Patent ID: 8964282
Filing Date: 2015-02-24
Classification: G02F,G09G

Abstract:
1. A driving method for an electrophoretic display comprising an electrophoretic fluid which is sandwiched between a common electrode and a layer of pixel electrodes, wherein the electrophoretic fluid comprises a first type of pigment particles, a second type of pigment particles and a third type of pigment particles, all of which are dispersed in a solvent or solvent mixture, wherein: (a) the first type of pigment particles and the second type of pigment particles carry opposite charge polarities; (b) the third type of pigment particles has the same charge polarity as the second type of pigment particles but has an intensity lower than that of the second type of pigment particles; and (c) the second type of pigment particles has a threshold voltage, the method comprises driving an area corresponding to a pixel electrode from a color state of the first type of pigment particles to a color state of the third type of pigment particles by applying a voltage potential difference which is the same as, or lower than, the threshold voltage of the second type of pigment particles.