Display panel, display apparatus and manufacturing method for display panel

Abstract

A display panel, a display apparatus and a manufacturing method for the display panel, relating to the technical field of display. The display panel comprises a back plate (1); a planarization layer (2) is arranged on the back plate (1), and the planarization layer (2) is provided with a pixel defining layer arrangement area; the pixel defining layer arrangement area comprises lyophilic areas (B) and lyophobic areas (A), and the lyophilic areas (B) and the lyophobic areas (A) are arranged in a criss-cross manner; recesses (21) are formed at the positions of the planarization layer (2) where the lyophilic areas (B) are located, lyophilic pixel defining layers (3) being arranged in the recesses (21); and the lyophobic areas (A) are provided with lyophobic pixel defining layers (4).

Description

Display panel, display device, and display panel manufacturing method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to a Chinese patent application filed with the Patent Office of China on June 13, 2023, with application number 202310701514.9 and titled “Display Panel, Display Device, and Display Panel Preparation Method,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure generally relates to the field of display technology, and more particularly to a display panel, a display device, and a method for manufacturing a display panel. Background Art

[0004] Organic light-emitting diode (OLED) film formation methods primarily include evaporation and solution processes. Currently, evaporation technology has been applied in mass production, but its materials are expensive and have low material utilization, increasing product development costs. Solution-based OLED film formation methods primarily include inkjet printing, nozzle coating, spin coating, and screen printing.

[0005] Overview

[0006] Provided are a display panel, a display device, and a method for manufacturing a display panel.

[0007] In a first aspect, a display panel is provided, comprising a backplane, wherein a flat layer is provided on the backplane; and

[0008] A pixel definition layer setting area is provided on the flat layer, and the pixel definition layer setting area includes a lyophilic area and a lyophobic area. The lyophilic area and the lyophobic area are arranged in a crisscross pattern. The flat layer is provided with a groove at the location of the lyophilic area, and a lyophilic pixel definition layer is provided in the groove. The lyophobic area is provided with a lyophobic pixel definition layer.

[0009] As an achievable manner, the orthographic projection of the groove on the backplane is not smaller than the set orthographic projection of the lyophilic pixel defining layer on the backplane.

[0010] As an achievable manner, the lyophilic pixel defining layer is arranged higher than the planar layer.

[0011] As an achievable manner, the height of the lyophilic pixel defining layer above the planar layer is H1, wherein 0.6 μm ≥ H1 ≥ 0.3 μm.

[0012] As an achievable manner, the liquid-phobic pixel defining layer forms a channel for ink to flow.

[0013] As an achievable manner, the lyophilic pixel defining layer is set to have a thickness of H2, wherein 3 μm ≥ H2 ≥ 2 μm.

[0014] As a feasible manner, pixel electrodes are provided between adjacent lyophilic areas and adjacent lyophobic areas.

[0015] As an achievable manner, the thickness of the liquid-phobic pixel defining layer is H3, wherein 1.5 μm ≥ H3 ≥ 1 μm.

[0016] As an achievable manner, the depth of the groove of the planar layer is H2 - H1.

[0017] As a feasible method, the liquid-phobic pixel defining layer includes a plurality of first parts arranged along a first direction, and at least two second parts arranged along a second direction, and a through area is formed between adjacent first parts, and the through area is used to accommodate ink droplets, wherein the first direction and the second direction are not parallel.

[0018] As an achievable manner, the lyophilic pixel defining layer is disposed in the through-region.

[0019] As an achievable manner, the lyophilic pixel defining layer extends along the second direction.

[0020] As an achievable manner, the height of the liquid-phobic pixel defining layer is higher than the height of the lyophilic pixel defining layer.

[0021] As an implementable manner, the first direction and the second direction are not perpendicular.

[0022] As an implementable manner, the backplane includes a substrate and a driving circuit structure arranged on the substrate.

[0023] In a second aspect, a display device is provided, comprising the above-mentioned display panel.

[0024] In a third aspect, a method for preparing the above-mentioned display panel is provided, comprising the steps of:

[0025] providing the back plate;

[0026] Opening the groove on the flat layer at the location of the lyophilic area; and

[0027] The lyophilic pixel defining layer is disposed in the groove, and the lyophobic pixel defining layer is disposed in the liquid-repellent layer.

[0028] As an achievable manner, the lyophilic pixel defining layer is disposed beyond the upper surface of the planar layer.

