JP5006170B2 - In-vehicle information terminal and control program thereof - Google Patents

Description

  The present invention relates to navigation technology for guiding and guiding to a destination, and an in-vehicle information terminal capable of notifying a user of a destination candidate on a road around a set destination coordinate and allowing the user to select it, and a control method therefor And a control program.

  In recent years, with the spread of automobiles and the development of information processing technology, navigation devices are rapidly spreading as in-vehicle information terminals that are mounted on a moving body such as a vehicle and perform route guidance. The navigation device uses map data prepared in advance and displays not only the current position information of its own vehicle, which is measured by GPS, on the surrounding map, but also calculates the route to the specified destination and displays it on the screen. And synthetic voices to guide the route.

  Here, a general route guidance method will be described. First, a storage medium such as a CD-ROM, DVD-ROM, HDD, etc., using a database selected by quantifying roads, place names, buildings, etc. on a map as map data. In advance, the user sets a destination by using the map data. Then, the position information of the own vehicle is estimated by using at least one of self-contained navigation using a gyroscope and a vehicle speed pulse, and radio navigation using GPS and FM multiplexing, and according to road data in the map database, Search and calculate the taxiway from the estimated vehicle position to the set destination. Thereby, the route guidance is realized by displaying the calculated guide route and the vehicle position on the screen while performing map matching.

  The destinations that are set for calculating the guidance route usually include facilities such as leisure lands, restaurants, and gas stations that are searched using the search function, and the guidance calculated from the vehicle position using this as the destination. Guided by route. Specifically, an operation such as searching for a route up to a road closest to a facility or the like adopted as a destination as a final destination and guiding the route is common.

As a conventional technique for guiding and guiding the nearest road as the final destination, when there is no node at the destination set by the user, a node near the destination is searched, and the node is set as a temporary destination. A navigation device has been proposed that calculates a route by designating and guiding and guiding (see Patent Document 1).
JP 2002-267475 A

  By the way, in the navigation apparatus having a general search function as described above, the road closest to the destination such as the searched facility is set as the final destination. Also in the navigation device described in Patent Document 1, a node near the set destination is searched, and when a plurality of nodes are searched, the node closest to the destination is designated as the final destination. Yes.

  For this reason, if the destination coordinates are specified at the center, etc., when the site area of a facility or the like set as the destination is large, the closest location from the specified destination coordinates is guided away from the desired arrival point. there is a possibility. In addition, when the designated destination coordinates are not on the road, it is difficult to predict how far to be guided.

  The present invention has been proposed in order to solve the above-mentioned problems, and its purpose is to set a point within a predetermined range around the set point when it is determined that the set point is a facility having a large site area. It is to provide an in-vehicle information terminal and a control program capable of notifying the user of a final guide point candidate and selecting the candidate.

The present invention solves the above problems by the following means. The first aspect of the present invention is a vehicle information terminal comprising a storage unit storing map data including link information and a display unit displaying the map data; A search means for searching for a link based on the map data based on the set point received by the receiving means, and a point having the shortest distance to the set point on the link searched by the search means for each link Detecting means for detecting; determining means for determining whether the shortest distance from the point detected by the detecting means to the set point is all equal to or greater than a threshold; and If it is determined that the point below the set number of the point having the shortest distance above the threshold value, whether the point detected by said detecting means And a display control means for outputting to the display unit in the order the shortest distance is smaller until the set point, the display unit, the point where the output, said shortest distance from the point to the set point A flag with a number is displayed on the map in ascending order, and a button having a number corresponding to the number of the flag is displayed .

