JPH0211845B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an in-vehicle navigator that displays the current position of a vehicle on a road map display surface.

Conventionally, this type of device was disclosed in Japanese Patent Application Laid-open No. 55-159299.
There is a ``vehicle traveling position display device'' disclosed in the publication, which displays the current position on the display screen of a road map.

However, with this device, the display tubes arranged on the display screen are set on the transparent film on which the road map is printed, and the display tubes arranged on the display surface turn on in sequence in response to the driving of the vehicle. Even when the operation starts from a specific point,
Each time, it is necessary to operate a switch to match the position of the vehicle to the corresponding position on the transparent film, which poses a problem in that the operation is extremely troublesome.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an in-vehicle navigator that can easily set a position to a specific point by inputting a specific point such as one's home in advance. It is.

In order to achieve the above object, the present invention provides an in-vehicle navigator equipped with a display means for displaying a road map of the area in which the vehicle is traveling and additionally displaying the traveling position of the vehicle on the map, including: on the road map of the display means; indicator display control means for displaying an indicator indicating a predetermined point on the map; changing means for changing the positional relationship between the indicator on the display means and the road map in accordance with an external operation; an instruction means for generating a storage instruction for storing position information and a movement instruction for moving the traveling position of the vehicle to a specific point by an external operation; storage means for storing information on the position of a displayed index as position information on a specific point; when a movement instruction is issued from the instruction means, the position information on the specific point is read from the storage means, and the position information of the vehicle on the display means is read out; The vehicle is characterized by comprising a traveling position movement control means for moving the traveling position to the specific point.

Examples illustrating the present invention will be described below. FIG. 1 is an overall configuration diagram showing one embodiment. In Fig. 1, reference numeral 1 denotes a direction detection device, which includes a direction sensor that detects the X and Y components of the earth's magnetism according to the direction in which the vehicle is traveling, and an A/D converter that converts the signal from this direction sensor into a digital signal. It generates digital signals of X and Y components according to the traveling direction of the vehicle. 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 reads map data of a specific district among them by setting a cassette tape 3a serving as a storage means that stores map data of a plurality of districts (including absolute coordinate data of the upper right point of each map). It is something to explore and read.

4 is a microcomputer that executes software digital arithmetic processing according to a predetermined control program, and includes a CPU 4a, ROM 4b, and RAM.
4c and an I/D circuit section 4d, and is activated by receiving a stabilized voltage from a stabilized power supply circuit (not shown) that generates a stabilized voltage of 5V by receiving power from an on-board battery. , X and Y component digital signals from the direction detection device 1, distance sensor 2
The system performs arithmetic processing upon receiving distance pulses from the vehicle, reading signals from the reading device 3, etc., and generates display signals for displaying a map of a specific area, travel route information, and the like. Note that RAM4C is constantly backed up with power from the vehicle's 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 is displayed on a CRT. It generates video signals and synchronization signals for Reference numeral 6 denotes a CRT display device as a display means, which displays a map of a specific area, a driving route, or a character using the video signal and synchronization signal from the CRT controller 5.
It is to be displayed. 7 is the touch panel section,
It is mounted on the display surface of the CRT display device 6, and generates a serial signal in response to a touch operation on a specific touch area among the 12 divided touch areas provided on the touch panel. 8 is a switch section, which is a push-lock type registration switch 8 that generates a registration instruction when holding the input.
a, a return type set switch 8b for generating a registration or readout set timing, and a return type erase switch 8c for erasing the travel locus. The registration switch 8a and the set switch 8b constitute an instruction means. Note that the microcomputer 4 and CRT controller 5 constitute a control 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 according to the hold acknowledge (HOLDA) signal from the microcomputer 4; 16, 17, and 18 are 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. 20 is a character generator that outputs a display pattern in response to a raster address signal from the display address display controller 13 from the character memory 19. 21 is a first graphic memory for storing map data from the microcomputer 4; 22 is a memory for storing travel route information (traveling trajectory data) from the microcomputer 4;
23, 24, 25 are character generator 20, first and second graphic memories 2
Parallel signals from 1 and 22 are sent to dot counter 1.
A parallel-to-serial (P-to-S) converter 26 converts the data into serial data using the dot timing clock from the microcomputer 4, and a P-to-S converter 23 to select between the graphic and character screens by the screen switching signal from the microcomputer 4. and a video controller that switches reception of signals from the P→S converters 24 and 25 and generates a video signal according to the display timing signal from the display controller 13; 27 is an exclusive unit that generates a synchronization signal according to the horizontal and vertical synchronization signals from the display controller 13; It is an OR circuit. 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 location on the map) and characters are displayed by a screen 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 bending 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, where A stores the map number and the absolute coordinates (coordinates with respect to the North Pole) of the upper right point of the map of that district. 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, it is possible to provide the microcomputer 4 with map data, absolute coordinate data, and a map number of a specific area.

