公开(公告)号：US20230057700A1

公开(公告)日：2023-02-23

申请号：US17842023

申请日：2022-06-16

Applicant: LG DISPLAY CO., LTD.

Inventor： Jinwon KIM ,  MooKyoung HONG

IPC: G09G3/00 ,  G09G3/20

Abstract: A display device includes a display panel in which a plurality of subpixels including a light emitting element that emits light by a high potential voltage supplied to a driving voltage line, and a plurality of reference voltage lines connected to the plurality of subpixels to detect a characteristic value are disposed; a data driving circuit configured to supply a low potential voltage to the driving voltage line through the plurality of reference voltage lines; a base voltage switching circuit configured to control a ground voltage node connected to a cathode electrode of the light emitting element; a current detecting circuit configured to detect a current flowing between the base voltage node and a ground; and a timing controller configured to control the base voltage switching circuit and generate a defect detection signal for the driving voltage line according to a current detected by the current detecting circuit.