Display panel, crack detection method thereof and electronic equipment

Abstract

The invention provides a display panel, a crack detection method thereof and electronic equipment, and relates to the technical field of display. The crack detection line provided by the invention comprises the crack detection lines which are at least partially overlapped in the first direction, so that when the crack detection line is used for crack detection, whether a crack exists in a film layer between the two crack detection lines or not can be judged according to the capacitance change between the two crack detection lines with the overlapped area, and the crack detection accuracy is improved. Therefore, the crack detection process of the display panel is completed. According to the technical scheme provided by the invention, crack detection of the middle film layer between different crack detection lines can be realized, and the detection effect of crack detection of the display panel is improved. Moreover, the crack detection circuit provided by the invention is simple in structure, and occupies a small effective wiring area in the display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and more specifically, to a display panel and a crack detection method and electronic device thereof. Background Art

[0002] With the rapid development of display technology, display panels are being used more and more widely in various fields. At present, the process of display panel manufacturing may cause cracks at the edge of the display panel, and the cracks at the edge will cause the wiring near the frame of the display panel to break. Moreover, if the cracks extend from the edge of the display panel to the inside of the display area, it will affect the wiring or circuit in the display area, and there is a high risk of defects such as black spots or abnormal display.

[0003] That is to say, cracks on the edge of the display panel seriously affect the performance of the display panel, and panel crack detection (PCD) of the display panel before the display panel leaves the factory becomes a very important link. However, the panel crack detection effect of the existing display panel is not ideal, and the panel crack detection structure and process need to be improved. Summary of the invention

[0004] In view of this, the present application provides a display panel and a crack detection method and electronic device thereof, which effectively solve the technical problems existing in the prior art and improve the detection effect of crack detection of the display panel.

[0005] To achieve the above objectives, the technical solutions provided by this application are as follows:

[0006] A display panel, comprising:

[0007] substrate;

[0008] And, a crack detection circuit located on one side of the substrate, the crack detection circuit includes at least two crack detection lines arranged in sequence in a first direction, and two adjacent crack detection lines are insulated and isolated; in the first direction, any one of the crack detection lines has at least a partial overlapping area with at least one other crack detection line, and the first direction is a direction perpendicular to the plane where the display panel is located.

[0009] Based on the same inventive concept, the present application also provides an electronic device, which includes the above-mentioned display panel.

[0010] Based on the same inventive concept, the present application also provides a method for detecting cracks in a display panel, which is used to detect the above-mentioned display panel. The method for detecting cracks includes:

[0011] Applying a capacitance detection signal to two crack detection lines having at least a partially overlapping area to obtain a detection capacitance between the two crack detection lines;

[0012] According to the difference between the detected capacitance and the set capacitance, it is determined whether there is a crack in the film layer at the overlapping area between the two crack detection lines.

[0013] Compared with the prior art, the technical solution provided by this application has at least the following advantages:

[0014] The present application provides a display panel, a crack detection method thereof, and an electronic device, wherein the display panel includes a substrate; and a crack detection circuit located on one side of the substrate, wherein the crack detection circuit includes at least two crack detection lines arranged in sequence in a first direction, and two adjacent crack detection lines are insulated and isolated; in the first direction, any one of the crack detection lines has at least a partial overlapping area with at least one other crack detection line, and the first direction is a direction perpendicular to the plane where the display panel is located.

[0015] As can be seen from the above content, the crack detection circuit provided by the present application includes crack detection lines that are at least partially overlapped in the first direction. Therefore, when the crack detection circuit is used for crack detection, it can be determined whether the film layer between the two crack detection lines has cracks based on the capacitance change between the two crack detection lines with the overlapping area, thereby completing the crack detection process of the display panel. The technical solution provided by the present application can realize crack detection of the intermediate film layer between different crack detection lines, thereby improving the detection effect of crack detection of the display panel. In addition, the crack detection circuit provided by the present application has a simple structure and occupies a small effective wiring area in the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0018] Figure 2 for Figure 1 Section along BB' direction;

[0019] Figure 3 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0020] Figure 4 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0021] Figure 5 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0022] Figure 6 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0023] Figure 7 for Figure 6 Section along CC' direction;

[0024] Figure 8 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0025] Fig. 9 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0026] Fig.10 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0027] Fig.11 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0028] Fig.12 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0029] Fig.13 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0030] Fig.14 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0031] Fig.15 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0032] Fig.16 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0033] Fig.17 for Fig.16 Section view along the DD' direction;

[0034] Fig.18 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0035] Fig.19 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0036] Fig. 20 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0037] Fig.21 A flow chart of a crack detection method provided in an embodiment of the present application;

[0038] Fig. 22 A flow chart of another crack detection method provided in an embodiment of the present application;

[0039] Fig.23 A schematic diagram of the structure of a pixel circuit provided in an embodiment of the present application;

[0040] Fig.24 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0041] Reference numerals:

[0042] 10-substrate; 101-semiconductor layer; 102-gate insulating layer; 103-gate metal layer; 104-capacitor insulating layer; 105-capacitor metal layer; 106-interlayer insulating layer; 107-source-drain metal layer; 108-planarization layer; 20-crack detection line; 21-first crack detection line; 22-second crack detection line; 23-edge crack detection line; 24-opening crack detection line; 201-first detection line; 20 2-second detection line; 203-main detection block; 204-auxiliary detection block; 30-insulating isolation film layer; 31-crack; 41-anode layer; 42-luminescent layer; 43-cathode layer; 50-pixel definition layer; 60-encapsulation structure layer; 61-first inorganic film; 62-organic film; 63-second inorganic film; 71-first touch metal layer; 72-touch insulation layer; 73-second touch metal layer; 74-connection lead wire; 8 0-water vapor barrier; Z-first direction; S1-overlapping area; AA-display area; HL-opening area; NA-non-display area, NA1-scanning line area; NA2-chip binding area; NA3-top area; NA4-bending area; T101-first transistor; T102-second transistor; T103-third transistor; T104-fourth transistor; T105-fifth transistor; T106-sixth transistor; T107-seventh transistor; C101-storage capacitor; SCAN101-first scan signal terminal; SCAN102-second scan signal terminal; EMIT-light emitting control signal terminal; DATA-data signal terminal; PVDD-power supply voltage terminal; PVEE-cathode voltage terminal; VREF-reference voltage terminal; N101-first node; N102-second node; D101-light emitting diode. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] As described in the background technology, with the rapid development of display technology, display panels are being used more and more widely in various fields. At present, cracks may be generated at the edge of the display panel during the manufacturing process of the display panel, and the cracks at the edge may cause the wiring near the frame of the display panel to break, and if the cracks extend from the edge of the display panel to the inside of the display area, it will affect the wiring or circuit in the display area, and there is a high risk of black spots or abnormal display. In other words, cracks at the edge of the display panel seriously affect the performance of the display panel, and it becomes a very important step to perform panel crack detection on the display panel before the display panel leaves the factory. However, the panel crack detection effect of the existing display panel is not ideal, and the panel crack detection structure and process need to be improved.

[0045] Based on this, the embodiments of the present application provide a display panel and a crack detection method and electronic device thereof, which effectively solve the technical problems existing in the prior art and improve the detection effect of crack detection of the display panel.

[0046] To achieve the above purpose, the technical solution provided in the embodiment of the present application is as follows, specifically combined with Figures 1 to 22 The technical solution provided in the embodiments of the present application is described in detail.

[0047] Combination Figure 1 and Figure 2 As shown, Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application is shown in FIG. Figure 2 for Figure 1 A cross-sectional view along the BB' direction in the middle. The display panel provided in the embodiment of the present application includes: a substrate 10; and a crack detection circuit located on one side of the substrate 10, wherein the crack detection circuit includes at least two crack detection lines 20 arranged in sequence in a first direction Z, and two adjacent crack detection lines 20 are insulated and isolated; in the first direction Z, any one of the crack detection lines 20 has at least a partial overlapping area with at least one other crack detection line 20, and the first direction Z is a direction perpendicular to the plane where the display panel is located. Optionally, of the at least two crack detection lines 20, the extension directions of the two crack detection lines 20 are the same, and in the extension direction, the two crack detection lines 20 have an overlapping area in the first direction Z at any position.