The invention of claim 6 grasps the invention of claim 1 from the viewpoint of a computer program, and includes a storage unit that stores map data including link information, and a display unit that displays the map data. In the control program for an in-vehicle information terminal comprising a computer, a reception process for receiving a set point in the computer, and a search for searching for a link based on the map data based on the set point received by the reception process A detection process for detecting, for each link, a point having the shortest distance to the set point on the link searched by the search process, and the point from the point detected by the detection process to the set point. A determination process for determining whether the shortest distances are all equal to or greater than a threshold value, and the shortest distance is equal to or greater than a threshold value by the determination process If it is constant, a setting number following point among the points having a minimum distance of more than the threshold value, on the display unit from said detected point in the order the shortest distance is smaller until the set point by said detecting means The display control process to be output, and the output points are displayed on the map in the order of the shortest distance from the point to the set point in the order of the shortest distance, and corresponding to the number of the flag And display processing for displaying a button having a number .

In the above aspects, when the shortest distance from the set point to the detection point is equal to or greater than a predetermined threshold, that is, the set point is a facility having a large site area such as a shopping mall or a golf course, and to the surrounding links Even when the predetermined distance is given, it is possible to notify the user of the detected final point guidance candidates around the set point. Accordingly, even when the point set as the destination is a large site area, the user can display a plurality of peripheral final point guide candidates, so that the point close to the desired set point is finally displayed. It can be selected as a guide point. In addition, the display control means can display the set number of final destination candidates in order from the point set as the destination, so that the point as the destination candidate can be visually viewed on the screen. It is possible to prevent the display from becoming difficult.

  According to a second aspect of the present invention, in the in-vehicle information terminal according to the first aspect, the input unit, the detection unit that detects the vehicle position, and the point displayed on the display unit by the display control unit A selection determination unit that accepts a selection from a user via the input unit, and a navigation unit that calculates a route candidate from the vehicle position to a predetermined point and guides the route, the navigation unit including the selection When the selection means receives a selection of the point from the user via the input unit, a route candidate from the vehicle position to the selected point is calculated and guided.

The invention of claim 7 is the one in which the invention of claim 2 is grasped from the viewpoint of a computer program, and in the control program for an in-vehicle information terminal of claim 6 , an input unit and a detection unit for detecting the position of the vehicle A selection determination process for receiving a selection from a user via the input unit for the point displayed on the display unit by the display control process on the computer, and a predetermined value from the own vehicle position. A navigation process that calculates a route candidate to a point and performs guidance guidance, and the navigation process receives the selection of the point from the user via the input unit by the selection determination process, and the vehicle A route candidate from the position to the selected point is calculated and guided.

  In the above aspect, the guidance guidance to the said point is attained by accepting selection to the desired point from a user via a selection determination means. Therefore, the user can prevent a guide to an unexpected guide point by selecting a desired guide point from the displayed points, and can provide highly accurate guidance according to the user's request.

  A third aspect of the present invention is the in-vehicle information terminal according to the second aspect, further comprising: a number-of-points determination unit that determines whether the display control unit displays a plurality of the points displayed on the display unit. The determination unit is characterized in that when the number of points determination unit determines that there are a plurality of points, the selection unit receives a selection from the user via the input unit.

The invention of claim 8 grasps the invention of claim 3 from the viewpoint of a computer program. In the control program for an in-vehicle information terminal according to claim 7 , the computer controls the display control process to execute the display control process. A point number determination process for determining whether or not there are a plurality of points displayed on the display unit is executed, and the selection determination process is performed when the plurality of points are determined by the point number determination process. The selection to the said point from the user through a part is received.

  In the aspect as described above, since the selection determination unit can accept selection from the user when there are a plurality of points as final destination candidates, the number of points detected by the detection unit is singular. In this case, it is possible to omit the selection operation from the user and guide to the point.

According to a fourth aspect of the present invention, in the in-vehicle information terminal according to the first or second aspect, when the set point is set via the input unit on the map data displayed on the display unit by a scroll operation. The detection means detects, for each link, a point having the shortest distance to the set point on the link searched by the search means, and among the points having the shortest distance for each detected link The point having the shortest distance is extracted, and the display control means outputs the point having the shortest distance to the display unit.

