JP2004085229A - Navigation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To show in what direction current road traffic conditions is changing, based on the road traffic information received. <P>SOLUTION: A main control section 107 decides whether road traffic information is for a section related to a guidance path defined in a parameter memory 106, by referring to map data when the storage of new received road traffic information into a VICS information memory 109 is notified from a VICS reception processing section 108. When the section related to the guidance path, road traffic information that is received this time for the same traffic event as the road traffic information being received this time is searched from the VICS information memory 109. Then, a VICS information display window 551 is set onto the display screen of a display 6, thus displaying a content 552 in the road traffic information received this time and a content 553 in the road traffic information received last time. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technique for presenting road traffic information received by a receiver to a user in a navigation device.
[0002]
[Prior art]
As a technique for presenting road traffic information such as traffic congestion in a navigation device, for example, a technology is described in Japanese Patent Application Laid-Open Nos. 8-63094 and 2001-124577, which is received via a VICS (Vehicle Information and Communication System). A technique for displaying a graphic representing a congested section on a map based on the road traffic information and a technique for displaying the contents of the received road traffic information by text when the road traffic information is received are known.
[0003]
[Problems to be solved by the invention]
According to the conventional technology for presenting the received road traffic information to the user, the user can know the current road traffic condition such as traffic jam from the display of the navigation device. I can't tell if it's changing.
[0004]
For example, according to the conventional technology, when the navigation device receives road traffic information indicating that a traffic jam of 10 km has occurred in a specific section, the navigation apparatus displays the information to that effect. It can be recognized that a traffic jam of 10 km has occurred. However, the user cannot know whether the traffic congestion in this section tends to be eliminated or increased. Then, for this purpose, when the user actually arrives at the section, the user predicts the degree of traffic congestion from the current traffic congestion increase / decrease trend, and according to the predicted traffic congestion degree. You cannot select a route. That is, for example, it is not possible to select a route such that the vehicle travels in the section if the traffic congestion tends to be resolved, and runs away from the section if the traffic congestion increases.
[0005]
Therefore, an object of the present invention is to provide a navigation device capable of presenting in which direction a current road traffic condition is changing based on received road traffic information.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a navigation device that receives road traffic information and displays a road traffic condition indicated by the received road traffic information; a receiving unit that receives the road traffic information; A road traffic information memory for storing the received road traffic information, and when the road traffic information is received, the road traffic information received in the past, which targets the same section or point as the road traffic information received by the receiving means. A search means for searching from the road traffic information memory, and a road traffic condition indicated by the road traffic information searched by the search means, together with a road traffic condition indicated by the road traffic information received by the reception means; The road traffic information received by the receiving means obtained from the road traffic condition indicated by the obtained road traffic information and the road traffic information searched by the searching means is targeted. It is obtained by a road traffic information display means for displaying the change in conditions between or points of road traffic conditions.
[0007]
According to such a navigation device, when the road traffic information is received, when the received road traffic information is presented to the user with the previously received road traffic information for the same section or point as the received road traffic information, In addition to the current road traffic conditions, the user may change the road traffic conditions in any direction based on the changes in the road traffic conditions indicated by the currently received road traffic information and the previously received road traffic information. You will be able to know what is going on. In addition, when the road traffic information is received, when the received road traffic information and the received road traffic information are presented to the user with the change state of the road traffic situation obtained from the previously received road traffic information for the same section or point. In this case, the user can directly know in what direction the road traffic situation is currently changing from the presentation of the change situation.
[0008]
Here, in the case where the above navigation device has a guidance route setting means for setting a guidance route which is a route to a destination, and a guidance means for guiding a user's traveling according to the set guidance route, The search by the search means and the display of the road traffic information by the road traffic information display means may be performed only when the road traffic information for the section or the point on the guide route is received.
[0009]
In this way, the above-described road traffic information can be presented only for the section or point where the user is going to travel.
In the search by the search means, only the most recently received road traffic information among the previously received road traffic information targeting the same section or point as the received road traffic information is searched from the road traffic information memory. You may make it.
