Display substrate and display device

Abstract

The present disclosure provides a display substrate and a display device. The display substrate of the present disclosure has a spacing region, a first pixel region and a second pixel region. The display substrate comprises a substrate, a multi-layer functional layer, a filter and a partition structure. The multi-layer functional layer comprises a multi-layer light-emitting layer and a charge generation layer between two adjacent light-emitting layers; each layer of the functional layer comprises a functional part in the pixel region; the partition structure comprises a first partition layer and a second partition layer; the second partition layer comprises a main body part and an extension part on one side of the main body part facing the pixel region; the color of the filter in the first pixel region is the same as the light-emitting color of one of the light-emitting layers on the side of the charge generation layer away from the substrate; the color of the filter in the second pixel region is the same as the light-emitting color of one of the light-emitting layers on the side of the charge generation layer close to the substrate. The width of the extension part adjacent to the first pixel region is smaller than the width of the extension part adjacent to the second pixel region.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically to a display substrate and a display device. Background Technology

[0002] Organic light-emitting diode (OLED) display devices are a new type of display device that uses silicon wafers as substrates. They have the advantages of self-illumination, low power consumption, miniaturization and high PPI (pixel per inch), and have been widely used in various fields of production and life. Summary of the Invention

[0003] This disclosure aims to solve at least one of the technical problems existing in the prior art, and proposes a display substrate and a display device.

[0004] To achieve the above objectives, in a first aspect, this disclosure provides a display substrate having a plurality of pixel regions and a spacing region located between two adjacent pixel regions; the plurality of pixel regions includes a plurality of first pixel regions and a plurality of second pixel regions; the display substrate includes:

[0005] Substrate;

[0006] A multi-layered functional layer is located on one side of the substrate and stacked thereon; the multi-layered functional layer includes a multi-layered light-emitting layer and a charge-generating layer located between two adjacent light-emitting layers; each of the functional layers includes a functional part located in the pixel region; the light-emitting colors of the multi-layered light-emitting layer include multiple colors;

[0007] A filter portion located in the pixel area, the filter portion being located on the side of the functional portion away from the substrate;

[0008] A partition structure located in the interval region, the partition structure comprising: a first partition layer and a second partition layer located on the side of the first partition layer away from the substrate; the second partition layer comprising: a main body portion opposite to the first partition layer, and an extension portion connected to the main body portion, the extension portion being located on the side of the main body portion facing the pixel region;

[0009] The color of the filter portion in the first pixel region is the same as the emission color of one of the light-emitting layers located on the side of the charge generation layer away from the substrate; the color of the filter portion in the second pixel region is the same as the emission color of one of the light-emitting layers located on the side of the charge generation layer closer to the substrate.

[0010] The width of the extension adjacent to the first pixel area is smaller than the width of the extension adjacent to the second pixel area.

[0011] In some embodiments, the multilayer light-emitting layer includes a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer. The first light-emitting layer is located on the side of the charge-generating layer away from the substrate. The second light-emitting layer and the third light-emitting layer are located on the side of the charge-generating layer close to the substrate and are arranged sequentially along the direction close to the substrate.

[0012] The filter in the first pixel region is a first color filter; the filter in the plurality of second pixel regions includes a plurality of second color filters and a plurality of third color filters; wherein, the second color filter has the same emission color as the second light-emitting layer, and the third color filter has the same emission color as the third light-emitting layer;

[0013] The width of the extension adjacent to the second pixel area having the second color filter is less than or equal to the width of the extension adjacent to the second pixel area having the third color filter.

[0014] In some embodiments, the plurality of pixel regions are arranged in multiple rows, each row including a plurality of pixel units, each pixel unit including the first pixel region, at least one second pixel region having the second color filter portion, and at least one second pixel region having the third color filter portion.

[0015] In some embodiments, the first light-emitting layer emits blue light; the second light-emitting layer emits green light; and the third light-emitting layer emits red light.

[0016] In some embodiments, the multilayer light-emitting layer includes a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer. The first light-emitting layer and the second light-emitting layer are located on the side of the charge-generating layer away from the substrate and are sequentially disposed along a direction close to the substrate. The third light-emitting layer is located on the side of the charge-generating layer close to the substrate.

[0017] The filter portion in the plurality of first pixel regions includes a plurality of first color filter portions and a plurality of second color filter portions; the filter portion in the second pixel region is a third color filter portion; wherein, the first color filter portion has the same emission color as the first light-emitting layer, and the second color filter portion has the same emission color as the second light-emitting layer;

[0018] The width of the extension adjacent to the first pixel area having the first color filter is less than or equal to the width of the extension adjacent to the first pixel area having the second color filter.

[0019] In some embodiments, the plurality of pixel regions are arranged in multiple rows, each row including a plurality of pixel units, each pixel unit including the second pixel region, at least one first pixel region having the first color filter portion, and at least one first pixel region having the second color filter portion.

[0020] In some embodiments, the first light-emitting layer emits green light; the second light-emitting layer emits red light; and the third light-emitting layer emits blue light.

[0021] In some embodiments, the width of the extension adjacent to the first pixel region is 0.035 to 0.05 μm, and the width of the extension adjacent to the second pixel region is 0.045 to 0.065 μm.

[0022] In some embodiments, the surface of the partition structure away from the substrate includes a first sub-surface and a second sub-surface located on the side of the first sub-surface closer to the pixel region, wherein the maximum distance from the first sub-surface to the substrate is less than the maximum distance between the second sub-surface and the substrate.

[0023] In some embodiments, each of the functional layers further includes redundant functional portions located on the side of the partition structure away from the substrate.

[0024] The redundant functional part includes a flat part opposite to the first sub-surface and a protruding part opposite to the second sub-surface;

[0025] The maximum distance from the surface of the protrusion away from the substrate to the substrate is greater than the maximum distance from the surface of the flat portion away from the substrate to the substrate.

[0026] In some embodiments, the display substrate further includes a pixel defining layer located between the partition structure and the substrate;

[0027] The pixel defining layer includes: a first defining layer and a second defining layer located on the side of the first defining layer away from the substrate;

[0028] The orthogonal projection of the partition structure on the substrate covers and extends beyond the orthogonal projection of the first defining layer on the substrate.

[0029] The orthogonal projection of the second defining layer on the substrate covers and extends beyond the orthogonal projection of the partition structure on the substrate.

