Display substrate and display panel

Abstract

The utility model discloses a display substrate and a display panel. The display substrate is provided with a display area and an edge area, the edge area surrounds the periphery of the display area, and the edge area comprises a plurality of side edge positions; the display substrate includes a substrate; the retaining wall is located on one side of the substrate and located on at least part of the side edge of the edge area. According to the display substrate, by arranging the retaining wall, on one hand, the alignment film material can be prevented from expanding to the frame sealing glue arrangement area in the preparation process, and therefore the problems that in the subsequent process, glue fine detection is affected, the conduction performance of a conductive circuit in the display substrate is affected, and stripping of frame sealing glue is affected are solved; on the other hand, the frame sealing glue can be prevented from overflowing to the area where the alignment film is located in the follow-up preparation process, and therefore the situation that the alignment of the alignment film is affected by overflowing of the frame sealing glue is avoided; and on the other hand, external water vapor can be prevented from entering the display substrate, so that metal circuit corrosion caused by the water vapor is avoided.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the field of display technology, and particularly relate to a display substrate and a display panel. Background Art

[0002] LCD (Liquid Crystal Display) has attracted widespread attention for its advantages such as high display quality, no electromagnetic radiation, large viewing area, small size, light weight, good picture effect, wide application range, low voltage, low power consumption and long life.

[0003] In related art, a liquid crystal display panel includes a first substrate and a second substrate. The first and second substrates are aligned and sealed around their edges with a frame sealant. The first and second substrates are aligned to form a cell gap, which is filled with liquid crystal. Each of the first and second substrates includes a base and an alignment film disposed on one side of the base.

[0004] In the related art, the alignment film material is likely to expand outwards to the region where the frame sealant is set during the preparation process, and the frame sealant is likely to overflow into the region where the alignment film is located during the subsequent preparation process. Utility Model Content

[0005] In a first aspect, an embodiment of the present disclosure provides a display substrate having a display area and an edge area, wherein the edge area surrounds the periphery of the display area, wherein the edge area includes a plurality of side positions;

[0006] The display substrate includes a base;

[0007] The retaining wall is located on one side of the base and at least partially on the side of the edge area.

[0008] In some embodiments, the width of the top surface of the retaining wall away from the base is smaller than the width of the bottom surface of the retaining wall close to the base;

[0009] The width of the top surface is the dimension of the top surface in a direction away from the display area; the width of the bottom surface is the dimension of the bottom surface in a direction away from the display area;

[0010] A first acute angle is formed between a first side surface of the retaining wall close to the display area and the substrate;

[0011] A second acute angle is formed between the second side surface of the retaining wall away from the display area and the substrate;

[0012] The first acute angle is less than 80°, and the second acute angle is less than 80°.

[0013] In some embodiments, the angle range of the first acute angle is 40° to 60°;

[0014] The second acute angle ranges from 40° to 60°.

[0015] In some embodiments, the width of the top surface of the retaining wall away from the base is less than or equal to the width of the bottom surface of the retaining wall close to the base;

[0016] The width of the top surface is the dimension of the top surface in a direction away from the display area; the width of the bottom surface is the dimension of the bottom surface in a direction away from the display area;

[0017] The first side surface of the retaining wall close to the display area forms an angle of 80° to 90° with the base;

[0018] The second side surface of the retaining wall away from the display area forms an angle of 80° to 90° with the base.

[0019] In some embodiments, the edge region further includes an angle position,

[0020] The retaining wall is disconnected at the angle position.

[0021] In some embodiments, the edge region further includes an angle position;

[0022] The retaining walls are connected at the angle position,

[0023] The retaining wall is continuous at the side position, and the number of the retaining wall is one.

[0024] In some embodiments, the retaining wall includes a first retaining wall, and the number of the first retaining wall is one; the first retaining wall is distributed at each of the side positions of the edge area; and the first retaining wall is continuous at the side positions.

[0025] In some embodiments, the edge region includes a first side edge region and a second side edge region; the first side edge region includes a first area and a second area, the first area and the second area are oppositely arranged; the second side edge region includes a third area and a fourth area, the third area and the fourth area are oppositely arranged;

[0026] The first retaining wall includes a first sub-retaining wall and a second sub-retaining wall, the first sub-retaining wall is located in the first side edge area, and the second sub-retaining wall is located in the second side edge area;

[0027] The distance between the end of the first sub-retaining wall close to the second sub-retaining wall and the second sub-retaining wall is in the range of 5 to 10 mm;

[0028] The distance between the end of the second sub-retaining wall close to the first sub-retaining wall and the first sub-retaining wall is in the range of 5 to 10 mm.

