CN113629074B

CN113629074B - Display panel

Info

Publication number: CN113629074B
Application number: CN202110863828.XA
Authority: CN
Inventors: 刘建欣
Original assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-07-29
Anticipated expiration: 2041-07-29
Also published as: CN113629074A

Abstract

The application discloses a display panel, which comprises a substrate, an insulating layer, a first signal wire and a second signal wire, wherein the substrate is provided with a first area and a second area which are adjacently arranged; the insulating layer is arranged on the substrate and is positioned in the first area, a step structure is formed by the insulating layer and the part of the substrate corresponding to the second area, the insulating layer comprises a first surface, and the first surface is positioned at the junction of the first area and the second area; the first signal routing is arranged on the step structure, and the orthographic projection of the plane where the substrate is located is intersected with the orthographic projection of the first surface on the plane where the substrate is located; the second signal wire is arranged on the step structure and is arranged at intervals with the first signal wire, and the orthographic projection of the second signal wire on the plane of the substrate is intersected with the orthographic projection of the first surface on the plane of the substrate; the first surface comprises a concave-convex surface, and the concave-convex surface is positioned between the first signal wire and the second signal wire. This application has reduced the short circuit probability between the metal wiring of height relief juncture.

Description

Display panel

Technical Field

The application relates to the technical field of display, in particular to a display panel.

Background

In display panel, can set up the insulating layer usually and come insulating each layer metal to walk the line, nevertheless because different regions are different to the demand of insulating layer in the panel, can have some regions that need not set up the insulating layer among the display panel, and then lead to display panel to have the relief difference in the region that is equipped with the insulating layer and the region that is not equipped with the insulating layer.

Generally, at the junction between a high-terrain area provided with an insulating layer and a low-terrain area not provided with an insulating layer, there are some metal wires crossing the junction between the high-terrain area and the low-terrain area. However, in a patterning process of metal lines, such as a photolithography process, due to the influence of topography differences, photoresist accumulation may occur at the junction between a high-topography region and a low-topography region, so that metal residues may be generated at the photoresist accumulation position at the junction between the high-topography region and the low-topography region while forming the metal lines, and the residual metal may cause short circuits between adjacent metal lines, thereby reducing the manufacturing yield of the display panel.

Disclosure of Invention

The embodiment of the application provides a display panel to solve the technical problem that short circuit occurs between metal wires at a high-low terrain junction in the prior art.

The embodiment of the present application provides a display panel, the display panel includes:

a substrate having a first region and a second region, the first region and the second region being adjacently disposed;

the insulating layer is arranged on the substrate and is positioned in the first area, a step structure is formed between the insulating layer and the part of the substrate corresponding to the second area, the insulating layer comprises a first surface, and the first surface is positioned at the junction of the first area and the second area;

The first signal routing is arranged on the step structure, and the orthographic projection of the first signal routing on the plane of the substrate is intersected with the orthographic projection of the first surface on the plane of the substrate; and

the second signal routing is arranged on the step structure and is arranged at intervals with the first signal routing, and the orthographic projection of the second signal routing on the plane of the substrate is intersected with the orthographic projection of the first surface on the plane of the substrate;

the first surface comprises a concave-convex surface, and the concave-convex surface is positioned between the first signal trace and the second signal trace.

Optionally, in some embodiments of the present application, the insulating layer further includes a second surface, the second surface is connected to the first surface, the second surface is a surface of the insulating layer away from the substrate, a surface of the substrate close to the insulating layer includes a third surface, the third surface is located in the second region, and the second surface, the first surface and the third surface are connected to form the step structure.

Optionally, in some embodiments of the present application, the concave-convex surface includes a concave surface and an extending surface connected between two adjacent concave surfaces, the concave surface is concavely disposed towards the first region, and a joint of the concave surface and the extending surface is a corner structure.

Optionally, in some embodiments of the present application, the concave surface includes a first concave surface connected to the extended surface on one side of the concave surface to form a first corner structure and a second concave surface connected to the extended surface on the other side of the concave surface to form a second corner structure.

Optionally, in some embodiments of the present application, the concave-convex surface includes a convex surface and an extending surface connected to two of the convex surfaces, the convex surface is convexly disposed to the second region, and the convex surface has a corner structure.

