An organic light emitting display comprising: a display panel having a plurality of pixels arranged thereon, wherein each of the pixels comprises an Organic Light Emitting Diode,OLED, and a driving Thin Film Transistor, a Thin Film Transistor being defined here below as a TFT, and the plurality of pixels are divided into multiple pixel groups, each pixel group including two or more pixels connected to different data lines and to a same gate line and a same sensing line, wherein each pixel within the pixel group further comprises a switch TFT connected between the sensing line and a source electrode of the driving TFT and switched by the scan control signal, wherein a kickback current occurs when the switch TFT turned on; a gate driving circuit configured to supply the scan control signal to the gate line; a data driving circuit configured to selectively supply a turn-on driving data voltage and a turn-off data voltage to the data lines in synchronization with the scan control signal, and configured to alternatively supply the turn-on driving data voltage and the turn-off data voltage to a sensing pixel and continuously supply the turn-off data voltage to a non-sensing pixel in a primary sensing period, and configured to continuously supply the turn-off data voltage to the sensing pixel and the non-sensing pixel in a secondary sensing period; a sensing circuit configured to output a first sensing value, acquired in the primary sensing period, by primarily sensing an OLED threshold voltage of the sensing pixel of the pixel group dependent upon the turn-on data voltage, and output a second sensing value, acquired in the secondary sensing period, by secondarily sensing a kickback current dependent upon the turn-off data voltage; and a sensing value correction circuit configured to calculate a final sensing value for the OLED threshold voltage based on the first sensing value and the second sensing value, wherein the sensing value correction circuit is configured to calculate the final sensing value by subtracting the second sensing value from the first sensing value and thereby reduce the effect of the kickback current in the final sensing value, and wherein the switch TFT of the sensing pixel and the switch TFT of the non-sensing pixel are turned on in the primary sensing period and the secondary sensing period. a display panel having a plurality of pixels arranged thereon, wherein each of the pixels comprises an Organic Light Emitting Diode,OLED, and a driving Thin Film Transistor, a Thin Film Transistor being defined here below as a TFT, and the plurality of pixels are divided into multiple pixel groups, each pixel group including two or more pixels connected to different data lines and to a same gate line and a same sensing line, wherein each pixel within the pixel group further comprises a switch TFT connected between the sensing line and a source electrode of the driving TFT and switched by the scan control signal, wherein a kickback current occurs when the switch TFT turned on; a gate driving circuit configured to supply the scan control signal to the gate line; a data driving circuit configured to selectively supply a turn-on driving data voltage and a turn-off data voltage to the data lines in synchronization with the scan control signal, and configured to alternatively supply the turn-on driving data voltage and the turn-off data voltage to a sensing pixel and continuously supply the turn-off data voltage to a non-sensing pixel in a primary sensing period, and configured to continuously supply the turn-off data voltage to the sensing pixel and the non-sensing pixel in a secondary sensing period; a sensing circuit configured to output a first sensing value, acquired in the primary sensing period, by primarily sensing an OLED threshold voltage of the sensing pixel of the pixel group dependent upon the turn-on data voltage, and output a second sensing value, acquired in the secondary sensing period, by secondarily sensing a kickback current dependent upon the turn-off data voltage; and a sensing value correction circuit configured to calculate a final sensing value for the OLED threshold voltage based on the first sensing value and the second sensing value, wherein the sensing value correction circuit is configured to calculate the final sensing value by subtracting the second sensing value from the first sensing value and thereby reduce the effect of the kickback current in the final sensing value, and wherein the switch TFT of the sensing pixel and the switch TFT of the non-sensing pixel are turned on in the primary sensing period and the secondary sensing period.