[0029] In some embodiments, the retaining wall further comprises a second retaining wall,

[0030] The orthographic projection of the second retaining wall on the base is located between the orthographic projection of the first retaining wall on the base and the orthographic projection of the display area on the base; the second retaining wall and the first retaining wall are spaced apart from each other;

[0031] The number of the second retaining wall is at least one;

[0032] The second retaining wall includes a plurality of sub-segments, and the plurality of sub-segments are spaced apart from each other.

[0033] In some embodiments, the second retaining wall is distributed at each side of the edge area.

[0034] In some embodiments, the second retaining walls are distributed at some side positions of the edge region, and the side positions where the second retaining walls are located are not adjacent to each other.

[0035] In some embodiments, the number of the second retaining walls is at least two.

[0036] At least two of the second retaining walls are sequentially spaced apart in a direction away from the display area;

[0037] The sub-sections of two adjacent second retaining walls are positioned correspondingly; or, the sub-sections of two adjacent second retaining walls are positioned staggered.

[0038] In some embodiments, the substrate further includes a frame sealant and an alignment film, wherein the frame sealant, the alignment film and the retaining wall are located on the same side of the substrate.

[0039] The orthographic projection of the retaining wall on the substrate is located between the orthographic projection of the frame sealing glue on the substrate and the orthographic projection of the display area on the substrate;

[0040] The orthographic projection of the alignment film on the substrate is located within the area enclosed by the orthographic projection of the retaining wall on the substrate;

[0041] The orthographic projections of the frame sealant and the retaining wall on the base do not overlap;

[0042] The orthographic projections of the alignment film and the retaining wall on the substrate overlap or do not overlap;

[0043] The orthographic projections of the alignment film and the frame sealing adhesive on the substrate do not overlap.

[0044] In a second aspect, an embodiment of the present disclosure further provides a display panel, which includes the above-mentioned display substrate.

[0045] The display substrate provided by the embodiment of the present disclosure, by providing retaining walls at at least part of the side positions of the edge region of the display substrate, can, on the one hand, prevent the alignment film material from expanding outwards to the frame sealant setting region during the preparation process, thereby avoiding problems such as affecting the fine glue detection, affecting the conductivity of the conductive circuit in the display substrate, and affecting the peeling of the frame sealant in subsequent processes; on the other hand, it can prevent the frame sealant from overflowing into the region where the alignment film is located during the subsequent preparation process, thereby preventing the overflow of the frame sealant from affecting the alignment of the alignment film; and on the third hand, it can prevent external water vapor from entering the display substrate, thereby avoiding corrosion of the metal circuits caused by water vapor.

[0046] The display panel provided by the embodiment of the present disclosure improves the quality of the display panel by adopting the display substrate in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing the detailed exemplary embodiments with reference to the accompanying drawings, in which:

[0048] Figure 1a A schematic top view of a display substrate provided in an embodiment of the present disclosure.

[0049] Figure 1b For the Figure 3a A structural cross-sectional view with the AA' cutting line in the figure.

[0050] Figure 1c A schematic top view of another display substrate provided in an embodiment of the present disclosure.

[0051] Figure 1d A schematic top view of another display substrate provided in an embodiment of the present disclosure.

[0052] Figure 1e A schematic top view of another display substrate provided in an embodiment of the present disclosure.

[0053] Figure 1f For the Figure 1a Another structural cross-sectional view of the AA' section line.

[0054] Figure 2 A schematic top view of another display substrate provided in an embodiment of the present disclosure.

[0055] Figure 3a Schematic diagram of a preparation process of a display substrate in an embodiment of the present disclosure.

[0056] Figure 3bSchematic diagram of another process for preparing a display substrate in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0057] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, a display substrate and a display panel provided by the embodiments of the present disclosure are further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0058] The embodiments of the present disclosure will be described more fully below with reference to the accompanying drawings, but the illustrated embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully enable those skilled in the art to understand the scope of this disclosure.

