Patent ID: 11882726
Assignee: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 11:
12. A manufacturing method of an OLED display panel, comprising:
forming, on a first side of a base plate, an OLED device layer which has a plurality of OLED light-emitting devices and comprises a first electrode layer, a plurality of electroluminescent layers of the plurality of OLED light-emitting devices on the first electrode layer and a second electrode layer on the plurality of electroluminescent layers, wherein the second electrode layer has a plurality of second hollow-out regions;
forming an encapsulation layer to encapsulate the first side of the base plate and cover the plurality of OLED light-emitting devices;
forming, on the encapsulation layer, a color filter layer which comprises: a black matrix defining a plurality of openings, and a plurality of color filters in the plurality of openings, respectively, spaced apart from one another by the black matrix and corresponding to the plurality of OLED light-emitting devices, respectively, wherein a plurality of light-transmitting holes are arranged in the black matrix; and
forming a plurality of photosensitive fingerprint sensors on a second side of the base plate,
wherein respective orthographic projections of the plurality of light-transmitting holes, the plurality of second hollow-out regions and the plurality of photosensitive fingerprint sensors on the base plate at least partially overlap with one another;
wherein the forming the OLED device layer on the first side of the base plate comprises:
forming, on the base plate, the first electrode layer which comprises a plurality of discrete first electrodes for the plurality of OLED light-emitting devices;
forming, on the plurality of discrete first electrodes, a pixel definition layer to define a plurality of sub-pixel regions of the plurality of OLED light-emitting devices and expose the plurality of discrete first electrodes;
forming the plurality of electroluminescent layers on the plurality of discrete first electrodes; and
forming the second electrode layer on the pixel definition layer and the plurality of electroluminescent layers such that respective orthographic projections of the plurality of second hollow-out regions of the second electrode layer on the base plate are in an orthographic projection of the pixel definition layer on the base plate; and
wherein the forming the second electrode layer on the pixel definition layer and the plurality of electroluminescent layers comprises:
forming a plurality of transparent organic material layers at respective positions corresponding to the plurality of second hollow-out regions on the pixel definition layer, respectively; and
forming a second electrode material layer on the pixel definition layer and the plurality of electroluminescent layers to form the second electrode layer which comprises the plurality of transparent organic material layers at the respective positions corresponding to the plurality of second hollow-out regions and a second electrode material outside the respective positions corresponding to the plurality of second hollow-out regions.