The operation of the above configuration will be explained with reference to the display explanatory diagram in FIG. 5 and the calculation flowcharts shown in FIGS. 6 to 11. 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. Calculation flowchart showing detailed calculation processing of the mode calculation routine in Fig. 6, No. 9
The figure is a calculation flowchart showing detailed calculation processing of the current position calculation routine in Fig. 6, Fig. 10 is a flowchart showing detailed calculation processing of the cursor blinking calculation routine in Fig. 6, and Fig. 11 is a flowchart showing detailed calculation processing of the current position calculation routine in Fig. 6. It is a calculation flowchart which shows the detailed calculation process of the locus deletion calculation routine in the figure.

Now, in a vehicle equipped with components 1 to 8 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 an on-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, the mode calculation routine 300 to the trajectory deletion calculation routine 600 are repeatedly executed at a cycle of about 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.
A CRT is displayed, and when in the map mode, a cursor indicating the current position can be moved, and when in the character mode, calculation processing is executed to enable designation of a specific area on the map, and the process proceeds to the current position calculation routine 400. In this current position calculation routine 400, the CRT
Performs arithmetic processing to change the contents of the current position data and travel trajectory data to be stored in the second graphic memory 22 in the controller 5 with a travel change of ±50 m for each X and Y component,
The process advances to a cursor blinking calculation routine 500. In this cursor blinking calculation routine 500, the cursor is
A computation process is executed to change the storage state of the current position data in the second graphic memory 22 in order to blink the data at a period of 0.6 seconds, and the process proceeds to a trajectory deletion computation routine 600. This trajectory deletion calculation routine 6
At 00, a computation process for erasing the travel trajectory is executed in accordance with the state of the delete switch 8c, and the process returns to the mode computation routine 300. Thereafter, the main routine arithmetic processing from the mode arithmetic routine 300 to the locus deletion arithmetic routine 600 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 is started from the interrupt start step 701, and the process proceeds to the integration step 702, where unit distance data (equivalent to approximately 39.2 cm) is integrated and updated to the distance data D stored in the RAM 4C, and the distance is determined. Proceeding to step 703, it is determined whether the distance data D has reached 6.25 m. At this time, if the distance data D has not reached 6.25 m, the determination will be NO and the process will proceed to return step 710, but if the distance data D has reached 6.25 m, the determination will be YES and the process will proceed to the direction signal input step 704. move on. Then, in this azimuth signal input step 704, the digital X and Y component signals Xa and Ya from the azimuth detection device 1 (east, north in the positive direction, west,
Input south (negative direction) and calculate the average direction Step 7
Proceed to step 05 and save the previous direction data X ₀ , Y ₀ (direction data before traveling 6.25m) and current direction data Xa,
Average azimuth data X, Y is obtained using Ya, and the process proceeds to distance component calculation step 706 to calculate the distance component in the X direction.
Dx is 6.25X/√ ² + ² , distance component Dy in 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), the process proceeds to storage step 707 to store the current azimuth data Xa, Ya as X ₀ , Y ₀ for the next time, and proceeds to distance data reset step 708 to save the distance. data D to 0
and set distance flag step 709.
The program then proceeds to step 710 to set the distance flag, and then proceeds to return step 710 to return to the main routine that was previously interrupted. 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
Compute the distance components Dx and Dy in the X and Y directions that reach 6.25 m, 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 starts from the switch input determination step 301 in FIG.
Determine whether b is newly turned on or not, and
When it does not turn ON, the judgment becomes NO,
Proceeding to the touch data input step 302, the touch data from the touch panel section 7 is input and the data is stored in the RAM.
Store in 4C. Then, the process advances to map mode determination step 303, where it is determined whether the contents of the mode area in RAM4C are in map mode, and when the mode area is in map mode, the determination becomes YES, and the process advances to mode change determination step 304, where RAM4C is in map mode.
It is determined whether the touch data stored in is data indicating a mode change (data when the 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 305, sets the contents of the mode area to character mode, and proceeds to character switching signal output step 306. Then, a character switching signal for displaying the 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 304 is NO,
The process advances to cursor movement determination step 307. In this cursor movement determination step 307, 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),
If the touch data is not cursor movement data, the judgment will be NO and this mode calculation routine 3
One calculation process of 00 is completed, but if the touch data is cursor movement data, the judgment is
When it becomes YES, cursor movement calculation step 308
Proceed to. In this cursor movement calculation step 308, 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 is data for pressing the touch area 32 or 33. The storage contents of the current position data in the second graphic memory 22 in the CRT controller 5 are changed so that the current position data is moved by
, and change the value of the X, Y coordinate data).Similarly, if the data corresponds to the press of the touch area with touch data 35, move the cursor westward, and press the touch area with touch data 40 or 41. The current position data is stored in the second graphic memory 22 so that the cursor is moved south by a predetermined distance when the touch data corresponds to pressing the touch area 38, and the cursor is moved east by a predetermined distance when the touch data corresponds to the press of the touch area 38. The arithmetic processing for changing the stored contents is executed, and one arithmetic processing of this mode arithmetic routine 300 is completed.

