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Electro-optic element with high double image ratio

  • US 10,247,995 B2
  • Filed: 07/14/2017
  • Issued: 04/02/2019
  • Est. Priority Date: 07/15/2016
  • Status: Active Grant
First Claim
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1. A variable transmittance electro-optic assembly, comprising:

  • a first partially reflective, partially transmissive substrate defining a first surface and a second surface;

    a second partially reflective, partially transmissive substrate defining a third surface and a fourth surface, wherein the first substrate and the second substrate are configured to be held in a parallel spaced apart relationship and sealed about a perimeter of the first and second substrates;

    an electro-optic material positioned between the second surface and the third surface, wherein the electro-optic assembly includes a principle transflector having a transflector coating on at least one of first and second surfaces, wherein the principle transflector includes narrow reflectance bands corresponding to narrow display light output bands; and

    low reflectance coatings disposed on secondary surfaces of said variable transmittance electro-optic assembly, such that the electro-optic assembly has a high double image characteristic defined by a ratio of a reflectance of the transflector coating to a net reflectance of at least one of the secondary surfaces, and further wherein the ratio is greater than 50.

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