CN114488625A - Display panels and display devices - Google Patents

Abstract

The invention discloses a display panel, which comprises a first substrate, a second substrate and liquid crystal; the first substrate is provided with a black matrix and at least one spacer; the second substrate is provided with more than two retaining walls, at least two retaining walls define a first area and a second area adjacent to the first area on the second substrate, the orthographic projection of the spacer on the second substrate is positioned in the first area, the orthographic projection of the spacer on the first substrate and the orthographic projection of the retaining walls on the first substrate are both positioned in the orthographic projection range of the black matrix on the first substrate; in the direction perpendicular to the thickness of the display panel, the cross section of the retaining wall is configured to enable the resistance of the spacer to slide out from the first area to the second area to be greater than the resistance of the spacer to slide in from the second area to the first area. Therefore, the blocking objects can slide out of the retaining wall difficultly, even if the blocking objects slide out of the retaining wall, the blocking objects can slide back to the original positions more easily, the problem of light leakage is avoided, and the product yield is improved.

Description

Display panels and display devices

technical field

The invention belongs to the field of display technology, and in particular relates to a display panel and a display device.

Background technique

With the development of liquid crystal display technology, customers have higher and higher requirements for the reliability results and display effects of liquid crystal display panels. A general TFT-LCD (thin film transistor liquid crystal display) includes an array (Array) substrate and a color filter (CF) substrate, and liquid crystal is filled between the two substrates. In order to prevent uneven force inside the liquid crystal panel, a spacer (PS) is usually made on one side of the color filter (CF) substrate to support it.

When the LCD displays the L0 screen, the liquid crystal will deflect due to the existence of the fringing electric field at the edge of the pixel, resulting in a certain gray-scale brightness. Since the black matrix (BM) can block it, there will be no light leakage. However, when the display panel is pressed or subjected to a drop test, the two layers of substrates will be dislocated, and the spacers will slide in-plane. When the spacer slides out for a certain distance, the weak area of the fringe electric field will be exposed, resulting in light leakage.

SUMMARY OF THE INVENTION

The present invention is made based on the inventors' findings and understanding of the following facts and problems:

The existing retaining wall cannot completely prevent the spacer from sliding out of the retaining wall. When the spacer slides out from the retaining wall, it is difficult for the spacer to slide back to the original position, and light leakage will occur, which will cause damage to the display panel. Permanently, reducing product yield.

The present invention aims to improve the above-mentioned technical problems at least to a certain extent.

In one aspect of the present invention, the present invention provides a display panel, the display panel includes a first substrate and a second substrate disposed opposite to each other, and liquid crystal filled between the first substrate and the second substrate; The first substrate is provided with a black matrix, a color blocking layer and at least one spacer; the second substrate is provided with more than two retaining walls, and at least two of the retaining walls are on the second substrate A first area is defined, and a second area adjacent to the first area, the orthographic projection of the spacer on the second substrate is located in the first area, and the spacer is in the first area The orthographic projection on the first substrate and the orthographic projection of the retaining wall on the first substrate are both located within the orthographic projection range of the black matrix on the first substrate; when perpendicular to the display In the direction of the thickness of the panel, the cross-sectional shape of the retaining wall is configured such that the resistance of the spacer sliding out from the first area to the second area is greater than that from sliding in from the second area. resistance of the first region. Therefore, the resistance received by the spacer when sliding out from the retaining wall is relatively large, and the spacer can be increased so that the spacer can be more easily slid back to the original position, avoiding the problem of light leakage, and improving the product yield.

According to an embodiment of the present invention, the blocking wall has a first side wall in the direction from the first area to the second area, and the blocking wall in the direction from the second area to the first area The wall has a second side wall, the first side wall has a protrusion toward the side of the second area, and the second side wall has a depression toward the side of the second area. As a result, when the spacer slides out from between adjacent retaining walls, the contact area between the spacer and the retaining wall is larger, and the resistance received by the spacer is larger, making it difficult for the spacer to slide out of the retaining wall . Even if the spacer slides out from between the adjacent retaining walls, in the process of the spacer re-sliding between the adjacent retaining walls, the contact area between the spacer and the retaining wall is small, and the spacer is further affected. The resistance is smaller, and the spacer is easier to slide back between the adjacent retaining walls, that is, the spacer is easier to slide back to the original position, which further improves the product yield.

