US 11,658,205 B2
Electroluminescent display device
Jeong-Mook Choi, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Dec. 8, 2020, as Appl. No. 17/115,526.
Claims priority of application No. 10-2019-0162802 (KR), filed on Dec. 9, 2019.
Prior Publication US 2021/0175281 A1, Jun. 10, 2021
Int. Cl. H01L 27/15 (2006.01); H01L 33/62 (2010.01); H01L 33/38 (2010.01)
CPC H01L 27/156 (2013.01) [H01L 33/38 (2013.01); H01L 33/62 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electroluminescent display device comprising:
a substrate on which a display area displaying an image and a non-display area disposed outside the display area are defined;
a plurality of sub-pixels disposed in the display area on the substrate and arranged along a first direction and a second direction;
a light-emitting diode disposed at each of the plurality of sub-pixels and including a first electrode, a light-emitting layer, and a second electrode;
a first bank disposed between adjacent sub-pixels arranged along the second direction and overlapping edges of the first electrode; and
a second bank disposed between adjacent sub-pixels arranged along the first direction and having an opening corresponding to a column of the sub-pixels arranged along the second direction,
wherein the opening includes a first portion corresponding to the display area and a second portion corresponding to the non-display area, and wherein a width of the second portion is narrower than a width of the first portion,
wherein the opening includes a first opening, a second opening, and a third opening corresponding to a first sub-pixel column, a second sub-pixel column, and a third sub-pixel column each including the sub-pixels arranged along the second direction, respectively,
wherein a width of the second sub-pixel column is larger than a width of the first sub-pixel column and smaller than a width of the third sub-pixel column along the first direction,
wherein the second portions of the first opening, the second opening, and the third opening have different shapes, and
wherein the second portions of the second opening and the third opening have uneven patterns, and the uneven patterns of the second portion of the second opening are alternately disposed with the uneven patterns of the second portion of the third opening.