Patent Publication Number: US-2009228203-A1

Title: Destination selection support device, methods, and programs

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The disclosure of Japanese Patent Application No. 2008-056906 filed on Mar. 6, 2008, including the specification, drawings, and abstract is incorporated herein by reference in its entirety. 
     BACKGROUND OF THE INVENTION 
     1. Related Technical Fields 
     Related technical fields include, for example, destination selection support devices and destination selection support programs for setting a destination in a navigation device. 
     2. Related Art 
     In recent years, the guidance of vehicles by navigation devices has become increasingly common. A navigation device has a function that searches for a route from a departure point to a destination, a function that detects a vehicle&#39;s position using the Global Positioning System (GPS) satellites and a sensor such as a gyroscope or the like, a function that displays the vehicle&#39;s current position and the route to the destination on a map, and the like. 
     Generally, a destination is input when a navigation device searches for a route, searches for facilities in the vicinity of the current position, confirms information, and the like. In the destination input procedure, destination candidates that correspond to the characters that are input are found within a destination data file, and the destination candidates are displayed. The input is completed when one of the displayed destination candidates is selected. 
     Various types of proposals are known to have been made for efficiently performing the destination input. For example, in a case where a search term matches the name of a chain store, a large number of individual destination candidates are found that begin with the same name, such as “Eito-Irebun XY Store.” This can create a problem because the display screen, which has a limited display area, is filled up with chain store names and, thus, the desired destination can be difficult to find. 
     A technology is proposed in Japanese Patent Application Publication No. JP-A-2005-037127 to address this problem. In a case where the destination is a chain store, the technology groups the chain stores under a representative name and displays only the representative name, thus preventing the display screen from being filled up by the names of the individual chain stores. An example of a candidate display screen  60  that uses this technology is illustrated in  FIG. 9A . On the candidate display screen  60 , search results are displayed as destination candidates in search results display spaces  66 , but the results for the chain stores are displayed by a group display under the representative name, and the number of candidates is displayed in a comment space  68 . In the example in  FIG. 9A , the destination candidates that are stores of the Eito-Irebun chain are displayed under the representative name “Eito-Irebun”, and the number of the candidates is displayed as “ 3081 .” 
     Displaying the chain stores by a group display in this manner prevents the search results display spaces  66  from being filled up by the names of the individual chain stores and makes it possible to display the names of other candidates such as “Parlor  8 ”, “Eito”, and the like. If the representative name is selected in the search results display spaces  66 , then the names of the individual chain stores are displayed as the destination candidates. For example, in  FIG. 9A , if the “Eito-Irebun” display space is selected by touch or the like, the names of the individual stores in the Eito-Irebun chain, such as “Eito-Irebun Yotsuya 2-Chome Store” and the like, are displayed as the destination candidates, as shown in  FIG. 9B . 
     SUMMARY 
     The above-described technology has at least the following problems. First, if a user wants to go to a specific chain store, the user must first select the representative name, which increases the number of operations. Moreover, when many chain stores are displayed, the user must find the desired chain store buried among the large number of the stores that are displayed. For example, if the user wants to set “Eito-Irebun Yotsuya 2-Chome Store” as the destination, then the user must first select the representative name “Eito-Irebun”, then search for “Eito-Irebun Yotsuya 2-Chome Store” among the individual store names that are displayed, and finally set the destination. 
     Various implementations of the broad principles described herein provided enable a user to select a desired destination more efficiently. 
     Various exemplary implementations provide devices, methods, and programs that store a plurality of destination candidates and a plurality of destination candidate groups, input a search term that is used to search for destination candidates, and search among stored destination candidates for those that correspond to the search term. The devices, methods, and programs may display, for example, the destination candidates as a group when they belong to a destination candidate group, the destination candidates individually when they do not belong to a destination candidate group; and the destination candidates individually when they belong to a destination candidate group and satisfy a specified condition. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a system configuration diagram of an exemplary navigation device; 
         FIG. 2  illustrates an exemplary destination data file; 
         FIG. 3  illustrates an exemplary character input screen; 
         FIG. 4  illustrates an exemplary candidate display screen; 
         FIG. 5  illustrates an exemplary display on the candidate display screen; 
         FIG. 6  illustrates an exemplary modified candidate display screen; 
         FIG. 7  illustrates an exemplary destination candidate display procedure; 
         FIG. 8  illustrates an exemplary modified destination candidate display procedure; and 
         FIG. 9  illustrates a known example. 
