Display panel, driving method thereof and display device

Abstract

The application provides a display panel and a driving method thereof and a display device, and relates to the technical field of display. Based on the connection mode of a switching assembly, a touch signal line and a crack detection signal line, the crack detection signal line breakage can be detected through touch testing, so that the crack detection judgment of the display panel is realized. Compared with the prior art, the PCD detection picture can be omitted, the wiring layout is simplified, the extremely narrow frame design is realized, and the purpose of realizing the crack detection without the point screen is achieved.

Description

TECHNICAL FIELD

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

[0002] With the rapid development of display technology, the frame design of display panel is continuously narrowed, and the abnormality of each manufacturing process section of the display panel will produce screen body crack, and there is a high risk of black spot or abnormal display, therefore, it is crucial to identify the screen body crack in time through panel crack detection (PCD) technology.

[0003] The existing crack detection circuit needs to point the screen to realize crack detection, which needs to add PCD detection circuit and multiple signal winding in design, resulting in limitation of extremely narrow frame design. Moreover, the PCD detection mode of pointing the screen will increase the production time and affect the production capacity. SUMMARY

[0004] In view of the above problems, the present application provides a display panel, a driving method thereof and a display device to realize crack detection of the display panel and narrow frame design, and the crack detection can be realized without pointing the screen. The specific scheme is as follows:

[0005] The first aspect of the present application provides a display panel, comprising: a switch assembly, a touch signal line, and a crack detection signal line arranged at least partially around the display panel;

[0006] The first end of the crack detection signal line is electrically connected with the touch signal line through the switch assembly, and the second end of the crack detection signal line is electrically connected with a signal end, and the signal end is used for providing a second signal;

[0007] Wherein, the first signal is transmitted on the touch signal line, and the voltage value of the first signal is different from that of the second signal;

[0008] In the crack detection stage, the switch assembly is controlled to be in the conduction state, and the signal transmitted on the touch signal line is received; the crack detection of the display panel is judged based on the signal transmitted on the touch signal line.

[0009] The second aspect of the present application provides a driving method of a display panel, comprising:

[0010] In the non-crack detection stage, the switch assembly is controlled to be in the off state;

[0011] In the crack detection stage, the switch assembly is controlled to be in a conducting state, and the signal transmitted on the touch signal line is received; crack detection of the display panel is performed based on the signal transmitted on the touch signal line.

[0012] The third aspect of the present application provides a display device, which comprises the display panel.

[0013] Through the above technical solution, the present application provides a display panel and a driving method thereof, and a display device. Based on the connection mode of the switch assembly, the touch signal line, and the crack detection signal line, the crack detection signal line breakage can be detected through touch testing, so as to realize crack detection judgment of the display panel. Compared with the prior art, the PCD detection picture can be omitted, the wiring layout is simplified, the extremely narrow frame design is realized, and the purpose of crack detection without point screen is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0014] The above and other features, advantages, and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the original and elements are not necessarily drawn according to the scale.

[0015] Figure 1 A schematic diagram of the principle of a crack detection technology for a display panel in the prior art;

[0016] Figure 2 A structural schematic diagram of a display panel provided by an embodiment of the present application;

[0017] Figure 3 A structural schematic diagram of another display panel provided by an embodiment of the present application;

[0018] Figure 4 A structural schematic diagram of another display panel provided by an embodiment of the present application;

[0019] Figure 5 A structural schematic diagram of another display panel provided by an embodiment of the present application;

[0020] Figure 6 A structural schematic diagram of another display panel provided by an embodiment of the present application;

[0021] Figure 7 A structural schematic diagram of another display panel provided by an embodiment of the present application;

[0022] Figure 8 A structural schematic diagram of another display panel provided by an embodiment of the present application;

[0023] Figure 9A flowchart of a display panel driving method provided by an embodiment of the present application is shown. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described below in conjunction with the accompanying drawings. The terms used in the embodiment part of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. It is known to those skilled in the art that, as technology develops and new scenarios appear, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0025] It should be noted that the orientation words appearing in the present application are based on the relative position relationship shown in the drawings, and cannot be used as an absolute limitation on the present application.

