JP2004132749A - Navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device capable of acquiring information of facilities used on a highway. <P>SOLUTION: A guide image processing part 40 included in a navigation controller 1 produces a highway guide image to be displayed during traveling on the highway. The image contains facility names of a plurality (for example, three) of facilities existing in front of a vehicle, and when passing the nearest facility from its own vehicle position, a display content thereof is updated. Updation at the passing time of a service area and a parking area is performed not at the point of time when passing a branch spot for advancing into the area but at the time when passing a merging point for merging from the area to a main line. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a navigation device that provides guidance on a service area, a parking area, and the like that can be used while traveling on a highway.
[0002]
[Prior art]
In general, an in-vehicle navigation device performs a predetermined navigation operation for assisting a driver while driving a vehicle by image display or sound output. For example, a map image around the position of the host vehicle is displayed on the screen, a traveling route to the destination is displayed on the map image, an intersection where the vehicle turns right or left to travel along the traveling route, or the traveling of the intersection. A navigation operation for guiding the direction by voice is performed. Also, in many navigation devices, while the vehicle is traveling on the highway, apart from a map image around the position of the vehicle, an image that guides various facilities where a branch from the main line occurs on the traveling highway (hereinafter, referred to as a map image). This image is referred to as a "highway guide image.") (For example, see Patent Document 1). In this navigation device, an expressway guidance image showing a plurality of (for example, four) facilities located ahead of the traveling position of the vehicle is created and displayed, and each time the vehicle passes through the closest facility, the highway guidance image is displayed. The content is updated.
[0003]
[Patent Document 1]
JP-A-8-304085 (pages 7-13, FIG. 1-24)
[0004]
[Problems to be solved by the invention]
By the way, in the navigation device and the like disclosed in Patent Document 1 described above, a highway guide image is created to guide a driver or the like to facilities that can be used while traveling on the highway. When the point has passed, the contents of a plurality of facilities included in the expressway guidance image are updated. However, if the contents of a plurality of facilities are uniformly updated in this way, inconvenience has occurred depending on how to use the expressway guidance image. In other words, for interchanges and junctions, even if an update process is performed to turn off the display of these facility names when passing through the branching point that enters them, detailed facility information will be applied to the facilities that have passed since then. There is no particular inconvenience because it is hard to think about displaying. However, in the case of a service area or parking area, if an update process is performed to erase the display of the facility name or the like when passing through a branch that enters the service area, the vehicle will attempt to use these facilities and the vehicle will be in the service area or parking area. There is a problem that the information of the facility being used cannot be obtained because the display of the facility name or the like has already disappeared when the vehicle has entered. Therefore, when the facility name or the like is displayed in the expressway guidance image, even if detailed information of this facility can be obtained by a simple operation, conventionally, these facilities are not provided in the parking lot of the service area or the parking area. Even if you try to obtain detailed information of the facility, the name of the facility such as the service area to be displayed has disappeared from the expressway guidance image, so a special operation to specify these facility names, for example, the facility search function Therefore, it is necessary to directly input a name of a service area or the like using an operation for extracting a corresponding facility or a character input function, and a complicated operation has to be performed to obtain detailed information.
[0005]
The present invention has been made in view of such a point, and an object of the present invention is to provide a navigation device which can obtain information on facilities used on an expressway.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problem, in the navigation device of the present invention, it is determined that the vehicle is traveling on the highway by the traveling road determination unit that determines that the vehicle is traveling on the highway and the traveling road determination unit. Sometimes, a predetermined number of facilities along the highway existing ahead of the own vehicle position are selected in the order of proximity to create a guide image that can identify these facilities, and a junction where branch roads extending from the facilities merge. A guide image processing means for updating the selected combination of the plurality of facilities when passing through a point; and a display processing means for displaying a guide image created and updated by the guide image processing means on a display device. I have. When providing guidance for a facility located ahead of the vehicle position along the highway, the display on this facility is displayed until the vehicle position passes the junction where the branch road extending from the facility merges. The display related to the facility is left without being erased by the update, and information on the facility being used can be obtained.
