Patent ID: 8258921

Claim:
An electronic shelf label system comprising: a plurality of electronic shelf labels arranged in corresponding relation to products, and displaying product data relating to corresponding products; and an information distribution part for making communication with said plurality of electronic shelf labels to distribute said product data to each of said plurality of electronic shelf labels on which said product data should be displayed, each of said plurality of electronic shelf labels including: a battery for supplying power of this electronic shelf label; a to-be-charged part to be charged by power supplied from said battery; a transmission part for sending data to said information distribution part by using power accumulated in said to-be-charged part; and a charge control part for controlling power supplied from said battery to said to-be-charged part, in each of said plurality of electronic shelf labels, on receipt of certain data from said information distribution part, a charge operation mode of the respective electronic shelf label being changed is selected from one of two predetermined modes based on said certain data a first mode in which said to-be-charged part is charged in a first period of time and a second mode in which said to-be-charged part is charged in a second period of time longer than said first period of time, power supplied from said battery to said to-be-charged part being lower in said second mode than in said first mode.