Display panel and display mother board

Abstract

The present invention provides a display panel and a display mother board. The display panel includes a display area and a non-display area located on at least one side of the display area. The display panel includes: a substrate; a first conductive layer located on the substrate; an interlayer insulating layer located on the first conductive layer; and a second conductive layer located on the interlayer insulating layer, including a trace terminal located in the non-display area, and the trace terminal further includes a main body portion located in the non-display area; wherein, the trace terminal further includes a patterned portion connected to one end of the main body portion away from the display area. In the present invention, since the end of the trace terminal away from the display area is patterned to form a patterned portion, the probability of peeling between the second conductive layer and the adjacent interlayer insulating layer is reduced, thereby effectively reducing the influence of the cutting and chipping process on the display effect of the prepared display panel.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a display panel and a display mother board. Background Art

[0002] In the production process of a display panel, multiple display panels are usually formed on a large board first, and then the large board is cut to obtain multiple independent display panels. However, during the cutting process, cracks are likely to occur near the cutting channels. If the cracks extend to the display area of the display panel, the functional film layer will be damaged, thereby affecting the display quality of the display panel.

[0003] In the prior art, a crack stop design is usually carried out inside the cutting channels to prevent the extension of cracks. Currently, the crack stop design mainly focuses on the inorganic layer grooving design, which has the problem of poor crack protection. At the same time, the metal layer and the passivation layer will peel off along with the cracks.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the Invention

[0005] Embodiments of the present invention provide a display panel and a display mother board to solve the problem of peeling of the metal layer and the passivation layer that easily occur during the cutting and scribing process of the existing display panel.

[0006] An embodiment of the present invention provides a display panel, including a display area and a non-display area located on at least one side of the display area, wherein it includes:

[0007] A substrate;

[0008] A first conductive layer located on the substrate;

[0009] An interlayer insulating layer located on the first conductive layer; and

[0010] A second conductive layer located on the interlayer insulating layer, including a wiring terminal located in the non-display area, and the wiring terminal further includes a main body portion located in the non-display area;

[0011] Wherein, the wiring terminal further includes a patterned portion connected to one end of the main body portion away from the display area.

[0012] In some embodiments of the present invention, a first through hole is provided on the wiring of the patterned portion.

[0013] In some embodiments of the present invention, a first passivation layer and a second passivation layer located on the second conductive layer are further included, and the first through hole communicates with a second through hole that penetrates through the first passivation layer and the second passivation layer.

[0014] In some embodiments of the present invention, the ratio of the diameter of the first through hole to the width of the trace of the patterned portion is greater than 2:3 and less than 1.

[0015] In some embodiments of the present invention, the patterned portion includes two first connection lines connected to the main body portion and spaced apart.

[0016] In some embodiments of the present invention, the two first connection lines are arranged parallel to the trace of the main body portion.

[0017] In some embodiments of the present invention, the included angle between the two first connection lines and the trace of the main body portion is 0-40°.

[0018] In some embodiments of the present invention, the patterned portion includes two second connection lines connected to the main body portion and spaced apart, and a third connection line connected between the two second connection lines. The third connection line includes a plurality of first connection portions and a plurality of second connection portions that intersect. Each second connection portion includes an opposite first end and a second end. At least one first connection portion is connected between the first end of the corresponding second connection portion and the second end of the connection portion adjacent to the corresponding connection portion, and at least one first connection portion is connected to one of the second connection lines at the connection with the first end of the corresponding second connection portion, and at least one first connection portion is connected to the other second connection line at the connection with the second end of the corresponding second connection portion.

[0019] In some embodiments of the present invention, the adjacent first connection portion and the second connection portion have equal lengths, and the included angle between the adjacent first connection portion and the second connection portion is 45°.

[0020] Embodiments of the present invention further provide a display mother board, including a plurality of the display panels, a cutting area located outside the display panel, and a connection area between the cutting area and the display panel. The display mother board includes:

[0021] A substrate;

[0022] A first conductive layer located on the substrate;

[0023] An interlayer insulating layer located on the first conductive layer; and

[0024] A second conductive layer located on the interlayer insulating layer, including a trace terminal, and the trace terminal includes a main body portion located in the connection area;

[0025] Wherein, the trace terminal further includes a patterned portion located in the cutting area and connected to the main body portion.