[0007]
In addition, the rest facilities are included in the plurality of facilities selected corresponding to the guide image described above, and the guide image processing means updates the contents of the guide image for the rest facility when passing the junction. For facilities other than the resting facilities, it is desirable to update the content of the guidance image when passing the branch point where the main line before the junction merges into the facilities other than the resting facilities. Since the display related to the rest facility is displayed even after the branch point for going to the rest facility, information can be obtained while using the rest facility.
[0008]
Further, it is desirable that the rest facility described above includes a service area and a parking area. This makes it possible to reliably obtain information on the service area and the parking area until the service area and the parking area pass a junction where the branch roads extending from these facilities merge.
[0009]
Further, it is desirable that facilities other than the rest facilities described above include an interchange and a junction. As a result, information about these interchanges and junctions can be made not to be displayed after passing through the branching point that enters these facilities, so that it is possible to eliminate erroneous judgment of whether or not to use these facilities. it can.
[0010]
In addition, the guide image processing means described above is configured such that, for a facility closest to the own vehicle position among a plurality of facilities selected in accordance with the guide image, a junction point which enters the facility from the main line and a junction corresponding to the facility When the own vehicle position is included between the vehicle and the point, it is desirable to create the guide image in a display mode that indicates that the vehicle is passing through the facility. As a result, when passing without using a facility, the display on the passing facility is performed in a display mode different from that before or on other facilities, so whether the displayed facility is a facility that can be used from now on. , It is possible to inform the user whether the facility is already in use and cannot be used.
[0011]
In addition, the above-described guide image includes a distance from the own vehicle position to each of the plurality of facilities, and the guide image processing unit determines the distance from the own vehicle position and a branch point to enter each facility from the main line. It is desirable to use the distance between This makes it possible to determine a point to enter each facility based on these distances, independent of the presence or absence of the display of the facility name or the like.
[0012]
In addition, instructing means for instructing the user to display detailed information of a plurality of facilities selected corresponding to the guide image described above, and the detailed information is included when the instructing means instructs to display the detailed information. It is preferable that the information processing apparatus further include facility information creating means for creating an image to be created, and display the image created by the facility information creating means on the display device by the display processing means. This makes it easy to obtain detailed information on the facility being used.
[0013]
Further, it is desirable that the above-mentioned merging point is a point merging with the main line of the expressway. As a result, when the user leaves the resting facility or the like and returns to the main line, it is possible to surely erase the display related to this facility.
Further, it is desirable that the above-mentioned merging point is a point merging with a general road. This makes it possible to reliably turn off the display of these facilities when you enter a general road from a rest facility without passing through the main line, or when you enter a general road via an interchange or other facility. Become.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an in-vehicle navigation device according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration of a navigation device according to an embodiment. The navigation device shown in FIG. 1 includes a navigation controller 1, a DVD 2, a disk reader 3, a remote control (remote control) unit 4, a vehicle position detector 5, a display device 6, and an audio unit 7.
[0015]
The navigation controller 1 controls the entire operation of the navigation device. The function of the navigation controller 1 is realized by executing a predetermined operation program using a CPU, a ROM, a RAM, and the like. The detailed configuration of the navigation controller 1 will be described later.
[0016]
The DVD 2 is an information recording medium that stores map data necessary for map display, facility search, route search, expressway guidance image display, and the like. The DVD 2 stores map data in units of rectangular figures divided into appropriate sizes by longitude and latitude. The map data of each leaf is specified by specifying the leaf number and can be read out.
[0017]
The disk reader 3 can load one or a plurality of DVDs 2 and reads map data from any one of the DVDs 2 under the control of the navigation controller 1. Note that the disc to be loaded is not necessarily a DVD, but may be a CD. Alternatively, both a DVD and a CD may be selectively loaded.
[0018]
The remote control unit 4 includes a joystick for designating directions such as up, down, left, and right, and various operation keys such as a numeric keypad for inputting numbers and a "decision key" for confirming various settings. A signal is output to the navigation controller 1.