[0059] The embodiments of the present disclosure are not limited to the embodiments shown in the drawings, but include modifications of the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the drawings are schematic in nature, and the shapes of the regions shown in the drawings illustrate specific shapes of the regions, but are not intended to be limiting.

[0060] In order to solve the above problems in the related art, firstly, referring to Figure 1a-Figure 1f as well as Figure 2 An embodiment of the present disclosure provides a display substrate having a display area 100 and an edge area 101. The edge area 101 surrounds the periphery of the display area 100 and includes multiple side positions. The display substrate includes a base 1; a retaining wall 2, which is located on one side of the base 1 and is located at least partially on the side positions of the edge area 101.

[0061] In some embodiments, reference Figure 1a The display substrate further includes a sealing glue 3 and an alignment film 4. The sealing glue 3, the alignment film 4 and the retaining wall 2 are located on the same side of the substrate 1. The orthographic projection of the retaining wall 2 on the substrate 1 is located between the orthographic projection of the sealing glue 3 on the substrate 1 and the orthographic projection of the display area 100 on the substrate 1; the orthographic projection of the alignment film 4 on the substrate 1 is located within the area enclosed by the orthographic projection of the retaining wall 2 on the substrate 1; the orthographic projections of the sealing glue 3 and the retaining wall 2 on the substrate 1 do not overlap; the orthographic projections of the alignment film 4 and the retaining wall 2 on the substrate 1 partially overlap or do not overlap; the orthographic projections of the alignment film 4 and the frame sealing glue 3 on the substrate 1 do not overlap.

[0062] Among them, by setting the retaining wall 2 at at least part of the side position of the edge area 101 of the display substrate, on the one hand, it can prevent the material of the alignment film 4 from expanding outward to the area where the frame sealant 3 is set during the preparation process, thereby avoiding affecting the fine glue detection (i.e., the width detection of the frame sealant 3) in the subsequent process and affecting the conductive performance of the conductive circuit in the display substrate (for example, the conductive circuit in the display substrate extends from the area where the alignment film 4 is located to the area where the frame sealant 3 is set, and is electrically connected to the circuit in the box substrate through the conductive particles in the local area of ​​the frame sealant 3. If the conductive circuit in the area where the frame sealant 3 is set is covered by the expanded alignment film 4 material, the conductive circuit cannot be electrically connected to the conductive particles in the frame sealant). On the other hand, it can prevent the frame sealant 3 from overflowing into the area where the alignment film 4 is located during the subsequent preparation process (such as during frame glue repair and frame glue splicing, the coating of the frame sealant 3 is likely to exceed its setting area), thereby preventing the overflow of the frame sealant 3 from affecting the alignment of the alignment film 4; on the other hand, it can prevent external water vapor from entering the display substrate, thereby preventing metal circuit corrosion caused by water vapor.

[0063] In some embodiments, reference Figure 1a and Figure 1b , Figure 1a A schematic top view of a display substrate provided in an embodiment of the present disclosure; Figure 1b For the Figure 1a A structural cross-sectional view along the AA' section line; the width s0 of the top surface m1 of the retaining wall 2 away from the base 1 is smaller than the width s1 of the bottom surface m2 of the retaining wall 2 close to the base 1; the width s0 of the top surface m1 is the dimension of the top surface m1 along the direction away from the display area 100; the width s1 of the bottom surface m2 is the dimension of the bottom surface m2 along the direction away from the display area 100; a first acute angle α1 is formed between the first side surface m3 of the retaining wall 2 close to the display area 100 and the base 1; a second acute angle α2 is formed between the second side surface m4 of the retaining wall 2 away from the display area 100 and the base 1; the first acute angle α1 is less than 80°, and the second acute angle α2 is less than 80°.

[0064] In this embodiment, the width s0 of the top surface m1 of the retaining wall 2 is the length dimension of the side edge away from the base 1 along the cross section of the retaining wall 2 perpendicular to the base 1 and its extension direction; the width s1 of the bottom surface m2 of the retaining wall 2 is the length dimension of the side edge close to the base 1 along the cross section of the retaining wall 2 perpendicular to the base 1 and its extension direction.

