CN111361257A

CN111361257A - Foldable cover plate, foldable screen assembly and electronic equipment

Info

Publication number: CN111361257A
Application number: CN202010312067.4A
Authority: CN
Inventors: 李明阳
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2020-07-03

Abstract

The application provides a foldable cover plate, which is attached to a display surface of a foldable screen and can be folded synchronously with the folding of the foldable screen; the foldable cover plate comprises a packaging layer, a first film layer and a second film layer which are stacked; the second film layer is close to the display surface of the folding screen, the packaging layer is far away from the display surface of the folding screen, and the first film layer is arranged between the packaging layer and the second film layer; the packaging layer, the first film layer and the second film layer are all made of foldable transparent materials. The application provides a collapsible apron improves outermost protective strength through setting up the encapsulation layer, avoids wiping, further through first rete and the second rete of complex so that collapsible apron is whole can have hardness height concurrently, resistant scraping, difficult crease, the ability of buckling is strong, advantage such as the durability is good, and then can promote the life of collapsible apron and user's use experience.

Description

Foldable cover plate, foldable screen assembly and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment structures, in particular to a foldable cover plate, a foldable screen assembly and electronic equipment.

Background

With the development of electronic devices such as mobile phones, full-screen displays have become popular in the market in terms of appearance. However, the development of the full-screen technology leads to the more and more serious homogenization of the mobile phone, and at the moment, a new-form folding mobile phone comes along.

However, the foldable cover plate attached to the surface of the display screen of the foldable mobile phone has many disadvantages, such as low hardness, easy scratching, easy creasing, poor impact resistance, poor bending capability, poor impact resistance, and fragility, which further affects the service life of the foldable mobile phone and reduces the user experience.

Disclosure of Invention

One aspect of the embodiments of the present application provides a foldable cover plate, which is attached to a display surface of a foldable screen and can be folded synchronously with the folding of the foldable screen; the foldable cover plate comprises a packaging layer, a first film layer and a second film layer which are stacked; the second film layer is close to the display surface of the folding screen, the packaging layer is far away from the display surface of the folding screen, and the first film layer is arranged between the packaging layer and the second film layer; the packaging layer, the first film layer and the second film layer are all made of foldable transparent materials.

Another aspect of the embodiments of the present application further provides a foldable screen assembly, including a foldable screen and the foldable cover plate in the foregoing embodiments, the foldable cover plate is fully attached to the display surface of the foldable screen, and can be folded synchronously with the foldable screen.

Further, an embodiment of the present application further provides an electronic device, including a housing and the folding screen assembly in the foregoing embodiment, where the housing is provided with a folding mechanism, and the folding mechanism is arranged corresponding to a folding area of the folding screen; the shell and the folding screen assembly are arranged in an enclosing mode to form an accommodating space, and the accommodating space is used for accommodating components of the electronic equipment.

The embodiment of the application provides a collapsible apron, folding screen subassembly and electronic equipment improves outermost protective strength through setting up the encapsulated layer, avoid wiping, further through first rete of complex and second rete so that collapsible apron is whole can have hardness height concurrently, scrape resistant, be difficult for the crease, advantage such as the ability reinforce of buckling, the durability is good, and then can promote collapsible apron, folding screen subassembly and electronic equipment's life and user's use experience.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of an electronic device in some embodiments of the present application;

FIG. 2 is a schematic, exploded view of an electronic device in some embodiments of the present application;

FIG. 3 is a schematic view of a portion of the cross-sectional configuration of FIG. 1 taken along line A-A;

FIG. 4 is a schematic structural view of a foldable cover in some embodiments of the present application;

FIG. 5 is a schematic view of a foldable cover in other embodiments of the present application;

FIG. 6 is a schematic view of a foldable cover in other embodiments of the present application;

fig. 7 is a schematic view of a foldable cover in other embodiments of the present application.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive work are within the scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As used herein, an "electronic device" (or simply "terminal") includes, but is not limited to, an apparatus that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A cellular phone is an electronic device equipped with a cellular communication module.

