Display panel and display device

Abstract

This application relates to a display panel and a display device; the display panel includes an organic layer, an isolation structure, and an organic functional layer; the isolation structure is disposed on the organic layer; the organic functional layer is disposed on the isolation structure and the organic layer; wherein, the organic layer forms a first undercut opening at the edge of the isolation structure, and a second undercut opening is formed on the side of the isolation structure, and the organic functional layer is separated at the first undercut opening and / or the second undercut opening; this application can more effectively isolate the organic functional layer, which can avoid problems such as moisture intrusion or leakage, enhance the stability of the display panel, and improve the display effect of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] Organic light-emitting diode (OLED) display panels feature low power consumption, fast response speed, and wide viewing angle, making them promising for future applications. Currently, OLED display technology is widely used in various electronic products, from small items like smart bracelets, smartwatches, smartphones, and tablets to large devices such as laptops, desktop computers, and televisions.

[0003] In OLED display panels, when organic functional layers (such as light-emitting layers, electron layers, and hole layers) are prepared using a vapor deposition process, they are usually applied to the entire surface of the display panel. However, when organic functional layers are applied to the entire surface, some problems can easily occur, such as moisture intrusion or leakage, which can reduce the stability of the display panel and affect its display performance. Summary of the Invention

[0004] This application provides a display panel and display device that can effectively isolate the organic functional layer, enhance the stability of the display panel, and improve the display effect of the display panel.

[0005] This application provides a display panel, which includes:

[0006] Organic layer;

[0007] An isolation structure is disposed on the organic layer;

[0008] An organic functional layer is disposed on the isolation structure and the organic layer;

[0009] Wherein, the organic layer forms a first undercut opening at the edge of the isolation structure, the side of the isolation structure forms a second undercut opening, and the organic functional layer is separated at the first undercut opening and / or the second undercut opening.

[0010] In one embodiment of this application, the organic layer includes a body portion and a protrusion connected to the body portion near the isolation structure, wherein the isolation structure is disposed on the side of the protrusion portion away from the body portion;

[0011] The protrusion includes a first surface near the side of the isolation structure and a first side surface connected to the first surface. At least a portion of the first side surface is recessed inward toward the center of the protrusion relative to the edge of the isolation structure near the protrusion to form the first undercut opening.

[0012] In one embodiment of this application, the isolation structure includes a second surface away from the protrusion, a third surface near the protrusion, and a second side surface connecting the second surface and the third surface, wherein a portion of the second side surface is recessed toward the center of the isolation structure to form the second undercut opening.

[0013] In one embodiment of this application, the isolation structure includes a first sub-layer, a second sub-layer, and a third sub-layer stacked together, wherein the second sub-layer is located between the first sub-layer and the third sub-layer;

[0014] At the second side, the edge of the second sub-layer is recessed relative to the edges of the first sub-layer and the third sub-layer toward the center of the second sub-layer to form the second undercut opening.

[0015] In one embodiment of this application, the organic functional layer includes a first sub-part located on the side of the isolation structure away from the protrusion and a second sub-part located on the side of the body portion close to the protrusion, with the first sub-part and the second sub-part being spaced apart.

[0016] In one embodiment of this application, the organic functional layer includes a first sub-part located on the side of the isolation structure away from the protrusion, a second sub-part located on the side of the body portion close to the protrusion, and a third sub-part located within the second undercut opening, wherein the first sub-part, the second sub-part, and the third sub-part are spaced apart from each other.

[0017] In one embodiment of this application, the first undercut opening and the second undercut opening at least partially overlap along the thickness direction of the display panel.

[0018] In one embodiment of this application, the maximum depth of the first undercut opening along the direction from the edge of the protrusion to the center of the protrusion is greater than or equal to the maximum depth of the second undercut opening along the direction from the edge of the isolation structure to the center of the isolation structure.

[0019] In one embodiment of this application, the display panel includes a plurality of isolation structures spaced apart, a groove located between two adjacent isolation structures, and a filling portion disposed between two adjacent isolation structures, wherein the filling portion fills the groove and protrudes from the surface of the isolation structure away from the organic layer;

[0020] The first undercut opening and the second undercut opening are located at least on the side of the isolation structure away from the filling portion.

[0021] In one embodiment of this application, the organic functional layer includes an organic light-emitting layer, the display panel further includes a display area and a non-display area adjacent to the display area, and the isolation structure is disposed within the display area and / or the non-display area.

[0022] In one embodiment of this application, the isolation structure is disposed around the display area.

[0023] In one embodiment of this application, the display panel further includes an opening area disposed adjacent to the display area, the display panel having an opening located within the opening area, the opening passing through a portion of the film layer in the display panel, and the isolation structure being disposed around the opening area.

[0024] In one embodiment of this application, the display area includes a plurality of pixel areas, and the isolation structure is disposed between adjacent pixel areas.

[0025] In one embodiment of this application, the display panel further includes:

[0026] substrate;

[0027] A thin-film transistor layer is disposed on the substrate;

[0028] A planarization layer is disposed on the side of the thin-film transistor layer away from the substrate;

[0029] A pixel definition layer is disposed on the side of the planar layer away from the thin-film transistor layer;

[0030] The organic layer is reused as either the planarization layer or the pixel definition layer.

[0031] In one embodiment of this application, when the organic layer is the planarization layer, the display panel further includes an anode layer disposed on the planarization layer, the anode layer including anodes and the isolation structure disposed at intervals, and the pixel definition layer having a first opening corresponding to the anode and a second opening corresponding to the isolation structure;

[0032] Alternatively, when the organic layer is the planarization layer, the planarization layer includes a plurality of planar sublayers, and the display panel further includes a conductive layer disposed between adjacent planar sublayers, the conductive layer including a first adapter cable and the isolation structure.

[0033] In one embodiment of this application, when the organic layer is the pixel definition layer, the isolation structure is disposed on the side of the pixel definition layer away from the planarization layer.