Here, the present invention also provides a navigation device that receives road traffic information and displays a road traffic condition indicated by the received road traffic information, and a receiving unit that receives the road traffic information. A road traffic information memory that stores received road traffic information, a section selection receiving unit that receives a selection of a section or a point from a user, and a section that receives the selection when the section selection receiving unit receives a selection of a section. Or a search means for searching for road traffic information from the road traffic information memory for a point, and the latest road traffic condition of a selected section or point indicated by the road traffic information searched by the search means. A road traffic condition that is earlier than the latest road traffic condition of the selected section or point indicated by the road traffic information searched by the means, or the search means It is constructed by a road traffic information display means for displaying the change status of the searched road traffic information obtained from the selected section or point of road traffic conditions.
[0010]
According to such a navigation device, for a section or a point selected by the user, the latest road traffic state of the section or the point, a road traffic state in the past or a change state of the road traffic state are presented to the user. Is done.
Therefore, the user can know, in a desired section or point, what direction the road traffic condition is currently changing, together with the latest road traffic condition.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
FIG. 1 shows the configuration of the navigation device according to the first embodiment.
As shown in the figure, the navigation device includes a control device 1, a recording medium drive 2 for accessing a storage medium 21 such as a DVD-ROM or a hard disk storing map data, a GPS (Global Positioning System) receiver 3, The vehicle includes a running state sensor 4 such as an acceleration sensor and a vehicle speed sensor for detecting a running state of the vehicle, a remote controller 5 (remote controller) for receiving an input from a user, a display device 6, and a VICS receiver 7.
[0012]
Further, the control device 1 includes a map data buffer 101, a map data read processing unit 102, a current position calculation unit 103, a route search unit 104, a navigation image generation unit 105, a parameter memory 106, a main control unit 107, a VICS reception processing unit. 108, a VICS information memory 109, a VICS image generation unit 110, and a GUI control unit 111. Here, a dotted line 121 inside the control device 1 in FIG. 1 indicates an access route of each unit to the map data stored in the map data buffer 101, and a bold line 122 indicates a route of control information between the main control unit 107 and each unit. The white line 123 indicates an access path of each unit to various data stored in the parameter memory 106 and the VICS information memory 109, and the thin line connecting to the GUI control unit 111 indicates the remote controller 5 and the display device 6 with the user. Shows the path of operation information and image information to be input / output using.
[0013]
However, the above control device 1 may be a CPU circuit having a general configuration including hardware such as a microprocessor, a memory, and other peripheral devices such as a graphic processor and a geometric processor in terms of hardware. In this case, each unit of the control device 1 described above may be realized as a process embodied by the microprocessor executing a prepared program. In this case, such a program may be provided to the control device 1 via the storage medium 21 or a communication path.
[0014]
Next, the configuration of map data stored in the storage medium 21 will be described.
Here, the map data is managed in units called maps for each predetermined geographical area, and each map is composed of a plurality of levels according to the level of detail of the map. The map at each level of each leaf is composed of one or a plurality of units, and each unit corresponds to the geographical area of the leaf to which it belongs, or an area obtained by dividing the geographical area, and maps the corresponding area. , At the level to which it belongs.
[0015]
Then, as shown in FIG. 2, the map data includes management data describing the relationship between each unit and a figure, a corresponding area, and a level, basic map data representing a map, route data, and VICS broadcast station information. It consists of.
Here, the basic map data includes the above-described unit data for each unit, and unit management data describing the relationship between each unit data and the figure, the corresponding area, and the level. Each unit data includes a road unit representing a road network, a drawing unit representing a background map image which is a map image including a display of a topographical figure, a facility figure, a region name, a facility name, and the like, and road traffic information by characters. And a VICS unit, which defines a section or a section name as a unit for presenting a.
[0016]
The road unit has a node list, a link table, and connection data describing the connection and correspondence of nodes and links with other units.
Here, in the road unit, the road is represented as a set of links that are straight lines, and the end point of each link is a node. Such a node is always provided at a connection point of a road such as an intersection, and is always provided at a boundary between adjacent units. Each link has a direction, and two links in mutually opposite directions are basically provided between two nodes adjacent to each other via the link.
[0017]
The node list includes a node record for each node. Each node record includes a node number, node coordinates, a node attribute indicating whether the node is a node corresponding to an intersection or a tollgate, and a connection to the node. A connection link number list, which is a list of link numbers of links to be connected, and an adjacent node number list, which is a list of node numbers of nodes adjacent to the node via the link, are described.
