Display panel and display device

Abstract

The invention relates to a display panel and a display device. The display panel comprises a substrate, a signal line and a retaining wall structure. In the direction perpendicular to the plane where the substrate is located, the signal lines and the retaining wall structures have overlapping areas in the first area, on the plane where the substrate is located, the orthographic projection area of one overlapping area is larger than a * b, a is the width of the signal lines, and b is the width of the retaining wall structures. According to the display panel, by increasing the overlapping area of the signal lines and the retaining wall structures, the probability that the signal lines are broken when crossing the retaining wall structures is reduced, normal signal transmission is guaranteed, and then the functional reliability of the display panel is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] In the related art, a display panel is provided with a retaining wall structure protruding away from the substrate in the non-display area to prevent the overflow of the organic packaging material in the display area and prevent the external water and oxygen from invading the interior of the display panel through the organic packaging material and damaging the internal components. At this time, some signal lines located in the upper layer of the display panel need to cross the retaining wall structure, and the height difference of the retaining wall structure will affect the normal routing of the signal lines. Summary of the invention

[0003] In order to solve the above technical problems, the present disclosure provides a display panel and a display device.

[0004] The present disclosure provides a display panel, comprising: a substrate; a retaining wall structure, located on one side of the substrate; a signal line, located on a side of the retaining wall structure away from the substrate; the display panel comprises a first area, within the first area, the extension direction of the signal line is a first direction, the extension direction of the retaining wall structure is a second direction, and the first direction intersects with the second direction; in a direction perpendicular to the plane where the substrate is located, there is an overlapping area between the signal line and the retaining wall structure within the first area; on the plane where the substrate is located, the orthographic projection area of ​​one of the overlapping areas is greater than a×b, wherein a is the width of the signal line parallel to the plane where the substrate is located and perpendicular to the first direction, and b is the width of the retaining wall structure parallel to the plane where the substrate is located and perpendicular to the second direction.

[0005] Based on the same inventive concept, the present disclosure also provides a display device, comprising any one of the display panels described.

[0006] Compared with the prior art, the technical solution provided by the present disclosure has the following advantages: the display panel provided by the present disclosure increases the overlapping area between the signal line and the retaining wall structure, thereby reducing the probability of signal line disconnection when crossing the retaining wall structure, ensuring normal signal transmission, and thereby improving the functional reliability of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0009] Figure 1 A schematic diagram of a planar structure of a display panel provided in an embodiment of the present disclosure;

[0010] Figure 2 A partial cross-sectional structural schematic diagram of a display panel provided in an embodiment of the present disclosure;

[0011] Figure 3 A partial planar structural schematic diagram of a display panel provided in an embodiment of the present disclosure;

[0012] Figure 4 A partial planar structural schematic diagram of another display panel provided in an embodiment of the present disclosure;

[0013] Figure 5 A partial cross-sectional structural schematic diagram of another display panel provided in an embodiment of the present disclosure;

[0014] Figure 6 A partial planar structural schematic diagram of another display panel provided in an embodiment of the present disclosure;

[0015] Figure 7 A partial cross-sectional structural schematic diagram of another display panel provided in an embodiment of the present disclosure;

[0016] Figure 8 A partial planar structural schematic diagram of another display panel provided in an embodiment of the present disclosure;

[0017] Fig. 9 A partial planar structural schematic diagram of another display panel provided in an embodiment of the present disclosure;

[0018] Fig.10 A partial planar structural schematic diagram of another display panel provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present disclosure, the scheme of the embodiments of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other without conflict.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the embodiments of the present disclosure, but the embodiments of the present disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0021] An embodiment of the present disclosure provides a display panel, such as Figure 1 and Figure 2 As shown, Figure 1 : is a schematic diagram of a planar structure of a display panel. The display panel includes a display area AA and a non-display area NA. The display panel also includes a first area NA1 in the non-display area NA. Figure 2 FIG. 4 is a schematic diagram of a partial cross-sectional structure of the display panel cut along L1 in the first area NA1 .

[0022] like Figure 1 As shown, the display panel includes a driver chip IC located in the non-display area NA, a retaining wall structure 10 located in the non-display area NA, and a signal line 20 located at least partially in the non-display area NA. The signal line 20 crosses the retaining wall structure 10 to connect with the driver chip IC and transmits electrical signals between the driver chip IC.

