WO2024067056A1

WO2024067056A1 - Flexible screen and preparation method therefor, and electronic device

Info

Publication number: WO2024067056A1
Application number: PCT/CN2023/118163
Authority: WO
Inventors: 刘国和; 李夏; 贺虎
Original assignee: 华为技术有限公司
Priority date: 2022-09-27
Filing date: 2023-09-12
Publication date: 2024-04-04
Also published as: CN115605040A

Abstract

Provided in the embodiments of the present application are a flexible screen and a preparation method therefor, and an electronic device. In a horizontal direction, the flexible screen comprises a first main-body region, a second main-body region, and a bending region, which is connected between the first main-body region and the second main-body region. In a thickness direction, the flexible screen comprises a backplane and a touch-control layer, which are arranged in a stacked manner, wherein the backplane and/or the touch-control layer comprises a flexible laminated layer. The flexible laminated layer comprises a first organic filling layer and a first organic layer, which are arranged in a stacked manner, wherein the first organic filling layer comprises a first inorganic matrix and one or more organic fillers, with one or more openings being distributed in the first inorganic matrix, and one or more organic fillers being respectively provided in the one or more openings in a matching manner. Accordingly, since an organic material has relatively good deformation resistance, inorganic removal and organic filling are performed on an inorganic layer in a flexible screen, and the area ratio of the inorganic layer is reduced, such that the deformation resistance of the flexible screen can be significantly improved, thereby improving the reliability of the flexible screen.

Description

Flexible screen and preparation method thereof, and electronic device

This application is required to be submitted to the China Patent Office on September 27, 2022, with application number 202211182807.2 and application name

The priority of the Chinese patent application for "Flexible screen and its preparation method, electronic device" is incorporated by reference in its entirety into this application.

Technical Field

The embodiments of the present application relate to the field of materials, and in particular, to a flexible screen and a method for preparing the same, and an electronic device.

Background technique

Flexible screens in electronic devices are flexible and bendable, and can provide a good folding experience. However, the existing flexible screens have poor deformation resistance. During the bending process, stress and deformation of different degrees will be generated in each film layer. When the stress and deformation generated exceed the failure threshold, it is easy to cause the flexible screen to crack or break, resulting in abnormal display of the flexible screen, such as broken bright spots, black spots and other display defects, and the reliability of the flexible screen is reduced.

Summary of the invention

The embodiments of the present application provide a flexible screen and a method for preparing the same, and an electronic device. The flexible screen has excellent anti-deformation performance, which is beneficial to improving the reliability of the flexible screen.

In a first aspect, a flexible screen is provided, which comprises in a horizontal direction: a first main body area, a bending area and a second main body area, wherein the bending area is connected between the first main body area and the second main body area, and the flexible screen comprises in a thickness direction: a stacked back panel and a touch layer, wherein the back panel comprises a flexible stack, and/or the touch layer comprises the flexible stack, and the flexible stack comprises: a stacked first organic filling layer and a first organic layer, wherein the first organic filling layer comprises a first inorganic matrix and one or more organic fillers, wherein the first inorganic matrix is provided with one or more openings, and the one or more organic fillers are respectively located in the one or more openings and match the one or more openings.

Optionally, the organic filler is composed of one or more of polyimide resin, siloxane resin, and acrylic resin.

Optionally, the one or more openings are in the shape of one or more of a cylinder, a truncated cone, a cuboid, a prism, and an elliptical cylinder.

Optionally, the one or more openings have a depth of 0.2 micrometers to 5 micrometers.

Optionally, the upper pore diameter of the one or more openings is greater than or equal to 2 microns.

Optionally, the upper pore diameter of the one or more openings is 3 microns to 5 microns.

Optionally, the hole depth or hole diameter of the one or more openings are not completely the same, and the hole diameter includes the upper hole diameter and the lower hole diameter.

In the embodiments of the present application, since the deformation resistance of organic materials is significantly better than that of inorganic materials, the area ratio of the inorganic layer can be reduced by partially or entirely removing the inorganic layer in the flexible screen and filling the inorganic layer removal area with organic materials and organic filling, thereby significantly improving the deformation resistance of the flexible screen and improving the reliability of the flexible screen.

In combination with the first aspect, in certain implementations of the first aspect, a distribution area of the one or more openings corresponds to a bending area of the flexible screen.

In the embodiments of the present application, since the bending area of the flexible screen (for example, the flexible screen is a foldable screen) will be subjected to relatively large deformation stress during the bending process, and the inorganic material has poor deformation resistance, it is very likely that the deformation stress exerted on the inorganic layer in the flexible screen will exceed its failure threshold first and cause cracks. The present application scheme makes full use of the better deformation resistance and larger deformation failure threshold of the organic layer, inorganically removes the inorganic layer in the bending area of the flexible screen, and performs organic filling at the position of the inorganic removal, which can significantly improve the bending resistance of the bending area of the flexible screen, thereby improving the reliability of the flexible screen.

In combination with the first aspect, in certain implementations of the first aspect, a distribution area of the one or more openings corresponds to a non-effective display area of the flexible screen.

In an embodiment of the present application, the inorganic removal area (organic filling area) is set in the non-effective display area of the flexible screen, so as to effectively avoid the influence of inorganic removal and organic filling on the display effect of the flexible screen.

In combination with the first aspect, in certain implementations of the first aspect, the non-effective display area of the flexible screen includes four corner areas of the flexible screen.

In the embodiments of the present application, since the inorganic layer in the flexible screen of the electronic device has poor deformation resistance, and the four corners of the flexible screen of the electronic device are prone to deformation stress concentration during the film layer bonding process, the inorganic layer of the flexible screen may be unable to withstand the large deformation stress and break, thereby causing the screen of the electronic device to be black, a black screen or touch failure and other poor display. The scheme of the embodiments of the present application is to remove the inorganic layer partially or entirely in the four corners of the flexible screen of the electronic device, and fill the inorganic layer removal area with organic material (with better deformation resistance), thereby reducing the area ratio of the inorganic layer, making full use of the better deformation resistance and larger deformation failure threshold of the organic layer, which can significantly improve the deformation resistance of the four corners, and then effectively improve the screen failure problem caused by the bonding of the four corners, and greatly improve the pass rate of the four corner bonding.

In combination with the first aspect, in some implementations of the first aspect, the non-effective display area of the flexible screen includes an edge area of the effective display area of the flexible screen.

In the embodiment of the present application, since the edge of the display module cannot be continuously narrowed due to space requirements such as the driving circuit, power line, signal line and cutting tolerance, and the inorganic layer in the flexible screen of the electronic device has poor deformation resistance, it is impossible to achieve a large degree of deformation, and thus cannot achieve a physical "0" border. The solution of the embodiment of the present application removes the inorganic layer partially or entirely within a certain range within the screen display area of the electronic device, and fills it with organic material (with better deformation resistance), thereby reducing the area ratio of the inorganic layer and significantly improving the deformation resistance of the screen of the electronic device, thereby enabling the flexible screen of the electronic device to be folded 180°, thereby achieving a physical "0" border.

In combination with the first aspect, in certain implementations of the first aspect, the one or more openings are located outside a pixel opening area of the flexible screen.

In an embodiment of the present application, the position of inorganic removal (organic filling) is set outside the pixel opening area of the flexible screen (that is, not overlapping in the thickness direction), so as to effectively avoid the influence of inorganic removal and organic filling on the display effect of the flexible screen.

In combination with the first aspect, in certain implementations of the first aspect, the flexible screen further includes a light-emitting layer and an encapsulation layer, the light-emitting layer is stacked between the touch layer and the encapsulation layer, and the encapsulation layer is stacked between the light-emitting layer and the back panel.

In combination with the first aspect, in certain implementations of the first aspect, the flexible stack also includes a second organic filling layer, which is stacked with the first organic filling layer, wherein the second organic filling layer includes a second inorganic matrix and one or more organic fillers, one or more openings are distributed on the second inorganic matrix, and the one or more organic fillers are respectively located in the one or more openings and match the one or more openings.

For the explanation of the one or more openings and the one or more organic fillers, please refer to the above explanation of the first organic filler, which will not be repeated here for the sake of brevity.

