Driving device, display apparatus using the same, and...

G - Physics – 09 – G

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G09G 3/32 (2006.01) G09F 9/33 (2006.01) G09G 3/22 (2006.01)

Patent

CA 2463653

A driving device which supplies a current to a plurality of currentdriven optical elements (Ep) to drive the optical elements includes at least a driving current supply circuit (133) which supplies a driving current to each optical element for a predetermined period, and a control voltage applying circuit (132) which applies a charge voltage having a voltage value corresponding to a voltage to be applied to each optical element using the driving current, before the driving current is supplied. The driving current supply circuit (133) includes a single constant current generating circuit (10A, 10B, 10C) which outputs a constant current having the same current value as that of a driving current, and a plurality of current storage circuits (30A, 30B, 30C) which sequentially receive and hold the constant current and output the driving current on the basis of the constant current.

La présente invention concerne un dispositif d'excitation qui fournit un courant à une pluralité d'éléments optiques excités par le courant (Ep) afin de commander lesdits éléments optiques. Le dispositif précité comprend au moins un circuit d'alimentation en courant d'excitation (133) qui fournit un courant d'excitation à chaque élément optique pendant une période prédéterminée, et un circuit d'application d'une tension de commande (132) qui applique une tension de charge possédant une valeur de tension correspondant à une tension devant être appliquée à chaque élément optique commandé par le courant d'excitation, avant que le courant d'excitation ne soit distribué. Le circuit d'alimentation en courant d'excitation (133) comprend un unique circuit de production de courant constant (10A, 10B, 10C) qui produit un courant constant possédant la même valeur de courant que le courant d'excitation, et une pluralité de circuits de stockage de courant (30A, 30B, 30C) qui reçoivent séquentiellement et conservent le courant constant, et produisent le courant d'excitation sur la base du courant constant. ? ¿

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