According to an embodiment of the present invention, the first side wall and the second side wall are arc-shaped or wedge-shaped. As a result, it is more difficult for the spacer to slide out of the retaining wall. Even if the spacer slips out between adjacent retaining walls, it is easier for the spacer to slide back into its original position.

According to an embodiment of the present invention, both the first side wall and the second side wall are arc-shaped, or both the first side wall and the second side wall are wedge-shaped. As a result, the difficulty of the spacer sliding out from the retaining wall is increased, and even if the spacer slides out from between adjacent retaining walls, the spacer is easier to slide back to the original position, thereby further avoiding the occurrence of the problem of light leakage.

According to an embodiment of the present invention, the first substrate further includes a first substrate and a planarization layer arranged in layers, the black matrix is located on one surface of the first substrate, and the color resist layer covers the a first substrate and the black matrix, the planarization layer is located on the side of the color resist layer away from the first substrate; the spacer is arranged on the planarization layer; the second The substrate includes a second substrate, a source-drain metal layer and a second insulating layer stacked in sequence, and the blocking wall is formed by at least the source-drain metal layer and the second insulating layer. Therefore, the blocking wall on the second substrate can be used to block the spacer on the side of the first substrate from sliding out of the barrier formed by the blocking wall.

According to an embodiment of the present invention, the retaining wall has steps. As a result, the step difference can be reduced, thereby making it easier for the spacer to return to the original position.

According to an embodiment of the present invention, the blocking wall has a first side wall in the direction from the first area to the second area, and the blocking wall in the direction from the second area to the first area The wall has a second side wall, and the step is located on one side of the second side wall. Therefore, after the spacer slides out from between the adjacent retaining walls, the spacer can return between the adjacent retaining walls after a small step difference, and the resistance of the spacer sliding back to the original position is small, The spacer is easier to return to its original position, further avoiding light leakage problems.

According to an embodiment of the present invention, the retaining wall is formed by the source-drain metal layer and the second insulating layer, and the source-drain metal layer forming the retaining wall has at least one protrusion. As a result, the step difference can be reduced, thereby making it easier for the spacer to return to the original position.

According to an embodiment of the present invention, the second substrate further includes a gate metal layer and a first insulating layer, and the gate metal layer and the first insulating layer are located between the second substrate and the source-drain metal layer the first insulating layer is located on the side close to the source-drain metal layer; the retaining wall is composed of the gate metal layer, the first insulating layer, the source-drain metal layer and the second insulating layer layer composition.

According to an embodiment of the present invention, a side of the retaining wall facing the first region further has a groove. Therefore, the resistance of the spacer to slide out of the blocking wall can be increased, and the occurrence of the problem of light leakage can be further avoided.

According to an embodiment of the present invention, the distance between the spacer and the retaining wall is greater than 17.2 microns and less than 30 microns. Thereby, the occurrence of the light leakage problem can be further avoided.

In another aspect of the present invention, the present invention also provides a display device, comprising the aforementioned display panel. Therefore, the display device has all the features and advantages of the aforementioned display panel, which will not be repeated here.

Description of drawings

1 is a schematic structural diagram of an existing display panel;

2 is a schematic structural diagram of the existing display panel after the spacer slides out from the retaining wall;

3 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

4 is a top view of an existing display panel;

5 is a top view of the display panel when the first side wall and the second side wall are both arc-shaped in an embodiment of the present invention;

6 is a top view of the display panel when the first sidewall and the second sidewall are both wedge-shaped in an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a display panel in another embodiment of the present invention;

8 is a schematic structural diagram of the spacer in the process of returning to the original position after the spacer slides out from the retaining wall in an embodiment of the present invention;

9 is another structural schematic diagram of the spacer in the process of returning to the original position after the spacer slides out from the retaining wall in an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of the display device when the distance between the spacer and the retaining wall is too large and the position of the spacer moves.

Description of reference numerals

100-first substrate, 110-first substrate, 120-black matrix, 130-color resist layer, 140-planarization layer, 200-second substrate, 210-second substrate, 220-gate metal layer, 230 -first insulating layer, 240-source-drain metal layer, 250-second insulating layer, 260-common electrode, 270-pixel electrode, 300-spacer, 400-retaining wall, 400a-first sidewall, 400b- The second sidewall, 500-first data line, 600-second data line, S-step, G-groove, A-first region, B-second region.

