Patent ID: 8014056

Claim:
A display element comprising: an electrochromic compound which is colored or decolored due to oxidation or reduction, a metallic salt compound, an electrolyte, and white scattering material incorporated between opposed electrodes, wherein the metallic salt compound causes a color variation by dissolution-deposition of a metal element; and multi-color display of substantially 3 or more colors comprising black display, white display and colored display other than black are carried out by a driving operation of the opposite electrodes, wherein a coloring overvoltage (VECW) and the decoloring overvoltage (VECE) of an electrochromic dye, and the deposition overvoltage (VAgW) and the dissolution overvoltage (VAgE) of silver of a silver salt compound satisfy all the conditions defined by following Relational expression (X): VECW absolute value>VECE absolute value VECW absolute value>VAgE absolute value VAgW absolute value>VECE absolute value VAgW absolute value>VAgE absolute value. Relational expression (X).