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Architectural electrochromic pane

  • US 5,657,149 A
  • Filed: 05/20/1993
  • Issued: 08/12/1997
  • Est. Priority Date: 05/21/1992
  • Status: Expired due to Fees
First Claim
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1. An electrically controllable solar building pane, comprising:

  • a) an external electrochromic first panel comprising;

    i) a first glass sheet;

    ii) an electrochromic stack of functional films comprising;

    a'"'"') a transparent electrically conducting film;

    b'"'"') a cathodic electrochromic material film;

    c'"'"') an ion-conducting organic polymer film;

    d'"'"') an anodic electrochromic material film; and

    e'"'"') a transparent electrically conducting film;

    iii) a second glass sheet; and

    b) a second panel,wherein said electrochromic stack of functional films are laterally isolated from the outside by a succession of at least three sealing joints located entirely between said first glass sheet and said second panel, at least two of said three sealing joints are chemically different materials, said first and second panels are spaced apart by a layer of intermediate gas, said first glass sheet is a laminated pane comprising at least two glass sheets bonded together by an organic polymer which is filtering to ultra-violet radiation, said first glass sheet or said second glass sheet comprises an electrically conducting screen-printed region, wherein said screen-printed region is protected by a film of electrically non-conducting enamel, and wherein said building pane has a light transmission TL in the range of 7 to 51% and a solar factor in the range of 0.15 to 0.44 when said electrically controllable building pane is in the on-state and off-state, respectively.

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