Display substrate comprising circuit and dam isolation regions, manufacturing method thereof, and display apparatus including the display substrate

A display substrate, comprising a display area and an edge area located on a side of the display area, the display substrate comprising a substrate and a power supply line arranged on the substrate and located in the edge area, wherein:

• the power supply line comprises a first power supply portion and a second power supply portion connected with each other, and the second power supply portion is located on a side of the first power supply portion away from the substrate;
• the display area comprises a plurality of display units, wherein at least one display unit of the plurality of display units comprises a pixel driving circuit and a light emitting device, wherein the pixel driving circuit is electrically connected with an anode of the light emitting device, and the power supply line is electrically connected with a cathode of the light emitting device;
• an orthographic projection of the second power supply portion on the substrate is at least partially overlapped with an orthographic projection of the first power supply portion on the substrate, and a distance between an end of the second power supply portion away from the display area and the display area is greater than or equal to a distance between an end of the first power supply portion away from the display area and the display area;
• the edge area comprises a circuit region and an isolation dam region sequentially arranged in a direction away from the display area, the circuit region comprising a first circuit region, a second circuit region and a third circuit region sequentially arranged in a direction away from the display area;
• the pixel driving circuit comprises a writing transistor, a compensation transistor, a light emitting transistor, a first scan signal line, a second scan signal line and a light emitting signal line;
• the first scan signal line is electrically connected to a control electrode of the writing transistor, the second scan signal line is electrically connected to a control electrode of the compensation transistor, and the light emitting signal line is electrically connected to a control electrode of the light emitting transistor;
• and the writing transistor and the compensation transistor have different transistor types;
• the display substrate further comprises a first driving circuit located in the first circuit region, a second driving circuit located in the second circuit region, and a third driving circuit located in the third circuit region and the isolation dam region;
• the first driving circuit is electrically connected with the first scan signal line, the second driving circuit is electrically connected with the second scan signal line, and the third driving circuit is electrically connected with the light emitting signal line;
• the first power supply portion is located in the isolation dam region, and the second power supply portion is located in the isolation dam region and the circuit region;
• and
• an orthographic projection of the second power supply portion on the substrate is at least partially overlapped with an orthographic projection of the third driving circuit on the substrate, and there is no overlapping area between the orthographic projection of the second power supply portion on the substrate and an orthographic projection of the second driving circuit on the substrate.