Display substrate and display device

Abstract

The invention discloses a display substrate and a display device. A first blocking part and a second blocking part are arranged, the second blocking part is controlled to be located on the periphery of the first blocking part, a gap is formed between the second blocking part and the first blocking part, and a notch is formed between the second blocking part and a driving substrate or a pixel limiting layer. The orthographic projection of the second blocking part on the driving substrate completely covers the orthographic projection of the notch on the driving substrate, so that the upper part of the notch is completely covered by the second blocking part, and the two sides of the notch are completely shielded by the first blocking part or the second blocking part. When evaporation of the luminescent material is carried out, the luminescent material cannot enter the notch no matter which angle the luminescent material is sprayed, so that when evaporation of the luminescent material of the luminescent layer is carried out, the arrangement of the notch can cut off the luminescent layer, and the luminescent layer is broken at the position of the notch; in this way, the light-emitting layer between every two adjacent pixel openings is discontinuous, and pixel crosstalk between every two adjacent sub-pixels is completely isolated.

Description

Technical Field

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

[0002] Organic light-emitting diodes (OLEDs) have been widely used in mobile phones and wearable products. Excellent display effects are a must-have performance of OLEDs. However, due to the fact that OLEDs have some common layers, there will be more or less leakage current between different sub-pixels, i.e., crosstalk. Therefore, how to effectively solve the crosstalk between adjacent sub-pixels is an urgent problem to be solved. Summary of the invention

[0003] In view of this, an object of the present application is to provide a display substrate and a display device.

[0004] Based on the above objectives, the first aspect of the present application provides a display substrate, including:

[0005] Driver substrate;

[0006] A pixel defining layer is disposed on the driving substrate, wherein a plurality of pixel openings are arranged in an array on the pixel defining layer, and a first electrode layer is disposed in each of the pixel openings;

[0007] A blocking structure, comprising a first blocking portion and a second blocking portion, wherein the first blocking portion is located between two adjacent pixel openings, the second blocking portion is located at the periphery of the first blocking portion and a gap is formed between the second blocking portion and the first blocking portion, a notch is formed between the second blocking portion and the drive substrate or the pixel defining layer, the notch is connected to the gap, and an orthographic projection of the second blocking portion on the drive substrate completely covers an orthographic projection of the notch on the drive substrate;

[0008] The light-emitting layer covers the pixel defining layer, the first electrode layer and the blocking structure and is separated by the gap.

[0009] Optionally, the side of the driving substrate close to the pixel defining layer includes a plurality of partition grooves, the first blocking portion is located in the partition groove, the second blocking portion is located between the driving substrate and the pixel defining layer, and the orthographic projection of the second blocking portion on the driving substrate covers the orthographic projection of the edge of the partition groove on the driving substrate to form the gap between the second blocking portion and the bottom wall of the partition groove.

[0010] Optionally, the first blocking portion includes a first surface disposed away from the driving substrate, and an orthographic projection of the first surface on the driving substrate covers an orthographic projection of an edge of the second blocking portion on the driving substrate.

[0011] Optionally, the first blocking portion includes a first surface arranged away from the driving substrate, the orthographic projection of the first surface on the driving substrate has no overlap with the orthographic projection of the second blocking portion on the driving substrate, the depth of the partition groove is greater than the thickness of the light-emitting layer, wherein the depth direction and the thickness direction are both perpendicular to the direction of the driving substrate.

[0012] Optionally, the second blocking portion includes a second surface disposed away from the driving substrate, there is a height difference between the second surface and the first surface, and the first surface is located on a side of the second surface away from the driving substrate.

[0013] Optionally, the height difference is greater than or equal to 0.5 times the sum of the thickness of the second blocking portion and the depth of the partition groove, wherein both the depth direction and the thickness direction are perpendicular to the drive substrate.

[0014] Optionally, the first blocking portion and the second blocking portion are both located on the pixel defining layer and between two adjacent pixel openings, and the side wall of the second blocking portion is inclined to form the gap between the side wall and the pixel defining layer.

[0015] Optionally, the first blocking portion includes a first surface disposed away from the drive substrate, the second blocking portion includes a second surface disposed away from the drive substrate, and an orthographic projection of the first surface on the drive substrate covers an orthographic projection of an edge of the second surface on the drive substrate.

[0016] Optionally, the first blocking portion includes a first surface disposed away from the driving substrate, the second blocking portion includes a second surface disposed away from the driving substrate, the orthographic projection of the first surface on the driving substrate and the orthographic projection of the second surface on the driving substrate have no overlap, the height of the notch is greater than the thickness of the light-emitting layer, and the height direction and the thickness direction are perpendicular to the direction of the driving substrate.

[0017] Optionally, there is a height difference between the second surface and the first surface, and the first surface is located on a side of the second surface away from the driving substrate.

[0018] Optionally, the height difference is greater than or equal to 0.5 times the thickness of the second blocking portion, wherein the thickness direction is a direction perpendicular to the drive substrate.

[0019] Optionally, the first blocking portion also includes a third surface arranged opposite to the first surface, the orthographic projection of the third surface on the driving substrate is located within the orthographic projection of the first surface on the driving substrate, the distance between the edge of the orthographic projection of the first surface on the driving substrate and the edge of the orthographic projection of the third surface on the driving substrate is L, the thickness of the first blocking portion is H, L≧1 / 3H, wherein the thickness direction is the direction perpendicular to the driving substrate.

[0020] A second aspect of the present application provides a display device, comprising the display substrate described in any one of the first aspects above.

