CN118865814A

CN118865814A - Display panel and display device

Info

Publication number: CN118865814A
Application number: CN202410902706.0A
Authority: CN
Inventors: 乔盼盼; 郭升; 高琳华; 田苗苗; 马志丽
Original assignee: Yungu Guan Technology Co Ltd
Current assignee: Suzhou Guoxian Innovation Technology Co ltd
Priority date: 2024-07-05
Filing date: 2024-07-05
Publication date: 2024-10-29
Anticipated expiration: 2044-07-05

Abstract

The invention discloses a display panel and a display device. The display panel includes a display area and a non-display area surrounding the display area; in the second direction, the area of the non-display area on one side of the display area comprises a first area, a second area and a third area which are sequentially arranged along the first direction, wherein the first area is provided with a first signal line, and the third area is provided with a second signal line; the display panel further includes: a substrate; the signal transmission layer is arranged on one side of the substrate and used for forming a first signal line and/or a second signal line; the insulating layer is at least partially arranged on one side of the signal transmission layer, which is away from the substrate, and the edge of the insulating layer extending from the display area to the second area is positioned on one side of the insulating layer, which is close to the display area, from the display area to the edge of the third area along the second direction; wherein the first direction intersects the second direction. The narrow frame of the display panel is facilitated.

Description

Display panel and display device

Technical Field

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

Background

In the display panel industry, a narrow bezel is considered as a design element that is positively correlated with the user experience, i.e., the narrower the bezel, the higher the screen ratio of the display panel, and the higher the visual impact. In the prior art, the frame of the display panel is wider, and the requirements of users cannot be met.

Disclosure of Invention

The invention provides a display panel and a display device, which are beneficial to realizing a narrow frame of the display panel.

In a first aspect, an embodiment of the present invention provides a display panel, including a display area and a non-display area surrounding the display area; in the second direction, the area of the non-display area on one side of the display area comprises a first area, a second area and a third area which are sequentially arranged along the first direction, wherein the first area is provided with a first signal line, and the third area is provided with a second signal line; the display panel further includes:

A substrate;

The signal transmission layer is arranged on one side of the substrate and used for forming the first signal line and/or the second signal line;

the insulating layer is at least partially arranged on one side of the signal transmission layer, which is away from the substrate, and the edge of the insulating layer extending from the display area to the second area is positioned on one side of the insulating layer, which is close to the display area, from the edge of the display area to the third area along the second direction; wherein the first direction intersects the second direction.

Optionally, the display panel further includes a conductive layer, where the conductive layer is disposed on a side of the insulating layer facing away from the substrate, and the conductive layer extends from the display area to the non-display area; the edge of the insulating layer extending from the display area to the third area is positioned at one side of the edge of the conductive layer away from the display area;

Preferably, the edge of the insulating layer extending from the display region to the first region is located on a side of the edge of the conductive layer away from the display region;

preferably, the conductive layer includes a cathode layer for forming a cathode of the light emitting device in the subpixel.

Preferably, the edge of the second insulating layer extending from the display region to the second region is located at a side of the second insulating layer extending from the display region to the first region near the display region.

In a second aspect, an embodiment of the present invention further provides a display panel, including a display area and a non-display area surrounding the display area; in the second direction, the area of the non-display area on one side of the display area comprises a wiring area and a second area which are arranged along the first direction, and the display panel also comprises a signal line; the signal wire is positioned in the wiring area and is positioned outside the second area; the display panel further includes:

A substrate;

The signal transmission layer is arranged on one side of the substrate, and at least part of the signal transmission layer is used for forming the signal line;

The insulating layer is at least partially arranged on one side of the signal transmission layer, which is away from the substrate, and the edge of the insulating layer extending from the display area to the second area is positioned on one side of the insulating layer, which is close to the display area, from the display area to the edge of the routing area along the second direction; wherein the first direction intersects the second direction; the vertical projection of the edge of the insulating layer extending from the display area to the wiring area on the substrate overlaps with the vertical projection of the signal line on the substrate;

And the conducting layer is arranged on the surface of the insulating layer, which is away from the substrate.

Optionally, the routing area includes a first area and a third area, and the first area, the second area and the third area are arranged along the first direction; the edge of the insulating layer extending from the display area to the second area is positioned at one side of the insulating layer extending from the display area to the third area and close to the display area, and/or the edge of the insulating layer extending from the display area to the second area is positioned at one side of the insulating layer extending from the display area to the first area and close to the display area;

preferably, the conductive layer includes a cathode layer.

In a third aspect, an embodiment of the present invention further provides a display device, including the display panel in the first aspect and the second aspect.

According to the technical scheme, the edge of the insulating layer extending from the display area to the second area is located at one side of the insulating layer extending from the display area to the third area and close to the display area along the second direction, so that the width of a leveling area formed by the insulating layer at one side of the edge of the second area far from the display area is larger than that of a leveling area formed by the insulating layer at one side of the edge of the third area far from the display area. At this time, a gap between the first signal line and the second signal line along the first direction can be used to form a part of leveling region, so that the width of the leveling region formed on one side of the edge of the third region, far away from the display region, of the insulating layer can be compressed, and the narrow frame design of the display panel can be realized. Meanwhile, the width of the leveling region formed on the side, far away from the display region, of the edge of the second region of the insulating layer is larger, the overflow edge of the organic packaging material is monitored through the leveling region formed on the side, far away from the display region, of the edge of the second region of the insulating layer, the monitoring effectiveness of the overflow edge of the organic packaging material is guaranteed, and therefore the packaging effectiveness of the display panel can be guaranteed. And there are no first signal line and second signal line in the second district, when the display panel is provided with the cathode layer, avoid first signal line and second signal line to short circuit with the cathode layer, have guaranteed the reliability of the display panel.

Drawings

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

FIG. 2 is a partial schematic view of a region C of the display panel provided in FIG. 1;

FIG. 3 is a schematic cross-sectional view of the display panel shown in FIG. 2 along AA';

FIG. 4 is a schematic diagram of a display panel according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a portion of another display panel according to an embodiment of the invention;

FIG. 6 is a schematic diagram of a portion of another display panel according to an embodiment of the invention;

FIG. 7 is a schematic diagram of a portion of another display panel according to an embodiment of the invention;

FIG. 8 is a schematic cross-sectional view of a display panel according to another embodiment of the invention;

FIG. 9 is a schematic diagram of a portion of another display panel according to an embodiment of the invention;

Fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

The display panel may include a display area and a non-display area disposed around the display area. The display panel further includes an array substrate and a light emitting unit. In the display area, the light emitting unit is arranged on the array substrate and used for realizing the display of the display panel. The display panel further comprises a packaging layer, wherein the packaging layer is arranged on one side, far away from the array substrate, of the light-emitting unit, is used for covering the display area and extends to the non-display area, is used for packaging the light-emitting unit, and improves the service life of the light-emitting unit. The encapsulation layer may be a laminate structure of an inorganic encapsulation layer-an organic encapsulation layer-an inorganic encapsulation layer. The non-display area may be provided with a dam having a leveling area on a side of the dam adjacent to the display area. When the organic encapsulation layer is formed, the organic encapsulation material overflows from the display region to the leveling region and is blocked by the bank to form the organic encapsulation layer. The display area points to the direction of the non-display area, the width of the leveling area needs to be large enough to ensure that the overflow edge of the organic packaging material can be monitored, so that the overflow edge position of the organic packaging material is controlled, the situation that the organic packaging material does not flow to a dam is avoided, the surface of one side of the dam, which is close to the display area, is uneven, and the metal on the dam is in a short-circuit state, so that an automatic optical detection (Automated Optical Inspection, AOI) exposure point is caused. Meanwhile, the phenomenon that the organic packaging material overflows out of the dam to cause packaging failure can be avoided. The width requirement of the leveling region is unfavorable for realizing the narrow frame design of the display panel.

