User terminal and sleep management method

A user terminal comprising:

• a communicator configured to communicate with a sleep data acquisition apparatus and at least one home appliance;
• a display configured to display a graphic user interface comprising a sleep environment setting screen for setting a sleep environment setting for controlling operation of the at least one home appliance, wherein the sleep environment setting includes an air volume setting for a sleep induction stage for inducing a sleep of a user, a first air volume setting for a sleep maintenance stage for maintaining the sleep of the user, and a second air volume setting for a sleep stop stage for stopping the sleep of the user;
• a controller configured to:
• receive and store the sleep environment setting from the user through the graphic user interface,
• receive sleep data from the sleep data acquisition apparatus through the communicator, wherein the sleep data includes signals corresponding to a heart rate, respiration rate, and movement of the user detected by a piezoelectric sensor,
• obtain a sleep state or an awake state of the user based on the sleep data,
• obtain a bed occupancy status of the user based on the sleep data,
• transmit a control signal based on the sleep state or the awake state of the user and the bed occupancy status of the user to the at least one home appliance through the communicator,
• control, in response to the user being in the sleep state, the at least one home appliance according to the sleep environment setting, and
• control, in response to the user being in the awake state before a predetermined wake-up time, the at least one home appliance according to an awake state setting, wherein to determine the awake state, the controller is configured to determine whether the awake state has been maintained by the user for at least a predetermined time duration, and confirm the user as being in the awake state when the awake state has been maintained by the user for at least the predetermined time duration.