Display panel, crack detection method thereof and display device

Abstract

The invention discloses a display panel, a crack detection method thereof and a display device. The display panel comprises a display area, a non-display area, a substrate and a detection signal line. The detection signal line comprises a first detection wiring part and a second detection wiring part which are arranged in a stacked mode. The display panel further comprises a wire changing hole, the first detection wiring part comprises a first wire changing section, the second detection wiring part comprises a second wire changing section, orthographic projections of the first detection wiring part and the second detection wiring part on the substrate in the thickness direction are at least partially overlapped, and the first wire changing section and the second wire changing section are electrically connected through the wire changing hole. At least the width dimension of the second commutation segment is smaller than the width dimension of the first commutation segment. According to the display panel provided by the embodiment of the invention, the first detection wiring part and the second detection wiring part which are arranged in a stacked manner are adopted, the width of the second commutation section is limited to be smaller than that of the first commutation section at the lap joint position, the size of the detection signal line in the width direction is compressed, meanwhile, a process tolerance space is reserved for alignment deviation, and the lap joint yield is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display devices, in particular to a display panel, a crack detection method thereof and a display device. BACKGROUND

[0002] In the manufacturing of an OLED display panel, a crack detection circuit is usually integrated in a frame area to determine whether the panel has cracks by detecting the resistance value of a metal wire.

[0003] In order to achieve the required resistance value, the wire must have sufficient length. In a conventional scheme, multiple turns of planar winding are performed in the same metal layer, which results in a relatively large width occupied by the circuit in the horizontal direction, thereby becoming a major constraint for achieving a narrow frame. SUMMARY

[0004] The present application provides a display panel, a crack detection method thereof and a display device, which can further compress the space occupied by the crack detection circuit in the frame while improving the yield of the lapping of crack detection wires in different layers.

[0005] In a first aspect, the present application provides a display panel, which includes a display area and a non-display area surrounding the display area at least in part, and further includes a substrate, a detection signal line located on one side of the substrate and in the non-display area, the detection signal line including a first detection wire part and a second detection wire part stacked along the thickness direction of the substrate, the second detection wire part being located on the side of the first detection wire part away from the substrate, and the display panel further including a wire changing hole, the first detection wire part including a first wire changing segment, the second detection wire part including a second wire changing segment, the first detection wire part and the second detection wire part at least partially overlapping in the orthographic projection of the substrate along the thickness direction, and the first wire changing segment and the second wire changing segment being electrically connected through the wire changing hole, the width dimension of at least the second wire changing segment being smaller than the width dimension of the first wire changing segment.

[0006] The display panel provided by the first aspect of the present application uses the first detection wire part and the second detection wire part stacked along the thickness direction of the substrate, and limits the width dimension of the second wire changing segment to be smaller than the width dimension of the first wire changing segment at the position of the first wire changing segment and the second wire changing segment lapped through the wire changing hole, thereby compressing the size of the detection signal line in the width direction while actively reserving a process tolerance space for alignment deviation in the design. Even if there is a certain alignment deviation, the wider first wire changing segment can still ensure that the second wire changing segment and the wire changing hole are provided with sufficient and stable overlapping areas and metal edge covering margins, thereby ensuring the yield of lapping.

[0007] Secondly, according to embodiments of this application, a crack detection method for a display panel is provided. The display panel includes a display area and a non-display area at least partially surrounding the display area. The display panel also includes a substrate and a detection signal line. The detection signal line is located on one side of the substrate and in the non-display area. The detection signal line includes a first detection trace and a second detection trace stacked along the thickness direction of the substrate. The second detection trace is located on the side of the first detection trace facing away from the substrate. The display panel also includes a wire-changing hole. The first detection trace includes a first wire-changing segment, and the second detection trace includes a second wire-changing segment. The orthographic projections of the first detection trace, the wire-changing hole, and the second detection trace in the thickness direction at least partially overlap, and the first wire-changing segment and the second wire-changing segment are electrically connected through the wire-changing hole. At least the width of the second wire-changing segment is smaller than the width of the first wire-changing segment. The crack detection method includes: An input signal is provided to the first detection wiring section and / or the second detection wiring section, wherein the first detection wiring section and / or the second detection wiring section acquires the crack detection signal; The presence of cracks in the display panel is determined based on crack detection signals.

[0008] Thirdly, according to embodiments of this application, a display device is provided, including the display panel provided in any of the first aspects of this application. Attached Figure Description

[0009] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0010] Figure 1 This is a schematic diagram of the planar structure of a display panel provided in the first aspect embodiment of this application; Figure 2 yes Figure 1 A magnified structural diagram of region A in the middle; Figure 3 yes Figure 2 A schematic diagram of a cross-sectional structure along the BB direction; Figure 4 yes Figure 1 A magnified structural diagram of region C in the middle; Figure 5 yes Figure 4 A schematic diagram of a cross-sectional structure along the DD direction; Figure 6 yes Figure 1 Another enlarged structural diagram of region C in the middle; Figure 7 yes Figure 6 A schematic diagram of another cross-sectional structure along the DD direction; Figure 8 This is a schematic diagram of another display panel structure provided in the first aspect embodiment of this application; Figure 9 is a schematic diagram of a planar structure of another display panel provided by a first aspect of the present application; Figure 10 is Figure 1 is a schematic diagram of an enlarged structure of an E area in Figure 11 is Figure 10 is a schematic diagram of a cross-sectional structure along a direction of F-F in Figure 12 is a step flow chart of a crack detection method of another display panel provided by a second aspect of the present application; Figure 13 is a schematic diagram of an overall structure of a display device provided by a third aspect of the present application.

[0011] wherein: 100 - display panel; AA - display area; NA - non-display area; NA1 - first sub-area; NA2 - second sub-area; 10 - substrate; 20 - detection signal line; 20a - first sub-section; 20b - second sub-section; 201 - first detection trace part; 21 - first line changing section; 202 - second detection trace part; 202a - first end; 202b - second end; 22 - second line changing section; 203 - third detection trace part; 23 - third line changing section; 204 - fourth detection trace part; 24 - fourth line changing section; 205 - first connecting part; 206 - second connecting part; 30 - line changing hole; 301 - first line changing sub-hole; 302 - second line changing sub-hole; 303 - third line changing sub-hole; 304 - fourth line changing sub-hole; 200 - display device.

[0012] In the drawings, the same components have the same reference numerals, and the drawings are not drawn according to the actual proportions. DETAILED DESCRIPTION

[0013] Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some or all of these specific details. The description of the embodiments is merely illustrative of the present application and is not intended to limit the present application, as is apparent to one of ordinary skill in the art. In the drawings and the following description, well-known structures and techniques have not been shown in order not to obscure the present application; and, for the purpose of clarity, some of the structures have been exaggerated. Furthermore, features, structures or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0014] The orientation words appearing in the following description are the directions shown in the drawings, and are not intended to limit the specific structure of the display panel and display module of the present application. In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0015] In the related art, in the manufacturing process of an organic light emitting diode (OLED) display panel, in order to ensure product reliability, a crack detection circuit (PCD) is usually integrated in the frame area of the panel periphery.

