JP3401966B2 - Route guidance device for vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle route guide device for displaying a route to a destination on a bird's-eye view road map to guide an occupant.

[0002]

2. Description of the Related Art A vehicle route guidance device is known in which a so-called bird's-eye view type road map is displayed on the display so that the road in the traveling direction is looked down from above the rear of the vehicle. For example, Japanese Patent Laid-Open No. 2-2
44188 gazette). In this type of vehicle route guidance device, an occupant is guided by displaying an optimal route to the destination and the current position of the vehicle on a bird's-eye view type road map centering on the traveling direction.

By the way, there are various traveling patterns on the way to the destination. For example, (1) Run an arbitrary route to the destination without displaying the optimum route. (2) A passenger departs from an optimal route or travels on a route different from the optimal route depending on the will of the passenger. (3) You miss the optimal route by mistakenly or missing the road. (4) Drive on the optimal route. For such various driving patterns, it is desirable to provide optimum road information for each driving pattern. For example, in the traveling pattern (1), it is basically desirable to display road information centered on the traveling direction of the vehicle. Further, in the traveling patterns of (2) and (3), it is desirable to display road information from the current location toward the destination. Further, in the traveling pattern of (4), it is desirable to display road information at a point on the optimum route that is a predetermined distance ahead.

However, in the conventional route guidance device for a vehicle, a bird's-eye view type road map is always drawn from the same viewpoint and line of sight no matter which traveling pattern the vehicle travels. There is a problem that information is not provided.

An object of the present invention is to provide optimum road information according to a driving pattern.

[0006]

In order to achieve the above-mentioned object, the invention of claim 1 is a route setting means for setting an optimum route to a destination, and a drawing for drawing a bird's-eye view road map on the display means. And a route guiding device for a vehicle, which is provided with the means. Then, the vehicle is provided with a route traveling determination means for determining whether the vehicle is traveling on the optimal route set by the route setting means or traveling outside the optimal route, and the route setting means is configured to perform the route traveling determination means by the route traveling determination means. When it is determined that the vehicle is traveling outside the optimum route, the optimum route from the current position to the destination is calculated and reset, and the drawing unit finishes the calculation of the optimum route by the route setting unit. Up to the drawing means draws a bird's-eye view road map toward the destination, and when the recalculation of the optimum route is completed, the display means displays a bird's-eye view road map in the direction of a predetermined distance ahead on the optimum route. draw. The invention of claim 2 is applied to a vehicular route guidance device including route setting means for setting an optimal route to a destination and drawing means for drawing a bird's-eye view road map on the display means. The route setting determining unit determines whether the vehicle is traveling on the optimum route set by the route setting unit or outside the optimum route. When it is determined that the vehicle is traveling outside the optimal route, a bird's-eye view road map is drawn so that the optimal route length to the destination including the destination is maximized. In the vehicle route guiding apparatus according to the third aspect, the drawing means draws a planar road map on the display means when a destination is input.

[0007]

According to the vehicle route guiding apparatus of claim 1, when it is determined that the vehicle is traveling outside the optimum route, the optimum route from the current position to the destination is calculated and reset, and the optimum route is calculated. A road map of a bird's-eye view method toward the destination is drawn until the process ends, and a bird's-eye view road map of a direction of a predetermined distance ahead on the optimum route is drawn when the recalculation of the optimum route is completed. In the vehicle route guidance device according to claim 2, when it is determined that the vehicle is traveling outside the optimum route, a bird's-eye view road map is set so that the optimum route length to the destination including the destination is maximized. draw. In the vehicle route guidance device according to the third aspect, the plane road map is drawn on the display means when the destination is input.

