Display panel, manufacturing method thereof and display device

Abstract

The invention discloses a display panel, a manufacturing method thereof and a display device. The display panel comprises a back plate, a pixel definition layer and a partition layer which are sequentially arranged in a stacked mode in the first direction. The pixel definition layer comprises a plurality of pixel definition blocks which are arranged at intervals; the partition layer comprises a plurality of partition blocks, and the partition blocks are arranged on the surfaces, back to the backboard, of the pixel definition blocks in a one-to-one correspondence mode; wherein the partition block is provided with a first surface and a second surface which are oppositely arranged in the first direction, the first surface is connected with the pixel definition block, the partition block is provided with a dovetail groove from the second surface, and the dovetail groove is provided with a bottom wall which is arranged at an interval with the pixel definition block; the first light-emitting layer comprises a first light-emitting part and a first residual part, the first light-emitting part is arranged on the back plate on one side of the pixel defining block and extends to the pixel defining block and the partition block, the first residual part is arranged on the bottom wall, and the first light-emitting part and the first residual part are arranged at an interval. The display panel can effectively prevent water vapor from invading and is good in packaging effect.

Description

Technical Field

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

[0002] With the development of optoelectronic display technology, OLED and LCD display technologies have been mass-produced. OLED display technology has become more and more popular in the market due to its advantages of high color gamut, high contrast, and wide viewing angle, especially flexible OLED products, which are used more and more frequently. Among them, in the production process of OLED products, it is generally necessary to use FMM (fine metal mask) to evaporate the luminescent material to form the pattern of the luminescent material. However, the accuracy of FMM is limited. When the number of pixels per inch of the OLED display is high, the distance between the two pixels is very close, which can easily cause the evaporation of the luminescent material to shift, resulting in contact between luminescent materials of different colors, causing problems such as color deviation. Therefore, the two pixels can be isolated by forming a pendant structure before the luminescent material is evaporated. However, after preparing the structure, since the pendant structure is an inverted trapezoidal structure, the normally prepared encapsulation inorganic layer will also be disconnected at the pendant structure, and the luminescent material cannot be protected, resulting in a decrease in the encapsulation effect of the display panel, and the life of the display panel is shortened due to water vapor intrusion. Summary of the invention

[0003] The purpose of the present application is to provide a display panel and a manufacturing method thereof and a display device, so as to solve the problems of water vapor intrusion and poor packaging effect of the display panel.

[0004] To achieve the purpose of this application, this application provides the following technical solutions: In a first aspect, the present application provides a display panel, comprising: A backplane, a pixel definition layer, and a partition layer are sequentially stacked in a first direction; The pixel definition layer includes a plurality of pixel definition blocks arranged at intervals; the partition layer includes a plurality of partition blocks, and the plurality of partition blocks are arranged one by one on the surface of the pixel definition block facing away from the back plate; The partition block has a first surface and a second surface disposed opposite to each other in the first direction, the first surface is connected to the pixel definition block, the partition block has a dovetail groove formed on the second surface, and the dovetail groove has a bottom wall spaced apart from the pixel definition block; The first light-emitting layer includes a first light-emitting portion and a first residual portion, wherein the first light-emitting portion is arranged on the back plate on one side of the pixel definition block and extends to the pixel definition block and the partition block, and the first residual portion is arranged on the bottom wall, and the first light-emitting portion and the first residual portion are spaced apart.

[0005] In one embodiment, the dovetail groove further includes a first side wall and a second side wall arranged opposite to each other, the first side wall is connected to the bottom wall and has a first angle α, the second side wall is connected to the bottom wall and has a second angle β, satisfying 30°≤α≤80°, 30°≤β≤80°.

[0006] In one embodiment, the display panel further includes a partition boss, the partition boss is disposed on the bottom wall, the distance between the bottom wall and the second surface in the first direction is h1, and the maximum size of the partition boss in the first direction is h2, satisfying: h1>h2.

[0007] In one embodiment, the cross-sectional shape of the partition boss in the first direction is a trapezoid or a triangle.

[0008] In one embodiment, the display panel further includes first inorganic layers stacked in sequence in the first direction, and the first inorganic layers are arranged on a side of the first light-emitting layer facing away from the backplane.

[0009] In one embodiment, a size of the first inorganic layer in the first direction is h3, and a size of the first light-emitting layer in the first direction is h4, satisfying: h4

[0010] In one embodiment, the display panel further includes a second light-emitting layer, the second light-emitting layer includes a second light-emitting portion and a second residual portion, the second light-emitting portion is arranged on a side of the partition block facing away from the first light-emitting portion, and the second residual portion is accommodated in the dovetail groove.

