CN107104200A - Flexible display panel and flexible display device - Google Patents

Abstract

The application discloses flexible display panel and flexible display device relates to and shows technical field, and this flexible display panel includes: a flexible substrate; a flexible display member on a first surface of the flexible substrate; and the electrostatic shielding layer is positioned on the second surface of the flexible substrate, one side of the electrostatic shielding layer, which is far away from the flexible substrate, is at least positioned in the bending area of the flexible display panel and is of a first corrugated structure, the first corrugated structure comprises at least one first corrugated bulge, and the bulge direction of the first corrugated bulge is far away from the flexible substrate. The part, which is at least located in the bending area of the flexible display panel, of one side, which is far away from the flexible substrate, of the electrostatic shielding layer is designed into a first fold-shaped structure, and when the electrostatic shielding layer is subjected to bending external force which enables the electrostatic shielding layer to have a certain stretching trend or a certain compression trend, the fold-shaped structure, which is located in the bending area, of the electrostatic shielding layer can timely transfer and release the external force, so that the phenomenon that the electrostatic shielding layer is broken or the functional film layer of the flexible display device is damaged after the electrostatic shielding layer is bent for many times.

Description

Flexible display panel and flexible display device

technical field

The present application relates to the field of display technology, in particular, to a flexible display panel and a flexible display device.

Background technique

With the continuous development of display technology, flexible display technology has become one of the important trends, which can satisfy users' requirements for display devices in terms of light weight, portability, low energy consumption, excellent image quality and bendability. various requirements. Among the various implementations of flexible displays, organic light-emitting diode (Organic Light-Emitting Diode, OLED) display technology has attracted widespread attention due to its advantages such as self-illumination, wide viewing angle, low power consumption, and extremely high response speed.

An OLED generally includes an anode electrode, a cathode electrode, and an organic compound layer formed therebetween. The organic compound layer generally includes a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer. When the power supply provides an appropriate driving voltage, the cathode electrode will release negatively charged electrons, and the electron transport layer will transport the electrons released by the cathode electrode to the light-emitting layer through the electron injection layer; the anode electrode will release positively charged holes, holes The transport layer transports positively charged holes to the light emitting layer through the hole transport layer. Once an appropriate driving voltage is applied to the anode and cathode electrodes, the positively charged holes passing through the hole transport layer and the negatively charged electrons passing through the electron injection layer will move to the light emitting layer, where When they meet, excitons are formed, causing the light-emitting layer to emit visible light.

In order to solve the technical problem of flickering on the screen of the flexible display device due to external electromagnetic interference, an electrostatic shielding layer is generally provided on the non-display surface of the flexible display screen, and the electrostatic shielding layer is generally a metal film. Since the electrostatic shielding layer is arranged on the outside of the display and is composed of a metal film, during the bending process of the flexible display device, the metal film as the electrostatic shielding layer will affect the flexible display substrate in the flexible display device and the functions on the flexible display substrate. The film layer generates a relatively large reaction force or reaction force, and vice versa, the flexible display substrate will also generate a relatively large reaction force or reaction force to the electrostatic shielding layer. This will bring two defects: first, the electrostatic shielding layer itself is prone to breakage after repeated bending; second, the functional film layer of the flexible display device, especially the light-emitting layer, is easily damaged after repeated bending , affecting the normal operation of the flexible display device.

Contents of the invention

In view of this, the application provides the following technical solutions:

In a first aspect, the present application provides a flexible display panel, wherein the flexible display panel includes:

flexible substrate;

a flexible display component on the first surface of the flexible substrate; and

An electrostatic shielding layer located on the second surface of the flexible substrate, the first surface is opposite to the second surface, and the side of the electrostatic shielding layer away from the flexible substrate is at least located in the bending area of the flexible display panel A portion of the first wrinkle-shaped structure includes at least one first wrinkle-shaped protrusion, and the protrusion direction of the first wrinkle-shaped protrusion is away from the flexible substrate.

Optionally, where:

The first wrinkle-shaped protrusion has at least one first vertical section that is arc-shaped or sharp-edged;

The normal direction of the first vertical section is parallel to the plane where the flexible substrate is located.

Optionally, where:

The structure of the first vertical section includes: a first crest point and two first trough points, and the horizontal distance between the two first trough points in the same first wrinkled protrusion is 1 μm≤ d ₁ ≤ 1 cm, and the vertical distance between the first crest point and the first trough point in the same first wrinkled protrusion is 0.5 μm ≤ h ₁ ≤ 5 mm.

Optionally, where:

A part of the electrostatic shielding layer on a side away from the flexible substrate outside the bending area of the flexible display panel has a second wrinkle-like structure, and the second wrinkle-like structure includes a plurality of second wrinkle-like protrusions.

Optionally, where:

The second corrugated protrusions are identical to the first corrugated protrusions;

said second corrugated structure is identical to said first corrugated structure;

The side of the electrostatic shielding layer facing away from the flexible substrate has a first corrugated structure as a whole.

Optionally, where:

The first wrinkle-shaped protrusions are strip-shaped protrusions, and the strip-shaped protrusions are arranged along a first direction and extend along a second direction;

The first direction intersects the second direction and is respectively perpendicular to the normal direction of the plane where the flexible substrate is located.

Optionally, where:

The strip-shaped protrusions are arranged continuously along the first direction.

Optionally, where:

The first wrinkle-shaped protrusions are bag-shaped protrusions, and a plurality of the bag-shaped protrusions are scattered and arranged on a side of the electrostatic shielding layer away from the flexible substrate.

Optionally, where:

The bag-shaped protrusions are arranged in the form of hexagonal close-packed or square lattice on the side of the electrostatic shielding layer away from the flexible substrate.

Optionally, where:

When the electrostatic shielding layer is divided into several sub-electrostatic shielding layers of unit size along a direction perpendicular to the plane where the flexible substrate is located, the average thickness of each of the sub-electrostatic shielding layers is the same.

Optionally, where:

The electrostatic shielding layer is an extensible conductive film layer, and the electrostatic shielding layer includes copper, aluminum, silver, gold, copper nanowires, aluminum nanowires, silver nanowires, gold nanowires, conductive carbon nanotubes, graphene Or one or more of graphite powder.

Optionally, where:

The flexible display panel further includes a first protective film, and the first protective film is located between the electrostatic shielding layer and the flexible substrate.

Optionally, where:

The first protective film is used to protect the flexible substrate from damage by external force in the environment of manufacturing, testing or use.

Optionally, where:

The first protective film is a discontinuous structure;

The first protective film has a first notch in the bending area of the flexible display panel.

Optionally, where:

The orthographic projection of the bending area of the flexible display panel on the plane of the first protective film is covered by the orthographic projection of the first notch on the plane of the first protective film.

Optionally, where:

The flexible display panel further includes a second protective film, the second protective film is located on a side of the electrostatic shielding layer away from the flexible substrate, and the second protective film covers the entire electrostatic shielding layer.

Optionally, where:

The second protective film is used to protect the flexible substrate from damage by external force in the environment of manufacturing, testing or use.

Optionally, where:

The flexible display panel further includes a buffer layer located between the electrostatic shielding layer and the flexible substrate;

The electrostatic shielding layer is directly disposed on a side of the buffer layer away from the flexible substrate.

Optionally, where:

The buffer layer is used to support or bond the electrostatic shielding layer.

Optionally, where:

In the normal direction of the plane where the flexible substrate is located, on the side of the electrostatic shielding layer close to the flexible substrate, there are first corrugated depressions corresponding to the first corrugated protrusions, and correspondingly Orthographic projections of the first wrinkle-shaped depressions and the first wrinkle-shaped protrusions on the plane where the flexible substrate is located overlap each other, and the depression direction of the first wrinkle-shaped depressions is far away from the flexible substrate. The buffer layer is in close contact with the first fold-shaped depression.

