Patent ID: 8754843

Claim:
An electrophoretic device, comprising: a first electrode, the first electrode being arranged on a display side of the electrophoretic device; a second electrode; an electrophoretic layer formed between the first electrode and the second electrode, the electrophoretic layer including: a first particle charged with negative electricity and exhibiting a first color; and a second particle charged with positive electricity, and exhibiting a second color; the first particle having a higher mobility than the second particle; and a control circuit i) initially applying a first voltage between the first and the second electrodes such that the first electrode is at a higher potential than the second electrode so that the first particle moves towards the first electrode to correspond to a first color status; and ii) applying a plurality of pulse voltages between the first electrode and the second electrode such that the first electrode is at a lower potential than the second electrode, each of the pulse voltages having a substantially same voltage width and a second substantially same voltage value, the number of times of application of the pulse voltage being determined based on a desired gradation, wherein the voltage pulse width is smaller when shifting from the second color to the first color than when shifting from the first color to the second color.