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Polymer-dispersed liquid crystal device having an ultraviolet-polymerizable matrix and a variable optical transmission and a method for preparing same

  • US 5,867,238 A
  • Filed: 08/19/1996
  • Issued: 02/02/1999
  • Est. Priority Date: 01/11/1991
  • Status: Expired due to Fees
First Claim
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1. A liquid crystal-containing sandwich construction comprising:

  • a first flexible, polymeric substrate having an electrode material on one major surface thereof;

    a second flexible, polymeric substrate having an electrode material on one major surface thereof, the major surfaces of the first and second substrates having electrode material thereon being in a facing relationship; and

    a liquid crystal-containing layer comprising a liquid crystal material blended with an ultraviolet radiation polymerizable liquid medium, the layer being disposed between the major surfaces of the first and second substrates having electrode material thereon;

    wherein the sandwich construction is free from mechanical spacers that separate the major surfaces of the first and second substrates and control the thickness of the liquid crystal-containing layer therebetween.

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