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Electrochromic mirror with two thin glass elements and a gelled electrochromic medium

  • US 20030112489A1
  • Filed: 04/03/2002
  • Published: 06/19/2003
  • Est. Priority Date: 04/02/1997
  • Status: Active Grant
First Claim
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1. An electrochromic variable reflectance mirror for motor vehicles, comprising thin front and rear spaced elements, each having front and rear surfaces;

  • a layer of transparent conductive material disposed on said rear surface of said front element;

    a reflector disposed on one side of said rear element provided that, if said reflector is on said rear surface of said rear element, then said front surface of said rear element contains a layer of a transparent conductive material, and a perimeter sealing member bonding together said front and rear spaced elements in a spaced-apart relationship to define a chamber therebetween, where said chamber contains a free-standing gel comprising a solvent and a crosslinked polymer matrix, and where said chamber further contains at least one electrochromic material in solution with said solvent and, as part of said solution, interspersed in said crosslinked polymer matrix;

    where said polymer matrix cooperatively interacts with said front and rear elements to form one thick, strong unitary member, and where said reflector material is effective to reflect light through said chamber and said front element when said light reaches said reflector after passing through said front element and said chamber.

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