[0048] Continue as Figure 1 and Figure 2 As shown, the present application takes the display panel including two crack detection lines 20 as an example, the two crack detection lines 20 are respectively the first crack detection line 21 and the second crack detection line 22, and the first crack detection line 21 and the second crack detection line 22 have at least a partial overlapping area S1 in the first direction Z. In the first direction Z, there is an insulating isolation film layer 30 between the first crack detection line 21 and the second crack detection line 22, and the insulating isolation film layer 30 insulates and isolates the first crack detection line 21 and the second crack detection line 22, wherein the insulating isolation film layer 30 is a film layer to be detected for cracks 31, and the insulating isolation film layer 30 can be a single insulating structure layer, or can be composed of a plurality of insulating structure layers stacked together, or can be composed of an insulating structure layer and a metal structure layer stacked together, and the present application does not make specific restrictions on this. Capacitance is related to the area of ​​the capacitor plates, the spacing between the plates, and the dielectric constant of the material layer between the plates. When the crack detection circuit is used for crack detection, when the insulating isolation film layer 30 has a crack 31 at the overlapping area of ​​the first crack detection line 21 and the second crack detection line 22, the presence of the crack 31 in the insulating isolation film layer 30 is equivalent to changing its dielectric constant, so the capacitance between the first crack detection line 21 and the second crack detection line 22 changes; and when the insulating isolation film layer 30 has no crack 31 at the overlapping area of ​​the first crack detection line 21 and the second crack detection line 22, the capacitance between the first crack detection line 21 and the second crack detection line 22 is the standard set capacitance and does not change, thereby, crack detection of the insulating isolation film layer 30 can be achieved according to the capacitance change between the first crack detection line 21 and the second crack detection line 22.

[0049] As can be seen from the above content, the crack detection circuit provided in the embodiment of the present application includes crack detection lines 20 that are at least partially overlapped in the first direction. Therefore, when the crack detection circuit is used for crack detection, it can be determined whether the film layer between the two crack detection lines 20 has cracks based on the capacitance change between the two crack detection lines 20 with the overlapping area, thereby completing the crack detection process of the display panel. The technical solution provided in the embodiment of the present application can realize crack detection of the intermediate film layer between different crack detection lines 20, thereby improving the detection effect of crack detection of the display panel. In addition, the crack detection circuit provided in the embodiment of the present application has a simple structure and occupies a small effective wiring area in the display panel.

[0050] In some embodiments, the crack detection circuit provided in the embodiments of the present application may include a circuit located at the edge of the display panel. It is understandable that cracks are prone to occur at the edge of the display panel, and the appearance of cracks is caused by cutting stress during the cutting process of the display panel on the one hand; on the other hand, for flexible display panels, when they are bent, if the radius of curvature is too small and exceeds the tolerable range of the flexible sheet, cracks are also prone to occur at the edge. Therefore, the technical solution provided in the embodiments of the present application sets the crack detection circuit at the edge of the display panel, which can detect cracks at the edge of the display panel. Reference Figure 3 , which is a schematic diagram of the structure of another display panel provided in an embodiment of the present application, wherein the display panel provided in an embodiment of the present application includes a display area AA and a non-display area NA located outside the display area AA; the non-display area NA may be located on one side of the display area AA, or the non-display area NA may be located on at least two sides of the display area AA, or may be as follows Figure 3 The non-display area NA shown can be arranged around the display area AA, and this application does not make specific restrictions on this. Among them, the crack detection line 20 provided in the embodiment of the present application includes an edge crack detection line 23 located in the non-display area NA, any two edge crack detection lines 23 are insulated and isolated in the first direction Z, and the edge crack detection line 23 is extended along the edge line of the display area AA, wherein any one of the edge crack detection lines 23 and at least one of the remaining edge crack detection lines 23 have at least a partial overlapping area in the first direction Z. When the edge crack detection line 23 is used for crack detection, it can be determined whether the film layer between the two edge crack detection lines 23 has a crack based on the capacitance change between the two edge crack detection lines 23 with the overlapping area, thereby realizing the crack detection of the intermediate film layer between different edge crack detection lines 23, and improving the detection effect of crack detection of the display panel.

[0051] refer to Figure 4 As shown, it is a structural schematic diagram of another display panel provided by an embodiment of the present application, wherein, at the non-display area NA of the display panel provided by the embodiment of the present application, in the direction X, the non-display area NA includes a scanning line area NA1 located on at least one side of the display area AA; in the direction Y, the non-display area NA includes a chip binding area NA2 and a top area NA3 on the opposite side. The edge crack detection line 23 is arranged along a direction surrounding the display area AA, and the edge crack detection line 23 at least includes a portion located at the scanning line area NA1, and the edge crack detection line 23 also extends toward one side of the chip binding area NA2; in addition, the edge crack detection line 23 also extends to the top area NA3 on the opposite side of NA2, thereby increasing the detection range of the crack detection circuit and further improving the crack detection effect of the display panel. For further reference Figure 5 As shown, it is a structural schematic diagram of another display panel provided by an embodiment of the present application. The non-display area NA provided by the embodiment of the present application also includes a bending area NA4 located between the chip binding area NA2 and the display area AA. The bending area NA4 is used to bend the binding area NA2 to the back side of the substrate 10 (the back side of the substrate 10, i.e., the side of the substrate 10 facing away from the crack detection circuit). Thus, the wiring area of ​​the non-display area NA is increased by setting the bending area NA4, while the design of the narrow frame of the display panel is not affected. Since the bending area NA4 is prone to crack problems, the edge crack detection line 23 provided by the embodiment of the present application also extends at least to the bending area NA4, thereby realizing crack detection in the bending area NA4. Optionally, the edge crack detection line 23 provided by the embodiment of the present application can extend to the chip binding area NA2, so as to facilitate electrical connection with the chip in the chip binding area NA2, thereby providing a detection signal for the edge crack detection line 23 through the chip.

[0052] In some embodiments, the crack detection circuit provided in the embodiment of the present application may further include a circuit located at the opening area HL of the display panel. In order to increase the screen-to-body ratio of the display panel, an opening may be provided in the display area AA to place optical components such as a camera at the opening area HL. In the process of the display panel, cracks are easily generated when the opening area HL is cut. When the cracks extend to the display area AA, dark spots may appear on the display panel, thereby affecting the service life of the display panel. Therefore, in the technical solution provided in the embodiment of the present application, the crack detection circuit also includes a circuit provided at the opening area HL, which can detect cracks at the opening area HL of the display panel. Combined with Figure 6 and Figure 7 As shown, Figure 6 A schematic diagram of the structure of another display panel provided in an embodiment of the present application, Figure 7 for Figure 6 The cross-sectional view along the CC' direction in the figure, wherein the display panel provided in the embodiment of the present application includes an opening area HL located in the display area AA; the crack detection line 20 includes an opening crack detection line 24 located in the display area AA, any two opening crack detection lines 24 are insulated and isolated in the first direction Z, and the opening crack detection lines 24 are arranged along the direction surrounding the opening area HL, wherein any one of the opening crack detection lines 24 has at least a partial overlapping area with at least one other opening crack detection line 24 in the first direction Z.

[0053] It should be noted that in the display panel provided in the embodiment of the present application, when the display panel includes a display area AA and a non-display area NA, the crack detection circuit can set an edge crack detection line 23 at the non-display area NA. Also, when the display panel includes a display area AA, a non-display area NA and an opening area HL located in the display area AA, the crack detection circuit can set an edge crack detection line 23 only in the non-display area NA; or, the crack detection circuit can set an opening crack detection line 24 only in the opening area HL; or, the crack detection circuit can set an edge crack detection line 23 in the non-display area NA and an opening crack detection line 24 in the opening area HL, and the present application does not make specific restrictions on this. In addition, in some other embodiments, the crack detection circuit can also set a crack detection line 20 in other areas of the display panel, which needs to be specifically designed according to the actual application.

