G - Physics – 09 – F
Patent
G - Physics
09
F
G09F 9/00 (2006.01) G06F 3/147 (2006.01) G06F 17/30 (2006.01) G06Q 30/00 (2006.01) G08C 19/00 (2006.01) G09G 3/20 (2006.01) G09G 5/00 (2006.01) H04J 3/24 (2006.01)
Patent
CA 2208884
An electronic price display system has uniquely addressed electronic shelf labels (ESLs) controlled by a central computer or host. To save power and communications channel bandwidth, subglobal addressing is defined which permits the central computer to address more than one but less than all of the labels. In one application of the addressing protocol the central computer causes the subglobally addressed labels to perform some common action such as changing a display to an alternative display. In another application of the addressing protocol the central computer uses the subglobal addressing to disambiguate when data collisions occur due to more than one label attempting to respond to a global query.
Système d'affichage électronique de prix, comprenant des étiquettes électroniques de rayons (ESL) à adressage unique, commandées par un ordinateur central ou hôte. Afin d'économiser le courant et la largeur de bande de canal de transmission, l'adressage sous-global permet à l'ordinateur central d'adresser plus d'une mais non la totalité des étiquettes. Dans une application du protocole d'adressage, l'ordinateur central commande aux étiquettes adressées sous-globalement une action commune, p. ex. de changer d'affichage. Dans une autre application du protocole d'adressage, l'ordinateur central utilise l'adressage sous-global comme moyen de désambiguïsation en cas de collisions de données dues à une tentative de réponse de plus d'une étiquette à une interrogation globale.
Cassan Maclean
Electronic Retailing Systems International Inc.,
LandOfFree
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