A display panel and a display device

Abstract

The present invention discloses a display panel and a display device. The display panel includes a central region and a border region surrounding the central region; the border region includes an anti-crack grooving region and a scribe line region; and the scribe line region is disposed on a side of the anti-crack grooving region away from the central region; the display panel includes a substrate and multiple metal layers on the substrate; an insulating layer is disposed between adjacent two metal layers; the metal layer farthest from the substrate among the multiple metal layers is a first metal layer; all the insulating layers are removed in the scribe line region; an edge of the scribe line region close to the anti-crack grooving region is a first edge; an auxiliary trace is disposed on a side of the anti-crack grooving region close to the first edge along at least part of the edge of the first edge; the auxiliary trace is disposed at least on a second metal layer; and the second metal layer is disposed adjacent to the first metal layer. By adopting the technical solution of the present invention, the auxiliary trace is disposed on the edge of the anti-crack grooving region, so that the residue of the metal layer in the scribe line region can be avoided, thereby improving the yield of the display panel.

Description

Technical Field

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

[0002] With the continuous development of display technologies, display products are increasingly moving towards narrow bezels. To better achieve a lower narrow bezel for the display panel, in some display panels, a technology of arranging some fan-out lines in the display area (fanout in AA, FIAA) is adopted, so that the fan-out lines of the display product occupy a smaller area of the lower bezel.

[0003] However, the FIAA technology generally adds a metal layer M3, an organic film BPL3, and a metal layer M4 to the display panel. Currently, the design at the scribe line of the display panel is to completely remove the organic film. In this way, the step difference at the scribe line is further increased due to the newly added organic film BPL3, which easily causes the residue of the metal layer M4, resulting in problems such as signal short circuit and film layer rupture of the display panel, and affecting the yield of the display panel. Summary of the Invention

[0004] Embodiments of the present invention provide a display panel and a display device to reduce the step difference of the scribe line of the display panel and improve the yield of the display panel.

[0005] In a first aspect, embodiments of the present invention provide a display panel, including: a central region and a border region surrounding the central region;

[0006] The border region includes a crack prevention grooving area and a scribe line area; both the crack prevention grooving area and the scribe line area are arranged around the central region; and the scribe line area is arranged on a side of the crack prevention grooving area away from the central region;

[0007] The display panel includes a substrate and multiple metal layers on the substrate; an insulating layer is arranged between adjacent two metal layers; the metal layer farthest from the substrate among the multiple metal layers is a first metal layer; all the insulating layers are removed in the scribe line area;

[0008] An edge of the scribe line area close to the crack prevention grooving area is a first edge; on a side of the crack prevention grooving area close to the first edge, an auxiliary trace is arranged along at least a part of the edge of the first edge; the auxiliary trace is arranged at least on a second metal layer; the second metal layer is arranged adjacent to the first metal layer.

[0009] In a second aspect, embodiments of the present invention provide a display device, including the display panel described in the first aspect.

[0010] An embodiment of the present invention provides a display panel. The display panel includes a substrate and multiple metal layers on the substrate. An insulating layer is provided between adjacent two metal layers. Among the multiple metal layers, the layer farthest from the substrate is the first metal layer, and the metal layer adjacent to the first metal layer is the second metal layer. Further, the display panel includes a central region, a crack prevention grooving region and a scribing lane region surrounding the central region. The edge of the scribing lane region close to the crack prevention grooving region is the first edge, and at least part of the edge along the first edge is provided with an auxiliary trace on one side of the crack prevention grooving region close to the first edge. And the auxiliary trace is at least provided on the second metal layer. By adopting the technical solution provided by the embodiment of the present invention, through the setting of the auxiliary trace, the residue of the metal layer in the scribing lane region can be avoided, and problems such as signal short circuit and film layer rupture of the display panel can be avoided, thereby improving the yield rate of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 FIG. 6 is a schematic structural diagram of a display panel provided by the prior art;

[0012] Figure 2 is Figure 1 a schematic cross-sectional view along the A-A' direction in FIG. 6;

[0013] Figure 3 is Figure 1 another schematic cross-sectional view along the A-A' direction in FIG. 6;

[0014] Figure 4 FIG. 22 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0015] Figure 5 is Figure 4 a schematic cross-sectional view along the B-B' direction in FIG. 22;

[0016] Figure 6 is Figure 4 another schematic cross-sectional view along the B-B' direction in FIG. 22;

[0017] Figure 7 FIG. 38 is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0018] Figure 8 FIG. 42 is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0019] Figure 9 FIG. 46 is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0020] Figure 10 FIG. 50 is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0021] Figure 11Schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0022] Figure 12 Schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0023] Figure 13 Schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0024] Figure 14 is Figure 4 A schematic cross-sectional view along the B-B' direction in;

[0025] Figure 15 is Figure 4 A schematic cross-sectional view along the B-B' direction in;

[0026] Figure 16 is Figure 4 A schematic cross-sectional view along the B-B' direction in;

[0027] Figure 17 is Figure 6 An enlarged schematic view of area D in;

[0028] Figure 18 is Figure 6 Another enlarged schematic view of area D in;

[0029] Figure 19 Schematic structural diagram of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings instead of all the structures.