[0054] In some embodiments, all crack detection lines 20 provided in the embodiments of the present application may include continuous detection lines, thereby simplifying the preparation process of the crack detection circuit; or, all crack detection lines 20 may include discontinuous detection lines, so as to accurately detect the crack position by disconnecting the crack detection lines 20 according to the capacitance detection results of different disconnections, and the present application does not make any specific restrictions on this. Figure 6 As shown, at least one of the crack detection lines 20 provided in the embodiment of the present application can be a continuous detection line, which simplifies the preparation process of the crack detection line 20; when at least one of the crack detection lines 20 is an edge crack detection line 23, the edge crack detection line 23 can start from the chip bonding area NA2, extend continuously in the direction surrounding the display area AA, and then extend again to the chip bonding area NA2 to end, and the edge crack detection line 23 is a continuous detection line without a break in the extended line. Alternatively, when at least one of the crack detection lines 20 is an opening crack detection line 24, the opening crack detection line 24 can extend continuously in the direction surrounding the opening area HL, and then extend around the opening area HL, and the opening crack detection line 24 is a continuous detection line without a break in the extended line.

[0055] refer to Figure 8As shown, it is a structural schematic diagram of another display panel provided in an embodiment of the present application, wherein at least one of the crack detection lines 20 provided in the embodiment of the present application includes a first detection line 201 and a second detection line 202 divided in the extension direction thereof; the first detection line 201 and the remaining at least one crack detection line 20 have at least a partial overlapping area in the first direction Z, and the second detection line 202 and the remaining at least one crack detection line 20 have at least a partial overlapping area in the first direction Z. It can be understood that the crack detection line 20 is divided into a first detection line 201 and a second detection line 202; when the crack detection circuit is used for crack detection, the first detection line 201 and the crack detection line 20 with which it overlaps in the first direction Z can be used to detect whether there is a crack problem in the film layer between the two; and the second detection line 202 and the crack detection line 20 with which it overlaps in the first direction Z can also be used to detect whether there is a crack problem in the film layer between the two, which not only enables crack detection of the display panel, but also enables positioning of whether the crack specifically appears within the range of the first detection line 201 or within the range of the second detection line 202, thereby improving the crack detection effect.

[0056] In some embodiments, when the crack detection line 20 provided in the embodiment of the present application is divided into the first detection line 201 and the second detection line 202, the crack detection line 20 that overlaps with the crack detection line 20 in the first direction Z may be a continuous detection line. Figure 8 As shown, taking two edge crack detection lines 23 as an example, one edge crack detection line 23 divides the first detection line 201 and the second detection line 202 that half surround the display area AA, while the other edge crack detection line 23 is a continuous detection line. When the crack detection circuit is used for crack detection, it is possible to detect whether the film layer between the two has a crack problem through the first detection line 201 of the edge crack detection line 23 and the other edge crack detection line 23; and it is also possible to detect whether the film layer between the two has a crack problem through the second detection line 202 of the edge crack detection line 23 and the other edge crack detection line 23, which can not only realize the edge crack detection of the display panel, but also locate whether the crack at the edge specifically appears within the range of the first detection line 201 or the range of the second detection line 202, thereby improving the crack detection effect.

[0057] Alternatively, when the crack detection line 20 provided in the embodiment of the present application is divided into the first detection line 201 and the second detection line 202, the crack detection line 20 that overlaps with the crack detection line 20 in the first direction Z may be a discontinuous detection line. Figure 8As shown, taking two opening crack detection lines 24 as an example, one of the opening crack detection lines 24 is divided into two first detection lines 201 and second detection lines 202 that semi-surround the display area AA, and the other opening crack detection line 24 is also divided into two first detection lines 201 and second detection lines 202 that semi-surround the display area AA, wherein the two first detection lines 201 have an overlapping area in the first direction Z, and the two second detection lines 202 have an overlapping area in the first direction Z. When the crack detection circuit is used for crack detection, it is possible to detect whether the film layer between the two first detection lines 201 has a crack problem through the capacitance change between the two first detection lines 201; and it is also possible to detect whether the film layer between the two second detection lines 202 has a crack problem through the capacitance change between the two second detection lines 202, which can not only realize crack detection at the opening area HL of the display panel, but also locate whether the crack at the opening area HL specifically appears within the range of the two first detection lines 201 or the range of the two second detection lines 202, thereby improving the crack detection effect.

[0058] It should be noted that the attached Figure 8 The description is made by taking the case that one of the two edge crack detection lines 23 is divided into the first detection line 201 and the second detection line 202, and the other edge crack detection line 23 is a continuous detection line; and the description is made by taking the case that both of the two opening crack detection lines 24 are divided into the first detection line 201 and the second detection line 202. In some other embodiments, the two edge crack detection lines 23 provided in the embodiment of the present application may be divided into the first detection line 201 and the second detection line 202; and the two opening crack detection lines 24 provided in the embodiment of the present application may be divided into the first detection line 201 and the second detection line 202, and the other opening crack detection line 24 is a continuous detection line, and the present application does not make any specific limitation on this.

[0059] In some embodiments, in order to further accurately locate the crack position, the at least one crack detection line 20 provided in the embodiment of the present application can also be divided into more detection blocks. Fig. 9As shown, it is a structural schematic diagram of another display panel provided by an embodiment of the present application, wherein, in the two crack detection lines 20 having at least a partial overlapping area, one of the crack detection lines 20 includes a plurality of main detection blocks 203 divided in its extension direction, and the main detection block 203 has at least a partial overlapping area with the other crack detection line 20 in the first direction Z. It can be understood that the crack detection line 20 is divided into a greater number of main detection blocks 203 in its extension direction; when the crack detection circuit is used for crack detection, each main detection block 203 and the crack detection line 20 having an overlap in the first direction Z can be used to detect whether there is a crack problem in the film layer between the two, which can not only realize the crack detection of the display panel, but also can further locate the range of which main detection block 203 the crack specifically appears, further improving the crack detection effect.

[0060] Continue as Fig. 9 As shown, in two crack detection lines 20 having at least a partially overlapping area, when one crack detection line 20 includes a plurality of main detection blocks 203 divided in its extension direction, the other crack detection line 20 may be a continuous detection line. Taking two edge crack detection lines 23 as an example, one edge crack detection line 23 includes a plurality of main detection blocks 203 divided in its extension direction, and the other edge crack detection line 23 is a continuous detection line; when the crack detection line is used for crack detection, each main detection block 203 and the other edge crack detection line 23 can be used to detect whether there is a crack problem in the film layer between the two, which can not only realize crack detection at the edge of the display panel, but also can further locate the range of which main detection block 203 the edge crack specifically appears, further improving the crack detection effect. Also, taking two opening crack detection lines 24 as an example, one opening crack detection line 24 includes multiple main detection blocks 203 divided in its extension direction, and the other opening crack detection line 24 is a continuous detection line; when using this crack detection circuit for crack detection, it is possible to detect whether there is a crack problem in the film layer between the two through each main detection block 203 and another opening crack detection line 24, which can not only realize crack detection at the opening area HL of the display panel, but also can further locate the main detection block 203 in which the crack at the opening area HL specifically appears, thereby further improving the crack detection effect.

[0061] Alternatively, when one of the two crack detection lines 20 having at least a partially overlapping area includes a plurality of main detection blocks 203 divided in its extension direction, the other crack detection line 20 may also be divided. Fig.10As shown, it is a structural schematic diagram of another display panel provided in an embodiment of the present application, wherein, among two crack detection lines 20 having at least partial overlapping areas, when one crack detection line 20 includes a plurality of main detection blocks 203 divided in its extension direction, the other crack detection line 20 includes a first detection line 201 and a second detection line 202 divided in its extension direction, the first detection line 201 and at least part of the main detection blocks 203 have at least partial overlapping areas in the first direction Z, and the second detection line 202 and the remaining part of the main detection blocks 203 have at least partial overlapping areas in the first direction Z. It can be understood that the crack detection line 20 is divided into a larger number of main detection blocks 203 in its extension direction, and another crack detection line 20 is divided into a first detection line 201 and a second detection line 202; when the crack detection circuit is used for crack detection, it is possible to detect whether there is a crack problem in the film layer between the two by changing the capacitance between part of the main detection blocks 203 and the first detection line 201, and it is also possible to detect whether there is a crack problem in the film layer between the two by changing the capacitance between the remaining main detection blocks 203 and the second detection line 202. This not only enables crack detection of the display panel, but also enables further locating the range of which main detection block 203 the crack specifically appears, thereby further improving the crack detection effect. In addition, dividing another crack detection line 20 into a first detection line 201 and a second detection line 202 can also improve the scope of application of the crack detection circuit so as to be applicable to the structures of different display panels; for example, when there is a via or the like in the extension direction of another crack detection line 20, the crack detection line 20 can be divided into a first detection line 201 and a second detection line 202 at the via, thereby improving the scope of application of the crack detection circuit.

