JP3865988B2 - Navigation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a navigation apparatus for displaying map information around a vehicle position and setting a route connecting a departure point and a destination by route search.
[0002]
[Prior art]
In general, an in-vehicle navigation device detects a current position of a vehicle, reads map data in the vicinity thereof from a recording medium such as a DVD or a CD, and displays the data on a screen. In addition, a vehicle position mark indicating the vehicle position is displayed on the screen, and the map data in the vicinity of the vehicle position is scrolled with the progress of the vehicle so that the map information around the vehicle position is always known. It has become.
[0003]
Also, most of the recent in-vehicle navigation devices are equipped with a route guidance function that allows a user to travel to a desired destination without making a mistake on the road. According to this route guidance function, a route connecting from the departure point to the destination is automatically searched using map data by a simulation such as a horizontal search (BFS) method or Dijkstra method, and the searched route is stored as a guidance route. The And while driving, when the guidance route is drawn thickly on the map image with a different color from other roads and displayed on the screen, or when the vehicle approaches the intersection where the course should be changed within a certain distance, The user is guided to the destination by enlarging the intersection and displaying an arrow indicating the traveling direction.
[0004]
[Problems to be solved by the invention]
By the way, when driving according to the guidance route set by using the route guidance function described above, it was attempted to confirm information on the road shape and the surrounding facilities on the guidance device on the screen of the navigation device. In such a case, there is a problem that it takes a lot of time and troublesome operation. For example, when the user wants to check the road shape from the current vehicle position to the next intersection that is scheduled to turn or a building that serves as a landmark, the user operates the cursor keys provided on the operation unit, etc. The map information is scrolled until the next intersection is reached along the guidance route. At this time, in the case of a so-called heading-up display in which the map image is displayed so that the traveling direction of the vehicle is always directed to the upper side of the screen, basically, the map image is substantially moved to the guidance route by scrolling upward. However, when the road corresponding to the guidance route is gradually turning, the horizontal position of the road gradually shifts from the center of the screen. It is necessary to use the key operation together, and the operation is complicated. In addition, in the case of the so-called north-up display, where the map image is displayed so that the upper side of the screen is always north, the vertical direction of the screen and the direction of the road are almost the same. Since scrolling must be performed, the operation is further complicated. For this reason, it is not easy for the passenger in the passenger seat to accurately perform such scrolling work under the situation where the traveling vehicle vibrates.
[0005]
The present invention was created in view of the above points, and an object of the present invention is to provide a navigation device that can reduce complicated operations when confirming a guide route and map information around the guide route. It is in.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problem, the navigation device according to the present invention, when a guidance route is searched for by a route search means according to a predetermined search condition, is detected by the vehicle position movement means along the searched guidance route. The vehicle position is moved, and map information of a predetermined range around the vehicle position is displayed by the map display means with reference to the vehicle position. As described above, by moving the vehicle position along the guide route by the vehicle position moving means, the map information around the guide route can be displayed. Therefore, an operation for manually scrolling the displayed map information is performed. This is unnecessary, and it is possible to reduce troublesome operations when confirming the guide route and the map information around it.
[0007]
Further, the vehicle position moving means described above is set as a moving section for moving the vehicle position to an intersection where the vehicle turns next along the guidance route so that the time required for moving the moving section is substantially constant. It is desirable to set the moving speed. Generally, when a user confirms the guidance route and its surrounding map information, it is often sufficient to acquire information up to the next intersection where the vehicle turns. By setting as a moving section for moving the vehicle position up to a turning intersection, it is not necessary to perform an operation for setting the moving section, and more complicated operations can be reduced. In addition, by setting the moving speed so that the time for moving the vehicle position in the moving section described above is almost constant, the vehicle position can always be moved within a fixed time regardless of the distance of the moving section. Can be terminated. Also, it is possible to roughly know whether the distance to the next turning intersection is long or short based on the moving speed of the vehicle position.
[0008]
Moreover, it is desirable to further include a movement stop means for stopping the movement of the vehicle position described above in response to a user operation. While the map information around the guidance route is being displayed, the map information around the location where the vehicle is actually traveling will not be displayed. The display of the map image around the position where the vehicle is actually traveling can be restored.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a navigation device according to an embodiment to which the present invention is applied will be described with reference to the drawings.