[0031] Figure 1 Schematic structural diagram of a display panel provided by the prior art, Figure 2 is Figure 1 A schematic cross-sectional view along the A-A' direction in, Figure 3 is Figure 1 Another schematic cross-sectional view along the A-A' direction in, reference Figures 1 to 3, in the existing display panel 10', it includes a central region 100' and a border region 200', and in the border region 200', it also includes a crack prevention region 210' and a scribe line region 220'. Among them, the border region 200' is arranged around the central region 100', and the crack prevention region 210' is closer to the central region 100' than the scribe line region 220'. Further, the display panel 10' also includes a substrate 300' and a multi-layer metal layer 400' on one side of the substrate 300', and an insulating layer 500' located between the metal layers 400'. And, Figure 2 and Figure 3 The array layer 600' in Figure 2 and Figure 3 is also arranged in the form of the multi-layer metal layer 400' and the insulating layer 500', which will not be specifically described here. Among them, the display panel 10' is prepared by cutting the scribe line region 220' on the display master, that is, at the position of the border region 200' of the display panel 10', there are positions where all the metal layers 400' and the insulating layer 500' are removed. Further, in order to better achieve the narrow border effect of the display panel 10', the technology of arranging part of the fan-out routing in the display area (fanout in AA, FIAA) can be adopted. Specifically, referring to Figure 2 and Figure 3 , the metal layer 410' in the display panel 10' can be the newly added metal layer 410' occupied by the fan-out routing. And when adding the metal layer 410', the insulating layer 500' between the metal layers 400' will also be increased. For example, Figure 2 and Figure 3 in, a new insulating layer 520' is added on the basis of the insulating layer 510'. Based on the fact that the insulating layer 510' and the insulating layer 520' have relatively large sizes along the thickness direction of the display panel 10', there will be a relatively thick "step structure" near the scribe line region 220'. Then referring to Figure 2 , when etching the metal layer 410', the developer 400A' coated above the metal layer 410' will accumulate near the central region 100' in the scribe line region 220', that is, the thickness of the developer 400A' is relatively large. Referring to Figure 3 , after etching the metal layer 410', part of the residual metal layer 410' is likely to remain in the scribe line region 220', and then there will be problems such as signal short-circuit and film layer rupture of the display panel 10', affecting the yield of the display panel 10'.

[0032] To solve the above problems, an embodiment of the present invention discloses a display panel and a display device. The display panel includes: a central region and a border region surrounding the central region; the border region includes an anti-crack grooving area and a scribe line area; both the anti-crack grooving area and the scribe line area are arranged around the central region; and the scribe line area is arranged on the side of the anti-crack grooving area away from the central region; the display panel includes a substrate and multiple metal layers on the substrate; an insulating layer is arranged between adjacent two metal layers; the metal layer farthest from the substrate among the multiple metal layers is the first metal layer; all the insulating layers are removed in the scribe line area; the edge of the scribe line area close to the anti-crack grooving area is the first edge; on one side of the anti-crack grooving area close to the first edge, an auxiliary trace is arranged along at least part of the edge of the first edge; the auxiliary trace is arranged at least on the second metal layer; the second metal layer is arranged adjacent to the first metal layer. By adopting the technical solution of the present invention, arranging the auxiliary trace at the edge of the anti-crack grooving area can avoid the residue of the metal layer in the scribe line area, thereby improving the yield of the display panel.

[0033] The above is the core idea of the present invention. Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0034] Figure 4 FIG. is a schematic structural diagram of a display panel provided by an embodiment of the present invention. Figure 5 is Figure 4 a schematic cross-sectional view taken along the B-B' direction in Figure 6 is Figure 4 another schematic cross-sectional view taken along the B-B' direction in, referring to Figures 4 to 6 , the display panel 10 provided by an embodiment of the present invention includes a central region 100 and a border region 200 surrounding the central region 100; the border region 200 includes an anti-crack grooving area 210 and a scribe line area 220; both the anti-crack grooving area 210 and the scribe line area 220 are arranged around the central region 100; and the scribe line area 220 is arranged on the side of the anti-crack grooving area 210 away from the central region 100; the display panel 10 includes a substrate 300 and multiple metal layers 400 on the substrate 300; an insulating layer 500 is arranged between adjacent two metal layers 400; the metal layer farthest from the substrate 300 among the multiple metal layers 400 is the first metal layer 400A; the insulating layer 500 removed in the scribe line area 220; the edge of the scribe line area 220 close to the anti-crack grooving area 210 is the first edge 221; on one side of the anti-crack grooving area 210 close to the first edge 221, an auxiliary trace 410 is arranged along at least part of the edge of the first edge 221; the auxiliary trace 410 is arranged at least on the second metal layer 400B; the second metal layer 400B is arranged adjacent to the first metal layer 400A.

[0035] Among them, the display panel 10 includes a central region 100 and a border region 200, and the border region 200 is arranged around the central region 100. The central region 100 includes a plurality of sub-pixels for display (not specifically shown in the figure) and a pixel driving circuit for driving the sub-pixels to display light emission (for example, the film layer structure 600 in the thickness direction of the display panel 10). Furthermore, functions such as the display and light emission of the display panel 10 are realized through the central region 100.

