Patent ID: 7612760

Claim:
An electrophoresis device comprising: a pair of substrates; a plurality of pixel electrodes and a common electrode respectively formed on the pair of substrates; a liquid material obtained by dispersing charged particles sealed between the pair of substrates; and a driving circuit for applying a voltage to the pixel electrodes and the common electrode to generate an electric field therebetween, the electrophoresis device performing display by moving the charged particles through the electric field generated by applying the voltage, wherein the driving circuit is adapted to cause all of the pixel electrodes to have a first electric potential cause the common electrode to have a second electric potential, and thereby generate a first electric field between all the pixel electrodes and the common electrode to delete current image displayed over an entire display region when a display image is changed, the driving circuit is adapted to cause the electric potential of the common electrode to change to a third electric potential, cause the electric potentials of the pixel electrodes corresponding to the display to change to a fourth electric potential, cause the electric potentials of the pixel electrodes not corresponding to the display to change to a fifth electric potential, and thereby generate a second electric field between the common electrode and the pixel electrodes corresponding to display and generate a third electric field between the common electrode and the pixel electrodes not corresponding to the display when new display image is to be depicted, the direction of the first electric field is opposite to that of the second electric field, the direction of the first electric field is the same as that of the third electric field, the intensity of the second electric field is greater than that of the third electric field, and the third electric potential is defined according to a maximum voltage shift of electric potential which occurs among the pixel electrodes when the first electric potential is applied to the pixel electrodes.