[0021] From the above, it can be seen that the display substrate and display device provided by the present application, by setting a first blocking portion and a second blocking portion, control the second blocking portion to be located at the periphery of the first blocking portion and form a gap with the first blocking portion, a gap is formed between the second blocking portion and the driving substrate or the pixel defining layer, and the orthographic projection of the second blocking portion on the driving substrate completely covers the orthographic projection of the gap on the driving substrate, so that the top of the gap is completely covered by the second blocking portion, and the two sides of the gap are completely blocked by the first blocking portion or the second blocking portion. In specific implementation, when the luminescent material is evaporated, no matter from which angle the luminescent material is sprayed, the luminescent material cannot enter the gap, so that when the luminescent material of the luminescent layer is evaporated, the setting of the gap can isolate the luminescent layer, so that the luminescent layer is disconnected at the position of the gap, so that the luminescent layer between two adjacent pixel openings is discontinuous, and the pixel crosstalk between two adjacent sub-pixels is completely isolated. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A first cross-sectional schematic diagram of a display substrate according to an embodiment of the present application;

[0024] Figure 2 A second cross-sectional schematic diagram of a display substrate according to an embodiment of the present application;

[0025] Figure 3 A third cross-sectional schematic diagram of the display substrate according to the embodiment of the present application;

[0026] Figure 4 A fourth cross-sectional schematic diagram of the display substrate according to an embodiment of the present application;

[0027] Figure 5 is a fifth cross-sectional schematic diagram of the display substrate of the embodiment of the present application;

[0028] Figure 6 A top view of a display substrate according to an embodiment of the present application;

[0029] Figure 7 is a sixth cross-sectional schematic diagram of the display substrate of an embodiment of the present application;

[0030] Figure 8 is a seventh cross-sectional schematic diagram of the display substrate of the embodiment of the present application;

[0031] Fig. 9 is an eighth cross-sectional schematic diagram of the display substrate according to an embodiment of the present application;

[0032] Fig.10 is a ninth cross-sectional schematic diagram of the display substrate according to an embodiment of the present application;

[0033] Fig.11 is a tenth cross-sectional schematic diagram of a display substrate according to an embodiment of the present application;

[0034] Fig.12 is an eleventh cross-sectional schematic diagram of a display substrate according to an embodiment of the present application;

[0035] Fig.13 This is a first cross-sectional schematic diagram during the manufacturing process of a display substrate according to an embodiment of the present application;

[0036] Fig.14 A second cross-sectional schematic diagram during the manufacturing process of the display substrate of an embodiment of the present application;

[0037] Fig.15 A third cross-sectional schematic diagram of a display substrate manufacturing process according to an embodiment of the present application;

[0038] Fig.16 This is a fourth cross-sectional schematic diagram during the manufacturing process of the display substrate in the embodiment of the present application.

[0039] In the figure: 1, driving substrate; 11, driving base; 111, base substrate; 112, gate insulating layer; 113, interlayer insulating layer; 114, source electrode; 115, drain electrode; 116, active layer; 117, gate electrode; 12, planarization layer; 121, partition groove;

[0040] 2. Pixel defining layer; 21. Pixel opening; 3. Blocking structure; 31. First blocking portion; 311. First sub-portion; 312. Second sub-portion; 313. First surface; 314. Third surface; 32. Second blocking portion; 321. Second surface; 4. Gap; 5. Notch; 6. First electrode layer; 7. Light-emitting layer; 8. Partition structure; 9. Isolation groove; 10. Isolation blocking portion. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0042] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of 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.

[0043] Organic light-emitting diodes (OLEDs) have been widely used in mobile phones and wearable products. Excellent display effects are a must-have performance for OLEDs. In order to further reduce the power consumption of OLEDs and increase the brightness of products, stacked OLED products have emerged. However, whether it is a single-layer or stacked OLED, because OLEDs have some common layers, there will be more or less leakage current between different sub-pixels, that is, crosstalk. Especially for stacked OLEDs, the crosstalk between sub-pixels is particularly obvious.

[0044] In this application, in order to reduce the crosstalk between adjacent sub-pixels of OLED, the concept of partition structure design is proposed, and some special structures are used to directly disconnect the light-emitting layer at certain places during the preparation process, thereby reducing the mutual crosstalk between sub-pixels.

[0045] Figure 1 Schematic diagram of the design of the partition structure 8 of the negative adhesive scheme. Figure 1 The structure shown is in the process of OLED coating, so the whole structure is inverted.

[0046] In some embodiments, see Figure 1 As shown, a trapezoidal partition structure 8 is formed on the side of the pixel defining layer 2 facing away from the driving substrate 1 by using negative adhesive. Since the top of the column of the trapezoidal partition structure 8, i.e., the surface facing away from the driving substrate 1, has a larger surface area, the top of the column can act as a blocking portion to prevent the light-emitting material from entering the angle formed between the bottom of the column and the pixel defining layer 2, thereby blocking the light-emitting layer 7.

[0047] The partition structure 8 of the negative photoresist partition solution has excellent morphology, but poor isolation effect. This is because the inclination angle of the side wall of the negative photoresist partition structure 8 is not large enough, and the partition structure 8 at certain positions cannot block the luminescent material in certain evaporation directions, so that the luminescent material is still continuous at the position of the partition structure 8, so the isolation effect is poor. For example, Figure 1 As shown, Figure 1 The middle partition structure 8 is perpendicular to the evaporation source (line source). The partition structure 8 at this position does not block the evaporation material at most angles. Figure 1 In the direction A shown in the figure, the luminescent material evaporated from the direction A can enter the column bottom and the pixel defining layer without any obstruction.

[0048] 2, so that the luminescent material layer is not disconnected at the angle, so that the luminescent layer 7 is still continuous, and the luminescent layer 7 cannot be effectively separated.

[0049] Figure 2 It is an exemplary schematic diagram of the design of the partition structure 8 of the isolation groove 9 scheme.

[0050] In some embodiments, see Figure 2 As shown, an isolation groove 9 is provided on the planarization layer 12, and an isolation barrier 10 is provided on the side of the planarization layer 12 away from the drive substrate 1, a groove is formed between the isolation barrier 10 and the bottom and sidewall of the isolation groove 9, and the inner width of the groove is greater than the opening width of the barrier, and the groove has a certain depth, which is generally greater than the thickness of the entire light-emitting layer 7. In this way, the internally recessed structure plus the height difference can disconnect the light-emitting material in the groove, thereby reducing crosstalk.

