Display panel and electronic equipment

Abstract

The embodiment of the invention provides a display panel and electronic equipment, and relates to the technical field of display, the display panel comprises a substrate, a pixel defining layer, an isolation structure and a plurality of light emitting units, the pixel defining layer is located on one side of the substrate, and a plurality of pixel openings are defined by the pixel defining layer; the isolation structure is located on the side, away from the substrate, of the pixel defining layer, a plurality of isolation openings are defined by the isolation structure, the isolation openings communicate with the corresponding pixel openings, at least part of the light-emitting unit is arranged on the side, away from the pixel defining layer, of the substrate, the light-emitting unit comprises a first electrode, and part of the first electrode is exposed out of the pixel openings; in the direction away from the substrate, the side, away from the substrate, of the pixel defining layer is provided with a plurality of steps connected in sequence, and at least part of the steps corresponds to the side wall of the first electrode. The first electrode is not easy to damage in the process of forming the display panel, so that the display effect of the display panel can be improved.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) and flat-panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages of high image quality, power saving, thin body and wide application range, becoming the mainstream in display panels. In the preparation process of traditional display panels, the graphicization of luminous pixels is usually achieved through a fine metal mask (FMM). FMM technology is mature and has rich experience in mass production. However, FMM technology also has problems such as limited accuracy, high development cost and long development cycle. The non-fine metal mask technology eliminates the limitations of traditional OLED processes on display screen size, resolution and other screen performance, and has the advantages of high performance, full-domain size and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A record relevant contents of the non-fine metal mask technology for reference.

[0003] However, there are still some problems with display panels that need to be solved urgently. Summary of the invention

[0004] In order to overcome the technical problems mentioned in the above technical background, an embodiment of the present application provides a display panel, wherein the display panel includes: substrate; A pixel defining layer, located on one side of the substrate, wherein the pixel defining layer defines a plurality of pixel openings; An isolation structure, located on a side of the pixel defining layer away from the substrate, the isolation structure encloses a plurality of isolation openings, and the isolation openings are connected to the corresponding pixel openings; A plurality of light-emitting units, at least part of which is disposed on a side of the substrate away from the pixel defining layer, the light-emitting unit comprising a first electrode, and the pixel opening exposes a part of the first electrode; Wherein, along a direction away from the substrate, a side of the pixel defining layer away from the substrate has a plurality of steps connected in sequence, and at least part of the plurality of steps corresponds to a side wall of the first electrode.

[0005] In some possible implementations, the display panel further includes: a padding layer, at least partially located between the substrate and the pixel defining layer, the padding layer comprising a plurality of padding portions arranged at intervals, the orthographic projection of the side wall of the padding portion away from the first electrode on the substrate being located outside the orthographic projection of the first electrode on the substrate, and the plurality of steps corresponding to the side wall of the first electrode and the side wall of the padding portion away from the first electrode; Preferably, an orthographic projection of a side wall of the elevated portion close to the first electrode on the substrate is located within an orthographic projection of the first electrode on the substrate.

[0006] In some possible implementations, in a cross section along the thickness direction of the display panel and passing through the centroid of the pixel opening, a distance between an orthographic projection of a side wall of the raised portion away from the first electrode on the substrate and an edge of the orthographic projection of the first electrode on the substrate is greater than or equal to 0.5 μm and less than or equal to 1.5 μm; Preferably, the first electrode includes a first plane and a second plane, the first plane is a side of the first electrode facing the substrate, the second plane is a side of the first electrode away from the substrate, and the sidewall connects the first plane and the second plane; Preferably, the isolation structure covers the plurality of steps.

[0007] In some possible implementations, the display panel further includes: A conductive layer, located on one side of the substrate, the conductive layer comprising a plurality of conductive traces arranged at intervals; an insulating layer, located on a side of the conductive layer away from the substrate, wherein a first via hole penetrating the insulating layer is provided on the insulating layer along a thickness direction of the substrate, and the first via hole exposes a portion corresponding to the conductive trace; a transfer layer, the transfer layer comprising a plurality of transfer portions arranged at intervals, at least a portion of the transfer portion being located in the first via hole and electrically connected to the conductive trace, and at least a portion of the transfer portion also extending to a side of the insulating layer away from the substrate; a filling layer, the filling layer comprising a plurality of filling parts arranged at intervals, the filling part being located on a side of the transition part away from the substrate and filling the first via hole, the first electrode being located on a side of the transition part and the filling part away from the substrate, and the first electrode being electrically connected to the transition part; Preferably, there is a gap between the orthographic projection of the elevated portion on the substrate and the orthographic projection of the transition portion on the substrate, or the orthographic projection of the substrate on the side of the elevated portion facing the transition portion overlaps with the edge of the orthographic projection of the transition portion on the substrate; or the side wall of the elevated portion close to the first electrode is within the range of the orthographic projection of the substrate and the orthographic projection of the transition portion on the substrate; Preferably, the raising portion and the adapter portion are connected; Preferably, the raised portion and the adapter portion are integrally formed; Preferably, along a direction away from the substrate, a height of any one of the plurality of steps is less than a sum of thicknesses of the first electrode and the transition portion; Preferably, the plurality of steps include a first step, and along a direction away from the substrate, a height of the first step is equal to a thickness of the raised portion; Preferably, the plurality of steps include a second step, the second step is connected to the first step, the second step is located on a side of the first step away from the substrate, and along a direction away from the substrate, a height of the second step is equal to a thickness of the first electrode; Preferably, the orthographic projection of the first via hole on the substrate is located within the orthographic projection of the isolation opening on the substrate; Preferably, the orthographic projection of the first via hole on the substrate is located within the orthographic projection of the pixel opening on the substrate; Preferably, in a cross section along the thickness direction of the display panel and passing through the centroid of the pixel opening, a distance between edges of orthographic projections of two adjacent first electrodes on the substrate is greater than or equal to 1.2 μm and less than or equal to 1.4 μm.

[0008] In some possible implementations, along a direction away from the substrate, a thickness of the raised portion is equal to a thickness of the transition portion; Preferably, the raised portion and the transition portion are made of the same layer and the same material; Preferably, the raising portion and the connecting portion are connected to each other; Preferably, along a direction away from the substrate, a thickness of the raised portion is greater than or equal to 100Å and less than or equal to 400Å.

[0009] In some possible implementations, the first electrode includes a first sub-electrode portion, a second sub-electrode portion, and a third sub-electrode portion stacked in sequence in a direction away from the substrate, and the first sub-electrode portion contacts the transition portion and the raised portion on a side facing the substrate; Preferably, the material of the first sub-electrode portion is the same as that of the transition portion and the padding portion; Preferably, the material of the raised portion includes indium tin oxide.

[0010] In some possible implementations, the transition portion includes a first transition sub-portion and a second transition sub-portion connected to each other, the first transition sub-portion is located on a side of the insulating layer away from the substrate, and the second transition sub-portion extends along the insulating layer toward the side wall of the first via hole into the first via hole to form a recessed structure and contact the conductive trace; Preferably, the distance from the side of the filling portion away from the substrate to the substrate is equal to the distance from the side of the first transfer sub-portion away from the substrate to the substrate; Preferably, a side of the filling portion away from the substrate is parallel to a plane of the substrate.

[0011] In some possible implementations, the orthographic projection of the first transfer sub-part on the substrate surrounds the orthographic projection of the second transfer sub-part on the substrate; Preferably, the material of the filling layer is the same as that of the insulating layer; Preferably, the material of the filling layer includes organic material.

