An organic light emitting display for minimizing or preventing nonuniformity in image quality includes a first transistor having a gate electrode connected to a first selection signal, a source electrode connected to a data signal, and a drain electrode connected to a second node; a second transistor having a gate electrode connected to the first selection signal, a source electrode connected to a power voltage, and a drain electrode connected to a first node; a third transistor having a gate electrode connected to a second selection signal, a source electrode connected to a reference voltage, and a drain electrode connected to the second node; a capacitor connected between the first node and the second node; and a fourth transistor having a gate electrode connected to the first node, a source electrode connected to the power voltage, and a drain electrode connected to an organic light emitting diode.

 
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< Pixel circuit

> Display with multiple emission layers

> Lamp with multi-colored OLED elements

~ 00515