US Patent 7603143 Mobile telecommunication handset having touch pad

A mobile telecommunication handset including a display unit configured to display information, a touch pad configured to generate input when being touched, and a control unit configured to control the display unit and the touch pad and to perform a function corresponding to the generated input from the touch pad being touched. Further, the control unit activates or deactivates the touch pad based on at least one from a state of the mobile handset or an input external from the touch pad.