Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel and a preparation method thereof and a display device.The display panel comprises a substrate, an isolation structure and a light-emitting unit, the isolation structure is arranged on one side of the substrate, and an isolation opening for containing the light-emitting unit is defined by the isolation structure; the isolation opening comprises a first edge extending in the first direction and a second edge extending in the second direction, the length of the first edge is larger than that of the second edge, the light-emitting unit is located in the isolation opening and comprises a second electrode, and the second electrode is not in lap joint with the isolation structure of the first edge. The second electrode is in lap joint with the isolation structure of the second edge. According to the display panel, the second electrode is in lap joint with the short side wall of the isolation structure, the long side wall is not in lap joint with the second electrode, and the distance between the long side wall and the pixel opening is shortened, so that the pixel opening ratio is increased, the brightness of the display panel is improved, and the display performance of the display panel is improved.

Description

Display panel and its manufacturing method, display device Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diodes (LEDs) are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide range of applications, becoming the mainstream of display devices.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a display panel that can improve the pixel aperture ratio, thereby improving brightness and display performance.

[0005] To achieve the above objectives, this application provides a display panel comprising:

[0006] Substrate;

[0007] An isolation structure is disposed on one side of the substrate, the isolation structure enclosing an isolation opening, the isolation opening including a first edge extending along a first direction and a second edge extending along a second direction, the length of the first edge being greater than the length of the second edge, and the first direction intersecting the second direction;

[0008] The light-emitting unit is located on the same side of the substrate and within the isolation opening as the isolation structure. The light-emitting unit includes a second electrode. The second electrode does not overlap with the isolation structure at the first edge, but overlaps with the isolation structure at the second edge.

[0009] In one embodiment, the isolation structure includes a first support portion and a second support portion, the second support portion being located on the side of the first support portion away from the substrate, the first support portion and the second support portion forming the isolation opening, and the second electrode overlapping the first support portion;

[0010] Preferably, the area of ​​the orthographic projection of the first support portion onto the substrate is smaller than the area of ​​the orthographic projection of the second support portion onto the substrate, and the orthographic projection of the first support portion onto the substrate is located within the orthographic projection of the second support portion onto the substrate.

[0011] Preferably, the edge of the second support portion serves as the edge of the isolation opening.

[0012] In one embodiment, the first support portion includes a first sub-support portion and a second sub-support portion. The first sub-support portion is located between the second sub-support portion and the substrate. The orthographic projection area of ​​the first sub-support portion on the substrate is larger than the orthographic projection area of ​​the second sub-support portion on the substrate, and the orthographic projection of the second sub-support portion on the substrate is located within the orthographic projection of the first sub-support portion on the substrate. The second electrode overlaps with the first sub-support portion.

[0013] Preferably, the second electrode also overlaps with the second sub-support portion.

[0014] In one embodiment, the display panel further includes a pixel defining layer located between the substrate and the isolation structure, the pixel defining layer enclosing a pixel opening, the light-emitting unit being at least partially located within the pixel opening, the pixel opening being located within the isolation opening, and the second electrode covering the pixel opening.

[0015] In one embodiment, within the same isolation opening, the pixel opening includes a first side extending along the first direction and a second side extending along the second direction, the first side being adjacent to the first edge and the second side being adjacent to the second edge, the distance between the orthographic projection of the first side onto the substrate and the orthographic projection of the first edge onto the substrate being a first distance, and the distance between the orthographic projection of the second side onto the substrate and the orthographic projection of the second edge onto the substrate being a second distance, wherein the first distance is less than the second distance.

[0016] In one embodiment, the distance between the orthographic projection of the first side on the substrate and the orthographic projection of the edge of the second support portion corresponding to the first edge on the substrate is the first distance, and the distance between the orthographic projection of the second side on the substrate and the orthographic projection of the edge of the second support portion corresponding to the second edge on the substrate is the second distance, wherein the first distance is smaller than the second distance.

[0017] In one embodiment, the isolation opening further includes a third edge extending along the first direction and a fourth edge extending along the second direction, the third edge being disposed opposite to the first edge and the fourth edge being disposed opposite to the second edge, the first edge, the second edge, the third edge and the fourth edge being sequentially connected and enclosing to form the isolation opening.

[0018] In one embodiment, within the same isolation opening, the pixel opening further includes a third side extending along the first direction and a fourth side extending along the second direction, the third side being disposed opposite to the first side and the fourth side being disposed opposite to the second side, the first side, the second side, the third side and the fourth side being sequentially connected and enclosing to form the pixel opening;

[0019] Preferably, the third side is adjacent to the third edge, the fourth side is adjacent to the fourth edge, the distance between the orthographic projection of the third side on the substrate and the orthographic projection of the third edge on the substrate is the first distance, and the distance between the orthographic projection of the fourth side on the substrate and the orthographic projection of the fourth edge on the substrate is the second distance, wherein the first distance is smaller than the second distance.