Detailed ways

Embodiments of the present application are described in detail below. The embodiments described below are exemplary, only used to explain the present application, and should not be construed as a limitation to the present application. If no specific technique or condition is indicated in the examples, the technique or condition described in the literature in the field or the product specification is used. The reagents used are not marked with the manufacturer, they are all conventional products that can be obtained from the market.

Referring to Figure 1, the display panel has a weak electric field area at the edge of the pixel (the small sun area in Figure 1). When the L0 screen is displayed, the liquid crystal will deflect in this part of the area due to the existence of the fringe electric field, resulting in a certain grayscale brightness, black matrix 120 can block it to prevent light leakage in this part of the area. When the display panel is pressed or subjected to a drop test, the two layers of substrates will be dislocated, and the spacer 300 will slide in-plane. When the spacer 300 slides out for a certain distance, the weak area of the fringe electric field will be exposed to cause light leakage.

Referring to FIG. 2 , when the display panel is subjected to a strong impact (such as falling), the spacer 300 has a large displacement and has slipped out of the retaining wall. When the external force disappears, the retaining wall blocks the spacer 300 outside the retaining wall. , the original position cannot be restored, and the brightness of the grayscale at the edge of the pixel will be exposed in the pixel area, resulting in light leakage. However, once the spacer slides out from the retaining wall, it is difficult to slide back to the original position, the damage to the display panel is permanent, and the product yield is reduced.

In order to improve the above-mentioned technical problems, the present invention provides a display panel. Referring to FIG. 3 , the display panel includes a first substrate 100 and a second substrate 200 arranged oppositely, and a display panel filled between the first substrate 100 and the second substrate 200 . Liquid crystal; the first substrate 100 is provided with a black matrix 120, a color blocking layer 130 and at least one spacer 300; the second substrate 200 is provided with more than two barrier walls 400, at least two barrier walls 400 are arranged on the second substrate 200 defines a first area A and a second area B adjacent to the first area A, the orthographic projection of the spacer 300 on the second substrate 200 is located in the first area A, and the spacer 300 is in the first area A. The orthographic projection on the substrate 100 and the orthographic projection of the retaining wall 400 on the first substrate 100 are both located within the orthographic projection range of the black matrix 120 on the first substrate 100; in the direction perpendicular to the thickness of the display panel, the retaining wall The cross-sectional shape of 400 is configured such that the resistance of the spacer 300 sliding out from the first area A to the second area B is greater than the resistance of sliding in from the second area B to the first area A. Therefore, the resistance of the spacer 300 to slide out from the first area A is relatively large, which can further prevent the spacer 300 from sliding out from between the adjacent blocking walls 400, thereby avoiding the problem of light leakage; Sliding out between adjacent retaining walls 400, since the spacer 300 has less resistance to slide into the original position after sliding out, the spacer 300 can slide back to the original position more easily after sliding out of the retaining wall 400 , thereby avoiding light leakage and improving product yield.

According to an embodiment of the present invention, the blocking wall 400 has a first side wall 400 a in the direction from the first area A to the second area B, and the blocking wall 400 has a second side in the direction from the second area B to the first area A For the wall 400b, the first side wall 400a has a protrusion toward the second area B side, and the second side wall 400b has a depression toward the second area B side. Therefore, when the spacer 300 slides under force, the shape of the blocking wall 400 can well wrap the spacer 300, so that the contact area between the spacer 300 and the blocking wall 400 is larger, and the spacer 300 is increased. The movement resistance of the spacer 300 makes it more difficult for the spacer 300 to slip out from between the adjacent blocking walls 400 . Even if the spacer 300 is strongly impacted and slides out of the retaining wall 400, since the contact area between the spacer 300 and the retaining wall 400 is small during recovery, the resistance during recovery is small, and the spacer 300 can easily slide back to the original state. position, and also avoid the occurrence of light leakage problems.

The display panel may also include other components. Referring to FIG. 3 , the display panel further includes a common electrode 260 and a pixel electrode 270 , the common electrode 260 is located on the surface of the second substrate 210 close to the first substrate 100 , and the pixel electrode 270 is located on the second insulating layer 250 away from the second substrate 210 surface on one side.

