Terminal case, mobile terminal, and mobile terminal assembly including the terminal case and the mobile terminal

A mobile terminal assembly comprising:

• a terminal case having a incision part;
• and
• a mobile terminal detachable from the terminal case;
• a lens cover configured to open and close the incision part,
• wherein the mobile terminal comprises:
• a display unit;
• a camera module disposed at a position corresponding to the incision part;
• a lens cover sensing unit configured to sense whether the lens cover is opened or closed;
• and
• a control unit configured to execute a camera application on the basis of whether the lens cover is opened or closed, wherein the control unit is configured to:
• execute the camera application when the lens cover is opened in a state where the display unit is turned on, and
• to terminate the camera application and display, through the display unit, a user interface displayed before the camera application is executed, when the opened lens cover is closed in a state where the camera application is being executed.