[0036] Furthermore, the border region 200 further includes a crack prevention grooving area 210 and a scribe line area 220, and both the crack prevention grooving area 210 and the scribe line area 220 are arranged around the central region 100. Specifically, during the preparation process of the display panel 10, a plurality of display panels 10 are arranged in an array on a display master (not specifically shown in the figure), and the plurality of display panels 10 are prepared by cutting and separating along the cutting line in the display master. The scribe line area 220 of the display panel 10 is the area where the cutting line is provided during cutting and separation. Furthermore, the crack prevention grooving area 210 includes intermittently arranged film layer structures 600. By setting the spaced film layer structures 600, the stress generated during cutting in the scribe line area 220 can be prevented from affecting the display and light emission effects of the central region 100, that is, the void area in the spaced film layer structures 600 can block the stress and prevent the cracks generated during the cutting process from spreading to the central region 100, thereby ensuring the stability of the overall structure of the display panel 10.

[0037] Furthermore, referring to Figure 5 and Figure 6 , the display panel 10 includes a substrate 300 and a multi-layer metal layer 400 on the substrate 300, and an insulating layer 500 is provided between adjacent two metal layers 400 to prevent short circuits and other situations between the metal layers 400. And Figure 5 and Figure 6 The film layer structure 600 in

[0038] Furthermore, in order to better achieve the narrow border effect of the display panel 10, the technology of arranging some fan-out routing in the display area (fanout in AA, FIAA) can be adopted. Specifically, referring to Figure 5 and Figure 6, the metal layer 400 in the display panel 10 includes a newly added metal layer 400A that serves as a fan-out trace, and the first metal layer 400A is the metal layer 400 in the metal layer 400 that is farthest from the substrate 300. And when adding the first metal layer 400A, an insulating layer 520 between the first metal layer 400A and the adjacent metal layer 400 will also be added, and the metal layer 400 adjacent to the first metal layer 400A is the second metal layer 400B, and the two sides of the second metal layer 400B are respectively the insulating layer 510 and the insulating layer 520. For example Figure 5 and Figure 6 In, when adding the first metal layer 400A, a new insulating layer 520 will be added on the basis of the original insulating layer 510. Further, the insulating layer 500 is removed in the scribe line area 220, thereby reducing the cutting difficulty during the cutting process of preparing the display panel 10. At the same time, based on the absence of the insulating layer 500 and the metal layer 400, the thickness of the scribe line area 220 is reduced, thereby ensuring the cutting accuracy and the yield of the prepared display panel 10.

[0039] Further, the materials of the insulating layers 520 and 510 in contact with the first metal layer 400A and the second metal layer 400B can be organic film layers. And based on the newly added first metal layer 400A and the insulating layer 520, in the thickness direction of the display panel 10, the thicknesses of the central area 100 and the anti-crack grooving area 210 will increase. The metal layer 400 and the insulating layer 500 in the display panel 10 are both prepared layer by layer. It should be noted that Figure 5 is a schematic structural diagram of setting the first metal layer 400A and coating the developer 400A1 and not completing the patterning process, Figure 6 is a schematic structural diagram of the first metal layer 400A completing the patterning process. As Figure 5 shown, when the first metal layer 400A is set without patterning etching, that is, when the first metal layer 400A still exists in both the anti-crack grooving area 210 and the scribe line area 220, the developer 400A1 for etching coated on the first metal layer 400A is prone to accumulate at the position of the anti-crack grooving area 210 close to the scribe line area 220, that is, at the position of the anti-crack grooving area 210 close to the first edge 221, in a similar "step structure", which is likely to cause residues of the first metal layer 400A in the scribe line area 220 and affect the etching effect of the first metal layer 400A.

