Display substrate and display device

Abstract

The present disclosure discloses a display substrate and a display device, which relate to the field of display technology and are used to improve the phenomenon of poor display on the display substrate and the display device. The display substrate has a display area. The display substrate includes: a substrate, a pixel circuit layer, and a charge blocking portion. The pixel circuit layer and the charge blocking portion are located on the same side of the substrate. The charge blocking portion is located in the display area and contacts the substrate. The display substrate and display device provided by the present disclosure are used for image display.

Description

Technical Field

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

[0002] OLED (Organic Light Emitting Diode) displays are made using organic light-emitting diodes (OLEDs). They are currently widely used due to their excellent properties, including the lack of a backlight, high contrast, thinness, wide viewing angle, fast response time, compatibility with flexible panels, wide operating temperature range, and relatively simple structure and manufacturing process. Summary of the Invention

[0003] An object of the embodiments of the present disclosure is to provide a display substrate and a display device, which are used to improve the phenomenon of poor display in the display device.

[0004] To achieve the above objectives, the present disclosure provides the following technical solutions:

[0005] In one aspect, a display substrate is provided. The display substrate has a display area. The display substrate includes a substrate, a pixel circuit layer, and a charge blocking portion. The pixel circuit layer and the charge blocking portion are located on the same side of the substrate. The charge blocking portion is located in the display area and contacts the substrate.

[0006] Some embodiments of the present disclosure provide display substrates that, by providing a charge blocking portion in the display area, disposing the pixel circuit layer and the charge blocking portion on the same side of the substrate, and placing the charge blocking portion in contact with the substrate, can utilize the charge blocking portion to absorb or direct charge generated or accumulated in the substrate in contact with the charge blocking portion. This can reduce the impact of charge accumulated in the substrate on the pixel circuit layer, avoid abnormalities in the drive signals generated by the pixel drive circuit in the pixel circuit layer, and thereby improve display defects on the display substrate.

[0007] In some embodiments, the charge blocking portion is located between the substrate and the pixel circuit layer, and the charge blocking portion is in contact with a surface of the substrate on a side close to the pixel circuit layer.

[0008] In some embodiments, the charge blocking portion has a planar structure or a network structure.

[0009] In some embodiments, the charge blocking portion has a planar structure, and the material of the charge blocking portion includes amorphous silicon. Alternatively, the charge blocking portion has a mesh structure, and the material of the charge blocking portion includes amorphous silicon or a metal material.

[0010] In some embodiments, the display substrate further includes a first constant voltage signal line located in the pixel circuit layer, and the charge blocking portion is coupled to the first constant voltage signal line.

[0011] In some embodiments, the display substrate further comprises a non-display area located at least on one side of the display area, and at least one electrostatic discharge unit located in the non-display area, the electrostatic discharge unit being coupled to the charge blocking portion.

[0012] In some embodiments, the display substrate further includes a first transfer layer located in the non-display area, the charge blocking portion is coupled to the first transfer layer, and the first transfer layer is coupled to the electrostatic discharge unit.

[0013] In some embodiments, the display substrate further includes a second constant-voltage signal line located in the pixel circuit layer, wherein the pixel circuit layer includes a plurality of pixel driving circuits. The charge blocking portion includes a plurality of conductive strips extending perpendicular to the substrate and located between two adjacent pixel driving circuits. One end of each conductive strip passes through at least a portion of the pixel circuit layer and contacts the substrate, and the other end of each conductive strip is coupled to the second constant-voltage signal line; alternatively, the conductive strip is grounded.

[0014] In some embodiments, the charge blocking portion and the second constant-voltage signal line are made of the same layer and material.

[0015] In some embodiments, the display substrate further includes a second transfer layer. The second transfer layer is located between the charge blocking portion and the second constant-voltage signal line. The other end of the charge blocking portion is coupled to the second transfer layer, and the second transfer layer is coupled to the second constant-voltage signal line.

[0016] In some embodiments, the charge blocking portion is made of a metal material or a transparent conductive material.

[0017] In some embodiments, the substrate comprises transparent polyimide.

[0018] In some embodiments, the display substrate further comprises: a light-emitting device layer, a touch layer, and a color filter layer. The light-emitting device layer is disposed on a side of the pixel circuit layer away from the substrate. The touch layer is disposed on a side of the light-emitting device layer away from the substrate. The color filter layer is disposed on a side of the touch layer away from the substrate.

[0019] On the other hand, a display device is provided, comprising: a display substrate as described in any one of the above examples.

[0020] The flexible circuit board included in the display module provided in some embodiments of the present disclosure has the same structure and beneficial effects as the flexible circuit boards provided in some of the above embodiments, which will not be described in detail here.

[0021] In some embodiments, the display device further includes: an optical element disposed on the non-light-emitting side of the display substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below should be considered schematic diagrams and are not intended to limit the actual dimensions, etc., of the products involved in the embodiments of the present disclosure.

[0023] Figure 1 is a schematic diagram of a display device according to some embodiments of the present disclosure;

[0024] Figure 2 for Figure 1 A structural diagram of the display device;

[0025] Figure 3 is a schematic diagram of a display substrate according to some embodiments of the present disclosure;

[0026] Figure 4 is a structural diagram of a display substrate according to some embodiments of the present disclosure;

[0027] Figure 5 is a structural diagram of another display substrate according to some embodiments of the present disclosure;

[0028] Figure 6 is a structural diagram of another display substrate according to some embodiments of the present disclosure;

[0029] Figure 7 is a structural diagram of another display substrate according to some embodiments of the present disclosure;

[0030] Figure 8 is a structural diagram of another display substrate according to some embodiments of the present disclosure;

[0031] Figure 9 is a schematic diagram of a charge blocking portion according to some embodiments of the present disclosure;

[0032] Figure 10 A schematic diagram showing frame-shaped bright stripes appearing on a display substrate in the related art;

[0033] Figure 11Schematic diagram of atomic distribution in amorphous silicon material;

[0034] Figure 12a is a distribution diagram of movable charges in a substrate in the related art;

[0035] Figure 12b is a distribution diagram of movable charges in a substrate in some embodiments of the present disclosure;

[0036] Figure 13 is a structural diagram of a charge blocking portion and an electrostatic release unit according to some embodiments of the present disclosure;

[0037] Figure 14 for Figure 13 A cross-sectional view along the BB' direction;

[0038] Figure 15 is a structural diagram of another display substrate according to some embodiments of the present disclosure;

[0039] Figure 16 is a structural diagram of another display substrate according to some embodiments of the present disclosure;

[0040] Figure 17 FIG. 4 is a structural diagram of another display substrate according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0042] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as having an open, inclusive meaning, that is, "including, but not limited to." In the description of the specification, the terms "one embodiment," "some embodiments," "exemplary embodiments," "examples," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0043] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0044] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0045] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0046] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0047] Some embodiments of the present disclosure provide a display device 1000. For example, Figure 1 A display device 1000 is illustrated.

