JPH0328716B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an in-vehicle navigator that displays a road map of the area in which a vehicle is traveling and a traveling position on the map.

[Conventional technology]

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, 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 to inform the driver. This simplifies the detection of the driving position.

[Problem to be solved by the invention]

However, since this device uses a transparent film with a road map printed on it, when driving on a road that is not on the road map display, driving on that road is very effective (for example, a shortcut). Even if you try to drive on that road again at a later date, there is a problem in that you cannot search for that road on the road map display because the road is not on the road map display.

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide an in-vehicle navigator that can store travel trajectories of roads that are not displayed on a road map display and display them in addition to the road map display.

[Means to accomplish the task]

In order to achieve the above object, the present invention, as shown in FIG. 12, includes: display means for electronically displaying at least a road map of the driving area of the vehicle; current position detection means for detecting the current position of the vehicle; road map data storage means storing road map data of a predetermined area including the area of the road map to be displayed on the display means; and road map data of a vehicle driving area read from the road map data storage means and displayed on the display means. In addition to displaying the road map of the driving area,
Display control for displaying the current position detected by the current position detection means at a corresponding position on the road display, and further displaying changes in the current position on the road map as the vehicle travels as a travel trajectory on the display means. storage instruction means for generating a storage instruction for storing a predetermined range of travel trajectories among the travel trajectories displayed by the display means; and storage instruction means for generating a storage instruction for storing a predetermined range of travel trajectories from the storage instruction means. a travel trajectory storage means for storing a road map as a travel trajectory for adding a road; It is determined that the travel trajectory is to be displayed on the road map of the new travel area, and the travel trajectory stored in the travel trajectory storage means is displayed on the new road map displayed on the display means. The present invention is characterized by comprising a road adding means for additionally displaying the road.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention shown in the drawings will be described.

FIG. 1 is an overall configuration diagram showing one embodiment. In this Fig. 1, 1 is a direction detection device;
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 denotes a reading device which searches for and reads the map data of a specific district using a set of cassette tapes 3a which store map data of a plurality of districts (including absolute coordinate data of the upper right point of each map). It is something.

4 is a microcomputer that executes software digital arithmetic processing according to a predetermined control program, and includes a CPU 4a, an RQM 4b, and a RAM.
4c and an I/O circuit section 4d to constitute a control means, which receives power from the on-vehicle battery.
It is activated by receiving a stabilized voltage from a stabilized power supply circuit (not shown) that generates a stabilized voltage of V, and receives digital signals of X and Y components from the direction detection device 1 and the distance sensor 2. It receives the distance pulse of , the reading signal from the reading device 3, etc., performs arithmetic processing, and generates a display signal for displaying a map of a specific area, driving route information, etc. In addition, the RAM 4c is constantly backed up with power from the on-board battery, and stores various data necessary for calculation processing by the CPU 4a, as well as data on the latest travel trajectory (for example, a travel trajectory of several kilometers) and the travel trajectory of a specific section in a specific area. It remembers the data.

Reference numeral 5 is a cathode ray tube (hereinafter referred to as CRT) controller which receives display signals from the microcomputer 4 and individually stores map data, driving route information, and character data of a specific area, and stores the stored map data, driving route information, Alternatively, it generates video signals and synchronization signals for displaying character data on a CRT. Reference numeral 6 denotes a CRT display device as a display means, which displays a map, driving route, or character of a specific area on a CRT using the video signal and synchronization signal from the CRT controller 5. Reference numeral 7 designates a touch panel section as a panel switch, which is attached to the display surface of the CRT display device 6 and outputs a corresponding serial signal when a specific touch area among the 12 divided touch areas provided on this touch panel is touched. It is something that occurs. Reference numeral 8 denotes a resetting type storage switch which generates an instruction to store the traveling locus, and numeral 9 denotes a resetting type set switch which generates an instruction to set the traveling locus memory. The memory switch 3 and the set switch 9 constitute an instruction means.

