protective layer, and thus ensuring the protective effect of the first protective layer on the display layer. The third protective layer covers at least the edges of the first protective layer and the display layer. On the one hand, the third protective layer covers the edges of the first protective layer, allowing it to fill the space where the first protective layer is recessed within the display layer, thus preventing the edges of the display layer from protruding from the first protective layer and becoming easily damaged. On the other hand, the third protective layer covers the edges of the display layer, at least protecting the edges of the display layer and preventing damage to the display layer. It also reduces the width of the black border.

[0007] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0008] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 A schematic diagram of the structure of a display module in the related technology is shown; Figure 2 One of the structural schematic diagrams of a display module according to an embodiment of this application is shown; Figure 3 A second schematic diagram of the structure of a display module according to an embodiment of this application is shown; Figure 4 The third schematic diagram shows the structure of a display module according to an embodiment of this application; Figure 5 The fourth schematic diagram shows the structure of a display module according to an embodiment of this application; Figure 6The fifth schematic diagram shows the structure of a display module according to an embodiment of this application; Figure 7 A comparison diagram of a display module according to an embodiment of this application and a display module in the related art is shown.

[0009] Figure label: 10' Support layer, 11' First protective layer, 12' Display layer, 13' Second protective layer, 1 Flexible display screen, 10 Support layer, 11 First protective layer, 12 Display layer, 13 Second protective layer, 14 Hardening layer, 15 Adhesive layer, 2 Third protective layer, 20 Waterproof adhesive layer, 22 Reinforcing adhesive layer, 24 Elastic adhesive layer. Detailed Implementation

[0010] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0011] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0012] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "circumferential", 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.

[0013] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0014] The following is combined with Figures 2-7 This application describes a display module and a foldable electronic device according to embodiments thereof.

[0015] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a display module according to some embodiments of this application is used in a foldable electronic device. The display module includes: a flexible display screen 1, which includes a support layer 10, a first protective layer 11, a display layer 12, and a second protective layer 13 stacked sequentially. The flexible display screen 1 displays through the display layer 12. The second protective layer 13 is located on the display side of the flexible display screen 1. The first protective layer 11 is an ultra-thin flexible glass layer. Along the periphery of the flexible display screen 1, the edge of the first protective layer 11 is recessed within the edge of the display layer 12. A third protective layer 2 is wrapped around at least a portion of the periphery of the flexible display screen 1, and the third protective layer 2 wraps around at least the edge of the first protective layer 11 and the edge of the display layer 12.

[0016] In the embodiments of this application, the display module includes a flexible display screen 1. The flexible display screen 1 includes a support layer 10, a first protective layer 11, a display layer 12, and a second protective layer 13 stacked sequentially. The support layer 10 provides support and protection for the first protective layer 11, the display layer 12, and the second protective layer 13. The first protective layer 11 is located at the bottom of the display layer 12 and is used to prevent water and oxygen from entering the display side and to prevent the display layer 12 from being squeezed or impacted and failing. The second protective layer 13 is located at the top of the display layer 12 and is used to prevent the display layer 12 from being squeezed or scratched by other objects. The first protective layer 11 is an ultra-thin flexible glass layer. The ultra-thin flexible glass layer does not undergo plastic deformation and has good bending resistance, which can reduce creases in the flexible display screen 1. At the same time, the ultra-thin flexible glass layer has high strength and can protect the display layer 12 from damage in the event of external impact or drop of foldable electronic devices, thereby improving the overall strength and performance of the flexible display screen 1.

