US 11,877,472 B2
Organic light-emitting diode display panel having coupling layer with different thicknesses and display device
Jiajia Sun, Hubei (CN)
Assigned to WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Hubei (CN)
Appl. No. 16/980,036
Filed by WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Hubei (CN)
PCT Filed Jul. 24, 2020, PCT No. PCT/CN2020/104022
§ 371(c)(1), (2) Date Sep. 11, 2020,
PCT Pub. No. WO2022/000639, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 202010631559.X (CN), filed on Jul. 3, 2020.
Prior Publication US 2023/0098776 A1, Mar. 30, 2023
Int. Cl. H10K 50/852 (2023.01); H10K 71/00 (2023.01); H10K 102/00 (2023.01)
CPC H10K 50/852 (2023.02) [H10K 71/00 (2023.02); H10K 2102/351 (2023.02)] 18 Claims
OG exemplary drawing
 
1. An organic light-emitting diode (OLED) display panel, comprising:
a substrate;
a driving circuit layer disposed on the substrate;
a luminous functional layer disposed on the driving circuit layer and comprising a red-light material layer, a green-light material layer, and a blue-light material layer;
a light coupling layer disposed on the luminous functional layer and comprising a first coupling layer and a second coupling layer, wherein the second coupling layer is disposed on a side of the first coupling layer away from the luminous functional layer; and
an encapsulation layer disposed on the light coupling layer,
wherein the second coupling layer comprises a first coupling portion, a second coupling portion, and a third coupling portion, the first coupling portion is disposed above the red-light material layer, the second coupling portion is disposed above the green-light material layer, the third coupling portion is disposed above the blue-light material layer, a thickness of the first coupling portion is greater than or equal to a thickness of the second coupling portion, the thickness of the second coupling portion is greater than or equal to a thickness of the third coupling portion, and the thickness of the first coupling portion is greater than the thickness of the third coupling portion, and
wherein a refractive index of the second coupling layer is less than a refractive index of the first coupling layer.