CN111361257A - Foldable covers, folding screen assemblies, and electronic devices - Google Patents

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 covers, folding screen assemblies, and electronic devices

technical field

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

Background technique

With the development of electronic devices such as mobile phones, in terms of appearance, full-screen displays have become popular in the market. However, the development of full-screen technology has led to more and more homogenization of mobile phones. At this time, a new form of folding mobile phone came into being.

However, the folding cover attached to the display surface of the folding mobile phone has many disadvantages, such as low hardness, easy to scratch, easy to crease, poor impact resistance, poor bending ability, impact resistance, fragile, etc., and then Affect the service life of the folding mobile phone and reduce the user experience.

SUMMARY OF THE INVENTION

In one aspect, the embodiments of the present application provide a foldable cover plate, the foldable cover plate is attached to the display surface of the folding screen, and can be folded synchronously with the folding of the folding screen; the foldable cover plate includes a laminated The provided encapsulation layer, the first film layer and the second film layer; wherein, 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 The layer is arranged between the encapsulation layer and the second film layer; the encapsulation 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 folding screen assembly, which includes a folding screen and the foldable cover plate described in the foregoing embodiments, wherein the foldable cover plate is fully attached to the display surface of the folding screen, and can be folded synchronously with the folding of the folding screen.

Further, an embodiment of the present application further provides an electronic device, including a casing and the folding screen assembly described in the foregoing embodiments, the casing is provided with a folding mechanism, and the folding mechanism corresponds to the folding of the folding screen Regional setting; the casing and the folding screen assembly are surrounded to form an accommodating space, and the accommodating space is used for accommodating the components of the electronic device.

In the foldable cover plate, the foldable screen assembly and the electronic device provided by the embodiments of the present application, the protection strength of the outermost layer is improved by providing an encapsulation layer to avoid scratching, and further through the composite first film layer and the second film layer, the The folding cover as a whole can have the advantages of high hardness, scratch resistance, not easy to crease, strong bending ability, good durability, etc., which can improve the service life of the foldable cover, folding screen components and electronic equipment as well as the user's convenience. Use experience.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

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

FIG. 2 is a schematic structural disassembly diagram of an electronic device in some embodiments of the present application;

Fig. 3 is the partial cross-sectional structure schematic diagram along the A-A direction in Fig. 1;

4 is a schematic structural diagram of a foldable cover in some embodiments of the present application;

5 is a schematic structural diagram of a foldable cover plate in other embodiments of the present application;

6 is a schematic structural diagram of a foldable cover plate in other embodiments of the present application;

FIG. 7 is a schematic structural diagram of a foldable cover plate in other embodiments of the present application.

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is particularly pointed out that the following examples are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following embodiments are only some of the embodiments of the present application, but not all of the embodiments, and all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection 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 present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

"Electronic equipment" (or simply "terminal") as used herein includes, but is not limited to, is configured to be connected via a wired line (eg, via a public switched telephone network (PSTN), digital subscriber line (DSL), digital cable, Direct cable connection, and/or another data connection/network) and/or via (eg, for cellular networks, wireless local area networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters , and/or another communication terminal's) wireless interface to receive/send communication signals. A communication terminal arranged to communicate through 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; Personal Communication System (PCS) terminals that may combine cellular radio telephones with data processing, fax, and data communication capabilities; may include radio telephones, pagers, Internet/Intranet access , a PDA with a web browser, memo pad, calendar, and/or a global positioning system (GPS) receiver; and conventional laptop and/or palm receivers or other electronic devices including radiotelephone transceivers. A mobile phone is an electronic device equipped with a cellular communication module.

It should be noted that the electronic device in the embodiments of the present application is mainly aimed at an electronic device having a folding screen assembly, for example, a folding screen mobile phone. Specifically, the folding screen mobile phone has gradually become the development trend of the whole machine in the future.

However, the applicant found in the research that for the folding screen mobile phone, the folding cover attached to the display surface of the folding screen has problems such as low hardness, easy to scratch, easy to crease, poor impact resistance, poor bending ability, poor resistance Defects such as impact and fragility will affect the service life of the folding screen mobile phone and reduce the user experience.

