Electrochromic medium capable of producing a pre-selected color

  • US 6,020,987 A
  • Filed: 04/02/1997
  • Issued: 02/01/2000
  • Est. Priority Date: 04/02/1997
  • Status: Expired due to Term
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First Claim
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1. An electrochromic device, comprising:

  • 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 and said front surface of said rear element, and a perimeter sealing member bonding together said front and rear spaced elements in a spaced-apart relationship to define a chamber therebetweenwhere said chamber contains an electrochromic medium, said electrochromic medium comprising at least three electroactive materials, at least two of which are electrochromic, where said medium generally maintains a pre-selected perceived color throughout the normal voltage range of said electrochromic device.

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