Display panel, manufacturing method and display device

Abstract

The invention is suitable for the technical field of display, and provides a display panel, a manufacturing method and a display device.The display panel comprises a driving substrate, an isolation structure and a light-emitting device.The isolation structure comprises an isolation body arranged on one side of the driving substrate and a blocking part arranged on the side, away from the driving substrate, of the isolation body, and the blocking part comprises a protruding part; the orthographic projection of the protruding part on the driving substrate at least partially surrounds the orthographic projection of the isolation main body on the driving substrate; the surface, facing the driving substrate, of the protruding part is provided with a limiting structure, the limiting structure comprises a protrusion and / or a groove, and the first packaging layer at least partially covers the limiting structure. The limiting structure blocks stripping between the protruding part and the first packaging layer, stripping between the edge of the protruding part and the first packaging layer is not easy to continue to spread through the limiting structure, a path from the edge of the protruding part to the isolation body is increased, and a path for water vapor and the like to enter the light-emitting device is prolonged. And the bonding area and the bonding force between the first packaging layer and the protruding part are also increased.

Description

Technical Field

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

[0002] Compared with liquid crystal display technology, OLED (Organic Light-Emitting Diode) display technology has many advantages, such as high contrast, wide color gamut, low power consumption, thinner structure, and flexible bending. At present, OLED display technology is widely used in mobile phones, computers, televisions and other fields.

[0003] The packaging reliability of OLED display technology still needs to be improved. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a display panel, aiming to provide a solution for improving the packaging reliability of the display panel.

[0005] The embodiment of the present application is implemented as follows: a display panel includes: a driving substrate, an isolation structure disposed on one side of the driving substrate, a light emitting device disposed between the isolation structures, and a first encapsulation layer disposed on a side of the isolation structure and the light emitting device away from the driving substrate;

[0006] The isolation structure comprises an isolation body disposed on one side of the drive substrate and a blocking portion disposed on a side of the isolation body away from the drive substrate, wherein the blocking portion comprises a protrusion, and an orthographic projection of the protrusion on the drive substrate at least partially surrounds an orthographic projection of the isolation body on the drive substrate;

[0007] A limiting structure is provided on a surface of the protruding portion facing the driving substrate, and the first encapsulation layer at least partially covers the limiting structure; the limiting structure includes at least one of a protrusion and a groove.

[0008] In one embodiment, the limiting structure includes a groove, and a portion of the first packaging layer is filled in the groove;

[0009] Preferably, the light emitting device comprises a first electrode, the first electrode is arranged on one side of the driving substrate, the display panel further comprises a pixel definition layer, the pixel definition layer comprises a pixel definition portion, the pixel definition portion exposes at least a portion of the first electrode; a first heightened portion is arranged on a side of the pixel definition layer away from the driving substrate, and in the orthographic projection direction of the driving substrate, the groove is aligned with the first heightened portion;

[0010] Preferably, the first heightened portion is made of the same material as the pixel defining portion;

[0011] Preferably, a portion of the first electrode is located between the pixel definition portion and the drive substrate, and a second elevated portion is provided on a side of the first electrode away from the drive substrate; in the orthographic projection direction of the drive substrate, the second elevated portion is aligned with the first elevated portion;

[0012] Preferably, the second raised portion is made of the same material as the first electrode;

[0013] Preferably, a first cushion block is provided on one side of the driving substrate, and the first cushion block is spaced apart from the first electrode; in the orthographic projection direction of the driving substrate, the first heightened portion is aligned with the first cushion block;

[0014] Preferably, the first spacer is made of the same material as that of the first electrode.

[0015] In one embodiment, the limiting structure includes a protrusion, and the first encapsulation layer at least partially covers a surface of the protrusion;

[0016] Preferably, the light emitting device comprises a first electrode, the first electrode is arranged on one side of the driving substrate, the display panel further comprises a pixel definition layer, the pixel definition layer comprises a pixel definition portion, the pixel definition portion exposes at least a portion of the first electrode; a first recessed area is arranged on a side of the pixel definition layer away from the driving substrate, and in the orthographic projection direction of the driving substrate, the protrusion is aligned with the first recessed area;

[0017] Preferably, a portion of the first electrode is located between the pixel definition portion and the drive substrate, and a second recessed area is provided on a side of the first electrode away from the drive substrate; in the orthographic projection direction of the drive substrate, the second recessed area is aligned with the first recessed area;

[0018] Preferably, the depth of the second recessed area is less than or equal to the thickness of the first electrode.

[0019] In one embodiment, the limiting structure includes a protrusion, and the first encapsulation layer at least partially covers a surface of the protrusion;

[0020] The light-emitting device includes a first electrode, which is arranged on one side of the driving substrate. The display panel also includes a pixel definition layer, which includes a pixel definition portion, and the pixel definition portion exposes at least a portion of the first electrode. A second pad is also provided on one side of the driving substrate, and the second pad is spaced apart from the first electrode. A second recessed area is formed between the second pad and the first electrode, and in the orthographic projection direction of the driving substrate, the second recessed area is aligned with the protrusion. The material of the second pad is different from that of the first electrode.

[0021] In one embodiment, in the orthographic projection direction of the driving substrate, the thickness T of the limiting structure is greater than 0 and less than or equal to 0.15 micrometers;

[0022] Preferably, the thickness T of the limiting structure is greater than or equal to 0.05 micrometers and less than or equal to 0.12 micrometers.

[0023] In one embodiment, the width W of the limiting structure is greater than or equal to 1 micron; the direction of the width is perpendicular to the orthographic projection direction of the driving substrate;

[0024] Preferably, the width W of the limiting structure is less than or equal to 5 micrometers.

[0025] In one embodiment, in the direction of the width, the distance from the center position of the limiting structure to the edge of the protrusion is D; the width of the protrusion is w, and the relationship between D and w satisfies the following equation: 0.2≤D / w≤0.6.

[0026] In one embodiment, in the width direction, the number of the limiting structure is one, or the limiting structure includes a plurality of limiting units, the limiting units are arranged at intervals, and each of the limiting units is independently the groove or protrusion; the width direction is perpendicular to the orthographic projection direction of the drive substrate.

[0027] In one embodiment, the protrusion includes a plurality of protruding frames sequentially connected in a direction surrounding the light-emitting device, and the limiting structure is provided on a surface of at least one protruding frame facing the driving substrate;

[0028] Preferably, in a direction surrounding the light emitting device, the limiting structures are arranged continuously or discontinuously.

[0029] In one embodiment, the limiting structure includes a groove, a portion of the first encapsulation layer is filled in the groove; an angle between an inner side wall of the groove and an inner bottom wall of the groove facing away from the driving substrate is in a range of 20° to 160°;

[0030] Preferably, an angle between an inner side wall of the groove and an inner bottom wall of the groove at a side away from the driving substrate is in a range of 90° to 160°.

[0031] In one embodiment, the limiting structure includes a protrusion, and the first encapsulation layer at least partially covers the surface of the protrusion; the angle between the side surface of the protrusion and the surface of the protrusion facing the drive substrate is in the range of 20° to 160°;

[0032] Preferably, the angle between the side surface of the protrusion and the surface of the protrusion facing the drive substrate is in the range of 90° to 160°.

[0033] Another object of the embodiment of the present application is to provide a method for manufacturing a display panel, which includes:

[0034] Make a drive substrate;

[0035] Making an isolation structure: Making an isolation structure on one side of the driving substrate, the isolation structure comprising an isolation body arranged on one side of the driving substrate, and a blocking portion arranged on a side of the isolation body away from the driving substrate, the blocking portion comprising a protrusion, the orthographic projection of the protrusion on the driving substrate at least partially surrounding the orthographic projection of the isolation body on the driving substrate; forming a limiting structure on a side surface of the protrusion facing the driving substrate, the limiting structure comprising at least one of a protrusion and a groove;

[0036] A light emitting device located between the isolation structures is manufactured, and a first packaging layer is manufactured which at least covers the light emitting device and at least partially covers the isolation structure and the limiting structure.

[0037] In one embodiment, it also includes:

[0038] Making pixel definition parts: before the step of making the isolation structure, making a plurality of first electrodes spaced apart on one side of the driving substrate, and making pixel definition parts on one side of the driving substrate and on a side of the first electrodes away from the driving substrate, wherein at least a portion of the first electrodes is exposed between the pixel definition parts;

[0039] After the step of making the isolation structure, a light-emitting functional material layer, a second electrode material layer and a packaging material layer are sequentially deposited between the isolation structures and on the side of the isolation structure facing away from the driving substrate, and the packaging material layer, the second electrode material layer and the light-emitting functional material layer are sequentially etched using a mask process to obtain a light-emitting functional layer and a second electrode located between the isolation structures, and a first packaging layer that at least covers the second electrode and at least partially covers the isolation structure and the limiting structure.

