Display substrate, manufacturing method thereof, and display device

A display substrate comprising a scan driving circuit and a display area provided on a base substrate, wherein the scan driving circuit includes a plurality of shift register units, and at least one of the plurality of shift register units includes a signal output line and an output circuit, and the output circuit includes an output transistor and an output reset transistor;

• the signal output line includes a first output line portion extending in a first direction;
• the first output line portion is coupled to a second electrode of the output transistor through a plurality of first signal line via holes arranged in a signal line overlap area, and the first output line portion is coupled to a second electrode of the output reset transistor through a plurality of second signal line via holes arranged in the signal line overlap area;
• the plurality of first signal line via holes is arranged in sequence along the first direction, and the plurality of second signal line via holes is arranged in sequence along the first direction;
• the signal line overlap area includes a first signal line overlap area and a second signal line overlap area, and the first signal line overlap area is an overlap area between an orthographic projection of the first output line portion on the base substrate and an orthographic projection of a first source-drain metal pattern on the base substrate, the second electrode of the output transistor is included in the first source-drain metal pattern, the second signal line overlap area is an overlap area between the orthographic projection of the first output line portion on the base substrate and the orthographic projection of a second source-drain metal pattern on the base substrate, the second electrode of the output reset transistor is included in the second source-drain metal pattern;
• a ratio of a maximum distance in the first direction between any two first signal line via holes arranged in sequence along the first direction to a third length is a first predetermined ratio;
• a minimum distance in the first direction between two adjacent first signal line via holes is a first predetermined distance;
• the third length is a length of the first single line overlap area in the first direction;
• a ratio of a maximum distance in the first direction between any two second signal line via holes arranged in sequence along the first direction to a fourth length is a second predetermined ratio;
• a minimum distance in the first direction between two adjacent second signal line via holes is a second predetermined distance;
• the fourth length is a length of the second signal line overlap area in the first direction;
• the first predetermined ratio is greater than or equal to 0.05 and less than or equal to 0.9;
• the first predetermined distance is greater than or equal to 1.5 um and less than or equal to 45 um;
• the second predetermined ratio is greater than or equal to 0.05 and less than or equal to 0.9;
• the second predetermined distance is greater than or equal to 1.5 um and less than or equal to 65 um.