[0026] In the display panel provided by the embodiment of the present invention, since the end of the wiring terminal away from the display area is patterned to form the patterned portion, the shape of the wiring of the patterned portion is different from the shape of the wiring of the main body portion. On the cut surface of the display panel, the second conductive layer is an uneven cut surface with a convex region and a concave region. Therefore, the probability of peeling between the second conductive layer and the interlayer insulating layer adjacent to the second conductive layer is reduced, thereby effectively reducing the influence of the cutting and chipping process on the display effect of the prepared display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0029] Figure 2 is a schematic cross-sectional view of a non-display area of a display panel provided by an embodiment of the present invention;

[0030] Figure 3 is a schematic structural diagram of a display mother board provided by an embodiment of the present invention;

[0031] Figure 4 is a schematic cross-sectional view of a display mother board provided by an embodiment of the present invention;

[0032] Figure 5 is a schematic structural diagram of a patterned portion on a display mother board provided by an embodiment of the present invention;

[0033] Figure 6 is another schematic cross-sectional view of a non-display area of a display panel provided by an embodiment of the present invention;

[0034] Figure 7 is another schematic structural diagram of a patterned portion on a display mother board provided by an embodiment of the present invention;

[0035] Figure 8 is another schematic structural diagram of a patterned portion on a display mother board provided by an embodiment of the present invention;

[0036] Figure 9 is another schematic structural diagram of a patterned portion on a display mother board provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise stated, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the drawings; while "inner" and "outer" refer to the outline of the device.

[0038] As Figure 1 shown, in the process of manufacturing the display panel, a plurality of small-sized display panels 10 are simultaneously manufactured in a large-sized display mother board 20, and then a plurality of independent small-sized display panels 10 are obtained by cutting and dicing the display mother board 20. However, when cutting the display mother board 20 by the existing cutting process, the probability of peeling of the metal traces provided on the same layer as the source electrode and the drain electrode on the cutting surface of the obtained small-sized display panel 10, and the passivation layer adjacent to the metal traces is high, thereby easily affecting the display effect of the small-sized display panel 10.

[0039] As Figure 2 shown, an embodiment of the present invention provides a display panel, including a display area and a non-display area located on at least one side of the display area. Wherein, the display panel includes: a substrate substrate 100; a first conductive layer located on the substrate substrate 100; an interlayer insulating layer 200 located on the first conductive layer; and a second conductive layer 300 located on the interlayer insulating layer 200, including a trace terminal located in the non-display area, and the trace terminal further includes a main body portion located in the non-display area; wherein, the trace terminal further includes a patterned portion connected to one end of the main body portion and away from the display area.

[0040] It should be noted that since the cutting and dicing process of the display panel is performed in the non-display area, Figure 2 shown in is the cross-sectional structure of the non-display area of the display panel, and the first conductive layer only exists in the display area. Therefore, in Figure 2 the structure of the first conductive layer is not shown. Wherein, the first conductive layer is the layer where the gate is located, and the second conductive layer 300 is the layer where the source electrode and the drain electrode are located.

[0041] Among them, both the first conductive layer and the second conductive layer 300 are metal layers. The first conductive layer can also be referred to as the first metal layer, and the second conductive layer 300 can also be referred to as the second metal layer. In this embodiment, since the end of the wiring terminal away from the display area is patterned to form the patterned portion, the shape of the wiring in the patterned portion is different from the shape of the wiring in the main body portion. On the cut surface of the display panel, the second conductive layer 300 has an uneven cut surface with a convex region and a concave region. Therefore, the probability of peeling between the second conductive layer 300 and the interlayer insulating layer 200 adjacent to the second conductive layer 300 is reduced, thereby effectively reducing the influence of the cutting and dicing process on the display effect of the prepared display panel.

