Display panel, preparation method thereof and display device

Abstract

Embodiments of the present application provide a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, a first electrode layer disposed on one side of the substrate and comprising a plurality of first electrodes distributed at intervals, a pixel definition layer disposed on one side of the substrate and comprising a pixel limiting portion and a pixel opening, the pixel limiting portion having a top surface facing away from the substrate and a plurality of grooves recessed from the top surface towards the substrate, the grooves having opposite first sidewalls and second sidewalls, the first sidewalls being closer to the corresponding pixel openings than the second sidewalls, and a light-emitting structure layer comprising a light-emitting unit located at least partially in the pixel opening. The first electrode comprises a first conductive sublayer, the first conductive sublayer covering the sidewalls and part of the top surface of the pixel limiting portion facing the pixel opening, and the first conductive sublayer comprising a first end portion cut off at the first sidewall. The present application can improve the process performance of the display panel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display device, and particularly relates to a display panel, a preparation method thereof and a display device. BACKGROUND

[0002] Organic Light Emitting Diode (OLED) display technology is considered as the most potential new display technology in the next generation. Compared with liquid crystal display technology, OLED display technology has the advantages of low energy consumption, low cost, self-luminous, wide viewing angle and fast response speed.

[0003] In the preparation process of a traditional OLED display panel, a fine metal mask (FMM) is usually used to realize patterning of a light-emitting pixel. The FMM technology is mature and has rich mass production experience. However, the FMM technology also has the problems of limited precision and high cost. The fine metal mask-free technology eliminates the limitations of the traditional OLED process on the size, resolution and other performance of the display screen, and has the advantages of high performance, full-size and agile delivery. The patents CN118251982A, CN116648095A, CN117062489A, CN118742138A, CN118678783A, CN118660598A, CN118675450A, CN118824188A and CN118781966A disclose the related content of the fine metal mask-free technology, for reference.

[0004] However, the process performance of the previous OLED display product needs to be improved. SUMMARY

[0005] Embodiments of the present application provide a display panel, a preparation method thereof and a display device, which aim to improve the process performance of the display panel.

[0006] Embodiments of the first aspect of the present application provide a display panel, comprising: a substrate; a first electrode layer disposed on one side of the substrate and comprising a plurality of first electrodes distributed at intervals; a pixel definition layer disposed on one side of the substrate and comprising a pixel limiting portion and a pixel opening, a plurality of the pixel openings are arrayed, and the pixel opening and the first electrode in the orthographic projection of the substrate at least partially overlap; and a light-emitting structure layer comprising a light-emitting unit located at least partially in the pixel opening, the pixel limiting portion has a top surface facing away from the substrate and a plurality of grooves recessed from the top surface towards the substrate, the grooves are arranged around a portion of the corresponding pixel opening and have opposite first and second side walls, and the first side wall is closer to the corresponding pixel opening than the second side wall; wherein the first electrode comprises a first conductive sublayer covering the side wall of the pixel limiting portion facing the pixel opening and part of the top surface, and the first conductive sublayer comprises a first end portion cut off at the first side wall.

[0007] According to the embodiments of the first aspect of the present application, further comprising: an isolation structure disposed on one side of the substrate and enclosing a plurality of isolated openings, the isolated opening is in communication with the corresponding pixel opening, and the light-emitting unit is located in the corresponding isolated opening; and a second electrode layer comprising a second electrode located on the side of the light-emitting unit facing away from the substrate, wherein the grooves form a connecting area between the two ends of the pixel opening, and the second electrode extends through the connecting area and connects the isolation structure.

[0008] According to any one of the preceding embodiments of the first aspect of the present application, the isolation structure comprises a first sublayer and a second sublayer stacked in a direction away from the substrate, the second sublayer is protrudingly arranged towards the isolated opening relative to the first sublayer, and the grooves in the orthographic projection of the substrate are located outside the orthographic projection of the second sublayer on the substrate.

[0009] And / or, the isolation structure comprises a third sublayer, a first sublayer and a second sublayer stacked in a direction away from the substrate, the third sublayer is protrudingly arranged towards the isolated opening relative to the first sublayer, and the grooves in the orthographic projection of the substrate are located outside the orthographic projection of the third sublayer on the substrate.

[0010] According to any one of the preceding embodiments of the first aspect of the present application, the grooves comprise a first subsegment located on at least one side of the pixel opening in a first direction and extending in a second direction, and the first direction and the second direction intersect.

[0011] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes a redundant portion, the first conductive sublayer and the redundant portion are spaced apart by the groove, the redundant portion is located on the side of the groove facing the isolation structure, and the minimum distance between the orthographic projection of the redundant portion on the substrate and the orthographic projection of the isolation structure on the substrate is a first distance;

[0012] In the connection region, the minimum distance between the orthographic projection of the first conductive layer on the substrate and the orthographic projection of the isolation structure on the substrate is the second distance, which is equal to the first distance.

[0013] According to any of the foregoing embodiments of the first aspect of this application, on the side where the groove is located, the light-emitting unit covers the first conductive layer, and the edge of the second electrode is recessed toward the pixel opening relative to the edge of the light-emitting unit;

[0014] And / or, on the side where the connection area is located, the light-emitting unit covers the edge of the first conductive layer, and the edge of the second electrode protrudes toward the isolation opening relative to the edge of the light-emitting unit and is connected to the isolation structure.

[0015] According to any of the foregoing embodiments of the first aspect of this application, the plurality of light-emitting units include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit with different light-emitting colors, wherein at least two of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit correspond to different thicknesses of the first conductive electronic layer.

[0016] According to any of the foregoing embodiments of the first aspect of this application, the pixel defining portion includes a first defining portion and a second defining portion sequentially stacked in a direction away from the substrate, and the groove extends at least from the top surface to the second defining portion.

[0017] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the first defining portion is greater than the thickness of the second defining portion.

[0018] According to any of the foregoing embodiments of the first aspect of this application, the groove extends from the top surface through the first defining portion to the second defining portion, and the groove includes: a first groove segment formed by recessing the surface of the first defining portion away from the substrate toward the substrate; and a second groove segment disposed through the second defining portion, wherein the first groove segment and the second groove segment are interconnected.

[0019] According to any of the foregoing embodiments of the first aspect of this application, the materials of the first defining portion and the second defining portion are different, and the orthographic projection of the second groove segment on the substrate is located within the orthographic projection of the first groove segment on the substrate.

[0020] According to any of the foregoing embodiments of the first aspect of this application, the orthographic projection of the second groove segment on the substrate is smaller than the orthographic projection area of ​​the first groove segment on the substrate.

[0021] According to any of the foregoing embodiments of the first aspect of this application, the first defining portion includes a first side surface facing the first groove segment, and the second defining portion includes a second side surface facing the second groove segment, with at least a portion of the second side surface protruding from the first side surface toward the second groove segment.

[0022] According to any of the foregoing embodiments of the first aspect of this application, the pixel defining portion has a bottom surface facing the substrate, the first defining portion includes a first sub-surface facing the pixel opening, the first sub-surface being located on the side of the first groove segment facing the substrate; the first defining portion has a first side surface facing the first groove segment, wherein the first sub-surface and the bottom surface are connected to each other and a first included angle is formed between the first sub-surface and the bottom surface, a second included angle is formed between the extension surface of the first side surface and the extension surface of the bottom surface, and the first included angle is greater than the second included angle.

[0023] According to any of the foregoing embodiments of the first aspect of this application, the second defining portion includes a second side surface facing the second groove segment, and a third included angle is formed between the extension surface of the second side surface and the extension surface of the bottom surface, wherein the first included angle is greater than the third included angle.

[0024] According to any of the foregoing embodiments of the first aspect of this application, the second included angle and the third included angle are equal.

[0025] According to any of the foregoing embodiments of the first aspect of this application, the first defining portion further includes a second sub-surface connected to the side of the first sub-surface facing away from the substrate, wherein a fourth included angle is formed between the extended surface of the second sub-surface and the bottom surface, and the first included angle is greater than the fourth included angle.

[0026] According to any of the foregoing embodiments of the first aspect of this application, the side surface of the first defining portion facing the pixel opening protrudes relative to the side surface of the second defining portion facing the pixel opening, the second defining portion facing the pixel opening has a third sub-surface, and a fifth included angle is formed between the extension surface of the third sub-surface and the bottom surface, the first included angle being greater than the fifth included angle.

[0027] According to any of the foregoing embodiments of the first aspect of this application, the fifth included angle and the third included angle are equal.

[0028] According to any of the foregoing embodiments of the first aspect of this application, the first electrode further includes a second conductive layer located on the side of the first conductive layer facing the substrate, a portion of the second conductive layer being in contact with the first conductive layer, and another portion of the second conductive layer being located between the pixel defining portion and the substrate, wherein the material of the first conductive layer comprises, and the material of the second conductive layer comprises.

[0029] According to any of the foregoing embodiments of the first aspect of this application, the first electrode further includes a third conductive layer located on the side of the second conductive layer facing the substrate, wherein the orthographic projection of the third conductive layer on the substrate and the orthographic projection of the second conductive layer on the substrate overlap, and the material of the third conductive layer includes.

