METHODS FOR DRIVING ELECTROPHORETIC DISPLAYS USING DIELECTROPHORETIC FORCES

摘要

A dielectrophoretic display has a substrate having walls defining a cavity, the cavity having a viewing surface and a side wall inclined to the viewing surface. A fluid is contained within the cavity; and a plurality of particles are present in the fluid. There is applied to the substrate an electric field effective to cause dielectrophoretic movement of the particles so that the particles occupy only a minor proportion of the viewing surface.

主权项

1. A method for operating a dielectrophoretic display, the method comprising:
providing a substrate having walls defining at least one cavity, the cavity having a viewing surface; a fluid contained within the cavity; and a plurality of at least one type of particle within the fluid; and applying to the substrate an alternating electric field effective to cause dielectrophoretic movement of the particles so that the particles occupy only a minor proportion of the viewing surface; and applying to the substrate a direct current electric field effective to cause movement of the particles such that they occupy substantially the entire viewing surface, thereby rendering the display substantially opaque.