Display panel, testing method thereof, and display device

Abstract

Embodiments of the present invention disclose a display panel, a test method thereof, and a display device. The display panel includes at least one crack detection line group located in a frame area. Each crack detection line group includes a first crack detection line and a second crack detection line. The first crack detection line and the second crack detection line are both used to transmit test signals to detect cracks. The first crack detection line and the second crack detection line extend around the display area, and the second crack detection line is located outside the first crack detection line. The first crack detection line and the second crack detection line are short-circuited. The technical solution of the present invention can not only test whether a display panel has cracks, but also help alleviate the problem of electrostatic damage to the display panel, thereby improving product quality.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular to a display panel, a testing method thereof, and a display device. Background Art

[0002] With the continuous advancement of display technology, people's requirements for display panel quality are becoming increasingly higher. Existing display panels are often equipped with crack detection circuits based on panel crack detection (PCD) technology. These circuits are primarily used to detect cracks that may occur during cutting or transportation. Currently, the crack detection circuits in existing display panels are prone to electrostatic damage, resulting in poor display quality and affecting product quality. Summary of the Invention

[0003] Embodiments of the present invention provide a display panel, a testing method thereof, and a display device, which can test whether a display panel has cracks while alleviating the problem of electrostatic damage to the display panel, thereby improving the quality of display panel products.

[0004] In a first aspect, an embodiment of the present invention provides a display panel having a display area and a frame area, the display panel comprising:

[0005] At least one crack detection line group is located in the frame area, each of the crack detection line groups includes a first crack detection line and a second crack detection line, the first crack detection line and the second crack detection line are both used to transmit test signals to achieve crack detection, the first crack detection line and the second crack detection line both extend around the display area, the second crack detection line is located outside the first crack detection line, and the first crack detection line and the second crack detection line are short-circuited.

[0006] Optionally, the border area includes an upper border area, a lower border area, a left border area, and a right border area; the first crack detection line and the second crack detection line both extend from one side of the lower border area to the other side of the lower border area through the left border area, the upper border area, and the right border area in sequence; and the first crack detection line and the second crack detection line are short-circuited in any one of the upper border area, the lower border area, the left border area, and the right border area;

[0007] Preferably, the display panel further includes:

[0008] a plurality of sub-pixel units and a plurality of data lines, the sub-pixel units being connected to corresponding data lines, the first crack detection line and the second crack detection line being connected to corresponding data lines to transmit test signals to the sub-pixel units via the data lines and drive them to emit light, thereby realizing crack detection, and the first crack detection line and the second crack detection line corresponding to different data lines;

[0009] Preferably, the display panel further includes:

[0010] The first switch and the second switch are located in the border area. The first crack detection line is connected to the corresponding data line through the first switch. The first switch is used to control the connection or disconnection between the first crack detection line and the corresponding data line. The second crack detection line is connected to the corresponding data line through the second switch. The second switch is used to control the connection or disconnection between the second crack detection line and the corresponding data line.

[0011] Optionally, the first crack detection line includes a first shorting point, the second crack detection line includes a second shorting point, and the first crack detection line and the second crack detection line are short-circuited via the first shorting point and the second shorting point;

[0012] The first crack detection lines on both sides of the first shorting point are respectively used to connect to the corresponding data lines, and the first crack detection lines on both sides of the first shorting point correspond to different data lines;

[0013] The second crack detection lines on both sides of the second shorting point are respectively used to connect to the corresponding data lines, and the second crack detection lines on both sides of the second shorting point correspond to different data lines.

[0014] Optionally, the crack detection line group includes a first crack detection line group and a second crack detection line group, the first crack detection line and the second crack detection line in the first crack detection line group are located outside the first crack detection line and the second crack detection line in the second crack detection line group, and the first crack detection line group and the second crack detection line group are used to perform crack detection at different process stages of the display panel.

[0015] Optionally, the display panel further includes:

[0016] at least one test terminal located in the border area, the test terminal being connected to the first crack detection line in the first crack detection line group and configured to provide the test signal to the first crack detection line in the first crack detection line group, or the test terminal being connected to the second crack detection line in the first crack detection line group and configured to provide the test signal to the second crack detection line in the first crack detection line group;

[0017] at least one bonding connection portion, the border area including a driver chip bonding area, the bonding connection portion being located in the driver chip bonding area, the bonding connection portion being used to connect a signal terminal in the driver chip and the first crack detection line in the second crack detection line group to provide the received test signal to the first crack detection line in the second crack detection line group, or the bonding connection portion being used to connect a signal terminal in the driver chip and the second crack detection line in the second crack detection line group to provide the received test signal to the second crack detection line in the second crack detection line group;

[0018] Preferably, the test terminal includes a first test terminal and a second test terminal, the first test terminal is connected to the first crack detection line or the second crack detection line in the first crack detection line group on one side of the lower frame area, and the second test terminal is connected to the first crack detection line or the second crack detection line in the first crack detection line group on the other side of the lower frame area;

[0019] Preferably, the bonding connection portion includes a first bonding connection portion and a second bonding connection portion, the driver chip bonding area is located in the lower frame area, the first bonding connection portion is located on the side of the driver chip bonding area close to the left frame area, and the second bonding connection portion is located on the side of the driver chip bonding area close to the right frame area, and the first bonding connection portion and the second bonding connection portion are respectively connected to the first crack detection line or the second crack detection line in the second crack detection line group.

[0020] Optionally, the display panel further includes a third crack detection line, which extends around the display area and is located at the periphery of each crack detection line group. The third crack detection line is used to reflect whether a crack occurs in the display panel through its resistance value.

[0021] In a second aspect, an embodiment of the present invention provides a method for testing a display panel, wherein the display panel has a display area and a frame area, the display panel comprising: at least one crack detection line group located in the frame area, each crack detection line group comprising a first crack detection line and a second crack detection line, the first crack detection line and the second crack detection line both extending around the display area, the second crack detection line being located outside the first crack detection line, and the first crack detection line and the second crack detection line being short-circuited;

[0022] The display panel testing method includes:

[0023] providing a test signal to the first crack detection line or the second crack detection line;

[0024] Whether the display panel has a crack is tested according to whether the test signals on the first crack detection line and the second crack detection line can be transmitted normally.

[0025] Optionally, the display panel further includes: a plurality of sub-pixel units and a plurality of data lines, the sub-pixel units are connected to corresponding data lines, the first crack detection line and the second crack detection line are both used to connect to corresponding data lines, and the first crack detection line and the second crack detection line correspond to different data lines;

[0026] The step of testing whether a crack occurs on the display panel according to whether the test signals on the first crack detection line and the second crack detection line can be transmitted normally includes:

[0027] testing whether the display panel has cracks according to light emission conditions of the sub-pixel unit corresponding to the data line connected to the first crack detection line and the sub-pixel unit corresponding to the data line connected to the second crack detection line;

[0028] Preferably, the first crack detection line includes a first shorting point, and the second crack detection line includes a second shorting point, and the first crack detection line and the second crack detection line are short-circuited through the first shorting point and the second shorting point; the first crack detection lines on both sides of the first shorting point are respectively used to connect to the corresponding data lines, and the first crack detection lines on both sides of the first shorting point correspond to different data lines; the second crack detection lines on both sides of the second shorting point are respectively used to connect to the corresponding data lines, and the second crack detection lines on both sides of the second shorting point correspond to different data lines;

[0029] Providing a test signal to the first crack detection line or the second crack detection line includes:

[0030] A test signal is provided to the first crack detection line located at least on one side of the first shorting point; or a test signal is provided to the second crack detection line located at least on one side of the second shorting point.

[0031] Optionally, the crack detection line group includes a first crack detection line group and a second crack detection line group, and the first crack detection line and the second crack detection line in the first crack detection line group are located outside the first crack detection line and the second crack detection line in the second crack detection line group;

[0032] The process stages of the display panel include a screen process stage and a module process stage. The display panel testing method further includes:

[0033] In the screen body process stage, providing the test signal to the first crack detection line or the second crack detection line in the first crack detection line group, so as to test whether the display panel has cracks according to light emission conditions of sub-pixel units corresponding to the data lines connected to the first crack detection lines and sub-pixel units corresponding to the data lines connected to the second crack detection lines in the first crack detection line group;

[0034] During the module process stage, the test signal is provided to the first crack detection line or the second crack detection line in the second crack detection line group to test whether cracks appear on the display panel based on the luminescence conditions of the sub-pixel unit corresponding to the data line connected to the first crack detection line in the second crack detection line group and the sub-pixel unit corresponding to the data line connected to the second crack detection line.