[0048] For some examples, see Figure 1 The display device 1000 includes a display substrate 100. The display substrate 100 is used to display images.

[0049] In some examples, the display device 1000 further includes a housing, a display driver IC, and other structures.

[0050] There are many types of display devices, which can be selected and set according to actual needs.

[0051] In some examples, the display device 1000 is a transparent display device, and accordingly, the display substrate 100 has a relatively high light transmittance as a whole. In this case, the display device 1000 can achieve transparent display.

[0052] In other examples, the display device 1000 is a non-transparent display device. The display device 1000 can be any device that displays either moving (e.g., video) or fixed (e.g., still images), and whether text or images. More specifically, it is contemplated that the embodiments described herein can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal digital assistants (PDAs), handheld or portable computers, global positioning system (GPS) receivers / navigators, cameras, moving picture experts group 4 (MP4) video players, video cameras, game consoles, watches, clocks, calculators, television monitors, computer monitors, automotive displays (e.g., odometer displays), navigation systems, cockpit controls and / or displays, camera view displays (e.g., displays for rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays for images of a piece of jewelry), and the like.

[0053] In some embodiments, see Figure 1 The display device 1000 may further include other structures, such as an optical element 200 .

[0054] For example, the side of the display substrate 100 that can display an image is the light-emitting side of the display substrate 100. The other side opposite to the light-emitting side is the non-light-emitting side of the display substrate 100. Figure 2 The optical element 200 is, for example, disposed on the non-light-emitting side of the display substrate 100 .

[0055] It can be understood that the portion of the display substrate 100 opposite to the optical element 200 has a higher light transmittance, so that light can pass through the portion of the display substrate 100 opposite to the optical element 200, enter the optical element 200, and be collected by the optical element 200, thereby enabling the optical element 200 to work.

[0056] The optical element 200 may include, for example, a camera or a fingerprint recognition module.

[0057] Take the optical element 200 as an example, which is a camera.

[0058] When the camera is working, external light can pass through the portion of the display substrate 100 opposite the optical element 200 and enter the camera located on the non-light-emitting side of the display substrate 100, where it is collected by the camera, allowing the camera to take a picture. When the camera is not working, the entire display substrate 100 can display the image. In other words, the display device 1000 provided by the present disclosure can realize both the photo-taking function and the full-screen display function.

[0059] Some embodiments of the present disclosure provide a display substrate 100, see Figure 3 , having a display area A1 and a non-display area A2 located on at least one side of the display area A1.

[0060] For example, the non-display area A2 may be located on one side, two sides, or three sides of the display area A1, or, see Figure 3 , the non-display area A2 can also surround the display area A1.

[0061] Exemplarily, the display area A refers to an area of ​​the display substrate 100 that can be used to display images.

[0062] For some examples, see Figures 4 to 6 , the display substrate 100 includes: a substrate 1 .

[0063] Exemplarily, the substrate 1 has a certain strength, so that the substrate 1 can provide support for other functional layers (such as the pixel circuit layer 2 ) in the display substrate 100 .

[0064] For example, see Figures 4 to 6 The structure of the substrate 1 can be a single-layer structure, which can simplify the manufacturing process of the display substrate 100 and reduce the manufacturing cost of the display substrate 100. Alternatively, the structure of the substrate 1 can also be a double-layer structure, which can make the substrate 1 have better strength and help provide better support for other functional layers in the display substrate 100 (such as the pixel circuit layer 2).

[0065] The thickness of the substrate 1 can be set according to actual conditions, as long as it can support other functional layers in the display substrate 100 .

[0066] When the substrate 1 has a single-layer structure, the thickness of the substrate 1 may be, for example, 10 μm. This allows the display substrate 100 to achieve a transparent display function while ensuring support for the display substrate 100 .

[0067] Exemplarily, the material of substrate 1 can be a transparent material or a non-transparent material. When the material of substrate 1 is a transparent material, the light blocking effect of substrate 1 can be reduced, which is conducive to enabling the display substrate 100 to realize a transparent display function or a full-screen display function.

[0068] For some examples, see Figures 4 to 6 The display substrate 100 further includes: a pixel circuit layer 2 .

[0069] Exemplarily, the pixel circuit layer 2 is disposed on one side of the substrate 1. The circuit structure layer 2 may include a plurality of pixel driving circuits 21.

[0070] The pixel driving circuit 21 can have various structures, which are not limited in this disclosure. For example, the pixel driving circuit 21 can have a structure such as "6T1C," "7T1C," "6T2C," or "7T2C," wherein "T" represents a transistor, the number preceding "T" represents the number of transistors, and "C" represents a storage capacitor, and the number preceding "C" represents the number of storage capacitors. In the drawings of some embodiments of the present disclosure, a single transistor is used to represent the pixel driving circuit 21 for illustration.

[0071] Exemplarily, the circuit structure layer 2 may further include a plurality of signal lines, such as data lines, gate lines, and the like. Each pixel driving circuit 21 is electrically connected to the plurality of signal lines to operate under the action of the signals transmitted by the plurality of signal lines and generate a driving signal. The signals transmitted by the plurality of signal lines include clock signals, high voltage signals, and low voltage signals.

[0072] In some examples, the display substrate 100 further includes a light emitting device layer 3 . The light emitting device layer 3 includes a pixel defining layer 31 and a plurality of light emitting devices 32 .

[0073] Exemplarily, the pixel defining layer 31 is disposed on a side of the pixel circuit layer 2 away from the substrate 1 .

[0074] For example, the top view structure of the pixel defining layer 31 is grid-like and has a plurality of openings, and each light emitting device 32 is located in at least one of the openings.