[0017] The edge of the first protective layer 11 is recessed within the edge of the display layer 12 to prevent the edge of the first protective layer 11 from being cut during the cutting of the flexible display screen 1, thereby preventing the disappearance of the reinforcing layer at the edge of the first protective layer 11, ensuring the overall strength of the first protective layer 11, and thus ensuring the protective effect of the first protective layer 11 on the display layer 12. The display module also includes a third protective layer 2, which wraps around at least part of the periphery of the flexible display screen 1 to protect the edges of the multi-layer structure in the flexible display screen 1 and improve the overall strength of the flexible display screen 1. The third protective layer 2 wraps around at least the edges of the first protective layer 11 and the display layer 12: on the one hand, the third protective layer 2 wraps around the edge of the first protective layer 11 so that the third protective layer 2 can fill the space where the first protective layer 11 is recessed within the display layer 12, preventing the edge of the display layer 12 from protruding from the first protective layer 11 and being easily damaged; on the other hand, the third protective layer 2 wraps around the edge of the display layer 12, at least to protect the edge of the display layer 12, preventing the display layer 12 from being damaged, and also reducing the width of the black border.

[0018] It is understandable that the flexible display screen 1 has a multi-layer structure. After the support layer 10, the first protective layer 11, the display layer 12, the second protective layer 13 and other layers are stacked, they can be cut as a whole. Therefore, by shrinking the edge of the first protective layer 11 inward to the edge of the display layer 12, the edge of the first protective layer 11 can be prevented from being cut.

[0019] In addition, such as Figure 7 As shown, in general, in order to protect other layered structures below the second protective layer 13' through the second protective layer 13', the edge of the second protective layer 13' is set to protrude beyond the edge of the display layer 12', that is, the edge of the display layer 12' is recessed within the edge of the second protective layer 13'. Therefore, the width of the black border (e.g., non-display area) of the foldable electronic device frame is affected by the positional relationship between the second protective layer 13' and the display layer 12'. And as... Figure 6 and Figure 7 As shown in the embodiment proposed in this application, a third protective layer 2 is provided at the edge of the display layer 12, which realizes the protection of the display layer 12. Therefore, the flexible display screen 1 can be cut as a whole during cutting, without the need for the edge of the second protective layer 13 to protrude from the structure below the second protective layer 13 to achieve the protection of the structure below the second protective layer 13. That is, after the third protective layer 2 is provided, compared with the absence of the third protective layer 2, part or all of the part of the second protective layer 13 protruding from the structure below can be cut off, thereby reducing the width of the black border.

[0020] Optionally, under normal circumstances, the second protective layer 13 will extend outward by at least 0.3mm beyond the edge of the display layer 12 to protect the structure below the second protective layer 13. Even after achieving flush, one-piece cutting using laser, the second protective layer 13 will still extend outward by at least 0.3mm beyond the display layer 12. By setting the third protective layer 2, the width of the black border can be reduced by at least 0.3mm.

[0021] Optionally, the flexible display screen 1 includes four sides, and the third protective layer 2 wraps around three sides of the flexible display screen 1 along its circumference to facilitate the installation of the flexible circuit board and chip under the display module when the display module is used in a foldable electronic device.

[0022] Of course, the third protective layer 2 can also be wrapped around the four sides of the flexible display screen 1.

[0023] Optionally, the distance between the edge of the first protective layer 11 and the edge of the flexible display screen 1 is greater than or equal to 0.2 mm and less than or equal to 1 mm.

[0024] In this embodiment, if the distance between the edge of the first protective layer 11 and the edge of the display layer 12 is too small, it will increase the risk that the edge of the first protective layer 11 and the display layer 12 will be cut together. If the distance between the edge of the first protective layer 11 and the edge of the display layer 12 is too large, it will reduce the protective effect of the first protective layer 11 on the display layer 12. Therefore, setting the distance between the edge of the first protective layer 11 and the edge of the flexible display screen 1 to be greater than or equal to 0.2 mm and less than or equal to 1 mm can both prevent the edge of the first protective layer 11 from being cut and ensure the protective effect of the first protective layer 11 on the display layer 12.

[0025] Optionally, the distance between the edge of the first protective layer 11 and the edge of the flexible display screen 1 is any value among 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, and 1mm, or any value between any two of these values.

[0026] According to some embodiments of this application, optionally, the thickness of the first protective layer 11 is greater than or equal to 30 μm (micrometers) and less than or equal to 60 μm.

