Liquid crystal display device using ocb cell and driving...

Details Liquid crystal display device using ocb cell and driving... Liquid crystal display device using ocb cell and driving...

G - Physics

02

F

G02F 1/133 (2006.01) G02F 1/139 (2006.01) G09G 3/36 (2006.01) G09G 3/34 (2006.01)

Patent

CA 2384992

A liquid crystal display device capable of suppressing the occurrence of a back transition in OCB cells and displaying excellent images as well as a driving method thereof are provided. One frame period has a first period P1 for writing a signal for initializing the state of a liquid crystal in pixel cells and a second period for writing pixel data in correspondence with an image signal in pixel cells, and a voltage level to be applied to each pixel cell is set in the first period such that each pixel cell retains a voltage Vsup higher than that in the second period.

L'invention porte sur un affichage à cristaux liquides et sur son procédé de commande selon lequel il est possible de supprimer la transition inverse dans une cellule OCB et d'afficher une bonne image. Une période de trame comprend une première période P1 pour laquelle un signal initialisant l'état des cristaux liquides est enregistré dans une cellule de pixel, et une seconde période P2 pour laquelle des données d'image correspondant à un signal vidéo sont enregistrées dans la cellule de pixel. La première période comprend une période de retenue Vsup durant laquelle chaque cellule de pixel garde un potentiel Vsup de niveau supérieur appliqué à chaque cellule de pixel supérieure à celle de la seconde période.

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