JPH05232867A - Navigation device - Google Patents

Abstract

PURPOSE:To improve the visibility of a screen by displaying a travel schedule course by rotation, movement, and reduction so that the start point and destina tion are arranged at specific positions on a display at all times. CONSTITUTION:This navigation device is equipped with a setting means which sets the travel schedule course including the start point and destination, an LCD display unit 19 as the display which has the rectangular screen, and a display control means 18 which displays the travel schedule course by rotation, movement, and reduction so that the start point and destination are arranged at the specific positions on the LCD display unit 19 at all times. The LCD display unit 19 displays guidance information (destination azimuth, destination remaining distance, travel track, etc.) and current place information (map book position, travel track, etc.) on a moving body. Namely, the travel schedule course have coordinates converted and coordinate conversion is performed by rotation, movement, and reduction to display the start position and destination at the specific positions on the screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device for providing a driver with necessary information on a vehicle.

[0002]

2. Description of the Related Art Conventionally, various navigation devices have been developed which automatically measure the current position and perform distance, direction, route guidance, etc. to a destination or waypoint. In JP-A-58-26214, a planned traveling course is set in advance, and the planned traveling course, traveling locus, traveling distance, and course change information are displayed on the screen.

[0003]

However, when displaying a planned traveling course on a rectangular display, the course is usually set while looking at a map prepared separately. The orientation on the map is constant, and the upward direction is usually set to north. As described in Japanese Patent Application Laid-Open No. 58-26214, the start point may be located in the lower right corner of the map and the destination may be located in the upper right corner of the map, but this is not necessarily the case for all the planned running courses. .. In addition, the distance between the start point and the destination also changes each time the planned running course is set. Therefore, the planned traveling course may be biased toward the corner of the screen, may extend in the direction of the short side of the screen, and inefficient display may occur. In order to avoid this, the user has to rotate the map and set the planned course while calculating the scale, which is very troublesome.

Therefore, in the present invention, it is an object of the present invention to always display the start point and the destination at a fixed position on the screen when displaying the planned traveling course.

[0005]

Means used in the present invention for solving the above-mentioned problems include a setting means for setting a planned traveling course including a start point and a destination, a display having a rectangular screen, and a start. It is provided with display control means for rotating, moving and changing the scale of the planned traveling course so as to always display the point and the destination at a specific position on the display and displaying the course on the display.

[0006]

According to the above means, the planned traveling course is coordinate-converted, rotated, moved, and scale-converted to be coordinate-converted, and the start point and the destination are displayed at specific positions on the screen.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

In the present embodiment, as shown in FIG. 1, a navigation device 10 mounted on an automobile comprises a map book 33, a route guide device 12, a GPS antenna 11, a distance sensor 16 and a direction sensor 17. There is. The map book 33 has a plurality of pages in which a map divided into a plurality of vertical and horizontal frames is described. The route guide device 12 is provided on a vehicle that is a moving body. A distance sensor 16 and a direction sensor 17 are connected to the route guide device 12. Also, the root guide device has a G
G for PS (Global Positioning System) reception
The PS antenna 11 is connected. The route guide device 12 includes an LCD display device 19 which is a display, calculates a current position in accordance with information from a sensor or an antenna, and, as described later, a book number, a page number of a map book corresponding to the current position. It is configured to be able to display a frame number, a traveling locus on the frame, and the like. A sheet 34 formed of a transparent plate having a size corresponding to a frame is used by being superposed on the map of the map book 33 on the map of the map book 33. On the sheet 34, horizontal and vertical grids are printed so as to further divide the frames. The user prepares the map book of the number displayed on the display of the route guide device 12, opens the displayed page, and displays the sheet 34 on the displayed frame number.
By overlapping, it is possible to judge by matching the points on the display with the points on the map.

