Display panel and display device

A display device, comprising a display panel, wherein the display panel comprises a substrate, a display region, and a non-display region, wherein the display region comprises a plurality of data lines, and the non-display region comprises a demultiplexing circuit, a fanout wire, and a clock signal line;

• an input terminal of the demultiplexing circuit is electrically connected to the fanout wire, an output terminal of the demultiplexing circuit is electrically connected to a data line of the data lines, and a control terminal of the demultiplexing circuit is electrically connected to the clock signal line;
• and
• the display panel further comprises an isolation signal line, the isolation signal line comprises an isolation portion, and an orthographic projection of the isolation portion on a plane in which the substrate is located is between an orthographic projection of the clock signal line on the plane in which the substrate is located and an orthographic projection of the fanout wire on the plane in which the substrate is located;
• wherein the isolation signal line comprises a display test signal line, and the display test signal line comprises at least one of a display test switch signal line and a display test data signal line.