[0030] According to any of the foregoing embodiments of the first aspect of this application, a protective portion is provided between the second conductive sublayer and the pixel defining portion, and the protective portion is provided around the pixel opening.

[0031] According to any of the foregoing embodiments of the first aspect of this application, the protective portion is disposed flush with the edge of the pixel opening and the edge of the second conductive layer, and the material of the protective portion includes...

[0032] The second aspect of this application also provides a method for manufacturing a display panel, comprising:

[0033] A second conductive material layer is disposed on one side of the substrate, and the second conductive material layer is patterned to form multiple spaced second conductive sublayers.

[0034] A pixel definition material layer is disposed on the side of the second conductive electronic layer away from the substrate, and the pixel definition material layer is patterned to form a pixel definition layer. The pixel definition layer includes a pixel defining portion and a pixel opening. A plurality of pixel openings are distributed in an array. The pixel defining portion has a top surface away from the substrate and a plurality of grooves recessed from the top surface into the substrate. The grooves are disposed around the corresponding portion of the pixel opening and have opposing first sidewalls and second sidewalls. The first sidewall is closer to the corresponding pixel opening than the second sidewall.

[0035] A first conductive material layer is disposed on the side of the pixel definition layer away from the substrate, and the first conductive material layer is patterned to form a first conductive sublayer. The first conductive sublayer and the second conductive sublayer are combined to form a first electrode. The first conductive sublayer covers the sidewall of the pixel definition portion facing the pixel opening and part of the top surface. The first conductive sublayer includes a first end that is cut off from the first sidewall.

[0036] According to an embodiment of the second aspect of this application, the step of forming a pixel definition layer by patterning the pixel definition material layer on the side of the second conductive layer away from the substrate includes:

[0037] A first material layer and a second material layer are sequentially disposed on the side of the second conductive layer away from the substrate;

[0038] The second material layer is patterned to form a through-hole second groove and a second sub-opening;

[0039] The first material layer is patterned at a first longitudinal etching rate via the second groove segment and the second sub-opening to form a first groove segment and a first recess, wherein the first groove segment and the first groove segment are interconnected to form the groove.

[0040] A covering portion is provided within the first and second slot sections;

[0041] The first material layer is patterned at a second longitudinal etching rate through the second sub-aperture and the first recess to form a first sub-aperture that penetrates the first material layer. The first sub-aperture and the second sub-aperture are interconnected to form the pixel opening. The second longitudinal etching rate is greater than the first longitudinal etching rate.

[0042] In any of the foregoing embodiments of the second aspect of this application, the step of patterning the second material layer to form a through second groove segment and a second sub-opening includes: patterning the second material layer with a first lateral etching amount to form a through second groove segment and a second sub-opening;

[0043] In the step of patterning the first material layer to form the first groove and the first depression via the second groove and the second sub-opening at a first longitudinal etching rate: the first material layer is patterned to form the first groove and the first depression at a second lateral etching amount, wherein the second lateral etching amount is greater than the first lateral etching amount.

[0044] The third aspect of this application also provides a display device, including the display panel provided in any of the first aspect embodiments or the display panel prepared in any of the second aspect embodiments.

[0045] In the display panel provided in this application embodiment, the display panel includes a substrate, a first electrode layer, a pixel definition layer, and a light-emitting structure layer. The first electrode layer includes a plurality of first electrodes spaced apart. The first electrodes and the pixel openings in the pixel definition layer at least partially overlap in the orthographic projection onto the substrate. At least a portion of the light-emitting units of the light-emitting structure layer are located in the pixel openings, allowing the first electrodes to contact the light-emitting units within the pixel openings and drive the light-emitting units to emit light. The first conductive electronic layer of the first electrodes covers the sidewalls of the pixel definition portion facing the pixel openings and a portion of the top surface, which can increase the distribution area of ​​the first conductive electronic layer, increase the contact area between the first conductive electronic layer and the light-emitting units, and thus increase the effective light-emitting area, thereby improving the display effect of the display panel. A groove is provided on the top surface of the pixel definition portion. The groove has a first sidewall and a second sidewall. The first conductive electronic layer includes a first end cut off by the first sidewall, allowing the first conductive electronic layer to be isolated at the groove position. This improves the problem that the distribution area of ​​the first conductive electronic layer is too large and easily short-circuits with the subsequently fabricated second electrode layer, thereby improving the process performance of the display panel and increasing the fabrication yield of the display panel. Attached Figure Description

[0046] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar features.

[0047] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0048] Figure 2 yes Figure 1 A partially enlarged structural diagram;

[0049] Figure 3 yes Figure 2 A partial sectional view;

[0050] Figure 4 yes Figure 2 A partially enlarged structural diagram;

[0051] Figure 5 This is a schematic diagram of a pixel driving circuit structure for a display panel provided in an embodiment of this application;

[0052] Figure 6 yes Figure 2 A partially enlarged structural schematic diagram in another embodiment;

[0053] Figure 7 yes Figure 2 A partially enlarged structural schematic diagram in yet another embodiment;

[0054] Figure 8 yesFigure 2 A partially enlarged structural schematic diagram in yet another embodiment;

[0055] Figure 9 yes Figure 2 A partial cross-sectional view in another embodiment;

[0056] Figure 10 yes Figure 2 A partial cross-sectional view in yet another embodiment;

[0057] Figure 11 yes Figure 2 A partial cross-sectional view in yet another embodiment;

[0058] Figure 12 This is a schematic flowchart of a method for manufacturing a display panel provided in an embodiment of this application;

[0059] Figure 13 This is a schematic flowchart of a method for manufacturing a display panel according to another embodiment of this application.

[0060] Explanation of reference numerals in the attached figures:

[0061] 100. Substrate;

[0062] 200, Pixel definition layer; 201, First definition layer; 202, Second definition layer; 210, Pixel defining portion; 211, First definition portion; 211a, First side surface; 211b, First sub-surface; 211c, Second sub-surface; 212, Second definition portion; 212a, Second side surface; 212b, Third sub-surface; 213, Top surface; 214, Bottom surface; 220, Pixel opening; 221, First sub-opening; 222, Second sub-opening; 230, Light-emitting unit; 240, Groove; 241, First sub-segment; 242, Second sub-segment; 243, Third sub-segment; 244, First slot segment; 245, Second slot segment; 250, Connecting area;

[0063] 300. Isolation structure; 301. First sublayer; 302. Second sublayer; 303. Third sublayer; 310. Isolation opening;

[0064] 400, First electrode layer; 410, First electrode; 411, First conductive sublayer; 411a, Separation gap; 411b, First end; 411c, Redundancy section; 412, Second conductive sublayer; 413, Third conductive sublayer; 420, Protective section;

[0065] 500, Second electrode layer; 510, Second electrode;

[0066] 600, Encapsulation layer; 610, First encapsulation layer; 610a, Encapsulation part; 611, First encapsulation part; 612, Second encapsulation part; 613, Third encapsulation part; 620, Second encapsulation layer; 630, Third encapsulation layer;

[0067] α1, First included angle; α2, Second included angle; α3, Third included angle; α4, Fourth included angle; α5, Fifth included angle;

[0068] X, first direction; Y, second direction; Z, thickness direction; AA, display area; NA, non-display area. Detailed Implementation

[0069] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0070] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0071] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. It should be noted that, unless otherwise specified, different features in the embodiments of this application can be combined with each other.

[0072] For ease of understanding, the accompanying diagram shows the mutually orthogonal X-axis, Y-axis, and Z-axis. The direction along the X-axis is called the X-direction, the direction along the Y-axis is called the Y-direction, and the direction along the Z-axis is called the Z-direction. The Z-direction is the normal direction relative to the plane containing the X and Y directions. Furthermore, a view where various elements are observed parallel to the plane containing the X and Y directions is called a top view. Alternatively, the planes in the X and Y directions can be planes parallel to the display surface of the display panel, and the Z-direction can be a direction parallel to the thickness direction of the display panel.

[0073] For certain elements, terms like "above" or "overhead" are sometimes used when describing the position of an element in the Z direction, and "below" or "under" are used when describing the position of an element in the opposite direction. Furthermore, when using terms like "above," "overhead," "below," "under," or "relative" to define the positional relationship between two elements, this includes not only the state where the two elements are directly adjacent, but also the state where the two elements are separated by gaps or other elements. Additionally, terms like "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0074] Figure 1 This is a schematic diagram of a display panel according to one embodiment of this application. The display panel can be an organic light-emitting diode (OLED) display panel or a quantum dot light-emitting diode (QLED) display panel. The display panel includes a display area AA with display function and a non-display area NA.

[0075] The display area AA of the display panel can be rectangular, square, circular, oval, or other shapes.