[0040] Specifically, refer to Figure 5 and Figure 6, an auxiliary trace 410 can be provided on one side of the anti-crack grooving area 210 close to the first edge 221. The auxiliary trace 410 is provided along at least a part of the edge of the first edge 221, that is, the auxiliary trace 410 is provided at a position where there is an original "step structure". Based on the case of the relatively thick insulating layer 500, by providing the auxiliary trace 410, the situation that the thickness of the developing solution 400A1 is uneven due to the existence of a similar "step structure" at the scribe line area 220 and the first edge 221 is avoided from the root, thereby ensuring the etching effect of the first metal layer 400A. And the auxiliary trace 410 is at least provided on the second metal layer 400B, that is, it can contact the first metal layer 400A. At the same time, as Figure 5 shown, based on the provision of the auxiliary trace 410, and before laying the first metal layer 400A, a cavity is formed on the side of the auxiliary trace 410 away from the first edge 221 (refer to Figure 5 area C in the figure), so that when the first metal layer 400A is coated, the first metal layer 400A cannot be well filled into the cavity. Then, when the developing solution 400A1 is coated, the flow of the developing solution 400A1 is blocked here, thereby avoiding having a relatively thick developing solution 400A1 on the scribe line area 220, and also effectively avoiding the existence of a relatively thick developing solution 400A1 around the first edge 221 and even the entire scribe line area 220, which affects the etching effect of the first metal layer 400A. In other words, by providing the auxiliary trace 410, and a cavity is easily formed at the position of the auxiliary trace 410 away from the first edge 221, thereby blocking the flow of the developing solution 400A1, avoiding the existence of a relatively thick developing solution 400A1 in the area of the scribe line area 220 close to the first edge 221 and even the entire scribe line area 220. At the same time, based on the setting position of the auxiliary trace 410, a relatively thick developing solution 400A1 may accumulate at the position before the cavity, as Figure 5 shown, but Figure 5 the relatively thick developing solution 400A1 in the figure is on the plane, rather than in the groove formed by the scribe line area 220, making it easier for the developing solution 400A1 to remove the first metal layer 400A, and it is not easy to leave the first metal layer 400A in the cavity. Moreover, the thickness of the developing solution 400A1 at the scribe line area 220 is moderate and will not retain the first metal layer 400A, thereby preventing the display panel from generating cracks due to the residue of the first metal layer 400A, and further preventing the breakage of the metal signal lines in the display panel 10, ensuring the stable transmission of signals and the stable film layer structure in the display panel 10, and improving the yield of the display panel 10.

[0041] In summary, the display panel provided by the embodiment of the present invention avoids the accumulation of the developing solution in a relatively thick form when etching the first metal layer by providing an auxiliary trace at the edge of the anti-crack grooving area, thereby avoiding the residue of the metal layer in the scribe line area, and thus improving the yield of the display panel.

[0042] Figure 7 This is a schematic structural diagram of another display panel provided by an embodiment of the present invention. Refer to Figure 7 , the auxiliary trace 410 is arranged around the crack prevention grooving area 210 for one week.

[0043] Furthermore, refer to Figure 7 , both the crack prevention grooving area 210 and the scribe line area 220 are arranged around the central area 100, that is, there are both the crack prevention grooving area 210 and the scribe line area 220 around the periphery of the central area 100. Furthermore, the first edge 221 is also arranged around the central area 100 for one week. To avoid no residue of the first metal layer 400A in the scribe line area 220 around the central area 100 for one week, the auxiliary trace 410 can be arranged for one week. By arranging the auxiliary trace 410 around the crack prevention grooving area 210 for one week, it can be ensured that there is no residue of the first metal layer 400A in the entire scribe line area 220, thereby ensuring the stable transmission of the overall signal of the display panel 10, improving the stability between the film layers, and thus ensuring the yield rate of the display panel 10.

[0044] Figure 8 This is a schematic structural diagram of another display panel provided by an embodiment of the present invention. Refer to Figure 4 , Figure 7 and Figure 8 , the number of the auxiliary traces 410 is multiple; in the direction perpendicular to the first edge 221, the multiple auxiliary traces 410 are arranged in sequence.

[0045] Specifically, in the direction perpendicular to the first edge 221, the number of the auxiliary traces 410 can be multiple. In other words, in the direction from the central area 100 to the border area 200, the number of the auxiliary traces 410 can be multiple. Refer to Figure 4 and Figure 7 , in the direction perpendicular to the first edge 221, the number of the auxiliary traces 410 is one, Figure 4 the auxiliary trace 410 is not arranged at the entire first edge 221 in Figure 7 the auxiliary trace 410 is arranged at the entire first edge 221 in Figure 4 or Figure 7 's way, it can effectively avoid the residue of the first metal layer 400A in the scribe line area 220 and ensure the yield rate of the display panel 10. Furthermore, refer to Figure 8 , in the direction perpendicular to the first edge 221, the number of the auxiliary traces 410 is two, which further prevents the residue of the first metal layer 400A in the scribe line area 220 and better ensures the yield rate of the display panel 10. The embodiment of the present invention can further reduce the residue of the first metal layer 400A by increasing the number of the auxiliary traces 410. Exemplarily, Figure 8Taking only two auxiliary traces 410 as an example, more auxiliary traces 410 can be set in combination with the actual process and product size of the display panel 10. The embodiments of the present invention do not limit the specific number of the auxiliary traces 41.

[0046] Figure 9 FIG. is a schematic structural diagram of another display panel provided by an embodiment of the present invention. Figure 10 FIG. is a schematic structural diagram of another display panel provided by an embodiment of the present invention. Figure 11 FIG. is a schematic structural diagram of another display panel provided by an embodiment of the present invention. Continuing to refer to Figure 7 、 Figures 9 to 11 The auxiliary trace 410 is at least one of the following: linear, wavy, zigzag, and square wave.