     
    
    
     DETAILED DESCRIPTION OF EXEMPLARY IMPLEMENTATIONS 
     Hereinafter, an exemplary destination selection support device will be described in detail. Such a device is usable in a navigation device that displays destination candidates that are chain stores by a group display on a candidate display screen  60  ( FIG. 4 ). However, in the case of a destination candidate that satisfies a specified extraction condition, such as being within a specified distance from the position of the vehicle, being closest to the position of the vehicle, or the like, the destination candidate is displayed separately in an ordinary manner, even if it would otherwise be displayed by a group display under a representative name. For example, in  FIG. 4 , stores that are affiliates of an Eito-Irebun chain are displayed as a group display in a group display  91  that says “Eito-Irebun”. However, an Eito-Irebun Kinuta Store, which is an Eito-Irebun affiliate that satisfies a specified condition, is displayed by an ordinary display  92 . Thus, the navigation device displays the chain stores as a group entry, but also individually displays the stores that satisfy a specified extraction condition. Therefore, the navigation device can omit superfluous operations. Even in the case of a search for destination candidates that are not chain stores, the search can be simplified because the number of candidates listed does not become inordinately large. 
       FIG. 1  is a system configuration diagram of an exemplary navigation device  1  that uses a destination input device and a destination input program. The navigation device  1  is installed in a vehicle and, as shown in  FIG. 1 , includes a current position detection device  10 , a controller (e.g. an information processing control device  20 ), input-output devices  40 , and an information storage device  50 . An example of each of these devices is described below. 
     A configuration of the current position detection device  10 , which functions as a current position acquisition unit is described below. The current position detection device  20  includes, for example, an absolute heading sensor  11 , a relative heading sensor  12 , a distance sensor  13 , a GPS receiving device  14 , a beacon receiving device  15 , and a data transmitting receiving device  16 . 
     The absolute heading sensor  11  is a geomagnetic sensor that detects the direction in which the vehicle is facing, by using a magnet to detect the direction north, for example. The absolute heading sensor  11  may be any unit that detects an absolute heading. 
     The relative heading sensor  12  is a sensor that detects, for example, whether or not the vehicle has turned at an intersection. It may be an optical rotation sensor that is attached to a rotating portion of the steering wheel, a rotating type of resistance volume, or an angle sensor that is attached to a wheel portion of the vehicle. For example, a gyroscopic sensor that utilizes angular velocity to detect a change in an angle may also be used. In other words, the relative heading sensor  12  may be any unit that can detect an angle that changes in relation to a reference angle (the absolute heading). 
     The distance sensor  13  may be, for example, a unit that detects and measures a rotation of a wheel or a unit that detects an acceleration and derives its second integral. In other words, the distance sensor  13  may be any unit that can measure a distance that the vehicle moves. 
     The GPS receiving device  14  is a device that receives a signal from a man-made satellite. It can acquire various types of information, such as a signal transmission time, information on the position of the receiving device  14 , a movement velocity of the receiving device  14 , a direction of movement of the receiving device  14 , and the like. 
     The beacon receiving device  15  is a device that receives a signal that is transmitted from a transmission device that is installed at a specific location. Specifically, the beacon receiving device  15  can obtain information that pertains to the vehicle&#39;s operation, such as VICS information, information on traffic congestion, information on the vehicle&#39;s current position, parking information, and the like. 
     The data transmitting-receiving device  16  is a device that utilizes a telephone circuit or radio waves to perform communication and exchange information with other devices outside the vehicle. For example, the data transmitting-receiving device  16  may be used in a variety of ways, such as for a car telephone, ATIS, VICS, GPS route correction, inter-vehicle communication, and the like, and is capable of inputting and outputting information that relates to the operation of the vehicle. 
     The information processing control device  20  and its configuration is described below. The information processing control device  20  performs calculations and control based on information that is input from the current position detection device  10  and the input-output devices  40 , as well as on information that is stored in the information storage device  50 . The information processing control device  20  is also a unit that performs control such that calculation results are output to an output unit such as a display  42 , a printer  43 , a speaker  44 , or the like. 
     The controller (e.g. the information processing control device  20 ) includes, for example, a central processing unit (CPU)  21 , a first ROM  22 , a sensor input interface  23 , a RAM  24 , a communication interface  25 , and a second ROM  26 . 