[0011] In a second aspect, the present application provides a display device, comprising a housing and a display panel according to any one of the various embodiments of the first aspect.

[0012] In a third aspect, the present application provides a method for manufacturing a display panel, comprising: forming a pixel definition layer on the backplane along a first direction; forming a partition layer on the pixel definition layer, wherein the partition layer has a dovetail groove; forming a first light-emitting layer on the back plate and the bottom wall of the dovetail groove; Wherein, the pixel definition layer includes a plurality of pixel definition blocks arranged at intervals; The partition layer comprises a plurality of partition blocks, the plurality of partition blocks are arranged one by one on the surface of the pixel definition block facing away from the back plate, the partition block has a first surface and a second surface arranged opposite to each other in the first direction, the first surface is connected to the pixel definition block, the partition block is provided with the dovetail groove from the second surface, and the dovetail groove has a bottom wall spaced apart from the pixel definition block;​ The first light-emitting layer includes a first light-emitting portion and a first residual portion which are arranged at intervals. The first light-emitting portion is arranged on the back plate, and the first residual portion is arranged on the bottom wall.

[0013] In one embodiment, a partition layer is formed on the pixel definition layer, and the partition layer has a dovetail groove, including: forming a first pre-processing layer on the pixel definition layer; forming a photoresist structure on the first pretreatment layer; forming a second pretreatment layer on the photoresist structure and the first pretreatment layer; The dovetail groove is formed by removing a portion of the second pretreatment layer and the photoresist structure.

[0014] The display panel of the present application is provided with a partition block with a dovetail groove on the pixel definition block, and the first residual portion of the first light-emitting layer is accommodated in the dovetail groove so as to be spaced apart from the first light-emitting portion. The partition block and the dovetail groove work together to enable the first light-emitting portion to emit light when current passes through it, while the first residual portion cannot emit light when current does not pass through it, thereby achieving pixel isolation and improving problems such as pixel color deviation. The first light-emitting portion extends to the pixel definition block and the partition block, and water vapor and the like cannot penetrate from the gap between the first light-emitting portion and the pixel definition block. Therefore, the display panel of the present application has a good packaging effect and water vapor and the like are not easy to invade. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 is a schematic diagram of a display panel of the prior art; Figure 2 is a schematic diagram of a display panel of an embodiment; Figure 3 yes Figure 2 A partial enlarged view of the middle A; Figure 4 is a schematic diagram of a partial structure of a display panel according to an embodiment; Figure 5 yes Figure 4 A partial enlarged view of point B in the middle; Figure 6 is a schematic diagram of a display panel of another embodiment; Figure 7 yes Figure 6A partial enlarged view of point C in the middle; Figure 8 is a flow chart of a method for manufacturing a display panel according to an embodiment; Fig. 9 is a flow chart of step S20 in a method for manufacturing a display panel according to an embodiment; Fig.10 is a structural diagram of step S20 in a method for manufacturing a display panel according to an embodiment; Fig.11 It is a structural diagram of step S21 in a method for manufacturing a display panel according to another embodiment.

[0017] Description of reference numerals: 100-display panel, 10-backplane, 20-pixel definition layer, 21-pixel definition block, 30-partition layer, 31-partition block, 32-first surface, 33-second surface, 34-dovetail groove, 341-bottom wall, 342-first side wall, 343-second side wall, 40-first light-emitting layer, 41-first light-emitting portion, 42-first residual portion, 50-partition boss, 61-first inorganic layer, 62-organic layer, 63-second inorganic layer, 70-second light-emitting layer, 71-second light-emitting portion, 72-second residual portion, 81-first pretreatment layer, 811-support portion, 812-raised portion, 82-light-blocking structure, 83-second pretreatment layer; 200-overhang structure, 300-light-emitting area, α-first angle, β-second angle, h1-distance between the bottom wall and the second surface in the first direction, h2-maximum dimension of the partition boss in the first direction, h3-dimension of the first inorganic layer in the first direction, h4-dimension of the first light-emitting layer in the first direction, d1-maximum dimension of the pixel definition block in the first direction, d2-depth of the dovetail groove in the first direction, X-first direction, Y-second direction. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0020] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this application and in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this application includes any and all combinations of one or more of the related listed items.