In the embodiment of the present application, multiple inorganic layers in the flexible screen can be inorganically removed and organically filled at the same time, which can further reduce the area ratio of the inorganic layer, thereby more significantly improving the deformation resistance of the flexible screen and further improving the reliability of the flexible screen.

In a second aspect, a method for preparing a flexible screen is provided, the method comprising: forming one or more openings on the target inorganic layer by inorganically removing the target inorganic layer to obtain an inorganic matrix; coating an organic material on the inorganic matrix so that the organic material fills the one or more openings to obtain a flexible laminate; and disposing the flexible laminate in the back panel of the flexible screen and/or the touch layer of the flexible screen.

Optionally, inorganic removal of the target inorganic layer may be performed by using an etching gas, wherein the etching gas includes one or more of NF3, CF4, and CHF3.

Optionally, the organic material includes one or more of polyimide resin, siloxane resin, and acrylic resin.

Optionally, the hole depth or hole diameter of the one or more openings is not completely the same, and the hole diameter includes the upper hole diameter and the lower hole diameter.

In conjunction with the second aspect, in some implementations of the second aspect, the target inorganic layer includes a first inorganic layer, a second inorganic layer, and a third inorganic layer. Any one or more of the inorganic layers, the first inorganic layer is located in the back panel of the flexible screen, and the second inorganic layer and the third inorganic layer are located in the touch layer of the flexible screen.

In combination with the second aspect, in certain implementations of the second aspect, a distribution area of the one or more openings corresponds to a bending area of the flexible screen.

In combination with the second aspect, in certain implementations of the second aspect, a distribution area of the one or more openings corresponds to a non-effective display area of the flexible screen.

In combination with the second aspect, in certain implementations of the second aspect, the non-effective display area of the flexible screen includes four corner areas of the flexible screen.

In combination with the second aspect, in some implementations of the second aspect, the non-effective display area of the flexible screen includes an edge area of the effective display area of the flexible screen.

In combination with the second aspect, in certain implementations of the second aspect, the one or more openings are located outside a pixel opening area of the flexible screen.

In a third aspect, an electronic device is provided, comprising a flexible screen and a shell assembly as described in the first aspect or any possible implementation of the first aspect, wherein the flexible screen is connected to the shell assembly.

Optionally, the electronic device is a foldable electronic device.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a foldable electronic device provided in an embodiment of the present application.

FIG. 2 is a schematic structural diagram of a foldable electronic device provided in an embodiment of the present application.

FIG3 is a partial cross-sectional view of a foldable electronic device provided in an embodiment of the present application.

FIG. 4 is a schematic diagram of the forces acting on a flexible screen during a bending process provided in an embodiment of the present application.

FIG. 5 is a schematic diagram of the front structural view of a flexible stack provided in an embodiment of the present application.

FIG. 6 is a schematic diagram of the front view structure of another flexible stack provided in an embodiment of the present application.

FIG. 7 is a schematic diagram of the front view structure of another flexible stack provided in an embodiment of the present application.

FIG8 is a schematic diagram of the main view structure of a flexible screen provided in an embodiment of the present application.

Figure 9 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

Figure 10 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

Figure 11 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

Figure 12 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

Figure 13 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

Figure 14 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

Figure 15 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

Figure 16 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

Figure 17 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

Figure 18 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

Figure 19 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

Figure 20 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

Figure 21 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

Figure 22 is a schematic diagram of the main view structure of another flexible screen provided in an embodiment of the present application.

FIG. 23 is a schematic diagram of an inorganic removal area provided in an embodiment of the present application.

FIG. 24 is a schematic diagram of another inorganic removal area provided in an embodiment of the present application.

Figure 25 is a schematic diagram of an inorganic removal area provided in an embodiment of the present application.

FIG. 26 is a schematic diagram of an inorganic removal area provided in an embodiment of the present application.

FIG. 27 is a schematic flow chart of a method for manufacturing a flexible laminate provided in an embodiment of the present application.

Figure 28 is a schematic flowchart of a method for manufacturing a flexible screen provided in an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "one", "a kind", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that the term "and/or" is used to describe the association relationship of associated objects, indicating that three relationships may exist; for example, A and/or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, wherein A and B can be singular or plural. The character "/" generally indicates that the objects associated before and after are in an "or" relationship.

The terms "first", "second", etc. that appear in this application are only used to distinguish different objects. "First" and "second" themselves do not limit the actual order or function of the objects they modify. Any embodiment or design described as "exemplary", "example", "for example", "optionally" or "in some implementations" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of these words is intended to present related concepts in a specific way.

References to "one embodiment" or "some embodiments" etc. described in this specification 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 embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

FIG1 is a schematic diagram of the structure of a foldable electronic device 100 provided in an embodiment of the present application. The foldable electronic device 100 may include, but is not limited to, a foldable mobile phone, a tablet computer, a laptop computer, a car computer, a foldable display device (such as a TV), a wearable device, an augmented reality (AR) device, a virtual reality (VR) device, an audio or video playback device, a personal digital assistant (PDA), etc. It can be understood that the foldable electronic device 100 may not be limited to the above-mentioned devices, but may include newly developed electronic devices. The embodiment of the present application does not impose any special restrictions on the specific product form of the foldable device 100. The embodiment shown in FIG1 is illustrated by taking a foldable mobile phone as an example.

1 , a foldable electronic device 100 may include a housing assembly 10 and a flexible screen 30. The housing assembly 10 may be The flexible screen 30 may also be referred to as a folding screen, and the flexible screen 30 may form a display surface of the foldable electronic device 100 for displaying information and providing an interactive interface for the user.

In addition, the foldable electronic device 100 may further include a hinge mechanism 20 , and the hinge mechanism 20 may be used to realize the folding and unfolding of the foldable electronic device 100 .

Exemplarily, the housing assembly 10 may include a first housing 11 and a second housing 12, and the hinge mechanism 20 may be disposed between the first housing 11 and the second housing 13. The hinge mechanism 20 may be a mechanism composed of a plurality of components, and the hinge mechanism 20 may generate a mechanism movement. The opposite sides of the hinge mechanism 20 are respectively connected to the first housing 11 and the second housing 12, so that the first housing 11 and the second housing 12 can achieve relative rotation, and the rotation axis direction of the hinge mechanism 20 may be exemplarily shown as the straight line A in FIG. 1 .

In some embodiments, the first shell 11 and the second shell 12 can serve as the outer shell of the foldable electronic device 100, that is, the first shell 11 and the second shell 12 can serve as the appearance parts of the foldable electronic device 100, that is, the parts exposed to the outside and directly observable by the user. In other embodiments, the foldable electronic device 100 may include an outer shell as an appearance part, and the first shell 11 and the second shell 12 can be installed in the outer shell as non-appearance parts (such as a middle frame). The first shell 11 and the second shell 12 are used to install and carry the flexible screen 30, and drive the flexible screen 30 to bend and unfold.

The pattern filled with dots in FIG1 can schematically represent the flexible screen 30. The flexible screen 30 is flexible and can be bent and unfolded. As shown in FIG1 , the flexible screen 30 may include a main body area 31 and a bending area 32, the main body area 31 may be located on one side of the bending area 32, d1 in FIG1 represents the width of the bending area 32, and the bending axis of the bending area 32 may be in the same direction as the rotation axis of the hinge mechanism 20, that is, the bending axis of the bending area 32 may be exemplarily shown as the straight line A in FIG1 .

Specifically, the flexible screen 30 may include two main body regions 31, and the bending region 32 may be connected between the two main body regions 31. In addition, the two main body regions 31 may be fixed to the first shell 11 and the second shell 12, respectively. The bending region 33 may not be connected to the first shell 11 and the second shell 12, so that the bending region 33 can be spaced apart from the hinge 20 in both the unfolded state and the bent state to avoid mutual interference.

The two main regions 31 will not or substantially will not deform during the opening and closing of the flexible screen 30, and can maintain the original straight state. The bending region 32 can be bent and unfolded to achieve the bending and unfolding of the flexible screen 30, so that the foldable electronic device 100 is in an unfolded or folded state.

The foldable electronic device 100 shown in FIG1 is currently in an unfolded state, in which the angle between the first housing 11 and the second housing 12 may be approximately 180°. The flexible screen 30 may be in the unfolded state shown in FIG1 .