[0026] Based on the content described in the background, reference is made to Figure 1 , Figure 1 A principle diagram of a crack detection technology of a display panel in the prior art is shown, and in the process of the present application, it is found that Figure 1 The crack detection technology of a display panel in the prior art shown in the figure, the PCD_IN_VGH line is electrically connected to the PCD line above the display panel after winding around the display panel, and the PCD_IN_VGH line is not connected to the VGH signal line in the plane. It should be noted that the normal VT will be the VGH potential, and the module will be NC when no signal is given.

[0027] During PCD detection, the PCD_SW signal is low, and the PCD_IN_VGH signal and the PCD signal are high. When the PCD line is broken, the PCD detection column of pixels is lit, and other column pixels are not lit; on the contrary, all pixels are not lit.

[0028] That is, Figure 1 The crack detection technology of a display panel in the prior art shown in the figure needs to use a point screen to perform crack detection. The PCD detection needs to increase the PCD detection picture. In the design, the PCD detection circuit and multiple signal winding need to be newly added, which limits the design of the extremely narrow frame. Moreover, the way of using the point screen to perform PCD detection also increases the production time and affects the production capacity.

[0029] Based on this, the embodiments of the present application provide a display panel and a driving method thereof and a display device to realize crack detection of the display panel and realize narrow frame design, and crack detection can be realized without using a point screen.

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the drawings and specific embodiments.

[0031] It should be noted that the display panel provided in the embodiments of the present application can be an organic light-emitting diode (OLED) display panel, a liquid crystal panel, or a micro flat panel display (Micro-OLED or Micro-LED), etc. The present application is not limited in the embodiments.

[0032] Reference Figure 2 , Figure 2 A structural schematic diagram of a display panel provided in the embodiments of the present application. The display panel provided in the embodiments of the present application comprises a switching component 11, a touch signal line 12, and a crack detection signal line 13 arranged at least partially around the display panel.

[0033] The first end of the crack detection signal line 13 is electrically connected with the touch signal line 12 through the switching component 11, and the second end of the crack detection signal line 13 is electrically connected with a signal end 14, which is used to provide a second signal.

[0034] The first signal is transmitted on the touch signal line 12, and the voltage value of the first signal is different from that of the second signal.

[0035] In the crack detection stage, the switching component 11 is controlled to be in the on state, and the signal transmitted on the touch signal line 12 is received; and the crack detection of the display panel is judged based on the signal transmitted on the touch signal line 12.

[0036] Specifically, the number of turns of the crack detection signal line 13 around the display panel in the embodiments of the present application is not limited, and can be determined according to the actual situation.

[0037] As shown in Figure 2 The display panel is a display panel with touch function, which comprises a touch electrode layer 15 arranged on one side of the substrate in the display panel. The touch signal line 12 is electrically connected with the touch electrode layer 15, and the first signal is transmitted to the touch electrode layer 15 through the touch signal line 12, so that the display panel realizes the corresponding touch function.

[0038] As shown in Figure 2 The control end 16 of the switching component 11 is used to receive a control signal; and the control signal is used to control the switching component 11 to be in the on state or in the off state.

[0039] In the non-crack detection stage, a first control signal is sent to the control end 16 of the switch component 11, and the first control signal controls the switch component 11 to be in an off state. The first signal cannot be transmitted to the touch signal line 12 through the crack detection signal line 13 and the switch component 11. At this time, only the first signal for touch is transmitted on the touch signal line 12, and the touch electrode layer 15 can be in a normal working state, and the capacitance of the area in the touch electrode layer 15 corresponding to the touch signal line 12 is normal.

[0040] In the crack detection stage, a second control signal is sent to the control end of the switch component 11, and the second control signal controls the switch component 11 to be in a conductive state. At this time, the first signal is transmitted to the touch signal line 12 through the crack detection signal line 13 and the switch component 11, which can also be understood as the short-circuiting of the first signal and the second signal. The first signal and the second signal are transmitted on the touch signal line 12, and at this time, the first signal is interfered by the second signal, the touch electrode layer 15 is in an abnormal working state, and the capacitance of the area in the touch electrode layer 15 corresponding to the touch signal line 12 is low or exceeds the normal value.

