JPH0321848B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an in-vehicle navigator that displays a road map of a region in which a vehicle is driving and a directional position on the map.

Conventionally, as for this kind of thing, for example, Unexamined-Japanese-Patent No. 55
- As shown in No. 159299 "Vehicle travel position display device", a transparent film with a road map printed on it is installed on the front of the dot matrix-shaped fluorescent display tube body, and each detection signal from the travel distance sensor and direction sensor is Based on this information, the distance traveled in each direction from the starting point is accumulated to find the position in plane coordinates, and the current driving position of the vehicle is indicated on the road map by the display operation of the fluorescent display tube, and the driving position is shown to the driver. There are things that make it easier to detect.

However, since this system simply displays the current location of the vehicle, it is very difficult to understand when trying to determine whether or not the current route is correct for the destination.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an in-vehicle navigator that can easily recognize the relative relationship between a travel route to a destination and the current position of the vehicle.

In order to achieve the above-mentioned object, the present invention, as shown in FIG. 10, includes a storage means that stores map data for displaying a road map of a predetermined driving area, and a display means that has a display surface that performs electronic display. a road map display control means for reading map data from the storage means and displaying a road map on the display surface of the display means; detecting the current position of the vehicle and displaying the current position of the vehicle on the road map display of the display means; An in-vehicle navigator equipped with a current position display control means for additionally displaying a position, which is provided on the display surface to enable visual observation of the road map display, and displays a driving route to a destination on the road map display. a driving route input means for inputting associated information; a driving route display means for additionally displaying the driving route input by the driving route input means on the road map of the display means; and a current state of the detected vehicle. The present invention is characterized by comprising an instruction generating means for generating a driving direction instruction for continuing traveling on the traveling route at that point in relation to a position and a predetermined point on the traveling route. It is said that

The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is an overall configuration diagram showing one embodiment. In this Fig. 1, 1 is a direction detection device;
It is equipped with an azimuth sensor that detects the X and Y components of the earth's magnetic field according to the direction in which the vehicle is traveling, and an A/D converter that converts the signal from this azimuth sensor into a digital signal. It generates component digital signals. Reference numeral 2 denotes a distance sensor that generates a distance pulse every unit traveling distance of the vehicle (for example, approximately 39.2 cm). Reference numeral 3 is a reading device that searches for and reads map data of a specific district by using a set of cassette tapes 3a that store map data of a plurality of districts (including absolute coordinate data of the upper right point of each map). It is.

4 is a microcomputer that executes software digital arithmetic processing according to a predetermined control program, and includes a CPU 4a, a ROM 4b, and a RAM.
4c and an I/O circuit section 4d to constitute a control means, which receives power supply from the on-vehicle battery.
It is activated by receiving a stabilizing voltage from a stabilizing power supply circuit (not shown) that generates a stabilizing voltage of 5V, and receives digital signals of X and Y components from the direction detecting device 1 and from the distance sensor 2. distance pulse,
It receives a reading signal from the reading device 3, performs arithmetic processing, and generates a display signal for displaying a map of a specific area, driving route information, etc. Note that the RAM 4c is constantly backed up with power from the on-board battery.

5 is a cathode ray tube (CRT) controller,
In response to a display signal from the microcomputer 4, map data, driving route information, and character data of a specific area are individually stored, and the stored map data, driving route information, or character data are stored by a video controller. It generates video signals (color data signals) and synchronization signals for selective CRT display. 6
is a CRT display device that displays a map, driving route, or character of a specific area on a CRT using video signals and synchronization signals from the CRT controller 5.

Reference numeral 7 designates a keyboard, including a travel route key 7a for inputting a travel route to the destination, a second route key 7b for instructing a second travel route to the destination, and a keyboard for designating main points to the destination. main point key 7c, and a set key 7d for instructing the setting of travel routes or main points.
, keys 7e, 7f, and 7g for instructing to turn left, go straight, and right at major points, mode change key 7h for instructing to change the mode between map mode and character mode, and current information on CRT display device 6. It is provided with keys 7i, 7j, 7k, and 7l for moving the position cursor in east, west, south, and north directions, and generates command signals in response to the input of each key.