As shown in FIGS. 2 and 3, the route guide device 12 has an opening / closing switch 20a, a voice key 20b, a VICS key 20c, a locus key 20d, and a track key 20d on a case 12a.
Destination direction key 20e, 8 number switches 20f-2
0m, page key 20n, frame key 20o, frame position key 20p, voice memo key 20q, four cursor keys 20r to 20u, current position key 20v, GPS clock key 2
0w, a locus memory key 20x, a current position memory key 20y, and a switch group 20 of an ON / OFF switch 20z. Open / close switch 20a according to opening / closing of the cover 12b
Is turned on and off, and in the open state, page key 20n, frame key 20o, frame position key 20p, voice memo key 2
0q and cursor keys 20r to 20u are exposed so that they can be operated. On the case 12a, a hole 27a for a microphone 27 (see FIG. 4) built in the case 12a,
And a speaker 26 (see FIG. 4) built in the case 12a.
A plurality of holes 26a for each of the reference holes) are provided.

As shown in FIG. 4, the route guide device 12 includes a VICS antenna 13, a VICS receiver 14, and a GP.
S receiver 15, main controller 18, LCD display 19, operation switch group 20, route name database ROM
21, atlas database ROM 22, Kanji font data ROM 23, voice recording / playback controller 24, voice data memory 25, speaker 26 described above, microphone 27 described above, guidance destination / route memory 2
8, traveling locus data memory 29, spot data memory 3
0, a work memory 31, and a route name memory 32. The distance sensor 16 and the direction sensor 17 are connected to the controller 18. GPS antenna 11 is GPS
It is connected to the receiver 15.

The GPS antenna 11 is used together with the GPS receiver 15 to obtain the absolute coordinates of the current position by using GPS (Global Positioning System). The obtained absolute coordinates of the current position are sent to the controller 18 every second.

The distance sensor 16 measures the distance traveled by the moving body. When this device is mounted on a vehicle, a vehicle speed sensor that measures the number of rotations of the wheels may be used to determine the travel distance by multiplying the number of rotations of the wheel by the length of the circumference of the wheel.

The azimuth sensor 17 measures the absolute azimuth of the moving body. The orientation sensor, for example,
A gyro sensor or a geomagnetic sensor is used.

The VICS antenna 13 and the VICS receiver 14 receive a signal from a road antenna (not shown) arranged on the road. The on-road antenna transmits the shape and direction of the intersection at the end of the location, information on the branch destination, and the like. VICS is Vehicle Information Communicat
Abbreviation for ion System. VICS antenna 13 and V
The ICS receiver 14 receives information from the roadside antenna,
The data is sequentially sent to the controller 18.

The LCD display 19 is a liquid crystal display, and in accordance with instructions from the controller 18, guidance information (destination location, destination remaining distance, running locus, etc.) and current location information of the moving body (map book position, running locus). Etc.) is displayed.
The Kanji font data ROM 23 is a ROM (read-only memory) that stores data for multiple Kanji fonts.
Is. The controller 18 reads the Kanji font data from the Kanji font data ROM 23 as necessary, and
Kanji characters are displayed on the D display 19.

The route name database ROM 21 is a ROM in which route name data is stored and is used for setting traveling routes. The map book database ROM 22 is a ROM in which data such as latitude and longitude for each page of a specific map book and map scale is stored. When the latitude and longitude of a certain point is given, which page of the map book 33 It is used to identify whether it is a position or separately to know the latitude and longitude from the specified position in the map book 33. The controller 18 reads the data stored in the route name database ROM 21 and the map book database ROM 22 as needed.

The voice data memory 25 is a memory capable of storing voice data. Voice recording / playback controller 2
Reference numeral 4 denotes a device that operates in response to an instruction from the controller 18, stores voice data input from the microphone 27 in the voice data memory 25, and causes the stored voice data to ring from the speaker 26.

The guidance destination / route point memory 28 is a memory capable of storing a plurality of destinations or route points set by the user. In the present embodiment, it is possible to store position data at a maximum of eight locations. There is. Running locus data memory 2
Reference numeral 9 is a memory for storing traveling locus data, which stores the locus data according to an instruction from the controller.
The spot data memory 30 is a memory for storing spot data, and stores the spot data according to an instruction from the controller. The work memory 31 is a memory that temporarily holds data. The route name memory 32 is a memory for storing the route name data, and stores the route name data according to the instruction of the controller.