[0030] In some embodiments, the display substrate further includes:

[0031] A first electrode is located between the pixel defining layer and the substrate; the first electrode corresponds one-to-one with the filter portion; the color of the filter portion in the plurality of pixel regions includes blue, red and green;

[0032] Wherein, the distance from the surface of the first electrode corresponding to the blue filter portion away from the substrate to the substrate is greater than the distance from the surface of the first electrode corresponding to the red filter portion away from the substrate to the substrate; the distance from the surface of the first electrode corresponding to the red filter portion away from the substrate to the substrate is greater than the distance from the surface of the first electrode corresponding to the green filter portion away from the substrate to the substrate.

[0033] In some embodiments, the substrate material includes silicon.

[0034] In a second aspect, this disclosure provides a display device including a display substrate as described in any of the above-described embodiments. Attached Figure Description

[0035] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0036] Figure 1A This is a schematic diagram of the planar structure of the display substrate in some embodiments of this disclosure;

[0037] Figure 1B It is along Figure 1A The diagram shows a cross-sectional view of the YX lines in the display substrate.

[0038] Figure 1C It is along Figure 1A The diagram shows a cross-sectional view of the XX line in the display substrate.

[0039] Figure 1D yes Figure 1C A partial cross-sectional structural diagram shown in the schematic diagram.

[0040] Figure 2A This is a schematic diagram of the planar structure of the display substrate in some other embodiments of this disclosure;

[0041] Figure 2B It is along Figure 2A The diagram shows a cross-sectional view of the XY lines in the display substrate.

[0042] Figure 2C It is along Figure 2A The diagram shows a cross-sectional view of the XX line in the display substrate.

[0043] Figure 2Dyes Figure 2C A partial cross-sectional structural diagram shown in the schematic diagram.

[0044] Figure 3 It is along Figure 1A The YX lines and along the display substrate shown Figure 2A The diagram shows a partial cross-sectional structure of the XY lines in the display substrate.

[0045] Figure 4 This is a plan view of the filter portion in the display substrate in some embodiments of this disclosure;

[0046] Figure 5 This is a plan view of the filter portion in the display substrate in some other embodiments of this disclosure;

[0047] Figure 6A These are schematic diagrams illustrating simulation effects in some embodiments of this disclosure;

[0048] Figure 6B These are schematic diagrams illustrating simulation effects in other embodiments of this disclosure;

[0049] Figure 7 This is a cross-sectional structural schematic diagram of the display substrate in some other embodiments of this disclosure;

[0050] Figure 8 This is a cross-sectional structural schematic diagram of the display substrate in some other embodiments of this disclosure;

[0051] Figure 9 This is a cross-sectional structural diagram of the display substrate in some other embodiments of this disclosure.

[0052] 1. Substrate; 2. First electrode; 3. Functional layer; 30. Light-emitting layer; 4. Partition structure; 31. Charge generation layer; 301. First light-emitting layer; 302. Second light-emitting layer; 303. Third light-emitting layer; 41. First partition layer; 42. Second partition layer; 421. Main body; 422. Extension; 401. First sub-surface; 402. Second sub-surface; 403. Connecting surface; 404. Protruding surface; 310. Redundant functional unit; 320. Functional unit; 31 1. Flat portion; 312. Protruding portion; 5. Pixel limiting layer; 51. First limiting layer; 52. Second limiting layer; 60. Filter portion; 601. First color filter portion; 602. Second color filter portion; 603. Third color filter portion; 21. First conductive layer; 22. Second conductive layer; 23. Third conductive layer; 24. Fourth conductive layer; 7. First insulating layer; 25. Sixth conductive layer; 26. Seventh conductive layer; 27. Eighth conductive layer; 8. Second insulating layer. Detailed Implementation

[0053] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0055] Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0056] As used herein, “parallel” and “perpendicular” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°.

[0057] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0058] This document describes exemplary embodiments with reference to sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and regions is enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Therefore, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. Thus, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0059] The resolution of silicon-based OLED display substrates can typically reach over 3000 PPI. However, fine-metal masks (FMMs) can only achieve a maximum of around 800 PPI. This means that it's difficult to use a side-by-side (SBS) method for OLED deposition on silicon-based OLED substrates. Therefore, it's necessary to use methods such as, but not limited to, tall fences (TF), dig-on-wafer (DOW), and undercut to separate the OLEDs. Consequently, full-surface OLED deposition has become an inevitable choice in the fabrication of silicon-based OLED display substrates. Based on this, silicon-based OLED display substrates can only use white light-emitting devices. In some embodiments of related technologies, the white light-emitting device uses a single light-emitting unit to emit white light. This single light-emitting unit includes a light-emitting layer, which can use a combination of different light-emitting materials to achieve white light emission. However, in this case, the brightness of the silicon-based OLED display substrate is generally between 80-600 nits. Achieving high brightness (e.g., greater than 1000 nits) using this single light-emitting unit would severely impact the power consumption and lifespan of the light-emitting unit. In other embodiments of the related technology, the silicon-based OLED display substrate uses two or more light-emitting units to form a stacked tandem OLED device to emit white light. Two adjacent light-emitting units can be connected in series through a charge generation layer (CGL). Different light-emitting units can use different light-emitting layers to emit different colors of light, thus achieving the effect of emitting white light through superposition in the tandem OLED device. However, in this case, because the tandem OLED device has many film layers, for example, when using an isolation structure to separate the tandem OLED device at the anode, it can lead to problems such as significant distortion of the film thickness of some light-emitting layers near the isolation structure and poor isolation stability between adjacent tandem OLED devices. These issues affect the light emission effect of the tandem OLED device and ultimately the display effect of the silicon-based OLED display substrate.

[0060] In order to at least alleviate or solve one of the aforementioned technical problems, this disclosure provides a display substrate and a display device.

[0061] In some embodiments, this disclosure provides a display substrate, Figure 1A This is a schematic diagram of the planar structure of the display substrate in some embodiments of this disclosure. Figure 2A This is a schematic diagram of the planar structure of the display substrate in some other embodiments of this disclosure. For example... Figure 1A and Figure 2A As shown, the display substrate has multiple pixel areas and a spacing region B located between two adjacent pixel areas. The multiple pixel areas include multiple first pixel areas A1 and multiple second pixel areas A2.