[0010]
(1) Overall configuration of navigation device
FIG. 1 is a diagram showing an overall configuration of an in-vehicle navigation device according to an embodiment to which the present invention is applied. The navigation device shown in FIG. 1 includes a navigation controller 1 that controls the whole, a DVD 2 that records various map data necessary for map display, route search, and the like, and a disk reader 3 that reads the map data recorded on the DVD 2. A remote control (remote control) unit 4 as an operation unit for a user to input various instructions, a GPS receiver 5 and an autonomous navigation sensor 6 for detecting a vehicle position and a vehicle direction, a map image, and A display device 7 for displaying a guidance route, a vehicle position mark, and the like is provided.
[0011]
The disk reader 3 described above can be loaded with one or more DVDs 2 and reads map data from any of the DVDs 2 under the control of the navigation controller 1. The loaded disc is not necessarily a DVD but may be a CD. Further, both DVD and CD may be selectively loaded.
[0012]
The remote control unit 4 includes a search key for giving a route search instruction, a route guidance mode key used for setting a route guidance mode, a destination input key, left / right / up / down cursor keys, a map scale / enlarge key, and a cursor on the display screen. Various operation keys such as a setting key for determining an item at a position are provided, and an infrared signal corresponding to the operation state of the key is transmitted to the navigation controller 1. The remote control unit 4 of the present embodiment also includes an “automatic scroll key” that gives an instruction to automatically scroll a map image up to an intersection where the vehicle turns next along the guidance route during route guidance. .
[0013]
The GPS receiver 5 receives radio waves transmitted from a plurality of GPS satellites and performs a three-dimensional positioning process or a two-dimensional positioning process to calculate the absolute position and direction of the vehicle (the vehicle direction is the current vehicle position). And the vehicle position before one sampling time ΔT), and these are output together with the positioning time. The autonomous navigation sensor 6 includes an angle sensor such as a vibration gyro that detects the vehicle rotation angle as a relative direction, and a distance sensor that outputs one pulse for each predetermined travel distance. Detect orientation.
[0014]
Based on the image data output from the navigation controller 1, the display device 7 displays a map image around the host vehicle together with a departure point mark, a destination mark, and the like, or displays a guidance route on the map.
[0015]
(2) Detailed contents of map data
Next, detailed contents of the map data recorded on the DVD 2 will be described. The map data recorded on the DVD 2 is in units of rectangular shape leaves separated by a predetermined longitude and latitude, and the map data of each leaf is specified and read by designating the leaf number. It becomes possible. The map data for each map leaf includes (1) a drawing unit composed of various data necessary for map display, and (2) data necessary for various processing such as map matching, route search, and route guidance. Road unit and (3) an intersection unit made up of detailed data such as an intersection.
[0016]
In the road unit described above, a line connecting a certain intersection on the road and another adjacent intersection is called a link, and an intersection connecting two or more links is called a node. FIG. 2 is a diagram showing the contents of various tables included in the road unit. As shown in FIG. 2, the road unit includes a unit header for identifying the road unit, a connection node table storing detailed data of all nodes, and a node table indicating the storage position of the connection node table; And a link table storing detailed data of links specified by two adjacent nodes.
[0017]
FIG. 3 is a diagram illustrating detailed contents of various tables included in the road unit. As shown in FIG. 3A, the node table stores node records # 0, # 1,... Corresponding to all the nodes included in the drawing of interest. Each node record is given a node number from # 0 in the order of arrangement, and indicates the storage position of the connection node table corresponding to each node.