[0041] Therefore, based on the connection mode of the switch component 11, the touch signal line 12 and the crack detection signal line 13 in the embodiment of the present application, the crack detection of the display panel can be judged by detecting the signal transmitted on the touch signal line 12.

[0042] Alternatively, in an optional embodiment of the present application, the crack detection of the display panel can also be judged by detecting the capacitance of the corresponding area of the touch electrode layer 15.

[0043] When the signal transmitted on the touch signal line 12 is different from the first signal, the capacitance of the corresponding area of the touch electrode layer 15 will also change. Therefore, when the signal detection method is more convenient or more accurate than the capacitance detection method, the crack detection of the display panel can be judged by detecting the signal transmitted on the touch signal line 12. When the capacitance detection method is more convenient or more accurate than the signal detection method, the crack detection of the display panel can be judged by detecting the capacitance of the corresponding area of the touch electrode layer 15.

[0044] In conclusion, based on the connection mode of the switch component 11, the touch signal line 12 and the crack detection signal line 13 described in the embodiment of the present application, the crack detection signal line 13 is detected by touch test to realize the crack detection judgment of the display panel. Compared with the prior art, the PCD detection picture can be omitted to realize the crack detection without point screen. In addition, the PCD detection circuit of the Array segment can be omitted in the design because the signal of the touch electrode layer 15 is used for the crack detection judgment of the display panel, and the lower frame of the display panel can be saved by 150-300 μm. In addition, the PCD winding of the Array segment metal layer of the left and right frames and the upper frame is changed into the winding mode of the crack detection signal line 13 of the touch electrode layer, and the left and right frames and the upper frame can be saved by 10-30 μm to realize the extremely narrow frame design.

[0045] In an optional embodiment of the present application, referring to Figure 3 , Figure 3 Fig. 4 is another structural schematic diagram of a display panel provided by the embodiment of the present application. In the embodiment of the present application, the switch component 11 is a thin film transistor Q.

[0046] Specifically, in the embodiment of the present application, the thin film transistor Q can be a P-type thin film transistor, and the gate of the P-type thin film transistor is in the closed state when receiving the high-level control signal; the gate of the P-type thin film transistor is in the open state when receiving the low-level control signal.

[0047] It should be noted that only one thin film transistor Q is taken as an example to illustrate the switch component 11 in the embodiment of the present application, and the switch component 11 provided by the embodiment of the present application can also be other circuit forms, which are not limited in the embodiment of the present application.

[0048] Compared with the structure shown in Figure 1 and Figure 3 , the scheme shown in Figure 3 omits the conventional PCD detection circuit in the lower frame of the display panel, and only needs to design the switch component 11 to realize the extremely narrow frame design.

[0049] In an optional embodiment of the present application, referring to Figure 4 , Figure 4 Fig. 5 is another structural schematic diagram of a display panel provided by the embodiment of the present application. In the embodiment of the present application, the signal end 14 is a ground end GND.

[0050] Specifically, in the embodiment of the present application, considering that the number of ground terminals GND in the display panel is large and distributed in various regions, obviously, electrically connecting the second end of the crack detection signal line 13 with the ground terminal GND can provide more choices for the connection point of the second end of the crack detection signal line 13, and thus the second end of the crack detection signal line 13 can stay in more regions, and thus the winding design of different degrees can be realized, and the wiring difficulty can be simplified.

[0051] The touch electrode layer includes a plurality of transversely arranged touch driving lines (Tx) and a plurality of longitudinally arranged touch sensing lines (Rx). In the touch point positioning detection process, the touch driving lines are scanned row by row, and when each touch driving line is scanned, the signals on all the touch sensing lines are read, and by scanning the touch sensing lines column by column, the intersection of each touch driving line and each touch sensing line can be scanned, so that the position of the touch point in the scanning process can be detected. Optionally, the touch unit is arranged in an array like the pixel unit, but the size is different from the pixel unit. Generally, a plurality of pixel units constitute a touch unit, each row of touch units corresponds to a touch driving line, and each column of touch units corresponds to a touch sensing line.