[0020] In one embodiment, the light-emitting unit further includes a first electrode and a light-emitting functional layer, wherein the first electrode, the light-emitting functional layer and the second electrode are sequentially stacked along a direction away from the substrate, and the light-emitting functional layer and the second electrode are located within the isolation opening;

[0021] Preferably, the first direction and the second direction are perpendicular.

[0022] In one embodiment, the display panel further includes a first encapsulation layer that covers the second electrode, wherein the orthographic projection of the first encapsulation layer on the substrate overlaps with the orthographic projection of the isolation structure on the substrate.

[0023] In one embodiment, the display panel further includes:

[0024] The second encapsulation layer is disposed on the side of the first encapsulation layer away from the substrate;

[0025] A third encapsulation layer is disposed on the side of the second encapsulation layer away from the substrate.

[0026] In one embodiment, the isolation opening includes a first type of opening, a second type of opening, and a third type of opening, which are respectively used to accommodate light-emitting units with different emitted light colors.

[0027] Based on the same inventive concept, this application also discloses a method for manufacturing a display panel, which includes:

[0028] Provide substrate;

[0029] An isolation structure is formed on one side of a substrate; wherein the isolation structure encloses an isolation opening, the isolation opening including a first edge extending along a first direction and a second edge extending along a second direction, the length of the first edge being greater than the length of the second edge, and the first direction intersecting the second direction;

[0030] A second electrode is formed within the isolation opening. The second electrode does not overlap with the isolation structure at the first edge, but overlaps with the isolation structure at the second edge.

[0031] In one embodiment, forming an isolation structure on one side of the substrate includes:

[0032] A first support layer is formed on one side of the substrate;

[0033] A second support layer is formed on the side of the first support layer away from the substrate;

[0034] The second support layer is patterned to form the second support portion; the first support layer is patterned to form the first support portion, and the first support portion and the second support portion form the isolation structure.

[0035] In one embodiment, the process of forming an isolation structure on one side of the substrate further includes:

[0036] A pixel defining layer is formed on one side of the substrate;

[0037] After forming the isolation structure on one side of the substrate, and before forming the second electrode within the isolation opening, the method further includes:

[0038] The pixel defining layer is patterned to form a pixel opening, which is located within the isolation opening, and the second electrode covers the pixel opening.

[0039] In one embodiment, within the same isolation opening, the pixel opening includes a first side extending along the first direction and a second side extending along the second direction, the first side being adjacent to the first edge and the second side being adjacent to the second edge, the distance between the orthographic projection of the first side onto the substrate and the orthographic projection of the first edge onto the substrate being a first distance, and the distance between the orthographic projection of the second side onto the substrate and the orthographic projection of the second edge onto the substrate being a second distance, wherein the first distance is less than the second distance.

[0040] In one embodiment, before forming the pixel defining layer on one side of the substrate, the method further includes:

[0041] A first electrode is formed on one side of the substrate;

[0042] Preferably, before forming the second electrode within the isolation opening, the method further includes:

[0043] A light-emitting functional layer is formed within the isolation opening; wherein the first electrode, the light-emitting functional layer, and the second electrode are sequentially stacked along a direction away from the substrate, and the first electrode, the light-emitting functional layer, and the second electrode constitute a light-emitting unit.

[0044] In one embodiment, the method for manufacturing the display panel further includes:

[0045] A first encapsulation layer is formed on the side of the second electrode away from the substrate; wherein the orthographic projection of the first encapsulation layer on the substrate overlaps with the orthographic projection of the isolation structure on the substrate.

[0046] In one embodiment, the method for manufacturing the display panel further includes:

[0047] A second encapsulation layer is formed on the side of the first encapsulation layer away from the substrate;

[0048] A third encapsulation layer is formed on the side of the second encapsulation layer away from the substrate.

[0049] Based on the same inventive concept, this application also discloses a display device, which includes the above-described display panel.

