Display panel and display device

Abstract

An embodiment of the present application provides a display panel and a display device, wherein the display panel includes a substrate and a fan-out portion, the fan-out portion is arranged in a non-display area, the fan-out portion includes a first signal line, a second signal line and a third signal line that are stacked and insulated, the second signal line and the third signal line are both arranged to at least partially overlap with the first signal line, and the second signal line and the third signal line at least partially overlap, by arranging the third signal line to include a first part and a second part connected to the first part, the spacing between the second part and the substrate is smaller than the spacing between the first part and the substrate, the orthographic projection of the first part on the substrate partially overlaps with the orthographic projection of the second signal line on the substrate, the orthographic projection of the second part on the substrate does not overlap with the second signal line on the substrate, and the line width of the second part is greater than the line width of the first part, thereby improving the phenomenon that the signal lines are easily broken after overlapping.

Description

Technical Field

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

[0002] The application of display panels is becoming more and more popular, and they are commonly used in display devices such as mobile phones, televisions, and computers. In order to meet the high resolution and narrow frame requirements of the display panels, it is usually necessary to compress the size of the bottom frame of the display panel.

[0003] At present, in order to achieve a narrow bezel design, it is necessary to compress the width of the fan-out area of ​​the display panel. The existing fan-out area usually adopts three layers of metal routing or even more layers of overlapping metal routing. After the overlap, the metal routing located on the top layer is higher in elevation. Therefore, when the metal layer is patterned to form the top layer of metal routing, the low-lying area is prone to insufficient light during exposure, resulting in photoresist residue, which leads to the problem of metal residue and ultimately causes abnormal display of the display panel. Summary of the Invention

[0004] Embodiments of the present application provide a display panel and a display device to alleviate the deficiencies in the related art.

[0005] To achieve the above functions, the technical solutions provided in the embodiments of the present application are as follows:

[0006] An embodiment of the present application provides a display panel, comprising a display area and a non-display area disposed on at least one side of the display area; the display panel further comprises:

[0007] substrate;

[0008] a fan-out portion disposed on one side of the substrate, the fan-out portion being located in the non-display area, the fan-out portion comprising a first signal line, a second signal line, and a third signal line that are stacked and insulated, the second signal line and the third signal line being at least partially overlapped with the first signal line, and the second signal line being at least partially overlapped with the third signal line;

[0009] The third signal line includes a first part and a second part connected to the first part, the spacing between the second part and the substrate is smaller than the spacing between the first part and the substrate, the orthographic projection of the first part on the substrate at least partially overlaps with the orthographic projection of the second signal line on the substrate, the orthographic projection of the second part on the substrate does not overlap with the second signal line on the substrate, and the line width of the second part is greater than the line width of the first part.

[0010] Optionally, in one embodiment, there is a first overlapping portion between the orthographic projection of the first part on the substrate and the orthographic projection of the second signal line on the substrate, and there is a second overlapping portion between the orthographic projection of the second part on the substrate and the orthographic projection of the first signal line on the substrate; wherein the area of ​​the second overlapping portion is greater than the area of ​​the first overlapping portion.

[0011] Optionally, in one embodiment, an orthographic projection of the second portion on the substrate overlaps with an orthographic projection of the first signal line on the substrate.

[0012] Optionally, in one embodiment, the first signal line includes a third part and a fourth part connected to the third part, the orthographic projection of the third part on the substrate overlaps with the orthographic projection of the second signal line on the substrate, and the orthographic projection of the fourth part on the substrate does not overlap with the orthographic projection of the second signal line on the substrate; wherein the line width of the fourth part is greater than the line width of the third part.

[0013] Optionally, in one embodiment, there is a third overlapping portion between the orthographic projection of the third part on the substrate and the orthographic projection of the first part on the substrate, and there is a fourth overlapping portion between the orthographic projection of the fourth part on the substrate and the orthographic projection of the second part on the substrate; wherein the area of ​​the fourth overlapping portion is greater than the area of ​​the third overlapping portion.

[0014] Optionally, in one embodiment, a side of the third portion away from the substrate is flush with a side of the fourth portion away from the substrate.

