Organic Light Emitting Diode Display Device and Driving Method Thereof

The invention provides an organic light emitting diode display device and a driving method thereof. The organic light emitting diode display device includes: a scan switch controlled by a scan pulse on a gate line and connected between a data line and a first node; a driving switch which includes a gate electrode connected to the first node, a source electrode connected to a second node, and a drain electrode connected to a first driving voltage line; a sensing switch controlled by a sensing control signal and connected between the second node and a third node on a sensing line; and an organic light emitting diode connected between the second node and a second driving voltage line. In the first initialization interval, the scan switch and the sensing switch are turned on and the first reference voltage is imposed on the first node. Thus, voltage on the second node and the third node change in the first sensing interval. The voltage on the third node is detected in the first sampling interval and reflected in the second reference voltage of the threshold voltage switch.