[0034] In one embodiment of this application, the organic functional layer further includes a light-emitting auxiliary layer stacked with the organic light-emitting layer, and the light-emitting auxiliary layer includes at least one of an electron injection layer, an electron transport layer, a hole injection layer, and a hole transport layer.

[0035] In accordance with the above-mentioned objectives of this application, embodiments of this application also provide a display device, the display device including the display panel.

[0036] This application provides a display panel and display device. By setting an isolation structure on the organic layer, a first undercut opening can be formed between the isolation structure and the organic layer, and a second undercut opening can be formed in the isolation structure. The two undercut openings cooperate to more effectively isolate the organic functional layer, which can avoid problems such as water vapor intrusion or leakage, enhance the stability of the display panel, and improve the display effect of the display panel.

[0037] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0040] Figure 1 A schematic diagram of a partition structure provided in an embodiment of this application;

[0041] Figure 2 This is a schematic diagram of a first structure of a display panel provided in an embodiment of this application;

[0042] Figure 3 This is a schematic diagram of another structure at the partition structure provided in the embodiments of this application;

[0043] Figure 4 This is a schematic diagram of a first planar distribution structure of a display panel provided in an embodiment of this application;

[0044] Figure 5 This is a schematic diagram of a second structure of the display panel provided in an embodiment of this application;

[0045] Figure 6 This is a schematic diagram of a third structure of the display panel provided in an embodiment of this application;

[0046] Figure 7 This is a schematic diagram of a second planar distribution structure of a display panel provided in an embodiment of this application;

[0047] Figure 8 This is a schematic diagram of a fourth structure of the display panel provided in an embodiment of this application;

[0048] Figure 9 A fifth structural schematic diagram of the display panel provided in an embodiment of this application;

[0049] Figure 10 A sixth structural schematic diagram of the display panel provided in an embodiment of this application;

[0050] Figure 11 This is a schematic diagram of a third planar distribution structure of a display panel provided in an embodiment of this application;

[0051] Figure 12 A seventh structural schematic diagram of a display panel provided in an embodiment of this application;

[0052] Figure 13 A schematic diagram of an eighth structure of a display panel provided in an embodiment of this application;

[0053] Figure 14 A ninth structural schematic diagram of a display panel provided in an embodiment of this application;

[0054] Figure 15 A schematic diagram of a planar distribution structure of the pixel area of ​​a display panel provided in an embodiment of this application;

[0055] Figure 16 A schematic diagram of a tenth structure of a display panel provided in an embodiment of this application;

[0056] Figures 17 to 19 This is a schematic diagram illustrating the manufacturing process of the isolation structure of the display panel provided in this embodiment.

[0057] Explanation of reference numerals in the attached figures:

[0058] 10. Organic layer; 11. Body portion; 12. Protrusion portion; 101. First bottom cut opening; 121. First surface; 122. First side surface; 110. Display area; 120. Non-display area; 130. Opening area; 1101. Pixel area; 1100. Organic material layer;

[0059] 20. Isolation structure; 21. First sublayer; 22. Second sublayer; 23. Third sublayer; 201. Second undercut opening; 202. Groove; 203. Notch; 211. Second surface; 212. Third surface; 213. Second side surface; 24. Filler; 200. Isolation material layer; 210. First material layer; 220. Second material layer; 230. Third material layer;

[0060] 30. Organic functional layer; 31. First sub-section; 32. Second sub-section; 33. Third sub-section;

[0061] 40. Substrate;

[0062] 50. Thin-film transistor layer; 51. Gate insulating layer; 52. First interlayer dielectric layer; 53. Second interlayer dielectric layer; 54. Active layer; 55. Gate; 56. Source; 57. Drain; 58. Second transition line; 501. Opening;

[0063] 60. Flattening layer; 61. First flattening sublayer; 62. Second flattening sublayer;

[0064] 70. Pixel definition layer; 701. First opening; 702. Second opening; 703. Third opening;

[0065] 81. Conductive layer; 811. First adapter cable; 82. Anode layer; 821. Anode; 83. Cathode layer. Detailed Implementation

[0066] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0067] Please refer to Figure 1 This application provides a display panel, which includes an organic layer 10, an isolation structure 20, and an organic functional layer 30; the isolation structure 20 is disposed on the organic layer 10; and the organic functional layer 30 is disposed on the isolation structure 20 and the organic layer 10.

[0068] Wherein, the organic layer 10 forms a first undercut opening 101 at the edge of the isolation structure 20, the side of the isolation structure 20 forms a second undercut opening 201, and the organic functional layer 30 is separated at the first undercut opening 101 and / or the second undercut opening 201.

[0069] In the implementation process, this application embodiment provides an isolation structure 20 on the organic layer 10. The isolation structure 20 can form a first undercut opening 101 with the organic layer 10, and a second undercut opening 201 can be formed in the isolation structure 20. The two undercut openings cooperate to more effectively isolate the organic functional layer 30, which can avoid problems such as water vapor intrusion or leakage, enhance the stability of the display panel, and improve the display effect of the display panel.

[0070] Specifically, please combine Figure 1 as well as Figure 2 In some embodiments, the display panel includes a substrate 40, a thin-film transistor layer 50 disposed on the substrate 40, a planarization layer 60 disposed on the side of the thin-film transistor layer 50 away from the substrate 40, and a pixel definition layer 70 disposed on the side of the planarization layer 60 away from the thin-film transistor layer 50; the organic functional layer 30 at least covers the pixel definition layer 70.

[0071] In some embodiments, the thin-film transistor layer 50 includes a gate insulating layer 51 disposed on the substrate 40, a first interlayer dielectric layer 52 disposed on the side of the gate insulating layer 51 away from the substrate 40, and a second interlayer dielectric layer 53 disposed on the side of the first interlayer dielectric layer 52 away from the gate insulating layer 51; the thin-film transistor layer 50 further includes an active layer 54 disposed on the substrate 40 and covered by the gate insulating layer 51, a gate 55 disposed on the gate insulating layer 51 and covered by the first interlayer dielectric layer 52, and a source 56 and a drain 57 disposed on the first interlayer dielectric layer 52 and covered by the second interlayer dielectric layer 53; the gate 55 is disposed on the side of the active layer 54 away from the substrate 40, and the source 56 and the drain 57 overlap with the opposite sides of the active layer 54 through the first interlayer dielectric layer 52 and the gate insulating layer 51.