[0052] In an optional embodiment of the present application, referring to Figure 5 , Figure 5 Another structure diagram of a display panel provided by the embodiment of the present application is shown in FIG. 6. In the embodiment of the present application, the touch signal line 12 includes a touch driving line 121 arranged transversely. Figure 6 , Figure 6 Another structure diagram of a display panel provided by the embodiment of the present application is shown in FIG. 6. In the embodiment of the present application, the touch signal line 12 includes a touch driving line 121 arranged transversely.

[0053] The first signal is transmitted on the touch driving line 121, and the absolute value of the difference between the voltage value of the first signal and the voltage value of the second signal is greater than the first voltage value. Optionally, the first voltage value is in the range of 1.5V-1.7V.

[0054] The display panel further includes a first controller 17, and the touch driving line 121 is electrically connected with the first controller 17.

[0055] The first controller 17 is configured to provide the first signal to the touch driving line 121.

[0056] Specifically, in the embodiment of the present application, the value of the first voltage value can be determined according to actual conditions, as long as the first signal can be effectively interfered after the second signal is transmitted on the touch driving line 121.

[0057] As Figure 5As shown, the first end of the crack detection signal line 13 is electrically connected to the touch driving line 121 via a thin-film transistor Q, and the second end of the crack detection signal line 13 is electrically connected to the ground terminal GND. During the crack detection stage, a low-level control signal is applied to the gate of the thin-film transistor Q, causing the thin-film transistor Q to be in the on state. When the crack detection signal line 13 is broken, the signal at the ground terminal GND cannot be short-circuited with the first A signal, and the capacitance value of the corresponding area of ​​the touch electrode layer 15 is normal. When the crack detection signal line 13 is not broken, the signal at the ground terminal GND is short-circuited with the first A signal, and the touch driving line 121 transmits both the first A signal and the signal at the ground terminal GND. At this time, the first A signal is interfered with by the signal at the ground terminal GND, and the touch electrode layer 15 is in an abnormal working state. The capacitance value of the area in the touch electrode layer 15 corresponding to the touch driving line 121 is either too low or too high.

[0058] Optional, such as Figure 6 As shown, the first signal A can be provided to the touch drive line 121 through the first controller 17.

[0059] It should be noted that the signals transmitted on the touch drive line 121 can also be detected by the first controller 17, and the crack detection and judgment of the display panel can be performed based on the signals transmitted on the touch drive line 121.

[0060] In an optional embodiment of the present invention, reference is made to... Figure 7 , Figure 7 This is a schematic diagram of another display panel provided in an embodiment of the present invention, with reference to... Figure 8 , Figure 8 This is a schematic diagram of another display panel provided in an embodiment of the present invention. In this embodiment, the touch signal line 12 includes a vertically arranged touch sensing line 122.

[0061] The touch sensing line 122 transmits a first signal B, and the absolute value of the difference between the voltage value of the first signal B and the voltage value of the second signal is greater than a second voltage value. Optionally, the second voltage value ranges from 1.5V to 1.7V.

[0062] The display panel further includes a second controller 18, and the touch sensing line 122 is electrically connected to the second controller 18.

[0063] The second controller 18 is used to provide the first signal B to the touch sensing line 122.

[0064] Specifically, in this embodiment of the invention, the value of the second voltage can be determined according to the actual situation, as long as it can effectively interfere with the first signal after the second signal is transmitted to the touch sensing line 122.

[0065] As shown in Figure 7 , the first end of the crack detection signal line 13 is electrically connected with the touch sensing line through the thin film transistor Q, and the second end of the crack detection signal line 13 is electrically connected with the ground terminal GND. In the crack detection stage, a low-level control signal is applied to the gate of the thin film transistor Q, so that the thin film transistor Q is in an open state. When the crack detection signal line 13 is broken, the signal of the ground terminal GND cannot be short-circuited with the first B signal, and the capacitance of the corresponding region of the touch electrode layer 15 is normal. When the crack detection signal line 13 is not broken, the signal of the ground terminal GND is short-circuited with the first B signal, and the first B signal and the signal of the ground terminal GND are transmitted on the touch sensing line 122. At this time, the first B signal is interfered by the signal of the ground terminal GND, the touch electrode layer 15 is in an abnormal working state, and the capacitance of the region of the touch electrode layer 15 corresponding to the touch sensing line 122 is low or exceeds the standard.