[0019]
The vehicle position detection unit 5 includes, for example, a GPS receiver, a direction sensor, a distance sensor, and the like, detects a vehicle position (longitude, latitude) at a predetermined timing, and outputs a detection result.
The display device 6 displays various images such as a map image around the position of the vehicle and a search result of the surrounding facilities based on the drawing data output from the navigation controller 1. The audio unit 7 outputs a guidance voice or the like generated based on a voice signal input from the navigation controller 1 into the vehicle interior.
[0020]
Next, a detailed configuration of the navigation controller 1 will be described. The navigation controller 1 shown in FIG. 1 includes a map buffer 10, a map reading control unit 12, a map drawing unit 14, a vehicle position calculation unit 20, a route search processing unit 22, a guidance route drawing unit 24, a voice guidance unit 26, and a facility search unit. 30, a facility information drawing unit 32, a guidance image processing unit 40, an input processing unit 50, and a display processing unit 60.
[0021]
The map buffer 10 temporarily stores map data read from the DVD 2 by the disk reader 3. The map reading control unit 12 outputs a read request for map data in a predetermined range to the disk reading device 3 in accordance with the vehicle position calculated by the vehicle position calculating unit 20 and an instruction from the input processing unit 50. The map drawing unit 14 performs a drawing process necessary for displaying a map image based on the map data stored in the map buffer 10 to create map image drawing data.
[0022]
The vehicle position calculation unit 20 calculates the own vehicle position based on the detection data output from the vehicle position detection unit 5, and calculates the own vehicle position when the calculated own vehicle position is not on the road in the map data. A map matching process to be corrected is performed. Further, the vehicle position calculation unit 20 performs an operation of determining whether or not the own vehicle position is on the highway, that is, whether or not the own vehicle is traveling on the highway. Note that this determination operation may be performed by the guidance image processing unit 40.
[0023]
The route search processing unit 22 searches for a traveling route (guidance route) that connects a departure place and a destination (or a waypoint) according to predetermined search conditions. The guidance route drawing unit 24 generates guidance route drawing data for displaying the guidance route obtained by the search processing by the route search processing unit 22 in a superimposed manner on a map. The voice guidance unit 26 generates a voice signal such as an intersection guidance necessary for guiding the vehicle along the guidance route obtained by the search processing by the route search processing unit 22.
[0024]
The facility search unit 30 searches for facilities that satisfy search conditions specified by the user. The facility information drawing unit 32 generates facility information drawing data including detailed information of one facility searched by the facility search unit 30.
The guidance image processing unit 40 generates guidance image drawing data for displaying a highway guidance image while traveling on a highway. The expressway guidance image includes the names (facility names) of a plurality of facilities on the expressway such as a service area, a parking area, an interchange, and a junction to which the vehicle will arrive. In the present embodiment, when any one of the plurality of facility names is specified by performing a predetermined operation, the facility information drawing data necessary for displaying the detailed information of the specified one facility is the facility information drawing data. Generated by the unit 32.
[0025]
The input processing unit 50 outputs an instruction for performing an operation corresponding to various operation instructions input from the remote control unit 4 to each unit in the navigation controller 1. The display processing unit 60 receives map image drawing data generated by the map drawing unit 14 and displays a map image in a predetermined range on the screen of the display device 6 based on the drawing data. When the facility information drawing data generated by the facility information drawing unit 32, the guide route drawing data generated by the guide route drawing unit 24, and the guide image drawing data generated by the guide image processing unit 40 are input, the display is performed. The processing unit 60 superimposes the drawing data on the map image and displays it on the screen of the display device 6.
[0026]
The vehicle position calculation unit 20 described above serves as a traveling road determination unit, the facility information drawing unit 32 serves as a facility information creation unit, the guide image processing unit 40 serves as a guide image processing unit, and the remote control unit 4 and the input processing unit 50 serve as an instruction unit. , The display processing unit 60 corresponds to the display processing means.
