Organic light emitting diode display device and method for driving the same

A method of driving an organic light emitting diode (OLED) display device which includes first to third transistors, a driving transistor, first and second capacitors, and an OLED, the method comprising:

• initializing a voltage of a first node to a reference voltage according to a scan signal applied to the first transistor, when the first to third transistors are turned on, the first node being a gate of the driving transistor;
• storing a threshold voltage of the driving transistor in the first capacitor connected to a second node that is a source of the driving transistor, when the first and third transistors are turned on and the second transistor is turned off, one end of the first capacitor being connected to the first node;
• supplying the data voltage to the first node, when the first transistor is turned on and the second and third transistors are turned off;
• and
• emitting, by the OLED, light with a difference voltage between the data voltage and the reference voltage when the first transistor is turned off and the second and third transistors are turned on.