| 摘要 |
A joystick, positioned close to a display of the mobile telephone, is used to navigate through menus on the display (e.g. up and down levels of the menu and up and down lists of functions at the same level) and also to select and/or initiate functions. A user can use the joystick whilst continuously watching the screen, making navigation far easier. Further, the user merely has to nudge the joystick in the required direction (typically "right" to navigate deeper through a menu structure, e.g. from the top level to the first level or to select a function; "left" to navigate up through the levels; "up" to navigate up a list of options at a given level; "down" to navigate down a list of options at a given level).
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