Optionally, where:

A part of the electrostatic shielding layer away from the flexible substrate outside the bending area of the flexible display panel has a second wrinkle-like structure, and the second wrinkle-like structure includes a plurality of second wrinkle-like protrusions;

The second corrugated protrusions are identical to the first corrugated protrusions;

said second corrugated structure is identical to said first corrugated structure;

The side of the electrostatic shielding layer away from the flexible substrate as a whole has a first wrinkled structure;

In the normal direction of the plane where the flexible substrate is located, on the side of the electrostatic shielding layer close to the flexible substrate, there are second wrinkle-shaped depressions corresponding to the second wrinkle-shaped protrusions, and correspondingly The second wrinkle-shaped depression and the orthographic projection of the second wrinkle-shaped protrusion on the plane where the flexible substrate is located overlap each other, the depression direction of the second wrinkle-shaped depression is far away from the flexible substrate, and the The buffer layer is in close contact with the second wrinkle-shaped depression, and the second wrinkle-shaped depression is the same as the first wrinkle-shaped depression.

Optionally, where:

The first wrinkle-shaped depression and the first wrinkle-shaped protrusion have the same cross-sectional shape in at least one same plane.

Optionally, where:

The first wrinkle-shaped depression and the first wrinkle-shaped protrusion have the same cross-sectional shape in any same plane.

Optionally, where:

When the electrostatic shielding layer is divided into several sub-electrostatic shielding layers of unit size along a direction perpendicular to the plane where the flexible substrate is located, the average thickness of each of the sub-electrostatic shielding layers is the same.

Optionally, where:

The buffer layer includes a heat-curable organic material or a photo-curable organic material.

In a second aspect, the present application further provides a flexible display device, including the flexible display panel in the present application.

In this application, the side of the electrostatic shielding layer away from the flexible substrate is designed at least in the bending area of the flexible display panel as a first wrinkle-like structure, and the first wrinkle-like structure includes at least one first wrinkle-like protrusion, and each first The protruding direction of the wrinkle-shaped protrusion is away from the flexible substrate. When the bending area of the flexible display panel is bent, the electrostatic shielding layer in the wrinkled structure located in the bending area of the flexible display panel will be subjected to an external bending force, because the first wrinkled structure on the electrostatic shielding layer includes The protruding direction of the first wrinkle-shaped protrusion is away from the flexible substrate. When the electrostatic shielding layer is subjected to a bending force that tends to stretch, the first wrinkle-shaped protrusion will deform from a wrinkled shape to a flat shape, so The external bending force on the electrostatic shielding layer is transferred, and the stress on the electrostatic shielding layer itself is released at the same time, which is equivalent to reducing the actual bending external force on the entire electrostatic shielding layer and the flexible display panel. The stress generated during the bending process of the electrostatic shielding layer and the flexible display panel is reduced, so it is beneficial to avoid the electrostatic shielding layer from being broken during the bending process, and at the same time, it can also prevent the flexible display components on the flexible display panel from being damaged. In addition, when the electrostatic shielding layer is subjected to a bending force that tends to compress, the bending force will act on the first wrinkle-shaped protrusions, causing them to undergo compression deformation, making the shape of the first wrinkle-like protrusions more obvious, and In the above process, the external bending force on the electrostatic shielding layer can also be transferred, and at the same time, the stress on the electrostatic shielding layer itself can be released. The force generated by the deformation of a wrinkle-shaped protrusion will not cause damage to the flexible substrate. Therefore, when the electrostatic shielding layer is subjected to a bending force that makes the electrostatic shielding layer compressive, the wrinkle-shaped structure design on the electrostatic shielding layer can still be in a certain degree. To a certain extent, the ability of the flexible display panel to resist the bending external force that makes the electrostatic shielding layer have a tendency to compress is improved.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:

FIG. 1 is a first structural schematic diagram of a section of a flexible display panel provided by the present application;

Fig. 2 is a schematic diagram of a first vertical cross-section of a first wrinkled protrusion in Fig. 1;

Fig. 3 is a second structural schematic diagram of a section of a flexible display panel provided by the present application;

Fig. 4 is a first vertical cross-sectional schematic view of the first wrinkled protrusion in Fig. 3;

FIG. 5 is a schematic diagram of a third structure of a section of a flexible display panel provided by the present application;

Fig. 6 is a top view of the first wrinkled protrusion on the electrostatic shielding layer in the present application;

Fig. 7 is an A-A sectional view of the first wrinkled protrusion shown in Fig. 6;

Fig. 8 is another top view of the first wrinkled protrusion on the electrostatic shielding layer in the present application;

Fig. 9 is a first type B-B sectional view of the first wrinkled protrusion shown in Fig. 8;

Fig. 10 is a second B-B sectional view of the first wrinkled protrusion shown in Fig. 8;

Fig. 11 is another top view of the first wrinkled protrusion on the electrostatic shielding layer in the present application;

Fig. 12 is a schematic diagram of dividing the electrostatic shielding layer in Fig. 11 into several sub-electrostatic shielding layers of unit size;

FIG. 13 is a schematic diagram of a fourth structure of a section of a flexible display panel provided by the present application;

Fig. 14 is a top view of the bending area and the first notch in the flexible display panel provided by the present application;

Fig. 15 is another top view of the bending area and the first notch in the flexible display panel provided by the present application;

FIG. 16 is a schematic diagram of a fifth structure of a section of a flexible display panel provided by the present application;

Fig. 17 is a schematic diagram of the sixth structure of the cross-section of the flexible display panel provided by the present application;

FIG. 18 is a schematic diagram of the seventh structure of the cross-section of the flexible display panel provided by the present application;

FIG. 19 is a schematic diagram of an eighth structure of a section of a flexible display panel provided by the present application;

Fig. 20 is a top view of the flexible display panel shown in Fig. 19;

FIG. 21 is a schematic structural view of a flexible display device provided by the present application.

detailed description

Certain terms are used, for example, in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. In addition, the term "coupled" herein includes any direct and indirect electrical coupling means. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically coupled to the second device, or indirectly electrically coupled through other devices or coupling means. connected to the second device. The subsequent description of the specification is a preferred implementation mode for implementing the application, but the description is for the purpose of illustrating the general principle of the application, and is not intended to limit the scope of the application. The scope of protection of the present application should be defined by the appended claims.

FIG. 1 is a first structural schematic diagram of a section of a flexible display panel provided by the present application. As shown in FIG. 1 , the flexible display panel 100 includes:

flexible substrate 10;

a flexible display component 20 located on the first surface 11 of the flexible substrate 10; and

An electrostatic shielding layer 30 located on the second surface 12 of the flexible substrate 10, the first surface 11 is opposite to the second surface 12, the side of the electrostatic shielding layer 30 away from the flexible substrate 10 is at least located on the The part of the bending area 80 of the flexible display panel 100 is a first wrinkle-like structure 40, the first wrinkle-like structure 40 includes at least one first wrinkle-like protrusion 41, and the protrusion of the first wrinkle-like protrusion 41 The direction is away from the flexible substrate 10 .

Specifically, the flexible display panel 100 usually includes a bending area 80. When bending the flexible display panel 100, the bending area 80 is often bent. The bending area mentioned in this application refers to when the flexible display panel When bending, the area where the bending axis is located, the bending area 80 corresponding to different products is not the same. As shown in FIG. 1 , the bending region 80 of the flexible display panel 100 may be located in the middle of the flexible display panel 100 . In the flexible display panel 100 , usually the flexible display component 20 (ie, the functional component for display) is placed on the first surface 11 of the flexible substrate 10 , and the electrostatic shielding layer 30 is placed on the second surface 12 of the flexible substrate 10 . In the present application, the side of the electrostatic shielding layer 30 away from the flexible substrate 10 is designed at least at the bending area 80 of the flexible display panel 100 as a first wrinkle-like structure 40, which includes at least one first wrinkle-like protrusion. 41 , and the protruding direction of each first wrinkle-shaped protrusion 41 is away from the flexible substrate 10 . When the bending region 80 of the flexible display panel 100 is bent, the electrostatic shielding layer 30 in a wrinkled structure located at the bending region 80 of the flexible display panel 100 will be subjected to an external bending force, because the first electrostatic shielding layer 30 on the electrostatic shielding layer 30 A corrugated structure 40 includes first corrugated protrusions 41 whose protruding direction faces away from the flexible substrate 10. When subjected to an external bending force that makes the electrostatic shielding layer 30 tend to stretch, the first corrugated protrusions 41 will deformation, from wrinkled to flat, so that the bending external force on the electrostatic shielding layer 30 is transferred, and at the same time, the stress on the electrostatic shielding layer itself is released, which is equivalent to reducing the electrostatic shielding layer 30 as a whole and The external bending force actually received by the flexible display panel 100 also reduces the stress generated by the electrostatic shielding layer and the flexible display panel itself during the bending process, so it is beneficial to avoid the electrostatic shielding layer 30 from breaking during the bending process, and at the same time Damage to the flexible display component 20 on the flexible display panel 100 can also be avoided. In addition, when the electrostatic shielding layer 30 is subjected to a bending force that tends to compress, the bending force will act on the first wrinkled protrusion 41, causing it to compress and deform, making the shape of the first wrinkled protrusion more obvious. , and the above process can also transfer the external bending force received by the electrostatic shielding layer 30, and at the same time release the stress received by the electrostatic shielding layer 30 itself, but the magnitude of the external bending force that causes the electrostatic shielding layer 30 to compress It should be able to ensure that the force generated by the deformation of the first wrinkled protrusion 41 will not cause damage to the flexible substrate 10. Therefore, when the electrostatic shielding layer 30 is subjected to a bending force that makes the electrostatic shielding layer 30 compressive, the force on the electrostatic shielding layer 30 will not be damaged. The wrinkle-like structure design can also improve the ability of the flexible display panel to resist the bending external force that makes the electrostatic shielding layer compressive to a certain extent.