[0023] like Figure 2 As shown, the display panel includes a substrate 1 and an intermediate structure layer 2 stacked in sequence. The retaining wall structure 10 is located on a side of the intermediate structure layer 2 away from the substrate 1 , and the signal line 20 is located on a side of the retaining wall structure 10 away from the substrate 1 .

[0024] Specifically, the intermediate structure layer 2 located in the display area AA may include a pixel driving circuit located on one side of the substrate 1, and a light-emitting element located on a side of the pixel driving circuit away from the substrate 1. The pixel driving circuit is electrically connected to the light-emitting element and drives the light-emitting element to emit light, so that the display panel displays the picture. The intermediate structure layer 2 located in the non-display area NA may include a shift register circuit located on one side of the substrate 1, and the shift register circuit and the pixel driving circuit are arranged on the same layer; or, the intermediate structure layer 2 located in the non-display area NA may also only include various insulating layers, planarization layers, etc. The specific structure of the intermediate structure layer 2 does not affect the retaining wall structure 10 and the signal line 20 arranged thereon, and is not further limited here.

[0025] Specifically, Figure 2 As shown, the retaining wall structure 10 is a structure protruding in a direction away from the substrate 1, and is used to block the overflow of the organic packaging material in the display area AA, thereby preventing external water and oxygen from invading the interior of the display panel through the organic packaging material and damaging internal devices.

[0026] Specifically, Figure 1 and Figure 2As shown, the display panel includes a functional layer 3. In the display area AA, the functional layer 3 is located on the side of the intermediate structure layer 2 away from the substrate 1, and includes a conductive structure 21; in the non-display area NA, the functional layer 3 is located on the side of the intermediate structure layer 2 and the retaining wall structure 10 away from the substrate 1, and includes the above-mentioned signal line 20, and the signal line 20 is electrically connected to the conductive structure 21. The conductive structure 21 conducts electrical signals to the driver chip IC via the signal line 20 to realize the corresponding function of the display panel.

[0027] like Figure 2 As shown, when the signal line 20 crosses the retaining wall structure 10, it needs to climb a greater height (compared to the thickness of the signal line 20 itself), and the metal material of the signal line 20 may be disconnected at the position of the retaining wall structure 10, that is, the signal line 20 may have poor contact or broken wires when climbing, affecting the signal transmission between the conductive structure 21 and the driver chip IC, and further causing the corresponding functions of the display panel to become abnormal.

[0028] In view of this, an embodiment of the present disclosure provides a display panel, such as Figures 1 to 4 As shown, it includes the above-mentioned substrate 1, a retaining wall structure 10 located on one side of the substrate 1, and a signal line 20 located on a side of the retaining wall structure 10 away from the substrate 1.

[0029] The display panel includes a first area NA1, Figure 3 and Figure 4 The enlarged views are respectively partial views of the first area NA1 in two embodiments. In the first area NA1, the extension direction of the signal line 20 is the first direction y1, and the extension direction of the retaining wall structure 10 is the second direction x1, and the first direction y1 intersects the second direction x1.

[0030] In the direction z perpendicular to the plane where the substrate 1 is located, the signal line 20 and the retaining wall structure 10 have an overlapping area S in the first area NA1; on the plane where the substrate 1 is located, the orthographic projection area of ​​an overlapping area S is greater than a×b, wherein a is the width of the signal line 20 parallel to the plane where the substrate 1 is located and perpendicular to the first direction y1, and b is the width of the retaining wall structure 10 parallel to the plane where the substrate 1 is located and perpendicular to the second direction x1.

[0031] In the related art, the angle between the signal line 20 and the retaining wall structure 10 (i.e., the angle between the first direction y1 and the second direction x1) is 90°. Correspondingly, in the related art, the area of ​​the overlapping region S between the signal line 20 and the retaining wall structure 10 is the area of ​​a rectangle with a length of a and a width of b, i.e., a×b. However, the embodiment of the present disclosure reduces the probability of disconnection of the signal line 20 when crossing the retaining wall structure 10 by increasing the overlapping area between the signal line 20 and the retaining wall structure 10 (i.e., making the orthographic projection area of ​​the overlapping region S greater than a×b), thereby ensuring normal signal transmission and improving the functional reliability of the display panel.

