JP2859767B2 - Navigation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation apparatus for displaying the position of a vehicle on a map.

2. Description of the Related Art A navigation device is a device for assisting the navigation of a moving body by outputting the position of the moving body. In a vehicle traveling on a road, its position is limited to the ground surface. By determining the position on the dimensional plane, the position of the vehicle can be determined.

There are various means for obtaining the position, but they are roughly classified into a self-contained navigation system and a navigation assistance system.

[0004] The self-contained navigation system is dead reckoning navigation, in which a position at the time is obtained from a moving speed and a moving direction of a moving body with an origin position as a starting point. The navigation assistance system is a method of obtaining position information using radio waves emitted from a plurality of wireless stations, and a typical example of the system is a GPS (Global Positioning System).

However, any of the systems has advantages and disadvantages due to position determination errors. In a navigation device mounted on a vehicle and used for navigation support, a dead reckoning navigation system and a GPS are used in combination. There are many devices.

In a car navigation system capable of displaying an image, a method is generally used in which the position of the vehicle is traced on a displayed road map in real time, thereby outputting the current position of the vehicle. It is used for

In such a navigation device, a vehicle driver selects a driving road with reference to a display map.
This is convenient because it can be determined. In addition, since a function of scrolling a display map is generally provided, it can be referred to and used as a road map.

In this case, since the position of the vehicle is displayed on the display map, the positional relationship between the destination and the current position can be visually recognized. Therefore, assistance in selecting and determining a traveling route to reach the destination can be obtained.
Incidentally, such a navigation device is disclosed in Japanese Patent Application No. Hei.
No. 3,332,266.

However, when the vehicle driver recognizes the position of the vehicle on the display map, the recognition is better if the display is made so that the position of the vehicle is located at the center of the display map.

Therefore, after scrolling the display map and referring to the road map, it is necessary to perform the reverse scroll operation and operation so that the position of the vehicle is located at the center of the display map.

Therefore, there is a need for a navigation device that does not require such troublesome operations.

[0012]

[Prior art]

(1) Configuration Example of Navigation Device FIG. 4 is a block diagram illustrating a configuration of the navigation device.

1) Classification of Configuration The components of the navigation device can be roughly classified into the following three categories.

Map data storage unit 2 for storing map data

A location detecting section 3 for detecting the position of the vehicle.

A display 6 for drawing a map and the position of the vehicle and a drive circuit 5 for the display 6

A main microcomputer (Main-Microcomputer) 1 for controlling the above components 2, 3, and 5 and for displaying the target map and the position of the vehicle on the display 6.

An operation switch 4 for giving a command to the main microcomputer 1 to operate the navigation device 14

A communication bus 7 as a communication medium between the map data storage unit 2 and the main microcomputer 1 of the location detection unit 3.

2) Configuration of Map Data Storage Unit In the navigation device 14 illustrated in FIG. 4, a CD-ROM (Compact Disk-Read-Only M) is used as a storage medium.
This is a mechanism for reading map data via the decoder 9 using emory). Access control of map data is CD
-Performed by the ROM control microcomputer 10. That is, when map data is accessed from the main microcomputer 1, the map data is read and transmitted to the communication bus 7.

3) Configuration of Location Detecting Unit The navigation device 14 illustrated in FIG. 4 is a system for detecting the position of the vehicle using dead reckoning navigation.

That is, the traveling speed of the vehicle is detected by the wheel speed sensor 11, and the traveling direction of the vehicle is detected by the geomagnetic sensor 12. Then, they are integrated over time to calculate the moving azimuth and the moving distance from the starting position, which is the origin position. That is, the calculation is performed by the location calculation microcomputer 13.

The result of the operation is periodic (for example, 1
(in the cycle of sec) on the communication bus 7.

Incidentally, the main microcomputer 1 receives the calculation result indicating the position of the vehicle and displays the position of the vehicle on the map displayed on the display 6.

When the GPS is used as the location detector, a receiver for receiving GPS radio waves is used instead of the wheel speed sensor 11 and the geomagnetic sensor 12. When GPS is used together, a receiver for receiving GPS radio waves is additionally provided.