According to a fifth aspect of the present invention, in the in-vehicle information terminal according to the fourth aspect of the invention, the navigation means is configured such that the point having the shortest distance is extracted by the detection means or the shortest by the display control means. When a point having a distance is output to the display unit, route candidates from the vehicle position to the extracted point are calculated and guided.

  In the above aspect, when setting the destination on the map when the map is scrolled, it is considered that the destination is set based on the user's intention. By using the point on the nearest link as the final guide point, the selection operation that occurs when the set destination is a large area such as a shopping mall or a golf course is omitted, and an in-vehicle information terminal with improved convenience is provided. It becomes possible to provide.

  As described above, according to the present invention, even if the set point is a facility having a large site area such as a shopping mall or a golf course, a plurality of guide points around the set point are determined as final guide points. An in-vehicle information terminal and a control program that can be notified to a user as candidates can be provided. As a result, by selecting a desired point from the final guide point candidates notified by the user, it is possible to prevent an unexpected guide to the guide point, and a highly accurate route search in accordance with the user's wish can be performed. It becomes possible.

  Next, the best mode for carrying out the present invention will be described with reference to FIGS.

[1. This embodiment]
[1.1. Constitution]
In the present embodiment, for in-vehicle guidance that searches for guidance point candidates within a predetermined range based on the set destination coordinates and guides the user by selecting a desired point from the searched guidance point candidates. An information terminal (hereinafter referred to as “the present apparatus”) will be described and can be grasped as a control program. The configuration of the present apparatus is shown in FIG.

  Reference numeral 1 denotes an FM multiplex reception and processing unit for acquiring VICS (Vehicle Information and Communication System) information as traffic information, and reference numeral 2 denotes a beacon reception and processing unit for acquiring VICS information.

  Reference numeral 3 denotes a main CPU (central processing unit) that controls the entire system and its peripheral circuits, and is a control unit that performs information processing including control of each part of the apparatus. 4 is a dynamic RAM (DRAM) for loading the main program, 5 is a static RAM (SRAM) with battery backup for holding memory contents such as settings even when the main power is turned off, and 6 is for starting up etc. The ROM is accessed from the control unit 3. Here, the main memory M includes a DRAM 4, an SRAM 5, and a ROM 6.

  Reference numeral 7 denotes a display unit for drawing and displaying information such as a map, and has a display screen such as a liquid crystal display panel. Reference numeral 8 denotes a video RAM (VRAM) provided for the display unit 7.

  Reference numeral 9 denotes an input unit that receives input of information and operations, and is a control device that detects input from touch keys and the like. In addition to the keys, a remote control unit, a touch sensor integrated with the display panel, or the like can be used alone or in combination.

  A user interface unit 10 connects the display unit 7 or the input unit 9 and the control unit 3 using an I / O control circuit, a driver, or the like. Reference numeral 11 denotes a TV receiving and processing unit for receiving TV (various television broadcasts). A vehicle information acquisition unit 12 detects an operation and a state such as a vehicle speed pulse and parking.

  A storage device 13 is a storage unit that stores various databases using a storage medium such as an HDD, a DVD-ROM, or a CD-ROM. The storage unit 13 stores not only a map database (typically, a route search database and a map display database) but also other search data and map related data.

  As shown in the example of FIG. 2, the map database composed of two types for route search and map display includes road information including nodes set at intersections and data having links between adjacent nodes. Each link is added with a link ID in order to associate a route search link and a map display road link. In addition to coordinates as link information, each link stores, for example, restriction information such as prohibition of passage in the forward direction on the link.

  The map display database and the route search database are usually configured by different data, and the route search database includes the minimum necessary data for the route search to perform the route search at high speed. On the other hand, the map display database includes detailed road shape information (shape point sequence), area shape information and the like for display.

  The map display database and the route search database are associated with the previously described link ID. As will be described later, points around the destination coordinates searched by the nearby link search unit 34 in the control unit 3 are linked IDs. Used to identify from a map display database with accurate shape information. In general, the route search is performed based on the specified link ID based on the route search database.