FIG. 2 is a schematic diagram of a first vertical cross-section of the first wrinkled protrusion in FIG. 1 . Combining FIG. 1 and FIG. 2 , the first wrinkled structure 40 on the electrostatic shielding layer 30 includes a first wrinkled protrusion 41 . A wrinkle-shaped protrusion 41 has at least one first vertical section 45 in the shape of a sharp angle, and the normal direction of the first vertical section 45 is parallel to the plane where the flexible substrate 10 is located. The vertical section in the present application refers to a section parallel to the planes where multiple external forces that cause the flexible display panel 100 to bend are located when the flexible display panel 100 is bent. Fig. 3 is a schematic diagram of the second structure of the section of the flexible display panel provided by the present application, Fig. 4 is a schematic diagram of the first vertical section of the first wrinkled protrusion in Fig. 3, in the embodiment shown in Fig. 3 and Fig. 4, The first corrugated structure 40 on the electrostatic shielding layer 30 includes two first corrugated protrusions 41 , each of the first corrugated protrusions 41 has at least one first vertical section 46 in the shape of an arc. In the embodiment shown in Fig. 1-Fig. 4, when subjected to the bending external force that makes the electrostatic shielding layer have a tendency to stretch, the pointed or arc-shaped first wrinkle-shaped protrusions 41 can all be deformed. shape to a flat shape, so that the bending external force on the electrostatic shielding layer 30 can be transferred, and at the same time, the stress on the electrostatic shielding layer itself can be released, which is equivalent to reducing the actual stress on the entire electrostatic shielding layer and the flexible display panel. At the same time, it also reduces the stress generated by the electrostatic shielding layer and the flexible display panel during the bending process, so it is beneficial for the electrostatic shielding layer to break during the bending process of the surface, and it can also avoid damage to the flexible display panel. Damage to the flexible display unit. In addition, when the electrostatic shielding layer is subjected to a bending force that tends to compress, the bending force will act on the pointed or arc-shaped first wrinkle-shaped protrusion 41, causing it to compress and deform, making the pointed-shaped Or the shape of the arc-shaped first wrinkled protrusion is more obvious, and the bending external force received by the electrostatic shielding layer 30 can also be transferred in the above process, and the stress received by the electrostatic shielding layer itself can be released at the same time, but the above-mentioned The magnitude of the bending external force that makes the electrostatic shielding layer have a compressive tendency should ensure that the force generated by the deformation of the first wrinkled protrusion 41 will not cause damage to the flexible substrate. Therefore, when the electrostatic shielding layer has a compressive tendency When the external force is bent, the design of the pointed or arc-shaped first wrinkle-shaped protrusion 41 on the electrostatic shielding layer can also improve to a certain extent the ability of the flexible display panel to resist the bending external force that makes the electrostatic shielding layer compressive. ability.

However, when the first corrugated structure 40 on the electrostatic shielding layer 30 includes a plurality of first corrugated protrusions 41, each of the first corrugated protrusions The protrusions 41 can all be deformed, from wrinkled to flat, so the multiple first wrinkled protrusions 41 work together to further transfer the bending external force on the electrostatic shielding layer, and at the same time, the electrostatic shielding layer itself is subjected to The stress is released, and the joint action of multiple first wrinkled protrusions can fully release the stress generated when the electrostatic shielding layer and the flexible display panel are bent, effectively avoiding the possibility of the electrostatic shielding layer 30 being broken, and at the same time It also effectively avoids the possibility of the flexible display component 20 being damaged. When the first corrugated structure 40 on the electrostatic shielding layer 30 includes a plurality of first corrugated protrusions 41, when the electrostatic shielding layer is subjected to a bending force that tends to compress, the bending force will simultaneously act on multiple A first wrinkle-shaped protrusion 41, a plurality of first wrinkle-shaped protrusions 41 undergo compression deformation at the same time, each first wrinkle-shaped protrusion has a more obvious convex shape, this process can further reduce the bending of the electrostatic shielding layer 30 At the same time, the stress on the electrostatic shielding layer itself can be further released, but the magnitude of the above-mentioned bending external force that makes the electrostatic shielding layer have a tendency to compress should be able to ensure that the deformation of the multiple first wrinkled protrusions The force will not cause damage to the flexible substrate. Therefore, when the electrostatic shielding layer is subjected to a bending force that tends to compress, the design of the first plurality of wrinkled protrusions on the electrostatic shielding layer can further improve the resistance of the flexible display panel to static electricity. The shielding layer has the ability to compress the bending force of the tendency. Therefore, the design of the first corrugated structure 40 on the electrostatic shielding layer 30 including a plurality of first corrugated protrusions 41 has a more obvious effect of reducing the external bending force. In the embodiment shown in FIG. 1 and FIG. 2 , the first corrugated structure 40 on the electrostatic shielding layer 30 is located at a part corresponding to the bending area 80 of the flexible display panel 100 .

Optionally, in the embodiment shown in FIG. 2 and FIG. 4 , the structure of the first vertical section of the first wrinkled protrusion 41 includes: a first crest point 42 and two first trough points 43, the same first The horizontal distance between two first trough points 43 in the wrinkled protrusion 41 is 1 μm≤d ₁ ≤1cm, and the distance between the first crest point 42 and the first trough point 43 in the same first wrinkled protrusion 41 The vertical distance between them is 0.5 μm≤h ₁ ≤5mm. Since the protruding direction of the first wrinkle-shaped protrusion 41 on the electrostatic shielding layer is away from the flexible substrate, when the flexible display panel is subjected to a bending external force that makes the electrostatic shielding layer stretch and the bending area is bent, the first The wrinkled protrusions will be deformed from wrinkled to flat. The wrinkled protrusions will transfer the external bending force on the electrostatic shielding layer and release the stress on the electrostatic shielding layer itself. When the first The horizontal distance between the two first trough points 43 in the first vertical section of the wrinkled protrusion 41 is set to 1 μm≤d ₁ ≤1cm, and the distance between the first crest point 42 and the first trough point 43 The vertical distance is set to 0.5 μm≤h ₁ ≤5mm, the single first wrinkled protrusion 41 can well transfer the external bending force received by the electrostatic shielding layer during the process of deformation from wrinkled to flat, and can The stress on the electrostatic shielding layer itself is well released, which is equivalent to reducing the actual bending stress on the electrostatic shielding layer and the flexible display panel, and at the same time reducing the bending stress of the electrostatic shielding layer and the flexible display panel during the bending process. The generated stress is beneficial to avoid the electrostatic shielding layer from breaking during the bending process, and also avoids the possibility of damage to the flexible display components on the flexible display panel. When the flexible display panel is subjected to a bending force that tends to compress the electrostatic shielding layer and the bending area is bent, the first wrinkle-shaped protrusions will undergo compression deformation, making their protrusions more obvious, and the above process In the same way, the external bending force on the electrostatic shielding layer can be transferred, and at the same time, the stress on the electrostatic shielding layer can be released. When the two first troughs in the first vertical section of the first wrinkled protrusion 41 When the horizontal distance between the points 43 is set to 1 μm≤d ₁ ≤1cm, and the vertical distance between the first peak point 42 and the first wave valley point 43 is set to 0.5μm≤h ₁ ≤5mm, it can be achieved to a certain extent It reduces the force generated by the single first wrinkle-shaped protrusion 41 on the flexible substrate during the deformation process, avoids damage to the flexible substrate caused by excessive force, and at the same time helps to improve the resistance of the flexible display panel so that the electrostatic shielding layer has The ability to bend external forces that compress the tendency.