[0047] Furthermore, in the display panel 10, while the number of the auxiliary traces 410 has diversity, the shape setting of the auxiliary traces 410 also has diversity. Specifically, referring to Figure 7 、 Figures 9 to 11 In Figure 7 the auxiliary trace 410 is linear and is attached to the first edge 221; in Figure 9 the auxiliary trace 410 is wavy and extends along the first edge 221; in Figure 10 the auxiliary trace 410 is zigzag and extends along the first edge 221; in Figure 11 the auxiliary trace 410 is zigzag and extends along the first edge 221. Furthermore, the auxiliary trace 410 can also have different shapes at different setting positions, that is, two or more of linear, wavy, zigzag, and square wave can be combined and set, which is not specifically shown in the figure. By enriching the shape of the auxiliary trace 410, the application range of the auxiliary trace 410 can be improved, the universality can be improved, and further the types of the display panel 10 adopting the auxiliary trace 410 can be increased. For example, it can also be applicable to various special-shaped display panels 10. The embodiments of the present invention do not specifically limit this.

[0048] Figure 12 FIG. is a schematic structural diagram of another display panel provided by an embodiment of the present invention. Referring to Figure 12 the auxiliary trace 410 includes a plurality of auxiliary trace segments 411; the plurality of auxiliary trace segments 411 are arranged in sequence along the first edge 221.

[0049] Furthermore, referring to Figure 4 and Figure 7 the auxiliary trace 410 can be a continuous integrated conductive structure. Referring to Figure 12The auxiliary wiring 410 can also be discontinuously arranged, formed by a plurality of auxiliary wiring ends 411, further enriching the arrangement of the auxiliary wiring 410. The auxiliary wiring 410 is formed discontinuously by a plurality of auxiliary wiring ends 411, so that the stress generated during the preparation of the auxiliary wiring 410 can be released, thereby ensuring that the auxiliary wiring 410 is stably present at the first edge 221, ensuring the flatness of the overall structure of the display panel 10, and also ensuring that the cutting area 220 does not leave the first metal layer 400A that has not been etched cleanly, thereby ensuring the yield rate of the display panel 10.

[0050] Figure 13 A schematic diagram of another display panel provided by an embodiment of the present invention, referring to Figure 13 The auxiliary routing segment 411 includes a first auxiliary routing segment 411A and a second auxiliary routing segment 411B; along the direction of the first edge 221, the first auxiliary routing segment 411A and the second auxiliary routing segment 411B are alternately arranged; in the direction perpendicular to the first edge 221, there is a set spacing L between the extension line of the first auxiliary routing segment 411A and the extension line of the second auxiliary routing segment 411B.

[0051] Specifically, the auxiliary wiring 410 may also be discontinuously arranged, and the discontinuous auxiliary wiring 410 may be arranged in various ways. Figure 12 , the auxiliary wiring segments 411 are all arranged close to the first edge 211, and two adjacent auxiliary wiring segments 411 are not connected, that is, the auxiliary wiring segments 411 are arranged discontinuously. Figure 13 The auxiliary routing segment 411 includes a first auxiliary routing segment 411A and a second auxiliary routing segment 411B. The first auxiliary routing segment 411A and the second auxiliary routing segment 411B are arranged alternately along the extension direction of the first edge 221, that is, along the extension direction of the first edge 221, the second auxiliary routing segment 411B is arranged between two adjacent first auxiliary routing segments 411A, and the first auxiliary routing segment 411A is arranged between two adjacent second auxiliary routing segments 411B. By setting the first auxiliary routing segment 411A and the second auxiliary routing segment 411B, it is equivalent to that the auxiliary routing segment 411 also encloses the entire cutting road area 220, thereby alleviating the stress that may exist in the auxiliary routing 410, and better avoiding the residue of the first metal layer 400A in the cutting road area 220, thereby ensuring a high yield rate of the display panel 10.

[0052] For further reference, Figure 13 , perpendicular to the direction of the first edge 221, there is a set spacing L between the extension line of the first auxiliary routing segment 411A and the extension line of the second auxiliary routing segment 411B, that is, the first auxiliary routing segment 411A and the second auxiliary routing segment 411B are distributed in the anti-crack groove area 210 close to the first edge 221 in a staggered manner.

[0053] Figure 14 is Figure 4 a schematic cross-sectional view along the B-B' direction in, reference Figure 14 , the display panel 10 includes: a substrate 300; a pixel driving circuit layer 600A; the pixel driving circuit layer 600A includes a plurality of alternately arranged inorganic insulating layers 610 and third metal layers 620; a first organic insulating layer 510 disposed on a side of the pixel driving circuit layer 600A away from the substrate 300; a second metal layer 400B disposed on a side of the first organic insulating layer 510 away from the substrate 300; a second organic insulating layer 520 disposed on a side of the second metal layer 400B away from the substrate 300; a first metal layer 400A disposed on a side of the second organic insulating layer 520 away from the substrate 300; at least one anti-crack groove 211 is provided in the anti-crack grooving area 210; the inorganic insulating layer 610 removed in the anti-crack groove 211; a scribing lane area 220 is provided with a scribing lane 222; the inorganic insulating layer 610, the first organic insulating layer 510 and the second organic insulating layer 520 removed in the scribing lane 222.