[0008]

FIG. 1 is a functional block diagram showing the structure of an embodiment. The vehicle route guidance device of this embodiment is mainly composed of a microcomputer. The azimuth sensor 1 detects the traveling direction of the vehicle, and the detected traveling direction information is A / D.
CPU 4 via converter 2 and interface circuit 3
Send to. The vehicle speed sensor 5 generates a pulse signal for each predetermined traveling distance of the vehicle, and C
Output to PU4. The CPU 4 counts the number of pulses of this pulse signal to detect the traveling distance of the vehicle. GPS
The receiver 6 is a receiver of a position detection system using a satellite, and sends information such as the current position of the vehicle and the traveling direction to the CPU 4 via the interface circuit 3. The key 7 is an operation member for setting a destination of the vehicle and the like, and is connected to the CPU 4 via the interface circuit 3.

The CD-ROM 8 is a storage device for storing road map data, is connected to the CPU 4 via the interface SCSI controller 9, and responds to a road map read command from the CPU 4 to store the road map data in the specified range. Send to. The display 10 for displaying the road map is CP via the graphic controller 11.
It is connected to U4 and displays the optimum route to the destination and the current position mark of the vehicle in a superimposed manner on the bird's eye view type road map.
The V-RAM 12 stores road map data of a bird's-eye view method and outputs it to the display 10 via the graphic controller 11 according to a display command from the CPU 4. Further, the CPU 4 has an RA for temporarily storing various data.
ROM 14 for storing M13 and a control program described later
Etc. are connected. The CPU 4 executes a processing program to be described later to calculate an optimum route from the current location to the destination, converts the two-dimensional plane road map data into bird's-eye view road map data, and converts the bird's-eye view road map to the vehicle's current location. And the optimum route to the destination is superimposed and displayed.

FIG. 2 is a perspective view of a display unit of one embodiment. On the front surface of the display unit 20 of the route guidance device for a vehicle, the above-described display 10, the joystick 71 included in the key 7, the bird view switch 72, the destination setting switch 73, and the destination erasing switch 74 are installed. When the joystick 71 is operated vertically and horizontally, the cross line on the display 10 moves in the operation direction. Further, when the joystick 71 is pulled toward you, it switches to a wide area road map, and when the joystick 71 is pushed in, it switches to a reduced map. When the joystick 71 is operated to move the cross line on the road map displayed on the display 10 to the destination and the destination setting switch 73 is pressed, the place on the road map indicated by the cross line is set as the destination RAM 13
Memorized in. When the destination erase switch 74 is pressed while the destination is set, the destination stored in the RAM 13 is erased and the destination setting is canceled. The bird view switch 72 is a switch for switching the display mode of the road map displayed on the display 10.

FIG. 3 shows the relationship between a two-dimensional plane road map and a bird's-eye view road map. A two-dimensional road map with east in the + X axis direction and north in the + Y axis direction, XY
Consider an XYZ three-dimensional coordinate system that is represented on a plane and the sky above the road on the XY plane is taken in the positive direction of the Z axis orthogonal to the XY plane. A viewpoint E (VX, VY, VZ) is set above the point which is a predetermined distance away from the current position of the vehicle, and the road map on the XY plane is looked down from this viewpoint E along the line of sight EF. To do. The angle formed by the line of sight EF and the XY plane is referred to as the looking down angle θ, and the angle formed by the straight line E′F obtained by projecting the line of sight EF on the XY plane and the + X axis is called the line of sight direction φ. Display 1 on a plane perpendicular to the line of sight EF
The display frame abcd of 0 is set, and the viewpoint E (VX, VY, V
When the road map on the XY plane is looked down from Z) through the display frame abcd, the road map in the trapezoidal ABCD range can be seen. This range ABCD is the display area of the road map. The line of sight EF is the display frame ab of the display 10.
If it is set to pass through the center of cd and look down at the vehicle, the current location of the vehicle is displayed at the center of the display frame abcd. In this case, the lower display frame abgh of the display 10 corresponds to the display area ABGH, and the road map of the narrow area ABGH is displayed in the lower display frame abgh. The upper display frame ghdc corresponds to the display area GHDC, and the road map of the wide area GHDC is displayed in the upper display frame ghdc. That is, the road map in the range close to the viewpoint E is enlarged and displayed, and the road map is reduced and displayed as the distance from the viewpoint E increases. The current location of the vehicle is F (CX, CY). Current location of this vehicle F
(CX, CY) is located at the center of the side GH.