[0012] In some possible implementations, the display panel further includes: A plurality of packaging units, wherein the packaging units are located on a side of the corresponding light-emitting unit away from the substrate, and a portion of the packaging unit extends from a side of the isolation structure toward the isolation opening to a side of the isolation structure away from the substrate; Preferably, the display panel further comprises a second encapsulation layer located on a side of the encapsulation unit away from the substrate and a third encapsulation layer located on a side of the second encapsulation layer away from the substrate; Preferably, the plurality of packaging units corresponding to the plurality of light-emitting units are arranged at intervals; Preferably, there is a gap between the packaging unit located on a side of the isolation structure away from the substrate and a side of the isolation structure away from the substrate; Preferably, the materials of the encapsulation unit and the third encapsulation layer both include inorganic materials; Preferably, the material of the second encapsulation layer includes organic material.

[0013] In some possible implementations, the isolation structure includes a first isolation portion and a second isolation portion which are sequentially stacked in a direction away from the substrate, and an orthographic projection of a side of the first isolation portion away from the substrate on the substrate is located within an orthographic projection of the second isolation portion on the substrate; Preferably, the light-emitting unit further comprises a light-emitting functional portion and a second electrode which are sequentially stacked in a direction away from the substrate, the light-emitting functional portion is located on a side of the first electrode away from the substrate, and the second electrode is electrically connected to the second isolation portion; Preferably, the isolation structure further comprises a third isolation portion located on a side of the first isolation portion facing the substrate, and the second electrode of the light-emitting unit is electrically connected to the third isolation portion; Preferably, the material of the third isolation portion includes molybdenum or titanium; and / or the material of the first isolation portion includes aluminum, silver or copper; and / or the material of the second isolation portion includes titanium or molybdenum.

[0014] In some possible implementations, the present application further provides a display panel, comprising: substrate; A raising layer, located at one side of the substrate, the raising layer comprising a plurality of raising parts arranged at intervals; A pixel defining layer, located on a side of the padding layer away from the substrate, the pixel defining layer defining a plurality of pixel openings; An isolation structure, located on a side of the pixel defining layer away from the substrate, the isolation structure encloses a plurality of isolation openings, and the isolation openings are connected to the corresponding pixel openings; A plurality of light-emitting units, at least part of which is disposed on a side of the substrate facing the pixel defining layer, the light-emitting unit comprises a first electrode, and the pixel opening exposes a part of the first electrode; The orthographic projection of the side wall of the elevated portion away from the first electrode on the substrate is outside the orthographic projection of the first electrode on the substrate, or the orthographic projection of the side wall of the elevated portion away from the first electrode on the substrate coincides with the edge of the orthographic projection of the first electrode on the substrate, and the orthographic projection of the side wall of the elevated portion close to the first electrode on the substrate is within the orthographic projection of the first electrode on the substrate.

[0015] In some possible implementations, the display panel further includes: A conductive layer, located between the substrate and the padding layer, the conductive layer comprising a plurality of conductive traces arranged at intervals; an insulating layer, located between the conductive layer and the padding layer, wherein along the thickness direction of the substrate, a first via hole penetrating the insulating layer is provided on the insulating layer, and the first via hole exposes a portion corresponding to the conductive trace; a transfer layer, the transfer layer comprising a plurality of transfer portions arranged at intervals, at least a portion of the transfer portion being located in the first via hole and electrically connected to the conductive trace, and at least a portion of the transfer portion also extending to a side of the insulating layer away from the substrate; a filling layer, the filling layer comprising a plurality of filling parts arranged at intervals, the filling part being located on a side of the transition part away from the substrate and filling the first via hole, the first electrode being located on a side of the transition part and the filling part away from the substrate, and the first electrode being electrically connected to the transition part; Preferably, the raising portion is connected to the adapter portion; Preferably, a distance between an orthographic projection of a side wall of the raised portion away from the first electrode on the substrate and an edge of the orthographic projection of the first electrode on the substrate is greater than or equal to 0.5 μm and less than or equal to 1.5 μm; Preferably, a distance between edges of orthographic projections of two adjacent first electrodes on the substrate is greater than or equal to 1.2 μm and less than or equal to 1.4 μm; Preferably, along a direction away from the substrate, a thickness of the raised portion is greater than or equal to 100Å and less than or equal to 400Å.

[0016] In some possible implementations, the present application further provides a method for preparing a display panel, the method comprising: providing a substrate; forming a first electrode on one side of the substrate; A pixel defining layer and an isolation structure located on a side of the pixel defining layer away from the substrate are formed on the side of the first electrode away from the substrate, wherein the pixel defining layer defines a plurality of pixel openings, and the isolation structure encloses a plurality of isolation openings, wherein the isolation openings are connected to the corresponding pixel openings; A light-emitting unit is formed, wherein at least a portion of the light-emitting unit is disposed on a side of the substrate facing the pixel defining layer, the light-emitting unit includes the first electrode, the pixel opening exposes a portion of the first electrode, and along a direction away from the substrate, a side of the pixel defining layer away from the substrate has a plurality of steps connected in sequence, and at least a portion of the plurality of steps corresponds to a side wall of the first electrode.

[0017] In some possible implementations, before the step of forming a first electrode on one side of the substrate, the method further includes: A raising layer is formed on one side of the substrate, the raising layer comprising a plurality of raising portions arranged at intervals, the orthographic projection of the side wall of the raising portion away from the first electrode on the substrate being outside the orthographic projection of the first electrode on the substrate, or the orthographic projection of the side wall of the raising portion away from the first electrode on the substrate coincides with an edge of the orthographic projection of the first electrode on the substrate, the orthographic projection of the side wall of the raising portion close to the first electrode on the substrate being within the orthographic projection of the first electrode on the substrate, and the plurality of steps correspond to the side wall of the first electrode and the raising portion.

[0018] In some possible implementations, the present application further provides an electronic device, which includes the display panel described in the present application, or includes a display panel prepared by the method for preparing the display panel described in the present application.

[0019] Compared with the prior art, this application has the following beneficial effects: A display panel and an electronic device provided by the present application can reduce the step difference of the pixel defining layer at the side wall of the first electrode by setting the pixel defining layer at the side wall of the first electrode to include multiple steps, making the pixel defining layer smoother at the first electrode, thereby making it less likely for cracks to form on the pixel defining layer at the side wall of the first electrode, and making it less likely for the first electrode to be damaged during the process of forming the display panel, thereby improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic cross-sectional view of a display panel provided in an embodiment of the present application; Figure 2 A partial top view schematic diagram of a display panel provided in an embodiment of the present application; Figure 3a Provided in the embodiments of this application Figure 2 One of the cross-sectional diagrams at AA in the middle; Figure 3b Provided in the embodiments of this application Figure 2 The second cross-sectional diagram at AA in the middle; Figure 4 Provided in the embodiments of this application Figure 2 The third cross-sectional diagram at AA in the middle; Figure 5 Provided in the embodiments of this application Figure 2 The fourth schematic diagram of the cross section at AA in the middle; Figure 6 Provided in the embodiments of this application Figure 2 The fifth cross-sectional diagram at AA in the middle; Figure 7 The display panel provided in the embodiment of the present application includes a cross-sectional schematic diagram of a first encapsulation layer; Figure 8 A cross-sectional schematic diagram of a display panel provided in an embodiment of the present application including a second encapsulation layer and a third encapsulation layer; Fig. 9 A schematic diagram of a process for preparing a display panel provided in an embodiment of the present application; Fig.10 A schematic cross-sectional view of forming a conductive layer and an insulating layer on one side of a substrate provided in an embodiment of the present application; Fig.11 A cross-sectional schematic diagram of forming a padding layer and a transfer layer on a side of the insulating layer away from the substrate provided in an embodiment of the present application; Fig.12 A cross-sectional schematic diagram of forming a filling layer on a side of a transition portion away from a substrate provided in an embodiment of the present application; Fig.13 The cross-sectional intention of forming a first electrode on a side of a filling portion, a transition portion, and a padding portion away from a substrate provided in an embodiment of the present application; Fig.14 The cross-sectional view of the embodiment of the present application provides a pixel defining layer formed on a side of the first electrode away from the substrate and an isolation structure located on a side of the pixel defining layer away from the substrate.