Reference numeral 8 is a transparent tablet installed in front of the CRT display device 6, and 8a is a handwriting input tablet pen (hereinafter referred to as a pen) for writing instructions on the tablet 8, such as driving routes and major points. .
Reference numeral 9 denotes a tablet detection device that detects a writing instruction from the pen 8a to the tablet 8 using a Lamb wave (piezoelectric detection or optical detection may also be used), and converts the detected data into the X and Y coordinates for the tablet 8. This is sent to the microcomputer 4 as position information. The tablet 8, pen 8a, and tablet detection device 9 constitute input means.

Reference numeral 10 denotes a digital voice synthesizer, which is equipped with a voice data ROM that stores voice data for generating voice in advance, and sequentially generates corresponding voice data from the voice data ROM in response to a voice command signal sent from the microcomputer 4. The data is read out and synthesized to generate sound from the speaker 11.

Next, FIG.
This shows the data area part corresponding to one district, where A is the header part that stores the absolute coordinates (coordinates with respect to the North Pole) of the upper right point of the map of that district, and B is the header part that stores the map data of that district. The map data storage section shown in FIG. 1 is a blank section. Therefore, by reading portions A and B with the reading device 3, map data and absolute coordinate data of a specific area can be provided to the microcomputer 4.

The operation in the above configuration is shown in Figures 3 and 4.
This will be explained with reference to the display explanatory diagram of the figure and the calculation flowcharts shown in FIGS. 5 to 9. 5 is a calculation flowchart showing the overall calculation processing of the main routine of the microcomputer 4, FIG. 6 is a calculation flowchart showing the calculation processing of the interrupt calculation routine based on the distance pulse from the distance sensor 2, and FIG. FIG. 8 is a calculation flowchart showing detailed calculation processing of the mode calculation routine in FIG. 5; FIG. 8 is a calculation flowchart showing detailed calculation processing of the destination route setting calculation routine in FIG. 7;
The figure is a calculation flowchart showing detailed calculation processing of the current position calculation routine in FIG.

Now, in a vehicle equipped with components 1 to 11 shown in FIG. 1, when a key switch is turned on at the start of operation, each part of the electrical system is activated by receiving power from the vehicle battery. The microcomputer 4 then enters the operating state by receiving the stabilized voltage of 5V from the stabilized power supply circuit, starts its arithmetic processing at the start step 100 in FIG. 5, and proceeds to the initial setting routine 200. In this step, registers, counters, latches, etc. in the microcomputer 4 are set to initial states necessary for starting arithmetic processing. After this initial setting, the mode calculation routine 300 and the current position calculation routine 400 are repeatedly executed at a cycle of approximately several tens of milliseconds.

That is, in this mode calculation routine 300, one of the map mode and character mode is selected, and the contents are changed according to the selected mode.
Displays the CRT, executes arithmetic processing that allows moving the cursor indicating the current position and setting a destination route when in the map mode, and allows specifying a specific area on the map when in the character mode, and then returns to the current position calculation routine 400. move on.

This current position calculation routine 400 performs calculation processing to change the contents of the current position data and travel trajectory data in the CRT controller 5 with a travel change of ±50 m for each X and Y component, and when the current position reaches the main point. A calculation process is executed to generate a sound indicating the direction of travel relative to the ground, and the process returns to the mode calculation routine 300. Thereafter, from this mode calculation routine 300 to the current position calculation routine 400
The arithmetic processing of the main routine is repeatedly executed at a cycle of approximately several tens of milliseconds.