[0018]
In addition, as shown in FIG. 3B, the connection node table is provided for each existing node.
a. Normalized longitude / latitude
b. Intersection node flag indicating whether or not this node is an intersection node, adjacent node flag indicating whether or not the node is at the boundary with another figure, whether or not the link is branched at this node, branch If so, a “node attribute flag” including branching path information indicating whether the shape of the branch corresponds to a T-junction or a Y-junction,
c. "Number of connected nodes", which indicates the number of nodes that make up the other end of each link when there is a link with this node as one end of the link,
d. If the link connected to this node has traffic restrictions such as right turn prohibition or U turn prohibition, the "number of traffic restrictions"
e. Connection node records for the number of links indicating the link number of each link where this node is one end,
f. A traffic regulation record showing the specific contents of the traffic regulation corresponding to the number of traffic regulations mentioned above,
g. If this node is a node at the boundary with another leaf, an “adjacent node record” indicating the position of the connection node table of the corresponding node in the adjacent leaf,
h. If this node is an intersection node, the storage location and size of the corresponding intersection record in the intersection unit;
Etc. are included.
[0019]
Further, as shown in FIG. 3C, the link table includes a plurality of link records in the order of link numbers corresponding to all the links included in the drawing of interest. Each of these link records
a. Link ID, which is a code attached to each link mainly for the search route display,
b. Node number 1 and node number 2 identifying two nodes located at both ends of the link,
c. Link distance
d. Cost of traveling on this link
e. Various road attribute flags including road attribute information attached to this link (whether there is one-way traffic, whether this road is subject to search processing, etc.)
f. A road type flag indicating the road width such as whether the actual road corresponding to this link is a highway or a general road, how many meters the road is wide,
g. The number given to the road corresponding to this link,
Etc. are included.
[0020]
(3) Detailed configuration and operation of the navigation controller
Next, a detailed configuration of the navigation controller 1 shown in FIG. 1 will be described. The navigation controller 1 includes a data buffer 10 for displaying a predetermined map image or the like on the display device 7, a map reading control unit 12, a map drawing unit 14, a VRAM 16, a reading control unit 18, an image composition unit 20, a vehicle position moving unit. 22, vehicle position calculation unit 30 for performing vehicle position calculation, map matching processing, route search processing, route guidance processing and displaying the result, route guidance processing unit 32, guidance route memory 34, guidance route drawing unit 36, a mark image drawing unit 38, a remote control unit 60 for displaying various operation screens for the user and transmitting operation instructions from the remote control unit 4 to each unit, a cursor position calculation unit 62, an operation screen generation unit 64, It has.
[0021]
The data buffer 10 is for temporarily storing map data read from the DVD 2 by the disk reader 3. When the vehicle position is calculated by the vehicle position calculation unit 30, the map reading control unit 12 sends a request for reading a predetermined range of map data including the vehicle position to the disk reading device 3, and obtains map data necessary for map display. Read from the DVD 2 and store in the data buffer 10. For example, map data corresponding to four map leaves including the vehicle position is read and stored in the data buffer 10.
[0022]
The map drawing unit 14 creates map image data necessary for displaying a map image around the vehicle position based on the map data stored in the data buffer 10. The map image data created by the map drawing unit 14 is stored in the VRAM 16, and the map image data for one screen is read by the read control unit 18. The image composition unit 20 performs image composition by superimposing the image data output from each of the mark image drawing unit 38 and the operation screen generation unit 64 on the read map image data. The image synthesized by the image synthesis unit 20 is displayed on the screen of the display device 7.
[0023]
FIG. 4 is a diagram showing the relationship between the map image data stored in the VRAM 16 and the display image read by the read control unit 18. In FIG. 4, each of regions A to D is a map image created based on the map data of the four leaves read out from the data buffer 10, and the map image data of these four leaves is stored in the VRAM 16. Is done. The region P is a predetermined region set based on the vehicle position G. In actual display, a map image corresponding to the region P is read by the read control unit 18 and is passed through the image composition unit 20. It is displayed on the screen of the display device 7. In this way, the screen is scrolled by moving the region P with the movement of the vehicle position G due to the traveling of the host vehicle. When the region P moves with the movement of the vehicle position G, map data corresponding to a new map leaf is read out and stored in the data buffer 10 as necessary.
[0024]
FIG. 5 is a diagram illustrating a state where the screen is scrolled as the region P moves as the vehicle position G moves. In FIG. 5, the arrow drawn on the left side of the vehicle position G indicates the traveling direction of the own vehicle. When the navigation apparatus of the present embodiment scrolls the map image with the movement of the vehicle position G at the time of route guidance or the like, as shown in FIG. 5, the traveling direction of the own vehicle always faces the upper side of the screen. The area P is set and the map image is displayed.
