Human body sensing device

A human body sensing device comprising:

• a contact sensing unit including a sensing electrode and a signal electrode;
• a first activation module configured to sense a contact with a body through the sensing electrode when the sensing electrode and the signal electrode contact the body, and to output a first wake-up signal in response to the sensing of the contact;
• a first motion sensing unit configured to sense a first motion of the body;
• a second activation module configured to output a second wake-up signal, based on the sensed first motion;
• and
• a human body communication unit configured to receive the first wake-up signal in a first state, to switch to a second state based on the received first wake-up signal, to receive the second wake-up signal in the second state, and to output a data signal, and
• wherein the signal electrode outputs a ground voltage in the first state, and outputs the data signal to the body in the second state.