Active matrix liquid crystal display device

G - Physics – 02 – F

Patent

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Details

G02F 1/1343 (2006.01) G09G 3/36 (2006.01)

Patent

CA 2116693

A device comprising a thin liquid crystal layer (10) between a planar counterelectrode and control electrodes each defining a capacitor and a picture element with the counterelectrode, and being arranged such that each picture element corresponds to a row and a column. Each control electrode is connected to a control element such as a thin-film transistor which sets it at the potential of a conductor common to all the elements in the column to which it belongs, or isolates it and allows its potential to float. The counterelectrode consists of two fractions (201, 202) provided with devices for setting them at different potentials, and reversed at each frame or multiple of the frame frequency. Two adjacent columns (or two groups of a number of columns) of control electrodes interact with different fractions.

2116693 9401801 PCTABS00165 Le dispositif comprend une couche mince (10) de cristaux liquides disposée entre une contre-électrode plane et des électrodes de commande définissant chacune un condensateur et un élément d'image avec la contre-électrode, disposées de telle sorte que chacun des points de l'image corresponde à une ligne et une colonne, chaque électrode de commande étant reliée à un élément de commande, tel qu'un transistor en couche mince, permettant ou bien de la porter au potentiel d'un conducteur qui est commun à tous les éléments de la colonne à laquelle elle appartient, ou bien de l'isoler et de rendre son potentiel flottant. La contre-électrode est constituée de deux fractions 201, 202 munies de moyens permettant de les porter à des potentiels différents, inversées à chaque trame ou un multiple de la fréquence trame et dans lequel deux colonnes (ou deux groupes de quelques colonnes) successives d'électrodes de commande coopèrent avec des fractions différentes.

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