Display substrate and display device

A display substrate, comprising:

• a base substrate and a plurality of sub-pixels arranged on the base substrate, wherein at least part of the plurality of sub-pixels comprise an organic light emitting element and a pixel circuit for driving the organic light emitting element to emit light, the organic light emitting element comprises a first electrode, a light emitting layer and a second electrode which are stacked, the second electrode of the organic light emitting element is located between the light emitting layer and the base substrate, the second electrode of the organic light emitting element is electrically connected to the pixel circuit, the pixel circuit comprises a plurality of transistors, the plurality of sub-pixels are arranged along a first direction or a second direction, and the first direction is intersected with the second direction;
• an active semiconductor layer, comprising channels, source regions and drain regions of the plurality of transistors;
• a first conductive layer, located on a side of the active semiconductor layer away from the base substrate;
• a second conductive layer, located on a side of the first conductive layer away from the base substrate;
• a source-drain metal layer, located on a side of the second conductive layer away from the base substrate;
• and
• a third conductive layer, located on a side of the source-drain metal layer away from the base substrate,
• wherein the source-drain metal layer comprises a first power signal line, and the third conductive layer comprises a second power signal line;
• the display substrate further comprises reset power signal lines, the reset power signal lines comprise a first reset power signal line and a second reset power signal line;
• the first reset power signal line and the second reset power signal line are electrically connected to the pixel circuit and configured to provide a reset signal;
• and the first power signal line and the second power signal line are electrically connected to the pixel circuit.