Color-stabilized electrochromic devices

  • US 6,188,505 B1
  • Filed: 08/19/1999
  • Issued: 02/13/2001
  • Est. Priority Date: 08/19/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. An electrochromic medium for use in a normally operating electrochromic device, comprising:

  • an anodic material and a cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic; and

    an additive, wherein the additive is more easily reduced than the cathodic material, and wherein the additive substantially precludes the formation of a residual reduced cathodic material while the electrochromic medium is in a high transmission state.

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