Optionally, as shown in FIG. 5, FIG. 5 is a third structural schematic diagram of a cross-section of the flexible display panel provided in this application. The part other than the bending area 80 is a second wrinkle-like structure 50 , and the second wrinkle-like structure 50 includes a plurality of second wrinkle-like protrusions 51 . The embodiment shown in FIG. 1 and FIG. 3 only designs the first corrugated structure 40 in the part where the electrostatic shielding layer 30 is located in the bending area 80 of the flexible display panel 100, and the side of the electrostatic shielding layer 30 away from the flexible substrate 10 is located in the flexible display panel 100. Parts other than the bending area 80 are flat. Compared with the embodiment shown in FIG. 1 and FIG. 3 , the embodiment shown in FIG. 5 except that the first corrugated structure 40 is designed at the part of the electrostatic shielding layer 30 located at the bending region 80 of the flexible display panel 100, the electrostatic shielding layer 30 deviates from A part of one side of the flexible substrate 10 outside the bending area 80 of the flexible display panel 100 also has a second wrinkle-like structure 50 , and the second wrinkle-like structure 50 includes a plurality of second wrinkle-like protrusions 51 . The electrostatic shielding layer 30 adopts the construction method of the embodiment shown in FIG. 5 , and when the flexible display panel 100 is bent by the bending external force that makes the electrostatic shielding layer have a tendency to stretch, it is located at the first bending area 80 of the flexible display panel 100 . When a wrinkled structure 40 deforms to transfer the external bending force on the electrostatic shielding layer and release the stress on the electrostatic shielding layer 30 itself, the second wrinkled structure 50 located outside the bending area 80 of the flexible display panel 100 Deformation will also occur to transfer the bending external force on the electrostatic shielding layer 30 and release the stress on the electrostatic shielding layer 30 itself. The first wrinkled structure 40 and the second wrinkled structure 50 act at the same time to further reduce the static electricity. The external force received by the shielding layer 30 and the flexible display panel 100 during the bending process also further reduces the stress generated by the electrostatic shielding layer 30 and the flexible display panel 100 during the bending process, thus preventing the electrostatic shielding layer 30 from being broken possibility, and at the same time avoid the phenomenon that the flexible display component 20 on the flexible display panel 100 is damaged, and ensure that the flexible display panel 100 can work normally. In addition, the electrostatic shielding layer 30 adopts the structure of the embodiment shown in FIG. 5 . When the flexible display panel 100 is bent by an external bending force that makes the electrostatic shielding layer compressive, the first corrugated structure 40 Both the wrinkled protrusions 41 and the second wrinkled protrusions 42 in the second wrinkled structure will undergo compression deformation, making the convex shapes of the first wrinkled protrusions 41 and the second wrinkled protrusions 42 more obvious. The process can transfer the external bending force received by the electrostatic shielding layer, and at the same time release the stress received by the electrostatic shielding layer itself. The force generated by the deformation will not cause damage to the flexible substrate. Therefore, when the electrostatic shielding layer is subjected to a bending force that tends to compress, the first corrugated protrusions in the first corrugated structure 40 on the electrostatic shielding layer The design of the protrusion 41 and the second wrinkle-shaped protrusion 51 in the second wrinkle-like structure 50 can also improve the ability of the flexible display panel to resist the bending external force that makes the electrostatic shielding layer have a tendency to compress to a certain extent.

Optionally, the second wrinkled protrusion 51 in the embodiment shown in FIG. 5 is the same as the first wrinkled protrusion 41 located in the bending region 80; the second wrinkled structure 50 is the same as the first wrinkled structure 40 ; The side of the electrostatic shielding layer 30 facing away from the flexible substrate 10 is in the form of a first wrinkled structure 40 as a whole. The second wrinkled protrusion 51 mentioned in this application is the same as the first wrinkled protrusion 41, and the second wrinkled structure 50 is the same as the first wrinkled structure 40, which means that the second wrinkled structure located outside the bending area 80 The spatial distribution of the second wrinkled protrusions 51 included in the structure 50 is the same as that of the first wrinkled protrusions 41 located in the bending area 80 , and the second wrinkled protrusions 51 are similar to the first wrinkled protrusions 41 The starting direction, the positional relationship and the size between the crest point and the trough point are exactly the same, so that the side of the electrostatic shielding layer 30 facing away from the flexible substrate 10 as a whole forms a first wrinkled structure 40 . In this application, the design of the second wrinkled structure 50 and the first wrinkled structure 40 are the same, and the fabrication of the first wrinkled structure 40 and the second wrinkled structure 50 can be completed at one time without the need for the first wrinkled structure 40 and the second wrinkled structure. The two pleated structures 50 are manufactured separately, which is convenient for production and helps to simplify the production process. In the embodiment shown in FIG. 5 , it is equivalent to designing the side of the electrostatic shielding layer 30 facing away from the flexible substrate 10 as a first corrugated structure 40 , and the first corrugated structure 40 includes several first corrugated protrusions 41 , and the protruding direction of each first wrinkle-shaped protrusion 41 is away from the flexible substrate 10 . When the flexible display panel 100 is bent by an external bending force that tends to stretch the electrostatic shielding layer, each first wrinkle-shaped protrusion 41 on the electrostatic shielding layer 30 will be deformed, from wrinkled to flat. In this way, the bending external force received by the electrostatic shielding layer can be transferred, and the stress received by the electrostatic shielding layer can also be released at the same time. The multiple first wrinkle-shaped protrusions 41 work together, which is equivalent to further reducing the static electricity. The external bending force actually received by the shielding layer 30 and the flexible display panel 100 also reduces the stress generated by the electrostatic shielding layer 30 and the flexible display panel 100 during the bending process, so it is more conducive to avoiding static electricity during the bending process. Breakage of the shielding layer is also more conducive to avoiding damage to the flexible display components on the flexible display panel. In addition, when the flexible display panel 100 is bent by an external bending force that tends to compress the electrostatic shielding layer, each first wrinkle-shaped protrusion 41 on the electrostatic shielding layer 30 will undergo compression deformation, so that each The protruding shape of the first wrinkle-shaped protrusion 41 is more obvious. This process can further transfer the bending external force on the electrostatic shielding layer, and can further release the stress on the electrostatic shielding layer itself. The above-mentioned makes the electrostatic shielding layer have The magnitude of the bending external force of the compressive tendency should ensure that the force generated by the deformation of the first wrinkled protrusion will not damage the flexible substrate. Therefore, when subjected to the bending external force that makes the electrostatic shielding layer compressive, the static electricity The overall design of the first wrinkled structure 40 of the shielding layer can also improve to a certain extent the ability of the flexible display panel to resist the external bending force that makes the electrostatic shielding layer compressive.

