Patent ID: 11882729
Assignee: HEFEI BOE JOINT TECHNOLOGY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A display substrate having a display area provided with a plurality of sub-pixels, the display substrate comprising:
a base;
power lines; and
a pixel driving circuit and a bottom-emission light-emitting device that are disposed on the base and located in each sub-pixel in the display area; the light-emitting device including a first electrode electrically connected to the pixel driving circuit; and the pixel driving circuit including a first storage capacitor and a second storage capacitor connected in parallel; wherein
the first storage capacitor includes a first storage electrode and a second storage electrode that are disposed oppositely; and the first electrode serves as the first storage electrode;
the second storage capacitor includes the second storage electrode and a third storage electrode disposed opposite to the second storage electrode;
the second storage electrode is located between the first storage electrode and the third storage electrode in a thickness direction of the base; and the first storage electrode is electrically connected to the third storage electrode;
the first electrode, the second storage electrode, and the third storage electrode are all transparent electrodes;
wherein the pixel driving circuit further includes a first transistor; the first transistor includes a first gate, a first semiconductor active pattern, and a first source, and the first transistor is a driving transistor;
the first semiconductor active pattern includes a first channel portion, a first source portion, and a first drain portion, and electrical conductivities of the first source portion and the first drain portion are greater than an electrical conductivity of the first channel portion; the first source is in contact with the first source portion, and electrically connected to a power line; and
the third storage electrode is a semiconductor pattern that has undergone a conducting processing, the third storage electrode and the first drain portion are connected to each other, and are of an integral structure.