Patent ID: 11864415
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 18:
19. A preparation method for a display panel, comprising:
forming a drive structure layer on a substrate;
forming a light-emitting structure layer on the drive structure layer, wherein the light-emitting structure layer comprises a plurality of first light-emitting elements;
forming a thin film encapsulation layer covering the light-emitting structure layer;
forming a light extraction structure layer on the thin film encapsulation layer, wherein the light extraction structure layer comprises a plurality of first collimating light extraction elements and a plurality of second collimating light extraction elements; wherein each first collimating light extraction element is located in a second light-emergence direction of the first light-emitting element corresponding to the first collimating light extraction element; each second collimating light extraction element is located in a third light-emergence direction of the first light-emitting element corresponding to the second collimating light extraction element;
forming a low-refractive-index reflecting layer covering the light extraction structure layer; and
forming a color filter layer on the low-refractive-index reflecting layer, wherein the color filter layer comprises a plurality of first filter units, a plurality of second filter units and a plurality of third filter units; wherein each first filter unit is located in a first light-emergence direction of the first light-emitting element corresponding to the first filter unit; each second filter unit is located in a light-emergence direction of the first collimating light extraction element corresponding to the second filter unit; and each third filter unit is located in a light-emergence direction of the second collimating light extraction element corresponding to the third filter unit.