[0015] Optionally, in one embodiment, the second signal line includes a fifth portion and a sixth portion connected to the fifth portion, an orthographic projection of the fifth portion on the substrate at least partially overlaps with an orthographic projection of the first signal line on the substrate, and an orthographic projection of the sixth portion on the substrate does not overlap with the first signal line on the substrate;

[0016] The sixth portion extends from the fifth portion toward a side away from the first signal line, and a line width of the sixth portion is greater than a line width of the fifth portion.

[0017] Optionally, in one embodiment, the line width of the first signal line is greater than the line width of the second signal line.

[0018] Optionally, in one embodiment, the third signal line further includes a connecting portion, the connecting portion is located between the first portion and the second portion, one end of the connecting portion is connected to the first portion, and the other end of the connecting portion is connected to the second portion;

[0019] The connecting portion extends from the second portion toward the first portion, the connecting portion is inclined with respect to the substrate, and the line width of the connecting portion is smaller than the line width of the second portion.

[0020] An embodiment of the present application provides a display device, which includes any of the display panels described above.

[0021] Beneficial effects of the embodiments of the present application: The embodiments of the present application provide a display panel and a display device, wherein the display panel includes a substrate and a fan-out portion, the fan-out portion is located in the non-display area, the fan-out portion includes a first signal line, a second signal line and a third signal line that are stacked and insulated, the second signal line and the third signal line are both at least partially overlapped with the first signal line, and the second signal line at least partially overlaps with the third signal line; by setting the third signal line to include a first part and a second part connected to the first part, the spacing between the second part and the substrate is smaller than the spacing between the first part and the substrate, the orthographic projection of the first part on the substrate partially overlaps with the orthographic projection of the second signal line on the substrate, the orthographic projection of the second part on the substrate does not overlap with the second signal line on the substrate, and the line width of the second part is greater than the line width of the first part, thereby improving the phenomenon that signal lines are easily broken after overlapping. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural diagram of a display panel in the related art;

[0024] Figure 2 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0025] Figure 3 For the embodiment of this application Figure 2 A magnified schematic diagram of the corresponding area A;

[0026] Figure 4 Provided in the embodiments of this application Figure 3 An enlarged schematic diagram of the corresponding fan-out area;

[0027] Figure 5 The embodiments of this application provide Figure 4Schematic diagram of the cross section corresponding to BB';

[0028] Figure 6 For the embodiment of this application Figure 5 A magnified schematic diagram of the corresponding C region;

[0029] Figure 7 For the embodiment of this application Figure 4 Top view of area A1

[0030] Figure 8 This is a schematic diagram of the structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the actual use or working mode of the device, specifically the direction of the drawings in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only, and features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed or detachable connections; mechanical or electrical connections; or communication between them; direct or indirect connections through an intermediate medium; and can refer to internal connectivity between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0034] The disclosure below provides many different embodiments for realizing the different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the present application. In addition, the examples of various specific processes and materials provided in the present application, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0035] It should be noted that, please combine Figure 1 , which is a schematic diagram of the structure of a display panel in the related art. In order to meet the requirements of high resolution and narrow bezel of the existing display panel 1, the wiring in the fan-out area 101 is usually arranged in a manner of overlapping three or more layers of metal wiring to save space. This embodiment is illustrated by taking the existing display panel 1 including a first signal wiring 11, a second signal wiring 12, and a third signal wiring 13 arranged in a stacked manner as an example. However, the third signal wiring 13 located on the top layer after overlapping is at a higher altitude. Therefore, when the metal layer is patterned to form the third signal line, the low-altitude area is easily insufficiently illuminated during exposure, resulting in photoresist residue and thus causing the problem of metal residue.

[0036] The embodiments of the present application provide a display panel and a display device. Detailed descriptions are provided below. It should be noted that the order in which the following embodiments are described does not limit the preferred order of the embodiments.

[0037] Please combine Figure 2 、 Figure 3 、 Figure 4 and Figure 5 ;in, Figure 2 A schematic diagram of the structure of a display panel provided in an embodiment of the present application; Figure 3 For the embodiment of this application Figure 2 A magnified schematic diagram of the corresponding area A; Figure 4 The embodiments of this application provide Figure 3 An enlarged schematic diagram of the corresponding fan-out area; Figure 5 The embodiments of this application provide Figure 4 Schematic diagram of the cross section corresponding to BB'.