[0075] For example, see Figure 7 The light emitting device 32 includes an anode 321, a light emitting layer 322 and a cathode 323 which are stacked in sequence.

[0076] For example, the cathode 323 can be provided in an entire layer. It is understandable that the cathodes 323 of the plurality of light emitting devices 32 are electrically connected to each other to form an integrated structure, thereby forming a common cathode.

[0077] Exemplarily, each light-emitting device 32 can be electrically connected to the pixel driving circuit 21 via its anode 321. The pixel driving circuit 21 can transmit a driving signal to the anode 321 of the corresponding light-emitting device 32. The cathode 323 can receive a common voltage signal. When the pixel driving circuit 21 transmits the driving signal to the anode 321 and the common voltage signal to the cathode 323, the light-emitting layer 322 can emit light under the excitation of the driving signal and the common voltage signal, thereby realizing the light-emitting function of the light-emitting device 32. The multiple light-emitting devices 32 in the light-emitting device layer 3 cooperate with each other to enable the display substrate 100 to display a picture.

[0078] In the related art, during the manufacturing process of the display substrate and the operation of the pixel driving circuit in the display substrate, the free charges (or movable charges) in the display substrate are transferred to the substrate and accumulated in the substrate. The accumulated charges in the substrate will affect the normal operation of the pixel driving circuit in the pixel circuit layer, causing the driving signal generated by the pixel driving circuit to be abnormal, and further causing the corresponding light-emitting device to emit abnormal light. For example, see Figure 10 , display defects such as frame-shaped bright stripes appear on the display substrate.

[0079] Based on this, in some examples, the display substrate 100 further includes a charge blocking portion 4. The pixel circuit layer 2 and the charge blocking portion 4 are located on the same side of the substrate 1. The charge blocking portion 4 is located in the display area and contacts the substrate 1.

[0080] In this disclosure, it should be noted that "charge blocking portion 4 is located in the display area" means that the area occupied by charge blocking portion 4 overlaps with the display area; or, alternatively, that the area occupied by charge blocking portion 4 is smaller than the area of ​​display area A1. Charge blocking portion 4 being in contact with substrate 1 means that charge blocking portion 4 is in direct contact with the surface of substrate 1 on the side closest to pixel circuit layer 2.

[0081] For example, the charge blocking portion 4 can absorb or conduct charges. Figures 4 to 8 By placing the pixel circuit layer 2 and the charge blocking portion 4 on the same side of the substrate 1, and placing the charge blocking portion 4 in contact with the substrate 1, when the substrate 1 generates or accumulates charge, the charge blocking portion 4 can absorb or direct the charge from the substrate 1 in contact with it, making it difficult for the substrate 1 to accumulate charge. Compared to related technologies, this arrangement can reduce the adverse effects of accumulated charge in the substrate 1 on the pixel driving circuit 21 in the pixel circuit layer 2, thereby improving display defects caused by the display substrate 100.

[0082] Thus, the display substrate 100 provided by some embodiments of the present disclosure, by providing a charge blocking portion 4 in the display area A1, disposing the pixel circuit layer 2 and the charge blocking portion 4 on the same side of the substrate 1, and placing the charge blocking portion 4 in contact with the substrate 1, can utilize the charge blocking portion 4 to absorb or conduct charges generated or accumulated in the substrate 1 in contact with it. This can reduce the impact of the charge accumulated in the substrate 1 on the pixel circuit layer 2, avoid abnormalities in the drive signal generated by the pixel drive circuit 21 in the pixel circuit layer 2, and thus improve the display defects of the display substrate 100.

[0083] It is understandable that the charge blocking portion 4 can be arranged in a variety of ways, and the present disclosure does not limit this.

[0084] In some embodiments, see Figure 4 and Figure 5 The charge blocking portion 4 is located between the substrate 1 and the pixel circuit layer 2. The charge blocking portion 4 is in contact with a surface of the substrate 1 on a side close to the pixel circuit layer 2.

[0085] For example, by arranging the charge blocking portion 4 between the substrate 1 and the pixel circuit layer 2, and making the charge blocking portion 4 contact the surface of the substrate 1 on the side close to the pixel circuit layer 2, the path for the movable charges in the display substrate 100 to migrate to the substrate 1 can be blocked, and the charges on the surface of the substrate 1 on the side close to the pixel circuit layer 2 can be more easily absorbed or discharged by the charge blocking portion 4, thereby further reducing the amount of charge accumulated in the substrate 1, further reducing the influence of the charge accumulated in the substrate 1 on the pixel circuit layer 2, and further improving the display defects of the display substrate 100.

[0086] Moreover, the solution disclosed in the present invention provides a charge blocking portion 4 on the surface of one side of the substrate 1 close to the pixel circuit layer 2 to improve the display defects of the display substrate 100, without changing the structure of other film layers. Furthermore, in the process of manufacturing the display substrate 100 disclosed in the present invention, there is no need to additionally change the mask plate and process of other film layers. Therefore, the solution disclosed in the present invention has little impact on the existing product design and the process is simple to implement.

[0087] In some embodiments, the charge blocking portion 4 has a planar structure or a mesh structure.

[0088] In some examples, the charge blocking portion 4 may be a planar structure, that is, the charge blocking portion 4 is disposed in a whole layer along the plane where the display substrate 100 is located. Figure 4, which increases the contact area between the charge blocking part 4 and the substrate 1, and increases the blocking area and blocking effect of the charge blocking part on the substrate and the pixel circuit layer. The charge blocking part 4 can more easily absorb or extract the charge in the substrate 1, making it difficult for the substrate 1 to accumulate charge, thereby reducing the impact of the charge accumulated in the substrate 1 on the pixel circuit layer 2, and improving the display defects of the display substrate 100.

[0089] In other examples, combined Figure 5 and Figure 9 , the charge blocking portion 4 has a mesh structure. The charge blocking portion 4 includes a plurality of first blocking bars extending along a first direction, and a plurality of second blocking bars extending along a second direction. The first direction and the second direction intersect with each other, and the plurality of first blocking bars and the plurality of second blocking bars are arranged crosswise with each other. In this case, the amount of material used to form the charge blocking portion 4 can be reduced, saving the manufacturing cost of the charge blocking portion 4. Moreover, because the charge blocking portion 4 has a mesh structure, the charge blocking portion 4 has a weaker blocking effect on the light passing through the display substrate 100, which can avoid affecting the transmittance of the display substrate 100 to light, and is beneficial for the display substrate 100 to realize a transparent display function or to realize a photo-taking function under full-screen display.