[0029] As an achievable manner, after the step of disposing the lyophilic pixel defining layer in the groove and the lyophilic pixel defining layer extending beyond the upper surface of the flat layer, and after the step of disposing the lyophobic pixel defining layer in a liquid-repellent manner, the method further comprises:

[0030] A pixel electrode is disposed between adjacent lyophilic regions and adjacent lyophobic regions.

[0031] As an implementable manner, after the step of providing a pixel electrode between adjacent lyophilic areas and adjacent lyophobic areas, the method further includes:

[0032] Ink and / or other components of the display panel are printed between adjacent lyophilic areas and adjacent lyophobic areas.

[0033] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below.

[0034] BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0037] FIG1 is a schematic cross-sectional view of a backplane and a planar layer in an embodiment of the present disclosure;

[0038] FIG2 is a schematic cross-sectional view of a display panel according to an embodiment of the present disclosure;

[0039] FIG3 is a top view of FIG2; and

[0040] FIG4 is a flow chart of a method for manufacturing a display panel according to an embodiment of the present disclosure.

[0041] Detailed description

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0043] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0044] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] The inkjet printing process requires the pre-fabrication of a pixel definition layer (PDL) on the substrate's electrodes to precisely control the flow of ink droplets into designated R / G / B sub-pixel areas. With traditional pixel structures, intra-pixel film uniformity decreases as resolution (255ppi) increases and pixel openings become smaller, impacting product lifespan and quality. Furthermore, due to limitations in the printer's printhead hardware, the stability of each printhead cannot guarantee consistent volume within each pixel. Even with hybrid printing algorithms, Suji Mura (a type of display unevenness caused by inconsistent ink volume between nozzles) cannot be avoided. Finally, high-resolution products require higher printing precision, with increasingly stringent requirements for both the short and long sides of the pixels. This necessitated the development of a new pixel structure, Line Bank. This structure allows for interflow of ink within each column of identically colored sub-pixels, averaging the ink within each sub-pixel, reducing variations in ink volume within the sub-pixel and improving print uniformity due to the influence of ambient air. Furthermore, Line Bank reduces the precision requirements of printer hardware. Currently, two types of Line Bank are commonly used in the industry: double-layer Line Bank and single-layer Line Bank (Half Tone). Single-layer Line Bank is generally not considered due to material limitations.

[0046] In the current Line Bank technology verification, it was found that the lyophilic pixel definition layer was thinner in the process (0.4-06μm), which was helpful for ink circulation. However, due to the characteristics of the lyophilic material, it is currently impossible to apply the glue to the target thickness in one go. The current main process thickness is relatively stable at 2.2μm, and it needs to pass through half tone (Half Tone). As the thickness of the pixel definition layer decreases, the uniformity becomes worse and worse, and the unevenness becomes more and more. The main reason is that Half Tone requires the exposure machine to have good light stability and a small exposure window.

[0047] 1 to 3 , this embodiment provides a display panel, including a back plate 1 , on which a flat layer 2 is provided;

[0048] A pixel definition layer setting area is provided on the flat layer 2, and the pixel definition layer setting area includes a lyophilic area B and a lyophobic area A. The lyophilic area B and the lyophobic area A are arranged in a crisscross pattern. The flat layer 2 is provided with a groove 21 at the location of the lyophilic area B. A lyophilic pixel definition layer 3 is provided in the groove 21, and a lyophobic pixel definition layer 4 is provided in the lyophobic area A.

[0049] The display panel provided in this embodiment has a pixel defining layer arranged on the flat layer 2, and a groove 21 structure is set at the position of the lyophilic area B of the pixel defining layer. The lyophilic pixel defining layer is arranged in the groove 21, so that the process window of its lyophilic pixel defining layer 3 is greatly increased, and the film thickness uniformity of the corresponding lyophilic pixel defining layer 3 is improved. The fluidity of the ink of the pixels in the same column of the formed pixel defining layer is improved, thereby reducing the display unevenness, reducing the risk of overflow and color cross-talk, and improving the display quality.

