JP2796463B2 - 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 used as a road map.

However, in a device in which the display indicating the vehicle position is fixed near the center of the display screen and the display map is moved along with the movement of the vehicle to indicate the current position of the vehicle, the position of the vehicle is scrolled when the display map is scrolled. You will be out of the right position. Therefore, after scrolling the display map and referring to the road map, it is necessary to reset the position of the vehicle to the correct position on the display map.

Therefore, there is a need for a navigation device that can set the position of the vehicle on the display map and can scroll the display map without changing the position of the vehicle on the display map. I have.

[0010]

2. Description of the Related Art (1) Configuration Example of Navigation Device FIG. 5 is a block diagram illustrating a configuration of a navigation device.

1) Broadly Classification of Configuration The configuration of the navigation device can be roughly divided into the following.

A map data storage unit 2 for storing map data.

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

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

A main-microcomputer 1 for controlling the above components 2, 3, and 5 and displaying a target map and the position of the vehicle on a 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. 5, 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. 5 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 calculation result is periodically (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. 6A and 6B are diagrams illustrating an example of the arrangement of scroll switches and a display editing screen. FIG. FIG. 5 is a diagram expressing a relationship between a display editing screen and a display screen by a logical model in a map data space on a memory.

The operation switch 4 illustrated in FIG. 6A includes a group of switches 16 _-1 , 16 _-2 , for scrolling a display map.
.., 16 _-8 are shown. In other words, this is a specification example in which the display map can be scrolled in four directions of east, west, north and south, and also in four directions of northeast, southeast, southwest, and northwest, so that a total of eight directions can be scrolled.

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 to scroll the display map in the north direction.

5) Configuration of Image Editing Memory FIG. 6B shows a display editing memory space provided on the memory space of the main microcomputer 1 (FIG. 5). That is, the memory space is equal to the map data space.

[0028] Note that in this specification example, logically nine blocks 17 _-1 editing screen 17, 17 _-2, ..., and consists of 17 _-9, the blocks 17 _-1, 17 _-2, & ..., it is equal to the size of the display output screen 18 the size of 17 _-9.

That is, the access of the map data to the map data storage unit 2 (FIG. 5) is performed by each logical block 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.

Then, the map data is read around the target coordinate position portion of the edit screen 17, that is, the coordinates (X ₁ , Y ₁ ), and a display output screen 18 is obtained.
In addition, scroll control of the display map can be performed in real time.

By the way, generally, the position 19 of the vehicle is displayed.
Center of the display output screen 18 (coordinates (X₁, Y ₁))
Then, the map is moved with the movement of the vehicle, and the position of the vehicle is changed.
Is displayed.

(2) Operation of Navigation Apparatus (see FIGS. 5 and 6) 1) Outline of Operation The operation of the navigation apparatus can be represented by general control by the main microcomputer 1 and display control of a map and a 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 representing the position of the vehicle 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) Processing operation of main microcomputer FIG. 7 illustrates a main routine of the main microcomputer.
It is an AC II chart.

When the navigation device is activated, a map is first 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.

Then, the process returns to step S102, and thereafter, steps S102 to S105 are repeatedly executed.

3) Scroll Switch Processing The navigation device is provided with scroll switches 16 _{-1 to} 16 _-8 as illustrated in FIG. 6A, and can control scrolling of a display map. That is, the map displayed on the navigation device can be accessed, used, and referred to as a road map.

FIG. 8 is a YAC II chart for explaining the scroll switch processing operation. The scroll switch processing is performed in the switch processing step S10 shown in FIG.
3 is an example. The coordinates X and Y described in the YAC II chart of FIG. 8 are such that the up direction when the map data space illustrated in FIG. 6B is viewed from the front is the Y coordinate, and the right direction is the X coordinate. .

Next, the processing operations will be described in order.

The processing operation i.e. in the right direction of the scroll switch 16 _-3, it is determined whether the right scroll switch 16 _-3 is operated in step S201. If the scroll switch _16-3 has been operated, the process proceeds to step S20.
The read center coordinates (X) of the display output screen 18 (FIG. 6B)
₁ , Y ₁ ) in the X coordinate direction by ΔX. That is, it moves by a predetermined small distance.

Upper right scroll switch 16_-2Place
In step S201, the right scroll switch 16
_-3If has not been operated, the process proceeds to step S203,
In step S203, scroll switch 16 in the upper right direction_-2But
It is determined whether or not the operation has been performed. And the scrolls
Itch 16_-2If is operated, it is displayed in step S204
Read center coordinates (X₁, Y ₁) In X coordinate direction
And ΔY in the Y coordinate direction.

