Display panel, driving method thereof and display device

Abstract

The invention provides a display panel, a driving method thereof and a display device, and relates to the technical field of display. Based on the connection mode of the switch assembly, the touch signal line and the crack detection signal line, the fracture condition of the crack detection signal line can be detected through a touch test, so that crack detection judgment of the display panel is realized. Compared with the prior art, a PCD detection picture can be omitted, the wiring layout is simplified, the design of an extremely narrow frame is realized, and the purpose of crack detection can be realized without touching a screen is realized.

Description

Technical Field

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

[0002] With the rapid development of display technology, the border design of display panels has become narrower and narrower. Abnormalities in various manufacturing process stages of display panels will cause screen cracks, and there is a high risk of adverse effects such as black spots or abnormal display. Therefore, it is very important to identify screen cracks in a timely manner through panel crack detection (PCD) technology.

[0003] The existing crack detection circuit requires the screen to detect cracks, which requires the addition of a PCD detection circuit and multiple signal windings, limiting the design of an extremely narrow frame. In addition, the method of PCD detection by the screen will increase production time and affect production capacity. Summary of the invention

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

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

[0006] 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 end, and the signal end is used to provide a second signal;

[0007] Wherein, a 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 component is controlled to be in an on state, and a signal transmitted on the touch signal line is received; and crack detection and judgment of the display panel are performed based on the signal transmitted on the touch signal line.

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

[0010] In the non-crack detection stage, controlling the switch component to be in an off state;

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

[0012] A third aspect of the present application provides a display device, which includes the display panel described above.

[0013] By means of the above technical solution, the present application provides a display panel and a driving method thereof, and a display device. Based on the connection method of the switch component, the touch signal line, and the crack detection signal line, the breakage of the crack detection signal line can be detected by the touch test to realize the crack detection judgment of the display panel. Compared with the prior art, the PCD detection screen can be omitted, the wiring layout is simplified, an extremely narrow frame design is realized, and the purpose of crack detection can be realized without touching the screen. BRIEF DESCRIPTION OF THE 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 accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to 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 schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

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

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

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

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

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

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

[0023] Fig. 9A schematic flow chart of a method for driving a display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application. The terms used in the implementation mode 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 with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

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

[0026] Based on the content of the background technology, refer to Figure 1 , Figure 1 The schematic diagram is a principle diagram of a crack detection technology for a display panel in the prior art. It is found in the invention process of the present application that: Figure 1 In the prior art, a display panel crack detection technology is shown. The PCD_IN_VGH line will go around the display panel once and then be electrically connected to the PCD line above the display panel. The PCD_IN_VGH line is not connected to the VGH signal line in the surface. It should be noted that the normal VT is VGH potential, and it is NC when the module does not provide a signal.

[0027] During PCD detection, the PCD_SW signal is low level, and the PCD_IN_VGH signal and PCD signal are high level. When the PCD line is broken, the pixels in the PCD detection column light up, and the pixels in other columns do not light up; otherwise, all pixels are off.

[0028] That is to say, Figure 1 The prior art of crack detection technology for a display panel requires the screen to be dotted for crack detection. A PCD detection screen needs to be added during PCD detection. In terms of design, a new PCD detection circuit and multiple signal windings need to be added, resulting in the limitation of the extremely narrow frame design. In addition, the method of PCD detection by dotted screen will increase production time and affect production capacity.

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

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

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

[0032] refer to Figure 2 , Figure 2 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention. The display panel provided by an embodiment of the present invention comprises: a switch assembly 11, a touch signal line 12, and a crack detection signal line 13 at least partially arranged around the display panel.

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

[0034] The touch signal line 12 transmits a first signal, and the voltage values ​​of the first signal and the second signal are different.

[0035] In the crack detection stage, the switch assembly 11 is controlled to be in an on state, and receives the signal transmitted on the touch signal line 12 ; and the crack detection judgment of the display panel is performed based on the signal transmitted on the touch signal line 12 .

[0036] Specifically, in the embodiment of the present invention, the number of circles of the crack detection signal line 13 around the display panel is not limited in the embodiment of the present invention and can be determined according to actual conditions.

