Nematic liquid crystal bistable display device with grey level

Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only

Reexamination Certificate

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C349S033000, C349S177000

Reexamination Certificate

active

10476863

ABSTRACT:
The present invention relates to a nematic bistable display device, characterized in that it comprises control means (40) for producing, after the anchoring is broken, hybrid textures in which two bistable textures coexist in a controlled proportion within the same pixel, these being separated by 180° volume disclination lines or by 180° reorientation walls on one of the surfaces, and means (40) for the long-term stabilization of the hybrid textures by transformation of the volume lines into surface walls and the immobilization of these walls on the surface.

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