[0062] Figure 1B It is along Figure 1A The diagram shows a cross-sectional view of the YX lines in the display substrate. Figure 2B It is along Figure 2A The diagram shows a cross-sectional view of the XY lines in the display substrate. Figure 1B and Figure 2B As shown, the display substrate provided in this disclosure includes: a substrate 1, a multilayer functional layer 3 stacked on one side of the substrate 1, a filter portion 60 located in a pixel region, and a partition structure 4 located between the functional layer 3 and the substrate 1. The multilayer functional layer 3 includes: a plurality of light-emitting layers 30 sequentially disposed along a direction away from the substrate 1, and at least one charge-generating layer 31 located between two adjacent light-emitting layers 30. That is, each light-emitting layer 30 and each charge-generating layer 31 is a functional layer 3. Each functional layer 3 includes a functional portion 320 located in the pixel region. For example, each functional layer 3 includes a functional portion 320 located in a first pixel region A1 and a functional portion 320 located in a second pixel region A2. Each functional layer 3 covers the first pixel region A1, the second pixel region A2, and the spacing region B. Accordingly, the multilayer functional layer 3 forms at least a portion of a light-emitting device in the pixel region; for example, the multilayer functional layer 3 forms at least a portion of a first light-emitting device in the first pixel region A1, and at least a portion of a second light-emitting device in the second pixel region A2. Furthermore, the light emission colors of the multiple light-emitting layers 30 include a variety of colors. For example, the multiple light-emitting layers 30 include a first light-emitting layer 301, a second light-emitting layer 302, and a third light-emitting layer 303 that emit light of different colors respectively. The light emission colors of the first light-emitting layer 301, the second light-emitting layer 302, and the third light-emitting layer 303 are mixed to produce white light. It can also be understood that the light emission colors of the first light-emitting device and the second light-emitting device are both white.

[0063] The filter section 60 is located on the side of the functional section 320 away from the substrate 1.

[0064] Partition structure 4 is located in partition area B. Figure 1C It is along Figure 1AThe diagram shows a cross-sectional view of the XX line in the display substrate. Figure 1D yes Figure 1C The diagram shows a partial cross-sectional structure. Figure 2C It is along Figure 2A The diagram shows a cross-sectional view of the XX line in the display substrate. Figure 2D yes Figure 2C The diagram shows a partial cross-sectional structure. Figure 3 It is along Figure 1A The YX lines and along the display substrate shown Figure 2A The diagram shows a partial cross-sectional view of the XY lines in the display substrate. Figure 1D , Figure 2D and Figure 3 As shown, the partition structure 4 includes a first partition layer 41 and a second partition layer 42 located on the side of the first partition layer 41 away from the substrate 1. The second partition layer 42 includes a main body portion 421 opposite to the first partition layer 41 and an extension portion 422 connected to the main body portion 421. The extension portion 422 is located on the side of the main body portion 421 facing the pixel area.

[0065] In the first pixel region A1, the color of the filter portion 60 is the same as the emission color of one of the light-emitting layers 30 located on the side of the charge generation layer 31 away from the substrate 1, and the color of the filter portion 60 in the second pixel region A2 is the same as the emission color of one of the light-emitting layers 30 located on the side of the charge generation layer 31 closer to the substrate 1. For example, in Figure 1B and Figure 1C In the illustrated embodiment, the first light-emitting layer 301 is located on the side of the charge-generating layer 31 away from the substrate 1, and the second light-emitting layer 302 and the third light-emitting layer 303 are located on the side of the charge-generating layer 31 closer to the substrate 1. Therefore, the color of the filter portion 60 in the first pixel region A1 is the same as the light-emitting color of the first light-emitting layer 301, and the color of the filter portion 60 in the second pixel region A2 is the same as the light-emitting color of either the second light-emitting layer 302 or the third light-emitting layer 303. Figure 2B and Figure 2C In the embodiment shown, the first light-emitting layer 301 and the second light-emitting layer 302 are located on the side of the charge-generating layer 31 away from the substrate 1, and the third light-emitting layer 303 is located on the side of the charge-generating layer 31 close to the substrate 1. Then, the color of the filter portion 60 in the first pixel area A1 is the same as the light-emitting color of the first light-emitting layer 301 or the second light-emitting layer 302, and the color of the filter portion 60 in the second pixel area A2 is the same as the light-emitting color of the third light-emitting layer 303.

[0066] Such as 1C and Figure 3 As shown, and as Figure 2C and Figure 3As shown, the width H1 of the extension 422 adjacent to the first pixel area A1 is smaller than the width H2 of the extension 422 adjacent to the second pixel area A2.

[0067] In this embodiment, the color of the filter portion 60 in the first pixel region A1 is the same as the emission color of one of the light-emitting layers 30 on the side of the charge-generating layer 31 away from the substrate 1, and the width H1 of the extension portion 422 adjacent to the first pixel region A1 is relatively narrow. Based on this, the narrower extension portion 422 blocks fewer functional layers, thereby reducing the distortion of the light-emitting layer 30 on the side of the charge-generating layer 31 away from the substrate, ensuring the emission effect of the light-emitting layer 30 on the side of the charge-generating layer 31 away from the substrate in the first pixel region A1. Meanwhile, the color of the filter portion 60 in the second pixel region A2 is the same as the emission color of one of the light-emitting layers 30 on the side of the charge-generating layer 31 close to the substrate 1, and the width H2 of the extension portion 422 adjacent to the second pixel region A2 is relatively large. Based on this, the wider extension portion 422 can ensure effective blocking of functional layers at the position of the spacing region B close to the second pixel region A2.

[0068] Optionally, the multilayer functional layer 3 further includes at least one film layer for transporting electrons or holes. For example, in Figure 1B and Figure 1C In the embodiments shown, and in Figure 2B and Figure 2C In the embodiment shown, the multilayer functional layer 3 further includes a hole injection layer HIL and a hole transport layer HTL located between the third light-emitting layer 303 closest to the substrate 1 and the substrate 1, and sequentially disposed along the direction away from the substrate 1.

[0069] exist Figure 1B and Figure 1C In the embodiment shown, the multilayer functional layer 3 further includes: an electron transport layer ETL located between the second light-emitting layer 302 and the charge generation layer 31, a hole transport layer HTL located between the first light-emitting layer 301 and the charge generation layer 31, a hole blocking layer HBL located on the side of the first light-emitting layer 301 away from the substrate 1 and arranged sequentially along the direction away from the substrate 1, an electron transport layer ETL and an electron injection layer EIL.

[0070] exist Figure 2B and Figure 2C In the embodiment shown, the multilayer functional layer 3 further includes: an electron transport layer ETL located between the third light-emitting layer 303 and the charge generation layer 31, a hole transport layer HTL located between the second light-emitting layer 302 and the charge generation layer 31, and an electron transport layer ETL and an electron injection layer EIL located on the side of the first light-emitting layer 301 away from the substrate and arranged sequentially in the direction away from the substrate 1.

[0071] Alternatively, the electron transport layer (ETL) and other films may comprise one or more layers of the same or different materials but with the same function. For example, the electron transport layer (ETL) located between the second light-emitting layer 302 and the charge-generating layer 31 may comprise a first electron transport layer and a second electron transport layer stacked together.

