CN114068846B

CN114068846B - Display panel and display device

Info

Publication number: CN114068846B
Application number: CN202111365103.4A
Authority: CN
Inventors: 王涛; 高昊
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-12-02
Anticipated expiration: 2041-11-17
Also published as: CN114068846A

Abstract

Some embodiments of the present disclosure provide a display panel and a display device, which relate to the field of display technologies, and can improve the packaging performance of the display panel and the product yield of the display device. The display panel has a display area and a peripheral area surrounding the display area. The display panel comprises a retaining wall structure, a plurality of signal lines, a water absorption structure and a guide structure. The retaining wall structure is positioned in the peripheral area and surrounds the display area. The signal line passes through the retaining wall structure. The water absorption structure is positioned on one side of the retaining wall structure far away from the display area and is arranged at an interval with the retaining wall structure; the water absorbing structure is configured to absorb water vapor. One end of the guide structure is connected with the retaining wall structure, and the other end of the guide structure is connected with the water absorption structure; the guide structure is configured to guide moisture in the retaining wall structure into the water absorbing structure. Some embodiments of the present disclosure provide a display panel and a display device for displaying images.

Description

Display panel and display device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a display panel and a display device.

Background

With the development of display technology, flexible display devices are widely used. Among them, the flexible Organic Light-Emitting Diode (OLED) display device has the characteristics of high image contrast, light weight, thinness, flexibility, and the like, and is applied to various occasions. In order to adapt to various application occasions, it is important to improve the service life and performance requirements of the flexible display device, wherein the good encapsulation performance can improve the service life and performance of the OLED display device.

Disclosure of Invention

Some embodiments of the present disclosure provide a display panel and a display device, which can improve the packaging performance of the display panel and the product yield of the display device.

In order to achieve the above object, some embodiments of the present disclosure provide the following technical solutions:

in one aspect, a display panel is provided. The display panel has a display area and a peripheral area surrounding the display area. The display panel comprises a retaining wall structure, a plurality of signal lines, a water absorption structure and a guide structure. The retaining wall structure is located in the peripheral area and surrounds the display area. The signal line passes through the retaining wall structure. The water absorption structure is positioned on one side of the retaining wall structure far away from the display area and is arranged at an interval with the retaining wall structure; the water absorbing structure is configured to absorb water vapor. One end of the guide structure is connected with the retaining wall structure, and the other end of the guide structure is connected with the water absorption structure; the guide structure is configured to guide water vapor in the retaining wall structure into the water absorbing structure.

In the display panel provided by the embodiment of the present disclosure, the signal line passes through the retaining wall structure, that is, the extending direction of the signal line and the extending direction of the retaining wall structure are mutually crossed, and part of the signal line is located on one side of the retaining wall structure far away from the display area, and part of the signal line is located on one side of the retaining wall structure near the display area. And the water vapor enters the outer side of the retaining wall structure from the outside along the signal line, then flows along the retaining wall structure and is gathered in the retaining wall structure. The steam in the retaining wall structure flows to the water absorption structure through the guide structure and is stored in the water absorption structure, and the steam gathered in the retaining wall structure can be reduced. Because the structure that absorbs water sets up in the one side that the display area was kept away from to barricade structure, like this, can reduce the risk of the steam in the barricade structure to the invasion of display area one side, promote display panel's packaging performance, and then promote display panel's life.

In some embodiments, the retaining wall structure comprises at least one organic layer. The material of the water absorbing structure is the same as the material of the at least one organic layer, and/or the material of the guiding structure is the same as the material of the at least one organic layer. In some embodiments, the display panel further comprises a planarization layer and a pixel defining layer disposed on the planarization layer; the flat layer comprises a first supporting portion located in the peripheral area, the pixel defining layer comprises a second supporting portion located in the peripheral area, and the first supporting portion and the second supporting portion are arranged in a stacked mode. The at least one organic layer of the retaining wall structure includes the first support portion and the second support portion.

The thickness of the water absorption structure is the same as that of the first supporting part in the same layer and the material of the water absorption structure is the same as that of the first supporting part; or the thickness of the water absorption structure is the same as that of the second supporting part, and the water absorption structure is made of the same material; or the water absorption structure comprises a first part and a second part which are arranged in a stacked mode, wherein the first part and the first supporting part are arranged on the same layer and are made of the same material, and the second part and the second supporting part are arranged on the same layer and are made of the same material.

In some embodiments, the retaining wall structure further comprises an inorganic protective layer covering the at least one organic layer; the inorganic protective layer also covers the water absorbing structure and the guide structure.

In some embodiments, the display panel further comprises an encapsulation layer. The packaging layer comprises a first inorganic layer, an organic packaging layer and a second inorganic layer which are arranged in sequence. A portion of the first inorganic layer and/or a portion of the second inorganic layer serves as the inorganic protective layer.

In some embodiments, the water-absorbing structure comprises a plurality of water-absorbing portions; the plurality of water absorbing parts are arranged at intervals along the circumferential direction of the retaining wall structure; each water absorption part is connected with the retaining wall structure through at least one guide structure.

In some embodiments, the water absorbing part includes a plurality of sub-parts and at least one connection part. Each of the plurality of sub-portions is arranged at intervals along the circumferential direction of the retaining wall structure. Two adjacent sub-parts are connected through the connecting part; the connecting portion has a cross-sectional area smaller than a cross-sectional area of the sub-portion connected thereto in a direction perpendicular to the direction in which the sub-portion extends.

In some embodiments, the width of the connecting portion is less than the width of the sub-portion.