[0016] The principle of the PCD circuit is to lay a continuous metal wire around the panel edge, and to judge whether the panel has cracks by measuring the resistance value at the two ends of the PCD circuit. If the resistance value is normal, it indicates that the panel is intact; if the resistance value becomes infinite or exceeds the specification range, it indicates that the crack has caused the PCD circuit to be open, and there is a crack problem.

[0017] In order to meet the specific resistance value required for detection sensitivity, the wire of the PCD circuit must have sufficient length. The traditional design scheme mainly adopts two layout methods, one is that the wire only surrounds half of the screen, and the other is that the wire completely surrounds the entire screen. The two methods of half-screen winding and full-screen winding often exist simultaneously to provide redundant detection.

[0018] However, in order to obtain the required wire length in the limited frame, the traditional technology chooses to make multiple turns and dense planar winding in the same metal layer. The length of the wire corresponding to the resistance value also increases, which means that the width occupied by the wire in the horizontal direction in the frame area increases.

[0019] With the pursuit of visual experience in the consumer electronics market, narrow frame and even frameless design has become a clear direction for the development of display panels, and the horizontal space occupied by the traditional crack detection circuit is becoming a bottleneck restricting the further compression of the frame.

[0020] In order to break through the bottleneck of further compression of the frame caused by the PCD wiring, the existing technology changes the originally distributed wires in the same plane to multiple layers of stacking in the vertical direction, using at least two layers, or even three layers or more metal wires, which are arranged in sequence in the thickness direction, and the wires at different levels are connected in series to form a complete detection loop through the via.

[0021] Using existing technologies, it is theoretically possible to stack the required length of wires in the thickness direction, thereby reducing the overall horizontal projection width of the wires and freeing up space for narrow bezel designs.

[0022] In a multi-layer metal stacked structure, the upper metal traces and the lower metal traces need to be electrically connected through contact holes formed by etching the insulating layer between them.

[0023] To ensure that the contact hole has the minimum required size, can be successfully filled with metal and form a reliable connection, and ensure that the metal of the conductor has sufficient edges to surround the contact hole to prevent corrosion or open circuits (i.e., metal edging), the upper and lower layer traces must have sufficient overlap at the preset connection positions.

[0024] However, due to misalignment between different film layers, slight misalignment errors are unavoidable in actual manufacturing processes such as photolithography and etching. If each metal trace uses the same width, the effective overlap area at the connection point of the upper and lower layers may be reduced or even misaligned when misalignment occurs. This can result in the inability to create vias that meet dimensional requirements, or even if vias are created, the metal cladding around the vias may not meet the process reliability requirements.

[0025] Connection failures caused by misalignment issues in two-layer traces challenge the electrical connectivity and functional reliability of the entire crack detection circuit, making multi-layer trace stacking series solutions challenging in the pursuit of high yield and high reliability in large-scale production.

[0026] In order to solve the above-mentioned technical problems and for technical considerations, the embodiments of this application provide a display panel and a crack detection method and display device thereof, which can further reduce the space occupied by the traces of the crack detection circuit in the bezel, while improving the overlap yield of crack detection traces in different layers.

[0027] The following will combine Figures 1 to 13 The present application provides a more detailed description of a display panel, a crack detection method thereon, and a display device according to the first aspect of the present application.

[0028] Figure 1 This illustration shows a planar structure of a display panel 100 provided in a first aspect embodiment of this application. Figure 2 It shows Figure 1 The magnified structure of region A in the middle, Figure 3 It shows Figure 2 Cross-sectional structure along the BB direction.

[0029] Please see Figures 1 to 3In a first aspect, the embodiments of the present application provide a display panel 100, which comprises a display area AA and a non-display area NA surrounding the display area AA at least partially, and further comprises a substrate 10 and a detection signal line 20.

[0030] The detection signal line 20 is located on one side of the substrate 10 and in the non-display area NA, and comprises a first detection trace portion 201 and a second detection trace portion 202 stacked along the thickness direction of the substrate 10. The second detection trace portion 202 is located on the side of the first detection trace portion 201 away from the substrate 10. The display panel 100 further comprises a wire changing hole 30. The first detection trace portion 201 comprises a first wire changing segment 21, and the second detection trace portion 202 comprises a second wire changing segment 22. The first detection trace portion 201 and the second detection trace portion 202 at least partially overlap in the orthographic projection of the substrate 10 along the thickness direction, and the first wire changing segment 21 and the second wire changing segment 22 are electrically connected through the wire changing hole 30. The width dimension of at least the second wire changing segment 22 is smaller than the width dimension of the first wire changing segment 21.

[0031] The display panel 100 provided by the first aspect of the present application adopts the first detection trace portion 201 and the second detection trace portion 202 stacked along the thickness direction of the substrate 10, and limits the width dimension of the second wire changing segment 22 to be smaller than the width dimension of the first wire changing segment 21 at the position where the first wire changing segment 21 and the second wire changing segment 22 are overlapped through the wire changing hole 30. The size of the detection signal line 20 in the width direction is compressed, and at the same time, process tolerance space is actively reserved for alignment deviation in the design. Even if there is a certain alignment deviation, the wider first wire changing segment 21 can still ensure that the second wire changing segment 22 and the wire changing hole 30 are provided with sufficient and stable overlapping area and metal edge allowance, so as to ensure the yield of the overlap.

[0032] The display panel 100 provided by the first aspect of the present application first adopts the first detection trace portion 201 and the second detection trace portion 202 stacked along the thickness direction of the substrate 10, and realizes electrical connection through the wire changing hole 30 in the overlapping area of the first detection trace portion 201 and the second detection trace portion 202, so as to effectively convert the traditional planar detection signal line 20 into a three-dimensional stacked structure.

[0033] The stacked structure of the detection signal line 20 reduces the horizontal layout width of the detection signal line 20 in the non-display area NA, and provides a key structural basis for the display panel 100 to realize narrow-frame or even frameless design.

[0034] The display panel 100 provided by the first aspect of the present application further limits the width dimension of at least the second wire changing segment 22 to be smaller than the width dimension of the first wire changing segment 21 in the connection area of the wire changing hole 30.

[0035] The width dimension of the second wire changing section 22 is smaller than the width dimension of the first wire changing section 21. This design is for the process alignment problem in the multi-layer stacked structure. In the manufacturing process, when the second detection wire section 202 in the upper layer and the first detection wire section 201 in the lower layer need to form a wire changing hole 30 to realize connection through the photoetching and etching process, the alignment deviation between the first detection wire section 201 and the second detection wire section 202, if the width of the upper and lower layer wires is the same or the upper layer is wider, the slight alignment error can easily lead to insufficient effective overlapping area for reliable hole opening, and further cause process defects such as non-standard size of the wire changing hole 30 or insufficient metal edge around the hole, and finally it is difficult to realize the stability of the electrical connection and the guarantee of the circuit yield.

[0036] By limiting the second wire changing section 22 near the lap joint area to be narrower than the first wire changing section 21 for mutual lap joint through the lap joint hole, the process tolerance space is actively reserved for the alignment deviation in the design.

[0037] Even if there is a certain alignment deviation, the wider first wire changing section 21 can still ensure to provide sufficient and stable overlapping area and metal edge allowance for the second wire changing section 22 and the wire changing hole 30, so that the wire changing hole 30 can be stably made in a reliable position meeting the size requirements, and the firmness and conductive reliability of the series connection between the first detection wire section 201 and the second detection wire section 202 are guaranteed.