[0072] In this embodiment, the color of the filter portion 60 in the first pixel region A1 is the same as the emission color of one of the light-emitting layers 30 located on the side of the charge-generating layer 31 away from the substrate 1. The color of the filter portion 60 in the second pixel region A2 is the same as the emission color of one of the light-emitting layers 30 located on the side of the charge-generating layer 31 close to the substrate 1. Furthermore, the width H1 of the extension portion 422 adjacent to the first pixel region A1 is smaller than the width H2 of the extension portion 422 adjacent to the second pixel region A2. In this case, since the width H1 of the extension portion 422 adjacent to the first pixel region A1 is smaller than the width H2 of the extension portion 422 adjacent to the second pixel region A2, the functional layer 3 is disconnected by the partition structure 4 at the position of the partition region B near the first pixel region A1 and at the position of the partition region B near the second pixel region A2, respectively. For example, the number of layers disconnected by the partition structure 4 may be different. Specifically, in one example, the nth functional layer 3 is disconnected by the partition structure 4 at the position of the spacing region B near the first pixel region A1, and the mth functional layer 3 is disconnected by the partition structure 4 at the position of the spacing region B near the second pixel region A2, where n > m. That is, along the direction away from the substrate 1, the first to mth functional layers 3 are disconnected by the partition structure 4 at the position of the spacing region B near the first pixel region A1. When m = 1, only the first functional layer 3 is disconnected by the partition structure 4 at the position of the spacing region B near the first pixel region A1; the (m+1)th to the last functional layer 3 are not disconnected by the partition structure 4. Similarly, along the direction away from the substrate 1, the first to nth functional layers 3 are disconnected by the partition structure 4 at the position of the spacing region B near the first pixel region A1; the (n+1)th to the last functional layer 3 are not disconnected by the partition structure 4. Specifically, the functional layers 3 from layer 1 to layer m are disconnected by the partition structure 4 at the position near the first pixel region A1 in the interval region B. This helps reduce the distortion of the light-emitting layers 30 that are not disconnected from layer m+1 to the last functional layer 3, and also helps improve the carrier transfer rate in the undisconnected light-emitting layers 30. At the same time, the disconnection of the functional layers 3 from layer 1 to layer n at the position near the first pixel region A1 in the interval region B helps improve the isolation effect of the partition structure 4 on the multi-layer functional layers 3, that is, it helps improve the isolation reliability between the light-emitting devices in each pixel region. Therefore, in this embodiment of the present disclosure, by making the width H1 of the extension 422 adjacent to the first pixel area A1 smaller than the width H2 of the extension 422 adjacent to the second pixel area A2, the distortion degree of the unbroken light-emitting layer 30 in the first pixel area A1 can be reduced, thereby further reducing low grayscale light leakage and carrier accumulation during light emission, extending the service life of the display substrate, and improving the isolation reliability between light-emitting devices in each pixel area, thereby reducing the lateral and longitudinal leakage current effects caused by the distortion of the light-emitting layer 30 in the interval area B, thereby further improving the grayscale stability of the display substrate.

[0073] For example, in one example, such as Figure 1B and Figure 1C As shown, in the interval region B near the first pixel region A1, the n functional layers separated by the partition structure 4 include at least one charge generation layer 31 and each light-emitting layer 30 between the charge generation layer 31 and the substrate 1. In the interval region B near the second pixel region A2, the m functional layers separated by the partition structure 4 include each light-emitting layer 30 between the charge generation layer 31 closest to the substrate 1 and the substrate 1. Specifically, the n functional layers include the charge generation layer 31, the first light-emitting layer 301, and the second light-emitting layer 302, and the m functional layers include the first light-emitting layer 301 and the second light-emitting layer 302. That is, the first light-emitting layer 301 and the second light-emitting layer 302 are separated by the partition structure 4 in the interval region B near the first pixel region A1, and the charge generation layer 31, the first light-emitting layer 301, and the second light-emitting layer 302 are separated by the partition structure 4 in the interval region B near the second pixel region A2. After the charge generation layer 31, the first light-emitting layer 301 and the second light-emitting layer 302 are separated by the isolation structure 4, a receiving space will be formed at the separation position. A part of the third light-emitting layer 303 on the side of the charge generation layer 31 away from the substrate 1 will enter the receiving space, thereby buffering the degree of distortion of the third light-emitting layer 303.

[0074] It should be noted that since the hole injection layer HIL and the hole transport layer HTL are located between the substrate 1 and the first light-emitting layer 301, the hole injection layer HIL and the hole transport layer HTL are also separated by the partition structure 4 at the positions near the first pixel area A1 and near the second pixel area A2 in the spacer region B. For the electron transport layer ETL located between the second light-emitting layer 302 and the charge generation layer 31, since the electron transport layer ETL is on the side of the second light-emitting layer 302 away from the substrate 1, the electron transport layer ETL is separated by the partition structure 4 at the position near the second pixel area A2 in the spacer region B. It may or may not be separated by the partition structure 4 at the position near the first pixel area A1 in the spacer region B. Figure 1B In the embodiment shown, the electron transport layer (ETL) is interrupted by the isolation structure 4 near the first pixel area A1 in the spacing region B.

[0075] In this embodiment, the charge-generating layer 31 closest to the substrate 1 and each light-emitting layer 30 between the substrate 1 and the substrate 1 are separated by the partition structure 4 at a position in the spacing region B near the first pixel region A1. This helps to reduce the distortion of the light-emitting layers 30 that are not separated by the partition structure 4, for example, in Figure 2 and Figure 3In the illustrated embodiment, it is beneficial to reduce the distortion of the third light-emitting layer 303, thereby improving the carrier transfer rate in the third light-emitting layer 303. At least one charge-generating layer 31 and each light-emitting layer between the charge-generating layer 31 and the substrate 1 are separated by the partition structure 4 at the position of the spacing region B near the second pixel region A2, for example, in Figure 2 and Figure 3 In the illustrated embodiment, the charge generation layer 31 is disconnected by the isolation structure 4, which ensures the isolation effect of the multi-layer functional layers. Furthermore, reducing the distortion degree of the third light-emitting layer 303 can reduce low-grayscale light leakage, reduce carrier accumulation, and reduce lifetime voltage rise. The isolation effect of the multi-layer functional layers helps to reduce the lateral and longitudinal leakage current effects caused by the distortion of the light-emitting layer 30 in the interval region B, thereby improving the stability of the product's high and low grayscale levels.

