Cover plate, preparation method of cover plate, display panel and display device

Abstract

The invention relates to the technical field of display, in particular to a cover plate, a preparation method of the cover plate, a display panel and a display device. The cover plate comprises a first cover plate assembly and a second cover plate assembly which are arranged in a stacked mode. The first cover plate assembly comprises a first protective film and a first cover plate located on the side, close to the second cover plate assembly, of the first protective film. The second cover plate assembly comprises a second cover plate and a rubber material layer located on the side, close to the first cover plate assembly, of the second cover plate, and the rubber material layer is attached to the first cover plate; the first cover plate assembly further comprises a first blocking layer, and the first blocking layer and the first cover plate are arranged on the same layer. The first barrier layer and the first cover plate are arranged on the same layer; therefore, when the adhesive material layer is attached to the first cover plate, the first blocking layer can support the first protective film located on the side edge of the first cover plate, the first protective film can be prevented from making contact with and adhering to the adhesive material layer, and when the first protective film is torn off from the cover plate, the adhesive material layer can be prevented from being damaged, so that the performance of the cover plate is prevented from being damaged.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a cover plate, a method for preparing the cover plate, a display panel, and a display device. Background Art

[0002] The cover plate is one of the key components of the display panel. Its material and performance directly affect the service life of the display panel and the user experience. With the development of screen technology, the market demand for cover plates has become more diversified. Among them, the use of all-in-one cover plates can reduce the risk of cover plate damage, improve the durability of the display panel, and increase the life of the cover plate and display panel.

[0003] However, the performance of the current cover needs to be improved. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a cover plate, a method for preparing a cover plate, a display panel and a display device, aiming to improve the performance of the cover plate.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted in the first aspect of the embodiment of the present application is: a cover plate, including a first cover plate assembly and a second cover plate assembly which are stacked.

[0006] The first cover plate assembly includes a first protective film and a first cover plate located on the side of the first protective film close to the second cover plate assembly; the second cover plate assembly includes a second cover plate and a glue layer located on the side of the second cover plate close to the first cover plate assembly, and the glue layer is adhered to the first cover plate; the first cover plate assembly also includes a first barrier layer, and the first barrier layer is arranged on the same layer as the first cover plate.

[0007] The beneficial effect of the cover plate provided by the embodiment of the present application is that: since the first barrier layer is arranged on the same layer as the first cover plate, when the adhesive layer is attached to the first cover plate, the first barrier layer can support the first protective film located on the side of the first cover plate, and can prevent the first protective film from contacting and adhering to the adhesive layer. When the first protective film is torn off the cover plate, the adhesive layer can be prevented from being damaged, thereby preventing damage to the performance of the cover plate.

[0008] In some embodiments, the outer contour of the orthographic projection of the first protective film on the second cover plate coincides with the outer contour of the orthographic projection of the first barrier layer on the second cover plate, or the outer contour of the orthographic projection of the first protective film on the second cover plate is located within the outer contour of the orthographic projection of the first barrier layer on the second cover plate;

[0009] Preferably, the first barrier layer is disposed around the circumference of the first cover plate.

[0010] In some embodiments, the first barrier layer is bonded to the adhesive layer and the first protective film respectively, and the adhesion between the first barrier layer and the adhesive layer is smaller than the adhesion between the first barrier layer and the first protective film.

[0011] In some embodiments, the second cover plate assembly further includes a second protective film, and the second protective film is disposed on a surface of the second cover plate facing away from the adhesive layer.

[0012] To achieve the above-mentioned purpose, the technical solution adopted in the second embodiment of the present application is: a method for preparing a cover plate, comprising:

[0013] A first barrier layer and a first cover plate are arranged on the first protective film; preferably, the first barrier layer is hollowed out in the middle, and the first cover plate is arranged at the hollowed out portion of the first barrier layer;

[0014] The adhesive layer on the second cover plate assembly is attached to the surface of the first cover plate facing away from the first protective film, and the adhesive layer covers the first barrier layer.

