Display device and driving method thereof

A driving method of a display device comprising a light-emitting element, a capacitor, and a driving transistor connected to the capacitor, the driving transistor comprising a control terminal, an input terminal, and an output terminal, the method comprising:

• connecting an anode terminal of the light-emitting element with a reference current source;
• sensing a voltage of the anode terminal of the light-emitting element;
• and
• calculating a transition degree of a threshold voltage of the light-emitting element by comparing a voltage of the anode terminal of the light-emitting element with a reference anode voltage.

A driving method of a display device comprising a sensing line and a display pixel having a light-emitting element, a capacitor, and a driving transistor connected to the capacitor, the driving transistor comprising a control terminal, an input terminal, and an output terminal, the method comprising:

• connecting the control terminal with a data voltage and connecting the sensing line with a precharge voltage;
• disconnecting the control terminal from the data voltage and connecting the light-emitting element with the output terminal;
• disconnecting the light-emitting element from the output terminal;
• sensing an anode voltage of the light-emitting element through the sensing line after the light-emitting element is disconnected from the output terminal;
• and
• calculating a transition degree of a threshold voltage of the light-emitting element by comparing an anode voltage of the light-emitting element with a reference anode voltage.

A driving method of a display device comprising a plurality of first display pixels each having a first light-emitting element, a first capacitor, and a first driving transistor connected to the first capacitor, the first driving transistor having a first control terminal, a first input terminal, and a first output terminal, the method comprising:

• connecting the first control terminal with a data voltage;
• disconnecting the first control terminal from the data voltage and connecting the first light-emitting element with the first output terminal;
• connecting the first light-emitting element with the first output terminal;
• applying a reference voltage that is lower than a threshold voltage of the first driving transistor to the first control terminal;
• connecting the first output electrode with a ground voltage and disconnecting the first output electrode from the ground voltage;
• sensing a voltage of the first output electrode;
• and
• calculating a threshold voltage of the first driving transistor based on a voltage of the first output electrode.