[0027] In this embodiment, the thickness of the first protective layer 11 is set to be greater than or equal to 30 μm and less than or equal to 60 μm, so that the first protective layer 11 has a good bending effect to meet the folding requirements and facilitate the ultra-thin design of the display module.

[0028] Optionally, the thickness of the first protective layer 11 is any value among 30μm, 40μm, 50μm, and 60μm, or any value between two of these values.

[0029] like Figures 2 to 5 As shown, according to some embodiments of this application, optionally, the sidewalls of the flexible display screen 1 are flush with the third protective layer 2 along the stacking direction of the flexible display screen 1.

[0030] In this embodiment, the sidewall of the flexible display screen 1 is flush with the third protective layer 2, which eliminates stress concentration points at the edge and reduces the risk of cracks caused by uneven edges when the flexible display screen 1 is bent; at the same time, it also enhances the structural integrity and mechanical strength of the edge of the flexible display screen 1, which is conducive to improving assembly accuracy and reliability, and makes the device frame design more compact.

[0031] According to some embodiments of this application, optionally, such as Figure 5 As shown, along the stacking direction of the flexible display screen 1, the third protective layer 2 extends from the first protective layer 11 to the second protective layer 13 and wraps around the edge of the second protective layer 13; or as shown... Figures 2 to 4 As shown, the third protective layer 2 is located between the side of the second protective layer 13 facing the first protective layer 11 and the side of the first protective layer 11 away from the second protective layer 13.

[0032] In this embodiment, the third protective layer 2 can extend from the first protective layer 11 to the second protective layer 13 and wrap around the edge of the second protective layer 13, so that the third protective layer 2 can cover the surface structure of the flexible display screen 1, achieving integrated protection from the surface to the bottom layer. Optionally, the third protective layer 2 can also be located between the side of the second protective layer 13 facing the first protective layer 11 and the side of the first protective layer 11 away from the second protective layer 13, that is, the third protective layer 2 may not cover the edge of the second protective layer 13, so as to reduce the overall width occupied by the flexible display screen 1.

[0033] like Figure 2 As shown, according to some embodiments of this application, the third protective layer 2 may optionally include a waterproof adhesive layer 20.

[0034] In this embodiment, the third protective layer 2 includes a waterproof adhesive layer 20. The waterproof adhesive layer 20 can effectively block external environmental media such as water and oxygen from intruding from the side wall of the flexible display screen 1, preventing the internal display layer 12, the first protective layer 11, etc. from failing due to corrosion or short circuit. At the same time, after curing, the waterproof adhesive layer 20 can maintain its flexibility to adapt to the bending movement of the display screen, and can also enhance the interlayer bonding force by filling the edge gaps, reducing the risk of delamination during bending. Thus, while improving the bending reliability of the flexible display screen 1, it also takes into account the overall thin and light design.

[0035] like Figure 3As shown, according to some embodiments of this application, optionally, the third protective layer 2 further includes a reinforcing adhesive layer 22, the outer side of the waterproof adhesive layer 20 is provided with the reinforcing adhesive layer 22, and the modulus of the reinforcing adhesive layer 22 is greater than the modulus of the waterproof adhesive layer 20.

[0036] In this embodiment, the third protective layer 2 further includes a reinforcing adhesive layer 22, and the reinforcing adhesive layer 22 is disposed on the outer side of the waterproof adhesive layer 20, thereby forming a composite protective structure. The reinforcing adhesive layer 22 has a higher modulus than the waterproof adhesive layer 20. The higher modulus of the reinforcing adhesive layer 22 provides support for the relatively soft waterproof adhesive layer 20, effectively suppressing excessive deformation of the waterproof adhesive layer 20 when bent or under pressure, and improving the overall impact resistance of the edges.

[0037] According to some embodiments of this application, optionally, the edge of the display layer 12 is provided with a reinforcing adhesive layer 22, and the edge of the first protective layer 11 is provided with a waterproof adhesive layer 20 and a reinforcing adhesive layer 22; or the edge of the display layer 12 is provided with a waterproof adhesive layer 20 and a reinforcing adhesive layer 22.

