Patent ID: 7965438

Claim:
A display device comprising: a pair of substrates, at least one of the substrates being transparent and the pair of substrates being arranged to be opposite to each other; and an electrolyte layer, that is provided between the pair of substrates and has an electrolytic solution comprising a metal ion; in the display device by applying one stimulus to at least one of one or more of the pair of substrates or the electrolyte layer fine metal particles comprising the metal of the metal ion from the electrolyte are deposited at least one location of one or more surfaces of the pair of substrates that are in contact with the electrolyte layer or within the electrolyte layer; and a concentration of the metal ion of the metal fine particles in the electrolyte after the application of the one stimulus is approximately 200 mmol/l or less, wherein the electrolytic solution further comprises as a supporting electrolyte a salt that forms a complex with the metal ion, and the supporting electrolyte comprises at least one selected from the group consisting of LiF, LiCl, LiI, LiCN, NaX in which X represents a fluorine atom, a chlorine atom, a bromine atom, an iodine atom or a CN, KX in which X represents a fluorine atom, a chlorine atom, a bromine atom, an iodine atom or a CN, and a halogenated quaternary ammonium salt.