[0050] Compared with the prior art, the display panel provided in this application has a second electrode that does not overlap with the isolation structure of the first edge, but overlaps with the isolation structure of the second edge. This achieves the second electrode to overlap with the shorter sidewall of the isolation structure, while the longer sidewall does not overlap with the second electrode. This is beneficial to shorten the distance between the longer sidewall and the pixel opening, thereby increasing the pixel aperture ratio, improving the brightness of the display panel, and improving the display performance of the display panel. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 is a schematic diagram of a related display panel;

[0053] Figure 2 is a schematic diagram of the hierarchical structure of a related display panel;

[0054] Figure 3 is a schematic diagram of a display panel provided in an embodiment of this application;

[0055] Figure 4 is a partial structural diagram of Figure 3;

[0056] Figure 5 is a cross-sectional view along AA in Figure 4;

[0057] Figure 6 is a cross-sectional view along BB in Figure 4;

[0058] Figure 7 is a projection diagram of a display panel provided in another embodiment of this application;

[0059] Figure 8 is a projection diagram of a display panel provided in another embodiment of this application;

[0060] Figure 9 is a schematic diagram of the hierarchical structure of a display panel provided in another embodiment of this application;

[0061] Figure 10 is a schematic diagram of the hierarchical structure of a display panel provided in another embodiment of this application;

[0062] Figure 11 is a schematic diagram of the hierarchical structure of a display panel provided in another embodiment of this application;

[0063] Figure 12 is a schematic diagram of the isolation structure of a display panel provided in another embodiment of this application;

[0064] Figure 13 is a flowchart of a method for preparing a display panel according to another embodiment of this application.

[0065] Marker explanation:

[0066] 100. Display panel;

[0067] 1. Substrate;

[0068] 2. Isolation structure; 21. Isolation opening; 211. First edge; 212. Second edge; 213. Third edge; 214. Fourth edge;

[0069] 3. Light-emitting unit; 31. First electrode; 32. Light-emitting functional layer; 33. Second electrode;

[0070] 4. First support section; 43. First sub-support section; 44. Second sub-support section;

[0071] 5. Second support section;

[0072] 6. Pixel boundary layer; 61. Pixel opening; 611. First side; 612. Second side; 613. Third side; 614. Fourth side;

[0073] 7. First encapsulation layer. Detailed Implementation

[0074] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0075] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0076] Referring to Figures 1-2, a schematic diagram of a related display panel is shown. The display panel 100 includes a substrate 1 and an isolation structure 2 disposed on one side of the substrate 1. The isolation structure 2 forms an isolation opening 21 for accommodating light-emitting units 3, and adjacent light-emitting units 3 are separated by the isolation structure 2.

[0077] In this process, by setting an isolation structure 2 at the gap between the light-emitting units 3, the functional film layers of adjacent light-emitting units 3 are separated. Thus, in the evaporation process of multiple functional film layers, it is only necessary to perform evaporation on the entire display panel, without using a mask to evaporate the area where the light-emitting units are located to form functional film layers. Therefore, the process of using the isolation structure 2 for evaporation does not need to consider the alignment accuracy problem during evaporation, thereby allowing the gap between the light-emitting units 3 to be designed to be smaller, so as to increase the pixel density.

[0078] Through long-term research, the inventors discovered that as the PPI (pixel density unit) of the display panel 100 with the above structure increases, the pixel aperture will decrease, which in turn leads to lower brightness of the display panel.

[0079] Based on this, this application provides a display panel solution, as detailed in the following embodiments.

[0080] Referring to Figures 3-7, an embodiment of this application discloses a display panel 100, which includes a substrate 1, an isolation structure 2, and a light-emitting unit 3.

[0081] An isolation structure 2 is disposed on one side of the substrate 1, and the isolation structure 2 encloses to form an isolation opening 21. The isolation opening 21 includes a first edge 211 extending along a first direction (Y direction in the figure) and a second edge 212 extending along a second direction (X direction in the figure). The length of the first edge 211 is greater than the length of the second edge 212, and the first direction intersects the second direction.

[0082] The light-emitting unit 3 and the isolation structure 2 are located on the same side of the substrate 1 and within the isolation opening 21. The light-emitting unit 3 includes a second electrode 33. The second electrode 33 does not overlap with the isolation structure 2 of the first edge 211, but overlaps with the isolation structure 2 of the second edge 212.

[0083] The first direction and the second direction can be at an angle of 70 degrees, 80 degrees, 85 degrees, etc. In one specific embodiment, the first direction and the second direction are perpendicular, that is, at a 90-degree angle.

[0084] In this embodiment, the second electrode 33 of the display panel 100 is not connected to the isolation structure 2 of the first edge 211, but is connected to the isolation structure 2 of the second edge 212. This achieves the connection between the second electrode 33 and the shorter sidewall of the isolation structure 2, while the longer sidewall is not connected to the second electrode 33. This helps to shorten the distance between the longer sidewall and the pixel opening 61, thereby increasing the pixel aperture ratio, improving the brightness of the display panel, and enhancing the display performance of the display panel.