[0027]
The navigation device of the present embodiment has such a configuration. Next, an operation of displaying a highway guidance image while traveling on a highway will be described.
FIG. 2 is a flowchart showing an operation procedure for displaying a highway guidance image while driving on a highway. The vehicle position calculation unit 20 determines whether or not the vehicle is traveling on a highway based on the calculated vehicle position (Step 100). When the vehicle is not traveling on the highway, a negative determination is made, and after a normal map display process for displaying a map image around the own vehicle position is performed (step 101), the determination process of step 100 is repeated.
[0028]
If the vehicle is traveling on the highway, an affirmative determination is made in the determination of step 100. Next, the guidance image processing unit 40 determines that the guide image processing unit 40 is to join the main line ahead of the vehicle position on the highway. A certain service area (SA) and a parking area (PA) are extracted (step 102).
[0029]
FIG. 3 is a diagram illustrating a branch point and a merging point corresponding to a service area. As shown in FIG. 3, near the service area (chojabara SA), a branch point (SA branch point) from the main line R1 to the branch road R3 going into the service area, and a main line after passing through this branch point. There is a merging point (SA merging point) where R2 merges with a branch road R3 extending from within the service area. The same applies to the parking area. In the vicinity, a branch point (PA branch point) where the main road separates from a branch road toward the parking area, and a junction where the branch road extending from the parking area merges with the main line. (PA merging point) exists. In step 102 described above, a predetermined number of service areas and parking areas in which the SA junction and the PA junction exist ahead of the own vehicle position are extracted.
[0030]
Next, the guidance image processing unit 40 extracts an interchange (IC) or a junction (JCT) on the expressway where the branch point is located ahead of the own vehicle position (step 103). Unlike the service area and the parking area described above, these extraction processes are performed by focusing on branch points that enter these facilities. For example, interchanges and junctions are extracted until a predetermined number is reached.
[0031]
Next, the guide image processing unit 40 selects a predetermined number from the service area and the parking area extracted in the above-described step 102 and the interchange and the junction extracted in the above-described step 103 in the order closer to the vehicle position ( Step 104).
[0032]
Next, the guidance image processing unit 40 creates an expressway guidance image including facility names and the like necessary for specifying the selected facilities such as the plurality of service areas (step 105).
FIG. 4 is a diagram illustrating a specific example of an expressway guidance image. As shown in FIG. 4, the expressway guidance image G includes a road name display area a for displaying the name of the currently running expressway “Tohoku Expressway”, and a predetermined number (for example, three) in the order from the vehicle position. Facility name display areas s1, s2, and s3 for sequentially displaying the facility names and the like necessary for specifying the facility, and operation buttons b1 and b2.
[0033]
The three facility name display areas s1 to s3 have different display colors depending on the contents of the corresponding facility. For example, the color scheme is changed depending on whether the corresponding facility is a service area or a parking area, or an interchange or a junction, so that the nature of those facilities (whether or not they are rest facilities) can be understood at a glance. .
[0034]
Below each of the three facility name display areas s1, s2, and s3, the distance from the vehicle position to each facility and the time required to reach each facility are shown. These values are calculated based on the branch point of each facility. That is, when extracting the facilities, the service area and the parking rear are based on the merging point, but when calculating the distance and the required time to all the facilities including these, the branch point is used as the standard. .
[0035]
The "scroll" button b1 is for giving an instruction to sequentially switch the display contents of the three currently displayed facility name display areas s1 to s3. When the user directly presses the display portion of the "scroll" button b1 with the finger of the user using the remote control unit 4 or on a touch panel (not shown) attached to the display surface of the display device 6, the display target is displayed. The combination of the three facilities is shifted by one to the side farther from the vehicle position. Thereby, it is possible to confirm a service area, an interchange, and the like far from the own vehicle position.
[0036]
The “details” button b2 gives an instruction to display detailed information of a facility corresponding to the selected facility name display area when one of the facility name display areas is selected using the remote control unit 4 or the touch panel. It is for. When this button is pressed by the user, facility information drawing data including predetermined detailed information is created and displayed by the facility information drawing unit 32.