[0065] In this embodiment, the slope angle between the first side m3 and the second side m4 of the retaining wall 2 and the substrate 1 is relatively small, which makes the slope of the first side m3 and the second side m4 relative to the substrate 1 more gentle. In this way, during the cleaning process after the retaining wall 2 is developed, the water flow can more easily clean the developer at the slope angle position around the retaining wall 2, thereby improving or avoiding the developer remaining at the slope angle position around the retaining wall 2, and further improving or avoiding the residual developer entering the display panel using the display substrate and causing poor display. For example, the residual developer enters the liquid crystal and causes poor blackening and afterimage of the liquid crystal display panel.

[0066] In some embodiments, the first acute angle α1 is in the range of 40° to 60°; the second acute angle α2 is in the range of 40° to 60°.

[0067] In some embodiments, reference Figure 1a The edge area 101 also includes an angle position, and the retaining wall 2 is disconnected at the angle position.

[0068] Among them, by disconnecting the retaining wall 2 at the angle position, the retaining wall 2 can be prevented from being connected at the angle position to form a retaining wall corner, thereby preventing the developer from remaining at the retaining wall corner position, and further preventing the residual developer from entering the display panel using the display substrate and causing poor display, such as residual developer entering the liquid crystal and causing poor blackening and afterimage in the corners of the liquid crystal display panel.

[0069] In some embodiments, reference Figure 1a The retaining wall 2 includes a first retaining wall 21, one of which is located at each side of the edge region 101 and is continuous at the side edges. This effectively prevents the alignment film 4 material from spreading outwards into the area where the sealant 3 is applied during the fabrication process, and also effectively prevents the sealant 3 from overflowing into the area where the alignment film 4 is applied during subsequent fabrication processes.

[0070] In some embodiments, reference Figure 1a The display substrate includes a first side edge region 101a and a second side edge region 101b. The first side edge region 101a includes a first area and a second area, and the first area and the second area are arranged oppositely; the second side edge region 101b includes a third area and a fourth area, and the third area and the fourth area are arranged oppositely; for example, referring to Figure 1aThe first area may be the area on the left of the first side edge area 101a, the second area may be the area on the right of the first side edge area 101a, the third area may be the area above the second side edge area 101b, and the fourth area may be the area below the first side edge area 101b. The first retaining wall 21 includes a first sub-retaining wall 21a and a second sub-retaining wall 21b. The first sub-retaining wall 21a is located in the first side edge area 101a, and the second sub-retaining wall 21b is located in the second side edge area 101b. The distance s2 between the end of the first sub-retaining wall 21a close to the second sub-retaining wall 21b and the second sub-retaining wall 21b ranges from 5 to 10 mm. The distance s3 between the end of the second sub-retaining wall 21b close to the first sub-retaining wall 21a and the first sub-retaining wall 21a ranges from 5 to 10 mm.

[0071] Such a setting can further avoid the connection between the sub-blocking walls located in the adjacent first area and third area, the adjacent first area and fourth area, the adjacent second area and third area, and the adjacent second area and fourth area to form a blocking wall corner, thereby avoiding the developer remaining in the blocking wall corner position, and further avoiding the residual developer from entering the display panel using the display substrate and causing poor display, such as residual developer entering the liquid crystal and causing poor blackening and afterimage in the corners of the liquid crystal display panel.

[0072] In some embodiments, reference Figure 1c , which is a top view schematic diagram of another display substrate provided by an embodiment of the present disclosure; wherein, the retaining wall 2 also includes a second retaining wall 22, and the orthographic projection of the second retaining wall 22 on the substrate 1 is located between the orthographic projection of the first retaining wall 21 on the substrate 1 and the orthographic projection of the display area 100 on the substrate 1; the second retaining wall 22 and the first retaining wall 21 are spaced apart from each other; the number of the second retaining wall 22 is at least one; the second retaining wall 22 includes a plurality of sub-segments 220, and the plurality of sub-segments 220 are spaced apart from each other.

[0073] With such a configuration, the first retaining wall 21 can better prevent the alignment film 4 material from expanding outward to the area where the frame sealant 3 is set during the preparation process, and at the same time better prevent the frame sealant 3 from overflowing into the area where the alignment film 4 is located in the subsequent preparation process; the second retaining wall 22 can fully accommodate the alignment film 4 material that expands outward to the area where the retaining wall 2 is located, thereby preventing the alignment film 4 material from further diffusing outward from the first retaining wall 21.

