Display panel, manufacturing method thereof and display device

Abstract

The invention provides a display panel, a manufacturing method thereof and a display device, relates to the technical field of display, and aims to solve the problems of orange peel mura and overflow existing in a packaging layer in a display product. In the display panel, a second blocking dam is located between a first blocking dam and a display area; the first inorganic packaging layer comprises at least two sub-film layers which are stacked, the first sub-film layer farthest from the substrate of the display panel has hydrophilicity, the second sub-film layer adjacent to the first sub-film layer has hydrophobicity, the second sub-film layer covers the display area and the non-display area, the first sub-film layer covers the display area, and the second sub-film layer covers the non-display area. The first sub-film layer covers a non-display area located between the first barrier dam and the display area, and the orthographic projection of the first sub-film layer on the substrate is not overlapped with the orthographic projection of the first barrier dam on the substrate; the organic packaging layer is located on the side, opposite to the substrate, of the first inorganic packaging layer and located on the side, away from the display area, of the boundary of the first blocking dam and facing the display area.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] With the continuous development of display technology, the application fields of display products are becoming more and more extensive, and higher requirements are placed on the production and use yield of display products. Taking organic electroluminescent diode display products as an example, the organic light-emitting materials and active metal electrodes in such display products are easily corroded by internal and external water vapor and oxygen, and oxidation reactions occur, causing the pixels in the display products to shrink or not emit light. Therefore, the display products are generally packaged for protection. At present, the encapsulation layer in the display product generally includes an inorganic encapsulation layer and an organic encapsulation layer arranged in a stacked manner, wherein the inorganic encapsulation layer can block water vapor and oxygen, and the organic encapsulation layer can meet the flatness requirements of the encapsulation layer. However, in the encapsulation layer of the above-mentioned structure, the organic encapsulation layer often has problems with orange peel mura and overflow. Summary of the invention

[0003] The object of the present invention is to provide a display panel and a manufacturing method thereof, and a display device, which are used to solve the problems of orange peel mura and overflow existing in the encapsulation layer of the display product.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A first aspect of the present invention provides a display panel, comprising a display area and a non-display area; the display panel further comprises:

[0006] a first barrier dam and a second barrier dam, wherein the first barrier dam and the second barrier dam are located in the non-display area, and the second barrier dam is located between the first barrier dam and the display area;

[0007] a first inorganic encapsulation layer, the first inorganic encapsulation layer comprising at least two sub-film layers stacked, wherein the first sub-film layer of the base substrate farthest from the display panel is hydrophilic, the second sub-film layer adjacent to the first sub-film layer is hydrophobic, the second sub-film layer covers the display area and the non-display area, the first blocking dam and the second blocking dam are both located between the second sub-film layer and the base substrate, the first sub-film layer covers the display area and the non-display area between the first blocking dam and the display area, and an orthographic projection of the first sub-film layer on the base substrate does not overlap with an orthographic projection of the first blocking dam on the base substrate;

[0008] An organic encapsulation layer is located on a side of the first inorganic encapsulation layer facing away from the base substrate and on a side of the first blocking dam facing the display area away from a boundary of the display area.

[0009] Optionally, the display panel further includes: a plurality of third barrier dams, the plurality of third barrier dams are located between the first barrier dam and the second barrier dam, and the plurality of third barrier dams are arranged at intervals along an extending direction of the first barrier dam.

[0010] Optionally, the third blocking dam includes a blocking portion and a connecting portion coupled to each other, the connecting portion is located between the blocking portion and the first blocking dam, the connecting portion is coupled to the blocking portion and the first blocking dam respectively, and an extension direction of the blocking portion intersects with an extension direction of the connecting portion.

[0011] Optionally, the display panel further includes a hole area; the non-display area includes a first sub-non-display area, and the first sub-non-display area surrounds the hole area; the first barrier dam and the second barrier dam are located in the first sub-non-display area, and the first barrier dam and the second barrier dam both surround the hole area;

[0012] The length W of the blocking portion along its own extending direction T Satisfy: 1≤W T ≤π(d+2d T ) / 3;

[0013] Wherein, d is the diameter of the circular area enclosed by the boundary of the first barrier dam away from the hole area; d T It is the length of the connecting portion along its own extending direction.

