Abstract:
A display method including the steps of displaying document data and/or content data including a plurality of objects, controlling an arrangement position of a translucent focus area on a display unit, where the focus area is provided to make the object enter a selection state, detecting a position on the display unit, where a user contacts the display unit at the position, and moving the focus area as the contact position is moved when the detected arrangement position of the focus area is approximately equivalent to the detected contact position is provided.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a display apparatus, a display method, and a program that can be appropriately used for, for example, a mobile terminal provided with a touch panel. 
         [0003]    2. Description of the Related Art 
         [0004]    In the past, when text data (hereinafter referred to as document data) displayed on a display screen image and/or an object included in content data such as video, the object including word data, photograph data, etc., was selected by a user, information attached to the object was displayed as a pop-up menu. For example, when the object included data of an English word, a Japanese equivalent for the English word was displayed as the attached information, and when the object was an icon indicating some function, help information relating to the function was displayed. 
         [0005]    The attached information of the object is displayed when the right button of a mouse is clicked when the cursor of the mouse is arranged on a certain object and/or when the cursor is arranged on a predetermined object. When the right mouse button is clicked, the attached information is displayed as a context menu, etc., and when the cursor is placed on the object, the attached information is displayed through a tooltip or the like. 
         [0006]    For example, Japanese Unexamined Patent Application Publication No. 1-283583 discloses a technology for displaying information about a function indicated by an icon as a pop-up menu at the time when a cursor is placed on the icon. 
       SUMMARY OF THE INVENTION 
       [0007]    In recent years, touch panels have been increasingly used for apparatuses including a mobile phone terminal, a personal digital assistant (PDA), a game terminal, etc. When the touch panel is used as a user interface, the user of the apparatus can operate the apparatus through intuition. Further, since another user interface including a mouse, etc. may not be provided, the mobility of the apparatus is increased. 
         [0008]    In the case where the touch panel is used, a tap operation achieved by lightly tapping on the image area is often associated with the most appropriate behavior for an object arranged at the position of the tapped part of the image area. For example, when the image area is tapped at a position where a predetermined track is displayed while data of a player provided to reproduce music data and the track list are displayed on the display screen image, the track is not only simply selected but also reproduced. 
         [0009]    For performing the same operation by using a mouse, different operations may be individually assigned to different types of behaviors. For example, a single click may be performed to select a track and a double click may be performed to reproduce the track. In the case where the touch panel is used, the operation corresponding to the double click is a double tap. However, since it is difficult to perform the double tap on the touch panel in terms of human engineering, the double tap has hardly been performed as the trigger of some behavior. That is to say, in the case where the touch panel is used, it becomes difficult to perform various kinds of operations that can be performed through the mouse. 
         [0010]    Accordingly, for achieving the above-described operation performed to display the attached information of the object through the tooltip on the touch panel, it is eligible to create the state where attention is given to a certain object even though the object is not tapped. The use of a touch panel that can detect the magnitude of a pressure put on the display screen image allows for differentiating between the state where the attention is given to a certain object even though the object is not tapped and the state where the object is selected. Further, it becomes possible to display the attached information of the object as a pop-up menu in the former state. 
         [0011]    However, if it is difficult for the user to adjust the pressure with high precision, the usability of the above-described user interface is low for the user. 
         [0012]    Accordingly, the present invention allows for performing various kinds of behaviors (operations) in an apparatus including a touch panel through the same operation. 
         [0013]    A display apparatus according to an embodiment of the presenting invention includes a display unit configured to display document data and/or content data including a plurality of objects, a focus-position control unit configured to control an arrangement position of a translucent focus area on the display unit, where the focus area is provided to make the object enter a selection state, and a contact-position detection unit configured to detect a position on the display unit, where a user contacts the display unit at the position. Further, the display apparatus includes a display control unit configured to move the focus area as the contact position is moved when the controlled arrangement position of the focus area is approximately equivalent to the detected contact position, and perform a predetermined operation associated, in advance, with an operation performed by the user to achieve the contact when the arrangement position of the focus area is different from the contact position. 