     The CPU  21  performs overall calculations and control for the entire navigation device  1 . 
     The first ROM  22  stores programs that are related to navigation, specifically navigation programs that are related to a destination input process that uses a group display of chain stores according to the present embodiment, to current position detection, to route searching, to displayed guidance, and the like. 
     The sensor input interface  23  is a unit that receives an input from the current position detection device  10 . 
     The RAM  24  stores information that a user inputs, such as an input from an input device  41  that is described later, as well as destination information, information on a point that the vehicle passes, and the like. The RAM  24  is also a storage unit for storing the results of calculations that the CPU  21  makes based on the information that is input by the user, route search results, and map information that is read in from the information storage device  50 . Furthermore, the destination names, the representative names for the chain stores, and the like are stored as destination candidates in the RAM  24 . 
     The communication interface  25  is a unit that inputs and outputs information from the current position detection device  10 , particularly information that is acquired from outside the vehicle. 
     The second ROM  26  stores programs that are related to navigation, specifically a navigation program that is related to voice guidance. The image processor  27  is a processing unit that takes vector information that is processed by the CPU  21  and processes it into image information. The clock  28  keeps time. The image memory  29  is a unit that stores the image information that the image processor  27  processes. The audio processor  30  processes audio information that is read in from the information storage device  50  and outputs it to the speaker  44 . 
     The input-output devices  40  include, for example, an input device  41 , a display  42 , a printer  43 , and a speaker  44 . The user uses the input device  41  to input data such as a destination, a point that the vehicle passes, a search condition, and the like. The display  42  displays an image. The printer  43  prints information. The speaker  44  outputs the audio information. The input device  41  may be a touch panel that is provided on the face of the display  42 , a touch switch, a joystick, a key switch, or the like. 
     A map of the area around the current position, various types of operation screens, and a driving route to the destination are displayed on the display  42 . Also displayed on the display  42  are operation screens, such as a character input screen for inputting the search characters that are used in the destination input process according to the present embodiment, a candidate display screen that displays a list of search candidates (destination candidates), and the like. Touching a position that corresponds to an item or the like that is displayed on an operation screen causes the item in the touched position to be input from the touch panel that is provided on the screen of the display  42 . 
     The information storage device  50  is connected to the information processing control device  20  through a transmission route  45 . The information storage device  50  stores, for example, a map data file  51 , an intersection data file  52 , a node data file  53 , a road data file  54 , a photographic data file  55 , a destination data file  56 , a guidance point data file  57 , and an other data file  59 . The information storage device  50  is generally configured from an optical storage medium such as a DVD-ROM or a CD-ROM, or from a magnetic storage medium such as a hard disk or the like, but it may also be configured from any one of various types of storage media, such as a magneto optical disk, a semiconductor memory, or the like. 
     The map data file  51  stores map data such as a national road map, road maps of various regions, residential maps, and the like. The road maps include various types of roads, such as main arterial roads, expressways, secondary roads, and the like, as well as terrestrial landmarks (facilities and the like). The residential maps include graphics that show the shapes of terrestrial structures and the like, as well as street maps that indicate street names and the like. The secondary roads are comparatively narrow roads with rights of way that are narrower than the prescribed values for national routes and prefectural routes. They include roads for which traffic restriction information is not added, such as “one-way” and the like. 
     The intersection data file  52  stores data that is related to intersections, such as geographical coordinates for the locations of intersections, intersection names, and the like. 
     The node data file  53  stores geographical coordinate data and the like for each node that is used for route searching on the map. 
     The road data file  54  stores data that is related to roads, such as the locations of roads, the types of roads, the number of lanes, the connection relationships between individual roads, and the like. 
     The photographic data file  55  stores image data of photographs taken of locations that require visual display, such as various types of facilities, tourist areas, major intersections, and the like. 
     The guidance point data file  57  stores guidance data on geographical points where guidance is required, such as the content of a guidance display sign that is installed on a road, guidance for a branching point, and the like. 
     The destination data file  56  stores the destination data for use in the destination searches, such as data on major tourist areas, buildings, facilities, locations such as companies, sales offices, and the like that are listed in telephone directories and that can be selected as destinations, and the like. The destination data includes search keys (phonetic representations of names) and information on facilities. The information on the facilities includes names, coordinates, telephone numbers, additional information, and the like. The coordinates are x and y coordinates that are derived from the latitudes and longitudes of the destinations. The additional information is detailed data that is related to the destinations. For facilities that are chain stores, the destination data includes data that links the facilities with one another and groups them, and also includes a representative name for the group. 
