Display substrate and manufacturing method thereof, and display device

Abstract

The present invention provides a display substrate and a manufacturing method thereof, and a display device, which belong to the field of display technology. The display substrate includes: a driving substrate; a first pixel defining layer and a spacer pattern located on the driving substrate, the first pixel defining layer is made of a lyophilic material, and the spacer pattern is located in the gap between adjacent first pixel defining layers; a second pixel defining layer located on the side of the first pixel defining layer and the spacer pattern away from the driving substrate, the second pixel defining layer is made of a lyophobic material, and the first pixel defining layer and the second pixel defining layer define a plurality of pixel areas; wherein the orthographic projection of the spacer pattern on the driving substrate is located within the orthographic projection of the second pixel defining layer on the driving substrate. The technical solution of the present invention can improve the luminous quality of the display substrate.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display substrate and a manufacturing method thereof, and a display device. Background Art

[0002] The OLED (Organic Light-Emitting Diode) display backplane is composed of a glass substrate, an anode, an organic light-emitting layer, and a cathode. The thin and transparent ITO anode and the metal cathode sandwich the organic light-emitting layer. When the voltage is injected into the holes of the anode and the electrons from the cathode, they combine in the organic light-emitting layer, and the organic material in the organic light-emitting layer is stimulated to emit light. In the preparation of the light-emitting diode display backplane, a photoresist is coated on the glass substrate, and after exposure and development, a pixel define layer (Pixel define layer, PDL) is formed to define the pixel area. Then, droplets of light-emitting material are dripped into the pixel area by printing technology. In the related art, the printed droplets have uneven thickness and induce color mixing. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a display substrate and a manufacturing method thereof, and a display device, which can make the luminescent material spread on the display substrate and improve the luminescent quality of the display substrate.

[0004] To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0005] In one aspect, a display substrate is provided, comprising:

[0006] Driver substrate;

[0007] A first pixel defining layer and a spacer pattern located on the driving substrate, wherein the first pixel defining layer is made of a lyophilic material, and the spacer pattern is located in a gap between adjacent first pixel defining layers;

[0008] a second pixel defining layer located on a side of the first pixel defining layer and the spacer pattern away from the driving substrate, the second pixel defining layer being made of a liquid-repellent material, and the first pixel defining layer and the second pixel defining layer defining a plurality of pixel regions;

[0009] The orthographic projection of the spacer pattern on the driving substrate is located within the orthographic projection of the second pixel defining layer on the driving substrate.

[0010] In some embodiments, the spacer pattern extends along a first direction, a width of the spacer pattern in a second direction is smaller than a spacing of the first pixel defining layer in the second direction, and the second direction is perpendicular to the first direction.

[0011] In some embodiments, a surface height of the spacer pattern is not lower than a surface height of the first pixel defining layer.

[0012] In some embodiments, a surface height of the spacer pattern is the same as a surface height of the first pixel defining layer.

[0013] In some embodiments, a minimum distance between the spacer pattern and the adjacent first pixel defining layer in the second direction is 1.5-2.5 um.

[0014] In some embodiments, an orthographic projection of the first pixel defining layer on the driving substrate and an orthographic projection of the second pixel defining layer on the driving substrate have an overlapping region, and a width of the overlapping region in the second direction is 3-5 um.

[0015] In some embodiments, the lyophilic material used to prepare the first pixel defining layer is a lyophilic resin, and the lyophobic material used to prepare the second pixel defining layer is a fluororesin.

[0016] An embodiment of the present invention provides a display device including the display substrate as described above.

[0017] An embodiment of the present invention provides a method for manufacturing a display substrate, comprising:

[0018] Providing a drive substrate;

[0019] forming a first pixel defining layer and a spacer pattern on the driving substrate, wherein the first pixel defining layer is made of a lyophilic material, and the spacer pattern is located in a gap between adjacent first pixel defining layers;

[0020] forming a second pixel defining layer, wherein the second pixel defining layer is made of a liquid-repellent material, and the first pixel defining layer and the second pixel defining layer define a plurality of pixel regions;

[0021] The orthographic projection of the spacer pattern on the driving substrate is located within the orthographic projection of the second pixel defining layer on the driving substrate.