         [0014]    Consequently, when the contact operation is performed when the focus area is arranged at the contact position, the object is made to enter the selection state. If the same contact operation is performed when the contact position is different from the arrangement position of the focus area, a predetermined behavior is performed. 
         [0015]    The present invention allows for achieving various types of behaviors through the same operation since the type of a behavior performed in a display apparatus varies based on whether a focus area is arranged on the position of a part contacted by a user. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0016]      FIG. 1  is an external view of a mobile terminal exemplarily configured according to an embodiment of the present invention; 
           [0017]      FIG. 2  is a block diagram showing an exemplary internal configuration of a mobile terminal according to an embodiment of the present invention; 
           [0018]      FIG. 3  is a flowchart showing exemplary processing procedures performed by a mobile terminal according to an embodiment of the present invention; 
           [0019]      FIG. 4  is an illustration showing the state where a focus area according to an embodiment of the present invention is arranged on word data; 
           [0020]      FIG. 5  is an illustration showing an exemplary image displayed when a focus area according to an embodiment of the present invention is moved; 
           [0021]      FIG. 6  is another illustration showing the state where a focus area according to an embodiment of the present invention is arranged on word data; 
           [0022]      FIG. 7  is an illustration showing an exemplary image displayed when a contact position is different from a focus arrangement position according to an embodiment of the present invention; 
           [0023]      FIG. 8  is an illustration of an exemplary scroll operation performed as a contact position is moved according to an embodiment of the present invention; 
           [0024]      FIG. 9  is a flowchart showing exemplary processing procedures performed by a mobile terminal according to another embodiment of the present invention; 
           [0025]      FIG. 10  is an illustration showing an example where a focus area according to another embodiment of the present invention is arranged at an end part of an image area; 
           [0026]      FIG. 11A  is an illustration showing exemplary transition of the state of a focus area according to another embodiment of the present invention; 
           [0027]      FIG. 11B  is another illustration showing the exemplary transition of the state of the focus area; 
           [0028]      FIG. 11C  is another illustration showing the exemplary transition of the state of the focus area; 
           [0029]      FIG. 11D  is another illustration showing the exemplary transition of the state of the focus area; 
           [0030]      FIG. 12  is a state transition diagram showing exemplary transition of the state of a focus area according to another embodiment of the present invention; 
           [0031]      FIG. 13  is a flowchart showing exemplary processing procedures performed by a display control unit according to another embodiment of the present invention; 
           [0032]      FIG. 14  is an illustration showing the state where a focus area according to another embodiment of the present invention is arranged on the image of a person shown on a photograph; 
           [0033]      FIG. 15  is an illustration showing the state where a focus area according to another embodiment of the present invention is arranged on the image of a photograph; 
           [0034]      FIG. 16A  is an external rear view of a mobile terminal exemplarily configured according to another embodiment of the present invention; and 
           [0035]      FIG. 16B  is an external front view of the above-described mobile terminal. 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     1. First Embodiment 
       [0036]    Hereinafter, a first embodiment of the present invention will be described with reference to the attached drawings. A display apparatus according to the above-described embodiment is used for a mobile terminal provided with a touch panel.  FIG. 1  is an external view of an exemplary mobile terminal  10  according to the above-described embodiment. A display unit  1  including a liquid crystal panel, an organic electro luminescence (EL) panel, and so forth is provided on the front face of the mobile terminal  10 , and document data including text data, photograph data, and so forth is displayed on the image area of the display panel. In the following description, each of components including word data, photograph data, data of the face of a person shown in the photograph, and so forth that are included in the document data is referred to as an object. 
         [0037]    A focus area F which is translucent and formed into a waterdrop shape (oval) is provided on the right side of the center part of the image area of the display apparatus  1 . The focus area F is a user interface provided to determine an object used to display attached information. When the object is determined through the focus area F, the attached information of the determined object is displayed near the focus area F through a tooltip. It is arranged that the size of the focus area F shall be changed based on the size of the determined object. 
