Driving method for light emitting diode display device

The invention discloses a driving method for a light-emitting diode display device. The display device comprises a plurality of light emitting diode serials, a plurality of scanning transistors, a plurality of current regulators and a power converter. The driving method comprises the following steps: detecting a plurality of light emitting diode cathode voltages on a plurality of nodes between the light emitting diode string and the current regulator; when the cathode voltage of the first light emitting diode is equal to the lowest operational voltage of the current regulator and the cathode voltage of the second light emitting diode exceeds the lowest operational voltage of the current regulator, the pulse current level of the driving current is increased and the duty cycle ratio of the driving current is reduced. Therefore, the driving current flowing through the second data channel is adjusted. The driving method can avoid unnecessary power consumption and improve thermal energy distribution balance betwee