[0051] However, the isolation groove 9 solution is affected by the process level, and the isolation effects at different positions may be different. Figure 2 As shown, the evaporation position is the same as Figure 1 If the grooves at certain locations are not deep enough or the depressions are not deep enough, the luminescent material can form a certain continuous structure in the grooves, so that the partition effects at different locations are different. Figure 2As shown, the luminescent material evaporated from the direction B can enter the groove without any hindrance. If the groove is not deep enough, the luminescent material in the groove and the luminescent material outside the groove will form a continuous structure, so that the luminescent layer 7 is still continuous, and the luminescent layer 7 cannot be effectively separated. If the groove is deep enough, the cost of the entire manufacturing process will be higher.

[0052] Therefore, in order to ensure that the light-emitting layer 7 can be effectively isolated at certain positions to solve the crosstalk problem between sub-pixels, the present application is further optimized.

[0053] In some embodiments, see Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the display substrate provided by the present application includes: a driving substrate 1; a pixel defining layer 2, which is arranged on the driving substrate 1, and a plurality of pixel openings 21 are arranged in an array on the pixel defining layer 2, and a first electrode layer 6 is provided in each of the pixel openings 21; a blocking structure 3, including a first blocking portion 31 and a second blocking portion 32, the first blocking portion 31 is located between two adjacent pixel openings 21, the second blocking portion 32 is located at the periphery of the first blocking portion 31 and a gap 4 is formed between the first blocking portion 31, a notch 5 is formed between the second blocking portion 32 and the driving substrate 1 or the pixel defining layer 2, the notch 5 is connected to the gap 4, and the orthographic projection of the second blocking portion 32 on the driving substrate 1 completely covers the orthographic projection of the notch 5 on the driving substrate 1; a light-emitting layer 7, which covers the pixel defining layer 2, the first electrode layer 6 and the blocking structure and is separated by the notch 5.

[0054] Specifically, the driving substrate 1 includes a driving base 11 and a planarization layer 12. The driving substrate 111 includes a base substrate 111 and a driving layer located on the base substrate 111.

[0055] The base substrate 111 may support and protect various components of the display substrate. The base substrate 111 may be formed of glass, quartz, ceramic, or a flexible plastic material. For example, when the base substrate 111 is formed of a plastic material, it may be formed of polyimide (PI).

[0056] The base substrate 111 may be flexible, stretchable, foldable, bendable and / or rollable, so the display substrate may also be flexible, stretchable, foldable, bendable and / or rollable.

[0057] The base substrate 111 includes a display area and a non-display area.

[0058] The display area is an area in the display substrate where an image is displayed. In the display area, a light-emitting unit and various driving elements for driving the light-emitting unit may be provided. For example, the light-emitting unit may include a first electrode, a light-emitting layer 7, and a second electrode. In addition, various elements such as wiring, a capacitor, or a thin film transistor for driving the light-emitting unit may be provided in the display area.

[0059] The display area may include a plurality of sub-pixels arranged in an array. A sub-pixel is the smallest unit for configuring a screen, and each of the plurality of sub-pixels may include a light-emitting unit and a driving circuit. Each of the plurality of sub-pixels may emit light of different wavelengths. For example, the plurality of sub-pixels may include a red sub-pixel, a green sub-pixel, and a blue sub-pixel. However, the plurality of sub-pixels are not limited thereto and may also include a white sub-pixel.

[0060] The driving circuit of the sub-pixel is a circuit for controlling the driving of the light emitting unit. For example, the driving circuit may be configured to include a thin film transistor and a capacitor, but is not limited thereto.

[0061] The non-display area is an area in which no image is displayed, and various components for driving the plurality of sub-pixels provided in the display area may be provided. For example, a driver providing signals for driving the plurality of sub-pixels, a flexible film, etc. may be provided in the non-display area.

[0062] The non-display area may be an area surrounding the display area, but is not limited thereto. For example, the non-display area may be an area extending from the display area.

[0063] The driving layer is disposed on the base substrate 111. The driving layer is a driving element of the display substrate, and is used to determine the light-emitting unit. Exemplarily, the driving layer may include a thin film transistor, which is a driving element of the display substrate. The thin film transistor includes an active layer 116, a gate electrode 117, a source electrode 114, and a drain electrode 115.

[0064] The active layer 116 is disposed on the base substrate 111. The active layer 116 may be made of amorphous, polycrystalline semiconductor materials, oxide semiconductors or organic semiconductor materials. In addition, the active layer 116 includes a channel region in which impurities are not doped, and a source region and a drain region disposed on opposite sides of the communication region and doped with impurities.

[0065] The gate insulating layer is disposed on the active layer 116. The gate insulating layer is a layer for electrically insulating the gate electrode 117 from the active layer 116, and may be formed of an insulating material. For example, the gate insulating layer may be formed as a single layer of silicon nitride (SiNx) or silicon oxide (SiOx) as an inorganic material, or as a multilayer of silicon nitride (SiNx) or silicon oxide (SiOx), but the embodiment is not limited thereto.

[0066] The gate electrode 117 is disposed on the gate insulating layer. The gate electrode 117 may overlap at least some of the active layer 116 and may overlap the channel region. The gate electrode 117 may be any one of a variety of metal materials, for example, any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy of two or more thereof, or a multilayer thereof, but the embodiment is not limited thereto.

[0067] The interlayer insulating layer 113 is disposed on the gate electrode 117 and the gate insulating layer. The interlayer insulating layer 113 may be made of an inorganic insulating material or an organic insulating material.

[0068] A contact hole (not marked in the figure) overlapping at least a portion of the active layer 116 is formed in the gate insulating layer and the interlayer insulating layer 113 .

[0069] The source electrode 114 and the drain electrode 115 are disposed on the interlayer insulating layer 113. The source electrode 114 and the drain electrode 115 are disposed on the same layer and are spaced apart from each other. In addition, the source electrode 114 and the drain electrode 115 are respectively connected to the source region and the drain region of the active layer 116 through contact holes. The source electrode 114 and the drain electrode 115 may be formed of any one or more of a variety of metal materials, for example, any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd) and copper (Cu), or an alloy of two or more thereof, or a multilayer thereof, but the embodiment is not limited thereto.