[0025]
The vehicle position moving unit 22 follows the guidance route set in advance by the route guidance processing unit 32 in order to automatically scroll the map image when the automatic scroll key provided in the remote control unit 4 described above is pressed. The vehicle position is virtually moved, the moving vehicle position is sequentially calculated and output to the readout control unit 18, and includes a movement section setting unit 24.
[0026]
The movement section setting unit 24 sets a movement section when the vehicle position movement unit 22 virtually moves the vehicle position on the guidance route. In the present embodiment, on the guidance route, a section from the current vehicle position to the intersection where the vehicle turns next is called a movement section. The movement section setting unit 24 obtains data related to the guidance route from the route guidance processing unit 32, obtains vehicle position and traveling direction data from the vehicle position calculation unit 30, and reads the map data (road unit or the like) read from the data buffer 10. ) And the movement section is set based on these data. Details of the method of setting the movement section will be described later.
[0027]
When a predetermined movement section is set by the movement section setting section 24, the vehicle position movement section 22 moves the vehicle position along the movement section, sequentially calculates the moving vehicle position, and reads out the calculation result. Output to the control unit 18. The map image corresponding to the vehicle position calculated by the vehicle position moving unit 22 is read from the VRAM 16 by the read control unit 18 and displayed on the screen of the display device 7, whereby the map image is automatically scrolled.
[0028]
FIG. 6 is a diagram illustrating a state in which the map image is automatically scrolled based on the vehicle position calculated by the vehicle position moving unit 22. In FIG. 6, the vehicle position G corresponds to the current position of the host vehicle, and the host vehicle is traveling in the direction indicated by the arrow on the right side of the vehicle position G (upward in the drawing). Assume that you plan to make a left turn at Q. That is, the intersection Q is an intersection where the vehicle turns next, and corresponds to a movement section in which a route from the vehicle position G to the intersection Q is set by the movement section setting unit 24. When the vehicle travels in this moving section, the vehicle position is continuously calculated by the vehicle position moving unit 22, and the map image is automatically scrolled by reading the corresponding map image. In the present embodiment, when automatic scrolling is performed, the so-called heading-up display in which the traveling direction of the vehicle is always directed upward is not performed, and the region P corresponding to the current vehicle position G is moved to the vehicle position. A map image is displayed by parallel movement. Specifically, as shown in FIG. 6, when the vehicle position moves from G,... G ′,... G ″ with the current vehicle position G as a starting point, the area corresponding to these vehicle positions is P,. P ′,... P ″ are translated.
[0029]
In the conventional navigation apparatus, when the map image is to be scrolled along the guidance route in this way, the map image is manually displayed by pressing the left / right / up / down cursor keys provided on the remote control unit 4. Although the operation was very complicated because it had to be scrolled, in this embodiment, when the automatic scroll key provided in the remote control unit 4 is pressed, the map image is automatically scrolled as described above. Therefore, it is possible to reduce troublesome operations when confirming the guide route and the map information around it. The details of the operation procedure when the map image is automatically scrolled will be described later.
[0030]
The vehicle position calculation unit 30 calculates the vehicle position based on the detection data of the GPS receiver 5 and the autonomous navigation sensor 6, and if the calculated vehicle position is not on the road of the map data, the vehicle position is calculated. Perform map matching processing to correct. The route guidance processing unit 32 searches for a guidance route that connects a preset destination and departure place under a predetermined condition. For example, a guide route with the minimum cost is set under various conditions such as the shortest distance and the shortest time. As a typical method of route search, Dijkstra method and horizontal search method are known. The guidance route set by the route guidance processing unit 32 in this way is stored in the guidance route memory 34.
[0031]
FIG. 7 is a diagram illustrating an example of data stored in the guide route memory 34. As shown in FIG. 7, the guidance route data set by the route guidance processing unit 32 is expressed as a set NS, N1, N2,..., ND of intersection nodes from the departure point to the destination, and is stored in the guidance route memory 34. Stored.
