Switchable electrochromic devices for use in aircraft transparency windows

  • US 6,783,099 B2
  • Filed: 05/12/2003
  • Issued: 08/31/2004
  • Est. Priority Date: 08/03/2000
  • Status: Active Grant
First Claim
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1. An electrochromic aircraft window assembly comprising:

  • a) an outboard pane assembly; and

    b) a fog preventing electrochromic pane assembly spaced from said outboard pane assembly and defining a chamber therebetween, said fog preventing electrochromic pane assembly comprising;

    i) a first substrate having a first surface including a first conductive coating and a second surface including a second conductive coating;

    ii) a second substrate spaced from said first substrate, said second substrate having a first surface including a third conductive coating, said second surface of said first substrate and said first surface of said second substrate facing each other in spaced-apart relation to define a chamber therebetween;

    iii) an electrochromic medium contained in said chamber and in contact with said second and said third conductive coatings, said electrochromic medium having a luminous transmittance that varies upon application of an electrical potential through said electrochromic medium;

    iv) facilities for applying electrical current to said first conductive coating to heat said first conductive coating, thereby preventing fogging of said window assembly; and

    v) facilities for applying electrical current to said second and said third conductive coatings to establish said electrical potential through said electrochromic medium and vary said variable luminous transmittance of said electrochromic medium.

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