[0035] In a third aspect, an embodiment of the present invention provides a display device, comprising the display panel described in the first aspect.

[0036] Embodiments of the present invention provide a display panel, a test method thereof, and a display device. Each crack detection line group includes a first crack detection line and a second crack detection line. The first crack detection line and the second crack detection line are connected to corresponding data lines, transmitting test signals to sub-pixel units via the data lines and driving them to emit light. The display panel is tested for cracks based on the light emission of the sub-pixel units corresponding to the data lines connected to the first and second crack detection lines. Furthermore, by configuring the first and second crack detection lines to extend around the display area, with the second crack detection line located outside the first crack detection line, and short-circuiting the first and second crack detection lines, the short-circuit between the first and second crack detection lines can be located in the area between the two lines. Compared to the prior art, this eliminates the need for electrical connection between the first and second crack detection lines through line replacement, helping to avoid corners in the area where the first and second crack detection lines are electrically connected. This avoids electrostatic damage caused by adjacent corners of crack detection lines in the display panel, thereby improving the quality of display panel products. In addition, this solution alleviates the problem of electrostatic damage by improving the layout and electrical connection of the crack detection line, and can also avoid additional production processes and production costs of the display panel.

[0037] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 This is a schematic structural diagram of a display panel in the related art;

[0040] Figure 2 yes Figure 1 An enlarged view of the first region 107 in FIG.

[0041] Figure 3 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0042] Figure 4 is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0043] Figure 5yes Figure 4 An enlarged view of the second region 201 in FIG.

[0044] Figure 6 yes Figure 4 Another enlarged view of the second region 201 in FIG.

[0045] Figure 7 yes Figure 4 Another enlarged view of the second region 201 in FIG.

[0046] Figure 8 is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0047] Figure 9 It is a flow chart of a display panel testing method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0050] As mentioned in the background art, the crack detection circuit in the existing display panel is prone to electrostatic damage, resulting in poor display on the display panel and affecting product quality. The inventors have found that the reasons for the above problem are as follows:

[0051] Figure 1 This is a schematic structural diagram of a display panel in the related art; Figure 2 yes Figure 1 An enlarged view of the first region 107 in FIG. Figure 1 and Figure 2 The display panel has a display area 101 and a frame area 102. The frame area 102 is provided with a dam structure 103, a crack detection control circuit 104 and a plurality of crack detection lines 105. The dam structure 103 is located outside the display area 101 and is used to prevent water vapor from entering the display area 101. Among the crack detection lines 105, every two adjacent crack detection lines 105 need to be switched in the middle position of the upper frame area, that is, in the first area 107. The switching process specifically refers to electrically connecting the two crack detection lines 105 located in the same metal layer through vias in other metal layers. The vias used in the switching process usually need to be set directly below the dam structure 103 or on the inner side of the dam structure 103. Under this design scheme, in order to perform line switching processing, each crack detection line 105 will have a corner (for example, a right angle) 108 in the first area 107, so that the corners 108 of each crack detection line 105 are adjacent, and the distance between adjacent crack detection lines 105 is generally about 20μm-50μm, so that the corners 108 of adjacent crack detection lines 105 are close. When the display panel is subjected to anti-static experimental testing, tip discharges will occur at positions adjacent to the corners 108, resulting in electrostatic damage. Once the film layer in the first area 107 is electrostatically damaged, it will damage the dam structure 103, allowing water vapor to penetrate into the display area 101 through the dam structure 103, and ultimately cause poor display. In addition, in order to better resist static electricity, one or more electrostatic protection lines 106 are also provided in the border area 102 outside each crack detection line 105 for electrostatic shielding. However, this will increase the area of ​​the border area 102, which is not conducive to achieving a narrow border design.

[0052] To address the issue of electrostatic damage to display panels, existing display panel products typically apply a layer of conductive material, such as conductive cloth or copper foil, to the entire front and back of the module. This conductive material dissipates static electricity from the screen during electrostatic testing, preventing it from entering the screen. However, this adds a coating step to the display panel production process and increases the production cost of the display panel.

[0053] In view of the above problems, an embodiment of the present invention provides a display panel. Figure 3 Schematic diagram of the structure of a display panel provided by an embodiment of the present invention. Figure 3The display panel has a display area 10 and a non-display area, the non-display area being the frame area 20. The display panel specifically includes at least one crack detection line group 40. The crack detection line group 40 is located in the frame area 20. Each crack detection line group 40 includes a first crack detection line 410 and a second crack detection line 420. Both the first crack detection line 410 and the second crack detection line 420 are used to transmit test signals to implement crack detection. Both the first crack detection line 410 and the second crack detection line 420 extend around the display area 10. The second crack detection line 420 is located outside the first crack detection line 410, and the first crack detection line 410 and the second crack detection line 420 are short-circuited.

[0054] The number of the crack detection line group 40 can be one or more. Figure 3 In the figure, a display panel including one crack detection line group 40 is taken as an example for illustration.

[0055] The first crack detection line 410 and the second crack detection line 420 extend in the same direction. Both can extend around at least three sides of the display area 10, or around the entire display area 10. The first crack detection line 410 and the second crack detection line 420 are short-circuited, that is, the first crack detection line 410 and the second crack detection line 420 are electrically connected to each other. The location on the first crack detection line 410 that short-circuits with the second crack detection line 420 can be a location other than the two ends of the first crack detection line 410, and the location on the second crack detection line 420 that short-circuits with the first crack detection line 410 can be a location other than the two ends of the second crack detection line 420. This allows the shorting line between the first crack detection line 410 and the second crack detection line 420 to be located in the area between the two. Compared with the prior art, the technical solution of this embodiment does not need to electrically connect the first crack detection line 410 and the second crack detection line 420 by replacing the line, so as to avoid forming a corner (for example, Figure 2 Corner 108 shown).

[0056] The first crack detection line 410 and the second crack detection line 420 are used to identify whether a crack has appeared on the screen. Whether the first crack detection line 410 and the second crack detection line 420 can normally transmit a test signal can be used to test whether the display panel has a crack. The specific principle is as follows: when a test signal is input to the first crack detection line 410, if no crack appears in the area of ​​the display panel corresponding to the first crack detection line 410, the first crack detection line 410 remains intact and does not break, allowing the test signal to be normally transmitted through the first crack detection line 410. When a test signal is input to the first crack detection line 410, if a crack appears in the area of ​​the display panel corresponding to the first crack detection line 410, the first crack detection line 410 will break, and the test signal will not be normally transmitted through the first crack detection line 410. Therefore, by detecting whether the test signal can be normally transmitted through the first crack detection line 410, it can be determined whether a crack has appeared in the area of ​​the display panel corresponding to the first crack detection line 410. The principle of second crack detection line 420 identifying screen cracks is the same as that of first crack detection line 410 and will not be repeated here. By placing second crack detection line 420 outside first crack detection line 410, cracks in different areas of the screen can be identified using first crack detection line 410 and second crack detection line 420 respectively.

[0057] The technical solution of an embodiment of the present invention provides at least one crack detection line group within the frame area, each crack detection line group including a first crack detection line and a second crack detection line, both of which are used to transmit test signals to test whether a display panel has cracks. Furthermore, by arranging the first and second crack detection lines to extend around the display area, with the second crack detection line located outside the first crack detection line, and short-circuiting the first and second crack detection lines, the short-circuit between the first and second crack detection lines can be located in the area between the two. Compared to the prior art, this eliminates the need to electrically connect the first and second crack detection lines through line replacement, helping to avoid the formation of corners in the area where the first and second crack detection lines are electrically connected. This, in turn, avoids electrostatic damage caused by adjacent corners of crack detection lines in the display panel, thereby improving the quality of display panel products. Furthermore, this solution alleviates the electrostatic damage problem by improving the layout and electrical connection of the crack detection lines, and also avoids additional manufacturing processes and costs for the display panel.

