JP5854158B2 - Information display device and control program thereof - Google Patents

Description

  The present invention relates to an information display device for searching and displaying data classified into a hierarchical structure, such as an electronic picture book and encyclopedia, from the upper layer to the lower layer, and a control program therefor.

  In a conventional electronic dictionary device, as a function for searching various kinds of dictionary information, there is a “headword search” function for searching from a headword that matches the search character string input by the user.

  On the other hand, there is a “search from figure” function as a function for searching dictionary information categorized into a hierarchical structure such as a pictorial book or encyclopedia containing pictures and photographs as explanation information of each headword.

  With this “Search from Figure” function, you can reach the desired data by selectively specifying the items of each category classified in order of major classification → middle classification → small classification → figure thumbnail → figure data. Can do. In this case, each item in the hierarchical major category, middle category, and minor category is also displayed as a figure thumbnail, and since these figures are selectively specified, the operation is simple and easy to use. It has become.

  However, this “search from figure” function is not problematic when items in each hierarchy are selected and traced in order from the top to the bottom, but when returning from a certain lower hierarchy to any higher hierarchy classification. , [ESC] (escape) keys need to be input for the number of layers to be returned.

  In the conventional information display apparatus, when the items of each hierarchy are sequentially selected from the upper hierarchy to the lower hierarchy, the items for each selected hierarchy are sequentially entered and displayed in the path list. Then, by selecting an entry in this path list, a method of controlling the display of hierarchical information that allows the route traced from the upper hierarchy to the lower order to be returned in order has been considered (for example, patents). Reference 1).

  In addition, when an item in the upper hierarchy is selected and changed to the menu display in the lower hierarchy, an animation for moving the selection item selected in the upper hierarchy to the title display position in the menu display in the lower hierarchy is executed. Then, by displaying the subsequent lower-level menu display with the display of the title, it is possible to grasp which level the user is currently in and to easily recognize the continuity of the hierarchy. A display method has been considered (see, for example, Patent Document 2).

JP 2000-003247 A JP 2006-338178 A

  In the conventional information display device, it is possible to reverse the route traced from the upper layer to the lower layer in accordance with the entry of the path list, or to easily grasp the current layer of the user. In some cases, it was inconvenient to return directly from a lower hierarchy to a hierarchy higher than a plurality of floors, or to select and view items of different categories in the same hierarchy. Furthermore, when the hierarchical structure of the information to be searched is deep, the hierarchical structure is difficult to understand.

  The present invention has been made in view of such a problem, and when tracing data classified into a hierarchical structure from an upper hierarchy to a lower hierarchy, the data can be moved to an arbitrary upper hierarchy by a simple operation or the same. An object of the present invention is to provide an information display device and a control program for the information display device that can change the state to a selection item of another classification in a hierarchy.

  The information display device according to the present invention displays the same item while displaying the hierarchical structure data classified for each hierarchy on the display unit from the upper hierarchy to the lower hierarchy according to the user operation. A data search means for selecting and searching for data, and an icon display means for displaying an icon indicating a classification of the selected item on the display unit each time a classification item of each hierarchy is selected by the data search means; In response to a user operation, when an icon displayed by the icon display means indicating a classification higher than the classification to which the item currently displayed on the display section belongs is specified, the same display on the display section is specified. The classification return control means for returning to the display of items belonging to the category indicated by the icon displayed, and the icon table indicating the category to which the item currently displayed on the display unit belongs in response to a user operation Classification transition control means for transitioning the display of the display section to the display of items belonging to another classification at the same level as the classification indicated by the designated icon when the icon displayed by the means is specified. It is characterized by that.

  According to the present invention, when data classified into a hierarchical structure is traced from an upper hierarchy to a lower hierarchy, the data can be moved to an arbitrary upper hierarchy by a simple operation, or can be selected as a selection item of another classification in the same hierarchy. It is possible to provide an information display device and its control program that can change the state.

The front view which shows the external appearance structure of the electronic dictionary apparatus 10 which concerns on embodiment of the information display apparatus of this invention. 2 is a block diagram showing a configuration of an electronic circuit of the electronic dictionary device 10. FIG. The figure which shows the data structure of [encyclopedia (picture book)] 22b4 memorize | stored in the dictionary database 22b of the said electronic dictionary apparatus 10. FIG. 7 is a flowchart showing category search processing executed in accordance with the information display control program 22a of the electronic dictionary device 10. The figure which shows the search display operation of [encyclopedia (picture book)] 22b4 accompanying the category search process of the said electronic dictionary apparatus 10. FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a front view showing an external configuration of an electronic dictionary device 10 according to an embodiment of the information display device of the present invention.