[0076] The display area AA includes a plurality of pixels PX arranged in the X and Y directions. Each pixel PX includes a plurality of sub-pixels SPX displaying different colors. In some embodiments, a pixel PX includes a first sub-pixel SPX1, a second sub-pixel SPX2, and a third sub-pixel SPX3. For example, the first sub-pixel SPX1 is a blue sub-pixel, the second sub-pixel SPX2 is a green sub-pixel, and the third sub-pixel SPX3 is a red sub-pixel. In some embodiments, in addition to sub-pixels SPX1, SPX2, and SPX3, a pixel PX also includes sub-pixels SPX that emit white or other colors of light.

[0077] A sub-pixel SPX includes a pixel circuit and a light-emitting device driven by the pixel circuit to emit light of the corresponding color. The first sub-pixel SPX1 includes a first light-emitting device, the second sub-pixel SPX2 includes a second light-emitting device, and the third sub-pixel SPX3 includes a third light-emitting device. One pixel circuit drives at least one light-emitting device to emit light. For example, a display area AA includes a normal display area AA and a light-transmitting display area AA. The light-transmitting display area AA is a display area AA that corresponds to a sensor and has light-transmitting properties, while the normal display area AA is a display area AA that does not correspond to a sensor. In the normal display area AA, one pixel circuit drives one light-emitting device to emit light, and in the light-transmitting display area AA, one pixel circuit drives one or more light-emitting devices to emit light.

[0078] likeFigure 2 and Figure 3 As shown, a first aspect of this application provides a display panel, which includes: a substrate 100; a first electrode layer 400 disposed on one side of the substrate 100 and including a plurality of first electrodes 410 spaced apart; and a pixel definition layer 200 disposed on one side of the substrate 100 and including a pixel defining portion 210 and a pixel opening 220, wherein the plurality of pixel openings 220 are arrayed, and the orthographic projections of the pixel openings 220 on the substrate 100 and the orthographic projections of the first electrodes 410 on the substrate 100 at least partially overlap, wherein the pixel defining portion 210 has a top surface 213 facing away from the substrate 100 and has a projection from the top surface 213 towards the pixel defining portion 200. The substrate 100 has a plurality of recessed grooves 240, each groove 240 being disposed around a portion of a corresponding pixel opening 220 and having opposing first and second sidewalls, the first sidewall being closer to the corresponding pixel opening 220 than the second sidewall; a light-emitting structure layer including light-emitting units 230 at least partially located in the pixel opening 220; wherein, the first electrode 410 includes a first conductive sublayer 411, the first conductive sublayer 411 covering the sidewall of the pixel defining portion 210 facing the pixel opening 220 and a portion of the top surface 213, the first conductive sublayer 411 including a first end portion 411b that terminates at the first sidewall.

[0079] In the display panel provided in this embodiment, the display panel includes a substrate 100, a first electrode layer 400, a pixel definition layer 200, and a light-emitting structure layer. The first electrode layer 400 includes a plurality of first electrodes 410 spaced apart. The first electrodes 410 and the pixel openings 220 in the pixel definition layer 200 at least partially overlap in their orthogonal projections onto the substrate 100. At least a portion of the light-emitting units 230 in the light-emitting structure layer is located in the pixel openings 220, so that the first electrodes 410 can contact the light-emitting units 230 within the pixel openings 220, and the first electrodes 410 can drive the light-emitting units 230 to emit light. The first conductive layer 411 of the first electrodes 410 covers the sidewall of the pixel defining portion 210 facing the pixel opening 220 and a portion of the pixel defining portion 210 facing away from the top surface 213 of the substrate 100, which can increase the distribution area of ​​the first conductive layer 411, increase the contact area between the first conductive layer 411 and the light-emitting units 230, thereby increasing the effective light-emitting area and improving the display effect of the display panel. The top surface 213 of the pixel limiting portion 210 is provided with a groove 240. The groove 240 has a first sidewall and a second sidewall. The first conductive sublayer 411 includes a first end 411b that is cut off by the first sidewall, so that the first conductive sublayer 411 can be isolated at the groove 240 position. This improves the problem that the distribution area of ​​the first conductive sublayer 411 is too large and it is easy to short-circuit with the subsequently prepared second electrode layer 500, thereby improving the process performance of the display panel and increasing the manufacturing yield of the display panel.

[0080] Optionally, the first conductive layer 411 may include a partition gap 411a provided by the groove 240, with a first end 411b located on the side of the partition gap 411a facing the pixel opening 220.

[0081] In some alternative embodiments, such as Figures 2 to 4 As shown, the display panel further includes: an isolation structure 300 disposed on one side of the substrate 100 and forming a plurality of isolation openings 310, wherein the isolation openings 310 are connected to the corresponding pixel openings 220, and the light-emitting unit 230 is located within the corresponding isolation opening 310; and a second electrode layer 500 including a second electrode 510 located on the side of the light-emitting unit 230 away from the substrate 100, wherein the groove 240 forms a connection region 250 around the two ends of the pixel opening 220, and the second electrode 510 extends through the connection region 250 and connects to the isolation structure 300.

[0082] In these optional embodiments, the groove 240 is disposed around a portion of the pixel opening 220, thus a connection region 250 is provided between the two ends of the groove 240 surrounding the pixel opening 220. The second electrode 510 can be connected to the isolation structure 300 via the connection region 250, which can improve the short-circuit connection problem between the second electrode 510 and the first conductive layer 411. In addition, the groove 240 is disposed around a portion of the pixel opening 220, and the first conductive layer 411 forms a partition gap 411a at the location of the groove 240. The first conductive layer 411 is divided into two mutually insulated parts by the partition gap 411a, which can improve the short-circuit connection problem between the first conductive layer 411 and the isolation structure 300.

[0083] The first electrode 410 can be a single-layer structure including a first conductive sublayer 411, or the first electrode 410 can include multiple sublayers.

[0084] It should be noted that the first electrode 410 is preferably a single-layer structure including a first conductive electron layer 411. In this way, the first electrode 410, the light-emitting unit 230 and the second electrode 510 can all be formed by vapor deposition and separated by the isolation structure 300, which simplifies the process.

[0085] The first electrode 410 can have multiple sub-layers arranged in various ways. For example, the multiple sub-layers may include a metal layer and a pair of conductive oxide layers covering the upper and lower surfaces of the metal layer, respectively. For example, the first conductive sub-layer 411 may be a conductive oxide layer, and the material of the first conductive sub-layer 411 may include a metal oxide. The multiple sub-layers may also include a second conductive sub-layer 412, which is located on the side of the first conductive sub-layer 411 facing the substrate 100. A portion of the second conductive sub-layer 412 is in contact with the first conductive sub-layer 411, and another portion of the second conductive sub-layer 412 is located between the pixel defining portion 210 and the substrate 100. Optionally, the second conductive sub-layer 412 may be a metal layer, and the material of the second conductive sub-layer 412 may include a metallic material, such as silver. Each conductive oxide layer may be formed, for example, a transparent conductive oxide such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), or IGZO (Indium Gallium Zinc Oxide).

[0086] Optionally, the first electrode 410 further includes a third conductive layer 413, which is located on the side of the second conductive layer 412 facing the substrate 100. The orthographic projection of the third conductive layer 413 onto the substrate 100 and the orthographic projection of the second conductive layer 412 onto the substrate 100 can overlap, and the third conductive layer 413 and the second conductive layer 412 are in contact, so that the third conductive layer 413 and the second conductive layer 412 can be fabricated in the same patterning process. Optionally, the third conductive layer 413 may be, for example, a conductive oxide layer, which can improve the problem of the second conductive layer 412 being easily oxidized.

[0087] Optionally, a protective portion 420 is provided between the second conductive sublayer 412 and the pixel defining portion 210, the protective portion 420 surrounding the pixel opening 220. By providing the protective portion 420, during the fabrication of the second conductive sublayer 412 and the third conductive sublayer 413, an insulating material can be deposited on the material layer of the second conductive sublayer 412. This insulating material provides protection to the second conductive sublayer 412. Before fabricating the first conductive sublayer 411, the insulating material is patterned to form the protective portion 420 surrounding the pixel opening 220. That is, the material of the protective portion 420 includes insulating material, and the subsequent first conductive sublayer 411 can be electrically connected to the second conductive sublayer 412 via the pixel opening 220. Before the first conductive sublayer 411 covers the second conductive sublayer 412, the insulating material provides insulating protection to the second conductive sublayer 412. The material of the protective portion 420 includes, for example, photoresist, giving the protective portion 420 good insulating properties and making it easy to pattern, thus reducing the complexity of the fabrication process.

[0088] There are multiple, selectable ways to set up the substrate 100, such as... Figure 3 As shown, the substrate 100 further includes a substrate and a pixel driving circuit. For example, the substrate 100 includes a substrate and a driving circuit layer and a planarization layer disposed on the substrate. The pixel driving circuit includes a transistor and a capacitor. The capacitor includes a first electrode and a second electrode. The transistor includes a source, a drain, a gate, and a semiconductor layer. The driving circuit layer also includes multiple signal lines, such as data signal lines, scan signal lines, driving power supply voltage signal lines, etc. The driving circuit layer includes multiple conductive layers, including a first conductive layer, a second conductive layer, and a third conductive layer. The gate and the first electrode may be located on the first conductive layer, the second electrode may be located on the second conductive layer, and the source and drain may be located on the third conductive layer.

