Display substrate, preparation method thereof and display device

Abstract

The embodiment of the present application provides a display substrate and a preparation method thereof and a display device, and belongs to the field of display devices.The display substrate comprises a substrate, an electrode layer arranged on one side of the substrate, a first pixel definition layer arranged on the side of the electrode layer away from the substrate and used for defining a plurality of pixel regions, and the first pixel definition layer comprises a first barrier wall extending along a first direction; wherein the first barrier wall has a lyophilicity in the light-emitting area, and the first barrier wall has a lyophobicity in the packaging area. Through the display substrate, the preparation method thereof and the display device provided by the embodiment of the present application, water vapor and oxygen can be prevented from invading the light-emitting area from the packaging area of the display substrate, and the service life of the display substrate is improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of display devices, and in particular, to a display substrate, a preparation method thereof, and a display device. BACKGROUND

[0002] With the development of society, people's demand for display products is becoming more and more diversified and customized, so printing special-shaped products has emerged as the times require. Special-shaped display products are a unique light-emitting panel, and the display area thereof is a non-rectangular area such as a circular, curved, or polygonal area.

[0003] At present, mature product lines generally use inkjet printing technology to produce special-shaped products. In this process, the printing area is generally rectangular, that is, the entire panel, whether it is a light-emitting area or a non-light-emitting area, and a packaging area will be covered with organic ink. That is, the organic ink is a continuous organic film layer without being disconnected in the packaging area. Then, water vapor and oxygen will invade from the organic film layer and extend to the light-emitting area, causing the organic material in the light-emitting area to be eroded, ultimately leading to poor light emission of the product, thereby affecting the display effect and service life of the product. SUMMARY

[0004] Embodiments of the present application provide a display substrate, a preparation method thereof, and a display device, aiming to avoid water vapor and oxygen invading the light-emitting area from the packaging area of the display substrate, and improve the service life of the display substrate.

[0005] A first aspect of embodiments of the present application provides a display substrate, the display substrate comprising a light-emitting area and a packaging area located on one side of the light-emitting area, and the display substrate comprising:

[0006] a substrate;

[0007] an electrode layer disposed on one side of the substrate;

[0008] a first pixel definition layer disposed on a side of the electrode layer away from the substrate, for defining a plurality of pixel areas, the first pixel definition layer comprising a first barrier wall extending in a first direction;

[0009] wherein the first barrier wall has a lyophilic property in the light-emitting area, and the first barrier wall has a lyophobic property in the packaging area.

[0010] Optionally, the material of the first barrier wall located in the packaging area is a material containing a lyophobic group.

[0011] Optionally, the first pixel definition layer further includes: a second barrier extending along a second direction, wherein the second barrier is intersecting with the first barrier; the first barrier is located between two pixel regions with the same emission color, and the second barrier is located between two pixel regions with different emission colors.

[0012] Optionally, the first direction and the second direction are perpendicular to each other.

[0013] Optionally, the display substrate further includes an encapsulation layer in the encapsulation area, the encapsulation layer being disposed on the side of the first pixel definition layer opposite to the electrode layer, and the orthographic projection of the encapsulation layer on the substrate covering the orthographic projection of the second barrier wall located in the encapsulation area on the substrate.

[0014] Optionally, the display substrate further includes a second pixel definition layer in the encapsulation area. The second pixel definition layer is disposed on the side of the encapsulation layer opposite to the first pixel definition layer, and the orthographic projection of the second pixel definition layer on the substrate covers the orthographic projection of the encapsulation layer on the substrate.

[0015] Optionally, within the encapsulation area, the thickness of the second pixel definition layer is less than the thickness of the encapsulation layer.

[0016] Optionally, the material of the encapsulation layer includes one of the following: inorganic materials and metallic materials.

[0017] Optionally, the display substrate further includes: a light-emitting material layer, the light-emitting material layer being disposed on the side of the first pixel definition layer opposite to the substrate;

[0018] The plurality of pixel regions include a first pixel region located in the light-emitting region and a second pixel region located in the encapsulation region. The orthographic projection of the light-emitting material layer in the light-emitting region onto the substrate covers the orthographic projection of the first pixel region and the first barrier onto the substrate. The orthographic projection of the light-emitting material layer in the encapsulation region onto the substrate is located within the orthographic projection range of the first pixel region onto the substrate.