[0040] In one embodiment, a first raised portion and / or a first recessed area is formed on a surface of the pixel definition portion that is away from the drive substrate;

[0041] Preferably, the first elevated portion and the pixel defining portion are made of the same material.

[0042] In one embodiment, a second raised portion and / or a second recessed area is formed on a surface of the first electrode that is away from the driving substrate;

[0043] Preferably, the material of the second elevated portion is the same as that of the first electrode.

[0044] In one embodiment, it includes:

[0045] Before the step of making the pixel definition part, a first pad is made on one side of the driving substrate; the first pad is spaced apart from the first electrode; in the step of making the isolation structure, a groove aligned with the first pad is formed on the surface of the protrusion facing the driving substrate; the material of the first pad is different from that of the first electrode.

[0046] In one embodiment, it includes:

[0047] Before the step of making the pixel definition portion, a second pad is made on one side of the driving substrate; the second pad is spaced apart from the first electrode, and a second recessed area is formed between the second pad and the first electrode; in the step of making the isolation structure, a protrusion aligned with the second recessed area is formed on the surface of the protrusion facing the driving substrate; the material of the second pad is different from that of the first electrode.

[0048] Another object of the embodiments of the present application is to provide a display device, which includes the display panel as described in the above embodiments, or includes a display panel manufactured by the manufacturing method of the display panel as described in the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 This is a schematic diagram of the failure of the existing display panel packaging Figure 1 ;

[0051] Figure 2 This is a schematic diagram of the failure of the existing display panel packaging Figure 2 ;

[0052] Figure 3 is a schematic diagram of the planar structure of a display panel provided in the first embodiment of the present application;

[0053] Figure 4 is a schematic cross-sectional structure diagram of a display panel provided in the first embodiment of the present application, corresponding to Figure 3 Middle AA line;

[0054] Figure 5 yes Figure 4 Enlarged view of point E in the middle;

[0055] Figure 6 is a schematic diagram of peeling off the first encapsulation layer in the display panel provided in the first embodiment of the present application;

[0056] Figure 7 The distribution of the limiting structure in the protruding frame of the display panel provided in the first embodiment of the present application is Figure 1 ;

[0057] Figure 8 The distribution of the limiting structure in the protruding frame of the display panel provided in the first embodiment of the present application is Figure 2 ;

[0058] Fig. 9 The distribution of the limiting structure in the protruding frame of the display panel provided in the first embodiment of the present application is Figure 3 ;

[0059] Fig.10 The distribution of the limiting structure in the protruding frame of the display panel provided in the first embodiment of the present application is Figure 4 ;

[0060] Fig.11 The distribution of the limiting structure in the protruding frame of the display panel provided in the first embodiment of the present application is Figure 5 ;

[0061] Fig.12 The distribution of the limiting structure in the protruding frame of the display panel provided in the first embodiment of the present application is Figure 6 ;

[0062] Fig.13 is a schematic cross-sectional structure diagram of a display panel provided in the second embodiment of the present application, corresponding to Figure 3 Middle AA line;

[0063] Fig.14 yes Fig.13 The enlarged view of F in the middle;

[0064] Fig.15 is a schematic cross-sectional structure diagram of a display panel provided in the third embodiment of the present application, corresponding to Figure 3 Middle AA line;

[0065] Fig.16 yes Fig.15 Enlarged view of G in the middle;

[0066] Fig.17 is a schematic cross-sectional structure diagram of a display panel provided in the fourth embodiment of the present application, corresponding to Figure 3 Middle AA line;

[0067] Fig.18 yes Fig.17 Enlarged view of K in the middle;

[0068] Fig.19 is a schematic diagram of peeling off the first encapsulation layer in the display panel provided in the fourth embodiment of the present application;

[0069] Fig. 20 is a schematic cross-sectional structure diagram of a display panel provided in the fifth embodiment of the present application, corresponding to Figure 3 Middle AA line;

[0070] Fig.21 yes Fig. 20 The enlarged view of P in the middle;

[0071] Fig. 22 is a schematic cross-sectional structure diagram of a display panel provided in the sixth embodiment of the present application, corresponding to Figure 3 Middle AA line;

[0072] Fig.23 yes Fig. 22 Enlarged view of the middle Q;

[0073] Fig.24 It is a step flow chart of a method for manufacturing a display panel provided in the seventh embodiment of the present application.

[0074] The meanings of the marks in the figure are:

[0075] 0100, 100-display panel,

[0076] 1-driving substrate, 11-substrate, 12-driving circuit layer;

[0077] 002, 2-pixel definition layer, 21-pixel definition portion, 210-first elevated portion, 211-first recessed area;

[0078] 003, 3-isolation structure, 31-isolation body, 32-blocking part, 321-blocking body, 322-protrusion, 3220-limiting structure, 3221-protruding frame, 3222-groove, 3223-protrusion, 3228-limiting unit;

[0079] 004, 4-optical device, 41-first electrode, 410-second heightened portion, 42-light-emitting functional layer, 43-second electrode, 44-first pad, 45-second pad, 46-second recessed area;

[0080] 005, 5-First encapsulation layer. DETAILED DESCRIPTION

[0081] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0082] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly or indirectly fixed or disposed on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of this patent. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0083] In order to illustrate the technical solution described in this application, a detailed description is given below in conjunction with specific drawings and embodiments.

[0084] See also Figure 1 and Figure 2 As shown, in the display panel 0100, an isolation structure 003 is provided on the driving substrate 001, a pixel opening is defined between the isolation structures 003, and the light-emitting device 004 is arranged in the pixel opening. In addition, a first encapsulation layer 005 is provided on the isolation structure 003 and the light-emitting device 004. Specifically, in the manufacturing process, the isolation structure 003 is formed before the light-emitting device 004 and the first encapsulation layer 005, and the manufacturing processes of the isolation structure 003, the light-emitting device 004 and the first encapsulation layer 005 respectively involve one or more patterning processes, including a wet etching process and a dry etching process.

[0085] Multiple patterning processes may easily cause abnormal morphology of the isolation structure 003, such as Figure 1 As shown, the edge of the upper end of the isolation structure 003 is warped, and the bonding force between the upper end of the isolation structure 003 and the first encapsulation layer 005 is insufficient, resulting in peeling of the interface between the first encapsulation layer 005 and the isolation structure 003. Figure 1 As shown, a gap is formed between the upper end surface of the isolation structure 003 and the first encapsulation layer 005; Figure 2 As shown, in the subsequent etching process of the light-emitting device 004 and the first packaging layer 005, especially the wet etching process, the first packaging layer 005 and the isolation structure 003 are further peeled off, and a gap is formed between the first packaging layer 005 and the lower end of the isolation structure 003, thereby affecting the packaging reliability and causing dark spots on the display.

[0086] See also Figure 3 and Figure 4 As shown, the embodiment of the present application first provides a display panel 100, which includes a driving substrate 1, an isolation structure 3 disposed on a surface of one side of the driving substrate 1, a light-emitting device 4 disposed between the isolation structures 3, and a first encapsulation layer 5 disposed on the side of the isolation structure 3 and the light-emitting device 4 away from the driving substrate 1. Among them, an isolation structure 3 is disposed around each light-emitting device 4. In other words, the isolation structure 3 is in a closed ring shape and is disposed around the light-emitting device 4.

[0087] For ease of description, in the drawings of the embodiments of the present application, four directions of "up", "down", "inside" and "outside" are defined. Among them, the up and down directions are the orthographic projection directions of the driving substrate 1, wherein the direction from the driving substrate 1 to the isolation structure 3 is up, and the inside and outside directions are the orthographic projection directions perpendicular to the driving substrate 1. "Inside" and "outside" are determined based on the surrounding of the light-emitting device 4 by the isolation structure 3, and the light-emitting device 4 is located on the inner side of the isolation structure 3. It can be understood that at different positions of the isolation structure 3, the specific direction of the "inside" direction is different.

[0088] See also Figure 4 and Figure 6 As shown, the isolation structure 3 includes an isolation body 31 disposed on one side surface of the driving substrate 1, and a blocking portion 32 disposed on the upper surface of the isolation body 31, and the orthographic projection of the isolation body 31 on the driving substrate 1 is completely located within the orthographic projection of the blocking portion 32 on the driving substrate 1. That is, the two edges of the blocking portion 32 along the inner and outer directions are more protruding relative to the isolation body 31.

[0089] Here, the composition, preparation and other contents of the isolation structure 3 are described in patents CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, PCT / CN2024 / 099072, and CN11797 The present invention is further described in CN11755A, CN117998900A, CN117062489A, CN117580403A, CN116583155A, CN116669477A, ​​CN117396039A, CN116669480A, CN116600606A, and CN117500332A, the contents of which are incorporated herein by reference for reference.