Optionally, in some embodiments of this application, the convex surface includes first convex surface, second convex surface and third convex surface, the second convex surface with one side of first convex surface links to each other, the third convex surface with the opposite side of first convex surface links to each other, the second convex surface with convex surface one side extend the face and link to each other, the third convex surface with the convex surface opposite side extend the face and link to each other, the second convex surface with first convex surface is connected and is formed third corner structure, the third convex surface with first convex surface is connected and is formed fourth corner structure.

Optionally, in some embodiments of the present application, an extending direction of the extending surface intersects an extending direction of the first signal trace.

Optionally, in some embodiments of the present application, the corner structure is a right angle structure or an acute angle structure.

Optionally, in some embodiments of the present application, the display panel further includes a redundant metal line, the redundant metal line is disposed at a junction of the first surface and the second surface and extends along an extending direction of the first surface, an opening for disconnecting the redundant metal line is disposed on the redundant metal line, and the opening corresponds to a region of the corner structure.

Optionally, in some embodiments of the present application, the base plate includes a substrate and a passivation layer disposed on the substrate, the insulating layer is a planarization layer, and the planarization layer and the passivation layer define and form the step structure.

Compare in prior art's display panel, the display panel that this application provided sets up the surface of insulating layer to including a concave-convex face at the juncture in first region and second region, just the concave-convex face is located first signal and is walked between line and the second signal. The design of the concave-convex surface can prolong the flow path of the photoresistance and increase the flow space of the photoresistance, so that the photoresistance used by the photoetching process can flow and disperse along the concave-convex surface in the patterning process of the first signal wiring and the second signal wiring, when the dosage of the photoresistance is constant, the arrangement can reduce the photoresistance accumulation probability at the junction of the first area and the second area, further reduce the thickness of the photoresistance, further reduce the short-circuit probability between the first signal wiring and the second signal wiring and improve the manufacturing yield of the display panel.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic top view of a display panel according to a first embodiment of the present application.

Fig. 2 is a schematic structural diagram of a display panel according to a first embodiment of the present application.

Fig. 3 is a schematic cross-sectional view of the display panel shown in fig. 2 along a sectional line a-a'.

Fig. 4 is a partial enlarged view of the region P in fig. 2.

Fig. 5 is a schematic perspective view of a first corner structure of a display panel according to a first embodiment of the present application.

Fig. 6 is a schematic structural diagram of a display panel according to a second embodiment of the present application.

Fig. 7 is a partially enlarged view of the region Q in fig. 6.

Fig. 8 is a schematic structural diagram of a display panel according to a third embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.

The present application provides a display panel. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.

The application provides a display panel, display panel includes that base plate, insulating layer, first signal walk line and second signal walk the line. The substrate has a first region and a second region. The first region and the second region are disposed adjacent to each other. The insulating layer is arranged on the substrate and is positioned in the first area. The insulating layer and the part of the substrate corresponding to the second area form a step structure. The insulating layer includes a first surface. The first surface is located at an intersection of the first region and the second region. The first signal routing is arranged on the step structure. The orthographic projection of the first signal routing line on the plane of the substrate is intersected with the orthographic projection of the first surface on the plane of the substrate. The second signal routing is arranged on the step structure and is arranged at an interval with the first signal routing. The orthographic projection of the second signal routing wire on the plane of the substrate is intersected with the orthographic projection of the first surface on the plane of the substrate. The first surface comprises a concave-convex surface, and the concave-convex surface is positioned between the first signal routing and the second signal routing.

Therefore, the display panel provided by the application sets the surface of the insulating layer to comprise a concave-convex surface at the junction of the first area and the second area, and the concave-convex surface is positioned between the first signal wiring and the second signal wiring. The design of the concave-convex surface can prolong the flow path of the photoresistance and increase the flow space of the photoresistance, so that in the patterning process of the first signal routing line and the second signal routing line, the photoresistance used by the photoetching process can flow along the concave-convex surface and be dispersed, when the dosage of the photoresistance is constant, the arrangement can reduce the photoresistance accumulation probability at the junction of the first area and the second area, further reduce the thickness of the photoresistance, further reduce the short circuit probability between the first signal routing line and the second signal routing line, and is beneficial to improving the manufacturing yield of the display panel.