[0021] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0022] For reference Figure 1 Due to the presence of the overhang structure 200, the light-emitting area 300 is completely disconnected from the opening area and the overhang structure 200. Even if the light-emitting areas 300 of adjacent pixels are stacked or released above the overhang structure 200, no current will flow through. This part of the material does not emit light and will not affect the product. However, after the structure is prepared, because the overhang structure 200 is an inverted trapezoidal structure, that is, the inclined surface of the opening area and the lower bottom form an obtuse angle, and the normally prepared encapsulation inorganic layer will also be disconnected at the overhang structure 200, it is impossible to protect the light-emitting area 300. Figure 1 It can be seen from the path shown in that water vapor will invade the pixel definition layer and then enter the light-emitting area 300 from the side. When organic matter is used as the pixel definition layer, the water and oxygen isolation ability is poor, and the path is very short, so the light-emitting area 300 cannot be protected, resulting in a decrease in the packaging effect of the display panel, and the life of the display panel is shortened due to the invasion of water vapor.

[0023] For reference Figure 2 , Figure 3 , Figure 4 and Figure 5 The present application provides a display panel 100, comprising a backplane 10, a pixel definition layer 20 and a partition layer 30 stacked in sequence in a first direction X. The pixel definition layer 20 comprises a plurality of pixel definition blocks 21 arranged at intervals; the partition layer 30 comprises a plurality of partition blocks 31, and the plurality of partition blocks 31 are arranged one by one on the surface of the pixel definition block 21 facing away from the backplane 10. The partition block 31 has a first surface 32 and a second surface 33 arranged opposite to each other in the first direction X, the first surface 32 is connected to the pixel definition block 21, and the partition block 31 has a dovetail groove 34 formed on the second surface 33, and the dovetail groove 34 has a bottom wall 341 arranged at intervals from the pixel definition block 21. The display panel 100 also includes a first light-emitting layer 40, which includes a first light-emitting portion 41 and a first residual portion 42. The first light-emitting portion 41 is arranged on the back panel 10 on one side of the pixel definition block 21 and extends to the pixel definition block 21 and the partition block 31. The first residual portion 42 is arranged on the bottom wall 341, and the first light-emitting portion 41 and the first residual portion 42 are spaced apart.

[0024] Optionally, the plurality of pixel definition blocks 21 are arranged at intervals in the second direction Y, and the second direction Y intersects with the first direction X.

[0025] Optionally, the substrate material of the back panel 10 can be glass, polycarbonate (PC), acrylonitrile butadiene styrene (ABS), ITO (indium tin oxide) film, silicon dioxide, amorphous silicon film, etc., without limitation. Specifically, the substrate of the back panel 10 is prepared using a glass substrate and TGV (Through-Glass Via) glass through-hole technology.

[0026] Optionally, the cross-sectional shape of the pixel definition block 21 in the first direction X may be a trapezoid, a rectangle, etc., without limitation. Specifically, the trapezoid may be an isosceles trapezoid. The material of the pixel definition block 21 may be metal (such as magnesium, silver, copper, aluminum, titanium, molybdenum, etc.), alloys of these metals, inorganic oxides (such as aluminum oxide, silicon dioxide, etc.), and organic transparent materials (such as ITO, etc.), without limitation.

[0027] Optionally, the material of the partition block 31 may be silicon nitride (SiNx), silicon oxide (SiO2), silicon oxynitride (SiON), etc., without limitation.

[0028] Optionally, the bottom wall 341 of the dovetail groove 34 may be a flat surface or a smooth curved surface without limitation.

[0029] Optionally, the first surface 32 of the partition block 31 does not exceed the pixel definition block 21 in the second direction Y, that is, the orthographic projection of the first surface 32 in the first direction X is located in the surface of the pixel definition block 21 away from the backplane 10 .

[0030] Optionally, the first light-emitting layer 40 is composed of a structure consisting of a plurality of alternating thin layers and barrier layers. When the first light-emitting layer 40 is used to emit red light, the material of the first light-emitting layer 40 may be a phosphorescent material, specifically rubrene, PTPP, DCJTB, Tz-Gl, etc. When the first light-emitting layer 40 is used to emit green light, the material of the first light-emitting layer 40 may be a phosphorescent material, specifically Alaq3, TDETE, Coumarin, NpGl, etc. When the first light-emitting layer 40 is used to emit blue light, the material of the first light-emitting layer 40 may be a fluorescent material, a phosphorescent material, etc., without limitation. The first light-emitting portion 41 can emit light when current passes through it, and the first residual portion 42 cannot emit light when current does not pass through it, thereby achieving isolation of adjacent light-emitting layers. The first light-emitting portion 41 may also extend to the interval between the first surface 32 and the pixel definition block 21. Optionally, the first light-emitting layer 40 may extend to another adjacent pixel definition block 21 and the dovetail groove 34. Or, the first light-emitting layer 40 is only disposed on the backplane 10.