[0054] Specifically, reference Figure 14 , the display panel 10 includes a substrate 300 and a pixel driving circuit layer 600A located on one side of the substrate 300. Among them, the pixel driving circuit layer 600A is equivalent to Figure 6 the film layer structure 600 in, here the pixel driving circuit layer 600A is slightly expanded and described, specifically, reference Figure 14 , the pixel driving circuit 600A includes alternately arranged inorganic insulating layers 610 and third metal layers 620, the third metal layer 620 includes a first A metal layer 623, a first B metal layer 622 and a first C metal layer 621, and the first A metal layer 623 can be used as the gate electrode layer of the transistor in the pixel driving circuit 600A, the first B metal layer 622 is used as the capacitor substrate of the transistor in the pixel driving circuit 600A, the first C metal layer 623 is used as the source-drain electrode layer of the transistor in the pixel driving circuit 600A, and an inorganic insulating layer 610 is provided between two adjacent third metal layers 620, which can ensure the normal and stable transmission of signals in the display panel 10.

[0055] Furthermore, the display panel 10 further includes a second metal layer 400B and a first metal layer 400A, which facilitates routing some of the fan-out traces in the display panel 10 through the first metal layer 400A and the second metal layer 400B and arranging them in the central region 100, achieving the effect of a narrow border for the display panel 10. Specifically, when adding a new metal layer, an insulating layer also needs to be added to avoid short circuits between metal layers and thus avoid affecting the signal transmission in the display panel 10. Specifically, the first organic insulating layer 510 is located on the side of the pixel driving circuit layer 600A away from the substrate 300. The second metal layer 400B is coated and etched on the first organic insulating layer 510. The second organic insulating layer 520 is located on the side of the second metal layer 400B away from the substrate 300. The first metal layer 400A is coated and etched on the second organic insulating layer 520.

[0056] Furthermore, referring to Figure 14 , at least one anti-crack groove 211 is provided in the anti-crack grooving area 210 of the display panel 10, and the inorganic insulating layer 610 removed in the anti-crack groove 211, thereby realizing the shape of the groove. At least one anti-crack groove 211 can block the cutting cracks formed when cutting the display master to form the display panel 10 in the scribe line area 220, avoiding the cracks from extending to the central region 100 and causing the breakage of the signal lines in the circuit layer, which affects the yield of the display panel 10.

[0057] Furthermore, a scribe line 222 is provided in the scribe line area 220. The scribe line 222 is used to provide the area where the cutting line is located, that is, to realize the cutting of multiple display panels 10 by the cutting line provided by the scribe line 222 on the display master. In the scribe line 222, the inorganic insulating layer 610, the first organic insulating layer 510, and the second organic insulating layer 520 are removed, and thus the first metal layer 400A and the second metal layer 400B do not exist either, ensuring the accuracy of cutting. In the display panel 10 provided by the embodiment of the present invention, by providing the auxiliary trace 410 near the first edge 221, it is possible to avoid the accumulation of the developing solution when etching the first metal layer 400A due to the additional organic insulating layer, and further avoid the remaining part of the first metal layer 400A in the scribe line area 220, thereby ensuring the overall yield of the display panel 10.

[0058] Figure 15 For Figure 4 a cross-sectional schematic view along the B-B' direction in Figure 15 , at least one third metal layer 620 in the third metal layer 620 close to the second metal layer 400B is provided with an auxiliary trace 410; in a plane parallel to the plane where the substrate 300 is located, the auxiliary traces 410 in each adjacent two layers of the second metal layer 400B and the third metal layer 620 at least partially overlap.

[0059] Specifically, referring to Figure 6 , the auxiliary routing 410 can be disposed in the second metal layer 400B to avoid metal residue in the dicing channel area 220 during the etching of the first metal layer 400A. Further, the auxiliary routing 410 can also be disposed in the third metal layer 620. Exemplarily, referring to Figure 15 , the auxiliary routing 410 is disposed on the side of the third metal layer 620 close to the second metal layer 400B, that is, the first C metal layer 621 in the third metal layer 620 is set as the auxiliary routing 410 to avoid residue of the first metal layer 400A in the dicing channel area 220. That is, on the basis of enriching the setting shape of the auxiliary routing 410, the position of the metal film layer where the auxiliary routing 410 is located can also be enriched. By using the metal layer in the third metal layer 620 as the auxiliary routing 410, and at least partial overlap of the auxiliary routing 410 in each adjacent two layers of the second metal layer 400B and the third metal layer 620, the auxiliary routing 410 is prone to form a side etching structure, and there are voids at the position where the side etching structure interfaces with other film layers, effectively preventing the developer from flowing into the dicing channel area. Furthermore, the thickness of the developer can be reduced at the first edge 221 of the dicing channel area, avoiding the accumulation of the developer for etching the first metal layer 400A, thereby ensuring that the first metal layer 400A in the dicing channel area 220 is completely etched without residue of the first metal layer 400A, and ensuring the yield of the display panel 10.