[0076] Optionally, the charge generation layer 31 includes a hole generation layer and an electron generation layer stacked together (the hole generation layer and electron generation layer are not shown in the figure). Furthermore, the electron generation layer is stacked with the electron transport layer (ETL), and the hole generation layer is stacked with the hole transport layer. That is, the electron generation layer is located between the electron transport layer and the hole generation layer, and the hole generation layer is located between the hole transport layer and the electron generation layer. For example, as shown in Figure 2 and... Figure 3 In the embodiment shown, the hole generation layer and the electron generation layer are arranged sequentially along the direction away from the substrate 1.

[0077] Optionally, the charge generation layer 31 further includes a buffer layer stacked with the hole generation layer. For example, the buffer layer is located between the hole generation layer and the electron generation layer.

[0078] Optionally, the light-emitting layer 30 may include a main light-emitting layer and an auxiliary light-emitting layer stacked together.

[0079] Optionally, the material of the first partition layer 41 includes silicon nitride, and the material of the second partition layer 42 includes silicon oxide.

[0080] In some embodiments, such as Figure 1C and Figure 1DAs shown, the multilayer light-emitting layer 30 includes a first light-emitting layer 301, a second light-emitting layer 302, and a third light-emitting layer 303. The first light-emitting layer 301 is located on the side of the charge-generating layer 31 away from the substrate 1, while the second and third light-emitting layers 302 and 303 are located on the side of the charge-generating layer 31 closer to the substrate 1 and are sequentially arranged along the direction closer to the substrate 1. The filter portion 60 in the first pixel region A1 is a first color filter portion 601; the filter portions 60 in the plurality of second pixel regions A2 include a plurality of second color filters 602 and a plurality of third color filters 603. The first color filter portion 601 has the same emission color as the first light-emitting layer, the second color filter portion 602 has the same emission color as the second light-emitting layer 302, and the third color filter portion 603 has the same emission color as the third light-emitting layer 303.

[0081] In this case, the width H21 of the extension 422 adjacent to the second pixel area A2 with the second color filter 602 is less than or equal to the width H22 of the extension 422 adjacent to the second pixel area A2 with the third color filter 603. This balances the stability of the second pixel area A2 near the second color filter 602 and the second pixel area A2 near the third color filter 603 in the interval area B, which are disconnected by the blocking structure 4, as well as the degree of distortion of the uninterrupted functional layer 3. This further avoids phenomena such as leakage in the functional layer 3 that affect the display effect.

[0082] In some embodiments, such as Figure 1A and Figure 1B As shown, the first light-emitting layer 301 emits blue light, the second light-emitting layer 302 emits green light, and the third light-emitting layer 303 emits red light.

[0083] In this embodiment, the first light-emitting layer 301 emitting blue light is located on the side of the charge-generating layer 31 away from the substrate 1, while the second light-emitting layer 302 emitting green light and the third light-emitting layer 303 emitting red light are located on the side of the charge-generating layer 31 closer to the substrate 1. In this case, the width H1 of the extension 422 adjacent to the first pixel region A1 with the blue filter portion 60 is smaller than the width H2 of the extension 422 adjacent to the second pixel region A2 with the green filter portion 60, and the width H1 of the extension 422 adjacent to the first pixel region A1 with the blue filter portion 60 is smaller than the width H2 of the extension 422 adjacent to the second pixel region A2 with the red filter portion 60. That is, at the position of the spacing region B near the first pixel region A1, the functional layer 3 is less broken by the partition structure 4. For example, the film layer of the charge-generating layer 31 on the side closer to the substrate 1 is broken, which is beneficial to reducing the distortion degree of the first light-emitting layer 301 emitting blue light and improving the blue light transfer rate. In the interval region B near the second pixel region A2, the functional layer 3 is more partially separated by the isolation structure 4. For example, the charge generation layer 31 is also separated by the isolation structure 4 to ensure the reliability of the isolation of each light-emitting device in the pixel region. Furthermore, the width H21 of the extension 422 adjacent to the second pixel region A2 with the green filter 60 is smaller than the width H22 of the extension 422 adjacent to the second pixel region A2 with the red filter 60. In this case, the distortion degree of the functional layer 3 in the second pixel region A2 with the green filter 60 can be further reduced, thereby further improving the light-emitting effect and carrier transport effect of the functional layer 3 in the second pixel region A2 with the green filter 60.

[0084] Figure 4 This is a planar schematic diagram of the filter portion in the display substrate according to some embodiments of this disclosure. (In conjunction with...) Figure 1A and Figure 4 It can be seen that multiple pixel regions are arranged in multiple rows, and each row includes multiple pixel units. Figure 1A and Figure 4 (The portion enclosed by the dashed box) The pixel unit includes a first pixel area A1, at least one second pixel area A2 having a second color filter 602, and at least one second pixel area A2 having a third color filter 603. For example, in... Figure 1A and Figure 4 In the embodiment shown, the pixel unit includes a first pixel area A1, a second pixel area A2 having a second color filter 602, and a second pixel area A2 having a third color filter 603.

[0085] Optionally, in some embodiments, the first color filter in the first pixel area A1 is blue (B), the second color filter 602 is green (G), and the third color filter is red (R).

[0086] In some embodiments, such as Figure 2C and Figure 2D As shown, the multilayer light-emitting layer 30 includes a first light-emitting layer 301, a second light-emitting layer 302, and a third light-emitting layer 303. The first and second light-emitting layers 301 and 302 are located on the side of the charge-generating layer 31 away from the substrate 1 and are sequentially disposed along a direction close to the substrate 1. The third light-emitting layer 303 is located on the side of the charge-generating layer 31 close to the substrate 1. The filter portions 60 in the plurality of first pixel regions A1 include a plurality of first color filter portions 601 and a plurality of second color filter portions 602; the filter portion 60 in the second pixel region A2 is a third color filter portion 603. The first color filter portion 601 emits the same color as the first light-emitting layer 301, and the second color filter portion 602 emits the same color as the second light-emitting layer 302. The width H11 of the extension portion 422 adjacent to the first pixel region A1 having the first color filter portion 601 is less than or equal to the width H12 of the extension portion 422 adjacent to the first pixel region A1 having the second color filter portion 602.

[0087] In this embodiment, based on the fact that the width of the narrower extension 422 adjacent to the first pixel area A1 can ensure the reduction of the distortion degree of the light-emitting layer 30 on the side of the charge-generating layer 31 away from the substrate 1, by further making the width H11 of the extension 422 adjacent to the first pixel area A1 with the first color filter 601 less than or equal to the width H12 of the extension 422 adjacent to the first pixel area A1 with the second color filter 602, the stability of the first pixel area A1 with the first color filter 601 and the first pixel area A1 with the second color filter 602 that are disconnected by the blocking structure 4 can be balanced, as well as the distortion degree of the undisconnected functional layer 3, and further avoids the phenomenon of leakage current in the functional layer 3 affecting the display effect.

