US 12,464,891 B2
Display panel and on-board display apparatus
Yuchun Zhang, Beijing (CN); and Shudong Zhong, Beijing (CN)
Assigned to BEIJING ZENITHNANO TECHNOLOGY CO., LTD., Beijing (CN)
Filed by BEIJING ZENITHNANO TECHNOLOGY CO., LTD., Beijing (CN)
Filed on Jan. 9, 2023, as Appl. No. 18/151,830.
Application 18/151,830 is a continuation of application No. PCT/CN2021/123152, filed on Oct. 12, 2021.
Claims priority of application No. 202111096404.1 (CN), filed on Sep. 16, 2021.
Prior Publication US 2023/0165043 A1, May 25, 2023
Int. Cl. H10K 50/858 (2023.01); B60K 35/22 (2024.01); B60K 35/40 (2024.01); H10K 50/844 (2023.01)
CPC H10K 50/858 (2023.02) [B60K 35/22 (2024.01); B60K 35/425 (2024.01); H10K 50/844 (2023.02)] 10 Claims
OG exemplary drawing
 
1. A display panel, comprising:
a first electrode layer;
an emissive layer group provided on the first electrode layer;
a light extraction layer provided on the emissive layer group, the light extraction layer being in a light emission direction of the display panel and serving as a second electrode layer; and
an encapsulation layer provided on the light extraction layer;
wherein a refractive index of the light extraction layer is smaller than that of the encapsulation layer;
wherein the light extraction layer comprises:
a first conductive layer in contact with the emissive layer group;
a first protective layer in contact with the first conductive layer;
a second conductive layer in contact with the first protective layer;
a second protective layer in contact with the second conductive layer; and
a light-exiting layer in contact with the second protective layer;
wherein the first conductive layer has a first refractive index n1 and a first thickness d1, the first protective layer has a second refractive index n2 and a second thickness d2, the second conductive layer has a third refractive index n3 and a third thickness d3, the second protective layer has a fourth refractive index n4 and a fourth thickness d4, and the light-exiting layer has a fifth refractive index n5 and a fifth thickness d5; and
wherein n1 is between 1.8 and 2.1, and d1 is between 20 nm and 80 nm; n2 is between 0.1 and 5, and d2 is between 0.5 nm and 10 nm; n3 is between 0.1 and 1.5, and d3 is between 5 nm and 50 nm; n4 is between 1.3 and 2.1, and d4 is between 0.5 nm and 10 nm; n5 is between 1.8 and 2.4, and d5 is between 20 nm and 80 nm.