[0060] Figure 16 For Figure 4 a cross-sectional schematic diagram along the B-B' direction in Figure 16 , the display panel 10 includes: a substrate 300; a pixel driving circuit layer 600A; the pixel driving circuit layer 600A includes multiple layers of alternately arranged inorganic insulating layers 610 and a third metal layer 620; the layer in the third metal layer 620 farthest from the substrate 300 is the second metal layer 400B; a first organic insulating layer 510, disposed on the side of the pixel driving circuit layer 600A away from the substrate 300; a first metal layer 400A, disposed on the side of the first organic insulating layer 510 away from the substrate 300; at least one anti-crack groove 211 is provided in the anti-crack groove area 210; the inorganic insulating layer 610 removed in the anti-crack groove 211; a dicing channel 222 is provided in the dicing channel area 220; all the inorganic insulating layers 610 and the first organic insulating layer 510 are removed in the dicing channel 222.

[0061] Specifically, referring to Figure 16 , the display panel 10 includes a substrate 300 and a pixel driving circuit layer 600A on one side of the substrate 300. Among them, the pixel driving circuit layer 600A is Figure 6 the film layer structure 600 in Figure 16, the pixel driving circuit 600A includes an inorganic insulating layer 610 and a third metal layer 620 which are alternately arranged. The third metal layer 620 includes multiple metal layers. In the figure, the second metal layer 400B in the third metal layer 620 is taken as an example for illustration, where the second metal layer 400B is the metal film layer in the third metal layer 620 that is farthest from the substrate 300.

[0062] Furthermore, the display panel 10 further includes a first metal layer 400A, which is convenient for realizing the layout of some fan-out traces in the display panel 10 through the first metal layer 400A in the central region 100, so as to achieve the effect of a narrow border of the display panel 10. Specifically, when adding a new metal layer, an insulating layer also needs to be added to avoid short circuits between metal layers, thereby affecting the signal transmission in the display panel 10. Specifically, the first organic insulating layer 510 is located on the side of the pixel driving circuit layer 600A away from the substrate 300, and the first metal layer 400A is formed by coating and etching on the first organic insulating layer 510.

[0063] Furthermore, referring to Figure 16 , at least one anti-crack groove 211 is provided in the anti-crack grooving area 210 of the display panel 10, and the inorganic insulating layer 610 removed in the anti-crack groove 211, so as to realize the shape of the groove. At least one anti-crack groove 211 can relieve the cutting cracks generated during the cutting of the display master to form the display panel 10 in the cutting channel area 220, which affects the yield of the display panel 10.

[0064] Furthermore, a cutting channel 222 is provided in the cutting channel area 220. The cutting channel 222 is used to provide the area where the cutting line is located, that is, to realize the cutting of multiple display panels 10 by the cutting line provided by the cutting channel 222 of the display master. In the cutting channel 222, the inorganic insulating layer 610 and the first organic insulating layer 510 are removed, and further, the first metal layer 400A does not exist either, ensuring the cutting accuracy and effectively preventing cutting cracks caused by the residue of the first metal layer 400A. For the display panel 10 provided by the embodiment of the present invention, by setting the auxiliary trace 410 near the first edge 221, it is possible to avoid the accumulation of the developing solution when etching the first metal layer 400A due to the additional organic insulating layer, and further avoid the retention of a part of the first metal layer 400A in the cutting channel area 220, thereby ensuring the overall yield of the display panel 10.

[0065] Figure 17 For Figure 6 an enlarged schematic view of region D in Figure 18 For Figure 6 another enlarged schematic view of region D in Figure 17 and Figure 18, the auxiliary trace 410 includes a bottom surface 410A close to the substrate 300, a top surface 410B far from the substrate 300, and a side surface 410C connecting the bottom surface 410A and the top surface 410B; the side surface 410C of the auxiliary trace 410 is a concave surface; alternatively, the side surface 410C of the auxiliary trace 410 forms a side-etched groove.

[0066] Specifically, the auxiliary trace 410 includes a bottom surface 410A, a top surface 410B, and a side surface 410C connecting the bottom surface 410A and the top surface 410B, and the shape of the side surface 410C of the auxiliary trace 410 has diversity and can be, for example, Figure 17 the concave surface shape shown, or can be, for example, Figure 18 the groove shape shown. The embodiments of the present invention do not specifically limit this. When the side surface 410C is a groove or a concave surface, it can ensure that voids are better formed on the side of the auxiliary trace 410 far from the first edge 221, blocking the flow of the developer for etching the first metal layer 400A, thereby ensuring that there is no residue of the first metal layer 400A in the scribe line area 220 due to the relatively thick developer, and further ensuring the yield of the display panel 10.

[0067] Continue to refer to Figure 5 and Figure 6 , in a plane parallel to the plane where the substrate 300 is located, the insulating layer 500 between the second metal layer 400B and the first metal layer 400A does not overlap with the auxiliary trace 410.

[0068] Specifically, the auxiliary trace 410 can be disposed on the second metal layer 400B. Refer to Figure 5 and Figure 6 , at the position where the auxiliary trace 410 is not disposed on the second metal layer 400B, the first metal layer 400A and the second metal layer 400B are isolated by an insulating layer, and at the position where the auxiliary trace 410 is disposed on the second metal layer 400B, that is, near the first edge 221, the first metal layer 400A is in contact with the second metal layer 400B before etching, that is, the insulating layer 500 between the second metal layer 400B and the first metal layer 400A does not overlap with the auxiliary trace 410, facilitating depositing the first metal layer 400A on the auxiliary trace 410, resulting in a discontinuity of the first metal layer 400A also at the auxiliary trace 410, thereby preventing the developer for etching the first metal layer 400A from overflowing to the scribe line area 220, that is, reducing the thickness of the developer in the scribe line area 220, and further effectively preventing the residue of the first metal layer 400A in the scribe line area 220, and further ensuring the yield of the display panel 10.