4 and 5 are flowcharts showing a road map display program of one embodiment, FIG. 6 is a flowchart showing a destination setting routine, and FIG. 7 is a flowchart showing a destination erasing routine. The operation of one embodiment will be described with reference to these flowcharts. When the main switch (not shown) of the key 7 is turned on, the CPU 4 starts executing the control program shown in FIG. In step 100, the flag F indicating whether or not the optimum route is set is cleared. This flag F is set to 1 when the optimum route is set. In the following step 102, the current position and traveling direction of the vehicle are detected. The current position of the vehicle may be calculated by self-contained navigation or may be detected by GPS navigation. Also, both may be used in combination. The former calculates the traveling locus based on the traveling direction detected by the azimuth sensor 1 and the traveling distance measured by counting the pulse signals from the vehicle speed sensor 5, and specifies the current location by map matching.
The latter uses the current position and the traveling direction calculated by the GPS receiver 6.

At step 104, it is judged by the flag F whether or not the optimum route is set. If the optimum route is set at F = 1, the process proceeds to step 108 and the optimum route is set at F = 0. If not, the process proceeds to step 106.
When the optimum route is not set, in step 106,
In the line-of-sight direction φ, the traveling direction of the vehicle input in step 102 is set. On the other hand, when the optimum route is set,
In step 108, it is determined whether the vehicle is traveling on the optimum route or outside the optimum route. Optimal route is RAM as digital data composed of nodes and links
Since it is stored in 13, it suffices to calculate whether the current position coordinates of the vehicle are on any link or node coordinates on the optimum route. If the vehicle is traveling on the optimum route, the process proceeds to step 112, and if not, the process proceeds to step 110. When the vehicle is traveling on the optimum route, it is desirable to display the road information for a predetermined distance ahead on the optimum route. Therefore, in step 112, the direction of the point on the optimum route a predetermined distance Lm ahead from the current position is the line-of-sight direction. Set to φ. On the other hand, when the vehicle is traveling outside the optimum route, it is desirable to display road information in the direction from the current location to the destination, so the direction from the current location to the destination is set as the line-of-sight direction φ.

After the optimum direction according to the traveling pattern is set in the line-of-sight direction φ, the process proceeds to step 114 and the viewpoint E is calculated. As shown in FIG. 3, a display frame a of the display 10 is displayed.
If the current position of the vehicle is displayed at the center of bcd and the viewpoint height VZ and the looking-down angle θ are constant, the XY coordinate (V
X, VZ) is uniquely determined. Next, at step 116, the display area ABCD of the XY plane map coordinate system is calculated. FIG. 8 shows an XY plane at Z = 0 in the three-dimensional coordinate system shown in FIG. A projection point E ′ (VX, VY) of the viewpoint E (VX, VY, VZ) on the XY plane is calculated by the following equation.

[Equation 1] Even when the current position of the vehicle is displayed at a position other than the center of the display frame abcd, since the viewpoint height VZ and the line-of-sight direction φ are constant, the relative relationship between the viewpoint E and the display area ABCD is uniquely determined. The projection point E ′ can be calculated with a slight modification to Expression 1.

Here, the XY coordinate system shown in FIG.
The parallel movement is performed so that (VX, VY) becomes the origin, and the X'Y 'coordinate system is set as shown in FIG. Further, the X'Y 'coordinate system is rotated so that the line-of-sight direction is on the Y-axis to set the X "Y" coordinate system. As shown in FIG. 10, when the width of the display frame abcd of the display 10 is 1, the vertical width is S, the distance from the viewpoint E (VX, VY, VZ) to the display frame abcd is DS, and the line of sight is The angle formed by EF and the straight line Eg is defined as a half-spread angle α. XY shown in FIG.
The display area ABCD of the coordinate system corresponds to the display area A "B" C "D" of the X "Y" coordinate system shown in FIG. The coordinates of each vertex of the display area A "B" C "D" in this new X "Y" coordinate system are given by the following equations.