[0038] Exemplarily, the substrate 10 includes a flexible material or a rigid material for serving as a bearing basis of the detection signal line 20, and the detection signal line 20 is a metal material.

[0039] Exemplarily, the substrate 10 includes polyimide, and the display panel 100 can realize flexible bending.

[0040] Optionally, the substrate 10 includes a glass substrate 10.

[0041] Exemplarily, the wire changing hole 30 is a rectangle in the orthographic projection of the substrate 10, and the side length dimension of the wire changing hole 30 is at least 2 microns, and the width dimension of the metal edge outside the wire changing hole 30 is at least 1 micron.

[0042] Exemplarily, the first wire changing section 21 and the second wire changing section 22 should be understood as that the first wire changing section 21 at least includes the part of the first detection wire section 201 for forming the wire changing hole 30 and the metal edge around the wire changing hole 30 by overlapping with the second wire changing section 22, and the second wire changing section 22 at least includes the part of the second detection wire section 202 for forming the wire changing hole 30 and the metal edge around the wire changing hole 30 by overlapping with the first wire changing section 21.

[0043] Exemplarily, Figure 1The first detection wire section 201 and the second detection wire section 202 are arranged around the full screen, which can maximize the resistance of the detection signal line. Those skilled in the art can flexibly adjust the positions of the first wire changing section 21 and the second wire changing section 22 according to the actual design resistance needs, the winding mode and the opening accommodation specification. The first aspect of the present application is not limited to the arrangement of Figure 1 The positions of the first wire changing section 21 and the second wire changing section 22 are shown in the figure.

[0044] Exemplarily, Figure 1 The winding mode shown in the figure is only one embodiment. The winding mode of the detection signal line 20 in the display panel 100 provided by the embodiments of the present application can also be a half-screen winding or other modes. Other embodiments of the display panel provided by the first aspect of the present application will be further described in subsequent embodiments of the first aspect.

[0045] Please continue to refer to Figures 1 to 3 In some embodiments, the length dimension of the second detection wire section 202 does not exceed the length dimension of the first detection wire section 201, and the width dimension of the second detection wire section 202 does not exceed the width dimension of the first detection wire section 201.

[0046] In these embodiments, the length dimension and the width dimension of the second detection wire section 202 are both limited to be smaller than the first detection wire section 201, which further facilitates the alignment in the wire preparation process, reduces the alignment error, ensures the overlapping area of the first wire changing section 21 of the first detection wire section 201 and the second wire changing section 22 of the second detection wire section 202, and can effectively prepare the wire changing hole 30, further ensuring the firmness and conductive reliability of the series connection between the first detection wire section 201 and the second detection wire section 202.

[0047] The design of limiting the width dimension and the length dimension of the second detection wire section 202 means that the second detection wire section 202 is contained or aligned by the first detection wire section 201 in the overall size, thereby providing a more relaxed alignment tolerance in the preparation process.

[0048] When the second detection wire section 202 does not exceed the range of the first detection wire section 201 in both length and width dimensions, even if there is a certain interlayer offset in manufacturing, the first detection wire section 201 can always provide sufficient and stable support substrate for the second detection wire section 202, ensuring that the two maintain sufficient overlapping area at the preset connection position. Not only does this reduce the process complexity, but it also reduces the risk of connection failure caused by alignment error.

[0049] Specifically, the first detection trace part 201 serves as a lower structure, and its larger size provides a reliable reference boundary for positioning of the upper second detection trace part 202; and the second detection trace part 202 is arranged within the range of the first detection trace, and when the wire changing hole 30 is formed, the hole position can always fall within the effective area of the first detection trace part 201, thereby ensuring that the wire changing hole 30 has a metal edge of sufficient size around it, and avoiding hole defects or insecure connection caused by alignment deviation.

[0050] Please continue to refer to Figures 1 to 3 In some embodiments, the first wire changing segment 21, the wire changing hole 30, and the second wire changing segment 22 at least partially overlap in orthographic projection along the thickness direction of the substrate 10.

[0051] In these embodiments, the orthographic projection overlap relationship of the first wire changing segment 21, the wire changing hole 30, and the second wire changing segment 22 is further limited, and when viewed from a direction perpendicular to the substrate 10, the area for achieving electrical connection, i.e., the first wire changing segment 21 of the lower layer, the wire changing hole 30 itself for interlayer communication, and the second wire changing segment 22 of the upper layer, have a shared overlapping area on the horizontal projection plane, which determines the connection area.

[0052] The first wire changing segment 21 serves as the basis for connection and provides a determined planar position for the wire changing hole 30; the wire changing hole 30 itself serves as a vertical direction communication channel, and its position must be accurately within the projection overlap area; and the second wire changing segment 22 needs to be aligned with the projection overlap area to complete the lapping.

[0053] With the size relationship limitation between the second detection trace part 202 and the first detection trace part 201, the first wire changing segment 21, the wire changing hole 30, and the second wire changing segment 22 ensure that even if there is a certain interlayer alignment fluctuation in subsequent actual photolithography and etching processes, the wire changing hole 30 can be successfully prepared within the effective metal area where the first wire changing segment 21 and the second wire changing segment 302 overlap.

[0054] Exemplarily, the first wire changing segment 21 and the second wire changing segment 22 overlap, and the first wire changing segment 21 and the second wire changing segment 22 overlap with the wire changing hole 30, respectively, and the first wire changing segment 21 and the second wire changing segment 22 are connected through the intermediate bridge communication structure.

[0055] Optionally, the wire changing hole 30 is opened between the first wire changing segment 21 and the second wire changing segment 22, and the second wire changing segment 22 directly lapped with the first wire changing segment 21 through the wire changing hole 30.

[0056] The connection mode of the first wire changing segment 21 and the second wire changing segment 22 will be further described in subsequent embodiments of the first aspect of the application.

[0057] Please continue to refer to Figures 1 to 3In some embodiments, the length dimension of the second detection trace portion 202 is smaller than that of the first detection trace portion 201, the first wire changing segment 21 is located at at least one end of the first detection trace portion 201, the second wire changing segment 22 is located at at least one end of the second detection trace portion 202, and the first wire changing segment 21 is arranged beyond the second wire changing segment 22.

[0058] In these embodiments, the first wire changing segment 21 is arranged beyond the second wire changing segment 22 at the side where the first wire changing segment 21 and the second wire changing segment 22 overlap, ensuring that the entire projection dimension of the second wire changing segment 22 in the length direction falls within the first wire changing segment 21, and reserving space for the wire changing hole 30 to be prepared later.

[0059] The arrangement of the first wire changing segment 21 beyond the second wire changing segment 22 provides a length allowance of the first wire changing segment 21 relative to the second wire changing segment 22 at the side where the first wire changing segment 21 and the second wire changing segment 22 need to overlap to achieve connection.

[0060] The arrangement of the first wire changing segment 21 beyond the second wire changing segment 22 first ensures that the entire projection area of the second wire changing segment 22 in the length direction is contained within the range of the first wire changing segment 21, thereby establishing a physical basis for the alignment between the first wire changing segment 21 and the second wire changing segment 22 in the projection relationship, which is equivalent to pre-constructing a buffer area for possible positional deviation in the length direction, so that even if the position of the second wire changing segment 22 deviates in the length direction during preparation, effective overlap with the first wire changing segment 21 can still be maintained.