In view of the above technical problems, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, fig. 2 is a partial schematic structural diagram of a region C of the display panel provided in fig. 1, and fig. 3 is a schematic sectional structural diagram of the display panel provided in fig. 2 obtained by cutting along AA'. As shown in fig. 1 to 3, the display panel includes a display area AA and a non-display area NAA surrounding the display area AA; in the second direction Y, the area of the non-display area NAA on the display area AA side includes a first area S1, a second area S2, and a third area S3 sequentially arranged along the first direction X, the first area S1 being provided with a first signal line L1, and the third area S3 being provided with a second signal line L2; the display panel further includes:

a substrate 10;

A signal transmission layer 20 disposed on one side of the substrate 10 for forming a first signal line L1 and/or a second signal line L2;

The insulating layer 30, at least part of the insulating layer 30 is disposed on a side of the signal transmission layer 20 away from the substrate 10, and along the second direction Y, the edge D2 of the insulating layer 30 extending from the display area AA to the second area S2 is located on a side of the insulating layer 30 extending from the display area AA to the edge D3 of the third area S3, which is close to the display area AA; wherein the first direction X intersects the second direction Y.

Specifically, the substrate 10 may be a flexible substrate, and for example, the material of the substrate 10 may be polyimide. The substrate 10 may also be a rigid substrate, for example, the material of the substrate 10 may be glass. A driving circuit layer may be provided on the substrate 10 for forming a pixel circuit. Illustratively, the pixel circuit includes a drive transistor and a capacitor; the driving circuit layer may include a gate electrode layer, a capacitor electrode layer, and a first source-drain electrode layer, the gate electrode layer may be used to form a gate of the driving transistor and a first plate of the capacitor, the capacitor electrode layer may be used to form a second plate of the capacitor, and the first source-drain electrode layer may be used to form a source-drain electrode of the driving transistor. The driving transistor may be a bottom gate transistor, or may be a top gate transistor. The first source-drain electrode layer can also be used for forming part of signal lines to transmit driving signals to drive the pixel circuits to work. The display panel may further include a second source-drain electrode layer, a first planarization layer, a second planarization layer, a pixel defining layer, and a light emitting device. The second source/drain electrode layer is disposed on a side of the first source/drain electrode layer away from the substrate 10, and is used for forming a part of signal lines to transmit driving signals to drive the pixel circuit to work. The first planarization layer is disposed between the first source-drain electrode layer and the second source-drain electrode layer, and the second planarization layer is disposed on a side of the second source-drain electrode layer away from the substrate 10. The pixel defining layer is arranged on the side of the second planarisation layer remote from the substrate 10. In the display area AA, an opening is provided on the pixel defining layer, the opening defining a position of the light emitting device.

The signal transmission layer 20 may include a first source-drain electrode layer and/or a second source-drain electrode layer for forming the first signal line L1 and/or the second signal line L2. The display panel further comprises a light emitting device and a pixel circuit connected with the light emitting device, wherein an anode of the light emitting device is connected with the pixel circuit and used for acquiring driving current provided by the pixel circuit. The first signal line L1 and the second signal line L2 may extend from the non-display area NAA to the display area AA for providing driving signals to pixels of the display area AA. The driving signals provided by the first signal line L1 and the second signal line L2 may be the same signal or different signals. In the non-display area NAA, a gap is provided between the first signal line L1 and the second signal line L2, so that the first signal line L1 and the second signal line L2 are prevented from being shorted. For example, in some embodiments, the first signal line L1 may be a first power signal line connected to the cathode of the light emitting device to provide the first power signal to the cathode of the light emitting device. The second signal line L2 may be a second power signal line extending from the non-display area NAA to the display area AA and connected to a power terminal of the pixel circuit, for providing a second power signal to an anode of the light emitting device.

At least a portion of the insulating layer 30 is disposed on a side of the signal transmission layer 20 facing away from the substrate 10, and extends from the display area AA to a portion of the non-display area NAA, for insulating the signal transmission layer 20 in the display area AA. While having an edge at the non-display area NAA such that the surface of the non-display area NAA has a height difference to form a leveling area at a side of the edge of the insulating layer 30 remote from the display area AA. For example, the material of the insulating layer 30 may be an organic material, and the insulating layer 30 may be patterned by the organic insulating layer to form an edge in the non-display area NAA. The display panel may further include a light emitting device and an encapsulation layer, the light emitting device being located in the display area AA and disposed at a side of the insulating layer 30 remote from the substrate 10. The encapsulation layer is disposed on a side of the light emitting device remote from the substrate 10 and extends from the display area AA to the non-display area NAA. The encapsulation layer may include an organic encapsulation layer, and when the organic encapsulation layer is formed, a material of the organic encapsulation layer overflows from the display area AA to the non-display area NAA, and an overflow edge of the organic encapsulation material is monitored at the leveling area, so that encapsulation reliability of the encapsulation layer may be ensured. The width of the leveling region along the second direction Y is greater than a certain distance, so that the edge of the insulating layer 30 can be prevented from affecting the monitoring result when detecting the overflow edge of the organic encapsulation material.

The first region S1 is provided with a first signal line L1, and the first signal line L1 may provide a cathode power signal to the light emitting device in the display panel, for example, the voltage of the first power signal may be-7V. Illustratively, in the first region S1, the first signal line L1 extends in the first direction X. The third region S3 is provided with a second signal line L2, and the second signal line L2 may supply a power signal to a pixel circuit in the display panel, for example, the voltage of the second power signal may be 7V. Illustratively, in the third region S3, the second signal line L2 extends in the second direction Y. The second region S2 has no first signal line L1 and no second signal line L2. The second region S2 may be a gap between the first signal line L1 and the second signal line L2 in the first direction X, for example.

When the edge D2 of the insulating layer 30 extending from the display area AA to the second area S2 is located at a side of the insulating layer 30 extending from the display area AA to the third area S3 near the display area AA along the second direction Y, under a condition that the width of the other area of the non-display area NAA of the display panel along the second direction Y is certain, the width h2 of the leveling area formed by the insulating layer 30 at a side of the edge of the second area S2 far from the display area AA is larger than the width h3 of the leveling area formed by the insulating layer 30 at a side of the edge of the third area S3 far from the display area AA, so that the width h3 of the additional leveling area formed by the insulating layer 30 at a side of the edge of the third area S3 far from the display area AA can be compressed, which is favorable for realizing the narrow frame design of the display panel. And the length B3 of the insulating layer 30 in the third region S3 along the second direction Y can be ensured to be relatively large, so that the probability of short circuit between the second signal line L2 and the cathode layer of the display panel is reduced, and the reliability of the display panel is improved. Meanwhile, the width h2 of the leveling region formed on the side, far away from the display region AA, of the edge of the second region S2 of the insulating layer 30 can be ensured to be larger, the overflow edge of the organic packaging material is monitored through the leveling region formed on the side, far away from the display region AA, of the edge of the second region S2 of the insulating layer 30, and the monitoring effectiveness of the overflow edge of the organic packaging material is ensured, so that the packaging effectiveness of the display panel can be ensured. And the first signal line L1 and the second signal line L2 are not arranged in the second area S2, so that when the display panel is provided with a cathode layer, the short circuit between the first signal line L1 and the second signal line L2 and the cathode layer is avoided, and the reliability of the display panel is ensured.

According to the technical scheme, the edge of the insulating layer extending from the display area to the second area is located at one side of the insulating layer extending from the display area to the third area and close to the display area through the arrangement along the second direction, so that the width of the leveling area formed by the insulating layer at one side of the edge of the second area, which is far away from the display area, is larger than that of the leveling area formed by the insulating layer at one side of the edge of the third area, which is far away from the display area. At this time, a gap between the first signal line and the second signal line along the first direction can be used to form a part of leveling region, so that the width of the leveling region formed on one side of the edge of the third region, far away from the display region, of the insulating layer can be compressed, and the narrow frame design of the display panel can be realized. Meanwhile, the width of the leveling region formed on the side, far away from the display region, of the edge of the second region of the insulating layer is larger, the overflow edge of the organic packaging material is monitored through the leveling region formed on the side, far away from the display region, of the edge of the second region of the insulating layer, the monitoring effectiveness of the overflow edge of the organic packaging material is guaranteed, and therefore the packaging effectiveness of the display panel can be guaranteed. And there are no first signal line and second signal line in the second district, when the display panel is provided with the cathode layer, avoid first signal line and second signal line to short circuit with the cathode layer, have guaranteed the reliability of the display panel.

With continued reference to fig. 2 and 3, the display panel further includes a conductive layer 40, the conductive layer 40 being disposed on a side of the insulating layer 30 facing away from the substrate 10, the conductive layer 40 extending from the display area AA to the non-display area NAA; the edge D3 of the insulating layer 30 extending from the display area AA to the third area S3 is located at a side of the edge D4 of the conductive layer 40 away from the display area AA.