[0066] Optionally, as shown in Figure 8 , the first B signal can be provided to the touch sensing line 122 through the second controller 18.

[0067] It should be noted that the signal transmitted on the touch sensing line 122 can also be detected by the second controller 18, and the crack detection of the display panel is judged based on the signal transmitted on the touch sensing line 122.

[0068] Based on the above-mentioned embodiments of the present application, in another embodiment of the present application, a driving method of a display panel is also provided, which is described with reference to Figure 9 , Figure 9 The flow chart of the driving method of the display panel provided in the embodiment of the present application. The driving method of the display panel provided in the embodiment of the present application comprises:

[0069] S101: In the non-crack detection stage, the switch assembly 11 is controlled to be in an open state.

[0070] S102: In the crack detection stage, the switch assembly 11 is controlled to be in a conductive state, and the signal transmitted on the touch signal line 12 is received; and the crack detection of the display panel is judged based on the signal transmitted on the touch signal line 12.

[0071] Specifically, in the non-crack detection stage of the embodiment, a first control signal is sent to the control end 16 of the switch component 11, and the first control signal controls the switch component 11 to be in an off state. The first signal cannot be transmitted to the touch signal line 12 through the crack detection signal line 13 and the switch component 11. At this time, only the first signal for touch is transmitted on the touch signal line 12, and the touch electrode layer 15 can be in a normal working state, and the capacitance of the area of the touch electrode layer 15 corresponding to the touch signal line 12 is normal.

[0072] In the crack detection stage, a second control signal is sent to the control end of the switch component 11, and the second control signal controls the switch component 11 to be in a conductive state. At this time, the first signal is transmitted to the touch signal line 12 through the crack detection signal line 13 and the switch component 11, which can also be understood as the short-circuiting of the first signal and the second signal. The first signal and the second signal are transmitted on the touch signal line 12, and at this time, the first signal is interfered by the second signal, the touch electrode layer 15 is in an abnormal working state, and the capacitance of the area of the touch electrode layer 15 corresponding to the touch signal line 12 is low or exceeds the normal value.

[0073] Therefore, based on the connection mode of the switch component 11, the touch signal line 12, and the crack detection signal line 13 in the embodiment, the crack detection of the display panel can be judged by detecting the signal transmitted on the touch signal line 12.

[0074] Alternatively, in an optional embodiment of the present application, the crack detection of the display panel can also be judged by detecting the capacitance of the corresponding area of the touch electrode layer 15.

[0075] When the signal transmitted on the touch signal line 12 is different from the first signal, the capacitance of the corresponding area of the touch electrode layer 15 will also change. Therefore, when the signal detection method is more convenient or more accurate than the capacitance detection method, the crack detection of the display panel can be judged by detecting the signal transmitted on the touch signal line 12. When the capacitance detection method is more convenient or more accurate than the signal detection method, the crack detection of the display panel can be judged by detecting the capacitance of the corresponding area of the touch electrode layer 15.

[0076] In summary, based on the connection mode of the switch assembly 11, the touch signal line 12 and the crack detection signal line 13 described in the embodiments of the present application, the crack detection signal line 13 is detected by touch test to realize the crack detection judgment of the display panel. Compared with the prior art, the PCD detection picture can be omitted to realize the purpose of crack detection without point screen. Moreover, since the signal of the touch electrode layer 15 is used for the crack detection judgment of the display panel, the PCD detection circuit of the Array segment can be omitted in design, and the lower frame of the display panel can be saved by 150-300 μm. Moreover, the PCD winding of the Array segment metal layer of the left and right frames and the upper frame is changed into the winding mode of the crack detection signal line 13 of the touch electrode layer, and the left and right frames and the upper frame can be saved by 10-30 μm to realize the extremely narrow frame design.