[0061] Further, the arrangement of the first wire changing segment 21 beyond the second wire changing segment 22 reserves more abundant and stable process space for the wire changing hole 30 connecting the first wire changing segment 21 and the second wire changing segment 22. Since the first wire changing segment 21 extends outward at the end, both the first wire changing segment 21 and the second wire changing segment 22 can provide a metal base for the positioning and shaping of the wire changing hole 30, so that even if the hole position deviates slightly due to process fluctuations, it can always fall within the effective metal area of the first wire changing segment 21, thereby ensuring that the wire changing hole 30 can be completely prepared and have sufficient metal edge.

[0062] Please continue to refer to Figures 1 to 3 In some embodiments, the width dimension of the second detection trace portion 202 is smaller than that of the first detection trace portion 201, and the orthographic projection of the second detection trace portion 202 on the substrate 10 is located within the first detection trace portion 201.

[0063] In these embodiments, the second detection trace portion 202 is further defined as having a width direction orthogonal projection size completely falling within the first detection trace portion 201, thereby further ensuring that the second detection trace portion 202 has a width direction orthogonal projection falling within the first detection trace portion 201, and further reserving sufficient process space for the preparation of the wire changing hole 30.

[0064] Please continue to refer to Figures 1 to 3 In some embodiments, the detection signal line 20 further includes a first connecting portion 205 located on the side of the second detection trace portion 202 away from the substrate 10, and the wire changing hole 30 includes a first wire changing sub-hole 301 and a second wire changing sub-hole 302, the first connecting portion 205 is electrically connected to the first wire changing segment 21 through the first wire changing sub-hole 301 and is electrically connected to the second wire changing segment 22 through the second wire changing sub-hole 302.

[0065] In these embodiments, the first connecting portion 205 serves as a conductive bridge between other film layers, and establishes electrical connection with the first wire changing segment 21 in the first detection trace portion 201 through the first wire changing hole 30, and establishes electrical connection with the second wire changing segment 22 in the second detection trace portion 202 through the second wire changing hole 30.

[0066] The first wire changing segment 21 and the second wire changing segment 22 are respectively connected to the first connecting portion 205 above through independent first wire changing sub-hole 301 and second wire changing sub-hole 302, the connection function part is transferred to the separate first connecting portion 205, and multiple wire changing holes 30 are provided, that is, the first wire changing sub-hole 301 and the second wire changing sub-hole 302 are connected by separate points, which can effectively disperse the alignment and hole forming pressure of a single connection point, and reduce the risk of open circuit of the entire circuit caused by poor preparation of a single specific hole.

[0067] The existence of the first connecting portion 205 provides greater design flexibility and fault tolerance space for the positioning of the wire changing hole 30, and the overlapping arrangement of the first detection trace portion 201 and the second detection trace portion 202 can achieve direct lapping of the first wire changing segment 21 of the first detection trace portion 201 and the second wire changing segment 22 of the second detection trace portion 202 even if there is lapping error in the first wire changing sub-hole 301 and the second wire changing sub-hole 302 lapped by the first connecting portion 205.

[0068] For example, the first wire changing segment 21 and the second wire changing segment 22 should be understood as the first wire changing segment 21 including at least a part of the first detection trace portion 201 that overlaps with the first connecting portion 205 to form the first wire changing sub-hole 301 and the metal edge around the first wire changing sub-hole 301, and the second wire changing segment 22 including at least a part of the second detection trace portion 202 that overlaps with the first connecting portion 205 to form the second wire changing sub-hole 302 and the metal edge around the second wire changing sub-hole 302.

[0069] Please continue to refer toFigures 1 to 3 In some embodiments, the first connecting portion 205 at least partially overlaps with the first wire changing segment 21, and the first connecting portion 205 at least partially overlaps with the second wire changing segment 22, and the width dimension of the first connecting portion 205 is smaller than the width dimension of the first wire changing segment 21 and the width dimension of the second wire changing segment 22.

[0070] In these embodiments, the width dimension of the first connecting portion 205 is limited to be smaller than the width dimension of the first wire changing segment 21 and the second wire changing segment 22, which further reduces the fluctuation of the overlapping area of the first connecting portion 205 with the first wire changing segment 21 and the second wire changing segment 22 caused by the alignment process error, and effectively prepares the first wire changing sub-hole 301 and the second wire changing sub-hole 302, further ensuring the firmness and the conductive reliability of the series connection between the first detection wire portion 201 and the second detection wire portion 202.

[0071] Figure 4 An enlarged structure of the C region in FIG. 8 is shown, Figure 1 An enlarged structure of the C region in FIG. 8 is shown, Figure 5 An enlarged structure of the C region in FIG. 8 is shown, Figure 4 An enlarged structure of the C region in FIG. 8 is shown.

[0072] Please refer to Figure 1 , Figure 4 and Figure 5 In some embodiments, the detection signal line 20 further comprises a third detection wire portion 203 located on the side of the second detection wire portion 202 away from the substrate 10, the third detection wire portion 203 comprises a third wire changing segment 23, the orthographic projection of the third detection wire portion 203 and the second detection wire portion 202 in the thickness direction at least partially overlaps and is electrically connected to each other, and the width dimension of at least the third wire changing segment 23 is smaller than the width dimension of the second wire changing segment 22.

[0073] The second detection wire portion 202 comprises a first end 202a and a second end 202b arranged oppositely, and the detection signal line 20 further comprises a second connecting portion 206 located on the side of the third detection wire portion 203 away from the substrate 10, the second connecting portion 206 electrically connects the second wire changing segment 22 and the third wire changing segment 23 at the second end 202b of the second detection wire portion 202, and the first connecting portion 205 electrically connects the first wire changing segment 21 and another second wire changing segment 22 at the first end 202a of the second detection wire portion 202.

[0074] In the embodiments, the third detection trace portion 203 is connected to the second end 202b of the second detection trace portion 202 through the second connecting portion 206, and the first detection trace portion 201 is connected to the first end 202a of the second detection trace portion 202 through the first connecting portion 205, so that the third detection trace portion 303, the second connecting portion 206, the second detection trace portion 302, the first connecting portion 205, and the first detection trace portion 301 are connected end to end, the length of the detection signal line 20 is further lengthened to meet the resistance requirement, the width of the third wire-changing segment 23 of the third detection trace portion 203 is further smaller than the second wire-changing segment 22 of the second detection trace portion 202, the fluctuation of the overlapping area of the second connecting portion 206 and the second wire-changing segment 22 and the third wire-changing segment 23 caused by the alignment process error is further eliminated, the third wire-changing sub-hole 303 can be effectively prepared, and the firmness and the conductive reliability of the series connection between the second detection trace portion 202 and the third detection trace portion 203 are further ensured.

[0075] Optionally, when the overlapping relationship between the second connecting portion 206 and the third wire-changing sub-hole 303 is invalid, the second wire-changing segment 22 of the second detection trace portion 202 and the third wire-changing segment 23 of the third detection trace portion 203 can also directly overlap, so as to further ensure the firmness and the conductive reliability of the series connection between the second detection trace portion 202 and the third detection trace portion 203.