[0046] Similar processing steps above scrolling switch 16 _-1, the upper right direction of the scroll switch 16 _-2 proceeds to step S205 if it is not operated in step S203, the scroll switch 16 in the upward direction in the step S205
It is determined whether _-1 has been operated. If the scroll switch _16-1 has been operated, the read center coordinates (X ₁ , Y ₁ ) of the display output screen 18 are added by ΔY in the Y coordinate direction in step S206.

Similarly, each of the scroll switches 16 _-8 ,
It is determined whether 16 _-7 , 16 _-6 , 16 _-5 , 16 _-4 has been operated, and the read coordinates are slightly changed.

The upper left scroll switch 16_-8Place
That is, in step S205, the upward scroll switch
Chi 16_-1If is not operated, proceed to step S207
Then, in step S207, the upper left scroll switch
16_-8It is determined whether or not has been operated. And the scroll
Switch 16_-8If has been operated, step S208
, The readout center coordinates (X ₁, Y₁) For X
Add − (minus) ΔX in the direction of the mark and move in the direction of the Y coordinate
Add by ΔY.

[0049] Unless the processing work steps S207 leftward scroll switch 16 _-7 is operated upper-left direction of the scroll switch 16 _-8 proceeds to step S209, the scroll switch 16 _-7 leftward in the step S209 is It is determined whether or not the operation has been performed. And the scroll switch
If 16 _-7 has been operated, the read center coordinates (X ₁ , Y ₁ ) of the display output screen 18 are set to −Δ in the X coordinate direction in step S210.
Add only X.

[0050] Unless scroll switch 16 _-7 leftward at the lower left scroll switch 16 _-6 processing operations step S209 in is operated proceeds to step S211, the scroll switch 16 _-6 lower left direction in the step S211 It is determined whether or not the operation has been performed. And the scroll switch
If 16 _-6 has been operated, the read center coordinates (X ₁ , Y ₁ ) of the display output screen 18 are set to −Δ in the X coordinate direction in step S212.
Add -ΔY in the X and Y coordinate directions.

[0051] Unless processing operations lower left scroll switch 16 _-6 in step S211 in downward scroll switch 16 _-5 is operated, the process proceeds to step S213, the scroll switch 16 _-5 downward at the step S213 is It is determined whether or not the operation has been performed. And the scroll switch
If 16 _-5 has been operated, the read center coordinates (X ₁ , Y ₁ ) on the display output screen 18 are set to −Δ in the Y coordinate direction in step S214.
Add only Y.

[0052] If the scroll switch 16 _-5 downward in the processing work step S213 in the lower right direction of the scroll switch 16 _-4 been operated the process proceeds to step S215, the lower right of the scroll switch 16 at the step S216 _- It is determined whether or not ₄ has been operated. And the scroll switch
If 16 _-4 has been operated, the read center coordinates (X ₁ , Y ₁ ) of the display output screen 18 are set to ΔX in the X coordinate direction in step S216.
, And −ΔY in the Y coordinate direction.

Upon completion of any of the above switch processing operations, the flow shifts to step S217, and a map is displayed centering on the obtained coordinates (X ₁ , Y ₁ ).

[0054]

In a device in which the display indicating the vehicle position is fixed near the center of the display screen and the display map is moved with the movement of the vehicle to indicate the current position of the vehicle, scrolling the display map causes The position of the vehicle will deviate from the correct position. Therefore, after scrolling the display map and referring to the road map, it is necessary to reset the position of the vehicle to the correct position on the display map.

FIGS. 9A and 9B are diagrams for explaining the problem of scrolling the display map. FIG. 9A shows a case where the vehicle traces the road on the display map, and FIG. 9B shows a display map. FIG. 7 is a diagram showing a case where is scrolled.

That is, in the state shown in FIG. 9A, the position 19 of the own vehicle is at the center position of the map displayed by the display 6, and
This is a case where the vehicle is traveling while tracing the road toward the front in the figure.

At this time, assuming that the scroll switch _16-3 is operated and the road map on the right side of the display map is referred to, the map displayed on the display 6 and the position 19 of the vehicle are as shown in FIG. ). Therefore, although the road map on the right side of the figure can be referred to, the position 19 of the vehicle deviates from the road on the display map.