Specifically, when the edge D3 of the insulating layer 30 extending from the display area AA to the third area S3 is located at the side of the edge D4 of the conductive layer 40 away from the display area AA, the insulating layer 30 may be disposed between the second signal line L2 of the third area S3 and the conductive layer 40, so that the probability of shorting between the second signal line L2 and the conductive layer 40 may be reduced, and the reliability of the display panel is improved.

For example, in some embodiments, a distance B3 between an edge D3 of the insulating layer 30 extending from the display area AA to the third area S3 and an edge D4 of the conductive layer 40 may be set to be greater than or equal to a second preset distance. The second preset distance may be greater than or equal to a process error of the conductive layer, such as a shadow (shadow). By setting the distance B3 between the edge D3 of the insulating layer 30 extending from the display area AA to the third area S3 and the edge D4 of the conductive layer 40 to be greater than or equal to the second preset distance, the length of the insulating layer 30 between the second signal line L2 and the conductive layer 40 may be made greater than or equal to the second preset distance, and the probability of shorting between the second signal line L2 and the conductive layer 40 may be reduced, thereby improving the reliability of the display panel. The second preset distance may be greater than or equal to a process error of the cathode layer.

With continued reference to fig. 2 and 3, the insulating layer 30 extends from the display area AA to the edge D1 of the first area S1 on the side of the edge D4 of the conductive layer 40 away from the display area AA;

Specifically, when the insulating layer 30 extends from the display area AA to the side of the edge D1 of the first area S1 away from the display area AA, the insulating layer 30 may be disposed between the first signal line L1 of the first area S1 and the conductive layer 40, so that the probability of shorting between the first signal line L1 and the conductive layer 40 may be reduced, and the reliability of the display panel is improved. When the signals of the first signal line L1 and the conductive layer 40 are identical, a heat generation phenomenon caused by a short circuit of a small area between the first signal line L1 and the conductive layer 40 can be improved.

For example, in some embodiments, the distance B1 between the edge D1 of the insulating layer 30 extending from the display area AA to the first area S1 and the edge D4 of the conductive layer 40 may be smaller than the second preset distance, and the width of the additionally disposed leveling area may be reduced, thereby facilitating realization of a narrow bezel of the display panel.

In some embodiments, conductive layer 40 includes a cathode layer for forming a cathode of a light emitting device in a subpixel; the first signal line L1 is for supplying a first power signal to the cathode layer. At this time, the signals transmitted by the first signal line L1 and the cathode layer are both the first power signal. When the length of the insulating layer 30 between the first signal line L1 and the cathode layer is smaller than the second preset distance, in the process of manufacturing the display panel, when a shorting phenomenon is easily generated between the first signal line L1 and the cathode layer due to a process error of the cathode layer, the signal transmission reliability of the display panel can be ensured.

In some embodiments, the second signal line L2 is used to provide a second power signal to the pixel circuit. At this time, the probability of short circuit between the second power supply signal and the first power supply signal transmitted by the cathode layer can be reduced, and the signal transmission reliability of the display panel is improved.

Fig. 4 is a schematic partial view of a display panel according to an embodiment of the invention. As shown in fig. 3 and 4, along the second direction Y, an edge D2 of the insulating layer 30 extending from the display area AA to the second area S2 is located at a side of the insulating layer 30 extending from the display area AA to an edge D1 of the first area S1 near the display area AA.

Specifically, as shown in fig. 3 and4, the display panel may further include a conductive layer 40, where the conductive layer 40 is disposed on a side of the insulating layer 30 away from the substrate 10, and the conductive layer 40 extends from the display area AA to the non-display area NAA, and has an edge D4 in the non-display area NAA. In the second direction Y, when the edge D2 of the insulating layer 30 extending from the display area AA to the second area S2 is located at a side of the insulating layer 30 extending from the display area AA to the first area S1 near the display area AA, a length B1 of the insulating layer 30 in the first area S1 is greater than a length B2 of the insulating layer 30 in the second area S2 along the second direction Y. The width h3 of the leveling region formed on the side, far from the display area AA, of the edge of the third region S3 of the insulating layer 30 can be smaller, so that the length B1 of the insulating layer 30 between the first signal line L1 in the first region S1 and the edge D4 of the conductive layer 40 can be ensured to be larger, and therefore, the phenomenon of small-area short circuit between the first signal line L1 and the conductive layer 40 due to process errors and the like when the conductive layer 40 is formed can be avoided, and the phenomenon of edge scalding of the display panel is improved.

With continued reference to fig. 4, along the first direction X, the edge D1 of the insulating layer 30 extending from the display area AA to the first area S1 and the edge D3 of the insulating layer 30 extending from the display area AA to the third area S3 are located on the same line.

Specifically, along the first direction X, the edge D1 of the insulating layer 30 extending from the display area AA to the first area S1 and the edge D3 of the insulating layer 30 extending from the display area AA to the third area S3 are located on the same straight line, so that the width h3 of the leveling area formed by the insulating layer 30 on the side, far from the display area AA, of the edge of the third area S3 and the width h1 of the leveling area formed by the insulating layer 30 on the side, far from the display area AA, of the edge of the first area S1 can be synchronously compressed, when the frame width of the display panel is reduced, the length B1 of the insulating layer 30 in the first area S1 and the length B3 of the insulating layer 30 in the third area S3 can be increased, so that the probability of short-circuiting between the first signal line L1 and the second signal line L2 and the conductive layer 40 can be reduced, and the overall performance of the display panel is improved.

In some embodiments, the edge D1 of the insulating layer 30 extending from the display area AA to the first area S1 along the second direction Y may also be disposed on a side of the insulating layer 30 extending from the display area AA to the third area S3 near the display area AA (see fig. 2).

Specifically, in the second direction Y, when the edge D1 of the insulating layer 30 extending from the display area AA to the first area S1 is located at a side of the insulating layer 30 extending from the display area AA to the third area S3 near the display area AA, a distance between the edge D1 of the insulating layer 30 extending from the display area AA to the first area S1 and the edge of the conductive layer 40 may be smaller than a distance between the edge D3 of the insulating layer 30 extending from the display area AA to the third area S3 and the edge of the conductive layer 40. At this time, the distance B3 between the edge D3 of the insulating layer 30 extending from the display area AA to the third area S3 and the edge of the conductive layer 40 may be greater than or equal to a predetermined distance, so as to reduce the probability of short circuit between the conductive layer 40 and the second signal line L2 caused by process errors. Meanwhile, the distance B1 between the edge D1 of the insulating layer 30 extending from the display area AA to the first area S1 and the edge of the conductive layer 40 may be smaller than the predetermined distance, which is beneficial to realizing the narrow frame design of the display panel.

With continued reference to fig. 3 and 4, the vertical projection of the insulating layer 30 on the substrate 10 from the display area AA to the edge D1 of the first area S1 overlaps with the vertical projection of the first signal line L1 on the substrate 10.

Specifically, the vertical projection of the insulating layer 30 extending from the display area AA to the edge D1 of the first area S1 on the substrate 10 overlaps with the vertical projection of the first signal line L1 on the substrate 10, so that the side of the first signal line L1 far from the substrate 10 is insulated from other conductive layers by the insulating layer 30, thereby reducing the probability of short-circuiting between the first signal line L1 and the other conductive layers and ensuring the reliability of the display panel.

With continued reference to fig. 3 and 4, the vertical projection of the insulating layer 30 on the substrate 10 from the edge D3 of the display area AA to the third area S3 overlaps with the vertical projection of the second signal line L2 on the substrate 10.

Specifically, the vertical projection of the insulating layer 30 extending from the display area AA to the edge D3 of the third area S3 on the substrate 10 overlaps with the vertical projection of the second signal line L2 on the substrate 10, so that the side of the second signal line L2 away from the substrate 10 is insulated from other conductive layers by the insulating layer 30, thereby reducing the probability of short-circuiting between the second signal line L2 and other conductive layers and ensuring the reliability of the display panel.

With continued reference to fig. 3 and 4, the display panel further includes a conductive layer 40, the conductive layer 40 being disposed on a side of the insulating layer 30 facing away from the substrate 10, the conductive layer 40 extending from the display area AA to the non-display area NAA; the edge D3 of the insulating layer 30 extending from the display area AA to the third area S3 is located at a side of the edge D4 of the conductive layer 40 away from the display area AA.

