Electrochromic display cell

Claim 1

The electrochromic display cell, comprising a first transparent wall, at least one transparent conductive electrode on the inner surface thereof, a second wall opposed to and spaced apart from said first wall, a reflective metal selected from the group consisting of gold and silver on the interior surface of said second wall, an electrochromic material in solution between said opposing inner surfaces, said electrochromic material in solution being the sole electrochromic material in said cell, at least one contact region proximate the edge of said first wall, a transparent conductive lead connecting said electrode on said first wall with said contact region, and an insulating layer over at least a portion of said transparent conductive lead, said reflective metal having an area including at least that area immediately opposite said conductive electrode on said first wall, said electrode on said first wall and said reflective metal being connectable to an exterior source of voltage and said reflective metal being selected to be inert when rendered negative at the voltage necessary for erasing a display generated by making said transparent electrode negative.