[0070] As described above, the active layer 116, the gate electrode 117, the source electrode, and the drain electrode constitute a thin film transistor.

[0071] The structure of the thin film transistor is not limited to the aforementioned example, and can be modified to various optional structures. The light emitting diode display may include a switching transistor and a driving transistor, and the aforementioned thin film transistor may be a driving transistor. Although not shown, a switching thin film transistor may be provided.

[0072] The planarization layer 12 is disposed on the thin film transistor and the interlayer insulating layer 113. The planarization layer 12 is used to remove and / or planarize the steps of the aforementioned structure, thereby increasing the light emitting efficiency of the light emitting unit to be formed thereon. A contact hole overlapping at least some of the drain electrode is formed in the planarization layer 12.

[0073] The planarization layer 12 may be formed of polyacrylate resin, epoxy resin, phenol resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene resin, polyphenylene sulfide resin, and / or benzocyclobutene (BCB).

[0074] The arrayed light-emitting units are arranged on the planarization layer 12. The light-emitting units include a first electrode layer 6, a second electrode layer arranged on the first electrode layer 6, and a light-emitting layer 7 arranged between the first electrode layer 6 and the second electrode layer. Here, the light-emitting units can be light-emitting diodes or organic light-emitting diodes.

[0075] The pixel defining layer 2 is arranged on the planarization layer 12, and a plurality of pixel openings 21 are arranged in an array on the pixel defining layer 2, and a first electrode layer 6 is arranged in each of the pixel openings 21, and the first electrode layer 6 is arranged on the planarization layer 12. The first electrode layer 6 can be formed of a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), etc., or formed of a metal such as lithium (Li), calcium (Ca), lithium fluoride / calcium (LiF / Ca), lithium fluoride / aluminum (LiF / Al), aluminum (Al), silver (Ag), magnesium (Mg), gold (Au), etc. The first electrode layer 6 is electrically connected to the drain electrode of the thin film transistor via a contact hole formed in the planarization layer 12 to serve as an anode of the light-emitting unit.

[0076] The first electrode layer 6 may include a first transparent electrode and a second transparent electrode including a transparent conductive material and a semi-transmissive layer disposed between the first transparent electrode and the second transparent electrode to form a microcavity together with the second electrode layer. For example, the first electrode layer 6 may be formed as a multilayer including a layer made of a transparent conductive material and a layer made of a reflective metal material.

[0077] The blocking structure 3 includes a first blocking portion 31 and a second blocking portion 32. The first blocking portion 31 is located between two adjacent pixel openings 21. Exemplarily, the first blocking portion 31 can be located on the pixel defining layer 2 between two adjacent pixel openings 21, or can be located on the planarization layer 12 between two adjacent pixel openings 21. The specific setting is based on actual needs, as long as the first blocking portion 31 is ensured to be located between two adjacent pixel openings 21.

[0078] The second blocking portion 32 is located at the outer periphery of the first blocking portion 31 and a gap 4 is formed between the second blocking portion 32 and the first blocking portion 31. Figure 5 As shown, when the luminescent material is evaporated, the second blocking portion 32 disposed around the first blocking portion 31 can block the luminescent material (such as Figure 5 The first blocking portion 31 can block the luminescent material (as shown in F) from entering the gap 4 between the two, and the first blocking portion 31 can block the luminescent material (as shown in F) emitted from the side to the second blocking portion 32. Figure 5In this way, the amount of luminescent material that finally enters the gap 4 is very small, and only the luminescent material (such as luminescent material) emitted from a specific angle to the gap 4 is blocked. Figure 5 C, D, and E in the figure) can enter the gap 4.

[0079] Furthermore, a gap 5 is formed between the second blocking portion 32 and the driving substrate 11 or the pixel defining layer 2, that is, a gap 5 is formed between the top surface, bottom surface or side wall of the second blocking portion 32 and the driving substrate 11 or the pixel defining layer 2. Exemplarily, the gap 5 can be a gap, that is, a gap is formed between the top surface or bottom surface of the second blocking portion 32 and the top surface of the driving substrate 11 or the pixel defining layer 2; the gap 5 can also be an angle, that is, an angle is formed between the side wall of the second blocking portion 32 and the top surface of the driving substrate 11 or the pixel defining layer 2.

[0080] The orthographic projection of the second blocking portion 32 on the driving substrate 1 completely covers the orthographic projection of the notch 5 on the driving substrate 1. In this way, the notch 5 is completely covered by the second blocking portion 32. When the luminescent material is evaporated, the luminescent material emitted toward the notch 5 from a direction perpendicular to the driving substrate 1 or the luminescent material emitted toward the notch 5 from a direction with a very small angle to the vertical direction will be blocked by the second blocking portion 32, so that the luminescent material cannot enter the notch 5.

[0081] The luminescent material (such as Figure 5 F and G in the figure) will be blocked by the second blocking portion 32 or the first blocking portion 31. Even if the luminous material (such as Figure 5 The light emitting material (as shown in C, D, and E) can only enter the gap 4, but cannot enter the notch 5 blocked by the second blocking portion 32. Therefore, no matter from which angle the luminescent material is sprayed, the luminescent material cannot enter the notch 5. This ensures that when the luminescent material of the luminescent layer 7 is evaporated, the setting of the notch 5 can isolate the luminescent layer 7, so that the luminescent layer 7 is disconnected at the position of the notch 5, so that the luminescent layer 7 between two adjacent pixel openings 21 is discontinuous, and the pixel crosstalk between two adjacent sub-pixels is completely isolated.