[0031] Optionally, the maximum size of the pixel definition block 21 in the first direction X is d1, and the depth of the dovetail groove 34 in the first direction X is d2, satisfying: 0.25≤d2 / d1≤0.5. Optionally, d2 / d1 can be 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, etc., without limitation. When d2 / d1>0.5, it means that the size of the dovetail groove 34 and the partition block 31 is too large, which may affect the overall thickness of the display panel 100; when d2 / d1<0.25, it means that the depth of the dovetail groove 34 is too small and may not be able to accommodate the first residual portion 42; when 0.25≤d2 / d1≤0.5, the depth of the dovetail groove 34 is moderate, which can accommodate the first residual portion 42 and ensure that the thickness of the display panel 100 is moderate.

[0032] The display panel 100 of the present application is provided with a partition block 31 having a dovetail groove 34 on the pixel definition block 21, and the first residual portion 42 of the first light-emitting layer 40 is accommodated in the dovetail groove 34 so as to be spaced apart from the first light-emitting portion 41. The partition block 31 and the dovetail groove 34 work together to enable the first light-emitting portion 41 to emit light when current passes through it, while the first residual portion 42 cannot emit light when no current passes through it, thereby achieving pixel isolation and improving problems such as pixel color deviation. The first light-emitting portion 41 extends to the pixel definition block 21 and the partition block 31, and water vapor and the like cannot penetrate from the gap between the first light-emitting portion 41 and the pixel definition block 21. Therefore, the display panel 100 of the present application has a good packaging effect and water vapor and the like are not easy to invade.

[0033] For reference Figure 2 , Figure 3 , Figure 4 and Figure 5 In one embodiment, the dovetail groove 34 also includes a first side wall 342 and a second side wall 343 arranged opposite to each other, the first side wall 342 is connected to the bottom wall 341 and has a first angle α, the second side wall 343 is connected to the bottom wall 341 and has a second angle β, satisfying: 30°≤α≤80°, 30°≤β≤80°.

[0034] Optionally, the first angle α and the second angle β may be the same or different, without limitation.

[0035] Optionally, α can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, etc. without limitation. β can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, etc. without limitation.

[0036] The first side wall 342 , the second side wall 343 , and the bottom wall 341 may be planes.

[0037] When α<30° and β<30°, the angle between the first side wall 342, the second side wall 343 and the bottom wall 341 is too small, the portion of the dovetail groove 34 that can accommodate the first residual portion 42 is small, and the space utilization effect of the partition block 31 is poor; when α>80° and β>80°, the angle between the first side wall 342, the second side wall 343 and the bottom wall 341 is too large, the first residual portion 42 may extend to the first side wall 342 and / or the second side wall 343, and the first light emitting layer 40 may be separated from the first light emitting layer 40. The first residual portion 42 is connected to the first light-emitting portion 41 and / or the second light-emitting portion 71 of the second light-emitting layer 70, thereby losing the spacing effect, which makes it easy for color deviation and other problems to occur between adjacent pixels; when 30°≤α≤80°, 30°≤β≤80°, the dovetail groove 34 can accommodate the first residual portion 42 to achieve the spacing setting of the first residual portion 42 and the first light-emitting portion 41, and the size of the dovetail groove 34 in the partition block 31 is moderate, and will not excessively occupy the internal space of the partition block 31, thereby ensuring the structural stability of the partition block 31.

[0038] For reference Figure 2 and Figure 3 In one embodiment, the display panel 100 further includes a first inorganic layer 61 stacked in sequence in the first direction X, and the first inorganic layer 61 is disposed on a side of the first light-emitting layer 40 that is away from the backplane 10 .

[0039] The first inorganic layer 61 is usually prepared by processes such as chemical vapor deposition (CVD), physical vapor deposition (PVD) or atomic layer deposition (ALD), so as to control the thickness, uniformity and density of the first inorganic layer 61, thereby ensuring its excellent barrier properties.

[0040] Optionally, the material of the first inorganic layer 61 is the same as the material of the partition block 31 . Specifically, the first inorganic layer 61 may be silicon nitride (SiNx), silicon oxide (SiO2), silicon oxynitride (SiON), etc., without limitation.