[0072] In some embodiments, the display panel further includes a second adapter cable 58 disposed on the second interlayer dielectric layer 53 and covered by the planarization layer 60, the second adapter cable 58 being able to pass through the second interlayer dielectric layer 53 and connect to the drain 57.

[0073] In some embodiments, the flattening layer 60 may include a plurality of flattening sublayers and a conductive layer 81 disposed between adjacent flattening sublayers.

[0074] The planarization layer 60 may include a first planarization sublayer 61 and a second planarization sublayer 62 stacked together; the display panel further includes a conductive layer 81 disposed between the first planarization sublayer 61 and the second planarization sublayer 62, and the conductive layer 81 includes a first adapter cable 811 disposed on the first planarization sublayer 61 and covered by the second planarization sublayer 62, the first adapter cable 811 passing through the first planarization sublayer 61 and connecting to the second adapter cable 58.

[0075] In some embodiments, the display panel further includes an anode layer 82 disposed on the planarization layer 60, the anode layer 82 including a plurality of anodes 821 disposed on the planarization layer 60; that is, the anodes 821 are disposed on the side of the second planarization sublayer 62 away from the first planarization sublayer 61; the illustrations provided in this application embodiment only show one of the anodes 821 as an example for explanation.

[0076] Furthermore, the pixel definition layer 70 is disposed on the side of the planarization layer 60 away from the thin film transistor layer 50, and the pixel definition layer 70 has a plurality of first openings 701 corresponding to the plurality of anodes 821, the first openings 701 exposing the upper surface of the corresponding anode 821.

[0077] In some embodiments, the organic functional layer 30 covers the side of the pixel definition layer 70 away from the planarization layer 60 and extends into the first opening 701, wherein the organic functional layer 30 extending into the first opening 701 is located on the upper surface of the anode 821.

[0078] In some embodiments, the display panel further includes a cathode layer (not shown in the figure) disposed on the side of the organic functional layer 30 away from the pixel definition layer 70.

[0079] It should be noted that the organic functional layer 30 may include an organic light-emitting layer. In this embodiment, the organic functional layer 30 is isolated by setting the isolation structure 20, thereby preventing moisture from entering the display panel through the organic functional layer 30 and reducing the probability of lateral leakage current in the organic functional layer 30.

[0080] In some embodiments, the organic functional layer 30 further includes a light-emitting auxiliary layer stacked with the organic light-emitting layer, and the light-emitting auxiliary layer includes at least one of an electron injection layer, an electron transport layer, a hole injection layer, and a hole transport layer.

[0081] In this embodiment, the organic layer 10 forms a first undercut opening 101 at the edge of the isolation structure 20, and the side of the isolation structure 20 forms a second undercut opening 201. The organic functional layer 30 is isolated at the first undercut opening 101 and / or the second undercut opening 201. That is, in this embodiment, double undercut openings can be formed in the isolation structure 20 and the organic layer 10 below it, which can better isolate the organic functional layer 30, effectively prevent moisture from entering the display panel through the organic functional layer 30, and reduce the probability of lateral leakage current in the organic functional layer 30.

[0082] In some embodiments, the organic layer 10 includes a body portion 11 and a protrusion 12 connected to the body portion 11 near the side of the isolation structure 20, the isolation structure 20 being disposed on the side of the protrusion 12 away from the body portion 11; wherein, the protrusion 12 includes a first surface 121 near the side of the isolation structure 20 and a first side surface 122 connected to the first surface 121, at least a portion of the first side surface 122 being recessed inward toward the center of the protrusion 12 relative to the edge of the isolation structure 20 near the side of the protrusion 12 to form the first undercut opening 101; it is understood that the The isolation structure 20 can be made of a metallic material or a material different from that of the organic layer 10. When the isolation structure 20 is formed on the organic layer 10, and the organic layer 10 is etched, the thickness of the organic layer 10 is reduced. The portion with reduced thickness is the body portion 11, while the portion covered by the isolation structure 20 is not etched, thus forming the protrusion 12. Therefore, the protrusion 12 is located between the isolation structure 20 and the body portion 11. The organic layer 10 is etched to a portion below the edge of the isolation structure 20 to form the first undercut opening 101.

[0083] In some embodiments, the isolation structure 20 includes a second surface 211 away from the protrusion 12, a third surface 212 near the protrusion 12, and a second side surface 213 connecting the second surface 211 and the third surface 212, wherein a portion of the second side surface 213 is recessed toward the center of the isolation structure 20 to form the second undercut opening 201.

[0084] It should be noted that the isolation structure 20 can be fabricated using multiple sub-layers, and the etching rate of the middle sub-layer is greater than that of the upper and lower sides, thereby causing the side of the isolation structure 20 to be etched to form the second bottom cut opening 201.

[0085] In some embodiments, the isolation structure 20 includes a first sub-layer 21, a second sub-layer 22, and a third sub-layer 23 stacked together, wherein the second sub-layer 22 is located between the first sub-layer 21 and the third sub-layer 23, and the first sub-layer 21 is located between the second sub-layer 22 and the protrusion 12.

[0086] Wherein, at the second side 213, the edge of the second sub-layer 22 is recessed inward toward the center of the second sub-layer 22 relative to the edge of the first sub-layer 21 and the edge of the third sub-layer 23 to form the second undercut opening 201.

[0087] In some embodiments, the materials of the first sublayer 21 and the third sublayer 23 may include at least one of Ti, Mo and indium tin oxide (ITO), while the material of the second sublayer 22 may include at least one of Al and Ag; for example, the stacked structure of the isolation structure 20 may be Ti / Al / Ti, Mo / Al / Mo or ITO / Ag / ITO.