[0014] Optionally, the number n of the third barrier dams provided on the display panel satisfies: 3≤n≤π(d+2d T ) / W T .

[0015] Optionally, the blocking portion is an arc-shaped portion, the arc-shaped portion is bent toward the first blocking dam, and the arc-shaped portion and the adjacent portion of the first blocking dam have the same curvature; or, the arc-shaped portion is bent away from the first blocking dam.

[0016] Optionally, the non-display area includes a second sub-non-display area, and the second sub-non-display area surrounds the display area; and the first blocking dam and the second blocking dam are located in the second sub-non-display area.

[0017] Optionally, the blocking portion is a straight-line strip portion.

[0018] Based on the technical solution of the above display panel, a second aspect of the present invention provides a display device including the above display panel.

[0019] Based on the technical solution of the above display panel, a third aspect of the present invention provides a method for manufacturing a display panel, which is used to manufacture the above display panel, wherein the display panel includes a display area and a non-display area; the manufacturing method includes:

[0020] Manufacturing a first barrier dam and a second barrier dam, wherein the first barrier dam and the second barrier dam are located in the non-display area, and the second barrier dam is located between the first barrier dam and the display area;

[0021] At least two layers of inorganic encapsulation material sub-film layers are stacked on the side of the first blocking dam and the second blocking dam facing away from the base substrate, the first inorganic encapsulation material sub-film layer farthest from the base substrate is hydrophilic, and the second inorganic encapsulation material sub-film layer adjacent to the first inorganic encapsulation material layer is hydrophobic, the first inorganic encapsulation material sub-film layer is patterned to form a first sub-film layer, the first sub-film layer covers the display area and the non-display area between the first blocking dam and the display area, and the orthographic projection of the first sub-film layer on the base substrate does not overlap with the orthographic projection of the first blocking dam on the base substrate; the second inorganic encapsulation material sub-film layer is formed into a second sub-film layer, and the second sub-film layer covers the display area and the non-display area;

[0022] An organic encapsulation layer is manufactured. The organic encapsulation layer is located on a side of the first inorganic encapsulation layer facing away from the base substrate and on a side of the first blocking dam facing the display area away from a boundary of the display area.

[0023] In the technical solution provided by the present invention, the first inorganic encapsulation layer is provided to include at least two sub-film layers stacked together, wherein the first sub-film layer of the base substrate farthest from the display panel is hydrophilic, the second sub-film layer adjacent to the first sub-film layer is hydrophobic, the second sub-film layer covers the display area and the non-display area, the first sub-film layer covers the display area, and covers the non-display area between the first blocking dam and the display area, and the orthographic projection of the first sub-film layer on the base substrate does not overlap with the orthographic projection of the first blocking dam on the base substrate.

[0024] This arrangement allows the first hydrophilic sub-film layer located above the first blocking dam to be removed, while the second hydrophobic sub-film layer located above the first blocking dam is retained in the first inorganic encapsulation layer, so that during the manufacturing process of the organic encapsulation layer, when the organic encapsulation material flows to the first blocking dam, the second sub-film layer can increase the resistance of the organic encapsulation material to continue to flow toward the side of the first blocking dam away from the display area, thereby limiting the organic encapsulation material to the side of the first blocking dam facing the display area, effectively preventing overflow problems that occur during the manufacturing process of the organic encapsulation layer.

[0025] At the same time, the hydrophilic first sub-film layer covers the display area and the non-display area between the first blocking dam and the display area, so that the first inorganic encapsulation layer has better leveling properties, and the organic encapsulation layer subsequently formed on the first sub-film layer has better leveling properties, which can effectively prevent the organic encapsulation layer from generating orange peel mura.

[0026] Moreover, the second sub-film layer having hydrophobicity can completely cover the display area and the non-display area, thereby ensuring a good encapsulation effect of the first inorganic encapsulation layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0029] Figure 2 A schematic cross-sectional view of a hole area and a first sub non-display area of ​​a display panel provided in an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of the structure of each barrier dam provided in an embodiment of the present invention;

[0031] Figure 4 A schematic structural diagram of a third barrier dam provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to further illustrate the display panel and its manufacturing method, and the display device provided by the embodiments of the present invention, a detailed description is given below in conjunction with the accompanying drawings.

