Display substrate, manufacturing method thereof and display device

Abstract

The embodiment of the invention provides a display substrate, a manufacturing method of the display substrate and a display device. The display substrate comprises a substrate body, a flat layer and an isolation wall. The substrate comprises a display area, a non-display area and an isolation area located between the display area and the non-display area. The flat layer is located on one side, in the first direction, of the display area and extends to one side of the isolation area; the isolation wall is located on one side of the isolation area in the first direction; wherein the thickness of the flat layer located on one side of the display area is larger than that of the flat layer located on one side of the isolation area, and a first preset distance is formed between the flat layer and the isolation wall. According to the embodiment of the invention, the segment difference at the edge of the flat layer and the gap between the flat layer and the isolation wall are utilized to reduce or avoid the contact between the organic residual adhesive and the isolation wall to cause the failure of the isolation wall, thereby facilitating the narrowing of the frame of the display screen or the reduction of the sensing hole under the screen, improving the visual effect of the display screen, and guaranteeing the display function of the display screen.

Description

Technical Field

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

[0002] The technical development direction of display devices depends to a large extent on changes in market demand. Currently, for display devices in the consumer market, users often pursue the overall visual impact and portability of the display screen. For example, in the case of the same display size, mobile terminal users tend to pursue a narrower border of the display screen. Another example is that for the under-screen sensing hole-drilled screens widely used in terminal devices such as mobile phones and tablets, users hope that the holes can be minimized as much as possible to reduce the visual impact of the holes on the overall displayed content and enhance the overall visual effect of the display screen.

[0003] It should be noted that the information distinguishing the invention in the above background art is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0004] Embodiments of the present application provide a display substrate, a manufacturing method thereof, and a display device, aiming to narrow the border of the display screen or reduce the under-screen sensing hole, and improve the visual effect of the display screen.

[0005] In one aspect, embodiments of the present application provide a display substrate, including: a substrate, a planarization layer, and a partition wall;

[0006] The substrate includes: a display area, a non-display area, and an isolation area located between the display area and the non-display area;

[0007] The planarization layer is located on one side of the display area along a first direction and extends to one side of the isolation area;

[0008] The partition wall is located on one side of the isolation area along the first direction;

[0009] Wherein, the thickness of the planarization layer on the side of the display area is greater than the thickness of the planarization layer on the side of the isolation area, and there is a first preset distance between the planarization layer and the partition wall.

[0010] Optionally, a first curved surface facing away from the substrate and facing the partition wall is provided on the planarization layer on the side of the isolation area;

[0011] Wherein, the positive projection of the end of the first curved surface away from the partition wall on the substrate overlaps with the boundary between the isolation area and the display area.

[0012] Optionally, the flat layer includes: a first sub-flat layer, a second sub-flat layer, and a third sub-flat layer that are sequentially stacked along the first direction;

[0013] The second sub-flat layer covers the surface of the first sub-flat layer facing the isolation wall, and the third sub-flat layer covers the surface of the second sub-flat layer facing the isolation wall.

[0014] Optionally, a first curved surface facing away from the substrate and facing the isolation wall is provided on the third sub-flat layer, and a second curved surface facing away from the substrate and facing the first curved surface is provided on the second sub-flat layer;

[0015] Wherein, the distance between one end of the first curved surface close to the isolation wall and the second sub-flat layer, and the distance between one end of the second curved surface close to the isolation wall and the first sub-flat layer are not less than a second preset distance.

[0016] Optionally, the flat layer further includes: a fourth sub-flat layer located on the side of the third sub-flat layer away from the second sub-flat layer, and the fourth sub-flat layer covers the surface of the third sub-flat layer facing the isolation wall;

[0017] A first curved surface facing away from the substrate and facing the isolation wall is provided on the fourth sub-flat layer, a second curved surface facing away from the substrate and facing the first curved surface is provided on the third sub-flat layer, and a third curved surface facing away from the substrate and facing the second curved surface is provided on the fourth sub-flat layer;

[0018] Wherein, the distance between one end of the first curved surface close to the isolation wall and the third sub-flat layer, the distance between one end of the second curved surface close to the isolation wall and the second sub-flat layer, and the distance between one end of the third curved surface close to the isolation wall and the first sub-flat layer are not less than a second preset distance.

[0019] Optionally, the flat layer includes: a first sub-flat layer, a second sub-flat layer, a third sub-flat layer, and a fourth sub-flat layer that are sequentially stacked along the first direction;

[0020] The second sub-flat layer covers the surface of the first sub-flat layer facing the isolation wall, and the fourth sub-flat layer covers the surface of the third sub-flat layer facing the isolation wall;

[0021] A third preset distance exists between the first sub-flat layer and the isolation wall and between the third sub-flat layer and the isolation wall, and a first preset distance exists between the second sub-flat layer and the isolation wall;

[0022] Among them, the third preset distance is greater than the first preset distance.

[0023] Optionally, there is a fourth preset distance between the second sub-flat layer and the isolation wall;

[0024] Among them, the fourth preset distance is less than the third preset distance and greater than the first preset distance.

[0025] Optionally, a first groove is provided on the surface of the substrate facing the first direction;

[0026] The first groove overlaps with the boundary between the display area and the isolation area, and there is the first preset distance between the first groove and the isolation wall;

[0027] Among them, part of the flat layer is embedded in the first groove.

[0028] Optionally, the substrate includes: a gate insulating layer and a base layer located on the side of the gate insulating layer away from the flat layer; the isolation wall includes: a first metal layer and a second metal layer;

[0029] The gate insulating layer includes: a first sub-insulating layer, a second sub-insulating layer, and a third sub-insulating layer stacked in sequence along the first direction;

[0030] The gate insulating layer is provided with a second groove in the isolation area, the second groove has the surface of the first sub-insulating layer facing the first direction as the bottom, and part of the isolation wall is embedded in the second groove;

[0031] The isolation area further includes: a first pad layer located between the gate insulating layer and the base layer;

[0032] Among them, the distance between the orthographic projection of the flat layer on the substrate and the first pad layer is greater than or equal to 0.

