Patent ID: 6927892
Filing Date: 2005-08-09
Classification: G02F

Abstract:
1. An image display which comprises: (a) two layers of substrate, one on the viewing side and the other on the non-viewing side and at least the substrate on the viewing side is transparent; (b) an array of cells sandwiched between the two layers and said cells are filled with a dispersion in which magnetic particles are suspended in a slovent or solvent mixture; and (c) a writing means, wherein said magnetic particles are prepared from a material selected from the group consisting of gamma ferric oxide, acicular magnetite, cobalt-modified or adsorbed ferric oxide, berthollide ferric oxide, chromium dioxide, and a metals or an alloy, in which said metal or alloy is stainless steel, Fe—Co, Fe—Ni, Fe—Co—Ni, Co—Ni, Co—Cr or Fe—Co—V alloy.