Electrophoretic fluids

An electrophoretic fluid comprising at least one solvent, at least one set of coloured particles, at least one set of white reflective particles, and at least one set of transparent particles, wherein the white reflective particles and the transparent particles have the same electric charge sign wherein the white reflective particles, and the transparent particles comprise a polymeric shell adsorbed onto the particle wherein the polymeric shell consists of a random copolymer selected from random copolymers comprising mono-terminated polydimethylsiloxan methacrylate, (2,3-epoxypropyl)-methacrylat, and 2-tert-butylaminoethylmethacrylate or graft copolymers comprising polystearate methacrylate, (2,3-epoxypropyl)-methacrylat, and 2-tert-butylaminoethylmethacrylate or random copolymers comprising dodecylmethacrylate, and (2-(methylacryloyloxy) ethyltrimethyl ammonium methylsulfate and wherein the electrophoretic mobilities of the white reflective particles and the transparent particles differ at most by 5%.