[0062] Continue to refer Fig.10As shown, taking two edge crack detection lines 23 as an example, one edge crack detection line 23 includes a plurality of main detection blocks 203 divided in its extension direction, and the other edge crack detection line 23 includes a first detection line 201 and a second detection line 202 divided in its extension direction; when the crack detection circuit is used for crack detection, it is possible to detect whether there is a crack problem in the film layer between the two by changing the capacitance between part of the main detection blocks 203 and the first detection line 201, and it is also possible to detect whether there is a crack problem in the film layer between the two by changing the capacitance between the remaining part of the main detection blocks 203 and the second detection line 202. This not only enables crack detection at the edge of the display panel, but also enables further locating in which main detection block 203 the crack at the edge specifically appears, thereby further improving the crack detection effect. Also, taking two opening crack detection lines 24 as an example, one opening crack detection line 24 includes a plurality of main detection blocks 203 divided in its extension direction, and the other opening crack detection line 24 includes a first detection line 201 and a second detection line 202 divided in its extension direction; when the crack detection circuit is used for crack detection, it is possible to detect whether there is a crack problem in the film layer between the two by changing the capacitance between part of the main detection blocks 203 and the first detection line 201, and it is also possible to detect whether there is a crack problem in the film layer between the two by changing the capacitance between the remaining part of the main detection blocks 203 and the second detection line 202. This not only enables crack detection at the opening area HL of the display panel, but also enables further locating in which main detection block 203 the crack at the opening area HL specifically appears, thereby further improving the crack detection effect.

[0063] Alternatively, when one of the two crack detection lines 20 having at least a partially overlapping area includes a plurality of main detection blocks 203 divided in its extension direction, the other crack detection line 20 can also be divided into a plurality of detection blocks. Fig.11As shown, it is a structural schematic diagram of another display panel provided in an embodiment of the present application, wherein, among two crack detection lines 20 having at least a partial overlapping area, when one crack detection line 20 includes a plurality of main detection blocks 203 divided in its extension direction, the other crack detection line 20 includes a plurality of auxiliary detection blocks 204 divided in its extension direction, and one of the auxiliary detection blocks 204 has at least a partial overlapping area with one of the main detection blocks 203 in the first direction Z. It can be understood that the crack detection line 20 is divided into a larger number of main detection blocks 203 in its extension direction, and another crack detection line 20 is also divided into at least the same number of auxiliary detection blocks 204; when the crack detection circuit is used for crack detection, the capacitance change between the main detection block 203 and the overlapping auxiliary detection block 204 can be used to detect whether there is a crack problem in the film layer between the two, which can not only realize the crack detection of the display panel, but also further locate the range of the main detection block 203 and the auxiliary detection block 204 where the crack specifically appears, further improving the crack detection effect. In addition, dividing another crack detection line 20 into multiple auxiliary detection blocks 204 can also improve the scope of application of the crack detection circuit to be applicable to the structure of different display panels.

[0064] Continue to refer Fig.11 As shown, taking two edge crack detection lines 23 as an example, one edge crack detection line 23 includes a plurality of main detection blocks 203 divided in its extension direction, and the other edge crack detection line 23 includes a plurality of auxiliary detection blocks 204 divided in its extension direction; when the crack detection circuit is used for crack detection, it is possible to detect whether there is a crack problem in the film layer between the main detection block 203 and the overlapping auxiliary detection block 204 through the change in capacitance between the main detection block 203 and the overlapping auxiliary detection block 204, which can not only realize crack detection at the edge of the display panel, but also can further locate the specific main detection block 203 and auxiliary detection block 204 in which the crack at the edge appears, thereby further improving the crack detection effect. Also, taking two opening crack detection lines 24 as an example, one opening crack detection line 24 includes a plurality of main detection blocks 203 divided in its extension direction, and the other opening crack detection line 24 includes a plurality of auxiliary detection blocks 204 divided in its extension direction; when the crack detection circuit is used for crack detection, the capacitance change between the main detection block 203 and the overlapping auxiliary detection block 204 can be used to detect whether there is a crack problem in the film layer between the two, which can not only realize crack detection at the opening area HL of the display panel, but also can further locate the main detection block 203 and the auxiliary detection block 204 in which the crack at the opening area HL specifically appears, thereby further improving the crack detection effect.

[0065] It should be noted that the display panel provided in the embodiment of the present application is not limited to Figures 9 and 10The structures of the edge crack detection line 23 and the opening crack detection line 24 are shown respectively. Figures 9 and 10 The structures of the edge crack detection line 23 and the opening crack detection line 24 shown in the figure can be combined arbitrarily, such as Fig. 9 The edge crack detection line 23 and Fig.10 The open crack detection line 24 shown is combined, Fig.10 The edge crack detection line 23 and Fig.11 The open hole crack detection line 24 shown is combined, etc., and this application does not make any specific restrictions on this, and needs to be specifically designed according to actual applications.

[0066] In some embodiments, the crack detection circuit provided in the embodiment of the present application can be prepared by an independent metal layer. Alternatively, the crack detection circuit provided in the embodiment of the present application can also reuse the original metal layer in the display panel. For example, the display panel provided in the embodiment of the present application includes a transistor array layer located on the substrate 10, and the transistor array layer includes a gate metal layer 103 and a source-drain metal layer 107; the gate metal layer 103 and the source-drain metal layer 107 each include a crack detection line 20. For specific reference Fig.12FIG. 1 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application, wherein the display panel provided in an embodiment of the present application may include circuits such as a pixel circuit and a scan drive circuit, and the pixel circuit and the scan drive circuit include structures such as transistors. The scan drive circuit is electrically connected to the pixel circuit, and the scan drive circuit is used to provide a corresponding scan control signal to the pixel circuit; and the pixel circuit is electrically connected to the anode block, and the pixel circuit is used to provide a corresponding drive signal to the light-emitting diode composed of the anode block, the light-emitting layer 42 and the cathode layer 43. Specifically, the display panel includes: a substrate 10; a transistor array layer located on the substrate 10, the transistor array layer including a semiconductor layer 101, the semiconductor layer 101 including an active area forming a transistor TFT; a gate insulating layer 102 located on a side of the semiconductor layer 101 away from the substrate 10; a gate metal layer 103 located on a side of the gate insulating layer 102 away from the substrate 10, the gate metal layer 103 including a gate electrode forming a transistor TFT; an interlayer insulating layer 106 located on a side of the gate metal layer 103 away from the substrate 10; a source-drain metal layer 107 located on a side of the interlayer insulating layer 106 away from the substrate 10, the source-drain metal layer 107 including a source and a drain forming the transistor TFT, and the source and the drain are in contact with the active area through respective vias; and a planarizing layer 108 located on a side of the source-drain metal layer 107 away from the substrate 10. In addition, the display panel includes an anode layer 41 located on the side of the planarization layer 108 away from the substrate 10, the anode layer 41 includes a plurality of anode blocks, and the anode blocks are electrically connected to the source or drain of the corresponding transistor TFT in the pixel circuit through vias; and a pixel definition layer 50 located on the side of the anode layer 41 away from the substrate 10, the pixel definition layer 50 includes a plurality of pixel openings, and the pixel openings expose the anode blocks; a light emitting layer 42 located in the pixel openings and on the side of the anode layer 41 away from the substrate 10; and a cathode layer 43 located on the side of the light emitting layer 42 away from the substrate 10. Among them, the gate metal layer 103 and the source-drain metal layer 107 provided in the embodiment of the present application respectively include one of the crack detection lines 20, and the crack detection line 20 is prepared by multiplexing the gate metal layer 103 and the source-drain metal layer 107, so that there is no need to prepare a new metal layer separately to make the crack detection line, which simplifies the preparation process of the display panel and reduces the preparation cost of the display panel.

