CN113096531A

CN113096531A - Display panel

Info

Publication number: CN113096531A
Application number: CN202110311506.4A
Authority: CN
Inventors: 王恺君
Original assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-07-09
Anticipated expiration: 2041-03-24
Also published as: CN113096531B

Abstract

The invention provides a display panel, which comprises a substrate base plate, an inorganic layer arranged on the substrate base plate and a metal layer arranged on the inorganic layer; the inorganic layer comprises a barrier layer arranged on the substrate and an insulating layer arranged on the barrier layer; the metal layer comprises a plurality of metal wires; the inorganic layer is provided with an opening penetrating through the insulating layer in the bending area; an organic layer fills the opening. According to the invention, the barrier layer is arranged in the opening to prevent the corrosion of water and oxygen to the metal wiring, the organic layer is arranged in the opening to release stress, so that the crack is prevented from being diffused to the metal wiring, and the bending resistance of the display panel is improved.

Description

Display panel

Technical Field

The application relates to the technical field of display, in particular to a display panel.

Background

With the development of display technology, in order to implement a flexible display panel or a full-screen design, a bending region is usually required.

Fig. 1 is a schematic structural diagram of a display panel in the prior art, and as shown in fig. 1, the display panel sequentially includes, from bottom to top: the semiconductor device includes a substrate 20, an inorganic layer 30 and a metal layer 36, wherein the inorganic layer 30 is a stacked structure including a barrier layer 31, a buffer layer 33, a gate insulating layer 34 and an interlayer insulating layer 35; the display panel further comprises a bending area 10, when the display panel is bent in the bending area 10, the bending area 10 can bear over-concentrated stress, and due to the fact that the inorganic layer 30 of the bending area 10 is high in hardness, stress cannot be released, and the problems that all film layers of the inorganic layer 30 crack, peel off, misplace and the like occur. Moreover, when the display panel is bent, the metal traces in the metal layer 36 are easily broken or cracked due to the stress generated, and even extend to the display area, which affects the display quality of the display panel.

Therefore, a display panel is needed to solve the above problems.

Disclosure of Invention

The application provides a display panel to solve the technical problem that each rete of the unable release inorganic layer that leads to of buckling zone internal stress of prior art's display panel cracks and the crackle spreads to the metal easily and walks the line.

Based on the above technical problem, an embodiment of the present invention provides a display panel, including:

a substrate base plate;

an inorganic layer disposed on the base substrate; the inorganic layer includes a barrier layer disposed on the substrate, an insulating layer disposed on the barrier layer,

the metal layer is arranged on the inorganic layer and comprises a plurality of metal wires;

wherein, the inorganic layer is provided with an opening penetrating through the insulating layer in the bending area; an organic layer fills the opening.

According to the display module provided by the embodiment of the invention, the barrier layer is provided with a plurality of sub-openings arranged at intervals on one side of the opening area away from the substrate; the organic layer fills the sub-openings.

According to the display module provided by the embodiment of the invention, the plurality of sub openings comprise a plurality of first sub openings, and the first sub openings are arranged along the extending direction of the metal routing line.

According to the display module provided by the embodiment of the invention, the plurality of sub openings comprise a plurality of second sub openings, and the second sub openings are arranged along a direction perpendicular to the extending direction of the metal routing.

According to the display module provided by the embodiment of the invention, the orthographic projection of the second sub-opening on the substrate falls into the orthographic projection of the interval area of any two metal wires on the substrate.

According to the display module provided by the embodiment of the invention, the thickness of the barrier layer in the opening range is smaller than the thickness of the barrier layer outside the opening range.

According to the display module provided by the embodiment of the invention, the depth of the sub-opening is smaller than or equal to the thickness of the barrier layer within the opening range.

According to the display module provided by the embodiment of the invention, the thickness range of the barrier layer in the sub-opening is

To

The thickness range of the barrier layer between any two adjacent sub-openings is

To

。

According to the display module provided by the embodiment of the invention, the spacing distance between any two adjacent sub openings is greater than or equal to the width of the sub opening.

According to the display module provided by the embodiment of the invention, the interval distance between any two adjacent sub-openings ranges from 5 μm to 20 μm, and the width of each sub-opening ranges from 5 μm to 8 μm.

