3-d hlcd system and method of making

G - Physics – 02 – B

Patent

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Details

G02B 5/32 (2006.01) G02B 27/22 (2006.01) G02F 1/1335 (2006.01) G03H 1/26 (2006.01) G02F 1/13357 (2006.01)

Patent

CA 2418760

The invention is directed to an autostereoscopic three-dimensional liquid crystal display system and a method of making the system. The system comprises a collimated backlight (12), a first light diffracting hologram (16), a second right-left interlacing hologram (18) and a liquid crystal display. If the backlight is not collimated, a micro-collimator array (14) is used to collimate the backlight prior to passing into the first hologram. The second right-left interlacing hologram is formed through a two step process. The process comprises positioning a photolithographic mask (44) and a view region mask (52) in a first position, recording the first holographic recording in the first position, shifting the photolithographic mask (44) and the view region mask (52) to a second position and recording the second holographic recording in the second position.

L'invention concerne un système d'affichage à cristaux liquides tridimensionnel, autostéréoscopique, et son procédé de réalisation. Ce système comprend une lumière arrière (12) collimatée, un premier hologramme (16), qui sert à la diffraction de la lumière, un second hologramme (18), qui sert à l'entrelacement droite-gauche et un affichage à cristaux liquides. Si la lumière arrière n'est pas collimatée, une matrice de microcollimateurs (14) est utilisée pour collimater la lumière arrière avant son passage à travers le premier hologramme. Le second hologramme, qui sert à l'entrelacement droite-gauche, est formé selon un procédé en deux étapes qui consiste à placer un masque photolithographique (44) et un masque de zone de vision (52) dans une première position, à réaliser le premier enregistrement holographique dans cette première position, à décaler le masque photolithographique (44) et le masque de zone de vision (52) pour leur faire prendre une seconde position, et à effectuer le second enregistrement holographique dans cette seconde position.

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