It should be noted that the electronic device in the embodiment of the present application is mainly directed to an electronic device having a folding screen assembly, for example, a folding screen mobile phone. Particularly, the foldable screen mobile phone has gradually become the development trend of the whole mobile phone in the future, and has the main advantages of entertainment and office, portability, and meets the demand that consumers seek portability and various and unified functions.

However, the applicant finds in research that, for the folding screen mobile phone, the folding cover plate attached to the display surface of the folding screen has defects such as low hardness, easy scraping, easy creasing, poor impact resistance, poor bending capability, weak impact resistance, and fragility, which further affects the service life of the folding screen mobile phone and reduces the user experience.

For solving the above problem, the thinking of this embodiment technical scheme is that, adopt the collapsible apron of compound rete structure, synthesize the use advantage of each rete for the collapsible apron that has compound rete structure can have hardness height concurrently, scrape resistant, be difficult for the crease, advantage such as the ability is strong, the durability is good of buckling, and then promotes the life of folding screen cell-phone, promotes user's use and experiences.

Further, the embodiment of the application provides a foldable cover plate to realize the technical scheme. Specifically, the foldable cover plate provided by the embodiment of the application is attached to the display surface of the foldable screen of the electronic device, and can be folded synchronously along with the folding of the foldable screen. The electronic device may be any smart device having a folding screen assembly. For example, the electronic device may be a smart device with a folding screen assembly, such as a tablet computer, a mobile phone, an in-vehicle device, and a wearable device. The electronic device provided by the embodiment of the application takes a folding screen mobile phone as an example for exemplary explanation.

Specifically, please refer to fig. 1 and fig. 2 in combination, in which fig. 1 is a schematic structural diagram of an electronic device 1000 according to some embodiments of the present disclosure, fig. 2 is a schematic structural diagram illustrating a structure of the electronic device 1000 according to some embodiments of the present disclosure, and the electronic device 1000 may substantially include the following structures: the folding screen assembly 100 and the housing 200; the folding screen assembly 100 may generally include a foldable cover panel 10 and a folding screen 20, among other things.

Further, the foldable cover 10 is fully attached to the display surface of the foldable screen 20 to protect the foldable screen 20. In addition, the foldable cover 10 can be folded simultaneously with the folding of the folding screen 20. In other words, the foldable screen 20 is attached to the inner surface of the foldable cover 10, and the housing 200 is connected to the foldable cover 10 of the foldable screen assembly 100 and jointly encloses a receiving space 101, where the receiving space 101 is used for receiving internal components of the electronic device 1000. The foldable screen 20 of the foldable screen assembly 100 is disposed in the accommodating space 101.

It should be noted that the foldable screen 20 may be an Active Matrix Organic Light Emitting Diode (AMOLED) display screen. The AMOLED display screen is a self-luminous display screen, and a Back Light Module (BLM) is not required. Therefore, when the substrate in the AMOLED display screen is made of a flexible resin material, such as polyethylene terephthalate (PET), the AMOLED display screen can have a bendable characteristic.

Further, the folding screen 20 may be generally divided into a folding area 21 and a non-folding area 22, and the non-folding area 22 may be generally divided into two spaced-apart portions by the folding area 21. Where the folded region 21 may be folded to allow the folded screen 20 to be folded at an angle, the unfolded region 22 is generally not foldable. For example, the folding region 21 may be gradually folded from a plane to a curved surface during the folding process, and the folding region 21 may also be gradually unfolded from a curved surface to a plane during the unfolding process.

Referring to fig. 3, fig. 3 is a schematic partial sectional view taken along a-a direction in fig. 1, in which a housing 200 is provided with a folding mechanism 201, and the folding mechanism 201 is disposed corresponding to a folding area 21 of the folding screen 20. When the electronic device 1000 provided by the embodiment of the application is folded, the housing 200 and the foldable screen assembly 100 are synchronously folded through the folding mechanism 201, so that the foldable cover plate 10 and the foldable screen 20 are synchronously folded, and a user can operate the electronic device conveniently.