In order to solve the above problems, the idea of the technical solution in this embodiment is to adopt a foldable cover plate with a composite film layer structure, and integrate the advantages of each film layer, so that the foldable cover plate with a composite film layer structure can have both high hardness, It has the advantages of scratch resistance, not easy to crease, strong bending ability, good durability, etc., thereby improving the service life of the folding screen mobile phone and improving the user experience.

Further, the embodiment of the present application provides a foldable cover to realize the above technical solution. Specifically, the foldable cover provided by the embodiment of the present application is attached to the display surface of the folding screen of the electronic device, and can be folded synchronously with the folding of the folding screen. The electronic device can be any smart device with a folding screen assembly. For example, the electronic device may be a tablet computer, a mobile phone, a vehicle-mounted device, a wearable device, or other smart device with a folding screen component. The electronic device provided by the embodiment of the present application is exemplified by taking a mobile phone with a folding screen as an example.

Specifically, please refer to FIG. 1 and FIG. 2 in combination. FIG. 1 is a schematic structural diagram of an electronic device 1000 in some embodiments of the present application, and FIG. 2 is a schematic structural disassembly diagram of the electronic device 1000 in some embodiments of the present application. The electronic device 1000 may generally include the following structures: a folding screen assembly 100 and a housing 200 ; wherein, the folding screen assembly 100 may generally include a foldable cover 10 and a folding screen 20 .

Further, the foldable cover 10 is fully attached to the display surface of the folding screen 20 to protect the folding screen 20 . In addition, the foldable cover 10 can be folded synchronously with the folding of the folding screen 20 . In other words, the folding screen 20 is attached to the inner surface of the foldable cover 10 , and the casing 200 is connected to the foldable cover 10 of the folding screen assembly 100 , and together form an accommodating space 101 , and the accommodating space 101 is used for The internal components of the electronic device 1000 are accommodated. The folding screen 20 of the folding screen assembly 100 is arranged in the accommodating space 101 .

It should be noted that the folding screen 20 may be an active matrix organic light emitting diode (active matrix organic light emitting diode, AMOLED) display screen. As a self-illuminating display, the AMOLED display does not need a backlight module (BLM). Therefore, when the base substrate in the AMOLED display screen is made of a flexible resin material, such as polyethylene terephthalate (polyethylene terephthalate, PET), the AMOLED display screen can have a bendable property.

Further, the folding screen 20 can be roughly divided into a folding area 21 and a non-folding area 22 , and the non-folding area 22 can be roughly divided into two parts spaced by the folding area 21 . Wherein, the folding area 21 can be folded so that the folding screen 20 is folded at a certain angle, and the non-folding area 22 is generally not foldable. For example, the folding area 21 may be gradually folded from a flat surface to a curved surface during the folding process, and the folding area 21 may also be gradually flattened from a curved surface to a flat surface during the flattening process.

Please refer to FIG. 3 . FIG. 3 is a partial cross-sectional structural diagram along the A-A direction in FIG. 1 . When the electronic device 1000 provided in the embodiment of the present application is folded, the casing 200 and the folding screen assembly 100 are folded synchronously through the folding mechanism 201, thereby realizing the synchronous folding of the foldable cover 10 and the folding screen 20, so as to facilitate user operation.

It can be understood that the folding mechanism 201 can be a hinge mechanism, a rotating shaft mechanism, an elastic mechanism, etc. The detailed technical features of this part and the connection relationship between the folding mechanism 201 and the casing 200 are within the understanding of those skilled in the art. No further details. In the embodiment of the present application, the folding mechanism 201 may adopt a hinge mechanism or a rotating shaft mechanism, so as to provide a better folding feel when the electronic device 1000 is folded.

Of course, in other embodiments, the casing 200 may be made of a flexible material, so as to further improve the use experience when folded. The casing 200 can be integrally formed with a flexible material, or can be formed by splicing a rigid material with the folding mechanism 201 after being formed separately. The detailed technical characteristics of the casing 200 are within the understanding of those skilled in the art, and are not described here. detail.

Further, please refer to FIG. 4 . FIG. 4 is a schematic diagram of the film layer structure of the foldable cover plate 10 in some embodiments of the present application. The foldable cover plate 10 is attached to the display surface of the folding screen 20 and can follow the folding screen. 20 folds while simultaneously folded.