[0090] like Figures 4 to 6 As shown, the light emitting device 4 includes a first electrode 41, a light emitting functional layer 42, and a second electrode 43 which are sequentially stacked on one side of the upper surface of the driving substrate 1. In addition, at least the light emitting functional layer 42, the second electrode 43, and the first encapsulation layer 5 are obtained by sequentially depositing and patterning corresponding material layers on one side of the upper surface of the isolation structure 3 and in the pixel opening between the isolation structures 3. By setting the isolation structure 3 in this way, the adjacent light emitting functional layers 42 and the adjacent second electrodes 43 can be isolated during the deposition process of the light emitting functional layer 42 and the second electrode 43.

[0091] Since the two edges of the blocking portion 32 along the inner and outer directions are more protruding than the isolation body 31, the portion of the blocking portion 32 protruding relative to the isolation body 31 is defined as the protruding portion 322, and the portion of the blocking portion 32 located between the protruding portions 322 and aligned with the isolation body 31 in the upper and lower directions is the blocking body 321. Figure 4 and Figure 5 The orthographic projection of the protrusion 322 on the driving substrate 1 at least partially surrounds the orthographic projection of the isolation body 31 on the driving substrate 1 .

[0092] like Figure 4 and Figure 5 As shown, the first encapsulation layer 5 is used to encapsulate the light-emitting device 4 between the isolation structure 3. Therefore, the first encapsulation layer 5 is connected to the side of the isolation body 31, the lower surface of the protrusion 322, and the peripheral side of the protrusion 322 to enclose the light-emitting device 4 between the first encapsulation layer 5 and the isolation structure 3.

[0093] Please refer to Figure 5 As shown, in the embodiment of the present application, a limiting structure 3220 is provided on the lower surface of the protrusion 322, and the first encapsulation layer 5 at least partially covers the limiting structure 3220. The limiting structure 3220 includes a groove 3222 (please refer to Figure 5 , Fig.13 and Fig.15 ) and / or protrusion 3223 (please refer to Fig.17 , Fig. 20 and Fig. 22 As shown), that is, there is a step difference between the limiting structure 3220 and other surfaces on its inner and outer sides.

[0094] like Figure 6 and Fig.19 As shown, the periphery of the protrusion 322 is more likely to bend and peel off from the first encapsulation layer 5. In the embodiment of the present application, a limiting structure 3220 is provided on the lower surface of the protrusion 322, which achieves the following technical effects: first, it can prevent the protrusion 322 from continuing to peel off from the first encapsulation layer 5, such as Figure 6 and Fig.19 As shown, even if the periphery of the protrusion 322 is peeled off from the first packaging layer 5, due to the obstruction of the limiting structure 3220, the peeling is not easy to continue to propagate through the limiting structure 3220, thereby improving the packaging reliability of the first packaging layer 5; secondly, the path from the edge of the protrusion 322 to the isolation body 31 is increased, and the path for water vapor or etching liquid to enter the light-emitting device 4 is extended, thereby improving the packaging reliability; thirdly, the path from the periphery of the protrusion 322 to the isolation body 31 is increased, which simultaneously increases the bonding area and bonding force between the first packaging layer 5 and the lower surface of the protrusion 322, thereby further improving the packaging reliability.

[0095] The display panel 100 provided in the embodiment of the present application has a lower surface of the protrusion 322 of the blocking portion 32 provided with a limiting structure 3220 which is a protrusion 3223 or a groove 3222, and the first encapsulation layer 5 is at least partially covered by the limiting structure 3220. When the first encapsulation layer 5 and the periphery of the blocking portion 32 are peeled off, the peeling can be prevented from continuing to propagate outward, and the path for water, oxygen, etching liquid, etc. to invade the light-emitting device 4 is extended, and the bonding area and bonding force between the first encapsulation layer 5 and the lower surface of the protrusion 322 are increased, thereby significantly improving the packaging reliability of the first encapsulation layer 5.

[0096] like Figure 4 , Fig.17 As shown, the upper surface of the protrusion 322 is provided with a concavo-convex structure corresponding to the limiting structure 3220. Another part of the first encapsulation layer 5 is located on one side of the upper surface of the blocking portion 32 and is arranged at a certain distance from the upper surface of the blocking portion 32. The upper surface and the lower surface of the first encapsulation layer 5 located on the side of the blocking portion 32 away from the drive substrate 1 are both formed with a concavo-convex structure corresponding to the limiting structure 3220.

[0097] For example, see Figure 4 , Figure 5 and Figure 6,as well as Fig.13 and Fig.15 As shown, the limiting structure 3220 provided on the lower surface of the protrusion 322 is a groove 3222, and the upper surface of the protrusion 322 is correspondingly in a protruding shape, the upper surface of the portion of the first encapsulation layer 5 located on the side of the blocking portion 32 away from the driving substrate 1 is correspondingly in a protruding shape, and the lower surface of the portion of the first encapsulation layer 5 located on the side of the blocking portion 32 away from the driving substrate 1 is correspondingly in a recessed shape.

[0098] For example, see Fig.17 , Fig.19 , Fig. 20 and Fig. 22 As shown, the limiting structure 3220 provided on the lower surface of the protrusion 322 is a protrusion 3223, and the upper surface of the protrusion 322 is correspondingly concave, the upper surface of the portion of the first encapsulation layer 5 located on the side of the blocking portion 32 away from the driving substrate 1 is correspondingly concave, and the lower surface of the portion of the first encapsulation layer 5 located on the side of the blocking portion 32 away from the driving substrate 1 is correspondingly protruding.

[0099] See also Figure 4 As shown, the driving substrate 1 includes a substrate 11 and a driving circuit layer 12 disposed on one side of the upper surface of the substrate 11. The pixel definition layer 2 is disposed on one side of the upper surface of the driving circuit layer 12 and includes a pixel definition portion 21. The isolation structure 3 is disposed on one side of the upper surface of the pixel definition portion 21. The pixel definition portion 21 and the isolation structure 3 jointly define a pixel opening. The first electrode 41 is disposed on one side of the upper surface of the driving circuit layer 12 and is electrically connected to the driving circuit layer 12. The pixel definition layer 2 is disposed on one side of the upper surface of the first electrode 41 and one side of the upper surface of the driving circuit layer 12, and at least a portion of the first electrode 41 is exposed.

[0100] The specific structure of the driving circuit layer 12 is not limited. For example, the driving circuit layer 12 includes multiple insulating layers and multiple metal layers, the insulating layers are arranged between adjacent metal layers, and the multiple metal layers are used to form a pixel driving circuit. The first electrode 41 and the second electrode 43 are both electrically connected to the pixel driving circuit, and the pixel driving circuit is used to provide corresponding driving voltages to the first electrode 41 and the second electrode 43 to generate a driving current to control the light-emitting functional layer 42 to emit light.

[0101] See also Figure 5 As shown, the thickness T of the limiting structure 3220 is preferably set to effectively block the stripping path and facilitate the manufacturing process. The thickness refers to the dimension in the up and down direction.

[0102] In one embodiment, the thickness T of the limiting structure 3220 is in the range of 0<T≤0.15 micrometers.

[0103] In one embodiment, the thickness T of the limiting structure 3220 is in the range of 0.01 micrometers ≤ T ≤ 0.15 micrometers.

[0104] Optionally, the thickness T of the limiting structure 3220 is in the range of 0.02 micrometers ≤ T ≤ 0.15 micrometers.

[0105] Optionally, the thickness T of the limiting structure 3220 is in the range of 0.03 micrometers ≤ T ≤ 0.15 micrometers.

[0106] Optionally, the thickness T of the limiting structure 3220 is in the range of 0.04 micrometers ≤ T ≤ 0.15 micrometers.

[0107] Optionally, the thickness T of the limiting structure 3220 is in the range of 0.05 micrometers ≤ T ≤ 0.15 micrometers.

[0108] Optionally, the thickness T of the limiting structure 3220 is in the range of 0.05 micrometers ≤ T ≤ 0.14 micrometers.

[0109] Optionally, the thickness T of the limiting structure 3220 is in the range of 0.05 micrometers ≤ T ≤ 0.13 micrometers.

[0110] Optionally, the thickness T of the limiting structure 3220 is in the range of 0.05 micrometers ≤ T ≤ 0.12 micrometers.

[0111] Optionally, the thickness T of the limiting structure 3220 is in the range of 0.05 micrometers ≤ T ≤ 0.11 micrometers.

[0112] Optionally, the thickness T of the limiting structure 3220 is in the range of 0.05 micrometers ≤ T ≤ 0.1 micrometers.

[0113] Optionally, the thickness T of the limiting structure 3220 is in the range of 0.06 micrometers ≤ T ≤ 0.1 micrometers.

