公开(公告)号：US11238765B2

公开(公告)日：2022-02-01

申请号：US17203506

申请日：2021-03-16

Applicant: Samsung Display Co., Ltd.

Inventor： Youngok Park ,  Uikang Kim ,  Junggeun Lee

IPC: G09G3/00 ,  G09G3/20 ,  G02F1/1362 ,  G02F1/13

Abstract: A display device includes a substrate, a plurality of pixel columns, and a lighting test circuit unit. The lighting test circuit unit is disposed in a non-display area on the substrate, includes a plurality of lighting test transistors, and provides a lighting test voltage to the pixel columns. Each of the lighting test transistors includes an active pattern including a source area, a drain area, and a channel area, a gate electrode disposed in the channel area, an interlayer insulating layer including a first contact hole spaced apart from a first side of the gate electrode by about 7 um or more, and a source electrode contacting the source area of the active pattern through the first contact hole.