  The electronic dictionary device 10 is configured as a portable device dedicated to the electronic dictionary described below, or a PDA (personal digital assistants), a PC (personal computer), a mobile phone, an electronic book, and a portable game machine having a dictionary function. And so on.

  The electronic dictionary device 10 includes a foldable case in which a main body case 11 and a lid case 12 can be expanded / closed via a hinge portion 13. On the surface of the main body case 11 in which the folding case is developed, a character input key 14a, a dictionary designation key 14b, a [translation / decision] key 14c, a [return / list] key 14d, a cursor key 14e, a speaker 15, and the like are provided. A key input unit (keyboard) 14 and a touch panel type sub display unit 16 are provided.

  The sub display unit 16 has a structure in which a touch position detection device that detects a position touched by a user with a pen, a finger, or the like and a display device are integrated, and for example, 256 × 64 dots on the front side of the center of the key input unit 14. The transparent liquid crystal display screen 16d is overlaid with a transparent touch panel 16t. The area of the sub display unit 16 includes, as necessary, a handwritten character (kanji) input area for inputting handwritten characters, a key input area for specifying various functions, and data of dictionary data specified as a search target. It is switched to the display area of the structure list GB or an area where the respective areas are mixed.

  And the locus | trajectory accompanying the handwriting input in the state which the said sub display part 16 was switched to the handwritten character input area is echoed back and displayed on the color liquid crystal display screen 16d.

  Further, on the surface of the lid case 12, a touch panel type main display unit 17 with a backlight of, for example, 480 × 320 dots is provided for almost the entire surface. Similarly to the sub display unit 16, the main display unit 17 has a structure in which a touch position detection device that detects a position touched by a user with a pen, a finger, or the like and a display device are integrated, and a color liquid crystal display screen 17d. And a transparent touch panel 17t.

  At the left end of the touch panel type main display unit 17, a soft icon unit 17 </ b> A for displaying various icons for designating a function that can be executed according to an operation mode by a touch operation is provided.

  FIG. 2 is a block diagram showing the configuration of the electronic circuit of the electronic dictionary device 10.

  The electronic dictionary device 10 is configured by a computer that reads a program recorded on various recording media or a transmitted program and whose operation is controlled by the read program. The electronic circuit includes a CPU ( a central processing unit) 21 is provided.

  The CPU 21 is a device control program stored in advance in the storage device (flash ROM) 22 or a device control program read into the storage device 22 from the external recording medium 23 such as a ROM card via the recording medium reading unit 24, Alternatively, the operation of each part of the circuit is controlled according to a device control program read into the storage device 22 from the Web server 30 (in this case, the program server) 30 on the Internet N via the communication unit 25.

  The device control program stored in the storage device 22 is connected via an input signal according to a user operation from the key input unit 14, the touch panel sub display unit 16, or the touch panel main display unit 17, or the communication unit 25. Communication signals with each Web server 30 on the Internet N, or connection communication signals with a memory card (recording medium) 23 such as an EEPROM, RAM, ROM, etc. externally connected via the recording medium reading unit 24 Is activated.

  As described above, the CPU 21 includes the storage device 22, the recording medium reading unit 24, the communication unit 25, the key input unit 14, the touch panel sub display unit 16 (16d, 16t), and the touch panel main display unit 17 (17d, 17t). Etc. are connected.

  The device control program stored in the storage device 22 includes a system program that controls the overall operation of the electronic dictionary device 10, Web servers 30 on the Internet N via the communication unit 25, and a user PC (not shown) A communication program for data communication with a personal computer) is stored.

  In addition, a headword search process for searching for data according to the input search character string, a category search process for searching for hierarchical data classified into categories, and explanation information of the searched data (translation word, meaning / figure / commentary) Various information display control programs 22a for controlling the overall processing based on the dictionary database 22b stored in the storage device 22, such as the reading and display processing of the dictionary data, and the data structure list display processing of the dictionary data designated as the search target. Is memorized.