[0041] Optionally, the display panel 100 further includes an organic layer 62 and a second inorganic layer 63 sequentially stacked in the first direction X. The material of the second inorganic layer 63 may be the same as that of the first inorganic layer 61. Specifically, the first inorganic layer 61 may be silicon nitride (SiNx), silicon oxide (SiO2), silicon oxynitride (SiON), etc., without limitation. The material of the organic layer 62 may be polyimide-based photosensitive polymers, epoxy resins or acrylic-based organic materials, organic silicon compounds (hexamethyldisiloxane, etc.), etc., without limitation. The organic layer 62 may be formed by photolithography, coating, printing, etc.

[0042] In the multi-layer packaging structure, the first inorganic layer 61, the organic layer 62 and the second inorganic layer 63 are arranged alternately, the organic layer 62 usually plays a flattening role, and the first inorganic layer 61 and the second inorganic layer 63 provide additional structural support for the organic layer 62, which helps to maintain the flatness and uniformity of the packaging structure of the entire display panel 100. In the multi-layer packaging structure, the interaction between the first inorganic layer 61, the second inorganic layer 63 and the organic layer 62 helps to reduce the risk of peeling. The organic layer 62 can release the stress between the first inorganic layer 61 and the second inorganic layer 63, and increase the contact area between the first inorganic layer 61 and the second inorganic layer 63 through through holes, etc., thereby reducing the possibility of peeling.

[0043] The first inorganic layer 61 is usually used as part of the encapsulation layer to protect the first light-emitting layer 40 and other structures from the external environment, especially the penetration of moisture and oxygen, so as to extend the service life of the display panel 100. The first inorganic layer 61 can also provide a certain mechanical strength to protect the first light-emitting layer 40 and other structures from physical damage.

[0044] For reference Figure 6 and Figure 7 In one embodiment, the display panel 100 further includes a partition boss 50, which is disposed on the bottom wall 341, and a distance between the bottom wall 341 and the second surface 33 in the first direction X is h1, and a maximum dimension of the partition boss 50 in the first direction X is h2, satisfying: h1>h2.

[0045] Optionally, the partition boss 50 and the partition block 31 may be an integrated structure or a split structure, without limitation.

[0046] Optionally, the partition boss 50 and the partition block 31 are made of the same material, which may be silicon nitride (SiNx), silicon oxide (SiO2), silicon oxynitride (SiON), etc., without limitation.

[0047] The maximum size of the partition boss 50 is limited so that the partition boss 50 does not protrude from the second surface 33. Part of the first residual portion 42 is arranged on the side and / or end surface of the partition boss 50. The arrangement of the partition boss 50 can facilitate the continuous arrangement of the first inorganic layer 61. In the display panel 100 without the partition boss 50, the first inorganic layer 61 may only cover the second surface 33 of the partition block 31 and the first residual portion 42 received in the dovetail groove 34, and there may be a slight gap in the first inorganic layer 61. The partition block 31 has a partition boss 50. During the process of forming the first light-emitting layer 40 and the first inorganic layer 61, the first light-emitting portion 41 and the first residual portion 42 of the first light-emitting layer 40 are disconnected at the dovetail groove 34, and the film formation of the first inorganic layer 61 will fill the height difference between the first light-emitting portion 41 and the first residual portion 42, thereby achieving complete continuity of the first inorganic layer 61, further reducing the path for water vapor and the like to invade the interior of the display panel 100, improving the packaging effect of the display panel 100, and increasing the life of the display panel 100.

[0048] For reference Figure 6 and Figure 7 In one embodiment, the cross-sectional shape of the partition boss 50 in the first direction X is a trapezoid or a triangle.

[0049] Specifically, the cross-sectional shape of the partition boss 50 in the first direction X is an isosceles trapezoid or an isosceles triangle. Part of the first residual portion 42 may be disposed on the waist and / or the bottom wall 341 of the trapezoid.

[0050] Optionally, the partition boss 50 may be disposed in a middle region of the bottom wall 341 of the dovetail groove 34 .

[0051] Such an arrangement enables the first residual portion 42 to be disposed on the side wall of the partition boss 50, thereby reducing the required dimensions of the dovetail groove 34 and the partition block 31 in the second direction Y, so that more partition blocks 31 and light-emitting layers can be disposed on the fixed back plate 10, thereby increasing the number of pixels per inch of the display panel 100, and thus improving the display effect of the display panel 100.

[0052] For reference Figure 7 In one embodiment, the size of the first inorganic layer 61 in the first direction X is h3, and the size of the first light-emitting layer 40 in the first direction X is h4, satisfying: h4

[0053] Specifically, h1 is the distance between the bottom wall 341 and the second surface 33 in the first direction X, h2 is the maximum dimension of the partition boss 50 in the first direction X, and h1-h2 corresponds to the dimension of the second surface 33 of the partition block 31 and the surface of the partition boss 50 away from the pixel definition block 21 in the first direction X.

