Patent Publication Number: US-9841869-B2

Title: Method for providing GUI using motion and display apparatus applying the same

Description:
This is a continuation application of U.S. patent application Ser. No. 12/900,182, filed on Oct. 7, 2010, in the U.S. Patent and Trademark Office, which application claims priority under 35 U.S.C. §119(a) to Korean Patent Application No. 10-2009-0095189, filed on Oct. 7, 2009, in the Korean Intellectual Property Office, the contents of which are incorporated herein by reference in their entireties. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates generally to a method for providing a Graphic User Interface (GUI) and a display apparatus applying the same, and more particularly, to a method for providing a GUI which displays a menu according to a detected motion and a display apparatus applying the same. 
     2. Description of the Related Art 
     Due to a continued advancement of mobile technologies, many more mobile devices with displays are available for use. In addition, display apparatuses are now capable of providing a variety of functions. For example, a complex multimedia device integrating therein functions of a Motion Pictures Experts Group (MPEG) Layer Audio 3 (MP3) player, camera and mobile phone are in high demand. 
     GUI technology has also been developed to keep pace with the diversification of display apparatuses, and to enable simple use of the provided functions. Sensors are particularly developed to receive various user manipulations and to enable the users to input instructions in a preferred manner, such as by touching a screen or by motion sense. 
     As such, GUIs provide graphics on a screen and are rapidly replacing the conventional button-based User Interfaces (UIs). Accordingly, there is a need for a method to provide a GUI, with which users can easily use a menu on the functions of the display apparatuses. 
     SUMMARY OF THE INVENTION 
     The present invention has been made to address at least the above problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the present invention provides a method for providing a GUI which displays a screen of a specific face on a three dimensional (3D) GUI, and if a user&#39;s manipulation is inputted when the screen of the specific face is displayed, displays the screen of at least one of the adjoining faces corresponding to the direction of the user&#39;s manipulation, and a display apparatus applying the same. 
     According to the present invention, a method for providing a GUI of a display apparatus includes generating a 3D GUI constructed to display separate screens on a specific face and at least one adjoining faces contacting an edge of the specific face, displaying the screen of the specific face, and if a user manipulation is inputted in a state that the screen of the specific face is displayed, displaying the screen of the at least one adjoining face that corresponds to a direction of the user&#39;s manipulation. 
     The user&#39;s manipulation includes a slanting motion by which the display apparatus is slanted in a specific direction, and displaying the screen of at least one face includes displaying the screen of at least one of the upward, downward, leftward and rightward faces that corresponds to the direction of the slanting, according to a direction of the manipulation by the slanting motion. 
     The displaying the screen of the at least one face comprises displaying the 3D GUI at an inclination in the direction of the slanting, to display the screen of at least one of the upward, downward, leftward and rightward faces that corresponds to the direction of the slanting. 
     The displaying the screen of the at least one face includes inputting a start manipulation, indicating an initiation of a manipulation by slanting motion, detecting for the slanting motion of the display apparatus, and displaying a screen of at least one of the upward, downward, leftward and rightward faces that corresponds to the direction of the slanting, according to the direction of slanting motion as detected. 
     The displaying the screen of the at least one face includes displaying a screen of one of the upward, downward, leftward and rightward faces that corresponds to the direction of the slanting, if a manipulation by the slanting motion is inputted in one of upward, downward, leftward and rightward directions with reference to a screen of the display apparatus. 
     The displaying the screen on the at least one face includes displaying screens of two of the upward, downward, leftward and rightward faces that correspond to the direction of the slanting, if a manipulation by the slanting motion is inputted in one of diagonal directions including left-upward, left-downward, left-downward and right-downward directions with reference to a screen of the display apparatus. 
     According to the present invention, a display apparatus includes a GUI generating unit which generates a 3D GUI constructed to display separate screens on a specific face and at least one adjoining faces contacting an edge of the specific face, a display unit which displays the 3D GUI, and a control unit which controls so that, if a user manipulation is inputted in a state that the screen of the specific face is displayed, the screen of the at least one adjoining face that corresponds to a direction of the user&#39;s manipulation is displayed. 
     The specific face is one face of a rectangular parallelepiped, and the at least one adjoining face is an upward face, a downward face, a leftward face, and a rightward face which adjoin four edges of the specific face. 
     The display apparatus additionally includes a motion detecting unit which detects a motion of the display apparatus, and the user&#39;s manipulation includes a slanting motion by which the display apparatus is slanted in a specific direction, and the control unit controls so that the screen of at least one of the upward, downward, leftward and rightward faces that corresponds to the direction of the slanting is displayed, according to a direction of the manipulation by the slanting motion. 