Specifically, as in fig. 2 and 3, when the insulating layer 30 extends from the display area AA to the edge D3 of the third area S3 and is located at the side of the edge D4 of the conductive layer 40 away from the display area AA, the insulating layer 30 may be disposed between the second signal line L2 of the third area S3 and the conductive layer 40, so that the probability of shorting between the second signal line L2 and the conductive layer 40 may be reduced, and the reliability of the display panel is improved. For example, in some embodiments, a distance B3 between an edge D3 of the insulating layer 30 extending from the display area AA to the third area S3 and an edge D4 of the conductive layer 40 may be set to be greater than or equal to a second preset distance. The second preset distance may be greater than or equal to a process error of the cathode layer. By setting the distance B3 between the edge D3 of the insulating layer 30 extending from the display area AA to the third area S3 and the edge D4 of the conductive layer 40 to be greater than or equal to the second preset distance, the length of the insulating layer 30 between the second signal line L2 and the conductive layer 40 may be made greater than or equal to the second preset distance, and the probability of shorting between the second signal line L2 and the conductive layer 40 may be reduced, thereby improving the reliability of the display panel. The second preset distance may be greater than or equal to a process error of the cathode layer.

Similarly, when the insulating layer 30 extends from the display area AA to the side of the edge D1 of the first area S1 away from the display area AA, the insulating layer 30 can be disposed between the first signal line L1 of the first area S1 and the conductive layer 40, so that the probability of shorting between the first signal line L1 and the conductive layer 40 can be reduced, and the reliability of the display panel is improved. When the signals of the first signal line L1 and the conductive layer 40 are identical, a heat generation phenomenon caused by a short circuit of a small area between the first signal line L1 and the conductive layer 40 can be improved.

In some embodiments, conductive layer 40 includes a cathode layer for forming a cathode of a light emitting device in a subpixel; the first signal line L1 is for supplying a first power signal to the cathode layer. The second signal line L2 is for supplying a second power supply signal to the pixel circuit.

With continued reference to fig. 2 and 3, the display panel further includes a dam 50 disposed in the non-display area NAA, the dam 50 being disposed around the display area AA, the dam 50 sequentially passing through the first area S1, the second area S2 and the third area S3, the insulating layer 30 extending from the display area AA to an edge D2 of the second area S2 being located at a side of the dam 50 adjacent to the display area AA and spaced apart from the dam 50;

Specifically, as shown in fig. 2 and 3, when the insulating layer 30 extends from the display area AA to the non-display area NAA, there is a height difference at the edge of the insulating layer 30 to form a barrier structure where the leveling area is close to the display area AA. The edge of the insulating layer 30 is spaced from the bank 50 such that the edge of the insulating layer 30 and the spaced area of the bank 50 constitute a leveling region, and the bank 50 serves as a barrier structure on the side of the leveling region away from the display area AA. The dam 50 sequentially passes through the first, second and third regions S1, S2 and S3, so that the dam 50 can serve as a barrier structure of the leveling regions of the first, second and third regions S1, S2 and S3, respectively, on a side far from the display region AA. Wherein the dam 50 may have a single-layer structure or a laminated structure. Taking the bank 50 as an example of the stacked structure, the bank 50 may include a portion of the second planarization layer and a portion of the pixel definition layer, and the portion of the second planarization layer and the portion of the pixel definition layer may be stacked.

In some embodiments, the insulating layer 30 extends from the display area AA to the edges of the first, second and third areas S1, S2 and S3 on the side of the bank 50 adjacent to the display area AA; in the second direction Y, the space between the bank 50 and the insulating layer 30 constitutes a leveling region; the width h2 of the leveling zone in the second zone S2 is greater than the width h3 of the leveling zone in the third zone S3.

Specifically, when the bank 50 is used as a barrier structure on the side of the leveling region away from the display region AA, the width of the leveling region in the second direction Y is the distance between the edge of the insulating layer 30 and the edge of the bank 40 near the display region AA. When the distances from the edges of the banks 50 of different areas near the display area AA to the edges of the display area AA are equal, the distances from the edges of the insulating layers 30 of different areas to the display area AA may be set to be different, that is, the lengths of the insulating layers 30 of different areas in the second direction Y are different, so that the widths of the leveling areas of different areas may be adjusted. The width h2 of the leveling region in the second region S2 is larger than the width h3 of the leveling region in the third region S3, so that the width of the leveling region in the second region S2 meets the monitoring effectiveness of the overflow edge of the organic packaging material. And the second area S2 has no first signal line L1 and second signal line L2, so that the phenomenon that the first signal line L1 and the second signal line L2 are in short circuit with the cathode layer due to the fact that the length B2 of the insulating layer 30 in the second area S2 is relatively short is avoided. Meanwhile, the width of the leveling region in the third region S3 is smaller, so that the width occupied by the leveling region along the second direction Y can be compressed, and the narrow frame of the display panel can be realized. And the length B3 of the insulating layer 30 in the third region S3 can be made longer, so that the probability of short-circuiting the second signal line L2 with the cathode layer of the display panel is reduced, and the reliability of the display panel is improved.

In some embodiments, referring to fig. 2 and 4, the bank 50 includes a portion of an insulating layer, the insulating layer 30 is provided with a first opening M between the bank 50 and the display area AA, the first opening M being a leveling area; the vertical projection of the first opening M on the substrate 10 overlaps with the vertical projections of the first region S1, the second region S2, and the third region S3 on the substrate 10; in the second direction Y, the portions of the first opening M near the edges of the display area AA located in the first area S1, the second area S2 and the third area S3 are the edges of the insulating layer 30 extending from the display area AA to the first area S1, the second area S2 and the third area S3, respectively.

Specifically, referring to fig. 2, the portion of the first opening M near the edge of the display area AA located in the first area S1 is the insulating layer 30 extending from the display area AA to the edge D1 of the first area S1, the portion of the first opening M near the edge of the display area AA located in the second area S2 is the insulating layer 30 extending from the display area AA to the edge D2 of the second area S2, and the portion of the first opening M near the edge of the display area AA located in the third area S3 is the insulating layer 30 extending from the display area AA to the edge D3 of the third area S3.

Illustratively, as shown in fig. 2, when the distances from the edge of the bank 50 near the display area AA to the edge of the display area AA in the different areas are equal, the sum of the distance h1 between the edge of the insulating layer 30 of the first area S1 and the length B1 of the insulating layer 30 in the second direction Y in the first area S1, the sum of the distance h2 between the edge of the insulating layer 30 of the second area S2 and the length B2 of the insulating layer 30 in the second direction Y in the second area S2, and the sum of the distance h3 between the edge of the insulating layer 30 of the third area S3 and the length B3 of the insulating layer 30 in the second direction Y in the third area S3 are equal. By setting the length B2 of the insulating layer 30 in the second region S2 in the second direction Y to be smaller than the length B3 of the insulating layer 30 in the third region S3 in the second direction Y, the distance h2 between the edge of the insulating layer 30 in the second region S2 and the bank 50 can be made larger than the distance h3 between the edge of the insulating layer 30 in the third region S3 and the bank 50, so that the width of the leveling region in the second region S2 is made larger than the width of the leveling region in the third region S3.

In some embodiments, the width h2 of the leveling zone in the second zone S2 is greater than or equal to the first preset distance along the second direction Y.

Specifically, the material of the insulating layer 30 may be an organic material, and the edge of the insulating layer 30 may serve as a barrier structure of the leveling region near the display area AA. By setting the width h2 of the leveling region in the second region S2 to be greater than or equal to the first preset distance, it is possible to avoid the edge of the organic material of the insulating layer 30 from interfering with the monitoring of the overflow edge of the organic encapsulation material when monitoring the overflow edge of the organic encapsulation material, and to ensure the monitoring reliability of the overflow edge of the organic encapsulation material. The first preset distance may be set according to a monitoring requirement of an overflow edge of the organic packaging material, which is not limited herein.

In some embodiments, the width h3 of the leveling zone in the third zone S3 is less than the first preset distance along the second direction Y.

Specifically, the width h2 of the leveling region in the second region S2 is the sum of the width h3 of the leveling region in the third region S3 and the length difference of the insulating layer 30 between the second region S2 and the third region S3. When the width h2 of the leveling region in the second region S2 is greater than or equal to a first preset distance, the width h3 of the leveling region in the third region S3 can be set to be smaller than the first preset distance, so that the width h2 of the leveling region in the second region S2 can further utilize gaps between the first signal line L1 and the second signal line L2 along the first direction X, the width of the additionally set leveling region can be further reduced, and the narrow frame of the display panel can be further realized.