[0085] The second electrode 33 is connected to the isolation structure 2, so that the isolation structure 2 connects the second electrodes 33 of different light-emitting units 3, thereby making the isolation structure 2 and the second electrodes 33 of the light-emitting units 3 form a common electrode for driving.

[0086] Referring to Figure 5, in one embodiment, the isolation structure 2 includes a first support portion 4 and a second support portion 5. The second support portion 5 is located on the side of the first support portion 4 away from the substrate 1. The first support portion 4 and the second support portion 5 together form an isolation opening 21, and the second electrode 33 overlaps with the first support portion 4. The second electrodes 33 in different light-emitting units 3 are connected through the first support portion 4.

[0087] Preferably, the area of ​​the first support portion 4 projected onto the substrate 1 is smaller than the area of ​​the second support portion 5 projected onto the substrate 1, and the projection of the first support portion 4 onto the substrate 1 is located within the projection of the second support portion 5 onto the substrate 1; thus, at least the portion of the isolation structure 2 away from the substrate 1 is configured to be wider at the top and narrower at the bottom, so that the isolation structure 2 can block the light-emitting functional layer 32 of the adjacent light-emitting unit 3, thereby reducing the current crosstalk problem of the adjacent light-emitting unit 3.

[0088] Referring to Figures 5 and 6, in one embodiment, the display panel further includes a pixel defining layer 6 located between the substrate 1 and the isolation structure 2. The pixel defining layer 6 encloses a pixel opening 61, and the light-emitting unit 3 is at least partially located within the pixel opening 61. The pixel opening 61 is located within the isolation opening 21, and the second electrode 33 covers the pixel opening 61. The pixel defining layer 6 defines the shape and position of the light-emitting unit 3 and isolates the first electrode 31 from the isolation structure 2, thereby allowing the first electrode 31 to have a larger design area without contacting the isolation structure 2, thus enabling the light-emitting unit 3 to have a larger effective light-emitting area.

[0089] Please continue to refer to Figures 5, 6, and 8. In one embodiment, within the same isolation opening 21, the pixel opening 61 includes a first side 611 extending along a first direction and a second side 612 extending along a second direction. The first side 611 is adjacent to the first edge 211, and the second side 612 is adjacent to the second edge 212. The distance between the orthographic projection of the first side 611 onto the substrate 1 and the orthographic projection of the first edge 211 onto the substrate 1 is a first distance E, and the distance between the orthographic projection of the second side 612 onto the substrate 1 and the orthographic projection of the second edge 212 onto the substrate 1 is a second distance F. The first distance E is less than the second distance F.

[0090] Specifically, since the second electrode 33 overlaps with the shorter second edge 212, while the longer first edge 211 does not overlap with the second electrode 33, the distance between the pixel opening 61 and the first edge 211 can be smaller, satisfying that the distance between the pixel opening 61 and the first edge 211 is less than the distance between the pixel opening 61 and the second edge 212.

[0091] In one embodiment, the edge of the second support portion 5 serves as the edge of the isolation opening 21. The distance between the orthographic projection of the first side 611 on the substrate 1 and the orthographic projection of the edge of the second support portion 5 corresponding to the first edge 211 on the substrate 1 is the first distance E. The distance between the orthographic projection of the second side 612 on the substrate 1 and the orthographic projection of the edge of the second support portion 5 corresponding to the second edge 212 on the substrate 1 is the second distance F. The first distance E is smaller than the second distance F.

[0092] Referring to Figure 7, in one embodiment, the isolation opening 21 further includes a third edge 213 extending along a first direction and a fourth edge 214 extending along a second direction. The third edge 213 is disposed opposite to the first edge 211, and the fourth edge 214 is disposed opposite to the second edge 212. The first edge 211, the second edge 212, the third edge 213, and the fourth edge 214 are sequentially connected and enclosed to form the isolation opening 21. That is, the isolation opening 21 is rectangular in shape, which facilitates a more compact arrangement of the isolation openings 21 to improve the pixel aperture ratio.

[0093] Referring to Figure 8, in one embodiment, within the same isolation opening 21, the pixel opening 61 further includes a third side 613 extending along a first direction and a fourth side 614 extending along a second direction. The third side 613 is disposed opposite to the first side 611, and the fourth side 614 is disposed opposite to the second side 612. The first side 611, the second side 612, the third side 613, and the fourth side 614 are sequentially connected and enclosed to form the pixel opening 61. That is, the pixel opening 61 is rectangular in shape, which facilitates a more compact arrangement of the pixel openings 61 to improve the pixel aperture ratio.