[0054] ​When h1-h2<h4, the portion of the first residual portion 42 of the first light-emitting layer 40 located on the top of the partition boss 50 will exceed the second surface 33, so that the first residual portion 42 and the first light-emitting portion 41 may be partially connected, and the pixel isolation function of the dovetail groove 34 and the partition block 31 is lost; when h1-h2>h3, the size of the first inorganic layer 61 in the first direction X is too small, making it impossible for the first inorganic layer 61 to be continuous, thereby having the same effect as the partition block 31 without the partition boss 50.

[0055] For reference Figure 2 , Figure 3 , Figure 4 and Figure 5 In one embodiment, the display panel 100 also includes a second light-emitting layer 70, the second light-emitting layer 70 includes a second light-emitting portion 71 and a second residual portion 72, the second light-emitting portion 71 is arranged on the side of the partition block 31 facing away from the first light-emitting portion 41, and the second residual portion 72 is accommodated in the dovetail groove 34.

[0056] Optionally, the second light emitting layer 70 and the first light emitting layer 40 emit light of different colors.

[0057] The second residual portion 72 and the first residual portion 42 may be partially stacked, completely stacked, or spaced apart in the dovetail groove 34, without limitation. Optionally, the second light-emitting layer 70 may extend into another adjacent pixel definition block 21 and dovetail groove 34. Specifically, in the three pixel definition blocks 21 and dovetail grooves 34 arranged in sequence, the first light-emitting portion 41 is arranged on the side walls of the first and second pixel definition blocks 21, the first residual portion 42 is arranged in the first and second dovetail grooves 34, the second light-emitting portion 71 is arranged on the side walls of the second and third pixel definition blocks 21, and the second residual portion 72 is arranged in the second and third dovetail grooves 34.

[0058] The second light-emitting portion 71 and the first light-emitting portion 41 are arranged on both sides of the same partition block 31, and the first residual portion 42 and the second residual portion 72 are both received in the dovetail groove 34 of the same partition block 31. No current flows through the first residual portion 42 and the second residual portion 72, so that no light is emitted, thereby achieving isolation between the first light-emitting layer 40 and the second light-emitting layer 70. The present application provides a display device, including a housing and the display panel 100 according to any one of the aforementioned various embodiments.

[0059] Optionally, the display device also includes a control panel, an interface, a power supply, other components, etc.

[0060] The control board is suitable for receiving signals (such as video signals) from external devices and converting them into signals that can be understood by the driving circuit. The control board can also be used for image processing to optimize the display effect of the image.

[0061] The interface may be HDMI, DisplayPort, USB-C, etc., without limitation, so that the display device can be connected to an external device (such as a computer, a game console, a media player, etc.).

[0062] The housing is adapted to provide physical protection and support for the display device while protecting the internal components from dust, moisture, and other external elements.

[0063] The power source is suitable for providing the required power to the display device, and the power source may be a built-in power adapter or a battery.

[0064] Other components may be touch screens, speakers, cameras, sensors, etc.

[0065] The display device of the display panel 100 of the present application is provided with a partition block 31 having a dovetail groove 34 on the pixel definition block 21, and the first residual portion 42 of the first light-emitting layer 40 is accommodated in the dovetail groove 34 so as to be spaced apart from the first light-emitting portion 41. The partition block 31 and the dovetail groove 34 work together to enable the first light-emitting portion 41 to emit light when current passes through it, while the first residual portion 42 cannot emit light when no current passes through it, thereby achieving pixel isolation and improving problems such as pixel color deviation. The first light-emitting portion 41 extends to the pixel definition block 21 and the partition block 31, and water vapor and the like cannot penetrate from the gap between the first light-emitting portion 41 and the pixel definition block 21. Therefore, the display device of the present application has a good packaging effect, water vapor and the like are not easily invaded, and the service life of the display device is improved.

[0066] For reference Figure 8 The present application provides a method for manufacturing a display panel 100, comprising: Step S10 , forming a pixel definition layer 20 on the backplane 10 along a first direction X.

[0067] In step S20 , a partition layer 30 is formed on the pixel definition layer 20 , wherein the partition layer 30 has a dovetail groove 34 .

[0068] Step S30 , forming a first light emitting layer 40 on the back plate 10 and the bottom wall 341 of the dovetail groove 34 .