[0037]
Next, the drawing data of the expressway guidance image created by the guidance image processing unit 40 is input to the display processing unit 60, and the map image around the own vehicle position and this expressway guidance image are included in one screen in a divided display. Is performed by the display processing unit 60 (step 106).
[0038]
Next, the guidance image processing unit 40 determines whether or not various buttons (the “scroll” button b1 and the “details” button b2) in the expressway guidance image have been pressed (step 107). If none of the buttons has been pressed, a negative determination is made, and the process returns to step 100 to repeat the operation after the process of determining whether or not the vehicle is traveling on an expressway.
[0039]
If any of the buttons is pressed by the user, an affirmative determination is made in the determination of step 107, and processing corresponding to the pressed button is performed (step 108). The operation after the process of determining whether or not it is in the middle is repeated. For example, when the "scroll" button b1 is pressed, processing for updating the display contents of the three facility name display areas s1 to s3 is performed. When the "details" button b2 is pressed, facility information drawing data including facility detailed information corresponding to the facility name in the selected facility name display area s1 or the like is created by the facility information drawing unit 32. The detailed information is displayed on the display device 6 by the display processing unit 60. Thereafter, the process returns to step 100, and the operation after the process of determining whether or not the vehicle is traveling on the highway is repeated.
[0040]
5 to 8 are diagrams showing specific examples of display screens during driving on a highway. These figures show display examples when the vehicle is traveling near the “Moriya service area” of “Joban Road”, for example.
As shown in FIG. 5, when the vehicle is traveling at a predetermined distance (200 m) to the Moriya service area, the Moriya service area, the Yawahara interchange, and the Yatabe interchange are selected as three facilities close to the own vehicle position. Each facility name is shown in three facility name display areas s1 to s3. At this time, as described above, below the respective facility name display areas s1 to s3, the distance from the vehicle position to the branch point of each facility and the time required for each facility are displayed.
[0041]
When the vehicle further travels and reaches the branch point of the Moriya service area and the distance from the own vehicle position to this branch point becomes 0 km, as shown in FIG. 6, it is displayed below the facility name display area s1. The display of distance and required time disappears. Instead of erasing these displays, the distance “0 km” and the required time “0 minutes” may be displayed.
[0042]
When the vehicle enters the Moriya service area, as shown in FIG. 7, the highway guidance image is displayed while maintaining the contents of the facility name display area s1 and the display state of the distance and expected arrival time below it. Is
After that, when the vehicle exits the Moriya service area and passes the junction with the main line, as shown in FIG. 8, the content of "Moriya, SA" previously displayed in the facility name display area s1 disappears, Scroll processing of the display contents of the facility name display areas s1 to s3 is performed.
[0043]
FIG. 9 shows a case in which when the highway guidance image G shown in FIG. 7 is displayed, the lowermost facility name display area s1 included therein is selected and the “details” button b2 is pressed. It is a figure showing an example of a display. In the expressway guidance image G shown in FIG. 7, "Moriya, SA" is included in the facility name display area s1 at the bottom as a facility name or the like indicating the Moriya service area, and this facility name display area s1 is selected. When the "details" button b2 is pressed in the state of being turned, the facility information drawing section 32 creates facility information drawing data including detailed information on the Moriya service area. The display processing unit 60 displays a detailed information image on the screen based on the facility information drawing data as shown in FIG.
[0044]
As described above, when guiding the facility existing ahead of the vehicle position along the expressway, the display regarding the facility is performed until the vehicle position passes the merging point of the facility. The information about the in-use facility can be obtained because the display on the display remains without being deleted by the update. In particular, since information about these facilities is displayed even after the branch point for going to the service area or the parking area, information about these facilities can be obtained while using this facility.
[0045]
In addition, the distance to each facility included in the expressway guidance image uses the distance to the branching point that enters each facility, so, apart from whether or not the facility name is displayed, each facility is based on these distances. It is possible to determine the point where the vehicle enters.