[0015] The beneficial effect of the method for preparing the cover plate provided in the embodiment of the present application is that before the adhesive layer is attached to the first cover plate, a first barrier layer is first arranged on the first protective film, which can prevent the adhesive layer from contacting and adhering to the first protective film. When the first protective film is torn off the cover plate, the adhesive layer can be prevented from being damaged, thereby preventing damage to the performance of the cover plate.

[0016] In some embodiments, the step of providing a first barrier layer and a first cover plate on the first protective film includes:

[0017] attaching the first barrier layer to the first protective film;

[0018] The first cover plate is attached to the first protective film, and the first cover plate is disposed on one side of the first barrier layer.

[0019] In some embodiments, the method for preparing the cover plate further includes:

[0020] disposing a second barrier layer on the first barrier layer;

[0021] Cleaning the surface of the first cover plate away from the first protective film;

[0022] The second barrier layer is removed from the first barrier layer.

[0023] In some embodiments, the second cover plate assembly further includes a second cover plate and a second protective film, and the second cover plate is disposed between the glue layer and the second protective film.

[0024] To achieve the above-mentioned purpose, the technical solution adopted in the third aspect embodiment of the present application is: a display panel, characterized in that it includes a cover plate prepared by the preparation method of the cover plate of the above-mentioned first aspect embodiment or the cover plate of the above-mentioned second aspect embodiment.

[0025] The beneficial effect of the display panel provided by the embodiment of the present application is that by applying the cover plate of the first embodiment or the cover plate prepared by the second embodiment to the display panel, the performance of the display panel is improved.

[0026] In order to achieve the above-mentioned purpose, the technical solution adopted in the fourth embodiment of the present application is: a display device, characterized in that it includes the display panel of the above-mentioned third embodiment.

[0027] The display device provided by the embodiment of the present application has the beneficial effect of: by applying the display panel of the above-mentioned third aspect embodiment to the display device, it helps to improve the performance of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 is a schematic structural diagram of a cover plate in one of the embodiments of the present application;

[0030] Figure 2 yes Figure 1 A cross-sectional view of the cover plate shown along the AA direction;

[0031] Figure 3 yes Figure 1 A schematic structural diagram of a first cover plate assembly in the cover plate shown;

[0032] Figure 4 is a flow chart of a method for preparing a cover plate in one of the embodiments of the present application;

[0033] Figure 5 yes Figure 4 The flowchart of step S100 in the flowchart shown;

[0034] Figure 6 is a process diagram of attaching a first cover plate to a first protective film in step S100 of a method for preparing a cover plate in one embodiment of the present application;

[0035] Figure 7It is a process diagram of step S300, step S400 and step S500 in the method for preparing a cover plate in one of the embodiments of the present application.

[0036] Reference numerals:

[0037] 1. first cover plate assembly; 11. first protective film; 12. first cover plate; 13. first barrier layer; 14. second barrier layer;

[0038] 2. second cover plate assembly; 21. adhesive layer; 22. second cover plate; 23. second protective film;

[0039] 3. The first intermediate protective film; 4. The second intermediate protective film. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] References to "one embodiment", "some embodiments" or "an embodiment" described in the specification of this application mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some other embodiments", "in some other embodiments", etc., which appear at different places in this specification, do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. In addition, in one or more embodiments, particular features, structures or characteristics may be combined in any suitable manner.

[0044] When making a display panel, in order to better reduce the border of the display panel, the cover plate will be attached to the display module first, and then the cover plate and the display module will be cut as one. Among them, the cover plate is one of the key components of the display panel, and its material and performance directly affect the service life of the display panel and user experience. With the development of screen technology, the market demand for cover plates has become more diversified. Among them, the use of an all-in-one cover plate can reduce the risk of cover plate damage, improve the durability of the display panel, and increase the life of the cover plate and display panel.

[0045] In the related art, the multi-in-one cover includes multiple cover plates, at least one of which is a flexible cover plate; at least one of which is a rigid cover plate. Since the multi-in-one cover includes a rigid cover plate, and the rigid cover plate is easily damaged during cutting, the rigid cover plate in the multi-in-one cover is designed to be inwardly shrunk to prevent the rigid cover plate from being damaged during cutting.

