User terminal device and displaying method thereof

1. A user terminal device, comprising:

a single flexible display configured to be divided into a first display area and a second display area by a folding line, wherein an exposure area of the first display area is not covered by the second display area when the user terminal device is folded so that the first display area faces the second display area and a part of the first display area touches a part of the second display area;

a detector configured to detect a user interaction; and

a controller configured to,

in response to detecting a folding of the single flexible display along the folding line, control the single flexible display to display a predetermined user interface (UI) on the exposure area, and

in response to detecting a touching of one icon among a plurality of icons which is displayed on the exposure area while the single flexible display is folded and an unfolding of the single flexible display, control the single flexible display to display a screen corresponding to an application of the touched icon on a full screen of the single flexible display in an unfolded state,

wherein each icon among the plurality of icons corresponds to a different application.

2. The user terminal device as claimed in claim 1 , wherein the controller is configured to, in response to detecting a folding of the single flexible display along the folding line while the user terminal device executes a specific application, control the single flexible display to display a UI for controlling the specific application on the exposure area.

3. The user terminal device as claimed in claim 1 , wherein the controller is configured to, in response to detecting a predetermined user interaction while the single flexible display is folded, control the single flexible display to display a UI for releasing a lock state of the user terminal device on the exposure area.

4. The user terminal device as claimed in claim 1 , wherein the controller is configured to, in response to detecting a predetermined user interaction while the single flexible display is folded, control the single flexible display to display a UI for changing a setting of the user terminal device on the exposure area.

5. The user terminal device as claimed in claim 1 , further comprising:

a communicator configured to send and receive messages,

wherein the controller is configured to, in response to receiving a message while the single flexible display is folded, control the single flexible display to display a UI for informing that the message is received on the exposure area.

6. The user terminal device as claimed in claim 5 , wherein the controller is configured to, in response to detecting an unfolding of the single flexible display up to a predetermined angle while the UI for informing that a message is received is displayed on the exposure area, control the single flexible display to display a message window for responding to the message.

7. The user terminal device as claimed in claim 1 , wherein the controller is configured to, in response to the touched icon being a photo icon, control the single flexible display to display a call screen on an upper area and a list for selecting a photo to be shared.

8. The user terminal device as claimed in claim 1 , wherein the controller is configured to,

in response to receiving a message while a specific application is executed as the single flexible display is in a folded state, control the single flexible display to display a UI for informing that the message is received on the exposure area,

in response to detecting an unfolding of the single flexible display while the UI for informing that the message is received is touched, control the single flexible display to display a message window for responding to the message, and

in response to detecting an unfolding of the single flexible display while the UI for informing that the message is received is not touched, control the single flexible display to display an execution screen of the specific application.

9. The user terminal device as claimed in claim 1 , wherein the controller is configured to,

in response to a UI for releasing a lock state of the user terminal device being displayed on the exposure area as the single flexible display is in a folded state, and detecting an unfolding of the single flexible display after a lock release command is input through the UI for releasing the lock state of the user terminal device, control the single flexible display to display a home screen, and

in response to detecting an unfolding of the single flexible display while the lock release command is not input through the UI for releasing the lock state of the user terminal device, control the single flexible display to display a UI for releasing the lock state of the user terminal device on full screen.

10. The user terminal device as claimed in claim 1 , wherein the controller is configured to,

in response to a telephone call request being received while the single flexible display is folded, control the single flexible display to display a UI for informing that a telephone call request is received on the exposure area,

in response to the single flexible display being unfolded to a first angle range, control the single flexible display to display at least one icon for controlling a function of the telephone call request, and

in response to the single flexible display being unfolded to a second angle range that is more than the first angle range, accept the telephone call request and control the single flexible display to display a telephone call screen.

11. The user terminal device as claimed in claim 1 , wherein the controller is configured to,

in response to a telephone call request being received while a specific application is executed as the single flexible display is in a folded state, control the single flexible display to display a UI for informing that the telephone call request is received on the exposure area,

in response to detecting an unfolding of the single flexible display, accept the telephone call request and controls the single flexible display to display a telephone call screen, and

in response to terminating the telephone call, control the single flexible display to display an execution screen of the specific application.

12. The user terminal device as claimed in claim 1 , wherein the controller is configured to,

in response to detecting a folding of the single flexible display to a first angle while an execution screen of a specific application is displayed on the single flexible display, control the single flexible display to display at least part of an execution screen of the specific application on at least part of the second display area, and

in response to detecting a folding of the single flexible display such that the first display area of the single flexible display comes in contact with the second display area, control the single flexible display to display a brief information providing screen of the specific application on the exposure area.

13. A displaying method of a user terminal device, comprising:

displaying an image on a single flexible display that is divided into a first display area and a second display area by a folding line, wherein an exposure area of the first display area is not covered by the second display area when the user terminal device is folded so that the first display area faces the second display area and a part of the first display area touches a part of the second display area;

in response to a detecting a folding of the single flexible display with reference to the folding line, displaying a predetermined user interface (UI) on the exposure area;

in response to detecting a touching of one icon among a plurality of icons which is displayed on the exposure area while the single flexible display is folded and an unfolding of the single flexible display, displaying a screen corresponding to an application of the touched icon on a full screen of the single flexible display in an unfolded state,

wherein each icon among the plurality of icons corresponds to a different application.

14. The method as claimed in claim 13 , wherein the displaying further comprises, in response to detecting a folding of the single flexible display with reference to a folding line while the user terminal device executes a specific application, displaying a UI for controlling the specific application on the exposure area.

15. The method as claimed in claim 13 , further comprising:

in response to detecting a predetermined user interaction while the single flexible display is folded, displaying a UI for releasing a lock state of the user terminal device on the exposure area.

16. The method as claimed in claim 13 , further comprising:

in response to detecting a predetermined user interaction while the single flexible display is folded, displaying a UI for changing a setting of the user terminal device on the exposure area.

17. The method as claimed in claim 13 , further comprising:

in response to receiving a message while the single flexible display is folded, displaying a UI for informing that the message is received on the exposure area.

18. The method as claimed in claim 17 , further comprising:

in response to the UI for informing that the message is received being displayed on the exposure area while the single flexible display is folded, and detecting an unfolding of the single flexible display up to a predetermined angle while the UI for informing that the message is received is displayed on the exposure area, displaying a message window for responding to the message.