Next, the CRT controller 5 shown in FIG.
The detailed electrical wiring diagram will be explained. 11 is
Oscillation circuit that generates a 12.096MHz oscillation signal, 12
divides the oscillation signal from oscillation circuit 11 to 6.048M
A dot counter 13 generates a Hz dot timing clock and a 756KHz character timing clock, and 13 generates horizontal and vertical synchronization signals and displays according to instructions (commands) from the microcomputer 4 and character timing clocks from the dot counter 12. A display controller 14 generates a timing signal, a refresh memory address signal, and a raster address signal, and a display controller 14 generates a hold signal to hold the microcomputer 4 during the display period based on the horizontal and vertical synchronization signals from the display controller 13. This is a hold signal generation circuit that is generated at the hold (HOLD) terminal of the 15 is a multiplexer which switches the address signal from the microcomputer 4, the refresh memory address signal from the display controller 13, and the raster address signal in response to a hold acknowledge (HOLDA) signal from the microcomputer 4; 16, 17, and 18 A bus driver 19 has a tri-state that switches the direction of data between the microcomputer 4 and the display memory, and a bus driver 19 stores display data such as ASCII codes from the microcomputer 4 and receives a refresh memory address signal from the display controller 13. A character memory 20 receives the data and outputs the contents as an address, and a character generator 20 outputs a display pattern based on a display address from the character memory 19 and a raster address signal from the display controller 13. 21 is a first graphic memory that stores map data from the microcomputer 4; 22 is a second graphic memory that stores travel route information (travel trajectory data, current position data) from the microcomputer 4; 23; 24 and 25 are parallel to serial (P to S) converters that convert parallel signals from the character generator 20 and the first and second graphic memories 21 and 22 into serial data using the dot timing clock from the dot counter 12.
A converter 26 switches reception of signals from the P→S converter 23 and P→S converters 24 and 25 from the display controller 13 in order to select the graphic and character screens according to the screen switching signal from the microcomputer 4. A video controller 27 generates a video signal using a display timing signal from the display controller 13, and an exclusive OR circuit 27 generates a synchronizing signal using horizontal and vertical synchronizing signals from the display controller 13. Note that the character memory 19 and the first and second graphic memories 21 and 22 are constantly backed up with power from an on-vehicle battery.

That is, this CRT controller 5 stores character data in the character memory 19 based on the data sent from the microcomputer 4.
Then, the map data is stored in the first graphic memory 21.
The display data of the travel trajectory and current position is constantly stored in the second graphic memory 22, and the graphic screen (displaying the travel trajectory and current position on the map) and the character are displayed by a double-sided switching signal from the microcomputer 4. The CRT display device 6 generates a video signal and a synchronization signal for selecting a screen (displaying designated characters, etc. to designate a district) and displaying a screen corresponding to the selection on the CRT.

The touch panel section 7 has 12 touch areas 31 to 42, as shown in FIG. configured,
When a specific touch area is pressed, the touch area is detected by the contact of the transparent conductive film of the matrix due to the deflection of the glass, and a serial signal (start signal) corresponding to the touch area detected by a touch signal generation circuit (not shown) is detected. and touch information signals). Note that this touch signal generation circuit generates the current touch information as a serial signal every 40 msec.

