Multi-cell electrochromic devices

  • US 7,256,924 B2
  • Filed: 01/30/2006
  • Issued: 08/14/2007
  • Est. Priority Date: 01/28/2005
  • Status: Active Grant
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First Claim
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1. 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.

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