       FIG. 2  illustrates an example of a logical structure of the destination data file  56 . The destination data file  56  specifies each of the destination candidates in terms of, for example, a location name, a search key, coordinates, a telephone number, grouping information, keywords, and the like. 
     The location name is a character string that describes the destination candidate and is used in displaying the search results on the candidate display screen  60 , which is described later. The search key is the phonetic representation of the location name. 
     Note that there are two methods for setting a search term in the navigation device  1 . The first method is character input, where the user sets the search term by inputting characters directly. The second method is keyword input, where the user sets the search term by selecting a keyword that has been prepared in advance. In a case where the search term is input as characters, the search is conducted for a character string that corresponds to the search key. The search operates such that it finds names that start with a character string that matches the search key. However, the search may also operate such that, for example, the search term “su-pa-e-i-to” is divided into the segments “su-pa-” and “e-i-to”, which are then stored in memory. Any name that matches one of the segments, such as “e-i-to”, for example, is treated as a match for the search term “su-pa-e-i-to”. 
     The coordinates are coordinate values for the location, such as the latitude and the longitude or the like. The telephone number is the telephone number of the facility at the location. The navigation device  1  can calculate the distance from the vehicle to the destination candidate based on the coordinates of the current position and the coordinates in the destination data. 
     The grouping information is information for grouping the destination candidates. It is defined in the form of the phonetic representation of the representative name for the destination candidates. The grouping information is used such that the names that are grouped are, for example, those that start with a character string that matches the phonetic representation that is input as the search term. For example, if the phonetic representation “e-i-to” is input, it matches the grouping information “e-i-to-i-re-bu-n”. For example, the destination candidates “Eito-Irebun Kinuta Store”, “Eito-Irebun Shibuya Store” and the like are grouped by the phonetic representation of the representative name “e-i-to-i-re-bu-n” in the grouping information. Thus the destination data file  56  functions as a destination candidate storage unit that stores a plurality of destination candidates, including the destination candidates that are grouped. A character string that is displayed as a search result that corresponds to the grouping information is also stored in association with the grouping information in the destination data file  56 , although it is not shown in  FIG. 2 . For example, “Eito-Irebun” is stored as a character string to be displayed for the grouping information “e-i-to-i-re-bu-n”, and “Eito-Irebun” is displayed as the display for the group. 
     The keywords are keywords that are set for the location name. The keywords are set for the three attributes of name, address, and genre. For example, the user can search for destinations by genre by selecting a genre and the associated keywords. Note that in  FIG. 2 , the keywords for the name are shown, but the keywords that pertain to the address and the genre have been omitted. 
     Next, an exemplary destination input process will be explained.  FIG. 3  illustrates an exemplary character input screen that is displayed on the display  42  during the destination input process. As explained above, the touch panel that serves as the input device  41  is provided on the face of the display  42 . When the user touches a button that is displayed on the display  42 , information that corresponds to the touched button is input to the navigation device  1 . A fixed frame of the input device  41  is provided around the outer edge of the display  42 , although it is not shown in the drawings. A destination setting button and a map button are provided in the form of pushbuttons (hardware keys) that physically exist in an upper area of the fixed frame. The map button is used to display a map of the area around the current position. 
     When the destination setting button is selected, the information processing control device  20  starts the destination input process and displays the character input screen that is illustrated in  FIG. 3  on the display  42 . Note that the destination that is set by the destination input process is used for the route search and is also used when the selected destination and the candidate destinations in the vicinity of the current position are displayed on the map screen. 
     As illustrated in  FIG. 3 , the character input screen includes a character input space  81 , a number of candidates space  82 , a Modify button  83 , a Return button  84 , an input keyboard  85 , and an End button  86 . The character input space  81  is a space that displays characters that are input as a search key in the order in which they are input. The input keyboard  85  includes character buttons for inputting the characters of the Japanese syllabary. A numeric keypad and a function key may also be displayed. The number of candidates space  82  displays the number of candidate locations (the destination data items) that are found by using the characters that are displayed in the character input space  81  as the search key. The Modify button  83  is used to change the characters that are displayed in the character input space  81  after the input is complete. The Return button  84  is a button for returning to the state prior to the last operation. The End button  86  is a button for indicating the end of the input of the search key. When the End button  86  is selected, the display on the display  42  changes to the candidate display screen  60 , which is illustrated in  FIG. 4 . 