Specifically, the foldable cover plate 10 may generally include an encapsulation layer 11 , a first film layer 12 and a second film layer 13 which are arranged in layers. The second film layer 13 is close to the display surface of the folding screen 20 , the packaging layer 11 is far 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 adhered to the display surface of the folding screen 20 , the first film layer 12 is adhered to the surface of the second film layer 13 away from the folding screen 20 , and the encapsulation layer 11 is formed on the first film layer 12 away from the folding screen 20 . the surface of the second film layer 13 .

Further, the encapsulation layer 11, the first film layer 12 and the second film layer 13 are all made of foldable transparent materials. On the one hand, the foldable cover plate 10 can be folded synchronously when the folding screen 20 is folded. The foldable cover 10 made of transparent material is attached to the display surface of the folding screen 20 and has good light transmittance, and will not affect the display effect of the folding screen 20 .

Specifically, the encapsulation layer 11 may generally have the characteristics of high surface hardness, scratch resistance, and resistance to creases, etc., thereby improving the protection strength of the outermost layer of the foldable cover plate 10 . The first film layer 12 can at least have the characteristics of strong bending ability and good durability, and the second film layer 13 can at least have the characteristics of high hardness and not easy to crease, so that the foldable cover plate 10 can be made when the film layers are combined. The advantages of both the first film layer 12 and the second film layer 13 are combined, thereby increasing the service life of the foldable cover 10 and improving the user experience.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relationship between the various components under a certain posture (as shown in the drawings). If the specific posture changes, the directional indication also changes accordingly.

In the foldable cover provided by the embodiment of the present application, the protective strength of the outermost layer is improved by providing an encapsulation layer to avoid scratches, and the composite first film layer and the second film layer are further combined so that the entire foldable cover can have both It has the advantages of high hardness, scratch resistance, not easy to creases, strong bending ability, good durability, etc., thereby improving the service life of folding screen mobile phones and improving the user experience.

It should be noted that the terms "first", "second" and "third" in this application are only used for description purposes, and should not be interpreted as indicating or implying relative importance or indicating the indicated technical features. quantity. Thus, a feature defined as "first", "second", "third" may expressly or implicitly include at least one of that feature. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

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 plate 10 .

Specifically, a layer of inorganic silicide may be directly coated on the surface of the first film layer 12 away from the folding screen 20 to form the transparent encapsulation layer 11 . 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.

It can be understood that if the encapsulation layer 11 is too thick, it is not conducive to the folding of the cover plate, and it is easy to crack during the folding process; if the encapsulation layer 11 is too thin, its hardness and scratch resistance will be affected to a certain extent. Therefore, by controlling the thickness of the encapsulation layer 11 within a certain range, the overall characteristics and service life of the foldable cover plate 10 can be further optimized. The applicant found in research that when the thickness of the encapsulation layer 11 is in the range of about 2-20 μm, it will neither affect the overall folding effect of the foldable cover 10 nor affect its hardness and scratch resistance. 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, so as to protect the surface of the first film layer 12, and at the same time, the hardness of the surface of the first film layer 12 can be strengthened, and the scratch resistance can be improved. performance. For example, the encapsulation layer 11 can be directly coated on the surface of the first film layer 12 by a slot coating process. The slot coating process has a simple process and is easy to control the coating speed, thereby effectively controlling the thickness of the encapsulation layer 11 .

Of course, in other embodiments, the encapsulation layer 11 may also be directly formed on the surface of the first film layer 12 by using other coating processes, which is not specifically limited in this embodiment of the present application.

In the foldable cover provided by the embodiment of the present application, the protective strength of the outermost layer is improved by providing an encapsulation layer with a certain thickness, and the scratch resistance performance is improved while the surface hardness of the first film layer is strengthened.

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

Specifically, the protective layer 14 is attached to the side of the encapsulation layer 11 away from the folding screen 20 through the first glue 141 , and the first glue 141 can well firmly connect the protective layer 14 and the encapsulation layer 11 to improve the overall structure. stability.

