US 12,016,201 B2
Display device
Jae Ik Lim, Hwaseong-si (KR); Chaun Gi Choi, Suwon-si (KR); and Sang Woo Kim, Seoul (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Appl. No. 17/310,708
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
PCT Filed Dec. 31, 2019, PCT No. PCT/KR2019/018818
§ 371(c)(1), (2) Date Aug. 18, 2021,
PCT Pub. No. WO2020/171370, PCT Pub. Date Aug. 27, 2020.
Claims priority of application No. 10-2019-0019338 (KR), filed on Feb. 19, 2019.
Prior Publication US 2022/0165994 A1, May 26, 2022
Int. Cl. G06F 3/044 (2006.01); H01L 27/32 (2006.01); H01L 51/52 (2006.01); H10K 50/858 (2023.01); H10K 59/12 (2023.01); H10K 59/40 (2023.01)
CPC H10K 50/858 (2023.02) [G06F 3/0445 (2019.05); H10K 59/12 (2023.02); H10K 59/40 (2023.02)] 18 Claims
OG exemplary drawing
 
1. A display device comprising:
a substrate;
a light-emitting element on the substrate;
a planarization layer on the light-emitting element;
a first refractive index layer outside a light emission region of the light-emitting element on the planarization layer and including a total reflection inclination surface totally reflecting light emitted from the light-emitting element in a front direction and a refraction inclination surface refracting light emitted from the light-emitting element in the front direction;
a second refractive index layer outside the light emission region of the light-emitting element, wherein the second refractive index layer is adjacent to and extends over a portion of the first refractive index layer to be in contact with the refraction inclination surface and having a smaller refractive index than a refractive index of the first refractive index layer; and
a third refractive index layer on the first refractive index layer and the second refractive index layer to be in contact with the total reflection inclination surface and having a larger refractive index than the refractive index of the first refractive index layer.