Display substrate and display device

A display substrate, comprising:

• a base substrate;
• a first signal line extending along a first direction as a whole and a second signal line extending along a second direction as a whole on the base substrate, wherein the first direction intersects the second direction;
• a sub-pixel, wherein the sub-pixel comprises a pixel circuit, and the pixel circuit comprises:
• a light emitting device, a driving transistor and a data writing transistor, wherein
• the data writing transistor is configured to transmit a data signal to the driving transistor under a control of a first scan signal;
• the driving transistor is configured to control a magnitude of a driving current flowing through the light emitting device according to the data signal, the driving transistor comprises an active pattern and a gate electrode, the active pattern comprises a channel region, and an orthographic projection of the channel region on the base substrate at least partially overlaps with an orthographic projection of the gate electrode on the base substrate;
• the light emitting device is configured to receive the driving current and is driven by the driving current to emit light;
• the pixel circuit further comprises a storage capacitor, and the storage capacitor comprises:
• a first electrode plate, a planar pattern of the first electrode plate is in an L shape, and the first electrode plate and the gate electrode of the driving transistor are disposed in the same layer and have an integral structure.