The display panel provided by the present application is explained in detail by specific embodiments below.

Referring to fig. 1 to 3, a display panel 100 is provided according to a first embodiment of the present disclosure. The display panel 100 includes a substrate 10, an insulating layer 20, a first signal trace 30 and a second signal trace 40. The substrate 10 has a first region 10a and a second region 10 b. The first region 10a and the second region 10b are disposed adjacently. The insulating layer 20 is disposed on the substrate 10 and located in the first region 10 a. The insulating layer 20 forms a stepped structure 20A with a portion of the substrate 10 corresponding to the second region 10 b. The first signal trace 30 and the second signal trace 40 are disposed on the step structure 20A at an interval.

Specifically, as shown in fig. 1, the display panel 100 includes a display area 100a and a non-display area 100b provided around the display area 100 a. In the present embodiment, the insulating layer 20 is a planarization layer 20. The planarization layer 20 is disposed in the display region 100a and extends into the non-display region 100 b. The first area 10a and the second area 10b are located in the non-display area 100 b. The first region 10a is a planarization region. The second region 10b is a non-planarized region. The boundary between the first region 10a and the second region 10b is the boundary of the planarization layer 20.

It should be noted that, in some embodiments, the insulating layer 20 may also be another organic or inorganic insulating film layer in the display panel 100, which is not limited in this application.

Referring to fig. 2 and 3, the base plate 10 includes a substrate 101, a thin film transistor functional layer 102, and a passivation layer 103, which are sequentially disposed. The planarization layer 20 is disposed on the passivation layer 103. The passivation layer 103 extends from the first region 10a to the second region 10 b. The planarization layer 20 and the passivation layer 103 define a step structure 20A. It should be noted that, the detailed structure of the tft functional layer 102 may refer to the prior art, and is not described herein again.

The insulating layer 20 includes a first surface 201 and a second surface 202. The second surface 202 is connected to the first surface 201. The first surface 201 is located at the intersection of the first region 10a and the second region 10 b. The orthographic projection of the first surface 201 on the plane of the substrate 10 is the boundary of the planarization layer 20. The second surface 202 is a surface of the insulating layer 20 away from the substrate 10. The side of the substrate 10 adjacent to the insulating layer 20 includes a third surface 203. The third surface 203 is located at the second region 10 b. The second surface 202, the first surface 201, and the third surface 203 are connected to form a stepped structure 20A.

In some embodiments, the first surface 201 of the insulating layer 20 may further include a plurality of surfaces connected to each other, so that a plurality of step structures are formed between the insulating layer 20 and the substrate 10, which is not described herein again.

It should be noted that, in the present embodiment, the included angle R between the first surface 201 and the second surface 202 may be an obtuse angle, a right angle, or an acute angle. The present embodiment is described by taking the example that the included angle R between the first surface 201 and the second surface 202 is an acute angle, but is not limited thereto.

In the present embodiment, the first surface 201 includes a concave-convex surface 2011. It should be noted that, in the present application, the concave-convex surface 2011 refers to a structure that is disposed on the first surface 201 as needed, and is different from an uneven state that cannot be avoided in a conventional manufacturing method, and the concave-convex surface 2011 is also different from a via structure that plays a role in connection.

An orthogonal projection of the first signal trace 30 on the plane of the substrate 10 intersects an orthogonal projection of the first surface 201 on the plane of the substrate 10. The orthographic projection of the second signal trace 40 on the plane of the substrate 10 intersects with the orthographic projection of the first surface 201 on the plane of the substrate 10. The concave-convex surface 2011 is located between the first signal trace 30 and the second signal trace 40.

Due to the structural design of the concave-convex surface 2011, the flow path of the photoresist is prolonged, and the flow space of the photoresist can be increased. Therefore, when a metal layer for preparing the first signal trace 30 and the second signal trace 40 is formed on the planarization layer 20, in the patterning process of the metal layer, since the photoresist used in the photolithography process can flow and be dispersed along the concave-convex surface 2011, when the dosage of the photoresist is constant, the thickness of the photoresist at the concave-convex surface 2011 is thinner than that of the photoresist at other regions, and after the exposure, development and etching processes, the probability of metal residue at the concave-convex surface 2011 is reduced, so that the probability of short circuit between the first signal trace 30 and the second signal trace 40 can be reduced.