     The control unit controls so that, if a start manipulation is inputted, indicating an initiation of a manipulation by slanting motion, according to the direction of the slanting motion as detected by the motion detecting unit, a screen of at least one of the upward, downward, leftward and rightward faces that corresponds to the direction of the slanting is displayed. 
     The control controls so that, a screen of one of the upward, downward, leftward and rightward faces that corresponds to the direction of the slanting is displayed, if a manipulation by the slanting motion is inputted in one of upward, downward, leftward and rightward directions with reference to a screen of the display apparatus. 
     The control unit controls so that the screens of two of the upward, downward, leftward and rightward faces that correspond to the direction of the slanting, are displayed, if a manipulation by the slanting motion is inputted in one of diagonal directions including left-upward, left-downward, left-downward and right-downward directions with reference to a screen of the display apparatus. 
     The separate screens of the specific face and the at least one adjoining face contacting an edge of the specific face, include at least one of a menu screen, a content playback screen, and an application executing screen. 
     According to an embodiment of the present invention, a method for providing a GUI of a display apparatus which is capable of detecting a motion, includes inputting a manipulation by slanting motion with respect to the display apparatus, and displaying a menu on at least one of upward, downward, leftward and rightward sides of a screen that corresponds to a direction of the manipulation by slanting motion, if the manipulation by slanting motion is inputted. 
     According to the present invention, a screen on a specific face is displayed on a 3D GUI, and if a user&#39;s manipulation is inputted in a state that the screen of the specific face is displayed, a screen of at least one of adjoining face that corresponds to a direction of the user&#39;s manipulation, is displayed. As a result, user is able to select a desired menu with increased ease and convenience. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features and advantages of the present invention will be more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  illustrates a mobile phone according to an embodiment of the present invention; 
         FIG. 2  is a flowchart of a method for providing a 3D GUI according to an embodiment of the present invention; 
         FIGS. 3A to 3C  illustrate the process of displaying a menu on the leftward face according to an embodiment of the present invention; 
         FIG. 4  illustrates the structure of a 3D GUI according to an embodiment of the present invention; 
         FIG. 5  illustrates a mobile phone having a motion start button according to an embodiment of the present invention; 
         FIGS. 6A to 6C  illustrate instances when the menu on the leftward face is displayed, and instances when the menus on the leftward and upward faces are displayed, according to an embodiment of the present invention; 
         FIGS. 7A to 7D  illustrate the process of selecting a subordinate menu using the 3D GUI menu according to an embodiment of the present invention; 
         FIGS. 8A to 8D  illustrate the process in which the user selects an item displayed on the specific face according to an embodiment of the present invention; 
         FIGS. 9A to 9D  illustrate the process of selecting an item of a menu displayed on the leftward face according to an embodiment of the present invention; 
         FIGS. 10A to 10D  illustrate the process of bookmarking on a menu displayed on the rightward face, according to an embodiment of the present invention; 
         FIGS. 11 a    to  11 D illustrate the process of displaying the widget on the specific face using the menu displayed on the leftward face, according to an embodiment of the present invention; 
         FIGS. 12A to 12D  illustrate the process of moving the widget from the specific face to the item of the menu displayed on the leftward face, according to an embodiment of the present invention; 
         FIGS. 13A to 13D  illustrate the process of displaying icons on the specific face in accordance with a direction viewed by the user, according to an embodiment of the present invention; 
         FIG. 14  is a flowchart illustrating the process of displaying a menu on a corresponding side of a two dimensional (2D) GUI environment, if a manipulation by slanting motion is inputted to the mobile phone, according to an embodiment of the present invention; 
         FIGS. 15A to 15C  illustrate the process of displaying a menu on a corresponding side of a 2D GUI environment, if a manipulation by slanting motion is inputted to the mobile phone, according to an embodiment of the present invention; 
         FIGS. 16A and 16B  illustrate the structure of a 3D GUI which displays an application execution screen and an application list according to an embodiment of the present invention; 
         FIGS. 17A to 17C  illustrate the process of using the 3D GUI on which application is displayed; and 
         FIGS. 18A and 18B  illustrate the process in which the mobile phone adjusts the direction in which the 3D GUI is displayed, according to the direction viewed by the user. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS OF THE PRESENT INVENTION 
     Embodiments of the present invention are described in detail with reference to the accompanying drawings. In the following description, the same or similar reference numerals may be used for the same or similar elements when they are illustrated in different drawings. Detailed descriptions of constructions or processes known in the art may be omitted for the sake of clarity and conciseness. 
