Pixel, organic light emitting display including the pixel, and method of driving the same

An organic light emitting display, comprising:

• a pixel unit including pixels arranged at intersections of scan lines, emission control lines, control lines and data lines;
• a scan driver for sequentially supplying scan signals to the scan lines, for sequentially supplying emission control signals to the emission control lines, and for sequentially supplying control signals to the control lines;
• and
• a data driver for supplying data signals to the data lines,
• wherein a pixel arranged in an nth (n is a natural number) horizontal line comprises:
• an OLED;
• a storage capacitor coupled between a first power supply and a first node;
• a first transistor for controlling a magnitude of a current that flows from the first power supply to a second power supply through the OLED in response to a magnitude of a voltage applied to the first node;
• a second transistor coupled between one of the data lines and a first electrode of the first transistor, and turned on when a control signal is supplied through an nth control line;
• a third transistor coupled between the first node and a second electrode of the first transistor, and turned on when a scan signal is supplied through an nth scan line;
• and
• a fourth transistor coupled between an initializing power supply and the first node, and turned on when the scan signal is supplied through an (n-1)th scan line.