[0074] In some embodiments, reference Figure 1c The second retaining wall 22 is distributed at each side position of the edge area 101.

[0075] In some embodiments, reference Figure 1d and Figure 1e , Figure 1d A schematic top view of another display substrate provided in an embodiment of the present disclosure; Figure 1eThis is a schematic top view of another display substrate provided by an embodiment of the present disclosure; the second retaining walls 22 are distributed at some side positions of the edge region 101, and the side positions where the second retaining walls 22 are located are not adjacent to each other.

[0076] In some embodiments, reference Figure 1d and Figure 1e There are multiple second blocking walls 22 , and the multiple second blocking walls 22 are arranged in sequence along a direction away from the display area 100 .

[0077] The second retaining wall 22 can further prevent the alignment film 4 material from expanding to the area where the sealant 3 is set during the preparation process, and further prevent the sealant 3 from overflowing to the area where the alignment film 4 is located during the subsequent preparation process. Figure 1d and Figure 1e In theory, the same number of retaining walls 2 are installed at each side of the edge area 101. However, due to insufficient space in some side areas (such as the first and second areas, or the third and fourth areas), only one retaining wall 2 is installed. Therefore, the number of retaining walls 2 installed at each side of the edge area 101 is determined based on whether there is sufficient space at each side.

[0078] In some embodiments, reference Figure 1d The number of second retaining walls 22 is two. In other embodiments, the number of second retaining walls 22 is more than two. At least two second retaining walls 22 are sequentially spaced apart in a direction away from the display area 100; the sub-segments 220 of two adjacent second retaining walls 22 correspond to each other.

[0079] In some embodiments, reference Figure 1e The sub-segments 220 of two adjacent second retaining walls 22 are staggered. The staggered sub-segments 220 can better accommodate the alignment film 4 material that expands during the preparation process, thereby better preventing the alignment film 4 material from expanding into the area where the frame sealant 3 is placed during the preparation process.

[0080] The inventors of the present disclosure have found that compared with the retaining walls 2 located at the side positions of the edge area 101, the developer residue phenomenon of the retaining walls 2 located at the angle positions of the edge area 101 is much more serious. Therefore, it is possible to focus on solving the developer residue problem at the angle positions of the edge area 101 to improve the defects of the display panel using the display substrate. Based on this, in some embodiments, referring to Figure 1f , for along Figure 1aAnother structural cross-sectional view along the AA' section line; the width s0 of the top surface m1 of the retaining wall 2 away from the substrate 1 is less than or equal to the width s1 of the bottom surface m2 of the retaining wall 2 close to the substrate 1; the width s0 of the top surface m1 is the dimension of the top surface m1 in the direction away from the display area 100; the width s1 of the bottom surface m2 is the dimension of the bottom surface m2 in the direction away from the display area 100; the first side surface m3 of the retaining wall 2 close to the display area 100 forms an angle of 80° to 90° with the substrate 1; the second side surface m4 of the retaining wall 2 away from the display area 100 forms an angle of 80° to 90° with the substrate 1. Setting the retaining wall 2 to be disconnected at the angle position of the edge area 101 in this way can avoid developer residue at the angle position of the edge area 101, thereby improving the defects of the display panel using this display substrate. In addition, the first side surface m3 of the retaining wall 2 close to the display area 100 is set to form an angle of 80° to 90° with the substrate 1; the second side surface m4 of the retaining wall 2 away from the display area 100 is set to form an angle of 80° to 90° with the substrate 1. Therefore, a conventional mask plate can be used when preparing the retaining wall 2, and a half-tone mask plate is not required, which reduces the cost of using the mask plate and reduces the difficulty of preparing the retaining wall 2.

[0081] In some embodiments, reference Figure 2 , Figure 2 This is a top view of another display substrate provided by an embodiment of the present disclosure, wherein the edge region 101 also includes an angle position; the retaining wall 2 is connected at the angle position, the retaining wall 2 is continuous at the side position, and the number of retaining walls 2 is one.