[0088] Optionally, in some embodiments, the first light-emitting layer 301 emits green light, the second light-emitting layer 302 emits red light, and the third light-emitting layer 303 emits blue light.

[0089] Optionally, in some embodiments, the color of the first color filter 601 is green (G), the color of the second color filter 602 is red (R), and the color of the third color filter... The color is blue (B).

[0090] In this embodiment, the first light-emitting layer 301 emitting green light and the second light-emitting layer 302 emitting red light are located on the side of the charge-generating layer 31 away from the substrate 1. This can be understood as the multilayer light-emitting layer 30 on the side of the charge-generating layer 31 away from the substrate 1 emitting yellow light. The third light-emitting layer 303 emitting blue light is located on the side of the charge-generating layer 31 close to the substrate 1. In this case, the width H1 of the extension 422 adjacent to the first pixel area A1 with the green filter 60 is smaller than the width H2 of the extension 422 adjacent to the second pixel area A2 with the blue filter 60, and the width H1 of the extension 422 adjacent to the first pixel area A1 with the red filter 60 is smaller than the width H2 of the extension 422 adjacent to the second pixel area A2 with the blue filter 60. That is, in the spacer region B near the first pixel region A1, the functional layer 3 is less broken by the partition structure 4. For example, the film layer of the charge generation layer 31 near the substrate 1 is broken, which helps to reduce the distortion of the first light-emitting layer 301 emitting red light and the second light-emitting layer 302 emitting green light, and helps to improve the transfer rate of red and green light. In the spacer region B near the second pixel region A2, the functional layer 3 is more broken by the partition structure 4. For example, the charge generation layer 31 is also broken by the partition structure 4 to ensure the reliability of the partition of each light-emitting device in the pixel region. Furthermore, the width H11 of the extension 422 adjacent to the first pixel region A1 with the green filter 60 is smaller than the width H12 of the extension 422 adjacent to the first pixel region A1 with the red filter 60. In this case, the distortion of the functional layer 3 in the first pixel region A1 with the green filter 60 can be further reduced, thereby further improving the light emission effect and the carrier transport effect of the functional layer 3 in the first pixel region A1 with the green filter 60.

[0091] Figure 5 This is a plan view of the filter portion in the display substrate in some other embodiments of this disclosure. (In conjunction with...) Figure 2A and Figure 5 It can be seen that multiple pixel regions are arranged in multiple rows, and each row includes multiple pixel units. Figure 2A and Figure 5 (The portion enclosed by the dashed box) Each pixel unit includes a second pixel area A2, at least one first pixel area A1 having a first color filter 601, and at least one first pixel area A1 having a second color filter 602. For example, in... Figure 2A and Figure 5 In the embodiment shown, the pixel unit includes a second pixel area A2, a first pixel area A1 having a first color filter 601, and a first pixel area A1 having a second color filter 602.

[0092] In some embodiments, such as Figure 1B , Figure 1C , Figure 1D and Figure 3 In the embodiments shown, and in such Figure 2B , Figure 2C , Figure 2D and Figure 3 In the illustrated embodiment, the width H1 of the extension 422 adjacent to the first pixel area A1 is 0.035 to 0.05 μm, for example, it can be 0.035 μm, 0.036 μm, 0.037 μm, 0.038 μm, 0.039 μm, 0.04 μm, 0.041 μm, 0.042 μm, 0.043 μm, 0.044 μm, 0.045 μm, 0.046 μm, 0.047 μm, 0.048 μm, 0.049 μm or 0.05 μm. The width H2 of the extension 422 adjacent to the second pixel area A2 is 0.045 to 0.065 μm, for example, it can be 0.045 μm, 0.046 μm, 0.047 μm, 0.048 μm, 0.049 μm, 0.05 μm, 0.051 μm, 0.052 μm, 0.053 μm, 0.054 μm, 0.055 μm, 0.056 μm, 0.057 μm, 0.058 μm, 0.059 μm, 0.06 μm, 0.061 μm, 0.062 μm, 0.063 μm, 0.064 μm or 0.065 μm.

[0093] In this embodiment of the present disclosure, by setting specific values ​​for the width H1 of the extension 422 adjacent to the first pixel area A1 and the width H2 of the extension 422 adjacent to the second pixel area A2, it is possible to ensure that the n-layer functional layer is disconnected by the partition structure 4 at the position of the interval B near the first pixel area A1 and the m-layer functional layer is disconnected by the partition structure 4 at the position of the interval B near the second pixel area A2.

[0094] Optionally, the width H1 of the extension 422 adjacent to the first pixel region A1 and the width H2 of the extension 422 adjacent to the second pixel region A2 are both set to 0.047±0.005μm. This avoids the extension 422 adjacent to the first pixel region A1 and the extension 422 adjacent to the second pixel region A2 being too large, which would cause the light-emitting layer 30 on the side of the charge generation layer 31 away from the substrate 1 to suffer increased leakage. At the same time, it avoids the extension 422 adjacent to the first pixel region A1 and the extension 422 adjacent to the second pixel region A2 being too small, which would cause the light-emitting layer 30 on the side of the charge generation layer close to the substrate to leak.

[0095] Figure 6A These are simulation effect diagrams from some embodiments of this disclosure, specifically, Figure 6AThe width H1 of the extension 422 near the first pixel area A1 or the width H2 of the extension 422 near the second pixel area A2 is given to different values. The impact on the performance of light-emitting devices. Figure 6A The vertical axis CIEy represents the coordinates of the color point, and the horizontal axis voltage represents the leakage voltage (unit: V). Figure 6A As shown in the figure, when the width H1 of the extension 422 is When CIEy is at its maximum, the leakage voltage of the light-emitting device is at its minimum.

[0096] Figure 6B These are simulation effect diagrams from other embodiments of this disclosure, specifically, Figure 6B The minimum thickness of the third light-emitting layer 303 on the side of the charge-generating layer 31 away from the substrate 1 is given when the width H1 of the extension 422 near the first pixel area A1 or the width H2 of the extension 422 near the second pixel area A2 is set to different values.

[0097] In this embodiment, the width H1 of the extension 422 close to the first pixel area A1 is smaller than the width H2 of the extension 422 close to the second pixel area A2. This can further reduce the distortion of the light-emitting layer 30 located on the side of the charge generation layer 31 away from the substrate 1 while ensuring the isolation effect of the isolation structure 4, thereby reducing the impact on the display performance of the display substrate.