The invention has the beneficial effects that the invention provides the display panel, the opening penetrating through the insulating layer and arranged in the bending area is formed on the inorganic layer, the blocking layer and the organic layer are arranged in the opening, the blocking layer is formed with a plurality of sub-openings arranged at intervals on one side of the opening area, which is far away from the substrate, and the organic layer fills the sub-openings, so that the water and oxygen blocking effect can be ensured, the stress can be better released, the cracks can be prevented from being generated, and the organic layer in the sub-openings can further release the stress, and the cracks can be prevented from being diffused to the metal wiring. Therefore, the invention solves the problem of stress concentration when the display panel is bent, avoids the phenomena of cracking, peeling, dislocation and the like of each film layer of the display panel, simultaneously can prevent cracks from diffusing to the metal wires and prevent water and oxygen from corroding the metal wires, and ensures the normal display performance of the display panel.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required in the embodiments are briefly described below. The drawings in the following description are only some embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic diagram of a display panel according to the prior art;

fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a bending region according to an embodiment of the present invention;

FIG. 4 is a schematic top view of a bending region according to an embodiment of the present invention;

FIG. 5 is a schematic top view of another bending region provided in accordance with an embodiment of the present invention;

FIG. 6 is a schematic top view of another bending region according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of another bending region according to an embodiment of the present invention.

Detailed Description

Specific structural and functional details disclosed herein are merely representative and are provided for purposes of describing example embodiments of the present application. This application may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified. Furthermore, the term "comprises" and any variations thereof is intended to cover non-exclusive inclusions.

In the description of the present invention, it is to be understood that the terms "vertical", "extending", "parallel", "length", "width", "thickness", "upper", "lower", "vertical", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.

For the convenience of understanding the technical solutions of the present invention, the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The embodiment of the invention provides a display panel, which comprises a bending area, and the display panel also comprises: a substrate base plate; an inorganic layer disposed on the base substrate; the inorganic layer comprises a barrier layer arranged on the substrate and an insulating layer arranged on the barrier layer; a metal layer disposed on the inorganic layer, the metal layer including a plurality of metal traces (not shown); wherein, the inorganic layer is provided with an opening penetrating through the insulating layer in the bending area; an organic layer fills the opening.

In a specific embodiment, as shown in fig. 2, the display panel provided by the present invention is defined with a bending region 10 and a non-bending region 11, and the display panel 1 includes a substrate 20, an inorganic layer 30, and a metal layer 36, which are stacked. Specifically, the inorganic layer 30 is provided on the base substrate 20; the inorganic layer 30 includes a barrier layer 31 disposed on the substrate base plate 20, an insulating layer 32 disposed on the barrier layer 31; the metal layer 36 is disposed on the inorganic layer 30, and the metal layer 36 includes a plurality of metal traces; in the bending region 10, an opening 321 is formed in the inorganic layer 30 and penetrates through the insulating layer 32, and the opening 321 exposes the barrier layer 31; an organic layer 37 fills the opening 321, i.e., the organic layer 37 is formed between the barrier layer 31 and the metal layer 36.

As shown in fig. 2, in the embodiment of the present invention, the insulating layer 32 includes a buffer layer 33, a gate insulating layer 34, and an interlayer insulating layer 35, which are sequentially stacked. Specifically, the buffer layer 33 is disposed on the barrier layer 31; the gate insulating layer 34 is disposed on the buffer layer 33; the interlayer insulating layer 35 is provided on the gate insulating layer 34. In general, the buffer layer 33, the gate insulating layer 34, and the interlayer insulating layer 35 are made of an inorganic material, which may optionally include any one or a combination of silicon oxide, silicon nitride, and silicon oxynitride. The inorganic film layers such as the buffer layer 33, the gate insulating layer 34, and the interlayer insulating layer 35 are brittle materials, and although the fracture strength is high, the fracture toughness is very poor, so that the material is easily brittle when being bent, and the fundamental reasons are that: these inorganic materials do not have any significant energy dissipation mechanism other than dissipating energy in the form of increased surface energy of the crack, and thus, lead to rapid crack propagation that results in failure of the crack tip to passivate and cause continued stress concentration. When the display panel is bent in the bending region 10, the bending region 10 may bear too concentrated stress, and the inorganic layer 30 in the bending region 10 has high hardness, so that the stress cannot be released, and the film layers of the inorganic layer 30 may crack, peel off, and be dislocated.