       FIG. 1  illustrates a mobile phone  100  according to an embodiment of the present invention. Referring to  FIG. 1 , the mobile phone  100  includes a communication unit  110 , an audio input unit  120 , an audio output unit  130 , a motion detecting unit  140 , a GUI generating unit  150 , a touch detecting unit  160 , a storage unit  170 , a display unit  180 , and a control unit  190 . 
     The communication unit  110  is connected to access an external device, such as the TV  100  (or mobile phone) via a mobile communication network, a wireless communication network, or the Internet. The mobile communication network herein may include the Global System for Mobile Communications (GSM) network, or Wideband Code Division Multiple Access (WCDMA) network. The wireless communication network is connected, for example, by Bluetooth® or Zigbee®. The Internet is connected, for example, over the wireless Local Area Network (LAN). 
     The audio input unit  120  receives user voice input and converts the user&#39;s voice into audio data consisting of electric signals, and transmits the converted audio data to the control unit  190 . 
     The audio output unit  130  outputs the audio signal received from the control unit  190  through a speaker or the like. 
     The motion detecting unit  140  detects movements of the mobile phone  100 , such as a manipulation by slanting motion of the mobile phone  10 . The ‘slanting motion’ herein refers to a slanting of the mobile phone  100  with reference to a predetermined plane. The motion detecting unit  140  detects the angle and the direction of slanting as the information on the manipulation by slanting motion. The angle of slanting herein refers to the angle between a predetermined face and the mobile phone  100 . The direction of slanting herein refers to a direction to which the mobile phone  100  is slanted. Specifically, the direction of slanting may include one of upward, downward, leftward, rightward, left-up, left-down, right-up and right-down directions. 
     The motion detecting unit  140  may be implemented as an acceleration sensor or a gyro sensor. The motion detecting unit  140  transmits the information regarding the detected manipulation by slanting motion to the control unit  190 . 
     The GUI generating unit  150  generates GUI to receive a user command. The GUI generating unit  150  generates a 3D GUI to display menus on a specific face and at least one face adjoining the edge of the specific face, respectively. That is, the GUI generating unit  150  generates 3D GUI based on five faces of a rectangular parallelepiped. 
     The 3D GUI herein displays menus on upward, downward, leftward and rightward faces each adjoining a specific face and edge adjoining the four edges of the specific face of the rectangular parallelepiped. The specific face is a bottom face of the rectangular parallelepiped, which has the same size as that of the screen of the mobile phone  100 . Additionally, the specific face corresponds to an area on which the GUI menu is displayed. The upward, downward, leftward and rightward faces may display upper or lower menus of the menu displayed on the specific face, and also display icons which work as the shortcuts to the functions provided by the mobile phone  100 . 
     As explained above, the GUI generating unit  150  generates the 3D GUI on which menus are displayed on a specific face and the adjoining faces, and transmits the generated GUI to the control unit  190 . 
     The touch detecting unit  160  detects information on user&#39;s manipulation by touch. Specifically, the touch detecting unit  160  may be implemented as a touch screen to detect the user&#39;s manipulation by touch with respect to the display screen. The touch detecting unit  160  transmits the detected information regarding the user&#39;s manipulation by touch to the control unit  190 . 
     The storage unit  170  stores therein programs to execute respective functions of the mobile phone  100 . The storage unit  170  may be implemented, for example, as a hard disk or non-volatile memory. 
     The display unit  180  displays an image to provide the functions of the mobile phone  100 , and displays GUI for manipulation of the user on the screen. Specifically, the display unit  180  displays the 3D GUI, in which the menus are displayed on the specific face and adjoining faces, according to the user&#39;s manipulation. 
     The control unit  190  controls the overall operation of the mobile phone  100 . The control unit  190  controls in response to the user&#39;s manipulation inputted when the menu on the specific face is displayed, so that the menu on at least one side surface that corresponds to the direction of the user&#39;s manipulation is displayed on the screen. That is, if the user&#39;s manipulation is inputted when the menu on the specific face is displayed, the control unit  190  controls so that the menu on at least one face that corresponds to the direction of the user&#39;s manipulation is displayed on the screen. 
     If the user&#39;s manipulation corresponds to the manipulation by slanting motion of the mobile phone  100 , the control unit  190  controls so that the menu on at least one of the upward, downward, leftward and rightward faces that corresponds to the direction of slanting, is displayed. The control unit  190  controls so that the 3D GUI is slanted in the direction of slanting to thereby display the menu on at least one of the upward, downward, leftward and rightward faces that corresponds to the direction of slanting. 
     The angle of slanting by the 3D GUI is in proportion to the angle of slanting by the mobile phone  100 . Accordingly, the control unit  190  provides the user with an effect as if the 3D GUI is physically slanted. 