  Reference numeral 14 denotes a positioning unit that obtains navigation information related to the behavior of the host vehicle such as the current position and direction using a positioning technique (for example, GPS, gyroscope, geomagnetic sensor, etc.). Here, the own vehicle position information is determined by the radio navigation information acquired using the GPS that is the positioning unit 14 and the independent navigation information acquired through the gyroscope. The information received from the FM multiplex reception and processing unit 1 can be adopted as the radio navigation information, and the information calculated based on the vehicle speed detected through the vehicle information acquisition unit 12 can be adopted as the independent navigation information. is there.

  Moreover, the control part 3 has the following processing means (31, 32 ... shown in FIG. 1) corresponding to the function and effect | action mentioned later. Reference numeral 31 denotes a vehicle position detection unit that sequentially calculates and detects the current position information of the vehicle based on information from the positioning unit 14 and the vehicle information acquisition unit 12. Reference numeral 32 denotes a destination receiving unit that receives position information of a destination designated by the user through the input unit 9. For example, the user designates a facility as a destination by using a facility search function, and receives position information of the destination via the destination receiving unit 32.

  33 is based on the current position information of the own vehicle detected by the own vehicle position detection unit 31 and the position information of the destination from the destination reception unit 32, and is similar to the conventional navigation device to move from the own vehicle position to the destination. A route calculation unit that calculates route candidates. Further, the route calculation unit 33 calculates route candidates from the vehicle position detected by the vehicle position detection unit 31 to the final destination which is a guide point received by the selection determination unit 38 described later. In addition, in this embodiment, although it has the structure provided with the route calculation part 33, the aspect which does not include the said route calculation part 33 is also included.

  Reference numeral 34 denotes a neighborhood link search unit that searches for a road link within a predetermined range around the coordinates on the map of the destination received through the destination receiving unit 32. For example, as shown in FIG. 3, the neighborhood link search unit 34 searches for links between all intersections (between nodes) existing within a radius Nm around the coordinates on the destination map based on the link information.

  35 is a proximity point detection that detects a point on the link having the shortest distance from the destination coordinate for each link within a predetermined range centered on the destination coordinate searched by the neighborhood link search unit 34. Part. The neighborhood point detection unit 35 calculates the shortest distance from the destination coordinates for each link searched by the neighborhood link search unit 34 as shown in FIG. 3, and selects a point on the link having the shortest distance as a neighborhood point. Detect as.

  36 is a distance determination that determines whether or not the distance from the proximity point for each link within the predetermined range detected by the proximity point detection unit 35 to the destination coordinate received by the destination reception unit 32 is greater than or equal to a predetermined value. Part. In other words, the distance determination unit 36 determines whether the distance from the vicinity point to the destination for each link calculated by the vicinity point detection unit 35 is equal to or greater than a predetermined value. It is judged whether it is a place with a relatively large site area such as a golf course. This is because, when the destination set by the user is a place having a large site area, it is effective to search for nearby guidance point candidates and present them to the user.

  37, when the distance determination unit 36 determines that all the distances from the proximity point for each link within the predetermined range to the destination coordinates received by the destination reception unit 32 are greater than or equal to the predetermined value, It is a number-of-neighboring-points determination part which determines whether is singular. When it is determined that the number of neighboring points is not singular, that is, there are a plurality of neighboring points, the plurality of neighboring points are displayed to the user via the display control unit 39 to be described later, and are singular. If it is determined, the route calculation unit 33 calculates a route candidate from the vehicle position to the vicinity point.