[0094] Preferably, the third side 613 is adjacent to the third edge 213, and the fourth side 614 is adjacent to the fourth edge 214. The distance between the orthographic projection of the third side 613 on the substrate 1 and the orthographic projection of the third edge 213 on the substrate 1 is the first distance E, and the distance between the orthographic projection of the fourth side 614 on the substrate 1 and the orthographic projection of the fourth edge 214 on the substrate 1 is the second distance F. The first distance E is smaller than the second distance F.

[0095] Referring to Figure 5, in one embodiment, the light-emitting unit 3 further includes a first electrode 31 and a light-emitting functional layer. The first electrode 31, the light-emitting functional layer 32, and the second electrode 33 are sequentially stacked along a direction away from the substrate 1, and the light-emitting functional layer 32 and the second electrode 33 are located within the isolation opening 21. By configuring different voltages on the first electrode 31 and the second electrode 33, a voltage difference is formed between the first electrode 31 and the second electrode 33, driving the light-emitting functional layer 32 to emit light. Optionally, the first electrode 31 is an anode, and the second electrode 33 is a cathode.

[0096] Referring to Figures 9 and 10, in one embodiment, the display panel 100 further includes a first encapsulation layer 7, which covers the second electrode 33. The orthographic projection of the first encapsulation layer 7 on the substrate 1 overlaps with the orthographic projection of the isolation structure 2 on the substrate 1, and is used to protect the light-emitting unit 3.

[0097] In one embodiment, the display panel 100 further includes a second encapsulation layer and a third encapsulation layer. The second encapsulation layer is disposed on the side of the first encapsulation layer 7 away from the substrate 1, and the third encapsulation layer is disposed on the side of the second encapsulation layer away from the substrate 1. The first and third encapsulation layers are inorganic layers, with high density to isolate water and oxygen. The second encapsulation layer is an organic layer, thus having a larger thickness to planarize the surface of the display panel, achieving an inorganic-organic-inorganic three-layer encapsulation.

[0098] Referring to Figures 11 and 12, in one embodiment, the first support portion 4 includes a first sub-support portion 43 and a second sub-support portion 44. The first sub-support portion 43 is located between the second sub-support portion 44 and the substrate 1. The orthographic projection area of ​​the first sub-support portion 43 on the substrate 1 is larger than the orthographic projection area of ​​the second sub-support portion 44 on the substrate 1, and the orthographic projection of the second sub-support portion 44 on the substrate 1 is located within the orthographic projection of the first sub-support portion 43 on the substrate 1. The second electrode 33 overlaps with the first sub-support portion 43, which helps to ensure the stability of the electrical connection between the second electrode and the first support portion 4.

[0099] Preferably, the second electrode 33 also overlaps with the second sub-support 44, which helps to increase the overlap area and further improve the overlap effect. Furthermore, the material of the second sub-support 44 includes aluminum, the material of the first sub-support 43 includes molybdenum, and the material of the second support 5 includes titanium.

[0100] In one embodiment, the isolation opening 21 includes a first type of opening, a second type of opening, and a third type of opening. These openings are respectively used to accommodate light-emitting units 3 with different emitted light colors, enhancing the richness of the display on the display panel 100. For example, the light-emitting units 3 of different colors include light-emitting unit R, light-emitting unit B, and light-emitting unit G. Furthermore, the first type of opening, the second type of opening, and the third type of opening can be configured as needed, and their sizes may differ; no specific limitation is imposed.

[0101] Based on the same inventive concept, and referring to FIG13, another embodiment of this application discloses a method for manufacturing a display panel, which includes the following steps:

[0102] Step S10: Provide substrate 1;

[0103] Step S20: An isolation structure 2 is formed on one side of the substrate 1; wherein the isolation structure 2 encloses an isolation opening 21, the isolation opening 21 includes a first edge 211 extending along a first direction and a second edge 212 extending along a second direction, the length of the first edge 211 is greater than the length of the second edge 212, and the first direction intersects the second direction.

[0104] Step S30: A second electrode 33 is formed in the isolation opening 21. The second electrode 33 does not overlap with the isolation structure 2 of the first edge 211, but overlaps with the isolation structure 2 of the second edge 212; see Figure 3-7.

[0105] In the display panel 100 prepared by the method provided in this embodiment, the second electrode 33 does not overlap with the isolation structure 2 of the first edge 211, but overlaps with the isolation structure 2 of the second edge 212. This achieves the overlap of the second electrode 33 with the shorter sidewall of the isolation structure 2, while the longer sidewall does not overlap with the second electrode 33. This helps to shorten the distance between the longer sidewall and the pixel opening 61, thereby increasing the pixel aperture ratio, improving the brightness of the display panel, and enhancing the display performance of the display panel.

