Patent ID: 8464160

Claim:
A user interface device which provides a user with a work space which serves as an interface through which the user controls an application program, said user interface device comprising: a display unit configured to display a first work space and a second work space, the first work space being assigned to the user, and the second work space being different from the first workspace; a detection unit configured to detect a position of the user; a calculation unit configured to calculate an appropriate distance between the user and the second work space, according to a type of the application program controlled by the user through the first work space; and a notification unit configured to notify the user that a distance between the position of the user detected by said detection unit and the second work space is shorter than the appropriate distance calculated by said calculation unit, wherein said calculation unit is further configured to calculate the appropriate distance according to a physical characteristic of the user so that the appropriate distance is longer when a hand of the user closer to the second work space is a dominant hand of the user than when a hand of the user farther from the second work space is a dominant hand of the user.