[0076] Exemplarily, the second wire-changing segment 22 and the third wire-changing segment 23 should be understood as follows: the third wire-changing segment 23 at least includes a part of the third detection trace portion 203 that overlaps with the second connecting portion 206 to form the third wire-changing sub-hole 303 and the metal edge around the third wire-changing sub-hole 303; and the second wire-changing segment 22 at least includes a part of the second detection trace portion 202 that overlaps with the second connecting portion 206 to form the third wire-changing sub-hole 303 and the metal edge around the third wire-changing sub-hole 303.

[0077] Exemplarily, Figure 1 Only one implementation of the positions of the second wire-changing segment 22 and the third wire-changing segment 23 is shown in the drawings, and the arrangement of the second detection trace portion 202 and the third detection trace portion 203 around the full screen can maximize the resistance of the detection signal line. Those skilled in the art can flexibly adjust the positions of the second wire-changing segment 22 and the third wire-changing segment 23 according to the actual design resistance requirement, the winding mode, and the opening and positioning specification, and the first aspect of the present application is not limited to the positions of the second wire-changing segment 22 and the third wire-changing segment 23 shown in the drawings. Figure 1 The positions of the second wire-changing segment 22 and the third wire-changing segment 23 shown in the drawings.

[0078] Please continue to refer to Figures 4 to 5In some embodiments, the second connecting portion 206 at least partially overlaps with the second wire-changing segment 22, and the second connecting portion 206 at least partially overlaps with the third wire-changing segment 23, and the width dimension of the second connecting portion 206 is smaller than the width dimension of the second wire-changing segment 22 and the width dimension of the third wire-changing segment 23.

[0079] In these embodiments, the width dimension of the second connecting portion 206 is further smaller than the second wire-changing segment 22 of the second detection wire portion 202 and the third wire-changing segment 23 of the third detection wire portion 203, further eliminating the fluctuation of the overlapping area of the second connecting portion 206 with the second wire-changing segment 22 and the third wire-changing segment 23 caused by the alignment process error, effectively preparing the third wire-changing sub-hole 303, and further ensuring the firmness and conductive reliability of the series connection between the second connecting portion 206 and the second wire-changing segment 22 and the third wire-changing segment 23.

[0080] Figure 6 Another enlarged structure of the C region in FIG. Figure 1 Another cross-sectional structure along the D-D direction in FIG. Figure 7 Another enlarged structure of the C region in FIG. Figure 6 Another cross-sectional structure along the D-D direction in FIG.

[0081] Please refer to Figures 6 to 7 In some embodiments, the detection signal line 20 further comprises a third detection wire portion 203 located on the side of the second detection wire portion 202 away from the substrate 10, the third detection wire portion 203 comprises a third wire-changing segment 23, the wire-changing hole 30 further comprises a third wire-changing sub-hole 303, the orthographic projection of the third detection wire portion 203 and the second detection wire portion 202 in the thickness direction at least partially overlaps, and the second wire-changing segment 22 and the third wire-changing segment 23 are electrically connected through the third wire-changing sub-hole 303, and at least the width dimension of the third wire-changing segment 23 is smaller than the width dimension of the second wire-changing segment 22.

[0082] In these embodiments, the third detection wire portion 203 is connected with the second end 202b of the second detection wire portion 202, and the first detection wire portion 201 is connected with the first end 202a of the second detection wire portion 202 through the first connecting portion 205, realizing the head-to-tail connection of the third detection wire portion 203, the second detection wire portion 301, the first connecting portion 205 and the first detection wire portion 301, further extending the length of the detection signal line 20 to meet the resistance value requirement, at the same time, the width dimension of the third wire-changing segment 23 of the third detection wire portion 203 is further smaller than the second wire-changing segment 22 of the second detection wire portion 202, further eliminating the fluctuation of the overlapping area of the second wire-changing segment 22 and the third wire-changing segment 23 caused by the alignment process error, effectively preparing the third wire-changing sub-hole 303, and further ensuring the firmness and conductive reliability of the series connection between the second detection wire portion 202 and the third detection wire portion 203.

[0083] Exemplarily, the second wire-changing segment 22 and the third wire-changing segment 23 should be understood as that the third wire-changing segment 23 at least includes a portion of the third detection trace part 203 which is required for forming the third wire-changing sub-hole 303 and the metal edge around the third wire-changing sub-hole 303 by overlapping with the second wire-changing segment 22, and the second wire-changing segment 22 at least includes a portion of the second detection trace part 202 which is required for forming the third wire-changing sub-hole 303 and the metal edge around the third wire-changing sub-hole 303 by overlapping with the third wire-changing segment 23.

[0084] Exemplarily, the second wire-changing segment 22 of the second detection trace part 202 and the third wire-changing segment 23 of the third detection trace part 203 are directly connected through the third wire-changing sub-hole 303.

[0085] Please continue to refer to Figures 6 to 7 In some embodiments, the length dimension of the third detection trace part 203 does not exceed the length dimension of the second detection trace part 202, and the width dimension of the third detection trace part 203 does not exceed the width dimension of the second detection trace part 202.

[0086] In these embodiments, the length dimension and the width dimension of the third detection trace part 203 are both limited to be smaller than the second detection trace part 202, which further facilitates the alignment in the process of trace preparation, reduces the alignment error, ensures the overlapping area of the second wire-changing segment 22 of the second detection trace part 202 and the third wire-changing segment 23 of the third detection trace part 203, and can effectively prepare the wire-changing hole 30, further ensuring the firmness and the conductive reliability of the series connection between the second detection trace part 202 and the third detection trace part 203.

[0087] The design of limiting the width dimension and the length dimension of the third detection trace part 203 means that the third detection trace part 203 is contained or aligned by the second detection trace part 202 in the overall size, thereby providing a more relaxed alignment tolerance in the preparation process.

[0088] When the third detection trace part 203 does not exceed the range of the second detection trace part 202 in both length and width dimensions, even if a certain interlayer offset is generated in manufacturing, the second detection trace part 202 can always provide sufficient and stable support substrate for the third detection trace part 203, ensuring that the two maintain sufficient overlapping area at the preset connection position, not only reducing the process complexity, but also reducing the risk of connection failure caused by alignment error.

[0089] Specifically, the second detection trace part 202 serves as a lower structure, and its larger size provides a reliable reference boundary for positioning of the upper third detection trace part 203; and the third detection trace part 203 is arranged within the range of the second detection trace, and when the wire changing hole 30 is formed, the hole position can always fall within the effective area of the second detection trace part 202, thereby ensuring that the third wire changing sub-hole 303 has a metal edge with sufficient size around it, avoiding hole defects or loose connections caused by alignment deviation.

[0090] Please refer to Figure 1 In some embodiments, the length of the third detection trace part 203 is smaller than the length of the second detection trace part 202, the width of the third detection trace part 203 is smaller than the width of the second detection trace part 202, and the orthographic projection of the third detection trace part 203 on the substrate 10 is within the second detection trace part 202.

[0091] The second detection trace part includes a first end 202a and a second end 202b arranged oppositely, and the first wire changing segment 21 of the first detection trace part 201 is arranged beyond the second wire changing segment 22 of the second detection trace part 202 at the first end 202a, and the other second wire changing segment 22 of the second detection trace is arranged beyond the third wire changing segment 23 of the third detection trace part 203 at the second end 202b.

