Electro-optic system configured to reduce a perceived color change

  • US 9,709,869 B2
  • Filed: 09/13/2016
  • Issued: 07/18/2017
  • Est. Priority Date: 08/09/2010
  • Status: Active Grant
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First Claim
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1. An electrochromic system comprising:

  • an electrochromic element comprising;

    a front element comprising first and second surfaces;

    a rear element comprising third and fourth surfaces, wherein said front and rear elements are sealably bonded together in a spaced-apart relationship to define a chamber, such that said second surface and said third surface face one another;

    a transparent first electrode comprising a layer of conductive material carried on said second surface;

    an electrochromic medium contained in said chamber, wherein said electrochromic medium is adapted to be in at least a high transmittance state and a low transmittance state; and

    a partially transmissive, partially reflective second electrode; and

    a display device in optical communication with said electrochromic element, said display device comprising at least one light source,wherein said display device being configured to emit at least a first primary and a second primary, and said first and second primaries each having a first hue (hab) when viewed through said electrochromic element in said high transmittance state and a second hue (hab

    ) when viewed through said electrochromic element in said low transmittance state, wherein a change in said first and second hues (Δ

    hab) for both first and second primaries is less than approximately 31 degrees, andwherein the ratio of the intensities of the two primaries is held relatively constant by altering the display settings for the two transmittance states.

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