[0019] Optionally, the thickness of the first retaining wall is less than the thickness of the second retaining wall.

[0020] Optionally, the shape of the light-emitting area includes one of the following: circular, curved, and polygonal.

[0021] A second aspect of this application provides a display device, including a display substrate as provided in the first aspect of this application.

[0022] A third aspect of this application provides a method for fabricating a display substrate, the display substrate including a light-emitting region and an encapsulation region, the fabrication method comprising:

[0023] Provide substrate;

[0024] An electrode layer is formed on the substrate;

[0025] A first pixel definition layer is formed on the side of the electrode layer opposite to the substrate. The first pixel definition layer includes a first barrier extending in a first direction and a second barrier extending in a second direction.

[0026] The first barrier wall is hydrophilic in the light-emitting area and hydrophobic in the encapsulation area.

[0027] An encapsulation layer is formed on the side of the first pixel definition layer away from the electrode layer, and the orthogonal projection of the encapsulation layer on the substrate covers the orthogonal projection of the second barrier located in the encapsulation area on the substrate.

[0028] A second pixel definition layer is formed on the side of the encapsulation layer opposite to the first pixel definition layer, and the orthogonal projection of the second pixel definition layer on the substrate covers the orthogonal projection of the encapsulation layer on the substrate.

[0029] Beneficial effects:

[0030] This application provides a display substrate and its preparation method, as well as a display device. By sequentially distributing a substrate, an electrode layer, and a first pixel definition layer on the substrate, the first pixel definition layer includes a first barrier extending along a first direction. The first barrier is hydrophilic in the light-emitting area of ​​the display substrate and hydrophobic in the encapsulation area of ​​the display substrate. Thus, after the ink organic film layer is printed, during the ink drying process, the ink organic film layer in the encapsulation area is interrupted by the hydrophobic first barrier, making the ink organic film layer discontinuous in the encapsulation area. This prevents water vapor and oxygen from penetrating from the encapsulation area to the light-emitting area through the ink organic film layer, thereby avoiding corrosion of the organic material in the light-emitting area and ensuring the display effect and service life of the display substrate. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of a planar structure of a display substrate according to an embodiment of this application;

[0033] Figure 2This is a schematic diagram of a planar structure of a display substrate including a first pixel definition layer according to an embodiment of this application;

[0034] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure along section a-a' in the middle;

[0035] Figure 4 yes Figure 2 A schematic diagram of the cross-sectional structure along section b-b'.

[0036] Figure 5 yes Figure 2 A schematic diagram of the cross-sectional structure along the c-c' section.

[0037] Figure 6 This is a flowchart of the steps of a method for preparing a display substrate according to an embodiment of this application;

[0038] Figure 7 This is a schematic diagram of the structure for completing the fabrication of a display substrate according to an embodiment of this application;

[0039] Figure 8 This is a schematic diagram of a display substrate with an electrode layer fabricated according to an embodiment of this application;

[0040] Figure 9 This is a schematic diagram of the structure for fabricating the first barrier of the first pixel definition layer on a display substrate according to an embodiment of this application;

[0041] Figure 10 This is a schematic diagram of the structure for fabricating a second barrier on a display substrate to complete the first pixel definition layer, according to an embodiment of this application.

[0042] Figure 11 This is a schematic diagram of a display substrate with a completed encapsulation layer according to an embodiment of this application;

[0043] Figure 12 This is a schematic diagram of the structure of a display substrate completing the fabrication of the second pixel definition layer according to an embodiment of this application.