     If a start manipulation to initiate the manipulation by slanting is inputted, the control unit  190  may control so that the menu on at least one of the upward, downward, leftward and rightward faces that corresponds to the direction of slanting is displayed according to the direction of slanting. The ‘start manipulation’ is the reference of the manipulation by slanting. That is, the face of the mobile phone  100  at the time of input of the start manipulation becomes the reference plane (i.e., 0 degree) of the manipulation by slanting. The start manipulation may include pressing on a specific button on the mobile phone  100 , or touching of a specific icon. 
     If a manipulation by slanting is inputted to one of upward, downward, leftward or rightward directions with respect to the screen of the mobile phone  100 , the control unit  190  controls so that the menu on one of the upward, downward, leftward and rightward faces that corresponds to the direction of slanting is displayed. Specifically, if a manipulation by slanting is inputted in the upward direction with respect to the screen, the control unit  190  controls so that the menu on the upward face is displayed. If a manipulation by slanting is inputted in the downward direction with respect to the screen, the control unit  190  controls so that the menu on the downward face is displayed. If a manipulation by slanting is inputted in the leftward direction with respect to the screen, the control unit  190  controls so that the menu on the leftward face is displayed. If a manipulation by slanting is inputted in the rightward direction with respect to the screen, the control unit  190  controls so that the menu on the rightward face is displayed. 
     Furthermore, if the manipulation by slanting is inputted in one of left-upward, left-downward, right-upward, and right-downward directions which are diagonal with respect to the screen of the mobile phone  100 , the control unit  190  controls so that the menus on two faces that correspond to the direction of slanting are controlled. Specifically, if the manipulation by slanting is inputted in the left-upward direction with respect to the screen, the control unit controls so that the menus on the leftward and upward faces are displayed. If the manipulation by slanting is inputted in the left-downward direction with respect to the screen, the control unit controls so that the menus on the leftward and downward faces are displayed. If the manipulation by slanting is inputted in the right-upward direction with respect to the screen, the control unit controls so that the menus on the leftward and upward faces are displayed. If the manipulation by slanting is inputted in the right-downward direction with respect to the screen, the control unit controls so that the menus on the rightward and downward faces are displayed. 
     As explained above, the mobile phone  100  displays the 3D GUI with menus on the specific face and the adjoining faces, and controls the 3D GUI according to the manipulation by slanting. Accordingly, the user is able to see new menus by simply slanting the mobile phone  100 , and use otherwise complicated menus with increased ease. 
       FIG. 2  is a flowchart of a method for providing a 3D GUI according to an embodiment of the present invention. 
     At S 210 , the mobile phone  100  generates a 3D GUI with menus displayed on a specific face and at least one face adjoining the specific face. Specifically, the mobile phone  100  generates the 3D GUI established based on five faces of a rectangular parallelepiped. The 3D GUI includes the menus displayed on the specific face and upward, downward, leftward and rightward faces that adjoin the four edges of the specific face, which may be the bottom face of the parallelepiped having the same size as that of the mobile phone screen. The specific face may be the area to display the general GUI menu. Compared to the specific face, the upward, downward, leftward, and rightward faces may display upper or lower menus with respect to the menus on the specific face, or display icons of the shortcuts to the functions provided by the mobile phone  100 . 
     At S 220 , the mobile phone  100  displays the menu on the specific face on the screen. At S 230 -Y, if a user inputs a manipulation by slanting in a state that the menu on the specific face is displayed, at S 240 , the mobile phone  100  displays the menu on at least one face that corresponds to the direction of the manipulation by slanting. In order to display the menu on at least one of the upward, downward, leftward and rightward directions that corresponds to the direction of slanting, the 3D GUI is slanted to the direction of slanting. 
     The angle of slanting by the 3D GUI is in proportion to the angle of slanting by the mobile phone  100 . Accordingly, the control unit  190  provides an effect as if the 3D GUI is physically slanted. 
     Furthermore, if a start manipulation is inputted to initiate the manipulation by slanting, the mobile phone  100  starts detecting for the slanting motion and may display the menu on at least one of the upward, downward, leftward and rightward faces that corresponds to the direction of slanting. The start manipulation is the reference of manipulation. That is, the face of the mobile phone  100  at the time of input of the start manipulation becomes the reference plane (i.e., 0 degree) of the manipulation by slanting. The start manipulation may include pressing on a specific button on the mobile phone  100 , or touching of a specific icon. 
