Display panel, display substrate and manufacturing method thereof

Abstract

The present disclosure provides a display panel, a display substrate and a method for manufacturing the same. The display substrate comprises: a base substrate, comprising a first region, the first region corresponding to the display region of the display substrate, at least one side of the first region being provided with a liquid-repellent region; a pixel defining layer, provided on the base substrate and at least partially located in the first region, the pixel defining layer comprising a plurality of first pixel defining strips extending along a first direction and a plurality of second pixel defining strips extending along a second direction, the first direction intersecting with the second direction; the surface of the first pixel defining strip facing away from the base substrate is located on the side of the surface of the second pixel defining strip facing away from the base substrate. The present disclosure can improve the service life of the device.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display panel, a display substrate and a method for preparing the same. Background Art

[0002] OLED (Organic Light Emitting Diode) display devices have become a highly competitive type of display device with good development prospects due to their advantages such as all-solid-state structure, self-luminescence, fast response speed, high brightness, full viewing angle, and flexible display. In order to further meet people's requirements for visual experience, special-shaped OLED display screens such as round screens and notch screens have attracted more and more attention. However, existing special-shaped display screens are prone to water and oxygen corrosion, which reduces the service life of the device. Summary of the invention

[0003] The purpose of the present disclosure is to provide a display panel, a display substrate and a method for manufacturing the same, which can increase the service life of the device.

[0004] According to one aspect of the present disclosure, there is provided a display substrate, comprising:

[0005] A base substrate, comprising a first area, the first area corresponds to a display area of ​​the display substrate, and at least one side of the first area is provided with a liquid-repellent area;

[0006] A pixel defining layer is disposed on the base substrate and is at least partially located in the first area. The pixel defining layer includes a plurality of first pixel defining strips extending along a first direction and a plurality of second pixel defining strips extending along a second direction, wherein the first direction intersects with the second direction. A surface of the first pixel defining strip facing away from the base substrate is located on a side of the surface of the second pixel defining strip facing away from the base substrate.

[0007] Furthermore, the liquid-repellent area at least includes a first liquid-repellent area, an inner boundary of the first liquid-repellent area coincides with an outer boundary of the first region, and the second pixel defining strip is provided at the boundary between the first liquid-repellent area and the first region.

[0008] Furthermore, there are a plurality of the lyophobic regions, and the plurality of the lyophobic regions are arranged at intervals.

[0009] Furthermore, the substrate further comprises a plurality of lyophilic regions, and the lyophilic regions and the lyophobic regions are arranged alternately.

[0010] Furthermore, the base substrate further includes a lyophilic region spaced apart from the first region.

[0011] Furthermore, there are a plurality of the lyophilic regions, and a plurality of the lyophilic regions are spaced apart and distributed in a direction away from the first region.

[0012] Furthermore, the display substrate further comprises:

[0013] Two isolation walls arranged opposite to each other are arranged on the base substrate and are located outside the first area;

[0014] The blocking structure is disposed on the substrate, outside the first area, and between two adjacent isolation walls.

[0015] Furthermore, the isolation wall extends integrally from the first pixel defining strip.

[0016] Further, the isolation wall is parallel to the first direction, and the blocking structure includes a plurality of blocking bars, and the plurality of blocking bars include:

[0017] A plurality of first barrier bars are arranged in parallel and at intervals and distributed along the first direction, and an extension direction of the first barrier bars intersects with the first direction;

[0018] A plurality of second barrier bars are arranged in parallel and at intervals and distributed along the first direction. The extension direction of the second barrier bars intersects with the first direction. The first barrier bars are arranged alternately with the second barrier bars. Any of the first barrier bars is arranged at intervals with any of the second barrier bars.

[0019] Furthermore, the blocking bar is spaced apart from the first region, the number of the lyophobic regions is multiple, and the substrate further comprises multiple lyophilic regions; between two adjacent isolation walls, the lyophobic regions and the lyophilic regions are alternately arranged along the first direction, and a blocking bar is provided at the junction of adjacent lyophobic regions and the lyophilic regions.