[0044] Explanation of reference numerals in the attached figures: 10, substrate; 20, electrode layer; 30, first pixel definition layer; 301, first barrier; 302, second barrier; 40, encapsulation layer; 50, second pixel definition layer; 60, light-emitting material layer; A, light-emitting area; B, encapsulation area; C, first pixel area; D, second pixel area; E, cutting area. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] In related technologies, on the Line Bank substrate of irregularly shaped products, since the ink between each column of sub-pixels on the Line Bank substrate is interconnected, an organic ink film layer exists in both the light-emitting area and the encapsulation area of ​​this column. Furthermore, the organic ink film layers in the light-emitting area and the encapsulation area are continuous. As a result, moisture and oxygen can penetrate from the encapsulation area to the light-emitting area along the organic ink film layer. In addition, moisture and oxygen may also penetrate from the encapsulation area to the light-emitting area along the pixel boundary layer of the Line Bank substrate, thereby causing the organic material in the light-emitting area to be corroded, ultimately leading to poor light emission of the product, thus affecting the display and lifespan of the product.

[0047] In view of this, this application provides a display substrate and its preparation method, as well as a display device. By sequentially distributing a substrate, an electrode layer, and a first pixel definition layer on the substrate, the first pixel definition layer includes a first barrier extending along a first direction. The first barrier is hydrophilic in the light-emitting area of ​​the display substrate and hydrophobic in the encapsulation area. Thus, after the ink organic film layer is printed, during the ink drying process, the ink organic film layer in the encapsulation area is interrupted by the hydrophobic first barrier, making the ink organic film layer discontinuous in the encapsulation area. This prevents water vapor and oxygen from penetrating from the encapsulation area to the light-emitting area through the ink organic film layer, thereby avoiding corrosion of the organic material in the light-emitting area and ensuring the display effect and service life of the display substrate.

[0048] Reference Figure 1 As shown, this is a display substrate provided in an embodiment of this application. The display substrate includes a light-emitting area A, an encapsulation area B located on one side of the light-emitting area A, and a cutting area E located on the side of the encapsulation area B away from the light-emitting area A. The light-emitting area A refers to the area in the display substrate used to provide light, and the light provided by the light-emitting area A may include red light, blue light, green light, etc. The encapsulation area B is located on one side of the light-emitting area A in the display substrate, and the encapsulation area B does not provide light, that is, the encapsulation area B does not have a display effect.

[0049] Meanwhile, in this display substrate, the light-emitting area A is non-rectangular. For example, the shape of the light-emitting area A can be circular, curved, or polygonal. Furthermore, referring to… Figure 2As shown, the display substrate employs a Line Bank structure, using first barrier walls 301 distributed along a first direction and second barrier walls 302 distributed along a second direction to separate each pixel, wherein the first and second directions are perpendicular. The second barrier walls 302 separate light-emitting material layers 60 of different colors (not shown in the figure). The light-emitting material layers 60 may include a red light-emitting material layer 60, a green light-emitting material layer 60, and a green light-emitting material layer 60, with adjacent second barrier walls 302 separated by light-emitting material layers 60 of the same color.

[0050] Reference Figure 3 As shown, the display substrate comprises, from bottom to top, a substrate 10, an electrode layer 20, a first pixel electrode layer 30, and a light-emitting material layer 60 stacked together.

[0051] Furthermore, the substrate 10 can be a TFT (Thin Film Transistor) substrate 10. For example, the TFT can be any one of a low-temperature polysilicon (LTPS) TFT, an oxide TFT, or a solid phase crystallization (SCF) TFT.

[0052] Furthermore, the electrode layer 20 is located on one side of the substrate 10. The substrate 10 has a first surface and a second surface disposed opposite to each other. The first surface can be the upper surface of the substrate 10, and the second surface can be the lower surface of the substrate 10; alternatively, the first surface can also be the lower surface of the substrate 10, and the second surface can also be the upper surface of the substrate 10. The substrate 10 can be located on either the first surface or the second surface of the substrate 10. In this embodiment, the electrode layer 20 is located on the first surface of the substrate 10 (the first surface is defaulted to the upper surface in this embodiment).

[0053] Furthermore, referring to Figure 2 As shown, a first pixel definition layer 30 is disposed on the side of the electrode layer 20 facing away from the substrate 10. The first pixel definition layer 30 includes a first barrier 301 extending along a first direction and a second barrier 302 extending along a second direction, wherein the first barrier 301 and the second barrier 302 are intersecting, and the first direction is perpendicular to the second direction. Multiple pixel regions can be defined and formed on the display substrate using the first pixel definition layer 30. Furthermore, the first barrier is located between two pixel regions of the same color, and the second barrier is located between two pixel regions of different colors.