[0082] In this embodiment, Figure 2 The cross-sectional shape of the middle retaining wall 2 is as follows: Figure 1b As shown, Figure 2 The cross section of the middle retaining wall 2 is perpendicular to the base 1 and perpendicular to the extending direction of the retaining wall 2. The extending direction of the retaining wall 2 is parallel to the base 1. Figure 2 The first retaining walls 21 distributed on each side of the edge area 101 are connected at the angle. Through the above arrangement, the alignment film 4 material can be further prevented from expanding to the area where the sealant 3 is set during the preparation process, and the sealant 3 can be prevented from overflowing to the area where the alignment film 4 is located during the subsequent preparation process, and external water vapor can be prevented from entering the display substrate. At the same time, in order to prevent the developer from remaining around the retaining wall 2, Figure 2 The cross-sectional shape of the middle retaining wall 2 is set as follows Figure 1bThe cross-sectional shape shown makes the slope angle between the first side m3 and the second side m4 of the retaining wall 2 and the substrate 1 smaller, making the slope of the first side m3 and the second side m4 relative to the substrate 1 more gentle. In this way, during the cleaning process after the retaining wall 2 is developed, the water flow can more easily clean the developer at the slope angle position around the retaining wall 2, thereby improving or avoiding the developer remaining at the slope angle position around the retaining wall 2, and further improving or avoiding the residual developer entering the display panel using the display substrate and causing poor display.

[0083] In some embodiments, the distance between adjacent first retaining walls 21 and second retaining walls 22 is 25-35 μm; the distance between any two adjacent second retaining walls 22 is 25-35 μm; and the width s0 of the top surface m1 of the retaining wall 2 is 15-25 μm.

[0084] In some embodiments, the distance between the frame sealant 3 and the retaining wall 2 farthest from the display area 100 ranges from 0 to 500 μm.

[0085] In some embodiments, the display substrate is a color film substrate, referring to Figure 1a , Figure 1c-1e , Figure 2 The color filter substrate further includes a black matrix 5, a color resist layer 6, and a conductive layer (not shown). The black matrix 5, color resist layer 6, conductive layer, retaining wall 2, and alignment film 4 are stacked in this order away from the substrate 1. The black matrix 5 is located in the display area 100 and covers the edge area 101. The color resist layer 6 is located in the display area 100 and a portion of the edge area 101 adjacent to the display area 100. The orthographic projection of the color resist layer 6 in the edge area 101 on the substrate 1 is within the area enclosed by the orthographic projection of the retaining wall 2 on the substrate 1. The orthographic projection of the alignment film 4 on the substrate 1 is within the area enclosed by the orthographic projection of the retaining wall 2 on the substrate 1, and the alignment film 4 covers the entire display area 100. The conductive layer extends from the display area 100 to the edge area 101. The frame sealant 3 is applied to the color filter substrate when the color filter layer substrate is aligned with the alignment substrate.

[0086] In some embodiments, the display substrate may also be an array substrate, comprising a pixel circuit and an alignment film. The pixel circuit, retaining walls, and alignment film are stacked sequentially away from the base. The pixel circuit is located in the display area and edge area. Frame sealant is applied to the array substrate during assembly with the assembly substrate.

[0087] Based on the above structure of the display substrate, an embodiment of the present disclosure also provides a method for preparing a display substrate, wherein the display substrate has a display area and an edge area, and the edge area surrounds the periphery of the display area; the edge area includes multiple side positions; the preparation method includes: preparing a retaining wall on one side of the base; the retaining wall is located at least partially at the side position of the edge area.

[0088] In some embodiments, reference Figure 3a , is a schematic diagram of a process for preparing a display substrate according to an embodiment of the present disclosure; wherein, a substrate 1 is prepared on one side thereof. Figure 1b The retaining wall 2 shown in the figure comprises: step S1: forming a retaining wall film layer 7 on one side of the substrate 1.

[0089] Step S2: exposing, developing and cleaning the retaining wall film layer 7 to form a pattern of the retaining wall 2.

[0090] In this step, a mask plate 8 is used to expose the retaining wall film layer 7; the mask plate 8 includes a first pattern 81 and a slit pattern 82, and the slit pattern 82 is arranged on opposite sides of the first pattern 81; the middle structure of the retaining wall 2 is formed by the first pattern 81; the first side surface m3 and the second side surface m4 of the retaining wall 2 are formed by the slit pattern 82.