[0067] Fig.12 The transistor TFT in the display panel shown is a top-gate transistor, that is, the gate of the transistor TFT is located above the active layer. In some other embodiments, the transistor TFT provided in the embodiment of the present application can also be a bottom-gate transistor, that is, the gate of the transistor TFT is located below the active area. Fig.13, which is a schematic diagram of the structure of another display panel provided by an embodiment of the present application, wherein the display panel includes a substrate 10; a transistor array layer located on the substrate 10. The transistor array layer includes a gate metal layer 103, the gate metal layer 103 includes a gate electrode forming a transistor TFT; a gate insulating layer 102 located on the side of the gate metal layer 103 away from the substrate 10; a semiconductor layer 101 located on the side of the gate insulating layer 102 away from the substrate 10, the semiconductor layer 101 includes an active region forming a transistor TFT; an interlayer insulating layer 106 located on the side of the semiconductor layer 101 away from the substrate 10; a source-drain metal layer 107 located on the side of the interlayer insulating layer 106 away from the substrate 10, the source-drain metal layer 107 includes a source electrode and a drain electrode forming a transistor TFT, and the source electrode and the drain electrode are in contact with the active region through respective vias; and a planarization layer 108 located on the side of the source-drain metal layer 107 away from the substrate 10. In addition, the display panel includes an anode layer 41 located on the side of the planarization layer 108 away from the substrate 10, the anode layer 41 includes a plurality of anode blocks, and the anode blocks are electrically connected to the source or drain of the corresponding transistor TFT in the pixel circuit through vias; and a pixel definition layer 50 located on the side of the anode layer 41 away from the substrate 10, the pixel definition layer 50 includes a plurality of pixel openings, and the pixel openings expose the anode blocks; a light emitting layer 42 located in the pixel openings and on the side of the anode layer 41 away from the substrate 10; and a cathode layer 43 located on the side of the light emitting layer 42 away from the substrate 10. Among them, the gate metal layer 103 and the source-drain metal layer 107 provided in the embodiment of the present application respectively include one of the crack detection lines 20, and the crack detection line 20 is prepared by multiplexing the gate metal layer 103 and the source-drain metal layer 107, so that there is no need to prepare a new metal layer separately to make the crack detection line, which simplifies the preparation process of the display panel and reduces the preparation cost of the display panel.

[0068] In some embodiments, the display panel provided in the embodiment of the present application further includes a capacitor metal layer 105 for forming a capacitor, and the capacitor metal layer 105 may also be formed with a crack detection line 20. That is, the display panel provided in the embodiment of the present application includes a transistor array layer located on the substrate 10, and the transistor array layer includes a gate metal layer 103, a capacitor metal layer 105 and a source-drain metal layer 107; at least two layers of the gate metal layer 103, the capacitor metal layer 105 and the source-drain metal layer 107 respectively include one of the crack detection lines. For specific reference Fig.14 FIG. 1 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application. Fig.14Take the transistor TFT as a top-gate transistor as an example. The display panel includes a substrate 10; a transistor array layer located on the substrate 10. The transistor array layer includes a semiconductor layer 101, the semiconductor layer 101 includes an active region forming the transistor TFT; a gate insulating layer 102 located on the side of the semiconductor layer 101 away from the substrate 10; a gate metal layer 103 located on the side of the gate insulating layer 102 away from the substrate 10, the gate metal layer 103 includes a gate electrode forming the transistor TFT; a capacitor insulating layer 104 located on the side of the gate metal layer 103 away from the substrate 10; a capacitor metal layer 105 located on the side of the capacitor insulating layer 104 away from the substrate 10, the capacitor metal layer 105 includes a circuit A plate of the middle capacitor, the other plate of the capacitor can be located in the gate metal layer 103, or the other plate of the capacitor can be located in the source-drain metal layer 107; an interlayer insulating layer 106 located on the side of the capacitor metal layer 105 away from the substrate 10; a source-drain metal layer 107 located on the side of the interlayer insulating layer 106 away from the substrate 10, the source-drain metal layer 107 includes a source and a drain forming the transistor TFT, and the source and the drain are in contact with the active area through respective vias; a planarization layer 108 located on the side of the source-drain metal layer 107 away from the substrate 10. In addition, the display panel includes an anode layer 41 located on the side of the planarization layer 108 away from the substrate 10, the anode layer 41 includes a plurality of anode blocks, and the anode blocks are electrically connected to the source or drain of the corresponding transistor TFT in the pixel circuit through vias; and a pixel definition layer 50 located on the side of the anode layer 41 away from the substrate 10, the pixel definition layer 50 includes a plurality of pixel openings, and the pixel openings expose the anode blocks; a light-emitting layer 42 located in the pixel openings and on the side of the anode layer 41 away from the substrate 10; and a cathode layer 43 located on the side of the light-emitting layer 42 away from the substrate 10. Among them, at least two of the gate metal layer 103, the capacitor metal layer 105 and the source-drain metal layer 107 provided in the embodiment of the present application respectively include one of the crack detection lines 20, and the crack detection line 20 is prepared by reusing the gate metal layer 103, the capacitor metal layer 105 and the source-drain metal layer 107, so that there is no need to prepare a new metal layer separately to make the crack detection line, which simplifies the preparation process of the display panel and reduces the preparation cost of the display panel.

[0069] It should be noted that when the transistor array layer provided in the embodiment of the present application includes a gate metal layer 103, a capacitor metal layer 105 and a source-drain metal layer 107, the gate metal layer 103 and the capacitor metal layer 105 each include a crack detection line 20; or, the gate metal layer 103 and the source-drain metal layer 107 each include a crack detection line 20; or, the capacitor metal layer 105 and the source-drain metal layer 107 each include a crack detection line 20; or, the gate metal layer 103, the capacitor metal layer 105 and the source-drain metal layer 107 each include a crack detection line 20, and specific design is required according to actual applications.

[0070] In some embodiments, the display panel provided in the embodiment of the present application also includes a capacitor metal layer 105 that forms a capacitor and a touch metal layer that forms a touch electrode, and the capacitor metal layer 105 and / or the touch metal layer may also be formed with a crack detection line 20. That is, the display panel provided in the embodiment of the present application includes a transistor array layer located on the substrate, the transistor array layer includes a gate metal layer 103, a capacitor metal layer 105 and a source-drain metal layer 107; and at least one touch metal layer located on the side of the transistor array layer away from the substrate 10; at least two of the gate metal layer 103, the capacitor metal layer 105, the source-drain metal layer 107 and the touch metal layer each include one of the crack detection lines 20. For specific reference, Fig.15 As shown, Fig.15Also, the transistor TFT is a top-gate transistor as an example. The display panel includes a substrate 10; a transistor array layer located on the substrate 10. The transistor array layer includes a semiconductor layer 101, the semiconductor layer 101 includes an active region forming the transistor TFT; a gate insulating layer 102 located on the side of the semiconductor layer 101 away from the substrate 10; a gate metal layer 103 located on the side of the gate insulating layer 102 away from the substrate 10, the gate metal layer 103 includes a gate electrode forming the transistor TFT; a capacitor insulating layer 104 located on the side of the gate metal layer 103 away from the substrate 10; a capacitor metal layer 105 located on the side of the capacitor insulating layer 104 away from the substrate 10, the capacitor metal layer 105 includes a circuit A plate of the middle capacitor, the other plate of the capacitor can be located in the gate metal layer 103, or the other plate of the capacitor can be located in the source-drain metal layer 107; an interlayer insulating layer 106 located on the side of the capacitor metal layer 105 away from the substrate 10; a source-drain metal layer 107 located on the side of the interlayer insulating layer 106 away from the substrate 10, the source-drain metal layer 107 includes a source and a drain forming the transistor TFT, and the source and the drain are in contact with the active area through respective vias; a planarization layer 108 located on the side of the source-drain metal layer 107 away from the substrate 10. In addition, the display panel includes an anode layer 41 located on the side of the planarization layer 108 away from the substrate 10, the anode layer 41 includes a plurality of anode blocks, and the anode blocks are electrically connected to the source or drain of the corresponding transistor TFT in the pixel circuit through vias; and a pixel definition layer 50 located on the side of the anode layer 41 away from the substrate 10, the pixel definition layer 50 includes a plurality of pixel openings, and the pixel openings expose the anode blocks; a light emitting layer 42 located in the pixel openings and on the side of the anode layer 41 away from the substrate 10; and a cathode layer 43 located on the side of the light emitting layer 42 away from the substrate 10. In addition, the display panel also includes an encapsulation structure layer 60 located on the side of the cathode layer 43 away from the substrate 10, the encapsulation structure layer 60 includes a first inorganic film 61 located on the side of the cathode layer 43 away from the substrate 10, an organic film 62 located on the side of the first inorganic film 61 away from the substrate 10, and a second inorganic film 63 located on the side of the organic film 62 away from the substrate 10. The display panel is encapsulated by the encapsulation structure, and at least the purpose of preventing water vapor from corroding the internal circuit of the display panel is achieved. The display panel also includes at least one touch metal layer located on the packaging structure layer 60, such as a first touch metal layer 71 located on the packaging structure layer 60; a touch insulating layer 72 located on the side of the first touch metal layer 71 away from the substrate 10; and a second touch metal layer 73 located on the side of the touch insulating layer 72 away from the substrate 10, and also includes a protective layer located on the side of the touch metal layer 73 away from the substrate 10, etc. This is the same as the prior art and will not be elaborated on.Among them, at least two of the gate metal layer 103, the capacitor metal layer 105, the source-drain metal layer 107, the first touch metal layer 71 and the second touch metal layer 73 provided in the embodiment of the present application respectively include one of the crack detection lines 20. The crack detection line 20 is prepared by reusing the gate metal layer 103, the capacitor metal layer 105, the source-drain metal layer 107, the first touch metal layer 71 and the second touch metal layer 73, so that there is no need to prepare a new metal layer separately to make the crack detection line, which simplifies the preparation process of the display panel and reduces the preparation cost of the display panel.