[0020] Furthermore, the barrier strip includes a first barrier layer and a second barrier layer which are stacked, the first barrier layer being disposed on one side of the base substrate, the second barrier layer being located on a side of the first barrier layer away from the base substrate, the width of the first barrier layer being smaller than the width of the second barrier layer, and the orthographic projection of the first barrier layer on the base substrate being located within the orthographic projection region of the second barrier layer on the base substrate.

[0021] Furthermore, the barrier strip further comprises a third barrier layer, wherein the third barrier layer is disposed on one side of the base substrate, the first barrier layer is located on a side of the third barrier layer away from the base substrate, the width of the first barrier layer is smaller than the width of the third barrier layer, and the orthographic projection of the first barrier layer on the base substrate is located within the orthographic projection region of the third barrier layer on the base substrate.

[0022] Furthermore, the display substrate further comprises:

[0023] The crack isolation structure is provided on the base substrate and is located on a side of the barrier structure away from the first region. The crack isolation structure is an isolation column or an isolation groove.

[0024] According to one aspect of the present disclosure, a method for preparing a display substrate is provided, wherein the method is used to prepare the above-mentioned display substrate, and the method comprises:

[0025] forming an organic light-emitting material layer by an inkjet printing process;

[0026] Cutting is performed along a preset track to form a display substrate having a preset shape, wherein the preset track is located on a side of an inner boundary of the liquid-repellent area away from the first area.

[0027] According to one aspect of the present disclosure, a display panel is provided, comprising the above-mentioned display substrate.

[0028] The display panel, display substrate and preparation method thereof disclosed in the present invention, during the process of inkjet printing on the display substrate disclosed in the present invention, ink containing organic light-emitting material will flow from the first area to outside the first area. Since at least one side of the first area is provided with a liquid-repellent area, the ink is not easy to gather in the liquid-repellent area, so that it is difficult to form an organic light-emitting material layer in the liquid-repellent area, and then the organic light-emitting material layer formed outside the first area is disconnected from the organic light-emitting material layer formed in the first area in the liquid-repellent area; the display substrate after inkjet printing is cut so that the cutting track is located outside the inner boundary of the liquid-repellent area. Since the organic light-emitting material layer formed outside the first area is disconnected from the organic light-emitting material layer formed in the first area in the liquid-repellent area, it is difficult for water and oxygen to invade the organic light-emitting material layer in the first area from the cutting section, thereby reducing water and oxygen erosion, improving the service life and yield of the device, and improving the packaging characteristics of special-shaped packaging products. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of a display substrate according to an embodiment of the present disclosure.

[0030] Figure 2 is a schematic diagram of a substrate according to an embodiment of the present disclosure.

[0031] Figure 3 is a partial schematic diagram of a display substrate according to an embodiment of the present disclosure.

[0032] Figure 4 is another partial schematic diagram of a display substrate according to an embodiment of the present disclosure.

[0033] Figure 5 is another partial schematic diagram of a display substrate according to an embodiment of the present disclosure.

[0034] Figure 6 yes Figure 5 Schematic diagram of line S1 in the structure shown.

[0035] Figure 7 yes Figure 3 AA cross-sectional view of the barrier strip in the structure shown.

[0036] Explanation of the figure numbers: 1. substrate; 101. first area; 102. liquid-repellent area; 103. liquid-philic area; 2. pixel defining layer; 201. first pixel defining strip; 202. second pixel defining strip; 3. blocking strip; 301. first blocking strip; 302. second blocking strip; 4. first blocking layer; 5. second blocking layer; 6. third blocking layer; 7. isolation wall; 8. sub-pixel area. DETAILED DESCRIPTION

[0037] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0038] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the present disclosure specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limit, but indicate that there is at least one. "Multiple" or "several" means two and more than two. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. As used in this disclosure and the appended claims, the singular forms "a", "an", "said", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

[0039] In the related art, the special-shaped OLED display substrate is a unique display substrate, and its display area is a non-rectangular area such as a circle or a curve. However, the special-shaped screens currently produced by the production line using inkjet printing technology are all rectangular film-forming processes, that is, the front of the display substrate will be printed, including the area of ​​the display substrate corresponding to the display area of ​​the display substrate and the area of ​​the display substrate corresponding to the non-display area of ​​the display substrate. When forming a special-shaped screen, it is necessary to cut the display substrate after inkjet printing to form the special-shaped screen. The cut section of the special-shaped screen usually has an exposed organic light-emitting material layer, and water vapor and oxygen will invade from these organic light-emitting material layers and extend to the display area, causing the organic light-emitting material in the display area to be corroded and defective.