[0106] Referring to Figures 5 and 6, in one embodiment, step S20, forming an isolation structure 2 on one side of the substrate 1, includes:

[0107] A first support layer is formed on one side of substrate 1;

[0108] A second support layer is formed on the side of the first support layer away from the substrate 1;

[0109] The second support layer is graphically represented to form the second support part 5; the first support layer is graphically represented to form the first support part 4, and the first support part 4 and the second support part 5 form the isolation structure 2.

[0110] The second electrode 33 overlaps with the first support part 4, and the second electrodes 33 in different light-emitting units 3 are connected through the first support part 4.

[0111] Preferably, the area of ​​the first support portion 4 projected onto the substrate 1 is smaller than the area of ​​the second support portion 5 projected onto the substrate 1, and the projection of the first support portion 4 onto the substrate 1 is located within the projection of the second support portion 5 onto the substrate 1; thus, at least the portion of the isolation structure 2 away from the substrate 1 is configured to be wider at the top and narrower at the bottom, so that the isolation structure 2 can block the light-emitting functional layer 32 of the adjacent light-emitting unit 3, thereby reducing the current crosstalk problem of the adjacent light-emitting unit 3.

[0112] In one embodiment, before step S10, forming the isolation structure 2 on one side of the liner / 1, the following step is further included:

[0113] A pixel defining layer 6 is formed on one side of the substrate 1;

[0114] After step S20, when the isolation structure 2 is formed on one side of the substrate 1, and before step S30, when the second electrode 33 is formed in the isolation opening 21, the following steps are also included:

[0115] The pixel defining layer 6 is patterned to form a pixel opening 61, which is located within the isolation opening 21. The second electrode 33 covers the pixel opening 61. The pixel defining layer 6 determines the shape and position of the light-emitting unit 3 and isolates the first electrode 31 from the isolation structure 2. This allows the first electrode 31 to have a larger design area without contacting the isolation structure 2, thus enabling the light-emitting unit 3 to have a larger effective light-emitting area.

[0116] Referring to Figures 5, 6, and 8, in one embodiment, within the same isolation opening 21, the pixel opening 61 includes a first side 611 extending along a first direction and a second side 612 extending along a second direction. The first side 611 is adjacent to the first edge 211, and the second side 612 is adjacent to the second edge 212. The distance between the orthographic projection of the first side 611 onto the substrate 1 and the orthographic projection of the first edge 211 onto the substrate 1 is a first distance E, and the distance between the orthographic projection of the second side 612 onto the substrate 1 and the orthographic projection of the second edge 212 onto the substrate 1 is a second distance F. The first distance E is less than the second distance F.

[0117] Specifically, since the second electrode 33 overlaps with the shorter second edge 212, while the longer first edge 211 does not overlap with the second electrode 33, the distance between the pixel opening 61 and the first edge 211 can be smaller, satisfying that the distance between the pixel opening 61 and the first edge 211 is less than the distance between the pixel opening 61 and the second edge 212.

[0118] In one embodiment, before forming the pixel defining layer 6 on one side of the substrate 1, the following step is further included:

[0119] A first electrode 31 is formed on one side of the substrate 1.

[0120] Preferably, before forming the second electrode 33 within the isolation opening 21, the method further includes:

[0121] A light-emitting functional layer 32 is formed within the isolation opening 21. A first electrode 31, the light-emitting functional layer 32, and a second electrode 33 are sequentially stacked along a direction away from the substrate 1, forming a light-emitting unit 3. (See Figure 5.) By applying different voltages to the first electrode 31 and the second electrode 33, a voltage difference is created between them, driving the light-emitting functional layer 32 to emit light. Optionally, the first electrode 31 is the anode, and the second electrode 33 is the cathode.

[0122] In one embodiment, the method for manufacturing the display panel further includes the following steps:

[0123] A first encapsulation layer 7 is formed on the side of the second electrode 22 away from the substrate 1; as shown in Figures 9 and 10, the orthographic projection of the first encapsulation layer 7 on the substrate 1 overlaps with the orthographic projection of the isolation structure 2 on the substrate 1. The first encapsulation layer 7 is used to protect the light-emitting unit 3 and the isolation structure 2.

[0124] In one embodiment, the method for manufacturing the display panel further includes the following steps:

[0125] A second encapsulation layer is formed on the side of the first encapsulation layer 7 away from the substrate 1;

[0126] A third encapsulation layer is formed on the side of the second encapsulation layer away from the substrate 1.

[0127] Among them, the first encapsulation layer 7 and the third encapsulation layer are inorganic layers. The inorganic layers are highly dense to isolate water and oxygen. The second encapsulation layer is an organic layer, which has a large thickness to flatten the surface of the display panel, thus realizing an inorganic-organic-inorganic three-layer encapsulation.

