Light-emitting substrate and display device

A light-emitting substrate, comprising:

• a base substrate;
• a reflective layer arranged on the base substrate, wherein the reflective layer comprises an opening, and a maximum size of the opening in a first direction is H1;
• at least one pad, wherein an orthographic projection of the at least one pad on the base substrate at least partially overlaps with an orthographic projection of the opening on the base substrate;
• a light-emitting element arranged on the base substrate, wherein an orthographic projection of the light-emitting element on the base substrate at least partially overlaps with the orthographic projection of the opening on the base substrate, and the light-emitting element comprises a first electrode and a second electrode;
• and
• a connecting portion arranged between the at least one pad and the light-emitting element and configured to connect the at least one pad and the light-emitting element, wherein the connecting portion comprises an edge radian region, and a maximum size of the edge radian region in the first direction is M;
• wherein
• the first electrode and the second electrode are arranged at intervals in a second direction, the second direction intersects with the first direction, and a maximum size of the first electrode or the second electrode in the first direction is a first size K1;
• and
• the at least one pad comprises a first pad, the first pad comprises a first size portion, a minimum distance between the first size portion and the opening in the first direction is a second size K2, and the second size K2 satisfies:
• K2≤0.5H1−0.5 (K1+2M), and 50 μm≤H1−2K2−K1≤100 μm.