  38, when it is determined that there are a plurality of neighboring points by the neighboring point number judging unit 37, the plurality of neighboring points are displayed on the display unit 7 via the display control unit 39 described later, and the displayed neighboring points. Is a selection determination unit that determines whether or not a user has made a selection through the input unit 9. The selection determination unit 38 receives a nearby point selected by the user as a final destination. That is, when a plurality of nearby points are displayed as guide point candidates on the display unit 7, a desired nearby point is selected by the user, but the selection determining unit 38 determines whether or not this selection is made, and selects When this is done, the neighboring point is accepted as the final destination of the route candidate calculated via the route calculation unit 33.

  Reference numeral 39 denotes a display control unit that outputs and displays the plurality of neighboring points on the display unit 7 when the neighboring point number judging unit 37 determines that there are a plurality of neighboring points. In addition, the display control unit 39 outputs the route candidate calculated by the route calculation unit 33 from the vehicle position to the destination to the display unit 7 as a guidance route, similarly to a general navigation device, A guidance route to a nearby point that has received a selection from the user via the selection determination unit 38 is output to the display unit 7 and displayed.

  In addition, the display control unit 39 can set the number displayed on the display unit 7 to be, for example, within M for the proximity points determined by the proximity point number determination unit 37 to be plural, In this case, among the plurality of neighboring points, M pieces are displayed in order from the destination coordinates received by the destination receiving unit 32. For example, when the upper limit of the proximity points to be displayed is set to three, it is displayed as shown in FIG. 4, and the user selects one of the proximity points as the final destination via the input unit 9.

[1.2. Action]
Next, the operation of the present embodiment based on the above configuration will be described below with reference to the flowchart of FIG. First, based on the information acquired from the vehicle information acquisition unit 12, the positioning unit 14, and the FM multiplex reception and processing unit 1, the current position information of the own vehicle is detected through the own vehicle position detection unit 31 (STEP 501). Then, the destination receiving unit 32 receives the location information of the destination set by the user through the input unit 9 (STEP 502).

  Next, the neighborhood link search unit 34 searches for a link within a predetermined range around the coordinates on the map of the destination received through the destination receiving unit 32 (STEP 503). When the nearby link search unit 34 searches for a link within a predetermined range (YES in STEP 503), the nearby point detection unit 35 determines the shortest distance from the destination coordinates received through the destination reception unit 32 for each of the links. A nearby point having a distance is detected (STEP 504). In addition, when detecting the nearby point on each link searched by the nearby link searching unit 34, the nearby point detecting unit 35 calculates the shortest distance for the link from the destination coordinates.

  For the distance from the destination coordinate to the neighboring point calculated in the process of detecting the neighboring point having the shortest distance from the destination coordinate by the neighboring point detecting unit 35, the distance determining unit 36 has all the distances. It is determined whether the value is equal to or greater than a predetermined value (STEP 505). When the distance determination unit 36 determines that all the distances from the destination coordinates to the neighboring points are greater than or equal to the predetermined value (YES in STEP 505), the neighboring point number determination unit 37 has a distance greater than or equal to the predetermined value. It is determined whether the number of neighboring points is singular (STEP 506).

  When it is determined that there are a plurality of nearby points (not singular) by the number-of-neighboring points determination unit 37 (NO in STEP 506), the display control unit 39 displays all the nearby points determined to be in the plurality on the display unit 7. Output and display (STEP507). At this time, if the display control unit 39 has set an upper limit (for example, M) of displayable nearby points, the upper limit number of nearby points is displayed via the display unit 7.

  In STEP 503, when the link is not searched within the predetermined range centered on the destination coordinates by the neighborhood link search unit 34 (NO in STEP 503), an error is displayed on the display unit 7 via the display control unit 39 ( (STEP 510). Further, in STEP 505, when the distance determination unit 36 determines that the distance from the destination coordinates to the nearby point is less than the predetermined value (NO in STEP 505), the same as the case where the link is not searched by the nearby link search unit 34. Then, an error is displayed on the display unit 7 via the display control unit 39 (STEP 510). If a link is not searched within a predetermined range based on coordinates on the destination map (NO in STEP 503), or the distance determination unit 36 determines that the distance from the destination coordinates to a nearby point is below a predetermined value. If it is determined (NO in STEP 505), a route search may be performed by setting a nearby point closest to the set destination as the final destination instead of displaying an error.

