Electrophoretic displays and systems for addressing such...

G - Physics – 02 – F

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G02F 1/135 (2006.01) G04G 21/04 (2010.01) B41J 3/407 (2006.01) G02B 26/02 (2006.01) G02F 1/167 (2006.01) G09F 9/302 (2006.01) G09F 9/37 (2006.01) G02F 1/1333 (2006.01) G02F 1/1334 (2006.01) H01L 51/30 (2006.01)

Patent

CA 2320788

Electrophoretic displays include a light-emitting layer, a photoconductive layer, and an electrophoretic layer. The light-emitting layer may be an organic, light-emitting material, or organic, light-emitting diode, which is addressable using a multiplex addressing drive scheme. The impedance of the photoconductive layer is lowered when struck by light from the light-emitting layer. As a result of the lowered impedance of the photoconductive layer, the electrophoretic layer, which itself cannot be multiplexed, is addressed at a lower, subthreshold voltage.

L'invention porte sur des dispositifs d'affichage à électrophorèse qui comprennent une couche émettrice de lumière, une couche photoconductrice et une couche électrophorétique. La couche émettrice de lumière peut être un matériau émetteur de lumière organique ou une diode électroluminescente organique pouvant être adressée à l'aide d'un schéma de commande d'adressage multiplex. L'impédance de la couche photoconductrice est réduite lorsqu'elle est heurtée par la lumière émanant de la couche émettrice de lumière. Du fait de l'impédance réduite de la couche photoconductrice, la couche électrophorétique, qui ne peut pas être elle-même multiplexée, est adressée à une tension de sous-seuil inférieure.

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