| 摘要 |
The present invention relates to an electro shelf label, a method for providing information thereof, and a system having the same. The method for providing information of the present invention comprises the following steps: turning off a wireless communications unit when an active mode is switched into a sleep mode; and turning on the wireless communications unit when pre-registered identification data is received through a near field communications unit in the sleep mode. According to the present invention, the electro shelf label can detect a change in information in the sleep mode. |