[0022] In some embodiments, forming the second pixel defining layer includes:

[0023] The pattern of the second pixel defining layer is formed by using a fluorine-free resin, and the formed pattern of the second pixel defining layer is subjected to a fluorination treatment.

[0024] The embodiments of the present invention have the following beneficial effects:

[0025] In the above scheme, a spacer pattern is arranged in the gap between adjacent first pixel defining layers, and then a second pixel defining layer is formed. Since there is a spacer pattern in the gap between the first pixel defining layers, the surface flatness and thickness uniformity of the second pixel defining layer in the area can be improved, thereby avoiding color mixing problems caused by mixing of light-emitting materials between adjacent pixels and improving the display quality of the display substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic plan view showing a substrate;

[0027] Figure 2 A schematic diagram of mixing light-emitting materials of adjacent pixels in the related art;

[0028] Figure 3 A schematic diagram of uneven thickness of the second pixel defining layer in the related art;

[0029] Figure 4 A schematic diagram of the process of making a display substrate for related technologies;

[0030] Figure 5 and Figure 6 It is a schematic diagram of manufacturing a display substrate according to an embodiment of the present invention.

[0031] Reference numerals

[0032] 01 First electrode

[0033] 02 First pixel definition layer

[0034] 03 Second pixel definition layer

[0035] 04 Driver board

[0036] 05 Spacer Graphics DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0038] When manufacturing an OLED display substrate, the inkjet printing process requires that a pixel definition layer be made on the first electrode of the substrate in advance to limit the ink droplets to flow precisely into the specified pixels. The pixel definition layer requires a liquid-repellent material with a relatively small surface energy to ensure that the ink droplets spread within the pixel without overflowing the area outside the pixel. However, due to the difference in surface energy between the ink droplets and the pixel definition layer at the contact point, the large slope angle of the pixel definition layer, and the drying behavior of the ink droplets themselves, the ink droplets are prone to form an uneven film with thin edges and thick middles after drying, which is also known as the coffee ring effect. The direct disadvantage caused by this type of coffee ring effect is the presence of holes at the edge of the pixel and leakage, followed by uneven brightness within the pixel.

[0039] In order to avoid the disadvantages caused by the coffee ring effect in pixels, a double-layer pixel boundary layer structure is generally used to avoid it. Figure 1 As shown, a first electrode 01 , a first pixel defining layer 02 and a second pixel defining layer 03 are formed on the driving substrate. Figure 2 for Figure 1 Schematic diagram of the cross section in the AA direction, Figure 3 for Figure 1 A schematic cross-sectional view in the BB direction. In the related art, when manufacturing a display substrate, such as Figure 4 As shown, a driving circuit structure is fabricated on a base substrate to form a driving substrate 04; a flat layer is then fabricated, and a first electrode 02 is then fabricated on the flat layer; a first lyophilic pixel defining layer 02 is then fabricated, and finally a second lyophobic pixel defining layer 03 is fabricated. The second pixel defining layer 03 overlaps the first pixel defining layer 02 to a certain extent, and the width L1 of the overlapping region perpendicular to its own extension direction is approximately between 3-5um. After the second pixel defining layer 03 is fabricated, due to the gap between the first pixel defining layers 02, there is an obvious depression in the center of the second pixel defining layer 03, as shown in FIG. Figure 2 As shown in the figure, it is easy to induce color mixing of ink droplets with poor landing accuracy; in addition, Figure 1 In the BB direction shown, the second pixel defining layer 03 has obvious uneven thickness, such as Figure 3 As shown, the maximum thickness difference can reach more than 0.5um, and there is a high probability that the ink will overflow at the lowest thickness point of the second pixel defining layer 03, resulting in cross-color.

[0040] The embodiments of the present invention provide a display substrate and a manufacturing method thereof, and a display device, which can make a luminescent material spread on the display substrate and improve the luminescent quality of the display substrate.