[0069] Among them, the pixel definition layer 20 includes a plurality of pixel definition blocks 21 arranged at intervals; the partition layer 30 includes a plurality of partition blocks 31, and the plurality of partition blocks 31 are arranged one by one on the surface of the pixel definition block 21 facing away from the back plate 10, and the partition block 31 has a first surface 32 and a second surface 33 arranged opposite to each other in the first direction X, and the first surface 32 is connected to the pixel definition block 21, and the partition block 31 has a dovetail groove 34 opened from the second surface 33, and the dovetail groove 34 has a bottom wall 341 arranged at intervals from the pixel definition block 21; the first light-emitting layer 40 includes a first light-emitting portion 41 and a first residual portion 42 arranged at intervals, the first light-emitting portion 41 is arranged on the back plate 10, and the first residual portion 42 is arranged on the bottom wall 341.

[0070] The method for forming the pixel definition layer 20 on the backplane 10 in step S10 may be coating, multi-layer exposure and etching, inkjet printing, etc., without limitation. Specifically, the pixel definition layer 20 may be formed by coating, exposure, development, and other process steps.

[0071] In step S20, the partition layer 30 has a dovetail groove 34, and the partition block 31 having the dovetail groove 34 can be directly generated, or the dovetail groove 34 can be generated by removing part of the structure in the partition block 31, without limitation.

[0072] In step S30 , the first light emitting layer 40 may be formed by a process such as evaporation or inkjet printing.

[0073] Optionally, the manufacturing method of the display panel 100 also includes: forming a second light-emitting layer 70 on the back panel 10 and the bottom wall 341 of the dovetail groove 34; forming a first inorganic layer 61 on the surface of the first light-emitting layer 40 and the second light-emitting layer 70 facing away from the back panel 10; forming an organic layer 62 on the surface of the first inorganic layer 61 facing away from the back panel 10; and forming a second inorganic layer 63 on the surface of the organic layer 62 facing away from the back panel 10.

[0074] For reference Fig. 9 and Fig.10 In one implementation, step S20 includes: Step S21 , forming a first pre-processing layer 81 on the pixel definition layer 20 .

[0075] Step S22 , forming a photoresist structure 82 on the first pretreatment layer 81 .

[0076] Step S23 , forming a second pre-treatment layer 83 on the photoresist structure 82 and the first pre-treatment layer 81 .

[0077] In step S24 , a portion of the second pre-treatment layer 83 and the photoresist structure 82 is removed to form a dovetail groove 34 .

[0078] Optionally, the first pretreatment layer 81 , the second pretreatment layer 83 and the first inorganic layer 61 are made of the same material, which may be silicon nitride (SiNx), silicon oxide (SiO 2 ), silicon oxynitride (SiON), etc., without limitation.

[0079] For reference Fig.11 In step S21, the first pre-processing layer 81 is disposed on the pixel definition block 21 in the second direction Y. The cross-section of the first pre-processing layer 81 in the first direction X is formed into a rectangle or a trapezoid, etc., without limitation. If the display panel 100 includes the partition boss 50, the first pre-processing layer 81 includes a support portion 811 and a protrusion 812, the support portion 811 is connected to the pixel definition block 21, the protrusion 812 is disposed on the surface of the support portion 811 facing away from the pixel definition block 21, the cross-sectional shape of the protrusion 812 in the first direction X can be correspondingly set to a trapezoid or a triangle, and the protrusion 812 corresponds to the partition boss 50.

[0080] In step S22, the photoresist structure 82 may include a resin, a photosensitizer, and a solvent; the resin is the skeleton of the photoresist structure 82, providing a basic structure and physical support; the photosensitizer includes a diazonaphthoquinone compound, which is sensitive to light of a specific wavelength. When exposed to ultraviolet light, the photosensitizer decomposes to produce carboxylic acid or free radicals, inducing chemical changes in the resin; the solvent is used to adjust the fluidity of the photoresist structure 82, and the proportion is usually more than 60%. Propylene glycol methyl ether acetate (PGMEA) is a commonly used solvent. The shape of the photoresist structure 82 is set corresponding to the space in the dovetail groove 34.

[0081] In step S23, the second pre-processing layer 83 is respectively disposed on the surface of the back plate 10, the surface of the photoresist structure 82 facing away from the pixel definition block 21, the sidewall of the pixel definition layer 20, etc. The second pre-processing layer 83 can be formed by coating, inkjet printing, etc., without limitation.