[0058] Continue to see Figure 3Based on the above embodiment, optionally, the display panel further includes: a plurality of sub-pixel units and a plurality of data lines 30. The sub-pixel units are connected to corresponding data lines 30. The first crack detection line 410 and the second crack detection line 420 are both used to connect to corresponding data lines 30 to transmit test signals to the sub-pixel units through the data lines 30 and drive them to emit light, thereby realizing crack detection. The first crack detection line 410 and the second crack detection line 420 correspond to different data lines 30.

[0059] Specifically, the sub-pixel units can be arranged in an array in the display area 10, and each sub-pixel unit can include a light-emitting device and a pixel circuit for driving the light-emitting device to perform light-emitting display. The light-emitting device can be an organic light-emitting diode (OLED) or a micron-sized light-emitting diode Micro-LED, etc. The pixel circuit can be composed of a thin film transistor and a storage capacitor. The thin film transistor includes a driving transistor and a switching transistor. The pixel circuit is connected to the corresponding data line 30 through the switching transistor. When the switching transistor in the pixel circuit is turned on, the data voltage on the data line 30 can be transmitted to the storage capacitor, and the data voltage is stored by the storage capacitor so that the driving transistor can generate a driving current according to the data voltage stored in the storage capacitor, thereby driving the light-emitting device to perform light-emitting display. The pixel circuits in each column of sub-pixel units can be connected to the same data line 30, and the pixel circuits in sub-pixel units in different columns are connected to different data lines 30.

[0060] The first crack detection line 410 and the second crack detection line 420 are both connected to corresponding data lines 30. Both can be connected to at least one data line 30, and the data lines 30 connected to each other are different. Optionally, the first crack detection line 410 and the second crack detection line 420 are both connected to corresponding data lines 30 via switches, so that the switches can control the connection or disconnection between each first crack detection line 410 and the corresponding data line 30, and control the connection or disconnection between each second crack detection line 420 and the corresponding data line 30.

[0061] Whether the display panel has cracks can be tested based on the luminescence of the sub-pixel units corresponding to the data lines 30 connected to the first crack detection line 410 and the sub-pixel units corresponding to the data lines 30 connected to the second crack detection line 420. For example, when a test signal is input to the first crack detection line 410, if no cracks appear in the display panel's area corresponding to the first crack detection line 410, the first crack detection line 410 can remain intact and not break, allowing the test signal input to the first crack detection line 410 to be transmitted to the corresponding sub-pixel units through the data lines 30 connected thereto, causing the sub-pixel units to illuminate normally, and the brightness of the sub-pixel units to be the brightness corresponding to the test signal. When a test signal is input to the first crack detection line 410, if a crack appears in the display panel's area corresponding to the first crack detection line 410, the first crack detection line 410 will break, and the test signal will not be transmitted to the data lines 30 connected to the first crack detection line 410, thus failing to illuminate the sub-pixel units normally, and the brightness of the sub-pixel units will be different from the brightness corresponding to the test signal. The principle of the second crack detection line 420 for identifying screen cracks is the same as that of the first crack detection line 410 and will not be described in detail.

[0062] Continue to see Figure 3 On the basis of the above embodiment, optionally, the display panel further includes a first switch 510 and a second switch 520, both of which are located in the border area 20, and the first crack detection line 410 is connected to the corresponding data line 30 through the first switch 510, and the first switch 510 is used to control the connection or disconnection between the first crack detection line 410 and the corresponding data line 30, and the second crack detection line 420 is connected to the corresponding data line 30 through the second switch 520, and the second switch 520 is used to control the connection or disconnection between the second crack detection line 420 and the corresponding data line 30.

[0063] Specifically, when the first crack detection line 410 is used to identify a screen crack, a control signal can be applied to the control end of the first switch 510 to connect the first crack detection line 410 to the corresponding data line 30. When the first crack detection line 410 is no longer used to identify a screen crack, a control signal can be applied to the control end of the first switch 510 to disconnect the first crack detection line 410 from the corresponding data line 30. Similarly, when the second crack detection line 420 is used to identify a screen crack, a control signal can be applied to the control end of the second switch 520 to connect the second crack detection line 420 to the corresponding data line 30. When the second crack detection line 420 is no longer used to identify a screen crack, a control signal can be applied to the control end of the second switch 520 to disconnect the second crack detection line 420 from the corresponding data line 30.

[0064] Furthermore, the first switch 510 may include a first transistor, which is connected between the first crack detection line 410 and the corresponding data line 30, and the gate of the first transistor may serve as the control end of the first switch 510; the second switch 520 may include a second transistor, which is connected between the second crack detection line 420 and the corresponding data line 30, and the gate of the second transistor may serve as the control end of the second switch 520.

[0065] Continue to see Figure 3 The border area 20 of the display panel specifically includes an upper border area, a lower border area, a left border area and a right border area. The first crack detection line 410 and the second crack detection line 420 both extend from one side of the lower border area through the left border area, the upper border area and the right border area to the other side of the lower border area. The first crack detection line 410 and the second crack detection line 420 are short-circuited in the upper border area.

[0066] Among them, the border area 20 is located at the periphery of the display area 10, and the border area 20 can be set around the display area 10. The lower border area can be a side area of ​​the border area 20 for setting the driver chip, the upper border area is opposite to the lower border area, the left border area is opposite to the right border area, and the lower border area, the left border area, the upper border area and the right border area are adjacent in sequence. One end of the first crack detection line 410 starts from one side of the lower border area and extends to the other side of the lower border area through the left border area, the upper border area and the right border area in sequence. Figure 3 As shown, the first crack detection line 410 may be disconnected at both ends of the lower frame area, so that the first crack detection line 410 surrounds the display area 10 near the edges of the left, upper, and right frame areas, as well as a portion of the edge near the lower frame area. In other embodiments, the first crack detection line 410 may be connected at both ends of the lower frame area, so that the first crack detection line 410 surrounds the display area 10. Similarly, the second crack detection line 420 may be connected or disconnected at both ends of the lower frame area.

[0067] Compared with the prior art, in this embodiment, the first crack detection line 410 and the second crack detection line 420 are arranged to extend from one side of the lower frame area through the left frame area, the upper frame area and the right frame area in sequence to the other side of the lower frame area, and the first crack detection line 410 and the second crack detection line 420 are short-circuited in the upper frame area, so that the first crack detection line 410 and the second crack detection line 420 in the upper frame area are aligned, and there is no need to electrically connect the first crack detection line 410 and the second crack detection line 420 by changing the line processing, thereby avoiding the first crack detection line 410 and the second crack detection line 420 from forming a corner in the middle area of ​​the upper frame area (for example, Figure 2 The corner 108 shown is used to improve the electrostatic damage problem caused by the adjacent corners of the crack detection line in the display panel.

[0068] Preferably, the first crack detection line 410 and the second crack detection line 420 can be short-circuited in the middle position of the upper frame area, that is, the short-circuit wire of the first crack detection line 410 and the second crack detection line 420 can be located in the middle position of the upper frame area. In this way, the short-circuit wire can divide the first crack detection line 410 and the second crack detection line 420 into two parts as a whole, so that the first crack detection line 410 and the second crack detection line 420 on one side of the short-circuit wire can be used to identify cracks on one side of the upper frame area, the left frame area and one side of the lower frame area, and the first crack detection line 410 and the second crack detection line 420 on the other side of the short-circuit wire can be used to identify cracks on the other side of the upper frame area, the right frame area and the other side of the lower frame area.

[0069] In other embodiments, the first crack detection line 410 and the second crack detection line 420 can be short-circuited in any area of ​​the upper frame area, or in the left frame area and the right frame area, or in the lower frame area as required. For example, they can be short-circuited at positions other than the two ends of the first crack detection line 410 and the second crack detection line 420 in the lower frame area. The present invention does not limit the specific position where the first crack detection line 410 and the second crack detection line 420 are short-circuited.

