Patent ID: 6985132

Claim:
A display device comprising a plurality of charged substances in different charged states or with opposite polarities in two regions of a surface area of a base material, wherein an organic monomolecular film is bonded and fixed to a part of or an entire surface of the base material having a volume of less than 1 cm 3 via —A—O— bond, where A denotes Si, Ge, Sn, Ti or Zr, or via —A—N— bond, where A denotes Si, Ge, Sn, Ti or Zr; the surface region of the base material is divided into two regions in accordance with the kind of organic monomolecular films or the presence or absence of the organic monomolecular film; and each of the two regions accounts for 40% or more and 60% or less of the surface area of the base material; and wherein the plurality of charged substances are dipped in liquid between a pair of substrates each having an electrode, and voltage is applied to the electrodes, thereby enabling the charged substances to be rotated.