Patent ID: 7816678

Claim:
An organic light emitting display having a single crystalline silicon thin film transistor (TFT), the organic light emitting display, comprising: a plurality of X lines adapted to receive vertical scanning signals and a plurality of Y lines adapted to receive horizontal driving signals disposed on a substrate to cross each other in a matrix form; a plurality of organic light emitting diodes (OLEDs) disposed on pixel regions defined by the X lines and the Y lines; a semiconductor circuit unit driving the OLEDs; and a plurality of Z lines supplying power adapted to drive the OLEDs to the semiconductor circuit unit, wherein the substrate is a plastic substrate, and the semiconductor circuit unit includes: a switching transistor formed of single crystalline silicon and connected to one of the X lines and one of the Y lines; a driving transistor formed of single crystalline silicon and connected to the OLEDs; and a memory capacitor, wherein the semiconductor circuit unit has a single crystalline silicon two transistors-one capacitor (2T-1C) structure on the plastic substrate, and at least one channel of the switching transistor and at least one channel of the driving transistor is formed of the single crystalline silicon.