Nematic liquid crystal bistable display device with grey level

Details Nematic liquid crystal bistable display device with grey level Nematic liquid crystal bistable display device with grey level

G - Physics

02

F

G02F 1/139 (2006.01) G02F 1/141 (2006.01)

Patent

CA 2446286

The invention concerns a bistable nematic display device characterised in that it comprises control means (40) for producing, after anchoring fracture, mixed textures wherein two bistable textures coexist in controlled proportion in a common pixel, separated by 180· volume disinclination lines or by 180· reorientation walls on one of the surfaces, and means (40) for long-term stabilisation of the mixed textures by transformation of the volume lines into surface walls and immobilisation of said walls on the surface.

La présente invention concerne un dispositif nématique d'affichage bistable caractérisé par le fait qu'il comprend des moyens de contrôle (40) pour réaliser, après une cassure d'ancrage, des textures mixtes où deux textures bistables coexistent en proportion contrôlée dans un même pixel, séparées par des lignes de disinclinaison 180~ en volume ou par des murs de réorientation 180~ sur une des surfaces, et des moyens (40) de stabilisation à long terme des textures mixtes par transformation des lignes de volume en murs de surface et l'immobilisation de ces murs sur la surface.

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