Therefore, in order to receive navigation support from the navigation device after scrolling the display map and referring to the road map, it is necessary to reset the position 19 of the own vehicle to a correct position on the display map.

The technical problem of the present invention is to realize a navigation device in which the position of the vehicle on the display map does not change even when the display map is scrolled, thereby enhancing the road map reference function and supporting the navigation of the vehicle. The aim is to increase the power and support the realization of safer vehicles.

[0060]

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.

According to the present invention, the function of the scroll switch is switched by a function changeover switch to enable the function of setting the position of the vehicle on the display map and the scrolling of the display map without changing the position of the vehicle on the display map. There is a characteristic in giving the function.

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

Map data storage means 20 for 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. In addition, the own vehicle obtained from the own vehicle position detecting means 21 is 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 position of the vehicle and the map displayed on the display means 22

A function changeover switch 25 for giving an instruction to switch the function of the scroll switch 24 between a map movement function and a vehicle position movement function.

Based on the function selection command from the function changeover switch 25, the command from the scroll switch 24 is read as map movement or vehicle position movement, and the movement command is given to the display control means 23. Control means 27

(2) Apparatus configuration in which function switching is automatically restored, 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 function control means 27a in place of the function control means 27.

Based on the function selection command from the function changeover switch 25, the command from the scroll switch 24 is read as map movement or vehicle position movement, and the movement command is given to the display control means 23. The elapsed time from when the own vehicle position movement command is not input is measured by the timer 26, and after a predetermined time elapses,
Function control means 27a for reading the function of the scroll switch 24 as a map movement function

[0072]

(1) Basic device configuration In the navigation device of the present invention, the operation function of the scroll switch 24 can be switched by the function control means 27. That is, by operating the function changeover switch 25, the command when the scroll switch 24 is operated is re-read, and the command is given to the display control means.

That is, the commands are a command to move the map and a command to move the position of the own vehicle.

The command to move the map is a display means.
The command for scrolling the display map without changing the position of the vehicle on the display map 22 is the command for moving the position of the vehicle on the display map. That is, the former command is a command / function for referring to a road map, and the latter command is a command / function used for setting the own vehicle position on the display map.

Accordingly, the same scroll switch 24 can be used to set the position of the vehicle on the display map and to refer to the road map.

On the other hand, display control means receiving the above-mentioned command
23 is the coordinates for reading the map data (see Fig. 1 (b))
Is changed as follows according to the function switching.

That is, when setting the position of the own vehicle on the display map, map data is read centering on the coordinates (X ₁ , Y ₁ ) of the own vehicle, and a display output 18a is obtained. On the other hand,
When referring to the road map, the read center coordinates are changed from (X ₁ , Y ₁ ) to (X ₂ ,
The map data is read in place of Y ₂ ) to obtain a display output 18b.

When the position of the own vehicle on the display map is set, the coordinates of the map data read out when the scroll switch 24 is operated are changed, and the position 19 of the own vehicle displayed on the map data is displayed. Display control is performed so as to be fixed at the center of the read coordinates.

As a result, the navigation support power of the navigation device can be further enhanced.

(2) Device Configuration for Automatically Returning Function Switching In the navigation device of the present invention, the function of the scroll switch 24 is changed after a predetermined period of time elapses based on the time measured by the timer 26. Is read by the function control means 27a as a map movement function.

Therefore, the scroll switch in the normal state
The function 24 is a map movement function, and the vehicle position can be moved by the scroll switch 24 only when the function changeover switch 25 is operated.

When the operation of the scroll switch 24 is completed, the function of the scroll switch 24 automatically becomes the map moving function after a predetermined time.

That is, the purpose of scrolling the display map is generally to refer to the road map, which can further enhance the operability and navigation support of the navigation device.

[0084]

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 the present embodiment, the present invention is realized by using the configuration of the navigation device illustrated in FIG. 5 as it is. However, in detail, it is necessary to add a switch for giving a function switching command of the scroll switch. Accordingly, it is necessary to change the control program of the main microcomputer 1. In particular, a 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 function control means 27 (27) shown in FIG.
a) is realized on the software of the microcomputer system. Therefore, the display control means 23, the timer 26, and the function control means 27 (27a) surrounded by broken lines in FIG. 1A are realized on the main microcomputer 1 in FIG.

FIG. 2 is a diagram for explaining an embodiment of the configuration of the operation switch, and is a diagram of the configuration of the operation switch viewed from the front of the keyboard.

[0088] That is, as the operation switch 4, in addition to the scroll switch 16 _-1 to 16 _-8, which is additionally provided a configuration the function selector switch 28.