[0050] As shown in FIG3 , the pixel defining layer on the display panel is formed by crisscrossing lyophilic materials and lyophobic materials. The lyophobic material is set higher, and ink flow channels are formed in columns between adjacent lyophobic materials. Dropping ink in the ink flow channels can make the ink of each sub-pixel be averaged, reduce the difference in ink volume of the sub-pixels, and improve the uniformity of the printed film. Among them, the pixel defining layer is formed by lyophilic materials and lyophobic materials. The lyophilic material forms the lyophilic pixel defining layer 3 shown in FIG3 , and the lyophobic material forms the lyophobic pixel defining layer 4 shown in FIG3 . Pixel boundaries of different thicknesses are arranged in a circle. The thickness of the defining layer, especially the lyophilic pixel defining layer 3, determines whether the printing ink can flow smoothly and whether the thickness of the formed inkjet printing layer is relatively uniform. Generally, the thickness of the lyophilic pixel defining layer 3 needs to be set thinner to facilitate the circulation of ink. However, the current process generally sets the thickness of the lyophilic pixel defining layer 3 to be about 2.2 microns. The process is relatively stable, the thickness of the formed lyophilic pixel defining layer 3 is uniform, the corresponding ink circulation is also smoother, and the thickness of the formed inkjet printing layer is also uniform. Therefore, the thickness of the set pixel defining layer needs to meet the two aspects of being conducive to ink circulation and easy to prepare.

[0051] As shown in Figure 2, the lyophilic pixel defining layer 3 provided is not only arranged above the flat layer 2, but also arranged in the groove 21 opened on the flat layer 2. The thickness of the lyophilic pixel defining layer 3 is thickened by the set groove 21, but the thickness of the lyophilic pixel defining layer 3 exceeding the flat layer 2 can still meet the thinner standard and facilitate the circulation of ink.

[0052] Furthermore, the orthographic projection of the groove 21 on the back plate 1 is not smaller than the set orthographic projection of the lyophilic pixel defining layer 3 on the back plate 1 .

[0053] A lyophilic pixel defining layer 3 needs to be set on the display panel provided in this embodiment. The structure has a certain width and length. In this embodiment, a groove 21 is set on the flat layer 2 to accommodate the lyophilic pixel defining layer 3. The groove 21 needs to be set slightly larger than the set width and length of the lyophilic pixel defining layer 3, and at least cover the set structure size, so that the lyophilic pixel defining layer 3 formed in the groove 21 can meet the required size requirements.

[0054] Furthermore, the lyophilic pixel defining layer 3 is arranged higher than the flat layer 2 by a height H1, wherein 0.6 μm ≥ H1 ≥ 0.3 μm.

[0055] The lyophilic pixel defining layer 3 provided in this embodiment needs to be set at a certain height exceeding the flat layer 2. The lyophilic pixel defining layer 3 exceeding the height needs to be set thinner, and can be set to a thickness that facilitates the circulation of ink. The lyophilic pixel defining thickness can be optionally set between 0.6 microns and 0.3 microns. Since the lyophilic pixel defining layer 3 is partially provided in the groove 21, the overall thickness can be set thicker and the thickness exceeding the flat layer 2 can be set to a desired thickness at any time. The lyophilic pixel defining layer 3 facilitates the circulation of ink, and the thickness of the formed inkjet printing layer is uniform, the display panel is uniform, and the display quality is stable.

[0056] Furthermore, the lyophilic pixel defining layer 3 is set to have a thickness of H2, wherein 3 μm ≥ H2 ≥ 2 μm.

[0057] As shown in Figure 1, the lyophilic pixel defining layer 3 provided in this embodiment is arranged in the groove 21 on the flat layer 2. The thickness of the lyophilic pixel defining layer 3 is increased by the groove 21, so that the thickness of the structure can be within the range of process stability. The thickness of the lyophilic pixel defining layer 3 can be optionally set to 2-3 microns, and the optional setting thickness is 2.2 microns. The process thickness is relatively stable, and the thickness of the formed lyophilic pixel defining layer 3 is stable. No other process is required to meet the thickness of the above-mentioned lyophilic pixel defining layer 3 exceeding the flat layer 2, so that the preparation of the structure can be carried out under a stable process while also meeting the effect of facilitating ink circulation that can only be met by a thinner thickness. According to the thickness of the above-mentioned lyophilic pixel defining layer 3 and the thickness of the pixel defining layer exceeding the flat layer 2, it can be seen that the depth of the groove 21 of the flat layer 2 is the value of H2-H1, which is generally 2.4μm-1.7μm.

[0058] Optionally, a pixel electrode 5 is provided between adjacent lyophilic areas B and adjacent lyophobic areas A.