4) Configuration of Operation Switches FIGS. 5A and 5B are diagrams illustrating an example of switch arrangement and a display editing screen. FIG. 5A is a diagram of an example of switch arrangement viewed from the front of a keyboard, and FIG. FIG. 6 is a diagram expressing a relationship between a screen and a display screen by a logical model on a map data space on a memory.

The operation switch 4 illustrated in FIG. 5A includes a group of switches 16 _-1 , 16 _-2 , for scrolling a display map.
..., and 16 _-8 illustrate a display changeover switch 15 for reference only map That road map, and a function selector switch 28 for switching the function of the scroll switch 16 _-1 to 16 _-8.

The scroll switches 16 _{-1 to} 16 _-8 can scroll the display map and the vehicle position in four directions of east, west, north and south, and also in four directions of northeast, southeast, southwest, and northwest. This is a specification example in which scrolling is possible in a total of eight directions.

By the way, if the upward direction of the operation switch 4 on the drawing is defined as the north direction, the scroll switch 16 _-1 is defined.
Is an operation switch for giving a command for scrolling the display map and the vehicle position in the north direction.

5) Configuration of Image Editing Memory FIG. 5B shows a display editing memory space provided on the memory space of the main microcomputer 1 (FIG. 4). That is, the memory space is equal to the map data space.

In this specification example, the edit screen 17 is logically composed of nine blocks 17 _-1 , 17 _-2 ,..., 17 _-9 , and each block 17 _-1 , 17 _-2,. ..., it is equal to the size of 17 _-9 sized display output screen 18 _a (18 _B).

That is, the access of the map data to the map data storage unit 2 (FIG. 4) is performed by the respective logical blocks 17 _-1 ,
17 _-2 ,..., 17 _-9 are performed in units of one block, and those blocks 17 _-1 , 17 _{-2 ,.}
One editing screen 17 is formed by connecting the editing screens 17 on the memory space.

[0033] Then, the read out map data around that coordinate position portion or coordinates (X _1, Y ₁₎ object of the editing screen 17, a mechanism to obtain a display output screen 18 _A. In addition, the scroll control of the display map and the position of the vehicle can be performed in real time.

In general, the position 19 of the own vehicle is displayed and arranged at the center (coordinates (X ₁ , Y ₁ )) of the display output screen 18 _A , and the map is moved with the movement of the vehicle. This is a mechanism for displaying the position of the vehicle.

(2) Operation of Navigation Apparatus (See FIGS. 4 and 5) 1) Outline of Operation The operation of the navigation apparatus can be represented by overall control by the main microcomputer 1 and display control of a map and the position of the vehicle.

That is, when the position of the vehicle is operated and designated by the operation switch 4, the main microcomputer 1 accesses the map data storage unit 2 to read out the map data of the area, and displays it through the drive circuit 5. Is displayed on the display 6. By operating and specifying the current position of the vehicle on the display map, a symbol (Symbol) indicating the position of the vehicle is displayed.
Is output on the map.

On the other hand, when the vehicle moves, the wheel speed sensor 11
, The moving distance is detected, and the geomagnetic sensor 12 detects the moving direction. Therefore, by integrating these values with the elapsed time in the location calculation microcomputer 13, the moving direction and the moving distance from the departure position are obtained. Then, the location information is periodically transmitted to the communication bus 7.

Therefore, the main microcomputer 1 updates the position of the vehicle on the display map based on the received location information, and displays the current position of the vehicle on the display map in real time.

2) Main Routine of Main Microcomputer FIG. 6 illustrates the main routine of the main microcomputer.
It is an AC II chart.

When the navigation device is activated, first, a map is displayed in step S101, and the process proceeds to step S102.

In step S102, it is determined whether or not the operation switch 4 has been operated.
At 103, the process of defining and specifying the operation switch 4 is performed, and the routine goes to Step S104.

In step S104, it is determined whether or not the location information of the own vehicle has been transmitted from the location detecting unit 3. If the location information of the own vehicle has been received, the display is performed based on the location information in step S105. Updates the position of the vehicle on the map.

