Reduced near-infrared radiation transmitting ultraviolet protected, safety protected, electrochromic vehicular glazing

  • US 5,523,877 A
  • Filed: 08/19/1994
  • Issued: 06/04/1996
  • Est. Priority Date: 02/12/1988
  • Status: Expired due to Term
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First Claim
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1. A reduced near-infrared radiation transmitting, reduced ultraviolet radiation transmitting, safety-protected electrochromic vehicular glazing assembly wherein said assembly is one of a vehicle window, a vehicle sunroof, a vehicle sun visor, and a vehicle shade band, said assembly comprising:

  • first and second spaced, optically transparent, glass elements, said elements having facing surfaces defining a space between said first and second elements;

    an electrochromic medium confined in said space whose light transmittance is variable upon the application of an electric field thereto;

    means for applying an electric field to said electrochromic medium to cause variation in the light transmittance of said medium;

    ultraviolet radiation reducing means incorporated in said assembly for reducing ultraviolet radiation degradation of said electrochromic medium in said assembly and for reducing ultraviolet radiation transmittance through said assembly;

    near-infrared reflective means located on at least one of said first and second elements for reducing the transmission of near-infrared radiation through said glazing assembly, said reflective means incorporating at least one semitransparent, elemental, thin metal film; and

    safety means incorporated in said assembly for preventing injury upon impact to said assembly, said safety means comprising at least one of a tear-resistant, resilient polymeric layer positioned on a surface of one of said glass elements for preventing fragment scattering, lacerative injuries, and contact with said electrochromic medium should one of said glass elements break or crack, and a tempered, safety glass panel forming one of said glass elements.

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