[0082] In the present application, by setting the first blocking portion 31 and the second blocking portion 32, the second blocking portion 32 is controlled to be located at the periphery of the first blocking portion 31 and a gap 4 is formed between the second blocking portion 32 and the driving substrate 11 or the pixel defining layer 2, and a gap 5 is formed between the second blocking portion 32 and the driving substrate 11 or the pixel defining layer 2, and the orthographic projection of the second blocking portion 32 on the driving substrate 1 completely covers the orthographic projection of the gap 5 on the driving substrate 1, so that the upper part of the gap 5 is completely covered by the second blocking portion 32, and the two sides of the gap 5 are completely blocked by the first blocking portion 31 or the second blocking portion 32. In a specific implementation, when the luminescent material is evaporated, no matter from which angle the luminescent material is sprayed, the luminescent material cannot enter the gap 5, so that when the luminescent material of the luminescent layer 7 is evaporated, the setting of the gap 5 can isolate the luminescent layer 7, so that the luminescent layer 7 is disconnected at the position of the gap 5, so that the luminescent layer 7 between two adjacent pixel openings 21 is discontinuous, and the pixel crosstalk between two adjacent sub-pixels is completely isolated.

[0083] In some embodiments, the lateral width of the gap 4 should be as small as possible, so as to minimize the amount of light-emitting material entering the gap 4 and ensure the partition effect of the gap 5 on the light-emitting layer 7. However, the lateral width of the gap 4 should be at least greater than or equal to 0.2 μm to facilitate the actual etching process; if the lateral width of the gap 4 is less than 0.2 μm, the size of the gap 4 is too small, which is not conducive to the etching process.

[0084] In some embodiments, see Figure 3 As shown, the side of the driving substrate 1 close to the pixel defining layer 2 includes a plurality of partition grooves 121, the first blocking portion 31 is located in the partition groove 121, the second blocking portion 32 is located between the driving substrate 1 and the pixel defining layer 2, and the orthographic projection of the second blocking portion 32 on the driving substrate 1 covers the orthographic projection of the edge of the partition groove 121 on the driving substrate 1 so that the gap 5 is formed between the second blocking portion 32 and the bottom wall of the partition groove 121.

[0085] Specifically, the planarization layer 12 of the driving substrate 1 includes a plurality of partition grooves 121 on one side thereof close to the pixel defining layer 2 .

[0086] The orthographic projection of the second blocking portion 32 on the driving substrate 1 covers the orthographic projection of the edge of the partition groove 121 on the driving substrate 1 , and the notch 5 is formed between the second blocking portion 32 and the bottom wall of the partition groove 121 , and the second blocking portion 32 completely covers the notch 5 .

[0087] In this way, the upper part of the notch 5 is completely covered and blocked by the second blocking portion 32, the left side of the notch 5 is completely blocked by the second blocking portion 32 and the side wall of the partition groove 121, and the right side of the notch 5 is completely blocked by the first blocking portion 31 located in the partition groove 121. In specific implementation, when the luminescent material is evaporated, no matter from which angle the luminescent material is sprayed, the luminescent material cannot enter the notch 5, so that when the luminescent material of the luminescent layer 7 is evaporated, the setting of the notch 5 can isolate the luminescent layer 7, so that the luminescent layer 7 is disconnected at the position of the notch 5, so that the luminescent layer 7 between two adjacent pixel openings 21 is discontinuous, and the pixel crosstalk between two adjacent sub-pixels is completely blocked.

[0088] In some embodiments, see Figure 3 and Figure 7 As shown, the first blocking portion 31 includes a first surface 313 disposed away from the driving substrate 1 , and the orthographic projection of the first surface 313 on the driving substrate 1 covers the orthographic projection of the edge of the second blocking portion 32 on the driving substrate 1 .

[0089] Specifically, the first blocking portion 31 may be as follows Figure 3 In the inverted trapezoidal structure shown, the side wall of the first blocking portion 31 is inclined, and the orthographic projection of the first surface 313 of the first blocking portion 31 on the driving substrate 1 covers the orthographic projection of the edge of the second blocking portion 32 on the driving substrate 1 .

[0090] The first blocking portion 31 may also be Figure 7 In the structure shown, the first blocking portion 31 includes a first sub-portion 311 and a second sub-portion 312, wherein the second sub-portion 312 is located on a side of the first sub-portion 311 away from the driving substrate 1, the second sub-portion 312 and the first sub-portion 311 are both columnar structures, and the orthographic projection of the second sub-portion 312 on the driving substrate 1 completely covers the orthographic projection of the first sub-portion 311 on the driving substrate 1, and the side wall of the first blocking portion 31 is not inclined, and the first surface 313 is the surface of the second sub-portion 312 on the side away from the driving substrate 1.

[0091] When the first blocking portion 31 includes a first sub-portion 311 and a second sub-portion 312, the first sub-portion 311 and the second sub-portion 312 may be made of the same material or different materials. When the first sub-portion 311 and the second sub-portion 312 are made of different materials, the etching rate of the first sub-portion 311 is greater than the etching rate of the second sub-portion 312, so that in the same etching process, the above structure is obtained based on the difference in etching rates.

[0092] When the orthographic projection of the first surface 313 on the driving substrate 1 covers the orthographic projection of the edge of the second blocking portion 32 on the driving substrate 1, the gap 4 between the first blocking portion 31 and the second blocking portion 32 is also covered by the first surface 313, so that the luminescent material emitted toward the gap 4 from a direction perpendicular to the driving substrate 1 is blocked by the first surface 313 and does not enter the gap 4, thereby further reducing the amount of luminescent material that may enter the gap 4.

[0093] At this time, since the amount of luminescent material that may enter the gap 4 is very small, the amount of luminescent material that can pass through the gap 4 into the partition groove 121 is also very small. In this case, there is no need to limit the depth of the partition groove 121. Even if the depth of the partition groove 121 is shallow, it will not cause the luminescent material in the partition groove 121 and the luminescent material outside the partition groove 121 to form a continuous structure. Therefore, there is no need to strictly control the etching depth of the partition groove 121, which greatly reduces the difficulty of the preparation process and reduces the preparation cost.

[0094] In some embodiments, see Figure 8 As shown, the first blocking portion 31 includes a first surface 313 disposed away from the driving substrate 1, the orthographic projection of the first surface 313 on the driving substrate 1 does not overlap with the orthographic projection of the second blocking portion 32 on the driving substrate 1, the depth of the partition groove 121 is greater than the thickness of the light-emitting layer 7, wherein the depth direction and the thickness direction are both perpendicular to the direction of the driving substrate 1 (i.e. Figure 8 Q direction in ).