[0032]
The guide route drawing unit 36 selects, from the guide route data stored in the guide route memory 34, the one included in the map area drawn in the VRAM 16 at that time, and selects the guide route that is thickly emphasized over the map image. draw. The mark image drawing unit 38 generates a vehicle position mark at the vehicle position after the map matching process, or generates a cursor mark having a predetermined shape.
[0033]
The map drawing unit 14, the VRAM 16, the read control unit 18, the image composition unit 20, and the display device 7 described above are used as map display means, the route guidance processing unit 32 as search search means, and the vehicle position moving unit 22 as vehicle position moving means. The remote control unit 4 and the remote control unit 60 correspond to movement stop means, respectively.
[0034]
The entire navigation device and the navigation controller 1 have the above-described configuration. Next, when the route is guided, the automatic scrolling of the map image performed when the automatic scroll key provided in the remote control unit 4 is pressed. The operation will be described.
[0035]
FIG. 8 is a flowchart showing an operation procedure of the navigation device when the map image is automatically scrolled. It is assumed that a predetermined route guidance operation is performed, for example, a map image or a guidance route around the host vehicle is displayed on the screen of the display device 7.
[0036]
In parallel with the route guidance operation, the vehicle position moving unit 22 determines whether or not an instruction to start automatic scrolling is issued by pressing an automatic scroll key provided in the remote control unit 4 (step 100). . While the automatic scroll start instruction is not given, a negative determination is made in step 100, and a standby state is entered. When an instruction to start automatic scrolling is given, the moving section setting unit 24 in the vehicle position moving unit 22 sets a predetermined moving section along the guidance route (step 101).
[0037]
Here, the method for setting the movement section in step 101 will be specifically described. FIG. 9 is a diagram for explaining a method of setting a movement section. In FIG. 9, the links corresponding to the roads are represented by “straight lines”, and the nodes connecting the links are represented by “◯”. Further, if the own vehicle is traveling from the vehicle position G toward the node N1 and turns left at the node N4 and goes to the node N5, the node N4 corresponds to the intersection where the own vehicle turns next. The route specified by N1 to N4 corresponds to the movement section. In this case, the vehicle position G can be acquired from the vehicle position calculation unit 30. Further, the nodes N1 to N5 corresponding to the guidance route can be acquired from the route guidance processing unit 32. Therefore, if the node N4 corresponding to the intersection where the vehicle turns next is obtained, the moving section can be specified. Next, a method for obtaining a node corresponding to the intersection where the vehicle turns next will be described.
[0038]
By referring to the connection node table corresponding to each node, the link number of each link having this node as one end is extracted, and referring to the link table based on each link number, the node number of the other end of each link is obtained. Extract. In this way, when the node number of the other end of each link is known, the direction of this link can be calculated based on the normalized longitude and latitude of the node of interest and the other end node, respectively. . Therefore, in the example shown in FIG. 9 described above, the node corresponding to the intersection where the vehicle turns next is calculated from the result of calculating the direction of the link connecting the node N3 and the node N4 and the direction of the link connecting the node N4 and the node N5. Can be determined to be the node N4.
[0039]
As described above, when the moving section is set, the vehicle position moving unit 22 sets a moving speed for virtually moving the vehicle position along the moving section (step 102). In the present embodiment, the moving speed is set so that the time required for the vehicle position to move in the moving section is substantially constant regardless of the length of the moving section. Therefore, the vehicle position moving unit 22 examines the distance of the link corresponding to the moving section, and sets the moving speed by dividing this distance by the moving time.
[0040]
When the moving section and the moving speed are set, the vehicle position moving unit 22 sequentially calculates the vehicle position when the vehicle position is moved based on the moving section and the moving speed, and the calculation result is read out by the reading control unit 18. Output to. A map image corresponding to the vehicle position calculated by the vehicle position moving unit 22 is read from the VRAM 16 by the reading control unit 18 and displayed on the screen of the display device 7, whereby automatic scrolling of the map image is started. (Step 103).
[0041]
Next, the vehicle position moving unit 22 determines whether or not an instruction to stop automatic scrolling has been given by pressing a predetermined operation key provided in the remote control unit 4 (step 104). If an instruction is given to stop the automatic scroll, an affirmative determination is made in step 104, and the vehicle position moving unit 22 stops the automatic scroll operation by stopping the calculation of the vehicle position (step 105).