[0128] The specific structure, materials, and mechanisms of the display panel 100 prepared in the method of preparing the display panel in this embodiment can be referred to the above-described display panel embodiment, and will not be repeated here.

[0129] Another embodiment of this application discloses a display device, which includes the display panel 100 in the above embodiment. The display device can be used on smart devices (such as mobile phones, VR devices, computers, televisions, vehicle displays, etc.).

[0130] In this embodiment, the display panel 100 provided by the display device has a second electrode 33 that does not overlap with the isolation structure 2 of the first edge 211, but overlaps with the isolation structure 2 of the second edge 212. This achieves the overlap of the second electrode 33 with the shorter sidewall of the isolation structure 2, while the longer sidewall does not overlap with the second electrode 33. This helps to shorten the distance between the longer sidewall and the pixel opening 61, thereby increasing the pixel aperture ratio, improving the brightness of the display panel, and improving the display performance of the display device.

[0131] Patent applications CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, PCT / CN2024 / 099072, CN117979755A, CN11799 CN1900A, CN117062489A, CN117580403A, CN116583155A, CN116669477A, ​​CN117396039A, CN116669480A, CN116600606A, and CN117500332A describe relevant technical solutions for the isolation structure 2, the contents of which are incorporated herein by reference.

[0132] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0133] It should be noted that the above description describes some embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0134] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized in that, include: Substrate; An isolation structure is disposed on one side of the substrate, the isolation structure enclosing an isolation opening, the isolation opening including a first edge extending along a first direction and a second edge extending along a second direction, the length of the first edge being greater than the length of the second edge, and the first direction intersecting the second direction; The light-emitting unit is located on the same side of the substrate and within the isolation opening as the isolation structure. The light-emitting unit includes a second electrode. The second electrode does not overlap with the isolation structure at the first edge, but overlaps with the isolation structure at the second edge.

2. The display panel as described in claim 1, characterized in that, The isolation structure includes a first support portion and a second support portion, the second support portion being located on the side of the first support portion away from the substrate, the first support portion and the second support portion forming the isolation opening, and the second electrode overlapping the first support portion; preferably, the area of ​​the orthographic projection of the first support portion on the substrate is smaller than the area of ​​the orthographic projection of the second support portion on the substrate, and the orthographic projection of the first support portion on the substrate is located within the orthographic projection of the second support portion on the substrate; preferably, the edge of the second support portion serves as the edge of the isolation opening.

3. The display panel as described in claim 2, characterized in that, The first support portion includes a first sub-support portion and a second sub-support portion. The first sub-support portion is located between the second sub-support portion and the substrate. The orthographic projection area of ​​the first sub-support portion on the substrate is larger than the orthographic projection area of ​​the second sub-support portion on the substrate, and the orthographic projection of the second sub-support portion on the substrate is located within the orthographic projection of the first sub-support portion on the substrate. The second electrode overlaps with the first sub-support portion. Preferably, the second electrode also overlaps with the second sub-support portion.

4. The display panel as described in claim 2, characterized in that, The display panel further includes a pixel defining layer located between the substrate and the isolation structure. The pixel defining layer encloses a pixel opening, and the light-emitting unit is at least partially located within the pixel opening. The pixel opening is located within the isolation opening, and the second electrode covers the pixel opening.

5. The display panel as described in claim 4, characterized in that, In the same isolation opening, the pixel opening includes a first side extending along the first direction and a second side extending along the second direction. The first side is adjacent to the first edge, and the second side is adjacent to the second edge. The distance between the orthographic projection of the first side on the substrate and the orthographic projection of the first edge on the substrate is a first distance, and the distance between the orthographic projection of the second side on the substrate and the orthographic projection of the second edge on the substrate is a second distance. The first distance is smaller than the second distance.

6. The display panel as described in claim 5, characterized in that, The distance between the orthographic projection of the first side on the substrate and the orthographic projection of the edge of the second support portion corresponding to the first edge on the substrate is the first distance, and the distance between the orthographic projection of the second side on the substrate and the orthographic projection of the edge of the second support portion corresponding to the second edge on the substrate is the second distance, wherein the first distance is less than the second distance.

7. The display panel as described in claim 5, characterized in that, In the same isolation opening, the isolation opening further includes a third edge extending along the first direction and a fourth edge extending along the second direction. The third edge is disposed opposite to the first edge, and the fourth edge is disposed opposite to the second edge. The first edge, the second edge, the third edge and the fourth edge are sequentially connected and enclosed to form the isolation opening.