In some embodiments, the retaining wall structure includes a first sub-retaining wall, a second sub-retaining wall, a third sub-retaining wall and a fourth sub-retaining wall which are sequentially connected end to end, and a joint of two adjacent sub-retaining walls is a corner. At least one of the guide structures is connected with a portion of the retaining wall structure near the corner.

In some embodiments, an orthographic projection of the signal line on the plane of the display panel and an orthographic projection of the water absorption structure on the plane of the display panel are separated from each other.

In some embodiments, the display panel further comprises an array substrate and an anti-cracking retaining wall. The array substrate comprises a substrate and an inorganic material laminated layer arranged on the substrate. The anti-cracking retaining wall is positioned on one side, far away from the display area, of the water absorption structure, and the anti-cracking retaining wall and the water absorption structure are arranged at intervals; at least part of the crack-resistant retaining wall is embedded in the inorganic material laminated layer, and the material of the crack-resistant retaining wall comprises an organic material.

In some embodiments, the display panel further includes a spacer layer disposed on the pixel defining layer, the spacer layer including a third supporting portion located in the peripheral region, the first supporting portion, the second supporting portion, and the third supporting portion being stacked. The retaining wall structure comprises a first retaining wall, and the first retaining wall comprises a first supporting part, a second supporting part and a third supporting part.

In some embodiments, the pixel defining layer further comprises a fourth supporting portion located in a peripheral region, the fourth supporting portion being located on a side of the second supporting portion close to the display region. The spacer layer comprises a fifth supporting part positioned in the peripheral area, and the fifth supporting part is positioned on one side of the third supporting part close to the display area; the fourth support portion and the fifth support portion are stacked. The retaining wall structure further comprises a second retaining wall, and the second retaining wall comprises the fourth supporting part and the fifth supporting part. The second retaining wall is arranged on one side, close to the display area, of the first retaining wall, and is arranged at intervals with the first retaining wall, the direction of the plane where the display panel is located is perpendicular to the first retaining wall, and the height of the first retaining wall is larger than that of the second retaining wall. The water absorption structure is connected with the first retaining wall through the guide structure.

In another aspect, a display device is provided. The display device comprises the display panel according to any one of the embodiments.

The beneficial effects that the display device provided by the embodiment of the present disclosure can achieve are the same as those that the display panel provided by the above technical solution can achieve, and are not described herein again.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:

fig. 1 is a structural diagram of a display device according to an embodiment of the present disclosure;

fig. 2 is a structural diagram of another display device provided in the embodiment of the present disclosure;

fig. 3 is a circuit structure diagram of a display panel according to an embodiment of the disclosure;

fig. 4 is a circuit structure diagram of another display panel provided in the embodiment of the present disclosure;

fig. 5 is a structural diagram of a display panel according to an embodiment of the disclosure;

fig. 6 is a structural diagram of another display panel provided in the embodiment of the present disclosure;

fig. 7 is a structural diagram of another display panel provided in the embodiment of the present disclosure;

FIG. 8 is a cross-sectional view of the display panel provided in FIG. 6 along section line C1-C1;

FIG. 9A is a cross-sectional view of the display panel shown in FIG. 6 along the sectional line C2-C2;

FIG. 9B is another cross-sectional view of the display panel provided in FIG. 6 along section line C2-C2;

FIG. 9C is a further cross-sectional view of the display panel provided in FIG. 6 along section line C2-C2;

FIG. 9D is a further cross-sectional view of the display panel provided in FIG. 6 along section line C2-C2.

Detailed Description

For the convenience of understanding, the technical solutions provided by some embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It is obvious that the described embodiments are only some, not all embodiments of the proposed solution. All other embodiments that can be derived by one skilled in the art from some of the embodiments of the disclosure are intended to be within the scope of the disclosure.

Unless the context requires otherwise, throughout the description and the claims, the term "comprise" and its other forms, such as the third person's singular form "comprising" and the present participle form "comprising" are to be interpreted in an open, inclusive sense, i.e. as "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" and the like are intended to indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the 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 embodiments of the present disclosure, "a plurality" means two or more unless otherwise specified.

In describing some embodiments, expressions of "coupled" and "connected," along with their derivatives, may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other. As another example, some embodiments may be described using the term "coupled" to indicate that two or more elements are in direct physical or electrical contact. However, the terms "coupled" or "communicatively coupled" may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents herein.

Additionally, the use of "based on" means open and inclusive, as a process, step, calculation, or other action that is "based on" one or more stated conditions or values may in practice be based on additional conditions or values beyond those stated.

"A and/or B" includes the following three combinations: a alone, B alone, and a combination of A and B.

Example embodiments are described herein with reference to cross-sectional and/or plan views as idealized example figures. In the drawings, the thickness of layers and regions are exaggerated for clarity. Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the exemplary embodiments.

It should be noted that, in the present disclosure, the embodiments and features of the embodiments may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Some embodiments of the present disclosure provide a display device 1000, and the display device 1000 may be a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), an in-vehicle computer, and the like.

The display device 1000 may be: a Liquid Crystal Display (LCD) device, an Organic Light Emitting Diode (OLED) Display device, and the like, and the embodiment of the disclosure does not limit the specific form of the Display device 1000. The flexible OLED display device has the advantages of being light, thin, bendable and the like, and is widely applied to various occasions.

The following embodiments are described by taking the display device 1000 as an example of a flexible OLED display device.