[0046] Take the multi-in-one cover plate as an example, in which one of the cover plates is the first cover plate, and the other cover plate is the second cover plate. The first cover plate and the second cover plate are bonded by a glue layer. The first cover plate is a rigid cover plate, and the second cover plate is a flexible cover plate. The first cover plate is designed to be retracted. In order to protect the first cover plate and the second cover plate, the multi-in-one cover plate is also provided with a first protective film that fits the first cover plate and a second protective film that fits the second cover plate. Due to the retracted design of the first cover plate, the glue layer on one side of the first cover plate will adhere to the first protective film on the other side of the first cover plate. When the first protective film is torn off, the glue layer will be pulled, causing the glue layer to be damaged, thereby reducing the viscosity of the glue layer. Therefore, when the multi-in-one cover plate is attached to the display module, the adhesion between the multi-in-one cover plate and the display module will be low, which reduces the durability of the display panel and shortens the life of the display panel.

[0047] In view of the above problems, the embodiments of the present application provide a cover plate and a method for preparing the cover plate, aiming to solve the technical problem of the adhesive layer expanding outward and adhering to the first cover plate and the first protective film, so as to improve the performance of the cover plate.

[0048] In order to illustrate the technical solution of the present application, a description is given below with reference to specific drawings and embodiments.

[0049] Please refer to Figure 1 and Figure 2 An embodiment of the present application provides a cover plate including a first cover plate assembly 1 and a second cover plate assembly 2 which are stacked.

[0050] The first cover plate assembly 1 includes a first protective film 11 and a first cover plate 12 located on the side of the first protective film 11 close to the second cover plate assembly 2; the second cover plate assembly 2 includes a second cover plate 22 and a glue layer 21 located on the side of the second cover plate 22 close to the first cover plate assembly 1, and the glue layer 21 is adhered to the first cover plate 12; the first cover plate assembly 1 also includes a first barrier layer 13, and the first barrier layer 13 is arranged on the same layer as the first cover plate 12.

[0051] The second cover plate 22 is a flexible cover plate, and the material of the second cover plate 22 can be at least one of flexible materials such as polyimide, polyethylene terephthalate, and polyethylene naphthalate.

[0052] The material of the adhesive layer 21 can be but is not limited to optically clear adhesive (OCA), optically clear resin (OCR), polyvinyl butyral (PVB), polyurethane (PU), silicone, acrylic adhesive, thermoplastic polyurethane (TPU), etc.

[0053] The first protective film 11 is mainly used to protect the surface of the first cover plate 12 from scratches, dust, fingerprints and other contamination or damage during the storage and transportation of the cover plate. The first protective film 11 needs to have certain transparency, adhesion, scratch resistance and easy peelability. The first protective film 11 can be but is not limited to a polyethylene (PE, Polyethylene) protective film, a polypropylene (PP, Polypropylene) protective film, a polyethylene terephthalate (PET, Polyethylene Terephthalate) protective film, a polyvinyl chloride (PVC, Polyvinyl Chloride) protective film, a polyurethane (PU, Polyurethane) protective film, a silicone protective film, an antistatic protective film, and an anti-glare (AG, Anti-Glare) protective film.

[0054] The first protective film 11 has a certain adhesive force, that is, the first protective film 11 includes a sticky surface, and the first cover plate 12 and the first barrier layer 13 are both arranged on the sticky surface of the first protective film 11, so that the first cover plate 12 and the first barrier layer 13 can be fixed on the first protective film 11.

[0055] It should be noted that the first protective film 11 has good flexibility, so that the first protective film 11 is easy to fit the first cover plate 12 .

[0056] The first cover plate 12 is a rigid cover plate, and the material of the first cover plate 12 can be at least one of hard materials such as tempered glass, polycarbonate, and polymethyl methacrylate.

