Integrated analog source driver for active matrix liquid...

G - Physics – 09 – G

Patent

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G09G 3/36 (2006.01)

Patent

CA 2228213

A source driver for an active matrix liquid crystal display, comprising a sample-and-hold circuit for sampling successive lines of an input video signal, a source follower for applying successive lines of the input video signal sampled by the sample-and-hold circuit to successive source lines of the active matrix crystal display, the source follower being characterized by a predetermined threshold voltage; a reset circuit for resetting the successive source lines after respective ones of the successive lines of the input video signal; and an autozero circuit for cancelling the threshold voltage from the video signal so that variations in the threshold voltage do not affect the video signal applied to the successive source lines.

Module de commande pour écran à cristaux liquides, à matrice active comprenant un circuit échantillonneur-bloqueur qui échantillonne les lignes successives d'un signal vidéo d'entrée et un suiveur de source qui fait correspondre les lignes successives du signal vidéo d'entrée échantillonné par le circuit échantillonneur-bloqueur à des lignes de source de l'écran à cristaux liquides, à matrice active. Le suiveur de source se caractérise par une tension de seuil prédéterminée, par un circuit de remise à l'état initial des lignes de source successives à la suite des lignes successives correspondantes du signal vidéo d'entrée et par un circuit à réglage automatique du zéro qui annule la tension de seuil du signal vidéo de façon que les variations de cette tension n'affectent pas le signal vidéo appliqué aux lignes de source successives.

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