[0037] like Figure 2 As shown, the display panel is a display panel with a touch function, and the display panel includes a touch electrode layer 15, the touch electrode layer 15 is arranged on one side of the substrate in the display panel, the touch signal line 12 is electrically connected to 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] like Figure 2 As shown, the control end 16 of the switch component 11 is used to receive a control signal; the control signal is used to control the switch component 11 to be in an on state or an off state.

[0039] In the non-crack detection stage, a first control signal is sent to the control terminal 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 value of the area corresponding to the touch signal line 12 in the touch electrode layer 15 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 the on 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 first signal and the second signal being short-circuited. The touch signal line 12 transmits the first signal and the second signal. At this time, the first signal is interfered by the second signal, and the touch electrode layer 15 is in an abnormal working state. The capacitance of the area corresponding to the touch signal line 12 in the touch electrode layer 15 is low or the capacitance exceeds the specification.

[0041] It can be seen that based on the connection method of the switch assembly 11, the touch signal line 12, and the crack detection signal line 13 described in the embodiment of the present application, the crack detection judgment of the display panel can be performed by detecting the signal transmitted on the touch signal line 12.

[0042] Alternatively, in an optional embodiment of the present invention, the crack detection and judgment of the display panel may also be performed by detecting the capacitance of the corresponding area of ​​the touch electrode layer 15 .

[0043] Since 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 inevitably change. Therefore, when the signal detection means is more convenient or more accurate than the capacitance detection means, the crack detection and judgment of the display panel can be performed by detecting the signal transmitted on the touch signal line 12. When the capacitance detection means is more convenient or more accurate than the signal detection means, the crack detection and judgment of the display panel can be performed by detecting the capacitance of the corresponding area of ​​the touch electrode layer 15.

[0044] In summary, based on the connection method of the switch assembly 11, the touch signal line 12, and the crack detection signal line 13 described in the embodiment of the present application, the breakage of the crack detection signal line 13 can be detected through a touch test to realize the crack detection judgment of the display panel. Compared with the prior art, the PCD detection screen can be omitted, and the purpose of crack detection can be achieved without touching the screen. And because the signal of the touch electrode layer 15 is used to detect and judge the crack of the display panel, the PCD detection circuit of the Array segment can be omitted in the design, and the lower frame of the display panel can save 150μm-300μm. And the PCD winding of the metal layer of the Array segment of the left and right frames and the upper frame is changed to the winding method of the crack detection signal line 13 of the touch electrode layer, and the left and right frames and the upper frame can save 10μm-30μm, realizing an extremely narrow frame design.

[0045] In an optional embodiment of the present invention, reference Figure 3 , Figure 3 A schematic diagram of another display panel provided in an embodiment of the present invention. In the embodiment of the present invention, the switch component 11 is a thin film transistor Q.

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

[0047] It should be noted that in the embodiment of the present invention, only one thin film transistor Q is used as the switch component 11 for illustration. The switch component 11 provided in the embodiment of the present invention may also be in other circuit forms, which is not limited in the embodiment of the present invention.

[0048] Comparison Figure 1 and Figure 3 For the structure shown, Figure 3 The solution shown omits the conventional PCD detection circuit at the bottom frame of the display panel, and only needs to design the switch component 11, thereby realizing an extremely narrow frame design.

[0049] In an optional embodiment of the present invention, reference Figure 4 , Figure 4 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention. In the embodiment of the present invention, the signal terminal 14 is a ground terminal GND.

[0050] Specifically, in the embodiment of the present invention, considering that there are a large number of ground terminals GND in the display panel and they are distributed in various areas, it is obvious that electrically connecting the second end of the crack detection signal line 13 to the ground terminal GND can allow the connection point of the second end of the crack detection signal line 13 to have more options, thereby allowing the second end of the crack detection signal line 13 to stay in more areas where it is desired to stay, thereby achieving different degrees of winding design and simplifying the difficulty of wiring.

[0051] The touch electrode layer includes a plurality of touch drive lines (Tx) arranged horizontally and a plurality of touch sensing lines (Rx) arranged vertically. During the touch point positioning detection process, the touch drive lines are scanned row by row. When scanning each touch drive line, the signals on all touch sensing lines are read. By scanning the touch sensing lines column by column, the intersection of each touch drive line and each touch sensing line can be scanned, so that the position of the touch point during 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 that of the pixel unit. Generally, multiple pixel units constitute a touch unit, each row of touch units corresponds to a touch drive line, and each column of touch units corresponds to a touch sensing line.