Furthermore, FIG. 4 shows a data area corresponding to one district on the cassette tape 3a, and A stores the absolute coordinate data (coordinates with respect to the North Pole) of the upper right point of the map of that district and the map number. B is a map data storage section storing map data of the area, and X 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 Fig. 5 and 1.
This will be explained with reference to the display explanatory diagram in FIG. 1 and the calculation flowcharts shown in FIGS. 6 to 10. FIG. 6 is a calculation flowchart showing the overall calculation processing of the main routine of the microcomputer 4, FIG. 7 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. 9 is a calculation flowchart showing detailed calculation processing of the mode calculation routine in FIG. 6; FIG.
FIG. 0 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 9 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 upon receiving the stabilized voltage of 5V from the stabilized power supply circuit, starts its arithmetic processing at the start step 100 in FIG. 6, and proceeds to the initial setting routine 200. The registers, counters, latches, etc. in the microcomputer 4 are set to the initial state necessary for starting the arithmetic processing. After this initial setting, a mode calculation routine 300 and a current position calculation routine 4 are executed.
The arithmetic processing of 00 is repeatedly executed at a period 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 content corresponding to that mode is selected.
Displays the CRT, and when in the map mode, it enables the movement of the cursor that indicates the current position, and also allows the memory of the driving trajectory.When in the character mode, it executes calculation processing that allows the map designation of a specific area, and calculates the current position. Proceed to routine 400. This current position calculation routine 400 changes the contents of the current position data and travel trajectory data in the second graphic memory 22 of the CRT controller 5 with a travel change of ±50 m for each X and Y component, and Transfer trajectory data to RAM4
The calculation process stored in C is executed, and the process returns to the mode calculation routine 300. Thereafter, the main routine arithmetic processing from the mode arithmetic routine 300 to the current position arithmetic routine 400 is repeatedly executed at a cycle of approximately several tens of milliseconds.

When a distance pulse from the distance sensor 2 is applied to the interrupt (INT) terminal of the microcomputer 4 in response to the repeated calculations of this main routine, the microcomputer 4 temporarily suspends the calculation processing of the main routine. The interrupt calculation process shown in FIG. 7 is executed. That is, the arithmetic processing starts from the interrupt start step 501, proceeds to the integration step 502, updates the distance data D stored in the RAM 4c by integrating the unit distance data (equivalent to 39.2 cm), and then moves to the distance determination step 503. Then, it is determined whether the distance data D has reached 6.25m. 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
Digital X, Y from direction detection device 1 at 04
Input the component signals Xa, Ya (positive directions for east and north, negative directions for west and south), proceed to average direction calculation step 505, and calculate the previous direction data Xo, Yo (direction data before traveling 6.25 m). Average azimuth data X, Y is calculated from the current azimuth data Xa, Ya, and the process proceeds to distance component calculation step 506 to calculate the distance component Dx in the X direction.
6.25X/√ ₂ + ₂ , the distance component Dy in the Y direction
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), the process proceeds to storage step 507 to store the current azimuth data Xa, Ya as Xo, Yo for the next time, and proceeds to distance data reset step 508 to store the distance data D. Reset to O and set distance flag step 50.
The program proceeds to step 9 to set the distance flag, and then proceeds to 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, this
Calculate the distance components Dx and Dy in the X and Y directions for 6.25m, 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 touch data input step 301 in FIG. 8, and touch data from the touch panel unit 7 is input and stored in the RAM 4c. Then, the process proceeds to map mode determination step 302, where it is determined whether the contents of the mode area in the RAM 4c are map mode or not.
If the result is YES, the process proceeds to mode change determination step 303, where it is determined whether the touch data stored in the RAM 4c is data indicating a mode change (data when touch area 34 in FIG. 3 is pressed). . At this time, if the touch data is data indicating a mode change, the determination becomes YES, and the process proceeds to character mode setting step 304, where the contents of the mode area are set to character mode, and character switching signal output step 305.
Then, a character switching signal for displaying a character screen on the CRT display device 6 is generated to the video controller 26 in the CRT controller 5, and one calculation process of this mode calculation routine 300 is completed.