[0070] Continue to see Figure 3 Optionally, the first crack detection line 410 includes a first shorting point n1, and the second crack detection line 420 includes a second shorting point n2. The first crack detection line 410 and the second crack detection line 420 are short-circuited via the first shorting point n1 and the second shorting point n2. The first crack detection lines 410 on either side of the first shorting point n1 are respectively connected to corresponding data lines 30, and the first crack detection lines 410 on either side of the first shorting point n1 correspond to different data lines 30. The second crack detection lines 420 on either side of the second shorting point n2 are respectively connected to corresponding data lines 30, and the second crack detection lines 420 on either side of the second shorting point n2 correspond to different data lines 30.

[0071] For example, the first crack detection line 410 on one side of the first shorting point n1 may be the first crack detection line 410 located on the left side of the lower frame area, the left frame area, and the left side of the upper frame area, that is, the first crack detection line 410 located in the left half of the frame area 20. The first crack detection line 410 on the other side of the first shorting point n1 may be the first crack detection line 410 located on the right side of the lower frame area, the right frame area, and the right side of the upper frame area, that is, the first crack detection line 410 located in the right half of the frame area 20. By setting the first crack detection lines 410 on both sides of the first shorting point n1 to be respectively connected to corresponding data lines 30, and the first crack detection lines 410 on both sides of the first shorting point n1 corresponding to different data lines 30, when a test signal is input to the first crack detection line 410 on either side of the first shorting point n1, it can be determined whether a crack exists in the area where the first crack detection line 410 on that side is located based on the luminescence of the sub-pixel unit corresponding to the data line 30 connected to the first crack detection line 410 on that side.

[0072] Similarly, the second crack detection line 420 on one side of the second shorting point n2 can be the second crack detection line 420 located on the left side of the lower frame area, the left frame area, and the left side of the upper frame area, that is, the second crack detection line 420 located in the left half of the frame area 20. The second crack detection line 420 on the other side of the second shorting point n2 can be the second crack detection line 420 located on the right side of the lower frame area, the right frame area, and the right side of the upper frame area, that is, the second crack detection line 420 located in the right half of the frame area 20. By setting the second crack detection lines 420 on both sides of the second shorting point n2 to connect to corresponding data lines 30, and the second crack detection lines 420 on both sides of the second shorting point n2 corresponding to different data lines 30, when a test signal is input to the second crack detection line 420 on either side of the second shorting point n2, it is possible to test whether a crack exists in the area where the second crack detection line 420 on that side is located based on the luminescence of the sub-pixel unit corresponding to the data line 30 connected to the second crack detection line 420 on that side.

[0073] Figure 4 FIG is a schematic diagram of the structure of another display panel provided by an embodiment of the present invention. Figure 4 Based on the above embodiments, optionally, the display panel includes two crack detection line groups, namely a first crack detection line group 40a and a second crack detection line group 40b. The first crack detection line 410a and the second crack detection line 420a in the first crack detection line group 40a are located around the first crack detection line 410b and the second crack detection line 420b in the second crack detection line group 40b. The first crack detection line group 40a and the second crack detection line group 40b are used to perform crack detection at different manufacturing stages of the display panel.

[0074] Specifically, the first crack detection line 410a and the second crack detection line 420a in the first crack detection line group 40a are short-circuited, and the specific location where the two are short-circuited can be the upper frame area. The first crack detection line 410b and the second crack detection line 420b in the second crack detection line group 40b are short-circuited, and the specific location where the two are short-circuited can also be the upper frame area. In this way, the first crack detection line 410a, the second crack detection line 420a, the first crack detection line 410b, and the second crack detection line 420b in the upper frame area are all aligned, and there is no need to electrically connect the first crack detection line 410a and the second crack detection line 420a by changing the line processing, nor is there any need to electrically connect the first crack detection line 410b and the second crack detection line 420b by changing the line processing, thus avoiding the first crack detection line 410a, the second crack detection line 420a, the first crack detection line 410b, and the second crack detection line 420b from forming a corner in the middle area of ​​the upper frame area (for example, Figure 2 The corner 108 shown is used to improve the electrostatic damage problem caused by the adjacent corners of the crack detection line in the display panel.

[0075] The manufacturing stages of a display panel can include the screen manufacturing stage and the module manufacturing stage. The screen manufacturing stage refers to the manufacturing stage of the display panel before the driver chip is bonded, while the module manufacturing stage refers to the manufacturing stage after the display panel and its driver chip are bonded. Since the screen process stage is before the module process stage, and the first crack detection line 410a and the second crack detection line 420a in the first crack detection line group 40a are located outside the first crack detection line 410b and the second crack detection line 420b in the second crack detection line group 40b, and considering that cracks generated in the display panel during cutting or transportation generally extend from the outside to the inside of the display panel, crack detection can be performed through the first crack detection line 410a and the second crack detection line 420a in the first crack detection line group 40a in the screen process stage, and crack detection can be performed through the first crack detection line 410b and the second crack detection line 420b in the second crack detection line group 40b in the module process stage, so that cracks generated in the display panel at different process stages can be detected.

[0076] Figure 5 yes Figure 4 An enlarged view of the second area 201 in FIG. Figure 5 The arrow in the figure indicates the current direction of the test signal. Figure 4 and Figure 5 , the crack detection principle of display panels at different process stages is explained.

[0077] During the display manufacturing process, a test signal can be provided to the second crack detection line 420a in the first crack detection line group 40a to test whether the display panel has cracks based on the light emission of the sub-pixel units corresponding to the data lines 30 connected to the first crack detection line 410a and the sub-pixel units corresponding to the data lines 30 connected to the second crack detection line 420a in the first crack detection line group 40a. Specifically, the test signal can be provided simultaneously to the second crack detection lines 420a on the left and right sides of the lower bezel area. When no cracks appear in the display panel, the test signal is input to the second short-circuit point n2 of the second crack detection line 420a in the upper frame area via the second crack detection lines 420a on the left and right sides, and then input to the first crack detection lines 410a on the left and right sides of the first short-circuit point n1, so that the sub-pixel units corresponding to the data lines 30 connected to the second crack detection lines 420a on the left and right sides of the second short-circuit point n2, and the sub-pixel units corresponding to the data lines 30 connected to the first crack detection lines 410a on the left and right sides of the first short-circuit point n1 can all be normally lit, and the brightness of each column of sub-pixel units is the brightness corresponding to the test signal, based on which it can be determined that no cracks appear in the display panel. When a crack appears on the left side of the display panel and the crack extends to the second crack detection line 420a on the left side of the second short circuit point n2, the second crack detection line 420a on the left side of the second short circuit point n2 will be broken, so that the data line 30 connected to the second crack detection line 420a on the left side of the second short circuit point n2 cannot input the test signal, and thus the corresponding sub-pixel unit cannot be normally lit up. However, the data line 30 connected to the second crack detection line 420a on the right side of the second short circuit point n2 and the first crack detection line 410a on the left and right sides of the first short circuit point n1 can input the test signal and can normally light up the corresponding sub-pixel unit, so that the brightness of each column of sub-pixel units is inconsistent, and the sub-pixel unit corresponding to the data line 30 connected to the second crack detection line 420a on the left side of the second short circuit point n2 presents an abnormal dark line or bright line image. Based on this, it can be determined that a crack has appeared in the area where the second crack detection line 420a on the left side of the second short circuit point n2 is located, while no crack has appeared in other areas. When a crack appears in the area where any of the second crack detection line 420a on the right side of the second short circuit point n2, the first crack detection line 410a on the left side of the first short circuit point n1, and the first crack detection line 410a on the right side of the first short circuit point n1 are located, the area where the crack appears in the display panel can be determined based on the sub-pixel unit that cannot be normally lit by the test signal, that is, the sub-pixel unit that presents an abnormal dark line or bright line image. The specific principle is the same as above and will not be repeated here.

