Vehicular rearview mirror elements and assemblies incorporating these elements

  • US 7,719,750 B2
  • Filed: 05/27/2008
  • Issued: 05/18/2010
  • Est. Priority Date: 09/30/2002
  • Status: Active Grant
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First Claim
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1. A variable reflectance mirror assembly, comprising:

  • a first substantially transparent substrate having first and second surfaces, the first substrate including a substantially transparent layer of material on at least a portion of the second surface;

    a second substrate having third and fourth surfaces, the second substrate including at least one at least partially reflective layer on at least a portion of the third surface;

    a first electrical contact electrically connected to said substantially transparent layer of material;

    a second electrical contact electrically connected to said at least one at least partially reflective layer;

    an electrochromic material positioned between said first substantially transparent substrate and said second substrate, the electrochromic material having a light transmittance that is variable as a function of voltage applied between the first and second electrical contacts; and

    an electrical circuit configured to insure that said first electrical contact is maintained as an anode and said second electrical contact is maintained as a cathode.

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