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C - Chemistry, Metallurgy

09

K

C09K 19/04 (2006.01) C09K 19/58 (2006.01) G02F 1/13 (2006.01) G02F 1/133 (2006.01) G09F 9/35 (2006.01)

Patent

CA 2527997

A cholesteric display including a liquid crystalline mixture having a dipolar dopant dissolved in the liquid crystalline mixture and the resulting mixture is reflecting light in the visible range of the spectrum when in planar state. In accordance with another aspect, a process includes forming a composition with a dipolar molecule to result in a liquid crystal dipolar dopant, and liquid crystal is added to the composition. In accordance with still another aspect, a device includes a liquid crystal composition includes a cholesteric liquid and a dipolar dopant. The liquid crystal composition is switchable between a focal-conic state and a planar state in the presence of an electric field and is stable in the respective state when the electric field is removed.

Affichage cholestérique comprenant un mélange cristallin liquide ayant un dopant dipolaire dissous dans le mélange liquide cristallin, le mélange résultant réfléchissant la lumière dans la plage visible du spectre lorsqu'il est dans un état planaire. Selon un autre aspect, un procédé consiste à former une composition avec une molécule dipolaire pour obtenir un dopant dipolaire à cristaux liquides, et à ajouter un cristal liquide à la composition. Selon un autre aspect, un dispositif qui comprend une composition de cristaux liquides comprend un liquide cholestérique et un dopant dipolaire. La composition de cristaux liquides peut être commuté entre un état focal- conique et un état planaire en présence d'un champ électrique et est stable dans l'état respectif lorsque le champ électrique est retiré.

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