It is understood that the folding mechanism 201 may be a hinge mechanism, an elastic mechanism, etc., and it is within the understanding of those skilled in the art that the detailed technical features of this part and the connection relationship between the folding mechanism 201 and the housing 200 will not be described in detail herein. In the embodiment of the present application, the folding mechanism 201 may adopt a hinge mechanism or a hinge mechanism to provide a better folding feel when the electronic device 1000 is folded.

Of course, in other embodiments, the housing 200 may be made of a flexible material to further enhance the use experience when folded. The housing 200 may be integrally formed by using a flexible material, or may be formed by separately forming a hard material and then splicing with the folding mechanism 201, and the detailed technical features of the housing 200 are within the understanding of those skilled in the art and will not be described in detail herein.

Further, please refer to fig. 4, fig. 4 is a schematic diagram of a film structure of the foldable cover 10 according to some embodiments of the present application, in which the foldable cover 10 is attached to the display surface of the foldable screen 20 and can be folded synchronously with the folding of the foldable screen 20.

Specifically, the foldable cover 10 may generally include an encapsulation layer 11, a first film layer 12, and a second film layer 13, which are stacked. The second film layer 13 is close to the display surface of the folding screen 20, the packaging layer 11 is far away from the display surface of the folding screen 20, and the first film layer 12 is disposed between the packaging layer 11 and the second film layer 13. In other words, the second film layer 13 is attached to the display surface of the foldable screen 20, the first film layer 12 is attached to the surface of the second film layer 13 away from the foldable screen 20, and the encapsulation layer 11 is formed on the surface of the first film layer 12 away from the second film layer 13.

Further, the packaging layer 11, the first film layer 12 and the second film layer 13 are made of foldable transparent materials, on one hand, the foldable cover plate 10 can be folded synchronously when the foldable screen 20 is folded, and on the other hand, the foldable cover plate 10 made of the transparent materials is attached to the display surface of the foldable screen 20 to have good light transmittance, and the display effect of the foldable screen 20 cannot be influenced.

Specifically, the package layer 11 has the characteristics of high surface hardness, scratch resistance, and low tendency to crease, and thus can improve the protection strength of the outermost layer of the foldable cover 10. First rete 12 can have characteristics such as the ability of buckling is strong, the durability is good at least, and second rete 13 can have hardness height, be difficult for characteristics such as crease at least to can make collapsible apron 10 have first rete 12 and second rete 13's advantage concurrently when compound rete, and then promote the life of collapsible apron 10, experience with the use that promotes the user.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

The embodiment of the application provides a collapsible apron improves outermost protective strength through setting up the encapsulation layer, avoids wiping, further through first rete and the second rete of complex so that collapsible apron is whole can have hardness height concurrently, resistant scraping, be difficult for the crease, the ability of buckling is strong, advantage such as the durability is good, and then promotes the life of folding screen cell-phone, promotes user's use and experiences.

It should be noted that the terms "first", "second" and "third" in the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.

Further, the encapsulation layer 11 is directly coated on the side of the first film layer 12 away from the folding screen 20 to reduce the overall structural thickness of the foldable cover 10.

Specifically, a layer of inorganic silicide forming transparent encapsulation layer 11 may be directly coated on the surface of the first film layer 12 away from the folding screen 20. The encapsulation layer 11 is directly coated on the first film layer 12 and can be folded synchronously with the folding of the first film layer 12, and the thickness of the encapsulation layer 11 can be approximately 2-20 μm.

As can be appreciated, the encapsulation layer 11 is too thick to facilitate the folding of the cover plate and is prone to cracking during the folding process; the encapsulation layer 11 is too thin and its hardness and scratch resistance will be somewhat affected. Therefore, by controlling the thickness of the encapsulation layer 11 within a certain range, the overall characteristics and the lifetime of the foldable cover 10 can be further optimized. The applicant found in the research that when the thickness of the encapsulation layer 11 is in the range of about 2 to 20 μm, the folding effect of the foldable cover plate 10 as a whole is not affected, and the hardness and scratch resistance are not affected. Further, the thickness of the encapsulation layer 11 may be 2 μm, 3 μm, 5 μm, 10 μm, 20 μm, and the like.

