Patent ID: 11903268
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 12:
13. A preparation method for a display substrate, comprising:
forming a drive structure layer on a substrate, wherein the drive structure layer comprises a pixel drive circuit;
forming a light-emitting element on the drive structure layer, wherein the light-emitting element comprises a first electrode, an organic functional layer and a second electrode which are stacked on the drive structure layer, and the first electrode is connected with the pixel drive circuit; and
forming a light detection unit on the light-emitting element wherein the light detection unit is disposed in a direction of light-emitting of the light-emitting element, to detect brightness of the light-emitting element, and the light detection unit comprises a third electrode, a photosensitive active layer and a fourth electrode which are stacked;
wherein the display substrate further comprises a capping layer, and forming the light detection unit on the light-emitting element comprises:
forming the capping layer on the second electrode;
forming the third electrode of the light detection unit on the capping layer, wherein the third electrode of the light detection unit is an integrated structure for different pixel units and connected with a low voltage line in a peripheral region of the display substrate;
forming the photosensitive active layer on the third electrode; and
forming the fourth electrode on the photosensitive active layer.