         [0038]    If the object includes, for example, data of a word, the attached information may be data of an equivalent for the word. In the case where the object includes, for example, data of a photograph, the attached information may be information about, for example, the place and the time when the photograph is taken. Further, when the object includes, for example, data of the face of a person, information about the name, etc. of the person may be displayed as the attached information. The position of the focus area F may be moved by a user performing a drag operation achieved by touching (contacting) the focus area F by a finger, a pen, etc. and moving the focus area F while maintaining the contact state. 
       [Exemplary Configuration of Mobile Terminal] 
       [0039]      FIG. 1  is a block diagram showing an exemplary internal configuration of the mobile terminal  10 . The mobile terminal  10  shown in  FIG. 1  includes a display unit  1 , a contact-position detection unit  2  configured to detect the position of a part contacted by the user, a focus-position control unit  3  configured to control the position of the focus area F, an arrangement-position-information-storage unit  4 , and a display control unit  5 . 
         [0040]    The focus-position control unit  3  arranges the focus area F at any position on the image area of the display unit  1  when the mobile terminal  10  is started, for example. Upon accepting an operation performed to move the position of the focus area F by the user, the focus-position control unit  3  moves the focus area F based on the operation. Information about the arrangement position of each of the objects shown on the document data, the objects including the word data, the photograph data, and so forth, is stored in the arrangement-position-information storage unit  4 . 
         [0041]    The display control unit  5  performs processing so as to scroll-display the document data based on the details of an operation performed by the user, display the attached information of an object specified by the focus area F as the tooltip. 
       [Exemplary Operations of Mobile Terminal] 
       [0042]    Next, exemplary processing procedures performed by the mobile terminal  10  according to the above-described embodiment will be described with reference to a flowchart shown in  FIG. 3 . At the outset, in the mobile terminal  10 , the contact-position detection unit  2  determines whether it is detected that the user contacts the image area at step S 1 . If no contact made by the user is detected, the determination made at step S 1  is made repeatedly. If the contact made by the user is detected, it is determined whether the focus area F is placed at the position where the contact is made at step S 2 . 
         [0043]    When the focus area F is placed at the position, the focus area F is moved under the control of the display control unit  5  based on the contact position moved based on the drag operation performed by the user at step S 3 . Next, it is determined whether the movement of the contact position is stopped, that is to say, it is determined whether the user stops performing the drag operation for the focus area F at step S 4 . If the contact position is not stopped, the processing corresponding to step S 3  is performed. If the contact position is stopped, it is determined whether or not the object is placed behind the focus area F at step S 5 . If the object is placed behind the focus area F, the attached information of the object is displayed near the focus area F as the tooltip at step S 6 . 
         [0044]      FIG. 4  shows the state where the attached information of the object is displayed near the focus area F. In  FIG. 4 , the focus area F is dragged by using a pen p and arranged on data of a word  01  shown as “gaming”. Further, information shown as “[n] gēmu” is displayed above the focus area F as a tooltip T. The information “[n] gēmu” indicates a Japanese equivalent for the English word “gaming”. Namely, the information “[n] gēmu” is the attached information of the information “gaming”. 
         [0045]    The display control unit  5  determines the details of the object placed behind the focus area F based on the information about the user&#39;s contact position detected by the contact-position detection unit  2 , the position of the focus area F, the position being perceived by the focus-position control unit  3 , and the arrangement position of each of the objects, where information about the arrangement position is stored in the arrangement-position-information storage unit  4 . Then, the attached information of the object specified by the focus area F is acquired and displayed on the image area as the tooltip T. 
         [0046]    Further, when the contact state is cancelled after the focus area F is arranged on a predetermined object by the user, the display control unit  5  performs control so that the focus area F stays on the object. Namely, the display control unit  5  performs control so that the arrangement position of the focus area F is the same as the arrangement position of the object until the focus area F is subsequently selected by the user and/or the speed of the contact position moved to scroll data shown on the image area is changed from a low speed to a different speed. 