As shown in fig. 1, the flexible OLED display device 1000 includes a flexible OLED display panel 1001. As shown in fig. 2, the display panel 1001 includes an array substrate 100, a light emitting device 200, and an encapsulation layer 300. The light emitting device 200 is disposed on the array substrate 100, and the encapsulation layer 300 encapsulates the light emitting device 200 on the array substrate 100.

As shown in fig. 3 and 4, the display panel 1001 has a display area AA and a peripheral area BB surrounding the display area AA. The display area AA includes a plurality of sub-pixels P, and a light emitting device 200 and a pixel driving circuit 410 are disposed in each sub-pixel P. The pixel driving Circuit 410 receives a data signal transmitted by a Source Driver Integrated Circuit (SDIC), and the pixel driving Circuit 410 is configured to control the light emitting device 200 to emit light according to the received data signal. For convenience of description, the plurality of sub-pixels P are described as an example of being arranged in a matrix form in the present disclosure. In this case, the subpixels P arranged in a row in the second direction X are referred to as a row of subpixels, the subpixels P arranged in a row in the first direction Y are referred to as a column of subpixels P, one row of subpixels P may be connected to one or more scanning signal lines GL, and one column of subpixels P may be connected to one data line DL.

As shown in fig. 3 and 4, the display panel 1001 further includes a gate driving Circuit 420 and a driving Circuit Board (SPCB) 500 disposed in the peripheral region BB. The driving circuit board 500 includes driving circuits such as a Timing Controller (TCON), a power management chip DC/DC, and an adjustable resistance voltage dividing circuit (Vcom). The Gate Driver (GDIC) includes a Gate driving Circuit 420. The driving circuit board 500 is electrically connected to the pixel driving circuit 410 and the gate driving circuit 420 through at least one signal line 122 to transmit control signals of the driving circuit board 500 to the pixel driving circuit 410 and the gate driving circuit 420, respectively. The display panel 1001 displays an image by the combined action of electronic elements and circuits such as the driving circuit board 500, the gate driving circuit 420, the pixel driving circuit 410, and the light emitting device 200.

As shown in fig. 5, a retaining wall structure 600 is disposed on the display panel 1001. The retaining wall structure 600 is located in the peripheral region BB and surrounds the display region AA. Therefore, the plurality of signal lines 122 need to pass through the portions of the retaining wall structures 600 to be coupled to the driving circuit board 500. Moisture in the air easily intrudes from the edge of the display panel 1001 and is collected near the dam structure 600 along the signal line 122. In the case where the portions of the retaining wall structures 600 close to the signal lines 122 are made of organic materials, water and oxygen are easily absorbed due to the properties of the organic materials, and thus, the water and oxygen intruding along the signal lines 122 are absorbed by the retaining wall structures 600 and flow along the extending direction of the retaining wall structures 600, thereby forming a closed water vapor loop. Then, since a part of the signal line 122 is located on one side of the retaining wall structure 600 close to the display area AA and another part is located on one side of the retaining wall structure away from the display area AA, under the condition that the retaining wall structure 600 absorbs water to be saturated, the invading water vapor enters the display panel 1001 along the part of the signal line 122 located outside the retaining wall structure 600, which causes the performance of the circuit in the display panel 1001 to be disabled.

To solve the above problem, some embodiments of the present disclosure provide a display panel 1001. As shown in fig. 6, the display panel 1001 includes a barrier structure 600.

In some embodiments, the retaining wall structure 600 may include a plurality of retaining walls to enhance the blocking effect of the material of the organic encapsulation layer 18. For example, the retaining wall structure 600 includes a first retaining wall 610 and a second retaining wall 620 disposed at an interval. Illustratively, the height of the first wall 610 is greater than that of the second wall 620 in a direction perpendicular to the plane of the display panel 1001, so that the material flow of the organic encapsulation layer 18 can be further blocked, and the encapsulation performance of the display panel 1001 can be improved.

In some embodiments, as shown in fig. 6, the display panel 1001 further includes a water absorbing structure 800 and a guiding structure 900. The water absorption structure 800 is located on a side of the retaining wall structure 600 far away from the display area AA, and is spaced apart from the retaining wall structure 600. The water absorbing structure 800 is configured to absorb and store water vapor.

One end of the guiding structure 900 is connected to the side of the retaining wall structure 600 away from the display area AA, and the other end is connected to the water absorbing structure 800. The guide structure 900 is configured to guide moisture in the retaining wall structure 600 into the water absorbing structure 800. Thus, the water vapor intruding along the signal line 122 is prevented from forming a closed loop in the retaining wall structure 600. Moreover, the water absorption structure 800 is located on one side of the retaining wall structure 600 far away from the display area AA, and can guide water vapor to the side far away from the display area AA, so that the water oxygen corrosion resistance of the display panel 1001 is improved, and the packaging performance of the display panel 1001 is improved.

In some embodiments, the material of the water absorbing structure 800 includes an organic material; and/or the material of the guiding structure 900 comprises an organic material.

Illustratively, the material of the water absorbing structure 800 includes an organic material. Because the organic material is easy to absorb water and oxygen, the material of the water absorbing structure 800 comprises the organic material, which is beneficial to achieving the purpose that the water absorbing structure 800 absorbs water vapor and stores the water vapor.

Illustratively, the material of the guiding structure 900 includes an organic material, so as to increase the speed of guiding the water vapor in the retaining wall structure 600 to the water absorbing structure 800, and reduce the water vapor accumulated near the retaining wall structure 600.

For example, the material of the water absorbing structure 800 and the guiding structure 900 includes an organic material. The water absorbing structure 800 and the guiding structure 900 work together to further increase the speed of guiding the water vapor in the retaining wall structure 600 to the water absorbing structure 800, and reduce the water vapor gathered near the retaining wall structure 600.