[0091] In this step, the retaining wall 2 formed by exposure using the mask plate 8 is located in the edge area; the width of the top surface of the retaining wall 2 away from the substrate 1 is smaller than the width of the bottom surface of the retaining wall 2 close to the substrate 1; the width of the top surface is the dimension of the top surface along the direction away from the display area; the width of the bottom surface is the dimension of the bottom surface along the direction away from the display area; the first side surface m3 of the retaining wall 2 close to the display area forms a first acute angle α1 with the substrate 1; the second side surface m4 of the retaining wall 2 away from the display area forms a second acute angle α2 with the substrate 1; the first acute angle α1 is less than 80°, and the second acute angle α2 is less than 80°.

[0092] In this step, water flow is used to clean the developer after development, and finally a high-pressure air gun is used to peel off the water film after cleaning.

[0093] In some embodiments, the first pattern 81 and the slit pattern 82 are light-transmitting patterns.

[0094] In some embodiments, the width s4 of the slit pattern 82 is in the range of 2 to 3 μm. The exposure light passing through the slit pattern 82 is diffracted, thereby forming a first side surface m3 having a slope angle less than 80° and a second side surface m4 having a slope angle less than 80°.

[0095] The retaining wall 2 prepared by the above-mentioned preparation method has a reduced slope angle between the first side m3 and the second side m4 and the substrate 1, which makes the slope of the first side m3 and the second side m4 relative to the substrate 1 more gentle. In this way, during the cleaning process after the retaining wall 2 is developed, the water flow can more easily clean the developer at the slope angle position around the retaining wall 2, thereby improving or avoiding the developer remaining at the slope angle position around the retaining wall 2, and further improving or avoiding the residual developer entering the display panel using the display substrate to cause poor display, such as the residual developer entering the liquid crystal to cause poor blackening and afterimage of the liquid crystal display panel.

[0096] In some embodiments, reference Figure 3b , is a schematic diagram of another process for preparing a display substrate according to an embodiment of the present disclosure; wherein, a substrate 1 is prepared on one side thereof. Figure 1f The retaining wall shown in 2 is prepared with Figure 1b The retaining wall 2 shown in FIG is different in that a mask plate 8 is used to expose the retaining wall film layer 7 ; the mask plate 8 only includes a first pattern 81 , and the retaining wall 2 is correspondingly formed by the first pattern 81 .

[0097] In this step, the retaining wall 2 formed by exposure using the mask plate 8 is located in the edge area; the width of the top surface of the retaining wall 2 away from the substrate 1 is less than or equal to the width of the bottom surface of the retaining wall 2 close to the substrate 1; the width of the top surface is the dimension of the top surface along the direction away from the display area; the width of the bottom surface is the dimension of the bottom surface along the direction away from the display area; the first side surface m3 of the retaining wall 2 close to the display area forms an angle of 80° to 90° with the substrate 1; the second side surface m4 of the retaining wall 2 away from the display area forms an angle of 80° to 90° with the substrate 1.

[0098] The display substrate provided by the embodiment of the present disclosure, by providing retaining walls at at least part of the side positions of the edge region of the display substrate, can, on the one hand, prevent the alignment film material from expanding outwards to the frame sealant setting region during the preparation process, thereby avoiding problems such as affecting the fine glue detection, affecting the conductivity of the conductive circuit in the display substrate, and affecting the peeling of the frame sealant in subsequent processes; on the other hand, it can prevent the frame sealant from overflowing into the region where the alignment film is located during the subsequent preparation process, thereby preventing the overflow of the frame sealant from affecting the alignment of the alignment film; and on the third hand, it can prevent external water vapor from entering the display substrate, thereby avoiding corrosion of the metal circuits caused by water vapor.

[0099] In a second aspect, an embodiment of the present disclosure further provides a display panel, comprising the display substrate in the above embodiment.

[0100] By adopting the display substrate in the above embodiment, the quality of the display panel is improved.

[0101] The display panel provided in the embodiments of the present disclosure may be any product or component with a display function, such as an LCD panel, an LCD television, an LCD billboard, a display, a mobile phone, or a navigation device.

