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

Claim 15:
16. A display driving method of a display device, wherein the display device includes a plurality of data lines extending to a display panel in which a plurality of subpixels are disposed to supply a data voltage and a reference voltage line electrically connected to a source node of a driving transistor disposed in the display panel, the display driving method comprising:
applying a display-driving reference voltage to the reference voltage line;
sensing a voltage on the reference voltage line through a first path during a first detecting period before performing a sensing operation of a characteristic value of the driving transistor;
blocking the display-driving reference voltage;
transiting on and off states of a current flowing through the reference voltage line during an aging period;
sensing a voltage on the reference voltage line through a second path during a second detecting period before performing a sensing operation of a characteristic value of the driving transistor;
determining whether or not the reference voltage line is abnormal by comparing the voltage sensed during the first detecting period and the voltage sensed during the second detecting period;
sensing a characteristic value of the driving transistor when the reference voltage line is not abnormal; and
stopping the sensing operation of the characteristic value or compensating for the characteristic value using a voltage sensed from an adjacent reference voltage line when the reference voltage line is abnormal.