[0042]
If no instruction is given to stop the automatic scrolling (No determination in step 104), the vehicle position moving unit 22 completes the calculation of the vehicle position within the set moving section, and thereby performs the scroll operation. It is determined whether or not the process has ended (step 106). If the scrolling operation has not ended, the process returns to the above-described step 104, and the operations after the determination as to whether or not an instruction to stop automatic scrolling has been given are repeated.
[0043]
In addition, when the scroll operation is finished, the vehicle position moving unit 22 determines again whether or not the automatic scroll key of the remote control unit 4 is pressed and an instruction to start automatic scrolling is given (step 107). When an instruction to start automatic scrolling is given, the vehicle position moving unit 22 returns to step 101 described above and repeats the operation after the setting of the moving section. In this case, the vehicle position moving unit 22 uses the end point of the moving section set in the previous automatic scroll operation (the intersection corresponding to the node N4 in the example shown in FIG. 9) as a new starting point. Set up. Thus, in this embodiment, when an affirmative determination is made in step 107 and the process returns to step 101, the moving section is set with the end point of the moving section set in the previous automatic scroll operation as a new start point. Therefore, not only the route to the intersection where the vehicle turns next, but also the route to the intersection where the vehicle turns second, third,... Is continuously set as the moving section, and the map image is scrolled. You can also.
[0044]
Further, in the above-described step 107, when the automatic scroll start instruction is not given (when a negative determination is made), the vehicle position moving unit 22 determines whether or not a predetermined time (for example, 5 seconds) has elapsed. Determination is made (step 108). If the predetermined time has not elapsed, the process returns to step 107, and the operations after the determination of whether or not an automatic scroll start instruction has been issued are repeated. Therefore, if an automatic scroll start instruction is not issued in step 107, a map image around the intersection where the vehicle turns next (the end point of the moving section) is displayed until a predetermined time has elapsed. .
[0045]
When a predetermined time has elapsed after the scroll operation is finished (when an affirmative determination is made in step 108), or when the automatic scroll stop operation is performed in step 105 described above, the vehicle position moving unit 22 is Then, the read control unit 18 is instructed to return to the normal route guidance screen. Upon receiving the instruction, the read control unit 18 reads the map image data stored in the VRAM 16 based on the calculation result by the vehicle position calculation unit 30 and displays a normal route guidance screen (step 109). Thereafter, the vehicle position moving unit 22 returns to Step 100 and repeats the operations after the determination whether or not the automatic scroll start instruction is given.
[0046]
As described above, in the navigation device of the present embodiment, the section between the current vehicle position and the next intersection where the vehicle turns next is set as the movement section along the guidance route searched in advance by the route guidance processing unit 32. The And, by automatically moving the vehicle position along this movement section, automatic scrolling of the map image along the guidance route is performed, so there is no need to operate the cursor keys and the like in a conventional manner, It is possible to reduce troublesome operations when confirming the guide route and map information around it. Further, in the above-described embodiment, the moving speed is set so that the time required for the movement of the moving section is substantially constant by setting a moving section for moving the vehicle position up to the intersection where the vehicle turns next along the guidance route. Therefore, there is no need to perform an operation to set the movement section, and more complicated operations can be reduced, and the vehicle position is always within a certain time regardless of the distance of the movement section. The movement can be terminated.
[0047]
In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above-described embodiment, an instruction to start automatic scrolling of the map image is given by pressing the automatic scroll key provided in the remote control unit 4, but this automatic scroll start instruction is performed using the cursor key. You may do it. In this case, whether or not to automatically scroll the map image can be set in advance, and when the automatic scrolling is set and the route guidance is performed, a predetermined cursor key ( For example, the automatic scrolling of the map image may be started by pressing the “upward” cursor key).