[0090] It should be noted that when the structure of the charge barrier portion 4 is different, the material of the charge barrier portion 4 is also different.

[0091] In some examples, the material of the planar charge blocking portion 4 includes amorphous silicon (a-Si).

[0092] It should be noted that the arrangement of atoms in crystalline silicon follows the regular tetrahedron distribution law, while the distribution of atoms in amorphous silicon does not completely follow the regular tetrahedron law. That is, the distribution of atoms in amorphous silicon is basically in the form of a regular tetrahedron, but it has been deformed, resulting in many defects. Figure 11 In addition to a small number of complete silicon-hydrogen bonds, most of the amorphous silicon is composed of dangling bonds (DB). These dangling bonds can be used to induce, attract, and capture movable charges. That is, in amorphous silicon, most silicon atoms form covalent bonds with the four nearest silicon atoms. However, a portion of silicon atoms do not necessarily form covalent bonds with the four nearest silicon atoms. Instead, one bond is left unpaired to form a dangling bond, which can capture or release movable charges. Moreover, after amorphous silicon captures or releases movable charges, the movable charges captured or released by amorphous silicon have little effect on the amorphous silicon itself, that is, after amorphous silicon captures or releases movable charges, the amorphous silicon itself can avoid being charged and accumulating.

[0093] Therefore, in the case where the material of the charge blocking portion 4 includes amorphous silicon, the charge blocking portion 4 can block the migration path of the movable charges and absorb the movable charges, thereby effectively reducing the amount of movable charges in the substrate 1 .

[0094] For example, see Figures 4 to 6 , the pixel driving circuit 21 includes an active layer 211. Figure 12a During operation, the pixel driver circuit in the pixel circuit layer switches between high and low voltages, generating an electric field between the active layer 211' of the pixel driver circuit and the substrate 1'. This causes mobile charges in the display substrate to be transferred to the substrate 1' and gradually accumulate there, affecting the normal operation of the pixel driver circuit and ultimately causing display defects such as frame-shaped bright streaks on the display substrate.

[0095] In the present disclosure, the charge blocking portion 4 in the planar structure can block the path of the mobile charges in the display substrate 100 from migrating to the substrate 1 and absorb the mobile charges in the substrate 1. Figures 4 to 6 In the process of the pixel driving circuit 21 in the pixel circuit layer 2 working, even if there is a high-low voltage switching in the pixel driving circuit 21, combined with Figure 12b The charge blocking portion 4 can also block and absorb the movable charges generated in the process, making it difficult for the substrate 1 to accumulate charges, reducing the impact of the charges accumulated in the substrate 1 on the pixel driving circuit 21 in the pixel circuit layer 2, and improving the poor display of the display substrate 100.

[0096] Furthermore, amorphous silicon has a certain conductivity and can absorb movable charges. Therefore, when the pixel circuit layer 2 is not loaded with a signal, the charge blocking portion 4 with a planar structure can also evenly distribute and release the movable charges in the substrate 1.

[0097] It should be noted that when the material of the charge blocking part 4 with a planar structure includes amorphous silicon, it is also possible to avoid the generation of parasitic capacitance between the amorphous silicon and the conductive material in the pixel circuit layer 2, thereby avoiding the influence of the charge blocking part 4 on the pixel driving circuit 21 in the pixel circuit layer 2, and avoiding affecting the normal working state of the pixel driving circuit 21.

[0098] For other examples, see Figure 5 The material of the charge blocking portion 4 with a mesh structure includes amorphous silicon or metal material.

[0099] As described above, when the material of the charge blocking portion 4 with a mesh structure includes amorphous silicon, the charge blocking portion 4 can block the path of the movable charges in the display substrate 100 to migrate to the substrate 1, and absorb the movable charges in the substrate 1, making it difficult for the substrate 1 to accumulate charges, reducing the impact of the charges accumulated in the substrate 1 on the pixel circuit layer 2, and improving the poor display situation of the display substrate 100.

[0100] Similarly, when the material of the charge blocking portion 4 having a mesh structure includes a metal material, the charge blocking portion 4 has good conductivity, and because the charge blocking portion 4 is in contact with the substrate 1, the charge blocking portion 4 can extract the movable charges accumulated in the substrate 1, making it difficult for the charges in the substrate 1 to accumulate, thereby reducing the impact of the charges accumulated in the substrate 1 on the pixel circuit layer 2, thereby improving the display defects of the display substrate 100.

[0101] Moreover, metal materials have good conductivity. Therefore, when the pixel circuit layer 2 is not loaded with a signal, the charge blocking portion 4 having a mesh structure including amorphous silicon or metal materials can also evenly distribute and release the movable charges in the substrate 1.

[0102] Furthermore, the charge blocking portion 4 composed of metal materials is arranged in a mesh shape, which can also reduce the risk of parasitic capacitance formed between the above-mentioned metal material and the conductive material in the pixel circuit layer 2, avoid the influence of the charge blocking portion 4 on the pixel driving circuit 21 in the pixel circuit layer 2, and avoid affecting the normal working state of the pixel driving circuit 21.

[0103] In some embodiments, see Figure 7 The display substrate 100 further includes a first constant voltage signal line 5 located in the pixel circuit layer 2 . The charge blocking portion 4 is coupled to the first constant voltage signal line 5 .

[0104] In some examples, combined Figure 3 and Figure 7 The first constant-voltage signal line 5 can be located in the display area A1, or a portion of the first constant-voltage signal line can be located in the display area A1 and the other portion can be located in the non-display area A2. The first constant-voltage signal line 5 is used to provide a first constant voltage. By coupling the charge blocking portion 4 to the first constant-voltage signal line 5, the charge blocking portion 4 can maintain a constant voltage, and the charge in the charge blocking portion 4 can be directed to the first constant-voltage signal line 5. In this way, the charge blocking portion 4 can maintain its absorption or conduction function on the substrate 1 for a long time, reducing the accumulation of charge in the substrate 1. This also reduces the impact of the charge accumulated in the substrate 1 on the pixel circuit layer 2, thereby improving the display defects of the display substrate 100.