In other embodiments, the material of the water absorbing structure 800 includes an organic material and water absorbing particles; and/or, the material of the guiding structure 900 includes an organic material and water absorbing particles. The water absorbent particles include metal oxides, for example, any one of calcium oxide (CaO), barium oxide (BaO), and magnesium oxide (MgO).

As an example, the material of the water absorbing structure 800 includes an organic material and MgO; the material of the guide structure 900 includes an organic material and MgO.

The water absorbing structure 800 and/or the guiding structure 900 after doping with water absorbing particles (e.g., mgO) has water absorbing properties superior to organic materials that are not doped with water absorbing particles. Thus, under the condition that the water absorbing structure 800 and/or the guiding structure 900 and the organic layer in the retaining wall structure 600 are/is arranged in the same layer by using the same material, the water absorbing performance of the material of the water absorbing structure 800 is better than that of the material of the organic layer in the retaining wall structure 600, the process of transmitting the water vapor in the retaining wall structure 600 to the water absorbing structure 800 is accelerated, the probability of the signal line 122 being corroded by water oxygen is reduced, and the packaging performance of the display panel 1001 is improved.

Here, "same layer arrangement" refers to a layer structure formed by one patterning process using the same mask plate. Depending on the specific pattern, the single patterning process may include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous, and the specific patterns may be at different heights or have different thicknesses.

In some embodiments, as shown in fig. 6, an orthogonal projection of the signal line 122 on the plane of the display panel 1001 and an orthogonal projection of the water absorption structure 800 on the plane of the display panel 1001 are separated from each other, so as to avoid an adverse effect on the signal line 122 after the water absorption structure 800 absorbs water vapor.

Illustratively, as shown in fig. 5, the peripheral regions BB include a first peripheral region BB1, a second peripheral region BB2, a third peripheral region BB3, and a fourth peripheral region BB4. The first peripheral area BB1 is a signal line fan-out area, and includes various signal line extensions, such as power signal lines VDD and VSS. The signal line 122 located in the first peripheral area BB1 is coupled to the driving circuit board 500 through the retaining wall structure 600. Here, the orthographic projection of the signal line 122 on the plane of the display panel 1001 and the orthographic projection of the water absorbing structure 800 on the plane of the display panel 1001 are separated from each other.

As shown in fig. 6 and 8, in the third peripheral area BB3, the signal line 122 is located on the side of the retaining wall structure 600 close to the array substrate 100, and does not pass through the retaining wall structure 600. Here, the water absorbing structure 800 is located in the third peripheral area BB3 and is spaced from the retaining wall structure 600, and the orthographic projection of the signal line 122 on the plane of the display panel 1001 and the orthographic projection of the water absorbing structure 800 on the plane of the display panel 1001 are separated from each other.

Similarly, in the second peripheral area BB2 and the fourth peripheral area BB4, the positions of the signal line 122 and the retaining wall structure 600 are the same as in the third peripheral area BB3, and are not repeated herein. Therefore, the orthographic projection of the signal line 122 on the plane of the display panel 1001 in the second peripheral area BB2 and the orthographic projection of the water absorbing structure 800 on the plane of the display panel 1001 are separated from each other in the fourth peripheral area BB4.

In some embodiments, the retaining wall structure 600 includes at least one organic layer and an inorganic protective layer covering the at least one organic layer. Based on this, the material of the water absorbing structure 800, and/or the material of the guiding structure 900 is the same as the material of the at least one organic layer. Also, the inorganic protective layer also covers the water absorbing structure 800 and the guide structure 900.

Illustratively, the material of the water absorbing structure 800 is the same as the material of the at least one organic layer. The water absorption structure 800 and the portions of the retaining wall structure 600 can be formed by the same mask process, so that the manufacturing efficiency of the display panel 1001 is improved.

Alternatively, the material of the guide structure 900 is the same as the material of the at least one organic layer. The guiding structure 900 and the portions of the retaining wall structure 600 can be formed by the same mask process, so that the manufacturing efficiency of the display panel 1001 is improved. Also, the inorganic protective layer also covers the water absorbing structure 800 and the guide structure 900.

Alternatively, the water absorbing structure 800 and the guiding structure 900 may be made of the same material as at least one organic layer. The water absorbing structure 800 and the guiding structure 900 are formed simultaneously with the parts of the retaining wall structure 600 by using the same mask process.

In this way, the water absorbing structure 800 and/or the guiding structure 900 can be formed simultaneously with the portions of the retaining wall structure 600 by using the same mask process, thereby improving the manufacturing efficiency of the display panel 1001. It is understood that the same film formation process is used to form a film layer for forming a specific pattern, and then the same mask plate is used to form a layer structure by a single patterning process. Depending on the specific pattern, the single patterning process may include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous, and the specific patterns may be at different heights or have different thicknesses.

As shown in fig. 8, the array substrate 100, the light emitting device 200, and the encapsulation layer 300 are exemplified below according to a specific film structure of the flexible display panel 1001.

In some embodiments, the array substrate 100 includes a substrate 1 and a pixel driving circuit 410 disposed on the substrate 1, where the pixel driving circuit 410 includes a plurality of Thin Film Transistors (TFTs), at least one capacitor, and a plurality of signal lines, such as a "5T1C", "7T1C" circuit or a "7T2C" circuit, where T is a TFT and the number in front of T is the number of TFTs; c is a capacitor and the number preceding C is the number of capacitors.