[0038] In one embodiment, the display panel 2 includes but is not limited to a liquid crystal display panel, and the display panel 2 includes a display area 201 and a non-display area 202 arranged on at least one side of the display area 201; in this embodiment, the display panel 2 includes a display area 201 and a binding terminal 30 located on one side of the display area 201, and the binding terminal is located in the non-display area 202. The binding terminal 30 can be connected to an external circuit to transmit the signal input by the external circuit to the display panel 2, thereby driving the display panel to display a picture; wherein, the non-display area 202 includes a fan-out area 2021, and the fan-out area 2021 is arranged at one end of the non-display area 202 close to the display area 201.

[0039] The display panel 2 also includes a substrate 21 and a fan-out portion 22; wherein, the substrate 21 may include a rigid substrate 21 or a flexible substrate 21. When the substrate 21 is a rigid substrate, the material may be metal or glass. When the substrate 21 is a flexible substrate, the material may include at least one of acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, polyurethane-based resin, cellulose resin, silicone resin, polyimide-based resin, and polyamide-based resin. This embodiment does not impose specific restrictions on this.

[0040] The fan-out portion 22 is arranged on one side of the substrate 21. The fan-out portion 22 is located in the non-display area 202. The fan-out portion 22 includes a first signal line 221, a second signal line 222 and a third signal line 223 that are stacked and insulated. The second signal line 222 and the third signal line 223 are both arranged to at least partially overlap with the first signal line 221, and the second signal line 222 and the third signal line 223 at least partially overlap.

[0041] Specifically, the fan-out portion 22 is located in the fan-out area 2021, and the display panel 2 includes a first metal layer 2A, a second metal layer 2B and a third metal layer 2C that are stacked in sequence and insulated. The first metal layer 2A includes a plurality of first signal lines 221 spaced apart along the first direction X, the second metal layer 2B includes a plurality of second signal lines 222 spaced apart along the first direction X, and the third metal layer 2C includes a plurality of third signal lines 223 spaced apart along the first direction X. The first signal line 221, the second signal line 222 and the third signal line 223 are arranged correspondingly.

[0042] Among them, the orthographic projection of the first signal line 221 on the substrate 21 partially overlaps with the orthographic projection of the second signal line 222 on the substrate 21, the orthographic projection of the second signal line 222 on the substrate 21 partially overlaps with the orthographic projection of the third signal line 223 on the substrate 21, and the orthographic projection of the first signal line 221 on the substrate 21 partially overlaps with the orthographic projection of the third signal line 223 on the substrate 21, so that more signal lines can be arranged in the same space, so that the area of ​​the non-display area 202 is reduced, which is beneficial to improving the high resolution of the display panel 2 and meeting the design requirements of a narrow frame.

[0043] It should be noted that the display panel 2 also includes a thin film transistor and a storage capacitor, the storage capacitor includes a first electrode and a second electrode, and the thin film transistor includes an active layer, a gate and a source-drain layer; the first signal line 221, the second signal line 222 and the third signal line 223 can be respectively arranged in the same layer as the gate, source-drain layer, first electrode and second electrode of the thin film transistor, so as to avoid adding an additional film layer structure of the display panel 2 and meet the thin design requirements of the display panel 2.

[0044] Specifically, the first metal layer 2A also includes a gate, the second metal layer 2B includes a first plate, and the third metal layer 2C includes a source and drain layer. It can be understood that this embodiment only uses the example that the first metal layer 2A also includes a gate, the second metal layer 2B includes a first plate, and the third metal layer 2C includes a source and drain layer to illustrate the technical solution of the present application. This embodiment does not impose specific restrictions on the positions of the first metal layer 2A, the second metal layer 2B and the third metal layer 2C.

[0045] Please combine Figure 4 、 Figure 5 、 Figure 6 and Figure 7 ;in, Figure 6 For the embodiment of this application Figure 5 A magnified schematic diagram of the corresponding C region; Figure 7 For the embodiment of this application Figure 4 The top view of the A1 area in the figure.

