Sealed electrochromic device

  • US 5,136,419 A
  • Filed: 12/13/1991
  • Issued: 08/04/1992
  • Est. Priority Date: 03/06/1990
  • Status: Expired due to Fees
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First Claim
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1. In an improved electrochromic device comprising a plurality of layers on one side of a backing, the layers generally comprising an electronically conducting layer, an electrochromic layer, an ion conducting layer and a counter electrode layer, wherein the improvement comprises:

  • (a) a panel, the panel juxtaposed substantially biplanar and spaced away from the one side of the backing and the layers thereon leaving a space volume between the panel and the layers; and

    (b) means for sealing the panel with the backing so that at least a portion of the space volume is sealed between the panel and the backing to form a sealed space volume;

    (c) a mixture of an inert gas and the vapor of a high dielectric constant material positioned in the sealed space volume, the mixture having an oxygen content of less than 10 percent.

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