[0069] Based on the same inventive concept, the embodiments of the present invention also provide a display device. Figure 19 is a schematic structural diagram of a display device provided by the embodiments of the present invention. AsFigure 19 , the display device 1 includes the display panel 10 described in any of the above embodiments. Therefore, the display device 1 provided by the embodiments of the present invention has the corresponding beneficial effects in the above embodiments, which will not be elaborated here. Exemplarily, the display device 1 may be an electronic device such as a mobile phone, a computer, a smart wearable device (e.g., a smart watch), and an in-vehicle display device, etc., and the embodiments of the present invention do not limit this.

[0070] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that, Comprising: A central region and a border region surrounding the central region; The border region includes a crack prevention grooving area and a scribing lane area; both the crack prevention grooving area and the scribing lane area are arranged around the central region; and the scribing lane area is arranged on a side of the crack prevention grooving area away from the central region; The display panel includes a substrate and multiple metal layers on the substrate; an insulating layer is arranged between adjacent two metal layers; the metal layer farthest from the substrate among the multiple metal layers is a first metal layer; all the insulating layers are removed in the scribing lane area; An edge of the scribing lane area close to the crack prevention grooving area is a first edge; on a side of the crack prevention grooving area close to the first edge, an auxiliary trace is arranged along at least part of the edge of the first edge; the auxiliary trace is arranged on at least a second metal layer; the second metal layer is adjacent to the first metal layer; A void is formed on a side of the auxiliary trace away from the first edge.

2. The display panel according to claim 1, wherein The auxiliary trace is arranged around the crack prevention grooving area for one week.

3. The display panel according to claim 1, wherein The number of the auxiliary traces is multiple; In a direction perpendicular to the first edge, the multiple auxiliary traces are arranged in sequence.

4. The display panel according to claim 1, wherein The auxiliary trace is at least one of the following: linear, wavy, serrated and square wave shaped.

5. The display panel according to claim 1, wherein The auxiliary trace includes multiple auxiliary trace segments; The multiple auxiliary trace segments are arranged in sequence along the first edge.

6. The display panel according to claim 5, wherein The auxiliary trace segment includes a first auxiliary trace segment and a second auxiliary trace segment; In a direction along the first edge, the first auxiliary trace segment and the second auxiliary trace segment are arranged alternately; in a direction perpendicular to the first edge, a set distance exists between an extension line of the first auxiliary trace segment and an extension line of the second auxiliary trace segment.

7. The display panel according to claim 1, wherein The display panel includes: a substrate; A pixel driving circuit layer; the pixel driving circuit layer includes multiple alternately arranged inorganic insulating layers and third metal layers; A first organic insulating layer, arranged on a side of the pixel driving circuit layer away from the substrate; The second metal layer, arranged on a side of the first organic insulating layer away from the substrate; A second organic insulating layer, arranged on a side of the second metal layer away from the substrate; The first metal layer, arranged on a side of the second organic insulating layer away from the substrate; At least one crack prevention groove is arranged in the crack prevention grooving area; all the inorganic insulating layers are removed in the crack prevention groove; A scribing lane is arranged in the scribing lane area; all the inorganic insulating layers, the first organic insulating layer and the second organic insulating layer are removed in the scribing lane.

8. The display panel according to claim 7, wherein At least one third metal layer close to the second metal layer in the third metal layers is provided with the auxiliary trace; In a plane parallel to the plane where the substrate is located, the auxiliary traces in each adjacent two of the second metal layer and the third metal layers overlap at least partially.

9. The display panel according to claim 1, characterized in that The display panel includes: a substrate; A pixel driving circuit layer; the pixel driving circuit layer includes multiple alternately arranged inorganic insulating layers and third metal layers; the metal layer farthest from the substrate among the third metal layers is the second metal layer; A first organic insulating layer, arranged on a side of the pixel driving circuit layer away from the substrate; The first metal layer is disposed on a side of the first organic insulating layer away from the substrate; At least one anti-crack groove is provided in the anti-crack grooving area; all inorganic insulating layers are removed within the anti-crack groove; A dicing channel is provided in the dicing channel area; all inorganic insulating layers and the first organic insulating layer are removed within the dicing channel.

10. The display panel according to claim 1, characterized in that, The auxiliary trace includes a bottom surface close to the substrate side, a top surface away from the substrate side, and a side surface connecting the bottom surface and the top surface; The side surface of the auxiliary trace is a concave surface; or, Side etching grooves are formed on the side surface of the auxiliary trace.

11. The display panel according to claim 1, wherein, In a plane parallel to the plane where the substrate is located, the insulating layer between the second metal layer and the first metal layer does not overlap with the auxiliary trace.

12. A display device, characterized in that, A display panel including any one of the above-mentioned claims 1-11.

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