[0098] Figure 7 This is a schematic cross-sectional view of the display substrate in some other embodiments of this disclosure. In such... Figure 7 In the embodiment shown, the surface of the partition structure 4 away from the substrate 1 includes a first sub-surface 401 and a second sub-surface 402 located on the side of the first sub-surface 402 near the pixel area. The maximum distance D1 between the first sub-surface 401 and the substrate 1 is less than the maximum distance D2 between the second sub-surface 402 and the substrate 1.

[0099] Optionally, the second sub-face 402 includes a connecting face 403 and a protruding face 404.

[0100] In this embodiment of the disclosure, by making the maximum distance D1 between the first sub-surface 401 and the substrate 1 smaller than the maximum distance D2 between the second sub-surface 402 and the substrate 1, the isolation effect of the partition structure 4 on the multilayer functional layer 3 can be further guaranteed in the position of the interval region B near the pixel region.

[0101] Figure 8 This is a schematic cross-sectional view of the display substrate in some other embodiments of this disclosure. Figure 8In the illustrated embodiment, each functional layer 3 further includes a redundant functional portion 310 located on the side of the partition structure 4 away from the substrate 1. The redundant functional portion 310 includes a flat portion 311 opposite to the first sub-surface 401 and a protruding portion 312 opposite to the second sub-surface 402. Figure 8 The first sub-face 401 and the second sub-face 402 are not marked, but can be combined with Figure 7 (For understanding). The maximum distance D4 from the surface of the protrusion 312 away from the substrate 1 to the substrate 1 is greater than the maximum distance D3 from the surface of the flat portion 311 away from the substrate 1 to the substrate 1.

[0102] In some embodiments, such as Figure 8 As shown, the display substrate further includes a pixel defining layer 5 located between the partition structure 4 and the substrate 1. The pixel defining layer 5 includes a first defining layer 51 and a second defining layer 52 located on the side of the first defining layer 51 away from the substrate 1. The orthographic projection of the partition structure 4 on the substrate 1 covers and extends beyond the orthographic projection of the first defining layer 51 on the substrate 1, and the orthographic projection of the second defining layer 52 on the substrate 1 covers and extends beyond the orthographic projection of the partition structure 4 on the substrate 1.

[0103] Optionally, the material of the first defining layer 51 includes silicon oxide, and the material of the second defining layer 52 includes silicon oxide.

[0104] In this embodiment, the pixel limiting layer 5 is disposed on the side of the partition structure 4 closest to the substrate. Furthermore, the orthographic projection of the second limiting layer 52 in the pixel limiting layer 5 onto the substrate 1 covers and extends beyond the orthographic projection of the partition structure 4 onto the substrate 1. This ensures that the partition structure 4 disconnects the corresponding functional layers at the adjacent positions of the pixel area and the spacing area B. Simultaneously, it reduces the impact of distortion on the light-emitting performance of the display substrate caused by the film layers such as the pixel limiting layer 5, the partition structure 4, and the functional layers on the side of the partition structure 4 furthest from the substrate 1.

[0105] In this embodiment of the disclosure, three light-emitting layers 30, which are stacked and emit red light, green light, and blue light respectively, enable the light-emitting device in each pixel area to emit white light.

[0106] In some embodiments, the material of the substrate 1 includes silicon. For example, the material of the substrate 1 may include monocrystalline silicon.

[0107] Figure 9 This is a schematic cross-sectional view of the display substrate in some other embodiments of this disclosure. In some embodiments, such as Figure 8 and Figure 9 As shown, the display substrate further includes a first electrode 2 located between the pixel limiting layer 5 and the substrate 1. The first electrode 2 corresponds to the filter section 60.

[0108] In one example, such as Figure 8 As shown, the first electrode 2 includes a first conductive layer 21, a second conductive layer 22, a third conductive layer 23 and a fourth conductive layer 24 disposed sequentially along the direction away from the substrate 1.

[0109] Optionally, the fourth conductive layer 24 covers the overall structure formed by stacking the first conductive layer 21, the second conductive layer 22 and the third conductive layer 23, and a portion of the fourth conductive layer 24 is located on the side of the first limiting layer 51 close to the substrate 1.

[0110] Optionally, the first conductive layer 21 is made of titanium. The second conductive layer 22 is made of titanium nitride. The third conductive layer is made of aluminum.

[0111] Optionally, a fifth conductive layer (not shown in the figure) may be disposed between the third conductive layer 23 and the fourth conductive layer 24. Optionally, the material of the fifth conductive layer includes titanium nitride.

[0112] Optionally, a first insulating layer 7 is provided between the substrate 1 and the first electrode 2.

[0113] Optionally, a pixel driving circuit is disposed in the substrate 1. And the first electrode 2 is electrically connected to the pixel driving circuit in the substrate 1 through a via penetrating the first insulating layer 7.

[0114] Optionally, the material of the first insulating layer 7 includes silicon oxide.

[0115] In another example, such as Figure 9 As shown, the first electrode 2 includes a sixth conductive layer 25, a seventh conductive layer 26 and an eighth conductive layer 27 arranged sequentially along the direction away from the substrate 1.

[0116] Optionally, the material of the sixth conductive layer 25 includes titanium. The material of the seventh conductive layer 26 includes aluminum.

[0117] Optionally, a second insulating layer 8 is provided between the seventh conductive layer 26 and the eighth conductive layer 27, and the eighth conductive layer 27 is electrically connected to the seventh conductive layer 26 through a through-hole penetrating the second insulating layer 8.

[0118] Optionally, the material of the second insulating layer 8 includes silicon oxide.

[0119] In this embodiment of the disclosure, the distance from the surface of the first electrode 2 away from the substrate 1 to the substrate 1 can be adjusted by adjusting the thickness of the second insulating layer 8, thereby adjusting the thickness of the light-emitting device in each pixel area.

[0120] In some embodiments, the colors of the filter portions 60 in the plurality of pixel areas include blue, red, and green. It should be noted that the color of the filter portion 60 refers to the color of the light transmitted through the filter portion 60. For example... Figure 9 As shown, the distance D5 between the first electrode 2 corresponding to the blue B filter section 60 and the surface of the substrate 1 is greater than the distance D6 between the first electrode 2 corresponding to the red R filter section 60 and the surface of the substrate 1. The distance D6 between the first electrode 2 corresponding to the red R filter section 60 and the surface of the substrate 1 is greater than the distance D7 between the first electrode 2 corresponding to the green G filter section 60 and the surface of the substrate 1.

[0121] In this embodiment of the present disclosure, by setting different distances from the surface of the first electrode 2, which is away from the substrate 1, to the substrate 1, the thickness of the light-emitting device corresponding to the filter portion 60 of blue B, red R, and green G in the pixel area can be adjusted, thereby narrowing the half-width at half-maximum of the light emitted by the light-emitting device.