[0046] In one embodiment, the third signal line 223 includes a first part 2231 and a second part 2232 connected to the first part 2231, the spacing between the second part 2232 and the substrate 21 is smaller than the spacing between the first part 2231 and the substrate 21, the orthographic projection of the first part 2231 on the substrate 21 partially overlaps with the orthographic projection of the second signal line 222 on the substrate 21, the orthographic projection of the second part 2232 on the substrate 21 does not overlap with the second signal line 222 on the substrate 21, and the line width d2 of the second part 2232 is greater than the line width d1 of the first part 2231.

[0047] It should be noted that the line width d1 of the first portion 2231 and the line width d2 of the second portion 2232 can be Figure 4 and Figure 5 , the length of the first portion 2231 in the first direction X and the length of the second portion 2232 in the first direction X.

[0048] It can be understood that, in this embodiment, the line width d2 of the second part 2232 is set to be larger than the line width d1 of the first part 2231, so that the line width of the third signal line 223 close to the substrate 21 is larger than the line width of the third signal line 223 away from the substrate 21, thereby reducing the step difference of the third signal line 223 on the second signal line 222, and improving the phenomenon that the third signal line 223 is easily broken after overlapping.

[0049] Please continue to combine Figure 5 、 Figure 6 and Figure 7 ; In one embodiment, there is a first overlapping portion between the orthographic projection of the first portion 2231 on the substrate 21 and the orthographic projection of the second signal line 222 on the substrate 21, and there is a second overlapping portion between the orthographic projection of the second portion 2232 on the substrate 21 and the orthographic projection of the first signal line 221 on the substrate 21; wherein the area of ​​the second overlapping portion is greater than the area of ​​the first overlapping portion; specifically, the orthographic projection of the second portion 2232 on the substrate 21 overlaps with the orthographic projection of the first signal line 221 on the substrate 21.

[0050] It can be understood that in this embodiment, by setting the area of ​​the second overlapping portion to be larger than the area of ​​the first overlapping portion, and then patterning the third metal layer 2C to form the third signal line 223, the width of the third metal layer 2C close to the substrate 21 is greater than the width of the third metal layer 2C away from the substrate 21, so that the light-receiving area of ​​the photoresist coated on the side of the third metal layer 2C close to the substrate 21 will increase, so that it can be completely removed, avoiding the occurrence of photoresist residues, thereby causing the problem of metal residues.

[0051] Please continue to combine Figure 5 and Figure 6 In one embodiment, the display panel 2 further includes a first insulating layer 23 and a second insulating layer 24, wherein the first insulating layer 23 is disposed between the first signal line 221 and the second signal line 222, and the second insulating layer 24 is disposed between the second signal line 222 and the third signal line 223.

[0052] The first insulating layer 23 covers the first metal layer 2A, and the first insulating layer 23 includes a plurality of protruding structures 231 and a plurality of recessed structures 232. The protruding structures 231 and the recessed structures 232 are alternately arranged along the first direction X, wherein one protruding structure 231 is arranged corresponding to one first signal line 221, and the orthographic projection of the protruding structure 231 on the substrate 21 covers the orthographic projection of the first signal line 221 on the substrate 21; and one recessed structure 232 is arranged between two adjacent first signal lines 221, and the orthographic projection of the recessed structure 232 on the substrate 21 does not overlap with the orthographic projection of the first signal line 221 on the substrate 21.

[0053] Specifically, multiple first signal lines 221 are arranged in the same layer and at intervals, and the first insulating layer 23 is arranged on the side of the first signal line 221 away from the substrate 21; wherein the part of the first insulating layer 23 covering the first signal line 221 forms the protruding structure 231 and the recessed structure 232.

[0054] Please continue to combine Figure 4 、 Figure 5 and Figure 6 In one embodiment, the second signal line 222 is provided on a side of the first insulating layer 23 away from the first signal line 221, and the orthographic projection of the second signal line 222 on the substrate 21 partially overlaps with the orthographic projection of the protruding structure 231 on the substrate 21.

[0055] The second insulating layer 24 is arranged on the side of the second signal line 222 away from the first insulating layer 23, and the second insulating layer 24 covers the second metal layer 2B. The second insulating layer 24 includes a plurality of step structures 241, and the step structure 241, the second signal line 222 and the first signal line 221 are arranged correspondingly; wherein the step structure 241 includes an upper step surface 2411 and a lower step surface 2412, the upper step surface 2411 is arranged corresponding to the second signal line 222, and the lower step surface 2412 is arranged corresponding to the first signal line 221.

