Laundry treating apparatus

A laundry treatment apparatus comprising:

• a cabinet;
• a laundry receiving space defined in the cabinet and providing a predetermined space for accommodating laundry;
• a laundry introduction opening included in a front surface of the cabinet and formed in communication with the laundry receiving space;
• a supply unit configured to supply at least one of air and vapors to the laundry receiving space;
• a laundry support unit provided in the cabinet and configured to have a hanger hung thereon;
• a door configured to open and close the laundry introduction opening, the door including a door body rotatably coupled to the cabinet and a body through hole penetrating the door body;
• a window provided in the body through hole in the door body of the door and made of a transparent material;
• a knock sensing unit configured to sense a sound or vibration generated by a knock on the window or the door body;
• a lamp configured to emit light in the laundry receiving space when the knock sensing unit senses the sound or vibration generated by the knock;
• and
• a state sensing unit configured to determine a state of the laundry receiving space,
• wherein when the laundry introduction opening is closed by the door and when the knock sensing unit senses the sound or vibration, the lamp emits different light based on the state determined by the state sensing unit.