[0071] In some embodiments, the opening area HL of the display panel provided in the embodiment of the present application needs to be completely cut and removed from the substrate 10 to the structural layer thereon to form a through hole. Therefore, a water vapor erosion channel is easily formed in the opening area HL, and a water vapor barrier 80 surrounding the opening area HL can be formed to prevent water vapor from corroding the display panel. Fig.16 and Fig.17 As shown, Fig.16 A schematic diagram of the structure of another display panel provided in an embodiment of the present application is shown in FIG. Fig.17 for Fig.16 The cross-sectional view in the DD' direction. The display panel provided in the embodiment of the present application also includes a plurality of water vapor barrier portions 80 surrounding the opening area HL, and the plurality of water vapor barrier portions 80 are nested; the opening crack detection line 20 is provided at the barrier gap between at least one pair of adjacent two water vapor barrier portions 80. Among them, at the water vapor barrier portion 80, the metal lines of all metal layers between the encapsulation structure layer 60 and the substrate 10 are in a disconnected state or a state without metal lines (optionally, the organic material structure layers such as the planarization layer are in a hollowed-out state at the water vapor barrier portion 80), and the purpose of blocking the erosion of the internal lines of the display panel by water vapor is achieved through the contact between adjacent insulating layers, especially the contact between adjacent inorganic insulating layers. In addition, the depression formed at the water vapor barrier portion 80 due to the absence of metal lines or the disconnection of metal lines is filled by the encapsulation structure layer 60, which is the same as the prior art, and the present application does not make redundant descriptions. It can be understood that, in the embodiment of the present application, by setting the crack detection line 20 at the partition gap between two adjacent water vapor partitions 80, firstly, it is possible to detect cracks in the structural layer at the opening area HL, and secondly, it is possible to reasonably utilize the wiring space. Fig.17 As shown, one of the opening crack detection lines 24 provided in the embodiment of the present application can be prepared by reusing the capacitor metal layer 105, and another opening crack detection line 24 can be prepared by reusing the first touch metal layer 71, and the present application does not make any specific limitation on this.

[0072] In some embodiments, the opening crack detection line 24 provided in the embodiment of the present application can be set at the isolation gap between two adjacent water vapor isolation parts 80. Since there is no metal circuit at the water vapor isolation part 80 or the metal circuit is in a disconnected state (that is, at least part or all of the metal circuits in the gate metal layer 103, the capacitor metal layer 105, the source and drain metal layer 107, the anode layer 41 and the cathode layer 43 are disconnected or there is no metal circuit here), therefore, when the opening crack detection line 24 is prepared by reusing the gate metal layer 103, the capacitor metal layer 105 and the source and drain metal layer 107, it cannot be led out through the connecting wires of the gate metal layer 103, the capacitor metal layer 105, the source and drain metal layer 107, the anode layer 41 and the cathode layer 43 to be electrically connected to the relevant detection circuit; in this regard, the embodiment of the present application can use the circuit of the touch metal layer to lead out the opening crack detection line 24 and electrically connect it to the detection circuit. For specific reference Fig.18 , which is a schematic diagram of the structure of another display panel provided by an embodiment of the present application, wherein the display panel provided by the embodiment of the present application includes a transistor array layer located on the substrate 10, the transistor array layer includes a gate metal layer 103, a capacitor metal layer 105 and a source-drain metal layer 107; and at least one touch metal layer located on a side of the transistor array layer away from the substrate 10; the gate metal layer 103, the capacitor metal layer 105 and the source-drain metal layer 107 have no metal circuits corresponding to the water vapor isolation portion 80; or the gate The portions of the gate metal layer 103, the capacitor metal layer 105 and the source-drain metal layer 107 corresponding to the water vapor barrier portion 80 are open circuited; wherein, at least one of the gate metal layer 103, the capacitor metal layer 105 and the source-drain metal layer 107 includes an opening crack detection line 24 located at the barrier gap; and, the touch metal layer includes at least one connecting lead 74; at the barrier gap, the opening crack detection line 24 is electrically connected to the connecting lead 74 through a via, and the connecting lead 74 is electrically connected to the detection circuit.

[0073] Continue as Fig.18 As shown, one of the opening crack detection lines 24 provided in the embodiment of the present application is prepared by reusing the capacitor metal layer 105, while the other opening crack detection line 24 can be prepared by reusing the first touch metal layer 71. The first touch metal layer 71 can be formed with a connecting lead 74, and the connecting lead 74 is electrically connected to the opening crack detection line 24 formed by the capacitor metal layer 105 through a via hole to electrically connect the opening crack detection line 24 to the detection circuit. In addition, the connecting lead 74 provided in the embodiment of the present application can also be prepared by reusing the second touch metal layer 73, and this application does not make specific restrictions on this. In addition, the opening crack detection line 24 prepared by the first touch metal layer 71 provided in the embodiment of the present application can be electrically connected to the detection circuit through the connecting wire prepared by the first touch metal layer 71.

[0074] In some embodiments, in at least one of the crack detection lines 20 provided in the embodiments of the present application, at least part of the extended line segments of the crack detection line 20 are straight extended line segments, which facilitates the manufacture of the crack detection line 20; specifically, it can be as follows Figure 4 In the continuous edge crack detection line 23 shown in FIG. 1 , at least one side of the display area AA, the extended line segment of the edge crack detection line 23 is a straight extended line segment; or Fig. 9 In the non-continuous edge crack detection line 23 shown, at least on one side of the display area AA, the extended line segment formed by the main detection blocks 203 in the edge crack detection line 23 is a straight extended line segment.

[0075] Alternatively, in at least one of the crack detection lines 20 provided in the embodiment of the present application, at least part of the extended line segments of the crack detection line 20 are arc extended line segments, which facilitates the manufacture of the crack detection line 20; specifically, Figure 6 In the continuous opening crack detection line 24 shown, at least part of the extended line segment of the opening crack detection line 24 is an arc extended line segment; or, as shown in FIG. Fig. 9 In the non-continuous open crack detection line 24 shown, an extended line segment formed by some adjacent main detection blocks 203 in the open crack detection line 24 is an arc extended line segment.

[0076] Alternatively, in at least one of the crack detection lines 20 provided in the embodiment of the present application, at least part of the extended line segments of the crack detection line 20 are segmented broken line extended line segments, thereby expanding the detection range of the crack detection line 20 and improving the crack detection effect; taking the edge crack detection line 23 as an example, specifically as follows Fig.19 In the continuous edge crack detection line 23 shown in FIG. 1 , at least one side of the display area AA, the extension line segment of the edge crack detection line 23 is a segmented broken line extension line segment; or Fig. 20 In the non-continuous edge crack detection line 23 shown, at least on one side of the display area AA, the extended line segment formed by the main detection blocks 203 in the edge crack detection line 23 is a segmented broken line extended line segment.