[0048]
Further, in the above-described embodiment, when an instruction to start automatic scrolling is given, the movement section is always set as the movement section from the current vehicle position to the intersection where the vehicle turns next. Is not limited to the next intersection where the vehicle turns, for example, until the second, third, or subsequent intersection, to the destination, or a predetermined distance from the vehicle position ( For example, various setting methods are conceivable, such as until 1 km ahead or until a point where the vehicle is expected to reach after a predetermined time (for example, after 5 minutes). Further, an enlarged view of this intersection may be displayed after the automatic scrolling of the map image up to the intersection where the vehicle turns next is completed.
[0049]
In this way, with regard to operation variations when performing automatic scrolling of map images, such as the method of setting the moving section and whether to display an enlarged view of the intersection, the user can display the option setting screen etc. It only has to be settable. FIG. 10 is a diagram illustrating an example of an option setting screen regarding the automatic scrolling operation of the map image. As shown in FIG. 10, as conditions for automatic scrolling, whether to display an enlarged view of an intersection, setting of a movement section (up to the next intersection, to the destination, and others (detailed settings)) are prepared. The user can set these conditions by operating the remote control unit 4. In addition, an “OK” button is prepared at the lower right of the screen, and when this button is selected, the setting related to automatic scrolling is completed.
[0050]
FIG. 11 is an example of a screen displayed when other (detailed settings) is selected in the setting of the movement section shown in FIG. 10 described above. As shown in FIG. 11, there are three moving section setting conditions, “Set for each intersection”, “Set by distance”, and “Set by time”, and the user operates the remote control unit 4. These conditions can be set. For example, when setting for each intersection, after selecting the “set for each intersection” button, it is only necessary to select the number of intersections to be used as the moving section. In addition, a “return to previous screen” button is prepared in the lower right of the screen, and when this button is selected, the screen returns to the screen shown in FIG. 10 described above.
[0051]
In this way, by displaying the option setting screens as shown in FIGS. 10 and 11, whether the user performs the moving section setting method or the enlarged view display of the intersection when the map image is automatically scrolled. Whether or not can be set to a desired condition.
[0052]
【The invention's effect】
As described above, according to the present invention, the map information around the guidance route can be displayed by moving the vehicle position along the guidance route searched in advance. The operation of scrolling in the work is unnecessary, and the complicated operation when confirming the guide route and the map information around it can be reduced.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an overall configuration of an in-vehicle navigation device according to an embodiment.
FIG. 2 is a diagram showing the contents of various tables included in a road unit.
FIG. 3 is a diagram showing detailed contents of various tables included in a road unit.
FIG. 4 is a diagram illustrating a relationship between map image data stored in a VRAM and a display image read by a read control unit.
FIG. 5 is a diagram for explaining a state in which a screen is scrolled as a region P moves as the vehicle position G moves.
FIG. 6 is a diagram illustrating a state in which a map image is automatically scrolled based on a vehicle position calculated by a vehicle position moving unit.
FIG. 7 is a diagram illustrating an example of data stored in a guide route memory.
FIG. 8 is a flowchart showing an operation procedure of the navigation device when automatic scrolling of a map image is performed.
FIG. 9 is a diagram illustrating a method for setting a movement section.
FIG. 10 is a diagram illustrating an example of an option setting screen related to an automatic scroll operation of a map image.
11 is a diagram showing an example of a screen displayed when other (detailed setting) is selected in the setting of the movement section shown in FIG.
[Explanation of symbols]
1 Navigation controller
4 Remote control unit
7 Display device
10 Data buffer
12 Map readout controller
14 Map drawing part
16 VRAM
18 Read controller
20 Image composition part
22 Vehicle position moving part
24 Moving section setting section
30 Vehicle position calculator
32 Route guidance processing unit
34 Guide route memory
60 Remote control unit
62 Cursor position calculator
64 Operation screen generator

Claims (2)

Map display means for displaying map information of a predetermined range around the vehicle position as a reference;
Route search means for searching for a guided route according to a predetermined search condition;
The vehicle position is moved along the guidance route set by the route search means, and the vehicle position is set as a movement interval for moving the vehicle position to the next turn along the guidance route. Vehicle position moving means for setting the moving speed so that the time required for movement is substantially constant ;
A navigation device comprising: In claim 1,
A navigation apparatus , further comprising movement stop means for stopping movement of the vehicle position in response to a user operation .

Images