Photosensor system and drive control method thereof

H - Electricity – 04 – N

Patent

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H04N 3/15 (2006.01)

Patent

CA 2352312

A photosensor system including a photosensor array having a plurality of photosensors arranged two-dimensionally comprises a driver circuit and a readout circuit for applying signal voltages to each photosensor, and also a control circuit having a function of controlling the voltages applied to each photosensor and adjusting the sensitivity of each photosensor. During an image reading operation and a reading operation for setting the sensitivity of each photosensor, a correction signal is generated, which has an effective voltage that can adjust an effective voltage, applied to each gate electrode of each photosensor, to 0 V, or to a value that minimizes degradation of the characteristics of each photosensor. This correction signal is applied to each gate electrode.

L'invention se rapporte à un système à photocapteurs comportant un réseau de photocapteurs ayant une pluralité de photocapteurs disposés dans un plan. Ledit système comprend un circuit d'attaque et un circuit de lecture conçu pour appliquer des tensions de signaux à chaque photocapteur, et également un circuit de commande ayant une fonction de régulation des tensions appliquées à chaque photocapteur et d'ajustement de la sensibilité de chaque photocapteur. Lors d'une opération de lecture d'image et d'une opération de lecture destinée à fixer la sensibilité de chaque photocapteur, un signal de correction est généré, ledit signal ayant une tension efficace susceptible d'ajuster une tension efficace appliquée à chaque électrode de grille de chaque photocapteur, à une valeur de 0 V ou à une valeur qui minimise la dégradation des caractéristiques de chaque photocapteur. Ce signal de correction est appliqué à chaque électrode de grille.

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