[0022] Figure numerals: 1. substrate; 2. pixel defining layer; 21. pixel opening; 3. isolation structure; 31. first isolation part; 32. second isolation part; 33. third isolation part; 4. first electrode; 41. first sub-electrode part; 42. second sub-electrode part; 43. third sub-electrode part; 5. light-emitting functional part; 6. second electrode; 7. light-emitting unit; 8. step; 81. first step; 82. second step; 9. isolation opening; 10. raised part; 11. insulating layer; 111. first via hole; 12. conductive trace; 13. filling part; 14. transfer part; 141. first transfer sub-part; 142. second transfer sub-part; 15. packaging unit; 16. second packaging layer; 17. third packaging layer. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invention product is usually placed when in use, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] It should be noted that, in the absence of conflict, different features in the embodiments of the present application may be combined with each other.

[0028] Improving the density of light-emitting units in a display panel (i.e., pixel density) is an important way to improve display effects. However, the display panels currently made using fine metal evaporation mask (FMM) technology cannot further increase the density of light-emitting units due to technical limitations. The inventors have found through long-term research that in order to solve the technical problem that the density of light-emitting units cannot be further increased, an isolation structure is set in some display panels. When the light-emitting layer and the second electrode are evaporated in the entire layer, the light-emitting layer and the second electrode can be disconnected at the isolation structure. Through multiple evaporation and multiple etching processes (i.e., light-emitting unit patterning), light-emitting units of different colors can be formed in different isolation openings.

[0029] The display panel in the related art includes a substrate, a pixel defining layer and an isolation structure stacked in sequence on one side of the substrate, and a light-emitting unit located in an isolation opening formed by the isolation structure. The light-emitting unit includes a first electrode, and the first electrode is located between the substrate and the pixel defining layer. Since the first electrode has a certain thickness in the direction away from the substrate, the pixel defining layer has a large step difference at the side wall of the first electrode, and the pixel defining layer is prone to cracks at the side wall of the first electrode. In the subsequent preparation process of the display panel, the etching solution is prone to invade the first electrode from the cracks in the pixel defining layer and damage the first electrode, thereby affecting the light-emitting effect of the corresponding light-emitting unit. In addition, water vapor is prone to invade the isolation structure through the cracks in the pixel defining layer, causing pitting on part of the film layer of the isolation structure.

[0030] In order to solve the above-mentioned technical problems, the inventor innovatively designed the following technical solutions, and the specific implementation solutions of the present application will be described in detail below in conjunction with the accompanying drawings. It should be noted that the defects existing in the solutions in the above-mentioned prior art are the results obtained by the inventor after practice and careful research. Therefore, the discovery process of the above-mentioned technical problems and the solutions proposed in this embodiment below for the above-mentioned problems should all be the contributions made by the inventor to the present application in the process of invention and creation, and should not be understood as the technical content known to those skilled in the art.

[0031] See also Figure 1 This embodiment provides a display panel, which includes a substrate 1, a pixel defining layer 2, an isolation structure 3 and a plurality of light-emitting units 7.

[0032] The pixel defining layer 2 is located on one side of the substrate 1 , and the pixel defining layer 2 defines a plurality of pixel openings 21 .

[0033] The isolation structure 3 is located on a side of the pixel defining layer 2 away from the substrate 1 . The isolation structure 3 encloses a plurality of isolation openings 9 . The isolation openings 9 are connected to corresponding pixel openings 21 .

[0034] At least part of the light emitting unit 7 is disposed on the side of the substrate 1 facing the pixel defining layer 2 , and the light emitting unit 7 includes a first electrode 4 , and the pixel opening 21 exposes part of the first electrode 4 . That is, at least part of the light emitting unit 7 is located in the pixel opening 21 .

[0035] In which, along the direction Z away from the substrate 1 , the side of the pixel defining layer 2 away from the substrate 1 has a plurality of steps 8 connected in sequence, and at least part of the plurality of steps 8 corresponds to the side wall of the first electrode 4 .

[0036] In the related art, cracks are generated in the pixel defining layer 2 at the side wall of the first electrode 4 .

[0037] In the present embodiment, the pixel defining layer 2 is configured to include a plurality of steps 8 at the side wall of the first electrode 4. Normally, the sum of the heights of at least some of the multiple steps 8 is equal to the height of the fault at the side wall of the first electrode 4, that is, the height of at least some of the multiple steps 8 is less than the height of the fault at the side wall of the first electrode 4. In this way, the height of a single step 8 among the multiple steps 8 can be reduced, that is, the fault of the pixel defining layer 2 at the side wall of the first electrode 4 can be reduced, so that the pixel defining layer 2 is smoother at the first electrode 4, so that the pixel defining layer 2 is not prone to cracks at the side wall of the first electrode 4, water vapor is not prone to penetrate the isolation structure 3 through the pixel defining layer 2, and it is not prone to cause pitting in some film layers in the isolation structure 3.

[0038] At the same time, since the pixel defining layer 2 has a better coverage effect on the first electrode 4, in the subsequent preparation process of the display panel, for example, in the process of patterning the isolation structure 3, the corresponding etching solution is not easy to invade the first electrode 4 through the pixel defining layer 2, and is not easy to damage the first electrode 4, so that it is not easy to cause the corresponding light-emitting unit 7 to produce dark spots, thereby improving the display effect of the display panel.

[0039] Based on the above design, this embodiment can reduce the step difference of the pixel defining layer 2 at the side wall of the first electrode 4 by setting the pixel defining layer 2 to include multiple steps 8 at the side wall of the first electrode 4, so that the pixel defining layer 2 is smoother at the first electrode 4, thereby making it less likely for cracks to form on the pixel defining layer 2 at the side wall of the first electrode 4, and the first electrode 4 is not easily damaged in the process of forming the display panel, thereby improving the display effect of the display panel.

[0040] For some possible implementations, see again Figure 1 The light-emitting unit 7 further includes a light-emitting functional portion 5 and a second electrode 6 which are sequentially stacked along a direction Z away from the substrate 1 . The light-emitting functional portion 5 is located on a side of the first electrode 4 away from the substrate 1 .

[0041] The setting of the isolation structure 3 enables the display panel to form film layers of light-emitting units of different colors in different isolation openings 9 without the need for a fine mask. Specifically, when forming a light-emitting material layer, the light-emitting material layer will be separated by the isolation structure 3 to form a plurality of light-emitting functional parts 5 arranged at intervals, and when forming a second electrode material layer, the second electrode material layer will be separated by the isolation structure 3 to form a plurality of second electrodes 6 arranged at intervals, the isolation structure 3 includes a conductive material, the second electrode 6 is electrically connected to the isolation structure 3, and a first electrode 4, a light-emitting functional part 5 and a second electrode 6 form a light-emitting unit 7. Among them, the first electrode 4 can be an anode, and the second electrode 6 can be a cathode.