[0089] Optional, see reference Figure 5The pixel driving circuit includes a driving transistor T1 and a switching transistor T2. The source of the switching transistor T2 is connected to the data line that provides the data signal Data, the gate of the switching transistor T2 is connected to the scan line that provides the scan signal Scan, the drain of the switching transistor T2 is connected to the gate of the driving transistor T1, the two ends of the storage capacitor C1 are connected to the gate and the source of the driving transistor T1 respectively, and the drain of the driving transistor T1 is connected to the light-emitting device. Figure 5 This is one implementation of the pixel driving circuit, but the pixel driving circuit of this application is not limited to... Figure 5 The pixel driving circuit shown in the 2T1C diagram can also be other pixel driving circuits, such as 7T1C, 8T1C, etc.

[0090] In some alternative embodiments, such as Figure 3 As shown, the isolation structure 300 includes a first sub-layer 301 and a second sub-layer 302 stacked in a direction away from the substrate 100, with the second sub-layer 302 protruding relative to the first sub-layer 301 toward the isolation opening 310.

[0091] In these alternative embodiments, the isolation structure 300 includes a first sub-layer 301 and a second sub-layer 302, the second sub-layer 302 protruding relative to the first sub-layer 301 toward the isolation opening 310, such that a recess can be formed beneath the second sub-layer 302. During the fabrication of the light-emitting unit 230, the light-emitting material can be broken into independent light-emitting units 230 at the edge of the second sub-layer 302.

[0092] Optionally, the isolation structure 300 further includes a third sub-layer 303, which is located on the side of the first sub-layer 301 facing the substrate 100, and protrudes from the first sub-layer 301 toward the isolation opening 310. During the fabrication of the isolation structure 300, when the first sub-layer 301 is side-etched, the third sub-layer 303 can provide protection to the film layer on the substrate 100 side.

[0093] Optionally, the materials of the first sublayer 301 and the second sublayer 302 are different, and the etching rate of the first sublayer 301 is lower than that of the second sublayer 302. The material of the first sublayer 301 includes a conductive material, specifically including at least one of aluminum (Al) and aluminum alloys, and the aluminum alloys may include at least one of aluminum-neodymium alloy (AlNd), aluminum-yttrium alloy (AlY), or aluminum-silicon alloy (AlSi). The second sublayer 302 can be a single-layer structure or a multi-layer structure. If the second sublayer 302 is a single-layer structure, the material of the second sublayer 302 may include at least one of titanium, titanium nitride, molybdenum, tungsten, molybdenum-tungsten alloy, or molybdenum-niobium alloy. If the second sublayer 302 is a multi-layer structure, one layer of the second sublayer 302 may be made of at least one of titanium, titanium nitride, molybdenum, tungsten, molybdenum-tungsten alloy, or molybdenum-niobium alloy, and the other layer of the second sublayer 302 may be made of a conductive oxide or an inorganic insulating material, such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0094] Optionally, the material of the third sublayer 303 includes a conductive material. For example, the material of the third sublayer 303 may include at least one of molybdenum (Mo), titanium (Ti), titanium nitride (TiN), molybdenum-tungsten alloy (MoW), or molybdenum-niobium alloy (MoNb).

[0095] Optionally, referring to the above, the display panel further includes a second electrode layer 500, which includes a second electrode 510 located on the side of each light-emitting unit 230 facing away from the substrate 100. Optionally, the light-emitting device is composed of the first electrode 410, the light-emitting unit 230, and the second electrode 510 described above. Optionally, the second electrode 510 is located in each isolation opening 310, and the second electrode 510 is electrically connected to the isolation structure 300 via the connection region 250. For example, the material of the first sub-layer 301 includes a conductive material, and the second electrode 510 is electrically connected to the first sub-layer 301 via the connection region 250. Alternatively, the materials of both the first sub-layer 301 and the third sub-layer 303 include conductive materials, and the second electrode 510 is electrically connected to the third sub-layer 303 and the first sub-layer 301 via the connection region 250.

[0096] Optionally, at least one light-emitting unit 230 includes a hole injection layer HIL, a hole transport layer HTL, an electron blocking layer EBL, a light-emitting material layer EML, a hole blocking layer HBL, an electron transport layer ETL, and an electron injection layer EIL stacked along a direction away from the substrate 100 (thickness direction Z). The light-emitting unit 230 may include a single light-emitting material layer EML, or a stacked light-emitting structure including multiple light-emitting material layers EML.

[0097] During the light emission process of the light-emitting unit 230, the first electrode 410 is used to generate holes, and the second electrode 510 is used to generate electrons. Holes and electrons combine within the light-emitting unit 230, causing the light-emitting unit 230 to emit light. The first electrode 410 is in contact with the light-emitting unit 230, and a portion of the light-emitting unit 230 may overlap with the isolation structure 300. This can cause holes to crosstalk between adjacent light-emitting units 230 through the light-emitting unit 230 and the isolation structure 300. In this embodiment, the pixel limiting portion 210 is provided with a recess, which allows at least a portion of the light-emitting unit 230 to break at the recess, thereby reducing the hole transmission area and improving the problem of lateral crosstalk.

[0098] In order for the light-emitting unit 230 to emit light, a pixel voltage is provided to the first electrode 410 and a common voltage is provided to the second electrode 510, respectively, forming a potential difference between the first electrode 410 and the second electrode 510, so that the light-emitting structure disposed between the first electrode 410 and the second electrode 510 emits light. In one embodiment, if a potential difference is formed between the first electrode 410 and the second electrode 510 of the light-emitting unit 230, the light-emitting material layer EML of the light-emitting unit 230 emits light.

[0099] In this circuit, the pixel voltage of the first electrode 410 is provided by the pixel driving circuit, and the common voltage of the second electrode 510 is provided by the isolation structure 300. Specifically, the second electrode 510 is electrically connected to the isolation structure 300, and the common voltage is supplied to the second electrode 510 by providing the isolation structure 300. That is, the isolation structure 300 has the function of supplying a common voltage to the second electrode 510.

[0100] Please refer to the above text. When the isolation structure 300 includes a first sub-layer 301 and a second sub-layer 302, such as Figure 2 As shown, in some optional embodiments, the orthographic projection of the groove 240 onto the substrate 100 is located outside the orthographic projection of the second sublayer 302 onto the substrate 100. That is, the orthographic projections of the groove 240 onto the substrate 100 and the orthographic projections of the second sublayer 302 onto the substrate 100 are misaligned, and the groove 240 and the second sublayer 302 do not overlap. Figure 3 The groove 240 and the second sub-layer 302 have a first spacing distance h1, which can improve the influence of the groove 240 on the morphology of the second sub-layer 302, and thus improve the influence of the groove 240 on the second sub-layer 302 to block the light-emitting material layer, thereby effectively improving the fabrication yield of the light-emitting unit 230.

[0101] Optionally, when the isolation structure 300 includes the aforementioned third sub-layer 303, the orthographic projection of the groove 240 onto the substrate 100 is located outside the orthographic projection of the third sub-layer 303 onto the substrate 100. That is, the orthographic projections of the groove 240 and the third sub-layer 303 onto the substrate 100 are misaligned, and the groove 240 and the third sub-layer 303 do not overlap. Figure 3 As shown, there is a second spacing distance h2 between the groove 240 and the third sub-layer 303, which can improve the influence of the groove 240 on the morphology of the third sub-layer 303.

[0102] In some optional embodiments, the display panel further includes a redundancy portion 411c, the first conductive sublayer 411 and the redundancy portion 411c being spaced apart by the groove 240, the redundancy portion 411c being located on the side of the groove 240 facing the isolation structure 300, and the minimum distance between the orthographic projection of the redundancy portion 411c on the substrate 100 and the orthographic projection of the isolation structure 300 on the substrate 100 being a first distance; in the connection region 250, the minimum distance between the orthographic projection of the first conductive sublayer 411 on the substrate 100 and the orthographic projection of the isolation structure 300 on the substrate 100 being a second distance, the second distance being equal to the first distance.

[0103] In these alternative embodiments, the first distance and the second distance are equal, and the evaporation angle of the first conductive layer 411 in the circumferential direction of the isolation opening 310 can be the same. The first end portion 411b and the redundant portion 411c are formed by the groove 240, which can improve the short-circuit connection problem between the first conductive layer 411 and the isolation structure 300, and simplify the preparation process of the first conductive layer 411.

[0104] Optionally, the aforementioned partition gap 411a is formed between the first end 411b and the redundant part 411c.

[0105] In some alternative embodiments, on the side where the groove 240 is located, the light-emitting unit 230 covers the first conductive sublayer 411, and the edge of the second electrode 510 is recessed toward the pixel opening 220 relative to the edge of the light-emitting unit 230.

[0106] In these alternative embodiments, the light-emitting unit 230 is fabricated after the first conductive layer 411. The light-emitting unit 230 may cover the first conductive layer 411. On the side where the groove 240 is located, the edge of the second electrode 510 is recessed relative to the edge of the light-emitting unit 230 toward the pixel opening 220. That is, the edge of the light-emitting unit 230 is protruding relative to the edge of the second electrode 510 toward the groove 240, which can improve the short-circuit connection problem between the first conductive layer 411 and the second electrode 510.