FIG. 2 shows a possible folding state of the foldable electronic device 100. FIG. 2 shows an outward folding state of the foldable electronic device 100. The outward folding state shown in FIG. 2 can be, for example, a left-right outward folding state or an up-down outward folding state. The pattern filled with dots in FIG. 2 can schematically represent the flexible screen 30. As shown in the figure, in the folded state, the flexible screen 30 can be in a bent state shown in FIG. 2.

1 and 2 , when the foldable electronic device 100 is in the outward folded state, the first housing 11 and the second housing 13 can be close to each other, and the two main body regions 31 can be close to each other. The two main body regions 31 and the bending region 32 can form a housing region for accommodating the first housing 11, the second housing 12 and the hinge 20. In other words, the first housing 11, the second housing 12 and the hinge 30 can be accommodated in the interval space between the two main body regions 31.

In other embodiments, the foldable electronic device 100 may be in an inward folding state, and the inward folding state may be, for example, a left-right inward folding state or a top-bottom inward folding state. When the foldable electronic device 100 is in an inward folding state, the first shell 11 and the second shell 12 may be close to each other, and the two main body areas 31 may be close to each other. The first shell 11, the second shell 12 and the hinge 20 may form a housing area for accommodating the flexible screen 30. That is, the flexible screen 30 may be accommodated in the interval space between the first shell 11, the second shell 12 and the hinge 20.

FIG3 exemplarily shows a schematic structural diagram of the BB′ cross section of the flexible screen 30 shown in FIG1 .

As shown in FIG. 3 , the flexible screen 30 may include a back panel 34 , a light emitting layer 35 , an encapsulation layer 36 and a touch layer 37 which are stacked.

Among them, the back plate 34 can be located on the backlight side of the light-emitting layer 35, and is used to provide a driving circuit for the light-emitting layer 35 and to protect the light-emitting layer 35. The encapsulation layer 36 can be located on the light-emitting side of the light-emitting layer 35. The touch layer 37 can be located on the side of the encapsulation layer 36 away from the light-emitting layer 35, and is used to protect the encapsulation layer 36 and the light-emitting layer 35 and provide a user touch interface.

It should be noted that the light-emitting side may be understood as the side of the light-emitting layer 35 that can emit light, and the backlight side may be understood as the non-luminous side of the light-emitting layer 35 that is opposite to the light-emitting side.

In addition, the light emitting layer 35 and the touch layer 37 can be bent and unfolded, and both can have portions distributed in the two main regions 31 and the bending region 32 .

The light-emitting layer 35 can be, for example, a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light emitting diode or an active-matrix organic light emitting diode (AMOLED), a flexible light-emitting diode (FLED), a quantum dot light emitting diode (QLED), etc., and the embodiments of the present application are not limited to this.

In a possible example, the backplane 34 may include a substrate 341, a first inorganic layer 342, and a first organic layer 343, wherein the first inorganic layer 342 is an inorganic insulating layer in the backplane 34, for example, one or more of silicon nitride (SiNx), silicon oxide (SiOx), and silicon oxynitride (SiONx) may be used; the first organic layer 343 is an organic insulating layer or a flat layer in the backplane 34, and its main component is resin. Compared with the materials of the organic layer, these materials have poorer ability to resist deformation.

In some embodiments, in order to improve the bending resistance of the flexible screen, the following methods are mainly used: structural optimization by module stacking, such as cover or bracket; or increasing the thickness of each film layer in the back plate 34 or the touch layer 37; or optimizing the film quality of each film layer in the back plate 34 or the touch layer 37. Among them, the structural optimization methods such as Cover and Bracket are mainly to achieve the purpose of protecting the fragile layer (for example, the light-emitting layer 35) by adjusting the bending neutral layer of the entire flexible screen module, that is, by adjusting the Cover and Bracket structures, the fragile layer is close to the bending neutral layer, so as to achieve the purpose of reducing the stress or strain of the fragile layer when bending.

Among them, the optimization of the thickness and film quality of the back panel 34 or the touch layer 37 is mainly achieved by adjusting the thickness of the target film layer or the film deposition process to adjust the bending neutral layer or the target film layer strength to improve the bending resistance of the flexible screen. However, usually in the flexible screen 30, there are certain restrictions on the thickness of the touch layer 37, which makes it difficult to adjust the thickness of the target film layer or the film deposition process to improve the impact resistance and extrusion resistance of the touch layer 37.

Although the above method can improve the bending resistance of the flexible screen to a certain extent, it does not fundamentally change the bending resistance of the fragile layer. In practical applications, it will inevitably be limited by factors such as the thickness, process capabilities, material properties and cost of the flexible screen. It may also lead to the deterioration of the impact resistance and extrusion resistance of the flexible screen.

FIG. 4 exemplarily shows a schematic diagram of the forces acting on the flexible screen 30 during the bending process.

As shown in FIG. 4 , the flexible screen 30 is bent upward, and when the forces acting on both ends of the flexible screen 30 are the same, the deformation stress during the bending process is concentrated in the central axis direction of the flexible screen 30 .

Taking the film layers in the backplane 34 as an example, during the bending process, the first inorganic layer 342 and the first organic layer 343 will both be subjected to deformation stress caused by bending. However, since the organic polymer material in the first organic layer 343 is flexible, the deformation resistance is significantly better than that of the first inorganic layer 342, which makes the deformation stress of the first organic layer 343 significantly lower than that of the first inorganic layer 342 (the deformation stress concentrated in the C1 region is less than the deformation stress concentrated in the C2 region). Therefore, it is very likely that the deformation stress of the first inorganic layer 342 exceeds its failure threshold first and cracks are generated. Similarly, in the touch layer 37, the deformation stress of the second organic layer 373 is significantly lower than the deformation stress of the second inorganic layer 371 and the third inorganic layer 372. It is very likely that the deformation stress of the second inorganic layer 371 and the third inorganic layer 372 exceeds its failure threshold first and cracks are generated, which may cause the touch function of the flexible screen 30 to fail, and even display defects such as broken bright spots and black spots may occur.

In summary, since the first inorganic layer in the back panel 34 and the second inorganic layer and the third inorganic layer in the touch layer 37 have poor deformation resistance, they are easily cracked or broken during the bending process, resulting in failure of the flexible screen 30.

Based on the above problems, the embodiment of the present application provides a flexible laminate with excellent anti-deformation ability, which can be applied to the flexible screen 30 to improve the anti-deformation ability of the flexible screen 30. For example, the flexible laminate can be provided in the back plate 34, or in the touch panel 37, or in both the back plate 34 and the touch panel 37 to improve the anti-deformation ability of the flexible screen 30.

Optionally, the flexible laminate is applied to the non-effective display area of the flexible screen 30 .

It can be understood that the application scenarios of the above-mentioned flexible stack are only examples and are not limitations of the present application.

FIG. 5 is a schematic diagram of a front structural view of a flexible stack 500 provided in an embodiment of the present application.

As can be seen from Figure 5, the flexible stack 500 includes an organic layer 502 and an organic filling layer 501 in a stacked design (as shown in (c) in Figure 5), wherein the organic filling layer 501 is obtained by filling an opening 504 of an inorganic matrix 503 (as shown in (b) in Figure 5), wherein a plurality of openings 504 are distributed on the inorganic matrix 503, and the inorganic matrix 503 is obtained by opening holes in an inorganic layer 505 (as shown in (a) in Figure 5).

The embodiment of the present application does not limit the arrangement of the openings 504 on the inorganic substrate 503. For example, the openings 504 may be evenly distributed on the inorganic substrate 503 or unevenly distributed on the inorganic substrate 503. The present application does not limit this.

The embodiment of the present application does not limit the shape of the opening 504 on the inorganic substrate 503, and it can be, for example, a circular opening, a square opening, a diamond opening, etc.

The embodiment of the present application does not limit the size of the opening 504 on the inorganic substrate 503. In some examples, the upper pore diameter of the opening 504 may be greater than or equal to 2 microns, preferably greater than or equal to 3 microns, for example, 5 microns; in other examples, the pore depth of the opening 504 may be 0.2 microns to 5 microns, for example, 2 microns.