[0041] An embodiment of the present invention provides a display substrate, such as Figure 5 and Figure 6 As shown, including:

[0042] Driver substrate;

[0043] A first pixel defining layer 02 and a spacer pattern 05 located on the driving substrate, wherein the first pixel defining layer 02 is made of a lyophilic material, and the spacer pattern 05 is located in a gap between adjacent first pixel defining layers 02;

[0044] A second pixel defining layer 03 located at a side of the first pixel defining layer 02 and the spacer pattern 05 away from the driving substrate, the second pixel defining layer 03 is made of a liquid-repellent material, and the first pixel defining layer 02 and the second pixel defining layer 03 define a plurality of pixel regions;

[0045] The orthographic projection of the spacer pattern 05 on the driving substrate is located within the orthographic projection of the second pixel defining layer 03 on the driving substrate.

[0046] In this embodiment, a spacer pattern is provided in the gap between adjacent first pixel defining layers, and a second pixel defining layer is subsequently formed. Since there is a spacer pattern in the gap between the first pixel defining layers, the surface flatness and thickness uniformity of the second pixel defining layer in the area can be improved, thereby avoiding color mixing problems caused by mixing of light-emitting materials between adjacent pixels and improving the display quality of the display substrate.

[0047] In some embodiments, such as Figure 5 As shown, the spacer pattern 05 extends along the first direction (the direction perpendicular to the CC direction), and the width of the spacer pattern 05 in the second direction (the direction parallel to the CC direction) is less than the spacing of the first pixel defining layer 02 in the second direction, and the second direction is perpendicular to the first direction, that is, the width of the spacer pattern 05 is less than the spacing between adjacent first pixel defining layers 02, so that the first pixel defining layer 02 does not contact the spacer pattern 05, but there is a distance L2 between the spacer pattern 05 and the spacer pattern 05, and L2 is the minimum distance between the spacer pattern 05 and the adjacent first pixel defining layer 02 in the second direction. In this way, after the spacer pattern 05 is made, when the first pixel defining layer 02 is subsequently made, the spacer pattern 05 made first affects the morphology of the first pixel defining layer 02, and finally affects the spreading of the ink droplets in the pixel. According to the manufacturing accuracy of the exposure machine, L2 can be set between 1.5 and 2.5um.

[0048] In this embodiment, due to the existence of the spacer pattern 05, the thickness uniformity of the second pixel defining layer in the extending direction of the spacer pattern 05 can be greatly improved, and the phenomenon of local overflow and color bleeding can be further curbed.

[0049] In this embodiment, the spacer pattern 05 can be made before the first pixel defining layer 02, or after the first pixel defining layer 02, or simultaneously with the first pixel defining layer 02. The spacer pattern 05 can be made of the same material as the first pixel defining layer 02, or a different material from the first pixel defining layer 02.

[0050] The surface height of the spacer pattern 05 can be close to or equal to the surface height of the first pixel defining layer 02, the surface height of the spacer pattern 05 can be slightly greater than the surface height of the first pixel defining layer 02, or slightly less than the surface height of the first pixel defining layer 02. Preferably, the surface height of the spacer pattern 05 is not less than the surface height of the first pixel defining layer 02, so as to avoid a depression in the center of the second pixel defining layer 03 to be manufactured subsequently. Specifically, the surface height of the spacer pattern 05 can be equal to the surface height of the first pixel defining layer 02, so as to ensure that the surface morphology of the second pixel defining layer 03 to be manufactured subsequently is flat.

[0051] In some embodiments, such as Figure 6 As shown, there is an overlapping area between the orthographic projection of the first pixel defining layer 02 on the driving substrate and the orthographic projection of the second pixel defining layer 03 on the driving substrate, and the width of the overlapping area in the second direction is 3-5 um.

[0052] This can ensure that the surface flatness of the second pixel defining layer 03 is greatly improved, and there may even be a slight bulge, which is conducive to the separation of ink droplets of adjacent pixels on the surface of the second pixel defining layer 03 and reduces the color mixing problem caused by mixing between ink droplets of adjacent pixels with poor landing accuracy.

[0053] In this embodiment, the second pixel defining layer 03 covers the spacer pattern 05, and the orthographic projection area of ​​the second pixel defining layer 03 on the driving substrate is larger than the orthographic projection area of ​​the spacer pattern 05 on the driving substrate to avoid the second pixel defining layer from being broken.