On the other hand, when the determination in the map mode determination step 303 is NO, the process proceeds to a mode change determination step 309, and a calculation process similar to that in the mode change determination step 304 is used to determine whether or not the mode is to be changed. At this time, if the determination is YES when changing the mode, the process advances to map mode setting step 310.
The contents of the mode area in the RAM 4C are set to map mode, and the process proceeds to a travel route data conversion step 311, where the travel route data in the second graphic memory 22 in the CRT controller 5 is converted. In this case, the reading device 3 is first 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 the map of the searched district and the map of the previous district are used. A coordinate transformation value is calculated using the absolute coordinate data at , and the travel locus data in the second graphic memory 22 is converted in a sliding manner according to this calculated value, and the X, Y coordinate data in the RAM 4C is similarly converted. Convert. Then, the process proceeds to a map data reading/output step 312, where the map data of the cassette tape 3a is inputted via the reading device 3, and the map data is transferred to the first graphic memory 2.
1, the process proceeds to map switching signal output step 313, where a map switching signal for displaying the map graphic screen on the CRT display device 6 is generated to the video controller 26, and one calculation process of this mode calculation routine 300 is performed. finish. In other words, when switching from the character screen to the graphics screen of a map different from the previous one, the above calculation process is executed,
The current map data is stored in the first graphic memory 2.
1, and the contents stored in the second graphic memory 22 are converted so that the travel trajectory and the cursor indicating the current location are corrected to the current location corresponding to this map. This allows CRT
Even when the map displayed on the display device 6 is switched, the travel trajectory and current position can be displayed in the portion corresponding to the map.

On the other hand, if the determination in the mode change determination step 309 is NO, the process advances to a character calculation step 314. When the character calculation step 314 is reached, the character mode has been set and a character switching signal has been issued to the video controller 26, so the CRT display device 6 is in a character mode as shown in FIG. The screen is being imaged. The numbers 0-2-4-68 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, and 1 at the decrement switch 52. The data is subtracted and updated one by one, set by the set switch 53, and then reset by the reset switch 54, so that arithmetic processing is performed in the character calculation step 314. Note that the numerical data of this region, region, and district, that is, the map number, is stored in the RAM 4C. In addition, the switches 51, 52, 53, and 54 mentioned above are the touch areas 39, 40, and 4 in FIG. 3, respectively.
1,42.

On the other hand, in the switch input determination step 301, when the set switch 8b is newly turned ON, the determination becomes YES, and the process proceeds to the registration determination step 315, where when a registration instruction is issued from the registration switch 8a (registration state ), the judgment is
YES, and the process advances to map mode determination step 316. Here, the map mode determination step 30
It is determined whether or not the map mode is selected using the same calculation process as in step 3. At this time, if the determination is YES in the map mode, the process advances to point coordinate registration step 317.
The map number stored in RAM4C and the X, Y coordinates of the current location (the cursor must be set at the point you want to register by this time),
It is stored in the registration area in the RAM 4C (updating the registered storage contents up to that point), and one calculation process of this mode calculation routine 300 is completed.