Optionally, as shown in FIG. 6, FIG. 6 is a top view of the first wrinkled protrusion on the electrostatic shielding layer in the present application, and FIG. 7 is an A-A sectional view of the first wrinkled protrusion shown in FIG. 6, It can be seen from FIG. 6 and FIG. 7 that the first wrinkled protrusions 41 are strip-shaped protrusions, which are arranged along the first direction and extend along the second direction; wherein the first direction intersects the second direction , and are respectively perpendicular to the normal direction of the plane where the flexible substrate 10 is located. The first wrinkle-shaped protrusion 41 is designed as a strip structure. When subjected to the bending external force that makes the electrostatic shielding layer have a tendency to stretch, since the protrusion direction of the strip-shaped protrusion is away from the flexible substrate, the strip-shaped protrusion is subjected to When the external force is bent, deformation will occur, from wrinkled to flat. In this way, the bending external force on the electrostatic shielding layer is transferred from point to surface, and at the same time, the stress on the electrostatic shielding layer itself is released, which is equivalent to It further reduces the actual bending external force on the electrostatic shielding layer and the flexible display panel, and also reduces the stress generated during the bending process of the electrostatic shielding layer and the flexible display panel, which is more conducive to avoiding the bending process during the bending process. The breakage of the electrostatic shielding layer is also beneficial to avoid damage to the flexible display components on the flexible display panel. In addition, the first wrinkled protrusion 41 is designed as a strip structure. When the electrostatic shielding layer is subjected to a bending external force that tends to compress, the bending external force acts on the first wrinkled protrusion 41, so that the wrinkled shape of the strip structure The protrusion 41 is compressed and deformed to make the protrusion shape more obvious. This process can also transfer the bending external force on the electrostatic shielding layer from point to surface, and at the same time release the stress on the electrostatic shielding layer itself. However, the magnitude of the above-mentioned bending external force that makes the electrostatic shielding layer have a compressive tendency should ensure that the force generated by the deformation of the first wrinkled protrusion 41 of the strip structure will not cause damage to the flexible substrate. When the shielding layer has a bending external force that tends to compress, the design of the strip-shaped first wrinkle-like protrusions 41 on the electrostatic shielding layer can also improve the resistance of the flexible display panel to a certain extent to the bending that makes the electrostatic shielding layer have a compressive tendency. The ability of external forces.

Optionally, in the embodiments shown in FIG. 6 and FIG. 7 , the strip-shaped protrusions are arranged continuously along the first direction. When the flexible display panel 100 is subjected to bending external force, the multiple strip-shaped protrusions arranged continuously are deformed, from wrinkled to flat deformation, and the multiple strip-shaped protrusions arranged continuously work together to affect the electrostatic shielding layer. The bending external force is transferred from point to surface, so the bending external force on the electrostatic shielding layer can be further transferred, and the stress on the electrostatic shielding layer itself can be released, thereby greatly reducing the overall electrostatic shielding layer. The external bending force actually received by the flexible display panel also greatly reduces the stress generated by the electrostatic shielding layer and the flexible display panel during the bending process, and the continuous arrangement design can make the bending of the flexible display panel 100 more convenient and more It is beneficial to prevent the electrostatic shielding layer from being broken during the bending process, and is also beneficial to avoiding damage to the flexible components on the flexible display panel during the bending process.

Optionally, as shown in FIG. 8 , which is another top view of the first wrinkled protrusions on the electrostatic shielding layer in the present application, the first wrinkled protrusions 41 are package-shaped protrusions 48 , and each The orthographic projection of a wrinkle-shaped protrusion 41 on the flexible substrate 10 is circular, and a plurality of bag-shaped protrusions 48 are scattered and arranged on the side of the electrostatic shielding layer 30 away from the flexible substrate 10 . In the embodiment shown in Figure 8, the orthographic projection of each first wrinkled protrusion 41 on the flexible substrate 10 is circular. It can also be oval, which is not specifically limited in the present application. The shape of the package-shaped protrusion 48 in the present application can be understood as hemispherical or semi-hemispherical. Fig. 9 is the first type B-B sectional view of the first wrinkled protrusion shown in Fig. 8, and Fig. 10 is the second type B-B sectional view of the first wrinkled protrusion shown in Fig. The section of the protrusion is arc-shaped, and the section of the package-shaped protrusion in the embodiment shown in Fig. 10 is pointed. In the embodiment shown in FIG. 8 , a plurality of package-shaped protrusions 48 are scattered and arranged on the side of the electrostatic shielding layer 30 away from the flexible substrate 10 , and the protruding direction of each package-shaped protrusion 48 is away from the flexible substrate 10 . When the flexible display panel 100 is bent by the bending external force that makes the electrostatic shielding layer have a tendency to stretch, each of the package-shaped protrusions 48 dispersedly arranged on the electrostatic shielding layer 30 will be deformed, and the dispersedly arranged The bag-shaped protrusion 48 is especially suitable for the situation that the bending external force has multiple bending axes. When the flexible display panel is subjected to the bending external force that makes the electrostatic shielding layer have a tendency to stretch and has multiple bending axes, the bag-shaped protrusion 48 The riser 48 can deform from wrinkled to flat in different directions, so as to transfer the external bending force on the electrostatic shielding layer and the flexible display panel, and at the same time release the stress on the electrostatic shielding layer and the flexible display panel, so It is beneficial to prevent the electrostatic shielding layer from being broken during the bending process, and is also beneficial to avoiding damage to the flexible display components on the flexible display panel. In addition, when the flexible display panel 100 is bent by an external bending force that tends to stretch the electrostatic shielding layer, each package-shaped protrusion 48 dispersedly arranged on the electrostatic shielding layer 30 will undergo compression deformation, and, The scattered package-shaped protrusions 48 are especially suitable for the case where the external bending force has multiple bending axes. The bag-shaped protrusion 48 can shrink in different directions, so that the direction of the bag-shaped protrusion 48 is more obvious. This process can also transfer the bending external force received by the electrostatic shielding layer, and at the same time, it can protect the electrostatic shielding layer itself. However, the magnitude of the above-mentioned bending external force that makes the electrostatic shielding layer have a compressive tendency should ensure that the force generated by the deformation of the bag-shaped protrusion 48 will not cause damage to the flexible substrate. Therefore, when the electrostatic shielding layer is subjected to When the layer has a bending force that tends to compress, the design of the package-shaped protrusions 48 on the electrostatic shielding layer can also improve the ability of the flexible display panel to resist the bending force that makes the electrostatic shielding layer compress.

Optionally, the bag-shaped protrusions in the present application are arranged in a hexagonal close-packed or square grid on the side of the electrostatic shielding layer 30 away from the flexible substrate 10 . In the embodiment shown in FIG. 8 , the package-shaped protrusions 48 are arranged in a hexagonal close-packed manner on the side of the electrostatic shielding layer 30 away from the flexible substrate 10 . FIG. 11 is another top view of the first wrinkle-shaped protrusions on the electrostatic shielding layer in the present application. As shown in FIG. 11 , the bag-shaped protrusions 48 are arranged in the form of a square grid on the electrostatic shielding layer 30 away from the flexible substrate 10 side. Regardless of whether the package-shaped protrusions 48 are arranged in the form of hexagonal close-packed or square lattice, each package-shaped protrusion 48 can Deformation occurs when subjected to an external bending force, from wrinkled to flat, so that the external bending force on the electrostatic shielding layer and the flexible display panel is transferred, and at the same time the stress on the electrostatic shielding layer and the flexible display panel is released, thereby avoiding After multiple times of bending, the external bending force causes damage to the electrostatic shielding layer or damage to the flexible display component. Regardless of whether the package-shaped protrusions 48 are arranged in the form of hexagonal close-packed or square lattice, each package-shaped protrusion 48 will be compressed when subjected to the bending external force that makes the electrostatic shielding layer have a tendency to compress. The deformation makes the convex shape more obvious. This process can also transfer the external bending force on the electrostatic shielding layer, and at the same time release the stress on the electrostatic shielding layer itself. The magnitude of the external bending force should ensure that the force generated by the deformation of the bag-shaped protrusion 48 will not damage the flexible substrate. Therefore, when the electrostatic shielding layer is subjected to a bending external force that makes the electrostatic shielding layer compressive, the bag-shaped The design of the protrusion 48 can also improve to a certain extent the ability of the flexible display panel to resist the bending force that makes the electrostatic shielding layer compress. FIG. 8 and FIG. 11 only show two arrangements of the bag-shaped protrusions 48 , and other arrangements can be used in addition to these two arrangements, which are not specifically limited in this application.

