US 12,015,048 B2
Display device
Joo Woan Cho, Seongnam-si (KR); Dae Ho Song, Hwaseong-si (KR); Tae Hee Lee, Hwaseong-si (KR); Hyung Il Jeon, Seoul (KR); and Byeong Hwa Choi, Seoul (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Jan. 6, 2022, as Appl. No. 17/570,112.
Claims priority of application No. 10-2021-0056582 (KR), filed on Apr. 30, 2021.
Prior Publication US 2022/0352243 A1, Nov. 3, 2022
Int. Cl. H01L 23/00 (2006.01); H01L 23/48 (2006.01); H01L 25/18 (2023.01); H01L 27/15 (2006.01); H01L 27/105 (2023.01)
CPC H01L 27/156 (2013.01) [H01L 23/481 (2013.01); H01L 24/06 (2013.01); H01L 25/18 (2013.01); H01L 24/05 (2013.01); H01L 24/08 (2013.01); H01L 24/16 (2013.01); H01L 24/48 (2013.01); H01L 27/105 (2013.01); H01L 2224/05025 (2013.01); H01L 2224/05541 (2013.01); H01L 2224/0613 (2013.01); H01L 2224/06181 (2013.01); H01L 2224/08225 (2013.01); H01L 2224/16145 (2013.01); H01L 2224/48229 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display device comprising:
a first substrate comprising a display area, a non-display area, and a plurality of pixel circuit units in the display area and the non-display area;
a plurality of light emitting elements on the first substrate in the display area, the plurality of light emitting elements being electrically connected to the pixel circuit units;
a hole mask layer on the first substrate and comprising a plurality of holes corresponding to the light emitting elements;
a second substrate on the hole mask layer and comprising a plurality of open holes corresponding to the plurality of holes; and
a plurality of light exit patterns in the plurality of open holes of the second substrate corresponding to the plurality of holes,
wherein each of the light exit patterns comprises a first part in one of the plurality of open holes and a second part protruding from an upper surface of the second substrate, wherein a refractive index of each of the light exit patterns is greater than a refractive index of the second substrate.