US Patent 9197704 Electronic label system and operation method thereof

An electronic label system and an operation method thereof are provided. The electronic label system includes a control unit and a plurality of electronic label units. The control unit is used for sending display information. The electronic label units are coupled to the control unit to receive the display information and display according to the corresponding display information, respectively. The electronic label units respectively output a plurality of state information to the control unit so that the control unit can monitor operation states of the electronic label units according to the state information.