Display device and a driving method

The present invention relates to a display device and a driving method. Display of the present invention is connected to the light emitting element, the first and second input, which is 2 is connected between the contact point a first capacitor, connected to the first control terminal, the drive voltage that is connected to the second contact with the terminal and the light emitting element the second switching transistor the first switching transistor driver transistor having an output terminal, a data voltage or a sustain voltage and connected between the first contact, and the second contact that is connected between the output terminal of the driving transistor, and reference includes a third switching transistor connected between the current source and the output terminal of the driving transistor. OLED, the threshold voltage, field effect mobility, compensation