Optionally, the upper diameter and the lower diameter of the opening 504 may be the same or different; and the upper shape and the lower shape of the opening 504 may be the same or different.

The embodiment of the present application does not limit the distribution density of the openings 504 .

Optionally, when applied to the flexible screen 30, the opening position should avoid the pixel opening area.

When the flexible laminate 500 is applied to the flexible screen 30:

In a possible implementation, the organic layer 502 is the first organic layer 343 , and the organic filling layer 501 replaces the first inorganic layer 342 .

In a possible implementation, the organic layer 503 is the second organic layer 373 , and the organic filling layer 501 replaces the second inorganic layer 371 and the third inorganic layer 372 .

In a possible implementation, the organic layer 502 is the first organic layer 343 and the second organic layer 373 , and the organic filling layer 501 replaces the first inorganic layer 342 , the second inorganic layer 371 , and the third inorganic layer 372 , respectively.

Optionally, the flexible laminate 500 is specifically applied to the non-effective display area of the flexible screen 30, such as the bending area 32 of the folding screen 100, the non-effective display area of the frame of the flexible screen, the four corner areas of the flexible screen, etc.

Optionally, the main component of the organic matter filled in the organic filling layer may be resin, for example, one or more of polyimide resin, siloxane resin, and acrylic resin.

Optionally, the composition of the organic matter filled in the organic filling layer may be the same as or different from the material composition of the organic layer adjacent to the organic filling layer. For example, the composition material of the organic layer 502 may be the same as or different from the organic matter filled in the organic filling layer 501 .

In parallel with the embodiment shown in FIG. 5 , FIG. 6 shows a schematic diagram of the front structural view of another flexible stack 600 provided in an embodiment of the present application.

As can be seen from Figure 6, the flexible stack 600 includes an organic layer 602 and an organic filling layer 601 (as shown in (c) in Figure 6), wherein the organic filling layer 601 is obtained by filling an opening 604 on an inorganic matrix 603 (as shown in (b) in Figure 6), and the inorganic matrix 603 is obtained by opening a hole in the inorganic layer 605 (as shown in (a) in Figure 6).

The embodiment of the present application does not limit the shape of the opening 604 on the inorganic substrate 603. For example, it can be a circular opening, a square opening, or a diamond-shaped opening, and the present application does not limit this.

In the embodiment of the present application, there is only one opening 604 on the inorganic layer, and the aperture size of the opening 604 depends on the size of the non-effective display area. For example, when the non-effective display area is the bending area 32 shown in FIG. 1 , the aperture size of the opening 604 can be any value less than d1.

Among them, the value of width d1 can be determined according to the length of the arc formed when the folding screen is bent, and the arc length is positively correlated with the value of d1; the value of d1 can also be adjusted according to actual needs, and this application does not limit this.

Optionally, the upper diameter and the lower diameter of the opening 604 may be the same or different; and the upper shape and the lower shape of the opening 604 may be the same or different.

When the flexible laminate 600 is applied to the flexible screen 30:

In a possible implementation, the organic layer 602 is the first organic layer 343 , and the organic filling layer 601 replaces the first inorganic layer 342 .

In a possible implementation, the organic layer 602 is the second organic layer 373 , and the organic filling layer 601 replaces the second inorganic layer 371 and the third inorganic layer 372 .

In a possible implementation, the organic layer 602 is the first organic layer 343 and the second organic layer 373 , and the organic filling layer 601 replaces the first inorganic layer 342 , the second inorganic layer 371 , and the third inorganic layer 372 , respectively.

Optionally, the main component of the organic matter filled in the organic filling layer 601 may be resin, for example, one or more of polyimide resin, siloxane resin, and acrylic resin may be used.

Optionally, the composition of the organic matter filled in the organic filling layer 601 may be the same as or different from the material composition of the organic layer adjacent to the organic filling layer 601 . For example, the composition material of the organic layer 602 may be the same as or different from the organic matter filled in the organic filling layer 601 .

In parallel with the embodiments shown in FIG. 5 and FIG. 6 , FIG. 7 shows a schematic diagram of the front structural view of another flexible stack 700 provided in an embodiment of the present application.

As can be seen from Figure 7, the flexible stack 700 includes an organic layer 702 and an organic filling layer 701 (as shown in (b) in Figure 7), wherein the organic filling ratio of the organic filling layer 701 is 100%, that is, the original inorganic layer 703 is replaced with the organic filling layer 701 with a filling ratio of 100%, thereby obtaining the flexible stack 700.

When the flexible laminate 700 is applied to the flexible screen 30:

In a possible implementation, the organic layer 702 is the first organic layer 343 , and the organic filling layer 701 replaces the first inorganic layer 342 .

In a possible implementation, the organic layer 702 is the second organic layer 373 , and the organic filling layer 701 replaces the second inorganic layer 371 and the third inorganic layer 372 .

In a possible implementation, the organic layer 702 is the first organic layer 343 and the second organic layer 373 , and the organic filling layer 701 replaces the first inorganic layer 342 , the second inorganic layer 371 , and the third inorganic layer 372 , respectively.

In an embodiment of the present application, a flexible laminate is applied to the non-effective display area of the flexible screen 30. Since the deformation resistance of organic materials is significantly better than that of inorganic materials, organic materials are filled in the inorganic layer in the back panel 34 and/or the touch layer 37 in this area to reduce the area ratio of the inorganic layer that is prone to failure. This can reduce the deformation stress on the flexible screen 30 when it is bent, thereby avoiding poor display such as black spots or a black screen on the flexible screen 30 caused by cracks in the inorganic layer.

8 to 22 , the main view structure of the cross section of the non-effective display area when the flexible stack provided in the embodiment of the present application is applied to the non-effective display area of the flexible screen is introduced.

For example, Fig. 8 shows a schematic diagram of the front view structure of a flexible screen 80 provided in an embodiment of the present application. The touch layer 820 of the flexible screen 80 uses the flexible laminate 500 provided in the embodiment shown in Fig. 5 .

As shown in FIG. 8 , the flexible screen 80 may include a back panel 34 , a light emitting layer 35 , an encapsulation layer 36 and a touch layer 820 which are stacked.

The back plate 34 may be located on the backlight side of the light emitting layer 35 to protect the light emitting layer 35. The encapsulation layer 36 may be located on the light emitting side of the light emitting layer 35. The touch layer 820 may be located on the side of the encapsulation layer 36 away from the light emitting layer 35 to protect the encapsulation layer 36 and the light emitting layer 35 and provide a touch interface for the user.

Among them, the backplane 34 may include a substrate 341, a first inorganic layer 342, and a first organic layer 343, wherein the first inorganic layer 342 is an inorganic insulating layer in the backplane 34, for example, one or more of silicon nitride (SiNx), silicon oxide (SiOx), and silicon oxynitride (SiONx) may be used; the first organic layer 343 is a driving circuit in the backplane 34, and the main component is resin, for example, one or more of polyimide resin, siloxane resin, and acrylic resin may be used.

The touch layer 820 may include a first organic filling layer 821 , a second organic filling layer 822 , and a second organic layer 373 , wherein the first organic filling layer 821 is obtained by filling the second inorganic layer 371 with organic material; and the second organic filling layer 822 is obtained by filling the third inorganic layer 372 with organic material.

Optionally, the second inorganic layer 371 and the third inorganic layer 372 are inorganic insulating layers in the touch layer 37, for example, one or more of silicon nitride (SiNx), silicon oxide (SiOx), and silicon oxynitride (SiONx) can be used; the second organic layer is a driving circuit in the touch layer 37, and its main component is resin, for example, one or more of polyimide resin, siloxane resin, and acrylic resin can be used.

Optionally, the main component of the organic material filler in the first organic filling layer 821 and the second organic filling layer 822 may be resin, for example, one or more of polyimide resin, siloxane resin, and acrylic resin.

The organic material filler in the first organic filling layer 821 , the organic material filler in the second organic filling layer 822 , and the organic material in the second organic layer 373 may have the same organic material composition, may not be the same organic material composition, or may be completely different organic material composition.

The explanation of the opening 810 on the inorganic layer is the same as the explanation of the opening 504 in the embodiment shown in FIG. 5 , and will not be repeated here for the sake of brevity.

