Liquid crystal display device and preparation and use thereof

G - Physics – 02 – F

Patent

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Details

G02F 1/1347 (2006.01) C09K 19/38 (2006.01) C09K 19/40 (2006.01) C09K 19/42 (2006.01) C09K 19/54 (2006.01) G02F 1/1334 (2006.01) G08G 1/09 (2006.01)

Patent

CA 2079801

The invention relates to a liquid crystal display device having a pair of electrodes, at least one of which is transparent, and a liquid crystal film sandwiched between the electrodes. The film is a mixture of a side chain type liquid crystalline polymer and at least two low molecular weight liquid crystals, the film containing 0.005 to 1 % by weight of an electrolyte based on the total weight of the film. This liquid crystal device has a high response speed and memory and can be used, for example, as the display in a variable traffic control sign, as a light-adjusting window, as a liquid crystal glare-proof mirror, or the like.

La présente invention a pour objet un dispositif d'affichage à cristaux liquides comportant une paire d'électrodes, au moins une de ces électrodes étant transparente, ainsi qu'un film de cristaux liquides en sandwich entre les électrodes. Le film est composé d'un mélange de polymère à cristaux liquides de type à chaîne latérale et d'au moins deux cristaux liquides à faible masse moléculaire, le film contenant entre 0,005 et 1 % en poids d'un électrolyte, en fonction de la masse totale du film. Ce dispositif à cristaux liquides offre une haute vitesse de réponse et une grande capacité de mémoire et peut être utilisé, par exemple, comme dispositif d'affichage d'informations concernant la circulation routière, comme fenêtre photochromique, dans les miroirs antireflets à cristaux liquides, et autres applications semblables.

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