Dielectrophoresis in electronic paper

We already reported on the presence of dielectrophoretic forces inside pixels of electrophoretic image displays [Displays 24 (2003) 103]. It was necessary to include these forces in internal physics to explain properties that seemed in discrepancy with theory until then. In this article we explain just how electrophoresis and dielectrophoresis work together in order to make electronic paper work. We also report on a more accurate macroscopic RC-model than the one found until now. Agreement between measurement and model improves with this new electric model.