[Equation 2]

Next, the coordinates of each apex of the display area A'B'C'D 'in the X'Y' coordinate system considering the line-of-sight direction φ are obtained. Since the X'Y 'coordinate system is a rotation of the X "Y" coordinate system, the display area A "calculated by Equation 2
The coordinates of each vertex of B "C" D "are converted by rotating the coordinate axes.

[Equation 3] Further, each vertex of the display area in the XY coordinate system is calculated based on the calculated vertex coordinates of the display area A'B'C'D 'in the X'Y' coordinate system. Since the XY coordinate system is a translation of the X'Y 'coordinate system, Equation 3
The vertex coordinates of the display area A′B′C′D ′ calculated by the above are translated by VX in the X-axis direction and VY in the Y-axis direction for coordinate conversion.

[Equation 4]

Since the display area ABCD on the road map on the two-dimensional plane XY can be obtained, step 11
At 8, the road map data in the range including the display area ABCD is read from the road map data stored in the CD-ROM 8. For road map data, nationwide JIS-X04
Subdivision defined in 10 (hereinafter referred to as regional mesh)
The road map data is read from the CD-ROM 8 in units of regional meshes. In addition, the road map is dataized by the nodes that indicate the intersections, the poles, etc. of the roads and the links that connect the nodes, and together with the hierarchical level information based on the position coordinates of each node and each link and the road type. Remembered In addition to the road information described above, the road map data also includes the administrative world and its place names, railway and station names, major facilities, lakes,
Information such as landmarks is stored together with their position coordinates and hierarchical level information such as importance and display priority.

Next, in step 119, the CD-R
The XY plane road map data read from the OM 8 is coordinate-converted into bird's-eye view road map data to be displayed on the display 10. The coordinate conversion from the two-dimensional plane road map to the bird's-eye view road map will be described in detail later. In step 120, the bird's eye view road map data is transferred to the V-RAM 12 and displayed on the display 10 via the graphic controller 11. In step 122, a car mark indicating the current position of the vehicle is drawn by being superimposed on the bird's-eye view type road map being displayed. In step 124, it is determined whether or not the optimum route is set by the flag F. Only when the optimum route is set, the process proceeds to step 126, and the optimum route to the destination is displayed on the bird's-eye view road map. Draw on top of. Step 1
In step 30, it is determined whether or not the value of the flag F has been changed. If the value has been changed, the process returns to step 104 to repeat the above process, and if there is no change, the process proceeds to step 132. Step 1
In 32, it is determined whether the vehicle has moved a predetermined distance or has rotated a predetermined angle. If there is movement or rotation of the vehicle, the process returns to step 104 to repeat the above process,
Update the bird's eye view road map.

Next, the coordinate conversion from the plane road map data in the XY coordinate system to the bird's-eye view type road map data displayed on the display 10 will be described. FIG. 11 shows
The relationship between the EXEYEZ coordinate system with the viewpoint E (VX, VY, VZ) as the origin and the line of sight EF as the −Z axis, the SXSY display coordinate system with the center of the display frame abcd of the display 10 as the origin, and the display area ABCD. Indicates. Here, if the coordinates of the arbitrary road map data P in the XY coordinate system are (MX, MY), as shown in FIG. 9, the point E '(VX, VY) is moved in parallel so that it becomes the origin (X "Y" coordinate system) and X "Y" rotated so that the line of sight (E'F) overlaps the Y axis.
The coordinates (MX ", M) of the arbitrary data P in the coordinate system
Y ”) is

[Equation 5] Required by. Next, the coordinates (MX ", MY") of the data P in this X "Y" coordinate system are calculated by the following formula: EXEYEZ
Convert to the coordinates of the coordinate system (EX1, EY1, EZ1).

