Smart door lock system having door-lock area information display function and control method of smart door lock system

A smart door lock system having a door-lock area information display function, the smart door lock system comprising:

• a smart door lock part comprising a door lock installed on a door of a smart lock application part having a door lock area to lock and unlock the door, and an e-paper part that is a display means, the smart door lock part being configured to display door-lock area information on the e-paper part after receiving, storing, and setting door-lock use setting information comprising the door-lock area information, compare a door-lock unlock code with a preset door-lock lock/unlock code upon reception of a door lock signal comprising the door-lock unlock code, and lock or unlock the door lock upon match;
• and
• a door-lock management part configured to store door-lock identification information of the smart door lock part for at least one or more door lock areas, manage the door lock area, provide digital key information on a digital key to a user who requested to use the door lock area when use of the door lock area is requested for any door lock area, generate the door-lock area information, and then transmit the door-lock use setting information comprising the door-lock area information to the smart door lock part,
• wherein the smart door lock part comprises:
• a lock terminal storage configured to store the door-lock lock/unlock code and the door-lock use setting information comprising the door-lock area information;
• a short-range wireless communication part configured to receive and output the door-lock lock/unlock code and the door-lock use setting information;
• the door lock;
• an input and output part comprising the e-paper part;
• and
• a lock terminal controller configured to display the door-lock area information on the e-paper part after receiving the door-lock use setting information comprising the door-lock area information to store and set the door-lock use setting information in the lock terminal storage, compare the door-lock unlock code with the preset door-lock lock/unlock code upon reception of the door lock signal comprising the door-lock unlock code, and control the door lock upon match to lock or unlock the door lock,
• wherein the smart door lock system further comprises a lock terminal input part installed in the door lock area and configured to receive and display the door-lock area information set from the smart door lock part, comprise a state change button so as to transmit area-state information change information requesting a change of the door-lock area information when the state change button is pressed, and receive and display the changed door-lock area information accordingly, and
• wherein the lock terminal controller receives the area-state information change information through the short-range wireless communication part, sequentially changes at least two or more pieces of the door-lock area information, displays the door-lock area information on the e-paper part, and transmits the changed door-lock area information to the lock terminal input part.