The controller 18 is composed of a microcomputer and operates according to the flow charts shown in FIGS.

FIG. 5 shows the main routine of the controller 18. When the controller 18 starts, the input / output terminals of the microcomputer are set and the RAM and the like are initialized in step 100. After that, the mode selection routine 200, the current position calculation routine 300, the guidance calculation routine 400, and the screen display routine 500 are sequentially repeated.

The mode selection routine 200 is for selecting and deciding a mode such as display contents displayed on the LCD display device 19. The modes used in this example are:
There are a guidance display mode, a VICS display mode, a destination direction display mode, a present location display mode, and a GPS / clock display mode. The guidance display mode is further divided into a long-distance locus mode, a medium-distance locus mode, and a short-distance locus mode. In the mode selection routine, as shown in FIG. 6, first, the key input from the operation switch group 20 is detected (step 201). Here, the state of each key of the operation switch group 20 operated by the user is set. Next, the open / close switch 20 of the operation switch group 20
If a is off, display key processing step 203
If the open / close switch 20a is turned on, the setting key processing step 204 is executed. Next, the ON / OFF key 20z of the operation switch group 20
If the ON / OFF key 20z is off, the power-off process is performed, and all the processes are terminated. If the ON / OFF key 20z remains on, the process returns to the main routine and continues the process.

The display key processing step 203 is for switching each display mode according to the user's key selection, and is set in a state where the cover 12b is closed in FIGS. Details of the display key processing step 203 are shown in FIG.

When the trajectory key 20d is pressed, the display mode value is switched in the guide display mode in step 602. Here, each time this step is entered, the long-distance locus mode, the medium-distance locus mode, and the short-distance locus mode are sequentially switched.

When the numeric keys 20f-20m are pressed,
In step 604, the target transit point is switched. Here, the destinations and transit points stored at a maximum of eight locations are switched according to the number of the pressed key. This allows the user to select the destination or transit point that he is currently aiming for.

If the VICS key 20c is pressed, the display mode value is switched to the VICS display mode in step 606.

When the destination direction key 20e is pressed, in step 608, the display mode value is switched to the destination direction display mode.

If the present position key 20v is pressed, the display mode value is switched to the present position display mode in step 610.

When the voice key 20b is pressed, the voice data is converted to voice and output in step 612. Here, the voice recording / playback controller 24 is instructed to read the voice data from the voice data memory 25 and to output the voice from the speaker 26.

When the GPS / clock key 20w is pressed,
In step 614, the display mode value is switched to GPS / clock display mode.

When the locus storage key 20x is pressed, the locus storage process is performed in step 616. As will be described later, the working memory 31 sequentially stores traveling locus data up to the present location with a constant data amount, but here, the traveling locus data is stored in the traveling locus data memory 29.

When the current position memory key 20y is pressed,
At step 618, the current position storing process is performed. Here, the spot data of the current position is stored in the spot data memory 30.

The setting key processing step 204 is for setting and inputting a destination, a waypoint, etc. in accordance with a key operation by the user, and is set with the cover 12b open in FIGS. Details of the setting key processing step 204 are shown in FIG.

When the numeric keys 20f to 20m are pressed,
In step 622, the setting mode value is switched to the destination / route point mode, and the destination / route number to be set at the same time is switched to the number of the pressed key.

When the current position key 20v is pressed, the set mode value is switched to the current position mode in step 624.

If the VICS key 20c has been pressed, in step 626, travel route setting processing is performed. Here, the route name data of the planned traveling is set. The LCD display 19 displays some data from the route name data (road name) stored in the route name database ROM 21.
Is displayed, and the up / down cursor keys 20r and 20t are used for movement / selection, and the right cursor key 20s is used for setting / deletion.

Next, a process is selected according to the set mode value (step 627). If the setting mode value is the mode for setting the destination / route, the destination / route setting routine 628 is executed, and if the setting mode value is the current mode, the current setting routine 629 is executed.