In the embodiment of the invention, in the bending region 10, an opening 321 is formed on the inorganic layer 30 and penetrates through the insulating layer 32, and the opening 321 exposes the barrier layer 31; an organic layer 37 fills the opening 321, i.e., the organic layer 37 is formed between the barrier layer 31 and the metal layer 36, and the thicknesses of the organic layer 37 and the insulating layer 32 are equal. In the embodiment of the present invention, the opening 321 penetrating through the insulating layer 32 is provided to reduce the bending stress applied to the insulating layer 32 when the insulating layer is bent, and reduce the risk of bending failure. Compared with the conventional structure of the bending region 10, the organic layer as an organic material is introduced into the opening 321 penetrating through the insulating layer 32, and the flexibility of the display panel bending region 10 is effectively improved because the flexibility of the organic material is better than that of the inorganic material.

Alternatively, in a specific embodiment, the display panel provided by the present invention may be a flexible display panel, and the substrate 20 may be formed of any suitable insulating material having flexibility. For example, the base substrate 20 may be formed of a polymer material such as Polyimide (PI), Polycarbonate (PC), Polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), Polyarylate (PAR), or glass Fiber Reinforced Plastic (FRP).

In prior designs, the inflection regions 10 are typically excavated to increase the kink resistance. However, after the inorganic layer 30 is removed, the flexible substrate 20 of the flexible display panel and the organic layer 37 have poor water and oxygen permeation resistance, which easily causes the metal trace above the bending region 10 to be oxidized, resulting in the failure of the metal trace. The organic layer 37 for relieving bending stress is arranged in the bending region 10, so that the problems of cracking, peeling, dislocation and the like of each film layer in the display panel caused by over-concentrated stress borne by the bending region 10 during bending can be avoided, but the corresponding water and oxygen blocking capability of the organic layer 37 is weaker, so that a channel for water and oxygen intrusion is easily formed, and the problems of poor products and the like are caused. At present, water and oxygen can be isolated by arranging a film package on the organic layer 37, but the film package can only block the water and oxygen from invading into the display panel from the upper layer of the organic layer 37, and the problem that the water and oxygen erodes the display panel through the lower layer structure of the display panel exists.

In the embodiment of the invention, in the bending region 10, an opening 321 is formed on the inorganic layer 30 and penetrates through the insulating layer 32, and the opening 321 exposes the barrier layer 31; an organic layer 37 fills the opening 321, i.e., the organic layer 37 is formed between the barrier layer 31 and the metal layer 36, and the thicknesses of the organic layer 37 and the insulating layer 32 are equal. According to the display panel provided by the embodiment of the invention, the opening 321 is formed on the inorganic layer 30 corresponding to the bending region 10, and the organic layer 37 is filled in the opening 321, so that the organic material has high elasticity, stress generated during bending can be released, the problem that the bending region 10 of the flexible display device can bear over-concentrated stress during bending is solved, and the problems of cracking, peeling, dislocation and the like of each film layer of the array substrate are avoided; meanwhile, in the opening 321, the organic layer 37 is formed between the barrier layer 31 and the metal layer 36, and through the organic layer 37 and the barrier layer 31 arranged between the substrate base plates 20, water and oxygen are prevented from penetrating through the organic layer 37 to corrode metal wires, so that the normal display performance of the display panel is ensured.

Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention. As can be seen from fig. 2, the display panel 1 extends along a first direction and a second direction respectively, wherein the first direction (Z direction) is perpendicular to the second direction (X direction), the first direction (Z direction) is perpendicular to a plane where the main body of the display panel 1 is located, and the second direction (X direction) is along the metal routing.

Alternatively, the material of the barrier layer 31 includes an oxide semiconductor material or a metal material having good film adhesion, bending property, and good water-oxygen barrier property, and may include, for example, indium gallium zinc oxide or the like.

It should be noted that the specific position of the opening 321 on the inorganic layer 30 in the bending region 10 is not particularly limited in the present invention, as long as the opening is located in the bending region 10. The cross-sectional shape of the opening 321 may include a trapezoid, a rectangle, or the like, and those skilled in the art can set the cross-sectional shape of the opening 321 according to the product requirement, and the invention is not limited in particular, and fig. 2 only illustrates that the cross-sectional shape of the opening 321 is a trapezoid.