[0040] The present disclosure provides a display substrate. The display substrate may include a display area and a non-display area surrounding the display area. The display area may be rectangular or square. Of course, the display area may also be circular, trapezoidal, heart-shaped or other special shapes. Figure 1 and Figure 2 As shown, the display substrate may include a base substrate 1 and a pixel defining layer 2, wherein:

[0041] The base substrate 1 includes a first area 101, the first area 101 corresponds to the display area of ​​the display substrate, and at least one side of the first area 101 is provided with a liquid-repellent area 102. The pixel defining layer 2 is provided on the base substrate 1, and at least part of the pixel defining layer 2 is located in the first area 101. The pixel defining layer 2 includes a plurality of first pixel defining strips 201 extending along a first direction and a plurality of second pixel defining strips 202 extending along a second direction. The first direction intersects with the second direction. The surface of the first pixel defining strip 201 facing away from the base substrate 1 is located on the side away from the base substrate 1 of the surface of the second pixel defining strip 202 facing away from the base substrate 1.

[0042] In the display substrate of the embodiment of the present disclosure, during the inkjet printing process, the ink containing the organic light-emitting material will flow from the first area 101 to outside the first area 101. Since the liquid-repellent area 102 is provided on at least one side of the first area 101, the ink is not easy to gather in the liquid-repellent area 102, so that it is difficult to form an organic light-emitting material layer in the liquid-repellent area 102, and then the organic light-emitting material layer formed outside the first area 101 is disconnected from the organic light-emitting material layer formed in the first area 101 in the liquid-repellent area 102; the display substrate after inkjet printing is cut so that the cutting track is located outside the inner boundary of the liquid-repellent area 102. Since the organic light-emitting material layer formed outside the first area 101 is disconnected from the organic light-emitting material layer formed in the first area 101 in the liquid-repellent area 102, it is difficult for water and oxygen to invade the organic light-emitting material layer in the first area 101 from the cut section, thereby improving the service life and yield of the device, and at the same time improving the packaging characteristics of the special-shaped packaging product.

[0043] The following is a detailed description of each part of the display substrate according to the embodiment of the present disclosure:

[0044] The substrate substrate 1 may include a substrate and a driving circuit layer. The substrate may be a rigid substrate. Among them, the rigid substrate may be a glass substrate or a PMMA (Polymethyl methacrylate) substrate, etc. Of course, the substrate may also be a flexible substrate. Among them, the flexible substrate may be a PET (Polyethyleneterephthalate) substrate, a PEN (Polyethylene naphthalate twoformic acid glycol ester) substrate or a PI (Polyimide) substrate. The driving circuit layer may be disposed on the substrate. The driving circuit layer may include a plurality of driving transistors. The driving transistor may be a thin film transistor, but the embodiments of the present disclosure are not limited thereto. The thin film transistor may be a top gate thin film transistor, and of course, the thin film transistor may also be a bottom gate thin film transistor. Taking the thin film transistor as a top gate thin film transistor as an example, the driving circuit layer may include an active layer, a gate insulating layer, a gate electrode, an interlayer insulating layer, a source electrode and a drain electrode. The active layer may be disposed on the substrate. The gate insulating layer may be disposed on the substrate and cover the active layer. The gate electrode may be disposed on the side of the gate insulating layer away from the substrate. The interlayer insulating layer may be disposed on the gate insulating layer and cover the gate electrode. The source and drain may be disposed on the interlayer insulating layer and connected to the active layer via vias passing through the interlayer insulating layer and the gate insulating layer. In addition, the substrate 1 may further include a planarization layer. The planarization layer may be disposed on the surface of the driving circuit layer facing away from the substrate and cover the source and drain of the driving transistor.