[0018]
Next, the link table includes a link record for each link. Each link record includes a link number, a node number 1 which is a node number of a node serving as a start point of the link, and a node number of a node serving as an end point of the link. A certain node number 2, a road type indicating a type of a road including a link, such as a toll road, a national road, a link distance, a link direction, a link cost as a route search cost given to the link, A route number and the like are described.
[0019]
On the other hand, the section unit has a section record provided for each section which is a unit for presenting road traffic information in characters, and each section record includes a section name (for example, “National Route 135”) that is the name of the section. Odawara-Atami ") and a corresponding link list which is a list of link numbers of the links included in the section.
[0020]
The VICS unit has a VICS link identifier, which is an identifier of a VICS link used to indicate a road section in the VICS, and corresponding link information indicating a range of links in the road unit corresponding to the VICS link having the VICS link identifier. Is described.
[0021]
The route data included in the map data has a route record provided for each road, and the route record includes a route number, which is an identifier of the road, and a toll road, a national road, a prefectural road, etc. of each road. The route type and the route name of each road are described.
The VICS broadcast station information included in the map data describes the broadcast frequency of the broadcast station that broadcasts the VICS information in each region.
Next, parameters stored in the parameter memory 106 of the control device 1 of FIG. 1 will be described.
As shown in FIG. 3, the parameter memory 106 stores current state information 301, destination data 302, and guidance route data 303.
The current state information 301 includes current position data 3011, current driving direction data 3012, and running link data 3013. The current position data 3011 is data representing the current position coordinates of the vehicle. And the traveling link data 3013 is data indicating the link number of the currently traveling link.
[0022]
The destination data 302 represents the coordinates of the destination on the link.
The guide route data 303 is data representing a guide route, and describes a route link list 3031 in which link numbers of links through which the guide route passes are described in order of passing, and a node number of a node in which the guide route passes through in order of passing. And a root node list 3032.
[0023]
The contents of the parameter memory 106 have been described above.
Next, data stored in the VICS information memory 109 of the control device 1 of FIG. 1 will be described.
Here, the VICS (Vehicle Information and Communication System) is a system for transmitting and receiving real-time traffic information about every five minutes. The type of road traffic information that can be received by the VICS receiver 7 includes traffic congestion (section, Types), accidents (locations), and temporary regulations (sections / locations, contents). There are three levels of the contents of the road traffic information, and among them, only the level 3 road traffic information is accompanied by information capable of specifying a road section / point targeted by the road traffic information on a map. The road traffic information is received via a radio beacon receiver, an optical beacon receiver, and an FM multiplex broadcast receiver included in the VICS receiver 7.
[0024]
In the present embodiment, the road traffic information is presented to the user using the level 3 road traffic information. The level 3 road traffic information includes the above-mentioned VICS link number, the range information on the target VICS link representing the road section targeted by the road traffic information, the type of the road traffic information, and the detailed contents of the road traffic information. Contains some detailed information.
[0025]
Now, as shown in FIG. 4, the VICS information memory 109 stores a VICS information record 401 provided for each road traffic information received by the VICS receiver 7.
Each VICS information record 401 includes a VICS information number serving as an identifier of the VICS information record 401, a reception time of the road traffic information, the information type and detailed information included in the received road traffic information, and a range on the target VICS link. Stores information.
[0026]
Further, the VICS information memory 109 stores target VICS link range information indicating the range included in the section for each section that has received the road traffic information including the target VICS link range information indicating the range included in the section. The section information management record 410 provided corresponding to each information type included in the included road traffic information is stored.
[0027]
Each section information management record 410 includes a section information number which is an identifier of the section information management record 410, a target section indicating a section record of the corresponding section, a corresponding information type, and other sections corresponding to the corresponding section. It has a related section information number which is a section information number of the information management record 410, and a VICS information list. The VICS information list includes a reception information record 411 provided for each piece of road traffic information including target VICS link range information indicating a range included in the section and a corresponding information type. Each VICS information record 401 describes the reception time of the corresponding road traffic information and the detailed information included in the road traffic information.
[0028]
Returning to FIG. 1, in such a configuration, under the control of the main control unit 107, the map data reading processing unit 102 reads out a required range of the map data from the storage medium 21 via the recording medium drive 2 and reads the map data. The data is stored in the buffer 101.
