Display substrate having a varying width power supply wire, display panel and display device having the same

A display substrate, comprising:

• a base substrate comprising a display region and a non-display region, wherein the display region comprises a display pixel, and the non-display region surrounds at least a part of the display region;
• a pixel circuit comprising a power supply wire, wherein the power supply wire is configured to provide a power supply voltage to the display pixel;
• and
• a drive circuit at least partially in the non-display region, and comprising a drive signal wire, wherein the drive signal wire is configured to provide a drive signal to the pixel circuit;
• the power supply wire comprises a narrow wire portion and a wide wire portion connected to the narrow wire portion, an orthographic projection of the narrow wire portion on the base substrate at least partially overlaps with an orthographic projection of the drive signal wire on the base substrate, and a wire width of the narrow wire portion is less than a wire width of the wide wire portion;
• the display substrate has a first side for display and a second side opposite to the first side, and comprises a bending region at an edge of the base substrate, and the power supply wire and the drive signal wire extend from the first side to the bending region and cross the bending region to further extend to the second side;
• and
• the narrow wire portion of the power supply wire is at least on the second side of the display substrate;
• a part of the power supply wire at a side of the bending region away from the display region is in a shape of a strip extending along a longitudinal direction, and both the narrow wire portion and the wide wire portion extend along the longitudinal direction;
• the bending region is in a shape of a strip extending along a transverse direction, and the longitudinal direction intersects the transverse direction.