When a distance pulse is applied from the distance sensor 2 to the interrupt (INT) terminal of the microcomputer 4 in response to the repeated calculations of this main routine,
The microcomputer 4 temporarily interrupts the arithmetic processing of the main routine and executes the interrupt arithmetic processing shown in FIG. That is, interrupt start step 50
The arithmetic processing starts from step 1 and goes to integration step 50.
Proceed to Step 2 to update the distance data D stored in the RAM 4c by integrating the unit distance data (equivalent to approximately 39.2 cm), and proceed to distance determination step 503 to check whether the distance data D has reached 6.25 m. Determine. At this time, if the distance data D has not reached 6.25 m, the determination becomes NO and the process returns to step 510.
However, when the distance data D reaches 6.25m, the judgment becomes YES, and the direction signal input step 50 is executed.
Proceed to step 4. Then, this direction signal input step 5
At 04, the digital X from the direction detection device 1,
Step 505: Input Y component signals Xa, Ya (positive direction for east and north, negative direction for west and south) and calculate average direction
Proceed to the previous direction data X ₀ , Y ₀ (direction data before traveling 6.25m) and current direction data Xa, Ya
The average azimuth data X, Y is obtained by calculating the distance component Dx in the
625X/√ ² + ² , and the distance component Dy in the Y direction is
6.25Y/√ ² + ² (X/√ ² + ² is the counterclockwise angle θ with the east direction as the reference)
cos θ, Y/√ ² + ² corresponds to Sin θ), proceed to storage step 507, store the current direction data Xa, Ya as Xo, Yo for next time, proceed to subtraction step 508, and calculate 6.25 from distance data D. The value corresponding to m is subtracted and updated, the process proceeds to a distance flag setting step 509 to set the distance flag, and the process proceeds to a return step 510 to return to the previously interrupted main routine. That is, in this interrupt calculation routine, the distance data D is cumulatively updated every time a unit distance is traveled, and when the distance data D reaches 6.25 m, the distance components Dx in the X and Y directions for this 6.25 m are updated.
Calculate Dy and execute arithmetic processing to set the distance flag.

Next, detailed calculation processing of the mode calculation routine 300 in the main routine will be explained. In this mode calculation routine 300, the calculation process is started from the map mode determination step 301 in FIG. 7, and it is determined whether the contents of the mode area in the RAM 4c are the map mode. When the map mode is not selected, the determination becomes NO, and the process proceeds to mode change determination step 306, where it is determined whether or not a mode change signal is generated by pressing the mode change key 7h from the keyboard 7.
At this time, if the mode change signal is not generated, the determination becomes NO, and character calculation step 3
Proceed to step 11. This character calculation step 311
, the character mode has been set by then, and the CRT display device 6 displays a character screen (white on a black background) as shown in FIG. 3 by the signal from the CRT controller 5. It's being filmed. The numbers 02-4-68 shown in the center of this character screen are numbers that designate regions, regions, and districts, respectively, and each number is updated by adding 1 at the increment switch 51.
The decrement switch 52 subtracts and updates the value by 1, the set switch 53 sets the value, and the reset switch 54 resets the value by a character calculation step 311. Note that the numerical data of this locality, region, and district, that is, the map number, is stored in the RAM 4c. Further, the display by the switches 51, 52, 53, and 54 described above is displayed by the tablet 8 by the pen 8a.
This is done by touching the parts corresponding to the switches 51, 52, 53, and 54 above. That is, the touch operation of the pen 8a on the tablet 8 is detected by the tablet detection device 9, and a signal indicating the coordinate position of the touched tablet is sent to the microcomputer 4.
In the character calculation step 311, it is determined which switch part has been operated, and corresponding processing is executed.

Further, when a mode change signal is generated from the keyboard 7 and the judgment in the mode change judgment step 306 becomes YES, the process proceeds to a map mode setting step 307 and the contents of the mode area in the RAM 4c are changed to the map mode. The program then proceeds to data conversion step 308 to convert the traveling route data (data designated as green) in the traveling route storage area of the CRT controller 5. In this case, first, the reading device 3 is controlled to search for a designated area using its map number, and the absolute coordinate data (stored in the header section A shown in Fig. 4) on the searched map and the absolute coordinate data on the map of the area A coordinate conversion value is calculated from the coordinate data, and the travel trajectory and current position data stored in the travel route storage area of the CRT controller 5 are converted so as to slide according to the calculated values. In addition, the X, Y coordinate data of the current position is
It is stored in RAM4c. Then, the process proceeds to map data reading/output step 309, where the map data of the cassette tape 3a is inputted via the reading device 3, and the map data is outputted as data designated as white to the map data storage area of the CRT controller 5, and the map data is outputted to the map data storage area of the CRT controller 5. Switching signal output step 310
Then, a map switching signal for displaying a map graphic screen on the CRT display device 6 is generated to the video controller in the CRT controller 5, and one calculation process of this mode calculation routine 300 is completed. In other words, when switching from the character screen to the graphics screen of a different map than the previous one, the above calculation process is executed and the current map data is
The contents of the travel route storage area of the CRT controller 5 are stored in the map data storage area of the CRT controller 5, and the contents of the travel route storage area of the CRT controller 5 are converted so that the travel trajectory and the cursor indicating the current location are corrected to the current location corresponding to this map. As a result, even if the map displayed on the CRT display device 6 is changed, the travel trajectory and current location can be displayed in the area corresponding to the map. In this graphic screen, the map is white, the driving route is green, and the background is black.