     If a manipulation by slanting is inputted to one of upward, downward, leftward or rightward directions with respect to the screen of the mobile phone  100 , the control unit  190  controls so that the menu on one of the upward, downward, leftward and rightward faces that corresponds to the direction of slanting is displayed. Specifically, if a manipulation by slanting is inputted in the upward direction with respect to the screen, the control unit  190  controls so that the menu on the upward face is displayed. If a manipulation by slanting is inputted in the downward direction with respect to the screen, the control unit  190  controls so that the menu on the downward face is displayed. If a manipulation by slanting is inputted in the leftward direction with respect to the screen, the control unit  190  controls so that the menu on the leftward face is displayed. If a manipulation by slanting is inputted in the rightward direction with respect to the screen, the control unit  190  controls so that the menu on the rightward face is displayed. 
     Furthermore, if the manipulation by slanting is inputted in one of left-upward, left-downward, right-upward, and right-downward directions which are diagonal with respect to the screen of the mobile phone  100 , the control unit  190  controls so that the menus on two faces that correspond to the direction of slanting are controlled. Specifically, if the manipulation by slanting is inputted in the left-upward direction with respect to the screen, the control unit controls so that the menus on the leftward and upward faces are displayed. If the manipulation by slanting is inputted in the left-downward direction with respect to the screen, the control unit controls so that the menus on the leftward and downward faces are displayed. If the manipulation by slanting is inputted in the right-upward direction with respect to the screen, the control unit controls so that the menus on the rightward and upward faces are displayed. If the manipulation by slanting is inputted in the right-downward direction with respect to the screen, the control unit controls so that the menus on the rightward and downward faces are displayed. 
     By the processing explained above, the mobile phone  100  displays the 3D GUI with menus on the specific face and the adjoining faces, and controls the 3D GUI according to the manipulation by slanting. Accordingly, the user is able to see new menus by simply slanting the mobile phone  100 , and use otherwise complicated menus with increased ease. 
       FIGS. 3A to 3D  illustrate a process of displaying a menu on the leftward face when the specific face  310  of the 3D GUI is displayed on the screen, according to the present invention. Referring to  FIG. 3A , the specific face  310  of the 3D GUI includes the GUI screen generally displayed on the mobile phone  100  when there is no slanting of the mobile phone  100 . 
       FIG. 3B  illustrates the state when the mobile phone  100  is slanted slightly leftward. Referring to  FIG. 3B , the leftward face  320  of the 3D GUI appears as the mobile phone  100  slightly slants leftward.  FIG. 3C  illustrates the screen of the mobile phone  100  slanting further in the leftward direction in which case the entirety of the leftward face  320  is displayed. 
     As explained above, the mobile phone  100  displays the face in the corresponding direction when the manipulation by slanting is inputted to a specific direction. 
       FIG. 4  illustrates the structure of the 3D GUI  400  according to an embodiment of the present invention. Referring to  FIG. 4 , the 3D GUI  400  is implemented as a rectangular parallelepiped having five faces. 
     If the 3D GUI  400  slants upward in a state that the specific face  410  of the 3D GUI  400  is displayed, the upward face  420  is displayed. If the 3D GUI  400  slants downward in a state that the specific face  410  of the 3D GUI  400  is displayed, the downward face  430  is displayed. If the 3D GUI  400  slants leftward in a state that the specific face  410  of the 3D GUI  400  is displayed, the leftward face  440  is displayed. If the 3D GUI  400  slants rightward in a state that the specific face  410  of the 3D GUI  400  is displayed, the rightward face  450  is displayed. 
     Accordingly, the mobile phone  100  generates a 3D GUI constructed based on the five faces of the rectangular parallelepiped, and displays the generated 3D GUI on a screen. 
       FIG. 5  illustrates a mobile phone having a motion start button  500  thereon according to an embodiment of the present invention. Referring to  FIG. 5 , if the user presses the motion start button  500 , the mobile phone  100  starts detecting for motion with respect to the current plane of the mobile phone  100  as the reference plane. Accordingly, the mobile phone  100  perceives the manipulation by slanting. 
     Although the mobile phone  100  is illustrated in  FIG. 5  as it includes the motion start button  500 , the mobile phone  100  may perceive the beginning of the motion based on other types of manipulation. 
       FIGS. 6A to 6C  illustrate the displaying of the leftward menu and of displaying the leftward and upward menus concurrently, according to the present invention. 
       FIG. 6A  illustrates an instance when the menu is displayed on the specific face and the mobile phone  100  is not slanted. In this state, if a manipulation by slanting in leftward direction is inputted to the mobile phone  100 , the mobile phone  100  displays the menu on the leftward face  610  as illustrated in  FIG. 6B . 
     If a manipulation by slanting in left-upward direction is inputted to the mobile phone  100 , the mobile phone  100  displays the menu on the leftward face  610  and the menu on the upward face  620  concurrently as illustrated in  FIG. 6C . Accordingly, in response to a manipulation by slanting in the diagonal direction, the menus on two faces are displayed concurrently. 