[0045] like Figure 2As shown, the base substrate 1 includes a first area 101. The first area 101 corresponds to the display area of ​​the display substrate, that is, the first area 101 can be rectangular, square, or circular, trapezoidal, heart-shaped or other special shapes. The base substrate 1 also includes a liquid-repellent area 102. The liquid-repellent area 102 can be located in the area of ​​the base substrate 1 corresponding to the non-display area of ​​the display substrate. The liquid-repellent area 102 can be annular and surround the first area 101. The liquid-repellent area 102 includes at least a first liquid-repellent area, and the inner boundary of the first liquid-repellent area can coincide with the outer boundary of the first area 101. The number of the liquid-repellent areas 102 can be one or more. Taking the number of the liquid-repellent areas 102 as one as an example, that is, the liquid-repellent area 102 only includes the first liquid-repellent area, and the inner boundary of the liquid-repellent area 102 can coincide with the outer boundary of the first area 101, so that the cutting track of the display substrate can be closer to the boundary of the first area 101, thereby achieving the effect of a narrow frame. Taking the case where there are multiple lyophobic areas 102 as an example, the multiple lyophobic areas 102 are arranged at intervals so that the multiple lyophobic areas 102 surround the first area 101 in sequence, and the inner boundary of the lyophobic area 102 located inside the multiple lyophobic areas 102 coincides with the outer boundary of the first area 101, that is, the lyophobic area 102 located inside the multiple lyophobic areas 102 is the above-mentioned first lyophobic area. The lyophobic area 102 located inside the multiple lyophobic areas 102 refers to the lyophobic area 102 with the smallest distance from the first area 101 among the multiple lyophobic areas 102. The above-mentioned second pixel defining strip 202 may be provided at the junction of the lyophobic area 102 and the first area 101.

[0046] like Figure 2As shown, the base substrate 1 may further include a lyophilic area 103. The lyophilic area 103 may be spaced apart from the first area 101, that is, the lyophilic area 103 is also located in the area of ​​the base substrate 1 corresponding to the non-display area of ​​the display substrate. This arrangement allows the ink that overflows outside the first area 101 during inkjet printing to flow from the lyophobic area 102 to the lyophilic area 103, so as to gather in the lyophilic area 103. The number of the lyophilic areas 103 may be one or more. The shape of the lyophilic area 103 may be annular and surround the first area 101. Of course, the lyophilic area 103 may also be in other shapes such as a block. Taking the number of lyophilic areas 103 as an example, the multiple lyophilic areas 103 may be spaced apart in a direction away from the first area 101. Among them, two adjacent lyophilic areas 103 in the multiple lyophilic areas 103 may be separated by the lyophobic area 102. In one embodiment of the present disclosure, the number of the lyophilic region 103 and the lyophobic region 102 are both one, and both are in annular shape, the lyophilic region 103 surrounds the first region 101, and is located on the side of the lyophobic region 102 away from the first region 101, that is, the lyophilic region 103 surrounds the lyophobic region 102. In another embodiment of the present disclosure, the number of the lyophilic region 103 and the lyophobic region 102 are both multiple, and both are in annular shape, the multiple lyophilic regions 103 surround the first region 101, and the lyophilic regions 103 and the lyophobic regions 102 are staggered.

[0047] The base substrate 1 of the present disclosure may include a modified layer disposed on the planarization layer. The modified layer may be located in an area of ​​the base substrate 1 corresponding to the non-display area of ​​the display substrate. The modified layer includes a lyophilic portion and a lyophobic portion to form the above-mentioned lyophilic area 103 and lyophobic area 102. The material of the lyophilic portion of the modified layer is polyimide, and the material of the lyophobic portion of the modified layer is fluorinated polyimide. In other embodiments of the present disclosure, the present disclosure may also perform doping modification on the above-mentioned planarization layer so that the planarization layer forms the above-mentioned lyophobic area 102 and lyophilic area 103.