[0054] In practical applications, the thickness of the first retaining wall 301 is less than the thickness of the second retaining wall 302. The thickness of the first retaining wall 301 is greater than or equal to 0.1 μm and less than or equal to 1 μm. For example, the thickness of the first retaining wall 301 can be 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 1 μm, etc.; the thickness of the second retaining wall 302 is greater than or equal to 0.9 μm and less than or equal to 1.7 μm. For example, the thickness of the second retaining wall 302 can be 0.9 μm, 1 μm, 1.1 μm, 1.3 μm, 1.5 μm, 1.7 μm, etc.

[0055] Furthermore, on this display substrate, a first barrier 301 and a second barrier 302 are simultaneously distributed in the light-emitting area A and the encapsulation area B of the display substrate. The first barrier 301 is hydrophilic in the light-emitting area A and hydrophobic in the encapsulation area B. It should be noted that the hydrophilicity of the first barrier 301 refers to its strong affinity with organic ink when in contact with it, while its hydrophobicity refers to its mutual repulsion with organic ink when in contact with it.

[0056] In this way, after the organic ink is printed onto the display substrate by inkjet printing, during the ink drying process, because the first barrier 301 of the light-emitting area A is hydrophilic, the organic ink film layer in the light-emitting area A is continuous. However, because the first barrier 301 of the encapsulation area B is hydrophobic, the organic ink film layer in the encapsulation area B is interrupted by the first barrier 301 and is discontinuous. This prevents water vapor and oxygen from penetrating from the encapsulation area B of the display substrate into the light-emitting area A through the organic ink film layer, thereby avoiding the erosion of the organic material in the light-emitting area A.

[0057] It should be noted that the second barrier 302 is hydrophobic in both the light-emitting area A and the encapsulation area B, so that the second barrier 302 can isolate the light-emitting material layers 60 of different colors.

[0058] To further illustrate the different situations of the ink organic film layer in the light-emitting area A and the encapsulation area B, referring to the figure, the light-emitting material layer 60 (which can be understood as the ink organic film layer) is disposed on the side of the first pixel definition layer 30 away from the substrate 10.

[0059] Specifically, refer to Figure 2 As shown, the first barrier 301 and the second barrier 302 define a plurality of pixel regions, including a first pixel region C located in the light-emitting region A and a second pixel region D located in the encapsulation region B.

[0060] Specifically, refer to Figure 3As shown, the orthographic projection of the light-emitting material layer 60 located in the light-emitting area A onto the substrate 10 covers the orthographic projection of the first pixel area C and the first barrier 301 onto the substrate 10. The orthographic projection of the light-emitting material layer 60 located in the encapsulation area B onto the substrate 10 is within the orthographic projection range of the second pixel area D onto the substrate 10.

[0061] Therefore, it can be seen that the luminescent material layer 60 is still continuous in the luminescent area A and will not affect the normal luminescence of the luminescent area A. However, the luminescent material layer 60 is disconnected in the encapsulation area B, so that water vapor and oxygen cannot penetrate from the encapsulation area B into the luminescent area A through the luminescent material layer 60.

[0062] In an optional embodiment, this application also provides a display substrate in which the material of the first barrier 301 located in the encapsulation region B is a material containing hydrophobic groups.

[0063] Specifically, the material of the first barrier 301 in the light-emitting region A can be polyimide (PI), polymethyl methacrylate (PMMA), etc., and the material of the first barrier 301 in the encapsulation region B can also be polyimide, polymethyl methacrylate, etc. However, in order to make the first barrier 301 in the encapsulation region B hydrophobic, hydrophobic groups need to be added to the original material. For example, the hydrophobic groups can be fluorinated groups, such as fluorinated hydroxyl groups, fluorinated hydrocarbon groups, etc. The hydrophobic groups can be doped into the original material or bonded to the original material.

[0064] After the addition of the hydrophobic group, the first barrier 301 floats to the surface and forms a hydrophobic layer on the side of the first barrier 301 away from the substrate 10. This hydrophobic layer makes the first barrier 301 located in the encapsulation area B hydrophobic, thereby causing the organic ink to repel the first barrier 301 located in the encapsulation area B.

