US 12,295,210 B2
Electroluminescent display device having pixel driving circuit
JinYeong Kim, Goyang-si (KR); HyeonHo Son, Goyang-si (KR); and SeongHwan Ju, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Jul. 21, 2022, as Appl. No. 17/870,622.
Claims priority of application No. 10-2021-0151341 (KR), filed on Nov. 5, 2021.
Prior Publication US 2023/0146875 A1, May 11, 2023
Int. Cl. H10K 59/12 (2023.01); H10K 59/121 (2023.01); H10K 59/131 (2023.01)
CPC H10K 59/1213 (2023.02) [H10K 59/1216 (2023.02); H10K 59/131 (2023.02)] 19 Claims
OG exemplary drawing
 
1. An electroluminescent display device, comprising:
a pixel that includes sub-pixels and having a sub-pixel area where the sub-pixels are disposed and a common area,
wherein each of the sub-pixels includes a light emitting element including an anode electrode and a cathode electrode, and
in the sub-pixel area, a first pixel driving circuit is disposed, and
in the common area, a second pixel driving circuit is disposed, the second pixel driving circuit having a first common line and a second common line; the anode electrode of the light emitting element is electrically connected to the first common line, and
wherein each of the sub-pixels further includes:
a driving element including a source electrically connected to a first node, a gate electrically connected to a second node, and a drain electrically connected to a third node;
a fourth transistor electrically connected to the first node;
a second transistor electrically connected to the second node;
a fifth transistor electrically connected to the third node;
a third transistor electrically connected to the second node and the third node;
a first capacitor having a first electrode electrically connected to the second node and a second electrode electrically connect to the second common line;
a second capacitor having a first capacitor electrode and a second capacitor electrode, the first capacitor electrode electrically connected to the first common line and the second capacitor electrode electrically connected to either the first node or the second node; and
a conductive layer disposed under the driving element, wherein the conductive layer is electrically connected to the first node or the gate of the driving element.