A light emitting display including a plurality of data lines (D1,..., Dm) arranged to transmit data voltages (V DATA) corresponding to video signals, a plurality of scan lines (S1,..., Sn) arranged to transmit select signals, and a plurality of pixel circuits, each said pixel circuit coupled to a corresponding said data line (D1,..., Dm) to receive a corresponding said data voltage (V DATA) and a corresponding said scan line (S1,..., Sn) to receive a corresponding said select signal, each said pixel circuit comprising: a transistor including a first electrode, a second electrode arranged to receive a first power supply voltage (V DD), and a third electrode arranged to output a current (I OLED) corresponding to a voltage between the first electrode and the second electrode; a light emitting element (OLED) coupled to the third electrode arranged to emit light corresponding to the current (I OLED) outputted by the third electrode; a first switch arranged to transmit the corresponding said data voltage (V DATA) in response to the corresponding said select signal from the corresponding said scan line (S1,..., Sn); and a voltage compensator arranged to receive the corresponding said data voltage (V DATA) transmitted by the first switch and a second power supply voltage (V SUS), and to apply a compensated data voltage based on the corresponding said data voltage (V DATA) and the second power supply voltage (V SUS) to the first electrode of the transistor, wherein the voltage compensator comprises: a capacitor having a first electrode coupled to the first electrode of the transistor, and a second electrode coupled to the first switch; and a third switch coupled between the second electrode of the capacitor and the second power supply voltage (V SUS), arranged to electrically isolate the second power supply voltage (V SUS) from the second electrode of the capacitor in response to a second control signal (Sn), and characterised in that the voltage compensator further comprises: a second switch arranged to apply the first power supply voltage to the first electrode of the capacitor in response to a first control signal (Control signal), the second switch consisting of a transistor having a gate electrode, a first electrode and a second electrode, wherein the first electrode of the second switch is directly coupled to the first power supply voltage and the second electrode of the second switch is directly coupled to the first electrode of the capacitor. a transistor including a first electrode, a second electrode arranged to receive a first power supply voltage (V DD), and a third electrode arranged to output a current (I OLED) corresponding to a voltage between the first electrode and the second electrode; a light emitting element (OLED) coupled to the third electrode arranged to emit light corresponding to the current (I OLED) outputted by the third electrode; a first switch arranged to transmit the corresponding said data voltage (V DATA) in response to the corresponding said select signal from the corresponding said scan line (S1,..., Sn); and a voltage compensator arranged to receive the corresponding said data voltage (V DATA) transmitted by the first switch and a second power supply voltage (V SUS), and to apply a compensated data voltage based on the corresponding said data voltage (V DATA) and the second power supply voltage (V SUS) to the first electrode of the transistor, wherein the voltage compensator comprises: a capacitor having a first electrode coupled to the first electrode of the transistor, and a second electrode coupled to the first switch; and a third switch coupled between the second electrode of the capacitor and the second power supply voltage (V SUS), arranged to electrically isolate the second power supply voltage (V SUS) from the second electrode of the capacitor in response to a second control signal (Sn), and characterised in that the voltage compensator further comprises: a second switch arranged to apply the first power supply voltage to the first electrode of the capacitor in response to a first control signal (Control signal), the second switch consisting of a transistor having a gate electrode, a first electrode and a second electrode, wherein the first electrode of the second switch is directly coupled to the first power supply voltage and the second electrode of the second switch is directly coupled to the first electrode of the capacitor. a capacitor having a first electrode coupled to the first electrode of the transistor, and a second electrode coupled to the first switch; and a third switch coupled between the second electrode of the capacitor and the second power supply voltage (V SUS), arranged to electrically isolate the second power supply voltage (V SUS) from the second electrode of the capacitor in response to a second control signal (Sn), and characterised in that the voltage compensator further comprises: a second switch arranged to apply the first power supply voltage to the first electrode of the capacitor in response to a first control signal (Control signal), the second switch consisting of a transistor having a gate electrode, a first electrode and a second electrode, wherein the first electrode of the second switch is directly coupled to the first power supply voltage and the second electrode of the second switch is directly coupled to the first electrode of the capacitor.