[0105] Exemplarily, the plurality of signal lines in the pixel circuit layer 2 include a first voltage signal line, a portion of which is located in the display area A1 and is electrically connected to the pixel driving circuit 21 to provide the pixel driving circuit 21 with a first voltage signal having a constant voltage; another portion of the first voltage signal line is located in the non-display area A2 and is used to receive the first voltage signal from outside the display substrate 100 and transmit the first voltage signal to the pixel driving circuit 21. The first constant voltage signal line 5 may, for example, include the above-mentioned first voltage signal line. By coupling the charge blocking portion 4 to the first constant voltage signal line 5 (here, for example, the first power line), the charge in the charge blocking portion 4 can be directed to the first constant voltage signal line 5, thereby reducing the accumulation of charge in the substrate 1 and improving the display defects of the display substrate 100.

[0106] Exemplarily, the plurality of signal lines in the pixel circuit layer 2 include a common voltage signal line, a portion of which may be located in the display area A1 and electrically connected to the cathode 323 of the light-emitting device 32 to provide a common voltage signal having a constant voltage to the cathode 323 of the light-emitting device; another portion of the common voltage signal line may be located in the non-display area A2 and receive the common voltage signal from outside the display substrate 100 and transmit the common voltage signal to the cathode of the light-emitting device 32. The first constant voltage signal line 5 may, for example, include the common connection line described above. By coupling the charge blocking portion 4 to the first constant voltage signal line 5 (here, for example, the common connection line), the charge in the charge blocking portion 4 may be directed to the first constant voltage signal line 5, thereby reducing the accumulation of charge in the substrate 1 and improving the display defects of the display substrate 100.

[0107] For example, see Figure 7 The first constant-voltage signal line 5 can be located in the pixel circuit layer 2. Before forming the first constant-voltage signal line 5, a via hole penetrating a portion of the pixel circuit layer 2 is first formed in the display substrate 100 to expose a portion of the surface of the charge blocking portion 4. Thereafter, in the process of manufacturing the first constant-voltage signal line 5, part of the material of the first constant-voltage signal line 5 can be formed in the above-mentioned via hole, thereby realizing the coupling between the charge blocking portion 4 and the first constant-voltage signal line 5.

[0108] It is understandable that the first constant voltage signal line 5 may also be a signal line other than the first voltage signal line and the common voltage signal line described above, and the first constant voltage signal line 5 may also be located in other film layers of the display substrate 100. The voltage type and magnitude of the first constant voltage signal line 5 may be set according to actual conditions, and the first constant voltage signal line 5 and the charge blocking portion 4 may remain coupled to each other.

[0109] In some embodiments, see Figure 13 and Figure 14The display substrate 100 further includes at least one electrostatic discharge unit 6 located in the non-display area, and the electrostatic discharge unit 6 is coupled to the charge blocking portion 4 .

[0110] Exemplarily, the electrostatic discharge unit 6 is used to discharge static electricity. The material of the electrostatic discharge unit 6 includes a conductive material, such as metal.

[0111] For example, the number of electrostatic discharge units 6 can be one, two, three, etc. Figure 13 Three electrostatic discharge units 6 are shown in FIG.

[0112] For example, the electrostatic discharge unit 6 located in the non-display area may be provided in the same layer as the charge blocking portion 4 , or may be provided in a different layer from the charge blocking portion 4 .

[0113] For example, when the charge blocking portion 4 is made of metal, the electrostatic discharge unit 6 and the charge blocking portion 4 can be provided on the same layer, which can simplify the manufacturing process of the display substrate 100 .

[0114] In the embodiments of the present disclosure, "same layer" refers to a layer structure formed by using the same film-forming process to form a specific pattern, and then using the same mask through a single patterning process. Depending on the specific pattern, a single patterning process may include multiple exposure, development, or etching processes, and the specific pattern in the resulting layer structure may be continuous or discontinuous, and these specific patterns may also be at different heights or have different thicknesses.

[0115] For example, when the display substrate 100 includes multiple electrostatic discharge units 6 , each electrostatic discharge unit 6 may be coupled to the charge blocking portion 4 ; or a portion (eg, one) of the multiple electrostatic discharge units 6 may be coupled to the charge blocking portion 4 .

[0116] For example, by coupling the electrostatic discharge unit 6 with the charge blocking portion 4, after the charge in the substrate 1 is conducted to the charge blocking portion 4, the charge blocking portion 4 can conduct the charge to the electrostatic discharge unit 6 for release. Therefore, by this arrangement, the charge accumulated in the substrate 1 can be reduced, and the impact of the charge accumulated in the substrate 1 on the pixel circuit layer 2 can be reduced, thereby improving the display defects of the display substrate 100.

[0117] For some examples, see Figure 14 The electrostatic discharge unit 6 and the charge blocking portion 4 are arranged on different layers, and the display substrate 100 further includes a first transfer layer 7 located in the non-display area. The charge blocking portion 4 is coupled to the first transfer layer 7, and the first transfer layer 7 is coupled to the electrostatic discharge unit 6.

[0118] For example, see Figure 14Between the electrostatic discharge unit 6 and the charge blocking portion 4, the display substrate 100 further includes a first insulating layer 8 and a second insulating layer 9. The first transfer layer 7 is located on the second insulating layer 9. The material of the first transfer layer 7 is a conductive material, such as metal.

[0119] For example, see Figure 14 The first insulating layer 8 is provided with a via 81, which passes through a portion of the first insulating layer 8 and exposes a portion of the surface of the first transfer layer 7. The material of the electrostatic discharge unit 6 can be filled in the via 81, thereby coupling the electrostatic discharge unit 6 to the first transfer layer 7. The second insulating layer 9 is provided with a via 91, which passes through a portion of the second insulating layer 9 and exposes a portion of the surface of the charge blocking portion 4. The material of the first transfer layer 7 can be filled in the via 91, thereby coupling the first transfer layer 7 to the charge blocking portion 4.

[0120] It can be understood that when there are more than two film layers between the electrostatic release unit 6 and the charge blocking part 4, the via 81 and / or the via 91 can pass through multiple film layers, so the materials of the electrostatic release unit 6 and the first transfer layer 7 can pass through multiple film layers, thereby coupling the charge blocking part 4 to the first transfer layer 7, and the first transfer layer 7 to the electrostatic release unit 6.