[0095] Specifically, the orthographic projection of the first surface 313 on the driving substrate 1 does not overlap with the orthographic projection of the second blocking portion 32 on the driving substrate 1, so that the light-emitting material emitted toward the gap 4 from a direction perpendicular to the driving substrate 1 or a direction with a smaller angle to the vertical direction can all pass through the gap 4 and enter the partition groove 121.

[0096] At this time, if the evaporation angle is all vertical or at an angle of about 0 to 5° to the vertical direction during the evaporation of the light-emitting material, all the light-emitting materials can enter the partition groove 121 through the gap 4 at this angle. Therefore, the depth of the partition groove 121 must continue to be controlled to ensure that the depth of the partition groove 121 is greater than the thickness of the light-emitting layer 7, so that there is still a gap 4 between the top surface of the light-emitting layer 7 in the partition groove 121 and the bottom surface of the second blocking portion 32, that is, the gap 5 is not filled with the light-emitting layer 7. In this way, it can be ensured that the gap 5 can separate the light-emitting layer 7 in the partition groove 121 from the light-emitting layer 7 outside the partition groove 121, so that the light-emitting layer 7 is discontinuous at the gap 5, thereby effectively solving the crosstalk problem between adjacent sub-pixels.

[0097] If the depth of the partition groove 121 is less than or equal to the thickness of the light-emitting layer 7, there is no gap 4 between the top surface of the light-emitting layer 7 in the partition groove 121 and the bottom surface of the second blocking portion 32, that is, the gap 5 is filled with the light-emitting layer 7. In this way, the light-emitting layer 7 in the partition groove 121 and the light-emitting layer 7 outside the partition groove 121 will form a continuous structure and cannot be disconnected, and the crosstalk problem between adjacent sub-pixels cannot be effectively solved.

[0098] In some embodiments, see Fig. 9 As shown, the second blocking portion 32 includes a second surface 321 disposed away from the driving substrate 1 , and there is a height difference between the second surface 321 and the first surface 313 . The first surface 313 is located on a side of the second surface 321 away from the driving substrate 1 .

[0099] Specifically, the first surface 313 is located on the side of the second surface 321 away from the drive substrate 1, that is, the top of the first blocking portion 31 is higher than the top of the second blocking portion 32, so that the first blocking portion 31 can block the entire side wall of the second blocking portion 32 and the top edge close to the first blocking portion 31, so that the luminescent material will not be evaporated onto the entire side wall of the second blocking portion 32 and the top edge close to the first blocking portion 31, thereby ensuring that no luminescent material enters the gap 5 covered by the edge of the second blocking portion 32, ensuring that the light-emitting layer 7 can be isolated at the position of the gap 5, and effectively avoiding crosstalk between two adjacent sub-pixels.

[0100] In some embodiments, the height difference is greater than or equal to 0.5 times the sum of the thickness of the second blocking portion 32 and the depth of the partition groove 121 , wherein both the depth direction and the thickness direction are perpendicular to the driving substrate 1 .

[0101] Specifically, the height difference is Fig. 9 As shown in H2-H1.

[0102] The height difference is greater than or equal to the sum of the thickness of the second blocking portion 32 and the depth of the partition groove 121 (i.e. Fig. 9 In this way, it can be ensured that the height difference between the first surface 313 and the second surface 321 is large enough, and the first blocking portion 31 can effectively block the second blocking portion 32.

[0103] If the height difference is less than the sum of the thickness of the second blocking portion 32 and the depth of the partition groove 121 (i.e. Fig. 9 Thus, the height difference between the first surface 313 and the second surface 321 is small, and the height difference between the two is not large, so the first blocking portion 31 cannot effectively block the side wall of the second blocking portion 32.

[0104] In some embodiments, see Fig.10 and Fig.11 As shown, the first blocking portion 31 and the second blocking portion 32 are both located on the pixel defining layer 2 and between two adjacent pixel openings 21 , and the side wall of the second blocking portion 32 is inclined to form the gap 5 between the side wall and the pixel defining layer 2 .

[0105] Specifically, the side wall of the second blocking portion 32 is inclined to form the gap 5 between the side wall and the pixel defining layer 2, so that the upper side and the left side of the gap 5 are completely covered and blocked by the side wall of the second blocking portion 32. In specific implementation, when the luminescent material is evaporated, the luminescent material emitted toward the gap 5 from a direction perpendicular to the driving substrate 1 or the luminescent material emitted toward the gap 5 from a direction with a small angle to the vertical direction will be blocked by the second blocking portion 32, so that the luminescent material cannot enter the gap 5.

[0106] The luminescent material (such as Fig.11 K and L in the figure) will be blocked by the second blocking portion 32 or the first blocking portion 31. Even if the luminous material (such as Fig.11 H and I in the figure) can only enter the gap 4, but cannot enter the gap 5 blocked by the second blocking portion 32. Therefore, no matter from which angle the luminescent material is sprayed, the luminescent material cannot enter the gap 5. This ensures that when the luminescent material of the luminescent layer 7 is evaporated, the setting of the gap 5 can isolate the luminescent layer 7, so that the luminescent layer 7 is disconnected at the position of the gap 5, so that the luminescent layer 7 between two adjacent pixel openings 21 is discontinuous, and the pixel crosstalk between two adjacent sub-pixels is completely isolated.

[0107] In some embodiments, see Fig.10 As shown, the first blocking portion 31 includes a first surface 313 disposed away from the drive substrate 1, and the second blocking portion 32 includes a second surface 321 disposed away from the drive substrate 1, and the orthographic projection of the first surface 313 on the drive substrate 1 covers the orthographic projection of the edge of the second surface 321 on the drive substrate 1.

[0108] Specifically, when the orthographic projection of the first surface 313 on the driving substrate 1 covers the orthographic projection of the edge of the second surface 321 on the driving substrate 1, the gap 4 between the first blocking portion 31 and the second blocking portion 32 is also covered by the first surface 313, so that the luminescent material emitted toward the gap 4 from a direction perpendicular to the driving substrate 1 is blocked by the first surface 313 and does not enter the gap 4, thereby further reducing the amount of luminescent material that may enter the gap 4.