[0057] The first cover plate 12 is set inwardly relative to the first protective film 11 and the adhesive layer 21, so that the first protective film 11 located on the peripheral side of the first cover plate 12 and the adhesive layer 21 located on the peripheral side of the first cover plate 12 are arranged opposite to each other. Since the first protective film 11 has good flexibility, the first protective film 11 arranged opposite to the first cover plate 12 is easy to bend in the direction close to the first cover plate 12, so that the first protective film 11 contacts and adheres to the first cover plate 12. The first barrier layer 13 and the first cover plate 12 are arranged on the same surface of the first protective film 11, so that the first barrier layer 13 is located between the first protective film 11 and the adhesive layer 21 that are arranged opposite to each other. The first barrier layer 13 can support the first protective film 11 to improve the strength of the first protective film 11, and can reduce the probability of bending and deformation of the first protective film 11 to prevent the first protective film 11 and the adhesive layer 21 from contacting and adhering to each other.

[0058] The surface of the first barrier layer 13 facing away from the first protective film 11 is treated so that the first barrier layer 13 is not easily adhered to the adhesive layer 21. The surface of the first barrier layer 13 facing away from the first protective film 11 is treated, which may refer to: silicone oil treatment, fluorination treatment, plasma treatment, wax treatment, etc. are performed on one of the surfaces of the first barrier layer 13, so that a layer of anti-sticking film or anti-sticking coating is formed on one of the surfaces of the first barrier layer 13; or. A layer of anti-sticking film or anti-sticking coating is formed on one of the surfaces of the first barrier layer 13 by chemical vapor deposition, electrochemical treatment, sol-gel method, etc. In the embodiment of the present application, the surface of the first barrier layer 13 facing away from the anti-sticking film or the anti-sticking coating is adhered to the first protective film 11, and the anti-sticking film or the anti-sticking coating on the first barrier layer 13 contacts the adhesive layer 21, so that the adhesion between the first barrier layer 13 and the adhesive layer 21 is low. When the first barrier layer 13 is subsequently torn off from the adhesive layer 21, the adhesive layer 21 will not be damaged, thereby not affecting the adhesion of the adhesive layer 21.

[0059] In the cover plate of the embodiment of the present application, since the first barrier layer 13 and the first cover plate 12 are arranged in the same layer, when the adhesive layer 21 is attached to the first cover plate 12, the first barrier layer 13 can support the first protective film 11 located on the side of the first cover plate 12, and can prevent the first protective film 11 from contacting and adhering to the adhesive layer 21. When the first protective film 11 is torn off the cover plate, the adhesive layer 21 can be prevented from being damaged, so as to prevent damage to the performance of the cover plate.

[0060] Please refer to Figure 2 and Figure 3In some embodiments, the outer contour of the orthographic projection of the first protective film 11 on the second cover plate 22 coincides with the outer contour of the orthographic projection of the first barrier layer 13 on the second cover plate 22, or the outer contour of the orthographic projection of the first protective film 11 on the second cover plate 22 is located within the outer contour of the orthographic projection of the first barrier layer 13 on the second cover plate 22.

[0061] Through the above arrangement, the edge of the first barrier layer 13 is flush with the edge of the first protective film 11, or the edge of the first barrier layer 13 protrudes from the edge of the first protective film 11, so that the first barrier layer 13 can completely cover the first protective film 11 located on the peripheral side of the first cover plate 12, so as to improve the effect of the first barrier layer 13 isolating the first protective film 11 and the adhesive layer 21, thereby preventing the first protective film 11 from contacting the adhesive layer 21.

[0062] Please refer to Figure 3 Preferably, the first barrier layer 13 is disposed around the first cover plate 12 .

[0063] Please refer to Figure 3 In the above embodiment, the first barrier layer 13 is hollowed out in the middle, the first cover plate 12 is arranged at the hollowed out portion of the first barrier layer 13 , and the first cover plate 12 is spaced apart from the first barrier layer 13 .

[0064] In the above embodiment, the first cover plate 12 is spaced apart from the first barrier layer 13 . When the first barrier layer 13 is torn off, the first cover plate 12 will not block the movement of the first barrier layer 13 , so that the first barrier layer 13 can be easily torn off.

