High aperture amlcd architecture

G - Physics – 02 – F

Patent

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G02F 1/136 (2006.01) G02F 1/1362 (2006.01) G09F 9/35 (2006.01) G02F 1/1335 (2006.01) G02F 1/1343 (2006.01)

Patent

CA 2189869

An approach for constructing active matrix liquid crystal light valves having very high aperture ratio is described. This is achieved by burying the pixel addressing elements beneath a planarized array of nearly contiguous pixel electrodes and minimizing the footprint of opaque structures in the light valve. Undesirable field-induced disclinations and deformations of the liquid crystal are minimized by shielding the addressing structures with the pixel electrodes. Embodiments are provided which utilize the approach to improve transmittance, image quality, yield, design flexibility and functionality of the display.

L'invention se rapporte à une approche permettant de fabriquer des modulateurs de lumière à cristaux liquides et à matrice active présentant un taux d'ouverture très élevé. On obtient ceci en enfouissant les éléments d'adressage de pixels sous un réseau aplani d'électrodes de pixels quasi contigus et en minimisant la zone de couverture des structures opaques du modulateur de lumière. Des déformations et des désinclinaisons indésirables des cristaux liquides, induites par un champ, sont minimisées par le blindage des structures d'adressage avec les électrodes de pixels. Des modes de réalisation décrits font appel à cette approche pour améliorer le facteur de transmission, la qualité de l'image, le rendement, la souplesse de conception et les caractéristiques fonctionnelles de l'affichage.

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