[0033] Optionally, the substrate includes: a gate insulating layer and a base layer located on the side of the gate insulating layer away from the flat layer; the isolation wall includes: a second metal layer;

[0034] The gate insulating layer includes: a first sub-insulating layer, a second sub-insulating layer, and a third sub-insulating layer stacked in sequence along the first direction;

[0035] The gate insulating layer is provided with a third groove in the isolation area, the third groove has the surface of the second sub-insulating layer facing the first direction as the bottom, and part of the isolation wall is embedded in the third groove;

[0036] The isolation region further includes: a second pad layer located between the first sub-gate insulating layer and the second sub-insulating layer;

[0037] Wherein, the distance between the orthographic projection of the flat layer on the substrate and the second pad layer is greater than or equal to 0.

[0038] Optionally, the substrate includes: a gate insulating layer and a base layer located on a side of the gate insulating layer away from the flat layer;

[0039] The gate insulating layer includes: a first sub-insulating layer, a second sub-insulating layer, and a third sub-insulating layer stacked in sequence along the first direction;

[0040] The isolation wall is located on a side of the gate insulating layer facing the first direction;

[0041] The isolation region further includes: a second pad layer located between the first sub-gate insulating layer and the second sub-insulating layer, and a third pad layer located between the second sub-gate insulating layer and the third sub-insulating layer;

[0042] Wherein, the distance between the orthographic projection of the flat layer on the substrate and the second pad layer and the third pad layer is greater than or equal to 0.

[0043] Compared with the prior art, the display substrate provided by the embodiments of the present application has the following advantages:

[0044] Through the above embodiments, when the flat layer extends from the display region to the isolation region, a ramp with a gradually narrowing thickness can be formed through the first curved surface, that is, it is a plane in the display region and an inclined curved surface in the isolation region, which helps to realize the convenient production of the flat layer, ensure the thickness step difference between the flat layer in the display region and the flat layer in the isolation region, reduce the organic residual glue diffused to the isolation wall, reduce or avoid display defects such as reliability black spots in the edge region of the display region, and narrow the border of the display region or reduce the under-screen sensing hole, improving the visual effect of the display panel.

[0045] In another aspect, the embodiments of the present application further provide a method for manufacturing a display substrate, including:

[0046] Providing a substrate, the substrate includes: a display region, a non-display region, and an isolation region located between the display region and the non-display region;

[0047] Manufacturing a flat layer on one side of the display region along the first direction, and the flat layer extends to one side of the isolation region;

[0048] Manufacturing an isolation wall on a side of the isolation region facing the first direction;

[0049] Among them, the thickness of the flat layer on one side of the display area is greater than the thickness of the flat layer on one side of the isolation area, and there is a first preset distance between the flat layer and the isolation wall.

[0050] Compared with the prior art, the method for manufacturing a display substrate provided by the embodiments of the present application has the following advantages:

[0051] (1) The display substrate obtained by this manufacturing method has all the advantages of the display substrates in any of the above embodiments.

[0052] (2) This manufacturing method can obtain a flat layer with a thickness step difference by manufacturing sub-flat layers layer by layer, thereby reducing the step difference between the flat layer in the isolation area and the surface of the substrate, reducing or avoiding the contact between the organic residual glue and the isolation wall, and there is no need to make a large change to the original flat layer manufacturing process, which is beneficial to realizing the low-cost and large-scale manufacturing of the display substrate.

[0053] In another aspect, the embodiments of the present application further provide a display device, including the display substrate in any of the above embodiments or the display substrate prepared by using the method in any of the above embodiments.

[0054] In another aspect, the embodiments of the present application further provide an electronic device, and the electronic device includes: a display device; the display device includes the display substrate in any of the above embodiments or the display substrate prepared by using the method in any of the above embodiments.

[0055] The products such as the display device and the electronic device provided by the embodiments of the present application, including the display substrate in the above embodiments, also have all the advantages of the above display substrate. Description of the Drawings

[0056] The drawings are only for reference and illustration, and are not intended to limit the protection scope of the present application. The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0057] Figure 1 Shows a schematic diagram of a functional defect of a display panel in the related art;

[0058] Figure 2 Shows a partial planar structure schematic diagram of a display substrate in an embodiment provided by the present application;

[0059] Figure 3The figure shows a schematic cross-sectional structure diagram of a partial area of a display substrate according to an embodiment provided by the present application;

[0060] Figure 4 The figure shows a schematic cross-sectional structure diagram of a partial area of another display substrate according to an embodiment provided by the present application;

[0061] Figure 5 The figure shows a schematic cross-sectional structure diagram of a partial area of another display substrate according to an embodiment provided by the present application;

[0062] Figure 6 The figure shows a schematic cross-sectional structure diagram of a partial area of another display substrate according to an embodiment provided by the present application;

[0063] Figure 7 The figure shows a schematic cross-sectional structure diagram of a partial area of another display substrate according to an embodiment provided by the present application;

[0064] Figure 8 The figure shows a schematic cross-sectional structure diagram of a partial area of another display substrate according to an embodiment provided by the present application;

[0065] Figure 9 The figure shows a schematic cross-sectional structure diagram of a partial area of another display substrate according to an embodiment provided by the present application;

[0066] Figure 10 The figure shows a schematic cross-sectional structure diagram of a partial area of another display substrate according to an embodiment provided by the present application;

[0067] Figure 11 The figure shows a schematic cross-sectional structure diagram of a partial area of another display substrate according to an embodiment provided by the present application;

[0068] Figure 12 The figure shows a schematic cross-sectional structure diagram of a partial area of another display substrate according to an embodiment provided by the present application;