[Equation 6] It should be noted that when Equation 5 is substituted into Equation 6 and transformed, it is expressed as follows.

[Equation 7] Furthermore, the coordinates of the data P in the EXEYEZ coordinate system (EX
1, EY1, EZ1) is converted into coordinates (SX1, SY1) of the SXSY coordinate system by the following equation.

[Equation 8] SX1 = -DS * EX1 / EZ1, SY1 = -DS ・ EY1 / EZ1

Next, the destination setting and erasing operations will be described with reference to the flow charts of FIGS. When the destination setting switch 73 is operated, the CPU 4 executes a destination setting routine shown in FIG. In step 200, FIG.
As shown in, a two-dimensional plane road map is displayed on the display 10, and a guideline for a cross line and a destination setting operation is displayed. The road map when setting the destination may be a bird's-eye view road map. When the occupant operates the joystick 71 to move the crossline to the place of the destination and operates the destination setting switch 73 again, the XY coordinate is stored in the RAM 13 with the place of the crossline as the destination. In step 202, the current position of the vehicle is input from the GPS receiver 6, and in the following step 204, the optimum route from the current position to the destination is calculated by a known route search method. In step 206, the flag F is set to 1 and the destination setting process ends. On the other hand, when the destination deletion switch 74 is operated, the CPU 4 executes the destination deletion routine shown in FIG. In step 210, RAM1
The XY coordinates of the destination stored in 3 are deleted, and the flag F is reset.

When the state of the flag F changes in accordance with the operation of the destination setting switch 73 or the destination erasing switch 74, the road map display program shown in FIG. 4 is executed from step 104, and the line of sight according to the running pattern of the vehicle. The direction φ is reset, and a bird's-eye view road map centering on the line-of-sight direction φ is displayed. 13 to 15 show the display area ABCD of the XY plane map coordinate system selected according to the traveling pattern of the vehicle. The thick roads in the figure indicate the optimum routes. The optimal route to the destination is set,
When the vehicle is traveling on the optimum route, as shown in FIG. 13, the direction of a point on the route, which is a predetermined distance Lm away from the current position displayed by the car mark, is set to the line-of-sight direction φ, and the line-of-sight direction φ is set. A display area ABCD centered on is set, and the road condition Lm ahead from the current position on the optimum traveling route is displayed in the center of the display 10. After that, FIG.
As shown in, if you have to make a left turn at the fork and you make a mistake and go straight, you will be traveling out of the route, so set the direction from the current location to the destination in the line-of-sight direction φ, and display with the line-of-sight direction φ as the center. The area ABCD is set, and the road condition in the direction from the current position to the destination is displayed on the display 10.
However, as shown in FIG. 15, when the occupant operates the destination deletion switch 74 at the branch point and turns right to intentionally select a route different from the optimum route, the traveling direction of the vehicle is set to the line-of-sight direction φ, A display area ABCD centering on the line-of-sight direction φ is set, and the road condition in the traveling direction is displayed on the display 10.

