An OLED display panel and a preparation method of the OLED display panel

Abstract

The application discloses an OLED display panel and a preparation method of the OLED display panel. The OLED display panel comprises a substrate, the substrate comprises a display area and a frame area arranged on the side of the display area; a flat layer is arranged on the substrate; a pixel definition layer is arranged on the flat layer, and the pixel definition layer is provided with a first protruding part in the frame area; a cover plate is arranged on the side of the substrate provided with the pixel definition layer and is arranged opposite to the substrate; a first encapsulating part extends from the display area to the frame area, and the first encapsulating part covers at least part of the first protruding part; and a second encapsulating part is arranged around the first encapsulating part. The first protruding part is arranged in the frame area, and then the first encapsulating part covers the first protruding part, so that the first encapsulating part can stand stably above the flat layer without tilting, thereby improving the sealing property of the encapsulating layer and avoiding water and oxygen intrusion.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to an OLED display panel and a preparation method of the OLED display panel. BACKGROUND

[0002] OLED is a current type light-emitting device, and mainly includes an anode, a cathode and an organic material functional layer. The main working principle of the OLED is that the organic material functional layer emits light through carrier injection and recombination under the driving of an electric field formed by the anode and the cathode.

[0003] The existing OLED display panel includes a TFT array substrate including a TFT driving circuit and a plurality of OLED display devices arranged on the TFT array substrate, and each OLED display device is controlled by a corresponding TFT. The OLED package generally adopts a metal thin film package to block water and oxygen invasion, and has good blocking effect and is widely used in small and medium-sized product applications. However, the metal thin film package can only be used in bottom emission type electroluminescent products, and the electroluminescent products with high requirements on color gamut generally adopt a top emission type backplane structure. Since the metal thin film has poor light transmission, it will affect the light-emitting efficiency of the OLED, and therefore, in the electroluminescent products with the emission type backplane structure, a packaging method of the frame glue and the filling glue is generally adopted.

[0004] In the packaging method of the frame glue and the filling glue, the frame glue material is generally attached to the inorganic film, but during the manufacturing process of the backplane, a planar layer needs to be manufactured, and the planar layer is also an inorganic material and is prone to residual on the inorganic film in the area attached with the frame glue material, thereby causing poor sealing of the frame glue. In addition, in order to ensure the water and oxygen absorption effect, a moisture absorption glue is arranged between the frame glue and the filling glue, but the moisture absorption glue is unstable on the planar layer and has poor sealing, thereby easily leading to water and oxygen invasion. SUMMARY

[0005] The present application provides an OLED display panel and a preparation method of the OLED display panel to improve the packaging sealing of the display panel.

[0006] The present application provides an OLED display panel, which includes:

[0007] a substrate, the substrate including a display area and a frame area arranged on the periphery of the display area;

[0008] a planar layer arranged on the substrate;

[0009] a pixel definition layer arranged on the planar layer, the pixel definition layer being provided with a first protruding portion in the frame area;

[0010] A cover plate is disposed on the side of the substrate provided with the pixel definition layer and opposite to the substrate;

[0011] A first encapsulation part is filled between the pixel definition layer and the cover plate and extends from the display area to the frame area, and the first encapsulation part covers at least part of the first protruding part;

[0012] A second encapsulation part is filled between the pixel definition layer and the cover plate and is disposed around the first encapsulation part.

[0013] Optionally, in some embodiments of the present application, the pixel definition layer comprises a first pixel definition layer and a second pixel definition layer, the first pixel definition layer covers the planar layer, the second pixel definition layer is disposed on the first pixel definition layer and located in the display area, and the first pixel definition layer is provided with a first protruding part in part of the frame area.

[0014] Optionally, in some embodiments of the present application, the material of the first pixel definition layer is inorganic material.

[0015] Optionally, in some embodiments of the present application, the material of the second pixel definition layer is organic material.

[0016] Optionally, in some embodiments of the present application, the OLED display panel further comprises a first electrode layer, the first electrode layer is disposed on the planar layer, the pixel definition layer is disposed on the first electrode layer, the first electrode layer comprises an anode and a second protruding part, the pixel definition layer is provided with an opening in the display area, the anode is disposed in the opening, the second protruding part is located in the frame area, and the pixel definition layer covers the second protruding part in part of the frame area.