         [0047]    The information about the equivalent for the object O 1 , which is displayed as the attached information, is generated by providing a dictionary tool or the like in the mobile terminal  10  beforehand and reading the above-described equivalent information determined based on the focus area F.  FIG. 4  shows the example where the object indicates the data of a word, and the information about the equivalent for the word is displayed as the attached information of the object. However, without being limited to the above-described embodiment, attached information that had been embedded by the writer of the document data at the document generation time may be extracted and displayed as the attached information. 
         [0048]    Returning to the flowchart shown in  FIG. 3 , it is determined, at step S 7 , whether or not the contact state where the finger and/or the pen of the user comes into contact with the image area is cancelled after the attached information of the object is displayed at step S 6 . If the contact state is maintained, the processing is returned to step S 3  so that the processing is continued. Namely, the position of the focus area F is moved in synchronization with the movement of the pen P under the control of the display control unit  5  as shown in  FIG. 5 . 
         [0049]    If it is determined that the movement of the contact position is stopped at step S 4  and the object is placed behind the focus area F, information shown as “[a] ōku-no” which indicates an equivalent for the term “many” shown as an object O 2  is displayed as the tooltip T, where the equivalent information “[a] ōku-no” is the attached information of the object O 2  as shown in  FIG. 6 . If it is determined that the contact state is canceled at step S 7 , the processing is terminated. 
         [0050]    On the other hand, if it is determined that the focus area F is not placed at the contact position at step S 2 , a position specified on the document data through the contact is moved as the contact position is moved based on the drag operation performed by the user at step S 8 . Then, it is determined whether or not the contact state is cancelled at step S 9 . If it is determined that the contact state is maintained, the processing is returned to step S 8  and the processing is continued. If the contact state is cancelled, the processing is terminated. 
         [0051]      FIG. 7  shows the case where the arrangement position of the focus area F is different from the position of a part contacted by the user by using the pen P according to the above-described embodiment. In  FIG. 7 , the focus area F is arranged on the word “written”. Consequently, attached information shown as “[a] kakareta” which is an equivalent for the word “written” is displayed as the tooltip T.  FIG. 7  also shows that the tip of the pen P points a part different from the arrangement position of the focus area F. 
         [0052]      FIG. 8  shows an exemplary display image obtained when the tip of the pen P is moved in a direction “A” while the tip of the pen P is kept in contact with the image area.  FIG. 8  also shows the state where the document data is scrolled in the direction of the upper part of the image area in accordance with the amount of the movement of the pen P. 
       Advantages of First Embodiment 
       [0053]    According to the first embodiment, the user moves the focus area F onto data of a word of which meaning is sought by the user, whereby the meaning of the word is displayed through the tooltip and confirmed by the user. Further, an image-area scroll operation of related art can be achieved by selecting and dragging a part of the image area, where the focus area F is not arranged on the part. 
         [0054]    Namely, since an object can be selected by moving the focus area F, it becomes possible to create the state where attention is given to a certain object even though the object is not tapped even though an apparatus including a touch panel is used. If the position of a part tapped by the user is different from the arrangement position of the focus area F, an originally expected behavior that had been associated with the tap operation can be achieved. Although the image-area scroll operation is exemplarily performed in the above-described embodiment, different behaviors such as enlarging photograph data, reproducing music data, etc. can be achieved through the tap operation. 
         [0055]    Further, since the focus area F is translucent and generated to have the waterdrop form, the user suffers from a reduced uncomfortable feeling caused by the focus area F while the size of the focus area F is large enough to surround the object including the word data, the photograph data, etc. Further, since the form of the focus area F can be increased in size compared to the cursor, etc., the user can easily select the focus area F with a finger and/or the pen P. Still further, since the focus area F is translucent, the information about the object itself selected by the focus area F can be displayed without being hidden. 