[0032] Specifically, the present disclosure provides two embodiments to achieve the above-mentioned overlap region S having a positive projection area greater than a×b. Figure 3 As shown in FIG. 1 , the area of ​​the overlapping region S is increased by adding a protrusion 12 at the overlapping portion between the retaining wall structure 10 and the signal line 20. Figure 4 As shown, by making the angle α1 between the signal line 20 and the retaining wall structure 10 (i.e., the angle between the first direction y1 and the second direction x1) less than 90° (all angles between two directions in the disclosed embodiment refer to acute angles, which will not be repeated), the positive projection of the overlapping area S is a parallelogram, the height of the parallelogram is equal to the width b of the retaining wall structure 10, and the length c of the base of the parallelogram is greater than the width a of the signal line 20 (the hypotenuse of a right triangle is longer than the right angle side), so that the area of ​​the overlapping area S is b×c, which is greater than b×a. In the following embodiments, it will be further described respectively. Figure 3 and Figure 4 The embodiments of the present invention are described in detail here.

[0033] from Figure 3 and Figure 4 It can be seen from the embodiments that the embodiments disclosed herein do not need to reduce the height of the retaining wall structure 10 in the direction z perpendicular to the plane of the substrate 1 to ensure the packaging performance of the display panel; and the embodiments disclosed herein do not need to increase the width of the signal line 20, thereby saving the wiring area of ​​the display panel.

[0034] Specifically, in some embodiments, the width a of the signal line 20 parallel to the plane of the substrate 1 and perpendicular to the first direction y1 is greater than or equal to 3 microns and less than or equal to 50 microns, that is, the width of the signal line 20 in the disclosed embodiment can be compressed to 3 microns, and the problem of broken wires is less likely to occur, further saving the wiring area of ​​the display panel.

[0035] Specifically, Figure 5 Shows Figure 3 The cross-sectional view cut along L2 in the embodiment (herein Figure 3 For example, those skilled in the art can Figure 4 Corresponding embodiment in the embodiment Figure 5In some embodiments, as Figure 5 As shown, in the direction z perpendicular to the plane where the substrate 1 is located, the height h of the retaining wall structure 10 in the overlapping area S is flush with the height h not in the overlapping area S, that is, the embodiment of the present disclosure does not need to reduce the height of the retaining wall structure 10 in the direction z perpendicular to the plane where the substrate 1 is located, so as to ensure the packaging performance of the display panel.

[0036] In one embodiment, if Figure 1 and Figure 2 As shown, the display panel includes a display area AA and a non-display area NA, the retaining wall structure 10 is located in the non-display area NA, and the signal line 20 is at least partially located in the non-display area NA; the display panel also includes a touch electrode in the display area AA, and the signal line 20 is electrically connected to the touch electrode.

[0037] Specifically, the functional layer 3 is a touch layer, and the conductive structure 21 is a touch electrode. In the display area AA, the touch layer is located on the side of the intermediate structure layer 2 away from the substrate 1, and includes a touch electrode; in the non-display area NA, the touch layer is located on the side of the intermediate structure layer 2 and the retaining wall structure 10 away from the substrate 1, and includes the signal line 20, and the signal line 20 is electrically connected to the touch electrode. In the direction z perpendicular to the plane where the substrate 1 is located, the two touch electrodes are separated by an insulating layer, and a capacitor structure is formed, thereby forming a capacitive touch layer. When the user's finger touches the display panel of the electronic device, the charge will be conducted from one touch electrode to another touch electrode, thereby changing the capacitance between the two electrodes. The change in capacitance is transmitted to the driver chip IC through the signal line 20, and then the driver chip IC can obtain the touch information of the display panel and realize the touch function.

[0038] If the signal line 20 has a poor contact or a disconnection problem when climbing, it will affect the signal transmission between the touch electrode and the driving chip IC, thereby causing the touch function of the display panel to be abnormal.

[0039] The embodiment of the present disclosure increases the overlapping area between the signal line 20 and the retaining wall structure 10 to reduce the probability of disconnection of the signal line 20 when crossing the retaining wall structure 10, thereby ensuring normal transmission of the touch signal and improving the reliability of the touch function of the display panel.