[0033] See also Figures 1 to 3 , an embodiment of the present invention provides a display panel, including a display area AA and a non-display area (such as a first sub-non-display area ND1 and a second sub-non-display area ND2); the display panel also includes:

[0034] a first barrier dam Dam1 and a second barrier dam Dam2, wherein the first barrier dam Dam1 and the second barrier dam Dam2 are located in the non-display area, and the second barrier dam Dam2 is located between the first barrier dam Dam1 and the display area AA;

[0035] The first inorganic encapsulation layer 30 includes at least two sub-film layers stacked together, wherein the first sub-film layer 301 of the substrate farthest from the display panel is hydrophilic, the second sub-film layer 302 adjacent to the first sub-film layer 301 is hydrophobic, the second sub-film layer 302 covers the display area AA and the non-display area, and the first blocking dam Dam1 and the

[0036] The second blocking dam Dam2 is located between the second sub-film layer 302 and the base substrate, the first sub-film layer 301 covers the display area AA, and covers the non-display area between the first blocking dam Dam1 and the display area AA, and the orthographic projection of the first sub-film layer 301 on the base substrate does not overlap with the orthographic projection of the first blocking dam Dam1 on the base substrate;

[0037] The organic encapsulation layer 40 is located on a side of the first inorganic encapsulation layer 30 facing away from the base substrate and on a side of the first blocking dam Dam1 away from a boundary of the display area AA and facing the display area AA.

[0038] Exemplarily, the substrate includes a glass substrate, a PI substrate, etc., but is not limited thereto.

[0039] Exemplarily, the display panel includes a display area AA and a non-display area, the non-display area includes a first sub-non-display area ND1 and a second sub-non-display area ND2; the display panel also includes a hole area hole, the first sub-non-display area ND1 surrounds the hole area hole; the second sub-non-display area ND2 surrounds the display area AA; at least a portion of the display area AA is located between the first sub-non-display area ND1 and the second sub-non-display area ND2.

[0040] Exemplarily, the display area AA includes a plurality of sub-pixels distributed in an array, which are used to realize the display function of the display panel. The first sub-non-display area ND1 is used to place sensing elements such as cameras; the second sub-non-display area ND2 is used to place control circuits and electronic components. The display area AA and the second sub-non-display area ND2 can be areas in the shape of rectangles, circles, ellipses or spline curves, wherein the second sub-non-display area ND2 can be used to place shift register circuits, auxiliary structures (such as crack blocking dams, etc.), flexible circuit boards, driver chips, etc. The display area DA and the non-display area ND can both have the ability to bend, bend, curl, etc. In the first sub-non-display area ND1, some partition structures can also be arranged on the side of the first blocking dam Dam1 facing the hole area hole to further enhance the packaging effect.

[0041] Exemplarily, the first barrier dam Dam1 and the second barrier dam Dam2 are located in the first sub-non-display area ND1; and / or, the first barrier dam Dam1 and the second barrier dam Dam2 are located in the second sub-non-display area ND2. In the first sub-non-display area ND1, the first barrier dam Dam1 and the second barrier dam Dam2 both surround the hole area hole, the first barrier dam Dam1 is located between the second barrier dam Dam2 and the hole area hole, and the second barrier dam Dam2 is located between the first barrier dam Dam1 and the display area AA. In the second sub-non-display area ND2, the first barrier dam Dam1 and the second barrier dam Dam2 both surround the display area AA, and the second barrier dam Dam2 is located between the first barrier dam Dam1 and the display area AA.

[0042] Exemplarily, the display panel includes a first inorganic encapsulation layer 30 , an organic encapsulation layer 40 and a second inorganic encapsulation layer stacked in sequence in a direction away from the base substrate, and the first blocking dam Dam1 and the second blocking dam Dam2 are used to prevent the organic encapsulation layer 40 from overflowing.

[0043] Exemplarily, the first inorganic packaging layer 30 includes at least two sub-film layers stacked together; for example: along the direction close to the base substrate, the first inorganic packaging layer 30 includes a first sub-film layer 301, a second sub-film layer 302 and other sub-film layers stacked in sequence, wherein the first sub-film layer 301 is hydrophilic, the second sub-film layer 302 is hydrophobic, and the hydrophilicity and hydrophobicity of other sub-film layers are not limited.

