Scan driver and organic light-emitting display using same

A scanning driver, comprising:

• a plurality of cascaded structures receiving signals from a first timing clock line and a second timing clock line with opposite phases, the cascaded structures successively generating scanning signals, wherein each of the cascaded structures comprises:
• a scanning output line, used to output the scanning signals;
• a first transistor, connected to a starting signal line or to a the scanning output line of the previous cascaded structure, the first transistor comprising a gate connected to the first timing clock line;
• a second transistor, connected to the second timing clock line and the scanning output line, the second transistor comprising a gate connected to an output terminal of the first transistor;
• a third transistor, connected to a high-level power supply VGH, the third transistor comprising a gate connected to an output terminal of the second transistor;
• a fourth transistor, connected to a low-level power supply VGL and to an output terminal of the third transistor, the fourth transistor comprising a gate connected to the first timing clock line;
• a fifth transistor, connected to a high-level power supply VGH and to a the scanning output line, the fifth transistor comprising a gate connected to an output terminal of the fourth transistor and to an the output terminal of the third transistor;
• and
• a first capacitor, connected between an the output terminal of the first transistor and the scanning output line.