[0056] Specifically, the orthographic projection of the upper step surface 2411 on the substrate 21 partially overlaps with the orthographic projection of the second signal line 222 on the substrate 21, the orthographic projection of the lower step surface 2412 on the substrate 21 does not overlap with the orthographic projection of the second signal line 222 on the substrate 21, and the portion of the first insulating layer 23 corresponding to the lower step surface 2412 is in direct contact with the protruding structure 231; that is, the portion of the second insulating layer 24 covering the second signal line 222 forms the upper step surface 2411 of the step structure 241, and the portion of the second insulating layer 24 covering the protruding structure 231 forms the lower step surface 2412 of the step structure 241; wherein, the upper step surface 2411 and the lower step surface 2412 are both flat surfaces, and the area of ​​the orthographic projection of the lower step surface 2412 on the substrate 21 is larger than the area of ​​the orthographic projection of the upper step surface 2411 on the substrate 21.

[0057] The third metal layer 2C is arranged on the side of the second insulating layer 24 away from the second metal layer 2B, and the third signal line 223 extends from the upper step surface 2411 toward the direction close to the lower step surface 2412, and the area of ​​the orthographic projection of the third signal line 223 on the upper step surface 2411 is smaller than the area of ​​the orthographic projection of the third signal line 223 on the lower step surface 2412. Therefore, when the third metal layer 2C is formed on the step structure 241, most of the third metal layer 2C can be arranged on the lower step surface 2412, thereby making the area of ​​the orthographic projection of the third signal line 223 on the upper step surface 2411 smaller than the area of ​​the orthographic projection of the third signal line 223 on the lower step surface 2412.

[0058] It can be understood that, in this embodiment, the area of ​​the orthographic projection of the third signal line 223 on the upper step surface 2411 is set to be smaller than the area of ​​the orthographic projection of the third signal line 223 on the lower step surface 2412, that is, the portion of the third metal layer 2C on the upper step surface 2411 is reduced, and the portion of the third metal layer 2C on the lower step surface 2412 is increased, so that the line width d2 of the second portion 2232 is greater than the line width d1 of the first portion 2231. When the third metal layer 2C is patterned to form the third signal line 223, the light-receiving area of ​​the photoresist coated on the lower step surface 2412 will increase, so that it can be completely removed, thereby avoiding the problem that the lower step surface 2412 is easily insufficiently illuminated during exposure due to the higher terrain of the step structure 241, resulting in photoresist residue and thus metal residue.

[0059] Please continue to combine Figure 4 、 Figure 5 and Figure 6 ; In one embodiment, the orthographic projection of the first portion 2231 on the second signal line 222 is located within the second signal line 222, and the orthographic projection of the second portion 2232 on the substrate 21 does not overlap with the orthographic projection of the second signal line 222 on the substrate 21; wherein the orthographic projection of the second portion 2232 on the substrate 21 at least partially overlaps with the orthographic projection of the first signal line 221 on the substrate 21.

[0060] It can be understood that, since the second insulating layer 24 covers the portion of the second signal line 222 to form the upper step surface 2411 of the step structure 241, in this embodiment, the orthographic projection of the first portion 2231 on the second signal line 222 is set to be located within the second signal line 222, and the orthographic projection of the second portion 2232 on the substrate 21 does not overlap with the orthographic projection of the second signal line 222 on the substrate 21, and the line width d2 of the second portion 2232 is greater than the line width d1 of the first portion 2231, thereby In order to reduce the contact area between the third signal line 223 and the upper step surface 2411 and increase the contact area between the third signal line 223 and the lower step surface 2412, when the third metal layer 2C is patterned to form the third signal line 223, the light-receiving area of ​​the photoresist coated on the lower step surface 2412 will increase, so that it can be completely removed, avoiding the problem that the lower step surface 2412 is easily insufficiently exposed to light due to the high terrain of the step structure 241 during exposure, resulting in photoresist residue and thus metal residue.