Referring to FIG. 4 , the display panel further includes a plurality of first data lines 500 along the first direction and a plurality of second data lines 600 along the second direction, and the plurality of first data lines 500 and the second data lines 600 constitute a plurality of Pixels, the orthographic projection of the spacer 300 and the orthographic projection of the retaining wall 400 can overlap with the orthographic projection of the first data line 500 and the orthographic projection of the second data line 600 . This design can increase the area of the display area and improve the aperture ratio. The first data line 500 and the second data line 600 may be metals such as gate lines and data lines.

It can also be seen from FIG. 4 that the side wall of the existing retaining wall 400 is a plane parallel to the thickness direction of the first substrate 100 .

According to an embodiment of the present invention, the first side wall 400a and the second side wall 400b are arc-shaped or wedge-shaped. Therefore, when the spacer 300 slides out from the first area A to the second area B, compared with the existing solution, the contact area between the barrier wall 400 and the spacer 300 of the present invention is larger, and the barrier wall 400 is in the The resistance received during the sliding out process is greater, and the septum 300 is more difficult to slide out. When the spacer 300 slides into the first area A from the second area B, compared with the existing solution, the contact area between the barrier wall 400 and the spacer 300 of the present invention is smaller, and the barrier wall 400 is in the process of sliding in. The resistance received by the spacer 300 is smaller, that is, the spacer 300 is easier to slide back to the original position, thereby avoiding light leakage.

It should be noted that the term "arc" means that the orthographic projection of the first side wall 400a and/or the second side wall 400b on the first substrate 100 is a circular arc. The size is not limited, and those skilled in the art can choose according to usage requirements.

The term "wedge" means that the orthographic projection of the first side wall 400a and/or the second side wall 400b on the first substrate 100 is two straight lines, and the two straight lines intersect, and the included angle formed by the two straight lines is different Equal to 180 degrees.

According to an embodiment of the present invention, both the first sidewall 400a and the second sidewall 400b are arc-shaped, or both the first sidewall 400a and the second sidewall 400b are wedge-shaped. FIG. 5 shows a case where both the first side wall 400a and the second side wall 400b are arc-shaped. FIG. 6 shows the case where both the first side wall 400a and the second side wall 400b are wedge-shaped. It should be noted that the shapes of the first sidewall 400a and the second sidewall 400b are not limited to arcs and wedges, and the first sidewall 400a and the second sidewall 400b may also have other shapes as long as the wrapping can be improved. More preferably, it is sufficient to facilitate the sliding back of the spacer 300 .

According to an embodiment of the present invention, the first substrate 100 further includes a first substrate 110 and a planarization layer 140 arranged in layers, the black matrix 120 is located on one surface of the first substrate 110 , and the black matrix 120 covers the first substrate 110 Part of the surface of the color resist layer 130 covers the first substrate 110 and the black matrix 120; The second substrate 200 includes a second substrate 210 , a source-drain metal layer 240 and a second insulating layer 250 stacked in sequence, and the barrier wall 400 is formed by at least the source-drain metal layer 240 and the second insulating layer 250 . Therefore, the blocking wall 400 on the second substrate 200 can be used to block the spacer 300 on the side of the first substrate 100 from sliding out of the barrier formed by the blocking wall 400 .

According to an embodiment of the present invention, referring to FIG. 3 , the retaining wall 400 has a step S. As shown in FIG. In this way, the step difference when the spacer 300 is moved can be reduced, thereby making it easier for the spacer 300 to return to the original position.

The present invention does not limit the method for forming the step S on the retaining wall 400, and those skilled in the art can select a corresponding process according to requirements. For example, the source-drain metal layer can be formed into a stepped shape through a halftone process design.

According to an embodiment of the present invention, the blocking wall 400 has a first side wall 400 a in the direction from the first area A to the second area B, and the blocking wall 400 has a second side in the direction from the second area B to the first area A The wall 400b, the step S is located on the side of the second side wall 400b. Therefore, referring to FIGS. 3 and 7 , when the spacer 300 moves from the first area A to the second area B, the step difference is large, the resistance is large, and the spacer 300 is not easy to slip out of the first area A. Even if the spacer 300 slides out from the first area A, since the second side wall 400b has the step S, in the process of moving the spacer 300 from the second area B to the first area A, the resistance is relatively small due to the small step difference. If the spacer 300 is small, the spacer 300 can be more easily slid into the first region A from the second area B, that is, the spacer 300 can be returned to the starting position more easily, thereby avoiding the occurrence of the light leakage problem.