It should be noted that fig. 2 and 3 are only examples. In some embodiments, the dam 50 may further include a portion of an insulating layer, where the insulating layer 30 is provided with a first opening M, and the first opening M is located between the dam 50 and the display area AA, and the first opening M is a leveling area; the vertical projection of the first opening M onto the substrate 10 overlaps with the vertical projection of the second region S2 onto the substrate 10; the vertical projection of the first opening M on the substrate 10 is spaced from the vertical projection of the third region S3 on the substrate 10; and/or, the vertical projection of the first opening M onto the substrate 10 is spaced from the vertical projection of the first region S1 onto the substrate 10.

Specifically, fig. 5 is a schematic partial view of another display panel according to an embodiment of the present invention. As shown in fig. 5, the vertical projection of the first opening M on the substrate 10 overlaps with the vertical projection of the second region S2 on the substrate 10, and the width of the first opening M in the second direction Y is the width of the leveling region in the second region S2. The vertical projection of the first opening M onto the substrate 10 is arranged at a distance from the vertical projection of the third region S3 onto the substrate 10 in the first direction X such that the width h1 of the leveling region in the first region S1 is equal to zero. The vertical projection of the first opening M onto the substrate 10 is arranged at a distance from the vertical projection of the first region S1 onto the substrate 10 in the first direction X such that the width h3 of the leveling region in the third region S3 is equal to zero. When the width h1 of the leveling region in the first region S1 and/or the width h3 of the third region S3 are equal to zero, the width h2 of the leveling region in the second region S2 multiplexes the width of the gap between the first signal line L1 and the second signal line L2, no additional leveling region is needed, the narrow frame of the display panel is further realized, meanwhile, the overflow edge of the organic packaging material in the leveling region of the second region S2 can be monitored, the monitoring effectiveness of the overflow edge of the organic packaging material is ensured, and therefore the packaging effectiveness of the display panel can be ensured.

In some embodiments, the material of the dike 50 includes an organic material. In the manufacturing process of the display panel, an organic material layer may be formed on the signal transmission layer 20 and then patterned to form the bank 50.

With continued reference to fig. 4, the width h2 of the leveling zone in the second zone S2 is greater than the width h1 of the leveling zone in the first zone S1.

Specifically, the distance from the edge of the display area AA to the edge of the display area AA of the banks 50 of different areas is equal. When the width h2 of the leveling region in the second region S2 is greater than the width h1 of the leveling region in the first region S1, the length B1 of the insulating layer 30 in the first region S1 is greater than the length B2 of the insulating layer 30 in the second region S2. At the moment, the width h2 of the leveling region in the second region S2 can be larger, and the monitoring effectiveness of the overflow edge of the organic packaging material is ensured. Meanwhile, the length B1 of the insulating layer 30 in the first area S1 is larger, so that the phenomenon of small-area short circuit between the first signal line L1 and the conductive layer 40 is reduced, and the phenomenon of edge burning of the display panel is improved.

Preferably, in the second direction Y, the width h1 of the leveling zone in the first zone S1 is smaller than the first preset distance.

Specifically, when the leveling region of the second region S2 multiplexes the gap between the first signal line L1 and the second signal line L2, the width h1 of the leveling region in the first region S1 may be set to be smaller than a first preset distance, and when the width h2 of the leveling region in the second region S2 is ensured to be greater than or equal to the first preset distance, the width of the additionally increased leveling region is reduced, thereby being beneficial to realizing a narrow frame of the display panel.

Fig. 6 is a schematic partial view of another display panel according to an embodiment of the present invention, as shown in fig. 6, a dam 50 includes a first dam 51 and a second dam 52, and the second dam 52 is disposed on a side of the first dam 51 away from the display area AA; the first bank 51 sequentially passes through the first, second and third regions S1, S2 and S3, and the leveling region is disposed between the first bank 51 and the insulating layer 30.

Specifically, as shown in fig. 6, the first bank 51 and the second bank 52 are each disposed around the display area AA. The leveling region is arranged between the first dykes and dams 51 and the insulating layer 30, and the width h2 of the leveling region in the second region S2 is larger than the width h3 of the leveling region in the third region S3, so that the leveling region in the second region S2 multiplexes the gap between the first signal line L1 and the second signal line L2, and the width h2 of the leveling region in the second region S2 is ensured to be large enough. Meanwhile, the width h3 of the additionally arranged leveling region in the third region S3 can be reduced, and the narrow frame design of the display panel is facilitated.

With continued reference to fig. 6, a guard zone is provided between the second dike 52 and the first dike 51; the width of the protection area along the second direction Y is smaller than the width h2 of the leveling area in the second area S2. By providing the modified guard area, the possibility of the organic encapsulation material overflowing the second bank 52 can be further reduced. In some embodiments, the width of the guard area along the second direction Y is less than the first preset distance.

In some embodiments, referring to fig. 3, the display panel further includes an organic encapsulation layer 60, and the first bank 51 surrounds the organic encapsulation layer 60;

Specifically, the organic encapsulation layer 60 is used for encapsulating the display area of the display panel, so as to improve the service life of the display panel. The first bank 51 is disposed around the organic encapsulation layer 60, and can block the overflow phenomenon of the organic material of the organic encapsulation layer 60 when the organic encapsulation layer 60 is formed, thereby ensuring the encapsulation effect of the organic encapsulation layer 60.

In some embodiments, the second dike 52 passes through the first, second and third zones S1, S2, S3 in sequence; at the first region S1, an insulating layer 30 is provided continuously at a gap between the first bank 51 and the second bank 52; and/or, at the third region S3, the insulating layer 30 is provided continuously at the gap between the first bank 51 and the second bank 52. Taking an example in which the first bank 51 and the second bank 52 are each laminated with a portion of the second planarizing layer and a portion of the pixel defining layer, the insulating layer 30 provided continuously is provided at a gap between the first bank 51 and the second bank 52, which means that: a second planarizing layer is provided continuously at a gap between the first bank 51 and the second bank 52.

Specifically, in some embodiments, in the third area S3, the insulating layer 30 may be continuously disposed between the first bank 51 and the second bank 52, and at this time, the organic packaging material may be monitored through the leveling area of the second area S2, and the width between the first bank 51 and the second bank 52 may be compressed, which is beneficial to further compressing the frame of the display panel. Similarly, the insulating layer 30 may be continuously disposed between the first bank 51 and the second bank 52 in the first area S1, and at this time, the organic packaging material may be monitored by the leveling area of the second area S2, so as to compress the width between the first bank 51 and the second bank 52, which is beneficial to further compressing the frame of the display panel.

In some embodiments, in the third region S3, a distance between the first bank 51 and the second bank 52 along the second direction Y may be set to zero, and the bezel of the display panel may be further compressed. In the first area S1, the distance between the first dam 51 and the second dam 52 along the second direction Y may be set to zero, so that the frame of the display panel may be further compressed.

In some embodiments, the first bank 51 and the second bank 52 include portions of the insulating layer 30. At this time, the insulating layer 30 may extend to the second bank 52 through the first opening M, for forming a part of the first and second banks 51 and 52, and be continuously disposed between the first and second banks 51 and 52, so as to facilitate compressing the frame of the display panel according to the requirement.

Fig. 7 is a schematic partial view of another display panel according to an embodiment of the present invention, as shown in fig. 7, a width h2 of the leveling region in the second region S2 is greater than a width h1 of the leveling region in the first region S1.

Specifically, unlike fig. 6, in fig. 7, the width h2 of the leveling region in the second region S2 is greater than the width h1 of the leveling region in the first region S1, so that the width h2 of the leveling region in the second region S2 is relatively large, and the monitoring effectiveness of the overflow edge of the organic packaging material is ensured. Meanwhile, the length B1 of the insulating layer 30 in the first area S1 is larger, so that the phenomenon of small-area short circuit between the first signal line L1 and the conductive layer 40 is reduced, and the phenomenon of edge burning of the display panel is improved.

With continued reference to fig. 7, when the width h2 of the leveling region in the second region S2 is greater than the width h1 of the leveling region in the first region S1, the width h2 of the leveling region in the second region S2 may be set to be greater than or equal to the first preset distance.