[0069] Figure 13 The figure shows a flowchart of the steps of a method for manufacturing a display substrate according to an embodiment provided by the present application;

[0070] Figure 14 The figure shows a schematic process structure diagram of a display substrate according to an embodiment provided by the present application. Detailed implementation manners

[0071] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0072] In order to narrow the border of the display screen or reduce the under-screen sensing hole, various means are proposed in the related art to improve the structure of the boundary of the display area. Taking a display screen with an under-screen sensing hole as an example, the traditional punched screen needs to reserve a large space at the boundary of the display area to avoid the adverse impact of the structure of the non-display area on the normal realization of the functions of the display area. The related art proposes to set one or more isolation walls at the boundary between the display area and the punched area to isolate the water vapor path and the electrical path between the display area and the non-display area, realizing regional structural interruption, so as to narrow the space reserved at the boundary of the display area and achieve the visual reduction of the punched hole.

[0073] However, the inventors found that for the device structure with a double layer at the edge of the display area, organic residual glue often appears during the production process of the display panel. The isolation wall uses an undercut structure to cut off the water vapor path and the electrical path, and the diffusion of the organic residual glue will seriously weaken the blocking ability of the isolation wall. Finally, the display abnormality may occur at the boundary of the display area of the display screen due to the failure of the blocking.

[0074] Figure 1 FIG. shows a schematic diagram of the malfunction of a display panel in the related art. As Figure 1 shown, due to the above problems, the problems that occur in the display panel 500 include the appearance of reliability black spots in the area around the under-screen sensing hole, specifically including display defects such as the under-screen sensing hole design of the display panel 500 showing a "gourd-shaped black hole" in the bright screen state.

[0075] In view of the discovery and analysis of the above problems, the embodiments of the present application provide a display substrate, a manufacturing method thereof, and a display device, aiming to narrow the border of the display screen or reduce the under-screen sensing hole, improve the visual effect of the display screen, and at the same time ensure the normal realization of the display function of the display screen.

[0076] Refer to Figure 2 , Figure 2 FIG. shows a partial planar structure schematic diagram of a display substrate in an embodiment provided by the present application. Refer to Figure 3 , Figure 3 FIG. shows a partial cross-sectional structure schematic diagram of a display substrate in an embodiment provided by the present application. As Figure 2 and Figure 3 shown, the embodiments of the present application provide a display substrate, including: a substrate 100, a planarization layer 200, and an isolation wall 300.

[0077] In the embodiments of the present application, the display substrate may be an array circuit substrate of the display panel.

[0078] In some alternative embodiments, the display substrate may serve as an array circuit substrate for an OLED display panel or an LCD display panel.

[0079] The substrate substrate 100 includes: a display area 101, a non-display area 102, and an isolation area 103 located between the display area 101 and the non-display area 102.

[0080] In an alternative example, the substrate substrate 100 may at least include: a gate insulating layer 110 (GI) and a base layer 120.

[0081] In some alternative embodiments, the gate insulating layer 110 may include a plurality of stacked sub-insulating layers. In an alternative example, the gate insulating layer 110 may include an inorganic oxide having insulating properties.

[0082] Exemplarily, the gate insulating layer 110 may include the following materials: SiO2, Si3N4.

[0083] In some alternative embodiments, the base layer 120 may be a flexible insulating layer material. Exemplarily, the base layer 120 may include: a PI material.

[0084] In the embodiments of the present application, the display area 101 may be the area corresponding to the light-emitting display screen in the display substrate, the non-display area 102 may be the area corresponding to the non-light-emitting display in the display substrate, and the isolation area 103 may be the structural protection area between the display area 101 and the non-display area 102.

[0085] In the embodiments of the present application, the non-display area 102 may correspond to the border area of the display substrate or the under-screen sensing punching area.

[0086] Among them, the under-screen sensing punching area may be used to embed a sensor in the middle of the display area 101 of the display screen. Exemplarily, an image sensor, a structured light sensor, a 3D face sensor, etc. may be placed.

[0087] In an alternative example, when the non-display area 102 is the border area of the display substrate, the display area 101 surrounds the non-display area 102.

[0088] In another alternative example, when the non-display area 102 is the under-screen sensing punching area of the display substrate, the non-display area 102 surrounds the display area 101.

[0089] The flat layer 200 is located on one side of the display area 101 along the first direction and extends to one side of the isolation area 103.

[0090] In some alternative embodiments, the material of the flat layer 200 may include: organic polymers and small molecule organic compounds.

[0091] Exemplarily, it may include a mixture of crosslinked polystyrene and epoxy resin obtained by curing with an initiator using styrene as the main monomer component.

[0092] In some alternative embodiments, the flat layer 200 may include a plurality of sub-flat layers 200 arranged in a stacked manner.

[0093] The isolation wall 300 is located on one side of the isolation region 103 along the first direction.

[0094] Among them, the isolation wall 300 can be used to structurally block the display area 101 and the non-display area 102 regionally, which helps to narrow the boundary width of the display area 101, achieve a narrow border design or reduce the under-screen sensing hole, and improve the visual effect of the display panel.

[0095] In some alternative embodiments, the isolation region 103 may include a plurality of isolation walls 300 arranged in parallel, thereby enhancing the structural blocking effect between the display area 101 and the non-display area 102, further narrowing the boundary width of the display area 101, enhancing the narrow border design or further reducing the under-screen sensing hole, and improving the visual effect of the display panel.

[0096] Among them, the thickness of the flat layer 200 on the side of the display area 101 is greater than the thickness of the flat layer 200 on the side of the isolation region 103, and there is a first preset distance between the flat layer 200 and the isolation wall 300.

[0097] In order to maintain the step difference, in some alternative embodiments, the average thickness of the flat layer 200 on the side of the display area 101 may be greater than or equal to twice the average thickness of the flat layer 200 on the side of the isolation region 103.

