Display panel, crack detection method therefor, and display device

A display panel, comprising a display region and a peripheral region surrounding the display region, wherein at least one first data line and at least one second data line are arranged in the display region, a crack detection circuit structure is arranged in the peripheral region, the crack detection circuit structure comprises a first crack detection line, a second crack detection line, a first detection switch circuit electrically connected with the first data line, and a second detection switch circuit electrically connected with the second data line, the display panel comprises multiple function layers sequentially arranged on a plane perpendicular to a display surface of the display panel, and the first crack detection line and the second crack detection line are arranged in different function layers, wherein

• a first terminal of the first crack detection line is configured to be electrically connected with a first test terminal, a second terminal of the first crack detection line is electrically connected with an input terminal of the first detection switch circuit, and an output terminal of the first detection switch circuit is electrically connected with the first data line;
• a first terminal of the second crack detection line is electrically connected with a third node of the first crack detection line, the third node is different from the first terminal and the second terminal of the first crack detection line, a second terminal of the second crack detection line is electrically connected with an input terminal of the second detection switch circuit, and an output terminal of the second detection switch circuit is electrically connected with the second data line;
• and
• a control terminal of the first detection switch circuit and a control terminal of the second detection switch circuit are configured to be electrically connected with a second test terminal;
• wherein the peripheral region comprises a first region with a bonding region, a second region arranged opposite to the first region, and a third region and a fourth region that are connected with the first region and the second region and arranged opposite to each other;
• the first terminal and the second terminal of the first crack detection line are located in the first region;
• the first crack detection line is located in the first region, the second region, and the third region;
• and
• the first terminal of the second crack detection line is located in the second region, the second terminal of the second crack detection line is located in the first region, and the second crack detection line is located in the first region, the second region, and the third region.