       2. Other Embodiments 
     Other Embodiment 1 
       [0056]    The above-described embodiment allows for switching back and forth between the operation performed to move the focus area F and that performed to scroll data shown on the image area based on the relationship between the position of the contact made by the user and the arrangement position of the focus area F. However, the present invention can be achieved without being limited to the above-described embodiment. For example, control may be performed so that the document data is scroll-displayed when the focus area F is arranged at an end part of the image area of the display unit  1  even though the focus area F is touched by the finger and/or the pen P of the user. 
         [0057]    Exemplary processing procedures performed by the mobile terminal  10  in the above-described embodiment will be described with reference to a flowchart shown in  FIG. 9 . According to the flowchart shown in  FIG. 9 , the description of the processing performed to display the attached information of the object specified by the focus area F is omitted. 
         [0058]    First, the contact-position detection unit  2  determines whether it is detected that the user contacts the image area at step S 11 . If no contact made by the user is detected, the determination made at step S 11  is made repeatedly. If the contact made by the user is detected, it is determined whether the focus area F is placed at the position where the contact is made at step S 12 . If the focus area F is not placed at the contact position, the processing corresponding to step S 8  shown in the flowchart of  FIG. 3  is performed. 
         [0059]    If the focus area F is placed at the contact position, the focus area F is moved under the control of the display control unit  5  in accordance with the contact position moved based on the drag operation performed by the user at step S 13 . Then, it is determined whether the focus area F is moved to the end part of the image area of the display unit  1  at step S 14 . If the focus area F is moved to the end part, the display position of the document data currently displayed on the image area is moved in the direction of the position where the focus area F is arranged at step S 15 . That is to say, processing is performed to scroll the document data when the focus area F is arranged at the end of the image area even though the focus area F is touched by the finger and/or the pen P of the user. 
         [0060]    If it is determined that the focus area F is not moved to the end part of the image area at step S 14 , it is subsequently determined whether the state where the image area is touched by the user is cancelled at step S 16 . If the contact state is not cancelled, the processing is returned to step S 13  so that the processing is continued. If the contact state is cancelled, the processing is terminated. 
         [0061]    The above-described processing is performed so that when the focus area F is arranged at the upper end of the image area, the document data is scrolled in the direction where the focus area F is arranged, where the direction is indicated by the sign “B”, even though the focus area F is selected by the pen P as shown in  FIG. 10 . Consequently, when the focus area F is moved to an end part of the image area while the focus area F is moved based on the drag operation, the moving operation can be seamlessly shifted to an operation performed to scroll the document data without changing the details of the operation. 
       Other Embodiment 2 
       [0062]    According to the above-described embodiments, the attached information of the object specified based on the arrangement position of the focus area F is displayed when the focus area F is arranged on any object by the user and the focus area F is stopped. However, the present invention can be achieved without being limited to the above-described embodiment. For example, when the focus area F is brought closer to a predetermined object, control may be performed so that the focus area F is attached to the object. 
         [0063]    Each of  FIGS. 11A ,  11 B,  11 C, and  11 D is the illustration of an exemplary movement of the focus area F, the movement being achieved in the above-described embodiment. In each of  FIGS. 11A to 11D , the position of the part contacted by the user is indicated by a block dot. The focus area F is indicated by an oval and the object is indicated by a square. An object arranged on the left is an object O 10 , and that arranged on the right is an object O 11 . In each of the  11 A to  11 D, the contact position is indicated by the black dot so as to easily understand the description. However, the contact position is not actually displayed on the image area. 
         [0064]    According to a drawing shown on the left side of  FIG. 11A , the contact position C is arranged on the left side of the object O 10 , and the contact position C and the object O 10  are separated by a large distance. Therefore, the focus area F is arranged at the contact position C and is not attached to the object O 10 . The right side of  FIG. 11A  shows an example where the contact position C is moved from where the contact position C had been in the above-described state to the right. As shown in the right side of the  FIG. 11A , the contact position C is moved into the object O 10 . Therefore, the focus area F is attached to the object O 10  and the shape of the focus area F is changed so that the object O 10  is covered (surrounded) by the focus area F. 