[0122] In some embodiments, this disclosure provides a display device including a display substrate as described in any embodiment of this disclosure.

[0123] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A display substrate, characterized by, The display substrate comprises a plurality of pixel regions and a plurality of interval regions between adjacent pixel regions. The plurality of pixel regions comprises a plurality of first pixel regions and a plurality of second pixel regions; the display substrate comprises: a substrate substrate; a plurality of functional layers arranged in layers on one side of the substrate substrate; the plurality of functional layers comprises a plurality of light-emitting layers and a charge generation layer between adjacent light-emitting layers; each functional layer comprises a functional part in the pixel region; the light-emitting color of the plurality of light-emitting layers comprises a plurality of colors; a light filtering part in the pixel region, the light filtering part is located away from the functional part on one side of the substrate substrate; a partition structure in the interval region, the partition structure comprises a first partition layer and a second partition layer located away from the substrate substrate on one side of the first partition layer; the second partition layer comprises a main body part opposite to the first partition layer, and an extension part connected to the main body part, the extension part is located on one side of the main body part towards the pixel region; the color of the light filtering part in the first pixel region is the same as the light-emitting color of one of the light-emitting layers located away from the substrate substrate on one side of the charge generation layer; the color of the light filtering part in the second pixel region is the same as the light-emitting color of one of the light-emitting layers located close to the substrate substrate on one side of the charge generation layer; the width of the extension part adjacent to the first pixel region is smaller than the width of the extension part adjacent to the second pixel region.

2. The display substrate of claim 1, wherein, The plurality of light-emitting layers comprises a first light-emitting layer, a second light-emitting layer and a third light-emitting layer, the first light-emitting layer is located away from the substrate substrate on one side of the charge generation layer; the second light-emitting layer and the third light-emitting layer are located close to the substrate substrate on one side of the charge generation layer and are arranged in order along the direction close to the substrate substrate; the light filtering part in the first pixel region is a first color light filtering part; the light filtering part in the plurality of second pixel regions comprises a plurality of second color light filtering parts and a plurality of third color light filtering parts; wherein the second color light filtering part is the same as the light-emitting color of the second light-emitting layer, and the third color light filtering part is the same as the light-emitting color of the third light-emitting layer; the width of the extension part adjacent to the second pixel region with the second color light filtering part is smaller than or equal to the width of the extension part adjacent to the second pixel region with the third color light filtering part. 3.The display substrate of claim 2, wherein, The plurality of pixel regions are arranged in a plurality of rows, each row comprises a plurality of pixel units, each pixel unit comprises the first pixel region, at least one second pixel region with the second color light filtering part and at least one second pixel region with the third color light filtering part. 4.The display substrate of claim 2, wherein, The light-emitting color of the first light-emitting layer comprises blue; the light-emitting color of the second light-emitting layer comprises green; the light-emitting color of the third light-emitting layer comprises red.

5. The display substrate of claim 1, wherein, The plurality of light-emitting layers comprises a first light-emitting layer, a second light-emitting layer and a third light-emitting layer, the first light-emitting layer and the second light-emitting layer are located away from the substrate substrate on one side of the charge generation layer and are arranged in order along the direction close to the substrate substrate; the third light-emitting layer is located close to the substrate substrate on one side of the charge generation layer; The light filtering part in the plurality of first pixel regions comprises a plurality of first color light filtering parts and a plurality of second color light filtering parts; the light filtering part in the second pixel region is a third color light filtering part; wherein the first color light filtering part is the same as the light emitting color of the first light emitting layer, and the second color light filtering part is the same as the light emitting color of the second light emitting layer; The width of the extension part adjacent to the first pixel region with the first color light filtering part is less than or equal to the width of the extension part adjacent to the first pixel region with the second color light filtering part. 6.The display substrate of claim 5, wherein, The plurality of pixel regions are arranged in a plurality of rows, each row comprising a plurality of pixel units, each pixel unit comprising the second pixel region, at least one first pixel region with the first color light filtering part, and at least one first pixel region with the second color light filtering part. 7.The display substrate of claim 5, wherein, The light emitting color of the first light emitting layer comprises green; the light emitting color of the second light emitting layer comprises red; and the light emitting color of the third light emitting layer comprises blue.

8. The display substrate according to any one of claims 1 to 7, characterized in that, The width of the extension part adjacent to the first pixel region is 0.035-0.05 μm, and the width of the extension part adjacent to the second pixel region is 0.045-0.065 μm.

9. The display substrate according to any one of claims 1 to 7, characterized in that, The surface of the partition structure away from the substrate substrate comprises a first sub-surface and a second sub-surface located on the side of the first sub-surface close to the pixel region, the maximum distance between the first sub-surface and the substrate substrate is less than the maximum distance between the second sub-surface and the substrate substrate. 10.The display substrate of claim 9, wherein, Each layer of the functional layer further comprises a redundant functional part located on the side of the partition structure away from the substrate substrate; The redundant functional part comprises a flat part opposite to the first sub-surface and a convex part opposite to the second sub-surface; The maximum distance between the surface of the convex part away from the substrate substrate and the substrate substrate is greater than the maximum distance between the surface of the flat part away from the substrate substrate and the substrate substrate.

11. The display substrate according to any one of claims 1 to 7, characterized in that, The display substrate further comprises a pixel defining layer between the partition structure and the substrate substrate; The pixel defining layer comprises a first defining layer and a second defining layer located on the side of the first defining layer away from the substrate substrate; The orthographic projection of the partition structure on the substrate substrate covers and exceeds the orthographic projection of the first defining layer on the substrate substrate; The orthographic projection of the second defining layer on the substrate substrate covers and exceeds the orthographic projection of the partition structure on the substrate substrate. 12.The display substrate of claim 11, wherein, The display substrate further comprises: A first electrode between the layer where the pixel defining layer is located and the substrate substrate; the first electrode corresponds to the light filtering part one by one; the color of the light filtering part in the plurality of pixel regions comprises blue, red and green; Wherein, the distance between the surface of the first electrode corresponding to the blue light filtering part away from the substrate substrate and the substrate substrate is greater than the distance between the surface of the first electrode corresponding to the red light filtering part away from the substrate substrate and the substrate substrate; the distance between the surface of the first electrode corresponding to the red light filtering part away from the substrate substrate and the substrate substrate is greater than the distance between the surface of the first electrode corresponding to the green light filtering part away from the substrate substrate and the substrate substrate. 13.The display substrate according to any one of claims 1 to 7, wherein, The material of the substrate includes silicon.

14. A display device comprising: The display substrate includes any one of claims 1 to 13.

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