If the determination is NO in the map mode determination step 316, the process does not proceed to the point coordinate registration step 317, and one calculation process of the mode calculation routine 300 is completed.

Next, in the registration determination step 315,
When the judgment is NO, that is, the registration switch 8a
If no registration instruction has been issued (in the reading state), proceed to map mode setting step 318.
The content of the mode area in the RAM 4C is set to map mode (in some cases, it may already be in map mode), and the process proceeds to step 319 for converting travel route data to convert the travel route data in the second graphic memory 22 in the CRT controller 5. Convert.
In this case, the reading device 3 is controlled to search for a corresponding map using the map number stored in the registration area in the RAM 4C, and the second graphic is created by the same calculation process as in the travel route data conversion step 311. Convert the traveling trajectory data in the memory 22 in a sliding manner, and further change the data representing the current position to the X, Y coordinate values stored in the registered area in the RAM 4C, and proceed to the map data reading output step 312. . That is, the current position can be moved to a specific point position on the map that has already been registered.

Therefore, in the mode calculation routine 300 shown in FIG. 8, the following operations are performed according to the switch input indicating the state of the switch section 8, the touch data from the touch panel section 7, and the contents of the mode area in the RAM 4C. .

When the set switch 8b is turned on in the registration state in the map mode, the displayed map number and the coordinates of the cursor point are registered in the RAM 4C.
(Before turning on the set switch 8b, set in advance a specific point where you want to register the cursor, such as your home.) When the set switch 8b is turned on in the reading state, the map registered in the RAM 4C is displayed and the cursor is registered. move to the specified point.

If there is a cursor movement instruction when the map mode is on and the mode is not changed, the cursor is moved.

If there is an instruction to change the mode while in map mode, it will change to character mode and
Display the character screen on a CRT display device.

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.

If you are in character mode and receive an instruction to change the mode, it will change to map mode and
A graphic screen of the map is displayed on the CRT display device, 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. 9, 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 will be NO.
At this point, 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 in the Y distance correction step 40.
In step 3, correct the Y distance data DY at the same time (DY
=DY+Dy) and the first X distance determination step 40
Proceed to step 4 to determine whether the X distance data DX has reached a value of 50 m or more. At this time, the X distance data
If DX is a value of 50m or more, the determination becomes YES, and the process proceeds to X distance subtraction step 405, where the value of 50m is subtracted from the X distance data DX, and the process proceeds to display movement step 406, where the ，
The Y coordinate data is converted in the positive direction (eastward) by 50 m, and the travel locus data in the second graphic memory 22 is also moved accordingly.

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 50m is added to the )
and the second graphic memory 2
The travel locus data in 2 is also moved accordingly.

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 step 4 above.
Judgment and arithmetic processing similar to those from 04 to 409 are executed. (Y distance data DY is in either positive or negative direction)
When the value exceeds 50 m, the X and Y coordinate data in the RAM 4C and the traveling locus data in the second graphic memory 22 are moved by 50 m in the corresponding direction. ) The process then proceeds to the next distance flag setting step 411 to reset the distance flag.

That is, in the current position calculation routine 400 shown in FIG. 9, the X and Y coordinate data in the RAM 4C and the traveling trajectory data in the second graphic memory 22 are Perform the conversion.