[0107] Optionally, on the side where the groove 240 is located, the light-emitting unit 230 can cover the first end 411b, that is, the light-emitting unit 230 can extend to the first sidewall of the groove 240, or the end of the light-emitting unit 230 facing the groove 240 can be recessed relative to the first end 411b facing the pixel opening 220.

[0108] In some alternative embodiments, on the side where the connection region 250 is located, the light-emitting unit 230 covers the edge of the first conductive sublayer 411, and the edge of the second electrode 510 protrudes toward the isolation structure 300 relative to the edge of the light-emitting unit 230 and is connected to the isolation structure 300.

[0109] In these alternative embodiments, on the side where the connection region 250 is located, the second electrode 510 covers the light-emitting unit 230 and protrudes toward the isolation structure 300 relative to the light-emitting unit 230, while the light-emitting unit 230 covers the edge of the first conductive layer 411. The light-emitting unit 230 can achieve mutual insulation between the first conductive layer 411 and the second electrode 510, thereby improving the problem of short circuit connection between the first conductive layer 411 and the second electrode 510 on the side where the connection region 250 is located.

[0110] In some optional embodiments, the plurality of light-emitting units 230 include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit with different light-emitting colors, and at least two of the first light-emitting units, the second light-emitting unit, and the third light-emitting unit correspond to different thicknesses of the first conductive layer 411.

[0111] In these optional embodiments, the thickness of the first conductive layer 411 corresponding to the light-emitting units 230 with different light-emitting colors is different, which can precisely control the microcavity effect of the light-emitting units 230 with different colors and improve the light-emitting effect.

[0112] The distribution pattern of the recesses 240 on the plane of the display surface can be varied, for example, as shown in... Figure 4As shown, the groove 240 includes a first segment 241 located on at least one side of the pixel opening 220 in the first direction X and extending along the second direction Y. In these optional embodiments, the groove 240 may only include the first segment 241 disposed on one side of the pixel opening 220 in the first direction X, or the groove 240 may include the first segments 241 disposed on both sides of the pixel opening 220 in the first direction X. The groove 240 is located on one or both sides of the pixel opening 220 in the first direction X, and a connection region 250 may be formed on at least one side of the pixel opening 220 in the second direction Y. During the fabrication of the second electrode 510, the second electrode 510 can be fabricated using a linear evaporation source extending along the first direction X and moving along the second direction Y, such that the second electrode 510 can overlap with the isolation structure 300 on at least one side of the pixel opening 220 in the second direction Y.

[0113] When the groove 240 includes a first segment 241 located on at least one side of the pixel opening 220 in the first direction X and extending along the second direction Y, the first end portion 411b of the first conductive sublayer 411 is located on at least one side of the first conductive sublayer 411 in the first direction X. On at least one side of the pixel opening 220 in the first direction X, the light-emitting unit 230 covers the first conductive sublayer 411, and the edge of the second electrode 510 is recessed towards the pixel opening 220 relative to the edge of the light-emitting unit 230. On both sides of the pixel opening 220 in the second direction Y, the light-emitting unit 230 covers the edge of the first conductive sublayer 411, and the edge of the second electrode 510 protrudes towards the isolation structure 300 relative to the edge of the light-emitting unit 230 and is connected to the isolation structure 300.

[0114] Optionally, the light-emitting unit 230 can also be prepared using a linear evaporation source that extends along the first direction X and moves along the second direction Y. Optionally, during the preparation of the first conductive layer 411, the first conductive layer 411 can be prepared using an evaporation source that extends along the second direction Y and moves along the first direction X, such that the first end 411b of the first conductive layer 411 facing the groove 240 in the first direction X is covered by the light-emitting unit 230, the edge of the second electrode 510 in the first direction X is recessed relative to the light-emitting unit 230 facing the pixel opening 220, and the edges on both sides of the first conductive layer 411 in the second direction Y are completely covered by the light-emitting unit 230, which improves the short-circuit connection problem between the second electrode 510 and the first conductive layer 411, and is easier to implement in the process.

[0115] In some other alternative embodiments, such as Figure 6 and Figure 7As shown, the groove 240 includes the first segment 241 located on one side of the pixel opening 220 in the first direction X, and the groove 240 also includes a second segment 242 connected to the first segment 241 on at least one side in the second direction Y and extending along the first direction X. In these optional embodiments, the groove 240 may be L-shaped, with a connection region 250 formed between the two opposite ends of the first segment 241 and the second segment 242 of the groove 240, or the groove 240 may be U-shaped, with a connection region 250 formed between the ends of the two second segments 242 opposite to the first segment 241.

[0116] In some alternative embodiments, such as Figure 8 As shown, the groove 240 includes a first sub-segment 241 and a second sub-segment 242, and the groove 240 further includes a third sub-segment 243 connected to the side of the second sub-segment 242 opposite to the first sub-segment 241 and extending along the second direction Y. In these optional embodiments, by adding the third sub-segment 243, the distribution area of ​​the groove 240 can be increased, so that more of the first sub-layer 301 is isolated, thus better improving the problem of short-circuit connection between the first sub-layer 301 and the isolation structure 300 and the second electrode 510.

[0117] There are various ways to set the material of the pixel definition layer 200. For example, the pixel definition layer 200 can be made of an inorganic material, such as using at least one of silicon nitride (SiNx), silicon oxide (SiOx), and silicon oxynitride (SiON) as an inorganic insulating material. Figure 2 As shown, the pixel definition layer 200 can be a single-layer structure.

[0118] In one implementation, such as Figure 9 and Figure 10 As shown, the pixel definition layer 200 includes multiple definition sub-layers. The pixel definition layer 200 includes a first definition layer 201 and a second definition layer 202 that are stacked sequentially along the direction away from the substrate 100. That is, the pixel definition layer 200 can adopt a double-layer design.

[0119] For example, the first defining layer 201 has better film-forming properties than the second defining layer 202. That is, under the same thickness conditions, the first defining layer 201 can better cover the stepped structure formed by the first electrode 410 than the second defining layer 202, without causing cracks. Conversely, to obtain the same stepped coverage effect, the thickness of the first defining layer 201 needs to be thinner than that of the second defining layer 202. That is, the thickness requirement for the first defining layer 201 is relatively low, which is beneficial for product thinning. In addition, better film-forming properties are reflected in the better coverage of the formed film, which is denser and more conducive to the isolation of moisture. That is, the material density of the first defining layer 201 is greater than that of the second defining layer 202.

[0120] For example, the second defining layer 202 has better etching resistance than the first defining layer 201. Since the side of the pixel defining layer 200 facing away from the substrate 100 will be etched during the manufacturing process of the display panel, by selecting a material with stronger etching resistance as the second defining layer 202, the etching resistance of the pixel defining layer 200 can be improved, thereby further improving the reliability of the display panel.

[0121] For example, the first defining layer 201 and the second defining layer 202 are made of different materials. For instance, the first defining layer 201 is made of silicon nitride, and the second defining layer 202 is made of silicon oxide.

[0122] For example, the thickness of the first defining layer 201 is greater than or equal to 1000 micrometers and less than or equal to 5000 micrometers. For instance, the thickness of the first defining layer 201 is 1000 micrometers, 2000 micrometers, 3000 micrometers, 4000 micrometers, 5000 micrometers, etc.

[0123] For example, the thickness of the second defining layer 202 is greater than or equal to 500 micrometers and less than or equal to 3000 micrometers. For instance, the thickness of the second defining layer 202 is 500 micrometers, 1000 micrometers, 2000 micrometers, 3000 micrometers, etc.

[0124] Optional, such as Figure 9 and Figure 10 As shown, when the pixel definition layer 200 includes a first definition layer 201 and a second definition layer 202, the pixel defining portion 210 includes a first defining portion 211 located in the first definition layer 201 and a second defining portion 212 located in the second definition layer 202. When the pixel defining portion 210 includes the first defining portion 211 and the second defining portion 212, the groove 240 can be configured in various ways. For example, as... Figure 9 As shown, the groove 240 may extend from the top surface 213 to the second defining portion 212, or, as... Figure 10 As shown, the groove 240 can extend from the top surface 213 to the first definition portion 211 via the second definition portion 212, that is, the groove 240 is provided at least in the second definition portion 212.

[0125] Optionally, the pixel opening 220 includes a first sub-opening 221 disposed in the first defining portion 211 and a second sub-opening 222 disposed in the second defining portion 212. Optionally, the orthographic projection of the second sub-opening 222 onto the substrate 100 is located within the orthographic projection of the first sub-opening 221 onto the substrate 100, so as to avoid forming a concave shape under the second sub-opening 222 that would affect the continuity of the light-emitting unit 230 and the second electrode 510.

[0126] Optionally, the thickness of the first defining portion 211 is greater than the thickness of the second defining portion 212, so that the first defining portion 211 can better cover the second sub-layer 302, the third sub-layer 303, etc. of the first electrode 410.

