Vehicular mirror reflective element with electrochromic film

  • US 9,669,764 B2
  • Filed: 10/10/2014
  • Issued: 06/06/2017
  • Est. Priority Date: 10/16/2013
  • Status: Active Grant
First Claim
Patent Images

1. A mirror reflective element for a rearview mirror assembly for a vehicle, said mirror reflective element comprising:

  • a glass substrate;

    an electrochromic film provided as a pre-cut mirror shape, wherein said electrochromic film is disposed at said glass substrate;

    wherein said electrochromic film comprises an electrochromic polymer layer that provides a variable transmission of light in response to a voltage applied thereto;

    wherein said electrochromic polymer layer is disposed between a front polymeric film and a rear polymeric film, wherein said front polymeric film is flexible and has a thickness dimension of at least about 250 microns and wherein said rear polymeric film is flexible and has a thickness dimension of at least about 250 microns;

    wherein said front polymeric film is disposed between said electrochromic polymer layer and said glass substrate and wherein a transparent electrically conductive coating is disposed between said front polymeric film and said electrochromic polymer layer, said transparent electrically conductive coating being in electrical conductive contact with said electrochromic polymer layer;

    wherein an electrically conductive coating is disposed between said rear polymeric film and said electrochromic polymer layer, said electrically conductive coating being in electrical conductive contact with said electrochromic polymer layer;

    wherein said front polymeric film of said pre-cut mirror shape has a front overhang portion that extends outboard of any portion of said rear polymeric film and said electrochromic polymer layer at a first connecting region of said mirror reflective element for electrical connection to said transparent electrically conductive coating outboard of said perimeter seal;

    wherein said rear polymeric film of said pre-cut mirror shape has a rear overhang portion that extends outboard of any portion of said front polymeric film and said electrochromic polymer layer at a second connecting region of said mirror reflective element for electrical connection to said electrically conductive coating outboard of said perimeter seal; and

    a mirror reflector disposed rearward of said electrochromic polymer layer, wherein said mirror reflector is at least partially reflective.

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