8. The display panel as described in claim 7, characterized in that, In the same isolation opening, the pixel opening further includes a third side extending along the first direction and a fourth side extending along the second direction. The third side is disposed opposite to the first side, and the fourth side is disposed opposite to the second side. The first side, the second side, the third side, and the fourth side are sequentially connected and enclosed to form the pixel opening. Preferably, the third side is adjacent to the third edge, and the fourth side is adjacent to the fourth edge. The distance between the orthographic projection of the third side on the substrate and the orthographic projection of the third edge on the substrate is the first distance, and the distance between the orthographic projection of the fourth side on the substrate and the orthographic projection of the fourth edge on the substrate is the second distance. The first distance is smaller than the second distance.

9. The display panel as claimed in claim 1, characterized in that, The light-emitting unit further includes a first electrode and a light-emitting functional layer. The first electrode, the light-emitting functional layer, and the second electrode are stacked sequentially along a direction away from the substrate. The light-emitting functional layer and the second electrode are located within the isolation opening. Preferably, the first direction and the second direction are perpendicular.

10. The display panel as claimed in claim 1, characterized in that, The display panel further includes a first encapsulation layer that covers the second electrode, wherein the orthographic projection of the first encapsulation layer on the substrate overlaps with the orthographic projection of the isolation structure on the substrate.

11. The display panel as claimed in claim 10, characterized in that, The display panel further includes: a second encapsulation layer disposed on the side of the first encapsulation layer away from the substrate; and a third encapsulation layer disposed on the side of the second encapsulation layer away from the substrate.

12. The display panel as claimed in claim 1, characterized in that, The isolation opening includes a first type of opening, a second type of opening, and a third type of opening, which are used to accommodate light-emitting units with different emitted light colors.

13. A method for manufacturing a display panel, characterized in that, include: A substrate is provided; an isolation structure is formed on one side of the substrate; wherein the isolation structure encloses an isolation opening, the isolation opening including a first edge extending along a first direction and a second edge extending along a second direction, the length of the first edge being greater than the length of the second edge, and the first direction intersecting the second direction; A second electrode is formed within the isolation opening. The second electrode does not overlap with the isolation structure at the first edge, but overlaps with the isolation structure at the second edge.

14. The method for manufacturing a display panel as described in claim 13, characterized in that, The method of forming an isolation structure on one side of a substrate includes: forming a first support layer on one side of the substrate; forming a second support layer on the side of the first support layer away from the substrate; patterning the second support layer to form a second support portion; and patterning the first support layer to form a first support portion, wherein the first support portion and the second support portion form the isolation structure.

15. The method for manufacturing a display panel as described in claim 13, characterized in that, Before forming an isolation structure on one side of the substrate, the method further includes: forming a pixel defining layer on one side of the substrate; after forming the isolation structure on one side of the substrate and before forming a second electrode in the isolation opening, the method further includes: patterning the pixel defining layer to form a pixel opening, the pixel opening being located in the isolation opening, and the second electrode covering the pixel opening.

16. The method for manufacturing a display panel as described in claim 15, characterized in that, In the same isolation opening, the pixel opening includes a first side extending along the first direction and a second side extending along the second direction. The first side is adjacent to the first edge, and the second side is adjacent to the second edge. The distance between the orthographic projection of the first side on the substrate and the orthographic projection of the first edge on the substrate is a first distance, and the distance between the orthographic projection of the second side on the substrate and the orthographic projection of the second edge on the substrate is a second distance. The first distance is smaller than the second distance.

17. The method for manufacturing a display panel as described in claim 14, characterized in that, Before forming a pixel defining layer on one side of the substrate, the method further includes: forming a first electrode on one side of the substrate; preferably, before forming a second electrode in the isolation opening, the method further includes: forming a light-emitting functional layer in the isolation opening; wherein the first electrode, the light-emitting functional layer and the second electrode are sequentially stacked along a direction away from the substrate, and the first electrode, the light-emitting functional layer and the second electrode constitute a light-emitting unit.

18. The method for manufacturing a display panel as described in claim 13, characterized in that, The method for manufacturing the display panel further includes: forming a first encapsulation layer on the side of the second electrode away from the substrate; wherein the orthographic projection of the first encapsulation layer on the substrate overlaps with the orthographic projection of the isolation structure on the substrate.

19. The method for manufacturing a display panel as described in claim 18, characterized in that, The method for manufacturing the display panel further includes: forming a second encapsulation layer on the side of the first encapsulation layer away from the substrate; and forming a third encapsulation layer on the side of the second encapsulation layer away from the substrate.

20. A display device, characterized in that, The display device includes a display panel as described in any one of claims 1-12.

Images