Patent ID: 11877472
Assignee: WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 9:
10. A display device, comprising an organic light-emitting diode (OLED) display panel, wherein the OLED display panel comprises:
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.