On the other hand, if the content of the mode area in the RAM 4c is map mode and the determination in the map mode determination step 301 becomes YES, the process proceeds to a mode change determination step 302, where it is determined whether or not a mode change signal is generated from the keyboard 7. do. At this time, if a mode change signal is generated, the determination becomes YES, and the process proceeds to character mode setting step 303, sets the contents of the mode area to character mode, and proceeds to character change signal output step 304. A character switching signal for displaying a character screen on the CRT display device 6 is generated to the video controller in the CRT controller 5, and this mode calculation routine 300
One calculation process is completed.

On the other hand, since no mode change signal is generated from the keyboard 7, the mode change determination step 302
If the determination is NO, the process advances to cursor movement calculation step 305. In this cursor movement calculation step 305, keys 7i to 7l on the keyboard 7 are selected.
When one of them is turned on, the current position cursor displayed on the CRT display device 6 is moved by a predetermined distance in the corresponding direction.
The current position data in the travel route storage area in the CRT controller 5 is changed. That is, when key 7i is pressed, the cursor is moved east, when key 7j is pressed, the cursor is moved west, when key 7k is pressed, the cursor is moved south, and when key 7l is pressed. At this time, arithmetic processing is executed to move the cursor a predetermined distance northward.

Next, the process proceeds to a destination route setting calculation routine 600. The detailed arithmetic processing of this routine 600 is shown in FIG. First, in step 601, it is determined whether the travel route key 7a on the keyboard 7 is pressed and a travel route signal is generated, and if the travel route signal is generated, the process proceeds to step 602 to set a travel route flag. . That is,
A travel route flag is set when an instruction to input a travel route to a destination is received. Then, the process proceeds to step 603, and if the driving route flag is set, the determination becomes YES, and if this is the first driving route input and the second route key 7b has not been pressed, the process proceeds to step 604. Both the judgment and the judgment in step 606 are NO, and the process proceeds to step 608, where the pen 8a is used to touch the tablet 8.
The coordinate data of the travel route to the destination written on the tablet is inputted and stored from the tablet detection device 9. Then, the process proceeds to step 609, where the input and stored coordinate data of the travel route to the destination is outputted to the travel route storage area of the CRT controller 5 as data designated as red. (Thus, the CRT display device 6 displays the actual driving route in green and the driving route to the destination in red.) Then, the set key 7d and main point key 7c on the keyboard 7 are not pressed. Time is step 61
0,612,615, one calculation process of this destination setting calculation routine 600 is completed.

After inputting the first travel route to the destination, when the second route key 7b is pressed to input the second travel route to the destination, the determination becomes YES when step 604 is reached.
The process proceeds to step 605, where the second route flag is set, and the process proceeds to step 606, where the determination becomes YES because the second route flag is set.
Proceeding to step 607, the coordinate data of the second travel route to the destination written on the tablet 8 is input and stored.Proceeding to step 609, the coordinate data of the second travel route to the destination input and stored is input and stored. Output to CRT controller 5 with data specified in red.

After that, when the set key 7d is input after inputting the second travel route to the destination, step 6
10, the determination becomes YES, and the process proceeds to step 611 to reset the driving route flag.The process proceeds to step 612, and since the second route flag is still set, the determination becomes YES, and the process proceeds to step 613. The process proceeds to step 614 to reset the second route flag. In this step 614, first, the total distance of the first travel route and the second travel route (the sum of the respective straight line distances when divided into minimum distance units) is calculated, and the travel route with the shorter total distance is calculated. The first travel route is set as the shortest route, and the contents of the travel route storage area of the CRT controller 5 stored for the longer travel route are erased. For example, as shown in FIG. 4, the first travel route shown at A is written, and the second travel route shown at B is written, and the result of comparing the total distances is B. If the path shown in B is shorter, the path shown in B is set as the shortest route and is set as the first travel route, and the path shown in A is also erased.

On the other hand, when the travel route key 7a is re-inserted and the one shown in FIG. For example, if it is determined that the running route of C is shorter in total distance, the running route of C is set as the shortest route and the running route of B is deleted.