For example, Fig. 9 shows a schematic diagram of the front view structure of a flexible screen 90 provided in an embodiment of the present application. The flexible laminate 500 provided in the embodiment shown in Fig. 5 is applied to the back plate 910 of the flexible screen 90.

As shown in FIG. 9 , the flexible screen 90 may include a back panel 920 , a light emitting layer 35 , an encapsulation layer 36 and a touch layer 37 which are stacked.

Among them, the back plate 910 can be located on the backlight side of the light-emitting layer 35 to protect the light-emitting layer 35. The encapsulation layer 36 can be located on the light-emitting side of the light-emitting layer 35. The touch layer 37 can be located on the side of the encapsulation layer 36 away from the light-emitting layer 35 to protect the encapsulation layer 36 and the light-emitting layer 35 and provide a user touch interface.

The explanation of the light emitting side and the light emitting layer 35 is explained in detail in the embodiment shown in FIG. 8 , and will not be repeated here for the sake of brevity.

The backplane 920 may include a substrate 341 , a third organic filling layer 921 , and a first organic layer 343 , wherein the third organic filling layer 921 is obtained by filling an organic material in the first inorganic layer 342 .

The touch layer 37 may include a second inorganic layer 371 , a third inorganic layer 372 , and a second organic layer 373 .

The compositions of the first inorganic layer 342 , the second inorganic layer 371 and the third inorganic layer 372 are described in detail in the embodiment shown in FIG. 8 , and will not be described again for the sake of brevity.

Optionally, the main component of the organic material filler in the third organic filling layer 921 may be resin, for example, one or more of polyimide resin, siloxane resin, and acrylic resin.

The organic material filler in the third organic filling layer 921 and the organic material in the first organic layer 343 may have the same or different organic material compositions.

The explanation about the opening 910 on the inorganic layer is the same as the explanation about the opening 501 in the embodiment shown in FIG. 5 , and will not be repeated here for the sake of brevity.

For example, Fig. 10 shows a schematic diagram of the front view structure of a flexible screen 1000 provided in an embodiment of the present application. The flexible laminate 500 provided in the embodiment shown in Fig. 5 is applied to both the back plate 1010 and the touch layer 1020 of the flexible screen 1000.

As shown in FIG. 10 , the flexible screen 1000 may include a back panel 1010 , a light emitting layer 35 , an encapsulation layer 36 , and a touch layer 1020 which are stacked.

Among them, the back plate 1010 has the same structure as the back plate 920 described in the embodiment shown in Figure 9, and the touch layer 1020 has the same structure as the touch layer 820 described in the embodiment shown in Figure 8, which will not be repeated here for the sake of brevity.

For example, Fig. 11 shows a schematic diagram of the main structure of a flexible screen 1100 provided in an embodiment of the present application. The touch layer 1120 of the flexible screen 1100 uses the flexible laminate 600 provided in the embodiment shown in Fig. 6 .

As shown in FIG. 11 , the flexible screen 1100 may include a back panel 34 , a light emitting layer 35 , an encapsulation layer 36 and a touch layer 1120 which are stacked.

The back plate 34 may be located on the backlight side of the light emitting layer 35 to protect the light emitting layer 35. The encapsulation layer 36 may be located on the light emitting side of the light emitting layer 35. The touch layer 1120 may be located on the side of the encapsulation layer 36 away from the light emitting layer 35 to protect the encapsulation layer 36 and the light emitting layer 35 and provide a touch interface for the user.

The backplane 34 may include a substrate 341 , a first inorganic layer 342 , and a first organic layer 343 .

The touch layer 1120 may include a first organic filling layer 1121 , a second organic filling layer 1122 , and a second organic layer 373 , wherein the first organic filling layer 1121 is obtained by filling an organic material in the second inorganic layer 371 ; and the second organic filling layer 1122 is obtained by filling an organic material in the third inorganic layer 372 .

Optionally, the second organic layer 373 is a driving circuit in the touch layer 1120 , and its main component is resin, for example, one or more of polyimide resin, siloxane resin, and acrylic resin may be used.

Optionally, the main component of the organic material filler in the first organic filling layer 1121 and the second organic filling layer 1122 may be resin, for example, one or more of polyimide resin, siloxane resin, and acrylic resin.

The organic material filler in the first organic filling layer 1121 , the organic material filler in the second organic filling layer 1122 , and the organic material in the second organic layer 373 may have the same organic material composition, may not be the same organic material composition, or may be completely different organic material composition.

The explanation about the opening 1110 on the inorganic layer is the same as the explanation about the opening 601 in the embodiment shown in FIG. 6 , and will not be repeated here for the sake of brevity.

For example, Fig. 12 shows a schematic diagram of the front view structure of a flexible screen 1200 provided in an embodiment of the present application. The flexible laminate 600 provided in the embodiment shown in Fig. 6 is applied to the back plate 1220 of the flexible screen 1200.

As shown in FIG. 12 , the flexible screen 1200 may include a back panel 1220 , a light emitting layer 35 , an encapsulation layer 36 and a touch layer 37 which are stacked.

The back plate 1220 may be located on the backlight side of the light emitting layer 35 to protect the light emitting layer 35. The encapsulation layer 36 may be located on the light emitting side of the light emitting layer 35. The touch layer 37 may be located on the side of the encapsulation layer 36 away from the light emitting layer 35 to protect the encapsulation layer 36 and the light emitting layer 35 and provide a touch interface for the user.

The backplane 1220 may include a substrate 341 , a third organic filling layer 1221 , and a first organic layer 343 , wherein the third organic filling layer 1221 is obtained by filling an organic material in the first inorganic layer 342 .

Optionally, the main component of the organic material filler in the third organic filling layer 1221 may be resin, for example, one or more of polyimide resin, siloxane resin, and acrylic resin.

The organic material filler in the third organic filling layer 1221 and the organic material in the first organic layer 343 may have the same or different organic material compositions.

The explanation about the opening 1210 on the inorganic layer is the same as the explanation about the opening 601 in the embodiment shown in FIG. 6 , and will not be repeated here for the sake of brevity.

For example, Fig. 13 shows a schematic diagram of the front view structure of a flexible screen 1300 provided in an embodiment of the present application. The touch layer 1310 of the flexible screen 1300 uses the flexible laminate 700 provided in the embodiment shown in Fig. 7 .

As shown in FIG. 13 , the flexible screen 1300 may include a back panel 34 , a light emitting layer 35 , an encapsulation layer 36 , and a touch layer 1320 which are stacked.

The back plate 34 may be located on the backlight side of the light emitting layer 35 to protect the light emitting layer 35. The encapsulation layer 36 may be located on the light emitting side of the light emitting layer 35. The touch layer 1310 may be located on the side of the encapsulation layer 36 away from the light emitting layer 35 to protect the encapsulation layer 36 and the light emitting layer 35 and provide a touch interface for the user.

The touch layer 1310 may include a first organic filling layer 1311 , a second organic filling layer 1312 , and a second organic layer 373 , wherein the first organic filling layer 1311 is obtained by filling an organic material in the second inorganic layer 371 ; and the second organic filling layer 1312 is obtained by filling an organic material in the third inorganic layer 372 .

Moreover, in this embodiment, the filling ratio of organic material in the second inorganic layer 371 is 100%, and the filling ratio of organic material in the third inorganic layer 372 is 100%, that is, the organic layer composed of organic material replaces the original second inorganic layer 371 and the third inorganic layer 372.

Optionally, the second organic layer is a driving circuit in the touch layer 1310 , and a main component thereof is resin, for example, one or more of polyimide resin, siloxane resin, and acrylic resin may be used.

Optionally, the main component of the organic material filler in the first organic filling layer 1311 and the second organic filling layer 1312 may be resin, for example, one or more of polyimide resin, siloxane resin, and acrylic resin.

The organic material filler in the first organic filling layer 1311 , the organic material filler in the second organic filling layer 1312 , and the organic material in the second organic layer 373 may have the same organic material composition, may not be the same organic material composition, or may be completely different organic material composition.

In one possible implementation, the filling condition of the first organic filling layer 1311 is the same as the filling condition described in the embodiment shown in FIG. 7 (the filling ratio is 100%), and the filling condition of the second organic filling layer 1312 is the same as the filling condition described in the embodiment shown in FIG. 5 or FIG. 6 (multi-hole filling or single-hole filling).

