Patent ID: 8185163

Claim:
A method of controlling a mobile communication device having a screen, a first input key which can be manipulated in at least two directions and a second input key which can be manipulated in at least two directions, the method comprising: generating a first signal upon manipulation of the first input key; generating a second signal upon manipulation of the second input key; generating a third signal upon pressing down on the first input key; and controlling a predetermined operation of the mobile communication device in response to the first, second and third signals, wherein the step of controlling includes moving a pointing cursor displayed on the screen in response to the first signal, scrolling the screen in response to the second signal, and selecting an object being pointed at by the pointing cursor or switching an operation mode of the second input key upon the generation of the third signal, wherein the first input key is one of a joystick key, a touch pad, a track ball, and a pointing stick, displaying an image file corresponding to a thumbnail image being pointed at by the pointing cursor upon pressing down on the first input key; and displaying at least one of an image file previous to an image file currently being displayed on the screen or an image file subsequent to the image file currently being displayed on the screen upon receipt of the second signal.