In some examples, as shown in fig. 8, the array substrate 100 includes a substrate 1, a buffer layer 2, a semiconductor layer 3, a first gate insulating layer 4, a first gate metal layer 5, a second gate insulating layer 6, a second gate metal layer 7, an interlayer dielectric layer 8, a source-drain metal layer 9, and a passivation layer 10, which are sequentially stacked.

Wherein the semiconductor layer 3 comprises the active layer 31 of the TFT. The first gate metal layer 5 comprises the gate electrode 51 of the TFT and the first pole 52 of the capacitor. The second gate metal layer 7 comprises the second pole 71 of the capacitor. The source-drain metal layer 9 includes source electrodes 91 and drain electrodes 92 of a plurality of TFTs, and a transfer electrode 93.

It is understood that the thin film transistor included in the array substrate 100 may be a top gate thin film transistor or a bottom gate thin film transistor, which is not limited by the embodiments of the present disclosure.

In some embodiments, as shown in fig. 8, a planarization layer 11 is disposed on the array substrate 100 to planarize the surface of the array substrate 100. The material used for the planarization layer 11 may include an organic insulating material, or inorganic and organic insulating materials. Illustratively, the organic insulating material includes at least one of general-purpose polymers such as polymethyl methacrylate (PMMA) and Polystyrene (PS), polymer derivatives having a phenol group, acryl-based polymers, imide-based polymers, aryl ether-based polymers, amide-based polymers, fluorine-based polymers, p-xylene-based polymers, and vinyl alcohol-based polymers. For example, the material used for the planarization layer 11 includes polyimide. The flat layer 11 includes a first supporting portion 111 located in the peripheral area BB.

In some embodiments, as shown in fig. 8, the display panel 1001 further includes an anode layer 12, a pixel defining layer 13, a plurality of light emitting functional patterns 14, and a cathode layer 15. The anode layer 12 includes a plurality of pixel anodes 121 and a plurality of signal lines 122.

The pixel defining layer 13 is arranged on one side of the plurality of pixel anodes 121 and the flat layer 11 away from the substrate 1, and the pixel defining layer 13 defines a plurality of openings; each opening exposes at least a portion of the plurality of pixel anodes 121. The material employed for the pixel defining layer 13 includes at least one of an inorganic insulating material and an organic insulating material, for example, polyimide. The pixel defining layer 13 includes the second supporting portion 131 located in the peripheral region BB.

Each of the light emitting function patterns 14 is located in one opening. The plurality of light-emitting functional patterns 14 may have a single-layer structure or a multi-layer structure. Illustratively, the light emitting functional pattern 14 includes only a light emitting layer. Alternatively, the light emitting function pattern 14 includes a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer. The material used for the light emitting functional pattern 14 includes an inorganic light emitting material or an organic light emitting material. Illustratively, the colors of emitted light vary from one type of organic light-emitting material to another.

The cathode layer 15 is disposed on a side of the light emitting function pattern 14 away from the substrate 1, and the cathode layer 15 extends to a side of the pixel defining layer 13 away from the substrate 1 and covers the pixel defining layer 13.

The light emitting device 200 includes a pixel anode 121, a light emitting function pattern 14 on the pixel anode 121, and a cathode layer 15.

In some embodiments, as shown in fig. 8, the encapsulation layer 300 is disposed on a side of the cathode layer 15 away from the substrate 1, and the encapsulation layer 300 is configured to isolate water and oxygen from corroding the light emitting device 200 and the plurality of signal lines 122. Illustratively, the encapsulation layer 300 may include a first inorganic layer 17, an organic encapsulation layer 18, and a second inorganic layer 19, which are sequentially stacked. Wherein the first inorganic layer 17 and the second inorganic layer 19 are configured to block external water and oxygen, and the organic encapsulation layer 18 is configured to perform stress release and planarization within the film layer. Thus, as shown in fig. 8, the inorganic protective layer in the retaining wall structure 600 includes a portion of the first inorganic layer 17 and/or a portion of the second inorganic layer 19 in the encapsulation layer 300.

It is understood that the display panel 1001 may further include a color film and an encapsulation cover plate (not shown). The color film is disposed on a side of the encapsulation layer 300 away from the array substrate 100. The color film includes a plurality of filters of different colors, for example: a plurality of red filters, a plurality of green filters, and a plurality of blue filters. The plurality of color filters correspond to the plurality of sub-pixels P in the array substrate 100 one to one, so as to filter light passing through each sub-pixel P, so that different sub-pixels P display different colors. The glass cover plate is disposed on a side of the color film away from the array substrate 100 to encapsulate the color film on the array substrate 100 and protect the color film from being polluted or scratched by the external environment.

In some embodiments, as shown in fig. 8, the first supporting portion 111 and the second supporting portion 131 are stacked. And, the planarization layer 11 and the pixel defining layer 13 are made of organic materials, at least one organic layer in the retaining wall structure 600 includes the first supporting portion 111 and the second supporting portion 131.

Thus, as shown in fig. 8, the water absorbing structure 800 may be disposed in the same layer as the first support 111 and may be made of the same material, and the first support 111 and the water absorbing structure 800 may be formed by the same film forming process, where the thickness of the water absorbing structure 800 is equal to the thickness of the first support 111.

Alternatively, as shown in fig. 9B, the water absorption structure 800 and the second support part 131 are disposed on the same layer and have the same material, and the water absorption structure 800 and the second support part 131 are formed by the same film forming process, so that the thickness of the water absorption structure 800 is equal to the thickness of the second support part 131.