Subsequently, a count operation of a 10-sec timer is provided in step S106, and if the count of 10 sec has been completed in step S107, the function of the scroll switch is set to the map center mode in step S108. The map center mode means that the processing of the scroll switch is processed as a map moving function (map reference function).

Then, the process returns to step S102, and thereafter, steps S102 to S108 are repeatedly executed.

The timer processing in steps S106 to S108 is linked to the operation of the function changeover switch and the scroll switch described in 4) and 5) below.

3) Processing of the display changeover switch FIG. 7 illustrates the processing operation of the display changeover switch.
It is an AC II chart.

The switch processing operation illustrated in FIG.
This is a processing operation when the display changeover switch 15 shown in FIG. 5A is operated, and is a part of the step S103 in the main routine shown in FIG. The location mode in the figure indicates an operation mode in which the position of the vehicle is displayed on a display map of the navigation device.

That is, it is determined in step S201 whether or not the vehicle is in the location mode. If the vehicle is in the location mode, the location mode is released in step S202, and in step S203, the vehicle marker for indicating the vehicle position is deleted.

On the other hand, if it is determined in step S201 that the mode is not the location mode, the mode is set to the location mode in step S204, and the map data is read so that the vehicle marker indicating the position of the vehicle is located at the center of the display map.
indicate.

4) Processing of Function Changeover Switch (See FIG. 5) FIG. 8A is a YAC II chart for explaining the processing operation of the display changeover switch.

That is, the program shown in FIG.
This is executed when the function changeover switch 28 shown in FIG. 5A is operated, and it is determined in step S301 whether or not the vehicle center mode is set. The vehicle center mode means that the processing of the scroll switch is processed as a function of moving the position of the vehicle.

If the mode is the vehicle center mode, the map center mode is set (flag setting) in step S302, and the scroll switch process is started.
In step S303, a message "map" is displayed on the display to indicate that the mode is the map center mode. Note that an indicator by other means may be used.

If it is determined in step S301 that the mode is not the vehicle center mode but the map center mode, the flow shifts to step S304 to set the vehicle center mode (set a flag) and start the scroll switch processing. In step S305, the message "map" displayed on the display to indicate the vehicle center mode is deleted.

Then, in step S306, the position coordinates (X ₁ , Y ₁ ) of the vehicle are converted to the center coordinates (X ₂ ,
Y ₂ ) to change the position of the vehicle.

Whether the process is the vehicle center mode or the map center mode is stored on a flag, and the recognition of the mode is performed by referring to the flag even during other processes. It is possible.

5) Scroll switch processing (see FIG. 5) FIG. 8B is a YAC II chart for explaining the scroll switch processing.

That is, the program shown in FIG.
This is executed when the scroll switches 16 _{-1 to} 16 _-8 shown in FIG. 5A are operated. Note that the processing operations of the scroll switch shown in FIG. 8 (b) is a process when the scroll switch 16 _-1 in FIG. 5 (a) is operated. That is, the process is performed when a scroll operation is performed in the Y coordinate direction on the map data space.

[0058] processing operation of the scroll switch 16 _-1 Y coordinate direction, first, it is determined whether the vehicle center mode in step S401, step S40 if a vehicle center mode
In step 2, ΔY is added to the vehicle position coordinates Y ₁ (Y ₁ = Y ₁ + Δ
Y) Yes. Note that ΔY is a predetermined small value.

Then, in step S403, the result of the addition
(X₁, Y₁) Is the readout center coordinate
To display. In this case, the position 19 of the vehicle is the coordinates
(X ₁, Y₁)be equivalent to. Therefore, on the display map
The position 19 of the own vehicle moves by ΔY in the Y coordinate direction.

[0060] On the other hand, if it is determined that the map center mode in step S401, adds the _{ΔY (Y 2 = Y 2 +} ΔY) to the coordinates Y ₂ when reading the map step S404. Then, in step S405, the coordinates (X ₂ , Y ₂ ) obtained from the result of the addition are read out and displayed as the center coordinates. In this case, the position 19 of the vehicle is coordinates (X ₁ , Y ₁ ).
It is. Therefore, the position of the vehicle on the display map
The displayed map is scrolled in the Y coordinate direction by ΔY without changing 19.

