Patent ID: 11929038
Assignee: LG DISPLAY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A display device comprising:
a display panel in which a plurality of gate lines to which a scan signal is applied, a plurality of data lines to which a data voltage is applied, a plurality of reference voltage lines to which a reference voltage is applied, and a plurality of subpixels are disposed;
a data driving circuit configured to sense a voltage on one reference voltage line selected from the plurality of reference voltage lines through a first path during a first detecting period and through a second path during a second detecting period before performing a sensing operation of a characteristic value of a driving transistor disposed in the display panel; and
a timing controller configured to control the data driving circuit, to transit on and off states of a current flowing through the reference voltage line during an aging period so that a predetermined level of heat is generated from the reference voltage line, and to determine whether or not the reference voltage line is abnormal using sensing voltages detected from the reference voltage line during the first detecting period and the second detecting period.