[0088] Therefore, the organic functional layer 30 is separated at the first undercut opening 101 and the second undercut opening 201; in some embodiments, the organic functional layer 30 includes a first sub-part 31 located on the side of the isolation structure 20 away from the protrusion 12 and a second sub-part 32 located on the side of the body portion 11 close to the protrusion 12, the first sub-part 31 and the second sub-part 32 being spaced apart.

[0089] In other embodiments, the organic functional layer 30 includes a first sub-part 31 located on the side of the isolation structure 20 away from the protrusion 12, a second sub-part 32 located on the side of the body portion 11 close to the protrusion 12, and a third sub-part 33 located within the second undercut opening 201, wherein the first sub-part 31, the second sub-part 32, and the third sub-part 33 are spaced apart from each other.

[0090] Continuing from the above, this embodiment of the application sets up an isolation structure 20 with multiple sub-layers having different etching rates, and works in conjunction with the organic layer 10 to form the first undercut opening 101 and the second undercut opening 201 at the top and bottom. Thus, the double undercut openings can better isolate the organic functional layer 30, thereby blocking the water vapor intrusion channel and the leakage channel.

[0091] In some embodiments, such as Figure 1As shown, the first bottom cut opening 101 can be located on opposite sides of the isolation structure 20, and the second bottom cut opening 201 can also be located on opposite sides of the isolation structure 20, and the first bottom cut opening 101 and the second bottom cut opening 201 at least partially overlap along the thickness direction of the display panel.

[0092] In some embodiments, the maximum depth of the first undercut opening 101 along the direction from the edge of the protrusion 12 to the center of the protrusion 12 is greater than or equal to the maximum depth of the second undercut opening 201 along the direction from the edge of the isolation structure 20 to the center of the isolation structure 20.

[0093] In other embodiments of this application, the maximum depth of the first undercut opening 101 along the direction from the edge of the protrusion 12 to the center of the protrusion 12 may also be less than the maximum depth of the second undercut opening 201 along the direction from the edge of the isolation structure 20 to the center of the isolation structure 20. The specific depth can be set according to actual needs and is not limited here.

[0094] In some embodiments, such as Figure 3 As shown, the isolation structure 20 may include multiple structures, and each pair or more adjacent structures form a group. In this embodiment, each pair of adjacent isolation structures 20 forms a group, and a groove 202 is formed between two adjacent isolation structures 20. The display panel also includes a filling portion 24 disposed in the groove 202, and the filling portion 24 is disposed between two adjacent isolation structures 20 and fills the groove 202. The filling portion 24 protrudes from the surface of the isolation structure 20 away from the organic layer 10. The first undercut opening 101 and the second undercut opening 201 are at least located on the side of the isolation structure 20 away from the filling portion 24.

[0095] It should be noted that the first undercut opening 101 and the second undercut opening 201 may or may not be formed in the groove 202, but the first undercut opening 101 and the second undercut opening 201 in the groove 202 will be filled by the filling part 24; by providing the filling part 24 between multiple isolation structures 20 in a group, this application can effectively improve the structural stability of the isolation structure 20, reduce the probability of the isolation structure 20 collapsing and deforming, and further improve the isolation success rate of the isolation structure 20.

[0096] In the embodiments of this application, please refer to Figure 1 as well as Figure 2The display panel further includes a display area 110 and a non-display area 120 adjacent to the display area 110. The isolation structure 20 is disposed in the display area 110 and / or the non-display area 120; that is, the isolation structure 20 can be disposed in multiple positions on the display panel to achieve corresponding functions.

[0097] In one embodiment of this application, please refer to Figure 1 , Figure 2 as well as Figure 4 The isolation structure 20 is arranged around the display area 110.

[0098] In some embodiments, the isolation structure 20 may be disposed in the non-display area 120, and there may be multiple isolation structures 20, that is, multiple isolation structures 20 are concentrically arranged around the display area 110, and the multiple isolation structures 20 may be arranged in a... Figure 3 The structure shown is configured, while in this embodiment, it is used as... Figure 1 The isolation structure 20 shown is used as an example for description.

[0099] It is understood that the isolation structure 20 is arranged around the display area 110, thereby partially isolating the organic functional layer 30 from the non-display area 120 into the display area 110, thus blocking the moisture intrusion channel of the organic functional layer 30, reducing the probability of device damage to the display panel due to moisture intrusion, and improving the stability of the display panel.

[0100] Specifically, in this embodiment, the organic layer 10 is reused as the pixel definition layer 70, and the isolation structure 20 is disposed on the side of the pixel definition layer 70 away from the planar layer 60. Therefore, when the organic functional layer 30 extends to the isolation structure 20, it can be isolated at the first undercut opening 101 and / or the second undercut opening 201 to block the water vapor intrusion channel.

[0101] In another embodiment of this application, please refer to... Figure 1 , Figure 4 as well as Figure 5 The isolation structure 20 is arranged around the display area 110.

[0102] In some embodiments, the isolation structure 20 may be disposed in the non-display area 120, and there may be multiple isolation structures 20, that is, multiple isolation structures 20 are concentrically arranged around the display area 110, and the multiple isolation structures 20 may be arranged in a... Figure 3 The structure shown is configured, while in this embodiment, it is used as... Figure 1 The isolation structure 20 shown is used as an example for description.

[0103] It is understood that the isolation structure 20 is arranged around the display area 110, thereby partially isolating the organic functional layer 30 from the non-display area 120 into the display area 110, thus blocking the moisture intrusion channel of the organic functional layer 30, reducing the probability of device damage to the display panel due to moisture intrusion, and improving the stability of the display panel.

[0104] Specifically, in this embodiment, the organic layer 10 is reused as the planarization layer 60, and further, the organic layer 10 is reused as the second planarization sub-layer 62. The isolation structure 20 is disposed on the side of the second planarization sub-layer 62 away from the first planarization sub-layer 61. Thus, when the organic functional layer 30 extends to the isolation structure 20, it can be isolated at the first undercut opening 101 and / or the second undercut opening 201 to block the water vapor intrusion channel.

