Multi-cell electrochromic devices

  • US 7,450,291 B2
  • Filed: 07/10/2007
  • Issued: 11/11/2008
  • Est. Priority Date: 01/28/2005
  • Status: Active Grant
First Claim
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1. A multi-cell electrochromic device, comprising:

  • a first substrate which comprises a first side and a second side, wherein the first and second sides include electrically conductive material associated therewith;

    a second substrate having an electrically conductive material associated therewith;

    a first electrochromic medium contained within a first chamber positioned between the first and second substrates, wherein the first 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 third substrate having an electrically conductive material associated therewith;

    a second electrochromic medium contained within a second chamber positioned between the first and third substrates, wherein the second 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 multi-cell electrochromic device exhibits a transmittance of less than approximately 1.5% in a low transmission state.

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