[0114] In a specific embodiment, the thickness T of the limiting structure 3220 is 0.01 micron, 0.015 micron, 0.02 micron, 0.025 micron, 0.03 micron, 0.035 micron, 0.04 micron, 0.045 micron, 0.05 micron, 0.055 micron, 0.06 micron, 0.065 micron, 0.07 micron, 0.075 micron, 0.08 micron, 0.085 micron, 0.09 micron, 0.095 micron, 0.1 micron, 0.105 micron, 0.11 micron, 0.115 micron, 0.12 micron, 0.125 micron, 0.13 micron, 0.135 micron, 0.14 micron, 0.145 micron, 0.15 micron, etc.

[0115] Please continue reading Figure 5As shown, the width W of the limiting structure 3220 is preferably set to effectively block the stripping path and facilitate the manufacturing process. The width refers to the size in the inner and outer directions.

[0116] It should be noted that the width W of the limiting structure 3220 is smaller than the width w of the protrusion 322, and there is a sufficient distance between the inner edge of the limiting structure 3220 and the inner edge of the protrusion 322, and between the outer edge of the limiting structure 3220 and the outer edge of the protrusion 322. The inner edge of the protrusion 322 refers to a virtual boundary line between the protrusion 322 and the blocking body 321.

[0117] In one embodiment, the width W of the limiting structure 3220 is in the range of W≥1 micrometer. The purpose of such setting is to facilitate the manufacturing and forming of the limiting structure 3220.

[0118] In one embodiment, the width W of the limiting structure 3220 has a value range of W ≥ 2 micrometers.

[0119] In one embodiment, the width W of the limiting structure 3220 has a value range of W ≥ 3 micrometers.

[0120] In one embodiment, the width W of the limiting structure 3220 is in the range of W≤5 micrometers. This is to ensure that there is a sufficient distance between the inner and outer edges of the limiting structure 3220 and the inner and outer edges of the protrusion 322, so as to facilitate the production of the first electrode 41 and the light-emitting functional layer 42.

[0121] In one embodiment, the width W of the limiting structure 3220 is in the range of 1 micron ≤ W ≤ 5 microns.

[0122] In one embodiment, the width W of the limiting structure 3220 is in the range of 2 micrometers ≤ W ≤ 5 micrometers.

[0123] In one embodiment, the width W of the limiting structure 3220 is in the range of 2 micrometers ≤ W ≤ 4 micrometers.

[0124] In a specific embodiment, the width W of the limiting structure 3220 is 1 micron, 1.5 microns, 2 microns, 2.5 microns, 3 microns, 3.5 microns, 4 microns, 4.5 microns, 5 microns, etc.

[0125] Please continue reading Figure 5 As shown, the position of the limiting structure 3220 on the protrusion 322 is also suitable for effectively blocking the stripping path and facilitating the implementation of the manufacturing process.

[0126] In one embodiment, in the direction from outside to inside, the position of the limiting structure 3220 is between 4 / 10 and 8 / 10 of the width of the protrusion 322. In other words, the ratio of the distance D from the limiting structure 3220 to the periphery of the protrusion 322 to the width w of the protrusion 322 is 0.2 to 0.6. Since the limiting structure 3220 has a certain width, the setting of the limiting structure 3220 mentioned here refers to the center point of the width of the limiting structure 3220, that is, the limiting structure 3220 is calculated as a point.

[0127] Optionally, the ratio of the distance D from the limiting structure 3220 to the outer edge of the protrusion 322 to the width w of the protrusion 322 is 0.25-0.6.

[0128] Optionally, the ratio of the distance D from the limiting structure 3220 to the outer edge of the protrusion 322 to the width w of the protrusion 322 is 0.25-0.55.

[0129] Optionally, the ratio of the distance D from the limiting structure 3220 to the outer edge of the protrusion 322 to the width w of the protrusion 322 is 0.25-0.5.

[0130] Optionally, the ratio of the distance D from the limiting structure 3220 to the outer edge of the protrusion 322 to the width w of the protrusion 322 is 0.3-0.5.

[0131] In one embodiment, the ratio of the distance D from the limiting structure 3220 to the outer edge of the protrusion 322 to the width w of the protrusion 322 can be 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, etc.

[0132] See also Figures 7 to 12 As shown, from the angle from top to bottom (top view), the pixel opening and the light-emitting device 4 both include polygons. Correspondingly, the isolation structure 3 is in the shape of a polygonal frame. Taking the pixel opening as a quadrilateral as an example, the protrusion 322 of the isolation structure 3 includes four protruding frames 3221, and the protruding frames 3221 are connected in sequence around the light-emitting device 4. It can be understood that the polygons and polygonal frames here refer to the general shape, and do not limit the positive projection of each protruding frame 3221 on the driving substrate 1 to a straight structure, nor do they limit the protruding frames 3221 to have a clear angle with the protruding frames 3221.

[0133] See also Figures 7 to 10 As shown, the limiting structure 3220 can be formed on the lower surface of at least one protruding frame 3221 of the isolation structure 3.

[0134] like Figure 7 As shown, the limiting structure 3220 is arranged on the lower surface of each protruding frame 3221.

[0135] like Figure 8 As shown, the limiting structure 3220 is arranged on the lower surface of two adjacent protruding frames 3221 .

[0136] like Fig. 9 As shown, the limiting structure 3220 is arranged on the lower surfaces of two opposite protruding frames 3221 .

[0137] like Fig.10 As shown, the limiting structure 3220 is arranged on the lower surface of the three protruding frames 3221 therein.

[0138] See also Figures 7 to 9 As shown, in the direction surrounding the light emitting device 4, the limiting structures 3220 can be continuously arranged.

[0139] like Figures 10 to 12 As shown, in the direction surrounding the light emitting device 4, the limiting structure 3220 can be arranged discontinuously.

[0140] In the direction surrounding the light emitting device 4, the positions and form combinations of more limiting structures 3220 are no longer given examples.

[0141] In addition, in the inner and outer directions, the limiting structure 3220 may include a limiting unit 3228, or in other words, the limiting structure 3220 is a limiting unit 3228. Figure 4 , Figure 5 , Figure 6 In the description, the limiting structure 3220 including a limiting unit 3228 is taken as an example.

[0142] Or, in one embodiment, Fig. 9 and Fig.11 As shown, in the inner and outer directions, the limiting structure 3220 may include a plurality of limiting units 3228, each limiting unit 3228 is independently a groove 3222 or a protrusion 3223, and adjacent limiting units 3228 are arranged at intervals. At this time, the width of the limiting structure 3220 refers to the total width of the arrangement of the plurality of limiting units 3228.

[0143] Next, the specific structure of the limiting structure 3220 is provided.

[0144] First embodiment

[0145] See also Figure 4 and Figure 5As shown, in the first embodiment of the present application, the limiting structure 3220 includes a groove 3222. In other words, a portion of the lower surface of the protrusion 322 is recessed upward. Part of the material of the first encapsulation layer 5 is filled in the groove 3222. At this time, the thickness T of the limiting structure 3220 refers to the depth of the groove 3222.

[0146] See also Figure 5 As shown, the included angle between the inner side wall of the groove 3222 and the inner bottom wall on the side close to the driving substrate 1 is α, and the value range of α is 20° to 160°.

[0147] When 20°≤α<90°, in the direction from top to bottom, that is, in the direction vertically approaching the drive substrate 1, the width of the groove 3222 gradually decreases, and the side walls of the groove 3222 are inclined in a direction gradually approaching each other. This makes the projection of the end of the groove 3222 close to the drive substrate 1 on the drive substrate 1 completely inside the projection of the end of the groove 3222 away from the drive substrate 1 on the drive substrate 1.

[0148] When α=90°, the side wall of the groove 3222 is perpendicular to one side surface of the driving substrate 1. The cross section of the groove 3222 is rectangular.

[0149] When 90°<α≤160°, please refer to Figure 5 As shown, in the direction vertically away from the driving substrate 1, the width of the groove 3222 gradually decreases, and the side walls of the groove 3222 are inclined in a direction gradually approaching each other. The projection of the end of the groove 3222 away from the driving substrate 1 on the driving substrate 1 is completely located inside the projection of the end of the groove 3222 close to the driving substrate 1 on the driving substrate 1. At this time, the groove 3222 can be easily manufactured.

[0150] Optionally, the value range of α is 30° to 160°.

[0151] Further optionally, the value range of α is 60° to 160°.

[0152] Further optionally, the value range of α is 90° to 160°.

[0153] Further optionally, the value range of α is 90° to 150°.

[0154] Further optionally, the value range of α is 100° to 150°.

[0155] Further optionally, the value range of α is 110° to 150°.

[0156] In a specific embodiment, the value of α is 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, etc.

