Electro-optic system configured to reduce a perceived color change

  • US 8,964,278 B2
  • Filed: 04/18/2013
  • Issued: 02/24/2015
  • 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 that said second surface and said third surface face one another; and

    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 sensor device in optical communication with said electrochromic element;

    wherein light passing through said electrochromic element and received by said sensor device has at least a first primary and a second primary, and said first and second primaries each having a first hue (hab) when received by said sensor device through said electrochromic element in approximately said high transmittance state and a second hue (hab′

    ) when viewed through said electrochromic element in approximately 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.

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