an organic light emitting display device includes : a plurality of pixels at crossing regions of a plurality of scan lines and data lines ; a first control line and a second control line commonly connected with the plurality of pixels ; a control line driver configured to supply a first control signal to the first control line and a second control signal to the second control line , where the second control signal is not concurrent with the first control signal ; and a first power supply that supplies a first power to each of the plurality of pixels , where a voltage level of the first power is configured to change at least once during a frame period for each of the pixels .