Alternatively, as shown in fig. 9C, the water absorption structure 800 includes a first portion 8111 and a second portion 8112 which are stacked, the first portion 8111 and the first support portion 111 are disposed in the same layer and have the same material, and the first support portion 111 and the water absorption structure 800 are formed by the same film forming process; the second part 8112 and the second supporting part 131 are arranged on the same layer and have the same material, and the second supporting part 131 and the water absorption structure 800 are formed by the same film forming process. The thickness of the water absorbing structure 800 is equal to the sum of the thickness of the first supporting part 111 and the thickness of the second supporting part 131.

The first supporting part 111 (and/or the second supporting part 131) and the water absorbing structure 800 formed by the same film forming process may be continuous or discontinuous. Also, the specific patterns may be at different heights or have different thicknesses.

In some examples, the guiding structure 900 is made of the same material and manufacturing process as the water absorbing structure 800 in the above embodiments. For example, as shown in fig. 9B, the first supporting portion 111 in the retaining wall structure 600 is made of an organic material, and the material of the guiding structure 900 is the same as that of the planarization layer 11. The guide structure 900 may be formed in the same layer as the planarization layer 11, and the thickness of the guide structure 900 is equal to the thickness of the first support part 111.

In other examples, as shown in fig. 8, the water absorbing structure 800 and the guiding structure 900 are disposed in the same layer as the flat layer 11, that is, the water absorbing structure 800, the guiding structure 900 and the first supporting portion 111 of the flat layer 11 are formed simultaneously by the same film forming process, so that the thickness of the first supporting portion 111 is equal to the thickness of the water absorbing structure 800 and the guiding structure 900.

It can be noted that the display panel 1001 further includes a spacer layer 16 disposed on the pixel defining layer 13, and the spacer layer 16 includes spacers located in the display area AA and spacers located in the peripheral area BB. The spacer is configured to support a mask to evaporate a material of the light emitting function pattern 14. The spacers are configured to heighten the height of the retaining wall structure 600 to improve the blocking effect of the retaining wall structure 600 on the material of the organic encapsulation layer 18 in the encapsulation layer. Therefore, as shown in fig. 8, the organic layer included in the retaining wall structure 600 may also include a portion of the pixel defining layer 13 or the spacer layer 16. As long as the water absorbing structure 800 and the guide structure 900 are ensured to be organic materials.

In some embodiments, as shown in fig. 8, the spacer layer 16 includes a third support portion 161 located in the peripheral region BB. The material used for the third support 161 includes an organic insulating material. For example, the material used for the third support 161 includes polyimide.

The first support 111, the second support 131, and the third support 161 are stacked. Thus, the first retaining wall 610 includes the first supporting portion 111, the second supporting portion 131, and the third supporting portion 161. The thickness of the water absorbing structure 800 is related to the water absorbing performance, and in the actual operation process, the thickness of the water absorbing structure 800 can be made thicker without affecting the performance of other structures in the display panel 1001. For example, as shown in fig. 9D, the water absorbing structure 800 may include a first portion 8111 disposed at the same layer as the first support portion 111, a second portion 8112 disposed at the same layer as the second support portion 131, and a third portion 8113 disposed at the same layer as the third support portion 161, such that the thickness of the water absorbing structure 800 is equal to the sum of the thickness of the first support portion 111, the thickness of the second support portion 131, and the thickness of the third support portion 161.

In some embodiments, with reference to fig. 8, the pixel defining layer 13 further includes a fourth supporting portion 132. The fourth supporting portion 132 is located at a side of the second supporting portion 131 close to the display area AA. The spacer layer 16 includes a fifth supporting portion 162 located in the peripheral region BB, and the fifth supporting portion 162 is located on a side of the third supporting portion 161 close to the display region AA; the fourth and fifth supporting

portions

132 and 162 are stacked.

The material of the fifth supporting portion 162 may be the same as that of the third supporting portion 161, and for example, the fifth supporting portion 162 and the third supporting portion 161 are formed by the same film forming process.

The second barrier 620 includes a fourth supporting portion 132 and a fifth supporting portion 162. The second retaining wall 620 is disposed on one side of the first retaining wall 610 close to the display area AA, and is spaced apart from the first retaining wall 610.

In some embodiments, as shown in fig. 8, the display panel 1001 includes an anti-cracking retaining wall 700. The crack-resistant retaining wall 700 is arranged on one side of the retaining wall structure 600 far away from the display area AA, and the crack-resistant retaining wall 700 and the water absorption structure 800 are arranged at intervals; the crack-resistant retaining wall 700 is at least partially embedded in the inorganic material laminated layer 110, and the material of the crack-resistant retaining wall 700 includes an organic material. The anti-crack retaining wall 700 is configured to reduce stress generated in the edge region of the flexible display panel 1001 in a bent state, prevent signal lines on the edge region from being broken, and improve the yield of the display panel.

Illustratively, the crack-resistant retaining wall 700 is formed by laminating inorganic materials 110. The inorganic material lamination 110 comprises a buffer layer 2, a first gate insulating layer 4, a second gate insulating layer 6, an interlayer dielectric layer 8 and a passivation layer 10, and the parts of the inorganic material lamination 110 located in the edge region jointly form an anti-cracking retaining wall 700. Here, the crack-resistant retaining wall 700 further includes a portion 112 of the flat layer 11 filled in the crack, and the portion 112 allows the crack to be completely filled. For example, the flat layer 11 is made of an organic material, and the area where the anti-cracking retaining wall 700 is located after the organic material is filled with the organic material improves the bearing capacity of the area in a bending state, so that when cracks are generated at the edge of the display panel 1001, the cracks are prevented from spreading to the display area AA, and the display effect is prevented from being affected.