Optionally, as shown in FIG. 12, FIG. 12 is a schematic diagram of dividing the electrostatic shielding layer in FIG. 11 into several sub-electrostatic shielding layers of unit size. When divided into several sub-electrostatic shielding layers 30' in the direction of , the average thickness of each sub-electrostatic shielding layer 30' is the same. It should be noted that the unit size mentioned here should include at least one complete first wrinkled protrusion 41, that is to say, each sub-electrostatic shielding layer 30 should include at least one complete first wrinkled protrusion 41, for example In the embodiment shown in FIG. 12 , each sub-electrostatic shielding layer 30 ′ of a unit size includes a first wrinkle-shaped protrusion 41 . In the present application, the average thickness of each sub-electrostatic shielding layer 30 is designed to be the same, so that the overall thickness of the electrostatic shielding layer 30 can be kept uniform, and thus the thickness of the flexible display panel 100 can be kept uniform.

Optionally, the electrostatic shielding layer 30 in the present application is selected as an extensible conductive film layer, and the electrostatic shielding layer 30 may include copper, aluminum, silver, gold, copper nanowires, aluminum nanowires, silver nanowires, gold nanowires, One or more of conductive carbon nanotubes, graphene or graphite powder. These materials are all conductive materials, and the materials are relatively soft and resistant to bending. When the electrostatic shielding layer 30 is made of one or more of the above materials, it can maintain a good electromagnetic shielding effect and avoid external electromagnetic interference. It is convenient to make a wrinkled structure to transfer the external bending force and reduce the stress on the electrostatic shielding layer.

Optionally, as shown in FIG. 13 , FIG. 13 is a fourth structural schematic diagram of a section of the flexible display panel provided in the present application. The flexible display panel in the embodiment shown in Fig. 1, Fig. 3 and Fig. 5 does not include the first protective film, but the flexible display panel 100 in the embodiment shown in Fig. 13 also includes the first protective film 60, the first protective film The film 60 is located between the electrostatic shielding layer 30 and the flexible substrate 10 . The above-mentioned first protective film 60 is used to protect the flexible substrate 10 from external force damage in the environment of manufacture, inspection or use. For example, in the manufacturing process of the flexible display panel 100, a layer of first protective film 60 is pasted on the second surface 12 of the flexible substrate 10. In the subsequent production process, the first protective film 60 can protect the flexible substrate. 10 plays a very good protective role to avoid damage due to external forces in the subsequent production process.

Optionally, as shown in FIG. 13 , the first protective film 60 is a discontinuous structure, and the first protective film 60 has a first notch 61 at the bending area 80 of the flexible substrate 10 .

Specifically, the part of the bending area 80 of the flexible substrate 10 is embodied in the form of the first notch 61, and no protective film is designed. When the flexible display panel 100 is bent, if a protective film is also designed in the bending region 80 of the flexible substrate 10, the protective film located in the bending region 80 will increase the amount of time required to bend the flexible display panel 100. If the protective film is not designed in the bending area 80 of the flexible substrate 10 but the first notch 61 is used instead, compared with the case of a complete protective film, it is beneficial to reduce the required external force, thereby avoiding excessive bending. The bending force may cause damage to the flexible display component 20 .

Optionally, as shown in Figure 14 and Figure 15, Figure 14 is a top view of the bending area and the first notch in the flexible display panel provided by this application, and Figure 15 is a top view of the bending area in the flexible display panel provided by this application. In another top view of the folding area and the first notch, the orthographic projection of the bending area 80 of the flexible display panel 100 on the plane of the first protective film 60 is covered by the orthographic projection of the first notch 61 on the plane of the first protective film 60 . Specifically, referring to FIG. 14 , the area of the orthographic projection of the first notch 61 on the plane where the first protective film 60 is located is larger than the area of the orthographic projection of the bending region 80 on the plane where the first protective film 60 is located. Referring to FIG. 15 , the first The area of the orthographic projection of the notch 61 on the plane where the first protective film 60 is located is equal to the area of the orthographic projection of the bending region 80 on the plane where the first protective film 60 is located, that is, the first protective film 60 cannot be formed on the flexible display panel 100 The area where the bending area 80 is located. Such a design is beneficial to reduce the required external force compared with the case of a complete protective film, and the introduction of the first protective film can also protect the flexible substrate 10 from external force damage in the environment of manufacturing, testing or use.

Optionally, as shown in FIG. 16, FIG. 16 is a fifth structural schematic diagram of a section of the flexible display panel provided by the present application, and the flexible display panel in the embodiment shown in FIG. 1, FIG. 3 and FIG. 5 does not include The first protective film or the second protective film, the flexible display panel in the embodiment shown in Figure 13 includes a first protective film, the first protective film is located between the electrostatic shielding layer and the flexible substrate, and the The flexible display panel 100 further includes a second protective film 70 located on a side of the electrostatic shielding layer 30 away from the flexible substrate 10 , and the second protective film 70 covers the entire electrostatic shielding layer 30 . In this embodiment, the second protective film 70 is arranged on the surface of the electrostatic shielding layer 30 away from the flexible substrate 10, and the second protective film 70 covers the entire electrostatic shielding layer 30, so that the second protective film 70 is opposite to the electrostatic shielding layer 30, Both the flexible display component 20 and the flexible substrate 10 play a protective role. Specifically, the second protective film 70 can be used to protect the flexible substrate 10 from external force damage in the environment of manufacturing, testing or use, effectively preventing the flexible substrate 10 from being damaged by external forces in the environment of manufacturing, testing or use. A phenomenon that damage occurs affects the normal operation of the flexible display panel 100 .

Optionally, as shown in Figure 17, Figure 17 is a sixth structural schematic diagram of the cross-section of the flexible display panel provided by the present application, and the flexible display panels in the embodiments shown in Figure 1, Figure 3, and Figure 5 do not include buffer layer, and the flexible display panel 100 in the embodiment shown in FIG. 17 also includes a buffer layer 90, which is located between the electrostatic shielding layer 30 and the flexible substrate 10; One side of the flexible substrate 10, that is, in this embodiment, the electrostatic shielding layer 30 is in direct contact with the buffer layer 90. Optionally, the buffer layer 90 in the embodiment shown in FIG. 17 is used to support or bond the electrostatic shielding layer 30, so that the electrostatic shielding layer 30 can be well fixed on the second surface 12 of the flexible substrate 10 of the present application, The external electromagnetic interference is effectively shielded, so that the flexible display panel 100 in the present application does not appear screen flickering phenomenon caused by electromagnetic interference during the working process, and better display effect is obtained.

Optionally, as shown in FIG. 18 , which is a seventh structural schematic diagram of a cross-section of the flexible display panel provided by the present application, in the normal direction of the plane where the flexible substrate 10 is located, the electrostatic shielding layer 30 is close to the flexible display panel shown. On one side of the substrate 10, a first corrugated depression 32 is provided corresponding to the first corrugated protrusion 41, and the first corrugated recess 32 and the first corrugated protrusion 41 are correspondingly arranged on the flexible substrate 10. The orthographic projections of the planes overlap each other, the depression direction of the first wrinkled depression 32 is away from the flexible substrate 10 , and the buffer layer 90 is closely attached to the first wrinkled depression 32 . Referring to FIG. 18 , the form of the first wrinkled structure distributed on the electrostatic shielding layer 30 is similar to a combination of multiple sinusoidal images, corresponding to the first wrinkled protrusion 41 in the first wrinkled structure, on the electrostatic shielding layer 30 near the buffer layer 90 is provided with a first wrinkle-shaped depression 32, and each first wrinkle-shaped depression 32 corresponding to each first wrinkle-shaped protrusion 41 is filled by the buffer layer 90, so that the buffer layer 90 and The first wrinkle-shaped depressions 32 fit closely. In this embodiment, the buffer layer 90 is located between the flexible substrate 10 and the electrostatic shielding layer 30, and the side of the buffer layer 90 close to the electrostatic shielding layer 30 is closely attached to the electrostatic shielding layer 30, so that the electrostatic shielding layer 30 can be firmly fixed on the flexible substrate. on the substrate 10 to play the role of shielding external electromagnetic interference. In this embodiment, the electrostatic shielding layer 30 located at the bending area 80 of the flexible substrate 10 has a first corrugated structure 40, and the protruding direction of the first corrugated protrusions 41 in the first corrugated structure 40 is away from the flexible display. When the panel 100 is bent at the bending area 80 of the flexible display panel 100, for example, when the electrostatic shielding layer is subjected to a bending force that tends to stretch, the first wrinkle-shaped protrusions 41 located at the bending area 80 will Deformation occurs, from a wrinkled shape to a flat shape, so that the bending external force on the electrostatic shielding layer 30 and the flexible display panel 100 can be transferred, reducing the stress on the electrostatic shielding layer 30 and the flexible display panel 100, thereby reducing the The external force actually borne by the functional film layer of the electrostatic shielding layer 30 and the flexible display panel 100 can prevent the electrostatic shielding layer 30 from breaking, and also avoid damage to the flexible display component 20 on the flexible display panel 100; When the layer has a bending external force with a compressive tendency, the first wrinkle-shaped protrusion 41 located in the bending area 80 will undergo compression deformation, making the shape of the protrusion more obvious. The bending external force can be transferred, and at the same time, the stress on the electrostatic shielding layer 30 itself can be released, but the magnitude of the above-mentioned bending external force that makes the electrostatic shielding layer have a compressive tendency should be able to ensure the deformation of the first wrinkled protrusion 41. The force will not cause damage to the flexible substrate. Therefore, when the electrostatic shielding layer 30 is subjected to a bending force that tends to compress, the wrinkled structure design on the electrostatic shielding layer 30 can also improve the resistance of the flexible display panel to a certain extent. The shielding layer has the ability to compress the bending force of the tendency.