[0038] In this embodiment, when the third protective layer 2 includes a waterproof adhesive layer 20 and a reinforcing adhesive layer 22, the reinforcing adhesive layer 22 is provided at the edge of the display layer 12, and the waterproof adhesive layer 20 and the reinforcing adhesive layer 22 are provided at the edge of the first protective layer 11. That is, only the reinforcing adhesive layer 22 is provided at the edge of a portion of the layered structure of the flexible display screen 1, while the waterproof adhesive layer 20 and the reinforcing adhesive layer 22 are provided at the edge of another portion of the layered structure, thereby reducing the impact of the third protective layer 2 on the overall width or length of the flexible display screen 1. Optionally, the edge of the display layer 12 is provided with a waterproof adhesive layer 20 and a reinforcing adhesive layer 22, meaning that the waterproof adhesive layer 20 and the reinforcing adhesive layer 22 can be stacked at each layered structure, so that the edge of any layered structure is provided with a waterproof adhesive layer 20 and a reinforcing adhesive layer 22, thereby improving the protective performance through the combined action of the waterproof adhesive layer 20 and the reinforcing adhesive layer 22.

[0039] like Figure 4 and Figure 5 As shown, according to some embodiments of this application, optionally, the third protective layer 2 further includes an elastic adhesive layer 24, the outer side of the waterproof adhesive layer 20 is provided with an elastic adhesive layer 24, and the outer side of the elastic adhesive layer 24 is provided with a reinforcing adhesive layer 22; the modulus of the elastic adhesive layer 24 is less than the modulus of the reinforcing adhesive layer 22, and greater than the modulus of the waterproof adhesive layer 20; wherein, the edge of the display layer 12 is provided with a waterproof adhesive layer 20, a reinforcing adhesive layer 22, and an elastic adhesive layer 24, or the edge of the display layer 12 is provided with an elastic adhesive layer 24 and a reinforcing adhesive layer 22, or the edge of the display layer 12 is provided with a reinforcing adhesive layer 22.

[0040] In this embodiment, the third protective layer 2 further includes an elastic adhesive layer 24. During the bending process of the flexible display screen 1, there will be horizontal misalignment between the layered structures. The elastic adhesive layer 24 can accommodate this misalignment during bending, preventing delamination and other problems during the bending process. Furthermore, the outer side of the waterproof adhesive layer 20 is provided with an elastic adhesive layer 24, and the outer side of the elastic adhesive layer 24 is provided with a reinforcing adhesive layer 22, forming a composite structure with the waterproof adhesive layer 20, the reinforcing adhesive layer 22, and the elastic adhesive layer 24, thus improving the protective performance. Additionally, the edges of the display layer 12 are provided with the waterproof adhesive layer 20, the reinforcing adhesive layer 22, and the elastic adhesive layer 24, thereby enhancing the protective performance through the combined action of these three layers. Optionally, the edges of the display layer 12 are provided with either the elastic adhesive layer 24 or the reinforcing adhesive layer 22, to reduce the space occupied by the third protective layer 2 in the width and length of the flexible display screen 1 while still providing protection for the display layer 12.

[0041] Optionally, when the third protective layer 2 includes a waterproof adhesive layer 20, a reinforcing adhesive layer 22, and an elastic adhesive layer 24, the edge of the first protective layer 11 is provided with a waterproof adhesive layer 20, a reinforcing adhesive layer 22, and an elastic adhesive layer 24, or the edge of the first protective layer 11 is provided with a reinforcing adhesive layer 22 and an elastic adhesive layer 24, or the edge of the first protective layer 11 is provided with an elastic adhesive layer 24.

