US 12,106,689 B2
Display device and test method thereof
Sung Bae Ju, Hwaseong-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Jul. 16, 2020, as Appl. No. 16/931,100.
Claims priority of application No. 10-2019-0136865 (KR), filed on Oct. 30, 2019.
Prior Publication US 2021/0134197 A1, May 6, 2021
Int. Cl. G09G 3/00 (2006.01); H01L 27/32 (2006.01); H10K 59/131 (2023.01)
CPC G09G 3/006 (2013.01) [H10K 59/131 (2023.02)] 16 Claims
OG exemplary drawing
 
1. A display device comprising:
a substrate in which a cut-out portion is defined; and
a first conductive layer disposed on the substrate and including a first signal line and a first test line,
wherein materials constituting the substrate are not present in the cut-out portion,
a portion of the first test line does not contact the substrate and the portion of the first test line that does not contact the substrate crosses the cut-out portion and overlaps at least a portion of the cut-out portion in a thickness direction, and
one end portion of the first test line includes a first pad region which is expanded.