[0048] exist Figure 3 and Figure 4 In the figure, the first region 101 is rectangular, line S1 represents a boundary of the first region 101 in the first direction, line S2 represents a boundary of the base substrate 1, and the area between line S1 and line S2 is an area of ​​the base substrate 1 outside the first region 101. Figure 5 and Figure 6 In the example, the first region 101 is Figure 2 The circle shown in FIG. 1 , line S1 represents Figure 2 The left boundary of the first area 101; Figure 5 and Figure 6 The line S1 in the figure is step-shaped because Figure 5Only six columns of pixels are shown, and their size is extremely small. The pixel defining layer 2 includes a first pixel defining strip 201 and a second pixel defining strip 202. The number of the first pixel defining strips 201 is multiple, and they extend along the first direction and are spaced apart along the second direction, that is, the multiple first pixel defining strips 201 are arranged in parallel, wherein the area between any two adjacent first pixel defining strips 201 forms a pixel area. The pixel area may include a red pixel area, a green pixel area, and a blue pixel area. The first direction is the X direction, and the second direction is the Y direction. The first direction intersects with the second direction, and further, the first direction may be perpendicular to the second direction. The number of the second pixel defining strips 202 is multiple, and they extend along the second direction and are spaced apart along the first direction, that is, the multiple second pixel defining strips 202 are arranged in parallel. Any first pixel defining strip 201 intersects with multiple second pixel defining strips 202, so that the pixel area between two adjacent first pixel defining strips 201 is divided into multiple sub-pixel areas by the second pixel defining strip 202, and the sub-pixels formed by the multiple sub-pixel areas have the same color. In addition, the surface of the first pixel defining strip 201 facing away from the substrate 1 is located on the side of the surface of the second pixel defining strip 202 facing away from the substrate 1, that is, the size of the first pixel defining strip 201 in the direction perpendicular to the substrate 1 is greater than the size of the second pixel defining strip 202 in the direction perpendicular to the substrate 1. In the inkjet printing process, the ink containing the organic light-emitting material will flow in the pixel area to form an organic light-emitting material layer in each sub-pixel area, and the first pixel defining strip 201 with a larger size can prevent the ink from climbing from one pixel area to another pixel area.

[0049] like Figure 3 , Figure 4 as well as Figure 5As shown, the display substrate of the present disclosure may also include a blocking structure and a separation wall 7. The separation wall 7 may be provided on the base substrate 1 and located outside the first area 101. The separation wall 7 may be in a strip-shaped structure and parallel to the first direction. The number of the separation walls 7 may be two, and the two separation walls 7 are arranged opposite to each other. Of course, the number of the separation walls 7 may also be three, four or more, and the plurality of separation walls 7 are distributed at intervals and arranged in parallel. The blocking structure may be provided on the base substrate 1 and located outside the first area 101, and between two adjacent separation walls 7, so as to block the ink flowing outside the first area 101. The number of the blocking structures may be multiple, and a blocking structure may be provided between any two adjacent separation walls 7. Among them, the separation wall 7 may extend integrally from the first pixel defining strip 201, that is, the first pixel defining strip 201 extends out of the first area 101 and extends to the above-mentioned lyophilic area 103 and lyophobic area 102. Part of the second pixel defining strip 202 may also be located outside the first area 101 . Of course, the second pixel defining strip 202 may not be provided in the area of ​​the base substrate 1 outside the first area 101 .

[0050] like Figure 3 , Figure 4 as well as Figure 5 As shown, each barrier structure may include a plurality of barrier bars 3. The extending direction of the barrier bars 3 may be parallel to the substrate 1. Each barrier bar 3 is spaced apart from the first region 101 of the substrate 1. The plurality of barrier bars 3 may include a plurality of first barrier bars 301 and a plurality of second barrier bars 302. The plurality of first barrier bars 301 may be arranged in parallel and spaced apart, and distributed along a first direction, and the extending direction of the first barrier bars 301 intersects with the first direction. The plurality of second barrier bars 302 may be arranged in parallel and spaced apart, and distributed along the first direction, and the extending direction of the second barrier bars 302 may intersect with the first direction. The first barrier bars 301 may be staggered with the second barrier bars 302, and any first barrier bar 301 may be spaced apart from any second barrier bar 302. Taking the case where the number of the lyophobic regions 102 and the lyophilic regions 103 of the present disclosure is multiple as an example, between two adjacent isolation walls 7, the lyophobic regions 102 and the lyophilic regions 103 are alternately arranged along the first direction, and a barrier strip 3 is provided at the junction of any adjacent lyophobic regions 102 and lyophilic regions 103. Figure 2 and Figure 5 As shown, when the first area 101 is circular, a lyophobic area 102 and a lyophilic area 103 are provided on the upper side and / or lower side of the leftmost sub-pixel area 8 of the first area 101. The present disclosure does not limit the lyophilic and lyophilic properties of the left side of the sub-pixel area 8.