On the basis of the above technical solutions, with continued reference to fig. 2 and fig. 4 to fig. 7, the vertical projection of the second region S2 on the substrate 10 is spaced from the vertical projection of the second signal line L2 on the substrate 10, and the vertical projection of the second region S2 on the substrate 10 is spaced from the vertical projection of the first signal line L1 on the substrate 10.

Specifically, the vertical projection of the second region S2 on the substrate 10 and the vertical projection of the second signal line L2 on the substrate 10 are arranged at intervals, and the length B2 of the insulating layer 30 along the second direction Y in the second region S2 is relatively short, so that the short circuit phenomenon caused by the short length of the insulating layer 30 between the second signal line L2 and the cathode layer can be avoided, and the reliability of the display panel is improved. The vertical projection of the second region S2 on the substrate 10 is spaced from the vertical projection of the first signal line L1 on the substrate 10, and the length B2 of the insulating layer 30 along the second direction Y in the second region S2 is shorter, so that a short circuit phenomenon between the first signal line L1 and the cathode layer due to the short length of the insulating layer 30 can be avoided, and an edge heating phenomenon of the display panel is improved.

In some embodiments, the signals transmitted by the first signal line L1 and the second signal line L2 are the same or different.

Specifically, the first signal line L1 and the second signal line L2 may be different signal lines for transmitting the same signal, or may be signal lines for transmitting different signals, and by setting a gap between the first signal line L1 and the second signal line L2, disconnection of the first signal line L1 and the second signal line L2 may be avoided.

In some embodiments, the non-display area includes a binding area; the first region, the second region and the third region are disposed between the binding region and the display region along the second direction.

Specifically, the binding area is provided with a binding terminal, the display panel can further comprise a driving chip, and output pins of the driving chip can be connected with signal wires of the non-display area through the binding terminal and used for providing driving signals for the display panel. Along the second direction, first district, second district and third district set up in binding between district and the display area for first district, second district and third district set up in display panel's lower frame, thereby can narrow display panel's lower frame, further improvement display panel's visual.

On the basis of the technical schemes, the non-display area comprises two first areas and two second areas; the two first regions are symmetrically disposed about the third region and the two second regions are symmetrically disposed about the third region.

Specifically, the first signal line and the second signal line may be symmetrically disposed along a center line extending in the second direction of the display panel in the non-display area. The center line of the third area may be located on the same line as the center line extending in the second direction of the display panel, and the third area is symmetrically disposed about the center line extending in the second direction of the display panel. Along the first direction, two sides of a center line extending in the second direction of the display panel may include first regions and second regions, respectively, the two first regions being symmetrically disposed about the third region, and the two second regions being symmetrically disposed about the third region. When the edges of the insulating layer are arranged, the edges of the insulating layers in the same areas on two sides can be arranged on the same straight line along the first direction, so that the edges of the second areas extending to two sides from the display area of the insulating layer are all positioned on one side, close to the display area, of the edges of the third areas extending to two sides from the display area of the insulating layer, and the narrow frame of the display panel is realized.

On the basis of the above technical solutions, referring to fig. 3, the signal transmission layer 20 includes a first signal transmission layer 21, the insulating layer 30 includes a first insulating layer 31, and the first insulating layer 31 is disposed on a side of the first signal transmission layer 21 facing away from the substrate 110; the first signal transmission layer 21 is used to form a first signal line L1 and a second signal line L2; the edge of the first insulating layer 31 extending from the display area AA to the second area S2 is located at one side of the edge of the first insulating layer 31 extending from the display area AA to the third area S3 near the display area AA.

Specifically, the signal transmission layer 20 may include only the first signal transmission layer 21 for forming the first signal line L1 and the second signal line L2. For example, the substrate 10 may be provided thereon with a driving circuit layer, and the first signal transmission layer 21 may be a first source-drain electrode layer, and the first insulating layer 31 may include at least one of the first planarization layer, the second planarization layer, and the pixel definition layer described above when forming the pixel circuit. Wherein the pixel defining layer is disposed on a side of the driving circuit layer away from the substrate 10. In the display area AA, an opening is provided on the pixel defining layer, the opening defining a position of the light emitting device. The first insulating layer 31 is exemplarily shown in fig. 3 as a first planarization layer. The edge of the first insulating layer 31 may serve as a barrier structure of the leveling region near the display area AA at this time, so that the length of the insulating layer between the first signal transmission layer 21 and the conductive layer 40, and the width of the leveling region may be adjusted according to the edge position of the first insulating layer 31.

In other embodiments, the first signal transmission layer 21 may be the second source-drain electrode layer described above, and the first insulating layer 31 may include at least one of the second planarization layer and the pixel definition layer described above.

Note that, the bank 50 may be provided in the same layer as the first insulating layer 31, ensuring flatness of the leveling region. Illustratively, the material of the bank 50 may be the same as that of the first insulating layer 31, and the bank 50 may be formed simultaneously when the first insulating layer 31 is formed.

Fig. 8 is a schematic cross-sectional view of a display panel according to another embodiment of the invention. As shown in fig. 8, the signal transmission layer 20 includes a first signal transmission layer 21 and a second signal transmission layer 11, the insulating layer 30 includes a first insulating layer 31 and a second insulating layer 32, the first insulating layer 31 is disposed on a side of the first signal transmission layer 21 facing away from the substrate 10, the second signal transmission layer 22 is disposed on a side of the first insulating layer 31 facing away from the substrate 10, and the second insulating layer 32 is disposed on a side of the second signal transmission layer 22 facing away from the substrate 10; the edge of the first insulating layer 31 is located at one side of the edge of the second insulating layer 32 near the display area AA; in the second direction Y, the first signal transmission layer 21 and the second signal transmission layer 22 protrude from the edges of the first insulating layer 31, and the portion of the first signal transmission layer 21 protruding from the first insulating layer 31 overlaps with the portion of the second signal transmission layer 21 protruding from the first insulating layer 31; the edge of the second insulating layer 32 extending from the display area AA to the second area S2 is located at one side of the edge of the second insulating layer 32 extending from the display area AA to the third area S3 near the display area AA.

In particular, the display panel may include a plurality of metal layers for forming the driving circuit and the signal line. The first signal transmission layer 21 may be a first source-drain electrode layer on the substrate 10. The second signal transmission layer 22 may be a second source-drain electrode layer on the substrate 10. When the portion of the first signal transmission layer 21 extending out of the first insulating layer 31 overlaps the portion of the second signal transmission layer 21 extending out of the first insulating layer 31, the first signal transmission layer 21 and the second signal transmission layer 22 may simultaneously form the first signal line L1 and the second signal line L2, so as to ensure the reliability of the first signal line L1 and the second signal line L2. The second insulating layer 32 is disposed on a side of the second signal transmission layer 22 away from the substrate 10, and is used for insulating the second signal transmission layer 22 from the conductive layer on the side away from the substrate 10. For example, the second insulating layer 32 may be used to insulate the second signal transmission layer 22 from the conductive layer 40. By arranging the second insulating layer 32 to extend from the display area AA to the second area S2, the edge of the second insulating layer is positioned at one side, close to the display area AA, of the edge extending from the display area AA to the third area S3, so that the narrow frame design of the display panel is facilitated, the monitoring reliability of the leveling area can be ensured, and the packaging effectiveness of the display panel is ensured.

The first signal transmission layer is a first source/drain electrode layer, the second signal transmission layer is a second source/drain electrode layer, the first insulating layer is a first planarization layer, and the second insulating layer comprises at least one of a second planarization layer and a pixel definition layer.

Specifically, fig. 8 exemplarily shows that the second signal transmission layer 22 is a second source-drain electrode layer, and the second insulating layer 32 is a second planarization layer. In other embodiments, the second insulating layer may further include a pixel defining layer, which is not limited herein.

In some embodiments, the display panel further includes an anode layer at least a portion of which is exposed within the opening for forming an anode of the light emitting device.

It should be noted that, when the edge of the second insulating layer 32 is used as a barrier structure of the leveling region near the display region AA, the first insulating layer 31 may be removed at the edge of the leveling region. Meanwhile, the dam 50 can be arranged on the same layer as the second insulating layer 32, so that the flatness of the leveling area is ensured. Illustratively, the material of the bank 50 may be the same as that of the second insulating layer 32, and the bank 50 may be formed simultaneously when the second insulating layer 32 is formed.