[0127] In some alternative embodiments, such as Figure 10 As shown, the groove 240 is disposed on the first defining portion 211 and the second defining portion 212. The groove 240 includes: a first groove segment 244, which is recessed from the surface of the first defining portion 211 away from the substrate 100 toward the substrate 100; and a second groove segment 245, which is disposed through the second defining portion 212, and the first groove segment 244 and the second groove segment 245 are interconnected.

[0128] In these optional embodiments, the groove 240 is disposed at the first defining portion 211 and the second defining portion 212, which increases the depth of the groove 240, allowing the groove 240 to better isolate the first sub-layer 301. The groove 240 includes a first groove segment 244 and a second groove segment 245. The first groove segment 244 is disposed at the first defining portion 211 and is formed by a recess in the surface of the first defining portion 211. The first groove segment 244 does not penetrate through the first defining portion 211 to avoid forming a through hole in the pixel defining portion, which could cause the second electrode 510 to be short-circuited to the first electrode 410 through the through hole. The second groove segment 245 penetrates through the second defining portion 212, allowing the second groove segment 245 to communicate with the first groove segment 244.

[0129] In some alternative embodiments, the materials of the first defining portion 211 and the second defining portion 212 are different, and the orthographic projection of the second groove segment 245 on the substrate 100 is located within the orthographic projection of the first groove segment 244 on the substrate 100.

[0130] In these alternative embodiments, the materials of the first defining portion 211 and the second defining portion 212 are different. By controlling the etching parameters of the first defining portion 211 and the second defining portion 212, the radial dimension of the first groove segment 244 can be greater than or equal to the radial dimension of the second groove segment 245. This can increase the tilt angle of the pixel defining portion 210 toward the sidewall of the groove 240, thereby improving the problem that the first sub-layer 301 is continuous on the sidewall of the pixel defining portion 210 toward the groove 240 and that the first sub-layer 301 is difficult to be separated.

[0131] Optionally, the orthographic projection of the second groove segment 245 onto the substrate 100 is smaller than the orthographic projection area of ​​the first groove segment 244 onto the substrate 100. In these optional embodiments, the radial dimension of the second groove segment 245 is smaller, and the radial dimension of the first groove segment 244 is larger, making it easier to form an indentation on the side of the first defining portion 211 facing the groove 240, which can better isolate the first sub-layer 301.

[0132] Optionally, the first defining portion 211 includes a first side surface 211a facing the first groove segment 244, and the second defining portion 212 includes a second side surface 212a facing the second groove segment 245, with at least a portion of the second side surface 212a protruding from the first side surface 211a toward the second groove segment 245.

[0133] In these alternative embodiments, at least a portion of the second side surface 212a is provided to protrude from the first side surface 211a toward the second groove segment 245, and a recess can be formed under the second side surface 212a to better isolate the first sub-layer 301.

[0134] In some optional embodiments, the pixel defining portion 210 has a bottom surface 214 facing the substrate 100, and the first defining portion 211 includes a first sub-surface 211b facing the pixel opening 220. The first sub-surface 211b is located on the side of the first groove segment 244 facing the substrate 100. The first defining portion 211 has a first side surface 211a facing the first groove segment 244, wherein the first sub-surface 211b and the bottom surface 214 are interconnected and a first included angle α1 is formed between the first sub-surface 211b and the bottom surface 214, and a second included angle α2 is formed between the extension surface of the first side surface 211a and the extension surface of the bottom surface 214, and the first included angle α1 is greater than the second included angle α2.

[0135] In these optional embodiments, the first sub-surface 211b of the first defining portion 211 is located on the side of the first groove segment 244 facing the substrate 100, that is, the first sub-surface 211b is located below the first groove segment 244. During the fabrication of the pixel defining layer 200, the pixel defining layer 200 can be patterned to form the first sub-surface 211b after the first groove segment 244 is fabricated. The first defining portion 211 has a first side surface 211a facing the first groove segment 244. The first side surface 211a is located on the side of the first sub-surface 211b away from the substrate 100, and the first side surface 211a is fabricated before the first sub-surface 211b. The first included angle α1 between the first sub-surface 211b and the bottom surface 214 is greater than the second included angle α2 between the first side surface 211a and the bottom surface 214. After the first side surface 211a is fabricated, a faster longitudinal etching rate can be selected to pattern the pixel defining layer 200 to form the first sub-surface 211b, which can improve the fabrication efficiency of the pixel defining layer 200. In addition, the first side surface 211a is prepared by using a smaller longitudinal etching rate, which can increase the preparation time of the first groove segment 244, so that the first defining part 211 can be fully etched, and the radial dimension of the first groove segment 244 is larger than the radial dimension of the second groove segment 245.

[0136] Optionally, the second defining part 212 includes a second side surface 212a facing the second groove segment 245, and a third included angle α3 is formed between the extended surface of the second side surface 212a and the extended surface of the bottom surface 214, wherein the first included angle α1 is greater than the third included angle α3.

[0137] In these optional embodiments, the second defining portion 212 is located on the side of the first sub-surface 211b facing away from the substrate 100, and the second side surface 212a of the second defining portion 212 is prepared before the first sub-surface 211b. The first included angle α1 is greater than the third included angle α3 between the second side surface 212a and the bottom surface 214. After the second side surface 212a is prepared, a faster longitudinal etching rate can be selected to pattern the pixel defining layer 200 to form the first sub-surface 211b, which can improve the preparation efficiency of the pixel defining layer 200. In addition, the second side surface 212a is prepared using a smaller longitudinal etching rate, which can increase the preparation time of the second groove segment 245, so that the second defining portion 212 can be sufficiently etched, increasing the radial dimension of the second groove segment 245, thereby improving the isolation effect of the groove 240.

[0138] In some optional embodiments, the first defining part 211 further includes a second sub-surface 211c connected to the side of the first sub-surface 211b away from the substrate 100, and a fourth included angle α4 is formed between the extended surface of the second sub-surface 211c and the bottom surface 214, wherein the first included angle α1 is greater than the fourth included angle α4.

[0139] In these optional embodiments, the first defining portion 211 is connected to a second sub-surface 211c on the side of the first sub-surface 211b facing away from the substrate 100. The second sub-surface 211c is located on the side of the first sub-surface 211b facing away from the substrate 100, and the second sub-surface 211c is prepared before the first sub-surface 211b. The first included angle α1 between the first sub-surface 211b and the bottom surface 214 is greater than the fourth included angle α4 between the second sub-surface 211c and the bottom surface 214. After the second sub-surface 211c is prepared, a faster vertical etching rate can be selected to pattern the pixel defining layer 200 to form the first sub-surface 211b, which can improve the preparation efficiency of the pixel defining layer 200.

[0140] Optionally, a portion of the second sub-surface 211c is located in the first defining portion 211, and the second sub-surface 211c may be located in the second defining portion 212. The side surface of the first defining portion 211 facing the pixel opening 220 and the side surface of the second defining portion 212 facing the pixel opening 220 may smoothly transition.

[0141] Alternatively, the side surface of the first defining portion 211 facing the pixel opening 220 protrudes relative to the side surface of the second defining portion 212 facing the pixel opening 220. The second defining portion 212 facing the pixel opening 220 has a third sub-surface 212b, and a fifth included angle α5 is formed between the extended surface of the third sub-surface 212b and the bottom surface 214, wherein the first included angle α1 is greater than the fifth included angle α5. This can also improve the fabrication efficiency of the pixel defining layer 200.

[0142] Optionally, the second included angle α2 and the fourth included angle α4 are equal, so that the second sub-surface 211c and the first side surface 211a can be formed in the same process step, which can simplify the manufacturing process of the display panel.

[0143] Optionally, the fifth included angle α5 and the third included angle α3 are equal. This allows the third sub-surface 212b and the second side surface 212a to be formed in the same process step, simplifying the manufacturing process of the display panel.

[0144] In some optional embodiments, the first electrode 410 may include the first conductive sublayer 411, the second conductive sublayer 412, and the protective portion 420 described above. Optionally, the protective portion 420 is flush with the edge of the pixel opening 220 and the edge of the second conductive sublayer 412. This flush alignment is not strictly geometric; for example, if the distance between the edge of the protective portion 420 and the edge of the second conductive sublayer 412 is less than or equal to 2 micrometers, it can be considered that the edge of the protective portion 420 and the edge of the second conductive sublayer 412 are flush, allowing the edge of the protective portion 420 and the edge of the second conductive sublayer 412 to be formed in the same process step.

[0145] like Figure 3 As shown, the display panel also includes a first encapsulation layer 610, which includes a plurality of encapsulation portions 610a. The encapsulation portions 610a are located on the side of the second electrode 510 away from the substrate 100 and extend through the sidewall of the isolation structure 300 to the side of the isolation structure 300 away from the substrate 100.

