High efficiency chiral nematic liquid crystal rear polarizer...

G - Physics – 02 – F

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G02F 1/1335 (2006.01) G02B 5/30 (2006.01) G02B 27/28 (2006.01) G02F 1/13357 (2006.01)

Patent

CA 2107952

The efficiency of LC displays is improved by the use of a polymeric chiral nematic liquid crystal rear polarizer and reflective backlight housing which increases the net transmission of light and, at the same time, reduces the weight of the assemblage and increases battery life by utilizing lower levels of illumination. The polymeric chiral nematic liquid crystal can be a freestanding film or films, or can be supported by a single glass substrate. The liquid crystal polarizer can have a bandwidth sufficient to transmit electromagnetic radiation across the entire visible spectrum.

Le rendement des afficheurs à cristaux liquides peut être amélioré par l'utilisation d'un polariseur arrière à cristaux liquides nématiques chiraux polymériques et d'un logement réfléchissant qui augmente la transmission de la lumière et, en même temps, réduit le poids de l'ensemble et prolonge la durée de vie des piles en utilisant des niveaux d'éclairage plus faibles. Les cristaux liquides nématiques chiraux polymériques peuvent être constitués d'une ou de plusieurs couches minces libres, ou peuvent être portés par un seul substrat de verre. Le polariseur à cristaux liquides peut avoir une largeur de bande suffisante pour transmettre le rayonnement électromagnétique sur toute l'étendue du spectre visible.

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