Optionally, as shown in FIG. 19 , which is an eighth structural schematic diagram of the cross-section of the flexible display panel provided by the present application, the side of the electrostatic shielding layer 30 away from the flexible substrate 10 is located at the bending area 80 of the flexible display panel 100 The other part is the second wrinkled structure 50, the second wrinkled structure 50 includes a plurality of second wrinkled protrusions 51; the second wrinkled protrusions 51 are the same as the first wrinkled protrusions 41; the second wrinkled structure 50 is the same as the first corrugated structure 40; the side of the electrostatic shielding layer 30 away from the flexible substrate 10 is the first corrugated structure 40 as a whole; in the normal direction of the plane where the flexible substrate 10 is located, the electrostatic shielding layer 30 is close to the flexible One side of the substrate 10 is provided with a second wrinkle-shaped depression 52 corresponding to the second wrinkle-shaped protrusion 51 , and the second wrinkle-shaped depression 52 and the second wrinkle-shaped protrusion 51 are arranged correspondingly on the flexible substrate 10 . The orthographic projections of the planes overlap each other, the depression direction of the second wrinkled depression 52 is away from the flexible substrate 10 , the buffer layer 90 is closely attached to the second wrinkled depression 52 , and the second wrinkled depression 52 is the same as the first wrinkled depression 32 . In the embodiment shown in Figure 19, the second wrinkled structure 50 is the same as the first wrinkled structure 40, the second wrinkled protrusion 51 is the same as the first wrinkled protrusion 41, and the second wrinkled depression 52 is the same as the first wrinkled structure. The wrinkled depressions 51 are the same, and the spatial distribution of the second wrinkled protrusions 51 and the second wrinkled depressions 52 in the second wrinkled structure is the same as that of the first wrinkled protrusions 41 and the first wrinkled structure 40 . The spatial distribution rules of the wrinkled depressions 32 are exactly the same, the protruding directions of the second wrinkled protrusions 51 and the first wrinkled protrusions 41, and the positional relationship and size between the peak points and the valley points are exactly the same, and the second wrinkled protrusions 41 are completely the same. The direction and size of the depressions 52 and the first wrinkled depressions 32 are exactly the same, so that the side of the electrostatic shielding layer 30 facing away from the flexible substrate 10 as a whole forms the first wrinkled structure 40, which is equivalent to the first wrinkled structure 40 on the side where the electrostatic shielding layer 30 faces away from the flexible substrate. The overall structure of one side of 10 is similar to a combination of multiple sinusoidal images, corresponding to the first wrinkled protrusions 41 in the first wrinkled structure, a first wrinkle is provided on the side of the electrostatic shielding layer 30 close to the buffer layer 90 Each first wrinkle-shaped depression 32 corresponding to each first wrinkle-shaped protrusion 41 is filled with the buffer layer 90 , so that the buffer layer 90 is closely attached to the first wrinkle-shaped depression 32 . In this embodiment, the buffer layer 90 is located between the electrostatic shielding layer 30 and the flexible substrate 10, and fills all the second wrinkled depressions 52 on the side of the electrostatic shielding layer 30 close to the flexible substrate 10, so that the electrostatic shielding layer 30 can be reliably fixed. on the flexible substrate 10 to play the role of shielding electromagnetic interference. In this embodiment, the side of the electrostatic shielding layer 30 facing away from the flexible substrate 10 has a first corrugated structure 40 as a whole, the first corrugated structure 40 includes a plurality of first corrugated protrusions 41 , and each second corrugated protrusion 52 Identical to the first corrugated protrusions 41, the direction of each first corrugated protrusion 41 is away from the flexible substrate 10. When the flexible display panel 100 is bent under the action of an external force, for example, the electrostatic shielding layer has a When the bending external force of stretching tendency, each first wrinkle-shaped protrusion 41 on the electrostatic shielding layer 30 will be deformed, from wrinkled to flat shape deformation, so the electrostatic shielding layer 30 and the flexible display panel 100 will be affected The bending external force is transferred to reduce the stress on the electrostatic shielding layer 30 and the flexible display panel 100, thereby reducing the actual external force and stress on the electrostatic shielding layer 30 and the flexible display component 20 to a large extent, effectively avoiding static electricity. The phenomenon that the shielding layer 30 is broken or the flexible display component 20 is damaged; when the electrostatic shielding layer is subjected to a bending force that tends to compress, the first wrinkle-shaped protrusion 41 located in the bending area 80 will undergo compression deformation, making it The convex shape is more obvious, and this process can also transfer the bending external force received by the electrostatic shielding layer 30, and at the same time release the stress received by the electrostatic shielding layer 30 itself, but the above-mentioned bending that makes the electrostatic shielding layer have a compression tendency The magnitude of the external force should ensure that the force generated by the deformation of the first wrinkled protrusion 41 will not cause damage to the flexible substrate. Therefore, when the electrostatic shielding layer 30 is subjected to a bending external force that makes the electrostatic shielding layer 30 compressive, the electrostatic shielding layer 30 The wrinkle-like structure design on the surface can also improve the ability of the flexible display panel to resist the bending external force that makes the electrostatic shielding layer have a tendency to compress to a certain extent.

Optionally, in the embodiment shown in FIG. 18 and FIG. 19 , the first wrinkle-shaped depression 32 and the first wrinkle-shaped protrusion 41 have the same cross-sectional shape in at least one same plane. The first wrinkled depression 32 and the first wrinkled protrusion 41 are designed to have the same cross-sectional shape in at least one same plane, then the first wrinkled protrusion 41 and the first wrinkled depression have certain similarities. It can facilitate the manufacture of the electrostatic shielding layer 30 to a certain extent.

Optionally, as a preferred manner, in the embodiment shown in Fig. 18 and Fig. 19, the first wrinkle-shaped depression 32 and the first wrinkle-shaped protrusion 41 have the same cross-sectional shape in any same plane, that is to say, the first The spatial distribution rules of a wrinkled depression 32 and the first wrinkled protrusion 41 are exactly the same, the concave direction of the first wrinkled depression 32 is exactly the same as the convex direction of the first wrinkled protrusion 41, and the first wrinkled depression The concave point of 32 coincides with the convex point (crest point) of the first wrinkled protrusion 41. That is to say, the shapes of the first wrinkle-shaped depressions 32 and the first wrinkle-like protrusions 41 are designed to be exactly the same structure, which is more convenient for production, helps simplify the production process, and improves the production efficiency of the flexible display panel 100 .

Optionally, FIG. 20 is a top view of the flexible display panel shown in FIG. 19. When the electrostatic shielding layer 30 is divided into several sub-electrostatic shielding layers 30' of unit size along the direction perpendicular to the plane where the flexible substrate 10 is located, each The average thickness of each electrostatic shielding layer 30' is the same. It should be noted that the unit size mentioned here should include at least one complete first wrinkled protrusion 41, that is to say, each sub-electrostatic shielding layer 30' should include at least one complete first wrinkled protrusion 41, In the embodiment shown in FIG. 20 , each sub-electrostatic shielding layer 30 ′ includes four complete first wrinkle-shaped protrusions 41 . In the present application, the average thickness of each sub-electrostatic shielding layer 30' is designed to be the same, so that the overall thickness of the electrostatic shielding layer 30 can be kept uniform, and thus the overall thickness of the flexible display panel 100 can be kept uniform.