Next, the destination / route destination setting routine 6
The details of 28 are shown in FIG.

If the page key 20n and the frame key 20o are pressed at the same time, at step 632, the map book number is set. Here, the map book number is set using the up, down, left, and right cursor keys 20r to 20u.

When the page key 20n is pressed, at step 634, the map book page number is set. Here, the page numbers in the map book are set using the up, down, left, and right cursor keys 20r to 20u.

When the frame key 20o is pressed, in step 636, the frame number is set. Here, the up / down / left / right cursor keys 20r to 20u are used to set the frame number in the page.

When the in-frame position key 20p is pressed, in step 638, the in-frame position is set. Here, the up / down / left / right cursor keys 20r to 20u are used to set the relative coordinates in the frame.

When the voice memo key 20q is pressed, voice data is input in step 640. Here, the voice data is loaded from the microphone 27 to the voice recording / playback controller 24, and the voice data memory 2
5 sends an instruction to store voice data.

Voice memo key 20q and in-frame position key 20
If p is pressed at the same time, in step 642, the data of the destination / route point designated by the above operation is cleared.

From the above, the destination desired by the user
A waypoint is set.

Next, details of the current position setting processing routine 629 are shown in FIG.

If the page key 20n and the frame key 20o are pressed at the same time, the map book number is set in step 652. Here, the map book number is set using the up, down, left, and right cursor keys 20r to 20u.

When the page key 20n is pressed, in step 654, the map book page number is set. Here, the page numbers in the map book are set using the up, down, left, and right cursor keys 20r to 20u.

When the frame key 20o is pressed, in step 656, the frame number is set. Here, the up / down / left / right cursor keys 20r to 20u are used to set the frame number in the page.

If the in-frame position key 20p is pressed, the in-frame position is set in step 658. Here, the up / down / left / right cursor keys 20r to 20u are used to set the relative coordinates in the frame.

As described above, the user sets the current position.

Next, details of the current position calculation routine in the main routine will be described with reference to FIG. Here, first, in step 301, the GPS receiver 14
Receive GPS data from. Next, in step 302, the VICS-related data is received from the VICS receiver 15. This data is stored in the working memory 31.
Stored in. Further, in step 303, the distance and azimuth data from the distance sensor 16 and the azimuth sensor 17 are received. Next, the distance and azimuth data from the distance sensor 16 and the azimuth sensor 17 and the GPS data from the GPS receiver 14 are compared to correct and update the distance and azimuth data to obtain more accurate current position data. The map book position calculation step 305 is the absolute latitude and longitude of the current position obtained from the current position data and the map book database ROM.
The map book data stored in 22 is compared and calculated to determine which map book, which page, which page number, which frame number, and which frame position the current position is.

Next, details of the guidance calculation routine in the main routine will be described with reference to FIG. here,
If the destination is not set, the display mode value is set to the current position display mode. If there is a destination setting, measure the linear distance between the current position and the absolute coordinates of the destination,
The remaining distance is obtained (step 403). In addition, when a plurality of waypoints are set, a more accurate remaining distance can be obtained by individually calculating the straight line distances between the waypoints and adding them. next,
The direction of the destination with respect to the current position is obtained from the current position and the absolute coordinates of the destination (step 404). Next, the traveling locus data is updated by adding the point of the current location to the traveling locus data accumulated so far.

When the running locus memory is full, old data is deleted. Next, at step 406, a guide display content selection step is performed.