(2) Operation 1) Main Routine FIG. 3 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. 7 in steps S306 to S308.

That is, a count operation of a 10-second timer is provided in step S306, and if the count of 10 seconds has been completed in step S307, the map center mode is set in step S308. The map center mode means that the processing of the scroll switch is processed as a map moving function. Then, in step S309, a message "map" is displayed on the display to indicate that the mode is the map center mode.

The timer processing of steps S306 to S309 is performed in conjunction with the operation of the function changeover switch and the scroll switch described below.

2) Processing of function changeover switch (see FIGS. 4 (a) and 1 (b)) FIG. 4 is a diagram for explaining the operation of the embodiment, and FIG. YAC I
An I chart and (b) are YAC II charts for explaining a processing operation of a scroll switch.

That is, the program shown in FIG. 4A is executed when the function changeover switch is operated.
In step S401, it is determined 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 S402, and the scroll switch process is started.
In step S403, 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.

Then, in step S404, the read coordinates (X ₁ , Y ₁ ) of the center of the vehicle, which is the center of the display screen at that time, are entered into the read coordinates (X ₂ , Y ₂ ) of the map center.

If it is determined in step S401 that the vehicle is in the map center mode instead of the vehicle center mode, the flow shifts to step S405 to set the vehicle center mode (set a flag) and start the scroll switch processing. Subsequently, in step S405, the message "map" displayed on the display to indicate the vehicle center mode is deleted.

Then, in step S407, the read center coordinates in the map data space 17a are set as the read coordinates (X ₁ , Y ₁ ) of the own vehicle center.

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

3) Scroll switch processing (FIG. 4B)
(See FIG. 1 and FIG. 1 (b).) The processing operation of the scroll switch shown in FIG.
It is a process when the scroll switch 16 _-1 is operated in (a). That is, the process is performed when a scroll operation is performed in the Y coordinate direction on the map data space.

[0102] processing operation of the scroll switch 16 _-1 Y coordinate direction, first, it is determined whether the vehicle center mode in step S501, step S50 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 S503, 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.

[0103] On the other hand, if it is determined that the map center mode in step S501, adds the _{ΔY (Y 2 = Y 2 +} ΔY) to the coordinates Y ₂ when reading the map step S504. Then, in step S505, the coordinates (X ₂ , Y ₂ ) obtained from the result of the addition are read out and displayed as 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.

If the scroll switch (16 _{-1 to} 16 _-8 ) has not been operated after the above switch processing is completed, a 10-second timer is started in step S506. This timer is the timer in step S306 shown in FIG.

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

The 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.

[0108] 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 _{S502, Y 2 = Y 2 +} ΔY → step S504

[0109] corresponds to the corresponding X ₂ = X ₂ + ΔX → step S504 to the processing X ₁ = X ₁ + ΔX → step S502 the scroll switch 16 _-3

Processing of scroll switch _16-4 X ₁ = X ₁ + ΔX, Y ₁ = Y ₁ −ΔY → corresponding to step S502 X ₂ = X ₂ + ΔX, Y ₂ = Y ₂ −ΔY → corresponding to step S504

[0111] corresponds to the equivalent Y ₂ = Y ₂ -ΔY → step S504 in the processing Y ₁ = Y ₁ -ΔY → step S502 the scroll switch 16 _-5

[0112] processing of the scroll switch _{16 -6 X 1 = X 1 -ΔX} , Y 1 = Y 1 -ΔY → step S502 to corresponding X ₂ = X ₂ -ΔX, corresponds to Y ₂ = Y ₂ -ΔY → step S504

[0113] corresponds to the equivalent X ₂ = X ₂ -ΔX → step S504 to processing X ₁ = X ₁ -ΔX → step S502 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 S502 X ₂ = X ₂ −ΔX, Y ₂ = Y ₂ + ΔY → corresponding to step S504

(3) Other Embodiments In the above embodiment, even if the function changeover switch is operated to set the vehicle center mode, 10 seconds after the scroll switch (16 _{-1 to} 16 _-8 ) is no longer operated.
c After a lapse, the mode automatically switches to the map center mode.

If such specifications are unnecessary, steps S306 to S309 in the main routine shown in FIG. 3 and step S506 in the scroll switch processing shown in FIG. 4B should be deleted. I just need.
That is, the processing related to the timer may be deleted.

As a result, every time the function changeover switch is operated, the map center mode and the vehicle center mode can be alternately switched.