[0098] In order to maintain a sufficient distance to avoid organic residue glue contacting the isolation wall 300, in some alternative embodiments, the first preset distance may be greater than or equal to twice the thickness of the flat layer 200 on the side of the display area 101.

[0099] Furthermore, the thickness of the flat layer 200 may be about 5 μm, and the first preset distance may be greater than or equal to 11.5 μm.

[0100] Preferably, the first preset distance may be 11.5 μm.

[0101] Figure 4 Shows a partial cross-sectional structural schematic diagram of another display substrate in an embodiment provided by the present application. As Figure 4As shown, specifically, based on the material properties and process characteristics of the flat layer 200 during the manufacturing process, when the flat layer 200 transitions from the display area 101 to the isolation area 103, the surface facing away from the substrate 100 can transition from a flat plane to an inclined curved surface. Exemplarily, it can be the first curved surface 201 facing away from the substrate 100 and towards the isolation wall 300.

[0102] In some alternative embodiments, during the process of the flat layer 200 extending from the display area 101 to the isolation area 103, the thickness gradually decreases.

[0103] Through the above embodiments, after the flat layer 200 extends to the isolation area 103, a height difference is formed with the flat layer 200 in the display area 101, which helps to reduce or avoid the diffusion of organic residual glue to the isolation wall 300 when a narrow border design is carried out between the display area 101 and the non-display area 102, and reduces the ability of the isolation wall 300 to block the water vapor path and the electrical path. Thus, the display substrate in this embodiment can ensure the ability of the isolation wall 300 to block the water vapor path and the electrical path under the condition of a narrow border design, thereby reducing or avoiding display abnormalities at the boundary of the display area 101 of the display substrate. For example, reliability black spots appear in the surrounding area of the under-screen sensor hole, specifically including display defects such as the hole design showing a "gourd-shaped black hole" in the lit screen state. Moreover, there is still a first preset distance between the flat layer 200 in the isolation area 103 and the isolation wall 300, which can further reduce or avoid display defects and achieve a narrow border design or reduce the visual size of the under-screen sensor hole, improving the visual effect of the display panel.

[0104] As Figure 4 shown, the flat layer 200 can often be obtained by means such as deposition or lithography. During the manufacturing process, a stepped multi-layer sub-flat layer 200 process design can be used to make one side of the flat layer 200 facing the isolation wall 300 be in a slope shape. For this reason, in an alternative implementation manner, the present application further provides a display substrate, wherein a first curved surface 201 facing away from the substrate 100 and towards the isolation wall 300 is provided on the flat layer 200 on one side of the isolation area 103.

[0105] In an alternative example, the first curved surface 201 may include: a convex curved surface.

[0106] In another alternative example, the first curved surface 201 may further include: a concave curved surface.

[0107] Among them, the orthographic projection of the end of the first curved surface 201 far from the isolation wall 300 on the substrate 100 overlaps with the boundary between the isolation area 103 and the display area 101.

[0108] Through the above embodiments, when the flat layer 200 extends from the display area 101 to the isolation area 103, a ramp with a gradually narrowing thickness can be formed through the first curved surface 201, that is, the flat layer 200 is a plane in the display area 101 and an inclined curved surface in the isolation area 103, which helps to realize the convenient production of the flat layer 200, ensure the thickness step difference between the flat layer 200 in the display area 101 and the flat layer 200 in the isolation area 103, reduce the organic residual glue diffused to the isolation wall 300, reduce or avoid display defects such as reliability black spots in the edge area of the display area 101, and narrow the border of the display area 101 or reduce the under-screen sensing hole, improving the visual effect of the display panel.

[0109] Figure 5 The partial cross-sectional structural schematic diagram of another display substrate in an embodiment provided by the present application is shown. As Figure 5 shown, the embodiments of the present application can be applied to a display substrate having three sub-flat layers 200. For this purpose, in an alternative embodiment, the present application further provides a display substrate, wherein the flat layer 200 includes: a first sub-flat layer 210, a second sub-flat layer 220, and a third sub-flat layer 230 that are sequentially stacked along a first direction.

[0110] In some alternative embodiments, the thickness of each sub-flat layer 200 such as the first sub-flat layer 210, the second sub-flat layer 220, and the third sub-flat layer 230 can be between 1 μm and 2 μm.

[0111] Preferably, the thickness of the sub-flat layer 200 can be about 1.5 μm.

[0112] In the embodiments of the present application, the description of "about" for a specific value can be expressed as ±10% of the specific data.

[0113] The second sub-flat layer 220 covers the surface of the first sub-flat layer 210 facing the isolation wall 300, and the third sub-flat layer 230 covers the surface of the second sub-flat layer 220 facing the isolation wall 300.

[0114] In the embodiments of the present application, due to the limitation of production cost and process level, each sub-flat layer 200 is usually made with a relatively constant thickness over the entire surface. By covering the side surface of the lower sub-flat layer 200 facing the isolation wall 300 with each stacked sub-flat layer 200, it is convenient for each sub-flat layer 200 to extend from the display area 101 to the isolation area 103 after covering the side surface of the lower sub-flat layer 200, realizing the thickness step difference design between the flat layer 200 in the display area 101 and the flat layer 200 in the isolation area 103.

[0115] Further, embodiments of the present application can also adjust the length of the inclined surface of the tapered thickness design of the flat layer 200 by defining the distance that each sub-flat layer 200 extends from the display area 101 to the isolation area 103. To this end, in an alternative embodiment, the present application further provides a display substrate, wherein a first curved surface 201 facing away from the substrate 100 and facing the isolation wall 300 is provided on the third sub-flat layer 230, and a second curved surface 202 facing away from the substrate 100 and facing the first curved surface 201 is provided on the second sub-flat layer 220.