In addition, since information about these facilities remains while using the service area and parking area, detailed information on these facilities can be displayed with simple operation, and complicated operation to obtain detailed information is unnecessary become.
[0046]
Note that the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, in the above-described embodiment, the display content of the facility name display area s1 at the bottom of the expressway guidance image is maintained from after passing the junction to the service area or the parking area until passing the junction. However, the display mode may be changed only during this time. For example, in the expressway guidance image G shown in FIG. 7, the lowermost facility name display area s1 is displayed by changing its color (in FIG. 7, hatching indicates a change in color. ). Accordingly, even if the vehicle is traveling on the main line after the branch point and the content display of "Moriya, SA" is maintained in the facility name display area s1 at the bottom, a new approach will be made from now on. We can know that it is facility which cannot do.
[0047]
Further, in the above-described embodiment, as shown in FIG. 3, a case has been described in which one branch road is formed which enters the service area (or parking area) in parallel with the main line and then returns to the main line again. However, the present invention can be applied to service areas and parking areas having other shapes.
[0048]
10 and 11 are diagrams showing modified shapes of the service area. The service area shown in FIG. 10 enters the service area from the branch point N1 of the main line, and then joins a general road via the junction N3 separately from the route returning to the main line via the junction N2 again. Have a route. In such a service area, the display contents of the facility name display areas s1 to s3 included in the expressway guidance image may be updated when the traveling position of the vehicle passes the junction N2 or the junction N3.
[0049]
Further, the service area shown in FIG. 11 enters the service area from the branch point N1 of the main line, and then returns to the main line of another highway via the junction N4 of another highway without returning to the main line of the same highway. Has a way out. In such a service area, the display contents of the facility name display areas s1 to s3 included in the expressway guidance image may be updated when the vehicle travels past the junction N4 of another expressway.
[0050]
As described above, the present invention can be applied to the shapes of the service area and the parking area other than the general shapes shown in FIG. 3 and the modified shapes shown in FIGS. 10 and 11. In other words, if the merging point to the main line or the general road is considered as the escape point of the facility, when passing through this escape point, if the content of each facility name display area of the expressway guidance image is updated, Good. Thus, the display of the facility name of the service area or the like can be reliably maintained until the user escapes from the service area or the like, and the detailed information of the facility can be easily operated (by simply pressing the “detail” button). Can be displayed.
[0051]
Further, in the above-described embodiment, the vehicle does not branch at the branch point to the service area or the like while traveling on the main line, and even if the vehicle is traveling on the main line directly after passing through the branch point, the high speed is maintained until the vehicle passes the junction. Although the display contents of the facility name display area in the road guidance image were not updated, if the vehicle is traveling on the main line after passing through a branch point, the service area and the like during this passage will not be used thereafter. In such a case, the display content of the facility name display area in the expressway guidance image may be updated when the vehicle passes the junction. The determination of whether the vehicle is traveling on the main line or entering the service area or the parking area after branching is performed by, for example, accurately detecting the traveling direction using a gyro or the like, or increasing the detection accuracy of the own vehicle position. Will be possible.
[0052]
Further, in the above-described embodiment, as shown in FIG. 4, each facility name display area s1 to s3 included in the expressway guidance image includes only information necessary for specifying the facility. A simple image such as an icon indicating the presence or absence of a restaurant, a toilet, a gas station, or the like included in the facility may be included. Thus, it is possible to know whether or not there is a restaurant or the like in this service area only by looking at these simplified images while the vehicle is parked in the parking lot of the service area.
[0053]
Further, in the above-described embodiment, first, a predetermined number of rest facilities such as service areas and parking areas are extracted (step 102 in FIG. 2), and then a predetermined number of facilities such as interchanges and junctions are extracted (FIG. 2). Step 103) After that, a predetermined number is selected from the plurality of extracted facilities (step 104 in FIG. 2). However, the reference points of the service area and the parking area are set to the merging point, The reference points of the interchange and the junction may be set as the branch points, and a predetermined number of facilities may be extracted in the order in which these reference points are closer to the own vehicle position. As a result, a plurality of facilities to be included in the intersection guidance image can be extracted by one extraction operation.