Next, detailed calculation processing of the cursor blinking calculation routine 500 will be explained. In this cursor blinking calculation routine 500, the calculation process starts from timer flag determination step 501 in FIG.
It is determined whether the timer flag, which is set every 0.6 seconds by an internal timer, is set. If the timer flag is not set, the determination becomes NO and one calculation process of this cursor blinking calculation routine 500 is completed, but if the timer flag is set, the determination becomes YES and the display flag is Proceeding to determination step 502, it is determined whether a display flag indicating that the current position is being displayed is set. If the display flag has been reset, the determination becomes NO, and the process proceeds to current position data creation step 503, where current position data is created using the X, Y coordinate data stored in the RAM 4C (X, Y coordinate data and A total of 9 pieces of data for displaying the current position surrounding this are created), and the process proceeds to display output step 504, where the traveling locus data that has already been stored in the second graphic memory 22 among the current position data created earlier is generated. Display data that does not include
The data for displaying the cursor part that does not include the travel trajectory is output to the second graphics memory 22 and stored therein, and the process proceeds to display flag setting step 505 to set the display flag. is set, the program proceeds to timer flag reset step 506, resets the timer flag, and completes one calculation process of this cursor blinking calculation routine 500. Note that the previously created display data is stored in the RAM 4C, and may be converted in conjunction with calculations in the cursor movement process (step 308) or display movement process (steps 406, 409, etc.) described above. (In this case, the display data is first read from the RAM 4C, display data that is worth erasing due to movement is selected, and the data in the second graphic memory 22 corresponding to this display data and the selected display data are , and then the updated current position data X, Y
The data in the area that is newly displayed and moved is displayed in the second
This creates display data for the portion that does not include the travel trajectory, stores this in the RAM 4C, and stores the data corresponding to the display data in the second
It is output and stored in the graphics memory 22 of the computer.

On the other hand, when the judgment in the display flag judgment step 502 is YES, the display data reading step 50
Step 7 reads the display data stored in the RAM 4C, and proceeds to display clear step 508, where the read display data causes the cursor portion that does not include the travel trajectory to be displayed, and the data is stored in the second graphic memory 22. Then, the process proceeds to display flag reset step 509 to reset the display flag, and proceeds to timer flag reset step 506.

That is, this cursor blinking calculation routine 50
0, the timer flag is set every 0.6 seconds by an internal timer, and if the display flag is set, current position data is created, and the display data that does not include travel trajectory data is displayed in the second graph. The data for displaying the cursor part that does not include the travel trajectory is stored in the second graphics memory 22, and if the display flag is reset, it is created by referring to the contents in the graphics memory 22. The data for displaying the cursor portion that does not include the travel trajectory using the read display data is cleared from the second graphic memory 22. Therefore, on the CRT display device 6, a cursor (consisting of nine pixels) indicating the current position blinks at a cycle of 0.6 seconds.

Next, detailed calculation processing of the trajectory deletion calculation routine 600 will be explained. In this locus deletion calculation routine 600, the calculation processing starts at switch input determination step 601 in FIG. 11, and it is determined whether the deletion switch 8c is turned on. If the switch 8c is not turned ON, the determination becomes NO and one calculation process of this trajectory deletion calculation routine 600 is completed, but if the deletion switch 8c is turned ON, the determination becomes YES and the travel trajectory is cleared. Proceeding to step 602, the travel trajectory data stored in the second graphic memory 22 is cleared, and one calculation process of this trajectory deletion calculation routine 600 is completed.

Therefore, the current position data and traveling trajectory data are stored in the second graphic memory 22 by the repeated calculations of the main routine by the mode calculation routine 300 to the trajectory deletion calculation routine 600 and the interrupt calculations 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.
If the character mode is selected, the character screen for specifying the map shown in FIG. 5 is displayed. In addition, a registration switch 8a, a set switch 8
Depending on the operation state b, the coordinates and map number of a specific point (set by a cursor) are stored at the time of registration, and the cursor is moved to the registered specific point at the time of readout.

Next, a second embodiment in which the mode calculation routine 300 of FIG. 8 in the above embodiment is partially modified will be described with reference to the calculation flowchart of FIG. 12.

FIG. 12 shows the steps from map mode setting step 318 to map switching signal output step 313 in FIG.
After the map mode setting step 318, the process proceeds to a map number determination step 320, in which the map number stored in the registration area in the RAM 4C is stored in the first graphic memory 21. RAM corresponding to the map
It is determined whether the map number is the same as the map number stored in the RAM 4C, and if it is the same, the determination becomes YES and the process proceeds to the current position movement step 321, where the map is left as it is and the X, which represents the current position stored in the RAM 4C, is The Y coordinate value is changed to the X, Y coordinate value stored in the registration area in the RAM 4C, and the process proceeds to map switching signal output step 313.

Further, when the determination in the map number determination step 320 is NO, the process goes through the travel route data conversion step 319, the map data reading output step 312, and then the map switching signal output step 313, similar to the calculation process in the first embodiment. move on.

