Patent ID: 11864433
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A display panel, comprising:
a substrate;
a photoelectric sensing structure on a side of the substrate;
a light emitting structure on a side of the photoelectric sensing structure distal to the substrate, and comprising a plurality of light emitting elements, each of which comprises: a first electrode, a light emitting layer, and a second electrode which are successively arranged in a direction distal to the substrate; and
a light path structure between the photoelectric sensing structure and the second electrode, and configured to collimate light which is on a side of the photoelectric sensing structure distal to the substrate and has a propagation direction towards the photoelectric sensing structure; wherein the photoelectric sensing structure and the light emitting structure do not overlap each other or do partially overlap each other in a direction perpendicular to the substrate; and
the light path structure at least partially overlaps the photoelectric sensing structure in the direction perpendicular to the substrate;
wherein the light path structure has a plurality of light transmission channels, the light path structure comprises at least one light shielding layer with a plurality of light transmission holes, which define the plurality of light transmission channels;
wherein the at least one light shielding layer comprises: a first light shielding layer and a second light shielding layer on a side of the first light shielding layer distal to the substrate, and a light transmission layer is provided between the first light shielding layer and the second light shielding layer; the first light shielding layer has first light transmission holes in an array, the second light shielding layer has second light transmission holes in one-to-one correspondence with the first light transmission holes, and the first light transmission hole and a corresponding one of the second light transmission holes define the light transmission channel;
wherein the display panel further comprises a second planarization layer which is on a side of the photoelectric sensing structure distal to the substrate and having a material of a light shielding material; wherein the second planarization layer is multiplexed as the first light shielding layer;
wherein the photoelectric sensing structure comprises a plurality of photoelectric sensors, each of which comprises a third electrode, a photoelectric conversion layer, and a fourth electrode which are arranged successively in a direction distal to the substrate; the display panel further comprises: a driving circuit layer between the substrate and the photoelectric sensing structure, and comprising first transistors electrically connected to the light emitting elements and second transistors electrically connected to the photoelectric sensors; and a drain of the first transistor is electrically connected to the first electrode of a corresponding light emitting element of the light emitting elements, and a drain of the second transistor is electrically connected to the third electrode of a corresponding photoelectric sensor of the photoelectric sensors;
wherein the display panel further comprises a bias voltage line which is on a side of the photoelectric sensing structure distal to the substrate, is electrically connected to the fourth electrode, and is in the same layer as the first electrode; and
a corresponding first light transmission hole of the first light shielding layer at least partially overlaps with an orthographic projection of the fourth electrode on the substrate; the bias voltage line is electrically connected to the fourth electrode by a via arranged in the second planarization layer, and an orthographic projection of the via on the substrate does not overlap with the orthographic projection of the corresponding first light transmission hole on the substrate and does overlap with the orthographic projection of the orthographic projection of the fourth electrode on the substrate.