In another possible implementation, the filling condition of the first organic filling layer 1311 is the same as the filling condition described in the embodiment shown in Figure 5 or Figure 6 (porous filling or single-hole filling), and the filling condition of the second organic filling layer 1312 is the same as the filling condition described in the embodiment shown in Figure 7 (filling ratio is 100%).

In another possible implementation, the filling condition of the first organic filling layer 1311 is the same as the filling condition described in the embodiment shown in FIG. 5 (multi-hole filling), and the filling condition of the second organic filling layer 1312 is the same as the filling condition described in the embodiment shown in FIG. 6 (single-hole filling).

In another possible implementation, the filling condition of the first organic filling layer 1311 is the same as the filling condition described in the embodiment shown in FIG. 6 (single-hole filling), and the filling condition of the second organic filling layer 1312 is the same as the filling condition described in the embodiment shown in FIG. 5 (multi-hole filling).

For example, Fig. 14 shows a schematic diagram of the front view structure of a flexible screen 1400 provided in an embodiment of the present application. The flexible laminate 700 provided in the embodiment shown in Fig. 7 is applied to the back plate 1410 of the flexible screen 1400.

As shown in FIG. 14 , the flexible screen 1400 may include a back panel 1410 , a light emitting layer 35 , an encapsulation layer 36 , and a touch layer 37 which are stacked.

Among them, the back plate 1410 can be located on the backlight side of the light-emitting layer 35 to protect the light-emitting layer 35. The encapsulation layer 36 can be located on the light-emitting side of the light-emitting layer 35. The touch layer 37 can be located on the side of the encapsulation layer 36 away from the light-emitting layer 35 to protect the encapsulation layer 36 and the light-emitting layer 35 and provide a user touch interface.

The backplane 1410 may include a substrate 341 , a third organic filling layer 1411 , and a first organic layer 343 , wherein the third organic filling layer 1411 is filled with 100% organic material, that is, the organic layer composed of organic material replaces the original first inorganic layer 342 .

The first organic layer 343 is a driving circuit in the backplane 1410 , and its main component is resin, for example, one or more of polyimide resin, siloxane resin, and acrylic resin can be used.

Optionally, the main component of the organic material filler in the third organic filling layer 1411 may be resin, for example, one or more of polyimide resin, siloxane resin, and acrylic resin.

The organic material filler in the third organic filling layer 1411 and the organic material in the first organic layer 343 may have the same or different organic material compositions.

For example, Fig. 15 shows a schematic diagram of the front view structure of a flexible screen 1500 provided in an embodiment of the present application. The back plate 1510 of the flexible screen 1500 applies the flexible laminate 600 provided in the embodiment shown in Fig. 6, and the touch layer 1520 applies the flexible laminate 500 provided in the embodiment shown in Fig. 5.

As shown in FIG. 15 , the flexible screen 1500 may include a back panel 1510 , a light emitting layer 35 , an encapsulation layer 36 , and a touch layer 1520 which are stacked.

Among them, the back plate 1510 has the same structure as the back plate 1220 described in the embodiment shown in Figure 12, and the touch layer 1520 has the same structure as the touch layer 820 described in the embodiment shown in Figure 8, which will not be repeated here for the sake of brevity.

For example, Fig. 16 shows a schematic diagram of the front view structure of a flexible screen 1600 provided in an embodiment of the present application. The back plate 1610 of the flexible screen 1600 uses the flexible laminate 700 provided in the embodiment shown in Fig. 7, and the touch layer 1520 uses the flexible laminate 500 provided in the embodiment shown in Fig. 5.

As shown in FIG. 16 , the flexible screen 1600 may include a back panel 1610 , a light emitting layer 35 , an encapsulation layer 36 , and a touch layer 1620 which are stacked.

Among them, the back plate 1610 has the same structure as the back plate 1410 described in the embodiment shown in Figure 14, and the touch layer 1620 has the same structure as the touch layer 820 described in the embodiment shown in Figure 8, which will not be repeated here for the sake of brevity.

For example, Fig. 17 shows a schematic diagram of the front view structure of a flexible screen 1700 provided in an embodiment of the present application. The back plate 1710 of the flexible screen 1700 applies the flexible laminate 500 provided in the embodiment shown in Fig. 5, and the touch layer 1720 applies the flexible laminate 600 provided in the embodiment shown in Fig. 6.

As shown in FIG. 17 , the flexible screen 1700 may include a back panel 1710 , a light emitting layer 35 , an encapsulation layer 36 , and a touch layer 1720 which are stacked.

Among them, the back plate 1710 has the same structure as the back plate 920 described in the embodiment shown in Figure 9, and the touch layer 1720 has the same structure as the touch layer 1120 described in the embodiment shown in Figure 11, which will not be repeated here for the sake of brevity.

For example, Fig. 18 shows a schematic diagram of the front view structure of a flexible screen 1800 provided in an embodiment of the present application. The flexible laminate 600 provided in the embodiment shown in Fig. 6 is applied to both the back plate 1810 and the touch layer 1820 of the flexible screen 1800.

As shown in FIG. 18 , the flexible screen 1800 may include a back panel 1810 , a light emitting layer 35 , an encapsulation layer 36 , and a touch layer 1820 which are stacked.

Among them, the back plate 1810 has the same structure as the back plate 1220 described in the embodiment shown in Figure 12, and the touch layer 1820 has the same structure as the touch layer 1120 described in the embodiment shown in Figure 11, which will not be repeated here for the sake of brevity.

For example, Fig. 19 shows a schematic diagram of the front view structure of a flexible screen 1900 provided in an embodiment of the present application. The back plate 1910 of the flexible screen 1900 applies the flexible laminate 700 provided in the embodiment shown in Fig. 7, and the touch layer 1920 applies the flexible laminate 600 provided in the embodiment shown in Fig. 6.

As shown in FIG. 19 , the flexible screen 1900 may include a back panel 1910 , a light emitting layer 35 , an encapsulation layer 36 , and a touch layer 1920 which are stacked.

Among them, the back plate 1910 has the same structure as the back plate 1410 described in the embodiment shown in Figure 14, and the touch layer 1920 has the same structure as the touch layer 1120 described in the embodiment shown in Figure 11, which will not be repeated here for the sake of brevity.

For example, Fig. 20 shows a schematic diagram of the front view structure of a flexible screen 2000 provided in an embodiment of the present application. The back plate 2010 of the flexible screen 2000 uses the flexible laminate 700 provided in the embodiment shown in Fig. 7, and the touch layer 2020 uses the flexible laminate 500 provided in the embodiment shown in Fig. 5.

As shown in FIG. 20 , the flexible screen 2000 may include a back panel 2010 , a light emitting layer 35 , an encapsulation layer 36 and a touch layer 2020 which are stacked.

Among them, the back plate 2010 has the same structure as the back plate 920 described in the embodiment shown in Figure 9, and the touch layer 2020 has the same structure as the touch layer 1310 described in the embodiment shown in Figure 13, which will not be repeated here for the sake of brevity.

For example, Fig. 21 shows a schematic diagram of the main structure of a flexible screen 2100 provided in an embodiment of the present application. The back plate 2110 of the flexible screen 2100 applies the flexible laminate 700 provided in the embodiment shown in Fig. 7, and the touch layer 2120 applies the flexible laminate 600 provided in the embodiment shown in Fig. 6.

As shown in FIG. 21 , the flexible screen 2100 may include a back panel 2110 , a light emitting layer 35 , an encapsulation layer 36 and a touch layer 2120 which are stacked.

Among them, the back plate 2110 has the same structure as the back plate 1220 described in the embodiment shown in Figure 12, and the touch layer 2120 has the same structure as the touch layer 1310 described in the embodiment shown in Figure 13, which will not be repeated here for the sake of brevity.

For example, Fig. 22 shows a schematic diagram of the main structure of a flexible screen 2200 provided in an embodiment of the present application. The flexible laminate 700 provided in the embodiment shown in Fig. 7 is applied to the back plate 2210 of the flexible screen 2200, and the flexible laminate 700 provided in the embodiment shown in Fig. 7 is also applied to the touch layer 2220.