[0040] In some embodiments, on the plane where the substrate is located, the orthographic projection of the overlapping area S includes a first edge, the extension direction of the first edge intersects with the first direction y1, that is, the extension direction of the first edge intersects with the extension direction of the signal line 20, and the length of the first edge is greater than a.

[0041] In the related art, the angle between the signal line 20 and the retaining wall structure 10 (i.e., the angle between the first direction y1 and the second direction x1) is 90°. Correspondingly, the overlapping area S between the signal line 20 and the retaining wall structure 10 in the related art is a rectangle with a length of a and a width of b, and the length of the corresponding first edge is the width a of the signal line 20. The disclosed embodiment increases the width of the junction between the signal line 20 and the retaining wall structure 10, thereby reducing the probability of disconnection of the signal line 20 when crossing the retaining wall structure 10, ensuring normal signal transmission, and thus improving the functional reliability of the display panel.

[0042] Specifically, Figure 4 As shown, when the angle α1 between the signal line 20 and the retaining wall structure 10 (i.e., the angle between the first direction y1 and the second direction x1) is less than 90°, the positive projection of the overlapping area S is a parallelogram, the bottom side of the parallelogram is the first edge, and its length is equal to c and greater than a. Alternatively, in another method based on Figure 3 In the embodiment shown, Figure 6 As shown, the orthographic projection of the protruding portion 12 of the retaining wall structure 10 on the plane where the base plate 1 is located is a triangle, and the first edge mentioned above coincides with the longest side of the triangle.

[0043] In a specific embodiment, Figure 3 As shown, the retaining wall structure 10 includes a main body 11 and a protruding portion 12, the protruding portion 12 is located on at least one side of the main body 11 parallel to the plane where the substrate 1 is located and perpendicular to the second direction x1, and b is the width of the main body 11 parallel to the plane where the substrate 1 is located and perpendicular to the second direction x1. In the direction z perpendicular to the plane where the substrate 1 is located, the protruding portion 12 and the main body 11 at least partially overlap with the signal line 20 in the first area NA1.

[0044] The embodiment of the present disclosure increases the overlapping area between the signal line 20 and the retaining wall structure 10 (i.e., the orthographic projection area of ​​the overlapping area S is made larger than a×b) by setting the protrusion 12, thereby reducing the probability of the signal line 20 being disconnected when crossing the retaining wall structure 10, ensuring normal signal transmission, and further improving the functional reliability of the display panel.

[0045] Specifically, in Figure 3 In the illustrated embodiment, the included angle between the signal line 20 and the retaining wall structure 10 (ie, the included angle between the first direction y1 and the second direction x1) may be 90°.

[0046] In a specific embodiment, Figure 6As shown, on the plane where the substrate 1 is located, the shape of the orthographic projection of the protrusion 12 is a triangle. The triangle includes a first side, a second side and a third side, and the third side is the longest side of the triangle. The extension direction of the first side is parallel to the second direction x1, the extension direction of the second side is parallel to the first direction y1, and the extension direction of the third side intersects the first direction y1, that is, the intersection of the signal line 20 and the retaining wall structure 10 is the longest side of the triangle.

[0047] The above-mentioned embodiment of the present disclosure increases the width of the junction between the signal line 20 and the retaining wall structure 10 to reduce the probability of the signal line 20 being disconnected when crossing the retaining wall structure 10, thereby ensuring normal signal transmission and further improving the functional reliability of the display panel.

[0048] In some embodiments, Figure 6 As shown, the included angle α2 between the first side and the third side is greater than or equal to 25° and less than or equal to 75°, thereby making the length of the third side moderate, further preventing the signal line 20 from being broken when crossing the retaining wall structure 10 .

[0049] When implementing it, Figure 2 As shown, the acute angle of the angle between the side wall of the retaining wall structure 10 and the plane where the substrate 1 is located is called the etching angle β, and the etching angle is generated during the generation and etching process of the retaining wall structure 10. In a specific embodiment, the angle of the etching angle β of the retaining wall structure 10 in the overlapping area S is smaller than the angle of the etching angle β of the retaining wall structure 10 not in the overlapping area S, which is equivalent to setting a "gentle slope" at the climbing position of the signal line 20, thereby reducing the probability of the signal line 20 being broken when crossing the retaining wall structure 10.