On the other hand, when the touch data is not data indicating a mode change, that is, data when a touch area other than 34 in FIG. 3 is pressed, or data when no touch area is pressed (for example, data FF). Sometimes, the determination in the mode change determination step 303 becomes NO,
The process advances to cursor movement determination step 306. In this cursor movement determination step 306, it is determined whether the touch data is data when any of the touch areas 32, 33, 35, 38, 40, and 41 is pressed (cursor movement data).
That is, 32, 33, 35, 3 in FIG.
Touch areas 8, 40, and 41 act as switches for cursor movement, and it is determined whether any of them has been touched. If the touch data is not cursor movement data, the judgment will be NO. If the touch data is cursor movement data, the determination becomes YES and the process advances to cursor movement calculation step 307. In this cursor movement calculation step 307, in accordance with the touch data, the cursor at the current position displayed on the CRT display device 6 is moved a predetermined distance northward, indicating that the touch data corresponds to the press of the touch area 32 or 33. Similarly, if the touch data corresponds to pressing the touch area 35, move the cursor westward, and if the touch data corresponds to the press of the touch area 40 or 41. The contents of the second graphic memory 22 are stored so that if the data corresponds to the press of the touch area, the cursor is moved southward, and if the data corresponds to the press of the touch area 38, the cursor is moved eastward by a predetermined distance. Execute the arithmetic processing to be changed.

Therefore, 32, 33, 35, 38, 40,
If any of the touch areas 41 continues to be pressed, the touch signal generating circuit continues to generate touch information every 40 ms as described above, so the cursor can continue to move every 40 ms.

Next, the process advances to a travel trajectory storage calculation routine 600. The detailed arithmetic processing of this routine 600 is explained in the ninth section.
It is shown in the figure. First, in step 601, it is determined whether or not a memory instruction has been generated by turning on the memory switch 8. If a memory instruction has not been generated, the determination is NO, but in order to memorize the travel route, the memory switch 8 is turned on. is turned on and a memory instruction is generated from this memory switch 8, the judgment is made.
If the answer is YES, the process advances to step 602 to set a storage flag, and the process advances to step 603 to set the X, Y coordinate data of the current position corresponding to the current cursor position. Then, the process proceeds to step 604, where it is determined whether or not the storage flag is set.
If the memory flag is set, the judgment is
If the answer is YES, the process proceeds to step 605, where it is determined whether or not a set instruction has been generated from the set switch 9 by turning it on. Then, if a set instruction has not been generated, the determination becomes NO, and the set switch 9 is turned on to enter a standby state until a set instruction is generated.

Then, by touch operation on the touch panel section 7, the starting point position of the travel trajectory that you want to store the cursor (for example, as shown in FIG. When the set switch 9 is turned on after adjusting to the starting point b) of the trajectory R, the set switch 9 generates a set instruction, so that when the step 605 is reached, the determination becomes YES. Then, the process proceeds to step 606, where the final position (set in step 603) and starting point position (current cursor (depending on the location), the data on this travel trajectory is stored in the RAM 4c in association with the map number of this map, and the process proceeds to step 607 to reset the storage flag.

On the other hand, when the determination in the map mode determination step 302 in FIG. 8 is NO, the process proceeds to a mode change determination step 308, where it is determined whether or not the mode is to be changed using the same arithmetic processing as in the mode change determination step 303. At this time, if the determination is YES when changing the mode, the map mode setting step 30
Proceed to step 9 to set the contents of the mode area in RAM 4c to map mode, and proceed to data conversion step 310.
Then, the travel route data in the second graphic memory 22 in the CRT controller 5 is converted. In this case, first, the reading device 3 is controlled to search for a specified district using its map number, and the absolute coordinate data (stored in the header section A shown in Fig. 4) on this searched map and the absolute coordinate data on the map of the previous district are used. A coordinate transformation value is calculated from the coordinate data, and the travel locus and current position data in the second graphic memory 22 are converted in a sliding manner according to the calculated value. The program then proceeds to a map data reading/output step 311, inputs the map data of the cassette tape 3a via the reading device 3, outputs the map data to the first graphics memory 21, and proceeds to a travel trajectory reading/output step 312. Based on the map number of the area designated by , it is searched whether or not there is travel trajectory data (stored through the calculation process of the travel trajectory storage calculation routine 600) corresponding to the map number in the RAM 4c.
If there is data on the memorized travel trajectory, the data is read out and output to the first graphic memory 21, and the process proceeds to map switching signal output step 313.
The mode calculation routine 300 generates a map switching signal to the video controller 26 for displaying a map graphic screen on the CRT display device 6.
One calculation process is completed. That is, when switching from the character screen to the graphic screen of a map different from the previous one, the above arithmetic processing is executed, and the current map data and the data of the previously stored travel trajectory are stored in the first graphic memory 21. At the same time, the content in the second graphic memory 22 is 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, and the previously stored travel trajectory can be displayed on the map display. can be displayed.