[0065] Please refer to Figure 1 In some embodiments, the outer contour of the orthographic projection of the adhesive layer 21 on the second cover plate 22 coincides with the outer contour of the orthographic projection of the first barrier layer 13 on the second cover plate 22, or the outer contour of the orthographic projection of the adhesive layer 21 on the second cover plate 22 is located within the outer contour of the orthographic projection of the first barrier layer 13 on the second cover plate 22.

[0066] Through the above configuration, the edge of the first barrier layer 13 is flush with the edge of the adhesive layer 21, or the edge of the first barrier layer 13 protrudes from the edge of the adhesive layer 21, so that the first barrier layer 13 can completely cover the adhesive layer 21 located on the peripheral side of the first cover plate 12 to prevent the first protective film 11 from contacting the adhesive layer 21.

[0067] In some embodiments, the first protective film 11 has adhesiveness.

[0068] In the above embodiment, the first protective film 11 has a certain adhesive force, that is, the first protective film 11 includes an adhesive surface, and the first cover plate 12 and the first barrier layer 13 are both arranged on the adhesive surface of the first protective film 11. Therefore, the first cover plate 12 and the first barrier layer 13 can be fixed on the first protective film 11.

[0069] In some embodiments, the first barrier layer 13 is bonded to the adhesive layer 21 and the first protective film 11 respectively, and the adhesion between the first barrier layer 13 and the adhesive layer 21 is smaller than the adhesion between the first barrier layer 13 and the first protective film 11 .

[0070] In the above embodiment, since the adhesion between the first barrier layer 13 and the adhesive layer 21 is less than the adhesion between the first barrier layer 13 and the first protective film 11, when the first protective film 11 is torn off, the first barrier layer 13 is easily torn off from the adhesive layer 21 along with the first protective film 11, and there is no need to repeatedly tear off the film, so as to facilitate the peeling of the first barrier layer 13, thereby simplifying the operation steps.

[0071] In the above embodiment, the first barrier layer 13 has a certain degree of viscosity, and the surface of the first barrier layer 13 facing away from the first protective film 11 is processed so that an anti-sticking film or an anti-sticking coating is formed on the first barrier layer 13, so that the first barrier layer 13 is not easy to adhere to the adhesive layer 21. And the surface of the first barrier layer 13 close to the first protective film 11 still has a certain degree of viscosity, so that the viscosity between the first barrier layer 13 and the first protective film 11 is greater than the viscosity between the first barrier layer 13 and the adhesive layer 21.

[0072] Please refer to Figure 1 and Figure 2 In some embodiments, the second cover plate assembly 2 further includes a second protective film 23 , and the second protective film 23 is disposed on a surface of the second cover plate 22 facing away from the adhesive layer 21 .

[0073] The second protective film 23 is mainly used to protect the surface of the second cover plate 22 from scratches, dust, fingerprints and other contamination or damage during production, transportation and installation. The second protective film 23 needs to have certain transparency, adhesion, scratch resistance and easy peelability. The second protective film 23 can be but is not limited to a polyethylene (PE, Polyethylene) protective film, a polypropylene (PP, Polypropylene) protective film, a polyethylene terephthalate (PET, Polyethylene Terephthalate) protective film, a polyvinyl chloride (PVC, Polyvinyl Chloride) protective film, a polyurethane (PU, Polyurethane) protective film, a silicone protective film, an antistatic protective film, and an anti-glare (AG, Anti-Glare) protective film.

[0074] The second protective film 23 has a certain adhesive force, that is, the second protective film 23 includes a sticky surface, and the sticky surface of the second protective film 23 is attached to the surface of the second cover plate 22 away from the adhesive layer 21 .

[0075] It should be noted that the second protective film 23 has good flexibility, so that the second protective film 23 can be easily attached to the second cover plate 22 .

[0076] Please refer to Figure 1 and Figure 2 In some embodiments, the outer contour of the orthographic projection of the second protective film 23 on the first protective film 11 coincides with the outer contour of the orthographic projection of the second cover plate 22 on the first protective film 11. That is, the edge of the second protective film 23 is flush with the edge of the second cover plate 22.

