Display device and method for driving the same

A display device, comprising:

• pixels configured to emit light of various intensity in accordance with driving signals;
• data lines to communicate the driving signals to the pixels;
• scan lines to communicate scan signals to select one or more of the pixels to receive the driving signals;
• and
• a power supply to supply at least one driving voltage to the pixels,
• wherein at least one of the pixels comprises:
• a switching transistor receiving a scan signal through one of the scan lines, and having a first electrode connected to a data line and a second electrode connected to a first node,
• a driving transistor comprising an oxide transistor connected between the power supply and an organic light emitting diode, and having first and second gate electrodes connected to separate lines to receive different signals, the first gate electrode which is floating or applied to 0V, and
• a storage capacitor having a first terminal connected to the first node and a second terminal connected to the second gate electrode of the driving transistor.

A method for driving an display device, the method comprising:

• initializing a gate electrode of a driving transistor with a first driving voltage in accordance with a scan signal and a first control signal;
• initializing a first electrode of the driving transistor with a second driving voltage in accordance with the scan signal, the second driving voltage having a level lower than the first driving voltage level;
• providing a data signal to a first node of a storage capacitor connected between the first node and the gate electrode of the driving transistor in accordance with a scan signal;
• applying the data signal to the first electrode of the driving transistor in accordance with a second control signal.

A display device, comprising:

• pixels configured to emit light of various intensity in accordance with driving signals;
• data lines to communicate the driving signals to the pixels;
• scan lines to communicate scan signals to select one or more of the pixels to receive the driving signals;
• and
• a power supply to supply at least one driving voltage to the pixels,
• wherein at least one of the pixels comprises:
• a switching transistor receiving a scan signal through one of the scan lines, and having a first electrode connected to a data line and a second electrode connected to a first node,
• a driving transistor comprising an oxide transistor connected between the power supply and an organic light emitting diode, and having first and second gate electrodes connected to separate lines to receive different signals, the second gate electrode being electrically connected to a cathode of the organic light emitting diode, and
• a storage capacitor having a first terminal connected to the first node and a second terminal connected to the first gate electrode of the driving transistor.