[0061] Please continue to combine Figure 4 、 Figure 5 、 Figure 6 and Figure 7 In one embodiment, the first signal line 221 includes a third portion 2211 and a fourth portion 2212 connected to the third portion 2211. The orthographic projection of the third portion 2211 on the substrate 21 overlaps with the orthographic projection of the second signal line 222 on the substrate 21, and the orthographic projection of the fourth portion 2212 on the substrate 21 does not overlap with the orthographic projection of the second signal line 222 on the substrate 21. A line width d4 of the fourth portion 2212 is greater than a line width d3 of the third portion 2211.

[0062] It should be noted that the line width of the first signal line 221, the line width of the second signal line 222, the line width d3 of the third portion 2211, and the line width d4 of the fourth portion 2212 can be Figure 4 and Figure 5 , the length of the first signal line 221 in the first direction X, the length of the second signal line 222 in the first direction X, the length of the third portion 2211 in the first direction X, and the length of the fourth portion 2212 in the first direction X.

[0063] Specifically, the line width of the first signal line 221 is greater than the line width of the second signal line 222, the fourth portion 2212 is located on the side of the third portion 2211 away from the second signal line 222, the orthographic projection of the third portion 2211 on the substrate 21 partially overlaps with the orthographic projection of the first portion 2231 on the substrate 21, and the orthographic projection of the third portion 2211 on the substrate 21 does not overlap with the orthographic projection of the second portion 2232 on the substrate 21; the orthographic projection of the fourth portion 2212 on the substrate 21 partially overlaps with the orthographic projection of the first portion 2231 on the substrate 21, and the orthographic projection of the fourth portion 2212 on the substrate 21 overlaps with the orthographic projection of the second portion 2232 on the substrate 21.

[0064] The third part 2211 has a third overlapping portion between its orthographic projection on the substrate 21 and its orthographic projection on the substrate 21, and the fourth part 2212 has a fourth overlapping portion between its orthographic projection on the substrate 21 and its orthographic projection on the substrate 21; wherein the area of ​​the fourth overlapping portion is greater than that of the third overlapping portion.

[0065] It can be understood that, since the protruding structure 231 of the first insulating layer 23 corresponds to the first signal line 221, the portion of the first insulating layer 23 corresponding to the lower step surface 2412 is in direct contact with the protruding structure 231, and in this embodiment, the line width d4 of the fourth portion 2212 of the first signal line 221 is set to be greater than the line width d3 of the third portion 2211 of the first signal line 221, that is, the first signal line 221 is expanded outwardly toward the side away from the second signal line 222, so that the area of ​​the fourth overlapping portion is larger than the line width d3 of the third portion 2211 of the first signal line 221. The area of ​​the third overlapping portion increases the area of ​​the non-contact portion of the raised structure 231 and the second signal line 222, thereby increasing the area of ​​the lower step surface 2412. When the third metal layer 2C is patterned to form the third signal line 223, the light-receiving area of ​​the photoresist coated on the lower step surface 2412 will increase, so that it can be completely removed, avoiding the problem that the lower step surface 2412 is easily insufficiently illuminated during exposure due to the higher terrain of the step structure 241, resulting in photoresist residue and thus metal residue.

[0066] Please continue to combine Figure 4 、 Figure 5 and Figure 6 In one embodiment, the side of the third portion 2211 away from the substrate 21 is flush with the side of the fourth portion 2212 away from the substrate 21, thereby ensuring the consistency of the thickness and structure of the first signal line 221 on the substrate 21, and making the portion of the first insulating layer 23 corresponding to the first signal line 221 relatively flat, which is beneficial to ensuring the overall stability of the third signal line 223 and improving the reliability of the display panel 2.

[0067] Please continue to combine Figure 4 、 Figure 5 and Figure 6 In one embodiment, the third signal line 223 further includes a connecting portion 2233, wherein the connecting portion 2233 is located between the first portion 2231 and the second portion 2232, wherein one end of the connecting portion 2233 is connected to the first portion 2231, and the other end of the connecting portion 2233 is connected to the second portion 2232; wherein the connecting portion 2233 extends from the second portion 2232 toward the direction close to the first portion 2231, and the connecting portion 2233 is inclined to the substrate 21, and the line width of the connecting portion 2233 is smaller than the line width d2 of the second portion 2232.

[0068] It should be noted that the line width of the connecting portion 2233 can be Figure 2 , the length of the connecting portion 2233 in the first direction X.