[0116] Wherein, the distance between the end of the first curved surface 201 close to the isolation wall 300 and the second sub-flat layer 220, and the distance between the end of the second curved surface 202 close to the isolation wall 300 and the first sub-flat layer 210 are not less than a second preset distance.

[0117] In order to make the produced first curved surface 201 more regular and continuous, in some alternative embodiments, the distance between the end of the first curved surface 201 close to the isolation wall 300 and the second sub-flat layer 220, and the distance between the end of the second curved surface 202 close to the isolation wall 300 and the first sub-flat layer 210 can be equal.

[0118] In some alternative embodiments, the second preset distance can be greater than or equal to twice the thickness of each sub-flat layer 200.

[0119] Exemplarily, the thickness of each sub-flat layer 200 can be 1.5 μm, and the second preset distance can be 3 μm.

[0120] Preferably, the distance between the end of the first curved surface 201 close to the isolation wall 300 and the second sub-flat layer 220, and the distance between the end of the second curved surface 202 close to the isolation wall 300 and the first sub-flat layer 210 can be 3 μm.

[0121] Figure 6 Shows a partial cross-sectional structural schematic diagram of another display substrate in an embodiment provided by the present application. As Figure 6 shown, embodiments of the present application can also be applied to a display substrate having 4 sub-flat layers 200. To this end, in an alternative embodiment, the present application further provides a display substrate, wherein the flat layer 200 further includes: a fourth sub-flat layer 240 located on the side of the third sub-flat layer 230 away from the second sub-flat layer 220, and the fourth sub-flat layer 240 covers the surface of the third sub-flat layer 230 facing the isolation wall 300.

[0122] On the fourth sub-flat layer 240, there is a first curved surface 201 facing away from the substrate 100 and towards the isolation wall 300. On the third sub-flat layer 230, there is a second curved surface 202 facing away from the substrate 100 and towards the first curved surface 201. On the fourth sub-flat layer 240, there is a third curved surface 203 facing away from the substrate 100 and towards the second curved surface 202.

[0123] Wherein, the distance between one end of the first curved surface 201 close to the isolation wall 300 and the third sub-flat layer 230, the distance between one end of the second curved surface 202 close to the isolation wall 300 and the second sub-flat layer 220, and the distance between one end of the third curved surface 203 close to the isolation wall 300 and the first sub-flat layer 210 are not less than a second preset distance.

[0124] In order to make the obtained first curved surface 201 more regular and continuous, in some optional embodiments, the distance between one end of the first curved surface 201 close to the isolation wall 300 and the third sub-flat layer 230, the distance between one end of the second curved surface 202 close to the isolation wall 300 and the second sub-flat layer 220, and the distance between one end of the third curved surface 203 close to the isolation wall 300 and the first sub-flat layer 210 can be equal.

[0125] Exemplarily, the second preset distance can be 3μm.

[0126] Preferably, the distance between one end of the first curved surface 201 close to the isolation wall 300 and the third sub-flat layer 230, the distance between one end of the second curved surface 202 close to the isolation wall 300 and the second sub-flat layer 220, and the distance between one end of the third curved surface 203 close to the isolation wall 300 and the first sub-flat layer 210 can be 3μm.

[0127] Figure 7 Shows a schematic partial cross-sectional structure diagram of another display substrate provided by the present application. As Figure 7 shown, the embodiment of the present application also provides a display substrate having 4 sub-flat layers 200. In an optional implementation manner, the present application also provides a display substrate, wherein the flat layer 200 includes: a first sub-flat layer 210, a second sub-flat layer 220, a third sub-flat layer 230, and a fourth sub-flat layer 240 that are sequentially stacked along a first direction.

[0128] The second sub-flat layer 220 covers the surface of the first sub-flat layer 210 facing the isolation wall 300, and the fourth sub-flat layer 240 covers the surface of the third sub-flat layer 230 facing the isolation wall 300.

[0129] There is a third preset distance between the first sub-flat layer 210 and the isolation wall 300, and between the third sub-flat layer 230 and the isolation wall 300, and there is a first preset distance between the second sub-flat layer 220 and the isolation wall 300.

[0130] Among them, the third preset distance is greater than the first preset distance.

[0131] Exemplarily, the first preset distance can be 11.5 μm, and the third preset distance can be 14.5 μm. That is, the distance between the edges of the first sub-flat layer 210 and the third sub-flat layer 230 and the edges of the second sub-flat layer 220 and the fourth sub-flat layer 240 can be 3 μm.

[0132] Through the above embodiments, the sub-flat layers 200 of the flat layer 200 in the present application are not coated layer by layer. Among them, the third sub-flat layer 230 adopts the same design of shrinking inward into the display area 101 as the first sub-flat layer 210, which helps to improve the structural stability of the flat layer 200 at the edge of the display area 101, and the design of a height step difference can also be realized at the boundary between the display area 101 and the isolation area 103.

[0133] Figure 8 Fig. shows a schematic partial cross-sectional structure diagram of another display substrate in an embodiment provided by the present application. As Figure 8 shown, further, in combination with the above embodiments, the present application also considers appropriately shrinking the fourth sub-flat layer 240 into the display area 101, so as to further enhance the height step difference of the flat layer 200 at the boundary between the display area 101 and the isolation area 103, thereby enhancing the protection effect on the isolation area 103. For this purpose, in an optional implementation manner, the present application also provides a display substrate, wherein there is a fourth preset distance between the second sub-flat layer 220 and the isolation wall 300.

[0134] Among them, the fourth preset distance is less than the third preset distance and greater than the first preset distance.

[0135] Exemplarily, the first preset distance can be 11.5 μm, the third preset distance can be 14.5 μm, and the fourth preset distance can be 13 μm. That is, the distance between the edges of the first sub-flat layer 210 and the third sub-flat layer 230 and the edge of the fourth sub-flat layer 240 can be 1.5 μm, and the distance between the edges of the first sub-flat layer 210 and the third sub-flat layer 230 and the edge of the third sub-flat layer 230 can be 3 μm.