In some embodiments, at least one of the first insulating layer 31 and the second insulating layer 32 extends from the display area AA to the second area S2 at an edge thereof located at a side of the edge extending from the display area AA to the first area S1 near the display area AA.

Specifically, fig. 8 exemplarily illustrates that the edge of the second insulating layer 32 extending from the display area AA to the second area S2 is located at a side of the second insulating layer 32 extending from the display area AA to the edge of the first area S1 near the display area AA, and the length of the second insulating layer 32 in the first area S1 is greater than the length of the second insulating layer 32 in the second area S2 along the second direction Y. The width of the leveling region formed on the side, far away from the display area AA, of the edge of the third region S3 of the second insulating layer 32 can be smaller, so that the length of the second insulating layer 32 between the first signal line L1 and the edge D4 of the conductive layer 40 in the first region S1 is ensured to be larger, and therefore, the phenomenon of small-area short circuit between the first signal line L1 and the conductive layer 40 due to process errors and the like when the conductive layer 40 is formed can be avoided, and the phenomenon of edge burning of the display panel is improved.

It should be noted that, in other embodiments, the edge of the first insulating layer 31 extending from the display area AA to the second area S2 may be disposed at a side of the edge extending from the display area AA to the first area S1 near the display area AA. Alternatively, the edge of the first insulating layer 31 extending from the display area AA to the second area S2 may be located at a side of the edge extending from the display area AA to the first area S1 near the display area AA, and the edge of the second insulating layer 32 extending from the display area AA to the second area S2 is located at a side of the edge extending from the display area AA to the first area S1 near the display area AA, which is not limited herein.

In some embodiments, the edge of the first insulating layer 31 is located at a side of the edge of the second insulating layer 32 near the display area AA.

Specifically, as shown in fig. 8, the edge of the first insulating layer 31 is located at a side of the edge of the second insulating layer 32 near the display area AA, and the first signal transmission layer 21 and the second signal transmission layer 22 may be disposed in an insulating manner in a region covered by the first insulating layer 31, for example, a region near the display area AA in the non-display area NAA, where the bending region is located. In the area where the first insulating layer 31 is not covered, for example, the area where the bending area is away from the display area AA in the non-display area NAA, the first signal transmission layer 21 and the second signal transmission layer 22 may be in a parallel connection structure. It should be noted that, the "parallel connection structure" refers to: the first signal line in the first signal transmission layer 21 is connected in parallel with the first signal line in the second signal transmission layer 22; the second signal line in the first signal transmission layer 21 is connected in parallel with the second signal line in the second signal transmission layer 22. By providing the first signal transmission layer 21 and the second signal transmission layer 22 to form different signal transmission lines, signal transmission reliability of the signal transmission lines can be ensured.

In some embodiments, the first signal transmission layer 21 includes a first lower layer, a first middle layer, and a first upper layer that are stacked, and the first lower layer, the first middle layer, and the first upper layer are conductive layers. In some embodiments, the material of the first lower layer and the first upper layer is titanium; the first middle layer is made of aluminum;

Specifically, the structure of the first signal transmission layer 21 may be a titanium/aluminum/titanium structure.

In some embodiments, the second signal transmission layer 22 includes a second lower layer, a second middle layer, and a second upper layer that are stacked, the second lower layer, the second middle layer, and the second upper layer being conductive layers. In some embodiments, the material of the second lower layer and the second upper layer is titanium; the second middle layer is made of aluminum; specifically, the structure of the second signal transmission layer 22 may be a titanium/aluminum/titanium structure.

The embodiment of the invention also provides a display panel. Fig. 9 is a schematic partial view of another display panel according to an embodiment of the invention. As shown in fig. 3 and 9, the display panel includes a display area AA and a non-display area NAA surrounding the display area AA; in the second direction Y, the area of the non-display area NAA located at one side of the display area AA includes a trace area S and a second area S2 arranged along the first direction X, and the display panel further includes a signal line L; the signal line L is positioned in the wiring area S and is positioned outside the second area S2; the display panel further includes:

a substrate 10;

a signal transmission layer 20 provided on one side of the substrate 10, at least a portion of the signal transmission layer 20 being used to form a signal line L;

The insulating layer 30, at least part of the insulating layer 30 is disposed on a side of the signal transmission layer 20 away from the substrate 10, and along the second direction Y, the edge D2 of the insulating layer 30 extending from the display area AA to the second area S2 is located on a side of the insulating layer 30 extending from the display area AA to the edge D of the trace area S, which is close to the display area AA; wherein the first direction X intersects the second direction Y; the vertical projection of the insulating layer 30 on the substrate 10 from the display area AA to the edge D of the track area S overlaps with the vertical projection of the signal line L on the substrate 10;

The conductive layer 40 is disposed on a surface of the insulating layer 30 facing away from the substrate 10.

Specifically, at least a portion of the insulating layer 30 is disposed on a side of the signal transmission layer 20 facing away from the substrate 10, and extends from the display area AA to a portion of the non-display area NAA, for insulating the signal transmission layer 20 from the conductive layer 40. The signal line L is arranged in the wiring area S, no signal line L is arranged in the second area S2, the insulating layer 30 is arranged at one side, extending from the display area AA to the edge D2 of the second area S, of the insulating layer 30, which is close to the display area AA, of the edge D of the wiring area S, and the second area S2 can be utilized to form a leveling area, so that the leveling area of the second area S2 can be utilized to monitor the overflow edge of the organic packaging material, the monitoring effectiveness of the overflow edge of the organic packaging material is ensured, and the packaging effectiveness of the display panel can be ensured. Meanwhile, the width of the insulation layer 30 forming an additional leveling area at the side of the edge D of the wiring area S far from the display area AA can be compressed, which is beneficial to realizing the narrow frame design of the display panel. And no signal line L exists in the second area S2, when the edge of the insulating layer 30 arranged in the second area S2 is relatively close to the display area AA, the short circuit between the signal line L and the conductive layer 40 can be avoided, and the reliability of the display panel is ensured.

On the basis of the above technical solution, referring to fig. 2 and 4, the routing area S includes a first area S1 and a third area S3, and the first area S1, the second area S2 and the third area S3 are arranged along a first direction X; the edge D2 of the insulating layer 30 extending from the display area AA to the second area S2 is located at a side of the insulating layer 30 extending from the display area AA to the edge D3 of the third area S3 near the display area AA, and/or the edge D2 of the insulating layer 30 extending from the display area AA to the second area S2 is located at a side of the insulating layer 30 extending from the display area AA to the edge D1 of the first area S1 near the display area AA.

In some embodiments, conductive layer 40 includes a cathode layer for forming a cathode of a light emitting device.

The embodiment of the invention also provides a display device. Fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 10, the display panel 200 includes an array substrate according to any embodiment of the present invention. The display panel comprises the array substrate provided by any embodiment of the present invention, so that the display panel has the same beneficial effects as the array substrate provided by any embodiment of the present invention, and the details are not repeated here. The display panel can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, intelligent wearing equipment, an information inquiry machine of a public place hall and the like.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims

1. A display panel, comprising a display area and a non-display area surrounding the display area; in the second direction, the area of the non-display area located on one side of the display area comprises a first area, a second area and a third area sequentially arranged along the first direction, the first area is provided with a first signal line, and the third area is provided with a second signal line; the display panel further comprises:

substrate;

A signal transmission layer, provided on one side of the substrate, for forming the first signal line and/or the second signal line;

An insulating layer, at least a portion of which is disposed on a side of the signal transmission layer facing away from the substrate, and along the second direction, an edge of the insulating layer extending from the display area to the second area is located on a side of an edge of the insulating layer extending from the display area to the third area close to the display area; wherein the first direction intersects with the second direction.

2. The display panel according to claim 1, characterized in that, along the second direction, an edge of the insulating layer extending from the display area to the second area is located on a side of an edge of the insulating layer extending from the display area to the first area close to the display area;

Preferably, along the first direction, the edge of the insulating layer extending from the display area to the first area and the edge of the insulating layer extending from the display area to the third area are located on the same straight line; or, along the second direction, the edge of the insulating layer extending from the display area to the first area is located on a side of the edge of the insulating layer extending from the display area to the third area close to the display area;

Preferably, a vertical projection of an edge of the insulating layer extending from the display area to the first area on the substrate overlaps with a vertical projection of the first signal line on the substrate;

Preferably, a vertical projection of an edge of the insulating layer extending from the display area to the third area on the substrate overlaps with a vertical projection of the second signal line on the substrate.