[0109] At this time, since the amount of luminescent material that may enter the gap 4 is very small, the amount of luminescent material that can enter the gap 4 is also very small. In this case, there is no need to limit the height of the notch 5. Even if the height of the notch 5 is small, the luminescent material inside the notch 5 and the luminescent material outside the notch 5 will not form a continuous structure. Therefore, there is no need to strictly control the etching depth of the notch 5, which greatly reduces the difficulty of the preparation process and reduces the preparation cost.

[0110] In some embodiments, see Fig.12 As shown, the first blocking portion 31 includes a first surface 313 disposed away from the driving substrate 1, the second blocking portion 32 includes a second surface 321 disposed away from the driving substrate 1, the orthographic projection of the first surface 313 on the driving substrate 1 and the orthographic projection of the second surface 321 on the driving substrate 1 do not overlap, the height of the notch 5 is greater than the thickness of the light-emitting layer 7, and the height direction and the thickness direction are perpendicular to the direction of the driving substrate 1.

[0111] Specifically, the orthographic projection of the first surface 313 on the driving substrate 1 does not overlap with the orthographic projection of the second surface 321 on the driving substrate 1, so that the light-emitting material emitted toward the gap 4 from a direction perpendicular to the driving substrate 1 or a direction with a smaller angle to the vertical direction can all pass into the gap 4.

[0112] At this time, if during the evaporation of the light-emitting material, the evaporation angles are all vertical or at an angle of about 0 to 5° to the vertical, all the light-emitting materials can enter the gap 4 at this angle. Therefore, the height of the gap 5 must be controlled to ensure that the height of the gap 5 is greater than the thickness of the light-emitting layer 7. In this way, even if all the light-emitting materials enter the gap 4, the light-emitting material will not fill the gap 5. This ensures that the gap 5 can separate the light-emitting layer 7 inside the gap 5 from the light-emitting layer 7 outside the gap 5, making the light-emitting layer 7 discontinuous at the gap 5, thereby effectively solving the crosstalk problem between adjacent sub-pixels.

[0113] If the height of the gap 5 is less than or equal to the thickness of the light-emitting layer 7, when all the light-emitting materials enter the gap 4, the light-emitting materials will fill the gap 5, so that the light-emitting layer 7 inside the gap 5 and the light-emitting layer 7 outside the gap 5 will form a continuous structure and cannot be disconnected, and the crosstalk problem between adjacent sub-pixels cannot be effectively solved.

[0114] In some embodiments, see Fig.10 As shown, there is a height difference between the second surface 321 and the first surface 313 , and the first surface 313 is located on a side of the second surface 321 away from the driving substrate 1 .

[0115] Specifically, the first surface 313 is located on the side of the second surface 321 away from the drive substrate 1, that is, the top of the first blocking portion 31 is higher than the top of the second blocking portion 32, so that the first blocking portion 31 can block the entire side wall of the second blocking portion 32 and the top edge close to the first blocking portion 31, so that the luminescent material will not be evaporated onto the entire side wall of the second blocking portion 32 and the top edge close to the first blocking portion 31, thereby ensuring that no luminescent material enters the gap 5 covered by the edge of the second blocking portion 32, ensuring that the light-emitting layer 7 can be isolated at the position of the gap 5, and effectively avoiding crosstalk between two adjacent sub-pixels.

[0116] In some embodiments, see Fig.10 As shown, the height difference is greater than or equal to 0.5 times the thickness of the second blocking portion 32 , wherein the thickness direction is a direction perpendicular to the drive substrate 1 .

[0117] Specifically, the height difference is Fig. 9 As shown in H2-H3.

[0118] The height difference is greater than or equal to the thickness of the second blocking portion 32 (i.e. Fig.10 In this way, it can be ensured that the height difference between the first surface 313 and the second surface 321 is large enough, and the first blocking portion 31 can effectively block the second blocking portion 32.

[0119] If the height difference is less than 0.5 times the thickness of the second blocking portion 32 , the height difference between the first surface 313 and the second surface 321 is small, and the height difference between the two is not large, so the first blocking portion 31 cannot effectively block the side wall of the second blocking portion 32 .

[0120] In some embodiments, see Fig. 9 and Fig.10 As shown, the first blocking portion 31 also includes a third surface arranged opposite to the first surface 313, the orthographic projection of the third surface on the driving substrate 1 is located within the orthographic projection of the first surface 313 on the driving substrate 1, the distance between the edge of the orthographic projection of the first surface 313 on the driving substrate 1 and the edge of the orthographic projection of the third surface on the driving substrate 1 is L, the thickness of the first blocking portion 31 is H, L≧1 / 3H, wherein the thickness direction is the direction perpendicular to the driving substrate 1.

[0121] Specifically, the orthographic projection of the third surface on the driving substrate 1 is located within the orthographic projection of the first surface 313 on the driving substrate 1, that is, the first blocking portion 31 is an inverted trapezoidal structure. The setting of this structure, on the one hand, allows the first surface 313 to completely cover the edge of the second surface 321, ensuring the shielding effect of the first blocking portion 31 on the second blocking portion 32 and the notch 5; on the other hand, it allows the gap 4 between the first blocking portion 31 and the second blocking portion 32 to form a structure that is small at the top and large at the bottom, thereby reducing the amount of luminescent material entering the gap 4 and ensuring the partition effect of the notch 5.

[0122] L≧1 / 3H, which makes the inclination angle of the side wall of the first shielding part larger, and the area difference between the first surface 313 and the second surface 321 is larger, which makes the first surface 313 larger and can completely cover the edge of the second surface 321, and makes the third surface smaller, so that the sum of the lateral widths of the notch 5 and the gap 4 is larger, thereby improving the partition effect.

[0123] When L<1 / 3H, the inclination angle of the side wall of the first shielding portion is too small, and the area difference between the first surface 313 and the third surface is small. When the areas of the first surface 313 and the second surface 321 are both large, the sum of the lateral widths of the notch 5 and the gap 4 is small, which is not conducive to the etching process; when the areas of the first surface 313 and the second surface 321 are both small, the first shielding portion cannot effectively shield the second shielding portion, so that the partition effect of the notch 5 is poor.