[0157] See also Figure 5 and Figure 6 As shown, in this embodiment, the upper surface of the pixel definition part 21 is provided with a first heightened portion 210. The first heightened portion 210 serves as a foundation structure for the light-emitting functional layer 42, the second electrode 43, the barrier 32 and the first encapsulation layer 5, so that the upper surface of the light-emitting functional layer 42, the upper surface of the second electrode 43 and the upper surface of the barrier 32 protrude upward accordingly, and the lower surface of the barrier 32 is concave to form a groove 3222, and then, part of the material of the first encapsulation layer 5 can be filled in the groove 3222. Since the first heightened portion 210 serves as a foundation structure for the groove 3222, the groove 3222 is aligned with the first heightened portion 210 in the up and down directions. The alignment here refers to the positional consistency between the first heightened portion 210 and the foundation structure based on the deposition process. In the following, the "alignment" between the other two structures is interpreted in the same way.

[0158] The inclination angle of the side surface of the first heightened portion 210 determines the inclination angle of the inner side wall of the groove 3222. It can be understood that the side surface of the first heightened portion 210 is not necessarily parallel to the inner side wall of the groove 3222, but the shape of the inner side wall of the groove 3222 is formed based on the shape of the side surface of the first heightened portion 210.

[0159] In one embodiment, the material of the first elevated portion 210 includes a non-metal material. The first elevated portion 210 made of a non-metal material can be formed by dry etching, and the inclination angle of the side surface thereof can be obtained by controlling the angle of the etching gas.

[0160] In an optional embodiment, the angle between the side surface of the first elevated portion 210 and the surface of the first elevated portion 210 close to the driving substrate 1 is α′, and the value range of α′ is 20° to 160°.

[0161] When 20°≤α<90°, the first heightened portion 210 is a trapezoidal shape that is narrow at the top and wide at the bottom. In this case, the first heightened portion 210 can be easily manufactured. When α=90°, the cross section of the first heightened portion 210 is a rectangle. When 90°<α≤160°, the first heightened portion 210 is an inverted trapezoidal shape that is narrow at the bottom and wide at the top.

[0162] Further optionally, the value range of α' is 20° to 120°.

[0163] Further optionally, the value range of α' is 20° to 90°.

[0164] Further optionally, the value range of α' is 30° to 90°.

[0165] Further optionally, the value range of α' is 40° to 90°.

[0166] Further optionally, the value range of α' is 40° to 85°.

[0167] Further optionally, the value range of α' is 40° to 80°.

[0168] In a specific embodiment, the value of α' is 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, etc.

[0169] In one embodiment, the material of the first elevated portion 210 includes an organic material.

[0170] In one embodiment, the material of the first heightened portion 210 includes a non-metal material and may be different from the material of the pixel definition portion 21 , and is additionally manufactured through a photomask after the pixel definition layer 2 is manufactured.

[0171] In one embodiment, the first heightened portion 210 is a portion of the pixel defining portion 21. Figure 4 , Figure 5 and Figure 6 As shown, the upper surface of the pixel definition portion 21 protrudes upward to form a first elevated portion 210. That is, the first elevated portion 210 is made of the same material as the pixel definition layer 2 and is formed by the same photomask process as the pixel definition portion 21. In this way, the pixel definition layer 2 serves as a foundation film layer for the light-emitting functional layer 42, the second electrode 43, the barrier portion 32, and the first encapsulation layer 5.

[0172] like Figure 4 and Figure 6 As shown, in this embodiment, a portion of the first electrode 41 is located below the pixel definition portion 21. The lower surface of the pixel definition portion 21 and the upper surface of the portion of the first electrode 41 located below the pixel definition portion 21 can be flattened. The flattening design here does not mean completely flat, but can be based on existing processes without designing the foundation structure of the groove 3222.

[0173] In one embodiment, the material of the first heightened portion 210 includes a metal material. The first heightened portion 210 of the metal material is manufactured by wet etching. The value range of α' is 20° to 90°, which is conducive to the manufacturing of the first heightened portion 210.

[0174] Further optionally, the value range of α' is 30° to 90°.

[0175] Further optionally, the value range of α' is 40° to 90°.

[0176] Further optionally, the value range of α' is 40° to 85°.

[0177] Further optionally, the value range of α' is 40° to 80°.

[0178] In a specific embodiment, the value of α' is 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, etc.

[0179] Second embodiment

[0180] See also Fig.13 and Fig.14 As shown, the difference between the second embodiment and the first embodiment is that the upper surface of the first electrode 41 is provided with a second heightened portion 410. The second heightened portion 410 serves as a foundation structure for the pixel definition layer 2, the light-emitting functional layer 42, the second electrode 43, the barrier portion 32 and the first encapsulation layer 5, so that the upper surface of the pixel definition portion 21 forms the first heightened portion 210, the upper surface of the light-emitting functional layer 42, the upper surface of the second electrode 43 and the upper surface of the barrier portion 32 protrude upwards accordingly, and the lower surface of the barrier portion 32 is concave to form a groove 3222, and then, part of the material of the first encapsulation layer 5 can be filled in the groove 3222.

[0181] The second raised portion 410 is aligned with the first raised portion 210 in the up-down direction.

[0182] The inclination angle of the side surface of the second raised portion 410 determines the inclination angle of the side surface of the first raised portion 210 .

[0183] In one embodiment, the angle between the side surface of the second raised portion 410 and the surface of the second raised portion 410 close to the driving substrate 1 is α”, and the value range of α” is 20° to 160°.

[0184] When 20°≤α”<90°, the second raised portion 410 is a trapezoidal style that is narrow at the top and wide at the bottom. At this time, the second raised portion 410 is easy to manufacture. When α”=90°, the cross-section of the second raised portion 410 is a rectangle. When 90°<α”≤160°, the second raised portion 410 is an inverted trapezoidal style that is narrow at the bottom and wide at the top.

[0185] Further optionally, the value range of α" is 20° to 120°.

[0186] Further optionally, the value range of α" is 20° to 90°.

[0187] Further optionally, the value range of α" is 30° to 90°.

[0188] Further optionally, the value range of α" is 40° to 90°.

[0189] Further optionally, the value range of α" is 40° to 85°.

[0190] Further optionally, the value range of α" is 40° to 80°.

[0191] In a specific embodiment, the value of α" is 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, etc.

[0192] In one embodiment, the material of the second heightened portion 410 includes a non-metal material and is formed by an additional photomask after the first electrode 41 is formed. The second heightened portion 410 of the non-metal material can be formed by dry etching, and the inclination angle of the side surface can be obtained by controlling the angle of the etching gas.

[0193] In one embodiment, the material of the second heightened portion 410 includes a metal material. The second heightened portion 410 of the metal material is manufactured by wet etching. The value range of α" is 20° to 90°.

[0194] Further optionally, the value range of α" is 30° to 90°.

[0195] Further optionally, the value range of α" is 40° to 90°.

[0196] Further optionally, the value range of α" is 40° to 85°.

[0197] Further optionally, the value range of α" is 40° to 80°.

[0198] In a specific embodiment, the value of α" is 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, etc.

[0199] In one embodiment, the second elevated portion 410 is a portion of the first electrode 41. Fig.13 As shown, optionally, part of the upper surface of the first electrode 41 protrudes upward to form the second elevated portion 410. The second elevated portion 410 and the first electrode 41 can be formed by the same photomask process, and the two are made of the same material.

[0200] In this way, the first electrode 41 serves as a foundation film layer for the pixel definition layer 2 , the light emitting functional layer 42 , the second electrode 43 , the barrier portion 32 and the first encapsulation layer 5 .

[0201] Specifically in this embodiment, when the first electrode 41 is manufactured, a grayscale mask or a halftone mask is used to perform a height differentiation design on the first electrode 41 to form the second heightened portion 410 .

[0202] Third embodiment

[0203] See also Fig.15 and Fig.16 As shown, the difference between the third embodiment and the second embodiment is that the first pad 44 is located on the upper surface of the driving substrate 1 and is spaced from the first electrode 41. The first pad 44 is designed to be protruding relative to the upper surface of the driving substrate 1 on both sides thereof. The first pad 44 serves as a foundation structure for the pixel definition layer 2, the light-emitting functional layer 42, the second electrode 43, the blocking portion 32 and the first encapsulation layer 5, so that the upper surface of the pixel definition portion 21 forms a first heightened portion 210, the upper surface of the light-emitting functional layer 42, the upper surface of the second electrode 43, and the upper surface of the blocking portion 32 protrude upward accordingly, and the lower surface of the blocking portion 32 is concave to form a groove 3222, and then, part of the material of the first encapsulation layer 5 can be filled in the groove 3222.

[0204] The inclination angle of the side surface of the first cushion block 44 determines the inclination angle of the side surface of the first elevated portion 210 .

[0205] In one embodiment, the angle between the side surface of the first cushion block 44 and the surface of the first cushion block 44 close to the driving substrate 1 is α””, and the value range of α”′ is 20° to 160°.