[0105] In some embodiments, the anode layer 82 may include the anode 821 and the isolation structure 20, that is, the isolation structure 20 may be formed in the same process as the anode 821, thereby saving process steps and reducing process costs.

[0106] In some embodiments, since the isolation structure 20 is disposed on the second flat sub-layer 62, the pixel definition layer 70 is removed at the position corresponding to the isolation structure 20. Therefore, when the isolation structure 20 is disposed around the display area 110, the pixel definition layer 70 is also isolated on the periphery of the display area 110, thereby blocking the moisture intrusion channel in the pixel definition layer 70, further improving the moisture blocking effect of the display panel, and improving the stability and service life of the display panel.

[0107] In another embodiment of this application, please refer to... Figure 1 , Figure 4 as well as Figure 6 The isolation structure 20 is arranged around the display area 110.

[0108] In some embodiments, the isolation structure 20 may be disposed in the non-display area 120, and there may be multiple isolation structures 20, that is, multiple isolation structures 20 are concentrically arranged around the display area 110, and the multiple isolation structures 20 may be arranged in a... Figure 3 The structure shown is configured, while in this embodiment, it is used as... Figure 1 The isolation structure 20 shown is used as an example for description.

[0109] It is understood that the isolation structure 20 is arranged around the display area 110, thereby partially isolating the organic functional layer 30 from the non-display area 120 into the display area 110, thus blocking the moisture intrusion channel of the organic functional layer 30, reducing the probability of device damage to the display panel due to moisture intrusion, and improving the stability of the display panel.

[0110] Specifically, in this embodiment, the organic layer 10 is reused as the planarization layer 60, and further, the organic layer 10 is reused as the first planarization sublayer 61. The isolation structure 20 is disposed on the side of the first planarization sublayer 61 away from the second interlayer medium layer 53. Thus, when the organic functional layer 30 extends to the isolation structure 20, it can be isolated at the first undercut opening 101 and / or the second undercut opening 201 to block the water vapor intrusion channel.

[0111] In some embodiments, the conductive layer 81 may include the first adapter cable 811 and the isolation structure 20, that is, the isolation structure 20 may be formed in the same process as the first adapter cable 811, thereby saving process steps and reducing process costs.

[0112] In some embodiments, since the isolation structure 20 is disposed on the first flat sub-layer 61, the pixel definition layer 70 and the second flat sub-layer 62 are removed at the positions corresponding to the isolation structure 20. Therefore, when the isolation structure 20 is disposed around the display area 110, the pixel definition layer 70 and the second flat sub-layer 62 are also isolated on the periphery of the display area 110, thereby blocking the moisture intrusion channels in the pixel definition layer 70 and the second flat sub-layer 62, further improving the moisture blocking effect of the display panel, and improving the stability and service life of the display panel.

[0113] In one embodiment of this application, please refer to Figure 1 , Figure 7 as well as Figure 8 The display panel further includes an opening area 130 adjacent to the display area 110, and the display panel has an opening 501 located in the opening area 130. The opening 501 can pass through a portion of the film layer in the display panel to improve the transmittance of the opening area 130. The opening area 130 can be used to place optical sensors, such as cameras and other devices.

[0114] In some embodiments, the aperture 501 may pass through the thin-film transistor layer 50, the planarization layer 60, the pixel definition layer 70, and the organic functional layer 30.

[0115] In this embodiment, the isolation structure 20 is arranged around the opening area 130, that is, the isolation structure 20 is arranged around the opening 501, which can isolate the part of the organic functional layer 30 that enters the display area 110 from the non-display area 120, thereby blocking the moisture intrusion channel of the organic functional layer 30, reducing the probability of device damage to the display panel due to moisture intrusion, and improving the stability of the display panel.

[0116] Specifically, in this embodiment, the organic layer 10 is reused as the pixel definition layer 70, and the isolation structure 20 is disposed on the side of the pixel definition layer 70 away from the planarization layer 60. Therefore, when the organic functional layer 30 extends from the opening area 130 to the isolation structure 20, it can be isolated at the first undercut opening 101 and / or the second undercut opening 201 to block the water vapor intrusion channel.

[0117] In another embodiment of this application, please refer to... Figure 1 , Figure 7 as well as Figure 9 The display panel further includes an opening area 130 adjacent to the display area 110, and the display panel has an opening 501 located in the opening area 130. The opening 501 can pass through a portion of the film layer in the display panel to improve the transmittance of the opening area 130. The opening area 130 can be used to place optical sensors, such as cameras and other devices.

[0118] In some embodiments, the aperture 501 may pass through the thin-film transistor layer 50, the planarization layer 60, the pixel definition layer 70, and the organic functional layer 30.

[0119] In this embodiment, the isolation structure 20 is arranged around the opening area 130, that is, the isolation structure 20 is arranged around the opening 501, which can isolate the part of the organic functional layer 30 that enters the display area 110 from the non-display area 120, thereby blocking the moisture intrusion channel of the organic functional layer 30, reducing the probability of device damage to the display panel due to moisture intrusion, and improving the stability of the display panel.

[0120] Specifically, in this embodiment, the organic layer 10 is reused as the planarization layer 60, and further, the organic layer 10 is reused as the second planarization sub-layer 62. The isolation structure 20 is disposed on the side of the second planarization sub-layer 62 away from the first planarization sub-layer 61. Thus, when the organic functional layer 30 extends from the opening area 130 to the isolation structure 20, it can be isolated at the first undercut opening 101 and / or the second undercut opening 201 to block the water vapor intrusion channel.

[0121] In some embodiments, with Figure 5 Similarly, in the embodiment shown, the anode layer 82 may include the anode 821 and the isolation structure 20. That is, the isolation structure 20 can be formed in the same process as the anode 821, thereby saving process steps and reducing process costs.

[0122] In some embodiments, since the isolation structure 20 is disposed on the second flat sub-layer 62, the pixel definition layer 70 corresponding to the isolation structure 20 is removed; then the pixel definition layer 70 also has a second opening 702 corresponding to the isolation structure 20, so that the organic functional layer 30 can extend into the second opening 702 and be blocked by the isolation structure 20; therefore, when the isolation structure 20 is disposed around the opening area 130, the second opening 702 is also disposed around the opening area 130, which can also block the water vapor intrusion channel in the pixel definition layer 70, further improving the water vapor blocking effect of the display panel, and improving the stability and service life of the display panel.