In addition, the current position calculation unit 103 performs map matching of the current position estimated from the output of the traveling state sensor 4 and the GPS receiver 3 with a map around the previously determined current position read from the map data buffer 101. After processing, the position on the link that is most likely to be the current position, the link direction that is most likely to be the current traveling direction, and the link that is most likely to be the currently traveling link are respectively represented by the current position coordinates, The running direction and the running link are determined, and the process of updating the current position data 3011, the current running direction data 3012, and the running link data 3013 in the parameter memory 106 is repeated.
[0029]
On the other hand, when the main control unit 107 receives a destination setting from the user via the remote controller 5 and the GUI control unit 111, the main control unit 107 sets the destination in the destination data 302 and causes the route searching unit 104 to search for a guidance route. The route searching unit 104 reads road data of a road unit in a necessary geographical range from the map data buffer 101, and performs processing from the current position coordinates indicated by the current position data 3011 of the parameter memory 106 to the destination coordinates indicated by the destination data 302. A guide route that first follows the link indicated by the traveling link data 3013 is calculated based on a predetermined cost model using the link cost of the link record, and the calculated route data of the guide route is calculated using the route link of the guide route data 303. The information is stored in the list 3031 and the root node list 3032, respectively.
[0030]
On the other hand, the VICS information reception processing unit obtains the current position from the current position data 3011 in the parameter memory 106, refers to the VICS broadcasting station information in the map data, and reads the road traffic from the FM multiplex broadcasting station that can be received at the current position. The VICS receiver 7 is controlled to receive the information, and the road traffic information received by the VICS receiver 7 is stored in the VICS information memory 401 in the form of a VICS information record 401 in which the reception time and the VICS information number are added to the road traffic information. A process for registering the VICS information record 109 in the VICS information memory 109 and deleting the VICS information record 401 that is no longer valid from the VICS information memory 109 is performed.
[0031]
Further, the main control unit 107 repeats the following navigation image generation processing.
That is, the main control unit 107 determines the direction corresponding to the traveling direction indicated by the traveling direction data as the display direction, determines the scale according to the user setting or initial setting made in advance, and reads out the scale from the current position data 3011. A predetermined range around the current position, which is determined according to the determined display orientation, the determined scale, and the operation mode, is determined as the display range. Here, the display direction is calculated, for example, so that the traveling direction is always upward.
[0032]
Then, based on the road unit and the drawing unit in the display range, the navigation image generation unit 105 sets the direction indicated by the display direction to the top and sets the road figure of the road network represented by the road unit on the background map image represented by the drawing unit. Is generated. When the guide route data 303 is set, the main control unit 107 instructs the navigation image generation unit 105 to display a guide route on the destination side from the current position indicated by the guide route data 303 in the display range. A guide route graphic represented on the map image and a current position mark directed to a position corresponding to the current position indicated by the current position data 3011 in a direction corresponding to the direction indicated by the current traveling direction data 3012 are drawn on the map image. To generate a navigation image. Also, based on the VICS information record 401 in the VICS information memory 109, the VICS image generation unit 110 displays a VICS figure such as a section where traffic congestion or temporary regulation exists or an accident mark indicating an accident on the navigation image. A VICS graphic image to be displayed is generated. Here, the VICS image generation unit 110 converts the range or position on the VICS link indicated by the target VICS link range information of each VICS information record 401 into the range or position on the road unit link with reference to the VICS unit. Based on the obtained range and position on the link, and the display range and display orientation, the position for drawing a graphic or mark corresponding to the information type of the VICS information record 401 is determined.
[0033]
Then, the main control unit 107 causes the GUI control unit 111 to combine the navigation image and the VICS information graphic image, and causes the display device 6 to display the combined image. FIG. 5A shows a screen displayed in this manner, in which a current position mark 502 and a guidance route figure 503 are displayed with a map image 501 as a background. In the figure, reference numeral 511 denotes a VICS figure displayed on the side of a road portion corresponding to the link range obtained by converting the link range information on the target VICS in order to indicate a congested section by the VICS image generation unit 110, and 512 denotes a VICS In order for the image generation unit 110 to represent an accident, a VICS figure which is an accident mark displayed at a position on the road corresponding to the position on the link obtained by converting the link range information on the target VICS, and 513 is a VICS image generation unit A VICS figure 110 is a construction-in-progress mark displayed at a position on the road corresponding to the position on the link obtained by converting the target VICS link range information in order to represent the temporary regulation by the work.