[0044] Exemplarily, the second sub-film layer 302 completely covers the display area AA and the non-display area. The second sub-film layer 302 mainly serves to isolate the intrusion of water vapor and oxygen. The first barrier dam Dam1 and the second barrier dam Dam2 are both located between the second sub-film layer 302 and the base substrate. The first sub-film layer 301 completely covers the display area AA, and covers the non-display area between the first barrier dam Dam1 and the display area AA. The orthographic projection of the first sub-film layer 301 on the base substrate does not overlap with the orthographic projection of the first barrier dam Dam1 on the base substrate. For the area on the side of the first barrier dam Dam1 away from the display area AA, whether the first sub-film layer 301 is set is not specifically limited. The function of the first sub-film layer 301 is to make the first inorganic encapsulation layer 30 more leveling.

[0045] Exemplarily, the first sub-film layer 301 includes a SiO sub-film layer, the second sub-film layer 302 includes a SiN sub-film layer, and the other sub-film layers include a SiNO sub-film layer; the SiN sub-film layer has better encapsulation performance and is more hydrophobic than the SiO sub-film layer. The hydrophilicity of the SiO sub-film layer makes the first inorganic encapsulation layer 30 more leveling and can prevent orange peel mura. The SiO sub-film layer located above the first barrier dam Dam1 is patterned and removed, and the SiN sub-film layer and the SiNO sub-film layer are retained, which can ensure that the first inorganic encapsulation layer 30 as a whole still has encapsulation performance. At the same time, the surface of the first inorganic encapsulation layer 30 above the first barrier dam Dam1 is more hydrophobic, which can prevent the subsequently manufactured organic encapsulation layer 40 (Ink jet printing, referred to as IJP film layer) from overflowing over the first barrier dam Dam1.

[0046] Exemplarily, the material of the sub-film layer in the first inorganic encapsulation layer 30 includes: inorganic insulating materials such as silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, titanium oxide, tantalum oxide, zinc oxide, hafnium oxide, and zirconium oxide. The first inorganic encapsulation layer 30 may include a double-layer or multi-layer stacked structure of the above materials, such as: it may have a stacked structure similar to SiNX / SiO2 or SiO2 / SiNX / SiO2.

[0047] According to the specific structure of the above-mentioned display panel, it can be known that in the display panel provided by an embodiment of the present invention, the first inorganic encapsulation layer 30 is provided to include at least two sub-film layers stacked, wherein the first sub-film layer 301 of the base substrate farthest from the display panel is hydrophilic, and the second sub-film layer 302 adjacent to the first sub-film layer 301 is hydrophobic, and the second sub-film layer 302 covers the display area AA and the non-display area, and the first sub-film layer 301 covers the display area AA and the non-display area between the first blocking dam Dam1 and the display area AA, and the orthographic projection of the first sub-film layer 301 on the base substrate does not overlap with the orthographic projection of the first blocking dam Dam1 on the base substrate.

[0048] This arrangement enables the hydrophilic first sub-film layer 301 located above the first barrier dam Dam1 in the first inorganic encapsulation layer 30 to be removed, while the hydrophobic second sub-film layer 302 located above the first barrier dam Dam1 is retained, so that during the manufacturing process of the organic encapsulation layer 40, when the organic encapsulation material flows to the first barrier dam Dam1, the second sub-film layer 302 can increase the resistance of the organic encapsulation material to continue to flow toward the side of the first barrier dam Dam1 away from the display area AA, thereby limiting the organic encapsulation material to the side of the first barrier dam Dam1 toward the display area AA, effectively preventing overflow problems of the organic encapsulation layer 40 during the manufacturing process.

[0049] At the same time, the hydrophilic first sub-film layer 301 covers the display area AA and the non-display area between the first blocking dam Dam1 and the display area AA, so that the first inorganic encapsulation layer 30 has better leveling properties, and the organic encapsulation layer 40 subsequently formed on the first sub-film layer 301 has better leveling properties, which can effectively prevent the organic encapsulation layer 40 from generating orange peel mura.

[0050] Moreover, the second sub-film layer 302 having hydrophobicity can completely cover the display area AA and the non-display area, thereby ensuring a good encapsulation effect of the first inorganic encapsulation layer 30 .