         [0065]    As long as the contact position C is in the object O 10  as shown in the left side and the right side of  FIG. 11B , the focus area F is not moved from the arrangement position of the object O 10 . Further, if the contact position C is slightly moved from where it had been in the above-described state and out of the object O 10 , the focus area F does not leave the object O 10  as long as the contact position C is placed near the object O 10 . If the contact position C is outside and sufficiently away from the object O 10 , the focus area F leaves the object O 10 . When the contact position C is further moved from where it had been in the above-described state to the right and brought closer to the object O 11 , the focus area F is attached to the object O 11 . The attach operation of the focus area F is set in advance so as to be performed when the focus area F is brought closer to the areas within a some-millimeter radius of the object. 
         [0066]      FIG. 12  shows the above-described operations of the focus area F as a state transition diagram. If the contact position C is outside the object and the focus area F does not specify any object so that a state S 21  is attained, the state S 21  is not changed as long as the contact position C is stayed outside the object. If the contact position C is moved into the object in the state S 21 , the state is caused to transition to a state S 22 . Namely, the state where the contact position C is inside the object and the focus area F specifies the object is attained. The above-described state S 22  is maintained as long as the contact position C is in the object. 
         [0067]    If the contact position C is moved out of the object, the state is caused to transition to a state S 23 . Namely, the contact position C is outside the object and the focus area F specifies the object. The state  23  is not changed as long as the contact position C is near the object. However, if the contact position C is sufficiently away from the object, the state is caused to transition to the state S 21 . Namely, the state is changed to a state where the focus area F does not specify any object. On the other hand, when the contact position C is moved away from the object and into a different object, the state is caused to transition to the state S 22  so that the focus area F specifies a different object. 
         [0068]    The above-described processing procedures are performed so that the focus area F is automatically attached to a predetermined object even though the user does not correctly arrange the focus area F on the predetermined object. Namely, it becomes possible to arrange the focus area F on the predetermined object through a simple operation. Since the focus area F hardly leaves the object in that case, the user can confirm the attached information of the object specified by the focus area F with stability even though the document data is scrolled, for example. 
       Other Embodiment 3 
       [0069]    According to the above-described embodiments, the focus area F has the oval waterdrop form. However, the form of the focus area F may be changed to a different form based on the object type.  FIG. 13  is a flowchart showing exemplary processing procedures performed in such cases by the display control unit  5  shown in  FIG. 2 . 
         [0070]    First, it is determined whether the focus area F is arranged on the data of a word at step S 31 . If the focus area F is arranged on the word data, processing is performed to change the form of the focus area F into a circle at step S 32 . If the focus area F is not arranged on the word data, it is determined whether the focus area F is arranged on the data of the person&#39;s image, the image data being shown on the photograph at step S 33 . If the focus area F is arranged on the image data, the form of the focus area F is changed into a square.  FIG. 14  indicates an exemplary display image shown in the above-described embodiment.  FIG. 14  shows the state where the focus area F is arranged on the face part of a person shown on photograph data O 2  and the form of the focus area F is changed into the square. Further, the name “John Smith” is displayed through the tooltip T as the attached information of the person. 
         [0071]    Returning to the flowchart of  FIG. 13 , when it is determined that the focus area F is not arranged on the part of the person&#39;s image shown on the photograph data, it is determined whether the focus area F is arranged on a part of the photograph data, the part showing anything other than the person&#39;s image, at step S 35 . If it is determined that the focus area F is arranged on the photograph data, the form of the focus area F is changed into a triangle at step S 36 .  FIG. 15  shows an exemplary display image attained in the above-described embodiment.  FIG. 15  shows the state where the focus area F is arranged on photograph data  03  and the form of the focus area F is changed into the triangle. Further, information about the title “Butterfly in Okinawa” is displayed through the tooltip T as the attached information of the photograph data. 