[0077] Through the above configuration, the second protective film 23 can completely cover the surface of the second cover plate 22 away from the adhesive layer 21 , so that the second protective film 23 can fully protect the second cover plate 22 .

[0078] Please refer to Figure 4 The technical solution adopted in the second embodiment of the present application is: a method for preparing a cover plate, comprising:

[0079] S100 : disposing a first barrier layer 13 and a first cover plate 12 on the first protective film 11 .

[0080] S500 : The adhesive layer 21 on the second cover plate assembly 2 is attached to the surface of the first cover plate 12 facing away from the first protective film 11 , and the adhesive layer 21 covers the first barrier layer 13 .

[0081] The first protective film 11 has a certain adhesion force, that is, the first protective film 11 includes a sticky surface. Step S100: arranging the first barrier layer 13 and the first cover plate 12 on the first protective film 11 means attaching the first barrier layer 13 and the first cover plate 12 on the sticky surface of the first protective film 11, so that the first cover plate 12 and the first barrier layer 13 can be fixed on the first protective film 11, and the first cover plate 12 and the first barrier layer 13 are both arranged on the sticky surface of the first protective film 11.

[0082] Please refer to Figure 3 Preferably, the first barrier layer 13 is hollowed out in the middle, and the first cover plate 12 is arranged at the hollowed out portion of the first barrier layer 13 .

[0083] The surface of the first barrier layer 13 facing away from the first protective film 11 is treated so that the first barrier layer 13 is not easily adhered to the adhesive layer 21. The surface of the first barrier layer 13 facing away from the first protective film 11 is treated, which may refer to: silicone oil treatment, fluorination treatment, plasma treatment, wax treatment, etc. are performed on one of the surfaces of the first barrier layer 13, so that a layer of anti-sticking film or anti-sticking coating is formed on one of the surfaces of the first barrier layer 13; or. A layer of anti-sticking film or anti-sticking coating is formed on one of the surfaces of the first barrier layer 13 by chemical vapor deposition, electrochemical treatment, sol-gel method, etc. In the embodiment of the present application, the surface of the first barrier layer 13 facing away from the anti-sticking film or the anti-sticking coating is adhered to the first protective film 11, and the anti-sticking film or the anti-sticking coating on the first barrier layer 13 contacts the adhesive layer 21, so that the adhesion between the first barrier layer 13 and the adhesive layer 21 is low. When the first barrier layer 13 is subsequently torn off from the adhesive layer 21, the adhesive layer 21 will not be damaged, thereby not affecting the adhesion of the adhesive layer 21.

[0084] Before the adhesive layer 21 is attached to the first cover plate 12, a first barrier layer 13 is first provided on the first protective film 11 to prevent the adhesive layer 21 from contacting and adhering to the first protective film 11. When the first protective film 11 is torn off from the cover plate, the adhesive layer 21 can be prevented from being damaged, thereby preventing the performance of the cover plate from being damaged.

[0085] Please refer to Figure 5 In some embodiments, a first barrier layer 13 and a first cover plate 12 are provided on the first protective film 11, including:

[0086] S110 : attaching the first barrier layer 13 to the first protective film 11 .

[0087] S120 : attaching the first cover plate 12 to the first protective film 11 , and disposing the first cover plate 12 on one side of the first barrier layer 13 .

[0088] Please refer to Figure 6 It should be noted that the first cover plate 12 is a plate-shaped structure, and has two surfaces arranged opposite to each other, one of which is attached with a first intermediate protective film 3, and the other is attached with a second intermediate protective film 4. The first intermediate protective film 3 and the second intermediate protective film 4 are mainly used to protect the surface of the first cover plate 12 from being contaminated or damaged by scratches, dust, fingerprints, etc. during storage, production and transportation.