While the scroll switch is being operated, a 10-sec timer is started in step S406. That is, while the scroll switch is being operated, the 10-second timer is started again immediately after counting, so that the counting does not end. When the scroll switch is no longer operated, counting is sequentially performed and the counting is completed. still,
This timer is the timer in step S106 shown in FIG.

Therefore, if 10 seconds elapse after the scroll switch is no longer operated, the mode becomes the map center mode, and the function of the scroll switch automatically changes.

Note that other scroll switches (16 _-2 to 1
_6-8 ), the processing routine is the same, and the small coordinates to be added to the read coordinates (X ₁ , Y ₁ ) centered on the own vehicle and the read coordinates (X ₂ , Y ₂ ) centered on the map. The only difference is the formulas for calculating the values ΔX and ΔY.

For reference, each scroll switch (16 _-2
The calculation formula is shown below for each of ~ _16-8 ). It is assumed that reference numerals 16 _{-2 to} 16 _-8 of the scroll switches are in the directions shown in FIG.

[0065] processing X ₁ = X ₁ + ΔX scroll switch 16 _-2 equivalent to Y ₁ = Y ₁ + ΔY → corresponding X ₂ = X ₂ + ΔX in step _{S402, Y 2 = Y 2 +} ΔY → step S404

[0066] corresponds to the corresponding X ₂ = X ₂ + ΔX → step S404 to the processing X ₁ = X ₁ + ΔX → step S402 the scroll switch 16 _-3

Processing of scroll switch _16-4 X ₁ = X ₁ + ΔX, Y ₁ = Y ₁ −ΔY → corresponding to step S 402 X ₂ = X ₂ + ΔX, Y ₂ = Y ₂ −ΔY → corresponding to step S 404

[0068] corresponds to the equivalent Y ₂ = Y ₂ -ΔY → step S404 in the processing Y ₁ = Y ₁ -ΔY → step S402 the scroll switch 16 _-5

[0069] The processing of the scroll switch _{16 -6 X 1 = X 1 -ΔX} , Y 1 = Y 1 -ΔY → step S402 to corresponding X ₂ = X ₂ -ΔX, corresponds to Y ₂ = Y ₂ -ΔY → step S404

[0070] corresponds to the equivalent X ₂ = X ₂ -ΔX → step S404 to processing X ₁ = X ₁ -ΔX → step S402 of the scroll switch 16 _-7

Processing of scroll switch _16-8 X ₁ = X ₁ −ΔX, Y ₁ = Y ₁ + ΔY → corresponding to step S402 X ₂ = X ₂ −ΔX, Y ₂ = Y ₂ + ΔY → corresponding to step S404

[0072]

As described above, in the conventional navigation system using dead reckoning, the position of the vehicle on the display map can be set by operating the scroll switch and the display can be performed. The surrounding road map can be referred to without changing the position of the vehicle on the map.

In the latter case, since the position of the vehicle is displayed on the display map, the positional relationship between the destination and the current position can be visually recognized. Therefore, assistance in selecting and determining a traveling route to reach the destination can be obtained.

Further, the symbol representing the position of the vehicle can be deleted and referred to as a simple road map.

Of course, even in the navigation device using the GPS, the surrounding road map can be referred to without changing the position of the own vehicle on the display map, and the symbol representing the position of the own vehicle is erased to remove the simple road. It can be referenced and used as a map.

However, in the case where the vehicle driver recognizes the position of the vehicle on the display map, the recognition is better if the display is made so that the position of the vehicle is located at the center of the display map.

For this purpose, after referring to the road map by scrolling the display map, the vehicle driver performs a scroll operation / work reverse to the previous operation so that the position of the vehicle is located at the center of the display map. Need to do. This is a very troublesome operation / operation.

FIGS. 9A and 9B are diagrams for explaining the problem of scrolling the display map. FIG. 9A shows a case where the vehicle is displayed at the center of the display map, and FIG. It is a figure showing the case where a display map is scrolled.