[0059] As shown in FIG2 , pixel electrodes 5 are provided between adjacent lyophilic areas B and lyophobic areas A. As shown in FIG3 , pixel electrodes 5 are provided at intervals between the lyophilic areas B and lyophobic areas A that are staggered in a crisscross pattern.

[0060] Optionally, the lyophobic pixel defining layer 4 has a thickness of H3, wherein 1.5 μm ≥ H3 ≥ 1 μm.

[0061] The display panel provided in this embodiment forms channels for ink to flow through the lyophobic pixel defining layer 4 . The thickness of the lyophobic pixel defining layer 4 can be optionally set to be between 1 micron and 1.5 microns.

[0062] Furthermore, the liquid-phobic pixel defining layer 4 includes a plurality of first portions arranged along a first direction, and at least two second portions arranged along a second direction. A through area 6 is formed between adjacent first portions, and the through area 6 is used to accommodate ink droplets.

[0063] As shown in Figure 3, the lyophobic pixel defining layer 4 includes a portion extending along the y-axis direction, and a lyophilic pixel defining layer 3 is provided between adjacent lyophobic pixel defining layers 4. The lyophilic pixel defining layer 3 extends along the x-axis direction. The height of the lyophobic pixel defining layer 4 is higher than the lyophilic pixel defining layer 3. A through area is formed between the lyophobic pixel defining layers 4 to accommodate ink. A corresponding lyophobic pixel defining layer 4 is also provided on the outermost side of the lyophilic pixel defining layer 3 to intercept the printed ink.

[0064] Furthermore, the lyophilic pixel defining layer 3 is disposed in the through-hole area 6 .

[0065] In this embodiment, the lyophilic pixel defining layer 3 is retained in the through-hole area 6 , and the effective thickness of the lyophilic pixel defining layer 3 , that is, the thickness exceeding the flat layer 2 , is set to be smaller to facilitate the circulation of ink.

[0066] This embodiment further provides a display device, including the above-mentioned display panel.

[0067] In a specific implementation, the display device provided in this embodiment can be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigation system. Other essential components of the display device are well understood by those skilled in the art and will not be described in detail herein, nor should they be construed as limitations of the present disclosure. As shown in FIG4 , this embodiment also provides a method for preparing the above-mentioned display panel, comprising the following steps:

[0068] A back plate 1 is provided, wherein a flat layer 2 is provided on the back plate 1;

[0069] A pixel definition layer setting area is provided on the flat layer 2, and the pixel definition layer setting area is divided into a lyophilic area B and a lyophobic area A, and the lyophilic area B and the lyophobic area A are arranged in a crisscross pattern;

[0070] A groove 21 is formed on the flat layer 2 at the location of the lyophilic area B;

[0071] A lyophilic pixel defining layer 3 is disposed in the groove 21 and extends beyond the upper surface of the flat layer 2 . A lyophobic pixel defining layer 4 is disposed on the liquid-repellent layer.

[0072] When preparing the display panel provided in the above embodiment, a backplane 1 is first provided. The backplane 1 includes a substrate and a driving circuit structure provided on the substrate. A flat layer 2 is provided on the backplane 1, and then a groove 21 is provided on the flat layer 2 to form the structure shown in FIG1 . The groove 21 on the flat layer 2 is specifically provided at the location of the lyophilic area B. The depth of the groove 21 can be set to a range of 2.4 μm to 1.7 μm according to the above embodiment. No other configuration is performed on the location of the lyophobic area A on the flat layer 2.

[0073] Subsequently, a pixel defining layer is provided on the flat layer 2. Specifically, the lyophilic pixel defining layer 3 is provided in the groove 21 and exceeds the flat layer 2 by a certain distance. The thickness of the lyophilic pixel defining layer 3 extending beyond the flat layer 2 can be optionally set to 0.6 μm ≥ H1 ≥ 0.3 μm. This thickness can be understood as the effective thickness of the lyophilic pixel defining layer 3. This thickness can ensure that the ink subsequently subjected to inkjet printing has good fluidity between the lyophobic pixel defining layers 4. In fact, the pixel defining layer itself is relatively thick, and a stable thickness can be prepared in the existing process. At the same time, the lyophobic pixel defining layer 4 is provided in the lyophobic area A and is set to a thickness of 1-1.5 μm. A through area 6 is formed between adjacent lyophobic pixel defining layers 4 to accommodate the ink.