In the guidance instruction content selection step, it is determined which of the set waypoint, traveling locus, current position, remaining distance, and direction is to be displayed. First, it is divided according to the size of the remaining distance between the present location and the destination. As shown in FIG. 16, the area within the distance A from the destination is the area 3 and the distance A.
The area in the range B to B is set as the area 2, the area in the range B to C is set as the area 1, and the area in the range C or more is set as the area 0. Here, A <B <C <D. Current location is area 0
If it belongs to, select all display of destinations and transit points, blinking the number of target destinations and transit points, display of traveling locus, display of current location, display of remaining distance, display of direction, long-distance locus mode. Set to. If it belongs to area 1, the display of the number of the target destination, the display of the traveling locus, the display of the current position, the display of the remaining distance, and the display of the bearing are selected, and the medium distance locus mode is set. If it belongs to the area 2, the display of the number of the target destination, the display of the traveling locus, the display of the current location, the display of the remaining distance, and the display of the bearing are selected, and the short distance locus mode is set. If it belongs to the area 3, the display of the number of the target destination and the display of the traveling locus are selected, and the arrival locus mode is set. Hysteresis may be provided in the direction deviating outward of the area.

Next, details of the screen display routine in the main routine will be described with reference to FIG. here,
In step 501, the display mode value set in the above-mentioned mode selection routine is determined. If the display mode value is the guide display mode, the guide display routine is executed in step 502. If the display mode value is the VICS display mode, VICS display is performed in step 503. If the display mode value is the current position display mode, the current position is displayed in step 504. If the display mode value is GPS / clock display mode, GPS / clock display is performed in step 505. If the display mode value is the destination direction display mode, arrow display is performed in step 505. Then, in step 506, audio output is performed.

The details of the guide display routine are shown in FIG.
Here, the trajectory mode value set in the guidance instruction content selection step 406 is determined in step 511.
If the mode value is the long-distance locus mode, all paths are displayed in step 512. If the mode value is the medium-distance locus mode, enlarged display 1 is performed in step 513. If the mode value is the short-distance locus mode, enlarged display 2 is performed in step 514. If the mode value is the trajectory mode, step 515
Display to reach.

In the guide display routine 502, the display set in the guide instruction content selection step 406 described above is displayed as L.
It is displayed on the CD display 19. The traveling locus, remaining distance, azimuth, etc. are displayed on the LCD display 19 according to the distance to the destination. A display example of the guidance display is shown in FIG. (A) is an example of arrow display in the destination direction display mode. Displays the direction and straight line distance of the destination viewed from the current location. (B) is an example of all-routes display in the long-distance trajectory mode. Display of all destinations / routes, flashing numbers of target destinations / routes, display of travel route, display of current location, display of remaining distance,
The direction is displayed. (C) is an example of enlarged display 1 in the medium-distance locus mode. It displays the number of the target destination, the traveling path, the current location, the remaining distance, and the bearing.

(D) is an example of enlarged display 2 in the short-distance locus mode. It displays the number of the target destination, the traveling path, the current location, the remaining distance, and the bearing. (E) is an example of arrival display in the arrival trajectory mode. The number of the target destination and the traveling locus are displayed.
(F) is an example of VICS display. As shown in the figure, the main road, the destination, and the direction thereof received from the transmitter arranged on the road are displayed, and road regulation information in the vicinity thereof is displayed. (G) is an example of the present location display. The map book number, the page number, the frame number, and the position in the frame are indicated by numbers, and the traveling locus and the current position in the frame are displayed. (H) is a display example of the setting screen. You can enter the destination / route number, map book number, page number, frame number, and position within the frame.

Next, details of the all-routes display routine are shown in FIG.
Shown in. First, in step 521, data of a start point, a current position, a destination, and locus data are obtained. Here, as the destination, the value set in the setting key processing routine (FIGS. 8 to 10) is used. When the destination is set by the setting key processing routine, the start position is measured as the start position by measuring the current position at that time. The current location is the current location calculation routine (Fig. 1
The value calculated in 1) is used. As the locus data, all the M pieces of data stored are read from the running locus data memory in which the past current position is accumulated. Start place is (X
0, Y0), current location is (X1, Y1), destination is (X
2, Y2). The locus data is (Xn, Yn). However, n = 1 to M. Next, in step 522, the rotation angle θ is calculated based on the following equation.

[0060]

[Equation 1]

Next, at step 523, the variable K is calculated based on the following equation.

[0062]

[Equation 2]

Next, at step 524, for all points of the trajectory data (Xn, Yn) (n = 1 to M), the trajectory data (Xn ', Y) after the first coordinate conversion is obtained from the following equation.
n ') is calculated.

