Display panel and display device

A display device, comprising:

• a display panel:
• wherein the display panel comprises a display area and a peripheral area surrounding the display area, the peripheral area comprises a first peripheral area located at a side of the display area, the first peripheral area has a cell test area for arranging a cell test unit, the display panel has a first edge, and the first edge is located at a side of the first peripheral area away from the display area;
• wherein the display panel is provided with a reference power bus and a touch signal line, and in the first peripheral area, the reference power bus has a reference power bus protrusion, and an orthographic projection of the reference power bus protrusion on the first edge is located within an orthographic projection of the cell test area on the first edge, and at least part of the touch signal line overlaps with the reference power bus protrusion.