[0042] In this way, different light-emitting units 7 can be made independent of each other, thereby improving the crosstalk between adjacent light-emitting units 7 and improving the display effect of the display panel. At the same time, due to the presence of the isolation structure 3, the light-emitting material layer and the second electrode material layer in the light-emitting unit 7 of each color in the display panel can be first prepared on the entire surface and then patterned, thereby eliminating the need for a fine mask, thereby saving the production cost of the display panel.

[0043] For some possible implementations, see Figure 2-Figure 3b The display panel also includes a raising layer, at least a part of which is located between the substrate 1 and the pixel defining layer 2, the raising layer includes a plurality of raised portions 10 arranged at intervals, the orthographic projection of a side of the raised portion 10 away from the first electrode 4 on the substrate 1 is located outside the orthographic projection of the first electrode 4 on the substrate 1, and a plurality of steps 8 correspond to the side wall of the first electrode 4 and the side of the raised portion 10 away from the first electrode 4, wherein “the side of the raised portion 10 away from the first electrode 4” refers to the side wall of the raised portion 10 away from the first electrode 4.

[0044] Optionally, the orthographic projection of one side of the raised portion 10 close to the first electrode 4 on the substrate 1 is located within the orthographic projection of the first electrode 4 on the substrate 1 , and “the side of the raised portion 10 close to the first electrode 4 ” refers to the side wall of the raised portion 10 close to the first electrode 4 .

[0045] Optionally, the first electrode 4 includes a first plane and a second plane, the first plane is a side of the first electrode 4 facing the substrate 1, the second plane is a side of the first electrode 4 away from the substrate 1, and the sidewall connects the first plane and the second plane.

[0046] Corresponding steps 8 are formed on the pixel defining layer 2 at positions corresponding to the raised portions 10 . Therefore, the steps 8 correspond to the sidewalls of the first electrode 4 and the side of the raised portion 10 away from the first electrode 4 .

[0047] In this embodiment, a raised portion 10 is provided under the side wall of the first electrode 4, so that the pixel defining layer 2 at the side wall of the first electrode 4 can be raised, the step difference of the pixel defining layer 2 at the side wall of the first electrode 4 can be reduced, and the pixel defining layer 2 at the side wall of the first electrode 4 can be made flatter, thereby preventing the pixel defining layer 2 from easily generating cracks at the side wall of the first electrode 4.

[0048] For some possible implementations, see again Figure 2 and Figure 3a The display panel also includes a conductive layer, an insulating layer 11, a transfer layer and a filling layer.

[0049] The conductive layer is located on one side of the substrate 1 , and includes a plurality of conductive traces 12 arranged at intervals.

[0050] The insulating layer 11 is located on a side of the conductive layer away from the substrate 1 . A first via hole 111 penetrating the insulating layer 11 is provided on the insulating layer 11 along the thickness direction Z of the substrate 1 . The first via hole 111 exposes a portion corresponding to the conductive trace 12 .

[0051] The transfer layer includes a plurality of transfer portions 14 arranged at intervals. At least a portion of the transfer portion 14 is located in the first via hole 111 and electrically connected to the conductive trace 12 . At least a portion of the transfer portion 14 also extends to a side of the insulating layer 11 away from the substrate 1 .

[0052] The filling layer includes a plurality of filling portions 13 arranged at intervals. The filling portion 13 is located on a side of the transition portion 14 away from the substrate 1 and fills the first via hole 111 . The first electrode 4 is located on a side of the transition portion 14 and the filling portion 13 away from the substrate 1 . The first electrode 4 is electrically connected to the transition portion 14 .

[0053] The display panel further includes a pixel circuit (not shown) located between the substrate 1 and the conductive trace 12 . The conductive trace 12 is electrically connected to both the pixel circuit and the first electrode 4 . Thus, a signal from the pixel circuit can be transmitted to the first electrode 4 via the conductive trace 12 .

[0054] The adapter 14 is electrically connected to both the conductive trace 12 and the first electrode 4. Therefore, the signal of the conductive trace 12 can be transmitted to the first electrode 4 through the adapter 14. The first electrode 4 is usually recessed toward the substrate 1 at the first via hole 111. In this embodiment, the recessed portion of the first electrode 4 at the first via hole 111 is filled by the filling portion 13, which can make the first electrode 4 flatter at the first via hole 111, thereby further improving the display effect of the display panel.

[0055] Optionally, the orthographic projection of the first via hole 111 on the substrate 1 is located within the orthographic projection of the isolation opening 9 on the substrate 1 .

[0056] Optionally, the orthographic projection of the first via hole 111 on the substrate 1 is located within the orthographic projection of the pixel opening 21 on the substrate 1 .

[0057] In the related art, if the first via hole 111 is set on the side of the isolation structure 3 close to the substrate 1, it is not easy to reduce the spacing between adjacent light-emitting units 7, which is not conducive to forming a display panel with a high pixel density; if the orthographic projection of the first via hole 111 on the substrate 1 is set to be located within the orthographic projection of the pixel opening 21 on the substrate 1, the first electrode 4 will be recessed toward the direction of the substrate 1 at the first via hole 111, and eventually the film layers such as the light-emitting functional part 5 and the second electrode 6 will also be recessed toward the direction of the substrate 1, thereby affecting the display effect and reliability of the display panel.

[0058] In this embodiment, the adapter 14 is electrically connected to the conductive trace 12 and the first electrode 4, and the filling portion 13 fills the recessed portion of the first electrode 4 at the first via hole 111, and the first via hole 111 is set to be located on the side of the pixel opening 21 close to the substrate 1. In this way, not only can the film layers such as the first electrode 4, the light-emitting functional portion 5 and the second electrode 6 be made flatter at the first via hole 111, but it is also more conducive to reducing the spacing between adjacent light-emitting units 7, thereby forming a display panel with a higher pixel density.

[0059] In the first embodiment, see again Figure 3a There is a gap between the orthographic projection of the elevated portion 10 on the substrate 1 and the orthographic projection of the transition portion 14 on the substrate 1 , and the orthographic projection of the side of the elevated portion 10 away from the first electrode 4 on the substrate 1 is located outside the orthographic projection of the first electrode 4 on the substrate 1 .

[0060] In the second embodiment, please refer again to Figure 3b There is a gap between the orthographic projection of the elevated portion 10 on the substrate 1 and the orthographic projection of the transition portion 14 on the substrate 1 , and the orthographic projection of the side of the elevated portion 10 away from the first electrode 4 on the substrate 1 coincides with the edge of the orthographic projection of the first electrode 4 on the substrate 1 .

[0061] In the third embodiment, please refer again to Figure 4 The orthographic projection of the side of the elevated portion 10 facing the transition portion 14 on the substrate 1 coincides with the edge of the orthographic projection of the transition portion 14 on the substrate 1 , and the orthographic projection of the side of the elevated portion 10 away from the first electrode 4 on the substrate 1 coincides with the edge of the orthographic projection of the first electrode 4 on the substrate 1 .

[0062] In the fourth embodiment, see Figure 5 The orthographic projection of the side of the elevated portion 10 facing the transition portion 14 on the substrate 1 coincides with the edge of the orthographic projection of the transition portion 14 on the substrate 1 , and the orthographic projection of the side of the elevated portion 10 away from the first electrode 4 on the substrate 1 is outside the orthographic projection of the first electrode 4 on the substrate 1 .

[0063] In the above four embodiments, along the direction Z away from the substrate 1 , the height of any one of the multiple steps 8 is less than the sum of the thicknesses of the first electrode 4 and the transition portion 14 .

[0064] Optionally, the plurality of steps 8 include a first step 81 , and along a direction Z away from the substrate 1 , a height H1 of the first step 81 is equal to a thickness H2 of the raised portion 10 .