It is understood that, as shown in fig. 9D, the crack-resistant wall 700 may include the portion 112 of the planar layer 11 and the portion 133 of the pixel defining layer 13, which are filled in the crack, for example, the planar layer 11 and the pixel defining layer 13 are both made of organic materials, so that more organic materials are filled in and cover the region where the crack-resistant wall 700 is located, and the stress bearing capability of the region in the bending state is further improved.

Illustratively, as shown in fig. 8, the water absorbing structure 800 is located between the retaining wall structure 600 and the anti-cracking retaining wall 700, and is spaced apart from the retaining wall structure 600 and the anti-cracking retaining wall 700. As shown in FIG. 9A, the distance L1 between the water-absorbing structure 800 and the retaining wall structure 600 is 30 μm to 50 μm. For example, the distance L1 between the water absorption structure 800 and the retaining wall structure 600 is 30 μm, 35 μm, or 50 μm. The distance between the water absorbing structure 800 and the retaining wall structure 600 is required to ensure a certain distance between the water absorbing structure 800 and the signal line 122 overlapped with the retaining wall structure 600, so that the water absorbing structure 800 does not directly absorb the water vapor gathered along the signal line 122, but guides the water vapor in the retaining wall structure 600 into the water absorbing structure 800. And, the inorganic protective layer covers the water absorbing structure 800, the guide structure 900, and the anti-crack retaining wall 700.

In some embodiments, as shown in FIG. 6, the water-absorbing structure 800 includes a plurality of water-absorbing portions 810. A plurality of water-absorbing parts 810 are provided at intervals along the circumferential direction of the retaining wall structure 600; each water intake portion 810 is connected to the retaining wall structure 600 by at least one guide structure 900.

For example, as shown in fig. 6, the peripheral area BB is provided with 8 water absorbing portions 810. Each water absorbing part 810 is connected to the first retaining wall 610 by a guide structure 900.

For example, as shown in fig. 7, the peripheral area BB is provided with 7 water absorbing portions 810. Wherein, the water absorbing part 810 located in the fourth peripheral area BB4 is connected to the first retaining wall 610 through two guiding structures 900.

In some embodiments, as shown in fig. 5 and fig. 7, the retaining wall structure 600 includes a first retaining wall 601, a second retaining wall 602, a third retaining wall 603, and a fourth retaining wall 604 connected end to end in sequence, and a joint between two adjacent retaining walls is a corner. At least one guide structure 900 is connected to a portion of the retaining wall structure 600 near the corner.

It should be explained that, considering that the circuit structure near the central line D1 and the central line D2 of the display panel 1001 is complicated, and the circuit structure at the corner is subjected to a large stress and is more likely to be broken under water-oxygen corrosion, as shown in fig. 7, one end of the guiding structure 900 is connected to a portion of each sub-retaining wall near the corner, and the other end is connected to one sub-portion 811 of each water absorbing portion 810 near the corner, so as to preferentially guide the moisture near the corner to the water absorbing structure 800, thereby improving the packaging performance of the display panel 1001.

In some embodiments, as shown in fig. 6, the water absorbing part 810 includes a plurality of sub-parts 811 and at least one connection part 812. Each sub-portion 811 is spaced circumferentially of the retaining wall structure 600. At least one connecting portion 812, two adjacent sub-portions 811 are connected by one connecting portion 812; the cross-sectional area of the connecting portion 812 is smaller than the cross-sectional area of the sub-portion 811 connected thereto in a direction perpendicular to the extension of the sub-portion 811. Thereby the transmission time of the interior steam of extension water absorption structure 800, based on retaining wall structure 600 and the condition that water absorption structure 800 is organic material, this structure can prolong the time that steam invades retaining wall structure 600 along signal line 122, reduces retaining wall structure 600, guide structure 800 and water absorption structure 900 combined action down for the probability of external steam of absorbing water on the contrary.

In some examples, the width of the connecting portion 812 is less than the width of the sub-portion 811. Thus, when the connecting portion 812 and the sub-portion 811 are made of the same material in the same layer, even if the thickness of the connecting portion 812 and the thickness of the sub-portion 811 are the same, the time for water vapor to intrude into the retaining wall structure 600 along the signal line 122 can be prolonged.

In other examples, the thickness of the connection portion 812 is equal to or less than the thickness of the sub portion 811. In this case, the connection portion 812 and the sub-portion 811 are formed using different layers of materials. For example, as shown in fig. 7, the sub-portion 811 is formed synchronously with the fabrication of the flat layer 11, and the connecting portion 812 is formed synchronously with the fabrication of the pixel defining layer 13, so that the thickness of the connecting portion 812 is smaller than that of the sub-portion 811.

Illustratively, as shown in fig. 9A, the width L2 of the cross section of each sub-portion 811 is 10 μm to 30 μm. For example, the width L2 of the cross section of each sub-portion 811 is 10 μm, 20 μm, or 30 μm. And the width of the cross section of each connection portion 812 is 10 μm to 20 μm. For example, the width of the cross section of each connection portion 812 is 10 μm, 15 μm, or 20 μm. Illustratively, the width L2 of the cross section of each sub-portion 811 is 30 μm, and the width of the cross section of each connecting portion 812 is 10 μm.