[0051] like Figure 3 , Figure 4 as well as Figure 5As shown, for two adjacent isolation walls 7, the first end of the first barrier bar 301 contacts one isolation wall 7, the second end of the first barrier bar 301 is spaced apart from the other isolation wall 7, and the first end of the first barrier bar 301 is located between the second end of the first barrier bar 301 and the first area 101; the isolation wall 7 spaced apart from the second end of the first barrier bar 301 contacts the first end of the second barrier bar 302, the isolation wall 7 contacting the first end of the first barrier bar 301 is spaced apart from the second end of the second barrier bar 302, and the first end of the second barrier bar 302 is located between the second end of the second barrier bar 302 and the first area 101.

[0052] In addition, if Figure 7 As shown, the barrier strip 3 may include a first barrier layer 4 and a second barrier layer 5 which are stacked. The first barrier layer 4 may be provided on the substrate 1, and the second barrier layer 5 may be located on the side of the first barrier layer 4 away from the substrate 1. The width of the first barrier layer 4 is smaller than the width of the second barrier layer 5, and the orthographic projection of the first barrier layer 4 on the substrate 1 is located within the orthographic projection area of ​​the second barrier layer 5 on the substrate 1. It can be seen that the cross section of the barrier strip 3 having the first barrier layer 4 and the second barrier layer 5 may be a "T"-shaped structure. Further, the barrier strip 3 may also include a third barrier layer 6. The third barrier layer 6 may be provided on the substrate 1, and the first barrier layer 4 may be located on the side of the third barrier layer 6 away from the substrate 1. The width of the first barrier layer 4 is smaller than the width of the third barrier layer 6, and the orthographic projection of the first barrier layer 4 on the substrate 1 is located within the orthographic projection area of ​​the third barrier layer 6 on the substrate 1. It can be seen that the cross section of the barrier strip 3 having the first barrier layer 4, the second barrier layer 5 and the third barrier layer 6 may be an "I"-shaped structure. In addition, the display substrate of the present disclosure may further include a crack isolation structure. The crack isolation structure may be provided on the base substrate and located on the side of the blocking structure away from the first region. The crack isolation structure may be an isolation column or an isolation groove to prevent the crack from extending across the crack isolation structure. The display substrate of the present disclosure may further include a retaining wall. During the process of thin film encapsulation (TFE) of the display substrate, the retaining wall can block the organic material in the encapsulation layer. The retaining wall may be located between the above-mentioned crack isolation structure and the blocking structure.

[0053] The present disclosure also provides a method for preparing a display substrate, which is used to prepare the display substrate described in any of the above embodiments. The method for preparing the display substrate may include: forming an organic light-emitting material layer by an inkjet printing process; cutting along a preset track to form a display substrate having a preset shape, wherein the preset track is located on a side of the inner boundary of the liquid-repellent region away from the first region.

[0054] The embodiment of the present disclosure also provides a display panel. The display panel includes the display substrate described in any of the above embodiments. The display panel can be an OLED display panel, which can be used in mobile phones, tablet computers, televisions, etc.

[0055] The display panel, the method for preparing the display substrate, and the display substrate provided in the embodiments of the present disclosure belong to the same inventive concept, and the descriptions of the relevant details and beneficial effects can be referred to each other and will not be repeated here.

[0056] The above is only a preferred embodiment of the present disclosure and does not limit the present disclosure in any form. Although the present disclosure has been disclosed as a preferred embodiment as above, it is not used to limit the present disclosure. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present disclosure. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present disclosure without departing from the content of the technical solution of the present disclosure are still within the scope of the technical solution of the present disclosure.