[0051] like Figure 3 and Figure 4 As shown, in some embodiments, the display panel further includes: a plurality of third barrier dams Dam3, the plurality of third barrier dams Dam3 are located between the first barrier dam Dam1 and the second barrier dam Dam2, and the plurality of third barrier dams Dam3 are arranged at intervals along the extension direction of the first barrier dam Dam1.

[0052] Exemplarily, the plurality of third barrier dams Dam3 are arranged at uniform intervals along the extending direction of the first barrier dam Dam1.

[0053] The display panel is configured as described above and further includes a plurality of third barrier dams Dam3, so that the third barrier dams Dam3 further slow down the flow of the organic encapsulation material overflowing over the second barrier dam Dam2 during the manufacturing process of the organic encapsulation layer 40, thereby further preventing the problem of the organic encapsulation layer 40 overflowing over the first barrier dam Dam1 during the manufacturing process.

[0054] like Figure 3 and Figure 4 As shown, in some embodiments, the third blocking dam Dam3 includes a blocking portion Dam31 and a connecting portion Dam32 coupled to each other, the connecting portion Dam32 is located between the blocking portion Dam31 and the first blocking dam Dam1, the connecting portion Dam32 is coupled to the blocking portion Dam31 and the first blocking dam Dam1 respectively, and an extension direction of the blocking portion Dam31 intersects with an extension direction of the connecting portion Dam32.

[0055] Exemplarily, the blocking portion Dam31 , the connecting portion Dam32 and the first blocking dam Dam1 are formed into an integrated structure, but the present invention is not limited thereto.

[0056] Exemplarily, the third barrier dam Dam3 is formed as a T-shaped dam, the barrier portion Dam31 is a transverse portion of the T-shaped dam, and the connecting portion Dam32 is a longitudinal portion of the T-shaped dam.

[0057] The third barrier dam Dam3 is configured to include the barrier portion Dam31 and the connecting portion Dam32, so that the extending direction of the barrier portion Dam31 intersects with the flow direction of the organic encapsulation material, which effectively enhances the blocking effect of the third barrier dam Dam3 on the overflow of the organic encapsulation material.

[0058] like Figures 2 to 4 As shown, in some embodiments, the display panel further includes a hole area hole; the non-display area includes a first sub non-display area ND1, and the first sub non-display area ND1 surrounds the hole area hole; the first blocking dam Dam1 and the second blocking dam Dam2 are located in the first sub non-display area ND1, and the first blocking dam Dam1 and the second blocking dam Dam2 both surround the hole area hole; the length W of the blocking portion Dam31 along its own extension direction T Satisfy: 1≤W T ≤π(d+2d T ) / 3; wherein d is the diameter of the circular area enclosed by the boundary of the first barrier dam Dam1 away from the hole area hole; d T It is the length of the connecting portion Dam32 along its own extending direction.

[0059] Exemplarily, the number n of the third barrier dams Dam3 provided on the display panel satisfies: 3≤n≤π(d+2d T ) / W T ; The value of n can be adjusted according to the size of the hole area.

[0060] For example, the width W of the blocking portion Dam31 in a direction perpendicular to its own extension direction is between 1 μm and 100 μm; the length d of the connecting portion Dam32 along its own extension direction is T Between 1μm and 100μm;

[0061] The above configuration reasonably arranges the third barrier dam Dam3 and enables the third barrier dam Dam3 to have a more appropriate size, thereby achieving a blocking effect while being compatible with the narrow frame layout requirement of the display panel.

[0062] like Figure 1 As shown, in some embodiments, the non-display area includes a second sub-non-display area ND2, which surrounds the display area AA; the first blocking dam Dam1 and the second blocking dam Dam2 are located in the second sub-non-display area ND2; and the plurality of third blocking dams Dam3 are arranged at intervals along the extension direction of the first blocking dam Dam1.

[0063] The above configuration enables the third barrier dam Dam3 to further slow down the flow of the organic encapsulation material overflowing over the second barrier dam Dam2 during the manufacturing process of the organic encapsulation layer 40, thereby further preventing the problem of the organic encapsulation layer 40 overflowing over the first barrier dam Dam1 during the manufacturing process.

[0064] It is worth noting that the specific shapes of the blocking portion Dam31 are varied.

