Power saving circuit and method for driving an active matrix...

G - Physics – 09 – G

Patent

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G09G 3/36 (2006.01)

Patent

CA 2302230

Switches and capacitors are efficiently used to passively change the voltage level on column electrodes without active driving by the column driver circuit. This significantly reduces the power needed by the column driver circuit to drive voltages of alternating polarity onto the column electrodes. In this way, significant power is saved in both the pixel inversion and the row inversion schemes. The average power savings of various of the embodiments exceeds 50 % compared with a simple conventional implementation of a column driver circuit. Another aspect similarly reduces the power used by the column driver circuit in the back plane switching scheme.

Des commutateurs et des condensateurs sont utilisés de façon satisfaisante pour faire changer passivement le niveau de tension dans des électrodes de colonne sans commande active par le circuit de commande de colonne. Cela réduit considérablement l'énergie nécessaire au circuit de commande de colonne pour commander des tensions à alternance de polarité aux électrodes de colonne. De cette façon, on économise une énergie considérable aussi bien pour les logiques d'inversion de pixels que pour les logiques d'inversion de rangées. Les économies d'énergie moyennes de divers modes de réalisation dépassent 50 % par rapport à une réalisation classique simple d'un circuit de commande de colonne. Un autre aspect réduit de façon similaire l'énergie utilisée par le circuit de commande de colonne dans la logique de commutation du fond de panier.

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