Patent ID: 8300008

Claim:
A method for operating an electrophoretic display apparatus, the electrophoretic display apparatus including: a first substrate; a second substrate; an electrophoretic device being held between the first substrate and the second substrate and containing electrophoretic particles; a first electrode formed on a surface of the first substrate, the surface facing the electrophoretic device; and a second electrode formed on a surface of the second substrate, the surface facing the electrophoretic device, the method comprising: image displaying in which a voltage is applied to the electrophoretic device, the image displaying including device driving in which the electrophoretic device is driven by inputting a first potential into the first electrode and inputting a second potential into the second electrode, and accumulated-charge removing in which a potential of the first electrode is changed, from the first potential to the second potential, stepwise or uniformly at a potential change velocity lower than a potential change velocity upon starting of the device driving, wherein, in the accumulated-charge removing, the potential change velocity for the first electrode is in a region represented by Expression (1) below: v e ≦|V 1 −V 2|/τ (1) where v e represents the potential change velocity for the first electrode, V1 represents the first potential, V2 represents the second potential, and τ represents a time constant of the electrophoretic device.