In the above-described embodiment, when the vehicle is traveling outside the optimum route, the direction from the current position to the destination is set in the line-of-sight direction φ in step 110 of FIG. 4, but the current position is recognized when the traveling outside the route is recognized. To recalculate the optimal route from to
Until the calculation is completed, the direction from the current position to the destination is set to the line-of-sight direction φ for the time being, and when the calculation is completed, the direction of the point on the route that is a predetermined distance Lm away from the current position is the line-of-sight direction φ.
A modified example of the embodiment in which the setting is made will be described. Figure 1
6 is a flowchart showing the processing after step 108 of FIG. The process is the same as that shown in FIGS. 4 and 5 except for the case shown in FIG.
When it is determined in step 108 that the vehicle is not traveling on the optimum route, the optimum route from the current position of the vehicle to the destination is recalculated in step 302. In step 304, it is determined whether or not the calculation of the optimum route has been completed. If the calculation has not been completed, the process proceeds to step 110, and in the same way as when the vehicle is traveling on the optimum route, from the current position to the destination in the line-of-sight direction φ. Set the direction of. However, when the route calculation is completed, step 1
12, the direction of a point on the route that is a predetermined distance Lm away from the current position is set to the line-of-sight direction φ. In addition, the intentional travel of the vehicle outside the route may be emphasized, and the traveling direction of the vehicle may be set to the line-of-sight direction φ when traveling outside the route.

In step 110 of FIG. 4, the direction of the destination from the current position is set to the line-of-sight direction φ when traveling outside the route, but the line-of-sight direction φ is set so as to easily return to the optimum route. Good. FIG. 17 shows the display area ABCD in the XY plane map coordinate system. As mentioned above,
Since the current position of the vehicle (display position of the car mark) in the display frame abcd of the display 10 is fixed,
As shown in 7, the maximum field of view θmax seen from the current position of the vehicle
Is constant. By setting the destination and the line-of-sight direction φ so that the optimum route length from the destination is the longest within this maximum viewing angle θmax, it is easy to see which route from the current position can be used to return to the optimal route. Become. Therefore, in FIG.
As shown in 8, first, the direction θ0 from the current position to the destination
To calculate. Next, the azimuth θ1 to the first node N1 when traveling backward from the destination along the optimum route is calculated. Similarly, the azimuth θ2 to the next node N2 is calculated.
In this procedure, the directions θ3, θ4, ... To the nodes N3, N4, ... Are calculated in order, and if the angle between the right end direction including the destination and the left end direction is less than the above θmax. The direction of the node is calculated until it reaches the maximum. Then, an intermediate azimuth between the right end azimuth and the left end azimuth is set to the line-of-sight direction φ.
Set to. For example, in the example shown in FIG. 18, the right end azimuth θ4
And the left azimuth θ6 is smaller than the maximum viewing angle θmax, and if the angle between the right end azimuth θ4 and the left end azimuth θ7 exceeds θmax, the middle of the azimuth θ4 and the azimuth θ6. Azimuth is set to the line-of-sight direction φ. In this way, the optimum route from the destination can be displayed for the longest time, and it becomes easy to visually recognize what route from the current position to return to the optimum route.

In the above-mentioned embodiment, an example of calculating the optimum route to the destination by the known route search method is shown. However, a flat road map is displayed on the display 10 and the joystick 71 is used to move the cross line. The optimum route to the destination may be set manually.

In the configuration of the above embodiment, the display 10 constitutes display means, the CPU 4 constitutes route setting means, route traveling determination means and drawing means, and the GPS receiver 6 constitutes traveling direction detecting means.

[0026]

As described above, according to the invention of claim 1, when it is determined that the vehicle is traveling outside the optimum route, the optimum route from the current position to the destination is calculated and reset. , Draw a bird's-eye view road map in the direction of the destination until the calculation of the optimum route is completed, and draw a bird's-eye view road map in the direction of a predetermined distance ahead on the optimum route when the calculation of the optimum route is completed. As a result, even if the occupant makes a mistake on the road or stops at a place outside the optimum route, the optimum route is automatically reset, which improves operability and gives the occupant a sense of security. According to the invention of claim 2, when it is determined that the vehicle is traveling outside the optimum route, the bird's-eye view type road map is drawn so that the optimum route length to the destination including the destination is maximized. Since this is done, the optimum route from the destination is displayed for the longest time, and it becomes easier to visually recognize which route from the current position can be returned to the optimum route. According to the invention of claim 3, when the destination is input, the plane road map is drawn on the display means, so that the destination can be easily input without any discomfort.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing the configuration of an embodiment.

