Wireless communication terminal for changing image files of background picture and method for displaying image files of background picture using the same

A portable communication terminal comprising:

• a mode setting unit for setting a background picture display mode of an idle screen, wherein said background picture display mode includes a fixed display mode for displaying at least one of a plurality of image files as a background picture on the idle screen and a random display mode for randomly selecting and displaying one of the plurality of image files whenever one or more predetermined conditions for the random display mode are satisfied, wherein the mode setting unit sets the background picture display mode to one of the fixed display mode and the random display mode in response to an input signal;
• a storage unit for storing the background picture display mode set by said mode setting unit, the plurality of image files, and the predetermined conditions, wherein one of the predetermined conditions include displaying one of the plurality of image files selected according to the random display mode on the screen after operation of a component of the portable communication terminal, the component being one of a cover and a folder mounted to a body of the portable communication terminal;
• a sensor for sensing whether the component is opened;
• a control unit for determining whether the random display mode is set when the sensor senses that the component is opened, and selecting randomly one of the plurality of image files when the random display mode is set;
• and
• a display unit for displaying the image file selected by said control unit as the background picture of the idle screen under control of said control unit.