       FIGS. 7A to 7D  illustrate the process of selecting a lower menu using the 3D GUI menu according to an embodiment of the present invention. The menu has a hierarchy structure which includes a first level, a second level, a third level, and a fourth level. 
     Referring to  FIG. 7A , if a user slants the mobile phone  100  rightward direction from a state that the mobile phone  100  displays the menu on the specific face  700  of a first level, as illustrated in  FIG. 7B , a menu in the second level is displayed on the rightward face  720  as the subordinate menu to the first level. 
     In the state illustrated in  FIG. 7B , if the user selects one item from the menu in the first level, as illustrated in  FIG. 7C , the menu in the second level which is subordinate menu to the selected item, is displayed on the specific face  700 . The menu in the first level is displayed on the leftward face  710 , and a menu in the third level is displayed on the rightward face  720 . The ‘third level’ herein refers to the subordinate menu of the menu in the second level. 
     In the state illustrated in  FIG. 7B , if the user selects one item from the menu in the first level displayed on the rightward face  720 , as illustrated in  FIG. 7D , the menu in the third level which is subordinate menu to the selected item, is displayed on the specific face  700 . The menu in the second level is displayed on the leftward face  710 , and a menu in the fourth level is displayed on the rightward face  720 . The ‘fourth level’ herein refers to the subordinate menu of the menu in the third level. 
     As explained above, using the 3D GUI in the rectangular parallelepiped shape, the user is able to select the upper or lower menus with respect to the menu currently displayed on the specific face. 
       FIGS. 8A to 8D  illustrate the process in which the user selects an item displayed on the specific face, according to an embodiment of the present invention. 
       FIG. 8A  illustrates a state in which icons  801  of the main menu are displayed on the 3D GUI of the screen of the mobile phone. In this state, if a manipulation by slanting in leftward direction is inputted to the mobile phone  100 , as illustrated in  FIG. 8B , the leftward face  810  of the 3D GUI is displayed. 
     Referring to  FIG. 8B , in response to the selection of a camera icon  805  by the user, all the icons except the camera icon  805  move to the leftward face  810  as illustrated in  FIG. 8C . Referring to  FIG. 8D , the mobile phone  100  displays the icons  820  representing the subordinate menus of the camera icon, on the specific face. 
     Through the process explained above, the mobile phone  100  displays the subordinate menus of the user selected icon on the specific face  800 , and displays the other non-selected icons on the leftward face  810 . 
       FIGS. 9A to 9D  illustrate the process of selecting an item on the menu displayed on the leftward face  910 , according to an embodiment of the present invention. 
       FIG. 9A  illustrates the state where the main menu on the specific face  900  of the 3D GUI is displayed on the screen of the mobile phone  100 , which is not slanted. Referring to  FIG. 9A , as the user selects the music icon  905 , the mobile phone  100  displays the music list  907  on the specific face  900  as illustrated in  FIG. 9B . If a manipulation by slanting is inputted in the leftward direction to the mobile phone  100 , as illustrated in  FIG. 9C , the mobile phone  100  displays the leftward face  910  of the 3D GUI. At this time, there are icons of the main menu, i.e., upper menus, displayed on the leftward face  910 . 
     In this state, if the user selects a phonebook icon  915  on the leftward face  910  as illustrated in  FIG. 9C , the mobile phone  100  displays the phonebook  920  on the specific face  900  as illustrated in  FIG. 9D . 
     As explained above, the mobile phone  100  may display on the leftward face  910  the upper menu of the menu currently displayed on the specific face  900 . Accordingly, the user is able to see the upper menu easily by simply slanting the mobile phone  100  in the leftward direction. 
       FIGS. 10A to 10D  illustrate the process of bookmarking on a menu displayed on the rightward face  1020  according to an embodiment of the present invention. 
       FIG. 10A  illustrates a state in which the main menu on the specific face  1000  of the 3D GUI is displayed on the screen of the mobile phone  100 . Referring to  FIG. 10A , if a user selects a music icon  1005 , the mobile phone  100  displays a music list  1007  on the specific face  1000 , as illustrated in  FIG. 10B . If a manipulation by slanting in the rightward direction is inputted to the mobile phone  100 , the mobile phone  100  displays the rightward face  1020  of the 3D GUI as illustrated in  FIG. 10C . Bookmark icons are displayed on the rightward face  1020 . 
     In the state explained above, if the user drags the fifth bookmark icon  1025  on the rightward face  1020  to a specific item  1030 , the mobile phone  100  indicates that the specific item  1030  is bookmarked as illustrated in  FIG. 10D . 
