US 11,818,916 B2
Display device comprising stack of insulating refractive layers
Woongsik Kim, Hwaseong-si (KR); Ji-Hyun Kim, Hwaseong-si (KR); Saehee Han, Seoul (KR); and Jongbeom Hong, Seongnam-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Nov. 21, 2022, as Appl. No. 17/991,344.
Application 17/991,344 is a division of application No. 16/886,039, filed on May 28, 2020, granted, now 11,527,740.
Claims priority of application No. 10-2019-0079385 (KR), filed on Jul. 2, 2019.
Prior Publication US 2023/0088397 A1, Mar. 23, 2023
Int. Cl. H10K 50/858 (2023.01); H10K 59/12 (2023.01)
CPC H10K 50/858 (2023.02) [H10K 59/12 (2023.02)] 8 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel including a plurality of light emitting regions and a non-light emitting region adjacent to the plurality of light emitting regions;
a first insulation layer disposed on the display panel, the first insulation layer having a first refractive index, and having a first opening overlapping the non-light emitting region;
a second insulation layer covering the display panel and the first insulation layer and having a second refractive index less than the first refractive index of the first insulation layer;
a third insulation layer disposed on the second insulation layer, the third insulation layer having the first refractive index, and having a second opening overlapping the non-light emitting region; and
a fourth insulation layer covering the second insulation layer and the third insulation layer and having the second refractive index.