[0050] Specifically, the above-mentioned “gentle slope” can be realized by the above-mentioned protrusion 12. Figure 7 As shown, Figure 1 for Figure 6 In the schematic diagram of the cross-sectional structure of the display panel cut along L3 in the illustrated embodiment, β1 can be regarded as the etching angle of the retaining wall structure 10 that is not in the overlapping area S, and β2 is the etching angle of the protrusion 12 in the retaining wall structure 10 in the overlapping area S.

[0051] In a specific embodiment, Figure 8 As shown, the protrusions 12 may include gaps 13, and the width of the gaps 13 in the second direction x1 ranges from 1 micron to 2 microns. The gaps 13 can further improve the etching angle of the protrusions 12 at the overlapping area S, further reducing the probability of the signal line 20 being broken when crossing the retaining wall structure 10.

[0052] In some embodiments, Fig. 9As shown, the retaining wall structure 10 includes a first retaining wall structure 101 and a second retaining wall structure 102 , and an extending direction of the first retaining wall structure 101 is parallel to an extending direction of the second retaining wall structure 102 .

[0053] The first retaining wall structure 101 includes a first protruding portion 1201 close to one side of the second retaining wall structure 102, and the second retaining wall structure 102 includes a second protruding portion 1202 close to one side of the first retaining wall structure 101. The first protruding portion 1201 is connected to the second protruding portion 1202, and the connected portion can be regarded as an integral bridge structure 120. When the display panel includes multiple retaining wall structures, the bridge structure 120 can prevent the signal line 20 from climbing multiple times, thereby fundamentally avoiding the problem of the signal line 20 being disconnected when climbing.

[0054] It is understandable that the above embodiments of the present disclosure are only exemplary. In specific implementations, the display panel may further include a greater number of retaining wall structures. Fig. 9 In embodiments other than the illustrated embodiment, the display panel may also include only one retaining wall structure 10 , all of which are within the protection scope of the present disclosure.

[0055] In some embodiments, Figure 4 As shown, the included angle α1 between the first direction y1 and the second direction x1 is less than 90°.

[0056] By making the angle α1 between the signal line 20 and the retaining wall structure 10 (i.e., the angle between the first direction y1 and the second direction x1) less than 90°, the positive projection of the overlapping area S is a parallelogram, the height of which is equal to the width b of the retaining wall structure 10, and the length c of the base of the parallelogram is greater than the width a of the signal line 20 (the hypotenuse of a right triangle is longer than the right angle side), and thus the area of ​​the overlapping area S is b×c, which is greater than b×a. The above-mentioned embodiment of the present disclosure increases the overlapping area between the signal line 20 and the retaining wall structure 10, reduces the probability of the signal line 20 being disconnected when crossing the retaining wall structure 10, ensures normal signal transmission, and thus improves the functional reliability of the display panel.

[0057] In some embodiments, the angle α1 between the first direction y1 and the second direction x1 is greater than or equal to 30°, so as to prevent the signal line 20 from being inclined at too large an angle and occupying the wiring space of the display panel.

[0058] In some embodiments, Fig.10 As shown, the display panel further includes a second area NA2, the second area NA2 is adjacent to the first area NA1, in the second area NA2, the extension direction of the signal line 20 is the third direction y2, the first direction y1 and the second direction x1 both intersect the third direction y2. The angle θ between the third direction y2 and the second direction x1 is greater than the angle α1 between the first direction y1 and the second direction x1.

[0059] The above embodiment is equivalent to that only the signal line 20 is tilted when crossing the retaining wall structure 10 . When there is no need to cross the retaining wall structure 10 , a conventional routing method can be used to further save the wiring space of the display panel.

[0060] During specific implementation, the angle θ between the third direction y2 and the second direction x1 may be 90°.

[0061] It is understandable that those skilled in the art can combine multiple embodiments based on the above embodiments, for example, Figure 3 and Figure 4 By combining the embodiments shown, an embodiment in which the retaining wall structure 10 is provided with a protrusion 12 and the signal line 20 is inclined is obtained, which is also within the protection scope of the present disclosure.

[0062] Based on the same inventive concept, corresponding to the display panel in any of the above embodiments, the present application also provides a display device, which includes the display panel in any of the above embodiments.