[0054] Specifically, the height of the spacer graphic 05 is 0.1-10um, the fillet angle of the edge of the spacer graphic 05 is 10°-70°, the edge of the spacer graphic 05 is provided with a rounded corner to avoid the fault of the second pixel defining layer 03, the height of the spacer graphic 05 can be 0.1um, 1um, 2um, 3um, 4um, 5um, 6um, 7um, 8um, 9um, 10um; the fillet angle of the edge of the spacer graphic 05 can be 10°, 20°, 30°, 40°, 50°, 60°, 70°.

[0055] Specifically, the height of the spacer pattern 05 is 0.5-1.5 um, and the height of the spacer pattern 05 can be 0.5 um, 1 um, or 1.5 um.

[0056] Specifically, the fillet angle of the edge of the spacer pattern 05 is 30°-40°, and the fillet angle of the edge of the spacer pattern 05 can be 30°, 35°, or 40°.

[0057] In a preferred embodiment, along a direction perpendicular to the driving substrate, the sum of the heights of the first pixel defining layer 02 and the second pixel defining layer 03 is 0.1um-100um, and the sum of the heights of the first pixel defining layer 02 and the second pixel defining layer 03 can be optionally 0.1um, 1um, 10um, 20um, 30um, 40um, 50um, 60um, 70um, 80um, 90um, 100um.

[0058] Specifically, the sum of the heights of the first pixel defining layer 02 and the second pixel defining layer 03 is 0.5um-10um, and the sum of the heights of the first pixel defining layer 02 and the second pixel defining layer 03 can be selected from 0.5um, 1um, 2um, 3um, 4um, 5um, 6um, 7um, 8um, 9um, and 10um.

[0059] Specifically, along the direction perpendicular to the driving substrate, the height of the first pixel defining layer 02 is 0.1-10um, and the thickness of the second pixel defining layer 03 is 0.5-10um. The height of the first pixel defining layer 02 can be selected from 0.1um, 1um, 2um, 3um, 4um, 5um, 6um, 7um, 8um, 9um, and 10um, and the thickness of the second pixel defining layer 03 is 0.5um, 1um, 2um, 3um, 4um, 5um, 6um, 7um, 8um, 9um, and 10um.

[0060] In some embodiments, the lyophilic material used to prepare the first pixel defining layer is a lyophilic resin, such as silicon oxide. When ink droplets drip into or flow into the area defined by the first pixel defining layer 02, the first pixel defining layer 02 prepared by the lyophilic resin can play a role in leveling the ink droplets. The ink droplets are fully and completely spread in the area defined by the first pixel defining layer 02, avoiding defects caused by incomplete spreading of the ink droplets, thereby improving the luminous quality.

[0061] In some embodiments, the liquid-repellent material used to prepare the second pixel defining layer is a fluororesin. The liquid-repellent material used to prepare the second pixel defining layer 03 is a fluororesin. When the ink droplets drip or flow into the area defined by the second pixel defining layer 03, since the second pixel defining layer 03 with liquid-repellent property is located on the first pixel defining layer 02 with liquid-philic property, the microscopic repulsion between the two will enable the ink droplets to fully spread in the area defined by the first pixel defining layer 02 without overflowing, that is, without flowing out of the pixel area, thereby avoiding contamination of the display substrate.

[0062] An embodiment of the present invention provides a display device including the display substrate as described above.

[0063] The display device includes but is not limited to: a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply. Those skilled in the art will appreciate that the structure of the above-mentioned display device does not constitute a limitation on the display device, and the display device may include more or less of the above-mentioned components, or a combination of certain components, or different component arrangements. In an embodiment of the present invention, the display device includes but is not limited to a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.

[0064] The display device may be any product or component with a display function, such as a television, a monitor, a digital photo frame, a mobile phone, a tablet computer, etc., wherein the display device further includes a flexible circuit board, a printed circuit board and a backplane.

[0065] The display device of this embodiment includes the display substrate provided by any of the above-mentioned technical solutions. Since the pixel area of ​​the display substrate has good luminous uniformity and a long device life, the display device including the display substrate provided by any of the above-mentioned technical solutions has good luminous quality and a long service life.