[0034]
If the guidance route data 303 is not set, only the current position mark 502 is drawn on the map image 501 to be a navigation image, and is combined with the VICS information graphic image and displayed on the display device 6. become.
When the VICS information record 401 is newly registered in the VICS information memory 109 as described above, the VICS information reception processing unit notifies the main control unit 107 of the new registration of the VICS information record 401.
Then, the main control unit 107 that has received the notification performs the section traffic information display processing shown in FIG. 6 every time the notification is received.
As shown in the section traffic information display processing, first, a VICS information record 401 registered in the VICS information memory 109 is extracted (step 602). Then, a link or a set of road units including a range or a position on the VICS link indicated by the target VICS range information of the extracted VICS information record 401 is obtained by referring to the VICS unit, and the obtained link or set of links is obtained. (Step 604).
[0035]
Then, it is determined whether or not the section information management record 410 in which the target section indicating the searched section record is described and the same information type as the extracted VICS information record 401 is described in the VICS information memory 109. A check is made (step 606), and if there is, the process proceeds directly to step 608.
[0036]
On the other hand, if there is no such section information management record 410, a section indicating the section record searched in step 60 and a section information management record describing the same information type as the information type of the extracted VICS information record 401 410 is created on the VICS information memory 109 (step 620). Then, it is checked whether there is another section information management record 410 having the same target section as the created section information management record 410 and describing an information type different from the information type of the extracted VICS information record 401 (step 622). If not, go to step 608. On the other hand, when the section information management record 410 exists, the section information number of the other section information management record 410 existing in the created section information management record 410 is described as the related section information number, and the section information number is created in the existing section information management record 410. After the section information number of the section information management record 410 described above is described as the related section information number (step 624), the process proceeds to step 608.
[0037]
In step 608, the target section indicating the section record searched in step 604 is described, and the section information management record 410 in which the same information type as the extracted VICS information record 401 is described, that is, step 606 Describes the reception time and the detailed information described in the extracted VICS information record 401 in the VICS information list of the section information management record 410 (hereinafter, referred to as “target management record”) that has been searched for in step 620. The received reception information record 411 is added.
[0038]
Next, it is checked whether or not the link included in the route link list 3031 of the guide route data 303 exists in the corresponding link list of the section record searched in step 604 (step 610), and if not, the process ends. On the other hand, if it exists, the related information is extracted from the section information management record 410 having the section information number described in the related section information number of the target management record (step 612). This related information will be described later.
[0039]
Then, from the target management record and the section record indicated by the target section described in the target management record, the current section indicated by the reception information record 411 added in step 608 of the section of the section record indicated by the target section of the target management record Create current traffic condition information indicating the traffic condition. Also, the information of the reception information record 411 having the second latest reception time (added immediately before the reception information record 411 registered in step 608) in the VICS information list of the target management record is referred to as the previous traffic condition information. Extract as The source traffic state information and the previous traffic state information will be described later.
[0040]
Next, a VICS information display window 551 as shown in FIG. 5B is displayed on the display device 6, and the current traffic state information 552, the previous traffic state information 553, and the related information 554 are displayed on the VICS information display window 551. .
Then, it waits for a predetermined time to elapse (step 616), deletes the VICS information display window 551, and ends the processing.
Here, the above-described traffic condition information, previous traffic condition information, and related information will be described.
As shown in the current traffic condition information display 552 in FIG. 5B, the current traffic condition information indicates the reception time of the reception information record 411 added in step 608 and the section record indicated by the target section described in the target management record. The information includes the section name, the information type (for example, congestion) described in the target management record, and the detailed information (for example, congestion distance) of the reception information record 411 added in step 608.
[0041]
On the other hand, as shown in the previous traffic condition information display 553 of FIG. 5B, the previous traffic condition information is the second most recent reception time in the VICS information list of the target management record (the reception information record 411 registered in step 608). The reception time and the detailed information (for example, traffic congestion distance) of the reception information record 411 (added immediately before) are included.