[0136] Figure 9 Fig. shows a schematic partial cross-sectional structure diagram of another display substrate in an embodiment provided by the present application. As Figure 9As shown, the embodiment of the present application also considers designing a groove at the junction between the display area 101 and the isolation area 103, so that the flat layer 200 sinks at the groove according to its manufacturing process, reducing the height difference between the flat layer 200 on the isolation area 103 and the surface of the substrate 100, and further reducing or avoiding the diffusion of organic residual glue to the isolation wall 300. For this purpose, in an optional embodiment, the present application further provides a display substrate, wherein a first groove is provided on the surface of the substrate 100 facing the first direction.

[0137] In some optional embodiments, the first groove may have the surface of the base layer 120 facing the first direction as the bottom.

[0138] The first groove overlaps with the junction between the display area 101 and the isolation area 103, and there is a first preset distance between the first groove and the isolation wall 300.

[0139] In some optional embodiments, the first groove may be provided in the gate insulating layer 110. Limited by the thickness of the gate insulating layer 110, the depth of the first groove may be less than the overall thickness of the flat layer 200.

[0140] Wherein, a part of the flat layer 200 is embedded in the first groove.

[0141] Figure 10 Fig. shows a schematic cross-sectional structure of another display substrate in an embodiment provided by the present application. As Figure 10 shown, the embodiment of the present application also considers raising the surface of the isolation area 103, so as to reduce the height difference between the flat layer 200 on the isolation area 103 and the surface of the substrate 100, and further reduce or avoid the diffusion of organic residual glue to the isolation wall 300. For this purpose, in an optional embodiment, the present application further provides a display substrate, wherein the substrate 100 includes: a gate insulating layer 110 and a base layer 120 located on the side of the gate insulating layer 110 away from the flat layer 200.

[0142] The isolation wall 300 includes: a first metal layer 301 and a second metal layer 302.

[0143] In some optional embodiments, the display substrate may be used as an array circuit substrate in a display panel. For this purpose, the display substrate may include a first source-drain metal layer (not shown in the figure) and a second source-drain metal layer (not shown in the figure) in the display area 101 to implement the circuit function of the display substrate. Wherein, the first metal layer 301 may be a metal layer fabricated synchronously with the first source-drain metal layer, and the second metal layer 302 may be a metal layer fabricated synchronously with the second source-drain metal layer.

[0144] The gate insulating layer 110 includes: a first sub-insulating layer, a second sub-insulating layer, and a third sub-insulating layer that are sequentially stacked along a first direction.

[0145] The gate insulating layer 110 is provided with a second groove in the isolation region 103. The second groove has the surface of the first sub-insulating layer facing the first direction as the bottom, and the isolation wall 300 is partially embedded in the second groove.

[0146] The isolation region 103 further includes: a first pad layer 131 located between the gate insulating layer 110 and the base layer 120.

[0147] In some alternative embodiments, the first pad layer 131 may include: a metal shielding layer (BSM).

[0148] Wherein, the distance between the orthographic projection of the planar layer 200 on the substrate 100 and the first pad layer 131 is greater than or equal to 0.

[0149] Figure 11 The partial cross-sectional structural schematic diagram of another display substrate in an embodiment provided by the present application is shown. As Figure 11 shown, the embodiment of the present application also considers using a second pad layer 132 fabricated synchronously with the first source-drain metal layer to raise the surface of the isolation region 103. For this purpose, in an alternative implementation manner, the present application further provides a display substrate, wherein the substrate 100 includes: a gate insulating layer 110 and a base layer 120 located on the side of the gate insulating layer 110 away from the planar layer 200. The isolation wall 300 includes: a first metal layer 301.

[0150] The gate insulating layer 110 includes: a first sub-insulating layer, a second sub-insulating layer, and a third sub-insulating layer that are sequentially stacked along a first direction.

[0151] The gate insulating layer 110 is provided with a third groove in the isolation region 103. The third groove has the surface of the second sub-insulating layer facing the first direction as the bottom, and the isolation wall 300 is partially embedded in the third groove.

[0152] The isolation region 103 further includes: a second pad layer 132 located between the first sub-gate insulating layer 110 and the second sub-insulating layer.

[0153] In some alternative embodiments, the display substrate can be applied as an array circuit substrate to a display panel. For this purpose, the display substrate may include a first source-drain metal layer and a second source-drain metal layer in the display region 101 to implement the circuit function of the display substrate. Among them, the second metal layer 302 may be a metal layer fabricated synchronously with the second source-drain metal layer, and the second pad layer 132 may be a metal layer fabricated synchronously with the first source-drain metal layer.

[0154] Among them, the distance between the orthographic projection of the flat layer 200 on the substrate 100 and the second pad layer 132 is greater than or equal to 0.

[0155] Figure 12 The figure shows a partial cross-sectional structural schematic diagram of another display substrate in an embodiment provided by the present application. As Figure 12 shown, the embodiment of the present application also considers using the second pad layer 132 fabricated synchronously with the first source-drain metal layer and the third pad layer 133 fabricated synchronously with the second source-drain metal layer to simultaneously raise the surface of the isolation region 103. To this end, in an optional implementation manner, the present application also provides a display substrate, where the substrate 100 includes: a gate insulating layer 110 and a base layer 120 located on the side of the gate insulating layer 110 away from the flat layer 200.

[0156] The gate insulating layer 110 includes: a first sub-insulating layer, a second sub-insulating layer, and a third sub-insulating layer stacked in sequence along a first direction.

[0157] The isolation wall 300 is located on the side of the gate insulating layer 110 facing the first direction.

[0158] The isolation region 103 further includes: a second pad layer 132 located between the first sub-gate insulating layer 110 and the second sub-insulating layer, and a third pad layer 133 located between the second sub-gate insulating layer 110 and the third sub-insulating layer.