[0206] When 20°≤α"'<90°, the first cushion block 44 is a trapezoidal style that is narrow at the top and wide at the bottom, which is easy to manufacture. When α"'=90°, the cross-section of the first cushion block 44 is a rectangle. When 90°<α"'≤160°, the first cushion block 44 is an inverted trapezoidal style that is narrow at the bottom and wide at the top.

[0207] Further optionally, the value range of α″′ is 20° to 120°.

[0208] Further optionally, the value range of α″′ is 20° to 90°.

[0209] Further optionally, the value range of α″′ is 30° to 90°.

[0210] Further optionally, the value range of α″′ is 40° to 90°.

[0211] Further optionally, the value range of α″′ is 40° to 85°.

[0212] Further optionally, the value range of α″′ is 40° to 80°.

[0213] In a specific embodiment, the value of α″′ is 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, etc.

[0214] In one embodiment, the material of the first pad 44 includes a non-metal material and is additionally formed by a photomask after the first electrode 41 is formed. The non-metal first pad 44 can be formed by dry etching, and the inclination angle of the side surface can be obtained by controlling the angle of the etching gas.

[0215] In one embodiment, the material of the first pad 44 includes a metal material. The first pad 44 of the metal material is manufactured by wet etching. The first pad 44 can be formed before the first electrode 41 or after the first electrode 41. The value range of α"' is 20° to 90°.

[0216] Further optionally, the value range of α″′ is 30° to 90°.

[0217] Further optionally, the value range of α″′ is 40° to 90°.

[0218] Further optionally, the value range of α″′ is 40° to 85°.

[0219] Further optionally, the value range of α″′ is 40° to 80°.

[0220] In a specific embodiment, the value of α″′ is 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, etc.

[0221] The material of the first pad 44 can be the same as that of the first electrode 41. When the first electrode 41 is formed, the first electrode material layer can be patterned by a photomask to obtain the first pad 44 and the first electrode 41 spaced apart from each other on one side of the driving substrate 1. The first pad 44 has the same thickness as that of the first electrode 41.

[0222] The material of the first spacer 44 may be different from that of the first electrode 41. The first spacer 44 may be formed on one side of the driving substrate 1 by an additional photomask.

[0223] Fourth embodiment

[0224] See also Fig.17 , Fig.18 and Fig.19 As shown, in the fourth embodiment, the limiting structure 3220 includes a protrusion 3223. The first encapsulation layer 5 at least partially covers the lower surface of the protrusion 3223. The thickness of the limiting structure 3220 is the height of the protrusion 3223 in the vertical direction.

[0225] like Fig.19 As shown, the protrusion 3223 can also prevent the peeling from continuing to spread outward, extend the path for water, oxygen, etching solution, etc. to invade the light-emitting device 4, and increase the bonding area and bonding force between the first encapsulation layer 5 and the lower surface of the protrusion 322.

[0226] like Fig.18 As shown, in one embodiment, the angle between the side wall of the protrusion 3223 and the surface of the protrusion 3223 close to the driving substrate 1 is β, and the value range of β is 20° to 160°.

[0227] When 20°≤β<90°, in the direction from top to bottom, that is, in the direction perpendicular to the drive substrate 1, the width of the protrusion 3223 gradually increases, and the side walls of the protrusion 3223 are inclined in directions gradually moving away from each other. This makes the projection of the end of the protrusion 3223 that is away from the drive substrate 1 on the drive substrate 1 completely inside the projection of the end of the protrusion 3223 that is close to the drive substrate 1 on the drive substrate 1.

[0228] When β=90°, the side wall of the protrusion 3223 is perpendicular to one side surface of the driving substrate 1. The cross section of the protrusion 3223 is rectangular.

[0229] When 90°<β≤160°, please refer to Fig.18As shown, in the direction perpendicular to the driving substrate 1, the width of the protrusion 3223 gradually decreases, and the side walls of the protrusion 3223 are inclined in the direction of gradually approaching each other. The projection of the end of the protrusion 3223 close to the driving substrate 1 on the driving substrate 1 is completely located inside the projection of the end of the protrusion 3223 away from the driving substrate 1 on the driving substrate 1. At this time, the production of the protrusion 3223 is convenient.

[0230] Optionally, the value range of β is 30° to 160°.

[0231] Further optionally, the value range of β is 60° to 160°.

[0232] Further optionally, the value range of β is 90° to 160°.

[0233] Further optionally, the value range of β is 100° to 160°.

[0234] Further optionally, the value range of β is 110° to 160°.

[0235] Further optionally, the value range of β is 110° to 150°.

[0236] In a specific embodiment, the value of β is 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, etc.

[0237] like Fig.17 and Fig.18 As shown, in this embodiment, a first recessed area 211 is provided on the upper surface of the pixel definition portion 21. The pixel definition layer 2 serves as a foundation film layer for the light-emitting functional layer 42, the second electrode 43, the barrier portion 32 and the first encapsulation layer 5, so that the upper surface of the light-emitting functional layer 42 and the upper surface of the second electrode 43 are concave, and the lower surface of the barrier portion 32 is protruding, thereby forming the above-mentioned protrusion 3223. In the up and down direction, the first recessed area 211 is aligned with the protrusion 3223.

[0238] The inclination angle of the inner sidewall of the first recessed area 211 determines the inclination angle of the side of the protrusion 3223. It can be understood that the inner sidewall of the first recessed area 211 is not necessarily parallel to the side of the protrusion 3223, but the shape of the side of the protrusion 3223 is formed based on the shape of the inner sidewall of the first recessed area 211.

[0239] In one embodiment, an angle between an inner side wall of the first recessed area 211 and an inner bottom wall of the first recessed area 211 close to the driving substrate 1 is β', and a value range of β' is 20° to 160°.

[0240] When 20°≤β'<90°, the first recessed area 211 is a trapezoidal space with a small mouth and a large bottom.

[0241] When β′=90°, the cross section of the first recessed area 211 is a rectangle.

[0242] When 90°<β'≤160°, the first recessed area 211 is an inverted trapezoidal space with a large mouth and a small bottom.

[0243] Optionally, the value range of β' is 30° to 160°.

[0244] Further optionally, the value range of β' is 60° to 160°.

[0245] Further optionally, the value range of β' is 90° to 160°.

[0246] Further optionally, the value range of β' is 100° to 160°.

[0247] Further optionally, the value range of β' is 110° to 160°.

[0248] Further optionally, the value range of β' is 110° to 150°.

[0249] In a specific embodiment, the value of β' is 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, etc.

[0250] like Figure 4 and Figure 6 As shown, in this embodiment, a portion of the first electrode 41 is located below the pixel definition portion 21. Similarly, the lower surface of the pixel definition portion 21 and the upper surface of the portion of the first electrode 41 located below the pixel definition portion 21 can be flattened. The flattening design here does not mean completely flat, but can be based on existing processes without designing a foundation structure for the protrusion 3223.

[0251] In this embodiment, when forming the pixel definition portion 21 , a grayscale mask or a halftone mask can be used to perform a height-differentiated design on the pixel definition layer 2 to form a first recessed area 211 on the upper surface of the pixel definition portion 21 .

[0252] Fifth embodiment

[0253] See also Fig. 20 and Fig.21 As shown, the difference between the fifth embodiment and the fourth embodiment is that the second recessed area 46 is formed on the upper surface of the first electrode 41. The first electrode 41 serves as a foundation film layer for the pixel definition layer 2, the light-emitting functional layer 42, the second electrode 43, the barrier 32 and the first encapsulation layer 5, so that the upper surface of the pixel definition part 21 forms the first recessed area 211, the upper surface of the light-emitting functional layer 42 and the upper surface of the second electrode 43 are concave accordingly, and the lower surface of the barrier 32 is protruding accordingly, thereby forming a protrusion 3223. In the up and down direction, the second recessed area 46 is aligned with the first recessed area 211.

[0254] In this embodiment, the depth of the second recessed region 46 in the up-down direction may be smaller than the thickness of the first electrode 41 in the up-down direction.

[0255] Therefore, when the first electrode 41 is formed, a grayscale mask or a halftone mask may be used to perform a height-differentiated design on the first electrode material layer to form the first electrode 41 having the second recessed area 46 .

[0256] Alternatively, in this embodiment, the depth of the second recessed region 46 in the vertical direction may be equal to the thickness of the first electrode 41 in the vertical direction. Fig. 20 shown.

[0257] Therefore, when the first electrode 41 is formed, the first electrode material layer can be patterned by a photomask to form the second spacer 45 and the first electrode 41 which are spaced apart from each other. Fig. 20 Therefore, the second pad 45 and the first electrode 41 are in the same layer and are formed by the same photomask process, and the second pad 45 and the first electrode 41 have the same thickness and the same material.

[0258] The inclination angle of the inner sidewall of the second recessed area 46 determines the inclination angle of the inner sidewall of the first recessed area 211. It can be understood that the inner sidewall of the second recessed area 46 is not necessarily parallel to the side of the first recessed area 211, but the shape of the inner sidewall of the first recessed area 211 is formed based on the shape of the inner sidewall of the second recessed area 46.