Further, the encapsulation layer 11 is directly coated on the surface of the first film layer 12 by using an inorganic silicide to protect the surface of the first film layer 12, and simultaneously, the hardness of the surface of the first film layer 12 can be enhanced to improve the scratch resistance. For example, the first film layer 12 may be directly coated with the encapsulation layer 11 by a slit coating process, which is simple in process, easy to control the coating speed, and thus able to effectively control the thickness of the encapsulation layer 11.

Of course, in other embodiments, other coating processes may be used to form the encapsulation layer 11 directly on the surface of the first film layer 12, which is not specifically limited in this application.

The embodiment of the application provides a foldable cover plate, the outermost protective strength is improved through the packaging layer that sets up certain thickness, when strengthening first rete surface hardness, the promotion is able to bear or endure to scrape the performance.

In other embodiments of the present application, please refer to fig. 5, fig. 5 is a schematic structural diagram of a foldable cover 10 in other embodiments of the present application, and the foldable cover 10 may further include a protective layer 14. The protection layer 14 is attached to the surface of the encapsulation layer 11 away from the folding screen 20, so as to further protect the first film layer 12.

Specifically, the protective layer 14 is attached to one side of the packaging layer 11 far away from the folding screen 20 through the first colloid 141, and the first colloid 141 can well fixedly connect the protective layer 14 with the packaging layer 11, so as to improve the stability of the overall structure.

Further, the protective layer 14 is made of transparent polyethylene terephthalate (PET), which has excellent physical and mechanical properties in a wide temperature range, can reach 120 ℃ for a long time, has excellent electrical insulation, and has good electrical properties, creep resistance, fatigue resistance, friction resistance and dimensional stability even at high temperature and high frequency.

The first colloid 141 is made of at least one of an oca (optical Clear adhesive) optical adhesive or a pressure sensitive adhesive. The OCA optical adhesive is used for cementing a special adhesive of a transparent optical element, and has the characteristics of colorless transparency, light transmittance of over 90 percent, good cementing strength, capability of being cured at room temperature or intermediate temperature and the like. Pressure Sensitive Adhesives (PSAs) are viscoelastic bodies that have both liquid viscous properties and solid elastic properties, and that have both the effects and properties of withstanding the contact and failure processes of bonding.

It can be understood that the protective layer 14 and the encapsulation layer 11 connected by the first colloid 141 do not have a great influence on the overall light transmittance of the foldable cover 10, i.e., the first colloid 141 is substantially transparent.

The embodiment of the application provides a collapsible apron through forming the one deck protective layer on the encapsulation layer surface for collapsible apron possesses stronger resistant scraping nature, and the protective layer can further protect first rete, avoids first rete to receive the printing opacity effect that destroys the collapsible apron of influence.

In other embodiments of the present application, the encapsulation layer 11 may also be made of flexible glass. Specifically, referring to fig. 6, fig. 6 is a schematic structural diagram of a foldable cover 10 according to other embodiments of the present application, wherein the encapsulation layer 11 is made of flexible glass.

Further, the flexible glass may be made of foldable Ultra glass (UTG). UTG has the advantages of high surface hardness, scratch resistance, no easy crease, heat resistance, good light transmittance, good bendability, etc. The super-glass is used as the packaging layer of the foldable cover plate 10, so that the scratch resistance of the foldable cover plate 10 can be improved, and the folding performance of the foldable cover plate 10 cannot be influenced.

It will be appreciated that when considering the overall structural thickness of the foldable cover 10, the thickness of UTG will typically be in the range of 30-100 μm, for example, UTG may be 30 μm, 50 μm, 70 μm, 100 μm, etc.

Of course, in other embodiments, the flexible glass may be other foldable glass to improve the surface hardness and scratch resistance of the foldable cover plate 10.