[0052] In an optional embodiment of the present invention, reference Figure 5 , Figure 5 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention, referring to Figure 6 , Figure 6 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention. In the embodiment of the present invention, the touch signal line 12 includes a touch driving line 121 arranged horizontally.

[0053] The touch driving line 121 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. Optionally, the first voltage value ranges from 1.5V to 1.7V.

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

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

[0056] Specifically, in the embodiment of the present invention, the value of the first voltage value can be determined according to actual conditions, as long as it is ensured that the second signal can effectively interfere with the first A signal after being transmitted to the touch driving line 121 .

[0057] like Figure 5As shown, the first end of the crack detection signal line 13 is electrically connected to the touch drive line 121 through the thin film transistor Q, and the second end of the crack detection signal line 13 is electrically connected to 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 to turn on the thin film transistor Q. When the crack detection signal line 13 is broken, the signal at the ground terminal GND and the first A signal cannot be short-circuited, and the capacitance 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 and the first A signal are short-circuited, and the touch drive line 121 transmits the first A signal and the signal at the ground terminal GND. At this time, the first A signal is interfered by the signal at the ground terminal GND, and the touch electrode layer 15 is in an abnormal working state. The capacitance of the area corresponding to the touch drive line 121 in the touch electrode layer 15 is low or the capacitance exceeds the specification.

[0058] Optional, such as Figure 6 As shown, the first controller 17 may provide the first signal A to the touch driving line 121 .

[0059] It should be noted that the first controller 17 may also detect the signal transmitted on the touch driving line 121 , and perform crack detection and judgment on the display panel based on the signal transmitted on the touch driving line 121 .

[0060] In an optional embodiment of the present invention, reference Figure 7 , Figure 7 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention, referring to Figure 8 , Figure 8 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention. In the embodiment of the present invention, the touch signal line 12 includes a touch sensing line 122 arranged vertically.

[0061] The touch sensing line 122 transmits a first B signal, and the absolute value of the difference between the voltage value of the first B signal and the voltage value of the second signal is greater than the 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 for providing the first B signal to the touch sensing line 122 .

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

[0065] like Figure 7 As shown, the first end of the crack detection signal line 13 is electrically connected to the touch sensing line through the thin film transistor Q, and the second end of the crack detection signal line 13 is electrically connected to 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 to turn on the thin film transistor Q. When the crack detection signal line 13 is broken, the signal at the ground terminal GND and the first B signal cannot be short-circuited, and the capacitance 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 and the first B signal are short-circuited, and the touch sensing line 122 transmits the first B signal and the signal at the ground terminal GND. At this time, the first B signal is interfered by the signal at the ground terminal GND, and the touch electrode layer 15 is in an abnormal working state. The capacitance of the area corresponding to the touch sensing line 122 in the touch electrode layer 15 is low or the capacitance exceeds the specification.

[0066] Optional, such as Figure 8 As shown, the first B signal may be provided to the touch sensing line 122 via the second controller 18 .

[0067] It should be noted that the second controller 18 may also detect the signal transmitted on the touch sensing line 122 , and perform crack detection and judgment on the display panel based on the signal transmitted on the touch sensing line 122 .

[0068] Based on the above embodiment of the present invention, another embodiment of the present invention further provides a method for driving a display panel. Fig. 9 , Fig. 9 A schematic flow chart of a method for driving a display panel provided in an embodiment of the present invention. The method for driving a display panel provided in an embodiment of the present invention includes:

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

[0070] S102 : in the crack detection stage, controlling the switch assembly 11 to be in an on state, and receiving a signal transmitted on the touch signal line 12 ; and performing crack detection and judgment on the display panel based on the signal transmitted on the touch signal line 12 .

[0071] Specifically, in the embodiment of the present invention, in the non-crack detection stage, a first control signal is sent to the control terminal 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, the touch electrode layer 15 can be in a normal working state, and the capacitance value of the area corresponding to the touch signal line 12 in the touch electrode layer 15 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 the on 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 first signal and the second signal being short-circuited. The touch signal line 12 transmits the first signal and the second signal. At this time, the first signal is interfered by the second signal, and the touch electrode layer 15 is in an abnormal working state. The capacitance of the area corresponding to the touch signal line 12 in the touch electrode layer 15 is low or the capacitance exceeds the specification.