[0065] like Figure 3 and Figure 4 As shown, in some embodiments, the blocking portion Dam31 is a straight strip portion. For example, the blocking portion Dam31 is formed in a rectangular shape, but is not limited thereto.

[0066] In some embodiments, the blocking portion Dam31 is an arc portion, which is bent toward the first blocking dam Dam1 and has the same curvature as the adjacent portion of the first blocking dam Dam1; or, the arc portion is bent away from the first blocking dam Dam1.

[0067] For example, the center of the hole area hole is taken as the center of the circle, and (d+2d T ) is the diameter, forming a virtual ring, π(d+2d T) is the circumference of the virtual ring. In the case where the blocking portion Dam31 is an arc portion that curves toward the first blocking dam Dam1, the blocking portion Dam31 may be arranged to at least partially overlap with the virtual ring.

[0068] Setting the blocking portion Dam31 as a straight strip portion or an arc portion can achieve a good blocking effect. Setting the blocking portion Dam31 as an arc portion and making the arc portion bend toward the first blocking dam Dam1 can better reduce the layout space occupied by the third blocking portion Dam31 between the first blocking portion Dam31 and the second blocking portion Dam31, which is conducive to achieving a narrow frame of the display panel.

[0069] An embodiment of the present invention further provides a display device, comprising the display panel provided by the above embodiment.

[0070] It should be noted that the display device can be any product or component with a display function, such as a television, a monitor, a digital photo frame, a mobile phone, a tablet computer, etc., wherein the display device also includes a flexible circuit board, a printed circuit board and a backplane, etc.

[0071] In the display panel provided in the above embodiment, the hydrophilic first sub-film layer 301 located above the first barrier dam Dam1 in the first inorganic encapsulation layer 30 is removed, and the hydrophobic second sub-film layer 302 located above the first barrier dam Dam1 is retained, so that when the organic encapsulation material flows to the first barrier dam Dam1 during the manufacturing process of the organic encapsulation layer 40, the second sub-film layer 302 can increase the resistance of the organic encapsulation material to continue to flow toward the side of the first barrier dam Dam1 away from the display area AA, so that the organic encapsulation material can be limited to the side of the first barrier dam Dam1 facing the display area AA, effectively preventing the overflow problem of the organic encapsulation layer 40 during the manufacturing process. At the same time, the hydrophilic first sub-film layer 301 covers the display area AA and the non-display area between the first barrier dam Dam1 and the display area AA, so that the first inorganic encapsulation layer 30 has better leveling properties, so that the organic encapsulation layer 40 subsequently formed on the first sub-film layer 301 has better leveling properties, which can effectively prevent the organic encapsulation layer 40 from generating orange peel mura. Moreover, the second sub-film layer 302 having hydrophobicity can completely cover the display area AA and the non-display area, thereby ensuring a good encapsulation effect of the first inorganic encapsulation layer 30 .

[0072] Therefore, when the display device provided by the embodiment of the present invention includes the above-mentioned display panel, it also has the above-mentioned beneficial effects, which will not be described in detail here.

[0073] An embodiment of the present invention further provides a method for manufacturing a display panel, which is used to manufacture the display panel provided in the above embodiment, wherein the display panel includes a display area AA and a non-display area; the manufacturing method includes:

[0074] manufacturing a first barrier dam Dam1 and a second barrier dam Dam2, wherein the first barrier dam Dam1 and the second barrier dam Dam2 are located in the non-display area, and the second barrier dam Dam2 is located between the first barrier dam Dam1 and the display area AA;

[0075] At least two layers of inorganic encapsulating material sub-film layers are stacked on the side of the first blocking dam Dam1 and the second blocking dam Dam2 facing away from the base substrate, the first inorganic encapsulating material sub-film layer farthest from the base substrate is hydrophilic, and the second inorganic encapsulating material sub-film layer adjacent to the first inorganic encapsulating material layer is hydrophobic, the first inorganic encapsulating material sub-film layer is patterned to form a first sub-film layer 301, the first sub-film layer 301 covers the display area AA and the non-display area between the first blocking dam Dam1 and the display area AA, the orthographic projection of the first sub-film layer 301 on the base substrate does not overlap with the orthographic projection of the first blocking dam Dam1 on the base substrate; the second inorganic encapsulating material sub-film layer is formed into a second sub-film layer 302, and the second sub-film layer 302 covers the display area AA and the non-display area;

[0076] An organic encapsulation layer 40 is manufactured. The organic encapsulation layer 40 is located on a side of the first inorganic encapsulation layer 30 facing away from the base substrate and on a side of the first barrier dam Dam1 away from a boundary of the display area AA and facing the display area AA.

[0077] Exemplarily, the step of patterning the first inorganic packaging material sub-film layer to form the first sub-film layer 301 specifically includes: forming a photoresist layer on the first inorganic packaging material sub-film layer, exposing and developing the photoresist layer to form a photoresist pattern, etching the first inorganic packaging material sub-film layer using the photoresist pattern as a mask to form the first sub-film layer 301, and finally removing the photoresist pattern.

[0078] In the display panel manufactured by the manufacturing method provided by the embodiment of the present invention, the first inorganic encapsulation layer 30 includes at least two sub-film layers stacked together, wherein the first sub-film layer 301 of the base substrate farthest from the display panel is hydrophilic, and the second sub-film layer 302 adjacent to the first sub-film layer 301 is hydrophobic, the second sub-film layer 302 covers the display area AA and the non-display area, the first sub-film layer 301 covers the display area AA, and covers the non-display area between the first blocking dam Dam1 and the display area AA, and the orthographic projection of the first sub-film layer 301 on the base substrate does not overlap with the orthographic projection of the first blocking dam Dam1 on the base substrate.

[0079] In the display panel manufactured by the manufacturing method provided by the embodiment of the present invention, the hydrophilic first sub-film layer 301 located above the first barrier dam Dam1 in the first inorganic encapsulation layer 30 is removed, and the hydrophobic second sub-film layer 302 located above the first barrier dam Dam1 is retained, so that when the organic encapsulation material flows to the first barrier dam Dam1 during the manufacturing process of the organic encapsulation layer 40, the second sub-film layer 302 can increase the resistance of the organic encapsulation material to continue to flow toward the side of the first barrier dam Dam1 away from the display area AA, so that the organic encapsulation material can be limited to the side of the first barrier dam Dam1 facing the display area AA, effectively preventing the overflow problem of the organic encapsulation layer 40 during the manufacturing process. At the same time, the hydrophilic first sub-film layer 301 covers the display area AA and the non-display area between the first barrier dam Dam1 and the display area AA, so that the first inorganic encapsulation layer 30 has better leveling properties, so that the organic encapsulation layer 40 subsequently formed on the first sub-film layer 301 has better leveling properties, and can effectively prevent the organic encapsulation layer 40 from generating orange peel mura. Moreover, the second sub-film layer 302 having hydrophobicity can completely cover the display area AA and the non-display area, thereby ensuring a good encapsulation effect of the first inorganic encapsulation layer 30 .

[0080] It should be noted that the structure extending along a certain direction means that: the structure includes a main part and a secondary part connected to the main part, the main part is a line, a line segment or a strip-shaped body, the main part extends along a certain direction, and the length of the main part extending along the certain direction is greater than the length of the secondary part extending along other directions.

[0081] It should be noted that the "same layer" in the embodiment of the present invention may refer to a film layer on the same structural layer. Or, for example, a film layer on the same layer may be a film layer for forming a specific pattern formed by the same film forming process, and then the film layer is patterned by the same mask through a single composition process to form a layer structure. Depending on the specific pattern, a single composition process may include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous. These specific patterns may also be at different heights or have different thicknesses.

[0082] In the various method embodiments of the present invention, the serial numbers of the steps cannot be used to limit the sequence of the steps. For ordinary technicians in this field, without paying creative work, changes to the sequence of the steps are also within the protection scope of the present invention.

[0083] It should be noted that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the method embodiment, since it is basically similar to the product embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the product embodiment.

[0084] Unless otherwise defined, the technical terms or scientific terms used in this disclosure should be understood by people with ordinary skills in the field to which the present invention belongs. "First", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect", "couple" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0085] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “under” another element, it can be “directly on” or “under” the other element or intervening elements may be present.

[0086] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0087] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A display panel, characterized in that: It includes a display area and a non-display area; the display panel also includes: a first barrier dam and a second barrier dam, wherein the first barrier dam and the second barrier dam are located in the non-display area, and the second barrier dam is located between the first barrier dam and the display area; a first inorganic encapsulation layer, the first inorganic encapsulation layer comprising at least two sub-film layers stacked, wherein the first sub-film layer of the base substrate farthest from the display panel is hydrophilic, the second sub-film layer adjacent to the first sub-film layer is hydrophobic, the second sub-film layer covers the display area and the non-display area, the first blocking dam and the second blocking dam are both located between the second sub-film layer and the base substrate, the first sub-film layer covers the display area and the non-display area between the first blocking dam and the display area, and an orthographic projection of the first sub-film layer on the base substrate does not overlap with an orthographic projection of the first blocking dam on the base substrate; An organic encapsulation layer is located on a side of the first inorganic encapsulation layer facing away from the base substrate and on a side of the first blocking dam facing the display area away from a boundary of the display area.

2. The display panel according to claim 1, characterized in that: The display panel further includes: A plurality of third barrier dams are provided, wherein the plurality of third barrier dams are located between the first barrier dam and the second barrier dam, and the plurality of third barrier dams are arranged at intervals along an extending direction of the first barrier dam.

3. The display panel according to claim 2, characterized in that: The third blocking dam includes a blocking portion and a connecting portion coupled to each other, the connecting portion is located between the blocking portion and the first blocking dam, the connecting portion is coupled to the blocking portion and the first blocking dam respectively, and an extending direction of the blocking portion intersects with an extending direction of the connecting portion.

4. The display panel according to claim 3, characterized in that: The display panel further includes a hole area; the non-display area includes a first sub-non-display area, and the first sub-non-display area surrounds the hole area; the first barrier dam and the second barrier dam are located in the first sub-non-display area, and the first barrier dam and the second barrier dam both surround the hole area; The length W of the blocking portion along its own extending direction T Satisfy: 1≤W T ≤π(d+2d T ) / 3; Wherein, d is the diameter of the circular area enclosed by the boundary of the first barrier dam away from the hole area; d T It is the length of the connecting portion along its own extending direction.

5. The display panel according to claim 4, characterized in that: The number n of the third barrier dams provided on the display panel satisfies: 3≤n≤π(d+2d T ) / W T .

6. The display panel according to claim 4 or 5, characterized in that: The blocking portion is an arc-shaped portion, the arc-shaped portion is bent toward the first blocking dam, and the arc-shaped portion and the adjacent portion of the first blocking dam have the same curvature; or the arc-shaped portion is bent away from the first blocking dam.

7. The display panel according to claim 3, characterized in that: The non-display area includes a second sub-non-display area, and the second sub-non-display area surrounds the display area; the first barrier dam and the second barrier dam are located in the second sub-non-display area.

8. The display panel according to any one of claims 3 to 5 and 7, characterized in that: The blocking portion is a straight-line strip portion.

9. A display device, characterized in that: The invention comprises the display panel according to any one of claims 1 to 8.

10. A method for manufacturing a display panel, characterized in that: Used to manufacture a display panel according to any one of claims 1 to 8, wherein the display panel comprises a display area and a non-display area; the manufacturing method comprises: Manufacturing a first barrier dam and a second barrier dam, wherein the first barrier dam and the second barrier dam are located in the non-display area, and the second barrier dam is located between the first barrier dam and the display area; At least two layers of inorganic encapsulation material sub-film layers are stacked on the side of the first blocking dam and the second blocking dam facing away from the base substrate, the first inorganic encapsulation material sub-film layer farthest from the base substrate is hydrophilic, and the second inorganic encapsulation material sub-film layer adjacent to the first inorganic encapsulation material layer is hydrophobic, the first inorganic encapsulation material sub-film layer is patterned to form a first sub-film layer, the first sub-film layer covers the display area and the non-display area between the first blocking dam and the display area, and the orthographic projection of the first sub-film layer on the base substrate does not overlap with the orthographic projection of the first blocking dam on the base substrate; the second inorganic encapsulation material sub-film layer is formed into a second sub-film layer, and the second sub-film layer covers the display area and the non-display area; An organic encapsulation layer is manufactured. The organic encapsulation layer is located on a side of the first inorganic encapsulation layer facing away from the base substrate and on a side of the first blocking dam facing the display area away from a boundary of the display area.

Images