[0123] In another embodiment of this application, please refer to... Figure 1 , Figure 7 as well as Figure 10 The display panel further includes an opening area 130 adjacent to the display area 110, and the display panel has an opening 501 located in the opening area 130. The opening 501 can pass through a portion of the film layer in the display panel to improve the transmittance of the opening area 130. The opening area 130 can be used to place optical sensors, such as cameras and other devices.

[0124] In some embodiments, the aperture 501 may pass through the thin-film transistor layer 50, the planarization layer 60, the pixel definition layer 70, and the organic functional layer 30.

[0125] In this embodiment, the isolation structure 20 is arranged around the opening area 130, that is, the isolation structure 20 is arranged around the opening 501, which can isolate the part of the organic functional layer 30 that enters the display area 110 from the non-display area 120, thereby blocking the moisture intrusion channel of the organic functional layer 30, reducing the probability of device damage to the display panel due to moisture intrusion, and improving the stability of the display panel.

[0126] Specifically, in this embodiment, the organic layer 10 is reused as the planarization layer 60, and further, the organic layer 10 is reused as the first planarization sub-layer 61. The isolation structure 20 is disposed on the side of the first planarization sub-layer 61 away from the first interlayer medium layer 52. Thus, when the organic functional layer 30 extends from the opening area 130 to the isolation structure 20, it can be isolated at the first undercut opening 101 and / or the second undercut opening 201 to block the water vapor intrusion channel.

[0127] In some embodiments, with Figure 6 Similarly, in the embodiment shown, the conductive layer 81 may include the first adapter cable 811 and the isolation structure 20. That is, the isolation structure 20 can be formed in the same process as the first adapter cable 811, thereby saving process steps and reducing process costs.

[0128] In some embodiments, since the isolation structure 20 is disposed on the first flat sub-layer 61, the pixel definition layer 70 and the second flat sub-layer 62 corresponding to the isolation structure 20 are removed; then the pixel definition layer 70 also has a second opening 702 corresponding to the isolation structure 20, and the second flat sub-layer 62 forms a third opening 703 corresponding to the second opening 702, and the second opening 702 and the third opening 703 are connected; so that the organic functional layer 30 can extend into the second opening 702 and the third opening 703 and be blocked by the isolation structure 20; therefore, when the isolation structure 20 is disposed around the opening area 130, the second opening 702 and the third opening 703 are also disposed around the opening area 130, which can also block the water vapor intrusion channel in the pixel definition layer 70 and the second flat sub-layer 62, further improving the water vapor blocking effect of the display panel, and improving the stability and service life of the display panel.

[0129] In another embodiment of this application, please refer to... Figure 1 , Figure 11 as well as Figure 12 The display area 110 includes a plurality of pixel areas 1101, and the plurality of pixel areas 1101 are correspondingly disposed with a plurality of first openings 701 in the pixel definition layer 70; in this embodiment, the isolation structure 20 is located between adjacent pixel areas 1101.

[0130] Specifically, the isolation structure 20 can be arranged around each of the pixel areas 1101, that is, the isolation structure 20 is arranged around the first opening 701, thereby partially isolating the organic functional layer 30 from the pixel area 1101 into other pixel areas 1101, thereby isolating the leakage path, reducing the leakage current of the display panel, and improving the stability of the display panel; in addition, it can also isolate the moisture intrusion channel in the organic functional layer 30 from the pixel area 1101 into other pixel areas 1101, reducing the probability of device damage to the display panel due to moisture intrusion, and improving the stability of the display panel.

[0131] Specifically, in this embodiment, the organic layer 10 is reused as the pixel definition layer 70, and the isolation structure 20 is disposed on the side of the pixel definition layer 70 away from the planarization layer 60. When the organic functional layer 30 extends from the pixel area 1101 to the isolation structure 20, it can be isolated at the first undercut opening 101 and / or the second undercut opening 201, thereby isolating the leakage path, reducing the leakage current of the display panel, and improving the stability of the display panel; in addition, it can also isolate the moisture intrusion channel.

[0132] In another embodiment of this application, please refer to... Figure 1 , Figure 11 as well as Figure 13 The display area 110 includes a plurality of pixel areas 1101, and the plurality of pixel areas 1101 are correspondingly disposed with a plurality of first openings 701 in the pixel definition layer 70; in this embodiment, the isolation structure 20 is located between adjacent pixel areas 1101.

[0133] The isolation structure 20 can be arranged around each of the pixel areas 1101, that is, the isolation structure 20 is arranged around the first opening 701, thereby isolating the portion of the organic functional layer 30 that enters other pixel areas 1101 from the pixel area 1101, thereby isolating the leakage path, reducing the leakage current of the display panel, and improving the stability of the display panel; in addition, it can also isolate the moisture intrusion channel in the organic functional layer 30 from the pixel area 1101 to other pixel areas 1101, reducing the probability of device damage to the display panel due to moisture intrusion, and improving the stability of the display panel.

[0134] Specifically, in this embodiment, the organic layer 10 is reused as the planarization layer 60, and further, the organic layer 10 is reused as the second planarization sub-layer 62. The isolation structure 20 is disposed on the side of the second planarization sub-layer 62 away from the first planarization sub-layer 61. Thus, when the organic functional layer 30 extends from the pixel area 1101 to the isolation structure 20, it can be isolated at the first undercut opening 101 and / or the second undercut opening 201, thereby isolating the leakage path, reducing the leakage current of the display panel, and improving the stability of the display panel; in addition, it can also isolate the moisture intrusion channel.

[0135] In some embodiments, the anode layer 82 may include the anode 821 and the isolation structure 20, that is, the isolation structure 20 may be formed in the same process as the anode 821, thereby saving process steps and reducing process costs.

