Patent ID: 6961168

Claim:
An electrochromic device suitable for use as an rear-view mirror comprising a first substrate comprising a first surface coated with a transparent conductor; a second substrate comprising a second surface coated with a second conductor, said second substrate positioned in a substantially parallel relationship with said first substrate and spaced apart from said second substrate by a distance of less than about 250 microns, said first surface facing said second surface, said device further comprising an electrochromic medium disposed between said first substrate and said second substrate, whereby the transmission of light through said electrochromic medium is changed when an electric potential is applied thereto and wherein the resistivity of at least one of said conductors is greater than 20 ohms/square, said electrochromic device having a coloring speed and a bleaching speed of less than 60 seconds at temperature of from about 23 degrees Celsius to about 27 degrees Celsius, wherein said electrochromic medium comprises at least one bridged dye comprising at least one anodic moiety and one cathodic moiety.