[0054]
【The invention's effect】
As described above, according to the present invention, when guiding a facility existing ahead of the own vehicle position along the highway, the own vehicle position passes through the junction where the branch road extending from the facility merges. Up to this point, the display on the facility is performed, so that the display on the facility before passing is not erased by the update and remains, and information on the facility in use can be obtained.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of a navigation device according to an embodiment.
FIG. 2 is a flowchart showing an operation procedure for displaying an expressway guidance image during traveling on the expressway.
FIG. 3 is a diagram showing a branch point and a merging point corresponding to a service area.
FIG. 4 is a diagram showing a specific example of an expressway guidance image.
FIG. 5 is a diagram showing a specific example of a display screen during driving on a highway.
FIG. 6 is a diagram showing a specific example of a display screen during driving on a highway.
FIG. 7 is a diagram showing a specific example of a display screen during driving on a highway.
FIG. 8 is a diagram showing a specific example of a display screen during driving on a highway.
FIG. 9 is a diagram showing a specific example of a display screen when display of detailed information is instructed during display of an expressway guidance image.
FIG. 10 is a diagram showing a deformed shape of a service area.
FIG. 11 is a diagram showing a deformed shape of a service area.
[Explanation of symbols]
1 Navigation controller
2 DVD
3 Disk reader
4 Remote control (remote control) unit
5 Vehicle position detector
6 Display device
7 Audio section
10 Map buffer
12 Map reading control unit
14 Map drawing unit
20 Vehicle position calculation unit
22 Route search processing unit
24 Guide route drawing unit
30 Facility Search Department
32 Facility information drawing unit
40 Guide image processing unit
50 Input processing unit
60 Display processing unit

Claims (9)

Traveling road determining means for determining that the vehicle is traveling on a highway;
When it is determined by the traveling road determination means that the vehicle is traveling on the expressway, a predetermined number of facilities along the expressway existing ahead of the vehicle position are selected in a descending order to identify these facilities. Guide image processing means for creating a possible guide image and updating a combination of the selected plurality of facilities when passing a junction where the branch road extending from the facility merges;
Display processing means for displaying the guidance image created and updated by the guidance image processing means on a display device,
A navigation device comprising: In claim 1,
Rest facilities are included in the plurality of facilities selected in accordance with the guide image,
The guide image processing means updates the content of the guide image when passing through the junction for the resting facility, and for facilities other than the resting facility, from the main line before the joining point to other than the resting facility. A navigation device that updates the content of the guide image when passing through a branch point entering the facility. In claim 2,
The rest apparatus includes a service area and a parking area. In claim 2,
A facility other than the rest facility includes an interchange and a junction. In claim 1,
The guidance image processing means may include, for a facility closest to the own vehicle position among the plurality of facilities selected in accordance with the guidance image, a branch point entering the facility from a main line and the merging point corresponding to the facility. A navigation device, wherein when the own vehicle position is included between the vehicle and a point, the guide image is created in a display mode that indicates that the vehicle is passing through the facility. In claim 1,
The guide image includes a distance from the own vehicle position to each of the plurality of facilities,
The navigation apparatus, wherein the guide image processing means uses a distance between a position of the vehicle and a branch point entering each facility from a main line as the distance. In any one of claims 1 to 6,
Instruction means for instructing the user to display detailed information of the plurality of facilities selected in accordance with the guidance image,
Facility information creating means for creating an image including the detailed information when display of the detailed information is instructed by the instruction means,
A navigation device, wherein the image created by the facility information creating means is displayed on the display device by the display processing means. In claim 1 or 2,
The navigation device is characterized in that the merging point is a point merging with a main line of an expressway. In claim 1 or 2,
The said junction is a point which joins a general road, The navigation apparatus characterized by the above-mentioned.

Images