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

  • US 5,940,201 A
  • Filed: 04/02/1997
  • Issued: 08/17/1999
  • Est. Priority Date: 04/02/1997
  • Status: Expired due to Term
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First Claim
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1. An electrochromic variable reflectance mirror for motor vehicles, comprising:

  • front and rear spaced elements, each having front and rear surfaces and each having a thickness ranging from about 0.5 mm to about 1.5 mm;

    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;

    where said polymer matrix cooperatively interacts with said front and rear elements, and where said reflector 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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