  As the dictionary database 22b, various dictionary data such as [Japanese language dictionary] 22b1, [English-Japanese dictionary] 22b2, [Japanese-English dictionary] 22b3, [Encyclopedia (picture book)] 22b4 are stored in advance or downloaded, and various types of dictionary data are stored. In the dictionary data, each headword and description information of each headword are associated and described.

  The dictionary data of [Encyclopedia (picture book)] 22b4 has a hierarchical structure of categories classified into large categories → medium categories → each data, and corresponds to the items of all categories and the headings of each data. Figures (photos, pictures, line drawings, etc.) corresponding to the contents of the headings are added.

  For example, the main display unit 17 of the electronic dictionary device 10 in FIG. 1 includes a heading chart [animal] A, [plant] P, [geography] for each item of a large category as the top menu of the [encyclopedia (picture book)] 22b4. A specific example is shown in which a large classification display screen GD in which [Map] T, [Person / Event] H, [Tool / Equipment] E, [Life / Fashion / Entertainment] L is arranged is displayed.

  FIG. 3 is a diagram showing a data structure of [encyclopedia (picture book)] 22b4 stored in the dictionary database 22b of the electronic dictionary device 10. As shown in FIG.

  There are seven categories ([Animals] [Plants] [Geography / Maps] [People / Incidents] [Tools / Equipment] [Life / Fashion / Entertainment] [Science / Architecture / Design]] Each item of the middle class is associated as a second hierarchy for each item of the same large class. And each data which belongs to the said classification for each item of this middle classification is matched as the 3rd hierarchy.

  The electronic dictionary device 10 configured as described above is a program for the CPU 21 to execute the information display control program 22a (the headword search process, category search process, explanation information read display process, data structure list display process, etc.). The functions described in the following description of the operation are realized by controlling the operation of each part of the circuit in accordance with the instructions described in (1) and by operating the software and hardware in cooperation.

  Next, the operation of the electronic dictionary device 10 configured as described above will be described.

  FIG. 4 is a flowchart showing a category search process executed in accordance with the information display control program 22a of the electronic dictionary device 10.

  FIG. 5 is a diagram showing a search display operation of [encyclopedia (picture book)] 22b4 accompanying the category search process of the electronic dictionary device 10.

  When, for example, [encyclopedia (picture book)] 22b is designated in response to a user operation of the dictionary designation key 14b and the category search process in FIG. 4 is started, as shown in FIG. On the other hand, as the top menu, the heading chart of each of the major categories [animal] A, [plant] P, [geography / map] T, [person / incident] H, [tool / equipment] E, [life, customs, Entertainment] A large classification display screen GD in which L,... Are arranged is displayed (step S1).

  When any item (for example, [animal] A) is touched and selected on the large classification display screen GD (step S2), as shown in FIG. 5B, the selected item [animal] A is selected. The middle classification display screen [Animal] GA in which the headings [mammals] Aa, [birds] Ab, [fishes] Ac, [insects] Ad, and [others] Ae are arranged in the main classification section 17 Is displayed (step S3).

  Then, with respect to the soft icon portion 17A of the main display portion 17 on which the middle category display screen [animal] GA is displayed, the top icon [Top] To associated with the top category large category display screen GD and the selection are selected. A large classification icon [motion] An corresponding to the selected large classification item [animal] A is displayed (step S4).

  When any item (for example, [Fish] Ac) is touched and selected on the middle classification display screen [Animal] GA (Step S5 (Yes)), as shown in FIG. Fishes in which the heading chart [Ainame] Ac1, [Madai] Ac2, [Stingray] Ac3, [Akamut] Ac4, [Aji] Ac5, [Kamasu] Ac6,... Of each item belonging to the selected item [Fish] Ac The display screen GAc is displayed on the main display unit 17 (step S6).

  Then, the middle classification icon [fish] Fi corresponding to the selected middle classification item [fish] Ac is added to the soft icon section 17A of the main display section 17 on which the fish display screen GAc is displayed. It is displayed (step S7).

  When any item (for example, [Aji] Ac5) is touched and selected on the fish display screen GAc (step S8 (Yes)), the selected item is displayed as shown in FIG. 5D. [Aji] An explanation information display screen [Aji] GAc5 describing the image of Ac5 and its explanation Ac5 ′ is displayed on the main display portion 17 (step S9).