[0077] Based on the same inventive concept, the embodiment of the present application further provides a method for detecting cracks in a display panel, and the method for detecting cracks in the display panel provided by any of the above embodiments. Fig.21 FIG. 1 is a flow chart of a crack detection method provided in an embodiment of the present application, wherein the crack detection method provided in an embodiment of the present application includes:

[0078] S11 . Applying a capacitance detection signal to two crack detection lines 20 having at least a partially overlapping area to obtain a detection capacitance between the two crack detection lines 20 .

[0079] S12. Determine whether there is a crack in the film layer at the overlapping area between the two crack detection lines 20 according to the difference between the detected capacitance and the set capacitance.

[0080] In some embodiments, among the two crack detection lines 20 having at least a partial overlapping area, one of the crack detection lines 20 includes a plurality of main detection blocks 203 divided in its extension direction, and the main detection block 203 has at least a partial overlapping area with the other crack detection line 20 in the first direction Z, wherein obtaining the detection capacitance between the two crack detection lines 20 includes: applying a capacitance detection signal to the two crack detection lines 20, wherein the capacitance detection signal includes an alternating current signal applied to the other crack detection line 20; obtaining the detection capacitance between the main detection block 203 and the other crack detection line 20, wherein, based on the difference between the detection capacitance and a set capacitance, it is determined whether there is a crack in the film layer at the overlapping area between the main detection block 203 and the other crack detection line 20.

[0081] That is, in the technical solution provided by the embodiment of the present application, in the two crack detection lines 20 having at least a partially overlapping area, the capacitance detection signal can be an alternating current signal applied to one crack detection line 20, while the other crack detection line 20 is used to output a detection capacitance. Figure 3 In the crack detection circuit shown, in two continuous edge crack detection lines 23, an AC signal can be applied to any edge crack detection line 23, and then the detection capacitance is obtained through the other edge crack detection line 23, and then according to the difference between the detection capacitance and the set capacitance, it is judged whether there is a crack in the film layer between the two edge crack detection lines 23. In addition, the technical solution provided in the embodiment of the present application does not need to apply the detection signal to the line through the switching of the transistor when applying the detection signal (capacitance detection signal and resistance detection signal) to the crack detection line 20, so there is no need to consider the influence of factors such as transistor leakage, which improves the stability of the signal applied to the crack detection line 20 and ensures a higher effect of crack detection.

[0082] Or Figure 8As shown, in a crack detection circuit of a continuous edge crack detection line 23 and an edge crack detection line 23 divided into a first detection line 201 and a second detection line 202, an AC signal can be applied to the continuous edge crack detection line 23, and the corresponding detection capacitances of the first detection line 201 and the second detection line 202 are obtained, and then according to the difference between the two obtained detection capacitances and the corresponding set capacitances, it is judged whether there is a crack in the film layer between the first detection line 201 and the continuous edge crack detection line 23, and whether there is a crack in the film layer between the second detection line 202 and the continuous edge crack detection line 23. Similarly, when the opening crack detection line 24 is divided into the first detection line 201 and the second detection line 202, and the first detection line 201 and the second detection line 202 both have an overlapping area with a continuous opening crack detection line 24, the above-mentioned method of applying a capacitance detection signal can be used to perform crack detection.

[0083] Or Fig. 9 As shown, in a crack detection circuit in which a continuous edge detection line and an edge crack detection line 23 are divided into a plurality of main detection blocks 203, an AC signal can be applied to the continuous edge crack detection line 23, and the corresponding detection capacitance can be obtained through each main detection block 203, and then according to the difference between the obtained multiple detection capacitances and the corresponding set capacitances, it is judged whether there is a crack in the film layer between different main detection blocks 203 and the continuous edge crack detection line 23. Similarly, when the opening crack detection line 24 is divided into a plurality of main detection blocks 203, and all the main detection blocks 203 have an overlapping area with a continuous opening crack detection line 24, the above-mentioned method of applying a capacitance detection signal can be used for crack detection.

[0084] Or Fig.10 As shown, in a crack detection circuit in which an edge crack detection line 23 is divided into a first detection line 201 and a second detection line 202, and an edge crack detection line 23 is divided into a plurality of main detection blocks 203, an AC signal can be applied to the first detection line 201 and the second detection line 202, and a respective corresponding detection capacitance is obtained through each main detection block 203, and then, according to the difference between the obtained plurality of detection capacitances and the respective corresponding set capacitances, it is determined whether there is a crack in the film layer between different main detection blocks 203 and the first detection line 201, and between different main detection blocks 203 and the second detection line 202. Similarly, when an opening crack detection line 24 is divided into a plurality of main detection blocks 203, and all the main detection blocks 203 have an overlapping area with an opening crack detection line 24 divided into the first detection line 201 and the second detection line 202, the above-mentioned method of applying a capacitance detection signal can be used for crack detection.

[0085] Or Fig.11As shown, in a crack detection circuit in which an edge crack detection line 23 is divided into a plurality of main detection blocks 203 and an edge crack detection line 23 is divided into a plurality of auxiliary detection blocks 203, an alternating current signal can be applied to the main detection block 203, and the corresponding detection capacitances of each can be obtained through the auxiliary detection block 204 (or an alternating current signal can be applied to the auxiliary detection block 204, and the corresponding detection capacitances of each can be obtained through the main detection block 203), and then, according to the difference between the obtained plurality of detection capacitances and the corresponding set capacitances, it is determined whether there are cracks in the film layer between different main detection blocks 203 and the corresponding auxiliary detection blocks 204. Similarly, when an opening crack detection line 24 is divided into a plurality of main detection blocks 203, and all the main detection blocks 203 have an overlapping area with an opening crack detection line 24 divided into a plurality of auxiliary detection blocks 204, the above-mentioned method of applying capacitance detection signals can be used for crack detection.

[0086] Furthermore, before using the crack detection circuit to perform capacitance detection, the crack detection line 20 may be tested for any breakage. Fig. 20 As shown, it is a flow chart of another crack detection method provided by an embodiment of the present application, wherein, before step S11, that is, before applying the capacitance detection signal to the crack detection line 20, it also includes: S01, applying a resistance detection signal to the crack detection line 20 to determine whether the crack detection line 20 has a crack, and if not, applying the capacitance detection signal to the two crack detection lines 20 having at least a partially overlapping area. Wherein, the resistance detection signal can be a fixed voltage signal, by applying a fixed voltage signal to one end of the crack detection line 20, if there is no fracture on the crack detection line 20, the other end of the crack detection line 20 will detect that the overall resistance of the crack detection line 20 is a set resistance; if there is a fracture on the crack detection line 20, the other end of the crack detection line 20 will detect that the resistance of the crack detection line 20 is infinite, thereby firstly detecting whether the crack detection line 20 has a crack, thereby improving the reliability of crack detection.

[0087] In some embodiments, the resistance detection signal provided in the embodiments of the present application can reuse the power supply voltage, cathode voltage, or reference voltage in the display panel. Fig.23As shown, it is a structural schematic diagram of a pixel circuit provided in an embodiment of the present application, wherein the display panel includes a pixel circuit electrically connected to the light-emitting diode D101, the pixel circuit can be a 7T1C circuit (the present application does not make specific restrictions on this, in some other embodiments, the pixel circuit can also include other numbers of transistors and capacitors), the pixel circuit includes a first transistor T101, a second transistor T102, a third transistor T103, a fourth transistor T104, a fifth transistor T105, a sixth transistor T106, a seventh transistor T107, a storage capacitor C101, a light-emitting diode D101, a first scan signal terminal SCAN101, a second scan signal terminal SCAN102, a light-emitting control signal terminal EMIT, a data signal terminal DATA, a power supply voltage terminal PVDD, a cathode voltage terminal PVEE, a reference voltage terminal VREF, a first node N101, and a second node N102, wherein the third transistor T103 drives the light-emitting diode D101 to emit light. Among them, the power supply voltage provided in the embodiment of the present application is the voltage output by the power supply voltage terminal PVDD, the cathode voltage is the voltage output by the cathode voltage terminal PVEE, and the reference voltage is the voltage output by the reference voltage terminal VREF.