[0042] According to some embodiments of this application, optionally, the waterproof adhesive layer 20 includes any one of the following: an acrylic layer, an epoxy resin layer, a polyurethane elastomer, a thermoplastic elastomer, an ethylene-vinyl acetate copolymer layer, or a polyethylene layer; the elastic adhesive layer 24 includes any one of the following: an acrylic layer, an epoxy resin layer, a polyurethane elastomer, a thermoplastic elastomer, an ethylene-vinyl acetate copolymer layer, or a polyethylene layer; and the reinforcing adhesive layer 22 includes any one of the following: a polycarbonate layer, an epoxy resin layer, a polyamide layer, a polyester layer, a polystyrene layer, a polymethyl methacrylate layer, a polyvinyl chloride layer, a polyvinyl fluoride layer, or a polypropylene layer.

[0043] In this embodiment, the waterproof adhesive layer 20 can be any one of an acrylic layer, an epoxy resin layer, a polyurethane elastomer, a thermoplastic elastomer, an ethylene-vinyl acetate copolymer layer, and a polyethylene layer to achieve the barrier against water and oxygen. The elastic adhesive layer 24 can be any one of an acrylic layer, an epoxy resin layer, a polyurethane elastomer, a thermoplastic elastomer, an ethylene-vinyl acetate copolymer layer, and a polyethylene layer to meet the bending performance requirements of the flexible display screen 1; the reinforcing adhesive layer 22 can be any one of a polycarbonate layer, an epoxy resin layer, a polyamide layer, a polyester layer, a polystyrene layer, a polymethyl methacrylate layer, a polyvinyl chloride layer, a polyvinyl fluoride layer, and a polypropylene layer to improve the protective performance of the flexible display screen 1.

[0044] like Figures 2 to 5As shown, according to some embodiments of this application, optionally, the display module further includes: a hardening layer 14 disposed between the second protective layer 13 and the display layer 12; an adhesive layer 15 disposed between the second protective layer 13 and the hardening layer 14, and disposed between the hardening layer 14 and the display layer 12.

[0045] In this embodiment, the display module further includes a hardening layer 14 located between the second protective layer 13 and the display layer 12, an adhesive layer 15 located between the second protective layer 13 and the hardening layer 14, and an adhesive layer 15 located between the hardening layer 14 and the display layer 12, so as to connect the flexible display screen 1 into a whole.

[0046] It is understandable that, along the stacking direction of the flexible display screen 1, the third protective layer 2 extends from the first protective layer 11 to the second protective layer 13 and wraps around the edge of the second protective layer 13; or, if the third protective layer 2 is located between the side of the second protective layer 13 facing the first protective layer 11 and the side of the first protective layer 11 away from the second protective layer 13, the third protective layer 2 wraps around the edge of the hardening layer 14 and the adhesive layer 15.

[0047] According to some embodiments of this application, a foldable electronic device is also proposed, comprising a display module as described in any of the preceding claims. Therefore, it possesses all the beneficial effects of a display module, which will not be elaborated further here.

[0048] Alternatively, foldable electronic devices include mobile phones, tablets, laptops, and game consoles.

[0049] According to some embodiments of this application, optionally, such as Figures 2 to 6 As shown, the flexible display screen 1 includes a support layer 10, a first protective layer 11, a display layer 12, an adhesive layer 15, a hardening layer 14, and a second protective layer 13 stacked sequentially. The first protective layer 11 is an ultra-thin flexible glass layer (UTG). The ultra-thin flexible glass layer has a modulus of 78 GPa and a strength far exceeding that of PI (Polyimide) or PET (Poly Ethylene Terephthalate). The thickness of the ultra-thin flexible glass layer is 30 μm to 60 μm. UTG exhibits good bending resistance, meeting the folding performance requirements of foldable screens.

[0050] Understandably, the first protective layer 11 and the support layer 10 are located below the display layer 12. In related technologies, the material of the first protective layer 11' has always been PI or PET. However, by setting the first protective layer 11 as an ultra-thin flexible glass layer, that is, by using inorganic materials instead of organic polymer materials, the flexible display screen 1 will no longer undergo plastic deformation, thereby improving the creases of the flexible display screen 1. Furthermore, the strength of the ultra-thin flexible glass layer is much higher than that of PI or PET. Therefore, setting the first protective layer 11 as an ultra-thin flexible glass layer can also improve the strength of the flexible display screen 1 and enhance the performance of the foldable screen.