Specifically, because the water-oxygen barrier property of the flexible substrate 20 and the organic layer 37 is poor, water vapor and oxygen can easily permeate through the flexible substrate 20 and the organic layer 37 to corrode the metal wiring, in the above embodiment, the barrier layer 31 is disposed below the organic layer 37 through the opening 321, so that water vapor and oxygen cannot enter the organic layer 37, and the metal wiring is located on one side of the organic layer 37 far away from the flexible substrate 20, thereby preventing corrosion of water vapor and oxygen to the metal wiring. In view of preventing crack propagation, in the flexible display panel according to the embodiment of the present invention, as shown in fig. 3, in the area of the opening 321, a plurality of sub openings 322 may be disposed at intervals on a side of the barrier layer 31 away from the substrate 20, that is, a side of the barrier layer 31 close to the organic layer 37, the organic layer 37 fills the sub openings 322, and the sub openings 322 on a side of the barrier layer 31 close to the organic layer 37 in the bending region 10 are filled with the organic layer 37, so that stress in the barrier layer 31 may be released, and thus crack propagation to the display region may be prevented in all directions.

Specifically, compared to the barrier layer 31 that is not patterned in fig. 2, the present embodiment introduces the organic layer 37 into the sub-openings 322 formed on the barrier layer 31 in the bending region 10, and since the flexibility of the organic material is better than that of the inorganic material, the bending stress applied to the barrier layer 31 during bending is effectively reduced, and the risk of bending failure is reduced. Meanwhile, the organic layer 37 introduced into the plurality of sub-openings 322 formed in the barrier layer 31 in the bending region 10 is of a patterned structure, so that the internal stress of the organic layer 37 is reduced, and the flexibility of the bending region 10 is further increased.

In the display panel provided by the embodiment of the invention, the bending region 10 at least includes the organic layer 37 disposed in the opening 321 on the inorganic layer 30, and the barrier layer 31 is disposed below the organic layer 37. Therefore, when the flexible display panel is bent, the generated stress is mainly concentrated in the organic layer 37 and the barrier layer 31, and meanwhile, since the barrier layer 31 located in the bending region 10 is provided with a plurality of sub-openings 322 arranged at intervals on a side close to the organic layer 37, and the sub-openings 322 are filled with the organic layer 37, the stress concentrated on the barrier layer 31 can be absorbed by the organic filler filled in the sub-openings 322 to increase flexibility.

Optionally, the distance between any adjacent sub openings 322 may be the same or different, and the shape of any sub opening 322 may be the same or different.

Optionally, as shown in fig. 3, in the area of the opening 321, the distance between two adjacent sub openings 322 is equal, so that the organic layer 37 located in the bending region 10 can be uniformly distributed in the sub openings 322, and when a bending operation is performed, the stress of each part is more uniform, thereby effectively improving the bending resistance of the whole display panel.

In a specific implementation manner, in the display panel provided by the present invention, the plurality of sub openings 322 includes a plurality of first sub openings 323, and the first sub openings 323 are disposed along a direction in which the metal traces extend.

In the embodiment of the present invention, as shown in fig. 4, the metal layer 36 includes a plurality of metal traces (not shown) extending along the second direction (X direction), and the plurality of metal traces are arranged along a third direction (Y direction) perpendicular to the second direction (X direction), wherein the third direction (Y direction) is a direction perpendicular to both the first direction and the second direction, in other words, two of the first direction (Z direction), the second direction (X direction) and the third direction (Y direction) are perpendicular to each other; specifically, the metal wires may be arranged at equal intervals; the metal traces may be located only above the organic layer 37, or may be located above the organic layer 37 and extend from the bending region 10 to the non-bending region 11.

