A method of driving an electrophoretic medium in a colored electrophoretic display, the electrophoretic medium comprising a colored fluid and at least first and second species of particles disposed in the fluid, the first species of particles being white and the fluid and the second species of particles being non-white and of different colors (Y, M), the electrophoretic medium having a first surface arranged on the viewing side of the electrophoretic display, the method comprising: (a) applying a first voltage pulse to the medium, thereby causing the first species of particles to move in one direction of an electric field caused by the first voltage pulse, and the second species of particles to move in the opposed direction of the electric field and to lie adjacent the first surface, so that the first surface displays a combination of the colors of the second species of particles and the fluid; and (b) applying to the medium a second voltage pulse equal in magnitude but opposite in polarity to the first voltage pulse, thereby causing the first species of particles to move in one direction of an electric field caused by the second voltage pulse and to lie adjacent the first surface, and the second species of particles to move in the opposed direction of the electric field an away from the first surface, so that the first surface displays the white color of the first species of particles; the method being characterized by: (c) applying to the medium a third voltage pulse, larger than the magnitude of the first voltage pulse but having the same polarity as the first voltage pulse, thereby causing both the first and second species of particles to move in one direction of an electric field caused by the third voltage pulse and both the first and second species of particles to lie adjacent the first surface so that the first surface displays the color of the second species of particles and (d) applying to the medium a fourth voltage pulse larger than the magnitude of the second voltage pulse but having the same polarity as the second voltage pulse, thereby causing both the first and second species of particles to move in one direction of an electric field caused by the fourth voltage pulse away from the first surface so that the first surface displays the color of the colored fluid, wherein the reversal of the direction of movement of the first, white species of particles in steps (c) and (d), in comparison with steps (a) and (b), upon increasing the magnitude of the voltage pulses is due to charge reversal on the first species of particles. (a) applying a first voltage pulse to the medium, thereby causing the first species of particles to move in one direction of an electric field caused by the first voltage pulse, and the second species of particles to move in the opposed direction of the electric field and to lie adjacent the first surface, so that the first surface displays a combination of the colors of the second species of particles and the fluid; and (b) applying to the medium a second voltage pulse equal in magnitude but opposite in polarity to the first voltage pulse, thereby causing the first species of particles to move in one direction of an electric field caused by the second voltage pulse and to lie adjacent the first surface, and the second species of particles to move in the opposed direction of the electric field an away from the first surface, so that the first surface displays the white color of the first species of particles; (c) applying to the medium a third voltage pulse, larger than the magnitude of the first voltage pulse but having the same polarity as the first voltage pulse, thereby causing both the first and second species of particles to move in one direction of an electric field caused by the third voltage pulse and both the first and second species of particles to lie adjacent the first surface so that the first surface displays the color of the second species of particles and (d) applying to the medium a fourth voltage pulse larger than the magnitude of the second voltage pulse but having the same polarity as the second voltage pulse, thereby causing both the first and second species of particles to move in one direction of an electric field caused by the fourth voltage pulse away from the first surface so that the first surface displays the color of the colored fluid, wherein the reversal of the direction of movement of the first, white species of particles in steps (c) and (d), in comparison with steps (a) and (b), upon increasing the magnitude of the voltage pulses is due to charge reversal on the first species of particles.