Then, for the traveling route of C, a, b,
When the main point key 7c on the keyboard 7 is pressed to input the traveling direction data for the main points c and d, the determination is made when step 615 is reached.
If the answer is YES, proceed to step 616 to set the main point flag, and proceed to step 617 to confirm that the main point flag has been set.
Become YES. Then, proceed to step 618,
Input and store the coordinate data of a and the direction data operated by the keys 7e to 7g on the tablet 8 with the pen 8a, the coordinate data and direction data of b, the coordinate data and direction data of C, and the coordinate data and direction data of d, respectively. do.

When each operation is completed and the set key 7d is pressed, the determination at step 619 becomes YES, and the process proceeds to step 620 to reset the main point flag.

After this, keys 7a, 7c on the keyboard,
7d, in this destination setting calculation routine 600, steps 601 → 603 → 6
After 12→615→617, that one calculation process is completed.

Next, detailed calculation processing of the current position calculation routine 400 in the main routine will be explained.
In this current position calculation routine 400, the calculation process starts at distance flag determination step 401 in FIG. 9, and it is determined in the interrupt calculation process in FIG. 6 whether or not the distance flag is set. At this time,
If the distance flag is not set, the judgment will be
If the result is NO, one calculation process of the current position calculation routine 400 is completed, but if the distance flag is set, the determination becomes YES and the process proceeds to the X distance correction step 402. Then, in this X-distance correction step 402, the X-distance data DX is corrected by the X-distance component DX obtained by the interrupt calculation process (DX=DX+DX), and then in the Y-distance correction step 4.
In step 03, the Y distance data DY is similarly corrected (DY=DY+DY), and the process proceeds to the first X distance determination step 404, where it is determined whether the X distance data DX has reached a value of 50 m or more. At this time, if the X distance data DX is a value of 50m or more, the judgment is
If the answer is YES, the process proceeds to the X distance subtraction step 405, where the value of 50 m is subtracted from the
The vehicle is moved in the forward direction (eastward) by 50 meters, and the travel trajectory data is also made to follow this movement. Therefore, the green traveling route on the CRT display device 6 is moved eastward by 50 meters instead of the red destination traveling route.

Further, when the determination in the first X distance determination step 404 is NO, the second X distance determination step 40 is performed.
Proceeding to step 7, it is determined whether the X distance data DX has reached a value of −50 m or less. At this time, if the X distance data DX is less than -50m, the judgment is YES.
Then, the process proceeds to an X distance addition step 408 where the value of 50 m is added to the X distance data DX, and the process proceeds to a display movement step 409 where the current position data in the travel route storage area of the CRT controller 5 is changed by 50 m in the negative direction ( (in the west direction), and the travel locus data is also made to follow along with this movement. Therefore,
The green travel route on the CRT display device 6 replaces the red destination travel route by moving westward by 50 m.

Then, the second X distance determination step 407
If the judgment is NO, or display movement step 4
After 06,409, the process proceeds to the Y component display movement processing routine 410, and the Y distance data DY calculated in the Y distance correction step 403 is processed in the above step 4.
Judgment and arithmetic processing similar to those in 04 to 409 are executed. (Y distance data DY is in either positive or negative direction)
When the value exceeds 50 m, the current position data and travel trajectory data in the travel route storage area of the CRT controller 5 are moved by 50 m in the corresponding direction. ) The process then proceeds to the next distance flag reset step 411 to reset the distance flag.
Incidentally, along with the change in the current position, the values of the X and Y coordinate data of the current position stored in the RAM 4c are also changed.

Then, proceeding to map mode determination step 412, it is determined whether the map mode is set,
If map mode is not set, the determination will be NO.
but map mode is set (CRT
(The graphic screen of the map is displayed on the display device 6), the determination becomes YES, and the process advances to match determination step 413. And the current position X,
The value of the Y coordinate data is compared with the value of the coordinate data of the main points previously stored, for example points a, b, c, and d in Figure 4, and if they match, the judgment is YES. become. Then, the process advances to read step 414 to read the direction data for the matched main point, and then to voice command output step 41.
Proceeding to step 5, a voice command signal corresponding to the read direction data is output to the voice synthesizer 10. for example,
At points a and b in FIG. 4, according to the input direction data, a voice command signal is generated, which is "chiyokushin", at point c, "Usetsu", and at point d, "Sasetsu".