In the existing display panel, the level difference of the barrier wall 400 is relatively large. After the spacer 300 slides out of the barrier wall 400 , it is difficult for the spacer 300 to return to the original position, causing the problem of light leakage and greening. In the present invention, by setting the step S on one side of the second side wall 400b, during the process of sliding the spacer 300 to the initial position, it only needs to experience one or two small step-like step differences before sliding back to the initial position. 8 and 9 show the schematic diagram of the structure of the spacer 300 during the process of returning to the original position after the spacer 300 slides out from the retaining wall 400. After the spacer 300 slides out of the retaining wall 400, the spacer The spacer 300 slides from FIG. 7 to the position shown in FIG. 8 , and then the spacer 300 slides back to the position shown in FIG. 9 through a small step-like step difference, and finally the spacer 300 can be slid back to the position shown in FIG. 7 , that is, the spacer 300 finally slides back to the original position. The design of the present invention reduces the resistance received by the spacer 300 in the process of returning to the initial position, making it easier for the spacer 300 to return to the initial position, and further avoiding the occurrence of the problem of light leakage.

According to an embodiment of the present invention, the blocking wall 400 is formed by the source-drain metal layer 240 and the second insulating layer 250 , and the source-drain metal layer 240 forming the blocking wall 400 has at least one protrusion. Referring to FIG. 3 and FIG. 7 , the source-drain metal layer 240 has one protrusion, but it is not limited thereto, and the source-drain metal layer 240 may also have two or more protrusions.

According to an embodiment of the present invention, referring to FIG. 7 , the second substrate 200 may further include a gate metal layer 220 and a first insulating layer 230 . The gate metal layer 220 and the first insulating layer 230 are located on the second substrate 210 and the source-drain metal layer. 240 , the first insulating layer 230 is located on the side close to the source-drain metal layer 240 ;

According to an embodiment of the present invention, referring to FIGS. 3 and 7 , the side of the retaining wall 400 facing the first area A further has a groove G. Therefore, the groove G can increase the resistance of the spacer 300 when sliding in the first area A, further increase the resistance of the spacer 300 sliding out of the blocking wall 400 from the first area A, and further avoid the light leakage problem.

According to an embodiment of the present invention, the distance between the spacer 300 and the retaining wall 400 is greater than 17.2 microns and less than 30 microns. Since the distance between the spacer 300 and the blocking wall 400 is too large or too small, light leakage may be caused. Specifically, if the distance between the spacer 300 and the blocking wall 400 is too small, falling spots may be caused. If the distance between the spacer 300 and the retaining wall 400 is too large, it will cause the pressing to turn green. The distance between the spacer 300 and the blocking wall 400 of the present invention is moderate, which can further avoid the occurrence of the problem of light leakage.

For the convenience of understanding, the relationship between the light leakage problem and the distance between the spacer 300 and the retaining wall 400 is briefly explained here: if the distance between the spacer 300 and the retaining wall 400 is too large, as shown in FIG. 10 , when the display When the panel is pressed and deformed, the retaining wall 400 can play a blocking role. The spacer 300 in FIG. 10 does not slide out of the retaining wall 400, but the spacer 300 has slid far enough, and it is difficult to restore to the original state. position, which exposes the light leakage area, resulting in a green phenomenon under the L0 screen, which is regarded as the product quality is not good enough. If the distance between the spacer 300 and the retaining wall 400 is too small, it will cause drop spots. As shown in FIG. 2 , when the display panel is subjected to a strong impact (such as falling), the spacer 300 has a large displacement and has slipped out of the retaining wall. , when the external force disappears, the spacer 300 is located outside the retaining wall. Due to the large step difference back to the initial position, it cannot return to the initial position, and the light leakage area will be exposed, resulting in a light leakage problem.