[0259] In one embodiment, the included angle between the inner side wall of the second recessed area 46 and the inner bottom wall of the second recessed area 46 close to the driving substrate 1 is β”, and the value range of β’ is 20° to 160°.

[0260] When 20°≤β″<90°, the second recessed area 46 is a trapezoidal space with a small mouth and a large bottom.

[0261] When β″=90°, the cross section of the second recessed area 46 is a rectangle.

[0262] When 90°<β″≤160°, the second recessed area 46 is an inverted trapezoidal space with a large mouth and a small bottom.

[0263] Optionally, β" has a value range of 30° to 160°.

[0264] Further optionally, the value range of β" is 60° to 160°.

[0265] Further optionally, the value range of β" is 90° to 160°.

[0266] Further optionally, the value range of β" is 100° to 160°.

[0267] Further optionally, the value range of β" is 110° to 160°.

[0268] Further optionally, the value range of β" is 110° to 150°.

[0269] In a specific embodiment, the value of β" is 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, etc.

[0270] Sixth embodiment

[0271] See also Fig. 22 and Fig.23 As shown, the difference between the sixth embodiment and the fifth embodiment is that the second pad 45 is arranged on one side of the upper surface of the driving substrate 1 and is spaced apart from the first electrode 41. A second recessed area 46 is formed between the second pad 45 and the first electrode 41, and the second pad 45 and the first electrode 41 are made of different materials. Therefore, the second pad 45 can be formed on one side of the driving substrate 1 by an additional photomask, and the second pad 45 can be formed before the first electrode 41 or after the first electrode 41.

[0272] In this embodiment, the material of the second spacer 45 may include a non-metal material, such as an organic material or an inorganic material.

[0273] In this embodiment, the side surfaces of the first electrode 41 and the second pad 45 that are close to each other are the inner side walls of the second recessed area 46. Therefore, in this embodiment, the inclination angles of the two side surfaces of the second recessed area 46 may be the same or different. For example, the angle between the side surface of the first electrode 41 close to the second pad 45 and the inner bottom wall of the second recessed area 46 close to the drive substrate 1 is γ, and the angle between the side surface of the second pad 45 close to the first electrode 41 and the inner bottom wall of the second recessed area 46 close to the drive substrate 1 is γ'. In one embodiment, the value range of γ is 90° to 160°, and the value range of γ' is 20° to 160°.

[0274] Optionally, the value range of γ is 90° to 150°.

[0275] Further optionally, the value range of γ is 100° to 150°.

[0276] Further optionally, the value range of γ is 110° to 150°.

[0277] In a specific embodiment, the value of γ is 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, etc.

[0278] Optionally, the value range of γ' is 20° to 160°.

[0279] Optionally, β" has a value range of 30° to 160°.

[0280] Further optionally, the value range of γ' is 60° to 160°.

[0281] Further optionally, the value range of γ' is 90° to 160°.

[0282] Further optionally, the value range of γ' is 100° to 160°.

[0283] Further optionally, the value range of γ' is 110° to 160°.

[0284] Further optionally, the value range of γ' is 110° to 150°.

[0285] In a specific embodiment, the value of γ' is 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, etc.

[0286] It should be noted that the first to sixth embodiments above respectively provide implementation methods of a protrusion 3223 and a groove 3222 of the protrusion 322. When the limiting structure 3220 includes a plurality of limiting units 3228, each limiting unit 3228 can refer to the first to sixth embodiments above. The first to sixth embodiments are allowed to be used in combination.

[0287] For example, the limiting structure 3220 includes a plurality of protrusions 3223, and each protrusion 3223 can be independently referred to in the first to third embodiments described above. For another example, the limiting structure 3220 includes a plurality of grooves 3222, and each groove 3222 can be independently referred to in the fourth to sixth embodiments described above. For another example, the limiting structure 3220 includes at least one protrusion 3223 and at least one groove 3222, then each protrusion 3223 can be independently referred to in the first to third embodiments described above, and each groove 3222 can be independently referred to in the fourth to sixth embodiments described above.

[0288] See also Fig.24 As shown, the seventh embodiment of the present application further provides a method for manufacturing a display panel, which is used to manufacture the display panel 100 as described in the above embodiments.

[0289] Specifically, the manufacturing method of the display panel includes:

[0290] Step S1, manufacturing a driving substrate 1;

[0291] Specifically, the driving substrate 1 includes a substrate 11 and a driving circuit layer 12 disposed on one side of the substrate 11 .

[0292] Step S2, manufacturing the isolation structure 3: the isolation structure 3 includes an isolation body 31 disposed on one side surface of the driving substrate 1, and a blocking portion 32 disposed on the side of the isolation body 31 away from the driving substrate 1, the blocking portion 32 includes a protrusion 322, and the orthographic projection of the protrusion 322 on the driving substrate 1 at least partially surrounds the orthographic projection of the isolation body 31 on the driving substrate 1. A limiting structure 3220 is formed on the side surface of the protrusion 322 facing the driving substrate 1, and the limiting structure 3220 includes a protrusion 3223 and / or a groove 3222.

[0293] The orthographic projection of the isolation body 31 on the driving substrate 1 is completely within the orthographic projection of the blocking portion 32 on the driving substrate 1. The blocking portion 32 further includes a blocking body 321, and the orthographic projection of the blocking body 321 on the driving substrate 1 coincides with the orthographic projection of the isolation body 31 on the driving substrate 1.

[0294] Pixel openings are defined between the isolation structures 3 .

[0295] Step S3 , manufacturing the light emitting device 4 located between the isolation structures 3 , and manufacturing the first packaging layer 5 which at least covers the light emitting device 4 and at least partially covers the isolation structure 3 and the limiting structure 3220 .

[0296] It should be noted that the division of the above steps S1 to S3 does not limit the production method to a single sequence. Without affecting the inventive principle of the present application, the above steps S1 to S3 may be performed in an alternating order or in a swapped order.

[0297] In one embodiment, please refer to the aforementioned Figure 4 As shown, the manufactured light-emitting device 4 includes a first electrode 41, a light-emitting functional layer 42 and a second electrode 43, wherein the first electrode 41 is manufactured between step S1 and step S2: a plurality of first electrodes 41 are manufactured at intervals on the side of the driving circuit layer 12 away from the substrate 11, and a pixel definition portion 21 is manufactured on the side of the driving circuit layer 12 and the first electrode 41 away from the driving circuit layer 12, and at least a portion of the first electrode 41 is exposed between the pixel definition portions 21. The light-emitting functional layer 42 and the second electrode 43 are manufactured in step S3: a light-emitting functional material layer, a second electrode material layer and a packaging material layer are sequentially deposited between the isolation structures 3 and on the side of the isolation structures 3 away from the driving substrate 1, and the packaging material layer, the second electrode material layer and the light-emitting functional material layer are sequentially etched by a photomask process to obtain the light-emitting functional layer 42 and the second electrode 43 located between the isolation structures 3, and a first packaging layer 5 covering at least the second electrode 43 and at least partially covering the isolation structures 3 and the limiting structures 3220.

[0298] In one embodiment, between step S1 and step S2, a first raised portion 210 is formed on a surface of the pixel definition portion 21 which is away from the driving substrate 1 (please refer to Figure 4 as shown) and / or the first recessed area 211 (please refer to Fig.17 As shown), correspondingly, in step S3, the limiting structure 3220 of the protrusion 322 includes a protrusion 3223 and / or a groove 3222.

[0299] In one embodiment, between step S1 and step S2, a second raised portion 410 is formed on a surface of the first electrode 41 which is away from the driving substrate 1 (please refer to Fig.13 as shown) and / or the second recessed area 46 (please refer to Fig. 20 As shown), correspondingly, in step S3, the limiting structure 3220 of the protrusion 322 includes a protrusion 3223 and / or a groove 3222.

[0300] In one embodiment, between step S1 and step S2, a first pad 44 is formed on the upper surface of the driving substrate 1 (please refer to Fig.15As shown in FIG. 4 , the first pad 44 is spaced from the first electrode 41 , and the material of the first pad 44 is different from the material of the first electrode 41 . Correspondingly, in step S3 , the limiting structure 3220 on the protrusion 322 includes a groove 3222 aligned with the first pad 44 .

[0301] In one embodiment, between step S1 and step S2, a second pad 45 is formed on the upper surface of the driving substrate 1 (please refer to Fig. 22 As shown in FIG. 1 , the second pad 45 is spaced from the first electrode 41, a second recessed area 46 is formed between the second pad 45 and the first electrode 41, and the material of the second pad 45 is different from that of the first electrode 41. Correspondingly, in step S3, the limiting structure 3220 of the protrusion 322 includes a protrusion 3223 aligned with the second recessed area 46.

