PIXEL CIRCUIT AND DRIVING METHOD AND DISPLAY DEVICE THEREOF

A pixel circuit includes an OLED, a driving transistor, first and second transistors, a storage capacitor and a coupling capacitor. The OLED includes an anode and a cathode connected to a first voltage source. The driving transistor includes a first node connected to a second voltage source, a second node, and a third node connected to the anode. The first transistor includes first, second and third terminals connected to a data driving line, a first control signal source, and the second node, respectively. The second transistor includes a first terminal, a second terminal connected to a second control signal source, and a third terminal connected to the anode and the third node. The storage capacitor includes first and second terminals connected to a third voltage source and the second transistor, respectively. The coupling capacitor includes first and second terminals connected to the second transistor and the second node, respectively.