That is, in the state shown in FIG. 9A, the position 19 of the vehicle is located at the center of the map displayed by the display 6, and
In the case where the vehicle is traveling while tracing the road toward the front in the figure, and the position 19 of the own vehicle is located in the center of the display map, the state of the peripheral road centering on the own vehicle is universal. It can be recognized without.

On the other hand, the state shown in FIG. 9B is a case where the scroll switch _16-3 is operated in the map center mode and a road map on the right side of the display map is referred to. in this case,
A road map on the right side in the traveling direction of the vehicle can be referred to.

However, in this state, the road map on the left side is almost unknown, and it is not suitable to receive navigation support while traveling straight on the road that is currently in progress.

Therefore, after referring to the road map on the right side, it is necessary to operate the scroll switch _16-7 so that the position 19 of the own vehicle is again positioned at the center of the display map as shown in FIG. 9 (a).

The technical problem of the present invention is to realize a navigation device which can easily display the position of the vehicle at the center of the display map, thereby improving the road map reference function and the navigation support function. Compatible operating environment,
The purpose is to support the realization of more secure vehicles.

[0084]

FIG. 1 is a diagram for explaining a basic configuration of the present invention. FIG. 1A is a block diagram showing the configuration, and FIG.
FIG. 4 is a diagram showing a map data space and a position of the vehicle in the space in a logical model.

The present invention is characterized in that after referring to a road map by scrolling, a map centering on the position of the own vehicle is automatically displayed.

(1) Basic device configuration In other words, the present invention is a navigation device having the following configuration requirements.

Map data storage means 20 storing map data

Own vehicle position detecting means 21 for detecting the position of the own vehicle

Display means 22 for drawing the map and the position of the vehicle

The map data storage means 20 is accessed to read out the necessary map data, and the display means 22 displays the map. The vehicle information obtained from the vehicle position detection means 21 is also displayed. Display control means 23 for displaying the position superimposed on the map displayed on the display means 22

The scroll switch 24 for giving a command for moving the map displayed on the display means 22 and the position of the vehicle.

A display changeover switch 25 for giving an instruction to display the position of the vehicle at the center of the screen of the display means 22.

A display layout change command is given to the display control means 23 based on the movement command by the scroll switch 24, and the position of the own vehicle is displayed on the basis of the command by the display changeover switch 25. Display mode control means 27 for giving an instruction to display at the center position of the screen of the means 22 to the display control means 23

(2) Apparatus configuration for automatically returning the vehicle display position. That is, a configuration in which a timer 26 serving as a reference for measuring elapsed time is added to the apparatus configuration of (1). In addition, the navigation device includes the following display mode control means 27a instead of the display mode control means 27.

A display layout change command is given to the display control means 23 based on a movement command by the scroll switch 24, and the position of the own vehicle is displayed at the center of the screen of the display means 22 based on a command by the display changeover switch 25. Is given to the display control means 23, and the time elapsed since the movement command by the scroll switch 24 is no longer input is measured by the timer 26. Display mode control means 27a for giving an instruction to the display control means 23 to display the position of the vehicle at the center of the screen of the display means 22

[0096]

The navigation device of the present invention operates the scroll switch 24 to refer to the road map, and if the scroll switch 24 is not operated thereafter, the vehicle position is displayed on the screen based on the time set in the timer 26. Automatically returns to the center map display.

That is, the time after the scroll switch 24 is no longer operated is measured by the timer 26, and after a predetermined time has elapsed, the position of the vehicle is displayed on the display means.
An instruction to perform display at the center of the screen of 22 is given from the display mode control means 27 to the display control means 23 and controlled.

By the way, as shown in FIG. 1 (b), the display center of the road map referred to by the scroll switch 24 is (X ₂ , Y ₂ ). position of automatically self-vehicle from the display of the display output 18b (X _1, Y ₁₎ centered road map, display output 18a is displayed.

As described above, according to the present invention, a road map centering on the position of the own vehicle is displayed without any operation after referring to the road map. Therefore, it is possible to automatically return to the display screen when receiving navigation support.

[0100]

[0101]

[0102]

[0103]

Next, a navigation device according to the present invention will be described.
An embodiment will explain how this can be embodied in practice.

(1) Configuration In this embodiment, the present invention is applied by using the configuration of the navigation device illustrated in FIGS.

