The organic el display device and control method thereof

The organic EL display device according to the present invention includes a driving transistor (173), a scanning transistor (171), the gate electrode of the driving transistor (173) - a capacitor inserted between the source electrode (174), the driving transistor (173 a plurality of light emitting pixels (170) arranged in a matrix and a connected light emitting element to the drain electrode (175)) of a plurality of provided corresponding to each row of the plurality of light emitting pixels (170) power line (162), and a driving circuit, the driving transistor (173) has a back gate electrode, the driving circuit, by application to the back gate electrode a predetermined bias voltage, the driving transistor (173) the absolute value of the threshold voltage and non-conductive larger than to the driving transistor (173) potential difference between the gate electrode and the source electrode, the driving transistor (173) in a state of being nonconductive, the signal voltage in the capacitor (174) the corresponding voltage is held.