A display device employing an oxide based anodic electrochromic material. By reactive ion plating iridium, rhodium or nickel in an atmosphere including oxygen and water vapor, an anodic electrochromic film exhibiting a good contrast ratio can be obtained. This film can independently be an element of...http://www.google.com/patents/US4451498?utm_source=gb-gplus-sharePatent US4451498 - Method for making oxide based electrochromic display devices
