Electronic price indicator, power supply apparatus and electric price indicating system

摘要

An electronic price indicating system according to the embodiment includes: at least one electronic price indicator for displaying product information; and a power supply apparatus connected to the at least one electronic price indicator to supply a driving signal which is driving power of the at least one electronic price indicator. The power supply apparatus includes: a power supply unit connected to the at least one electronic price indicator and supplying driving power to the electronic price indicator; an antenna for receiving data transmitted from a server; and a communication unit for confirming a first electronic price indicator to which data received via the antenna is to be applied and supplying power to the confirmed first electronic price indicator, wherein the communication unit controls an operation of the power supply unit, modulates the power supply signal according to the received data, and supplies the modulated power supply signal to the first electronic price indicator.