[0089] The process of attaching the first cover plate 12 to the first protective film 11 is as follows: first, the first intermediate protective film 3 is torn off from the first cover plate 12; then, the first cover plate 12 is attached to the adhesive surface of the first protective film 11, and the second intermediate protective film 4 is retained on the first cover plate 12 to protect the surface of the first cover plate 12 facing away from the first protective film 11 from being contaminated or damaged by scratches, dust, fingerprints, etc. during the process of the first cover plate 12 being attached to the adhesive surface of the first protective film 11; and the second intermediate protective film 4 is torn off from the first cover plate 12 before the surface of the adhesive layer 21 facing away from the second cover plate 22 is attached to the first cover plate 12.

[0090] In the above steps, before attaching the first cover plate 12 to the sticky surface of the first protective film 11, the first barrier layer 13 is first attached to the sticky surface of the first protective film 11, so that the first barrier layer 13 can isolate the sticky surface of the first protective film 11 and the second intermediate protective film 4, and can prevent the second intermediate protective film 4 from contacting and adhering to the first protective film 11. When the second intermediate protective film 4 is torn off from the first cover plate 12, it can prevent the sticky surface of the first protective film 11 from being damaged, so that the first protective film 11 is not easily detached from the first cover plate 12.

[0091] Please refer to Figure 4 and Figure 7 In some embodiments, the method for preparing the cover plate further comprises:

[0092] S200 : disposing a second barrier layer 14 on the first barrier layer 13 .

[0093] S300 : Cleaning the surface of the first cover plate 12 facing away from the first protective film 11 .

[0094] S400 : removing the second barrier layer 14 from the first barrier layer 13 .

[0095] Cleaning the surface of the first cover plate 12 away from the first protective film 11 can improve the adhesion of the surface of the first cover plate 12 away from the first protective film 11 , so as to improve the adhesion between the adhesive layer 21 and the first cover plate 12 .

[0096] The method for cleaning the surface of the first cover plate 12 away from the first protective film 11 may be, but is not limited to, plasma surface cleaning, wet cleaning method, and the like.

[0097] It should be noted that after cleaning the surface of the first cover plate 12 away from the first protective film 11, the layer of the second barrier layer 14 away from the first protective film 11 will be destroyed, thereby improving the adhesion of the second barrier layer 14 away from the first protective film 11. In this embodiment, by providing two barrier layers, when cleaning the surface of the first cover plate 12 away from the first protective film 11, the second barrier layer 14 can protect the first barrier layer 13 to prevent the layer of the first barrier layer 13 away from the first protective film 11 from being destroyed. After removing the second barrier layer 14, the surface of the first barrier layer 13 away from the first protective film 11 is still not easy to adhere to the adhesive layer 21.

[0098] Preferably, the second barrier layer 14 is disposed on the first barrier layer 13 before the first cover plate 12 is disposed on the first protective film 11. For example, the first barrier layer 13 and the second barrier layer 14 are combined first, and then the first barrier layer 13 and the second barrier layer 14 are disposed on the first protective film 11 together, which can reduce the difficulty of alignment.

[0099] In the above embodiment, the surface of the second barrier layer 14 facing away from the first protective film 11 is also treated so that the second barrier layer 14 is not easily adhered to the second intermediate protective film 4, and the second barrier layer 14 can be prevented from being torn off together with the second intermediate protective film 4 when the second intermediate protective film 4 is torn off from the first cover plate 12.

[0100] Please refer to Figure 2 In some embodiments, the second cover plate assembly 2 further includes a second cover plate 22 and a second protective film 23 , and the second cover plate 22 is disposed between the adhesive layer 21 and the second protective film 23 .

[0101] In the above embodiment, the second protective film 23 can cover the surface of the second cover plate 22 facing away from the adhesive layer 21 , so that the second protective film 23 can protect the second cover plate 22 .

