Display device for a portable data carrier

Details Display device for a portable data carrier Display device for a portable data carrier

G - Physics

06

K

G06K 19/07 (2006.01) G06K 19/077 (2006.01)

Patent

CA 2416044

The invention relates to a portable data carrier having a display device. This data carrier contains a microprocessor and storage devices associated with the microprocessor as well as means for displaying data stored in the storage devices associated with the microprocessor. In addition, the data carrier contains a display controller for controlling the display means and an energy supply unit for supplying at least the display unit and its controller with energy. Such a data carrier is to be improved so as to reduce the energy demand for the display unit. This is obtained by a nonvolatile memory disposed separately from the microprocessor and its storage device, said memory being associated with the controller of the display means and containing the data intended for display.

L'invention concerne un support de données portable comportant un dispositif d'affichage. Ledit support de données comporte un microprocesseur, des unités mémoire affectées au microprocesseur, ainsi que des moyens d'affichage de données stockées dans les unités mémoire affectées au microprocesseur. Ledit support de données comporte par ailleurs une unité de commande d'affichage destinée à commander les moyens d'affichage, ainsi qu'une unité d'alimentation alimentant au moins l'unité d'affichage et l'unité de commande associée en énergie. L'invention vise à réduire la consommation d'énergie de l'unité d'affichage sur un tel support de données. A cet effet, le support de données selon l'invention comporte une mémoire non volatile séparée du microprocesseur et de l'unité mémoire associée à celui-ci, ladite mémoire étant affectée à l'unité de commande des moyens d'affichage et contenant les données destinées à l'affichage.

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