In the present embodiment, the first signal traces 30 and the second signal traces 40 extend along the first direction X and are arranged at intervals along the second direction Y. In some embodiments, the first signal trace 30 and the second signal trace 40 may also extend along the second direction Y and are spaced along the first direction X. The positions of the first signal trace 30 and the second signal trace 40 are not specifically limited in the present application, and both the first signal trace 30 and the second signal trace 40 are within the protection range of the present application as long as the first signal trace 30 and the second signal trace 40 are ensured to cross the boundary of the first area 10a and the second area 10 b.

The first signal traces 30 and the second signal traces 40 may be data signal lines, scanning signal lines, touch signal lines, VSS signal lines, VDD signal lines, or other traces in the peripheral region of the display panel 100. In addition, the first signal trace 30 and the second signal trace 40 may be traces for transmitting the same signal, or traces for transmitting different signals, which is not limited in this application.

Referring to fig. 2 and 4, the concave-convex surface 2011 includes concave surfaces 2011a and extending surfaces 2011b connected between two adjacent concave surfaces 2011 a. The concave surface 2011a is concavely provided toward the first region 10 a. The junction of the concave surface 2011a and the extended surface 2011b is a corner feature 50. The extending surface 2011b extends along the second direction Y, and the first signal trace 30 extends along the first direction X, that is, the extending direction of the extending surface 2011b intersects with the extending direction of the first signal trace 30.

In this embodiment, the concave surface 2011a is disposed on the concave-convex surface 2011, and the corner structure 50 is formed at the connection position of the concave surface 2011a and the extending surface 2011b, so that the corner structure 50 can extend the flow path of the photoresist, and increase the flowing space of the photoresist, and when the dosage of the photoresist is constant, the thickness of the photoresist at the corner structure 50 is thinner than that of the photoresist at other regions. In the subsequent exposure process, the corner structure 50 is more fully exposed, so as to further reduce the metal residue probability at the corner structure 50, so as to reduce the short circuit probability between the first signal trace 30 and the second signal trace 40.

Between the first signal trace 30 and the second signal trace 40, the number of the concave surfaces 2011a may be one, two or more, and when the distance between the first signal trace 30 and the second signal trace 40 is not changed, the number of the concave surfaces 2011a is larger, the number of the corner structures 50 is larger, the probability of metal residue is smaller, and the probability of short circuit between the first signal trace 30 and the second signal trace 40 is smaller. It should be noted that the present embodiment only illustrates the structure when the number of the concave surfaces 2011a between the first signal trace 30 and the second signal trace 40 is three, but the present embodiment is not limited thereto.

In this embodiment, the corner structure 50 is a right angle structure. Specifically, the cross-sectional shape of the concave surface 2011a may be rectangular, corresponding to a right-angled configuration.

In the photolithography process of the metal layer, the photoresist on the periphery of the right-angle structure will be dispersed and flow in all directions away from the planarization layer 20, so that the photoresist thickness at the right-angle structure is reduced. As shown in fig. 2, in the exposure process, there are three exposure directions x, y and z at the right-angle structure, so that the exposure is more sufficient, and the generation of residual metal at the corner structure 50 can be avoided.

In some embodiments, the corner structure 50 may also be an acute angle structure or an obtuse angle structure. When the corner structure 50 is an acute angle structure, the photoresist thickness at the corner structure 50 can be further thinned, and the exposure sufficiency is further improved, so that the generation of residual metal at the corner structure 50 can be further avoided.

In the present embodiment, the display panel 100 further includes a redundant metal line 60. The redundant metal line 60 is disposed at an intersection of the first surface 201 and the second surface 202, and extends along an extending direction of the first surface 201. An opening 601 for disconnecting the redundant metal line 60 is provided on the redundant metal line 60. The opening 601 corresponds to the area of the corner structure 50.

