The invention relates to a scan driver, flat panel display using the same and associated methods. The scan driver may include a plurality of sub-scan drivers. Each of the sub-scan drivers may include a shift register configured to receive a start pulse and a clock signal to output p shift signals, a selector configured to receive a select control signal and at least two shift signals among the p shift signals of the shift register, and to output one of the at least two shift signals to a next sub-scan driver in accordance with the select control signal, and a buffer configured to receive the p shift signals output from the shift register and to output the p shift signals. A next sub-scan driver may receive the selected shift signal as the start pulse.