[0082] Step S24, the method of removing part of the second pretreatment layer 83 can be etching, laser stripping, chemical dissolution, mechanical stripping, thermal stripping, plasma treatment, etc., without limitation. The method of removing the photoresist structure 82 can be inorganic oxidation removal, organic wet removal, oxygen plasma ashing combined with inorganic oxidation removal, oxygen plasma ashing combined with organic wet removal, ultrasonic cleaning technology, laser removal technology, etc., without limitation. The removed second pretreatment layer 83 includes the second pretreatment layer 83 located on the back plate 10, the second pretreatment layer 83 located on the side wall of the pixel definition block 21, and the second pretreatment layer 83 protruding from the second surface 33 and the photoresist structure 82. Optionally, a part of the second pretreatment layer 83 is first removed to expose the photoresist structure 82, and then the photoresist structure 82 is eliminated.

[0083] The partition block 31 and the dovetail groove 34 are formed by providing and removing the photoresist structure 82 and a portion of the second pre-treatment layer 83 , thereby simplifying the etching process and other steps in the process of forming the dovetail groove 34 .

[0084] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0085] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A display panel, characterized in that: include: A backplane, a pixel definition layer, and a partition layer are sequentially stacked in a first direction; The pixel definition layer includes a plurality of pixel definition blocks arranged at intervals; The isolation layer includes a plurality of isolation blocks, and the plurality of isolation blocks are arranged one by one on the surface of the pixel definition block facing away from the back plate; The partition block has a first surface and a second surface disposed opposite to each other in the first direction, the first surface is connected to the pixel definition block, the partition block has a dovetail groove formed on the second surface, and the dovetail groove has a bottom wall spaced apart from the pixel definition block; The first light-emitting layer includes a first light-emitting portion and a first residual portion, wherein the first light-emitting portion is arranged on the back plate on one side of the pixel definition block and extends to the pixel definition block and the partition block, and the first residual portion is arranged on the bottom wall, and the first light-emitting portion and the first residual portion are spaced apart.

2. The display panel according to claim 1, characterized in that: The dovetail groove also includes a first side wall and a second side wall arranged opposite to each other, the first side wall is connected to the bottom wall and has a first angle α, the second side wall is connected to the bottom wall and has a second angle β, satisfying: 30°≤α≤80°, 30°≤β≤80°.

3. The display panel according to claim 1, characterized in that: The display panel further includes a partition boss, which is disposed on the bottom wall. The distance between the bottom wall and the second surface in the first direction is h1, and the maximum size of the partition boss in the first direction is h2, satisfying: h1>h2.

4. The display panel according to claim 3, characterized in that: The cross-sectional shape of the partition boss in the first direction is a trapezoid or a triangle.

5. The display panel according to claim 3, characterized in that: The display panel further includes first inorganic layers stacked in sequence in the first direction, and the first inorganic layers are arranged on a side of the first light-emitting layer facing away from the backplane.

6. The display panel according to claim 5, characterized in that: The size of the first inorganic layer in the first direction is h3, and the size of the first light-emitting layer in the first direction is h4, satisfying: h4<h1-h2<h3.

7. The display panel according to claim 1, characterized in that: The display panel further includes a second light-emitting layer, the second light-emitting layer includes a second light-emitting portion and a second residual portion, the second light-emitting portion is arranged on a side of the partition block facing away from the first light-emitting portion, and the second residual portion is received in the dovetail groove.

8. A display device, characterized in that: The device comprises a housing and a display panel as claimed in any one of claims 1 to 7.

9. A method for manufacturing a display panel, characterized in that: include: forming a pixel definition layer on the backplane along a first direction; forming a partition layer on the pixel definition layer, wherein the partition layer has a dovetail groove; forming a first light-emitting layer on the back plate and the bottom wall of the dovetail groove; Wherein, the pixel definition layer includes a plurality of pixel definition blocks arranged at intervals; The partition layer comprises a plurality of partition blocks, the plurality of partition blocks are arranged one by one on the surface of the pixel definition block facing away from the back plate, the partition block has a first surface and a second surface arranged opposite to each other in the first direction, the first surface is connected to the pixel definition block, the partition block is provided with the dovetail groove from the second surface, and the dovetail groove has a bottom wall spaced apart from the pixel definition block; The first light-emitting layer includes a first light-emitting portion and a first residual portion which are arranged at intervals. The first light-emitting portion is arranged on the back plate, and the first residual portion is arranged on the bottom wall.

10. The method for manufacturing a display panel according to claim 9, characterized in that: A partition layer is formed on the pixel definition layer, wherein the partition layer has a dovetail groove, including: forming a first pre-processing layer on the pixel definition layer; forming a photoresist structure on the first pretreatment layer; forming a second pretreatment layer on the photoresist structure and the first pretreatment layer; The dovetail groove is formed by removing a portion of the second pretreatment layer and the photoresist structure.

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