[0121] Because the first transfer layer 7 is made of a conductive material, and the charge blocking portion 4 is coupled to the first transfer layer 7, which is in turn coupled to the electrostatic discharge unit 6, after the charge blocking portion 4 absorbs the charge in the substrate 1, the charge can be conducted through the first transfer layer 7 to the electrostatic discharge unit 6 for release. This arrangement can reduce the charge accumulated in the substrate 1 and the impact of the charge accumulated in the substrate 1 on the pixel circuit layer 2, thereby improving the display defects of the display substrate 100.

[0122] For some examples, see Figure 4 and Figure 5 , the orthographic projection of the active layer 211 on the substrate 1 is within the range of the orthographic projection of the charge blocking portion 4 on the substrate 1 .

[0123] It should be noted that the electrical characteristics of the active layer 211 are greatly affected by the lighting environment. Therefore, when light is emitted from one side of the substrate 1 toward the active layer 211 , the light will affect the electrical characteristics of the pixel driving circuit 21 .

[0124] When the material of the charge blocking part 4 is amorphous silicon or metal material, the charge blocking part 4 has a certain blocking effect on light. By setting the positive projection of the active layer 211 on the substrate 1 within the positive projection range of the charge blocking part 4 on the substrate 1, the charge blocking part 4 can block the light emitted from one side of the substrate 1 to the active layer 211 to a certain extent, thereby reducing the influence of the light emitted from one side of the substrate 1 to the active layer 211 on the basic electrical characteristics of the pixel driving circuit 21.

[0125] In some embodiments, see Figure 6 and Figure 8 The display substrate 100 further includes a second constant-voltage signal line 10 located in the pixel circuit layer 2. The charge blocking portion 4 includes a plurality of conductive strips 41 extending perpendicularly to the substrate 1 and located between two adjacent pixel driving circuits 21. One end of the conductive strip 41 passes through at least a portion of the pixel circuit layer 2 to contact the substrate 1, and the other end of the conductive strip 41 is coupled to the second constant-voltage signal line 10; alternatively, the conductive strip 41 is grounded.

[0126] For example, the second constant voltage signal line 10 may be located in the display area A1, or a portion of the second constant voltage signal line is located in the display area A1 and another portion is located in the non-display area A2. The second constant voltage signal line 10 is used to provide a second constant voltage.

[0127] For example, the conductive strips 41 can transmit charges. The charge blocking portion 4 includes a plurality of conductive strips 41 , and thus, the plurality of conductive strips 41 can enhance the charge transmission capability of the charge blocking portion 4 .

[0128] By providing the conductive strip 41 between two adjacent pixel driving circuits 21 , the influence of the conductive strip 41 on the wiring of the pixel driving circuit 21 can be reduced, and the influence of the conductive strip 41 on the manufacturing process of the display substrate 100 can be reduced.

[0129] For some examples, see Figure 6 and Figure 8 By allowing one end of the conductive strip 41 to pass through at least a portion of the pixel circuit layer 2 and contact the substrate 1, and coupling the other end of the conductive strip 41 to the second constant-voltage signal line 10, the substrate 1 can be coupled to the second constant-voltage signal line 10 through the charge blocking portion 4. Therefore, through the above arrangement, the second constant voltage provided by the second constant-voltage signal line 10 can be transmitted to the substrate 1, maintaining the second constant voltage in the substrate 1. If there are movable charges in the substrate 1, the charges in the substrate 1 can be conducted to the second constant-voltage signal line 10 through the charge blocking portion 4, reducing the accumulation of charges in the substrate 1 and the impact of the accumulated charges in the substrate 1 on the pixel circuit layer 2, thereby improving the display defects of the display substrate 100.

[0130] Exemplarily, the plurality of signal lines in the pixel circuit layer 2 include a first voltage signal line, a portion of which is located in the display area A1 and is electrically connected to the pixel driving circuit 21 to provide the pixel driving circuit 21 with a first voltage signal having a constant voltage; another portion of the first voltage signal line is located in the non-display area A2 and is used to receive the first voltage signal from outside the display substrate 100 and transmit the first voltage signal to the pixel driving circuit 21. The second constant voltage signal line 10 may, for example, include the above-mentioned first voltage signal line. By coupling the charge blocking portion 4 to the second constant voltage signal line 10 (here, for example, the first power line), the charge in the charge blocking portion 4 can be directed to the second constant voltage signal line 10, thereby reducing the accumulation of charge in the substrate 1 and improving the display defects of the display substrate 100.

[0131] Exemplarily, the plurality of signal lines in the pixel circuit layer include a common voltage signal line, a portion of which may be located in the display area A1 and electrically connected to the cathode 323 of the light-emitting device 32 to provide a common voltage signal having a constant voltage to the cathode 323 of the light-emitting device; another portion of the common voltage signal line may be located in the non-display area A2 and receive the common voltage signal from outside the display substrate 100 and transmit the common voltage signal to the cathode of the light-emitting device 32. The second constant voltage signal line 10 may, for example, include the common connection line described above. By coupling the charge blocking portion 4 to the second constant voltage signal line 10 (here, for example, the common connection line), the charge in the charge blocking portion 4 may be directed to the second constant voltage signal line 10, thereby reducing the accumulation of charge in the substrate 1 and improving the display defects of the display substrate 100.

[0132] It is understood that the second constant-voltage signal line 10 may also include other signal lines in addition to the first power line and the common connection line described above, and the second constant-voltage signal line 10 may also be located in other film layers of the pixel circuit layer 2. The voltage type and magnitude of the second constant-voltage signal line 10 may be set according to actual conditions, and the end of the conductive strip 41 that is not in contact with the substrate 1 may be in contact with the second constant-voltage signal line 10.

[0133] On the other hand, the conductive strip 41 is directly coupled to the first power line or the common connection line, and does not increase the film layer structure of the display substrate 100. Therefore, in the process of manufacturing the display substrate 100, there is no need to change the manufacturing process of other film layers, and the manufacturing process of the display substrate 100 is not greatly affected.

[0134] In other examples, by grounding the conductive strip 41, the substrate 1 can be grounded through the charge blocking portion 4. Therefore, when there are movable charges in the substrate 1, the movable charges in the substrate 1 can be released by being grounded through the charge blocking portion 4, thereby reducing the accumulation of charges in the substrate 1 and the impact of the accumulated charges in the substrate 1 on the pixel circuit layer 2, thereby improving the display defects of the display substrate 100.

