Display device having display screen and method for controlling curvature of the display screen

A display device, comprising:

• a user interface configured to receive a curvature change signal;
• a memory configured to map curvature change information included in the received curvature change signal to Graphical User Interface (GUI) change data corresponding to the curvature change information and store the mapped result;
• a controller configured to control operations of the display;
• and
• a display configured to output at least one GUI on a display screen based upon a command of the controller,
• wherein, when the user interface receives a curvature change signal of the display screen outputting a first GUI, the controller is further configured to:
• change a curvature of the display screen based upon the received signal,
• extract GUI change data corresponding to the changed curvature of the display screen,
• generate a second GUI by modifying a shape of the first GUI based upon the extracted GUI change data, wherein the controller, when generating the second GUI, is further configured to:
• divide the first GUI into a plurality of regions,
• modify the regions based on the GUI change data to form modified regions, and
• move a graphical object from a first one of the modified regions to a second one of the modified regions, a curve effect in the modified first region being larger than a curve effect in the modified second region,
• output the generated second GUI having a curvature corresponding to the changed curvature of the display screen on the display screen,
• output, on the display screen, an indicator identifying a degree to which the curvature deviates from a straight line, and
• set each of a plurality of speakers associated with the display device to have an output direction corresponding to the changed curvature of the display screen when the generated second GUI is outputted on the display screen, and
• wherein the changed curvature of the display screen is calculated based on a change of a length in a second direction corresponding to a unit length of a first direction of the display screen.