[0078] During the module manufacturing stage, a test signal can be provided to the second crack detection line 420b in the second crack detection line group 40b to test whether the display panel has cracks based on the light emission of the sub-pixel units corresponding to the data lines 30 connected to the first crack detection line 410b and the sub-pixel units corresponding to the data lines 30 connected to the second crack detection line 420b in the second crack detection line group 40b. Specifically, the test signal can be provided simultaneously to the second crack detection lines 420b on the left and right sides of the lower frame area. When no cracks appear in the display panel, the test signal is input to the second short-circuit point n2 of the second crack detection line 420b in the upper frame area via the second crack detection lines 420b on the left and right sides, and then input to the first crack detection lines 410b on the left and right sides of the first short-circuit point n1, so that the sub-pixel units corresponding to the data lines 30 connected to the second crack detection lines 420b on the left and right sides of the second short-circuit point n2, and the sub-pixel units corresponding to the data lines 30 connected to the first crack detection lines 410b on the left and right sides of the first short-circuit point n1 can all be lit normally, and the brightness of each column of sub-pixel units is the brightness corresponding to the test signal, based on which it can be determined that no cracks appear in the display panel. When a crack appears in the area where any of the second crack detection lines 420b on the left and right sides of the second short circuit point n2 and the first crack detection lines 410b on the left and right sides of the first short circuit point n1 are located, the area where the crack appears in the display panel can be determined based on the sub-pixel units that cannot be normally illuminated by the test signal, that is, the sub-pixel units that present abnormal dark lines or bright lines. The specific principle is similar to that of the above embodiment and will not be repeated here.

[0079] In another embodiment, during the screen process stage, a test signal can be provided to the first crack detection line 410a in the first crack detection line group 40a to test whether cracks appear on the display panel based on the luminescence conditions of the sub-pixel unit corresponding to the data line 30 connected to the first crack detection line 410a in the first crack detection line group 40a and the sub-pixel unit corresponding to the data line 30 connected to the second crack detection line 420a. Specifically, a test signal can be provided to the first crack detection line 410a on the left and right sides of the lower frame area at the same time. Since the first crack detection line 410a and the second crack detection line 420a are short-circuited, when no crack appears in the display panel, the test signal is input to the first short-circuit point n1 of the first crack detection line 410a in the upper frame area via the first crack detection lines 410a on the left and right sides, and then input to the second crack detection lines 420a on the left and right sides of the second short-circuit point n2, so that the sub-pixel units corresponding to the data lines 30 connected to the second crack detection lines 420a on the left and right sides of the second short-circuit point n2, and the sub-pixel units corresponding to the data lines 30 connected to the first crack detection lines 410a on the left and right sides of the first short-circuit point n1 can all be normally lit, and the brightness of each column of sub-pixel units is the brightness corresponding to the test signal, thereby determining that no crack appears in the display panel. When a crack appears in the area where any of the second crack detection lines 420a on the left and right sides of the second short circuit point n2 and the first crack detection lines 410a on the left and right sides of the first short circuit point n1 are located, the area where the crack appears in the display panel can be determined based on the sub-pixel units that cannot be normally illuminated by the test signal, that is, the sub-pixel units that present abnormal dark lines or bright lines. The specific principle is similar to that of the above embodiment and will not be repeated here.

[0080] In another embodiment, during the module process stage, a test signal is provided to the first crack detection line 410b in the second crack detection line group 40b to test whether cracks appear on the display panel based on the luminescence conditions of the sub-pixel unit corresponding to the data line 30 connected to the first crack detection line 410b in the second crack detection line group 40b and the sub-pixel unit corresponding to the data line 30 connected to the second crack detection line 420b. Specifically, a test signal can be provided to the first crack detection lines 410b on the left and right sides of the lower frame area at the same time. Since the first crack detection line 410b and the second crack detection line 420b are short-circuited, when no crack appears in the display panel, the test signal is input to the first short-circuit point n1 of the first crack detection line 410b in the upper frame area via the first crack detection lines 410b on the left and right sides, and then input to the second crack detection lines 420b on the left and right sides of the second short-circuit point n2, so that the sub-pixel units corresponding to the data lines 30 connected to the second crack detection lines 420b on the left and right sides of the second short-circuit point n2, and the sub-pixel units corresponding to the data lines 30 connected to the first crack detection lines 410b on the left and right sides of the first short-circuit point n1 can all be normally lit, and the brightness of each column of sub-pixel units is the brightness corresponding to the test signal, thereby determining that no crack appears in the display panel. When a crack appears in the area where any of the second crack detection lines 420b on the left and right sides of the second short circuit point n2 and the first crack detection lines 410b on the left and right sides of the first short circuit point n1 are located, the area where the crack appears in the display panel can be determined based on the sub-pixel units that cannot be normally lit by the test signal, that is, the sub-pixel units that present abnormal dark lines or bright lines. The specific principle is similar to that of the above embodiment and will not be repeated here.

[0081] It can be seen that the technical solution of the present invention forms a conductive path between the first crack detection line 410a and the second crack detection line 420a by short-circuiting the first crack detection line 410a and the second crack detection line 420a in the first crack detection line group 40a. When crack detection is performed on the display panel, no matter whether a test signal is provided to the first crack detection line 410a or the second crack detection line 420a, it can be identified whether cracks appear in the area where the first crack detection line 410a on the left and right sides of the first short-circuit point n1 and the second crack detection line 420a on the left and right sides of the second short-circuit point n2 in the display panel are located. Either the first crack detection line 410a or the second crack detection line 420a can be used as the test signal input side, and the other can be used as the test signal output side. Therefore, when designing the layout of the display panel, there is no need to pay too much attention to the relative positional relationship between the test signal input side and the test signal output side of the crack detection line, which helps to reduce the difficulty of layout design. Similarly, the design of the first crack detection line 410b and the second crack detection line 420b in the second crack detection line group 40b can also achieve the above beneficial effects.

[0082] See also Figure 4 On the basis of the above embodiments, optionally, each first crack detection line 410a in the first crack detection line group 40a is connected to the corresponding data line 30 through a first switch 510, and each second crack detection line 420a in the first crack detection line group 40a is connected to the corresponding data line 30 through a second switch 520. The first switches 510 connected to each first crack detection line 410a and the second switches 520 connected to each second crack detection line 420a can constitute a first switch circuit 51. When the first crack detection line 410a and the second crack detection line 420a in the first crack detection line group 40a are applied to identify screen cracks, the first switches 510 and the second switches 520 in the first switch circuit 51 can be controlled to be turned on to connect the first crack detection line 410a and the corresponding data line 30, and the second crack detection line 420a and the corresponding data line 30; when the first crack detection line 410a and the second crack detection line 420a in the first crack detection line group 40a are stopped from being applied to identify screen cracks, the first switches 510 and the second switches 520 in the first switch circuit 51 can be controlled to be turned off to disconnect the first crack detection line 410a and the corresponding data line 30, and disconnect the second crack detection line 420a and the corresponding data line 30.

[0083] Furthermore, each first crack detection line 410b in the second crack detection line group 40b is connected to the corresponding data line 30 through the first switch 510, and each second crack detection line 420b in the second crack detection line group 40b is connected to the corresponding data line 30 through the second switch 520. The first switch 510 connected to each first crack detection line 410b and the second switch 520 connected to each second crack detection line 420b can constitute a second switch circuit 52. When the first crack detection line 410b and the second crack detection line 420b in the second crack detection line group 40b are applied to identify screen cracks, the first switches 510 and the second switches 520 in the second switch circuit 52 can be controlled to be turned on to connect the first crack detection line 410b and the corresponding data line 30, and the second crack detection line 420b and the corresponding data line 30; when the first crack detection line 410b and the second crack detection line 420b in the second crack detection line group 40b are stopped from being applied to identify screen cracks, the first switches 510 and the second switches 520 in the second switch circuit 52 can be controlled to be turned off to disconnect the first crack detection line 410b and the corresponding data line 30, and disconnect the second crack detection line 420b and the corresponding data line 30.

[0084] Continue to see Figure 4On the basis of the above embodiments, optionally, the display panel further includes a dam structure 70, which is located on the periphery of the display area 10, and the first crack detection line group 40a and the second crack detection line group 40b are both located on the periphery of the dam structure 70. In this way, the dam structure 70 can not only block water vapor from entering the display area 10, but also prevent the first crack detection line group 40a and the second crack detection line group 40b from affecting the film layer structure in the display area 10.

[0085] Continue to see Figure 4 Optionally, the display panel further includes: at least one test terminal 60 and at least one bonding connection portion 80. The test terminal 60 is located in the frame area 20 and is connected to the second crack detection line 420a in the first crack detection line group 40a, and is used to provide a test signal to the second crack detection line 420a in the first crack detection line group 40a. The frame area 20 includes a driver chip bonding area 210. The bonding connection portion 80 is located in the driver chip bonding area 210 and is used to connect the signal terminal in the driver chip and the second crack detection line 420b in the second crack detection line group 40b to provide the received test signal to the second crack detection line 420b in the second crack detection line group 40b.