[0077] Based on the above embodiments of the present application, in another embodiment of the present application, a display device is also provided, which comprises the display panel in any of the above embodiments.

[0078] The display device provided by the embodiments of the present application has the technical effects of the technical solutions of the display panel in any of the above embodiments, and the same or corresponding structures and the explanations of the terms are not described here. The display device provided by the embodiments of the present application can be a mobile phone or any electronic product with display function, including but not limited to the following categories: television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, medical equipment, industrial control equipment, touch interactive terminal, etc., and the embodiments of the present application do not make special limitations on this.

[0079] The display panel, the driving method thereof and the display device provided by the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples in this paper. The above embodiment is only used to help understand the method and the core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed, and the above description should not be understood as a limitation of the present application.

[0080] It should be noted that each embodiment in the present specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts of each embodiment can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0081] It is also noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0082] The above description of disclosed embodiments provides enabling concepts for practicing or using the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that, The display panel includes: a switch assembly, a touch signal line, and a crack detection signal line that is at least partially disposed around the display panel; The first end of the crack detection signal line is electrically connected to the touch signal line through the switch assembly, and the second end of the crack detection signal line is electrically connected to the signal terminal, which is used to provide a second signal. The touch signal line transmits a first signal, and the voltage values ​​of the first signal and the second signal are different. During the crack detection stage, the switch assembly is controlled to be in the conducting state and receives the signal transmitted on the touch signal line; the crack detection judgment of the display panel is performed based on the signal transmitted on the touch signal line. The display panel further includes a touch electrode layer, and the touch signal line is electrically connected to the touch electrode layer; The control terminal of the switch assembly is used to receive control signals, including a first control signal and a second control signal. The first control signal is used to control the switch assembly to be in an open state, and the second control signal is used to control the switch assembly to be in an on state. During the non-crack detection stage, the control terminal of the switch assembly receives the first control signal, and the first signal is transmitted to the touch electrode layer through the touch signal line, and the touch electrode layer is in normal working condition. During the crack detection stage, the control terminal of the switch assembly receives the second control signal. When there is no breakage in the crack detection signal line, the first signal and the second signal are transmitted to the touch electrode layer through the touch signal line, and the touch electrode layer is in an abnormal working state. When there is a breakage in the crack detection signal line, the first signal is transmitted to the touch electrode layer through the touch signal line, and the touch electrode layer is in a normal working state.

2. The display panel according to claim 1, characterized in that, The signal terminal is the ground terminal.

3. The display panel according to claim 1, characterized in that, The touch signal line includes a horizontally arranged touch drive line; The touch drive line transmits a first A signal, and the absolute value of the difference between the voltage value of the first A signal and the voltage value of the second signal is greater than the first voltage value.

4. The display panel according to claim 3, characterized in that, The display panel further includes: a first controller, and the touch driving line is electrically connected to the first controller; The first controller is used to provide the first signal A to the touch drive line.

5. The display panel according to claim 1, characterized in that, The touch signal line includes a vertically arranged touch sensing line; The touch sensing line transmits a first signal B, and the absolute value of the difference between the voltage value of the first signal B and the voltage value of the second signal is greater than the second voltage value.

6. The display panel according to claim 5, characterized in that, The display panel further includes: a second controller, and the touch sensing line is electrically connected to the second controller; The second controller is used to provide the first signal B to the touch sensing line.

7. The display panel according to any one of claims 1-6, characterized in that, The switching component is a thin-film transistor.

8. A driving method for a display panel, characterized in that, Applied to the display panel according to any one of claims 1-7, the driving method of the display panel includes: During the non-crack detection phase, the switching assembly is controlled to be in the off state; During the crack detection stage, the switch assembly is controlled to be in the on state and receives the signal transmitted on the touch signal line; the crack detection judgment of the display panel is performed based on the signal transmitted on the touch signal line.

9. A display device, characterized in that, The display device includes the display panel as described in any one of claims 1-7.

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