[0092] In these embodiments, the first wire changing segment 21 overlaps the second wire changing segment 22 of the second detection trace part 202 at the first end 202a, and the third wire changing segment 23 overlaps the second wire changing segment 22 of the second detection trace part 202 at the second end 202b, and the first detection trace part 201, the second detection trace part 202 and the third detection trace part 203 are connected end to end, meeting the resistance requirement while further eliminating the fluctuation of the overlapping area of the second wire changing segment 22 with the first wire changing segment 21 and the third wire changing segment 23 caused by process alignment error.

[0093] On the side where the first wire changing segment 21 overlaps the second wire changing segment 22, the first wire changing segment 21 is arranged beyond the second wire changing segment 22, ensuring that the orthographic projection size of the second wire changing segment 22 in the length direction completely falls within the first wire changing segment 21, and reserving space for the intermediate bridge connection structure and the wire changing hole 30 prepared subsequently.

[0094] The arrangement of the first wire changing segment 21 beyond the second wire changing segment 22 has a length margin of the first wire changing segment 21 relative to the second wire changing segment 22 on the side where the first wire changing segment 21 and the second wire changing segment 22 need to overlap to achieve connection.

[0095] The second wire changing section 22 is arranged beyond the third wire changing section 23 at a side where the second wire changing section 22 and the third wire changing section 23 overlap each other, so as to ensure that the lengthwise projection size of the third wire changing section 23 falls completely within the second wire changing section 22 and to reserve space for the intermediate bridge connection structure and the wire changing hole 30 to be prepared subsequently.

[0096] The second wire changing section 22 is arranged beyond the third wire changing section 23 at a side where the second wire changing section 22 and the third wire changing section 23 overlap each other, so as to ensure that the lengthwise projection size of the third wire changing section 23 falls completely within the second wire changing section 22 and to reserve space for the intermediate bridge connection structure and the wire changing hole 30 to be prepared subsequently.

[0097] Further, the arrangement of the second wire changing section 22 beyond the third wire changing section 23 reserves more abundant and stable process space for the third wire changing sub-hole 303 connecting the second wire changing section 22 and the third wire changing section 23. Since the second wire changing section 22 extends outward at the end portion, both the second wire changing section 22 and the third wire changing section 23 can provide a metal base for positioning and forming of the third wire changing sub-hole 303, so that even if the hole position is slightly offset due to process fluctuation, it can always fall within the effective metal area of the second wire changing section 22, thereby ensuring that the third wire changing sub-hole 303 can be completely prepared and has sufficient metal edge.

[0098] Further, the arrangement of the second wire changing section 22 beyond the third wire changing section 23 reserves more abundant and stable process space for the third wire changing sub-hole 303 connecting the second wire changing section 22 and the third wire changing section 23. Since the second wire changing section 22 extends outward at the end portion, both the second wire changing section 22 and the third wire changing section 23 can provide a metal base for positioning and forming of the third wire changing sub-hole 303, so that even if the hole position is slightly offset due to process fluctuation, it can always fall within the effective metal area of the second wire changing section 22, thereby ensuring that the third wire changing sub-hole 303 can be completely prepared and has sufficient metal edge.

[0099] Figure 8 Fig. 1 shows a plan structure of another display panel provided by an embodiment of the first aspect of the present application, Figure 9 Fig. 1 shows a plan structure of another display panel provided by an embodiment of the first aspect of the present application.

[0100] Please refer to Figure 8 and Figure 9 In some embodiments, the non-display area NA further includes a first sub-area NA1 and a second sub-area NA2 which partially surround the display area AA, and the first detection wire section 201 and the second detection wire section 202 each include a first sub-section 20a and a second sub-section 20b, the first sub-section 20a is located in the first sub-area NA1, and the second sub-section 20b is located in the second sub-area NA2.

[0101] The first sub-section 20a of the first detection wiring part 201 and the first sub-section of the second detection wiring part 202 at least partially overlap, and the width dimension of the first sub-section 20a of the second detection wiring part 202 is smaller than the width dimension of the first sub-section 20a of the first detection wiring part 201. The second sub-section 20b of the first detection wiring part 201 and the second sub-section of the second detection wiring part 202 at least partially overlap, and the width dimension of the second sub-section 20b of the second detection wiring part 202 is smaller than the width dimension of the second sub-section 20b of the first detection wiring part 201.

[0102] In these embodiments, the first detection wiring part 201 and the second detection wiring part 202 are divided into the first sub-section 20a located in the first sub-area NA1 and the second sub-section 20b located in the second sub-area NA2, and the width dimension of the second detection wiring part 202 is still smaller than the width dimension of the first detection wiring part 201, so as to realize the reduction of the alignment error in the first sub-area NA1 and the second sub-area NA2, ensure the overlapping area of the first line-changing section 21 of the first detection wiring part 201 and the second line-changing section 22 of the second detection wiring part 202, effectively prepare the line-changing hole, and further guarantee the firmness and the conductive reliability of the series connection between the first detection wiring part 201 and the second detection wiring part 202.

[0103] For example, the first sub-area NA1 is the left half non-display area, and the second sub-area NA2 is the right half non-display area.

[0104] Optionally, the first sub-section 20a located in the first sub-area NA1 and the second sub-section 20b located in the second sub-area NA2 are respectively formed into independent crack detection circuits winding around half screen, for detecting the crack condition of the first sub-area NA1 and the second sub-area NA2 respectively.

[0105] Optionally, the first sub-section 20a located in the first sub-area NA1 and the second sub-section 20b located in the second sub-area NA2 are connected through a connecting structure to form a complete crack detection circuit winding around the full screen, for detecting the crack condition of the whole non-display area NA.

[0106] Figure 10 An enlarged structure of the E area in FIG. Figure 1 A cross-sectional structure along F-F in FIG. Figure 11 is Figure 10 A cross-sectional structure along F-F in FIG.

[0107] Please refer to Figures 10 to 11In some embodiments, the detection trace further comprises a fourth detection trace portion 204 located on the side of the third detection trace portion 203 away from the substrate 10, the fourth detection trace portion 204 comprises a fourth jumper segment 24, the jumper hole 30 further comprises a fourth jumper sub-hole 304, the fourth detection trace portion 204 and the third detection trace portion 203 at least partially overlap in the thickness direction, and the third jumper segment 23 and the fourth jumper segment 24 are electrically connected through the fourth jumper sub-hole 304. The width dimension of at least the fourth jumper segment 24 is smaller than the width dimension of the third jumper segment 23.

[0108] Please refer to Figures 8 to 9 For example, in these embodiments, the detection signal lines 20 of the first sub-area NA1 and the second sub-area NA2 are connected or led out through the fourth detection trace portion 204, further capable of realizing the wiring mode around the full screen and around the half screen at the same time, and the width dimension of the fourth jumper segment 24 of the fourth detection trace portion 204 is further smaller than the third jumper segment 23 of the third detection trace portion 203, further eliminating the fluctuation of the overlapping area of the third jumper segment 23 and the fourth jumper segment 24 caused by the alignment process error, effectively preparing the fourth jumper sub-hole 304, and further ensuring the firmness and conductive reliability of the series connection between the third detection trace portion 203 and the fourth detection trace portion 204.