[0146] For example, such as Figure 11 As shown, the encapsulation part 610a includes a first segment and a second segment that are connected to each other. The first segment is located inside the isolation opening 310 and is disposed on the side of the light-emitting unit 230 away from the substrate 100. The second segment is located on the side of the isolation structure 300 facing the isolation opening 310. The surface of the first segment away from the substrate 100 and the surface of the second segment away from the isolation structure 300 are at least partially connected to each other to enclose and form a gap space.

[0147] For example, such as Figure 3 As shown, the surface of the first segment facing away from the substrate 100 and the surface of the second segment facing away from the isolation structure 300 may not be connected.

[0148] like Figure 3 As shown, the display panel further includes a second encapsulation layer 620 and a third encapsulation layer 630. The second encapsulation layer 620 covers the isolation structure 300 and the encapsulation portion 610a, and the third encapsulation layer 630 covers the second encapsulation layer 620. Both the first encapsulation layer 610 and the third encapsulation layer 630 are inorganic materials, and the materials of the first encapsulation layer 610 and the third encapsulation layer 630 include at least one of silicon nitride (SiN), silicon oxide (SiO), and silicon oxynitride (SiON). The second encapsulation layer 620 is an organic insulating material, such as epoxy resin, acrylic resin, or other resin materials. The second encapsulation layer 620 and the third encapsulation layer 630 are continuously disposed at least over the entire display area AA, with a portion also disposed in the non-display area NA.

[0149] The display panel 10 may also include at least one film layer such as a touch layer, a polarizer, a color filter substrate 100, and a protective cover. This film layer may also be bonded to the display panel via an adhesive layer such as OCA (Optical Clear Adhesive).

[0150] like Figure 12 As shown, an embodiment of the second aspect of this application also provides a method for manufacturing a display panel. The display panel can be any of the display panels provided in the first aspect embodiments described above. Please refer to both descriptions. Figures 1 to 12 The manufacturing methods for the display panel include:

[0151] Step S01: A second conductive material layer is formed on one side of the substrate 100, and the second conductive material layer is patterned to form multiple spaced second conductive sublayers 412.

[0152] Step S02: A pixel definition material layer is disposed on the side of the second conductive electronic layer 412 away from the substrate 100, and the pixel definition material layer is patterned to form a pixel definition layer 200. The pixel definition layer 200 includes a pixel defining portion 210 and a pixel opening 220. A plurality of pixel openings 220 are arrayed. The pixel defining portion 210 has a top surface 213 away from the substrate 100 and a plurality of grooves 240 recessed from the top surface 213 toward the substrate 100. The grooves 240 are disposed around the corresponding portion of the pixel opening 220 and have opposing first sidewalls and second sidewalls. The first sidewall is closer to the corresponding pixel opening 220 than the second sidewall.

[0153] Step S03: A first conductive material layer is disposed on the side of the pixel definition layer 200 away from the substrate 100, and the first conductive material layer is patterned to form a first conductive sublayer 411. The first conductive sublayer 411 and the second conductive sublayer 412 are combined to form a first electrode 410. The first conductive sublayer 411 covers the sidewall of the pixel defining portion 210 facing the pixel opening 220 and part of the top surface 213. The first conductive sublayer 411 includes a first end portion 411b that is cut off from the first sidewall.

[0154] In the method for fabricating a display panel provided in this application embodiment, a second conductive sublayer 412 is first fabricated in step S01, and then a pixel definition layer 200 and a first conductive sublayer 411 are fabricated in steps S02 and S03. The first conductive sublayer 411 and the second conductive sublayer 412 can form a first electrode 410. The first conductive sublayer 411 of the first electrode 410 covers the sidewall of the pixel defining portion 210 facing the pixel opening 220 and part of the pixel defining portion 210 away from the top surface 213 of the substrate 100, which can increase the distribution area of ​​the first conductive sublayer 411, increase the contact area between the first conductive sublayer 411 and the light-emitting unit 230, and thus increase the effective light-emitting area, thereby improving the display effect of the display panel. The top surface 213 of the pixel limiting portion 210 is provided with a groove 240. The groove 240 includes a first sidewall and a second sidewall. The first conductive sublayer 411 includes a first end 411b that is cut off by the first sidewall, so that the first conductive sublayer 411 can be isolated at the groove 240 position. This improves the problem that the distribution area of ​​the first conductive sublayer 411 is too large and it is easy to short-circuit with the subsequently prepared second electrode layer 500, thereby improving the process performance of the display panel and increasing the manufacturing yield of the display panel.

[0155] Optionally, when the first electrode 410 includes the aforementioned third conductive layer 413 and protective portion 420, in step S01, a third conductive material layer, a second conductive material layer, and an insulating protective material layer can be sequentially disposed on the substrate 100. Then, the third conductive material layer, the second conductive material layer, and the insulating protective material layer are patterned to form multiple spaced second conductive layers 412, third conductive layers 413, and pre-insulating protective portions 420. The orthographic projection of the pre-insulating protective portion 420 onto the substrate 100 overlaps with the orthographic projections of the third conductive layer 413 and the second conductive layer 412 onto the substrate 100, providing relatively complete protection to the second conductive layer 412. Before step S03, the pre-insulating protective portion 420 is patterned to form the protective portion 420, exposing the second conductive layer 412. In step S03, the first conductive material layer can contact and connect with the second conductive layer 412.

[0156] Optionally, the pixel definition layer 200 may include the first definition layer 201 and the second definition layer 202 described above, and the pixel defining portion 210 may include the first definition portion 211 and the second definition portion 212 described above, such as... Figure 13 As shown, step S02 may include:

[0157] Step S021: A first material layer and a second material layer are sequentially disposed on the side of the second conductive layer 412 facing away from the substrate 100.

[0158] Step S022: Pattern the second material layer to form a through second groove segment 245 and a second sub-opening 222.

[0159] Step S023: The first material layer is patterned at a first longitudinal etching rate via the second groove segment 245 and the second sub-opening 222 to form a first groove segment 244 and a first recess, wherein the first groove segment 244 and the first groove segment 244 are interconnected to form the groove 240.

[0160] Step S024: Provide a cover portion in the first slot segment 244 and the second slot segment 245.

[0161] Step S025: The first material layer is further patterned at a second longitudinal etching rate through the second sub-opening 222 and the first recess to form a first sub-opening 221 that penetrates the first material layer. The first sub-opening 221 and the second sub-opening 222 are interconnected to form the pixel opening 220. The second longitudinal etching rate is greater than the first longitudinal etching rate.

[0162] In these optional embodiments, firstly, step S021 sets a first material layer for fabricating the first definition layer 201 and a second material layer for fabricating the second definition layer 202. Then, in step S022, the second definition material layer is patterned to form a second groove segment 245 and a second sub-opening 222. The second groove segment 245 and the second sub-opening 222 are fabricated in the same process step, simplifying the display panel fabrication process. Next, in step S023, a first groove segment 244 and a first recess are fabricated, with the first recess and the first groove segment 244 having the same depth. The first groove segment 244 and the second groove segment 245 can be connected to form a recess 240. After a covering portion is provided in the first groove segment 244 and the second groove segment 245, the first definition material layer is further patterned via the first recess to form a first sub-opening 221. Finally, the first sub-opening 221 and the second sub-opening 222 are interconnected to form a pixel opening 220. The second longitudinal etching rate is greater than the first longitudinal etching rate, which accelerates the fabrication efficiency of the pixel definition layer 200 and improves the fabrication efficiency of the display panel. The first longitudinal etching rate is relatively low, which makes it easier to form sufficiently large grooves 240, etc.

[0163] Optionally, the second side surface 212a and the third sub-surface 212b are formed in step S022, the second sub-surface 211c and the first side surface 211a are formed in step S023, and the first sub-surface 211b is formed in step S025. Since the second longitudinal etching rate is greater than the first longitudinal etching rate, the first included angle α1 is larger, while the second included angle α2, the third included angle α3, the fourth included angle α4, and the fifth included angle α5 are smaller.

[0164] Optionally, in step S023, the second material layer can be patterned with a first lateral etching amount to form a through second trench segment 245 and a second sub-opening 222. In step S025, the first material layer is patterned with a second lateral etching amount to form a first trench segment 244 and a first recess, wherein the second lateral etching amount is greater than the first lateral etching amount.

[0165] In these alternative embodiments, the lateral etching amount of the second groove segment 245 is less than the lateral etching amount of the first groove segment 244, so that the first groove segment 244 has a larger radial dimension, which facilitates the formation of an indentation under the second groove segment 245 and can improve the isolation effect of the groove 240 on the first sub-layer 301.

[0166] The third aspect of this application also provides a display device, including a display panel prepared according to any of the first aspect embodiments or any of the second aspect embodiments. Since the display device of this application includes a display panel prepared according to any of the first aspect embodiments or any of the second aspect embodiments, the display device of this application has the beneficial effects of the display panel prepared according to any of the first aspect embodiments or any of the second aspect embodiments, which will not be elaborated further here.