[0086] Specifically, during the screen manufacturing process, since the display panel has not yet been bonded to the driver chip, a test terminal 60 can be provided in the frame area 20. By applying a test signal to the test terminal 60, the test signal can be transmitted to the second crack detection line 420a in the first crack detection line group 40a via the test terminal 60, and then transmitted to the first crack detection line 410a via the second crack detection line 420a to perform crack detection. The driver chip bonding area 210 is used to bond the driver chip. The driver chip is provided with multiple signal terminals. The signal terminals in the driver chip can be bonded to the bonding connection portion 80 in the driver chip bonding area 210, so that the signal terminals in the driver chip can transmit signals to the display panel through the bonding connection portion 80. During the module process stage, since the display panel and its driver chip have been bonded, a test signal can be transmitted to the display panel through the driver chip. The test signal can be transmitted in sequence through the signal end in the driver chip and the bonding connection part 80 to the second crack detection line 420b in the second crack detection line group 40b, and the test signal can be transmitted to the first crack detection line 410b through the second crack detection line 420b for crack detection.

[0087] Furthermore, the test terminal 60 may include a first test terminal 60a and a second test terminal 60b. The first test terminal 60a is connected to the second crack detection line 420a in the first crack detection line group 40a on one side of the lower frame area, and the second test terminal 60b is connected to the second crack detection line 420a in the first crack detection line group 40a on the other side of the lower frame area. The bonding connection portion 80 includes a first bonding connection portion 80a and a second bonding connection portion 80b. The driver chip bonding area 210 is located in the lower frame area. The first bonding connection portion 80a is located on the side of the driver chip bonding area 210 close to the left frame area, and the second bonding connection portion 80b is located on the side of the driver chip bonding area 210 close to the right frame area. The first bonding connection portion 80a and the second bonding connection portion 80b are respectively connected to the second crack detection line 420b in the second crack detection line group 40b.

[0088] Specifically, the first test terminal 60a can be connected to the second crack detection line 420a on one side of the second shorting point n2, and the second test terminal 60b can be connected to the second crack detection line 420a on the other side of the second shorting point n2. The first bonding connection portion 80a can be connected to the second crack detection line 420b on one side of the second shorting point n2, and the second bonding connection portion 80b can be connected to the second crack detection line 420b on the other side of the second shorting point n2. When performing crack detection on the display panel during the screen manufacturing stage, a test signal can be simultaneously provided to the second crack detection lines 420a on both sides of the second shorting point n2. For example, a test signal can be simultaneously applied to the first test terminal 60a and the second test terminal 60b, so that the test signal is transmitted to the second crack detection lines 420a on both sides of the second shorting point n2 through the first test terminal 60a and the second test terminal 60b. When crack detection is performed on the display panel during the module manufacturing stage, a test signal can be transmitted to the second crack detection lines 420b on the left and right sides of the first shorting point n1. For example, a test signal can be applied simultaneously to the first bonding connection 80a and the second bonding connection 80b by a driver chip, so that the test signal is transmitted to the second crack detection lines 420b on the left and right sides of the first shorting point n1 through the first bonding connection 80a and the second bonding connection 80b. In this embodiment, the current direction of the test signal on the first crack detection line 410a and the second crack detection line 420a in the first crack detection line group 40a, and the first crack detection line 410b and the second crack detection line 420b in the second crack detection line group 40b can be specifically referred to. Figure 5 .

[0089] Figure 6 yes Figure 4 Another enlarged view of the second area 201 in FIG. Figure 6 The arrow in the figure indicates the current direction of the test signal. Figure 4 and Figure 6Optionally, during the screen process stage, a test signal can be provided only to the second crack detection line 420a on the side of the second short-circuit point n2 to test whether cracks appear on the display panel based on the luminescence conditions of the sub-pixel unit corresponding to the data line 30 connected to the first crack detection line 410a in the first crack detection line group 40a and the sub-pixel unit corresponding to the data line 30 connected to the second crack detection line 420a. Specifically, a test signal can be applied only to the first test terminal 60a. When no crack appears in the display panel, the test signal is input to the second short circuit n2 via the first test terminal 60a and the second crack detection line 420a on one side of the second short circuit n2, and then input to the second crack detection line 420a on the other side of the second short circuit n2 and the first crack detection lines 410a on the left and right sides of the first short circuit n1, so that the sub-pixel units corresponding to the data lines 30 connected to the second crack detection lines 420a on the left and right sides of the second short circuit n2, and the sub-pixel units corresponding to the data lines 30 connected to the first crack detection lines 410a on the left and right sides of the first short circuit n1 can all be normally lit, and the brightness of each column of sub-pixel units is the brightness corresponding to the test signal, thereby determining that no crack appears in the display panel. When a crack appears in the area where any of the second crack detection lines 420a on the left and right sides of the second short circuit point n2 and the first crack detection lines 410a on the left and right sides of the first short circuit point n1 are located, the area where the crack appears in the display panel can be determined based on the sub-pixel units that cannot be normally lit by the test signal, that is, the sub-pixel units that present abnormal dark lines or bright lines. The specific principles will not be repeated here.

[0090] Combine Figure 4 and Figure 6Optionally, during the module process stage, a test signal can be provided only to the second crack detection line 420b on the side of the first short-circuit point n1 to test whether cracks appear on the display panel based on the luminescence conditions of the sub-pixel unit corresponding to the data line 30 connected to the first crack detection line 410b in the second crack detection line group 40b and the sub-pixel unit corresponding to the data line 30 connected to the second crack detection line 420b. Specifically, the test signal can be applied only to the first bonding connection part 80a through the driving chip. When no crack appears in the display panel, the test signal is input to the second short circuit n2 via the first bonding connection part 80a and the second crack detection line 420b on one side of the second short circuit n2, and then input to the second crack detection line 420b on the other side of the second short circuit n2 and the first crack detection lines 410b on the left and right sides of the first short circuit n1, so that the sub-pixel units corresponding to the data lines 30 connected to the second crack detection lines 420b on the left and right sides of the second short circuit n2 and the sub-pixel units corresponding to the data lines 30 connected to the first crack detection lines 410b on the left and right sides of the first short circuit n1 can all be normally lit, and the brightness of each column of sub-pixel units is the brightness corresponding to the test signal, thereby determining that no crack appears in the display panel. When a crack appears in the area where any of the second crack detection lines 420b on the left and right sides of the second short circuit point n2 and the first crack detection lines 410b on the left and right sides of the first short circuit point n1 are located, the area where the crack appears in the display panel can be determined based on the sub-pixel units that cannot be normally lit by the test signal, that is, the sub-pixel units that present abnormal dark lines or bright lines. The specific principles will not be repeated here.

[0091] Figure 7 yes Figure 4 Another enlarged view of the second area 201 in FIG. Figure 7 The arrow in the figure indicates the current direction of the test signal. Figure 4 and Figure 7Optionally, during the screen manufacturing stage, a test signal may be provided only to the second crack detection line 420a on the other side of the second shorting point n2, for example, by applying a test signal only to the second test terminal 60b. This allows the display panel to be tested for cracks based on the luminescence of the sub-pixel units corresponding to the data line 30 connected to the first crack detection line 410a and the sub-pixel units corresponding to the data line 30 connected to the second crack detection line 420a in the first crack detection line group 40a. During the module manufacturing stage, a test signal may be provided only to the second crack detection line 420b on the other side of the second shorting point n2, for example, by applying a test signal only to the second bonding connection 80b via a driver chip. This allows the display panel to be tested for cracks based on the luminescence of the sub-pixel units corresponding to the data line 30 connected to the first crack detection line 410b and the sub-pixel units corresponding to the data line 30 connected to the second crack detection line 420b in the second crack detection line group 40b. In this embodiment, the current directions of the test signals on the first crack detection line 410a and the second crack detection line 420a in the first crack detection line group 40a, and the first crack detection line 410b and the second crack detection line 420b in the second crack detection line group 40b can be specifically referred to. Figure 7 , the principle will not be repeated.