[0065] Of course, the second barrier 302 can also be made of a material with added liquid-repellent groups, thereby making the second barrier 302 liquid-repellent.

[0066] In the display substrate, moisture and oxygen may also invade from the encapsulation area B to the light-emitting area A along the second barrier 302. To prevent moisture and oxygen from invading through the second barrier 302, this application embodiment also provides a display substrate, see below. Figure 4 As shown, the display substrate also includes a stacked encapsulation layer 40 and a second pixel definition layer 50 in the encapsulation area B.

[0067] Specifically, refer to Figure 4 and Figure 5As shown, the encapsulation layer 40 is disposed on the side of the first pixel definition layer 30 away from the electrode layer 20, and the orthographic projection of the encapsulation layer 40 on the substrate 10 covers the orthographic projection of the second barrier wall 302 on the substrate 10, that is, the encapsulation layer 40 completely covers the second barrier wall 302.

[0068] The material of the encapsulation layer 40 can be an inorganic material, such as silicon nitride or silicon oxynitride, or a metallic material, such as Ag, Al, or Cu.

[0069] Reference Figure 4 and Figure 5 As shown, the second pixel definition layer 50 is disposed on the side of the encapsulation layer 40 away from the first pixel definition layer 30, and the orthographic projection of the second pixel definition layer 50 on the substrate 10 covers the orthographic projection of the encapsulation layer 40 on the substrate 10, that is, the second pixel definition layer 50 completely covers the encapsulation layer 40.

[0070] The second pixel definition layer 50 can be made of the same material as the first pixel definition layer 30, such as polyimide, polymethyl methacrylate, etc., and the second pixel definition layer 50, like the second barrier 302, has hydrophobic properties.

[0071] The thickness of the second pixel definition layer 50 is greater than or equal to 0.9 μm and less than or equal to 1 μm. For example, the thickness of the second pixel definition layer 50 can be 0.9 μm, 1 μm, 1.1 μm, 1.3 μm, 1.5 μm, 1.7 μm, etc. Furthermore, within the encapsulation region B, the thickness of the second pixel definition layer 50 is less than the thickness of the encapsulation layer 40.

[0072] With the display substrate provided in this application embodiment, after the encapsulation layer 40 and the second pixel definition layer 50 are set, the second barrier 302 is completely covered, so that water vapor and oxygen cannot penetrate into the second barrier 302 through the second pixel definition layer 50 and the encapsulation layer 40. This further prevents water vapor and oxygen from penetrating from the encapsulation area B to the light-emitting area A, thereby preventing the organic material of the light-emitting area A from being corroded, ensuring the display effect and service life of the display substrate, and also improving the encapsulation effect of the display substrate.

[0073] Based on the same inventive concept, embodiments of this application also disclose a display device, including any of the display substrates described in embodiments of this application.

[0074] Specifically, the display device may include computer monitors, televisions, billboards, laser printers with display functions, telephones, mobile phones, personal digital assistants (PDAs), laptops, digital cameras, portable camcorders, viewfinders, vehicles, large walls, theater screens, or stadium signs, etc.

[0075] In this display device, by setting the first barrier 301 of the encapsulation area B in the display substrate to be hydrophobic, the ink organic film layer of the encapsulation area B is blocked by the hydrophobic first barrier 301, so that the ink organic film layer in the encapsulation area B is not continuous. This prevents water vapor and oxygen from penetrating from the encapsulation area B to the light-emitting area A through the ink organic film layer, thereby avoiding the corrosion of the organic material in the light-emitting area A and ensuring the display effect and service life of the display substrate.

[0076] Figure 6 A flowchart illustrating the steps of a method for fabricating a display substrate is shown. Figure 6 As shown in the embodiments of this application, a method for fabricating a display substrate is also disclosed. The display substrate includes a light-emitting region A and an encapsulation region B. The fabrication method includes:

[0077] Step 101: Provide substrate 10.

[0078] Specifically, the substrate 10 can be a TFT substrate 10, therefore the step of providing the substrate 10 can include completing the fabrication of the substrate 10 and the TFT, such as... Figure 7 As shown.