  Subsequently, the top icon [Top] To displayed on the soft icon portion 17A of the explanation information display screen [Aji] GAc5 (or the fish display screen GAc shown in FIG. 5C) is touched. When selected (step S11 (Yes)), as shown in FIG. 5A, the main display unit 17 returns to the display of the large classification display screen GD as the top menu (step S12).

  Further, in the explanation information display screen [Aji] GAc5 (or the fish display screen GAc shown in FIG. 5C) shown in FIG. 5D, the large classification icon [ Movement] When An is touched and selected (step S13 (Yes)), as shown in FIG. 5B, the main display unit 17 displays the item [animal] A selected from the large classification. The display returns to the display of the belonging middle classification display screen [animal] GA (step S14).

  Further, in the explanation information display screen [Aji] GAc5 shown in FIG. 5D (or the fish display screen GAc shown in FIG. 5C), the middle classification icon [ When [Fish] Fi is touched and selected (step S15 (Yes)), as shown in FIG. 5E, the main display unit 17 displays the next middle class [insect] after the selected middle class [Fish]. ] Is displayed on the insect display screen GAd in which the heading charts [Aeophididae] Ad1, [Aeostagea] Ad2, [Aodiakamikiri] Ad3, [Amatsumushi] Ad4, [Akaekaeka] Ad5, [Akatateha] Ad6,. (Step S16).

  Then, the middle classification icon [Fish] Fi displayed on the soft icon portion 17A is changed to the middle classification icon [Kon] In corresponding to the middle classification [Insect] that has transitioned this time (Step S17).

  On the other hand, when the top icon [Top] To displayed on the soft icon portion 17A of the middle classification display screen [Animal] GA shown in FIG. 5B is touched and selected (step S18 (Yes)). As shown in FIG. 5A, the main display unit 17 returns to the display of the large classification display screen GD as the top menu (step S19).

  Further, in the middle classification display screen [animal] GA shown in FIG. 5B, when the large classification icon [motion] An displayed on the soft icon portion 17A is touched and selected (step S20 (Yes) )), As shown in FIG. 5 (F), the main display unit 17 displays a heading chart [flowers] Pa, [Takagi] of each item belonging to the next major category [plant] of the selected major category [animal]. Transition is made to the display of the medium classification display screen [plant] GP in which Pb, [shrub] Pc, [others] Pd are arranged (step S21).

  Then, the large classification icon [moving] An displayed in the soft icon portion 17A is changed to the large classification icon [planting] Pl corresponding to the large classification [plant] that has transitioned this time (step S22).

  When the [encyclopedia (picture book)] 22b having the categorized hierarchical structure of dictionary data is designated as a search target, as shown in FIG. 1, the data structure list GB of the dictionary data is shown. Is displayed on the sub display unit 16, and the entire hierarchical structure can be easily confirmed by touching the scroll key Cu.

  In the data structure list GB displayed on the sub display unit 16, when a category item at an arbitrary level is touched and selected, the main display unit 17 directly displays the display screen corresponding to the selected category. Transition.

  Specifically, for example, in the data structure list GB of [Encyclopedia (Picture)] 22b displayed on the sub display unit 16 in FIG. 1, [Insect] belonging to the middle class of the second hierarchy is touched and selected. Then, the main display unit 17 immediately shifts to the display of the insect display screen GAd in which the heading chart [A. beetle] Ad1 to [Akatateha] Ad6... Of each item belonging to the selected middle class [insect] is arranged (FIG. 5 (E)).

  Also in this case, in the soft icon portion 17A, the middle classification icon [Kon] In corresponding to the middle classification [insect] transitioned this time is added or changed and displayed.

  Therefore, according to the category search function for the hierarchically classified dictionary data in the electronic dictionary device 10 having the above configuration, the large classification item [animal] A displayed on the large classification display screen GD of the top menu is selected. Then, the middle classification display screen [animal] GA belonging to the selected major classification is displayed, and the top icon [Top] To and the selected major classification [animal] icon [motion] An are displayed. Is done. Subsequently, when the intermediate classification item [fish] Ac is selected from the intermediate classification display screen [animal] GA, the fish display screen GAc belonging to the selected intermediate classification is displayed, and the selected intermediate classification [fish] The icon [fish] Fi is added and displayed. When the top icon [Top] To is touched, the display returns to the large classification display screen GD, and when the large classification icon [Motion] An is touched, the medium classification display screen [Animal] GA is displayed. Returning and touching the middle category icon [Fish] Fi, the insect display screen GAd belonging to the middle category [Insect] next to the corresponding middle category [Fish] is displayed.