     When the user performs the character input on the character input screen by touching in order the characters on the input keyboard  85  that correspond to the intended search key, the information processing control device  20  displays the characters that have been input in order in the character input space  81 . The information processing control device  20 , using the characters that have been input as the search key, takes the destination data items that have been found and stores them in the RAM  24 . In other words, the information processing control device  20  displays in the character input space  81  the characters that the user touches on the input keyboard  85  in order. The information processing control device  20  also selects from the destination data file  56  the location names whose search keys match the characters that are displayed in the character input space  81  as the destination candidates. 
     The navigation device  1  repeats the process of selecting the location names every time the user changes the characters that are input in the character input space  81 . For example, if the user inputs the character “e” from the input keyboard  85 , the information processing control device  20  displays the character “e” that was input in the character input space  81 . The information processing control device  20  then refers to the search key “e” in the destination data file  56 , selects in order the location names that have “e” as the first character in their search keys, and stores those location names as the destination candidates. If the character “i” is then input from the input keyboard  85 , the information processing control device  20  changes the display in the character input space  81  from “e” to “e-i”, the characters that have been input. The information processing control device  20  then selects from among the destination candidates it has already selected the location names that have “e-i” as the first two characters in their search keys. Thereafter, the information processing control device  20  continues to narrow down the destination candidates in the same manner according to the characters that are displayed in the character input space  81 . When the End button  86  on the character input screen is touched, the information processing control device  20  shifts the display on the display  42  to the candidate display screen  60  and displays a list of the destination candidates that is narrowed down according to the area and the genre. 
       FIG. 4  illustrates an exemplary candidate display screen  60 . In  FIG. 4 , the candidate display screen  60  displays a search key space  61 , an area input space  62 , a Modify Genre button  63 , a genre input space  64 , a total number of candidates space  65 , search results display spaces  66 , detail display buttons  67 , comment spaces  68 , a Return button  69 , a scroll bar  71 , a Modify Search Key button  72 , a Modify Area button  73 , a Previous button  74 , a Page Up button  75 , a Page Down button  76 , and a Next button  77 . 
     The search key space  61  is a space that displays the search key for the performed search. The characters that were input in the character input space  81  at the point in time when the End button  86  was selected on the character input screen shown in  FIG. 3 , that is, the characters that were displayed in the character input space  81 , are displayed as the search key. 
     The Modify Search Key button  72  is a button that is touched to modify the characters that are displayed in the search key space  61 . When the Modify Search Key button  72  is touched, the display returns to the character input screen, and it becomes possible to modify the characters that are displayed in the search key space  61 . 
     The area input space  62  is a space for setting a search area within which the search for the destination data will be performed. For example, the area may be set to “All areas” to define the entire country as the search area, and the area may also be set to a smaller area, such as “Osaka Prefecture”, Aichi Prefecture”, “Tokyo Metropolitan”, or the like. A search area setting menu is provided as a part of the destination input process, although it is not shown in the drawings. The user can therefore select the desired search area. The navigation device  1  uses the destination data for the area that is set in the area input space  62  and narrows down the destination candidates in the area according to the search key. 
     The Modify Area button  73  is a button that is touched to modify the search area that is set in the area input space  62 . When the Modify Area button  73  is touched, it becomes possible to modify the search area that is set in the area input space  62 . After the search area is modified, a search of the modified area is performed using the search key that is displayed in the search key space  61 . 
     The genre input space  64  is a space for setting a genre within which the search for the destination data will be performed. For example, the genre may be set to “all genres”, “leisure”, “restaurants”, “hotels”, or the like. A genre setting menu is provided as a part of the destination input process, although it is not shown in the drawings. The user can therefore select the desired genre. The navigation device  1  uses the destination data for the genre that is set in the genre input space  64  and narrows down the destination candidates in the genre according to the search key. 
     The Modify Genre button  63  is a button that is touched to modify the genre that is set in the genre input space  64 . When the Modify Genre button  63  is touched, it becomes possible to modify the genre that is set in the genre input space  64 . After the genre is modified, a search of the modified genre is performed using the search key that is displayed in the search key space  61 . 
     By using the search area and the genre as described above to narrow down the destination data that is the object of the search, the navigation device  1  reduces the amount of the search processing. 
     The total number of candidates space  65  displays the total number of the destination candidates that have been selected. The total number of the destination candidates is the sum of the number of the destination candidates that were selected by an ordinary search and the number of the destination candidates that were selected by a fuzzy search. Note that the numbers of the destination candidates that were selected by each of the searches may also be displayed separately. 
     The search results display spaces  66  are spaces for displaying the names of the selected destination candidates in list form. There are two methods for displaying the destination candidates in the search results display spaces  66 . The first method is an ordinary display that displays individual destination candidates, while the second method is a group display that displays a group of destination candidates as a group under a representative name. As a rule, the navigation device  1  uses the ordinary display for the destination candidates that are not grouped by the group information in the destination data file  56 , and uses the group display under the representative name for the destination candidates that are grouped. However, for a grouped destination candidate that satisfies a specified extraction condition, the navigation device  1  selects the destination candidate from the group and displays it separately using the ordinary display. 
     The extraction condition may be, for example, that the destination candidate is located within a specified distance (for example, two kilometers) from the current position of the vehicle, that the destination candidate is the closest to the current position, or that the destination candidate is the closest in the direction that the vehicle is heading. The extraction condition can also be varied dynamically according to the geographical distribution of the destination candidates that belong to a given genre or group, or according to the number of the selected candidates. Thus, a destination candidate that is a chain store can be displayed as a group under a representative name, but if the destination candidate is located within a specified distance from the current position, for example, it can be displayed separately using the ordinary display, even though it is a store that is included in a given group. In the example in  FIG. 4 , the Eito-Irebun chain stores are displayed by the group display  91  in the search results display spaces  66 . However, the Eito-Irebun Kinuta Store, which is one of the Eito-Irebun stores, is displayed by the ordinary display  92 , because it satisfies an extraction condition. 
     If a destination candidate that is displayed by the ordinary display in the search results display spaces  66  is selected (touched), the destination data for the selected destination candidate is input, and the selected destination candidate is established as the destination. On the other hand, if a group display is touched, then the individual destination candidates in the group are displayed by ordinary displays in the search results display spaces  66 , as shown in  FIG. 5 , which is described later. Then, if one of the ordinary displays is touched, then the destination data for the selected destination candidate is input, and the selected destination candidate is established as the destination. Note that after the group display is touched, the destination candidates that were displayed by the ordinary displays in the search results display spaces  66  are no longer displayed. In other words, when the group display “Eito-Irebun” is touched, the chain stores that belong to Eito-Irebun are displayed by the ordinary displays, except for the Eito-Irebun Kinuta Store, which was previously displayed. 
     One of the detail display buttons  67  is displayed for each of the destination candidates. When the user touches the detail display button  67  for the desired destination candidate, the navigation device  1  searches the destination data file  56  for the facilities information that is associated with the selected destination candidate and displays the facilities information on the display  42 . If the display in one of the search results display spaces  66  is a group display, for example, then the comment space  68  is used to display the number of the destination candidates in the group. In the case of any ordinary display, the comment space  68  is used to display the distance from the current position. 
     The Return button  69  is a button for returning to the character input screen. The Previous button  74  and the Next button  77  are buttons for respectively scrolling up and scrolling down within the search results display spaces  66 , one display at a time. The Page Up button  75  and the Page Down button  76  are buttons for respectively scrolling up and scrolling down within the search results display spaces  66 , one page at a time. The scroll bar  71  indicates the position of the currently displayed destination candidates among all of the destination candidates. Scrolling up and scrolling down can be done by touching and dragging the scroll bar  71 . 
       FIG. 5  is an exemplary screen that is displayed when the “Eito-Irebun” display in the search results display spaces  66  is selected on the candidate display screen  60  in  FIG. 4 . The selection of the “Eito-Irebun” display can be performed by touching the “Eito-Irebun” display. Alternatively, the selection of the “Eito-Irebun” display can be performed by touching the detail display button  67  that corresponds to the “Eito-Irebun” display. Thus the navigation device  1  is provided with a group selection unit that selects a group that is displayed by a group display. When the group display is selected, the destination candidates that belong to the group are displayed individually by ordinary displays. 
     As shown in  FIG. 5 , when the group display “Eito-Irebun” is selected, the destination candidates that are grouped by the grouping information “e-i-to-i-re-bu-n” (that is, the Eito-Irebun chain stores) are displayed in list form, and the total number of candidates space  65  is updated accordingly. However, on this screen ( FIG. 5 ), the Eito-Irebun Kinuta Store is excluded from the destination candidates that are grouped by the grouping information “e-i-to-i-re-bu-n” because the Eito-Irebun Kinuta Store was already displayed by an ordinary display on the preceding screen ( FIG. 4 ). Note that the screen may also be configured such that even if a destination candidate has already been displayed by an ordinary display on the preceding screen, it is re-displayed if it belongs to the group in the selected group display. In that case, when the group display “Eito-Irebun” is selected, the Eito-Irebun Kinuta Store is re-displayed by an ordinary display. 
     When the user touches the desired destination candidate in the search results display spaces  66 , the navigation device  1  sets that destination candidate as the destination. Thus the navigation device  1  is provided with a destination candidate selection unit that selects a destination candidate that is displayed individually by an ordinary display, as well as with a destination setting unit that sets the selected destination candidate as the destination. The navigation device  1  is also provided with a route search unit that searches for a route to the destination that has been set as described above, as well as with a guidance unit that guides the vehicle along the route that is found. 
       FIG. 6  illustrates an exemplary modified candidate display screen  60 . In the modified example, a display space is omitted by combining the chain store group display with the ordinary display for the individually displayed chain store. Also, a group display “All” is superimposed on an ordinary display for the Eito-Irebun Kinuta Store. That is, if the ordinary display  93  is touched, the Eito-Irebun Kinuta Store is established as the destination, and if the group display  94  is touched, the stores that belong to the Eito-Irebun chain, with the extraction of the Eito-Irebun Kinuta Store, are displayed by ordinary displays in the search results display spaces  66 . 
     Next, a destination candidate display method will be described with reference to  FIG. 7 . The exemplary method may be implemented, for example, by one or more components of the above-described navigation device  1 . For example, the exemplary method may be implemented by the CPU  21  and or information processing control device  20  executing a computer program stored in the first ROM  22 , second ROM  26 , and/or the information storage device  50 . However, even though the exemplary structure of the above-described navigation device  1  may be referenced in the description, it should be appreciated that the structure is exemplary and the exemplary method need not be limited by any of the above-described exemplary structures. 
     As shown in  FIG. 7 , the navigation device  1  acquires the characters that will show the phonetic representation on the character input screen (step  5 ). The navigation device  1  then uses the characters to select the destination candidates from the destination data file  56 . The navigation device  1  is thus provided with a search term input unit that inputs the search term (the phonetic representation) that is used to search for the destination candidates. When the End button  86  is touched on the character input screen, the navigation device  1  shifts to the candidate display screen  60  ( FIG. 4 ) and accepts inputs for the area and the genre. 
     Next, the navigation device  1  acquires an area that is input in the area input space  62  (step  10 ) and also acquires a genre that is input in the genre input space  64  (step  15 ). Once the area and the genre are acquired, the navigation device  1  selects from among the destination candidates that were selected on the character input screen those destination candidates that match the area and the genre. 
     Next, the navigation device  1  creates a group list by listing the selected destination candidates for which the grouping information has been set (step  20 ). Thus the navigation device  1  is provided with a search unit that searches among the destination candidates that are stored in the destination data file  56  for the destination candidates that correspond to the search term. 
     Next, the navigation device  1  acquires an extraction condition for selecting from the group list a destination candidate to be displayed by the ordinary display (step  25 ). The extraction condition may be, for example, that the distance from the position of the vehicle to the destination candidate is within a specified distance (for example, two kilometers). 
     Next, the navigation device  1  determines whether or not all of the destination candidates in the group list have been checked in order to set their display formats (group display, ordinary display) (step  30 ). If a destination candidate exists that has not been checked (NO at step  30 ), then the navigation device  1  acquires one destination candidate from the group list (step  35 ) and determines whether or not the destination candidate satisfies the extraction condition that was acquired at step  25  (step  40 ). For example, when the extraction condition is that the distance from the position of the vehicle to the destination candidate is within a specified distance, the navigation device  1  computes the distance from the current position to the destination candidate and then determines whether or not the distance is within the specified distance. Thus the specified extraction condition can be defined, for example, by using the positional relationship between the position where the destination candidate is located and the current position of the vehicle that is acquired by the current position detection device  10 . Note that this is only one example. For example, the user may also designate the position of his home, then freely set the specified extraction condition based on the positions where the destination candidates are located such that the destination candidates in the vicinity of the user&#39;s home are selected. 
     If the destination candidate satisfies the extraction condition (YES at step  40 ), then the navigation device  1  sets the destination candidate to be displayed by the ordinary display (step  50 ), then returns to step  30 . However, if the destination candidate does not satisfy the extraction condition (NO at step  40 ), then the navigation device  1  sets the destination candidate to be displayed by the group display (step  45 ), then returns to step  30 . If all of the destination candidates have been checked (YES at step  30 ), then the navigation device  1  sets the other destination candidates for which the grouping information has not been set to be displayed by the ordinary displays (step  55 ). 
     Next, the navigation device  1  displays in the search results display spaces  66  ( FIG. 4 ) the destination candidates that were found by the search described above. The candidates that have been set to be displayed by the group display are displayed by the group display, while the destination candidates that have been set to be displayed by the ordinary displays are displayed by the ordinary displays (step  60 ). Thus, the navigation device  1  is provided with a display unit that uses a group display to display the destination candidates under the representative name in the search results display spaces  66  when the destination candidates that were found by the search are grouped by the grouping information. If the destination candidates that were found by the search are not grouped, then the display unit uses the ordinary displays to display the destination candidates individually in the search results display spaces  66 . The display unit also uses the ordinary display to display individually in the search results display spaces  66  a destination candidate that belongs to a group, but that satisfies a specified condition (the extraction condition). 
     Next, an exemplary modified destination candidate display method will be described with reference to the flowchart in  FIG. 8 . The steps in the flowchart that are the same as in  FIG. 7  are assigned the same numbers, and the explanation of those steps will be simplified or omitted. 
     The navigation device  1  acquires the phonetic representation that is input (step  5 ), the area (step  10 ), the genre (step  15 ), and the extraction condition (step  25 ). Next, the navigation device  1  selects from the destination data file  56  the destination candidates that correspond to the phonetic representation, area, and genre. 
     Then, the navigation device  1  processes the selected destination candidates as follows. First, the navigation device  1  checks whether the display formats have been set for all of the selected destination candidates (step  70 ). If a destination candidate exists that has not been checked (NO at step  70 ), then the navigation device  1  acquires the unchecked destination candidate (step  75 ) and determines whether or not the grouping information is set for the destination candidate (step  80 ). If the grouping information is not set for the destination candidate (NO at step  80 ), then the navigation device  1  sets the destination candidate to be displayed by the ordinary display (step  95 ), and then returns to step  70 . However, if the grouping information is set for the destination candidate (YES at step  80 ), then the navigation device  1  determines whether or not the destination candidate satisfies the extraction condition (step  85 ). If the extraction condition is satisfied (YES at step  85 ), then the navigation device  1  sets the destination candidate to be displayed by the ordinary display (step  95 ), then returns to step  70 . If the extraction condition is not satisfied (NO at step  85 ), then the navigation device  1  sets the destination candidate to be displayed by the group display (step  90 ), then returns to step  70 . Finally, if all of the destination candidates have been checked (YES at step  70 ), then the navigation device  1  displays the destination candidates in the search results display spaces  66  ( FIG. 4 ) in accordance with the display formats that have been set (step  60 ). 
     Exemplary implementations of the broad inventive principles can provide at least the following effects described herein: (1) Grouping the chain stores makes it possible to display the chain stores in a group display under the representative name and also makes it possible to use the ordinary display to display a chain store that satisfies the specified extraction condition; (2) The user can use the extraction condition to select the chain stores he thinks need to be selected and to display them using the ordinary displays, even in a case where a large number of stores belong to the chain; and (3) In order to use the ordinary display to display a chain store that satisfies the extraction condition, the user can directly set the chain store as the destination. This makes it unnecessary to use the representative name to set the destination, so it can reduce the number of operations. 
     While various features have been described in conjunction with the examples outlined above, various alternatives, modifications, variations, and/or improvements of those features and/or examples may be possible. Accordingly, the examples, as set forth above, are intended to be illustrative. Various changes may be made without departing from the broad spirit and scope of the underlying inventive principles.