US 12,289,973 B2
Light emitting display apparatus and multi-screen display apparatus including the same
Subin Kim, Paju-si (KR); Youngin Jang, Paju-si (KR); and Kyungyun Kang, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Nov. 4, 2022, as Appl. No. 18/052,833.
Claims priority of application No. 10-2021-0186120 (KR), filed on Dec. 23, 2021.
Prior Publication US 2023/0209934 A1, Jun. 29, 2023
Int. Cl. H10K 59/131 (2023.01); G09G 3/20 (2006.01); G09G 3/3233 (2016.01); G09G 3/3275 (2016.01); H10K 50/844 (2023.01)
CPC H10K 59/131 (2023.02) [G09G 3/2096 (2013.01); G09G 3/3233 (2013.01); G09G 3/3275 (2013.01); H10K 50/844 (2023.02); G09G 2300/026 (2013.01); G09G 2300/0426 (2013.01); G09G 2310/0286 (2013.01); G09G 2330/12 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A light emitting display apparatus comprising:
a substrate;
a display portion including a plurality of pixel driving lines disposed over the substrate and a plurality of pixels including a pixel circuit connected to the plurality of pixel driving lines, the pixel circuit being including at least one transistor;
a light emitting device layer including a self-emitting device disposed at the display portion;
a dam portion including at least one dam disposed along a periphery portion of the substrate;
a metal line disposed within the at least one dam;
an encapsulation layer disposed to cover the light emitting device layer, the encapsulation layer including an organic encapsulation layer surrounded on at least four sides by the dam portion;
a plurality of switching circuit portions disposed to overlap the at least one dam and connected to the plurality of pixel driving lines;
a front pad portion including a plurality of front pads disposed at the periphery portion of the substrate and electrically coupled to the plurality of pixel driving lines and the metal line of the at least one dam,
wherein each of the plurality of switching circuit portions includes first and second switching circuits each including a gate electrode,
wherein the gate electrode of each of the first switching circuit and the second switching circuit is electrically and directly coupled to corresponding metal line inside the at least one dam, and
wherein the metal line is configured to receive a switching control signal through the front pad portion in a test mode and a ground voltage through the front pad portion in a normal driving mode.