Since the redundant metal line 60 is disconnected from the corner structure 50, it can be seen that in the present embodiment, the corner structure 50 is disposed between the first signal trace 30 and the second signal trace 40, and then in the patterning process of the first signal trace 30 and the second signal trace 40, the residual metal at the corner structure 50 can be completely removed, so that the first signal trace 30 and the second signal trace 40 can be prevented from being conducted through the redundant metal line 60, a short circuit between the first signal trace 30 and the second signal trace 40 is prevented, and further the manufacturing yield of the display panel 100 can be greatly improved.

With reference to fig. 4 and 5, the concave surface 2011a includes a first concave surface a, a second concave surface b, and a third concave surface c. One side of the third concave surface c is connected with the first concave surface a. The other side of the third concave surface c is connected with the second concave surface b. The first concave surface a is connected to an extended surface 2011b on one side of the concave surface 2011a to form a first corner structure 501. The second concave surface b is connected to an extended surface 2011b on the other side of the concave surface 2011a to form a second corner structure 502. In this embodiment, the first corner structure 501 and the second corner structure 502 are both right-angled structures. In some embodiments, one of the first corner structure 501 and the second corner structure 502 is a right-angle structure, and is not described herein again.

It will be appreciated that in some embodiments, when the corner structure 50 is an acute angle structure or an obtuse angle structure, the concave surface 2011a may include only the first concave surface a and the second concave surface b, and the first concave surface a and the second concave surface b are connected. At this time, the cross-sectional shape of the concave surface 2011a may be triangular.

The display panel 100 in the present application may be a liquid crystal display panel or an organic light emitting diode display panel. When the display panel 100 is a liquid crystal display panel, the display panel 100 may further include a pixel electrode layer, a liquid crystal layer, a color filter substrate, and other structures (not shown in the figure). When the display panel 100 is an organic light emitting diode display panel, the display panel 100 may further include an anode, a pixel defining layer, a light emitting function layer, and an encapsulation layer (not shown).

Referring to fig. 6 and 7, a display panel 100 is provided according to a second embodiment of the present application. The second embodiment of the present application provides a display panel 100 that is different from the first embodiment in that: the concave-convex surface 2011 includes convex surfaces 2011c and extending surfaces 2011b connected to two adjacent convex surfaces 2011c, the convex surfaces 2011c are arranged to protrude toward the second region 10b, and the convex surfaces 2011c have the corner structures 50.

In this embodiment, the convex surface 2011c is disposed on the concave-convex surface 2011, and the corner structure 50 is formed at the connection position of the convex surface 2011c and the extending surface 2011b, so that the corner structure 50 can extend the flow path of the photoresist, and increase the flowing space of the photoresist, and when the dosage of the photoresist is constant, the thickness of the photoresist at the corner structure 50 is thinner than that of the photoresist at other regions. In the subsequent exposure process, the exposure at the corner structure 50 is more sufficient, so that the metal residue probability at the corner structure 50 can be further reduced, so as to reduce the short circuit probability between the first signal trace 30 and the second signal trace 40.

As shown in fig. 7, the convex surface 2011c includes a first convex surface d, a second convex surface e, and a third convex surface f. The second convex surface e is connected to one side of the first convex surface d. The third convex surface f is connected to the other side of the first convex surface d. The second convex surface e is connected to an extended surface 2011b on the side of the convex surface 2011 c. The third convex surface f is connected to the extended surface 2011b on the other side of the convex surface 2011 c. The second convex surface e and the first convex surface d are connected to form a third corner structure 503. The third convex surface f and the first convex surface d are connected to form a fourth corner structure 504.

In this embodiment, the third corner structure 503 and the fourth corner structure 504 are both right-angle structures. In some embodiments, one of the third corner structure 503 and the fourth corner structure 504 is a right-angle structure, and is not described herein again.

Referring to fig. 8, a display panel 100 is provided according to a third embodiment of the present disclosure. The third embodiment of the present application provides a display panel 100 different from the second embodiment in that: the corner structure 50 is an acute angle structure.