FIG. 2 is a perspective view of a display unit according to an embodiment.

FIG. 3 is a diagram showing a relationship between a two-dimensional plane road map and a bird's-eye view road map.

FIG. 4 is a flowchart showing a road map display program according to an embodiment.

FIG. 5 is a flowchart showing a road map display program of one embodiment following FIG.

FIG. 6 is a flowchart showing a destination setting routine.

FIG. 7 is a flowchart showing a destination deletion routine.

FIG. 8 is XY at Z = 0 in the three-dimensional coordinate system shown in FIG.
The figure which shows a plane.

9 is an X'Y 'coordinate system obtained by translating the XY two-dimensional plane map coordinate system shown in FIG. 8 so that the viewpoint is the origin, and X'Y rotated so that the line-of-sight direction overlaps the Y axis. "A diagram showing a coordinate system.

FIG. 10 is a diagram showing a relationship between a viewpoint E and a display frame abcd of a display.

FIG. 11: E with the viewpoint E as the origin and the line of sight EF as the −Z axis
The figure which shows the relationship between XEYEZ coordinate system, the SXSY display coordinate system which makes an origin the center of the display frame of a display, and display area ABCD.

FIG. 12 is a diagram showing an example of a destination setting screen on the display.

FIG. 13: X selected when traveling on the optimum route
The figure which shows the display area | region ABCD of a Y plane map coordinate system.

FIG. 14: X selected when traveling outside the optimum route
The figure which shows the display area | region ABCD of a Y plane map coordinate system.

FIG. 15: X selected when the optimum route is not set
The figure which shows the display area | region ABCD of a Y plane map coordinate system.

FIG. 16 is a flowchart showing a modified example of the above embodiment when traveling outside the optimum route.

FIG. 17 is a display area ABC in an XY plane map coordinate system.
The figure which shows D and the maximum viewing angle.

FIG. 18 is a diagram illustrating a method of determining a map display area when traveling outside the optimum route.

[Explanation of symbols]

1 Direction sensor 2 A / D converter 3 Interface circuit 4 CPU 5 vehicle speed sensor 6 GPS receiver 7 keys 8 CD-ROM 9 SCSI controller 10 display 11 Graphic controller 12 V-RAM 13 RAM 14 ROM

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01C 21/00-21/36 G06T 11/60 G08G 1/0969 G09B 29/00-29/10

Claims (3)

(57) [Claims] 1. A route setting for setting an optimum route to a destination
In a vehicle route guidance device comprising a setting means and a drawing means for drawing a bird's-eye view type road map on a display means, the vehicle is traveling on the optimum route set by the route setting means or outside the optimum route. A route traveling determination means for determining whether or not the vehicle is traveling is provided , and the route setting means includes the route traveling determination means.
When it is determined that you are driving outside the optimal route,
The optimal route from the location to the destination is calculated and reset, and the drawing means calculates the optimal route by the route setting means.
A bird's-eye view toward the destination on the display means until the calculation is completed
Method road map was drawn and the recalculation of the optimum route was completed.
From the display means to the point of a predetermined distance ahead on the optimum route
A route guidance device for vehicles that draws a bird's-eye view road map of directions . 2. A route setting for setting an optimum route to a destination
Setting means and drawing means for drawing a bird's-eye view road map on the display means
In a vehicle route guide device equipped with, the vehicle travels on the optimum route set by the route setting means.
Whether or not the vehicle is traveling outside the optimum route
The route traveling determination means is provided, and the drawing means performs the optimum operation by the route traveling determination means.
When it is determined that you are traveling outside the route, the destination
Bird's-eye view to maximize the optimal route length to the destination including
A route guidance device for vehicles, which draws a road map in a graphical format . 3. The vehicle route guiding apparatus according to claim 1, wherein the drawing unit is a plane on the display unit when a destination is input.
A route guidance device for vehicles that draws a road map .