In some embodiments, the water absorbing structure 800 and the guiding structure 900 may also be disposed between the retaining wall structure 600 and the anti-crack retaining wall 700 in multiple circles, so as to improve the efficiency of guiding the water vapor in the retaining wall structure 600 to the water absorbing structure 800, and further improve the packaging performance of the display panel 1001. The arrangement positions of the water absorbing structure 800 and the guiding structure 900 of each turn of the plurality of turns are not limited, and the normal operation of each component on the display panel 1001 is not affected.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. The display panel is characterized by comprising a display area and a peripheral area surrounding the display area; the display panel includes:

the retaining wall structure is positioned in the peripheral area and surrounds the display area;

the signal wire penetrates through the retaining wall structure;

the water absorption structure is positioned on one side of the retaining wall structure, which is far away from the display area, and is arranged at an interval with the retaining wall structure; the water absorbing structure is configured to absorb water vapor;

one end of the guide structure is connected with the retaining wall structure, and the other end of the guide structure is connected with the water absorption structure; the guide structure is configured to guide water vapor in the retaining wall structure into the water absorption structure;

the water absorption structure comprises a plurality of water absorption parts, and each water absorption part is connected with the retaining wall structure through at least one guide structure;

the water absorption part comprises a plurality of sub-parts and at least one connecting part, and the plurality of sub-parts are arranged at intervals along the circumferential direction of the retaining wall structure; two adjacent sub-portions are connected through the connecting portion.

2. The display panel according to claim 1,

the material of the water absorbing structure comprises an organic material; and/or the presence of a gas in the gas,

the material of the guiding structure comprises an organic material.

3. The display panel according to claim 1, wherein the bank structure comprises at least one organic layer;

the material of the water absorbing structure is the same as the material of the at least one organic layer, and/or the material of the guiding structure is the same as the material of the at least one organic layer.

4. The display panel according to claim 3, wherein the display panel further comprises a flat layer and a pixel defining layer disposed on the flat layer; the flat layer comprises a first supporting part positioned in the peripheral area, the pixel defining layer comprises a second supporting part positioned in the peripheral area, and the first supporting part and the second supporting part are arranged in a stacked mode;

the at least one organic layer of the retaining wall structure comprises the first supporting part and the second supporting part;

the water absorption structure and the first supporting part are arranged on the same layer and are made of the same material; or,

the water absorption structure and the second supporting part are arranged on the same layer and are made of the same material; or,

the water absorption structure comprises a first part and a second part which are arranged in a stacked mode, wherein the first part and the first supporting part are arranged on the same layer and are made of the same material, and the second part and the second supporting part are arranged on the same layer and are made of the same material.

5. The display panel according to claim 3, wherein the bank structure further comprises an inorganic protective layer covering the at least one organic layer;

the inorganic protective layer also covers the water absorbing structure and the guide structure.

6. The display panel according to claim 5, wherein the display panel further comprises an encapsulation layer, the encapsulation layer comprising a first inorganic layer, an organic encapsulation layer, and a second inorganic layer, which are sequentially disposed;

a portion of the first inorganic layer and/or a portion of the second inorganic layer serves as the inorganic protective layer.

7. The display panel of claim 1~6 wherein the plurality of water-absorbing portions are spaced circumferentially along the retaining wall structure.

8. The display panel according to claim 7, wherein a cross-sectional area of the connection part is smaller than a cross-sectional area of a sub-part connected thereto in a direction perpendicular to an extending direction of the water absorption part.

9. The display panel according to claim 8, wherein a width of the connection portion is smaller than a width of the sub portion.

10. The display panel according to claim 7, wherein the retaining wall structure comprises a first sub-retaining wall, a second sub-retaining wall, a third sub-retaining wall and a fourth sub-retaining wall which are sequentially connected end to end, and the joint of two adjacent sub-retaining walls is a corner;

at least one of the guide structures is connected with a portion of the retaining wall structure near the corner.

11. The display panel of claim 1~6 wherein an orthographic projection of the signal line on a plane of the display panel is separated from an orthographic projection of the water absorbing structure on a plane of the display panel.

12. The display panel of any one of claims 1~6 wherein the display panel further comprises:

the array substrate comprises a substrate and an inorganic material lamination layer arranged on the substrate;

the anti-cracking retaining wall is positioned on one side, away from the display area, of the water absorption structure, and the anti-cracking retaining wall and the water absorption structure are arranged at intervals; at least part of the crack-resistant retaining wall is embedded in the inorganic material laminated layer, and the material of the crack-resistant retaining wall comprises an organic material.

13. The display panel according to claim 4, further comprising a spacer layer disposed on the pixel defining layer, wherein the spacer layer includes a third supporting portion located in the peripheral region, and wherein the first supporting portion, the second supporting portion, and the third supporting portion are stacked;

the retaining wall structure comprises a first retaining wall, and the first retaining wall comprises a first supporting part, a second supporting part and a third supporting part.

14. The display panel according to claim 13, wherein the pixel defining layer further comprises a fourth supporting portion located in a peripheral region, the fourth supporting portion being located on a side of the second supporting portion close to the display region; the spacer layer comprises a fifth supporting part positioned in the peripheral area, and the fifth supporting part is positioned on one side of the third supporting part close to the display area; the fourth supporting part and the fifth supporting part are arranged in a stacked mode;

the retaining wall structure further comprises a second retaining wall, and the second retaining wall comprises a fourth supporting part and a fifth supporting part; the second retaining wall is arranged on one side, close to the display area, of the first retaining wall at an interval, and the height of the first retaining wall is larger than that of the second retaining wall along the direction perpendicular to the plane where the display panel is located;

the water absorption structure is connected with the first retaining wall through the guide structure.

15. A display device comprising the display panel according to any one of claims 1 to 14.