[0069] Specifically, the step structure 241 also includes a step side surface 2413, which connects the upper step surface 2411 and the lower step surface 2412; the connecting portion 2233 is located on the step side surface 2413; it can be understood that this embodiment reduces the break of the third signal line 223 on the step side surface 2413 by setting the line width of the connecting portion 2233 to be smaller than the line width d2 of the second portion 2232, thereby improving the phenomenon that the third signal line 223 is easily broken after overlapping.

[0070] Please continue to combine Figure 4 、 Figure 5 and Figure 6 In one embodiment, the second signal line 222 includes a fifth portion 2221 and a sixth portion 2222 connected to the fifth portion 2221, the orthographic projection of the fifth portion 2221 on the substrate 21 at least partially overlaps with the orthographic projection of the first signal line 221 on the substrate 21, and the orthographic projection of the sixth portion 2222 on the substrate 21 does not overlap with the first signal line 221 on the substrate 21; wherein, the sixth portion 2222 extends from the fifth portion 2221 to a side away from the first signal line 221, and the line width d6 of the sixth portion 2222 is greater than the line width d5 ​​of the fifth portion 2221.

[0071] It should be noted that the line width d5 ​​of the fifth portion 2221 and the line width d6 of the sixth portion 2222 can be Figure 4 and Figure 5 , the length of the fifth portion 2221 in the first direction X and the length of the sixth portion 2222 in the first direction X.

[0072] Specifically, the sixth part 2222 is located on the side of the fifth part 2221 away from the first signal line 221, the sixth part 2222 covers the side wall of the protruding structure 231, the third part 2211 has a fifth overlapping portion between its orthographic projection on the substrate 21 and its orthographic projection on the substrate 21, the fourth part 2212 has a sixth overlapping portion between its orthographic projection on the substrate 21 and its orthographic projection on the substrate 21, and the area of ​​the fifth overlapping portion is smaller than the area of ​​the sixth overlapping portion.

[0073] It can be understood that since the portion of the first insulating layer 23 corresponding to the lower step surface 2412 is in direct contact with the raised structure 231, this embodiment sets the sixth portion 2222 to extend from the fifth portion 2221 toward the side away from the first signal line 221, and the line width d6 of the sixth portion 2222 is greater than the line width d5 ​​of the fifth portion 2221, that is, the second signal line 222 is expanded toward the side away from the first signal line 221, thereby increasing the area of ​​the portion where the raised structure 231 and the second signal line 222 are not in contact, thereby increasing the area of ​​the lower step surface 2412. When the third metal layer 2C is patterned to form the third signal line 223, the light-receiving area of ​​the photoresist coated on the lower step surface 2412 will increase, so that it can be completely removed, thereby avoiding the problem that the lower step surface 2412 is easily exposed to insufficient light due to the high terrain of the step structure 241, resulting in photoresist residue and metal residue.

[0074] In one embodiment, among two adjacent second signal lines 222 , the spacing between the third signal line 223 and its non-corresponding second signal line 222 , the spacing between adjacent first signal lines 221 , and the length of the first signal line 221 satisfy the following formula: W1 / (L1+W2)≥20%.

[0075] Wherein, W1 is the distance between the third signal line 223 and its non-corresponding second signal line 222 , W2 is the distance between adjacent first signal lines 221 , L1 is the length of the first signal line 221 , and 20% is the transmittance of the display panel 2 .

[0076] It should be noted that in order to increase the area of ​​the display area 201 of the display panel 2, the wires between the display area 201 and the driving circuit area are usually designed to be concentrated toward the driving circuit area with a smaller area, so that the wires located between the two areas are gathered into a fan-shaped structure, which is commonly called the fan-out area (Fan-out); in the actual process, it is necessary to use sealing glue to apply in the fan-out area to fit the array substrate and the color film substrate in the display panel 2. The upper signal line covers the wiring gap of the lower signal line, which reduces the transmittance of the frame sealing glue between the wiring gaps, affecting the curing of the frame sealing glue.

[0077] In this embodiment, by setting the spacing between the third signal line 223 and the second signal line 222 that does not correspond to it in two adjacent second signal lines 222, the spacing between adjacent first signal lines 221, and the length of the first signal line 221 to satisfy the formula W1 / (L1+W2)≥20%, thereby ensuring the transmittance of the frame sealant of the display panel 2 and obtaining a good packaging effect.

