Patents Assigned to Russian Technology Group
  • Patent number: 5739296
    Abstract: Polarizing coatings are formed from dyestuffs which provide a stable liquid crystalline phase in a wide range of concentrations, temperatures and pH-values. Particles formed by aggregates of the liquid crystal molecules are oriented in a predetermined direction to polarize light. The stability of the liquid crystalline state allows orienting the particles by mechanical forces such as a shearing force applied when the liquid crystal (10) is spread on a support surface (20) by a knife-like doctor (90) or a tension deformation force acting on the meniscus of the liquid crystal deposited between two surfaces (20, 30) as the surfaces are peeled off one another. As a result, the polarizing coatings are formed in some embodiments by simple methods. In some embodiments, the polarizing coatings have a high lightfastness, a high thermal stability, and a high dichroic ratio.
    Type: Grant
    Filed: November 20, 1995
    Date of Patent: April 14, 1998
    Assignee: Russian Technology Group
    Inventors: Khan Ir Gvon, Yuri A. Bobrov, Victor A. Bykov, Leonid Y. Ignatov, Tatiana D. Ivanova, Sergei I. Popov, Elena Y. Shishkina, Georgiy N. Vorozhtsov