[0064]

[Equation 3]

Next, at step 525, the maximum value | YT | max in the upward direction of the screen and the maximum value | YB | ma in the downward direction of the screen.
x, the maximum value | XL | max in the left direction of the screen, and the maximum value | XR | max in the right direction of the screen are calculated based on the following equations.

[0066]

[Equation 4]

The maximum value of the locus data in the Y-axis direction is set in | YT | max. The absolute value of the minimum value of the locus data in the Y-axis direction is set in | YB | max. ｜ XL ｜ ma
The absolute value of the minimum value of the trajectory data in the X-axis direction is set in x. The maximum value of the trajectory data in the X-axis direction is set in | XR | max. Next, in step 526, the variable K1 is calculated based on the following equation.

[0068]

[Equation 5]

From the above equation, K1 is (32-W) / |
YT | max, (32-W) / | YB | max, (64-
The minimum value of W) / | XL | max and (64-W) / | XR | max is set. Next, in step 527, the locus data (X
n ″, Yn ″) is obtained.

[0070]

[Equation 6]

In step 528, LCD display 1
On the screen of No. 9, the locus data (X
n ″, Yn ″) is displayed. Further, step 52
At 9, the coordinates of the present location and the waypoint / destination, which have been similarly subjected to the first and second coordinate transformations, are displayed on the screen.
Further, the remaining distance and the direction of the destination obtained by the guidance calculation routine are displayed.

The first and second coordinate transformations will be described with reference to FIGS. 18 and 19. Now, it is set that the absolute coordinates of the start point and the destination have a relationship as shown in FIG.

The screen of the LCD display 19 is 64 vertically and 12 horizontally.
The one with a Todd number of 8 is used. In the first coordinate transformation, the starting point is the point where the width W is vertically and horizontally wide from the lower left point of the screen, and the destination is the width W is vertically and horizontally wide from the upper right point of the screen. , The rotation angle θ and the magnification K are calculated so as to move respectively.

The rotation angle θ is obtained by the equation (1). Further, the magnification K is obtained by the equation (2). When the coordinate conversion is performed based on the formula 3 using the rotation angle θ and the magnification K, the starting point (X0, Y0) is (−64 + W, −3) as shown in FIG. 18B.
2 + W). Similarly, the destination (X2, Y
2) moves to the point (64-W, 32-W). The current location (X1, Y1) is the point (X1 ', Y1'). First
The coordinates of the start point and the destination are fixed to the lower left and upper right, respectively, by the coordinate conversion of, and the midpoint of the start point and the destination becomes the origin. In addition, as the value of W, 8 is used.

Here, as shown in FIG. 19 (a), the traveling locus data converted by the first coordinate conversion is created with the start point and the destination as corners in the Y'-axis direction and the -X'-axis direction. It is assumed that it extends outside of the rectangle. This state may depend on the road conditions and the waypoints are set. In this case, if the first coordinate-converted one is displayed on the screen as it is, a part of the traveling locus will be outside the screen. Therefore, the second coordinate conversion is performed, and the scale is changed so that the entire traveling locus is displayed on the screen. Second
In the coordinate transformation of, the quadrangle shown by the chain line shown in the figure is assumed to accommodate all the trajectory data, and the length of each side of the quadrangle from the origin is | YT | max, | XR | max, |
Let YB | max and | XL | max. A quadrangle having an aspect ratio of 1: 2 having a size including all of the lengths is obtained. This quadrangle is shown by a dotted line in FIG. Further, a scaling factor K1 for reducing the dotted rectangle to fit within the screen is obtained. K1 is obtained by the equation (5). In Equation 6, the locus data is multiplied by K1, and 64 is added to the X ′ component to move the origin to the lower left of the screen, and Y ′ is added.
Add 32 to the ingredients. This makes it possible to create data such that the start point, the destination, and the traveling locus all fit on the screen, as shown in FIG. Incidentally, in obtaining the maximum value by the equation 4, the data of the transit point may be added in addition to the trajectory data. By adding the data of the waypoints, it is possible to create data such that the start point, the destination, the waypoints, and the travel path all fit on the screen.