Optionally, the buffer layer in this application includes heat-curable organic material or light-curable organic material. This application does not limit the specific constituent material of the buffer layer, as long as it can support or bond the electrostatic shielding layer. When the buffer layer is made of thermally cured organic material, after coating the thermally cured adhesive layer (i.e., the buffer layer), use a wave-shaped mold on the surface of the thermally cured adhesive to heat-press the electrostatic shielding film, and then place it on one side of the buffer layer The electrostatic shielding layer 30 is formed.

Optionally, FIG. 21 is a schematic structural diagram of a flexible display device of the present application. Based on the same inventive concept, the present application also provides a flexible display device 200 , as shown in FIG. 21 , which includes the above-mentioned flexible display panel 100 provided by the above-mentioned embodiments of the present application. The flexible display device 200 may be any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like. For the embodiment of the display device in this application, reference may be made to the above embodiment of the flexible display panel 100 , and repeated descriptions will not be repeated here.

The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various Various other combinations, modifications, and environments can be made within the scope of the inventive concept described herein, by the above teachings or by skill or knowledge in the relevant field. However, modifications and changes made by those skilled in the art do not depart from the spirit and scope of the present application, and should all be within the protection scope of the appended claims of the present application.

Claims (26)

1. a kind of flexible display panels, it is characterised in that the flexible display panels include：

Flexible base board；

Flexible Displays part on the flexible substrate first surface；And

Electrostatic screen layer on the flexible base board second surface, the first surface is relative with the second surface, institute It is in first that electrostatic screen layer, which is stated, away from the part that the side of the flexible base board is located at least in the flexible display panels bent area Fold-like structures, first fold-like structures include at least one first accordion projection, the first accordion projection Protrusion direction deviates from the flexible base board.

2. flexible display panels according to claim 1, it is characterised in that first accordion is raised at least to have one First vertical cross-section is in arc-shaped or tip-angled shape；

The normal direction of first vertical cross-section is parallel with plane where the flexible base board.

3. flexible display panels according to claim 2, it is characterised in that the structure of first vertical cross-section includes：One Individual first wave peak dot and two first wave valley points, described two first wave valley points during same first accordion is raised it Between 1 μm≤d of horizontal range₁≤ 1cm, the first wave peak dot and described first during same first accordion is raised 0.5 μm≤h of vertical range between trough point₁≤5mm。

4. flexible display panels according to claim 1, it is characterised in that the electrostatic screen layer deviates from the flexible base board Side be located at the flexible display panels bent area beyond part be in the second fold-like structures, second fold-like structures It is raised including multiple second accordions.

5. flexible display panels according to claim 4, it is characterised in that second accordion is raised with first pleat Corrugation projection is identical；

Second fold-like structures are identical with first fold-like structures；

The electrostatic screen layer is in integrally the first fold-like structures away from the side of the flexible base board.

6. the flexible display panels according to claim 1 or 5, it is characterised in that the first accordion projection is convex for strip Rise, the strip projected parts are arranged and extended in a second direction in the first direction；

The first direction intersects with the second direction, and the normal direction with plane where the flexible base board is hung down respectively Directly.

7. flexible display panels according to claim 6, it is characterised in that the strip projected parts are continuously arranged in the first direction Cloth.

8. the flexible display panels according to claim 1 or 5, it is characterised in that the first accordion projection is convex for bag-like Rise, multiple bag-like projections are scattered to be arranged in the side that the electrostatic screen layer deviates from the flexible base board.

9. flexible display panels according to claim 8, it is characterised in that the bag-like projection is with Hexagonal Close-packed or four directions The form of grid is arranged in the side that the electrostatic screen layer deviates from the flexible base board.

10. flexible display panels according to claim 5, it is characterised in that by electrostatic screen layer along perpendicular to described When the direction of plane where flexible base board is divided into the sub- electrostatic screen layer of several unit sizes, each sub- electrostatic screen The average thickness of layer is identical.

11. flexible display panels according to claim 1, it is characterised in that the electrostatic screen layer is extending conducting film Layer, the electrostatic screen layer includes copper, aluminium, silver, gold, copper nano-wire, aluminium nano wire, nano silver wire, nanowires of gold, conductivity type carbon One or more in nanotube, graphene or graphite powder.

12. flexible display panels according to claim 1, it is characterised in that the flexible display panels also include first and protected Cuticula, first diaphragm is located between electrostatic screen layer and the flexible base board.

13. the flexible display panels according to claim 12, it is characterised in that first diaphragm is used in manufacture, inspection The flexible base board is protected in the environment surveyed or used from the damage of external force.

14. the flexible display panels according to claim 12, it is characterised in that first diaphragm is a discontinuous knot Structure；

First diaphragm has the first breach in the flexible display panels bent area.

15. the flexible display panels according to claim 14, it is characterised in that the flexible display panels bent area is described The orthographic projection of plane is covered by the orthographic projection of first breach plane where first diaphragm where first diaphragm.

16. flexible display panels according to claim 1, it is characterised in that the flexible display panels also include second and protected Cuticula, second diaphragm is located at side of the electrostatic screen layer away from the flexible base board, and second diaphragm covers The whole electrostatic screen layer of lid.

17. the flexible display panels according to claim 16, it is characterised in that second diaphragm is used in manufacture, inspection The flexible base board is protected in the environment surveyed or used from the damage of external force.

18. flexible display panels according to claim 1, it is characterised in that the flexible display panels also include cushion, The cushion is located between electrostatic screen layer and the flexible base board；

The electrostatic screen layer is directly arranged at side of the cushion away from the flexible base board.

19. the flexible display panels according to claim 18, it is characterised in that the cushion is used to supporting or bonding institute State electrostatic screen layer.

20. the flexible display panels according to claim 18, it is characterised in that the normal of plane where the flexible base board On direction, the electrostatic screen layer is accordingly set close to the side of shown flexible base board with first accordion projection There is the first accordion depression, first accordion depression accordingly set is with first accordion projection described soft Property plane where substrate orthographic projection mutually overlap, the depression direction of first accordion depression away from the flexible base board, The cushion is brought into close contact with first accordion depression.

21. the flexible display panels according to claim 20, it is characterised in that the electrostatic screen layer deviates from the flexible base The part that the side of plate is located at beyond the flexible display panels bent area is in the second fold-like structures, the second accordion knot It is raised that structure includes multiple second accordions；

Second accordion is raised identical with the first accordion projection；

Second fold-like structures are identical with first fold-like structures；

The electrostatic screen layer is in integrally the first fold-like structures away from the side of the flexible base board；

Where the flexible base board in the normal direction of plane, the electrostatic screen layer close to the side of shown flexible base board, The second accordion depression, second accordion accordingly set are accordingly provided with second accordion projection The orthographic projection of depression and the raised plane where the flexible base board of second accordion is mutually overlapped, second accordion The depression direction of depression is away from the flexible base board, and the cushion is brought into close contact with second accordion depression, and described the Two accordions depression is identical with the first accordion depression.

22. the flexible display panels according to claim 20 or 21, it is characterised in that the first accordion depression with it is described First accordion projection is at least in an identical graphic memory in identical cross sectional shape.

23. the flexible display panels according to claim 21, it is characterised in that the first accordion depression and described first All there is identical cross sectional shape in any identical plane in accordion projection.

24. the flexible display panels according to claim 21, it is characterised in that by electrostatic screen layer along perpendicular to described When the direction of plane where flexible base board is divided into the sub- electrostatic screen layer of several unit sizes, each sub- electrostatic screen The average thickness of layer is identical.

25. the flexible display panels according to claim 18, it is characterised in that the cushion includes heat cure organic material Or Photocurable organic material.

26. a kind of flexible display apparatus, it is characterised in that including the Flexible Displays face as described in any one in claim 1-25 Plate.