As shown in FIG. 22 , the flexible screen 2200 may include a back panel 2210 , a light emitting layer 35 , an encapsulation layer 36 and a touch layer 2220 which are stacked.

Among them, the back plate 2210 has the same structure as the back plate 1410 described in the embodiment shown in Figure 14, and the touch layer 2220 has the same structure as the touch layer 1310 described in the embodiment shown in Figure 13, which will not be repeated here for the sake of brevity.

Hereinafter, the inorganic removal area (organic filling area) provided in the embodiment of the present application will be introduced in conjunction with FIG. 23 to FIG. 26 .

In the present application, the inorganic removal area is the non-effective display area of the flexible screen, which may be the folding area of the foldable electronic device, the areas where the four corners of the flexible screen are located, or the edge area of the flexible screen.

For example, Figure 23 shows a schematic diagram of an inorganic removal area provided in an embodiment of the present application. Figure 23 (a) is a structural schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application. As can be seen from Figure 23 (a), the foldable electronic device 100 includes a bending area 32, and the width of the bending area is d1.

The inorganic removal area of the flexible screen 30 of the foldable electronic device 100 is located in the bending area 32. Specifically, the bending area 32 may be entirely inorganically removed and filled with organic matter; or the bending area 32 may be partially inorganically removed and filled with organic matter.

Among them, local inorganic removal includes single-hole removal and multi-hole removal. The introduction of single-hole removal (single-hole filling) and multi-hole removal (multi-hole filling) has been introduced in detail in the embodiments shown in Figures 5 and 6. For the sake of brevity, it will not be repeated here.

Optionally, when inorganic removal is performed on the bending region 32 of the foldable electronic device 100, the pixel opening area in the region can be avoided.

Illustratively, (b) in FIG. 23 shows an enlarged view of region D provided in an embodiment of the present application, wherein region D is located in the bending region 32 of the foldable electronic device 100 .

As can be seen from (b) in Figure 23, a plurality of pixel openings 2301, a plurality of pixel openings 2301 and a plurality of pixel openings 2303 are regularly distributed in the bending area 32 of the flexible screen. In area D, except for the plurality of pixel openings 2301, the plurality of pixel openings 2302 and the plurality of pixel openings 2303, the portions are all inorganically removable areas (the blank areas shown in (b) in Figure 23).

In one example, if the inorganic removal method is local porous removal, then the corresponding inorganic removal area may be the multiple inorganic removal areas 2304 shown in (b) of FIG. 23 .

In the embodiment of the present application, since the inorganic layer in the flexible screen of the foldable electronic device has poor deformation resistance, during the folding process of the foldable electronic device, the bending area of the screen will be subjected to large deformation stress, which may cause the inorganic layer of the flexible screen to be subjected to large deformation stress and rupture, thereby causing the screen of the foldable electronic device to have poor display such as black spots or a black screen. The scheme of the embodiment reduces the area ratio of the inorganic layer by partially or entirely removing the inorganic layer at the hinge position (bending area 32) corresponding to the folding screen of the foldable electronic device, and filling the inorganic layer removed area with organic material (with better anti-deformation performance), thereby making full use of the better anti-deformation ability and larger deformation failure threshold of the organic layer, which can significantly improve the bending resistance of the bending area of the folding screen and help to achieve a smaller radius of bending, thereby reducing the thickness and weight of the foldable electronic device.

For example, Figure 24 shows a schematic diagram of another inorganic removal area provided in an embodiment of the present application. Figure 24 (a) is a structural schematic diagram of a flexible screen 2400 of an electronic device provided in an embodiment of the present application. As can be seen from Figure 24 (a), the flexible screen 2400 of the electronic device includes four rounded corners A1, A2, A3 and A4.

The inorganic removal area of the flexible screen 2400 of the electronic device is located in one or more of the four rounded corners A1, A2, A3 and A4. Specifically, the rounded corner area can be completely inorganically removed and filled with organic material, or partially inorganically removed and filled with organic material in the rounded corner area.

Optionally, when inorganic removal is performed on the rounded corner area of the flexible screen 2400 of the electronic device, the pixel opening area in the area can be avoided.

Illustratively, (b) in FIG. 24 shows an enlarged view of the rounded corner area A1 provided in an embodiment of the present application.

As shown in (b) of FIG. 24 , the rounded corner area A1 of the flexible screen 2400 of the electronic device includes the B1 area, the B2 area, the B3 area and the B4 area, and the B1 area, the B2 area, the B3 area and the B4 area are all structural areas in the frame of the light-emitting layer, wherein the structure of the B1 area is a retaining wall of a thin film encapsulation structure (e.g., DAM), the structure of the B2 area is a broken screen detection circuit (e.g., PCD), the structure of the B3 area is a power line (e.g., ELVSS), and the structure of the B3 area is a display driving circuit (e.g., EOA/GOA). Among them, a plurality of pixel openings 2401 and a plurality of pixel openings 2402 are regularly distributed in the B3 area and the B4 area, and in the B3 area and the B4 area, the parts other than the plurality of pixel openings 2401 and the plurality of pixel openings 2402 are all inorganically removable areas, and in addition, the B2 area is also an inorganically removable area.

In one example, if the inorganic removal method is local porous removal, then the corresponding inorganic removal area can be the multiple inorganic removal areas shown in (b) of FIG. 24 (such as the blank filled box area shown in (b) of FIG. 24).

Optionally, inorganic removal is performed on the rounded corner area A1 in a sector-shaped area formed by the angle θ.

Among them, the angle θ can be determined according to factors such as the display radius R, the curved surface fitting depth h, etc., and can also be selected according to actual needs, and this application does not limit this.

For example, Fig. 25 shows a schematic diagram of another inorganic removal area provided in an embodiment of the present application. Fig. 25 (a) is a schematic diagram of the structure of a flexible screen 2400 of an electronic device provided in an embodiment of the present application.

In (a) of FIG. 25 , the area formed by the frame 2501 is the display area of the flexible screen 2400 of the electronic device. The area formed by the frame 2501 and the dotted frame is the edge area of the display area, and (b) of FIG. 25 is an enlarged view of area E in (a) of FIG. 25 .

In (b) shown in FIG. 25 , the width of the edge region of the display area is d2 , and the edge region of the display area is the inorganically removable region.

Optionally, the value range of d2 is greater than or equal to 1 mm, for example, its exemplary value may be 2 mm.

That is, the inorganic removal area of the flexible screen 2400 of the electronic device is located in the edge area of the display area. Specifically, the edge area of the display area can be completely inorganically removed and filled with organic materials, or the edge area of the display area can be partially inorganically removed and filled with organic materials.

Optionally, when inorganic removal is performed on the edge area of the display area of the flexible screen 2400 of the electronic device, the pixel opening area in the area can be avoided.

The pixel openings in the edge area of the display area and the distribution of the pixel openings are the same as those described in the embodiment shown in FIG. 23 , and will not be described again for the sake of brevity.

Based on the embodiment shown in Figure 25, Figure 26 shows, by way of example, another schematic diagram of an inorganic removal area provided in an embodiment of the present application. (a) in Figure 26 is a schematic diagram of the structure of a flexible screen 2400 of an electronic device provided in an embodiment of the present application.

In (a) of FIG. 26 , the area formed by the frame 2601 is the display area of the flexible screen 2400 of the electronic device. In the embodiment of the present application, based on the embodiment shown in FIG. 25 , the inorganic removal area is retracted from the frame 2601 by a width d3. As shown in (a) of FIG. 26 and (b) of FIG. 26 , the area formed by the dotted frame 2602 and the dotted frame 2603 is the inorganic removal area, and its width is d2. The width of the area formed by the frame 2601 and the dotted frame 2602 is the width d3 of the retracted inorganic removal area. Among them, (b) of FIG. 26 is an enlarged view of the area F in (a) of FIG. 26 . Specifically, the inorganic removal area formed by the dotted frame 2602 and the dotted frame 2603 can be subjected to overall inorganic removal and organic filling; it can also be subjected to partial inorganic removal in the inorganic removal area formed by the dotted frame 2602 and the dotted frame 2603, and organic filling can be performed.

