An organic light emitting display comprising: a display panel including first pixels displaying a first color, second pixels displaying a second color, and third pixels displaying a third color; a data driving circuit configured to generate a data voltage; a demultiplexer (demux) switching circuit including first to Nth demux switches (S11, S12, S21, S22, S31, S32) connected to each output channel (CH1, CH2, CH3) of the data driving circuit, where N is a positive integer equal to or greater than 2, the demux switching circuit configured to time-division supply the data voltage received from one output channel of the data driving circuit to N data lines of the display panel; and a control signal generator configured to generate first to Nth demux control signals (DMUX1, DMUX2) for controlling operations of the first to Nth demux switches, wherein the first to Nth demux control signals (DMUX1, DMUX2) sequentially rise to an on-level (Lon) and then sequentially fall to an off-level (Loff) in a programming period, in which a first scan signal (SCAN1) used to apply the data voltage (Vdata1, Vdata2) to the pixels is held at the on-level, wherein N is 2, and wherein pixels, on one horizontal pixel line, displaying the same color are selectively connected to first demux switches (S11, S21, S31) simultaneously operating in response to a first demux control signal (DMUX1) and second demux switches (S12, S22, S32) simultaneously operating in response to a second demux control signal (DMUX2), wherein the first scan signal (SCAN1) falls to the off-level (Loff) for an emission period following the programming period, wherein all of the first to Nth demux control signals (DMUX1, DMUX2) in the programming period fall earlier than the off-level (Loff) of the first scan signal (SCAN1) in the emission period; and wherein the demux signals (DMUX1, DMUX2) for controlling the respective demux switches (S11, S21, S31; S12, S22, S32) exhibit the same number of falls during the programming period preceding the first scan signal (SCAN1) falling to the off-level. a display panel including first pixels displaying a first color, second pixels displaying a second color, and third pixels displaying a third color; a data driving circuit configured to generate a data voltage; a demultiplexer (demux) switching circuit including first to Nth demux switches (S11, S12, S21, S22, S31, S32) connected to each output channel (CH1, CH2, CH3) of the data driving circuit, where N is a positive integer equal to or greater than 2, the demux switching circuit configured to time-division supply the data voltage received from one output channel of the data driving circuit to N data lines of the display panel; and a control signal generator configured to generate first to Nth demux control signals (DMUX1, DMUX2) for controlling operations of the first to Nth demux switches, wherein the first to Nth demux control signals (DMUX1, DMUX2) sequentially rise to an on-level (Lon) and then sequentially fall to an off-level (Loff) in a programming period, in which a first scan signal (SCAN1) used to apply the data voltage (Vdata1, Vdata2) to the pixels is held at the on-level, wherein N is 2, and wherein pixels, on one horizontal pixel line, displaying the same color are selectively connected to first demux switches (S11, S21, S31) simultaneously operating in response to a first demux control signal (DMUX1) and second demux switches (S12, S22, S32) simultaneously operating in response to a second demux control signal (DMUX2), wherein the first scan signal (SCAN1) falls to the off-level (Loff) for an emission period following the programming period, wherein all of the first to Nth demux control signals (DMUX1, DMUX2) in the programming period fall earlier than the off-level (Loff) of the first scan signal (SCAN1) in the emission period; and wherein the demux signals (DMUX1, DMUX2) for controlling the respective demux switches (S11, S21, S31; S12, S22, S32) exhibit the same number of falls during the programming period preceding the first scan signal (SCAN1) falling to the off-level.