On the other hand, if the determination in the mode change determination step 308 is NO, the process advances to a character calculation step 314. When the character calculation step 314 is reached, the character mode is set and a character switching signal is being sent to the video controller 26, so the CRT display device 6 displays the character screen as shown in FIG. is being filmed. The number 02 shown in the center of this character screen
-4-68 are numbers that designate regions, regions, and districts, and each number is updated by incrementing by 1 with the increment switch 51, subtracting by 1 with the decrement switch 52, and set with the set switch 53. , reset switch 5
The character calculation step 313 performs calculation processing such that the character calculation step 313 is reset at step 4. Note that the numerical data of this locality, region, and district, that is, the map number, is stored in the RAM 4c. Further, the switches 51, 52, 53, and 54 mentioned above correspond to the touch areas 39, 40, 41, and 42 in FIG. 3, respectively.

That is, in the mode calculation routine 300 shown in FIG. 8, the following operations are performed according to touch data from the touch panel section 7, instructions from the memory switch 8 and set switch 9, and the contents of the mode area in the RAM 4c. conduct.

If there is an instruction to move the cursor when the map mode is in the map mode and the mode is not changed, arithmetic processing for moving the cursor is executed, and if there is no instruction to move the cursor, the map display is continued as it is.

When the mode is in the map mode and the mode is not changed, the running locus is stored in accordance with the operating instructions of a memory switch 8 and a set switch 9, and the stored running locus is additionally displayed when the map of the area is displayed next time.

If there is an instruction to change the mode while in the map mode, the map mode is changed to the character mode and the character screen is displayed on the CRT display device 6.

When the character mode is in effect and the mode is not changed, map changes can be accepted on the character screen as shown in FIG.

When a mode change instruction is given while in the character mode, the character mode is changed to the map mode, a graphic screen of the map is displayed on the CRT display device 6, and at the same time, the travel trajectory and current position are corrected and displayed.

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. 10, and it is determined in the interrupt calculation process in FIG. 7 whether or not the distance flag is set. At this time, if the distance flag is not set, the determination becomes NO and this current position calculation routine 400
One calculation process 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 in the Y distance correction step 403, the Y distance data DY is calculated. is similarly calculated (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 YES.
Then, the process proceeds to the X distance subtraction step 405, where the value of 50m is subtracted from the direction), and the travel locus data is also made to follow along with this.

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 the X distance addition step 408, where the value of 50 m is added to the X distance data DX, and the process proceeds to the display movement step 409, where the second graphic memory 2 is
The current position data in 2 is moved in the negative direction (west direction) by 50 m, and the traveling locus data is also made to follow this.

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 50m, the current position data and traveling trajectory data in the second graphic memory 22 are
Move by 50m in the corresponding direction. )and,
The process advances to the next distance flag reset step 411 to reset the distance flag.

In addition, with the change of the current position data in the second graphic memory, the X, Y coordinate data of the current position in RAM4c is also updated, and
The latest travel trajectory data in 4c is also updated (only the latest one is stored and the old one is discarded).

That is, in the current position calculation routine 400 shown in FIG.
At the same time, the X, Y coordinate data of the current position and the travel trajectory data in the RAM 4c are updated.

Therefore, the current position data and travel trajectory data in the second graphic memory 22 are calculated by repeating the main routine calculations by the mode calculation routine 300 and the current position calculation routine 400, and by the interrupt calculation shown in FIG. At the same time, the screen of the CRT display device 6 is selected according to the specified mode, and if it is in the map mode, the map graphic screen (including the display of the current position and driving trajectory) is displayed, and the character In the mode, a character screen for specifying a map shown in FIG. 5 is displayed.

