公开(公告)号：US11308892B2

公开(公告)日：2022-04-19

申请号：US17102124

申请日：2020-11-23

Applicant: LG Display Co., Ltd.

Inventor： Kyung-Hyun Cho ,  Jae-Deok Ko ,  Seong-Eok Han

IPC: G09G3/3208 ,  G09G3/3291 ,  G09G3/3258 ,  G09G3/3266

Abstract: The disclosure relates to an organic light emitting display device that can detect a defect in a scan transistor in the device in which the scan transistor and a sensing transistor simultaneously operate, and the device includes: an OLED in a subpixel; a driving transistor connected between the OLED and a driving voltage line; a scan transistor connected between a first node through which a data voltage is applied to the driving transistor and a data line; a sensing transistor connected between a second node between the driving transistor, the OLED, and a reference voltage line; and a defect detector for applying the data voltage in a state in which both the scan transistor and the sensing transistor are turned off and then detecting an amount of charges charged in a parasitic capacitor of the OLED to determine whether the scan transistor is defective due to foreign substances.