     As explained above, the mobile phone  100  may display bookmark icons on the rightward face  1020 . Accordingly, by slanting the mobile phone  100  in the rightward direction, the user may check the bookmarks easily. 
       FIGS. 11A to 11D  illustrate the process of displaying the widget on the specific face using the menu displayed on the leftward face  1100 , according to an embodiment of the present invention. 
       FIG. 11A  illustrates the state in which the main menu on the specific face  1100  of the 3D GUI is displayed on the screen of the mobile phone  100 . If the mobile phone  100  is slanted leftward, the mobile phone  100  starts displaying the leftward face  1110  of the 3D GUI as shown in  FIG. 11B . 
     If the mobile phone  100  is slanted further in the leftward direction, as illustrated in  FIG. 11C , the entire leftward face  1110  is displayed. The widget icons are displayed on the leftward face  1110 . Referring to  FIG. 11C , if the user drags-and-drops the calendar widget  1115  to the area of the specific face  1100 , as illustrated in  FIG. 11D , the mobile phone  100  displays the calendar widget  1115  on the specific face  1100 . 
       FIGS. 12A to 12D  illustrate the process of moving the widget from the specific face to the item of the menu displayed on the leftward face  1210 . 
       FIG. 12A  illustrates the state in which the main menu on the specific face  1200  of the 3D GUI is displayed on the screen of the mobile phone  100 . Referring to  FIG. 12A , the calendar widget  1205  is displayed together on the specific face  1200 . Referring to  FIG. 12B , if the user drags-and-drops the calendar widget  1205  to the leftward face  1210 , the calendar widget icon disappears from the specific face  1200  and is displayed on the leftward face  1210  as illustrated in  FIG. 12C . Accordingly, referring to  FIG. 12D , the calendar widget is not displayed on the specific face  1200 . 
     As explained above, the mobile phone  100  may provide the widget using the leftward face  1210  of the 3D GUI. 
       FIGS. 13A to 13D  illustrate the process of displaying icons on the specific face with respect to a direction viewed by the user, according to an embodiment of the present invention. 
       FIG. 13A  illustrates the menu screen which is not slanted.  FIGS. 13B, 13C and 13D  illustrate the screen displayed when the mobile phone  100  is slanted at a gradually increasing angle in the leftward direction. When slanted in the leftward direction, the mobile phone  100  displays the menu screen slanted in the rightward direction in the 3D GUI to correspond to the leftward slanting thereof. Since the menu is slanted in the rightward direction, the user viewing the menu screen feels as if the menu is being viewed from the front. 
     As explained above, the mobile phone  100  displays the 3D GUI on the specific face and the adjoining faces to the specific face of the rectangular parallelepiped, and controls the 3D GUI based on the manipulation by slanting. Accordingly, the user is able to see new menus by simply slanting the mobile phone  100 , and thus use an otherwise complicated menu with increased ease. 
     Hereinbelow, a 2D GUI will be explained with reference to  FIGS. 14 to 15C .  FIG. 14  is a flowchart of the process of displaying a menu on a corresponding side of a 2D GUI, in response to an input of a manipulation by slanting of the mobile phone, according to an embodiment of the present invention. 
     At S 1400 , a manipulation by slanting motion is inputted to the mobile phone  100 . At S 1410 , the mobile phone  100  displays the menu on at least one of upward, downward, leftward and rightward sides of the screen of the mobile phone  100  that corresponds to the direction of the manipulation by slanting. 
       FIGS. 15A to 15C  illustrate the process of displaying a menu on a corresponding side of a 2D GUI of the mobile phone, in response to an input of a manipulation by slanting motion, according to an embodiment of the present invention. 
       FIG. 15A  illustrates the screen of the mobile phone  100  on which the main menu  1500  is displayed. Referring to  FIG. 15B , if the mobile phone  100  is slanted gradually in the leftward direction, the mobile phone  100  starts displaying the submenu  1510  on the left side. If the mobile phone  100  is slanted further in the leftward direction, the mobile phone  100  displays the entire submenu  1510  on the left side, as shown in  FIG. 15C . 
     As explained above, the mobile phone  100  may provide a 2D GUI environment and display the menu on the side corresponding to the direction of slanting, if a manipulation by slanting motion is inputted to the mobile phone  100 . 
     Although in the foregoing description the 3D GUI is implemented based on five faces of the rectangular parallelepiped, this description is given for illustrative purposes only, and the 3D GUI may be constructed with two to four faces of the rectangular parallelepiped. 
     Furthermore, any GUI is implementable according to an embodiment of the present invention, provided that the GUI is capable of displaying a menu based on the user manipulation by slanting the mobile phone. In other words, the 3D GUI according to an embodiment of the present invention is applicable to not only the rectangular parallelepiped, but also the other types of polygons. 