Therefore, the main microcomputer 1
To change the control program. The program that needs to be changed is a switch process in the main routine.

In this embodiment, a microcomputer system having a timer built in the main microcomputer 1 is employed, and the display mode control means 27 (27a) shown in FIG. 1A is implemented by software of the microcomputer system. Realize. Therefore, the display control means 23, the timer 26, and the display mode control means 27 (27a) enclosed by a broken line in FIG.
Are realized on the main microcomputer 1 in FIG.

(2) Operation 1) Main Routine FIG. 2 is a diagram illustrating the operation of the embodiment, and is a YAC II chart illustrating the main routine of the main microcomputer.

The main routine of this embodiment differs from the conventional program shown in FIG. 6 in steps S509 to S511. That is, 30 sec.
Timer-2 counting work, and set
If the counting of sec is completed, a display is made in step S511 so that the vehicle position is located at the center of the map.

It should be noted that Step S506 to Step S508
The sec timer-1 is a process for automatically switching the function of the scroll switch (16 _{-1 to} 16 _-8 ) to the map center mode.

The timer processing of steps S509 to S511 is performed in conjunction with the operation of the display changeover switch and the scroll switches (16 _{-1 to} 16 _-8 ) described below.

2) Processing of display changeover switch and scroll switch FIG. 3 is a YAC II chart for explaining the switch processing of the embodiment, where (a) is a diagram for explaining the processing operation of the display changeover switch, and (b) is a scroll diagram. It is a figure explaining a processing operation of a switch.

The location mode in FIG. 3 is an operation mode (display mode) for displaying a vehicle marker of the vehicle on the display map and outputting the position of the vehicle on the map. Is a symbol on the display for representing the position of the vehicle. Incidentally, as a mode opposed to the location mode, there is a map mode for displaying only a road map.

Further, whether or not the position of the vehicle is displayed at the center of the display map is stored in a flag-1. If the logical value of the flag-1 is "1", the vehicle is positioned at the center. , And “0” indicates that it is out of the center position. The flag is the same as the conventional flag used to store the function (vehicle center mode or map center mode) of the scroll switches (16 _{-1 to} 16 _-8 ).

Processing of display changeover switch (FIG. 3 (a)
The processing operation of the display changeover switch is significantly different from that of the conventional program illustrated in FIG.

That is, the program shown in FIG. 3A is executed when the display changeover switch is operated, and the program proceeds to step S.
In step 601, it is determined whether the mode is the location mode.

If the mode is the location mode, it is determined in step S602 whether or not the vehicle marker is displayed so as to be located at the center of the display map (determined based on whether flag-1 is "1" or "0"). If it is not displayed at the center, it is displayed at step S603 so as to be located at the center, and the flag -1 is set to "1".

If it is determined in step S602 that the vehicle marker is displayed at the center of the display map, the location mode is canceled in step S604. Then, in step S605, the vehicle marker is deleted. That is, the map mode is set.

On the other hand, if it is determined in step S601 that the mode is the map mode, the location mode is set in step S606, the vehicle marker is displayed in step S607, and the vehicle marker is positioned at the center of the display map. indicate.

Processing of Scroll Switch (See FIG. 3B) Processing of the scroll switch (16 _{-1 to} 16 _-8 ) is described in FIG.
This is substantially the same program as the conventional program illustrated in (b), except that in step S706, two timers, namely, timer-1 and timer-2 are simultaneously activated.

Therefore, steps S701 to S701
The processing operation of 705 is the same as the processing operation of steps S401 to S405 in FIG.

[0121] It should be noted that the timer -1 scroll switch (16 _-1
16-8 ) is a timer for automatically shifting the function from the vehicle center mode to the map center mode. Timer-2 automatically shifts the display position of the vehicle marker to be located at the center of the display map. Timer.

That is, the display mode is set to the location mode of the vehicle center display, and the scroll switch (16 _{-1) is used.}
The mode of operation to 16 _-8) and the map center mode, referring to the road map by operating the scroll switch (16 _-1 to 16 _-8), by steps S509 ~ step S511 in the main routine of FIG. 2, Scroll switch (16 _{-1 to} 16
_-8 ) 30 seconds after the operation is stopped, the vehicle marker is automatically returned and displayed so that the vehicle marker is located at the center of the display map.