[0063] The display panel in the display device provided by the embodiment of the present disclosure increases the overlapping area between the signal line and the retaining wall structure, reduces the probability of the signal line being disconnected when crossing the retaining wall structure, ensures normal signal transmission, and thus improves the functional reliability of the display panel.

[0064] The display device provided in the embodiments of the present disclosure may be an electronic device including a display panel, such as a mobile phone, a smart watch, a tablet computer, a laptop computer, a desktop computer, and a television.

[0065] The method of the above embodiment includes realizing the corresponding display panel in any of the above embodiments, and has the beneficial effects of the corresponding display panel embodiment, which will not be described in detail here.

[0066] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including a..." do not exclude the existence of other identical elements in the process, method, article or device including the above elements.

[0067] The above are only specific embodiments of the present disclosure, which enable those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described above, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: include: substrate; A retaining wall structure, located on one side of the base plate; A signal line, located at a side of the retaining wall structure away from the substrate; The display panel includes a first area, in which the signal line extends in a first direction, the retaining wall structure extends in a second direction, and the first direction intersects with the second direction; In a direction perpendicular to the plane where the substrate is located, there is an overlapping area between the signal line and the retaining wall structure within the first area; on the plane where the substrate is located, the orthographic projection area of ​​one of the overlapping areas is greater than a×b, wherein a is the width of the signal line parallel to the plane where the substrate is located and perpendicular to the first direction, and b is the width of the retaining wall structure parallel to the plane where the substrate is located and perpendicular to the second direction.

2. The display panel according to claim 1, characterized in that: On the plane where the substrate is located, the orthographic projection of the overlapping area includes a first edge, an extension direction of the first edge intersects with the first direction, and a length of the first edge is greater than a.

3. The display panel according to claim 1, characterized in that: The retaining wall structure comprises a main body and a protruding portion, wherein the protruding portion is located on at least one side of the main body parallel to the plane where the substrate is located and perpendicular to the second direction, and b is the width of the main body parallel to the plane where the substrate is located and perpendicular to the second direction; In a direction perpendicular to the plane where the substrate is located, the protruding portion and the main body portion at least partially overlap with the signal line in the first region.

4. The display panel according to claim 3, characterized in that: On the plane where the substrate is located, the shape of the orthographic projection of the protrusion is a triangle; The triangle comprises a first side, a second side and a third side, and the third side is the longest side of the triangle; An extending direction of the first side is parallel to the second direction, an extending direction of the second side is parallel to the first direction, and an extending direction of the third side intersects with the first direction.

5. The display panel according to claim 4, characterized in that: An included angle between the first side and the third side is greater than or equal to 25° and less than or equal to 75°.

6. The display panel according to claim 3, characterized in that: The retaining wall structure comprises a first retaining wall structure and a second retaining wall structure, and the extension direction of the first retaining wall structure is parallel to the extension direction of the second retaining wall structure; The first retaining wall structure includes a first protruding portion close to one side of the second retaining wall structure, the second retaining wall structure includes a second protruding portion close to one side of the first retaining wall structure, and the first protruding portion is connected to the second protruding portion.

7. The display panel according to claim 1, characterized in that: An included angle between the first direction and the second direction is less than 90°.

8. The display panel according to claim 7, characterized in that: An included angle between the first direction and the second direction is greater than or equal to 30°.

9. The display panel according to claim 7, characterized in that: Also included is a second region, in which the signal line extends in a third direction, and both the first direction and the second direction intersect with the third direction; An angle between the third direction and the second direction is greater than an angle between the first direction and the second direction.

10. The display panel according to claim 1, characterized in that: It comprises a display area and a non-display area, the retaining wall structure is located in the non-display area, and the signal line is at least partially located in the non-display area; The display panel further includes a touch electrode in the display area, and the signal line is electrically connected to the touch electrode.

11. The display panel according to claim 1, characterized in that: a is greater than or equal to 3 microns and less than or equal to 50 microns.

12. The display panel according to claim 1, characterized in that: In a direction perpendicular to the plane where the substrate is located, the height of the retaining wall structure in the overlapping area is flush with the height of the retaining wall structure not in the overlapping area.

13. A display device, characterized in that: A display panel comprising any one of claims 1 to 12.

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