         [0072]    If it is determined that the focus area F is not arranged on the photograph data at step S 35  shown in  FIG. 13 , the form of the focus area F is changed into a small square at step S 37 . 
         [0073]    Thus, the form of the focus area F is changed based on the type of the object. Consequently, when the attached information of the object is displayed as the tooltip T, it becomes easy to visually understand to which object the attached information corresponds. For example, when the form of the focus area F is a triangle, it becomes possible to understand, at first sight, that the attached information indicated by the tooltip T is the attached information of the photograph data even though many items of data including word data, photograph data, and so forth are arranged near the tooltip T. 
       Other Embodiment 4 
       [0074]    Further, in the above-described embodiments, the mobile terminal  10  provided with the touch panel including the display unit  1  and the contact-position detection unit  2  that are integrated into each other is exemplarily described. However, according to another embodiment of the present invention, the configuration may be changed so that a second contact-position detection unit  2 A is provided on the back face of the mobile terminal  10 . 
         [0075]    Each of  FIGS. 16A and 16B  shows an external view of a mobile terminal  10 A provided with the second contact-position detection unit  2 A on the back face of the mobile terminal  10 A.  FIG. 16A  shows the rear view of the mobile terminal  10 A and  FIG. 16B  shows the front view of the mobile terminal  10 A. According to  FIG. 16A , the second contact-position detection unit  2 A is provided on the entire back face of the mobile terminal  10 A. The user can move the focus area F and/or scroll the document data by performing the drag operation by touching the second contact-position detection unit  2 A with a finger, etc. 
         [0076]    Further, as shown in  FIG. 16B , the user can move the focus area F and/or scroll the document data by touching a part of the image area of the display unit  1  provided on the entire face of the mobile terminal  10 A with a finger, the pen P. etc. and moving the contact position by performing the drag operation. According to the above-described mobile terminal  10 A, the document data can be scrolled while the arrangement position of the focus area F is fixed by moving the finger on the second contact-position detection unit  2 A provided on the back face while pointing the position of the focus area F on the display unit  1  provided on the front face with the tip of the pen P. 
         [0077]    According to the above-described configuration, the user can fix and/or move the position of the focus area F to an appropriate position while scrolling the document data by using a finger. Namely, the selection operation and the scroll operation can be performed at the same time. 
         [0078]    According to the above-described embodiments, only the single focus area F is displayed on the image area. However, a plurality of the focus areas F may be displayed on the image area so that at least two items of the attached information of a plurality of objects can be displayed at the same time. In that case, the focus area F may be separated into two parts in the middle or around by performing an operation as if to cut the focus area F from top to bottom with a finger and/or the pen P. Further, an operation achieved by dragging both the ends of the focus area F in different directions and/or a double-tap operation achieved by tapping the image area twice may be associated with an operation performed to display the separated parts of the focus area F. 
         [0079]    Further, according to the above-described embodiments, the focus area F is automatically displayed when the mobile terminal  10  is started. However, it may be configured that the user can switch between the state where the focus area F is displayed and the state where the focus area F is not displayed. 
         [0080]    Further, according to the above-described embodiments, the attached information of the object specified by the focus area F is displayed, for example. However, help information relating to the object may be displayed. Namely, the details of a context menu displayed when the click of the right mouse button is accepted may be displayed. 
         [0081]    Further, according to the above-described embodiments, the display apparatus is used for the mobile terminal  10  ( 10 A). However, without being limited to the above-described embodiments, the display apparatus may be used for a different apparatus provided with a touch panel, such as a mobile phone, a game terminal, a personal computer, and so forth. 
         [0082]    The present application contains subject matter related to that disclosed in Japanese Priority Patent Application JP 2008-207432 filed in the Japan Patent Office on Aug. 11, 2008, the entire content of which is hereby incorporated by reference. 
         [0083]    It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof.