US 12,117,613 B2
Display device, organic light emitting display device, and head-mounted display device
Sang Hwan Cho, Suwon-si (KR); So Young Lee, Suwon-si (KR); Sun Young Jung, Suwon-si (KR); Chung Sock Choi, Seoul (KR); Sun Mi Kang, Cheonan-si (KR); Hyun Ho Kim, Hwaseong-si (KR); Cheol Jang, Uiwang-si (KR); and Sang Hyun Han, Hwaseong-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Jun. 15, 2020, as Appl. No. 16/901,456.
Application 16/901,456 is a continuation of application No. 15/940,583, filed on Mar. 29, 2018, granted, now 10,684,481.
Claims priority of application No. 10-2017-0055626 (KR), filed on Apr. 28, 2017.
Prior Publication US 2020/0348520 A1, Nov. 5, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 5/18 (2006.01); G02B 27/01 (2006.01); H10K 50/11 (2023.01); H10K 50/844 (2023.01); H10K 50/85 (2023.01); H10K 77/10 (2023.01)
CPC G02B 27/0172 (2013.01) [H10K 50/11 (2023.02); H10K 50/844 (2023.02); H10K 50/85 (2023.02); H10K 77/10 (2023.02); G02F 2201/121 (2013.01); G02F 2201/123 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display device comprising:
a substrate;
a pixel electrode on the substrate;
a display element emitting a light and disposed on the pixel electrode;
a common electrode on the display element;
an encapsulation layer on the common electrode;
an air between the display element and the encapsulation layer; and
a plurality of diffraction patterns on the encapsulation layer,
wherein:
the plurality of diffraction patterns includes a first diffraction pattern and a second diffraction pattern arranged along a first direction with a first period,
a width of a cross section of each of the first diffraction pattern and the second diffraction pattern is defined as a first length,
the first length and the first period satisfy Inequality (1):
0.4≤d1/DP1≤1,  (1)
where DP1 is the first period, and d1 is the first length.