Further, the protective layer 14 is made of transparent polyethylene terephthalate (polyethylene glycolterephthalate, referred to as PET) material. PET has excellent physical and mechanical properties in a wide temperature range, and the long-term use temperature can reach 120 °C. ℃, excellent electrical insulation, even at high temperature and high frequency, its electrical properties are still good, creep resistance, fatigue resistance, friction resistance, dimensional stability are very good.

The first colloid 141 is made of at least one of OCA (Optically Clear Adhesive) optical adhesive or pressure-sensitive adhesive. OCA optical adhesive is a special adhesive used for bonding transparent optical components. It has the characteristics of colorless and transparent, light transmittance above 90%, good bonding strength, and can be cured at room temperature or medium temperature. Pressure Sensitive Adhesives (PSA) is a viscoelastic body that has both the viscous properties of liquids and the elastic properties of solids. influencing factors and nature.

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

In the foldable cover plate provided by the embodiment of the present application, a protective layer is formed on the surface of the encapsulation layer, so that the foldable cover plate has strong scratch resistance, and the protective layer can further protect the first film layer to avoid The damage of the first film layer affects the light transmission effect of the foldable cover plate.

In other embodiments of the present application, the encapsulation layer 11 may also be made of flexible glass. Specifically, please refer to FIG. 6 , which is a schematic structural diagram of the foldable cover plate 10 in other embodiments of the present application, wherein the encapsulation layer 11 is made of flexible glass.

Further, the flexible glass can be made of foldable Ultra thin glass (UTG). UTG has the characteristics of high surface hardness, scratch resistance, not easy to crease, heat resistance, good light transmission and good flexibility. Using the super glass as the encapsulation layer of the foldable cover 10 can improve the scratch resistance of the foldable cover 10 without affecting the folding performance of the foldable cover 10 .

It can be understood that when considering the overall structural thickness of the foldable cover plate 10 , the thickness of the UTG is generally in the range of 30-100 μm, for example, the thickness of the UTG can be 30 μm, 50 μm, 70 μm, 100 μm, etc.

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

Further, the encapsulation layer 11 is attached to the side of the first film layer 12 away from the folding screen 20 through the second glue 111 , that is, the flexible glass is attached to the surface of the first membrane layer 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.

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

Specifically, the first film layer 12 can be made of a flexible polyimide (Polyimide, PI) film, and the second film layer 13 can be made of flexible glass. Polyimide has excellent mechanical properties, such as strong bending ability and good durability. The first film layer 12 made of PI also generally has the advantages of strong bending ability and good durability, and the second film layer 13 made of UTG generally has high surface hardness, scratch resistance, and is not easy to crease , heat resistance, good light transmission and good flexibility. Further, the foldable cover plate 10 with the first film layer 12 and the second film layer 13 combined can have the characteristics of the first film layer 12 and the second film layer 13, thereby improving the service life of the foldable cover plate 10 and improving the user experience. user experience.

Further, based on the light transmittance of the foldable cover plate 10, the first film layer 12 is generally made of a PI film with better light transmittance. For example, the first film layer 12 can be made of colorless transparent polyimide ( Colourless Polyimide, CPI) film. It can be understood that when considering the overall structural thickness of the foldable cover plate 10 , the thickness of the CPI is generally in the range of 30-100 μm, for example, the thickness of the UTG can be 30 μm, 40 μm, 80 μm, 100 μm, and the like.

The foldable cover plate provided by the embodiment of the present application is provided by the composite first film layer and the second film layer structure, so that the foldable cover plate can have high hardness, scratch resistance, not easy to crease, and bending ability. It has the advantages of strong strength and good durability, which can improve the service life of the folding screen mobile phone and the user experience.

In other embodiments of the present application, the foldable cover may further comprise a third film layer. Specifically, please refer to FIG. 7 , which is a schematic structural diagram of the foldable cover 10 in 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 the side of the second film layer 13 close to the folding screen 20 , and is attached to the side of the second film layer 13 close to the folding screen 20 through the fourth glue 131 . In other words, the third film layer 15 is attached to the surface of the second film layer 13 close 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 can be made of a flexible polyimide (PI) film, and polyimide has excellent mechanical properties. Specifically, based on the light transmittance of the foldable cover 10, the third film layer 15 is generally made of a PI film with better light transmittance. For example, the third film layer 15 can be made of colorless and transparent polyimide. (ColourlessPolyimide, CPI) film.

