Electrochromic display device

摘要

An electronic display device is described in which the counter-electrode is made of a layer of porous metal which is electrochemically irreversible as well as a display electrode and an electrolyte containing an electrochromic substance capable of reversibly displaying color together with a solution of metal ions of the porous metal counter electrode. The electrodes and electrolyte are contained within a cell in which, during operation, an electric double layer is formed on the surface of the porous metal counter-electrode.