Specifically, as shown in fig. 4, each of the first sub-openings 323 extends along the third direction (Y direction), that is, the first sub-openings 323 are perpendicular to the metal traces, and a plurality of the first sub-openings 323 are arranged along the extending direction (X direction) of the metal traces. When the bending operation is performed in the direction (Y direction) perpendicular to the extending direction of the metal trace, the organic layer 37 is filled with the plurality of first sub-openings 323 arranged in the extending direction (X direction) of the metal trace, so that the stress distributed in the barrier layer 31 in the extending direction (X direction) of the metal trace can be absorbed by the organic layer 37 filled with the first sub-openings 323, and the stress on the barrier layer 31 between any two adjacent first sub-openings 323 is small, thereby improving the bending effect.

In a specific embodiment, as shown in fig. 5, the plurality of sub-openings 322 include a plurality of second sub-openings 324, and the second sub-openings 324 are disposed along a direction perpendicular to an extending direction of the metal traces, specifically, as shown in fig. 5, each of the second sub-openings 324 extends along the second direction (X direction), that is, the second sub-openings 324 are parallel to the metal traces, and the plurality of second sub-openings 324 are arranged along a direction perpendicular to the extending direction of the metal traces (Y direction). When the bending operation is performed along the extending direction (X direction) of the metal trace, the organic layer 37 is filled with the plurality of second sub-openings 324 arranged along the direction (Y direction) perpendicular to the extending direction (Y direction) of the metal trace, so that the stress distributed on the barrier layer 31 along the direction (Y direction) perpendicular to the extending direction of the metal trace can be absorbed by the organic layer 37 filled with the second sub-openings 324, the stress on the barrier layer 31 between any two adjacent second sub-openings 324 is small, and the bending effect is improved.

Further, as shown in fig. 6, while the first sub-opening 323 is disposed along the direction extending with the metal trace, the second sub-opening 324 is disposed along a direction perpendicular to the metal trace extending direction, and specifically, as shown in fig. 6, the orthographic projections of the second sub-openings 324 on the substrate base plate 20 are arranged in an array, since the second sub-opening 324 is disposed on the barrier layer 31 in the bending region 10, and the second sub-openings 324 are filled with the organic layer 37, so that the stress concentrated on the barrier layer 31 can be absorbed by the organic material filled in each of the second sub-openings 324 to improve the flexibility of the bending region 10, when the bending operation is performed, the barrier layers 31 arranged in an array can effectively prevent cracks from diffusing to the display area, and effectively improves the bending resistance of the whole display panel.

In the embodiment of the present invention, as shown in fig. 5 and fig. 6, each of the second sub-openings 324 extends along the second direction (X direction), that is, the second sub-openings 324 are parallel to the metal traces, and a plurality of the second sub-openings 324 are arranged along a direction (Y direction) perpendicular to the extending direction of the metal traces. Further, an orthogonal projection of the second sub-opening 324 on the substrate base plate 20 falls within an orthogonal projection of a spacing region of any two metal traces on the substrate base plate 20.

Specifically, as shown in fig. 5 and fig. 6, the barrier layer 31 in the orthographic projection area of the metal traces on the barrier layer 31 may be left, that is, the orthographic projection area of any two spaced areas of the metal traces on the barrier layer 31 is free of the barrier layer 31. Since the barrier layer 31 is not present in the orthographic projection area of any two spaced areas of the metal traces on the barrier layer 31, that is, the orthographic projection area of any one spaced area of the metal trace on the barrier layer 31 corresponds to the position of the second sub-opening 324 on the barrier layer 31, and the second sub-opening 324 fills the organic layer 37, when the bending operation is performed in the direction (Y direction) perpendicular to the extending direction of the metal trace, the organic layer 37 filled in the second sub-opening 324 can block the crack on the barrier layer 31 from diffusing in the direction (Y direction) perpendicular to the extending direction of the metal trace, thereby improving the bending effect.

In a specific embodiment, the display panel 1 according to the present invention includes, as shown in fig. 7: a base substrate 20; an inorganic layer 30 disposed on the base substrate 20; the inorganic layer 30 comprises a barrier layer 31 disposed on the substrate 20, an insulating layer 32 disposed on the barrier layer 31, and a metal layer 36 disposed on the inorganic layer 30, wherein the metal layer 36 comprises a plurality of metal traces; an opening 321 is formed in the inorganic layer 30 in the bending region 10 and penetrates through the insulating layer 32; an organic layer 37 fills the opening 321; the thickness of the barrier layer 31 within the opening 321 is smaller than the thickness of the barrier layer 31 outside the opening 321. Specifically, in this embodiment, compared with the embodiment shown in fig. 2, the thickness of the barrier layer 31 is reduced, so that the bending resistance of the barrier layer 31 in the opening 321 is improved.