[0088] It should be noted that the resistance detection signal provided in the embodiment of the present application is not limited to the power supply voltage, cathode voltage, or reference voltage in the above-mentioned display panel. It can also reuse other fixed voltages in the display panel, or it can also be a fixed voltage output by the detection circuit alone. The present application does not make any specific restrictions on this.

[0089] Based on the same inventive concept, the embodiment of the present application also provides an electronic device. Fig.24 , which is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application, wherein the electronic device 1000 provided in an embodiment of the present application includes a display panel provided in any one of the above embodiments.

[0090] In some embodiments, the electronic device 1000 provided in the embodiments of the present application may be a mobile terminal, a notebook, a tablet computer, a computer, a wearable device, a vehicle-mounted display device, or the like, and the present application does not impose any specific restrictions on this.

[0091] In summary, the embodiments of the present application provide a display panel, a crack detection method thereof, and an electronic device, wherein the display panel includes a substrate; and a crack detection circuit located on one side of the substrate, wherein the crack detection circuit includes at least two crack detection lines arranged in sequence in a first direction, and two adjacent crack detection lines are insulated and isolated; in the first direction, any one of the crack detection lines has at least a partial overlapping area with at least one other crack detection line, and the first direction is a direction perpendicular to the plane where the display panel is located.

[0092] As can be seen from the above content, the crack detection circuit provided in the embodiment of the present application includes crack detection lines that are at least partially overlapped in the first direction. Therefore, when the crack detection circuit is used for crack detection, it can be determined whether the film layer between the two crack detection lines has cracks based on the capacitance change between the two crack detection lines with the overlapping area, thereby completing the crack detection process of the display panel. The technical solution provided in the embodiment of the present application can realize crack detection of the intermediate film layer between different crack detection lines, thereby improving the detection effect of crack detection of the display panel. In addition, the crack detection circuit provided in the embodiment of the present application has a simple structure and occupies a small effective wiring area in the display panel.

[0093] In the description of the embodiments of the present application, it needs to be understood that the orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0094] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0095] In the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0096] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0097] In the embodiments of the present application, if the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradicting each other.

[0098] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: substrate; And, a crack detection circuit located on one side of the substrate, the crack detection circuit includes at least two crack detection lines arranged in sequence in a first direction, and two adjacent crack detection lines are insulated and isolated; in the first direction, any one of the crack detection lines has at least a partial overlapping area with at least one other crack detection line, and the first direction is a direction perpendicular to the plane where the display panel is located.

2. The display panel according to claim 1, characterized in that: At least one of the crack detection lines is a continuous detection line.

3. The display panel according to claim 1, characterized in that: At least one of the crack detection lines includes a first detection line and a second detection line divided in its extension direction; the first detection line and the remaining at least one crack detection line have at least a partial overlapping area in the first direction, and the second detection line and the remaining at least one crack detection line have at least a partial overlapping area in the first direction.

4. The display panel according to claim 1, characterized in that: Among the two crack detection lines having at least a partial overlap area, one crack detection line includes a plurality of main detection blocks divided in its extending direction, and the main detection blocks have at least a partial overlap area with the other crack detection line in the first direction.

5. The display panel according to claim 4, characterized in that: The other crack detection line is a continuous detection line; Alternatively, the another crack detection line includes a first detection line and a second detection line divided in the extension direction thereof, the first detection line and at least a part of the main detection block have at least a part of overlapping areas in the first direction, and the second detection line and the remaining part of the main detection block have at least a part of overlapping areas in the first direction; Alternatively, the another crack detection line includes a plurality of auxiliary detection blocks divided in its extending direction, and one of the auxiliary detection blocks has at least a partial overlapping area with one of the main detection blocks in the first direction.

6. The display panel according to claim 1, characterized in that: The display panel comprises a transistor array layer located on the substrate, wherein the transistor array layer comprises a gate metal layer and a source-drain metal layer; The gate metal layer and the source-drain metal layer each include one crack detection line.

7. The display panel according to claim 1, characterized in that: The display panel comprises a transistor array layer located on the substrate, wherein the transistor array layer comprises a gate metal layer, a capacitor metal layer and a source-drain metal layer; At least two of the gate metal layer, the capacitor metal layer and the source / drain metal layer respectively include one crack detection line.

8. The display panel according to claim 1, characterized in that: The display panel comprises a transistor array layer located on the substrate, the transistor array layer comprising a gate metal layer, a capacitor metal layer and a source / drain metal layer; and at least one touch metal layer located on a side of the transistor array layer away from the substrate; At least two of the gate metal layer, the capacitor metal layer, the source / drain metal layer and the touch metal layer respectively include one crack detection line.

9. The display panel according to any one of claims 1 to 8, characterized in that: The display panel includes a display area and a non-display area located outside the display area; The crack detection line includes an edge crack detection line located in the non-display area, and the edge crack detection line is extended along the edge line of the display area, wherein any one of the edge crack detection lines has at least a partial overlapping area with at least one other edge crack detection line in the first direction.

10. The display panel according to claim 9, characterized in that: The non-display area includes a chip binding area and a bending area between the chip binding area and the display area; The edge crack detection line at least extends to the bending area.

11. The display panel according to any one of claims 1 to 8, characterized in that: The display panel includes an opening area located in the display area; The crack detection lines include opening crack detection lines located in the display area, and the opening crack detection lines are arranged along a direction surrounding the opening area, wherein any one of the opening crack detection lines has at least a partial overlapping area with at least one other opening crack detection line in the first direction.

12. The display panel according to claim 11, characterized in that: The display panel further comprises at least two water vapor blocking portions surrounding the opening area, wherein the at least two water vapor blocking portions are nested with each other; The opening crack detection line is arranged at the isolation gap between at least one pair of adjacent two water vapor isolation parts.

13. The display panel according to claim 12, characterized in that: The display panel comprises a transistor array layer located on the substrate, the transistor array layer comprising a gate metal layer, a capacitor metal layer and a source / drain metal layer; and at least one touch metal layer located on a side of the transistor array layer away from the substrate; There is no metal circuit at the gate metal layer, the capacitor metal layer and the source-drain metal layer corresponding to the water vapor blocking portion; or, the gate metal layer, the capacitor metal layer and the source-drain metal layer corresponding to the water vapor blocking portion are open circuited; Among them, at least one of the gate metal layer, the capacitor metal layer and the source / drain metal layer includes an opening crack detection line located at the partition gap; and the touch metal layer includes at least one connecting lead line; at the partition gap, the opening crack detection line is electrically connected to the connecting lead line through a via.

14. The display panel according to any one of claims 1 to 8, characterized in that: In at least one of the crack detection lines, at least part of the extended line segments of the crack detection line are straight line segments, arc line segments, or segmented broken line segments.

15. An electronic device, characterized in that: The electronic device comprises the display panel according to any one of claims 1 to 14.

16. A method for detecting cracks in a display panel, characterized in that: For detecting the display panel according to any one of claims 1 to 14, the crack detection method comprises: Applying a capacitance detection signal to two crack detection lines having at least a partially overlapping area to obtain a detection capacitance between the two crack detection lines; According to the difference between the detected capacitance and the set capacitance, it is determined whether there is a crack in the film layer at the overlapping area between the two crack detection lines.

17. The method for detecting cracks in a display panel according to claim 16, wherein: Before applying the capacitance detection signal to the crack detection line, the method further includes: A resistance detection signal is applied to the crack detection line to determine whether the crack detection line has a crack, and if not, the capacitance detection signal is applied to two crack detection lines having at least a partially overlapping area.

18. The method for detecting cracks in a display panel according to claim 17, wherein: The resistance detection signal multiplexes the power supply voltage, cathode voltage, or reference voltage in the display panel.

19. The method for detecting cracks in a display panel according to claim 16, wherein: Among the two crack detection lines having at least a partial overlapping area, one of the crack detection lines includes a plurality of main detection blocks divided in its extension direction, and the main detection blocks have at least a partial overlapping area with the other crack detection line in the first direction, wherein obtaining the detection capacitance between the two crack detection lines includes: Applying a capacitance detection signal to the two crack detection lines, wherein the capacitance detection signal comprises an alternating current signal applied to the other crack detection line; A detection capacitance between the main detection block and the other crack detection line is obtained, wherein, according to a difference between the detection capacitance and a set capacitance, it is determined whether there is a crack in the film layer at an overlapping area between the main detection block and the other crack detection line.

Images