[0079] Step 102: Form an electrode layer 20 on the substrate 10.

[0080] Specifically, the electrode layer 20 can be formed on the first surface or the second surface of the substrate 10, such as... Figure 8 As shown.

[0081] Step 103: A first pixel definition layer 30 is formed on the side of the electrode layer 20 away from the substrate 10. The first pixel definition layer 30 includes a first barrier 301 extending along a first direction.

[0082] Specifically, the first pixel definition layer 30 further includes a second barrier 302 extending along the second direction, wherein the first barrier 301 and the second barrier 302 are intersecting, and the first direction and the second direction are perpendicular. The first barrier 301 is hydrophilic in the light-emitting area A and hydrophobic in the encapsulation area B, and the second barrier 302 is hydrophobic in both the light-emitting area A and the encapsulation area B. The first barrier 301 in the light-emitting area A can be made of materials such as polyimide and polymethyl methacrylate, the first barrier 301 in the encapsulation area B can be made of materials such as polyimide and polymethyl methacrylate doped with hydrophobic groups, and the second barrier 302 can be made of materials such as polyimide and polymethyl methacrylate doped with hydrophobic groups. Figure 9 and Figure 10 As shown.

[0083] By making the first barrier 301 hydrophobic in the encapsulation area B, the ink organic film layer in the encapsulation area B is blocked by the hydrophobic first barrier 301, making the ink organic film layer discontinuous in the encapsulation area B. This prevents water vapor and oxygen from penetrating from the encapsulation area B to the light-emitting area A through the ink organic film layer, thereby avoiding the erosion of the organic material in the light-emitting area A and ensuring the display effect and service life of the display substrate.

[0084] To further prevent moisture and oxygen from entering the light-emitting area A through the second barrier 302 from the encapsulation area B, refer to... Figure 6 As shown, the method for preparing the display substrate further includes:

[0085] Step 104: An encapsulation layer 40 is formed on the side of the first pixel definition layer 30 away from the electrode layer 20. The orthographic projection of the encapsulation layer 40 on the substrate 10 covers the orthographic projection of the second barrier 302 located in the encapsulation area B on the substrate 10.

[0086] Specifically, the encapsulation layer 40 can be fabricated using a deposition process. The material of the encapsulation layer 40 can be an inorganic material, such as silicon nitride or silicon oxynitride, or a metallic material, such as Ag, Al, or Cu. Figure 11 As shown.

[0087] Step 105: A second pixel definition layer 50 is formed on the side of the encapsulation layer 40 opposite to the first pixel definition layer 30. The orthogonal projection of the second pixel definition layer 50 on the substrate 10 covers the orthogonal projection of the encapsulation layer 40 on the substrate 10.

[0088] Specifically, the second pixel definition layer 50 can be made of the same material as the first pixel definition layer 30, such as polyimide, polymethyl methacrylate, etc., and the second pixel definition layer 50, like the second barrier 302, has hydrophobic properties. Figure 12 As shown.

[0089] By setting the encapsulation layer 40 and the second pixel definition layer 50, water vapor and oxygen cannot penetrate into the second barrier 302 through the second pixel definition layer 50 and the encapsulation layer 40. This further prevents water vapor and oxygen from penetrating from the encapsulation area B into the light-emitting area A, thereby preventing the organic material of the light-emitting area A from being corroded, ensuring the display effect and service life of the display substrate, and also improving the encapsulation effect of the display substrate.

[0090] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0091] It should also be noted that, in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor should they be construed as indicating or implying relative importance. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "includes a..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0092] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand this application, and the content of this specification should not be construed as a limitation of this application. Furthermore, for those skilled in the art, there will be different forms of changes in the specific implementation methods and application scope based on this application. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious changes or modifications derived therefrom are still within the protection scope of this application.

