Flexible display device and method of controlling same

A method of controlling a flexible display device, the method comprising:

• detecting at least two rolling characteristics in response to a display of the flexible display device being rolled, the at least two rolling characteristics comprising a rolling diameter and a rolling area of the display;
• and
• performing a first function of the flexible display device and displaying a first user interface (UI) corresponding to the first function on the display in response to the display being entirely and first multiple times rolled into a cylindrical shape to have a first rolling diameter smaller than a first threshold value, and performing a second function of the flexible display device and displaying a second UI corresponding to the second function on the display in response to the display being entirely and second multiple times rolled into the cylindrical shape to have a second rolling diameter smaller than a second threshold value,
• wherein the first rolling diameter depending on the first multiple times rolled display is different from the second rolling diameter depending on the second multiple times rolled display,
• wherein the first UI is different from the second UI,
• and
• wherein the method further comprises, in response to rolling the entire area of the display, changing a first screen mode of the display to a second screen mode of the display.

A flexible display device comprising:

• a display;
• a sensor configured to detect at least two rolling characteristics comprising a rolling area of the display and one of a twisting characteristic, a bending characteristic, and a folding characteristic when the display is one of rolled, twisted, bent, and folded;
• and
• a controller configured to, in response to the display being entirely and first multiple times rolled into a cylindrical shape to have a first rolling diameter smaller than a first threshold value, perform a first function of the flexible display device and display a first user interface (UI) corresponding to the first function on the display, and in response to the display being entirely and second multiple times rolled into the cylindrical shape to have a second rolling diameter smaller than a second threshold value, perform a second function of the flexible display device and display a second UI corresponding to the second function on the display,
• wherein the first rolling diameter depending on the first multiple times rolled display is different from the second rolling diameter depending on the second multiple times rolled display,
• wherein the first UI is different from the second UI, and
• wherein the controller is further configured to, in response to rolling the entire area of the display, change a first screen mode of the display to a second screen mode of the display.

A system, the system comprising a flexible display device and a support unit, the flexible display device comprising:

• a display;
• a sensor configured to detect at least two rolling characteristics in response to the display being rolled, the at least two rolling characteristic characteristics comprising a rolling diameter and a rolling area of the display;
• and
• a controller configured to, in response to the display being entirely and first multiple times rolled into a cylindrical shape to have a first rolling diameter smaller than a first threshold value, perform a first function of the flexible display device and display a first user interface (UI) corresponding to the first function on the display, and in response to the display being entirely and second multiple times rolled into the cylindrical shape to have a second rolling diameter smaller than a second threshold value, perform a second function of the flexible display device and display a second UI corresponding to the second function on the display,
• wherein the first rolling diameter depending on the first multiple times rolled display is different from the second rolling diameter depending on the second multiple times rolled display,
• wherein the first UI is different from the second UI,
• wherein the first function is performed when the display is rolled and inserted into the support unit, and
• wherein the controller is further configured to, in response to rolling the entire area of the display, change a first screen mode of the display to a second screen mode of the display.