[0051] To avoid the problem of reduced strength caused by the disappearance of the edge reinforcement layer of the ultra-thin flexible glass layer after the flexible display screen 1 is laser cut in one piece, the ultra-thin flexible glass layer is recessed into the display layer 12, and a third protective layer 2 is set on the edge of the flexible display screen 1. The setting of the third protective layer 2 can protect the ultra-thin flexible glass layer and prevent the flexible display screen 1 from delamination when it is bent.

[0052] Optionally, adhesive can be applied to the edge of the flexible display screen 1 to form a third protective layer 2 on the edge of the flexible display screen 1. After the adhesive application, the flexible display screen 1 can be cut as a whole, thereby reducing the black border effect on the three sides of the flexible display screen 1.

[0053] Optionally, the black border can be reduced by more than 0.3mm due to the setting of the third protective layer 2.

[0054] Optionally, the edges and sides of the flexible display screen 1 can be reinforced and protected by methods such as dotting, spraying, or coating to achieve protection of the flexible display screen 1.

[0055] Optionally, the ultrathin flexible glass layer is recessed at least 0.2 mm from the edge of the display layer 12.

[0056] Understandably, the width of the display module's bezel is generally influenced by both the width of the display layer 12's bezel and the structural design between the second protective layer 13 and the display layer 12. Typically, the second protective layer 13 extends at least 0.3mm beyond the edge of the display layer 12 to protect the first protective layer 11, display layer 12, adhesive layer 15, hardening layer 14, and adhesive layer 15 beneath it. Even after a flush, integral cut using laser technology, the second protective layer 13 still extends at least 0.3mm beyond the display layer 12.

[0057] Optionally, the third protective layer 2 is a polymer material.

[0058] Optionally, such as Figure 7As shown, the third protective layer 2 allows the flexible display screen 1 to be laser-cut away the first protective layer 11, the display layer 12, the adhesive layer 15 between the display layer 12 and the hardening layer 14, the hardening layer 14, the adhesive layer 15 between the hardening layer 14 and the second protective layer 13, and the edge of the second protective layer 13, thereby reducing the bezel by at least 0.3mm. Figure 7 The dimension 'a' indicated by the arrow in the figure represents the dimension that is shortened in the embodiment of this application compared to related technologies.

[0059] Optionally, the third protective layer 2 comprises three layers: a waterproof adhesive layer 20, an elastic adhesive layer 24, and a reinforcing adhesive layer 22.

[0060] 1. The function of the waterproof adhesive layer 20 is to prevent water and oxygen intrusion, protect the display layer 12, and avoid water and oxygen corrosion of the display layer 12. The materials selected are: acrylic, epoxy resin, polyurethane elastomer, thermoplastic elastomer, ethylene-vinyl acetate copolymer, and polyethylene. The modulus is 1 kPa to 500 kPa; the glass transition temperature (Tg) is ≤ -40℃; and the width is 0.1 mm to 0.5 mm. The processing methods are spraying, dispensing, and coating. The curing method is UV rapid curing.

[0061] 2. The function of the elastic adhesive layer 24 is to maintain the bending and misalignment between the various layers of the flexible display screen 1, preventing problems such as bending and delamination. Materials selected include: acrylic, epoxy resin, polyurethane elastomer, thermoplastic elastomer, ethylene-vinyl acetate copolymer, and polyethylene. Modulus: 500kPa~1000kPa; tensile recovery rate ≥95%; Tg≤-40℃; width: 0.1mm~0.3mm. Processing methods: spraying, dispensing, and coating. Curing method: UV rapid curing.

[0062] 3. The function of the reinforcing adhesive layer 22 is to protect the flexible display screen 1 when it is subjected to external impact or drop impact. The materials selected are: polycarbonate, epoxy resin, polyamide, polyester, polystyrene, polymethyl methacrylate, polyvinyl chloride, polyvinyl fluoride, and polypropylene. The modulus is 1 MPa to 100 GPa, the tensile recovery rate is ≥95%, Tg ≤ -30℃, and the width is 0.1 mm to 0.3 mm. The processing methods are: spraying, dispensing, and coating; the curing method is UV rapid curing.