[0065] Optionally, the multiple steps 8 include a second step 82 , which is connected to the first step 81 , and is located on a side of the first step 81 away from the substrate 1 . Along the direction Z away from the substrate 1 , a height H3 of the second step 82 is equal to a thickness H5 of the first electrode 4 .

[0066] In the related art, the pixel defining layer 2 forms only one step 8 at the side wall of the first electrode 4 , and the height of the step 8 is equal to the sum of the thicknesses of the first electrode 4 and the transition portion 14 .

[0067] In another embodiment, the raised portion 10 may also extend to a side of the transition portion 14 close to the substrate 1 , that is, the orthographic projection of the side wall of the raised portion 10 close to the first electrode 4 on the substrate 1 is located within the orthographic projection range of the transition portion 14 on the substrate 1 .

[0068] In this embodiment, the pixel defining layer 2 forms a first step 81 at the raised portion 10, and the first step 81 corresponds to the raised portion 10, so the height H1 of the first step 81 is equal to the thickness H2 of the raised portion 10. Since the orthographic projection of the side of the raised portion 10 close to the first electrode 4 on the substrate 1 is located within the orthographic projection of the first electrode 4 on the substrate 1, the raised portion 10 does not cover the side wall of the first electrode 4, and the pixel defining layer 2 forms a second step 82 at the side wall of the first electrode 4, and the second step 82 corresponds to the side wall of the first electrode 4, so the height H3 of the second step 82 is equal to the thickness H5 of the first electrode 4.

[0069] In this way, the step 8 whose original height is equal to the sum of the thicknesses of the first electrode 4 and the transition portion 14 is set to include a first step 81 and a second step 82, and the height of any one of the first step 81 and the second step 82 is less than the sum of the thicknesses of the first electrode 4 and the transition portion 14, thereby reducing the step difference of the pixel defining layer 2 at the side wall of the first electrode 4, making the pixel defining layer 2 smoother at the first electrode 4, and further making it less likely for the pixel defining layer 2 to generate cracks at the side wall of the first electrode 4.

[0070] Preferably, the isolation structure 3 covers a plurality of steps 8 .

[0071] Since the height of each step 8 among the multiple steps 8 is smaller than the height of the step formed by the pixel defining layer 2 at the side wall of the first electrode 4 in the related art, when the isolation structure 3 covers the multiple steps 8, the isolation structure 3 can be made more stable, and the isolation structure 3 can be made flatter at the multiple steps 8, thereby further improving the reliability of the display panel.

[0072] Preferably, see again Figure 3a In a cross section along the thickness direction of the display panel and passing through the centroid of the pixel opening 21, a distance D1 between the orthographic projection of the side of the raised portion 10 away from the first electrode 4 on the substrate 1 and an edge of the orthographic projection of the first electrode 4 on the substrate 1 is greater than or equal to 0.5 μm and less than or equal to 1.5 μm.

[0073] For example, the distance D1 can be 0.5μm, 0.7μm, 1μm, 1.2μm, 1.4μm or 1.5μm, etc. Reasonable setting of the distance D1 can not only reduce the step difference of the pixel defining layer 2 at the side wall of the first electrode 4, but also reduce the spacing between adjacent light-emitting units 7, thereby being more conducive to improving the pixel density of the display panel.

[0074] Optionally, see again Figure 3a In a cross section along the thickness direction of the display panel and passing through the centroid of the pixel opening 21 , a distance D2 between edges of orthographic projections of two adjacent first electrodes 4 on the substrate 1 is greater than or equal to 1.2 μm and less than or equal to 1.4 μm.

[0075] For example, the distance D2 may be 1.2 μm, 1.3 μm or 1.4 μm. Reasonable setting of the distance D2 may reduce the spacing between adjacent light emitting units 7 , thereby being more conducive to improving the pixel density of the display panel.

[0076] For some possible implementations, see again Figure 4 , along the direction Z away from the substrate 1 , the thickness of the raised portion 10 is equal to the thickness of the transition portion 14 .

[0077] Optionally, the raised portion 10 and the transition portion 14 are made of the same layer and the same material.

[0078] In this embodiment, the raised portion 10 is formed while the transfer portion 14 is formed. Thus, there is no need to set up a special process to form the raised portion 10 , thereby reducing the process cost of forming the raised portion 10 .

[0079] Optionally, see again Figure 5 The raising portion 10 and the connecting portion 14 are connected to each other.

[0080] In this embodiment, the raising portion 10 and the transition portion 14 can be regarded as a whole, so the orthographic projection of the first electrode 4 on the substrate 1 is located in the figure composed of the orthographic projections of the raising portion 10 and the transition portion 14 on the substrate 1, and the area of ​​the orthographic projection of the first electrode 4 on the substrate 1 is smaller than the area of ​​the figure composed of the orthographic projections of the raising portion 10 and the transition portion 14 on the substrate 1.

[0081] The raised portion 10 and the adapter portion 14 are integrally formed, and there is no gap between the raised portion 10 and the adapter portion 14. The signal of the first wiring is transmitted to the first electrode 4 through the adapter portion 14 and the raised portion 10. This is not only more conducive to transmitting the signal of the first electrode 4, but also can make the first electrode 4 flatter.

[0082] Preferably, see again Figure 4, along the direction Z away from the substrate 1, the thickness H2 of the raised portion 10 is greater than or equal to 100Å and less than or equal to 400Å. For example, the thickness H2 may be 100Å, 150Å, 200Å, 250Å, 300Å, 350Å or 400Å, etc., and the thickness H2 may be reasonably set, so that the height H1 of the first step 81 may be reasonably set without increasing the thickness of the display panel too much.

[0083] For some possible implementations, see Figure 6 The first electrode 4 includes a first sub-electrode portion 41, a second sub-electrode portion 42 and a third sub-electrode portion 43 which are stacked in sequence along a direction Z away from the substrate 1, and the first sub-electrode portion 41 contacts the transition portion 14, the raised portion 10 and the filling portion 13 on the side facing the substrate 1.

[0084] Optionally, the material of the first sub-electrode portion 41 is the same as the material of the transition portion 14 and the padding portion 10 .

[0085] Optionally, the material of the raised portion 10 includes indium tin oxide.

[0086] Generally speaking, the bonding effect of two film layers made of the same material is better than that of two film layers made of different materials. In this embodiment, the material of the first sub-electrode portion 41 is set to be the same as the material of the transition portion 14 and the raised portion 10, and the side of the first sub-electrode portion 41 facing the substrate 1 is set to be in contact with the transition portion 14, the raised portion 10 and the filling portion 13. This can improve the adhesion between the first sub-electrode and the raised portion 10 and the filling portion 13, thereby improving the stability of the first electrode 4.

[0087] For some possible implementations, see again Figure 6 The transfer portion 14 includes a first transfer sub-portion 141 and a second transfer sub-portion 142 which are connected to each other. The first transfer sub-portion 141 is located on a side of the insulating layer 11 away from the substrate 1 . The second transfer sub-portion 142 extends along the insulating layer 11 toward the side wall of the first via hole 111 to form a recessed structure in the first via hole 111 and contacts the conductive trace 12 .

[0088] Optionally, the distance between the side of the filling portion 13 away from the substrate 1 and the substrate 1 is equal to the distance between the side of the first transfer sub-portion 141 away from the substrate 1 and the substrate 1 .

[0089] Optionally, a side of the filling portion 13 away from the substrate 1 is a plane parallel to the substrate 1 .

[0090] Optionally, the orthographic projection of the first transfer sub-portion 141 on the substrate 1 surrounds the orthographic projection of the second transfer sub-portion 142 on the substrate 1 .