[0074] Then, pixel electrodes 5 are disposed on the spaces between the pixel defining layers, forming a structure as shown in FIG. 2 .

[0075] Ink and other structural arrangements are then printed in the spaces between the pixel-defining layers.

[0076] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present disclosure; the directional terms "inside" and "outside" refer to the inside and outside relative to the outline of each component itself. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0077] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0078] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

[0079] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0080] References herein to "one embodiment," "an embodiment," or "one or more embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Furthermore, please note that instances of the phrase "in one embodiment" do not necessarily all refer to the same embodiment.

[0081] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0082] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present disclosure may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A display panel, wherein: comprising a back plate having a flat layer disposed thereon; and A pixel defining layer setting area is provided on the flat layer, and the pixel defining layer setting area includes a lyophilic area and a lyophobic area. The lyophilic area and the lyophobic area are arranged in a crisscross manner. The flat layer is provided with a groove at the location of the lyophilic area, a lyophilic pixel defining layer is provided in the groove, and the lyophobic area is provided with a lyophobic pixel defining layer.

2. The display panel according to claim 1, wherein: The orthographic projection of the groove on the backplane is not less than the set orthographic projection of the lyophilic pixel defining layer on the backplane.

3. The display panel according to claim 1, wherein: The lyophilic pixel defining layer is arranged higher than the planar layer.

4. The display panel according to claim 3, wherein: The height of the lyophilic pixel defining layer above the planar layer is H1, wherein 0.6 μm ≥ H1 ≥ 0.3 μm.

5. The display panel according to claim 1, wherein: The liquid-phobic pixel defining layer forms a channel for ink to flow.

6. The display panel according to claim 3, wherein: The lyophilic pixel defining layer is set to have a thickness of H2, wherein 3 μm ≥ H2 ≥ 2 μm.

7. The display panel according to any one of claims 1 to 6, wherein: A pixel electrode is arranged between adjacent lyophilic regions and adjacent lyophobic regions.

8. The display panel according to any one of claims 1 to 6, wherein: The thickness of the liquid-phobic pixel defining layer is H3, wherein 1.5 μm ≥ H3 ≥ 1 μm.

9. The display panel according to claim 6, wherein: The depth of the groove of the planar layer is H2 - H1.

10. The display panel according to any one of claims 1 to 6, wherein: The liquid-phobic pixel defining layer includes a plurality of first portions arranged along a first direction, and at least two second portions arranged along a second direction, and a through area is formed between adjacent first portions, and the through area is used to accommodate ink droplets, wherein the first direction and the second direction are not parallel.

11. The display panel according to claim 10, wherein: The lyophilic pixel defining layer is disposed in the through-region.

12. The display panel according to claim 11, wherein: The lyophilic pixel defining layer extends along the second direction.

13. The display panel according to claim 11, wherein: The height of the liquid-phobic pixel defining layer is higher than the height of the lyophilic pixel defining layer.

14. The display panel according to claim 10, wherein: The first direction and the second direction are not perpendicular.

15. The display panel according to claim 1, wherein: The backplane includes a substrate and a driving circuit structure arranged on the substrate.

16. A display device, wherein: Comprising the display panel described in any one of claims 1-15.

17. A method for preparing a display panel according to any one of claims 1 to 15, wherein: Includes steps: Providing the back plate; Opening the groove on the flat layer at the location of the lyophilic area; and The lyophilic pixel defining layer is arranged in the groove, and the lyophobic pixel defining layer is arranged in the liquid-repellent layer.

18. The preparation method according to claim 17, wherein: The lyophilic pixel defining layer is disposed beyond the upper surface of the planar layer.

19. The preparation method according to claim 17, wherein: After the step of arranging the lyophilic pixel defining layer in the groove and the lyophilic pixel defining layer is arranged beyond the upper surface of the flat layer, and after the step of arranging the lyophobic pixel defining layer in a liquid-repellent manner, the method further comprises: A pixel electrode is disposed between adjacent lyophilic regions and adjacent lyophobic regions.

20. The preparation method according to claim 19, wherein: After the step of providing a pixel electrode between adjacent lyophilic regions and adjacent lyophobic regions, the method further comprises: Ink and / or other components of the display panel are printed between adjacent lyophilic areas and adjacent lyophobic areas.

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