[0063] Optionally, such as Figure 3 As shown, the third protective layer 2 can be adjusted to two layers of materials according to design requirements: waterproof adhesive layer 20 and reinforcing adhesive layer 22.

[0064] Optionally, such as Figure 2As shown, the third protective layer 2 can also be adjusted to a single material, namely a waterproof adhesive layer 20, according to design requirements.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A display module for a foldable electronic device, characterized in that, The display module includes: A flexible display screen includes a support layer, a first protective layer, a display layer, and a second protective layer stacked sequentially. The flexible display screen displays information through the display layer. The second protective layer is located on the display side of the flexible display screen. The first protective layer is an ultra-thin flexible glass layer and extends along the periphery of the flexible display screen. The edge of the first protective layer is recessed within the edge of the display layer. A third protective layer is wrapped around at least a portion of the periphery of the flexible display screen, and the third protective layer wraps around at least the edge of the first protective layer and the edge of the display layer.

2. The display module according to claim 1, characterized in that, Along the stacking direction of the flexible display screen, the sidewalls of the flexible display screen are flush with the third protective layer.

3. The display module according to claim 2, characterized in that, Along the stacking direction of the flexible display screen, the third protective layer extends from the first protective layer to the second protective layer and wraps around the edge of the second protective layer; or The third protective layer is located between the side of the second protective layer facing the first protective layer and the side of the first protective layer away from the second protective layer.

4. The display module according to claim 3, characterized in that, The third protective layer includes a waterproof adhesive layer.

5. The display module according to claim 4, characterized in that, The third protective layer also includes a reinforcing adhesive layer, which is provided on the outer side of the waterproof adhesive layer, and the modulus of the reinforcing adhesive layer is greater than that of the waterproof adhesive layer.

6. The display module according to claim 5, characterized in that, The edge of the display layer is provided with the reinforcing adhesive layer, and the edge of the first protective layer is provided with the waterproof adhesive layer and the reinforcing adhesive layer; or The edge of the display layer is provided with the waterproof adhesive layer and the reinforcing adhesive layer.

7. The display module according to claim 5, characterized in that, The third protective layer further includes an elastic adhesive layer, the outer side of the waterproof adhesive layer is provided with the elastic adhesive layer, and the outer side of the elastic adhesive layer is provided with the reinforcing adhesive layer; The modulus of the elastic adhesive layer is less than that of the reinforcing adhesive layer, but greater than that of the waterproof adhesive layer; The edge of the display layer is provided with the waterproof adhesive layer, the reinforcing adhesive layer and the elastic adhesive layer, or the edge of the display layer is provided with the elastic adhesive layer and the reinforcing adhesive layer, or the edge of the display layer is provided with the reinforcing adhesive layer.

8. The display module according to claim 7, characterized in that, The waterproof adhesive layer includes any one of the following: an acrylic layer, an epoxy resin layer, a polyurethane elastomer, a thermoplastic elastomer, an ethylene-vinyl acetate copolymer layer, or a polyethylene layer; The elastic adhesive layer includes any one of the following: an acrylic layer, an epoxy resin layer, a polyurethane elastomer, a thermoplastic elastomer, an ethylene-vinyl acetate copolymer layer, and a polyethylene layer; The reinforcing adhesive layer includes any one of the following: polycarbonate layer, epoxy resin layer, polyamide layer, polyester layer, polystyrene layer, polymethyl methacrylate layer, polyvinyl chloride layer, polyvinyl fluoride layer, and polypropylene layer.

9. The display module according to any one of claims 1 to 8, characterized in that, Also includes: A hardening layer is disposed between the second protective layer and the display layer; An adhesive layer is disposed between the second protective layer and the hardening layer, and between the hardening layer and the display layer.

10. A foldable electronic device, characterized in that, include: The display module as described in any one of claims 1 to 9.

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