[0091] Thus, the filling portion 13 and the first adapter portion 141 and the side of the raised portion 10 away from the substrate 1 are located on the same plane parallel to the substrate 1 , which can further improve the flatness of the first electrode 4 , thereby further improving the display effect and performance of the display panel.

[0092] Preferably, the material of the filling layer is the same as that of the insulating layer 11 .

[0093] Optionally, the material of the filling layer includes organic material.

[0094] The materials of the filling layer and the insulating layer 11 are both organic materials, and the insulating layer 11 can be a planarization layer, so that it is easier to form the filling layer and to make the side of the filling portion 13 away from the substrate 1 a flat surface.

[0095] For some possible implementations, see Figure 7 The display panel further includes a plurality of packaging units 15 , which are located on a side of the corresponding light emitting unit 7 away from the substrate 1 , and a portion of the packaging unit 15 extends from the side of the isolation structure 3 toward the isolation opening 9 to a side of the isolation structure 3 away from the substrate 1 .

[0096] Optionally, the multiple encapsulation units 15 corresponding to the multiple light-emitting units 7 are arranged at intervals.

[0097] Optionally, a gap exists between the encapsulation unit 15 located on the side of the isolation structure 3 away from the substrate 1 and the side of the isolation structure 3 away from the substrate 1 .

[0098] During the patterning process of the light-emitting unit 7 , the first packaging material layer is disconnected at the isolation structure 3 to form the packaging unit 15 . The packaging unit 15 can completely and independently package the corresponding light-emitting unit 7 , thereby improving the display characteristics of the display panel.

[0099] Preferably, see Figure 8 The display panel further includes a second encapsulation layer 16 located on a side of the encapsulation unit 15 away from the substrate 1 and a third encapsulation layer 17 located on a side of the second encapsulation layer 16 away from the substrate 1 .

[0100] Optionally, the materials of the encapsulation unit 15 and the third encapsulation layer 17 both include inorganic materials, and the material of the second encapsulation layer 16 includes organic materials.

[0101] For example, the encapsulation unit 15 and the third encapsulation layer 17 can be formed by chemical vapor deposition (CVD), and the second encapsulation layer 16 can be formed by inkjet printing (IJP). The second encapsulation layer 16 and the third encapsulation layer 17 can provide a better encapsulation effect on the light-emitting unit 7, thereby further improving the encapsulation quality of the display panel.

[0102] For some possible implementations, see again Figure 7 The isolation structure 3 includes a first isolation portion 31 and a second isolation portion 32 which are stacked in sequence along a direction Z away from the substrate 1 , and the orthographic projection of the side of the first isolation portion 31 away from the substrate 1 on the substrate 1 is located within the orthographic projection of the second isolation portion 32 on the substrate 1 .

[0103] Since the second isolation portion 32 is located on the side of the first isolation portion 31 away from the substrate 1, and the lateral width of the second isolation portion 32 is greater than the lateral width of the first isolation portion 31 in a plane parallel to the substrate 1, the second isolation portion 32 disconnects the light-emitting material layer and the second electrode material layer at the isolation structure 3. In this way, the isolation structure 3 formed by the first isolation portion 31 and the second isolation portion 32 can make it easier to independently package each light-emitting unit 7, thereby improving the packaging yield of the display panel.

[0104] Please see again Figure 7 , the second electrode 6 is electrically connected to the second isolation portion 32; the first isolation portion 31 includes a conductive material, and the second electrode 6 corresponding to the light-emitting unit 7 extends to contact the side wall of the first isolation portion 31 to achieve electrical connection between the second electrode 6 corresponding to the light-emitting unit 7 and the first isolation portion 31.

[0105] Please see again Figure 8 The isolation structure 3 further includes a third isolation portion 33 located on a side of the first isolation portion 31 facing the substrate 1 , and the second electrode 6 of the light emitting unit 7 is electrically connected to the third isolation portion 33 .

[0106] Optionally, the material of the third isolation portion 33 includes molybdenum or titanium; and / or the material of the first isolation portion 31 includes aluminum, silver or copper; and / or the material of the second isolation portion 32 includes titanium or molybdenum.

[0107] The third isolation portion 33 includes a conductive material, and the second electrode 6 corresponding to the light emitting unit 7 extends to contact the side wall of the third isolation portion 33 to achieve electrical connection between the second electrode 6 corresponding to the light emitting unit 7 and the third isolation portion 33 .

[0108] Optionally, the orthographic projection of the light emitting functional part 5 on the substrate 1 is located outside the orthographic projection of the third isolation part 33 on the substrate 1. In this way, the light emitting functional part 5 does not overlap with the isolation structure 3, thereby effectively improving the crosstalk problem between the light emitting units 7.

[0109] In the related art, water vapor easily intrudes into the first isolation portion 31 through cracks in the pixel definition layer 2 at the side wall of the first electrode 4 , causing pitting in the first isolation portion 31 .

[0110] The present application can make it difficult for the pixel defining layer 2 to generate cracks at the side wall of the first electrode 4 through the above-mentioned method, thereby effectively improving the problem of pitting on the first isolation portion 31 .

[0111] For some possible implementations, see again Figure 2-Figure 4 The present application also provides another display panel, which includes a substrate 1, a cushioning layer, a pixel defining layer 2, an isolation structure 3 and a plurality of light-emitting units 7.

[0112] The raising layer is located on one side of the substrate 1 , and includes a plurality of raising portions 10 that are spaced apart.

[0113] The pixel defining layer 2 is located at a side of the raised layer away from the substrate 1 , and the pixel defining layer 2 defines a plurality of pixel openings 21 .

[0114] The isolation structure 3 is located on a side of the pixel defining layer 2 away from the substrate 1 . The isolation structure 3 encloses a plurality of isolation openings 9 . The isolation openings 9 are connected to corresponding pixel openings 21 .

[0115] At least a portion of the light emitting unit 7 is located in the isolation opening 9 . The light emitting unit 7 includes a first electrode 4 . The pixel opening 21 exposes a portion of the first electrode 4 .

[0116] Among them, the orthographic projection of the side of the elevated portion 10 away from the first electrode 4 on the substrate 1 is located outside the orthographic projection of the first electrode 4 on the substrate 1, or the orthographic projection of the side of the elevated portion 10 away from the first electrode 4 on the substrate 1 coincides with the edge of the orthographic projection of the first electrode 4 on the substrate 1, and the orthographic projection of the side of the elevated portion 10 close to the first electrode 4 on the substrate 1 is located within the orthographic projection of the first electrode 4 on the substrate 1.

[0117] In the related art, cracks are easily generated on the sidewalls of the pixel defining layer 2 and the sidewalls of the first electrode 4 .

[0118] In this embodiment, a raised portion 10 is provided below the side wall of the first electrode 4 to avoid the formation of a concave structure below the first electrode 4, thereby reducing the step difference of the pixel defining layer 2 at the side wall of the first electrode 4, making the pixel defining layer 2 smoother at the first electrode 4, thereby making it less likely for cracks to form on the pixel defining layer 2 at the side wall of the first electrode 4, making it less likely for water vapor to penetrate into the isolation structure 3 through the pixel defining layer 2, and making it less likely for pitting to form on some film layers in the isolation structure 3.

[0119] At the same time, since the pixel defining layer 2 has a better coverage effect on the first electrode 4, in the subsequent preparation process of the display panel, for example, in the process of patterning the isolation structure 3, the corresponding etching solution is not easy to invade the first electrode 4 through the pixel defining layer 2, and is not easy to damage the first electrode 4, so that it is not easy to cause the corresponding light-emitting unit 7 to produce dark spots, thereby improving the display effect of the display panel.