  In STEP 507, when a plurality of nearby points are displayed via the display unit 7 by the display control unit 39, the selection determination unit 38 has selected from the user through the input unit 9 for the displayed nearby points. It is determined whether or not (STEP508). When it is determined that there is a selection of a nearby point from the user and the neighboring point is accepted (YES in STEP 508), this neighboring point is accepted as a final destination candidate, and the route calculation unit 33 determines from the vehicle position. A guidance route to the vicinity point is calculated and guided by the display control unit 39 via the display unit 7 (STEP 509).

In STEP 506, when it is determined that the number of neighboring points having a distance greater than or equal to the predetermined value from the destination coordinates is singular ( YES in STEP 506), the singular neighboring point is set as the final destination. The route calculation unit 33 calculates a guidance route from the vehicle position, and guides it through the display unit 7 by the display control unit 39 (STEP 509).

  The embodiment described in the flowchart of FIG. 5 is associated with the position information when the destination receiving unit 32 receives the position information of the destination set by the user through the input unit 9 in STEP 502. The embodiment which added the determination process which determines whether the site area of the destinations, such as a given facility, is more than a predetermined value is included. Specifically, whether or not the data relating to the site area of each facility is registered as a database in the storage unit 13 and the data relating to the site area of the facility or the like received as the destination is read from the storage unit, is the predetermined value or more? Determine whether or not.

  Only when it is determined that the site area of the destination is greater than or equal to the predetermined value by this determination process, the processing after STEP 503 is executed, and when it is not determined that the destination area is greater than or equal to the predetermined value, the flow according to the present embodiment ends. To do. In addition, in order to prevent the data regarding the site area registered in the storage unit 13 from increasing, it is possible to set a flag for each facility whose site area is a predetermined threshold or more in advance.

  As described above, according to the present embodiment, even if the point set as the destination is a facility having a large site area such as a shopping mall or a golf course, a plurality of guide points around the set point are finally determined. It is possible to provide an in-vehicle information terminal and a control program that can be notified to a user as a typical guide point candidate. As a result, by selecting a desired point from the final guide point candidates notified by the user, it is possible to prevent an unexpected guide to the guide point, and a highly accurate route search in accordance with the user's wish can be performed. It becomes possible.

[2. Other Embodiments]
In addition, this invention is not limited to embodiment which guides the guidance route to the vicinity point which the user selected among the some vicinity points displayed on the above display parts 7, but such guidance Embodiments excluding route processing are also included. That is, an embodiment of the present invention up to the process of displaying to the user all neighboring points whose distance to the destination coordinate is equal to or greater than a predetermined value among neighboring points in a predetermined range centered on the destination coordinate is disclosed. Includes.

  The specific processing procedure will be described with reference to the flowchart in FIG. 6. The processing from STEP 601 to 605 is the same as that in the flowchart in FIG. 5. In STEP 605, the neighborhood within the predetermined range centered on the destination coordinates. If it is determined that the distances from the destination coordinates are all equal to or greater than the predetermined value, all neighboring points within the predetermined range are all displayed on the display unit 7 via the display control unit 39 (STEP 606). . That is, the predetermined value determined by the distance determination unit 36 without performing the process of whether or not the number of adjacent points having a distance equal to or greater than the predetermined value by the vicinity point determination unit 37 according to STEP 506 in the flowchart of FIG. All the nearby points having the above distances are displayed on the display unit 7 by the display control unit 39.

  In addition, the present invention is not limited to the above-described embodiment in which the distances from the received destination coordinates to the nearby points within the predetermined range are all equal to or greater than the predetermined value and the user is allowed to select, and scrolling is performed. When the desired point on the map is directly set as the destination by the above, an embodiment in which the point closest to the set destination is set as the final guide point is also included.

