US Patent 7973483 Light emitting pixel and apparatus for driving the same

A light emitting pixel includes a first organic light emitting diode (OLED) and a capacitor supplying to the first OLED current generated by an electric charge corresponding to a difference between a first voltage supplied to a first electrode of the capacitor and a second voltage supplied to a second electrode of the capacitor. The light emitting pixel further include a second OLED to supply the first voltage to the first electrode. The light emitting pixel further includes a voltage supply device to supply the first voltage to the first electrode in response to the second voltage.