Further, the encapsulation layer 11 is attached to a side of the first film 12 away from the folding screen 20 through the second adhesive 111, that is, flexible glass is attached to a side of the first film 12 away from the folding screen 20 to form the encapsulation layer 11. Wherein, the second colloid 111 is made of at least one of OCA optical adhesive or pressure sensitive adhesive.

Further, the second film layer 13 is attached to the side of the first film layer 12 close to the folding screen 20 through the third glue 121, that is, the second film layer 13 is attached to the side of the first film layer 12 close to the folding screen 20. The third colloid 121 is made of at least one of OCA optical adhesive or pressure-sensitive adhesive.

Specifically, the first film layer 12 may be made of a flexible Polyimide (PI) film, and the second film layer 13 may be made of a flexible glass. Polyimide has excellent mechanical properties, for example, high bending ability, good durability, and the like. The first film layer 12 made of PI has the advantages of strong bending ability, good durability and the like, and the second film layer 13 made of UTG has the characteristics of high surface hardness, scratch resistance, difficulty in forming creases, good heat resistance, good light transmittance, good bendability and the like. Further, the foldable cover plate 10 formed by compounding the first film layer 12 and the second film layer 13 can have the characteristics of the first film layer 12 and the second film layer 13, so that the service life of the foldable cover plate 10 and the use experience of a user are prolonged.

Further, the first film layer 12 is generally made of PI film with better light transmittance in consideration of light transmittance of the foldable cover 10, for example, the first film layer 12 may be made of colorless transparent Polyimide (CPI) film. It will be appreciated that the CPI typically has a thickness in the range of 30-100 μm, for example UTG may have a thickness of 30 μm, 40 μm, 80 μm, 100 μm, etc., when considering the overall structural thickness of the foldable cover 10.

The embodiment of the application provides a collapsible apron through first rete of complex and the setting of second rete structure to make collapsible apron can have hardness height concurrently, resistant scraping, be difficult for the crease, buckle advantages such as ability reinforce, the durability is good, and then can promote the life of folding screen cell-phone and user's use experience.

In other embodiments of the present application, the foldable cover sheet may further comprise a third film layer. Specifically, referring to fig. 7, fig. 7 is a schematic structural diagram of a foldable cover 10 according to other embodiments of the present application, wherein the foldable cover 10 may further include a third film layer 15.

Specifically, the third film layer 15 is disposed on a side of the second film layer 13 close to the foldable screen 20, and is attached to a side of the second film layer 13 close to the foldable screen 20 through the fourth colloid 131. In other words, the third film layer 15 is applied to the side of the second film layer 13 adjacent to the folding screen 20. The fourth colloid 131 is made of at least one of OCA optical adhesive or pressure-sensitive adhesive.

Further, the third film layer 15 may be made of a flexible Polyimide (PI) film, which has excellent mechanical properties. Specifically, the third film layer 15 is generally made of PI film with better light transmittance in consideration of light transmittance of the foldable cover 10, for example, the third film layer 15 may be made of colorless transparent polyimide (CPI) film.

It can be understood that the third film layer 15 is disposed on the side of the second film layer 13 close to the folding screen 20, so that the folding screen 20 can be prevented from being damaged when being folded due to the higher hardness of the second film layer 13. That is, it can be considered that the third film layer 15 is disposed between the second film layer 13 and the foldable screen 20, which not only provides excellent folding and bending performance, but also protects the foldable screen 20 to a certain extent.

The foldable cover plate provided by the embodiment of the application is provided with the third film layer, so that the foldable cover plate can further protect the foldable screen of the attached foldable cover plate while having the structural characteristics of the third film layer, and the service life of a mobile phone with the foldable screen and the use experience of a user can be prolonged.

In addition, another aspect of the embodiments of the present application further provides a foldable screen assembly, which may generally include a foldable screen and a foldable cover plate, wherein the foldable cover plate is fully attached to a display surface of the foldable screen and can be folded synchronously with the folding of the foldable screen. It should be noted that, for the detailed structure and connection relationship of the foldable screen and the foldable cover plate, reference may be made to the related description of the foregoing embodiments, and details are not repeated here.