[0167] The display devices in the application embodiments include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0168] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0169] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0170] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that, include: substrate; A first electrode layer is disposed on one side of the substrate and includes a plurality of first electrodes spaced apart. A pixel definition layer is disposed on one side of the substrate and includes a pixel defining portion and a plurality of pixel openings. The plurality of pixel openings are distributed in an array. The orthographic projection of the pixel openings on the substrate and the orthographic projection of the first electrode on the substrate at least partially overlap. The pixel defining portion has a top surface facing away from the substrate and has a plurality of grooves recessed from the top surface into the substrate. The grooves are disposed around a portion of the corresponding pixel opening and have opposing first sidewalls and second sidewalls. The first sidewall is closer to the corresponding pixel opening than the second sidewall. The light-emitting structure layer includes light-emitting units that are at least partially located in the pixel opening; The first electrode includes a first conductive layer that covers the sidewall of the pixel defining portion facing the pixel opening and a portion of the top surface, and the first conductive layer includes a first end that is cut off from the first sidewall.

2. The display panel according to claim 1, characterized in that, Also includes: An isolation structure is disposed on one side of the substrate and encloses a plurality of isolation openings, wherein the isolation openings are connected to the corresponding pixel openings, and the light-emitting unit is located within the corresponding isolation opening; The second electrode layer includes a second electrode located on the side of the light-emitting unit opposite to the substrate. The groove forms a connection region between the two ends of the pixel opening, and the second electrode extends through the connection region and connects to the isolation structure.

3. The display panel according to claim 2, characterized in that, The isolation structure includes a first sub-layer and a second sub-layer stacked in a direction away from the substrate, the second sub-layer protruding toward the isolation opening relative to the first sub-layer, and the groove being located outside the orthogonal projection of the second sub-layer onto the substrate. And / or, The isolation structure includes a third sublayer, a first sublayer, and a second sublayer stacked in a direction away from the substrate. The third sublayer protrudes toward the isolation opening relative to the first sublayer, and the groove is located outside the orthogonal projection of the third sublayer onto the substrate.

4. The display panel according to claim 2, characterized in that, The groove includes a first sub-segment located on at least one side of the pixel opening in a first direction and extending along a second direction, wherein the first direction and the second direction intersect.

5. The display panel according to claim 2, characterized in that, The display panel further includes a redundant portion, the first conductive sublayer and the redundant portion are spaced apart by the groove, the redundant portion is located on the side of the groove facing the isolation structure, and the minimum distance between the orthographic projection of the redundant portion on the substrate and the orthographic projection of the isolation structure on the substrate is a first distance; In the connection region, the minimum distance between the orthographic projection of the first conductive layer on the substrate and the orthographic projection of the isolation structure on the substrate is the second distance, which is equal to the first distance.

6. The display panel according to claim 2, characterized in that, On the side where the groove is located, the light-emitting unit covers the first conductive layer, and the edge of the second electrode is recessed towards the pixel opening relative to the edge of the light-emitting unit; And / or, on the side where the connection area is located, the light-emitting unit covers the edge of the first conductive layer, and the edge of the second electrode protrudes toward the isolation structure relative to the edge of the light-emitting unit and is connected to the isolation structure.

7. The display panel according to claim 1, characterized in that, The plurality of light-emitting units include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit with different light-emitting colors, and at least two of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit correspond to different thicknesses of the first conductive electronic layer.

8. The display panel according to claim 1, characterized in that, The pixel defining portion includes a first defining portion and a second defining portion that are sequentially stacked in a direction away from the substrate, and the groove extends at least from the top surface to the second defining portion.

9. The display panel according to claim 8, characterized in that, The thickness of the first defining part is greater than the thickness of the second defining part.

10. The display panel according to claim 8, characterized in that, The groove extends from the top surface via the first defining portion to the second defining portion, and the groove includes: The first groove segment is formed by recessing the surface of the first defined portion away from the substrate toward the substrate; The second slot is disposed through the second definition section, and the first slot and the second slot are interconnected.

11. The display panel according to claim 10, characterized in that, The materials of the first defining part and the second defining part are different, and the orthographic projection of the second groove segment on the substrate is located within the orthographic projection of the first groove segment on the substrate.

12. The display panel according to claim 11, characterized in that, The first defining portion includes a first side surface facing the first groove segment, and the second defining portion includes a second side surface facing the second groove segment, with at least a portion of the second side surface protruding from the first side surface toward the second groove segment.

13. The display panel according to claim 10, characterized in that, The pixel defining portion has a bottom surface facing the substrate, and the first defining portion includes a first sub-surface facing the pixel opening, the first sub-surface being located on the side of the first groove segment facing the substrate; The first defining portion has a first side surface facing the first groove segment. Wherein, the first sub-surface and the bottom surface are connected to each other and form a first included angle between the first sub-surface and the bottom surface, and form a second included angle between the extended surface of the first side surface and the extended surface of the bottom surface, wherein the first included angle is greater than the second included angle.

14. The display panel according to claim 13, characterized in that, The second defining portion includes a second side surface facing the second groove segment, and a third included angle is formed between the extended surface of the second side surface and the extended surface of the bottom surface, wherein the first included angle is greater than the third included angle.

15. The display panel according to claim 14, characterized in that, The second included angle and the third included angle are equal.

16. The display panel according to claim 14, characterized in that, The first defining part further includes a second sub-surface connected to the side of the first sub-surface away from the substrate, and a fourth included angle is formed between the extended surface of the second sub-surface and the bottom surface, wherein the first included angle is greater than the fourth included angle.

17. The display panel according to claim 16, characterized in that, The side surface of the first defining portion facing the pixel opening protrudes relative to the side surface of the second defining portion facing the pixel opening. The second defining portion facing the pixel opening has a third sub-surface. The extension surface of the third sub-surface and the bottom surface have a fifth included angle, and the first included angle is greater than the fifth included angle.

18. The display panel according to claim 17, characterized in that, The fifth included angle is equal to the third included angle.

19. The display panel according to claim 1, characterized in that, The first electrode further includes a second conductive sublayer and a third conductive sublayer sequentially disposed on the side of the first conductive sublayer facing the substrate. A portion of the second conductive sublayer is in contact with the first conductive sublayer, and another portion of the second conductive sublayer is located between the pixel defining portion and the substrate. The material of the first conductive sublayer includes a metal oxide, and the material of the second conductive sublayer includes a metal. The third conductive layer is disposed with its orthographic projection on the substrate overlapping the orthographic projection of the second conductive layer on the substrate, and the material of the third conductive layer includes metal oxide.

20. The display panel according to claim 19, characterized in that, A protective portion is provided between the second conductive electronic layer and the pixel defining portion, the protective portion being disposed around the pixel opening, and the material of the protective portion including an insulating material.

21. A method for manufacturing a display panel, characterized in that, include: A second conductive material layer is disposed on one side of the substrate, and the second conductive material layer is patterned to form multiple spaced second conductive sublayers. A pixel definition material layer is disposed on the side of the second conductive electronic layer away from the substrate, and the pixel definition material layer is patterned to form a pixel definition layer. The pixel definition layer includes a pixel defining portion and a pixel opening. A plurality of pixel openings are distributed in an array. The pixel defining portion has a top surface away from the substrate and a plurality of grooves recessed from the top surface into the substrate. The grooves are disposed around the corresponding portion of the pixel opening and have opposing first sidewalls and second sidewalls. The first sidewall is closer to the corresponding pixel opening than the second sidewall. A first conductive material layer is disposed on the side of the pixel definition layer away from the substrate, and the first conductive material layer is patterned to form a first conductive sublayer. The first conductive sublayer and the second conductive sublayer are combined to form a first electrode. The first conductive sublayer covers the sidewall of the pixel definition portion facing the pixel opening and part of the top surface. The first conductive sublayer includes a first end that is cut off from the first sidewall.

22. The preparation method according to claim 21, characterized in that, The step of forming a pixel definition layer by patterning the pixel definition material layer on the side of the second conductive sublayer facing away from the substrate includes: A first material layer and a second material layer are sequentially disposed on the side of the second conductive layer away from the substrate; The second material layer is patterned to form a through-hole second groove and a second sub-opening; The first material layer is patterned at a first longitudinal etching rate via the second groove segment and the second sub-opening to form a first groove segment and a first recess, wherein the first groove segment and the first groove segment are interconnected to form the groove. A covering portion is provided within the first and second slot sections; The first material layer is patterned at a second longitudinal etching rate through the second sub-aperture and the first recess to form a first sub-aperture that penetrates the first material layer. The first sub-aperture and the second sub-aperture are interconnected to form the pixel opening. The second longitudinal etching rate is greater than the first longitudinal etching rate.

23. The preparation method according to claim 22, characterized in that, In the step of patterning the second material layer to form a through second groove segment and a second sub-opening: the second material layer is patterned with a first lateral etching amount to form a through second groove segment and a second sub-opening; In the step of patterning the first material layer to form the first groove and the first depression via the second groove and the second sub-opening at a first longitudinal etching rate: the first material layer is patterned to form the first groove and the first depression at a second lateral etching amount, wherein the second lateral etching amount is greater than the first lateral etching amount.

24. A display device, characterized in that, Includes the display panel according to any one of claims 1-20, or the display panel prepared by the preparation method according to any one of claims 21-23.

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