When the corner structure 50 is an acute angle structure, when a metal layer for preparing the first signal trace 30 and the second signal trace 40 is formed on the planarization layer 20, in the patterning process of the metal layer, since the photoresist used in the photolithography process can flow and disperse along the circumferential side of the acute angle structure, when the photoresist usage amount is constant, the photoresist thickness of the acute angle structure is thinner than that of the right angle structure, in addition, in the exposure process, the exposure is more sufficient, and further the metal residue at the corner structure 50 can be avoided, so as to avoid the short circuit between the first signal trace 30 and the second signal trace 40.

In this embodiment, the third corner structure 503 and the fourth corner structure 504 are both acute angle structures. Due to the arrangement, the redundant metal line 60 has two openings 601 in one convex surface 2011c, so that a short circuit between the first signal trace 30 and the second signal trace 40 can be further avoided, and the manufacturing yield of the display panel 100 can be greatly improved.

In some embodiments, one of the third corner structure 503 and the fourth corner structure 504 is an acute angle structure and the other is an obtuse angle structure. In addition, in some embodiments, the convex surface 2011c may also include only one of the third corner structure 503 and the fourth corner structure 504, which is not described herein again.

The foregoing detailed description is directed to a display panel provided in an embodiment of the present application, and specific examples are applied herein to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A display panel, comprising:

a base plate having a first region and a second region, the first region and the second region being disposed adjacent to each other, the base plate including a substrate and a passivation layer disposed on the substrate;

the insulating layer is arranged on the substrate and located in the first area, the insulating layer is a planarization layer, a step structure is formed between the insulating layer and the part, corresponding to the second area, of the substrate, the step structure is defined by the planarization layer and the passivation layer, the insulating layer comprises a first surface and a second surface, and the first surface is located at the intersection of the first area and the second area;

The first signal routing is arranged on the step structure, and the orthographic projection of the first signal routing on the plane of the substrate is intersected with the orthographic projection of the first surface on the plane of the substrate;

a second signal trace, disposed on the step structure and spaced apart from the first signal trace, where an orthographic projection of the second signal trace on the plane of the substrate intersects with an orthographic projection of the first surface on the plane of the substrate; and

the redundant metal wire is arranged at the junction of the first surface and the second surface and extends along the extension direction of the first surface, and an opening for disconnecting the redundant metal wire is arranged on the redundant metal wire;

the first surface comprises a concave-convex surface, the concave-convex surface is positioned between the first signal routing and the second signal routing, the concave-convex surface comprises concave surfaces and extending surfaces connected between the two connected concave surfaces, and the joint of the concave surfaces and the extending surfaces is of a corner structure; the opening corresponds to an area of the corner structure.

2. The display panel according to claim 1, wherein the second surface is connected to the first surface, the second surface is a surface of the insulating layer away from the substrate, a surface of the substrate close to the insulating layer includes a third surface, the third surface is located in the second region, and the second surface, the first surface, and the third surface are connected to form the step structure.

3. The display panel according to claim 2, wherein the concave surface is concavely provided toward the first region.

4. The display panel of claim 3, wherein the recessed surfaces comprise a first recessed surface and a second recessed surface, the first recessed surface is connected to the extended surface on one side of the recessed surfaces to form a first corner structure, and the second recessed surface is connected to the extended surface on the other side of the recessed surfaces to form a second corner structure.

5. The display panel according to claim 2, wherein the concave-convex surface comprises a convex surface and an extending surface connected to two adjacent convex surfaces, the convex surface is convexly disposed toward the second region, and the convex surface has a corner structure.

6. The display panel of claim 5, wherein the convex surface comprises a first convex surface, a second convex surface and a third convex surface, the second convex surface is connected to one side of the first convex surface, the third convex surface is connected to the other side of the first convex surface, the second convex surface is connected to the extending surface on one side of the convex surface, the third convex surface is connected to the extending surface on the other side of the convex surface, the second convex surface is connected to the first convex surface to form a third corner structure, and the third convex surface is connected to the first convex surface to form a fourth corner structure.

7. The display panel according to claim 3 or 5, wherein an extending direction of the extending surface intersects with an extending direction of the first signal traces.

8. The display panel according to claim 3 or 5, wherein the corner structure is a right angle structure or an acute angle structure.