Further, the thickness of the foldable cover plate may be approximately 100 μm to 400 μm, for example, 100 μm, 200 μm, 400 μm, and the like. The thickness of the folding screen may be approximately 300 μm to 600 μm, for example, 300 μm, 400 μm, 500 μm, 600 μm, etc., so as to realize a light and thin structural design of the folding screen assembly.

The folding screen assembly provided by the embodiment of the application is completely attached to the display surface of the folding screen through the foldable cover plate, so that the foldable cover plate can further protect the folding screen when the folding screen is folded synchronously, scratch of the folding screen is avoided, and the service life of the folding screen assembly is prolonged, and the user experience is improved.

In addition, this application embodiment still provides an electronic equipment, and this electronic equipment includes casing and folding screen subassembly, and the casing is provided with folding mechanism, and this folding mechanism corresponds the folding region setting of folding screen. Furthermore, the shell and the folding screen assembly are arranged in an enclosing mode to form an accommodating space, and the accommodating space is used for accommodating components of the electronic equipment. It should be noted that, for the detailed structure and connection relationship of the housing and the foldable screen assembly, reference may be made to the related description of the foregoing embodiments, and details are not repeated here.

The electronic equipment that this application embodiment provided is through setting up the display surface that collapsible apron is whole in folding screen for collapsible apron can further protect folding screen when folding in step along with folding screen is folding, avoids folding screen scratch, with life and the user experience who promotes electronic equipment.

It is noted that the terms "comprises" and "comprising," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The above description is only a part of the embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent devices or equivalent processes performed by the content of the present application and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A foldable cover plate is characterized in that the foldable cover plate is attached to a display surface of a foldable screen and can be synchronously folded along with the folding of the foldable screen; the foldable cover plate comprises a packaging layer, a first film layer and a second film layer which are stacked;

the second film layer is close to the display surface of the folding screen, the packaging layer is far away from the display surface of the folding screen, and the first film layer is arranged between the packaging layer and the second film layer; the packaging layer, the first film layer and the second film layer are all made of foldable transparent materials.

2. The foldable cover sheet of claim 1 wherein the encapsulation layer is applied directly to the side of the first film layer remote from the foldable screen.

3. The foldable cover sheet of claim 2 further comprising a protective layer attached to the side of the encapsulant layer away from the foldable screen by a first adhesive.

4. The foldable cover of claim 3, wherein the first glue is made of at least one of OCA optical glue or pressure sensitive glue.

5. The foldable cover sheet of claim 1, wherein the encapsulation layer is attached to a side of the first film layer away from the foldable screen by a second adhesive.

6. The foldable cover sheet of claim 5 wherein the encapsulation layer is made of flexible glass.

7. The foldable cover of claim 1, wherein the second film layer is attached to the first film layer on a side thereof adjacent to the foldable screen by a third adhesive.

8. The foldable cover of claim 7, wherein the first film layer is made of a flexible polyimide film and the second film layer is made of a flexible glass.

9. The foldable cover of claim 7, further comprising a third film layer, wherein a fourth glue is applied to the second film layer on a side of the foldable screen adjacent to the foldable screen.

10. The foldable cover of claim 9, wherein the third film layer is made of a transparent flexible polyimide film.

11. A foldable screen assembly comprising a foldable screen and a foldable cover as claimed in any one of claims 1 to 10, the foldable cover being conformable to a display surface of the foldable screen and foldable synchronously with the folding of the foldable screen.

12. An electronic device, comprising a housing and the foldable screen assembly of claim 11, wherein the housing is provided with a folding mechanism, and the folding mechanism is arranged corresponding to a folding area of the foldable screen; the shell and the folding screen assembly are arranged in an enclosing mode to form an accommodating space, and the accommodating space is used for accommodating components of the electronic equipment.