Claims

1. A display substrate, characterized in that, The display substrate includes a light-emitting area and an encapsulation area located on one side of the light-emitting area. The display substrate includes: substrate; An electrode layer is disposed on one side of the substrate; A first pixel definition layer is disposed on the side of the electrode layer away from the substrate, for defining a plurality of pixel regions, and the first pixel definition layer includes a first barrier extending along a first direction; The first barrier wall is hydrophilic in the light-emitting area and hydrophobic in the encapsulation area. The first pixel definition layer further includes: a second barrier extending along a second direction, wherein the second barrier is intersecting with the first barrier; the first barrier is located between two pixel regions with the same emission color, and the second barrier is located between two pixel regions with different emission colors; wherein the second barrier is hydrophobic in both the emission region and the encapsulation region; The display substrate further includes, in the encapsulation region: An encapsulation layer is disposed on the side of the first pixel definition layer opposite to the electrode layer, and the orthogonal projection of the encapsulation layer on the substrate covers the orthogonal projection of the second barrier located in the encapsulation area on the substrate. The display substrate further includes, in the encapsulation region: The second pixel definition layer is disposed on the side of the encapsulation layer opposite to the first pixel definition layer, and the orthographic projection of the second pixel definition layer on the substrate covers the orthographic projection of the encapsulation layer on the substrate.

2. The display substrate according to claim 1, characterized in that: The first barrier located in the encapsulation area is made of a material containing hydrophobic groups.

3. The display substrate according to claim 1, characterized in that: The first direction is perpendicular to the second direction.

4. The display substrate according to claim 1, characterized in that: Within the encapsulation area, the thickness of the second pixel definition layer is less than the thickness of the encapsulation layer.

5. The display substrate according to claim 1, characterized in that: The material of the encapsulation layer includes one of the following: inorganic materials and metallic materials.

6. The display substrate according to claim 1, characterized in that, The display substrate further includes: A light-emitting material layer is disposed on the side of the first pixel definition layer opposite to the substrate; The plurality of pixel regions include a first pixel region located in the light-emitting region and a second pixel region located in the encapsulation region. The orthographic projection of the light-emitting material layer in the light-emitting region onto the substrate covers the orthographic projection of the first pixel region and the first barrier onto the substrate. The orthographic projection of the light-emitting material layer in the encapsulation region onto the substrate is located within the orthographic projection range of the second pixel region onto the substrate.

7. The display substrate according to any one of claims 1-6, characterized in that: The thickness of the first retaining wall is less than the thickness of the second retaining wall.

8. The display substrate according to claim 1, characterized in that: The shape of the light-emitting area includes one of the following: circular, curved, and polygonal.

9. A display device, characterized in that: Includes the display substrate as described in any one of claims 1-7.

10. A method for fabricating a display substrate, the display substrate comprising a light-emitting region and an encapsulation region, characterized in that, The preparation method includes: Provide substrate; An electrode layer is formed on the substrate; A first pixel definition layer is formed on the side of the electrode layer opposite to the substrate. The first pixel definition layer includes a first barrier extending in a first direction and a second barrier extending in a second direction. Wherein, the first barrier is hydrophilic in the light-emitting area and hydrophobic in the encapsulation area; the second barrier is hydrophobic in both the light-emitting area and the encapsulation area. An encapsulation layer is formed on the side of the first pixel definition layer away from the electrode layer, and the orthogonal projection of the encapsulation layer on the substrate covers the orthogonal projection of the second barrier located in the encapsulation area on the substrate. A second pixel definition layer is formed on the side of the encapsulation layer opposite to the first pixel definition layer, and the orthogonal projection of the second pixel definition layer on the substrate covers the orthogonal projection of the encapsulation layer on the substrate. The first pixel definition layer further includes: a second barrier extending along a second direction, wherein the second barrier is intersected with the first barrier; the first barrier is located between two pixel regions with the same emission color, and the second barrier is located between two pixel regions with different emission colors; The display substrate further includes an encapsulation layer in the encapsulation area. The encapsulation layer is disposed on the side of the first pixel definition layer away from the electrode layer. The orthogonal projection of the encapsulation layer on the substrate covers the orthogonal projection of the second barrier wall located in the encapsulation area on the substrate. The display substrate further includes a second pixel definition layer in the encapsulation area. The second pixel definition layer is disposed on the side of the encapsulation layer opposite to the first pixel definition layer, and the orthographic projection of the second pixel definition layer on the substrate covers the orthographic projection of the encapsulation layer on the substrate.

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