[0109] The specific schemes of the arrangement of the fourth detection trace portion 204 to realize the wiring mode around the full screen and around the half screen respectively will be further described in other embodiments of the first aspect of the present application.

[0110] For example, the third jumper segment 23 and the fourth jumper segment 24 should be understood as that the third jumper segment 23 at least comprises the part of the third detection trace portion 203 required for the metal edge around the fourth jumper sub-hole 304 and the fourth jumper segment 24 at least comprises the part of the fourth detection trace portion 204 required for the metal edge around the fourth jumper sub-hole 304.

[0111] For example, Figure 1 In the third jumper segment 23 and the fourth jumper segment 24, only one embodiment of the location of the third jumper segment 23 and the fourth jumper segment 24 is shown, and the arrangement of the third detection trace portion 203 and the fourth detection trace portion 204 around the full screen can maximize the resistance value of the detection signal line. Those skilled in the art can flexibly adjust the location of the third jumper segment 23 and the fourth jumper segment 24 according to the actual design resistance value, the wiring mode and the opening hole specification, and the first aspect of the present application is not limited to the location of the third jumper segment 23 and the fourth jumper segment 24 shown in the third jumper segment 23 and the fourth jumper segment 24. Figure 1 In the third jumper segment 23 and the fourth jumper segment 24, only one embodiment of the location of the third jumper segment 23 and the fourth jumper segment 24 is shown, and the arrangement of the third detection trace portion 203 and the fourth detection trace portion 204 around the full screen can maximize the resistance value of the detection signal line. Those skilled in the art can flexibly adjust the location of the third jumper segment 23 and the fourth jumper segment 24 according to the actual design resistance value, the wiring mode and the opening hole specification, and the first aspect of the present application is not limited to the location of the third jumper segment 23 and the fourth jumper segment 24 shown in the third jumper segment 23 and the fourth jumper segment 24.

[0112] Please continue to refer to Figure 8And Figure 9 In some embodiments, the fourth detection trace portion 204 is electrically connected to the first sub-section 20a and the second sub-section 20b of the third detection trace portion 203, or the fourth detection trace portion 204 further comprises the first sub-section 20a and the second sub-section 20b, the first sub-section 20a of the fourth detection trace portion 204 is electrically connected to the first sub-section 20a of the third detection trace portion 203, and the second sub-section 20b of the fourth detection trace portion 204 is electrically connected to the second sub-section 20b of the third detection trace portion 203.

[0113] In these embodiments, the fourth detection trace portion 204 can be electrically connected to the first sub-section 20a and the second sub-section 20b of the third detection trace portion 203 to achieve a wiring scheme around the full screen, or can be divided into the first sub-section 20a and the first sub-section of the third detection trace portion 203, and the second sub-section 20b and the second sub-section of the third detection trace portion 203.

[0114] Referring to Figure 8 In the wiring scheme around the full screen, the fourth detection trace portion 204 serves as a whole conductive bridge and is electrically connected to the first sub-section 20a and the second sub-section 20b of the third detection trace portion 203, so as to integrate the two physically separated detection paths into a ring-shaped loop circuit around the whole screen, thereby achieving more comprehensive crack detection coverage of the panel.

[0115] Referring to Figure 9 In another wiring scheme around the half screen, the fourth detection trace portion 204 itself also comprises the first sub-section 20a and the second sub-section 20b which are electrically isolated from each other, and the first sub-section is specially connected to the first sub-section 20a of the third detection trace portion 203, and the second sub-section 20b is specially connected to the second sub-section 20b of the third detection trace portion 203, so as to lead out the detection signal line 20 of the first sub-area NA1 and the detection signal line of the second sub-area NA2, respectively.

[0116] Figure 8 And Figure 9 The wiring scheme of the display panel 100 provided in the embodiments of the first aspect of the present application is only one of the implementation manners, and the wiring manner of the detection signal line 20 in the display panel 100 provided in the embodiments of the present application can also be other wiring manners according to actual resistance value requirements and wiring space and other requirements, and the embodiments of the present application are not limited to Figure 8 And Figure 9 the wiring manner.

[0117] FIG. 12 is a step flowchart of another crack detection method of a display panel provided in the embodiments of the second aspect of the present application.

[0118] Referring to Figure 12In a second aspect, the embodiments of the present application provide a crack detection method of a display panel. The display panel includes a display area and a non-display area surrounding the display area at least partially, and further includes a substrate and a detection signal line. The detection signal line is located on one side of the substrate and in the non-display area. The detection signal line includes a first detection trace portion and a second detection trace portion stacked along the thickness direction of the substrate. The second detection trace portion is located on the side of the first detection trace portion away from the substrate. The display panel further includes a wire changing hole. The first detection trace portion includes a first wire changing segment, and the second detection trace portion includes a second wire changing segment. The orthographic projection of the first detection trace portion, the wire changing hole and the second detection trace portion in the thickness direction at least partially overlaps, and the first wire changing segment and the second wire changing segment are electrically connected through the wire changing hole. The width dimension of at least the second wire changing segment is smaller than the width dimension of the first wire changing segment. The crack detection method includes the following steps: In step S10, an input signal is provided to the first detection trace portion and / or the second detection trace portion, and a crack detection signal is acquired from the first detection trace portion and / or the second detection trace portion. In step S20, whether the display panel has a crack is determined according to the crack detection signal.

[0119] The crack detection method of the display panel provided by the second aspect of the embodiments of the present application has the beneficial effects of the display panel provided by any of the first aspects of the embodiments of the present application.

[0120] In the step S10, the input signal is provided to the first detection trace portion and / or the second detection trace portion, and the crack detection signal is acquired. Thanks to the stacking structure and the line width limitation design of the display panel provided by any of the first aspects of the embodiments of the present application, the detection signal line itself has connection reliability and process stability.

[0121] The compact layout of the multi-layer trace of the detection signal line in the vertical direction ensures that the detection circuit has sufficient physical length in the limited frame to meet the resistance detection requirement, and the line width gradient and the projection overlapping relationship guarantee the firmness and the conductive continuity of the electrical connection at the wire changing hole.

[0122] In the step S20, whether the display panel has a crack is determined according to the reliable crack detection signal. The confidence of the detection result is improved.

[0123] Figure 13 It is the overall structure of a display device provided by the third aspect of the embodiments of the present application.

[0124] Please refer to Figure 13 In a third aspect, the embodiments of the present application provide a display device 200. The display device 200 includes the display panel 100 provided by any of the first aspects of the embodiments of the present application.

[0125] The display device 200 provided in the third aspect of the present application comprises the display panel 100 provided in any one of the first aspects of the present application, and thus has the beneficial effects of the display panel 100 provided in any one of the first aspects of the present application, which will not be repeated here.

[0126] The display device 200 in the embodiments of the present application includes, but is not limited to, a mobile phone, a personal digital assistant (PDA), a tablet computer, an electronic book, a television, a door access control, a smart fixed telephone, a control console, and the like.

[0127] The display device 200 can be any device having a display function, for example, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a wearable device, an ultra mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), and the like. The display device 200 can also be a personal computer (PC), a television (TV), a teller machine, a self-service machine, and the like.