[0120] The remaining technical solutions of the display panel in this embodiment are the same as those of the display panel in the above embodiment, and will not be described again.

[0121] For some possible implementations, see Figure 1 and Fig. 9 The present application also provides a method for preparing a display panel, the method comprising: S10: providing a substrate 1.

[0122] S11 : forming a first electrode 4 on one side of the substrate 1 .

[0123] S12: A pixel defining layer 2 and an isolation structure 3 located on a side of the pixel defining layer 2 away from the substrate 1 are formed on the side of the first electrode 4 away from the substrate 1, the pixel defining layer 2 defines a plurality of pixel openings 21, the isolation structure 3 encloses a plurality of isolation openings 9, and the isolation openings 9 are connected to the corresponding pixel openings 21.

[0124] S13: A light-emitting unit 7 is formed, wherein at least a portion of the light-emitting unit 7 is disposed on a side of the substrate 1 facing the pixel defining layer 2, the light-emitting unit 7 includes a first electrode 4, a pixel opening 21 exposes a portion of the first electrode 4, and along a direction Z away from the substrate 1, a side of the pixel defining layer 2 away from the substrate 1 has a plurality of steps 8 connected in sequence, and at least a portion of the plurality of steps 8 corresponds to a side wall of the first electrode 4.

[0125] In the display panel formed by the above method, the pixel defining layer 2 forms a plurality of steps 8 at the side wall of the first electrode 4, which can reduce the height of a single step 8 among the plurality of steps 8, that is, the step difference of the pixel defining layer 2 at the side wall of the first electrode 4 can be reduced, so that the pixel defining layer 2 is smoother at the first electrode 4, thereby making it less likely for cracks to form on the pixel defining layer 2 at the side wall of the first electrode 4, and less likely for water vapor to penetrate into the isolation structure 3 through the pixel defining layer 2, and less likely for pitting to form on some film layers in the isolation structure 3.

[0126] At the same time, since the pixel defining layer 2 has a better coverage effect on the first electrode 4, in the subsequent preparation process of the display panel, for example, in the process of patterning the isolation structure 3, the corresponding etching solution is not easy to invade the first electrode 4 through the pixel defining layer 2, and is not easy to damage the first electrode 4, so that it is not easy to cause the corresponding light-emitting unit 7 to produce dark spots, thereby improving the display effect of the display panel.

[0127] In some possible implementations, before the step of forming the first electrode 4 on one side of the substrate 1, the step further includes: See also Fig.10 A conductive layer and an insulating layer 11 are formed on one side of the substrate 1 , the conductive layer includes a plurality of conductive traces 12 arranged at intervals, and a first via hole 111 is provided on the insulating layer 11 , and the first via hole 111 exposes a portion of the conductive trace 12 .

[0128] See also Fig.11 A raising layer and a transfer layer are formed on the side of the insulating layer 11 away from the substrate 1. The raising layer and the transfer layer are arranged on the same layer. The raising layer includes a plurality of raising portions 10 arranged at intervals. The transfer layer includes a plurality of transfer portions 14 arranged at intervals. The raising portions 10 and the transfer portions 14 can be electrically connected. At least a portion of the transfer portion 14 is located in the first via 111 and is electrically connected to the conductive trace 12. At least a portion of the transfer portion 14 also extends to the side of the insulating layer 11 away from the substrate 1.

[0129] A raising layer is formed on one side of the substrate 1, and the raising layer includes a plurality of raising portions 10 arranged at intervals, wherein the orthographic projection of the side of the raising portion 10 away from the first electrode 4 on the substrate 1 is outside the orthographic projection of the first electrode 4 on the substrate 1, or the orthographic projection of the side of the raising portion 10 away from the first electrode 4 on the substrate 1 coincides with the edge of the orthographic projection of the first electrode 4 on the substrate 1, and the orthographic projection of the side of the raising portion 10 close to the first electrode 4 on the substrate 1 is within the orthographic projection of the first electrode 4 on the substrate 1, and the plurality of steps 8 correspond to the side wall of the first electrode 4 and the raising portion 10.

[0130] See also Fig.12A filling layer is formed on the side of the transition portion 14 away from the substrate 1 , the filling layer includes a plurality of filling portions 13 arranged at intervals, the filling portions 13 are located on the side of the transition portion 14 away from the substrate 1 and fill the first via hole 111 .

[0131] See also Fig.13 A first electrode 4 is formed on the side of the filling portion 13 , the transition portion 14 and the raised portion 10 away from the substrate 1 , and the first electrode 4 is electrically connected to the transition portion 14 .

[0132] After the step of forming the first electrode 4 on one side of the substrate 1, the method further includes: See also Fig.14 A pixel defining layer 2 and an isolation structure 3 located on the side of the pixel defining layer 2 away from the substrate 1 are formed on the side of the first electrode 4 away from the substrate 1. The pixel defining layer 2 defines a plurality of pixel openings 21. The isolation structure 3 encloses a plurality of isolation openings 9, and the isolation openings 9 are connected to the corresponding pixel openings 21. The pixel defining layer 2 generates a corresponding step 8 at the position corresponding to the raised portion 10.

[0133] Please see again Figure 7 , forming a light emitting unit 7 and a packaging unit 15 located on a side of the light emitting unit 7 away from the substrate 1 , wherein at least a portion of the light emitting unit 7 is located in the isolation opening 9 .

[0134] In this embodiment, the above method can form a raised portion 10 at the side wall of the first electrode 4. The raised portion 10 can raise the pixel defining layer 2 at the side wall of the first electrode 4. The raised portion 10 can form a plurality of steps 8 in the pixel defining layer 2 at the side wall of the first electrode 4, thereby reducing the step difference of the pixel defining layer 2 at the side wall of the first electrode 4, making the pixel defining layer 2 smoother at the first electrode 4, and making it less likely for the pixel defining layer 2 to form cracks at the side wall of the first electrode 4.

[0135] In some possible implementations, the present application further provides an electronic device, the electronic device comprising the display panel of the present application, or comprising a display panel prepared by the method for preparing a display panel of the present application. The electronic device may include a device with image processing capabilities, such as a server, a personal computer, a laptop computer, a mobile phone, a tablet computer, a wearable device, a vehicle-mounted display device, etc. Since the electronic device comprises the display panel of the present application, the display effect of the electronic device is better.

[0136] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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.

[0137] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: The display panel comprises: substrate; A pixel defining layer, located on one side of the substrate, wherein the pixel defining layer defines a plurality of pixel openings; An isolation structure, located on a side of the pixel defining layer away from the substrate, the isolation structure encloses a plurality of isolation openings, and the isolation openings are connected to the corresponding pixel openings; A plurality of light-emitting units, at least part of which is disposed on a side of the substrate facing the pixel defining layer, the light-emitting unit comprises a first electrode, and the pixel opening exposes a part of the first electrode; Wherein, along a direction away from the substrate, a side of the pixel defining layer away from the substrate has a plurality of steps connected in sequence, and at least part of the plurality of steps corresponds to a side wall of the first electrode.

2. The display panel according to claim 1, characterized in that: The display panel further includes: A raising layer is at least partially located between the substrate and the pixel defining layer, the raising layer includes a plurality of raising portions arranged at intervals, the orthographic projection of the side wall of the raising portion away from the first electrode on the substrate is located outside the orthographic projection of the first electrode on the substrate, the orthographic projection of the side wall of the raising portion close to the first electrode on the substrate is located within the orthographic projection of the first electrode on the substrate, and the plurality of steps correspond to the side wall of the first electrode and the side wall of the raising portion away from the first electrode.