  Specifically, based on the information acquired from the vehicle information acquisition unit 12, the positioning unit 14, and the FM multiplex reception and processing unit 1, the current position information of the own vehicle is detected through the own vehicle position detection unit 31. (STEP 701) When the user sets a desired point on the map by scrolling, the destination receiving unit 32 receives position information of the set destination (STEP 702).

  The neighborhood link search unit 34 searches for a link within a predetermined range around the coordinates on the map of the destination received through the destination receiving unit 32 (STEP 703). When the nearby link search unit 34 searches for a link within the predetermined range (YES in STEP 703), the nearby point detection unit 35 determines the shortest distance from the destination coordinates received through the destination reception unit 32 for each of the links. A nearby point having a position is detected (STEP 704). Further, the neighborhood point detection unit 35 extracts a neighborhood point closest to the destination coordinate among the neighborhood points on each link having the shortest distance from the destination coordinate (STEP 705). That is, a neighboring point having the shortest distance is extracted from neighboring points on each link having the shortest distance.

  When the vicinity point closest to the destination coordinate is extracted by the vicinity point detection unit 35, the display control unit 39 outputs the vicinity point as a final guidance point on the display unit 7 and displays it (STEP 706). In STEP 706, when the vicinity point is displayed by the display control unit 39 via the display unit 7, the route calculation unit 33 automatically calculates the guidance route from the vehicle position to the vicinity point from the vehicle position, The guidance route is displayed and guided via the display unit 7 (STEP 707).

  In addition, the guidance route calculation process by the route calculation unit 33 does not display the vicinity point closest to the destination coordinate extracted by the vicinity point detection unit 35 in STEP 706, and the vicinity closest to the destination coordinate from the own vehicle position. An embodiment for calculating a guidance route to a point is also included.

  Further, the present invention is not limited to the process of automatically calculating the guidance route in the route calculation unit 33, and the selection determination unit 38 determines whether there is a selection from the user through the input unit 9 for the displayed nearby point. Embodiment in which the route calculation unit 33 calculates a guidance route from the vehicle position to the neighboring point and displays the guidance route via the display unit 7 when it is determined that there is a selection. Is also included.

  In the embodiment in which the cursor position on the map when the map is scrolled as described above is set as the destination, the point corresponding to the cursor position is set as the destination based on the user's intention. It is done. Therefore, by selecting the point on the link closest to the set destination as the final guide point, the selection operation that occurs when the set destination has a large site area such as a shopping mall or a golf course can be omitted. It is possible to provide an in-vehicle information terminal with improved performance.

The block diagram which shows the structure of embodiment of this invention The figure which shows the structural example of the map database which concerns on embodiment of this invention. The figure which shows the example of a detection of the near point on the link in the predetermined range centering on the destination which concerns on embodiment of this invention The figure which shows the example of a screen display of the nearby point by the display control part in embodiment of this invention The flowchart which shows the effect | action which concerns on embodiment of this invention A flowchart (1) which shows the operation concerning other embodiments of the present invention. A flowchart (2) which shows the operation concerning other embodiments of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... FM multiplex reception and processing part 2 ... Beacon reception and processing part 3 ... Control part (Main CPU and its peripheral circuit)
4. Dynamic RAM (DRAM)
5. Static RAM (SRAM)
6 ... ROM
7 ... Display 8 ... Video RAM (VRAM)
9. Input unit (touch key control device)
DESCRIPTION OF SYMBOLS 10 ... User interface part 11 ... TV reception and processing part 12 ... Vehicle information acquisition part 13 ... Memory | storage part 14 ... Positioning part 31 ... Own vehicle position detection part 32 ... Destination reception part 33 ... Route calculation part 34 ... Neighborhood link search part 35 ... Neighboring point detection unit 36 ... Distance determination unit 37 ... Neighboring point number determination unit 38 ... Selection determination unit 39 ... Display control unit