[0102] The second protective film 23 is mainly used to protect the surface of the second cover plate 22 from scratches, dust, fingerprints and other contamination or damage during production, transportation and installation. The second protective film 23 needs to have certain transparency, adhesion, scratch resistance and easy peelability. The second protective film 23 can be but is not limited to a polyethylene (PE, Polyethylene) protective film, a polypropylene (PP, Polypropylene) protective film, a polyethylene terephthalate (PET, Polyethylene Terephthalate) protective film, a polyvinyl chloride (PVC, Polyvinyl Chloride) protective film, a polyurethane (PU, Polyurethane) protective film, a silicone protective film, an antistatic protective film, and an anti-glare (AG, Anti-Glare) protective film.

[0103] The second protective film 23 has a certain adhesive force, that is, the second protective film 23 includes a sticky surface, and the sticky surface of the second protective film 23 is attached to the surface of the second cover plate 22 away from the adhesive layer 21 .

[0104] It should be noted that the second protective film 23 has good flexibility, so that the second protective film 23 can be easily attached to the second cover plate 22 .

[0105] A third aspect of the present application provides a display panel, characterized in that it includes a cover plate prepared by the method for preparing the cover plate of the first aspect embodiment or the cover plate of the second aspect embodiment.

[0106] By applying the cover plate of the first embodiment or the cover plate prepared by the second embodiment to a display panel, the performance of the display panel is improved.

[0107] A fourth aspect of the present application provides a display device, comprising a display panel according to the third aspect.

[0108] By applying the display panel of the third embodiment described above to a display device, the performance of the display device is improved.

[0109] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A cover plate, characterized in that: comprising a first cover plate assembly and a second cover plate assembly which are stacked, The first cover plate assembly includes a first protective film and a first cover plate located on a side of the first protective film close to the second cover plate assembly; The second cover plate assembly includes a second cover plate and a glue layer located on a side of the second cover plate close to the first cover plate assembly, wherein the glue layer is attached to the first cover plate; The first cover plate assembly further includes a first barrier layer, and the first barrier layer is disposed on the same layer as the first cover plate.

2. The cover plate according to claim 1, characterized in that: The outer contour of the orthographic projection of the first protective film on the second cover plate coincides with the outer contour of the orthographic projection of the first barrier layer on the second cover plate, or the outer contour of the orthographic projection of the first protective film on the second cover plate is located within the outer contour of the orthographic projection of the first barrier layer on the second cover plate; Preferably, the first barrier layer is disposed around the circumference of the first cover plate.

3. The cover plate according to claim 1, characterized in that: The first barrier layer is bonded to the adhesive layer and the first protective film respectively, and the adhesion between the first barrier layer and the adhesive layer is smaller than the adhesion between the first barrier layer and the first protective film.

4. The cover plate according to any one of claims 1 to 4, characterized in that: The second cover plate assembly further includes a second protective film, and the second protective film is disposed on a surface of the second cover plate facing away from the adhesive layer.

5. A method for preparing a cover plate, characterized in that: include: Disposing a first barrier layer and a first cover plate on the first protective film; The adhesive layer on the second cover plate assembly is attached to the surface of the first cover plate facing away from the first protective film, and the adhesive layer covers the first barrier layer.

6. The method for preparing the cover plate according to claim 5, characterized in that: The method of providing a first barrier layer and a first cover plate on the first protective film comprises: attaching the first barrier layer to the first protective film; The first cover plate is attached to the first protective film, and the first cover plate is disposed on one side of the first barrier layer.

7. The method for preparing the cover plate according to claim 5 or 6, characterized in that: The method for preparing the cover plate further includes: disposing a second barrier layer on the first barrier layer; Cleaning the surface of the first cover plate away from the first protective film; The second barrier layer is removed from the first barrier layer.

8. The method for preparing the cover plate according to claim 5, characterized in that: The second cover plate assembly further includes a second cover plate and a second protective film, wherein the second cover plate is disposed between the adhesive layer and the second protective film; And / or, the first barrier layer is hollowed out in the middle, and the first cover plate is arranged at the hollowed out portion of the first barrier layer.

9. A display panel, characterized in that: A cover plate comprising the cover plate described in any one of claims 1 to 4 or a cover plate prepared by the method for preparing the cover plate described in any one of claims 5 to 8.

10. A display device, characterized in that: Comprising the display panel as claimed in claim 9.

Images