     Furthermore, the faces of the 3D GUI may display different contents or applications, or the like. 
     Hereinafter, a 3D GUI on which an application execution screen is displayed will be explained with reference to  FIGS. 16A to 17C , which illustrate the mobile phone  100  held by a user in landscape orientation. 
       FIGS. 16A and 16B  illustrate the structure of 3D GUI displaying an application execution screen and an application list, according to an embodiment of the present invention. 
     Referring to  FIG. 16A , the mobile phone  100  displays the currently-executed application on the specific face  1600  of the 3D GUI. Additionally, based on the order of application arrangement, the mobile phone  100  displays the preceding application on the upward face  1610 , and displays the following application on the downward face  1620 . The mobile phone  100  displays the list of the currently-executed applications on the leftward face  1630 . 
       FIG. 16B  illustrates a screen of the mobile phone  100  on which the 3D GUI with the above-explained structure is displayed. 
       FIGS. 17A to 17C  illustrate the process of using the 3D GUI in  FIG. 16B , on which application is displayed. 
       FIG. 17A  illustrates an example in which a screen of executing the application ‘APP 2’ is displayed on the specific face  1600  on the screen of the mobile phone  100 . In  FIG. 17A , the specific face  1600  is displayed as a full screen. 
     If a user manipulates a specific button  1700  arranged on the mobile phone  100 , the mobile phone  100  displays the 3D GUI on the screen as illustrated in  FIG. 17B . 
       FIG. 17B  illustrates an example in which the 3D GUI is displayed on the screen of the mobile phone  100 . The 3D GUI indicates ‘APP 1’ on the upward face  1610  as the application preceding ‘APP 2’ and ‘APP 3’ on the downward face  1620  as the application following ‘APP 2’. The 3D GUI additionally displays a list of applications on the leftward face  1630 . 
     In the state explained above, if a manipulation by touch (i.e., stroke) is inputted in a downward direction as illustrated in  FIG. 17B , the mobile phone  100  displays the preceding application (i.e., application on the upward face  1610 ) as illustrated in  FIG. 17C . Accordingly, referring to  FIG. 17C , the 3D GUI indicates ‘APP 0’ on the upward face  1610  as the preceding application to ‘APP 1’, and ‘APP 2’ on the downward face  1620  as the following application to ‘APP 1’. 
     As explained above, the user is able to select or change the currently-executed application using the 3D GUI. 
     Furthermore, the mobile phone  100  may adjust the direction of displaying the 3D GUI according to the direction viewed by the user. 
       FIGS. 18A and 18B  illustrate the process in which the mobile phone  100  adjusts the direction in which the 3D GUI is displayed, according to the direction viewed by the user. 
     The mobile phone  100  detects the direction viewed by the user, to adjust the displaying of the 3D GUI to correspond to the direction viewed by the user. Specifically, the mobile phone  100  perceives the user&#39;s face using a camera (not illustrated) attached on the front of the phone  100 , and detects the location of the user&#39;s face. The mobile phone  100  includes the acceleration sensor and the gyro sensor, and using the accelerator sensor and the gyro sensor, detects the posture of the mobile phone  100 . The mobile phone then detects the direction viewed by the user, using the information regarding the user&#39;s face and the posture information of the mobile phone  100 . The mobile phone  100  adjusts the direction of the 3D GUI so that the direction viewed by the user is in a perpendicular relationship with the specific face  1800  of the 3D GUI on which the main screen is displayed. 
       FIG. 18A  illustrates the screen of the mobile phone  100  viewed by the user from the right direction. Referring to  FIG. 18A , if the user views the screen from the right to the left, the mobile phone  100  displays the specific face  1800  at a rightward inclination on the 3D GUI. 
       FIG. 18B  illustrates the screen of the mobile phone  100  viewed by the user from the left direction. Referring to  FIG. 18B , if the user views the screen from the left to the right, the mobile phone  100  displays the specific face  1800  at a leftward inclination on the 3D GUI. 
     Since the mobile phone  100  displays the 3D GUI in accordance with the direction viewed by the user who is watching the mobile phone  100  from a side, the user experiences an increased convenience in using the 3D GUI. Meanwhile, although the examples explained above employ the mobile phone  100  as the display apparatus, this is written only for illustrative purposes. Accordingly, any display apparatus can be implemented according to an embodiment of the present invention, provided that the display apparatus is capable of providing a GUI. For example, a MP3 player, a Point to MultiPoint (PMP), a personal data assistant, a netbook or a notebook may be implemented. 
     While the invention has been shown and described with reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention, as defined by the appended claims.