US Patent 8450121 Method of manufacturing an organic light emitting display

A pixel includes an organic light emitting diode, a first transistor having a source coupled to a first power source, a control gate coupled to a first node, and a drain coupled to a second node, wherein the first transistor includes a floating gate and an insulating layer between the floating gate and the control gate, a second transistor having a source coupled to a data line, a drain coupled to the first node, and a gate coupled to a scan line, a third transistor having a source coupled to the second node, a drain coupled to the organic light emitting diode, and a gate coupled to one of a light emitting control line and the scan line, and a capacitor coupled between the first power source and the first node.