Patent ID: 8358278

Claim:
An input device of a mobile terminal having a display unit, the input device comprising: a scroll unit installed on a housing of the mobile terminal and configured to scroll through a list of menu items presented on the display unit, wherein the list of menu items correspond to various functions of the mobile terminal; a menu display unit configured to display a first menu item of the list of menu items when the first menu item is selected by the scroll unit from the list of menu items presented on the display unit and to replace the first menu item with a second menu item of the list of menu items when the second menu item is subsequently selected by the scroll unit from the list of menu items presented on the display unit, wherein the menu display unit is implemented on the housing separately from the display unit, and wherein the menu display unit is further configured to display one of the list of menu items when said one of the list of menu items is selected by the scroll unit while the display unit is turned off; and a manipulation unit configured to activate the function of the mobile terminal when pressed.