However, since the vehicle center mode is used only when the position of the vehicle is set on the display map, in practice, as in the above-described embodiment, the control method is such that the map center mode is normally automatically set. It is advisable to use

[0119]

As described above, according to the navigation apparatus of the present invention, by providing the function changeover switch, the function of moving the display map to one set of scroll switches and the function of moving the position of the vehicle are provided. Can be given two functions.

Therefore, a navigation device is realized in which the position of the vehicle on the display map does not change even if the display map is scrolled, and the road map reference function is enhanced and the navigation support power of the vehicle is enhanced.

As a result, if the navigation device of the present invention is mounted on a vehicle, it is possible to support the realization of a safer vehicle.

[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 illustrating a configuration example of an operation switch, and is a diagram of the configuration of the operation switch as viewed from the front of a keyboard.

FIG. 3 is a diagram illustrating the operation of the embodiment, and is a YAC II chart illustrating a main routine of a main microcomputer.

FIG. 4 is a diagram for explaining the operation of the embodiment. FIG.
An I chart and (b) are YAC II charts for explaining a processing operation of a scroll switch.

FIG. 5 is a block diagram illustrating a configuration of a navigation device.

6A and 6B are diagrams illustrating an example of the arrangement of a scroll switch and a display editing screen, wherein FIG. 6A is a diagram illustrating an example of the arrangement of a scroll switch as viewed from the front of a keyboard, and FIG. FIG. 5 is a diagram expressing a logical model on a map data space on a memory.

FIG. 7 is a YAC II chart illustrating a main routine of a conventional main microcomputer.

FIG. 8 is a YAC II chart for explaining a processing operation of a conventional 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 tracing a road on the display map, and FIG. FIG.

[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-
Only Memory) 9 Decoder 10 CD-ROM control microcomputer 11 Wheel speed sensor 12 Geomagnetic sensor 13 Location calculation microcomputer 14 Navigation device 16 _{-1 to} 16 _-8 scroll switch 17 (17 _{-1 to} 17 _-9 ) Display edit screen (display edit) 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 detection means 22 Display means 23 Display control means 24 Scroll switch 25 Function changeover switch 26 Timer 27 , 27a Function control means 28 Function switch

Claims (2)

(57) [Claims] 1. Map data storage means (20) for storing map data, and own vehicle position detecting means (21) for detecting the position of the own vehicle
A display means (22) for drawing a map and a position of the vehicle; reading out necessary data by accessing the map data storage means (20); and displaying the map on the display means (22). In addition, the vehicle position obtained from the vehicle position detection means (21) is displayed on the display means (2).
Display control means (2) superimposed and displayed on the map displayed in (2).
3) a map moving function of moving the display map without changing the position of the vehicle on the display of the display means (22); and a function of moving the position of the vehicle on the display of the display means (22). A vehicle position moving function, a scroll switch (24) for giving a command for moving the map displayed on the display means (22) and the position of the vehicle, and a function of the scroll switch (24). A function changeover switch (25) for giving a command to switch between the function and the own vehicle position moving function;
Based on the function selection command from the function changeover switch (25), the command by the scroll switch (24) is read as map movement or vehicle position movement, and the movement command is given to the display control means (23). A navigation device comprising: control means (27). 2. Map data storage means (20) storing map data; and own vehicle position detecting means (21) for detecting the position of the own vehicle.
A display means (22) for drawing a map and a position of the vehicle; reading out necessary data by accessing the map data storage means (20); and displaying the map on the display means (22). In addition, the vehicle position obtained from the vehicle position detection means (21) is displayed on the display means (2).
Display control means (2) superimposed and displayed on the map displayed in (2).
3); a scroll switch (24) for giving a command for moving the map and the position of the vehicle displayed on the display means (22); and a position of the vehicle on the display of the display means (22). A map movement function for moving the display map without changing; a vehicle position movement function for moving the position of the vehicle on the display of the display means (22); and a map movement function for the scroll switch (24). And a function changeover switch (25) for giving a command to switch to the vehicle position moving function, a timer (26) serving as a reference for elapsed time measurement, and a function selection command by the function changeover switch (25). The command from the scroll switch (24) is read as map movement or vehicle movement, and the display control means (2) is read. ), And the timer (26) measures the time elapsed since the input of the own vehicle position movement command by the scroll switch (24) is stopped, and after the predetermined time elapses, Is the scroll switch (24)
And a function control means (27a) for reading the function as a map movement function.