[0092] Figure 4Only the example in which each test terminal 60 is connected to the second crack detection line 420a in the first crack detection line group 40a, and each bonding connection 80 is connected to the second crack detection line 420b in the second crack detection line group 40b, is shown. In other embodiments, the test terminals 60 may also be connected to the first crack detection line 410a in the first crack detection line group 40a to provide a test signal to the first crack detection line 410a in the first crack detection line group 40a. The bonding connection 80 is connected to a signal terminal in the driver chip and the first crack detection line 410b in the second crack detection line group 40b to provide the received test signal to the first crack detection line 410b in the second crack detection line group 40b. Accordingly, when the test terminal 60 includes a first test terminal 60a and a second test terminal 60b, the first test terminal 60a can be connected to the first crack detection line 410a in the first crack detection line group 40a on one side of the lower frame area, and the second test terminal 60b can be connected to the first crack detection line 410a in the first crack detection line group 40a on the other side of the lower frame area. When the bonding connection portion 80 includes a first bonding connection portion 80a and a second bonding connection portion 80b, the first bonding connection portion 80a and the second bonding connection portion 80b can be respectively connected to the first crack detection line 410b in the second crack detection line group 40b. For example, the first test terminal 60a can be connected to the first crack detection line 410a on one side of the first shorting point n1, and the second test terminal 60b can be connected to the first crack detection line 410a on the other side of the first shorting point n1. The first bonding connection portion 80a can be connected to the first crack detection line 410b on one side of the first shorting point n1, and the second bonding connection portion 80b can be connected to the first crack detection line 410b on the other side of the first shorting point n1. In this embodiment, during the screen manufacturing stage, a test signal can be provided to the first crack detection line 410a on at least one side of the first shorting point n1. For example, a test signal is applied to the first test terminal 60a and / or the second test terminal 60b to test whether the display panel has cracks based on the light emission of the sub-pixel unit corresponding to the data line 30 connected to the first crack detection line 410a in the first crack detection line group 40a and the sub-pixel unit corresponding to the data line 30 connected to the second crack detection line 420a. During the module manufacturing stage, a test signal can be provided to the first crack detection line 410b on at least one side of the first shorting point n1. For example, a test signal is applied to the first bonding connection 80a and / or the second bonding connection 80b via a driver chip to test whether the display panel has cracks based on the light emission of the sub-pixel units corresponding to the data lines 30 connected to the first crack detection line 410b and the sub-pixel units corresponding to the data lines 30 connected to the second crack detection line 420b in the second crack detection line group 40b. The specific principles are the same as above and will not be repeated here.

[0093] Figure 8FIG is a schematic diagram of the structure of another display panel provided by an embodiment of the present invention. Figure 8 On the basis of the above embodiments, optionally, the display panel further includes a third crack detection line 90, which extends around the display area 10. The third crack detection line 90 is located at the periphery of each crack detection line group, and the third crack detection line 90 is used to reflect whether a crack occurs in the display panel through its resistance value.

[0094] Specifically, the third crack detection line 90 can extend from one side of the lower frame area through the left frame area, the upper frame area, and the right frame area to the other side of the lower frame area. The third crack detection line 90 can be set to be connected to each other or not connected at both ends of the lower frame area. For example, when the display panel includes a first crack detection line group 40a and a second crack detection line group 40b, the third crack detection line 90 can be set at the periphery of the first crack detection line group 40a, that is, at the periphery of the second crack detection line 420a in the first crack detection line group 40a. The first crack detection line 410a and the second crack detection line 420a in the first crack detection line group 40a, the first crack detection line 410b and the second crack detection line 420b in the second crack detection line group 40b, and the third crack detection line 90 can extend in the same direction. The driver chip bonding area 210 may also include a third bonding connection portion 80c and a fourth bonding connection portion 80d for connecting the signal end of the driver chip. The third crack detection line 90 may be connected to the third bonding connection portion 80c and the fourth bonding connection portion 80d at both ends of the lower frame area.

[0095] The resistance value of third crack detection line 90 can be preset. When a crack appears in the display panel, causing third crack detection line 90 to break, the resistance value of third crack detection line 90 changes. Therefore, when crack detection is performed on the display panel, a test signal can be transmitted by the driver chip to third bonding connection 80c and fourth bonding connection 80d. The received test signal is then provided to third crack detection line 90 via third bonding connection 80c and fourth bonding connection 80d. By detecting the resistance value of third crack detection line 90, it can be determined whether a crack has occurred in the area of ​​the display panel corresponding to the location of third crack detection line 90.

[0096] The technical solution of the embodiment of the present invention, by setting up a third crack detection line 90, can, on the one hand, test whether cracks appear in the area where the third crack detection line 90 is set. Since the third crack detection line 90 is located outside each crack detection line group, and considering that cracks generated in the display panel during cutting or transportation generally extend from the outside to the inside of the display panel, the third crack detection line 90 can detect cracks in the display panel before the other crack detection line groups, helping to ensure that cracks can be detected in a timely manner at an early stage of the process. On the other hand, by locating the third crack detection line 90 outside each crack detection line group, the third crack detection line 90 can also be used to electrostatically shield the display panel, eliminating the need for additional electrostatic protection wiring, which is conducive to achieving a narrow bezel design.

[0097] Based on the above embodiments, the corners around the first crack detection line 410a and the second crack detection line 420a in the first crack detection line group 40a, the first crack detection line 410b and the second crack detection line 420b in the second crack detection line group 40b, and the third crack detection line 90 can all be set as arc angles to avoid tip discharge at adjacent corners of each crack detection line, which helps to further alleviate the problem of electrostatic damage.

[0098] Embodiments of the present invention further provide a display device comprising the display panel of any of the above embodiments, thereby possessing the corresponding functional structures and beneficial effects of the display panel, which will not be described in detail here. The display device can be a mobile phone, or any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, vehicle-mounted displays, medical equipment, industrial control equipment, touch interactive terminals, etc., which are not specifically limited in the embodiments of the present invention.

[0099] An embodiment of the present invention further provides a method for testing a display panel, which is used to test the display panel in any of the above embodiments. Figure 9 FIG is a flow chart of a method for testing a display panel provided by an embodiment of the present invention. Figure 9 , the method specifically comprises the following steps:

[0100] S110 : Providing a test signal to the first crack detection line or the second crack detection line.

[0101] S120 : Testing whether a crack occurs on the display panel according to whether the test signals on the first crack detection line and the second crack detection line can be transmitted normally.

[0102] The technical solution of an embodiment of the present invention provides at least one crack detection line group within the frame area, each crack detection line group including a first crack detection line and a second crack detection line, both of which are used to transmit test signals to test whether a display panel has cracks. Furthermore, by arranging the first and second crack detection lines to extend around the display area, with the second crack detection line located outside the first crack detection line, and short-circuiting the first and second crack detection lines, the short-circuit between the first and second crack detection lines can be located in the area between the two. Compared to the prior art, this eliminates the need to electrically connect the first and second crack detection lines through line replacement, helping to avoid the formation of corners in the area where the first and second crack detection lines are electrically connected. This, in turn, avoids electrostatic damage caused by adjacent corners of crack detection lines in the display panel, thereby improving the quality of display panel products. Furthermore, this solution alleviates the electrostatic damage problem by improving the layout and electrical connection of the crack detection lines, and also avoids additional manufacturing processes and costs for the display panel.

[0103] Based on the above embodiment, optionally, step S120 may specifically include: testing whether the display panel has cracks according to the luminescence conditions of the sub-pixel units corresponding to the data lines connected to the first crack detection line and the sub-pixel units corresponding to the data lines connected to the second crack detection line.

[0104] Based on the above embodiment, optionally, step S110 may specifically include:

[0105] A test signal is provided to the first crack detection line located at least on one side of the first shorting point; or a test signal is provided to the second crack detection line located at least on one side of the second shorting point.

[0106] Specifically, a test signal can be provided to the first crack detection line located on one side of the first short circuit point, or a test signal can be provided to the first crack detection line located on the other side of the first short circuit point, or a test signal can be provided to the second crack detection line located on one side of the second short circuit point, or a test signal can be provided to the second crack detection line located on the other side of the second short circuit point, so as to test whether cracks appear on the display panel based on the luminescence conditions of the sub-pixel unit corresponding to the data line connected to the first crack detection line and the sub-pixel unit corresponding to the data line connected to the second crack detection line.