[0042] Since the display panel is obtained by cutting the display mother board, as Figure 3 shown, an embodiment of the present invention provides a display mother board, including a plurality of the foregoing display panels, a cutting area 30 located outside the display panels, and a connection area 40 between the cutting area 30 and the display panels.

[0043] Specifically, as Figure 4 shown, the display mother board includes: a substrate 100; a first conductive layer 400 located on the substrate 100; an interlayer insulating layer 200 located on the first conductive layer 400; and a second conductive layer 300 located on the interlayer insulating layer 200, including a wiring terminal 310, and the wiring terminal 310 includes a main body portion 310a located in the connection area 40; among them, the wiring terminal 310 further includes a patterned portion 310b located in the cutting area 30 and connected to the main body portion 310a.

[0044] It can be understood that the foregoing display panel is the display panel prepared from the display mother board through the cutting and dicing process. Among them, the patterned portion of the wiring terminal of the display panel, which is connected to the main body portion and is at the end away from the display area, is a part of the patterned portion 310b on the display mother board. After the cutting and dicing process, the patterned portion 310b between two adjacent display panels is broken, and each of the two adjacent display panels occupies a part of the patterned portion 310b after the cutting and dicing process.

[0045] The following will describe in detail the patterned portion of the display panel after cutting in combination with the specific structure of the patterned portion 310b of the display mother board before the display panel is cut. It should be noted that in the following statements, the patterned portion refers to the patterned portion of the display panel after cutting, while the patterned portion 310b refers to the patterned portion on the display mother board between two adjacent display panels, and the main body portion refers to the main body portion of the display panel after cutting, while the main body portion 310a refers to the main body portion within the connection area 40 on one side of the display panel on the display mother board.

[0046] In one embodiment, a first through hole is provided on the trace of the patterned portion.

[0047] As Figure 5 shown, Figure 5 FIG. 10 is a schematic structural diagram of the patterned portion 310b of the display mother board before the display panel is cut. Three first through holes 320 with the same aperture are provided on the trace of the patterned portion 310b. When the display mother board is cut along the cutting area 30, the structure of the first through hole 320 in the middle position is damaged, and the patterned portion 310b is divided into two parts, that is, the patterned portions on the two display panels. The patterned portion includes a complete first through hole 320 and a partial structure of the first through hole 320 in the middle position after being damaged.

[0048] Among them, in this embodiment, the more the number of the first through holes 320 in the patterned portion 310b of the display mother board, the more the hollow structure in the patterned portion 310b, which is more conducive to the fracture of the patterned portion 310b during the cutting process. Therefore, when multiple first through holes 320 are provided in the patterned portion 310b, the first through holes 320 are naturally also provided on the trace of the patterned portion of the display panel after cutting, and the number of the first through holes 320 can be single or multiple. Specifically, it depends on the number of the first through holes 320 in the patterned portion 310b on the display mother board.

[0049] Furthermore, in this embodiment, the ratio of the diameter of the first through hole 320 to the width of the trace of the patterned portion is greater than 2:3 and less than 1. Since the trace of the patterned portion of the display panel is the trace of the patterned portion 310b of the display mother board after cutting, the ratio of the diameter of the first through hole 320 to the width of the trace of the patterned portion 310b of the display mother board is also greater than 2:3 and less than 1.

[0050] Among them, the larger the diameter of the first through hole 320, the easier it is for the patterned portion 310b of the display mother board to break from the first through hole 320 in the middle position, thereby reducing the probability of peeling between the second conductive layer 300 and the interlayer insulating layer 200 in the display panel prepared by the cutting and splitting process.

[0051] Further, as Figure 6 shown, the display panel further includes a first passivation layer 500 and a second passivation layer 600 located on the second conductive layer 300, and the first through hole 320 communicates with a second through hole 510 that penetrates through the first passivation layer 500 and the second passivation layer 600.

[0052] Understandably, the first through hole 320 and the second through hole 510 are located in the cutting area 30 on the display mother board. When a plurality of the first through holes 320 and the second through holes 510 that communicate and penetrate are provided in the cutting area 30, it is more conducive to the cutting and splitting process of the display mother board.