Therefore, the mode calculation routine 30 described above
0 and current position calculation routine 400 and the interrupt calculation shown in FIG. CRT display device 6 according to mode
Select the screen, and if in map mode, display the map graphic screen (including display of current position and driving trajectory), and if in character mode, display the character screen for specifying the map shown in Figure 3. let In addition, in the case of a map graphic screen, it is possible to set a driving route to the destination and the direction of travel at major points on the driving route, and the map can be set in white, the actual driving route in green,
Display the driving route to the destination in red.

In addition, in the above embodiment, as a display means
CRT display device 6 is shown, but liquid crystal display device, EL
A display device or the like may also be used.

Also, it is possible to display maps with different scales,
The current position may be calculated and displayed according to the scale.

Furthermore, while map data is obtained from the cassette tape 3a via the reading device 3, and current position data is obtained based on signals from the direction detection device 1 and the distance sensor 2, a map of the driving area is displayed. It is also possible to receive map data for driving the vehicle and current position data indicating the current driving position from transmitters provided at each major point.

Furthermore, a tablet 8 and a pen 8 are used as input means.
a. Although the tablet detection device 9 is shown as being configured, a see-through type finger touch input device that allows input by fingertip operation may also be used.

Furthermore, as a method for inputting map data to the cassette tape 3a, a commercially available device that reads the color information of road maps (a device that uses the same reading method as a facsimile machine) is used, and the map data from that device is input onto a regular cassette tape. You may also enter it in

Furthermore, based on information such as the distance of the driving route to the destination, the average driving speed of the vehicle, fuel consumption, remaining fuel level, etc., it displays the estimated time of arrival at the destination, or whether it is possible to arrive at the destination with the current remaining fuel level. You may also do so.

As described above, according to the present invention, it is possible to easily recognize the relative relationship between the driving route to the destination and the current position of the vehicle, and moreover, it is possible to easily recognize the relative relationship between the driving route to the destination and the current position of the vehicle. This has an excellent effect in that it is possible to input a driving route to the destination, and the input can be easily performed. Furthermore, since a driving direction instruction is generated to continue driving on the driving route at a predetermined point, the driving direction can be used to continue driving without deviating from the driving route. It has excellent effects.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention;
Fig. 2 is an explanatory diagram showing the data area of the cassette tape, Figs. 3 and 4 are explanatory diagrams showing the display state of the CRT display device, and Fig. 5 is an illustration of the overall arithmetic processing of the main routine of the microcomputer. 6 is a calculation flowchart showing the calculation process of the interrupt calculation routine based on the distance pulse from the distance sensor; FIG. 7 is a calculation flowchart showing the detailed calculation process of the mode calculation routine in FIG. Figure 8 is a calculation flowchart showing detailed calculation processing of the destination route setting calculation routine in Figure 7, Figure 9 is a calculation flowchart showing detailed calculation processing of the current position calculation routine in Figure 5, and Figure 10. FIG. 1 is a configuration diagram showing the configuration of the present invention. 1... Direction detection device, 2... Distance sensor, 3a
...Cassette tape, 3...Reading device, 4...Microcomputer as control means, 5...
CRT controller, 6...as a display means
CRT display device, 7...Keyboard, 8, 8a,
9...Tablet, pen, and tablet detection device constituting input means.

Claims (1)

[Scope of Claims] 1. A storage means that stores map data for displaying a road map of a predetermined driving area, a display means that has a display surface that performs electronic display, and a display means that reads map data from the storage means. road map display control means for displaying a road map on the display surface of the display means; current position display control means for detecting the current position of the vehicle and additionally displaying the current position of the vehicle on the road map display of the display means; In the in-vehicle navigator, a driving route input means is provided on the display surface to enable visual inspection of the road map display and input a driving route to a destination in relation to the road map display. a driving route display control means for additionally displaying the driving route input by the driving route input means on the road map of the display means; An in-vehicle navigator comprising: instruction generation means for generating a driving direction instruction for continuing travel on the travel route at a predetermined point in relation to the predetermined point. 2. The in-vehicle navigator according to claim 1, wherein the travel route input means includes point input means for inputting the predetermined point. 3. The in-vehicle navigator according to claim 2, wherein the point input means inputs the setting of the predetermined point in association with the driving direction instruction at that point.