[0107] Based on the above embodiment, optionally, the display panel testing method further includes:

[0108] During the screen body process stage, a test signal is provided to the first crack detection line or the second crack detection line in the first crack detection line group to test whether a crack occurs in the display panel based on the light emission of the sub-pixel unit corresponding to the data line connected to the first crack detection line in the first crack detection line group and the sub-pixel unit corresponding to the data line connected to the second crack detection line;

[0109] During the module process stage, a test signal is provided to the first crack detection line or the second crack detection line in the second crack detection line group to test whether cracks appear on the display panel based on the luminescence conditions of the sub-pixel unit corresponding to the data line connected to the first crack detection line in the second crack detection line group and the sub-pixel unit corresponding to the data line connected to the second crack detection line.

[0110] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0111] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that: The display panel has a display area and a frame area, and includes: At least one crack detection line group is located in the border area, each crack detection line group includes a first crack detection line and a second crack detection line, the first crack detection line and the second crack detection line are both used to transmit a test signal to achieve crack detection, the first crack detection line and the second crack detection line both extend around the display area, the second crack detection line is located outside the first crack detection line, and the first crack detection line and the second crack detection line are short-circuited; The crack detection line group includes a first crack detection line group and a second crack detection line group. The first crack detection line and the second crack detection line in the first crack detection line group are located outside the first crack detection line and the second crack detection line in the second crack detection line group. The first crack detection line group and the second crack detection line group are used to perform crack detection at different process stages of the display panel.

2. The display panel according to claim 1, wherein: The border area includes an upper border area, a lower border area, a left border area and a right border area. The first crack detection line and the second crack detection line extend from one side of the lower border area to the other side of the lower border area through the left border area, the upper border area and the right border area in sequence. The first crack detection line and the second crack detection line are short-circuited in any area of ​​the upper border area, the lower border area, the left border area and the right border area.

3. The display panel according to claim 2, wherein: The display panel further includes: Multiple sub-pixel units and multiple data lines, the sub-pixel units are connected to the corresponding data lines, the first crack detection line and the second crack detection line are both used to connect to the corresponding data lines to transmit test signals to the sub-pixel units through the data lines and drive them to emit light to achieve crack detection, and the first crack detection line and the second crack detection line correspond to different data lines.

4. The display panel according to claim 3, wherein: The display panel further includes: The first switch and the second switch are located in the border area. The first crack detection line is connected to the corresponding data line through the first switch. The first switch is used to control the connection or disconnection between the first crack detection line and the corresponding data line. The second crack detection line is connected to the corresponding data line through the second switch. The second switch is used to control the connection or disconnection between the second crack detection line and the corresponding data line.

5. The display panel according to claim 1, wherein: The first crack detection line includes a first shorting point, the second crack detection line includes a second shorting point, and the first crack detection line and the second crack detection line are short-circuited via the first shorting point and the second shorting point; The first crack detection lines on both sides of the first shorting point are respectively used to connect to corresponding data lines, and the first crack detection lines on both sides of the first shorting point correspond to different data lines; The second crack detection lines on both sides of the second shorting point are respectively used to connect to corresponding data lines, and the second crack detection lines on both sides of the second shorting point correspond to different data lines.

6. The display panel according to claim 1, wherein: The display panel further includes: at least one test terminal located in the border area, the test terminal being connected to the first crack detection line in the first crack detection line group and configured to provide the test signal to the first crack detection line in the first crack detection line group, or the test terminal being connected to the second crack detection line in the first crack detection line group and configured to provide the test signal to the second crack detection line in the first crack detection line group; At least one bonding connection portion, the border area includes a driver chip bonding area, the bonding connection portion is located in the driver chip bonding area, the bonding connection portion is used to connect the signal end in the driver chip and the first crack detection line in the second crack detection line group to provide the received test signal to the first crack detection line in the second crack detection line group, or the bonding connection portion is used to connect the signal end in the driver chip and the second crack detection line in the second crack detection line group to provide the received test signal to the second crack detection line in the second crack detection line group.

7. The display panel according to claim 6, wherein: The test terminal includes a first test terminal and a second test terminal, the first test terminal is connected to the first crack detection line or the second crack detection line in the first crack detection line group on one side of the lower frame area, and the second test terminal is connected to the first crack detection line or the second crack detection line in the first crack detection line group on the other side of the lower frame area.

8. The display panel according to claim 7, wherein: The bonding connection portion includes a first bonding connection portion and a second bonding connection portion. The driver chip bonding area is located in the lower frame area. The first bonding connection portion is located on the side of the driver chip bonding area close to the left frame area. The second bonding connection portion is located on the side of the driver chip bonding area close to the right frame area. The first bonding connection portion and the second bonding connection portion are respectively connected to the first crack detection line or the second crack detection line in the second crack detection line group.

9. The display panel according to any one of claims 1 to 8, wherein: The display panel further includes a third crack detection line, which extends around the display area and is located at the periphery of each crack detection line group. The third crack detection line is used to reflect whether a crack occurs in the display panel through its resistance value.

10. A method for testing a display panel, for testing the display panel according to any one of claims 1 to 9, characterized in that: The display panel has a display area and a frame area, and includes: at least one crack detection line group located in the frame area, each crack detection line group including a first crack detection line and a second crack detection line, the first crack detection line and the second crack detection line both extending around the display area, the second crack detection line located outside the first crack detection line, and the first crack detection line and the second crack detection line being short-circuited; The display panel testing method includes: providing a test signal to the first crack detection line or the second crack detection line; Whether the display panel has a crack is tested according to whether the test signals on the first crack detection line and the second crack detection line can be transmitted normally.

11. The display panel testing method according to claim 10, wherein: The display panel further includes: a plurality of sub-pixel units and a plurality of data lines, the sub-pixel units being connected to corresponding data lines, the first crack detection line and the second crack detection line being connected to corresponding data lines, and the first crack detection line and the second crack detection line corresponding to different data lines; The step of testing whether a crack occurs on the display panel according to whether the test signals on the first crack detection line and the second crack detection line can be transmitted normally includes: Whether the display panel has cracks is tested according to the light emission conditions of the sub-pixel unit corresponding to the data line connected to the first crack detection line and the sub-pixel unit corresponding to the data line connected to the second crack detection line.

12. The display panel testing method according to claim 11, wherein: The first crack detection line includes a first shorting point, and the second crack detection line includes a second shorting point, and the first crack detection line and the second crack detection line are short-circuited through the first shorting point and the second shorting point; the first crack detection lines on both sides of the first shorting point are respectively used to connect to the corresponding data lines, and the first crack detection lines on both sides of the first shorting point correspond to different data lines; the second crack detection lines on both sides of the second shorting point are respectively used to connect to the corresponding data lines, and the second crack detection lines on both sides of the second shorting point correspond to different data lines; Providing a test signal to the first crack detection line or the second crack detection line includes: A test signal is provided to the first crack detection line located at least on one side of the first shorting point; or a test signal is provided to the second crack detection line located at least on one side of the second shorting point.

13. The display panel testing method according to claim 10, wherein: The crack detection line group includes a first crack detection line group and a second crack detection line group, the first crack detection line and the second crack detection line in the first crack detection line group are located outside the first crack detection line and the second crack detection line in the second crack detection line group; The process stages of the display panel include a screen process stage and a module process stage. The display panel testing method further includes: In the screen body process stage, providing the test signal to the first crack detection line or the second crack detection line in the first crack detection line group, so as to test whether the display panel has cracks according to light emission conditions of sub-pixel units corresponding to the data lines connected to the first crack detection lines and sub-pixel units corresponding to the data lines connected to the second crack detection lines in the first crack detection line group; During the module process stage, the test signal is provided to the first crack detection line or the second crack detection line in the second crack detection line group to test whether cracks appear on the display panel based on the luminescence conditions of the sub-pixel unit corresponding to the data line connected to the first crack detection line in the second crack detection line group and the sub-pixel unit corresponding to the data line connected to the second crack detection line.

14. A display device, characterized in that: The display panel comprises any one of claims 1 to 13.

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