[0128] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to the present application without departing from the scope of the present application, and equivalent substitutions can be made to the components thereof. In particular, the technical features mentioned in each of the embodiments can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0129] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to the present application without departing from the scope of the present application, and equivalent substitutions can be made to the components thereof. In particular, the technical features mentioned in each of the embodiments can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that, The display panel includes a display area and a non-display area at least partially surrounding the display area, and the display panel further includes: Substrate; A detection signal line is located on one side of the substrate and in the non-display area. The detection signal line includes a first detection trace and a second detection trace stacked along the thickness direction of the substrate. The second detection trace is located on the side of the first detection trace facing away from the substrate. The display panel also includes a line-changing hole. The first detection trace includes a first line-changing segment, and the second detection trace includes a second line-changing segment. The first detection trace and the second detection trace at least partially overlap in their orthogonal projections onto the substrate along the thickness direction, and the first line-changing segment and the second line-changing segment are electrically connected through the line-changing hole. At least the width of the second line-changing segment is smaller than the width of the first line-changing segment.

2. The display panel according to claim 1, characterized in that, The length of the second detection trace does not exceed the length of the first detection trace, and the width of the second detection trace does not exceed the width of the first detection trace.

3. The display panel according to claim 2, characterized in that, The first line-changing segment, the line-changing hole, and the second line-changing segment at least partially overlap in their orthogonal projections onto the substrate along the thickness direction.

4. The display panel according to claim 3, characterized in that, The length of the second detection trace is less than the length of the first detection trace. The first line-changing segment is located at at least one end of the first detection trace, and the second line-changing segment is located at at least one end of the second detection trace. The first line-changing segment extends beyond the second line-changing segment.

5. The display panel according to claim 4, characterized in that, The width of the second detection trace is smaller than the width of the first detection trace, and the orthographic projection of the second detection trace onto the substrate is located within the first detection trace.

6. The display panel according to claim 5, characterized in that, The detection signal line further includes a first connection portion located on the side of the second detection trace portion away from the substrate. The line-changing hole includes a first line-changing sub-hole and a second line-changing sub-hole. The first connection portion is electrically connected to the first line-changing segment through the first line-changing sub-hole and to the second line-changing segment through the second line-changing sub-hole.

7. The display panel according to claim 6, characterized in that, The first connecting portion overlaps at least partially with the first switching segment, and the first connecting portion overlaps at least partially with the second switching segment. The width of the first connecting portion is smaller than the width of the first switching segment and the width of the second switching segment.

8. The display panel according to claim 7, characterized in that, The detection signal line also includes a third detection trace located on the side of the second detection trace away from the substrate. The third detection trace includes a third switching segment. The third detection trace and the second detection trace have at least partially overlapped in the orthographic projection in the thickness direction and are electrically connected to each other. At least the width of the third switching segment is smaller than the width of the second switching segment. The second detection trace includes a first end and a second end disposed opposite to each other. The detection signal line also includes a second connection portion located on the side of the third detection trace away from the substrate. The second connection portion is electrically connected to the second switching segment and the third switching segment at the second end of the second detection trace. The first connection portion is electrically connected to the first switching segment and another second switching segment at the first end of the second detection trace.

9. The display panel according to claim 8, characterized in that, The second connecting portion overlaps at least partially with the second switching segment, and the second connecting portion overlaps at least partially with the third switching segment. The width of the second connecting portion is smaller than the width of the second switching segment and the width of the third switching segment.

10. The display panel according to claim 7, characterized in that, The detection signal line further includes a third detection trace located on the side of the second detection trace away from the substrate. The third detection trace includes a third line-changing segment, and the line-changing hole further includes a third line-changing sub-hole. The orthographic projections of the third detection trace and the second detection trace in the thickness direction at least partially overlap, and the second line-changing segment and the third line-changing segment are electrically connected through the third line-changing sub-hole. At least the width of the third line-changing segment is smaller than the width of the second line-changing segment.

11. The display panel according to claim 10, characterized in that, The length of the third detection trace does not exceed the length of the second detection trace, and the width of the third detection trace does not exceed the width of the second detection trace.

12. The display panel according to claim 11, characterized in that, The length of the third detection trace is smaller than the length of the second detection trace, the width of the third detection trace is smaller than the width of the second detection trace, and the orthographic projection of the third detection trace on the substrate is located within the second detection trace. The second detection routing section includes a first end and a second end that are disposed opposite to each other. The first switching segment of the first detection routing section extends beyond the second switching segment of the second detection routing section at the first end. The other second switching segment of the second detection routing section extends beyond the third switching segment of the third detection routing section at the second end.

13. The display panel according to claim 9 or 12, characterized in that, The non-display area also includes a first sub-area and a second sub-area surrounding the display area. Both the first detection trace and the second detection trace include a first segment and a second segment, with the first segment located in the first sub-area and the second segment located in the second sub-area. The first sub-segment of the first detection trace and the first sub-segment of the second detection trace at least partially overlap, and the width of the first sub-segment of the second detection trace is smaller than the width of the first sub-segment of the first detection trace. The second sub-segment of the first detection trace and the second sub-segment of the second detection trace at least partially overlap, and the width of the second sub-segment of the second detection trace is smaller than the width of the second sub-segment of the first detection trace.

14. The display panel according to claim 13, characterized in that, The detection trace further includes a fourth detection trace located on the side of the third detection trace away from the substrate. The fourth detection trace includes a fourth line-changing segment, and the line-changing hole further includes a fourth line-changing sub-hole. The orthographic projections of the fourth detection trace and the third detection trace in the thickness direction at least partially overlap, and the third line-changing segment and the fourth line-changing segment are electrically connected through the fourth line-changing sub-hole. At least the width of the fourth line-changing segment is smaller than the width of the third line-changing segment.

15. The display panel according to claim 14, characterized in that, The fourth detection wiring section is electrically connected to the first sub-segment and the second sub-segment of the third detection wiring section, or, The fourth detection routing section further includes a first sub-segment and a second sub-segment. The first sub-segment of the fourth detection routing section is electrically connected to the first sub-segment of the third detection routing section, and the second sub-segment of the fourth detection routing section is electrically connected to the second sub-segment of the third detection routing section.

16. A method for detecting cracks in a display panel, characterized in that, The display panel includes a display area and a non-display area at least partially surrounding the display area. The display panel also includes a substrate and detection signal lines. The detection signal lines are located on one side of the substrate and within the non-display area. The detection signal lines include a first detection trace and a second detection trace stacked along the thickness direction of the substrate. The second detection trace is located on the side of the first detection trace facing away from the substrate. The display panel also includes a line-changing hole. The first detection trace includes a first line-changing segment, and the second detection trace includes a second line-changing segment. The first detection trace, the line-changing hole, and the second detection trace at least partially overlap in their orthographic projections along the thickness direction, and the first line-changing segment and the second line-changing segment are electrically connected through the line-changing hole. At least the width of the second line-changing segment is smaller than the width of the first line-changing segment. The crack detection method includes: An input signal is provided to the first detection wiring section and / or the second detection wiring section, and a crack detection signal is obtained from the first detection wiring section and / or the second detection wiring section; The presence of cracks in the display panel is determined based on the crack detection signal.

17. A display device, characterized in that, The display panel includes any one of claims 1 to 16.

Images