It should be understood that FIG. 8 is a schematic structural diagram of the process of returning the spacer 300 to the original position in the present invention. By setting the step S in the present invention, the spacer 300 can finally easily return to the original position shown in FIG. 7 . Location. That is to say, when the distance between the spacer 300 and the retaining wall 400 is too small, although the structure shown in FIG. 8 (with the step S on the second side wall 400b ) can prevent the final spacer 300 from returning to its original position However, if the distance between the spacer 300 and the retaining wall 400 is too small, there will still be adverse effects, and it is still necessary to avoid making the distance between the spacer 300 and the retaining wall 400 too small to further avoid the light leakage problem.

The present invention also provides a display device including the aforementioned display panel. Therefore, the display device has all the features and advantages of the aforementioned display panel, which will not be repeated here.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, only for the purpose of It is convenient to describe the present invention and to simplify the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, it should be noted that in this specification, the terms "first" and "second" are only used for description purposes, and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.

In the description of this specification, reference to the terms "one embodiment", "another embodiment", "some embodiments", "example", "specific example", or "some examples" or the like is meant to be used in conjunction with the description A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limitations to the present application. Embodiments are subject to variations, modifications, substitutions and variations.

Claims (12)

1. A display panel, characterized in that, the display panel comprises a first substrate and a second substrate disposed opposite to each other, and liquid crystal filled between the first substrate and the second substrate; the first substrate and the second substrate; The substrate is provided with a black matrix, a color resist layer and at least one spacer; The second substrate is provided with more than two retaining walls, at least two of the retaining walls define a first area on the second substrate, and a second area adjacent to the first area, so The orthographic projection of the spacer on the second substrate is located in the first region, the orthographic projection of the spacer on the first substrate, and the blocking wall on the first substrate The orthographic projections on the black matrix are all located within the orthographic projection range of the black matrix on the first substrate; In the direction perpendicular to the thickness of the display panel, the cross-sectional shape of the retaining wall is configured such that the resistance of the spacer to slide out from the first area to the second area is greater than that from the spacer The resistance of the second area to slide into the first area. 2 . The display panel according to claim 1 , wherein the retaining wall has a first side wall in a direction from the first area to the second area, and the barrier wall points to the second area from the second area. 3 . In the direction of the first area, the retaining wall has a second side wall, the first side wall has a protrusion facing the side of the second area, and the second side wall has a side facing the second area the depression. 3. The display panel according to claim 2, wherein the first side wall and the second side wall are arc-shaped or wedge-shaped. 4 . The display panel according to claim 3 , wherein the first side wall and the second side wall are both arc-shaped, or the first side wall and the second side wall are both arc-shaped. 5 . is wedge-shaped. 5 . The display panel according to claim 1 , wherein the first substrate further comprises a first substrate and a planarization layer arranged in layers, and the black matrix is located on one surface of the first substrate. 6 . , the color resist layer covers the first substrate and the black matrix, and the planarization layer is located on the side of the color resist layer away from the first substrate; the spacer is disposed on the planarization layer; The second substrate includes a second substrate, a source-drain metal layer and a second insulating layer stacked in sequence, and the barrier wall is formed by at least the source-drain metal layer and the second insulating layer. 6. The display panel according to claim 5, wherein the retaining wall has steps. 7 . The display panel according to claim 6 , wherein the retaining wall has a first side wall in a direction from the first area to the second area, and the barrier wall points to the second area from the second area. 8 . In the direction of the first area, the retaining wall has a second side wall, and the step is located on one side of the second side wall. 8 . The display panel according to claim 6 , wherein the blocking wall is formed by the source-drain metal layer and the second insulating layer, and the source-drain metal layer constituting the blocking wall has at least one bump. 9 . The display panel according to claim 6 , wherein the second substrate further comprises a gate metal layer and a first insulating layer, and the gate metal layer and the first insulating layer are located on the second substrate. 10 . between the bottom and the source-drain metal layer, the first insulating layer is located on a side close to the source-drain metal layer; The retaining wall is composed of the gate metal layer, the first insulating layer, the source-drain metal layer and the second insulating layer. 10 . The display panel according to claim 6 , wherein a side of the blocking wall facing the first area further has a groove. 11 . 11 . The display panel of claim 1 , wherein the distance between the spacer and the retaining wall is greater than 17.2 microns and less than 30 microns. 12 . 12. A display device, comprising the display panel according to any one of claims 1-11.

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