[0136] In some embodiments, since the isolation structure 20 is disposed on the second flat sub-layer 62, the pixel definition layer 70 corresponding to the isolation structure 20 is removed; then the pixel definition layer 70 also has a second opening 702 corresponding to the isolation structure 20, so that the organic functional layer 30 can extend into the second opening 702 and be blocked by the isolation structure 20; therefore, when the isolation structure 20 is disposed around the opening area 130, the second opening 702 is also disposed around the opening area 130, which can also block the water vapor intrusion channel in the pixel definition layer 70, further improving the water vapor blocking effect of the display panel, and improving the stability and service life of the display panel.

[0137] In one embodiment of this application, please refer to Figure 1 , Figure 11 as well as Figure 14 The display area 110 includes a plurality of pixel areas 1101, and the plurality of pixel areas 1101 are correspondingly disposed with a plurality of first openings 701 in the pixel definition layer 70; in this embodiment, the isolation structure 20 is located between adjacent pixel areas 1101.

[0138] The isolation structure 20 can be arranged around each of the pixel areas 1101, that is, the isolation structure 20 is arranged around the first opening 701, thereby isolating the portion of the organic functional layer 30 that enters other pixel areas 1101 from the pixel area 1101, thereby isolating the leakage path, reducing the leakage current of the display panel, and improving the stability of the display panel; in addition, it can also isolate the moisture intrusion channel in the organic functional layer 30 from the pixel area 1101 to other pixel areas 1101, reducing the probability of device damage to the display panel due to moisture intrusion, and improving the stability of the display panel.

[0139] Specifically, in this embodiment, the organic layer 10 is reused as the planarization layer 60, and further, the organic layer 10 is reused as the first planarization sub-layer 61. The isolation structure 20 is disposed on the side of the first planarization sub-layer 61 away from the second interlayer dielectric layer 53. Thus, when the organic functional layer 30 extends from the pixel area 1101 to the isolation structure 20, it can be isolated at the first undercut opening 101 and / or the second undercut opening 201, thereby isolating the leakage path, reducing the leakage current of the display panel, and improving the stability of the display panel; in addition, it can also isolate the moisture intrusion channel.

[0140] In some embodiments, the conductive layer 81 may include the first adapter cable 811 and the isolation structure 20, that is, the isolation structure 20 may be formed in the same process as the first adapter cable 811, thereby saving process steps and reducing process costs.

[0141] In some embodiments, since the isolation structure 20 is disposed on the first flat sub-layer 61, the pixel definition layer 70 and the second flat sub-layer 62 corresponding to the isolation structure 20 are removed; then the pixel definition layer 70 also has a second opening 702 corresponding to the isolation structure 20, and the second flat sub-layer 62 forms a third opening 703 corresponding to the second opening 702, and the second opening 702 and the third opening 703 are connected; so that the organic functional layer 30 can extend into the second opening 702 and the third opening 703 and be blocked by the isolation structure 20; therefore, when the isolation structure 20 is disposed around the pixel area 1101, the second opening 702 and the third opening 703 are also disposed around the pixel area 1101, which can also block the moisture intrusion channels in the pixel definition layer 70 and the second flat sub-layer 62, further improving the moisture blocking effect of the display panel, and improving the stability and service life of the display panel.

[0142] In another embodiment of this application, please refer to... Figure 1, Figure 15 as well as Figure 16 In this embodiment, the display panel further includes a cathode layer 83 disposed on the side of the organic functional layer 30 away from the pixel definition layer 70, and the cathode layer 83 is isolated at the isolation structure 20.

[0143] In this embodiment, the isolation structure 20 is not arranged in a closed manner around the pixel area 1101. The isolation structure 20 has a gap 203 formed on the path around the pixel area 1101. At the gap 203, the isolation structure 20 is not provided. As a result, the organic functional layer 30 and the cathode layer 83 are continuously arranged at the gap 203 to realize the full-area signal transmission of the cathode layer 83.

[0144] It should be noted that, in Figures 2 to 15 In the embodiments shown, the cathode layers 83 can all be continuously arranged, that is, only the organic functional layer 30 is interrupted at the isolation structure 20.

[0145] Furthermore, the isolation structure 20 can be configured as follows: Figures 2 to 15 At least one of the structures shown in the embodiments.

[0146] Continuing from the above, this embodiment of the application provides an isolation structure 20 on the organic layer 10. The isolation structure 20 can form a first undercut opening 101 with the organic layer 10, and a second undercut opening 201 can be formed in the isolation structure 20. Thus, the two undercut openings can cooperate to more effectively isolate the organic functional layer 30, which can avoid problems such as moisture intrusion or leakage, enhance the stability of the display panel, and improve the display effect of the display panel.

[0147] In addition, this application embodiment also provides a preparation process for the isolation structure 20 described in the above embodiments. Please refer to... Figure 1 , Figure 17 , Figure 18 as well as Figure 19 The fabrication process of the isolation structure 20 includes the following steps:

[0148] An organic material layer 1100 is formed.

[0149] An isolation material layer 200 is formed on the organic material layer 1100; wherein the isolation material layer 200 includes a first material layer 210, a second material layer 220, and a third material layer 230 stacked together, and the second material layer 220 is located between the first material layer 210 and the third material layer 230, and the first material layer 210 is located between the second material layer 220 and the organic material layer 1100, as shown below. Figure 17 As shown.

[0150] In some embodiments, the stack of the first material layer 210 / second material layer 220 / third material layer 230 can be Ti / Al / Ti, Mo / Al / Mo or ITO / Ag / ITO; that is, the etching rate of the second material layer 220 is greater than the etching rate of the first material layer 210, and the etching rate of the second material layer 220 is greater than the etching rate of the third material layer 230.

[0151] Then, the organic material layer 1100 is etched to reduce its thickness. The thinned portion is the main body 11, while the portion covered by the insulating material layer 200 is not etched, thus forming the protrusion 12. Therefore, the protrusion 12 is located between the insulating material layer 200 and the main body 11. The organic material layer 1100 is etched a portion below the insulating material layer 200 at its edge to form the first undercut opening 101. Figure 18 As shown.