[0066] An embodiment of the present invention provides a method for manufacturing a display substrate, comprising:

[0067] Providing a drive substrate;

[0068] forming a first pixel defining layer and a spacer pattern on the driving substrate, wherein the first pixel defining layer is made of a lyophilic material, and the spacer pattern is located in a gap between adjacent first pixel defining layers;

[0069] forming a second pixel defining layer, wherein the second pixel defining layer is made of a liquid-repellent material, and the first pixel defining layer and the second pixel defining layer define a plurality of pixel regions;

[0070] The orthographic projection of the spacer pattern on the driving substrate is located within the orthographic projection of the second pixel defining layer on the driving substrate.

[0071] In this embodiment, a spacer pattern is formed in the gap between adjacent first pixel defining layers, and then a second pixel defining layer is formed. Since there is a spacer pattern in the gap between the first pixel defining layers, the surface flatness and thickness uniformity of the second pixel defining layer in the area can be improved, thereby avoiding color mixing problems caused by mixing of light-emitting materials between adjacent pixels and improving the display quality of the display substrate.

[0072] In some embodiments, such as Figure 5As shown, the spacer pattern 05 extends along the first direction (the direction perpendicular to the CC direction), and the width of the spacer pattern 05 in the second direction (the direction parallel to the CC direction) is less than the spacing of the first pixel defining layer 02 in the second direction, and the second direction is perpendicular to the first direction, that is, the width of the spacer pattern 05 is less than the spacing between adjacent first pixel defining layers 02, so that the first pixel defining layer 02 does not contact the spacer pattern 05, but there is a distance L2 between the spacer pattern 05 and the spacer pattern 05, and L2 is the minimum distance between the spacer pattern 05 and the adjacent first pixel defining layer 02 in the second direction. In this way, after the spacer pattern 05 is made, when the first pixel defining layer 02 is subsequently made, the spacer pattern 05 made first affects the morphology of the first pixel defining layer 02, and finally affects the spreading of the ink droplets in the pixel. According to the manufacturing accuracy of the exposure machine, L2 can be set between 1.5 and 2.5um.

[0073] In this embodiment, due to the existence of the spacer pattern 05, the thickness uniformity of the second pixel defining layer in the extending direction of the spacer pattern 05 can be greatly improved, and the phenomenon of local overflow and color bleeding can be further curbed.

[0074] In this embodiment, the spacer pattern 05 can be made before the first pixel defining layer 02, or after the first pixel defining layer 02, or simultaneously with the first pixel defining layer 02. The spacer pattern 05 can be made of the same material as the first pixel defining layer 02, or a different material from the first pixel defining layer 02.

[0075] In some embodiments, in order to save the number of patterning processes and simplify the manufacturing process, the spacer pattern 05 and the first pixel defining layer 02 can be formed simultaneously through one patterning process.

[0076] The surface height of the spacer pattern 05 can be close to or equal to the surface height of the first pixel defining layer 02, the surface height of the spacer pattern 05 can be slightly greater than the surface height of the first pixel defining layer 02, or slightly less than the surface height of the first pixel defining layer 02. Preferably, the surface height of the spacer pattern 05 is not less than the surface height of the first pixel defining layer 02, so as to avoid a depression in the center of the second pixel defining layer 03 to be manufactured subsequently. Specifically, the surface height of the spacer pattern 05 can be equal to the surface height of the first pixel defining layer 02, so as to ensure that the surface morphology of the second pixel defining layer 03 to be manufactured subsequently is flat.

[0077] In some embodiments, such as Figure 6 As shown, there is an overlapping area between the orthographic projection of the first pixel defining layer 02 on the driving substrate and the orthographic projection of the second pixel defining layer 03 on the driving substrate, and the width of the overlapping area in the second direction is 3-5 um.

[0078] This can ensure that the surface flatness of the second pixel defining layer 03 is greatly improved, and there may even be a slight bulge, which is conducive to the separation of ink droplets of adjacent pixels on the surface of the second pixel defining layer 03 and reduces the color mixing problem caused by mixing between ink droplets of adjacent pixels with poor landing accuracy.

