Pixel and organic light emitting display using the same

A pixel may include an organic light emitting diode (OLED) with a cathode electrode coupled to a second power source, a first transistor with a first electrode coupled to a data line, with a second electrode coupled to a first node, the first transistor being turned on when a scan signal is supplied to a scan line, a first capacitor coupled between the first node and a third power source to charge a first capacitor voltage corresponding to a data signal supplied from the data line, and a pixel circuit charged by the first capacitor voltage to supply current corresponding to a charged first power source voltage from a first power source to the second power source via the OLED.