US Patent 10349273 User authentication using gesture input and facial recognition

A mobile device is provided. The mobile device includes a body of a bangle type configured to be worn on a user body, a display mounted in the body, a motion sensor configured to detect a motion, a storage configured to store control information which is differently set according to a motion state, and, when a motion is detected by the motion sensor, a controller configured to change a screen of the display according to control information corresponding to the detected motion. Accordingly, the mobile device is easily carried and used.