Claims

1. A display substrate, characterized in that: include: A base substrate, comprising a first area, the first area corresponds to the display area of ​​the display substrate, at least one side of the first area is provided with a liquid-repellent area; the liquid-repellent area at least comprises a first liquid-repellent area, the inner boundary of the first liquid-repellent area coincides with the outer boundary of the first area, and a second pixel defining strip is provided at the junction of the first liquid-repellent area and the first area; the number of the liquid-repellent areas is multiple, and the multiple liquid-repellent areas are arranged at intervals; A pixel defining layer, disposed on the base substrate and at least partially located in the first area, the pixel defining layer comprising a plurality of first pixel defining strips extending along a first direction and a plurality of second pixel defining strips extending along a second direction, the first direction intersecting the second direction; The surface of the first pixel defining strip facing away from the base substrate is located at a side of the surface of the second pixel defining strip facing away from the base substrate away from the base substrate.

2. The display substrate according to claim 1, characterized in that: The base substrate further includes a plurality of lyophilic regions, and the lyophilic regions are alternately arranged with the lyophobic regions.

3. The display substrate according to claim 1, characterized in that: The base substrate further includes a lyophilic region spaced apart from the first region.

4. The display substrate according to claim 3, characterized in that: There are a plurality of the lyophilic regions, and a plurality of the lyophilic regions are spaced apart and distributed in a direction away from the first region.

5. The display substrate according to claim 1, characterized in that: The display substrate further comprises: Two isolation walls arranged opposite to each other are arranged on the substrate and outside the first area; The blocking structure is disposed on the substrate, outside the first area, and between two adjacent isolation walls.

6. The display substrate according to claim 5, characterized in that: The isolation wall extends integrally from the first pixel defining strip.

7. The display substrate according to claim 5, characterized in that: The isolation wall is parallel to the first direction, and the blocking structure includes a plurality of blocking bars, and the plurality of blocking bars include: a plurality of first barrier bars, arranged in parallel and at intervals and distributed along the first direction, wherein an extension direction of the first barrier bars intersects with the first direction; A plurality of second barrier bars are arranged in parallel and at intervals and distributed along the first direction. The extension direction of the second barrier bars intersects with the first direction. The first barrier bars are arranged alternately with the second barrier bars. Any of the first barrier bars is arranged at intervals with any of the second barrier bars.

8. The display substrate according to claim 7, characterized in that: The blocking bar is spaced apart from the first area, the number of the lyophobic areas is multiple, and the substrate further includes multiple lyophilic areas; between two adjacent isolation walls, the lyophobic areas and the lyophilic areas are alternately arranged along the first direction, and a blocking bar is provided at the junction of adjacent lyophobic areas and the lyophilic areas.

9. The display substrate according to claim 7, characterized in that: The barrier strip includes a first barrier layer and a second barrier layer which are stacked, wherein the first barrier layer is disposed on one side of the base substrate, and the second barrier layer is located on a side of the first barrier layer away from the base substrate, wherein a width of the first barrier layer is smaller than a width of the second barrier layer, and an orthographic projection of the first barrier layer on the base substrate is located within an orthographic projection region of the second barrier layer on the base substrate.

10. The display substrate according to claim 9, characterized in that: The barrier strip further includes a third barrier layer, which is disposed on one side of the base substrate, the first barrier layer is located on a side of the third barrier layer away from the base substrate, the width of the first barrier layer is smaller than the width of the third barrier layer, and the orthographic projection of the first barrier layer on the base substrate is located within the orthographic projection region of the third barrier layer on the base substrate.

11. The display substrate according to claim 5, characterized in that: The display substrate further comprises: The crack isolation structure is provided on the base substrate and is located on a side of the barrier structure away from the first region. The crack isolation structure is an isolation column or an isolation groove.

12. A method for preparing a display substrate, characterized in that: The preparation method is used to prepare the display substrate according to any one of claims 1 to 11, and the preparation method comprises: forming an organic light-emitting material layer by an inkjet printing process; Cutting is performed along a preset track to form a display substrate having a preset shape, wherein the preset track is located on a side of an inner boundary of the liquid-repellent area away from the first area.

13. A display panel, characterized in that: The display panel comprises the display substrate according to any one of claims 1 to 11.

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