[0078] See also Figure 8 , is a structural schematic diagram of the display device provided in an embodiment of the present application.

[0079] This embodiment further provides a display device 3 , which includes the display panel 2 described in any one of the above embodiments.

[0080] It can be understood that the display panel 2 has been described in detail in the above embodiment and will not be repeated here; the display device 3 can also include a shell 3A, which is combined with the display panel 2 as a whole to provide support, fixation and protection for the display panel 2.

[0081] In specific applications, the display device 3 can be at least one of devices with display function, such as a smart phone, a tablet computer, a mobile phone, a video phone, an e-book reader, a desktop computer, a laptop, a netbook, a workstation, a server, a personal digital assistant, a portable media player, an MP3 player, a mobile medical machine, a camera, a game console, a digital camera, a car navigation system, an electronic billboard, an ATM or a wearable device.

[0082] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0083] The above is a detailed introduction to a display panel and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: The display panel includes a display area and a non-display area provided on at least one side of the display area; the display panel further includes: substrate; a fan-out portion disposed on one side of the substrate, the fan-out portion being located in the non-display area, the fan-out portion comprising a first signal line, a second signal line, and a third signal line that are stacked and insulated, the second signal line and the third signal line being at least partially overlapped with the first signal line, and the second signal line being at least partially overlapped with the third signal line; The third signal line includes a first part and a second part connected to the first part, the spacing between the second part and the substrate is smaller than the spacing between the first part and the substrate, the orthographic projection of the first part on the substrate at least partially overlaps with the orthographic projection of the second signal line on the substrate, the orthographic projection of the second part on the substrate does not overlap with the second signal line on the substrate, and the line width of the second part is greater than the line width of the first part.

2. The display panel according to claim 1, wherein: There is a first overlapping portion between the orthographic projection of the first part on the substrate and the orthographic projection of the second signal line on the substrate, and there is a second overlapping portion between the orthographic projection of the second part on the substrate and the orthographic projection of the first signal line on the substrate; wherein the area of ​​the second overlapping portion is greater than the area of ​​the first overlapping portion.

3. The display panel according to claim 2, wherein: An orthographic projection of the second portion on the substrate overlaps with an orthographic projection of the first signal line on the substrate.

4. The display panel according to claim 1, wherein: The first signal line includes a third portion and a fourth portion connected to the third portion, the orthographic projection of the third portion on the substrate overlaps with the orthographic projection of the second signal line on the substrate, and the orthographic projection of the fourth portion on the substrate does not overlap with the orthographic projection of the second signal line on the substrate; wherein the line width of the fourth portion is greater than the line width of the third portion.

5. The display panel according to claim 4, wherein: The third part has a third overlapping portion between its orthographic projection on the substrate and its orthographic projection on the substrate, and the fourth part has a fourth overlapping portion between its orthographic projection on the substrate and its orthographic projection on the substrate; wherein the area of ​​the fourth overlapping portion is greater than that of the third overlapping portion.

6. The display panel according to claim 4, wherein: A side of the third portion away from the substrate is flush with a side of the fourth portion away from the substrate.

7. The display panel according to claim 3, wherein: The second signal line includes a fifth portion and a sixth portion connected to the fifth portion, an orthographic projection of the fifth portion on the substrate at least partially overlaps with an orthographic projection of the first signal line on the substrate, and an orthographic projection of the sixth portion on the substrate does not overlap with the first signal line on the substrate; The sixth portion extends from the fifth portion toward a side away from the first signal line, and a line width of the sixth portion is greater than a line width of the fifth portion.

8. The display panel according to any one of claims 1 to 7, characterized in that: The line width of the first signal line is greater than the line width of the second signal line.

9. The display panel according to any one of claims 1 to 7, wherein: The third signal line further includes a connecting portion, the connecting portion being located between the first portion and the second portion, one end of the connecting portion being connected to the first portion, and the other end of the connecting portion being connected to the second portion; The connecting portion extends from the second portion toward the first portion, the connecting portion is inclined relative to the substrate, and the line width of the connecting portion is smaller than the line width of the second portion.

10. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 9.

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