US 12,137,577 B2
Display device comprising diffraction layer and refraction pattern for controlling viewing angle
Jaeho You, Gwangmyeong-si (KR); Hyun Jin Cho, Seoul (KR); Beomshik Kim, Seoul (KR); and Youngchan Kim, Incheon (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-Si (KR)
Filed on Oct. 14, 2021, as Appl. No. 17/501,995.
Claims priority of application No. 10-2021-0003423 (KR), filed on Jan. 11, 2021.
Prior Publication US 2022/0223824 A1, Jul. 14, 2022
Int. Cl. H10K 50/858 (2023.01)
CPC H10K 50/858 (2023.02) 18 Claims
OG exemplary drawing
 
1. A display device comprising:
a substrate including a first region and a second region;
a first set of light emitting structures overlapping the first region;
a second set of light emitting structures overlapping the second region;
a diffraction layer overlapping the first region without overlapping the second region; and
a refraction pattern overlapping the diffraction layer,
wherein the diffraction layer includes first-refractive-index members and second-refractive-index members that are alternately disposed,
wherein a refractive index of each of the first-refractive-index members is lower than a refractive index of each of the second-refractive-index members,
wherein in a first viewing angle mode, each of the first set of light emitting structures and the second set of light emitting structures brightens, and
wherein in a second viewing angle mode, the first set of light emitting structures emits light, and the second set of light emitting structures emits no light.