  For this reason, the user can confirm at a glance to which level the classification display screen currently displayed belongs to by displaying the icons To, An, and Fi. In addition, after tracing and displaying data from the first hierarchical level classification item to the second hierarchical level classification item and the third hierarchical level item, directly returning to the first hierarchical classification display screen GD, You can return to the middle category display screen GA of the hierarchy, or transition to and display the corresponding category display screen belonging to another middle category, and transition to other categories in the same hierarchy one after another. The operation can be performed very easily.

  In addition, according to the category search function for the hierarchically classified dictionary data in the electronic dictionary device 10 having the above configuration, the data structure list GB of the dictionary data is displayed on the sub display unit 16, and the data structure When a category item at an arbitrary level is touched and selected on the list GB, the main display unit 17 directly transitions to a display screen corresponding to the selected category.

  For this reason, a direct dictionary search over the entire hierarchical structure of the dictionary data is possible, and the search operability can be greatly improved.

  Note that each processing technique and database by the electronic dictionary device 10 described in each of the above embodiments, that is, each technique such as the category search process shown in the flowchart of FIG. 4 and the dictionary database 22b are all executed by a computer. Can be stored in an external recording medium 23 such as a memory card (ROM card, RAM card, etc.), magnetic disk (floppy disk, hard disk, etc.), optical disk (CD-ROM, DVD, etc.), semiconductor memory, etc. can do. Then, the computer reads the program stored in the external recording medium 23 into the storage device 22, and the operation is controlled by the read program, whereby the categorized hierarchical structure dictionary described in each of the above embodiments. A category search function for data can be realized, and the same processing by the above-described method can be executed.

  Further, the program data for realizing each of the above methods can be transmitted on the network N in the form of a program code, and the program data is taken into the computer connected to the network N by the communication unit 25. The category search function for the above-described category-structured hierarchical dictionary data can also be realized.

  Note that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention at the stage of implementation. Further, each of the embodiments includes inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in each embodiment or some constituent elements are combined in different forms, the problems described in the column of the problem to be solved by the invention If the effects described in the column “Effects of the Invention” can be obtained, a configuration in which these constituent requirements are deleted or combined can be extracted as an invention.

  The invention described in the scope of the claims of the original application is appended below.

[1]
Storage means for storing data classified for each hierarchy;
Data for retrieving data by selecting the same item while displaying the classification item of the hierarchy from the upper hierarchy to the lower hierarchy on the display unit according to the user's operation. Search means;
In addition to the icon indicating the highest hierarchy, each time a classification item of each hierarchy is selected by the data search means, an icon display means for displaying an icon indicating the classification of the selected item on the display unit;
Top classification return control for returning the display of the display unit to the display of the classification item of the highest hierarchy when the icon indicating the highest hierarchy displayed by the icon display means is designated in response to a user operation Means,
In response to a user operation, when an icon displayed by the icon display means indicating a classification higher than the classification to which the item currently displayed on the display section belongs is specified, the same display on the display section is specified. Classification return control means for returning to the display of items belonging to the classification indicated by the icon,
In response to a user operation, when an icon displayed by the icon display means indicating a classification to which the item currently displayed on the display unit belongs, the display of the display unit is indicated by the specified icon. Classification transition control means for transitioning to display of items belonging to another classification in the same hierarchy as the classification,
An information display device comprising:

[2]
When the display of the display unit is changed to display of an item belonging to another category by the category transition control unit, an icon changing unit is provided that changes the designated icon to an icon indicating the other category. [1] The information display device according to [1].