[0135] In some embodiments, the charge blocking portion 4 and the second constant-voltage signal line 10 are made of the same layer and material.

[0136] For example, see Figure 6 and Figure 8 The pixel circuit layer 2 includes an interlayer dielectric layer 22 close to the substrate 1. The material of the interlayer dielectric layer 22 is an insulating material. The pixel driving circuit 21 includes a source 212 and a drain 213. The second constant voltage signal line 10, the source 212 and the drain 213 are all located on the interlayer dielectric layer 22 and can be located in the same film layer (source-drain metal layer) in the pixel circuit layer 2. In the process of making the charge blocking part 4 and the second constant voltage signal line 10, see Figure 6 and Figure 8 A via hole can be provided at the location of the second constant-voltage signal line 10, extending perpendicularly to the substrate 1 and extending to the substrate 1. The via hole is used to form a conductive strip 41. The material forming the second constant-voltage signal line 10 can then be filled into the via hole, forming the conductive strip 41 and the second constant-voltage signal line 10 in a single manufacturing process. Therefore, the conductive strip 41 and the second constant-voltage signal line 10 are formed from the same layer and material. In other words, the charge blocking portion 4 and the second constant-voltage signal line 10 are formed from the same layer and material.

[0137] By providing the charge blocking portion 4 and the second constant voltage signal line 10 with the same layer and the same material, the manufacturing process of the charge blocking portion 4 can be simplified, and thus the manufacturing process of the display substrate 100 is simplified.

[0138] For example, the material of the second constant voltage signal line 10 may include a metal material, and the material of the charge blocking portion 4 may also include a metal material.

[0139] For other examples, see Figure 15The pixel circuit layer 2 includes an interlayer dielectric layer 22 on the side close to the substrate 1, and a passivation layer 23 located on the interlayer dielectric layer 22. The material of the passivation layer 23 is an insulating material. In the process of making the conductive strip 41, the interlayer dielectric layer 22, the second constant voltage signal line 10 and the passivation layer 23 are first formed in sequence. Thereafter, the passivation layer 23 is patterned to form a via 231 that exposes a portion of the surface of the second constant voltage signal line 10, and a via is formed that penetrates a portion of the pixel circuit layer 2 and extends to the substrate 1 to expose a portion of the surface of the substrate 1. Then, the conductive strip 41 is formed, and the material of the conductive strip 41 is simultaneously filled in the above-mentioned via, so that the conductive strip 41 is coupled to the second constant voltage signal line 10.

[0140] In this case, the conductive strip 41 and the second constant voltage signal line 10 are formed by two processes. The conductive strip 41 and the second constant voltage signal line 10 can be made of the same material. For example, the second constant voltage signal line 10 can be made of metal, and the charge blocking portion 4 can also be made of metal.

[0141] Alternatively, the conductive strips 41 and the second constant-voltage signal line 10 may be made of different materials, with the second constant-voltage signal line 10 being made of a metal material. The charge blocking portion 4 may be made of a transparent conductive material. For example, the charge blocking portion 4 may be made of indium tin oxide (ITO). Because ITO has good transparency, when the charge blocking portion 4 is made of ITO, the charge blocking portion 4 can reduce its blocking effect on light passing through the display substrate 100, thereby facilitating the transparent display function of the display substrate 100.

[0142] In some embodiments, see Figure 16 The display substrate 100 further includes a second transfer layer 20. The second transfer layer 20 is located between the charge blocking portion 4 and the second constant voltage signal line 10. For example, the second transfer layer 20 is located on the interlayer dielectric layer 22. The charge blocking portion 4 is coupled to the second transfer layer 20, and the second transfer layer 20 is coupled to the second constant voltage signal line 10.

[0143] For example, see Figure 16 The material of the second transfer layer 20 is a conductive material, for example, a metal material or a transparent conductive material.

[0144] For example, the charge blocking portion 4 may be in direct contact with the second transfer layer 20 , thereby achieving coupling between the charge blocking portion 4 and the second transfer layer 20 .

[0145] By coupling the charge blocking portion 4 to the second transfer layer 20, and the second transfer layer 20 to the second constant-voltage signal line 10, the charge blocking portion 4 can be coupled to the second constant-voltage signal line 10. In this way, when charge accumulates in the substrate 1, the charge blocking portion 4 can transfer the charge in the substrate 1 to the second constant-voltage signal line 10. This can reduce the accumulation of charge in the substrate 1, thereby reducing the impact of the charge accumulated in the substrate 1 on the pixel circuit layer 2, and improving the display defects of the display substrate 100.

[0146] Furthermore, the materials of the charge blocking part 4 and the second transfer layer 20 can be set to include transparent conductive materials. For example, the materials of the charge blocking part 4 and the second transfer layer 20 both include indium tin oxide. This can reduce the blocking of light passing through the display substrate 100, which is conducive to realizing the transparent display function of the display substrate 100.

[0147] In some embodiments, the material of the substrate 1 includes transparent polyimide.

[0148] In the related art, the material of the substrate of the display substrate is polyimide (Polyimide, abbreviated as PI), which has a low transmittance to light passing through the substrate. In order to achieve transparent display, fluorine-containing groups can be introduced into the polyimide material to destroy the complex structure within the polyimide material molecules, thereby obtaining transparent polyimide. But at the same time, because fluorine-containing groups are introduced into the polyimide, and the fluorine ions in the fluorine-containing groups have extremely strong electrical absorption properties, the static electricity generated in the process of making transparent polyimide is difficult to conduct away through the transparent polyimide itself. Therefore, polyimide and transparent polyimide have different degrees of difficulty in releasing static electricity. In the case of applying transparent polyimide to the substrate of the display substrate, the transparent polyimide substrate

[0149] Table 1

[0150]

[0151] As shown in Table 1 above, after the polyimide and transparent polyimide substrates were both subjected to a 10kV voltage for 30 seconds, the peak voltage of the polyimide substrate was 2031.7V, lower than the peak voltage of the transparent polyimide substrate, which was 2536.7V. Furthermore, it took 61.145 seconds for the peak voltage of the polyimide substrate to decay to half of 2031.7V, while the voltage of the transparent polyimide substrate remained at 1681.66V after 180 seconds.

[0152] In addition, after the polyimide substrate and the transparent polyimide substrate were rubbed with cotton cloth (at 400 rpm for 60 s), the voltage carried by the polyimide substrate was 1379.6 V, and the voltage carried by the transparent polyimide substrate was 1496.6 V.

[0153] In summary, compared with polyimide substrates, transparent polyimide substrates have stronger charge adsorption and retention capabilities, and transparent polyimide substrates are difficult to release charges by themselves after adsorbing them.

[0154] In the present disclosure, even if the material of substrate 1 is set to include transparent polyimide, after the transparent polyimide is charged, the charge blocking portion 4 can prevent the accumulation of charge in at least the portion of substrate 1 located in the display area. Compared to related technologies, this configuration can reduce the impact of charge accumulated in substrate 1 on pixel circuit layer 2, thereby improving the display defects of display substrate 100.

[0155] Furthermore, transparent polyimide has a high light transmittance. By setting the material of the substrate 1 to include transparent polyimide, the display substrate 100 can also realize a transparent display function or a camera function under full-screen display, a fingerprint recognition function, and the like.

[0156] In some embodiments, see Figure 16 and Figure 17 The display substrate 100 further includes: an encapsulation layer 30 , a touch layer 40 , a color filter layer 50 and a cover plate 60 , which are located on a side of the light-emitting device layer 3 away from the substrate 1 and are sequentially arranged.

[0157] Illustratively, the touch layer 40 is used to enable the display substrate 100 to achieve a touch function.

[0158] Illustratively, the touch layer 40 includes a first touch electrode 41 and a second touch electrode 42. When a user presses the display substrate 100, the sensing signals of the first touch electrode 41 and the second touch electrode 42 change. By detecting the sensing signals, the user's pressing position can be identified, thereby realizing the touch function of the display substrate 100.

[0159] For example, the present disclosure does not limit the materials of the first touch electrodes 41 and the second touch electrodes 42, which may include transparent conductive materials. For example, the materials of the first touch electrodes 41 and the second touch electrodes 42 are indium tin oxide, indium tin oxide, or Ti / Al / Ti laminated materials.

[0160] Exemplarily, the color filter layer 50 is used to make the light emitted by the light emitting device 31 present different colors.

[0161] Exemplarily, the color filter layer 50 includes a color photoresist pattern 51 and a black matrix pattern (BM for short) 52 for spacing the color photoresist pattern 51 .

[0162] It should be noted that, first, the colored photoresist patterns 51 in the disclosed embodiment can be, for example, a red photoresist pattern (R), a green photoresist pattern (G), and a blue photoresist pattern (B), or can also be a yellow photoresist pattern, a magenta photoresist pattern, and a cyan photoresist pattern. By providing different colored photoresist patterns 51, the light emitted by the light-emitting device 31 exhibits the corresponding color after passing through the colored photoresist patterns 51.

[0163] Second, there is no limitation on the material of the black matrix pattern 52 , as long as it can block light and provide insulation. For example, the material of the black matrix pattern 52 can be black resin or black ink.

[0164] Exemplarily, the cover plate 60 is made of a transparent material and can be used to protect the display substrate 100. For example, the material of the cover plate 60 includes glass.

[0165] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display substrate, characterized in that: The display substrate has a display area; The display substrate comprises: a substrate, a pixel circuit layer and a charge blocking portion; the pixel circuit layer and the charge blocking portion are located on the same side of the substrate; Wherein, the charge blocking portion is located in the display area and contacts the substrate; The display substrate further includes a second constant voltage signal line located in the pixel circuit layer, and the pixel circuit layer includes a plurality of pixel driving circuits; The charge blocking portion includes a plurality of conductive strips, wherein the conductive strips extend in a direction perpendicular to the substrate and are located between two adjacent pixel driving circuits; One end of the conductive strip passes through at least a portion of the pixel circuit layer and contacts the substrate, and the other end of the conductive strip is coupled to the second constant voltage signal line; or, The conductive strip is grounded.

2. The display substrate according to claim 1, wherein: The charge blocking portion is located between the substrate and the pixel circuit layer; The charge blocking portion contacts a surface of the substrate on one side close to the pixel circuit layer.

3. The display substrate according to claim 2, wherein: The charge blocking portion has a planar structure or a mesh structure.

4. The display substrate according to claim 3, wherein: The charge blocking portion has a planar structure, and the material of the charge blocking portion includes amorphous silicon; or The charge blocking portion has a mesh structure, and the material of the charge blocking portion includes amorphous silicon or metal material.

5. The display substrate according to claim 2, wherein: The display substrate further includes a first constant voltage signal line located in the pixel circuit layer; The charge blocking portion is coupled to the first constant voltage signal line.

6. The display substrate according to claim 2, wherein: The display substrate further comprises a non-display area located on at least one side of the display area; The display substrate further includes at least one electrostatic discharge unit located in the non-display area, and the electrostatic discharge unit is coupled to the charge blocking portion.

7. The display substrate according to claim 6, wherein: The display substrate further includes a first transfer layer located in the non-display area; The charge blocking portion is coupled to the first transfer layer, and the first transfer layer is coupled to the electrostatic release unit.

8. The display substrate according to claim 1, wherein: The charge blocking portion and the second constant voltage signal line are formed in the same layer and made of the same material.

9. The display substrate according to claim 1, wherein: The display substrate further includes a second transfer layer; The second transfer layer is located between the charge blocking portion and the second constant voltage signal line; The other end of the charge blocking portion is coupled to the second transfer layer, and the second transfer layer is coupled to the second constant voltage signal line.

10. The display substrate according to claim 1, wherein The charge blocking portion may be made of a metal material or a transparent conductive material.

11. The display substrate according to any one of claims 1 to 10, wherein: The substrate is made of transparent polyimide.

12. The display substrate according to claim 11, wherein: The display substrate further includes: A light emitting device layer is provided on a side of the pixel circuit layer away from the substrate; A touch layer is provided on a side of the light emitting device layer away from the substrate; and The color filter layer is arranged on a side of the touch layer away from the substrate.

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

14. The display device according to claim 13, wherein: The display device further includes an optical element arranged on the non-light-emitting side of the display substrate.

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