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

  • US 6,545,794 B2
  • Filed: 12/23/2000
  • Issued: 04/08/2003
  • Est. Priority Date: 04/02/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. An electrochromic device, comprising:

  • a first glass element having an electrically conductive material associated therewith, wherein said first element comprises a height (h1) , a width (w1) , a thickness (t1), an inner surface, and an outer surface;

    a second glass element having an electrically conductive material associated therewith, wherein said second element comprises a height (h2) , a width (w2), and a thickness (t2), an inner surface, and an outer surface;

    a cell spacing (c) which comprises a distance between said inner surface of said first element and said inner surface of said second element;

    a gelled electrochromic medium contained within a chamber positioned between said first and second elements;

    wherein (h1), (w1), (t1), (h2), (w2), (t2), and (c) are numerical values in millimeters, wherein (t1) and (t2) having thickness of at least 0.5 mm; and

    wherein (h1), (w1), and (t1) of said first element, and (h2), (w2), and (t2) of said second element and (c) comprise numerical values such that the following inequality is satisfied;

    2

    h15

    (1-

    -2(h1/w1)2
    )
    t13

    (7.57×

    1012
    )
    +2

    h25

    (1-

    -2(h2/w2)2
    )
    t23

    (7.57×

    1012
    )


    .1

    (c).
    embedded image

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