In the present embodiment, when looking at all the planned travel routes, no matter how the start point and the destination are set, the start point is always fixed at the lower left of the screen and the destination is fixed at the upper right of the screen. Since it is displayed as, it is possible to always grasp the approach to the destination with the same image. Therefore, the visibility on the screen is good, and it is easy to understand and convenient for safe driving.

Further, if there is a running locus or a waypoint that extends out of the screen, the magnification of the screen is changed and displayed, so that the entire running locus can be seen at any time.

[0078]

As described above, in the present invention, the approach to the destination can be always captured with the same image. Therefore, the visibility on the screen is good, and it is easy to understand and convenient for safe driving.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of the route guide device of FIG.

FIG. 3 is a top view of the route guide device of FIG.

4 is an internal circuit diagram of the route guide device of FIG.

5 is a flowchart of a main routine of the controller of FIG.

6 is a flowchart of a mode selection routine of FIG.

7 is a flowchart of a display key processing routine of FIG.

8 is a flowchart of a setting key processing routine of FIG.

9 is a flowchart of a destination / route stop setting processing routine of FIG.

FIG. 10 is a flowchart of a current location setting processing routine of FIG.

11 is a flowchart of a current position calculation routine of FIG.

12 is a flowchart of the guidance calculation routine of FIG.

13 is a flowchart of the screen display routine of FIG.

FIG. 14 is a flowchart of the guide display routine of FIG.

15 is a flowchart of the all-routes display routine of FIG.

16 is an explanatory diagram of the operation of the route guide device of FIG.

17 is an explanatory diagram showing a display example of the route guide device of FIG.

FIG. 18 is an explanatory diagram showing the operation of the present invention.

FIG. 19 is an explanatory diagram showing the operation of the present invention.

[Explanation of symbols]

 10 Navigation Device 11 GPS Antenna 12 Route Guide Device 12a Case 12b Cover 13 VICS Antenna 14 VICS Receiver 15 GPS Receiver 16 Distance Sensor 17 Direction Sensor 18 Main Controller Step 204 Setting Means Step 512 Display Control Means Steps 522-524 First Coordinate conversion means Steps 525-527 Second coordinate conversion means 19 LCD display (display) 20 Operation switch group 20a Open / close switch 20b Voice key 20c VICS key 20d Trajectory key 20e Destination direction key 20f-20m Numeric switch 20n Page key 20o Frame key 20p Frame position key 20q Voice memo key 20r to 20u Cursor key 20v Current position key 20w GPS clock key 20x Trace memory key 0y Current location memory key 20z ON / OFF switch 21 Route name database ROM 22 Atlas database ROM 23 Kanji font data ROM 24 Voice recording / playback controller 25 Voice data memory 26 Speaker 26a hole 27 Microphone 27a hole 28 Guidance destination / route point Memory 29 Travel locus data memory (memory means) 30 Point data memory 31 Work memory 32 Route name memory 33 Map book 34 sheet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Ken Hayashi, 2-1-1 Asahi-cho, Kariya City, Aichi Prefecture, Aisin Seiki Co., Ltd. (72) Yasuko Aoki 2-1-1, Asahi-cho, Kariya City, Aichi Prefecture Within Seiki Co., Ltd.

Claims (2)

[Claims] 1. A setting means for setting a planned traveling course including a start point and a destination, a display having a rectangular screen, and a planned traveling course such that the start point and the destination are always arranged at specific positions on the display. And a display control unit that changes the rotation, movement, and scale of the display and displays the display on the display. 2. The display control means arranges a midpoint of a line connecting a start place and a destination at the center of the screen, rotates and scales a planned running course around the midpoint, and changes the start place to the screen. 2. The navigation device according to claim 1, wherein the destination is moved to a fixed point at the lower left of the, and the destination is moved to a fixed point at the upper right of the screen.