US 12,408,538 B2
Anti-peeping display device
Yong Seok Kim, Seoul (KR); Youngchan Kim, Incheon (KR); Jeongwoo Park, Yongin-si (KR); Minhee Son, Anyang-si (KR); Saet Byeol Shin, Cheonan-si (KR); and Byeong-Hee Won, Incheon (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-Si (KR)
Filed on Jun. 29, 2022, as Appl. No. 17/852,644.
Claims priority of application No. 10-2021-0134936 (KR), filed on Oct. 12, 2021.
Prior Publication US 2023/0113976 A1, Apr. 13, 2023
Int. Cl. H10K 50/858 (2023.01); H10K 50/854 (2023.01); H10K 50/86 (2023.01); H10K 59/50 (2023.01)
CPC H10K 50/858 (2023.02) [H10K 50/854 (2023.02); H10K 50/865 (2023.02); H10K 59/50 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A display device comprising:
a substrate including a display area including a light emitting area and a light blocking area, and a peripheral area surrounding at least a portion of the display area;
a first light emitting element disposed in the light emitting area on the substrate and emitting a first light;
a light guide layer disposed on the first light emitting element to cover the display area and the peripheral area, and transmitting a second light incident from the peripheral area to the display area;
a first low refractive layer disposed on the light guide layer and having a refractive index smaller than a refractive index of the light guide layer;
a second low refractive layer disposed under the light guide layer and having a refractive index smaller than a refractive index of the light guide layer; and
a first light control layer disposed on the first low refractive layer and having a first opening exposing the light emitting area,
wherein the first light control layer includes a photochromic material that is discolored by the second light.