Optionally, when performing inorganic removal in the inorganic removal area formed by the dotted line frame 2602 and the dotted line frame 2603 , the pixel opening area in the area can be avoided.

The pixel openings in this area and the distribution of the pixel openings are the same as those described in the embodiment shown in Figure 23, and for the sake of brevity, they will not be repeated here.

Optionally, the value range of d3 is greater than or equal to 0 mm, for example, its exemplary value may be 1 mm.

For example, FIG27 shows a schematic flow chart of a method 2700 for manufacturing a flexible laminate provided in an embodiment of the present application. As shown in FIG27 , the method 2700 includes:

S2710: performing inorganic removal on the target inorganic layer.

Optionally, there are three specific removal forms for inorganic removal of the target inorganic layer, namely: single-hole removal, multi-hole removal and whole-layer removal, and the corresponding filling forms are: single-hole filling (filling ratio is less than 100%), multi-hole filling (filling ratio is less than 100%) and overall replacement (filling ratio is 100%). Among them, the specific filling structure, inorganic removal area, inorganic removal opening method, distribution of inorganic removal area, composition of organic materials in organic filling, composition of inorganic materials in inorganic layer, etc. have been described in detail in the embodiments shown in Figures 5 to 26, and for the sake of brevity, they will not be repeated here.

Optionally, the target inorganic layer is inorganically removed by etching.

Specifically, the target inorganic layer may be inorganically removed by etching gas, and the etching gas may be one or more of NF ₃ , CF ₄ , and CHF ₃ , or other etching gases, which are not limited in the present application.

S2720: Perform organic filling at the locations where inorganic removal occurs to produce a flexible laminate.

The organic filling method may be a coating method, and the organic material is filled in the inorganic removal area during the coating process by utilizing the good fluidity of the organic material.

In the embodiments of the present application, the inorganic layer is partially or entirely removed and the organic material (with excellent anti-deformation performance) is filled in the inorganic layer removal area, thereby reducing the area ratio of the inorganic layer and significantly improving the anti-deformation ability of the flexible stack.

For example, FIG28 shows a schematic flow chart of a method 2800 for manufacturing a flexible screen provided in an embodiment of the present application. As shown in FIG28 , the method 2800 includes:

S2810: performing inorganic removal on the target inorganic layer.

The target inorganic layer includes any one or more of the first inorganic layer 342, the second inorganic layer 371 and the third inorganic layer 372. The first inorganic layer 342, the second inorganic layer 371 and the third inorganic layer 372 have been explained in detail in the embodiment shown in FIG3, and will not be repeated here for the sake of brevity.

Optionally, there are three specific removal forms for inorganic removal of the target inorganic layer, namely: single-hole removal, multi-hole removal and whole-layer removal, and the corresponding filling forms are: single-hole filling (filling ratio is less than 100%), multi-hole filling (filling ratio is less than 100%) and Overall replacement (filling ratio is 100%). The specific filling structure, inorganic removal area, inorganic removal opening method, distribution of inorganic removal area, composition of organic material of organic filling, composition of inorganic material in inorganic layer, etc. have been described in detail in the embodiments shown in Figures 5 to 26, and will not be repeated here for the sake of brevity.

S2820: Perform organic filling at the location where the inorganic layer is removed to produce a flexible screen.

In an embodiment of the present application, by partially or entirely removing the inorganic layer in the inorganically removable area of the flexible screen of the electronic device and filling the inorganic layer removed area with organic material (having better anti-deformation performance), the area ratio of the inorganic layer is reduced, which can significantly improve the anti-deformation ability of the flexible screen.

The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A flexible screen, characterized in that the flexible screen comprises in the horizontal direction: a first main body area, a bending area and a second main body area, the bending area is connected between the first main body area and the second main body area, and the flexible screen comprises in the thickness direction: a stacked backplane and a touch layer, the backplane comprises a flexible stack, and/or the touch layer comprises the flexible stack, the flexible stack comprises: a stacked first organic filling layer and a first organic layer, wherein the first organic filling layer comprises a first inorganic matrix and one or more organic fillers, one or more openings are distributed on the first inorganic matrix, and the one or more organic fillers are respectively located in the one or more openings and fit with the one or more openings.
The flexible screen according to claim 1 is characterized in that a distribution area of the one or more openings corresponds to the bending area.
The flexible screen according to claim 1 or 2 is characterized in that the distribution area of the one or more openings corresponds to the non-effective display area of the flexible screen.
The flexible screen according to any one of claims 1 to 3 is characterized in that the non-effective display area of the flexible screen includes the four corner areas of the flexible screen.
The flexible screen according to any one of claims 1 to 4 is characterized in that the non-effective display area of the flexible screen includes an edge area of the effective display area of the flexible screen.
The flexible screen according to any one of claims 1 to 5, characterized in that the one or more openings are located outside the pixel opening area of the flexible screen.
The flexible screen according to any one of claims 1 to 6 is characterized in that the flexible screen also includes a light-emitting layer and an encapsulation layer, the light-emitting layer is stacked between the touch layer and the encapsulation layer, and the encapsulation layer is stacked between the light-emitting layer and the back panel.
The flexible screen according to any one of claims 1 to 7 is characterized in that the organic filler is composed of one or more of polyimide resin, siloxane resin, and acrylic resin.
The flexible screen according to any one of claims 1 to 8 is characterized in that the shape of the one or more openings is one or more of a cylinder, a truncated cone, a cuboid, a prism, and an elliptical cylinder.
The flexible screen according to any one of claims 1 to 9 is characterized in that the hole depth of the one or more openings is 0.2 microns to 5 microns.
The flexible screen according to any one of claims 1 to 10 is characterized in that the upper aperture of the one or more openings is greater than or equal to 2 microns.
The flexible screen according to claim 11 is characterized in that the upper aperture of the one or more openings is 3 microns to 5 microns.
The flexible screen according to any one of claims 1 to 12 is characterized in that the hole depths or hole diameters of the one or more openings are not completely the same, and the hole diameter includes the upper hole diameter and the lower hole diameter.
The flexible screen according to any one of claims 1 to 13, characterized in that the flexible stack further comprises a second organic filling layer, and the second organic filling layer is stacked with the first organic filling layer, wherein:

The second organic filling layer includes a second inorganic matrix and the one or more organic filling bodies. The second inorganic matrix is provided with the one or more openings. The one or more organic filling bodies are respectively located in the one or more openings and match the one or more openings.
A method for preparing a flexible screen, characterized in that the method comprises:

Forming one or more openings on the target inorganic layer by inorganically removing the target inorganic layer to obtain an inorganic matrix;

coating an organic material on the inorganic substrate so that the organic material fills the one or more openings to produce a flexible laminate;

The flexible stack is arranged in the back plate of the flexible screen and/or the touch layer of the flexible screen.
The method according to claim 15 is characterized in that the target inorganic layer includes any one or more of a first inorganic layer, a second inorganic layer and a third inorganic layer, the first inorganic layer is located in the backplane, and the second inorganic layer and the third inorganic layer are located in the touch layer.
The method according to claim 15 or 16 is characterized in that the distribution area of the one or more openings corresponds to the bending area of the flexible screen.
The method according to any one of claims 15 to 17 is characterized in that the distribution area of the one or more openings corresponds to the non-effective display area of the flexible screen.
The method according to any one of claims 15 to 18 is characterized in that the non-effective display area of the flexible screen includes the four corner areas of the flexible screen.
The method according to any one of claims 15 to 19 is characterized in that the non-effective display area of the flexible screen includes an edge area of the effective display area of the flexible screen.
The method according to any one of claims 15 to 20 is characterized in that the one or more openings are located outside the pixel opening area of the flexible screen.
The method according to any one of claims 15 to 21, characterized in that the inorganic removal of the target inorganic layer comprises:

The target inorganic layer is inorganically removed by using etching gas, wherein the etching gas includes one or more of NF3, CF4, and CHF3.
The method according to any one of claims 15 to 22 is characterized in that the organic material includes one or more of polyimide resin, siloxane resin, and acrylic resin.
An electronic device, characterized in that it comprises a flexible screen and a shell assembly as described in any one of claims 1 to 14, wherein the flexible screen is connected to the shell assembly.
The electronic device according to claim 24 is characterized in that the electronic device is a foldable electronic device.