US 12,262,612 B2
Light emitting display apparatus and multi-screen display apparatus including the same
Minjae Shin, Paju-si (KR); and Insu Hwang, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Dec. 29, 2021, as Appl. No. 17/564,923.
Claims priority of application No. 10-2020-0189783 (KR), filed on Dec. 31, 2020.
Prior Publication US 2022/0208952 A1, Jun. 30, 2022
Int. Cl. H10K 59/35 (2023.01); H10K 59/18 (2023.01)
CPC H10K 59/18 (2023.02) 21 Claims
OG exemplary drawing
 
1. A light emitting display apparatus comprising:
a plurality of pixels arranged along a first direction and a second direction different from the first direction over a first substrate;
a circuit layer including a pixel common voltage line in parallel with the second direction and disposed between the plurality of pixels along the first direction;
a light emitting device layer including a self-emitting device disposed over the circuit layer and a common electrode disposed over the self-emitting device;
a common electrode connection portion electrically coupling the pixel common voltage line to the common electrode; and
an inner isolation member surrounding the common electrode connection portion and isolating the self-emitting device adjacent to the common electrode connection portion,
wherein the circuit layer further includes an interlayer insulation layer disposed over the pixel common voltage line and a passivation layer disposed over the interlayer insulation layer,
wherein the common electrode connection portion comprises:
a first electrode connection pattern disposed between the interlayer insulation layer and the passivation layer and electrically connected to the pixel common voltage line;
a second electrode connection pattern disposed over the passivation layer and electrically connected to the first electrode connection pattern; and
a connection trench including an undercut area formed by removing the passivation layer between an end portion of the second electrode connection pattern and the first electrode connection pattern, and
wherein the common electrode is electrically connected to a lateral surface and a bottom surface of the end portion of the second electrode connection pattern.