[0079] like Figure 6 As shown, in the present embodiment, when manufacturing the display substrate, the driving circuit structure is first manufactured on the base substrate, and then the flat layer is manufactured, and then the first electrode 01 is manufactured. The first electrode is usually an anode. Since OLED devices have two types, bottom-emitting and top-emitting, a bottom-emitting device structure is formed by setting a transparent anode and a reflective cathode structure, and conversely, a top-emitting device structure is formed by a transparent cathode and a reflective anode structure. Therefore, the selection of anode materials is different according to different device structures. Usually, the anode material is selected from transparent or translucent materials with high work functions such as indium tin oxide (ITO), silver (Ag), nickel oxide (NiO), aluminum (Al), and graphene. The specific embodiment of the present invention manufactures the anode by a magnetron sputtering method. Of course, in the actual production process, the anode can also be manufactured by other methods. The specific manufacturing process of the anode is the same as that of the prior art, and will not be repeated here. Then, the spacer pattern 05 is made, and the width of the spacer pattern 05 needs to be smaller than the distance between adjacent first pixel defining layers 02; then the first pixel defining layer 02 is made, and the thickness of the first pixel defining layer 02 can be consistent with the thickness of the spacer pattern 05, so as to pave the way for the smooth surface morphology of the second pixel defining layer 03. Finally, the second pixel defining layer 03 is made, and there is an overlapping area between the second pixel defining layer 03 and the first pixel defining layer 02, so that the overall surface morphology of the second pixel defining layer 03 made in this way can be greatly improved, and there may even be a slight protrusion, which is more conducive to the separation of ink droplets of adjacent pixels on the second pixel defining layer 03, and reduces the color mixing problem caused by the mixing of ink droplets with poor landing accuracy of adjacent pixels.

[0080] The cross-sectional shape of the first pixel defining layer 02 in the specific embodiment of the present invention may be a regular trapezoid. Of course, the cross-sectional shape of the first pixel defining layer 02 in the specific embodiment of the present invention may also be other shapes. The specific embodiment of the present invention does not limit the specific shape of the cross-sectional shape of the first pixel defining layer 02. Specifically, in order to make the cross-sectional shape of the first pixel defining layer 02 in the specific embodiment of the present invention a regular trapezoid, it can be achieved by accurately adjusting the baking temperature before exposure, the exposure energy during exposure, the distance between the mask and the substrate, and the baking temperature after exposure.

[0081] In some embodiments, forming the second pixel defining layer includes:

[0082] The pattern of the second pixel defining layer is formed by using a fluorine-free resin, and the formed pattern of the second pixel defining layer is subjected to a fluorination treatment.

[0083] Preferably, the material forming the pattern of the second pixel defining layer 03 in the specific embodiment of the present invention is a fluorine-free resin. Specifically, the material forming the pattern of the second pixel defining layer 03 is a polyimide, acrylic resin, or organic silicon or other materials containing carbon-hydrogen bonds, hydroxyl groups, and amino functional groups.

[0084] When the material forming the pattern of the second pixel defining layer 03 in the specific embodiment of the present invention is a fluorine-free resin, the characteristic of the material is lyophilicity, and the characteristic requirement of the second pixel defining layer 03 produced by the specific embodiment of the present invention is lyophobicity. Therefore, when the material forming the pattern of the second pixel defining layer 03 in the specific embodiment of the present invention is a fluorine-free resin, after the pattern of the second pixel defining layer is formed, the method further includes: fluorinating the pattern of the second pixel defining layer so that the second pixel defining layer has lyophobic characteristics. Preferably, the gas used in the fluorination treatment of the pattern of the second pixel defining layer in the specific embodiment of the present invention is CxFy gas, and x and y are integers greater than or equal to 1. Specifically, the gas used in the fluorination treatment of the pattern of the second pixel defining layer in the specific embodiment of the present invention is CF4 gas, and CF4 gas fluorinates the surface of the second pixel defining layer material, and the hydroxyl, amino, hydrogen of the organic resin and the CF4 gas undergo a substitution reaction, thereby forming a fluorinated resin layer on the surface of the organic resin, and the surface energy of the fluorinated resin layer is sharply reduced, so that the second pixel defining layer has lyophobic characteristics.

[0085] Of course, the material forming the pattern of the second pixel defining layer 03 in the specific embodiment of the present invention may also be a fluorine-containing resin, so that the pattern of the second pixel defining layer is directly formed without the need for fluorination treatment of the pattern of the second pixel defining layer.