That is, when the registration switch 8a is turned off and the set switch 8b is turned on,
The map corresponding to the map number stored in the registration area of RAM 4C is stored in the first graphic memory 2.
1, the reading device 3 can be controlled so as not to read new map data.

In the above-mentioned embodiment, to explain the relationship between each component described in the claims, the CRT controller 5 and the CRT display device 6 constitute display means, and the current position calculation routine of FIG. The arithmetic processing constitutes the index display control means, and the touch areas 32, 33,
35, 38, 40, 41 and the arithmetic processing of the cursor movement determination step 307 and the cursor movement calculation step 308 in FIG. RAM4C in Figure 1
The calculation processing of the point coordinate registration step 317 in FIG. 8 constitutes a storage means, and the calculation processing of the traveling route data conversion step 319 of FIG.
The arithmetic processing in steps 320, 321, and 319 in FIG. 2 constitutes a traveling position movement control means.

Further, in the above embodiment, one set switch 8b is used, but it is also possible to use a plurality of sets switches 8b so that a plurality of points can be registered and read.

Further, in the above embodiment, the point coordinates to be registered are registered at the position of the cursor representing the current position, but a numeric keypad may be provided and the point coordinates may be entered numerically.

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.

Furthermore, in order to prevent the movement of the cursor by the touch panel section 7 and the set switch 8b due to erroneous operation, a prohibition switch may be provided to prohibit the movement of the cursor when the switch is turned on.

Furthermore, although the cursor is moved vertically and horizontally using the touch panel section 7, means for moving the cursor not only vertically and horizontally but also in any angular direction may be used. Further, instead of an instruction to move the cursor using the touch panel section 7, the cursor may be moved by detecting an instruction to move the cursor from the driver's voice.

As described above, in the present invention, a specific point on the map is stored in advance by external operation, and when a movement instruction is issued, the vehicle's running position is moved to the stored specific point. For example, if you register the location of your home as a specific point as a departure point that you always use, you can easily move your current location to a specific point such as your home without having to perform any troublesome operations when the vehicle starts operating. It has the excellent effect of being able to

[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, Figure 4 is an explanatory diagram showing the data area of the cassette tape, and Figure 5 is the CRT display. A display explanatory diagram showing the display state of the device, Fig. 6 is a calculation flowchart showing the overall calculation processing of the main routine of the microcomputer, and Fig. 7 shows the calculation processing of the interrupt calculation routine based on the distance pulse from the distance sensor. Calculation flowchart, Figure 8 is a calculation flowchart showing detailed calculation processing of the mode calculation routine in Figure 6;
The figure is a calculation flowchart showing detailed calculation processing of the current position calculation routine in Fig. 6, Fig. 10 is a calculation flowchart showing detailed calculation processing of the cursor blinking calculation routine in Fig. 6, and Fig. 11 is a calculation flowchart showing detailed calculation processing of the current position calculation routine in Fig. 6. A calculation flowchart showing detailed calculation processing of the trajectory deletion calculation routine in the figure,
FIG. 12 is a flowchart of essential calculations showing another embodiment of the present invention, and FIG. 13 is a block diagram showing the configuration of the present invention. 1... Direction detection device, 2... Distance sensor, 3a
...Cassette tape, 3...Reading device, 4, 5...
...a microcomputer that constitutes the control means,
CRT controller, 6...as a display means
CRT display device, 8a, 8b...Registration switch and set switch as instruction means.

Claims (1)

[Scope of Claims] 1. In an in-vehicle navigator equipped with a display means for displaying a road map of the area in which the vehicle is traveling and additionally displaying the traveling position of the vehicle on the map, a predetermined mark is displayed on the road map of the display means. indicator display control means for displaying an indicator indicating a point; changing means for changing the positional relationship between the indicator on the display means and the road map in accordance with an external operation; an instruction means for generating a storage instruction for storing a memory instruction and a movement instruction for moving the traveling position of the vehicle to a specific point by an external operation; storage means for storing information on the position of a specific point as position information on a specific point; and when a movement instruction is issued from the instruction means, reading the position information on the specific point from the storage means and displaying the traveling position of the vehicle on the display means; An in-vehicle navigator comprising a travel position movement control means for moving to the specific point. 2. The in-vehicle navigator according to claim 1, wherein the indicator indicates the traveling position of the vehicle.