The driving voltage line PL is configured to transfer the driving voltage ELVDD to the driving transistor T1, the first initialization voltage line VL1 is configured to transfer a first initialization voltage Vint1 for initializing the driving transistor T1, and the second initialization voltage line VL2 may be configured to transfer a second initialization voltage Vint2 for initializing the first electrode of the organic light-emitting diode OLED.
A driving gate electrode of the driving transistor T1 is electrically connected to the storage capacitor Cst via a second node N2, one of a source region and a drain region of the driving transistor T1 is electrically connected to the driving voltage line PL after passing through the operation control transistor T5 via a first node N1, and the other of the source region and the drain region of the driving transistor T1 may be electrically connected to the first electrode (or pixel electrode) of the organic light-emitting diode OLED after passing through the emission control transistor T6 via a third node N3. The driving transistor T1 receives the data signal Dm according to a switching operation of the switching transistor T2 to supply a driving current to the organic light-emitting diode OLED. For example, the driving transistor T1 may control an amount of current flowing from the first node N1 that is electrically connected to the driving voltage line PL to the organic light-emitting diode OLED, in response to a voltage applied to the second node N2, the voltage varying due to the data signal Dm.