[0124] In some embodiments, when the first shielding portion is an inverted trapezoidal structure, the angle between the organic evaporation source angle plate and the vertical direction can be controlled to be between 30° and 75°. The smaller the angle, the less material evaporated into the cavity, and the better the isolation effect. The cathode layer (metal source) angle plate can be appropriately increased. The larger the angle, the more material can enter the cavity, and the resistance of the OLED will decrease, which is conducive to reducing the operating voltage and power consumption.

[0125] In some embodiments, in the preparation Fig.10 When the blocking structure is shown, there are two ways:

[0126] The first method is to first coat a layer of negative photoresist, and then prepare three small second blocking portions 32 (such as Fig.13 Then, a layer of negative adhesive is coated on the middle second blocking portion 32 to form another structural layer on the middle second blocking portion 32, and finally the first blocking portion 31 (as shown in FIG. Fig.14 shown).

[0127] The second method is to first coat a layer of negative photoresist, and then prepare two small second blocking portions 32 (such as Fig.15As shown), a thicker negative adhesive is coated between the two second blocking portions 32 to form a large first blocking portion 31 (as shown in FIG. Fig.16 shown).

[0128] The present application also provides a display device, comprising the display substrate described in any of the above embodiments.

[0129] The display device can be a product with an image display function, for example, it can be: a monitor, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable camcorder, a viewfinder, a navigator, a vehicle, a large-area wall, a home appliance, an information query device (such as business query equipment and monitors of e-government, banks, hospitals, power and other departments).

[0130] The display device has the technical effects described in any of the above embodiments, which will not be elaborated here.

[0131] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0132] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0133] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A display substrate, characterized in that: include: Driver substrate; A pixel defining layer is disposed on the driving substrate, wherein a plurality of pixel openings are arranged in an array on the pixel defining layer, and a first electrode layer is disposed in each of the pixel openings; A blocking structure, comprising a first blocking portion and a second blocking portion, wherein the first blocking portion is located between two adjacent pixel openings, the second blocking portion is located at the periphery of the first blocking portion and a gap is formed between the second blocking portion and the first blocking portion, a notch is formed between the second blocking portion and the drive substrate or the pixel defining layer, the notch is connected to the gap, and an orthographic projection of the second blocking portion on the drive substrate completely covers an orthographic projection of the notch on the drive substrate; The light-emitting layer covers the pixel defining layer, the first electrode layer and the blocking structure and is separated by the gap.

2. The display substrate according to claim 1, characterized in that: The side of the driving substrate close to the pixel defining layer includes a plurality of partition grooves, the first blocking portion is located in the partition groove, the second blocking portion is located between the driving substrate and the pixel defining layer, and the orthographic projection of the second blocking portion on the driving substrate covers the orthographic projection of the edge of the partition groove on the driving substrate so as to form the gap between the second blocking portion and the bottom wall of the partition groove.

3. The display substrate according to claim 2, characterized in that: The first blocking portion includes a first surface disposed away from the driving substrate, and an orthographic projection of the first surface on the driving substrate covers an orthographic projection of an edge of the second blocking portion on the driving substrate.

4. The display substrate according to claim 2, characterized in that: The first blocking portion includes a first surface arranged away from the driving substrate, the orthographic projection of the first surface on the driving substrate has no overlap with the orthographic projection of the second blocking portion on the driving substrate, the depth of the partition groove is greater than the thickness of the light-emitting layer, wherein the depth direction and the thickness direction are both perpendicular to the direction of the driving substrate.

5. The display substrate according to any one of claims 3 to 4, characterized in that: The second blocking portion includes a second surface disposed away from the driving substrate, a height difference exists between the second surface and the first surface, and the first surface is located at a side of the second surface away from the driving substrate.

6. The display substrate according to claim 5, characterized in that: The height difference is greater than or equal to 0.5 times the sum of the thickness of the second blocking portion and the depth of the partition groove, wherein both the depth direction and the thickness direction are perpendicular to the drive substrate.

7. The display substrate according to claim 1, characterized in that: The first blocking portion and the second blocking portion are both located on the pixel defining layer and between two adjacent pixel openings, and the side wall of the second blocking portion is inclined to form the gap between the side wall and the pixel defining layer.

8. The display substrate according to claim 7, characterized in that: The first blocking portion includes a first surface disposed away from the driving substrate, the second blocking portion includes a second surface disposed away from the driving substrate, and an orthographic projection of the first surface on the driving substrate covers an orthographic projection of an edge of the second surface on the driving substrate.

9. The display substrate according to claim 7, characterized in that: The first blocking portion includes a first surface disposed away from the driving substrate, the second blocking portion includes a second surface disposed away from the driving substrate, the orthographic projection of the first surface on the driving substrate and the orthographic projection of the second surface on the driving substrate have no overlap, the height of the notch is greater than the thickness of the light-emitting layer, and the height direction and the thickness direction are perpendicular to the direction of the driving substrate.

10. The display substrate according to any one of claims 8 to 9, characterized in that: There is a height difference between the second surface and the first surface, and the first surface is located on a side of the second surface away from the driving substrate.

11. The display substrate according to claim 10, characterized in that: The height difference is greater than or equal to 0.5 times the thickness of the second blocking portion, wherein the thickness direction is a direction perpendicular to the drive substrate.

12. The display substrate according to any one of claims 3 or 8, characterized in that: The first blocking portion also includes a third surface arranged opposite to the first surface, the orthographic projection of the third surface on the driving substrate is located within the orthographic projection of the first surface on the driving substrate, the distance between the edge of the orthographic projection of the first surface on the driving substrate and the edge of the orthographic projection of the third surface on the driving substrate is L, the thickness of the first blocking portion is H, L≧1 / 3H, wherein the thickness direction is a direction perpendicular to the driving substrate.

13. A display device, characterized in that: The display substrate comprises the display substrate according to any one of claims 1 to 12.

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