[0053] Among them, since a plurality of the first through holes 320 and the second through holes 510 that communicate and penetrate are provided in the cutting area 30 of the display mother board, there will naturally be some undamaged first through holes 320 and second through holes 510 on the cut display panel. Therefore, the display panel further includes the first through hole 320 and the second through hole 510 that communicate and penetrate.

[0054] In another embodiment, the patterned portion includes two first connection lines connected to the main body portion and arranged at intervals, and the two first connection lines are arranged parallel to the traces of the main body portion.

[0055] As Figure 7 shown, Figure 7 is a schematic structural diagram of the patterned portion 310b of the display mother board. In this embodiment, the sum of the widths of the two first connection lines 700 on the display mother board is smaller than the width of the trace of the patterned portion 310b. Therefore, during the cutting and splitting of the display mother board, the trace of the patterned portion 310b is likely to break, thereby reducing the probability of peeling between the metal layer and the passivation layer and improving the display performance of the cut display panel.

[0056] Specifically, when the patterned portion 310b of the display mother board breaks, the patterned portion of the display panel is shown as having two first connection lines 700 connected to the main body portion and arranged at intervals, and the two first connection lines 700 are arranged parallel to the traces of the main body portion.

[0057] Further, as Figure 8As shown, the first connection line 700 of the patterned portion 310b of the display mother board includes two connection lines 710 and 720 that are connected to each other, and the two connection lines 710 and 720 are of equal length.

[0058] Understandably, when the first connection line 700 includes the two connection lines 710 and 720 that are connected to each other, during the process of cutting and dicing the display mother board, the intersection of the two connection lines 710 and 720 is prone to breakage. Compared with the foregoing manner in which the first connection line 700 is a single line, setting the first connection line 700 to be composed of the two connection lines 710 and 720 that are connected to each other makes the display mother board more prone to breakage, which is more conducive to the process of cutting and dicing the display panel.

[0059] Among them, as Figure 8 shown, since the two connection lines 710 and 720 are arranged at a certain angle with the traces of the main body portion 310a, therefore, the first connection line of the patterned portion on the cut display panel is also arranged at a certain angle with the traces of the main body portion. Preferably, the angle between the two first connection lines and the traces of the main body portion is 0-40°.

[0060] In another embodiment, the patterned portion includes two second connection lines that are connected to the main body portion and are spaced apart, and a third connection line that is connected between the two second connection lines. The third connection line includes a plurality of first connection portions and a plurality of second connection portions that intersect. Each second connection portion includes an opposite first end and a second end. At least one first connection portion is connected between the first end of the corresponding second connection portion and the second end of the connection portion adjacent to the corresponding connection portion, and at least one first connection portion is connected to one of the second connection lines at the connection with the first end of the corresponding second connection portion, and at least one first connection portion is connected to the other second connection line at the connection with the second end of the corresponding second connection portion.

[0061] Please refer to Figure 9, still taking the patterned portion 310b of the display mother board before cutting as an example, the structure of the patterned portion of the display panel will be described. Among them, the patterned portion 310b includes two second connection lines 800 that are connected to the main body portion 310a and are spaced apart, and a third connection line 900 that is connected between the two second connection lines 800. The third connection line 900 includes a plurality of first connection portions 910 and a plurality of second connection portions 920 that intersect. Each second connection portion 920 includes an opposite first end and a second end. At least one first connection portion 910 is connected between the first end of the corresponding second connection portion 920 and the second end of the connection portion adjacent to the corresponding connection portion, and at least one first connection portion 910 is connected to one of the second connection lines 800 at the connection with the first end of the corresponding second connection portion 920, and at least one first connection portion 910 is connected to the other second connection line 800 at the connection with the second end of the corresponding second connection portion 920.

[0062] Among them, the lengths of the adjacent first connection portions 910 and the second connection portions 920 are equal, and the included angle between the adjacent first connection portions 910 and the second connection portions 920 is 45°.