[0159] In some optional embodiments, the display substrate can be used as an array circuit substrate in a display panel. To this end, the display substrate may include a first source-drain metal layer and a second source-drain metal layer in the display area 101 to implement the circuit function of the display substrate. Among them, the second pad layer 132 may be a metal layer fabricated synchronously with the first source-drain metal layer, and the third pad layer 133 may be a metal layer fabricated synchronously with the second source-drain metal layer.

[0160] Among them, the distance between the orthographic projection of the flat layer 200 on the substrate 100 and the second pad layer 132 and the third pad layer 133 is greater than or equal to 0.

[0161] In still other optional embodiments, in combination with the above embodiments, the first pad layer 131, the second pad layer 132, and the third pad layer 133 can be simultaneously provided to further enhance the heightening effect of the isolation region 103, further reduce the height difference between the surface of the substrate 100 in the isolation region 103 and the flat layer 200, and reduce the influence of organic residual glue on the isolation wall 300.

[0162] It should be noted that, without special instructions, the above embodiments can be combined with each other to form new combinations of implementation manners. Exemplarily, in an alternative implementation manner, the first cushion layer 131, the second cushion layer 132, and the third cushion layer 133 can be used simultaneously to raise the surface of the isolation region 103. Moreover, the thickness step difference of the flat layer 200 itself at the boundary between the display region 101 and the isolation region 103 can be utilized, and the flat layer 200 can be embedded in the first groove to further reduce the height step difference between the boundary between the display region 101 and the isolation region 103 of the flat layer 200 and the surface of the substrate 100 facing the first direction. In this way, the possibility of the organic residual glue contacting the isolation wall 300 can be minimized to the greatest extent from multiple aspects, and there is no need to widen the boundary of the display region 101, thereby realizing the minimization of the narrow border or the under-screen sensing hole of the display screen while ensuring that the normal display function of the display screen is not affected.

[0163] Figure 13 The flowchart of the steps of a manufacturing method of a display substrate in an embodiment provided by the present application is shown. As Figure 13 shown, based on the same inventive concept, the present application further provides a manufacturing method of a display substrate, including:

[0164] Providing a substrate 100, the substrate 100 including: a display region 101, a non-display region 102, and an isolation region 103 located between the display region 101 and the non-display region 102;

[0165] On one side of the display region 101 along the first direction, manufacturing a flat layer 200, and the flat layer 200 extends to one side of the isolation region 103;

[0166] On the side of the isolation region 103 facing the first direction, manufacturing an isolation wall 300;

[0167] Wherein, the thickness of the flat layer 200 on the side of the display region 101 is greater than the thickness of the flat layer 200 on the side of the isolation region 103, and there is a first preset distance between the flat layer 200 and the isolation wall 300.

[0168] In the embodiments of the present application, the thickness step difference of the flat layer 200 itself can be realized by setting the manufacturing processes of the sub-flat layers 200.

[0169] Figure 14 The process structure diagram of a display substrate in an embodiment provided by the present application is shown. As Figure 14As shown, when manufacturing the first sub-flat layer 210, compared with the first sub-flat layer 200 in the related art, the first sub-flat layer 210 can be retracted into the display area 101, that is, the distance between the first sub-flat layer 210 and the partition wall 300 is enlarged. The second sub-flat layer 220 is not retracted compared with the second sub-flat layer 200 in the related art, so that a part of the second sub-flat layer 220 is manufactured on the surface of the substrate 100, and a thickness step difference is naturally formed. Similarly, the third sub-flat layer 230 can also form a thickness step difference in this way, so that the flat layer 200 has a thickness step difference in the display area 101 and the isolation area 103, reducing the possibility of the organic residue contacting the partition wall 300.

[0170] Based on the same inventive concept, an embodiment of the present application further provides a display device, including the display substrate described in any one of the above embodiments or the display substrate prepared by using the method of any one of the above embodiments.

[0171] Based on the same inventive concept, an embodiment of the present application further provides an electronic device, the electronic device includes: a display device; the display device includes the display substrate described in any one of the above embodiments or the display substrate prepared by using the method of any one of the above embodiments.

[0172] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0173] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0174] In the description of this application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows mutual communication; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0175] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0176] In this application, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or terminal device comprising a series of elements includes not only those elements but also other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the element.

[0177] In the description of this application, unless otherwise specified, the meaning of "a plurality of" refers to two or more.

[0178] It should be noted that in the embodiments of this application, words such as "exemplarily" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplarily" or "for example" is intended to present relevant concepts in a specific manner.

[0179] In the description of this application, unless otherwise specified, the meaning of "the same layer" means that two or more defined objects are in the same layer position in the stacking relationship, or, in the thickness direction of the stacking relationship, are all or partially in the same horizontal plane.

[0180] In this text, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0181] Finally, it should also be noted that specific examples are used in this text to elaborate on the principles and implementation manners of this application. The description of the above embodiments is only used to help understand the technical solutions and their core ideas of this application. Although the preferred embodiments of the embodiments of this application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of this application.

Claims

1. A display substrate, characterized in that, it includes: a substrate substrate, a planarization layer, and a partition wall; the substrate substrate includes: a display area, a non-display area, and an isolation area located between the display area and the non-display area; the planarization layer is located on one side of the display area along a first direction and extends to one side of the isolation area; the partition wall is located on one side of the isolation area along the first direction; wherein, the thickness of the planarization layer on the side of the display area is greater than the thickness of the planarization layer on the side of the isolation area, and there is a first preset distance between the planarization layer and the partition wall.

2. The display substrate according to claim 1, characterized in that, a first curved surface facing away from the substrate substrate and facing the partition wall is provided on the planarization layer on the side of the isolation area; wherein, the orthographic projection of the end of the first curved surface far from the partition wall on the substrate substrate overlaps with the boundary between the isolation area and the display area.