Claims (8)

In an in-vehicle information terminal including a storage unit that stores map data including link information and a display unit that displays the map data.
An accepting means for accepting the set point;
Search means for searching for a link based on the map data based on the set point received by the receiving means;
Detecting means for detecting, for each link, a point having the shortest distance to the set point on the link searched by the searching means;
Determination means for determining whether or not all the shortest distances from the point detected by the detection means to the set point are equal to or greater than a threshold;
When the determination means determines that the shortest distance is greater than or equal to a threshold, the setting of the number of points having the shortest distance greater than or equal to the threshold not more than a set number from the points detected by the detection means Display control means for outputting to the display unit in ascending order of the shortest distance to the point ,
The display unit displays the numbered flag corresponding to the number of the flag on the map in order of the shortest distance from the point to the set point in ascending order of the shortest distance. An in-vehicle information terminal characterized by displaying a button having the same . An input section;
A detection unit for detecting the vehicle position;
A selection determination unit that accepts a selection from the user via the input unit for the point displayed on the display unit by the display control unit;
Navigation means for calculating and guiding the route candidate from the vehicle position to a predetermined point,
When the navigation means accepts selection of the point from the user via the input unit by the selection determining means, the navigation means calculates a route candidate from the vehicle position to the selected point, and guides the guidance. The in-vehicle information terminal according to claim 1, wherein A number-of-points determination unit that determines whether the display control unit displays a plurality of the points displayed on the display unit;
The selection determination unit receives a selection of the point from the user via the input unit when the point number determination unit determines that there are a plurality of the points. The vehicle-mounted information terminal described. When the set point is set via the input unit on the map data displayed on the display unit by scroll operation,
The detection means detects, for each link, a point having the shortest distance to the set point on the link searched by the search means, and among the points having the shortest distance for each detected link, Extract points with short distances,
The in-vehicle information terminal according to claim 1, wherein the display control unit outputs the point having the shortest distance to the display unit. When the point having the shortest distance is extracted by the detecting unit, or when the point having the shortest distance is output to the display unit by the display control unit, the navigation unit The vehicle-mounted information terminal according to claim 4 , wherein a route candidate from to the extracted point is calculated and guided. In a control program for an in-vehicle information terminal comprising a storage unit that stores map data including link information, a display unit that displays the map data, and a computer.
In the computer,
A reception process for accepting a set point;
A search process for searching for a link based on the map data based on the set point received by the reception process;
A detection process for detecting, for each link, a point having the shortest distance to the set point on the link searched by the search process;
A determination process for determining whether all the shortest distances from the point detected by the detection process to the set point are equal to or greater than a threshold;
When it is determined by the determination process that the shortest distance is equal to or greater than a threshold value, the number of points having a shortest distance equal to or greater than the threshold value is set from the points detected by the detection unit to the set number of points or less. Display control processing to output to the display unit in ascending order of the shortest distance to the point ;
The output points are displayed in order from the shortest distance from the point to the set point in ascending order of the numbered flag on the map, and a button having a number corresponding to the flag number is displayed. Display processing,
A control program for an in-vehicle information terminal characterized in that An input section;
A detection unit for detecting the vehicle position,
In the computer,
A selection determination process for accepting a selection from a user via the input unit for the point displayed on the display unit by the display control process;
Calculating a route candidate from the vehicle position to a predetermined point, and performing a navigation process for guiding and guiding,
When the navigation process accepts selection of the point from the user via the input unit by the selection determination process, the navigation process calculates a route candidate from the vehicle position to the selected point, and guides the guidance. The on-vehicle information terminal control program according to claim 6 , wherein Causing the computer to execute a point number determination process for determining whether or not there are a plurality of the points displayed on the display unit by the display control process;
Said selection determining process, when the points by the ground score determining process is determined to be more, in claim 7, wherein the receiving a selection to the point from the user via the input unit The vehicle information terminal control program described.