[0073] It can be seen that based on the connection method of the switch assembly 11, the touch signal line 12, and the crack detection signal line 13 described in the embodiment of the present application, the crack detection judgment of the display panel can be performed by detecting the signal transmitted on the touch signal line 12.

[0074] Alternatively, in an optional embodiment of the present invention, the crack detection and judgment of the display panel may also be performed by detecting the capacitance of the corresponding area of ​​the touch electrode layer 15 .

[0075] Since 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 inevitably change. Therefore, when the signal detection means is more convenient or more accurate than the capacitance detection means, the crack detection and judgment of the display panel can be performed by detecting the signal transmitted on the touch signal line 12. When the capacitance detection means is more convenient or more accurate than the signal detection means, the crack detection and judgment of the display panel can be performed by detecting the capacitance of the corresponding area of ​​the touch electrode layer 15.

[0076] In summary, based on the connection method of the switch assembly 11, the touch signal line 12, and the crack detection signal line 13 described in the embodiment of the present application, the breakage of the crack detection signal line 13 can be detected through a touch test to realize the crack detection judgment of the display panel. Compared with the prior art, the PCD detection screen can be omitted, and the purpose of crack detection can be achieved without touching the screen. And because the signal of the touch electrode layer 15 is used to detect and judge the crack of the display panel, the PCD detection circuit of the Array segment can be omitted in the design, and the lower frame of the display panel can save 150μm-300μm. And the PCD winding of the metal layer of the Array segment of the left and right frames and the upper frame is changed to the winding method of the crack detection signal line 13 of the touch electrode layer, and the left and right frames and the upper frame can save 10μm-30μm, realizing an extremely narrow frame design.

[0077] Based on the above embodiments of the present invention, a display device is provided in another embodiment of the present invention. The display device includes a display panel, and the display panel is the display panel in any of the above embodiments.

[0078] The display device provided in the embodiment of the present invention has the technical effect of the technical solution of the display panel in any of the above embodiments, and the explanation of the structure and terminology that are the same or corresponding to the above embodiments will not be repeated here. The display device provided in the embodiment of the present invention can be a mobile phone, or any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc., and the embodiment of the present invention does not specifically limit this.

[0079] The display panel and its driving method and display device provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

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

[0081] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device that includes a series of elements is inherent to the elements, or also includes elements inherent to these processes, methods, articles or devices. In the absence of further restrictions, the elements defined by the sentence "including a..." do not exclude the presence of other identical elements in the process, method, article or device that includes the elements.

[0082] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: The display panel comprises: a switch assembly, a touch signal line, and a crack detection signal line at least partially arranged 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 end, and the signal end is used to provide a second signal; Wherein, a 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; In the crack detection stage, the switch component is controlled to be in an on state, and a signal transmitted on the touch signal line is received; and crack detection and judgment of the display panel are performed based on the signal transmitted on the touch signal line.

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

3. The display panel according to claim 1, characterized in that: The touch signal line includes a touch drive line arranged horizontally; The touch driving line transmits a first A signal, and an absolute value of a difference between a voltage value of the first A signal and a 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, the touch driving line being electrically connected to the first controller; The first controller is used to provide the first A signal to the touch drive line.

5. The display panel according to claim 1, characterized in that: The touch signal line includes a touch sensing line arranged vertically; A first B signal is transmitted on the touch sensing line, and an absolute value of a difference between a voltage value of the first B signal and a 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, the touch sensing line being electrically connected to the second controller; The second controller is used for providing the first B signal to the touch sensing line.

7. The display panel according to claim 1, characterized in that: The control end of the switch assembly is used to receive a control signal; The control signal is used to control the switch component to be in an on state or in an off state.

8. The display panel according to any one of claims 1 to 7, characterized in that: The switch component is a thin film transistor.

9. A method for driving a display panel, characterized in that: The driving method of the display panel includes: In the non-crack detection stage, controlling the switch component to be in an off state; In the crack detection stage, the switch component is controlled to be in an on state, and a signal transmitted on the touch signal line is received; and crack detection and judgment of the display panel are performed based on the signal transmitted on the touch signal line.

10. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 8.

Images