Patent ID: 8040303

Claim:
An organic light emitting display, comprising: a first switching element, having a control electrode thereof electrically coupled to a scan line, to transfer a data signal supplied by a data line; a driving transistor, having a control electrode electrically coupled to the first switching element, to control a driving current of a first power supply voltage line; a first capacitive element electrically coupled between the first switching element and the control electrode of the driving transistor; an Organic Light Emitting Diode (OLED), electrically coupled between the driving transistor and a second power supply voltage line, to display an image in response to a current supplied by the driving transistor; a third switching element electrically coupled between the first power supply voltage line and the first capacitive element; and a fourth switching element to supply a current of a first current line to the driving transistor, the current of the first current line compensating for deviations in characteristics of the driving transistor.