Further, in the display panel provided by the present invention, the barrier layer 31 is formed with a plurality of sub-openings 322 disposed at intervals on a side of the opening 321 away from the substrate base plate 20; the organic layer 37 fills the sub-openings 322; the thickness of the barrier layer 31 within the opening 321 is smaller than the thickness of the barrier layer 31 outside the opening 321. Specifically, in this embodiment, compared with the embodiment shown in fig. 3, on the basis of reducing the thickness of the barrier layer 31 in the opening 321 region, the sub-openings 322 are further formed on the side of the barrier layer 31 away from the substrate 20, so that the bending resistance of the barrier layer 31 in the opening 321 is improved.

In this embodiment, the thickness of the barrier layer 31 within the range of the opening 321 and the thickness of the barrier layer 31 outside the range of the opening 321 both refer to the maximum thickness thereof, for example, as shown in fig. 3, the barrier layer 31 is formed with a plurality of sub openings 322 at intervals on one side of the opening 321 region away from the substrate 20, and if the thickness of the barrier layer 31 between any two sub openings 322 is greater than the thickness of the barrier layer 31 in the sub openings 322, the thickness of the barrier layer 31 outside the range of the opening 321, that is, the thickness of the barrier layer 31 between any two sub openings 322 is greater than the thickness of the barrier layer 31.

In a specific embodiment of the display panel provided by the present invention, as shown in fig. 3 and 8, the depth of the sub-opening 322 is less than or equal to the thickness of the barrier layer 31 within the range of the opening 321.

As shown in fig. 3, the depth of the sub-opening 322 may be smaller than the thickness of the barrier layer 31 within the range of the opening 321, that is, a plurality of concave-convex engaging structures are formed between the barrier layer 31 and the organic layer 37, specifically, the barrier layer 31 is formed with a plurality of sub-openings 322 (i.e., concave portions) on the side of the opening 321 away from the substrate 20, and the organic layer 37 is formed with a plurality of convex portions on the side of the organic layer 37 close to the substrate 20, each concave portion corresponding to the convex portion to form one concave-convex engaging structure.

Optionally, the sub-openings 322 may have a depth equal to the thickness of the barrier layer 31 within the openings 321. Specifically, as shown in fig. 8, the sub-openings 322 formed in the barrier layer 31 penetrate through the barrier layer 31, so that the stress distributed in the thickness direction of the barrier layer 31 can be absorbed by the organic layer 37 filled in the sub-openings 322.

In a specific embodiment of the display panel provided by the present invention, as shown in fig. 3, the depth of the sub-openings 322 may be smaller than the thickness of the barrier layer 31 within the range of the opening 321, that is, the thickness of the barrier layer 31 within the sub-openings 322 is smaller than the thickness of the barrier layer 31 between any two adjacent sub-openings 322.

Optionally, the thickness of the barrier layer 31 in the sub-opening 322 is in the range of

To

The thickness of the barrier layer 31 between any two adjacent sub-openings 322 is within a range of

To

Thereby the messenger is located in opening 321 barrier layer 31 and arbitrary two adjacent between the sub-opening 322 harmony between the barrier layer 31 is better, has both guaranteed anti effect of buckling, can guarantee good water oxygen separation effect simultaneously again, has improved product quality.

In a specific embodiment, as shown in fig. 3, in the display panel provided by the present invention, a spacing distance between any two adjacent sub-openings 322 is greater than or equal to a width of the sub-openings 322, that is, a width of the barrier layer 31 between any two adjacent sub-openings 322 is greater than a width of the organic layer 37 in the sub-openings 322, and by forming the sub-openings 322 on the barrier layer 31 in the bending region 10, stress acting on the barrier layer 31 can be better released, and cracks can be prevented from being generated, and at the same time, the organic layer 37 filled in the sub-openings 322 can further absorb stress concentrated on the barrier layer 31, and cracks can be prevented from being spread.

