Patent ID: 7256924

Claim:
A multi-cell electrochromic device, comprising: a first electrochromic device sub-assembly comprising: a first substantially transparent substrate having an electrically conductive material associated therewith; a second substrate having an electrically conductive material associated therewith; and an electrochromic medium contained within a chamber positioned between the first and second substrates, wherein the electrochromic medium comprises: at least one solvent; at least one anodic electroactive material; at least one cathodic electroactive material; and wherein at least one of the anodic and cathodic electroactive materials is electrochromic; a second electrochromic device sub-assembly comprising: a first substantially transparent substrate having an electrically conductive material associated therewith; a second substrate having an electrically conductive material associated therewith; and an electrochromic medium contained within a chamber positioned between the first and second substrates, wherein the electrochromic medium comprises: at least one solvent; at least one anodic electroactive material; at least one cathodic electroactive material; and wherein at least one of the anodic and cathodic electroactive materials is electrochromic; and wherein the first and second electrochromic device sub-assemblies are in optical alignment, and wherein the multi-cell electrochromic device exhibits a transmittance of less than approximately 1.5% in a low transmission state.