[0042]
The related information includes information type and VICS information from another section information management record 410 (hereinafter, referred to as “related management record”) having a section information number described in the related section information number of the target management record. The reception information record 411 having the latest reception time registered in the list is extracted. Then, the extracted reception time indicates whether the road traffic information corresponding to the reception information record 411 is still valid, that is, the extracted reception time is within a first predetermined time from the current time (for example, 7 minutes). Find out if you are in the past. Then, if the road traffic information corresponding to the reception information record 411 is still valid, the extracted reception time, the information type, and the detailed information are directly related as shown in the related information display 554 of FIG. 5B. Information. As a result, for example, if the event indicated by the information type is a lane regulation due to a traffic accident, the effect of the lane regulation due to the traffic accident is indicated by the extracted reception time, that is, the time when the road traffic information indicating the lane regulation is received, and the related information. Will be displayed as
On the other hand, if the road traffic information corresponding to the reception information record 411 is not already valid and is within the second predetermined time (for example, 20 minutes) from the current time, the extracted reception time and the information type The information indicating that the event indicated by is resolved is defined as related information. As a result, for example, if the event indicated by the information type is a lane regulation due to a traffic accident, the fact that the lane regulation has been resolved is extracted together with the extracted reception time, that is, the time at which the last road traffic information indicating the lane regulation was received, It will be displayed as related information.
The embodiments of the present invention have been described above.
[0043]
As described above, according to the present embodiment, when the road traffic information is received, the previously received road traffic information for the same section and the same information type as the received road traffic information is presented to the user together with the received road traffic information. The user can know not only the current road traffic condition but also the current direction of the road traffic condition by comparing the previous and current road traffic information.
[0044]
Further, according to the present embodiment, when the road traffic information is received, the situation of the traffic event indicated by the other information type obtained from the road information of the other information type previously received in the same section as the received road traffic information Is also presented to the user, so that it is possible to determine in what direction the current road traffic situation is changing by referring to the relation with the road traffic information of other information types. . For example, if the related information indicates that a traffic accident has occurred recently, the current traffic congestion distance indicated by the road traffic information received this time will be further increased in the future. Can be predicted and if the related information mentioned above indicates that the traffic accident has recently been resolved, the current traffic congestion distance indicated by the road traffic information received this time will be resolved in the future. It can be expected.
[0045]
By the way, in the above, when the road traffic information is received, the previously received road traffic information for the same section and the same information type as this time is displayed together with the received road traffic information. At the time of reception, a change (for example, a difference in congestion distance) between the traffic condition indicated by the previously received road traffic information and the traffic condition indicated by the currently received road information for the same section and the same information type as this time is calculated. Alternatively, the calculated change may be displayed together with the received road traffic information.
[0046]
Further, in the above description, the road traffic information is displayed only for the section at least partially overlapping with the guidance route. However, this is performed, for example, in response to the user's selection of the above-mentioned VICS graphic, Road traffic information may be displayed for the corresponding section information management record 410. In this case, the reception information record 411 having the latest reception time registered in the VICS information list of the section information management record 410 corresponding to the selected VICS figure is regarded as the road traffic information received this time, and The road traffic condition indicated by the road traffic information is displayed, and the same section as the road traffic information, the road traffic condition indicated by the road traffic information received immediately before for the same information type, and the same section as the road traffic information are displayed first. The traffic situation of the traffic event indicated by the other information type obtained from the received traffic information of the other information type may be displayed.
[0047]
In the above description, the road traffic information is displayed using the VICS level 3 road traffic information. However, the road traffic information is displayed using the other level traffic information such as level 1. It may be. Also, in this case, when the received road traffic information indicates the section targeted by the road traffic information, as described above, the road traffic information is targeted from the VICS link targeted by the road traffic information. Instead of searching for a section to be performed, a section indicated in the received road traffic information may be directly used as a section targeted by the road traffic information.
[0048]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a navigation device capable of presenting in which direction the current road traffic condition is changing based on the received road traffic information. .
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a navigation device according to an embodiment of the present invention.
FIG. 2 is a diagram showing contents of map data according to the embodiment of the present invention.
FIG. 3 is a diagram showing contents of data stored in a parameter memory according to the embodiment of the present invention.
FIG. 4 is a diagram showing contents of data stored in a VICS information memory according to the embodiment of the present invention.
FIG. 5 is a diagram showing an example of a display screen of the navigation device according to the embodiment of the present invention.