[0152] Then, the isolation material layer 200 is etched. Since the etching rate of the second material layer 220 is greater than the etching rate of the first material layer 210 and the third material layer 230, the side of the isolation material layer 200 will be etched to form the second undercut opening 201; that is, the edge of the second material layer 220 is recessed relative to the edge of the first material layer 210 and the edge of the third material layer 230, thereby obtaining... Figure 19 The isolation structure 20 is shown.

[0153] Next, when the organic functional layer 30 is formed on the organic layer 10 and the isolation structure 20, the organic functional layer 30 will be isolated at the first undercut opening 101 and / or the second undercut opening 201 to avoid problems such as water vapor intrusion or leakage, thereby enhancing the stability of the display panel and improving the display effect of the display panel.

[0154] In addition, this application embodiment also provides a display device, which includes the display panel described in the above embodiments.

[0155] It is understood that since the display device has the same display panel as in the above embodiments, the display device has the same beneficial effects as the display panel, which will not be repeated here.

[0156] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0157] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0158] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0159] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display panel, characterized by, The display panel comprises: an organic layer; an isolation structure disposed on the organic layer; an organic functional layer disposed on the isolation structure and the organic layer; wherein the organic layer forms a first undercut opening at an edge of the isolation structure, a side of the isolation structure forms a second undercut opening, and the organic functional layer is interrupted at the first undercut opening and / or the second undercut opening; the display panel comprises a plurality of the isolation structures arranged at intervals, a groove between two adjacent isolation structures, and a filling portion between the two adjacent isolation structures, the filling portion fills the groove and protrudes from a surface of the isolation structure away from the organic layer, and the filling portion is in contact with the organic layer; the first undercut opening and the second undercut opening are located at least on a side of the isolation structure away from the filling portion.

2. The display panel of claim 1, wherein, The organic layer comprises a body portion and a protruding portion connected to a side of the body portion close to the isolation structure, and the isolation structure is disposed on a side of the protruding portion away from the body portion; the protruding portion comprises a first surface close to the isolation structure and a first side surface connected to the first surface, and at least part of the first side surface is recessed towards the center of the protruding portion relative to an edge of the isolation structure close to the protruding portion to form the first undercut opening.

3. The display panel of claim 2, wherein, The isolation structure comprises a second surface away from the protruding portion, a third surface close to the protruding portion, and a second side surface connected between the second surface and the third surface, and part of the second side surface is recessed towards the center of the isolation structure to form the second undercut opening.

4. The display panel of claim 3, wherein, The isolation structure comprises a first sub-layer, a second sub-layer, and a third sub-layer arranged in layers, and the second sub-layer is located between the first sub-layer and the third sub-layer; at the second side surface, an edge of the second sub-layer is recessed towards the center of the second sub-layer relative to edges of the first sub-layer and the third sub-layer to form the second undercut opening.

5. The display panel of claim 2, wherein, The organic functional layer comprises a first sub-portion located on a side of the isolation structure away from the protruding portion and a second sub-portion located on a side of the body portion close to the protruding portion, and the first sub-portion and the second sub-portion are arranged at intervals.

6. The display panel of claim 2, wherein, The organic functional layer comprises a first sub-portion located on a side of the isolation structure away from the protruding portion, a second sub-portion located on a side of the body portion close to the protruding portion, and a third sub-portion located in the second undercut opening, and the first sub-portion, the second sub-portion, and the third sub-portion are arranged at intervals.

7. The display panel of claim 2, wherein, The maximum depth of the first undercut opening in a direction from an edge of the protruding portion to the center of the protruding portion is greater than or equal to the maximum depth of the second undercut opening in a direction from an edge of the isolation structure to the center of the isolation structure.

8. The display panel of claim 1, wherein, The first undercut opening and the second undercut opening at least partially overlap in a thickness direction of the display panel.

9. The display panel of any one of claims 1 to 8, wherein, The organic functional layer comprises an organic light-emitting layer, and the display panel further comprises a display area and a non-display area adjacent to the display area, and the isolation structure is arranged in the display area and / or the non-display area.

10. The display panel of claim 9, wherein, The isolation structure is arranged around the display area.

11. The display panel of claim 9, wherein, The display panel further comprises an aperture area arranged adjacent to the display area, and the display panel is provided with an aperture in the aperture area, the aperture penetrating through part of the film layers in the display panel, and the isolation structure is arranged around the aperture area.

12. The display panel of claim 9, wherein, The display area comprises a plurality of pixel areas, and the isolation structure is arranged between adjacent pixel areas.

13. The display panel of claim 9, wherein, The display panel further comprises: a substrate; a thin film transistor layer arranged on the substrate; a planarization layer arranged on a side of the thin film transistor layer away from the substrate; a pixel definition layer arranged on a side of the planarization layer away from the thin film transistor layer; wherein the organic layer is multiplexed as the planarization layer or the pixel definition layer.

14. The display panel of claim 13, wherein, When the organic layer is the planarization layer, the display panel further comprises an anode layer arranged on the planarization layer, the anode layer comprising anodes arranged at intervals and the isolation structure, and the pixel definition layer is provided with a first opening corresponding to the anode and a second opening corresponding to the isolation structure. Alternatively, when the organic layer is the planarization layer, the planarization layer comprises a plurality of planarization sub-layers, and the display panel further comprises a conductive layer arranged between adjacent planarization sub-layers, the conductive layer comprising first transfer lines and the isolation structure.

15. The display panel of claim 13, wherein, When the organic layer is the pixel definition layer, the isolation structure is arranged on a side of the pixel definition layer away from the planarization layer.

16. The display panel of claim 9, wherein, The organic functional layer further comprises a light-emitting auxiliary layer arranged in a stack with the organic light-emitting layer, and the light-emitting auxiliary layer comprises at least one of an electron injection layer, an electron transport layer, a hole injection layer and a hole transport layer.

17. A display device comprising: The display device comprises the display panel according to any one of claims 1 to 16.

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