3. The display panel according to claim 2, characterized in that: In a cross section along the thickness direction of the display panel and passing through the centroid of the pixel opening, a distance between an orthographic projection of a side wall of the raised portion away from the first electrode on the substrate and an edge of the orthographic projection of the first electrode on the substrate is greater than or equal to 0.5 μm and less than or equal to 1.5 μm; Alternatively, the isolation structure covers the plurality of steps.

4. The display panel according to claim 2, characterized in that: The display panel further includes: A conductive layer, located on one side of the substrate, the conductive layer comprising a plurality of conductive traces arranged at intervals; an insulating layer, located on a side of the conductive layer away from the substrate, wherein a first via hole penetrating the insulating layer is provided on the insulating layer along a thickness direction of the substrate, and the first via hole exposes a portion corresponding to the conductive trace; a transfer layer, the transfer layer comprising a plurality of transfer portions arranged at intervals, at least a portion of the transfer portion being located in the first via hole and electrically connected to the conductive trace, and at least a portion of the transfer portion also extending to a side of the insulating layer away from the substrate; a filling layer, the filling layer comprising a plurality of filling parts arranged at intervals, the filling part being located on a side of the transition part away from the substrate and filling the first via hole, the first electrode being located on a side of the transition part and the filling part away from the substrate, and the first electrode being electrically connected to the transition part; There is a gap between the orthographic projection of the raised portion on the substrate and the orthographic projection of the transition portion on the substrate. Alternatively, the orthographic projection of the side of the raised portion facing the transition portion on the substrate coincides with the edge of the orthographic projection of the transition portion on the substrate. Alternatively, a side wall of the raised portion close to the first electrode is within the orthographic projection of the substrate and the transition portion is within the orthographic projection of the substrate.

5. The display panel according to claim 4, characterized in that: The raised portion and the adapter portion are integrally formed; Alternatively, along a direction away from the substrate, a height of any one of the plurality of steps is less than a sum of thicknesses of the first electrode and the transition portion; Alternatively, the plurality of steps include a first step, and along a direction away from the substrate, a height of the first step is equal to a thickness of the raised portion; Alternatively, the plurality of steps include a first step, the height of which along a direction away from the substrate is equal to the thickness of the raised portion, and the plurality of steps include a second step, the second step is connected to the first step, the second step is located on a side of the first step away from the substrate, and the height of the second step along a direction away from the substrate is equal to the thickness of the first electrode; Alternatively, the orthographic projection of the first via hole on the substrate is located within the orthographic projection of the isolation opening on the substrate; or, the orthographic projection of the first via hole on the substrate is located within the orthographic projection of the pixel opening on the substrate; Alternatively, in a cross section along the thickness direction of the display panel and passing through the centroid of the pixel opening, a distance between edges of orthographic projections of two adjacent first electrodes on the substrate is greater than or equal to 1.2 μm and less than or equal to 1.4 μm.

6. The display panel according to claim 4, characterized in that: Along a direction away from the substrate, the thickness of the raised portion is equal to the thickness of the transition portion; Alternatively, the raised portion and the transition portion are formed in the same layer and the same material; Alternatively, along a direction away from the substrate, the thickness of the raised portion is greater than or equal to 100Å and less than or equal to 400Å.

7. The display panel according to claim 4, characterized in that: The first electrode includes a first sub-electrode portion, a second sub-electrode portion and a third sub-electrode portion which are sequentially stacked in a direction away from the substrate, and the first sub-electrode portion contacts the transfer portion and the raised portion on a side facing the substrate.

8. The display panel according to claim 7, characterized in that: The material of the first sub-electrode portion is the same as that of the transition portion and the padding portion; Alternatively, the material of the raised portion includes indium tin oxide.

9. The display panel according to claim 4, characterized in that: The transfer portion comprises a first transfer sub-portion and a second transfer sub-portion connected to each other, the first transfer sub-portion is located on a side of the insulating layer away from the substrate, and the second transfer sub-portion extends along the insulating layer toward the side wall of the first via hole to form a recessed structure in the first via hole and contacts the conductive trace; Alternatively, the distance from the side of the filling portion away from the substrate to the substrate is equal to the distance from the side of the first transfer sub-portion away from the substrate to the substrate; Alternatively, a side of the filling portion away from the substrate is parallel to a plane of the substrate.

10. The display panel according to claim 9, characterized in that: An orthographic projection of the first transfer sub-portion on the substrate surrounds an orthographic projection of the second transfer sub-portion on the substrate.

11. The display panel according to any one of claims 1 to 10, characterized in that: The isolation structure includes a first isolation portion and a second isolation portion which are stacked in sequence in a direction away from the substrate, wherein the orthographic projection of a side of the first isolation portion away from the substrate on the substrate is located within the orthographic projection of the second isolation portion on the substrate.

12. A display panel, characterized in that: The display panel comprises: substrate; A raising layer, located at one side of the substrate, the raising layer comprising a plurality of raising parts arranged at intervals; A pixel defining layer, located on a side of the padding layer away from the substrate, the pixel defining layer defining a plurality of pixel openings; An isolation structure, located on a side of the pixel defining layer away from the substrate, the isolation structure encloses a plurality of isolation openings, and the isolation openings are connected to the corresponding pixel openings; A plurality of light-emitting units, at least part of which is disposed on a side of the substrate facing the pixel defining layer, the light-emitting unit comprises a first electrode, and the pixel opening exposes a part of the first electrode; The orthographic projection of the side wall of the elevated portion away from the first electrode on the substrate is outside the orthographic projection of the first electrode on the substrate, or the orthographic projection of the side wall of the elevated portion away from the first electrode on the substrate coincides with the edge of the orthographic projection of the first electrode on the substrate, and the orthographic projection of the side wall of the elevated portion close to the first electrode on the substrate is within the orthographic projection of the first electrode on the substrate.

13. The display panel according to claim 12, characterized in that: The display panel further includes: A conductive layer, located between the substrate and the padding layer, the conductive layer comprising a plurality of conductive traces arranged at intervals; an insulating layer, located between the conductive layer and the padding layer, wherein along the thickness direction of the substrate, a first via hole penetrating the insulating layer is provided on the insulating layer, and the first via hole exposes a portion corresponding to the conductive trace; a transfer layer, the transfer layer comprising a plurality of transfer portions arranged at intervals, at least a portion of the transfer portion being located in the first via hole and electrically connected to the conductive trace, and at least a portion of the transfer portion also extending to a side of the insulating layer away from the substrate; A filling layer, the filling layer comprising a plurality of filling parts arranged at intervals, the filling part being located on a side of the transition part away from the substrate and filling the first via hole, the first electrode being located on a side of the transition part and the filling part away from the substrate, the first electrode being electrically connected to the transition part.

14. The display panel according to claim 13, characterized in that: The raising portion is connected to the adapter portion; Alternatively, a distance between an orthographic projection of a side wall of the raised portion away from the first electrode on the substrate and an edge of the orthographic projection of the first electrode on the substrate is greater than or equal to 0.5 μm and less than or equal to 1.5 μm; Alternatively, a distance between edges of orthographic projections of two adjacent first electrodes on the substrate is greater than or equal to 1.2 μm and less than or equal to 1.4 μm; Alternatively, along a direction away from the substrate, the thickness of the raised portion is greater than or equal to 100Å and less than or equal to 400Å.

15. An electronic device, characterized in that: The electronic device comprises the display panel according to any one of claims 1 to 14.

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