[3]
The display unit is a main display unit,
Data structure display means for displaying a list of hierarchical structures of data stored in the storage means on a sub display unit;
In the hierarchical structure of the data displayed by the data structure display means, when an item in an arbitrary hierarchy is selected in response to a user operation, items belonging to the selected item classification are displayed on the main display unit. Display control means;
The information display device according to [1] or [2], comprising:

[4]
A program for controlling a computer of an electronic device having a display unit,
The computer,
Storage means for storing data classified for each hierarchy in a storage unit;
Data for retrieving data by selecting the same item while displaying the classification item of the hierarchy from the upper hierarchy to the lower hierarchy on the display unit according to the user's operation. Search means,
In addition to the icon indicating the highest hierarchy, each time the classification item of each hierarchy is selected by the data search means, icon display means for displaying an icon indicating the classification of the selected item on the display unit,
Top classification return control for returning the display of the display unit to the display of the classification item of the highest hierarchy when the icon indicating the highest hierarchy displayed by the icon display means is designated in response to a user operation means,
In response to a user operation, when an icon displayed by the icon display means indicating a classification higher than the classification to which the item currently displayed on the display section belongs is specified, the same display on the display section is specified. Classification return control means for returning to the display of the items belonging to the classification indicated by the icon,
In response to a user operation, when an icon displayed by the icon display means indicating a classification to which the item currently displayed on the display unit belongs, the display of the display unit is indicated by the specified icon. Classification transition control means for transitioning to the display of items belonging to another classification in the same hierarchy as the classification,
Program to function as.

DESCRIPTION OF SYMBOLS 10 ... Electronic dictionary apparatus 11 ... Main body case 12 ... Cover body case 13 ... Hinge part 14 ... Key input part (keyboard)
14a ... Character input key 14b ... Dictionary designation key 14c ... [Translation / Determination] key 14d ... [Back / List] key 14e ... Cursor key 15 ... Speaker 16 ... Sub display unit 16d ... Color liquid crystal display unit 16t ... Transparent touch panel 17 ... Main display portion 17d ... Color liquid crystal display portion 17t ... Transparent touch panel 17A ... Soft icon portion To ... Top icon [Top]
An ... Large classification icon [animal]
Pl ... Large classification icon [plant]
Fi ... Medium classification icon [Fish]
In ... Medium classification icon [Insect]
21 ... CPU
22 ... Storage device 22a ... Various information display control program 22b ... Dictionary database 22b4 ... [Encyclopedia (picture book)]
23 ... External recording medium 24 ... Recording medium reading unit 25 ... Communication unit GD ... Large classification display screen GA ... Medium classification display screen [animal]
GP ... Medium classification display screen [plant]
GAc ... Fish display screen GAd ... Insect display screen GAc5 ... Explanation information display screen [Aji]
GB ... Data structure list

Claims (4)

Data search that searches data by selecting the same item while displaying the classification item of the hierarchy from the upper hierarchy to the lower hierarchy for each hierarchy according to the user operation. Means,
Icon display means for displaying on the display unit an icon indicating the classification of the selected item each time a classification item of each hierarchy is selected by the data search means;
In response to a user operation, when an icon displayed by the icon display means indicating a classification higher than the classification to which the item currently displayed on the display section belongs is specified, the same display on the display section is specified. Classification return control means for returning to the display of items belonging to the classification indicated by the icon,
In response to a user operation, when an icon displayed by the icon display means indicating a classification to which the item currently displayed on the display unit belongs, the display of the display unit is indicated by the specified icon. Classification transition control means for transitioning to display of items belonging to another classification in the same hierarchy as the classification,
An information display device comprising:   When the display of the display unit is changed to display of an item belonging to another category by the category transition control unit, an icon changing unit is provided that changes the designated icon to an icon indicating the other category. The information display device according to claim 1.   The information display device according to claim 1, wherein the display unit is a display unit with a touch panel. A program for controlling a computer of an electronic device having a display unit,
The computer,
Data search that searches data by selecting the same item while displaying the classification item of the hierarchy from the upper hierarchy to the lower hierarchy for each hierarchy according to the user operation. means,
Icon display means for displaying an icon indicating the classification of the selected item on the display unit each time the classification item of each hierarchy is selected by the data search means;
In response to a user operation, when an icon displayed by the icon display means indicating a classification higher than the classification to which the item currently displayed on the display section belongs is specified, the same display on the display section is specified. Classification return control means for returning to the display of the items belonging to the classification indicated by the icon,
In response to a user operation, when an icon displayed by the icon display means indicating a classification to which the item currently displayed on the display unit belongs, the display of the display unit is indicated by the specified icon. Classification transition control means for transitioning to the display of items belonging to another classification in the same hierarchy as the classification,
Program to function as.

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