[0017] Optionally, in some embodiments of the present application, the planar layer is provided with a second protruding part in the frame area, and the pixel definition layer covers the second protruding part in part of the frame area.

[0018] Optionally, in some embodiments of the present application, the first protruding part covers the second protruding part.

[0019] Optionally, in some embodiments of the present application, the number of the first protruding parts is at least two, the part between adjacent first protruding parts of the pixel definition layer is a recessed part, and the recessed part covers the second protruding part.

[0020] Optionally, in some embodiments of the present application, the second encapsulation part comprises a frame adhesive, and the first encapsulation part comprises a filling adhesive.

[0021] Optionally, in some embodiments of the present application, the first encapsulation part further comprises a moisture absorption glue, the moisture absorption glue is filled in the frame area, and the second encapsulation part is located in the frame area and is arranged around the filling glue and the moisture absorption glue.

[0022] Optionally, in some embodiments of the present application, the moisture absorption glue is arranged between the second encapsulation part and the filling glue, the moisture absorption glue is filled between the pixel definition layer and the cover plate and covers at least part of the first protruding part, and the first encapsulation part covers the remaining part of the first protruding part.

[0023] Optionally, in some embodiments of the present application, the filling glue extends from the display area to the frame area and abuts against the second encapsulation part, the moisture absorption glue is filled between part of the frame area and the pixel definition layer, and the moisture absorption glue covers the first protruding part.

[0024] Correspondingly, the present application further provides a preparation method of an OLED display panel, comprising the following steps:

[0025] providing a substrate, the substrate comprising a display area and a frame area arranged on the side of the display area;

[0026] forming a planar layer on the substrate;

[0027] forming a pixel definition layer on the planar layer, the pixel definition layer being provided with a first protruding part in the frame area;

[0028] providing a cover plate, forming an encapsulation material on the cover plate, aligning and pressing the cover plate and the substrate in a manner that the encapsulation material is located between the cover plate and the substrate, and curing the encapsulation material to form a second encapsulation part and a first encapsulation part, the first encapsulation part being filled between the pixel definition layer and the cover plate and extending from the display area to the frame area, and the second encapsulation part being filled between the pixel definition layer and the cover plate and arranged around the first encapsulation part, the first encapsulation part covering at least part of the first protruding part.

[0029] The application provides an OLED display panel and a preparation method of the OLED display panel. The OLED display panel comprises a substrate, a flat layer, a pixel definition layer, a cover plate, a first encapsulation part and a second encapsulation part. The substrate comprises a display area and a frame area arranged on the side of the display area. The flat layer is arranged on the substrate. The pixel definition layer is arranged on the flat layer. The pixel definition layer is provided with a first protruding part in the frame area. The cover plate is arranged on the side of the substrate provided with the pixel definition layer and is arranged opposite to the substrate. The first encapsulation part is filled between the pixel definition layer and the cover plate and extends from the display area to the frame area. The first encapsulation part covers at least part of the first protruding part. The second encapsulation part is filled between the pixel definition layer and the cover plate and is arranged around the first encapsulation part. The first protruding part is arranged in the frame area of the pixel definition layer, and then the first encapsulation part covers at least part of the first protruding part, so that the first encapsulation part can stand stably above the flat layer without tilting, thereby improving the sealing property of the encapsulation and avoiding water and oxygen intrusion. In addition, the first protruding part is made by the same layer as the pixel definition layer, without the need of adding a film layer structure or film layer material, thereby reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0031] Figure 1 The schematic diagram of the first structure of the OLED display panel provided by the application is shown in the figure.

[0032] Figure 2 The flow chart of the first embodiment of the preparation method of the OLED display panel provided by the application is shown in the figure.

[0033] Figure 3 The schematic diagram of the second structure of the OLED display panel provided by the application is shown in the figure.

[0034] Figure 4 The schematic diagram of the third structure of the OLED display panel provided by the application is shown in the figure.

[0035] Figure 5 The schematic diagram of the fourth structure of the OLED display panel provided by the application is shown in the figure.

[0036] Figure 6 The schematic diagram of the fifth structure of the OLED display panel provided by the application is shown in the figure.

[0037] Figure 7A schematic view of a sixth structure of the OLED display panel provided in the present application is shown in FIG. 6.

[0038] Figure 8 A schematic view of a seventh structure of the OLED display panel provided in the present application is shown in FIG. 7.

[0039] Figure 9 A schematic view of an eighth structure of the OLED display panel provided in the present application is shown in FIG. 8. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described in the present application with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that the terms "center", "length", "width", "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0042] The present application provides an OLED display panel 100 and a manufacturing method of the OLED display panel 100, which will be described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments of the present application.

[0043] Please refer to Figure 1 , Figure 1 A schematic view of a first structure of the OLED display panel 100 provided in the present application is shown in FIG. 1. The present application provides an OLED display panel 100, which comprises a substrate 10, a planar layer 20, a pixel definition layer 30, a cover plate 50, a first encapsulation part 60 and a second encapsulation part 40.

[0044] The substrate 10 includes a display area 11 and a frame area 12 arranged around the display area 11; the substrate can be a flexible substrate including a single-layer flexible organic layer or two or more flexible organic layers. The material of the flexible organic layer is selected from one or more of polyimide, polyethylene naphthalate, polyethylene terephthalate, polyarylate, polycarbonate, polyetherimide, and polyethersulfone.

[0045] The flat layer 20 is arranged on the substrate 10. The material of the flat layer 20 can be selected from silicon dioxide, nitrogen dioxide, silicon oxynitride, and a stack thereof or an organic material such as an acrylic resin.

[0046] The pixel definition layer 30 is arranged on the flat layer 20, and the pixel definition layer 30 is provided with a first protruding portion 31 in the frame area 12.

[0047] The cover plate 50 is arranged on the side of the substrate 10 provided with the pixel definition layer 30 and opposite to the substrate 10. The cover plate 50 can be a transparent glass, a transparent plastic, or a metal cover plate 50, which is used to protect other elements of the OLED display panel 100.

[0048] The first encapsulating portion 60 is filled between the pixel definition layer 30 and the cover plate 50 and extends from the display area 11 to the frame area 12, and the first encapsulating portion 60 covers at least part of the first protruding portion 31; the second encapsulating portion 40 is arranged between the pixel definition layer 30 and the cover plate 50 and surrounds the first encapsulating portion 60. The first encapsulating portion 60 and the second encapsulating portion 40 are used to adhere the substrate 10 and the cover plate 50 and encapsulate, while preventing water vapor from invading.

[0049] The present application provides the first protruding portion 31 in the frame area 12 through the pixel definition layer 30, and then covers the first protruding portion 31 with the first encapsulating portion 60, so that the first encapsulating portion can stand stably above the flat layer 20 without tilting, thereby improving the sealing property of encapsulation and avoiding water and oxygen invasion. In addition, the first protruding portion 31 is made by the same layer as the pixel definition layer 30, without the need to add a film layer structure or a film layer material, thereby reducing the cost.

[0050] In some embodiments, the number of first protruding portions 31 is at least two, and the spacing between adjacent first protruding portions 31 is equal to or greater than 500 microns. For example, the number of first protruding portions 31 is three, and the spacing between adjacent first protruding portions 31 is 600 microns. The shape of the first protruding portion 31 can be a protruding structure with a square cross section, or a protruding structure with a triangular or other polygonal cross section.

[0051] Further, in some embodiments, the thickness of the flat layer 20 in the display area 11 is greater than the thickness of the flat layer 20 in the frame area 12. By designing the thickness of the flat layer 20 in the display area 11 to be greater than the thickness of the flat layer 20 in the frame area 12, sufficient packaging space can be left for the frame area 12, which is conducive to reducing the overall thickness of the display panel.

[0052] Further, in some embodiments, the thickness of the pixel definition layer 30 in the display area 11 is greater than the thickness of the pixel definition layer 30 in the frame area 12.

[0053] In some embodiments, the OLED display panel 100 further comprises a first passivation layer 81 between the substrate 10 and the flat layer 20. The first passivation layer converts the metal surface of the substrate 10 into a state that is not easily oxidized, thereby slowing down the corrosion rate. The first passivation layer 81 comprises an inorganic layer or an organic layer. The material of the inorganic layer can be selected from aluminum oxide, silicon oxide, silicon nitride, silicon oxynitride, silicon carbide, titanium oxide, zirconium oxide, zinc oxide, etc. The material of the organic layer can be selected from epoxy resin, polyimide, polyethylene terephthalate, polycarbonate, polyethylene, polyacrylate, etc.

[0054] In some embodiments, the OLED display panel 100 further comprises an organic light-emitting device comprising an anode 71, a cathode 73, and an organic light-emitting portion 72 disposed between the anode 71 and the cathode 73, the pixel definition layer 30 is provided with an opening 32 in the display area 11, the anode 71 and the organic light-emitting portion 72 are disposed in the opening 32, the cathode 73 covers the pixel definition layer 30 and is connected to the organic light-emitting portion 72 through the opening 32, and the OLED display panel 100 further comprises a second passivation layer 82 covering the cathode 73. The second passivation layer 82 is located in the display area 11 and covers the cathode 73. Specifically, the orthographic projection of the second passivation layer 82 on the cathode 73 covers the cathode 73. The second passivation layer 82 converts the metal surface of the cathode 73 into a state that is not easily oxidized, thereby slowing down the corrosion rate. The second passivation layer comprises an inorganic layer or an organic layer. The material of the inorganic layer can be selected from aluminum oxide, silicon oxide, silicon nitride, silicon oxynitride, silicon carbide, titanium oxide, zirconium oxide, zinc oxide, etc. The material of the organic layer can be selected from epoxy resin, polyimide, polyethylene terephthalate, polycarbonate, polyethylene, polyacrylate, etc.

[0055] In some embodiments, the second encapsulation part 40 comprises a frame glue, and the first encapsulation part 60 comprises a filling glue. The filling glue comprises an organic material such as epoxy resin or acrylic resin. The frame glue comprises an organic material such as epoxy resin or acrylic resin. The frame glue can be a high water-resistance resin material. The high water-resistance means that the water-oxygen permeability of the frame glue is less than or equal to 60 g / (m2·24h). The filling glue has a first viscosity, and the frame glue has a second viscosity. The first viscosity is less than the second viscosity. For example, the filling glue is in a liquid state, and the frame glue is in a solid state, i.e., a paste.

[0056] Further, in some embodiments, hygroscopic particles are added in the second encapsulation part 40, which can absorb water vapor entering the OLED display panel 100 from the outside.

[0057] Please refer to Figure 2 , Figure 2 This is a flowchart of a first embodiment of a preparation method of the OLED display panel 100 provided in the present application. The present application also provides a preparation method of an OLED display panel 100, which comprises the following steps:

[0058] S10, providing a substrate 10, wherein the substrate 10 comprises a display area 11 and a frame area 12 arranged around the display area 11;

[0059] S20, forming a planar layer 20 on the substrate 10;

[0060] S30, forming a pixel definition layer 30 on the planar layer 20, wherein the pixel definition layer 30 is provided with a first protruding part 31 in the frame area 12;

[0061] S40, providing a cover plate 50, forming an encapsulation material on the cover plate 50, aligning and pressing the cover plate 50 and the substrate 10 in a manner that the encapsulation material is located between the cover plate 50 and the substrate 10, and curing the encapsulation material to form a second encapsulation part 40 and a first encapsulation part 60, wherein the first encapsulation part 60 is filled between the pixel definition layer 30 and the cover plate 50 and extends from the display area 11 to the frame area 12, the second encapsulation part 40 is filled between the pixel definition layer 30 and the cover plate 50 and is arranged around the first encapsulation part 60, and the first encapsulation part 60 covers at least part of the first protruding part 31.

[0062] Please refer to Figure 3 , Figure 3 This is a schematic diagram of a second structure of the OLED display panel 100 provided in the present application. This embodiment is different from the first structure in that the first protruding part 31 is arranged in the frame area 12. Figure 1The difference between the provided OLED display panel 100 is that the pixel definition layer 30 includes a first pixel definition layer 33 and a second pixel definition layer 34, the first pixel definition layer 33 covers the flat layer 20, the second pixel definition layer 34 is arranged on the first pixel definition layer 33 and located in the display area 11, and the first pixel definition layer 33 is provided with a first protruding part 31 in part of the frame area 12.

[0063] The present application sets the pixel definition layer 30 as a structure composed of the first pixel definition layer 33 and the second pixel definition layer 34, and only the first pixel definition layer 33 covers the display area 11 and the frame area 12 at the same time, which is beneficial to optimize the design of the display panel and reduce the thickness of the display panel, and the first pixel definition layer 33 and the second pixel definition layer 34 can adopt different material structures.

[0064] In addition, the material of the first pixel definition layer 33 is inorganic material, and the material of the second pixel definition layer 34 is organic material. The inorganic material can be selected from aluminum oxide, silicon oxide, silicon nitride, silicon oxynitride, silicon carbide, titanium oxide, zirconium oxide, zinc oxide, etc. The organic material can be selected from epoxy resin, polyimide, polyethylene terephthalate, polycarbonate, polyethylene, polyacrylate, etc. Of course, when the first pixel definition layer 33 and the second pixel definition layer 34 adopt different materials, the material of the first pixel definition layer 33 can also be organic material, and the material of the second pixel definition layer 34 can also be inorganic material. In addition, in other embodiments of the present application, the first pixel definition layer 33 and the first pixel definition layer 33 can also adopt the same or same type of material, that is, the first pixel definition layer 33 and the second pixel definition layer 34 simultaneously adopt organic material, or the materials of the first pixel definition layer 33 and the second pixel definition layer 34 are the same, wherein the second pixel definition layer 34 adopts organic material which is compatible with printing ink, prevents the ink of the printed light-emitting layer from overflowing, and ensures the uniformity of the ink film.

[0065] Please refer to Figure 4 , Figure 4 The third structure of the OLED display panel 100 provided by the present application is shown in the schematic diagram, and the present embodiment is different from Figure 1 The difference between the provided OLED display panel 100 is that the OLED display panel 100 further includes a first electrode layer 90, the first electrode layer 90 is arranged on the flat layer 20, the first electrode layer 90 includes an anode 71 and a second protruding part 91, the pixel definition layer 30 is provided with an opening 32 in the display area 11, the anode 71 is arranged in the opening 31, the second protruding part 91 is located in the frame area 12, and the pixel definition layer 30 covers the second protruding part 91 in part of the frame area 12.

[0066] The first electrode layer 90 of the present application comprises the anode 71 and the second protruding part 91 arranged in the same layer, and the pixel definition layer 30 covers the second protruding part 91, which is beneficial to improve the adhesion of the pixel definition layer 30 in the frame area 12 and prevent the pixel definition layer 30 from being displaced or slipped. In addition, no new film layer structure or film layer material is needed, which is beneficial to reduce the cost.

[0067] In some embodiments, the shape of the second protruding part 91 can be a protruding structure with a square cross section, or a protruding structure with a triangular or other polygonal cross section. The protruding structure can further improve the adhesion and bonding degree between the pixel definition layer 30 and the second protruding part 91, while preventing the pixel definition layer 30 from being displaced or slipped.

[0068] Further, in some embodiments, the first protruding part 31 covers the second protruding part 91, so that the second protruding part 91 can have a higher height without affecting the thickness of the display panel, and the contact area of the first protruding part 31 and the second protruding part 91 can be increased, further improving the adhesion between the pixel definition layer 30 and the second protruding part 91. As a preferred, the first protruding part 31 and the second protruding part 91 have the same shape, for example, both the first protruding part 31 and the second protruding part 91 are cylindrical. In other embodiments of the present application, the first protruding part 31 and the second protruding part 91 can have different shapes.

[0069] Please refer to Figure 5 , Figure 5 the fourth structure of the OLED display panel 100 provided by the present application, which is different from the OLED display panel 100 provided by Figure 1 the fourth structure of the OLED display panel 100 provided by the present application, which is different from the OLED display panel 100 provided by

[0070] The present application is beneficial to improve the adhesion of the pixel definition layer 30 in the frame area 12 and prevent the pixel definition layer 30 from being displaced or slipped by arranging the second protruding part 21 on the flat layer 20 in the frame area 12 and covering the second protruding part 21 with the pixel definition layer 30. In addition, no new film layer structure or film layer material is needed, which is beneficial to reduce the cost.

[0071] In some embodiments, the shape of the second protruding part 21 can be a protruding structure with a square cross section, or a protruding structure with a triangular or other polygonal cross section. The protruding structure can further improve the adhesion and bonding degree between the pixel definition layer 30 and the second protruding part 21, while preventing the pixel definition layer 30 from being displaced or slipped.

[0072] Furthermore, in some embodiments, the first protrusion 31 covers the second protrusion 21. This coverage allows the second protrusion 21 to have a higher height and increases the contact area between the first and second protrusions, further improving the adhesion between the pixel definition layer 30 and the second protrusion 21. Preferably, the first and second protrusions 31 have the same shape; for example, both are cylinders. In other embodiments of this application, the first and second protrusions 31 may have different shapes.

[0073] Please refer to Figure 6 , Figure 6 This is a schematic diagram of the fifth structure of the OLED display panel 100 provided in this application. This embodiment is similar to... Figure 4 The difference in the provided OLED display panel 100 is that the number of the first protrusions 31 is at least two, and the pixel definition layer 30 is a recessed portion 35 located between adjacent first protrusions 31, the recessed portion 35 covering the second protrusion 91.

[0074] By covering the second protrusion 91 with the recessed portion 35, the adhesion between the pixel definition layer 30 and the second protrusion 91 can be improved, and the space occupied by the second protrusion 91 can be reduced, thus avoiding the second protrusion 91 from affecting the encapsulation space of the border area 12.

[0075] Please refer to Figure 7 , Figure 7 This is a schematic diagram of the sixth structure of the OLED display panel 100 provided in this application. This embodiment is similar to... Figure 5 The difference in the provided OLED display panel 100 is that the number of the first protrusions 31 is at least two, and the pixel definition layer 30 is a recessed portion 35 located between adjacent first protrusions 31, the recessed portion 35 covering the second protrusion 21.

[0076] By covering the second protrusion 21 with the recessed portion 35, the adhesion between the pixel definition layer 30 and the second protrusion 21 can be improved, and the space occupied by the second protrusion 21 can be reduced, thus avoiding the second protrusion 21 from affecting the encapsulation space of the border area 12.

[0077] Please refer to Figure 8 , Figure 8 This is a schematic diagram of the seventh structure of the OLED display panel 100 provided in this application. This embodiment is similar to... Figure 1The difference between the provided OLED display panel 100 is that the first encapsulation part 60 further comprises a moisture absorption glue 62, the moisture absorption glue 62 is filled in the frame area 12, and the second encapsulation part 40 is arranged around the filling glue 61 and the moisture absorption glue 62.

[0078] The application is provided with the moisture absorption glue 62, wherein the filling glue 61 is used for encapsulating the organic light emitting device and providing mechanical strength for the OLED display panel 100, the second encapsulation part 40 is used for bonding the substrate 10 and the cover plate 50 and preventing water vapor from invading, and the moisture absorption glue 62 is used for absorbing water vapor from the outside into the organic light emitting display panel.

[0079] Further, in some embodiments, the moisture absorption glue 62 is arranged between the second encapsulation part 40 and the filling glue 61, the moisture absorption glue 62 is filled between the pixel definition layer 30 and the cover plate 50 and covers at least part of the first protruding part 31, and the filling glue 61 covers the remaining part of the first protruding part 31. Specifically, in the present embodiment, the moisture absorption glue 62 completely covers the first protruding part 31, and the filling glue 61 does not cover the first protruding part 31, that is, the moisture absorption glue 62 separates the second encapsulation part 40 from the filling glue 61, so that the moisture absorption glue 62 absorbs water vapor to avoid water vapor entering the filling glue 61.

[0080] Please refer to Figure 9 , Figure 9 The eighth structure of the OLED display panel 100 provided by the present application is shown in the schematic diagram, and the present embodiment is different from the first structure of the OLED display panel 100 provided by the present application in that Figure 8 The difference between the provided OLED display panel 100 is that the first encapsulation part 60 further comprises a moisture absorption glue 62, the moisture absorption glue 62 is filled in the frame area 12, and the second encapsulation part 40 is arranged around the filling glue 61 and the moisture absorption glue 62.

[0081] That is, in the present embodiment, the moisture absorption glue 62 does not separate the second encapsulation part 40 from the filling glue 61, but the filling glue 61 extends from the display area 11 to the frame area 12, so that the filling glue 61 can enhance the mechanical strength of the OLED display panel 100 in the frame area 12.

[0082] The above describes in detail the OLED display panel and the manufacturing method of the OLED display panel provided by the embodiments of the present application. The principles and implementation manners of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method of the present application and the core idea thereof. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An OLED display panel, characterized in that, include: A substrate, the substrate including a display area and a border area disposed around the display area; A planarization layer disposed on the substrate; The thickness of the flattening layer in the display area is greater than the thickness of the flattening layer in the border area; A pixel definition layer is disposed on the flat layer, and the pixel definition layer has a first protrusion in the border area; the thickness of the pixel definition layer in the display area is greater than the thickness of the pixel definition layer in the border area. A cover plate, wherein the cover plate is located on the side of the substrate on which the pixel definition layer is provided, and is disposed opposite to the substrate; A first encapsulation portion, which fills the space between the pixel definition layer and the cover plate and extends from the display area to the border area, and at least covers a portion of the first protrusion; A second encapsulation portion is filled between the pixel definition layer and the cover plate and is disposed around the first encapsulation portion.

2. The OLED display panel according to claim 1, characterized in that, The OLED display panel further includes a first electrode layer disposed on the planarization layer, and a pixel definition layer disposed on the first electrode layer. The first electrode layer includes an anode and a second protrusion. The pixel definition layer has an opening in the display area, the anode is disposed in the opening, the second protrusion is located in the border area, and the pixel definition layer partially covers the second protrusion in the border area.

3. The OLED display panel according to claim 1, characterized in that, The flat layer has a second protrusion in the border area, and the pixel definition layer partially covers the second protrusion in the border area.

4. The OLED display panel according to claim 2, characterized in that, The first protrusion covers the second protrusion.

5. The OLED display panel according to claim 2, characterized in that, The number of the first protrusions is at least two, and the portion of the pixel definition layer located between adjacent first protrusions is a recess, which covers the second protrusion.

6. The OLED display panel according to claim 1, characterized in that, The second encapsulation portion includes an edge adhesive, and the first encapsulation portion includes a filler adhesive.

7. The OLED display panel according to claim 6, characterized in that, The first encapsulation portion further includes a moisture-absorbing adhesive, which fills the border area, and the second encapsulation portion is located in the border area and is disposed around the filling adhesive and the moisture-absorbing adhesive.

8. The OLED display panel according to claim 7, characterized in that, The moisture-absorbing adhesive is disposed between the second encapsulation portion and the filler adhesive. The moisture-absorbing adhesive fills the space between the pixel definition layer and the cover plate and at least covers a portion of the first protrusion. The filler adhesive covers the remaining portion of the first protrusion.

9. The OLED display panel according to claim 7, characterized in that, The filler extends from the display area to the border area and abuts against the second encapsulation portion. The portion of the filler located in the border area is filled with moisture-absorbing adhesive between itself and the pixel definition layer. The moisture-absorbing adhesive covers the first protrusion.

10. The OLED display panel according to any one of claims 1 to 9, characterized in that, The pixel definition layer includes a first pixel definition layer and a second pixel definition layer. The first pixel definition layer covers the flat layer, and the second pixel definition layer is disposed on the first pixel definition layer and located in the display area. The first pixel definition layer has a first protrusion in the portion of the border area.

11. A method for manufacturing an OLED display panel, characterized in that, Includes the following steps: A substrate is provided, the substrate including a display area and a border area disposed around the display area; A planarization layer is formed on the substrate; the thickness of the planarization layer in the display area is greater than the thickness of the planarization layer in the border area. A pixel definition layer is formed on the flat layer, and the pixel definition layer has a first protrusion in the border area; the thickness of the pixel definition layer in the display area is greater than the thickness of the pixel definition layer in the border area. A cover plate is provided, an encapsulation material is formed on the cover plate, the cover plate and the substrate are aligned and pressed together such that the encapsulation material is located between the cover plate and the substrate, the encapsulation material is cured to form a second encapsulation portion and a first encapsulation portion, the first encapsulation portion fills between the pixel definition layer and the cover plate and extends from the display area to the border area, the second encapsulation portion fills between the pixel definition layer and the cover plate and is disposed around the first encapsulation portion, and the first encapsulation portion at least covers a portion of the first protrusion.

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