Wherein the wider the sub-opening 322, the more the organic layer 37 filled in the sub-opening 322 can relatively release the stress in the barrier layer 31 to prevent crack propagation, but it is the barrier layer 31 that mainly plays a role of preventing water and oxygen, so the wider the sub-opening 322, the smaller the spacing distance between any two adjacent sub-openings 322, i.e. the width of the barrier layer 31 in the bending region 10, is relatively, and the water and oxygen blocking capability is relatively weakened. Therefore, the width of the sub-opening 322 can be determined according to practical situations.

Optionally, the spacing distance between any two adjacent sub-openings 322 is in a range of 5 μm to 20 μm, and the width of each sub-opening 322 is in a range of 5 μm to 8 μm, so that the coordination between the organic layer 37 filled in the opening 321 and the barrier layer 31 between any two adjacent sub-openings 322 is better, the flexibility of the organic layer 37 filled in the opening 321 and the water-oxygen barrier effect exerted by the barrier layer 31 between any two adjacent sub-openings 322 are in an optimal balance, and a better crack propagation preventing effect is achieved on the basis of ensuring the water-oxygen barrier performance of the barrier layer 31.

In practical implementation, in the display panel provided in the embodiments of the present invention, the inorganic layer may be formed by a Chemical Vapor Deposition (CVD) method or an Atomic Layer Deposition (ALD) method. In the bending region, the opening formed in the inorganic layer and penetrating through the insulating layer may be formed by an Open mask process, i.e., a place where the opening needs to be formed is shielded and an inorganic material is deposited at other places, or the opening penetrating through the insulating layer may be formed by a photoresist process, i.e., a place where the opening needs to be formed is etched after a whole layer of the insulating layer is formed, which is not limited herein.

In a specific implementation, in the display panel provided in the embodiment of the present invention, the organic layer filling the opening is generally formed by an inkjet printing process, and the present invention is not limited herein.

In conclusion, the application provides a display panel, through be formed with the opening that runs through the insulating layer and set up in the bending zone on inorganic layer, be provided with barrier layer and organic layer in the opening, and the barrier layer is formed with the sub-opening that a plurality of intervals set up in the one side that substrate base plate was kept away from at the open region, organic layer packing sub-opening, can guarantee the water oxygen barrier effect, also can better release stress, prevent to produce the crackle, organic layer in the sub-opening also can further release stress, prevent that the crackle from spreading to the metal and walk the line. Therefore, the invention solves the problem of stress concentration when the display panel is bent, avoids the phenomena of cracking, peeling, dislocation and the like of each film layer of the display panel, simultaneously can prevent cracks from diffusing to the metal wires and prevent water and oxygen from corroding the metal wires, and ensures the normal display performance of the display panel.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

Claims

1. A display panel, comprising a bending region, the display panel further comprising:

a substrate base plate;

an inorganic layer disposed on the base substrate; the inorganic layer comprises a barrier layer arranged on the substrate and an insulating layer arranged on the barrier layer;

2. The display panel of claim 1, wherein the barrier layer is formed with a plurality of sub-openings spaced apart from each other on a side of the opening region away from the substrate; the organic layer fills the sub-openings.

3. The display panel of claim 2, wherein the plurality of sub-openings comprises a plurality of first sub-openings, and the first sub-openings are arranged along a direction in which the metal traces extend.

4. The display panel according to claim 2 or 3, wherein the plurality of sub openings comprises a plurality of second sub openings, and the second sub openings are arranged along a direction perpendicular to the extending direction of the metal traces.

5. The display panel of claim 4, wherein an orthographic projection of the second sub-opening on the substrate base plate falls within an orthographic projection of any two spaced regions of the metal traces on the substrate base plate.

6. The display panel according to claim 1 or 2, wherein a thickness of the barrier layer in the opening range is smaller than a thickness of the barrier layer outside the opening range.

7. The display panel of claim 2, wherein the sub-openings have a depth less than or equal to a thickness of the barrier layer within the openings.

8. The display panel of claim 7, wherein the barrier layer is in the sub-opening with a thickness in a range of

To

To

9. The display panel according to claim 2, wherein a spacing distance between any two adjacent sub-openings is greater than or equal to a width of the sub-openings.

10. The display panel according to claim 9, wherein a spacing distance between any two adjacent sub-apertures is in a range of 5 μm to 20 μm, and a width of the sub-apertures is in a range of 5 μm to 8 μm.