Further, the travel trajectory is stored in accordance with the operation instructions of the storage switch 8 and the set switch 9, and the stored travel trajectory is additionally displayed on the map display when the map is selected next time.

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.

In addition, although we have shown a device that memorizes the travel trajectory using the movement of the cursor, a transparent tablet is installed in front of the CRT display device 6, and the tablet position on the travel trajectory that you want to memorize is manually operated using a light pen. However, the travel trajectory may be detected and stored by this handwriting operation.

Furthermore, although the current position is calculated based on the signals from the direction detection device 1 and the distance sensor 2, the current position is displayed by receiving point code information from transmitters installed at major points in the area. You may do so.

Furthermore, the RAM 4c stores a new travel trajectory that was not displayed on the map up to that point.
(see figure) may be used to directly write a new travel trajectory.

Furthermore, although the direction detection is performed using geomagnetic detection, it is also possible to use a method that determines the relative direction of the vehicle with respect to the reference direction.

〔Effect of the invention〕

As described above, in the present invention, since the traveling trajectory within a predetermined range of the traveling trajectory displayed on the display means is stored, there is no need to predetermine the range to be stored. The driving trajectory of the vehicle can be stored as a road.
Furthermore, when displaying a road map of a new driving area, it is determined that the stored driving trajectory is to be displayed on the road map, and the driving path is additionally displayed. This has the excellent effect of automatically displaying the set travel trajectory on a road map, and allowing the travel trajectory to function as a newly defined road.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention;
Figure 2 is a detailed electrical wiring diagram of the CRT controller in Figure 1, Figure 3 is an explanatory diagram showing the touch area of the touch panel section, Figure 4 is an explanatory diagram showing the data area of the cassette tape, and Figures 5 and 11. The diagram is
A display explanatory diagram showing the display state of the CRT display device, Fig. 6 is a calculation flowchart showing the overall calculation processing of the main routine of the microcomputer, and Fig. 7 is a calculation processing of the interrupt calculation routine based on the distance pulse from the distance sensor. FIG. 8 is a calculation flowchart showing detailed calculation processing of the mode calculation routine in FIG. 6, and FIG. 9 is a calculation flowchart showing detailed calculation processing of the travel trajectory storage calculation routine in FIG. It is. FIG. 10 is a calculation flowchart showing detailed calculation processing of the current position calculation routine in FIG. 6, and FIG. 12 is a configuration diagram showing the configuration of the present invention. 1... Direction detection device, 2... Distance sensor, 3...
...reading device, 3a...cassette tape, 4...microcomputer as control means, 5...
CRT controller, 6...as a display means
CRT display device, 8, 9... memory switch and set switch as instruction means.

Claims (1)

[Scope of Claims] 1. At least a display means for electronically displaying a road map of a driving area of the vehicle, a current position detection means for detecting the current position of the vehicle, and an area of the road map displayed on the display means. a road map data storage means storing road map data of a predetermined area; reading out road map data of a driving area of the vehicle from the road map data storage means and displaying a road map of the driving area on the display means;
Display control for displaying the current position detected by the current position detection means at a corresponding position on the road display, and further displaying changes in the current position on the road map as the vehicle travels as a travel trajectory on the display means. storage instruction means for generating a storage instruction for storing a predetermined range of travel trajectories among the travel trajectories displayed by the display means; and storage instruction means for generating a storage instruction for storing a predetermined range of travel trajectories from the storage instruction means. a travel trajectory storage means for storing a road map as a travel trajectory for adding a road; It is determined that the travel trajectory is to be displayed on the road map of the new travel area, and the travel trajectory stored in the travel trajectory storage means is displayed on the new road map displayed on the display means. An in-vehicle navigator equipped with a road addition means for additionally displaying roads.