It can be understood that, disposing the third film layer 15 on the side of the second film layer 13 close to the folding screen 20 can avoid damage to the folding screen 20 during folding due to the high hardness of the second film layer 13 . That is to say, when the third film layer 15 is placed between the second film layer 13 and the folding screen 20, it can not only provide excellent folding and bending performance, but also protect the folding screen 20 to a certain extent.

The foldable cover provided by the embodiment of the present application is provided with a third film layer, so that the foldable cover not only has the structural characteristics of the third film layer, but also can further carry out the foldable screen to which the foldable cover is attached. protection, which can improve the service life of the folding screen mobile phone and the user experience.

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

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

In the folding screen assembly provided by the embodiment of the present application, the foldable cover plate is fully attached to the display surface of the folding screen, so that the foldable cover plate can further protect the folding screen when it is folded synchronously with the folding screen. , to avoid scratches on the folding screen, so as to improve the service life of the folding screen components and the user experience.

In addition, an embodiment of the present application also provides an electronic device, the electronic device includes a housing and a folding screen assembly, the housing is provided with a folding mechanism, and the folding mechanism is provided corresponding to a folding area of the folding screen. Further, the housing and the folding screen assembly enclose an accommodating space, and the accommodating space is used for accommodating the components of the electronic device. It should be noted that, for the detailed structure and connection relationship of the casing and the folding screen assembly, reference may be made to the relevant descriptions of the foregoing embodiments, which will not be repeated here.

In the electronic device provided by the embodiment of the present application, by setting the foldable cover to be fully attached to the display surface of the folding screen, the foldable cover can further protect the folding screen when the folding screen is folded and folded synchronously. Avoid scratches on the folding screen to improve the service life of electronic devices and user experience.

It should be noted that the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes Other steps or units inherent to these processes, methods, products or settings.

The above descriptions are only part of the embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent device or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied to other related The technical field is similarly included in the scope of patent protection of this application.

Claims (12)

1. A foldable cover, characterized in that the foldable cover is attached to the display surface of the folding screen, and can be folded synchronously with the folding of the folding screen; an encapsulation layer, a first film layer and a second film layer; Wherein, 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 disposed between the packaging layer and the second film layer The encapsulation layer, the first film layer and the second film layer are all made of foldable transparent materials. 2 . The foldable cover plate according to claim 1 , wherein the encapsulation layer is directly coated on the side of the first film layer away from the folding screen. 3 . 3 . The foldable cover plate according to claim 2 , wherein the foldable cover plate further comprises a protective layer, and the protective layer is adhered to the area of the packaging layer away from the folding screen through a first glue. 4 . side. 4 . The foldable cover plate according to claim 3 , wherein the first colloid is made of at least one of OCA optical adhesive or pressure-sensitive adhesive. 5 . 5 . The foldable cover plate according to claim 1 , wherein the encapsulation layer is adhered to the side of the first film layer away from the folding screen through a second glue. 6 . 6. The foldable cover plate according to claim 5, wherein the encapsulation layer is made of flexible glass. 7 . The foldable cover plate according to claim 1 , wherein the second film layer is attached to a side of the first film layer close to the folding screen through a third glue. 8 . 8 . The foldable cover plate according to claim 7 , wherein the first film layer is made of flexible polyimide film, and the second film layer is made of flexible glass. 9 . 9 . The foldable cover plate according to claim 7 , wherein the foldable cover plate further comprises a third film layer, and the third film layer transmits light and a fourth colloid is attached to the second film. 10 . The layer is close to one side of the folding screen. 10 . The foldable cover plate according to claim 9 , wherein the third film layer is made of transparent flexible polyimide film. 11 . 11. A folding screen assembly, characterized in that it comprises a folding screen and the foldable cover plate according to any one of claims 1-10, wherein the foldable cover plate is fully attached to the display surface of the folding screen, and can be folded synchronously with the folding of the folding screen. 12. An electronic device, comprising a casing and the folding screen assembly according to claim 11, wherein the casing is provided with a folding mechanism, and the folding mechanism is arranged corresponding to a folding area of the folding screen; the The casing and the folding screen assembly are arranged to form an accommodating space, and the accommodating space is used for accommodating the components of the electronic device.

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