(3) Other Embodiments In the above embodiment, the storage mode is set in the location mode.
Crawl switch (16 _-1~ 16_-8) To refer to the road map.
The scroll switch (16_-1~ 16_-8) Operates
After 30 seconds have passed since the vehicle was no longer displayed, the position of the vehicle marker
Position was displayed in the center of the display map.

If such specifications are unnecessary, the timer-2 of steps S509 to S511 in the main routine shown in FIG. 2 and the step S706 in the scroll switch processing shown in FIG. What is necessary is just to delete the description about the activation of. That is, the process related to timer-2 may be deleted.

As a result, the vehicle marker can be displayed so as to be located at the center of the display map only by operating the display changeover switch.

[0126]

As described above, according to the navigation system of the present invention, a road map around the own vehicle can be automatically displayed after referring to a road map around the position of the own vehicle. As a result, a navigation device having both a road map reference function and a navigation support function in an excellent operation environment is realized, and as a result, safer navigation support can be realized.

[0127]

[Brief description of the drawings]

1A and 1B are diagrams illustrating a basic configuration of the present invention, in which (a) is a block diagram illustrating the configuration, (b) is a diagram illustrating a map data space and a position of a vehicle in the space by a logical model, It is.

FIG. 2 is a diagram for explaining the operation of the embodiment, and is a YAC II chart for explaining a main routine of a main microcomputer.

FIGS. 3A and 3B are YAC II charts for explaining a switch process of the embodiment, in which FIG. 3A is a diagram for explaining a processing operation of a display changeover switch and FIG. 3B is a diagram for explaining a processing operation of a scroll switch;

FIG. 4 is a block diagram illustrating a configuration of a navigation device.

5A and 5B are diagrams illustrating an example of a switch arrangement and a display editing screen. FIG. 5A is a diagram illustrating an example of a switch arrangement viewed from the front of a keyboard, and FIG. FIG. 3 is a diagram expressed by a logical model on a map data space above.

FIG. 6 illustrates a main routine of a main microcomputer.
It is an AC II chart.

FIG. 7 illustrates a processing operation of a display changeover switch.
It is an AC II chart.

8A and 8B are YAC II charts for explaining a switch process, in which FIG. 8A is a diagram for explaining a process of a display changeover switch, and FIG. 8B is a diagram for explaining a process of a scroll switch.

9A and 9B are diagrams for explaining a problem of scrolling a display map. FIG. 9A is a diagram showing a case where a vehicle is displayed at the center of the display map, and FIG. It is a figure showing the case where it is scrolled.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main-microcomputer 2 Map data storage part 3 Location detection part 4 Operation switch 5 Drive circuit 6 Display 7 Communication bus 8 CD-ROM (Compact Disk-Read-
9 Memory 10 Decoder 10 CD-ROM control microcomputer 11 Wheel speed sensor 12 Geomagnetic sensor 13 Location calculation microcomputer 14 Navigation device 15 Display switch 16 _{-1 to} 16 _-8 Scroll switch 17 (17 _{-1 to} 17 _-9 ) Display editing Screen (memory space for display editing) 17a Map data space 18 Display output screen 18a, 18b Display output 19 Own vehicle position 20 Map data storage means 21 Own vehicle position detecting means 22 Display means 23 Display control means 24 Scroll switch 25 Display switching Switch 26 Timer 27, 27a Display mode control means 28 Function switch

Claims (1)

(57) [Claims] 1. Map data storage means (20) for storing map data; own vehicle position detection means (21) for detecting the position of the own vehicle; display means for displaying at least the map and the position of the own vehicle (1). 22), a scroll switch (24) for giving a command for moving the map displayed on the display means (22), and a timer for measuring the time elapsed since the input by the scroll switch (24) disappeared. 26), and when a predetermined time predetermined by the timer (26) has elapsed,
A navigation device comprising: a display mode control means (27) for switching to a screen for displaying the position of the vehicle at the center position of the display means (22).