PURPOSE: Display device and control method thereof are provided to improve the user convenience. CONSTITUTION: An image processing unit processes an image signal (S512). A display unit displays the processed image signal as an image (S514). A user input unit includes a direction key and receives user input (S504). A control unit controls the display unit to display a user interface including a number keypad when receiving a predetermined user input from the user input unit and receives user selection selecting a channel number in the number keypad displayed according to the user input (S510). [Reference numerals] (AA) Start; (BB) End; (S502) Display device operates in a TV mode; (S504) Has a previously-set user input been received ?; (S506) Display device switches into a channel selection mode; (S508) Display device displays a user interface including a number key pad; (S510) Display device recognizes the user's input on a direction key as a direction-moving command and selects a channel number on the number key pad; (S512) Display device receives the image signals of the channel corresponding to a selected channel number and processes them; (S514) Display device displays images corresponding to the processed image signals; (S516) Display device performs a previously-set action for a certain direction key