3. The display panel according to claim 1 or 2, characterized in that it further comprises a dam arranged in the non-display area, the dam is arranged around the display area, the dam passes through the first area, the second area and the third area in sequence, and the edge of the insulating layer extending from the display area to the second area is located on a side of the dam close to the display area and is spaced from the dam;

Preferably, the edge of the insulating layer extending from the display area to the first area, the second area and the third area is located on a side of the dam close to the display area; along the second direction, the space between the dam and the insulating layer constitutes a leveling area; the width of the leveling area in the second area is greater than the width of the leveling area in the third area;

Preferably, the dam includes part of the insulating layer, the insulating layer is provided with a first opening, the first opening is located between the dam and the display area, and the first opening is the leveling area; a vertical projection of the first opening on the substrate overlaps with vertical projections of the first area, the second area, and the third area on the substrate; in the second direction, portions of the first opening close to the edge of the display area located in the first area, the second area, and the third area are edges of the insulating layer extending from the display area to the first area, the second area, and the third area respectively;

Preferably, the dam includes a portion of the insulating layer, the insulating layer is provided with a first opening, the first opening is located between the dam and the display area, and the first opening is the leveling area; a vertical projection of the first opening on the substrate overlaps with a vertical projection of the second area on the substrate;

A vertical projection of the first opening on the substrate is spaced apart from a vertical projection of the third region on the substrate; and/or a vertical projection of the first opening on the substrate is spaced apart from a vertical projection of the first region on the substrate.

4 . The display panel according to claim 3 , wherein a width of the leveling area in the second area is greater than a width of the leveling area in the first area.

5. The display panel according to claim 3, wherein the dam comprises a first dam and a second dam, the second dam is arranged on a side of the first dam away from the display area; the first dam sequentially passes through the first area, the second area and the third area, and the leveling area is arranged between the first dam and the insulating layer;

Preferably, a protection zone is provided between the second dam and the first dam; the width of the protection zone along the second direction is smaller than the width of the leveling zone in the second zone;

Preferably, the display panel further comprises an organic encapsulation layer, and the first dam surrounds the organic encapsulation layer;

Preferably, the second dam sequentially passes through the first region, the second region and the third region; in the first region, the insulating layer is continuously provided at the gap between the first dam and the second dam; and/or, in the third region, the insulating layer is continuously provided at the gap between the first dam and the second dam;

Preferably, the first dam and the second dam include a portion of the insulating layer.

6. The display panel according to claim 1, wherein a vertical projection of the second area on the substrate is spaced apart from a vertical projection of the second signal line on the substrate, and a vertical projection of the second area on the substrate is spaced apart from a vertical projection of the first signal line on the substrate;

Preferably, the signals transmitted by the first signal line and the second signal line are the same or different;

Preferably, the first signal line and the second signal line transmit different signals, the display panel further comprises a light emitting device and a pixel circuit connected to the light emitting device, the first signal line is used to provide a first power supply signal to a cathode of the light emitting device; the second signal line is used to provide a second power supply signal to the pixel circuit;

Preferably, the non-display area includes a binding area; along the second direction, the first area, the second area and the third area are arranged between the binding area and the display area;

Preferably, the non-display area includes two first areas and two second areas; the two first areas are symmetrically arranged with respect to the third area, and the two second areas are symmetrically arranged with respect to the third area.

7. The display panel according to claim 1 or 2, characterized in that it further comprises a conductive layer, wherein the conductive layer is disposed on a side of the insulating layer away from the substrate, and the conductive layer extends from the display area to the non-display area; an edge of the insulating layer extending from the display area to the third area is located on a side of an edge of the conductive layer away from the display area;

Preferably, the edge of the insulating layer extending from the display area to the first area is located on a side of the edge of the conductive layer away from the display area;

Preferably, the conductive layer comprises a cathode layer, and the cathode layer is used to form a cathode of a light emitting device in a sub-pixel.

8. The display panel according to claim 1, characterized in that the signal transmission layer comprises a first signal transmission layer, the insulating layer comprises a first insulating layer, the first insulating layer is arranged on a side of the first signal transmission layer away from the substrate; the first signal transmission layer is used to form the first signal line and the second signal line; the edge of the first insulating layer extending from the display area to the second area is located on a side of the edge of the first insulating layer extending from the display area to the third area close to the display area;

Along the direction away from the substrate, the display panel includes a gate electrode layer, a capacitor plate layer, a first source-drain electrode layer, a first planarization layer, a second source-drain electrode layer, a second planarization layer and a pixel definition layer which are arranged in sequence;

The first signal transmission layer is the first source-drain electrode layer, and the first insulating layer includes at least one of the first planarization layer, the second planarization layer, and the pixel definition layer; or, the first signal transmission layer is the second source-drain electrode layer, and the first insulating layer includes at least one of the second planarization layer and the pixel definition layer.

9. The display panel according to claim 1, characterized in that the signal transmission layer includes a first signal transmission layer and a second signal transmission layer, the insulating layer includes a first insulating layer and a second insulating layer, the first insulating layer is arranged on a side of the first signal transmission layer away from the substrate, and the second signal transmission layer is arranged on a side of the first insulating layer away from the substrate; the second insulating layer is arranged on a side of the second signal transmission layer away from the substrate; an edge of the first insulating layer is located on a side of an edge of the second insulating layer close to the display area; in the second direction, the first signal transmission layer and the second signal transmission layer extend out of the edge of the first insulating layer, and a portion of the first signal transmission layer extending out of the first insulating layer overlaps a portion of the second signal transmission layer extending out of the first insulating layer; an edge of the second insulating layer extending from the display area to the second area is located on a side of an edge of the second insulating layer extending from the display area to the third area close to the display area;

Preferably, the edge of the second insulating layer extending from the display area to the second area is located on a side of the edge of the second insulating layer extending from the display area to the first area close to the display area;

Preferably, along a direction away from the substrate, the display panel includes a gate electrode layer, a capacitor plate layer, a first source-drain electrode layer, a first planarization layer, a second source-drain electrode layer, a second planarization layer, and a pixel definition layer arranged in sequence; the first signal transmission layer is the first source-drain electrode layer, the second signal transmission layer is the second source-drain electrode layer, the first insulating layer is the first planarization layer, and the second insulating layer includes at least one of the second planarization layer and the pixel definition layer;

Preferably, the first signal transmission layer comprises a first lower layer, a first middle layer and a first upper layer which are stacked, and the first lower layer, the first middle layer and the first upper layer are conductive layers;

Preferably, the material of the first lower layer and the first upper layer is titanium;

Preferably, the material of the first middle layer is aluminum;

Preferably, the second signal transmission layer comprises a second lower layer, a second middle layer and a second upper layer which are stacked, and the second lower layer, the second middle layer and the second upper layer are conductive layers;

Preferably, the material of the second lower layer and the second upper layer is titanium;

Preferably, the material of the second middle layer is aluminum.

10. A display panel, comprising a display area and a non-display area surrounding the display area; in a second direction, the non-display area located on one side of the display area comprises a wiring area and a second area arranged along a first direction, the display panel further comprising a signal line; the signal line is located in the wiring area and outside the second area; the display panel further comprises:

substrate;

A signal transmission layer, disposed on one side of the substrate, at least a portion of the signal transmission layer is used to form the signal line;

an insulating layer, wherein at least a portion of the insulating layer is disposed on a side of the signal transmission layer away from the substrate, and along the second direction, an edge of the insulating layer extending from the display area to the second area is located on a side of an edge of the insulating layer extending from the display area to the wiring area close to the display area; wherein the first direction intersects with the second direction; and a vertical projection of the edge of the insulating layer extending from the display area to the wiring area on the substrate overlaps with a vertical projection of the signal line on the substrate;

The conductive layer is disposed on the surface of the insulating layer away from the substrate.

11. The display panel according to claim 10, characterized in that the routing area includes a first area and a third area, and the first area, the second area and the third area are arranged along the first direction; the edge of the insulating layer extending from the display area to the second area is located on a side of the edge of the insulating layer extending from the display area to the third area close to the display area, and/or the edge of the insulating layer extending from the display area to the second area is located on a side of the edge of the insulating layer extending from the display area to the first area close to the display area;

Preferably, the conductive layer comprises a cathode layer.

12. A display device, comprising the display panel according to any one of claims 1 to 11.