[0063] In this embodiment, since there are a large number of hollow structures in the patterned portion 310b, in the cutting and separating process, the traces of the patterned portion 310b are more likely to break under the action of the same force compared to the traces of the main body portion 310a, and the second conductive layer 300 on the cutting surface of the prepared display panel is an uneven cutting surface with convex regions and concave regions, thereby effectively reducing the probability of peeling between the metal layer and the passivation layer and improving the display performance of the display panel after cutting.

[0064] In this article, specific examples are used to elaborate on the principles and implementation manners of the present invention. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A display panel, comprising a display area and a non-display area located on at least one side of the display area, characterized in that, Comprising: Substrate; First conductive layer, located on the substrate; Interlayer insulating layer, located on the first conductive layer; And Second conductive layer, located on the interlayer insulating layer, including a wiring terminal located in the non-display area, and the wiring terminal further includes a main body portion located in the non-display area; Wherein, the wiring terminal further includes a patterned portion connected to one end of the main body portion away from the display area; Wherein, the patterned portion includes two second connection lines connected to the main body portion and spaced apart from each other, and a third connection line connected between the two second connection lines, the third connection line includes a plurality of first connection portions and a plurality of second connection portions that intersect, each of the second connection portions includes an opposite first end and a second end, at least one of the first connection portions is connected between the first end of the corresponding second connection portion and the second end of the connection portion adjacent to the corresponding connection portion, and at least one of the first connection portions is connected to one of the second connection lines at the connection with the first end of the corresponding second connection portion, and at least one of the first connection portions is connected to the other second connection line at the connection with the second end of the corresponding second connection portion; wherein, the lengths of adjacent first connection portions and second connection portions are equal, and the included angle between adjacent first connection portions and second connection portions is 45°.

2. The display panel according to claim 1, characterized in that, A first through hole is provided on the wiring of the patterned portion.

3. The display panel according to claim 2, characterized in that, Further includes a first passivation layer and a second passivation layer located on the second conductive layer, and the first through hole communicates with a second through hole penetrating through the first passivation layer and the second passivation layer.

4. The display panel according to claim 2, characterized in that, The ratio of the diameter of the first through hole to the width of the wiring of the patterned portion is greater than 2:3 and less than 1.

5. The display panel according to claim 1, characterized in that, The patterned portion includes two first connection lines connected to the main body portion and spaced apart from each other.

6. The display panel according to claim 5, characterized in that, The two first connection lines are arranged parallel to the wiring of the main body portion.

7. The display panel according to claim 5, characterized in that, The included angle between the two first connection lines and the wiring of the main body portion is 0 - 40°.

8. The display panel according to claim 1, characterized in that, The lengths of adjacent first connection portions and second connection portions are equal, and the included angle between adjacent first connection portions and second connection portions is 45°.

9. A display mother board, comprising a plurality of display panels according to any one of claims 1-8, a cutting area located outside the display panel, and a connection area between the cutting area and the display panel, characterized in that, Comprising: Substrate; First conductive layer, located on the substrate; Interlayer insulating layer, located on the first conductive layer; And Second conductive layer, located on the interlayer insulating layer, including a wiring terminal, and the wiring terminal includes a main body portion located in the connection area; Wherein, the wiring terminal further includes a patterned portion located in the cutting area and connected to the main body portion; Wherein, the patterning portion includes two second connection lines that are connected to the main body portion and are spaced apart, and a third connection line that is connected between the two second connection lines. The third connection line includes a plurality of first connection portions and a plurality of second connection portions that intersect. Each of the second connection portions includes an opposite first end and a second end. At least one of the first connection portions is connected between the first end of the corresponding second connection portion and the second end of the connection portion adjacent to the corresponding connection portion, and at least one of the first connection portions is connected to one of the second connection lines at the connection with the first end of the corresponding second connection portion, and at least one of the first connection portions is connected to the other second connection line at the connection with the second end of the corresponding second connection portion; wherein, the lengths of the adjacent first connection portions and the second connection portions are equal, and the included angle between the adjacent first connection portions and the second connection portions is 45°.

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