3. The display substrate according to claim 1, characterized in that, the planarization layer includes: a first sub-planarization layer, a second sub-planarization layer, and a third sub-planarization layer stacked in sequence along the first direction; the second sub-planarization layer covers the surface of the first sub-planarization layer facing the partition wall, and the third sub-planarization layer covers the surface of the second sub-planarization layer facing the partition wall.

4. The display substrate according to claim 3, characterized in that, a first curved surface facing away from the substrate substrate and facing the partition wall is provided on the third sub-planarization layer, and a second curved surface facing away from the substrate substrate and facing the first curved surface is provided on the second sub-planarization layer; wherein, the distance between the end of the first curved surface close to the partition wall and the second sub-planarization layer, and the distance between the end of the second curved surface close to the partition wall and the first sub-planarization layer are not less than a second preset distance.

5. The display substrate according to claim 3, characterized in that, the planarization layer further includes: a fourth sub-planarization layer located on the side of the third sub-planarization layer away from the second sub-planarization layer, and the fourth sub-planarization layer covers the surface of the third sub-planarization layer facing the partition wall; a first curved surface facing away from the substrate substrate and facing the partition wall is provided on the fourth sub-planarization layer, a second curved surface facing away from the substrate substrate and facing the first curved surface is provided on the third sub-planarization layer, and a third curved surface facing away from the substrate substrate and facing the second curved surface is provided on the fourth sub-planarization layer; wherein, the distance between the end of the first curved surface close to the partition wall and the third sub-planarization layer, the distance between the end of the second curved surface close to the partition wall and the second sub-planarization layer, and the distance between the end of the third curved surface close to the partition wall and the first sub-planarization layer are not less than a second preset distance.

6. The display substrate according to claim 1, characterized in that, the planarization layer includes: a first sub-planarization layer, a second sub-planarization layer, a third sub-planarization layer, and a fourth sub-planarization layer stacked in sequence along the first direction; The second sub-flat layer covers the surface of the first sub-flat layer facing the isolation wall, and the fourth sub-flat layer covers the surface of the third sub-flat layer facing the isolation wall; There is a third preset distance between the first sub-flat layer and the isolation wall and between the third sub-flat layer and the isolation wall, and there is the first preset distance between the second sub-flat layer and the isolation wall; Wherein, the third preset distance is greater than the first preset distance.

7. The display substrate according to claim 6, characterized in that, There is a fourth preset distance between the second sub-flat layer and the isolation wall; Wherein, the fourth preset distance is less than the third preset distance and greater than the first preset distance.

8. The display substrate according to claim 1, characterized in that, A first groove is provided on the surface of the substrate substrate facing the first direction; The first groove overlaps with the boundary between the display area and the isolation area, and there is the first preset distance between the first groove and the isolation wall; Wherein, the flat layer is partially embedded in the first groove.

9. The display substrate according to claim 1, characterized in that, The substrate substrate includes: a gate insulating layer and a base layer located on a side of the gate insulating layer away from the flat layer; the isolation wall includes: a first metal layer and a second metal layer; The gate insulating layer includes: a first sub-insulating layer, a second sub-insulating layer, and a third sub-insulating layer that are sequentially stacked along the first direction; The gate insulating layer is provided with a second groove in the isolation area, the second groove has the surface of the first sub-insulating layer facing the first direction as the bottom, and the isolation wall is partially embedded in the second groove; The isolation area further includes: a first pad layer located between the gate insulating layer and the base layer; Wherein, the distance between the orthographic projection of the flat layer on the substrate substrate and the first pad layer is greater than or equal to 0.

10. The display substrate according to claim 1, characterized in that, The substrate substrate includes: a gate insulating layer and a base layer located on a side of the gate insulating layer away from the flat layer; the isolation wall includes: a second metal layer; The gate insulating layer includes: a first sub-insulating layer, a second sub-insulating layer, and a third sub-insulating layer that are sequentially stacked along the first direction; The gate insulating layer is provided with a third groove in the isolation area, the third groove has the surface of the second sub-insulating layer facing the first direction as the bottom, and the isolation wall is partially embedded in the third groove; The isolation area further includes: a second pad layer located between the first sub-gate insulating layer and the second sub-insulating layer; Wherein, the distance between the orthographic projection of the flat layer on the substrate substrate and the second pad layer is greater than or equal to 0.

11. The display substrate according to claim 1, characterized in that, The substrate substrate includes: a gate insulating layer and a base layer located on a side of the gate insulating layer away from the flat layer; The gate insulating layer includes: a first sub-insulating layer, a second sub-insulating layer, and a third sub-insulating layer that are sequentially stacked along the first direction; The isolation wall is located on a side of the gate insulating layer facing the first direction; The isolation region further includes: a second interlayer dielectric layer located between the first sub-gate insulating layer and the second sub-insulating layer, and a third interlayer dielectric layer located between the second sub-gate insulating layer and the third sub-insulating layer; Wherein, a distance between a positive projection of the planar layer on the substrate and the second interlayer dielectric layer and the third interlayer dielectric layer is greater than or equal to 0.

12. A method for manufacturing a display substrate, Characterized in that, Comprising: Providing a substrate, the substrate includes: a display region, a non-display region, and an isolation region located between the display region and the non-display region; On a side of the display region along the first direction, manufacturing a planar layer, and the planar layer extends to a side of the isolation region; On a side of the isolation region facing the first direction, manufacturing an isolation wall; Wherein, a thickness of the planar layer on a side of the display region is greater than a thickness of the planar layer on a side of the isolation region, and there is a first preset distance between the planar layer and the isolation wall.

13. A display device, Characterized in that, Comprising the display substrate according to any one of claims 1 to 11 or a display substrate manufactured by using the manufacturing method of the display substrate according to claim 12.

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