[0302] Finally, the eighth embodiment of the present application further provides a display device, which includes the display panel 100 described in the above embodiments. The display device has the same features and technical effects as the display panel 100 described in the above embodiments, which will not be described in detail here.

[0303] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: A driving substrate, an isolation structure disposed on one side of the driving substrate, a light emitting device disposed between the isolation structures, and a first encapsulation layer disposed on a side of the isolation structure and the light emitting device away from the driving substrate; The isolation structure comprises an isolation body disposed on one side of the drive substrate and a blocking portion disposed on a side of the isolation body away from the drive substrate, wherein the blocking portion comprises a protrusion, and an orthographic projection of the protrusion on the drive substrate at least partially surrounds an orthographic projection of the isolation body on the drive substrate; A limiting structure is provided on a surface of the protruding portion facing the driving substrate, and the first encapsulation layer at least partially covers the limiting structure; the limiting structure includes at least one of a protrusion and a groove.

2. The display panel according to claim 1, wherein: The limiting structure comprises a groove, and a portion of the first encapsulation layer is filled in the groove; Preferably, the light emitting device comprises a first electrode, the first electrode is arranged on one side of the driving substrate, the display panel further comprises a pixel definition layer, the pixel definition layer comprises a pixel definition portion, the pixel definition portion exposes at least a portion of the first electrode; a first heightened portion is arranged on a side of the pixel definition layer away from the driving substrate, and in the orthographic projection direction of the driving substrate, the groove is aligned with the first heightened portion; Preferably, a portion of the first electrode is located between the pixel definition portion and the drive substrate, and a second elevated portion is provided on a side of the first electrode away from the drive substrate; in the orthographic projection direction of the drive substrate, the second elevated portion is aligned with the first elevated portion; Preferably, the second raised portion is made of the same material as the first electrode; Preferably, a first cushion block is provided on one side of the driving substrate, and the first cushion block is spaced apart from the first electrode; in the orthographic projection direction of the driving substrate, the first heightened portion is aligned with the first cushion block; Preferably, the first spacer is made of the same material as the first electrode.

3. The display panel according to claim 1, wherein: The limiting structure includes a protrusion, and the first encapsulation layer at least partially covers the surface of the protrusion; Preferably, the light emitting device comprises a first electrode, the first electrode is arranged on one side of the driving substrate, the display panel further comprises a pixel definition layer, the pixel definition layer comprises a pixel definition portion, the pixel definition portion exposes at least a portion of the first electrode; a first recessed area is arranged on a side of the pixel definition layer away from the driving substrate, and in the orthographic projection direction of the driving substrate, the protrusion is aligned with the first recessed area; Preferably, a portion of the first electrode is located between the pixel definition portion and the drive substrate, and a second recessed area is provided on a side of the first electrode away from the drive substrate; in the orthographic projection direction of the drive substrate, the second recessed area is aligned with the first recessed area; Preferably, the depth of the second recessed area is less than or equal to the thickness of the first electrode.

4. The display panel according to claim 1, wherein: The limiting structure includes a protrusion, and the first encapsulation layer at least partially covers the surface of the protrusion; The light emitting device includes a first electrode, which is disposed on one side of the driving substrate. The display panel also includes a pixel definition layer, which includes a pixel definition portion, and the pixel definition portion exposes at least a portion of the first electrode. A second pad is also disposed on one side of the driving substrate, and the second pad is spaced apart from the first electrode. A second recessed area is formed between the second pad and the first electrode, and in the orthographic projection direction of the driving substrate, the second recessed area is aligned with the protrusion. The material of the second spacer is different from that of the first electrode.

5. The display panel according to claim 1, wherein: In the orthographic projection direction of the driving substrate, the thickness T of the limiting structure is greater than 0 and less than or equal to 0.15 micrometers; Preferably, the thickness T of the limiting structure is greater than or equal to 0.05 micrometers and less than or equal to 0.12 micrometers.

6. The display panel according to any one of claims 1 to 5, characterized in that: The width W of the limiting structure is greater than or equal to 1 micron; the direction of the width is perpendicular to the orthographic projection direction of the driving substrate; Preferably, the width W of the limiting structure is less than or equal to 5 micrometers.

7. The display panel according to claim 6, wherein: In the direction of the width, the distance from the center position of the limiting structure to the edge of the protrusion is D; the width of the protrusion is w, and the relationship between D and w satisfies the following equation: 0.2≤D / w≤0.

6.

8. The display panel according to any one of claims 1 to 5, characterized in that: In the width direction, the number of the limiting structure is one, or the limiting structure includes a plurality of limiting units, the limiting units are arranged at intervals, and each limiting unit is independently the groove or protrusion; the width direction is perpendicular to the orthographic projection direction of the drive substrate.

9. The display panel according to any one of claims 1 to 5, characterized in that: The protrusion includes a plurality of protruding frames connected in sequence in a direction surrounding the light emitting device, and the limiting structure is provided on a surface of at least one protruding frame facing the driving substrate; Preferably, in a direction surrounding the light emitting device, the limiting structures are arranged continuously or discontinuously.

10. The display panel according to claim 1, wherein: The limiting structure comprises a groove, a part of the first encapsulation layer is filled in the groove; the angle between the inner side wall of the groove and the inner bottom wall of the groove facing away from the driving substrate is in the range of 20° to 160°; Preferably, the angle between the inner side wall of the groove and the inner bottom wall of the groove at a side away from the driving substrate is in the range of 90° to 160°.

11. The display panel according to claim 1, wherein: The limiting structure includes a protrusion, and the first encapsulation layer at least partially covers the surface of the protrusion; the angle between the side surface of the protrusion and the surface of the protrusion facing the driving substrate is in the range of 20° to 160°; Preferably, the angle between the side surface of the protrusion and the surface of the protrusion facing the drive substrate is in the range of 90° to 160°.

12. A method for manufacturing a display panel, characterized in that: include: Make a drive substrate; Making an isolation structure: Making an isolation structure on one side of the driving substrate, the isolation structure comprising an isolation body arranged on one side of the driving substrate, and a blocking portion arranged on a side of the isolation body away from the driving substrate, the blocking portion comprising a protrusion, the orthographic projection of the protrusion on the driving substrate at least partially surrounding the orthographic projection of the isolation body on the driving substrate; forming a limiting structure on a side surface of the protrusion facing the driving substrate, the limiting structure comprising at least one of a protrusion and a groove; A light emitting device located between the isolation structures is manufactured, and a first packaging layer is manufactured which at least covers the light emitting device and at least partially covers the isolation structure and the limiting structure.

13. The method for manufacturing a display panel according to claim 12, wherein: Also includes: Making pixel definition parts: before the step of making the isolation structure, making a plurality of first electrodes spaced apart on one side of the driving substrate, and making pixel definition parts on one side of the driving substrate and on a side of the first electrodes away from the driving substrate, wherein at least a portion of the first electrodes is exposed between the pixel definition parts; After the step of making the isolation structure, a light-emitting functional material layer, a second electrode material layer and a packaging material layer are sequentially deposited between the isolation structures and on the side of the isolation structure facing away from the driving substrate, and the packaging material layer, the second electrode material layer and the light-emitting functional material layer are sequentially etched using a mask process to obtain a light-emitting functional layer and a second electrode located between the isolation structures, and a first packaging layer that at least covers the second electrode and at least partially covers the isolation structure and the limiting structure.

14. The method for manufacturing a display panel according to claim 13, wherein: forming a first elevated portion and / or a first recessed area on a surface of the pixel definition portion that is away from the drive substrate; Preferably, the first elevated portion and the pixel defining portion are made of the same material.

15. The method for manufacturing a display panel according to claim 13, wherein: forming a second raised portion and / or a second recessed area on a surface of the first electrode facing away from the driving substrate; Preferably, the material of the second elevated portion is the same as that of the first electrode.

16. The method for manufacturing a display panel according to claim 13, wherein: include: Before the step of manufacturing the pixel definition portion, manufacturing a first spacer on one side of the driving substrate; The first spacer is spaced apart from the first electrode; In the step of manufacturing the isolation structure, a groove aligned with the first pad is formed on a surface of the protruding portion facing the drive substrate; and the material of the first pad is different from that of the first electrode.

17. The method for manufacturing a display panel according to claim 13, wherein: include: Before the step of manufacturing the pixel definition portion, manufacturing a second spacer on one side of the driving substrate; The second pad is spaced from the first electrode, and a second recessed area is formed between the second pad and the first electrode; in the step of manufacturing the isolation structure, a protrusion is formed on a surface of the protruding portion facing the drive substrate and aligned with the second recessed area; The material of the second spacer is different from that of the first electrode.

18. A display device, characterized in that: A display panel comprising the display panel according to any one of claims 1 to 11 or a display panel manufactured by the manufacturing method of the display panel according to any one of claims 12 to 17.

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