[0086] Afterwards, a light-emitting layer is fabricated on the base substrate on which the first pixel defining layer and the second pixel defining layer are fabricated. The specific fabrication method of the light-emitting layer in the specific embodiment of the present invention is the same as that in the prior art, and will not be described in detail here. Next, a cathode layer is fabricated on the base substrate on which the light-emitting layer is fabricated. The specific fabrication method of the cathode layer in the specific embodiment of the present invention is the same as that in the prior art, and will not be described in detail here.

[0087] In addition, in the specific embodiment of the present invention, a hole injection layer and / or a hole transport layer may be formed between the anode and the light-emitting layer. The specific method for forming the hole injection layer and / or the hole transport layer is the same as that in the prior art and will not be described in detail here. In the specific embodiment of the present invention, an electron injection layer and / or an electron transport layer may be formed between the light-emitting layer and the cathode layer. The specific method for forming the electron injection layer and / or the electron transport layer is the same as that in the prior art and will not be described in detail here.

[0088] In the various method embodiments of the present invention, the serial numbers of the steps cannot be used to limit the sequence of the steps. For ordinary technicians in this field, without paying creative work, changes to the sequence of the steps are also within the protection scope of the present invention.

[0089] It should be noted that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments, since they are basically similar to the product embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the product embodiments.

[0090] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0091] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “under” another element, it can be “directly on” or “under” the other element or intervening elements may be present.

[0092] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0093] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A display substrate, characterized in that: include: Driver substrate; A first pixel defining layer and a spacer pattern located on the driving substrate, wherein the first pixel defining layer is made of a lyophilic material, and the spacer pattern is located in a gap between adjacent first pixel defining layers; a second pixel defining layer located on a side of the first pixel defining layer and the spacer pattern away from the driving substrate, the second pixel defining layer being made of a liquid-repellent material, and the first pixel defining layer and the second pixel defining layer defining a plurality of pixel regions; Wherein, the orthographic projection of the spacer pattern on the driving substrate is located within the orthographic projection of the second pixel defining layer on the driving substrate; The spacer pattern extends along the first direction, the width of the spacer pattern in the second direction is smaller than the spacing of the first pixel defining layers in the second direction, the second direction is perpendicular to the first direction, and the minimum distance between the spacer pattern and the adjacent first pixel defining layer in the second direction is 1.5 to 2.5 um.

2. The display substrate according to claim 1, characterized in that: The surface height of the spacer pattern is not lower than the surface height of the first pixel defining layer.

3. The display substrate according to claim 2, characterized in that: The surface height of the spacer pattern is the same as the surface height of the first pixel defining layer.

4. The display substrate according to claim 1, characterized in that: An orthographic projection of the first pixel defining layer on the driving substrate and an orthographic projection of the second pixel defining layer on the driving substrate have an overlapping area, and a width of the overlapping area in the second direction is 3-5 um.

5. The display substrate according to claim 1, characterized in that: The lyophilic material used to prepare the first pixel defining layer is a lyophilic resin, and the lyophobic material used to prepare the second pixel defining layer is a fluororesin.

6. A display device, characterized in that: The display substrate comprises the display substrate as claimed in any one of claims 1 to 5.

7. A method for manufacturing a display substrate, characterized in that: include: Providing a drive substrate; forming a first pixel defining layer and a spacer pattern on the driving substrate, wherein the first pixel defining layer is made of a lyophilic material, and the spacer pattern is located in a gap between adjacent first pixel defining layers; forming a second pixel defining layer, wherein the second pixel defining layer is made of a liquid-repellent material, and the first pixel defining layer and the second pixel defining layer define a plurality of pixel regions; Wherein, the orthographic projection of the spacer pattern on the driving substrate is located within the orthographic projection of the second pixel defining layer on the driving substrate; The spacer pattern extends along the first direction, the width of the spacer pattern in the second direction is smaller than the spacing of the first pixel defining layers in the second direction, the second direction is perpendicular to the first direction, and the minimum distance between the spacer pattern and the adjacent first pixel defining layer in the second direction is 1.5 to 2.5 um.

8. The method for manufacturing a display substrate according to claim 7, characterized in that: Forming the second pixel defining layer includes: The pattern of the second pixel defining layer is formed by using a fluorine-free resin, and the formed pattern of the second pixel defining layer is subjected to a fluorination treatment.

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