Electro-optic rearview mirror for automotive vehicles

  • US 5,808,778 A
  • Filed: 10/11/1996
  • Issued: 09/15/1998
  • Est. Priority Date: 10/20/1995
  • Status: Expired due to Fees
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First Claim
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1. An electro-optically dimming rearview mirror for motor vehicles, said mirror comprising, in combination, front and rear spaced elements, said front element and said rear element defining a chamber therebetween, said front element being transparent, the side of such front element confronting said rear element including transparent electrically conductive means, the side of said rear element confronting said front element including means providing electrically conductive functions, said chamber containing an electro-optic reversibly variable transmittance medium in contact with said transparent electrically conductive means on said front element and said means providing electrically conductive functions on said rear element, means providing light reflective functions on said rear element effective to reflect light through said medium and through said front element when said light reaches said means providing light reflective functions after passing through said medium and through said front element, said electro-optic reversibly variable transmittance medium in a darkened state being effective to transmit visible light in the orange, red and near infrared wavelengths above 585 nanometers and to simultaneously partially absorb visible light in the blue and green wavelengths below 585 nanometers whereby the average transmittance of light in the orange, red and near infrared wavelengths above 585 nanometers is greater than the average transmittance of light in the blue and green wavelengths below 585 nanometers, and means for applying electrical potential to said electro-optic medium to cause variations in the light transmittance of said electro-optic medium.

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