[0102] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A display substrate comprising a display area and an edge area, wherein the edge area surrounds the periphery of the display area. in, The edge region includes a plurality of side locations; The display substrate includes a base; a retaining wall located on one side of the base and at least partially on a side of the edge area; The width of the top surface of the retaining wall away from the base is smaller than the width of the bottom surface of the retaining wall close to the base; The width of the top surface is the dimension of the top surface in a direction away from the display area; the width of the bottom surface is the dimension of the bottom surface in a direction away from the display area; A first acute angle is formed between a first side surface of the retaining wall close to the display area and the substrate; A second acute angle is formed between the second side surface of the retaining wall away from the display area and the substrate; The first acute angle is less than 80°, and the second acute angle is less than 80°.

2. The display substrate according to claim 1, wherein The angle range of the first acute angle is 40° to 60°; The second acute angle ranges from 40° to 60°.

3. The display substrate according to claim 1, wherein The width of the top surface of the retaining wall away from the base is less than or equal to the width of the bottom surface of the retaining wall close to the base; The width of the top surface is the dimension of the top surface in a direction away from the display area; the width of the bottom surface is the dimension of the bottom surface in a direction away from the display area; The first side surface of the retaining wall close to the display area forms an angle of 80° to 90° with the base; The second side surface of the retaining wall away from the display area forms an angle of 80° to 90° with the base.

4. The display substrate according to any one of claims 2 to 3, wherein: The edge area also includes an angle position, The retaining wall is disconnected at the angle position.

5. The display substrate according to claim 1 or 2, wherein: The edge region also includes an angle position; The retaining walls are connected at the angle position, The retaining wall is continuous at the side position, and the number of the retaining wall is one.

6. The display substrate according to claim 4, wherein: The retaining wall includes a first retaining wall, and the number of the first retaining wall is one; the first retaining wall is distributed at each side position of the edge area; The first retaining wall is continuous at the side position.

7. The display substrate according to claim 6, wherein: The edge region includes a first side edge region and a second side edge region; the first side edge region includes a first area and a second area, the first area and the second area are arranged opposite to each other; the second side edge region includes a third area and a fourth area, the third area and the fourth area are arranged opposite to each other; The first retaining wall includes a first sub-retaining wall and a second sub-retaining wall, the first sub-retaining wall is located in the first side edge area, and the second sub-retaining wall is located in the second side edge area; The distance between the end of the first sub-retaining wall close to the second sub-retaining wall and the second sub-retaining wall is in the range of 5 to 10 mm; The distance between the end of the second sub-retaining wall close to the first sub-retaining wall and the first sub-retaining wall is in the range of 5 to 10 mm.

8. The display substrate according to claim 7, wherein: The retaining wall also includes a second retaining wall, The orthographic projection of the second retaining wall on the base is located between the orthographic projection of the first retaining wall on the base and the orthographic projection of the display area on the base; the second retaining wall and the first retaining wall are spaced apart from each other; The number of the second retaining wall is at least one; The second retaining wall includes a plurality of sub-segments, and the plurality of sub-segments are spaced apart from each other.

9. The display substrate according to claim 8, wherein: The second retaining walls are distributed at each side of the edge area.

10. The display substrate according to claim 8, wherein The second retaining walls are distributed at some side positions of the edge area, and the side positions where the second retaining walls are located are not adjacent to each other.

11. The display substrate according to any one of claims 8 to 10, wherein: The number of the second retaining walls is at least two, At least two of the second retaining walls are sequentially spaced apart in a direction away from the display area; The sub-sections of two adjacent second retaining walls are positioned correspondingly; or, the sub-sections of two adjacent second retaining walls are positioned staggered.

12. The display substrate according to claim 1, wherein It also includes a frame sealant and an alignment film, wherein the frame sealant, the alignment film and the retaining wall are located on the same side of the substrate. The orthographic projection of the retaining wall on the substrate is located between the orthographic projection of the frame sealing glue on the substrate and the orthographic projection of the display area on the substrate; The orthographic projection of the alignment film on the substrate is located within the area enclosed by the orthographic projection of the retaining wall on the substrate; The orthographic projections of the frame sealant and the retaining wall on the base do not overlap; The orthographic projections of the alignment film and the retaining wall on the substrate overlap or do not overlap; The orthographic projections of the alignment film and the frame sealing adhesive on the substrate do not overlap.

13. A display panel, wherein: The display substrate comprises the display substrate according to any one of claims 1 to 12.

Images