Liquid crystal display device and use of retardation film...

Details Liquid crystal display device and use of retardation film... Liquid crystal display device and use of retardation film...

G - Physics

02

B

G02B 5/30 (2006.01) G02F 1/13363 (2006.01) G02F 1/139 (2006.01)

Patent

CA 2434069

The present invention provides a liquid crystal display device of VA mode having decreased leakage of light over a wide range and giving a clear and almost achromatic black display by using a retardation film A having smaller retardation with shorter wavelength in combination with a retardation film C having larger retardation with shorter wavelength. Accordingly, a high-quality liquid crystal display device having excellent picture quality can be produced by the present invention.

L'invention concerne un élément d'affichage à cristaux liquides en mode VA, dans lequel la fuite de lumière est réduite sur l'ensemble de la bande large. Un écran noir est conçu de manière à être net et sensiblement achrome par utilisation d'une combinaison d'un film de déphasage (A) dans lequel le déphasage diminue à mesure que la longueur d'ondes se réduit et d'un film de déphasage (C) dans lequel le déphasage augmente à mesure que la longueur d'ondes se réduit. Ces mesures permettent d'obtenir un dispositif d'affichage à cristaux liquides de haute qualité présentant une excellente qualité d'image.

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