FIG. 6 is a flowchart illustrating a procedure of a section traffic information display process according to the embodiment of the present invention.
[Explanation of symbols]
1: control device, 2: recording medium drive, 4: running state sensor, 5: remote control, 6: display device, 7: VICS receiver, 21: storage medium, 101: map data buffer, 102: map data read processing unit , 103: current position calculation unit, 104: route search unit, 105: navigation image generation unit, 106: parameter memory, 107: main control unit, 108: VICS reception processing unit, 109: VICS information memory, 110: VICS image Generation unit 111: GUI control unit.

Claims (6)

A navigation device that receives road traffic information and displays a road traffic condition indicated by the received road traffic information,
Receiving means for receiving the road traffic information;
A road traffic information memory storing the road traffic information received by the receiving means,
When the receiving unit receives the road traffic information, the search unit searches for the previously received road traffic information from the road traffic information memory, targeting the same section or point as the received road traffic information,
Along with the road traffic condition indicated by the road traffic information received by the receiving unit, the road traffic condition indicated by the road traffic information searched by the searching unit, or the road traffic condition indicated by the road traffic information received by the receiving unit and the search And a road traffic information display unit for displaying a change state of a road traffic condition of a section or a point targeted by the road traffic information received by the receiving unit, obtained from the road traffic information searched by the unit. . A navigation device that receives road traffic information and displays a road traffic condition indicated by the received road traffic information,
Guidance route setting means for setting a guidance route that is a route to a destination;
Guidance means for guiding the user's travel according to the set guidance route;
Receiving means for receiving the road traffic information;
A road traffic information memory storing the road traffic information received by the receiving means,
When the receiving means receives the road traffic information for the section or point on the guidance route, the receiver receives the previously received road traffic information for the same section or point as the received road traffic information. A search means for searching from the traffic information memory;
When the receiving unit receives the road traffic information for the section on the guidance route, the road traffic information indicated by the searching unit indicates the road traffic condition indicated by the road traffic information received by the receiving unit. Road traffic conditions, or roads in sections or points targeted by the road traffic information received by the receiving means, which are obtained from the road traffic conditions indicated by the road traffic information received by the receiving means and the road traffic information searched by the searching means. A road traffic information display unit for displaying a change state of a traffic condition. The navigation device according to claim 1 or 3,
In the search, the search means targets the most recently received road traffic information among the previously received road traffic information, targeting the same section or point as the road traffic information received by the reception means, in the road traffic information. A navigation device for searching from a memory. A navigation device that receives road traffic information and displays a road traffic condition indicated by the received road traffic information,
Receiving means for receiving the road traffic information;
A road traffic information memory for storing the received road traffic information,
Section selection receiving means for receiving a section or point selection from the user;
When the section selection receiving unit receives a selection of a section, a search unit that searches for road traffic information from the road traffic information memory, targeting a section or a point where the selection is received,
Along with the latest road traffic condition of the selected section or point indicated by the road traffic information searched by the search unit, the latest road traffic condition of the selected section or point indicated by the road traffic information searched by the search unit is past. And a road traffic information display means for displaying a change state of the road traffic situation of the selected section or point obtained from the road traffic information searched by the search means or the road traffic information searched by the search means. In a navigation device, a road traffic information display method for displaying a road traffic condition indicated by the received road traffic information,
Receiving road traffic information;
Storing the received road traffic information;
When receiving the road traffic information, searching for the same section or point as the received road traffic information, from among the road traffic information stored in the past received road traffic information,
Along with the road traffic condition indicated by the received road traffic information, the road traffic condition indicated by the searched road traffic information, or the received road traffic information obtained from the road traffic condition indicated by the received road traffic information and the searched road traffic information is applicable. Displaying a change state of a road traffic condition in a section or a point to be displayed. A computer program read and executed by a computer,
To the computer,
Receiving road traffic information;
Storing the received road traffic information;
When receiving the road traffic information, searching for the same section or point as the received road traffic information, from among the road traffic information stored in the past received road traffic information,
Along with the road traffic condition indicated by the received road traffic information, the road traffic condition indicated by the searched road traffic information, or the received road traffic information obtained from the road traffic condition indicated by the received road traffic information and the searched road traffic information is applicable. Displaying a change state of the road traffic condition of the section or point to be executed.

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