JPH07318360A - Navigation apparatus for vehicle-mounting - Google Patents

Abstract

PURPOSE:To obtain a navigation apparatus in which a map image containing a part of running-path data instructed by the automatic display of a running path is plotted together with the running path while it is rewritten from one end side up to the other end side of the running path and in which the location of a desired point is confirmed or a route between desired points is decided quickly. CONSTITUTION:When the automatic display of a starting point up to a destination is instructed, a distance computation part 14 checks the accumulated running distance of a running path, and it instructs a map-image plotting part 15 to rewrite a map image. The plotting part 15 reads out starting-point data out of running-path data designated from a running-path memory 12, it plots a map image in a video RAM 16, it selects all pieces of position data situated in a plotted map region, and it plots a running path by a broken line so as to be overlapped with the map image. The image in the RAM is read out by an image conversion part 18, and it is output to a CRT display device 4 so as to be displayed on a screen. After that, the map image, the running path and a mark are rewritten in such a way that positions indicated by the running path data and the position data are situated in the center of a screen at every definite time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted navigation device, and more particularly to a vehicle-mounted navigation device capable of determining a route and confirming a place on a map when traveling from one point to another point. Navigation device.

[0002]

2. Description of the Related Art There is a vehicle-mounted navigation device that displays a vehicle position on a map image to provide driving guidance.
With the spread of the highway network, it is now possible to easily drive long distances.By using an on-vehicle navigation device, it is possible to drive on the road without mistakes even in strange areas, and to bypass traffic congestion appropriately. It has excellent convenience.
In this vehicle-mounted navigation device, a vehicle position is detected by satellite navigation or self-contained navigation, map data including the vehicle position is read from a map data storage medium such as a CD-ROM, an IC memory card, etc., and a map image including the vehicle position is displayed on the screen. Is drawn, and a vehicle position mark is drawn so as to overlap a portion corresponding to the vehicle position on the map image.

By the way, even at a customer's house, a friend's house, a sightseeing spot, etc., which has been once visited by car from home or office in the past, if time passes or the road is complicated, a place or a traveling route. If you forget and try to go to the same place again, it will take time and effort to check the place and driving route. In order to solve this, the vehicle-mounted navigation device stores information about the route the vehicle has traveled in the past,
There is a function of recording / displaying a traveling locus to be displayed on a map image according to the driver's request, so that the driver can easily reach a desired destination.

Specifically, every time the vehicle travels a certain distance, from the start of recording the traveling locus at a certain departure place to the end of recording at a certain destination, the vehicle position at that time Data is sequentially additionally stored in the buffer area of the travel locus memory, and the recording start date and time and recording end date and time input from the GPS receiver and the like are also stored. When the traveling locus memory has a plurality of channel areas for storing the traveling locus data for each channel, when the channel number is designated and writing is instructed, the current traveling locus data temporarily stored in the buffer area is recorded at the recording start date and time, It is preset to the specified channel together with the recording end date and time. The traveling locus data of other routes can be stored in other channel areas of the traveling locus memory. After that, from a certain starting point to a certain destination that has previously recorded the traveling trajectory, determine the route by referring to the previous driving route or the road between the starting point and the destination, or the starting point or the destination. When it is desired to confirm the location of the vehicle, the channel in which the desired traveling locus data is stored is designated and the traveling locus is called. Then, the traveling locus data of the designated channel is read out from the traveling locus memory, and the traveling locus is drawn on the map image based on the traveling locus data with a broken line. It is possible to easily confirm whether or not there is another optimal route different from the route that was set.

[0005]

However, since the user usually uses an enlarged map image that can see small roads as well as small roads and small roads, if the departure point and the destination are far away, 1 The map image of the size of the screen does not fit all the traveling loci, and you can check the location of the departure place and the destination, the past traveling route from the departure place to the destination and the surrounding roads, up, down, left, The right key has to be used for scrolling to scroll the map image from the starting point to the destination, which is a time-consuming task.
In particular, if you forget which channel the desired travel path data is stored in, you must call up the travel path for each channel and perform map scrolling operations to find the desired starting and destination locations and the desired destination. It was very inconvenient because it was not possible to determine the travel route connecting the origin and destination. In view of the above, an object of the present invention is to provide a vehicle-mounted navigation device capable of quickly and easily confirming the location of a desired point or determining a route between desired points when a driver tries to travel from a certain point to another point. It is to be.

[0006]

According to the present invention, there is provided the above-mentioned object, a map information storage means for storing map information, a vehicle position detecting means for detecting a vehicle position, a display means for displaying a map image, and map information. A map image drawing means for drawing a map image using the map information stored in the storage means and displaying it on the display means, a travel locus data storage means for storing a plurality of travel locus data, and a certain starting point. In a vehicle-mounted navigation device equipped with a traveling locus registration means for receiving a recording instruction of a traveling locus to a destination and registering a vehicle position data string between a departure place and a destination as traveling locus data in the traveling locus data storage means. An operating means for instructing a user to automatically display a desired traveling locus is provided, and the map image drawing means, when the automatic display of the desired traveling trajectory is instructed by the operating means, A map image containing a part of the running locus is included in the map image by using the running locus data desired by the user stored in the line locus data storage means and the map information stored in the map information storage means. This is achieved by rewriting so that the traveling locus changes continuously or discontinuously from one end side to the other end side of the traveling locus while drawing along with the traveling locus and displaying it on the display means.

[0007]

According to the present invention, when the user gives an instruction to automatically display a certain traveling locus, the traveling locus data instructed by the user stored in the traveling locus data storage means and the map information stored in the map information storage means are displayed. While referring to the map image containing a part of the traveling locus so that the traveling locus contained in the map image changes continuously or discontinuously from one end side to the other end side of the traveling locus, It is drawn and displayed along with the running track. This allows the user to press the up, down, left, and right keys to perform no map scroll operation when the starting point, which is one end of the travel path, is far away from the destination, which is the other end of the travel path. In addition, it is possible to automatically display the starting point and the destination, and the driving route between the starting point and the destination along with the surrounding roads on the screen over the entire length of the previous driving route, and to quickly and easily confirm the location and determine the route. It can be carried out. Also, even if you do not know which of the multiple travel paths you want to travel this time, you can quickly find the desired travel path, confirm the whereabouts and determine the route, simply by instructing the automatic display for each travel path. it can.

According to another aspect of the invention, the map image drawing means slows down the map moving speed by rewriting the map image when drawing the map image including the traveling loci near the departure place and the destination. , When drawing a map image that includes a traveling locus other than near the starting point and near the destination, the map moving speed is increased by rewriting the map image. This makes it possible to complete the automatic scrolling of the map in a short time when the departure point-destination is extremely far away, and to accurately check the starting point and the destination on the slowly moving map image. You can confirm the location.

According to still another aspect of the invention, the map image drawing means enlarges the scale when drawing the map image including the traveling loci near the starting point and near the destination, and sets the object near the starting point. Reduce the scale when drawing a map image that contains a travel path other than near the ground. As a result,
When the destinations are very far apart, it is possible to find an optimum traveling route connecting the departure place and the destination from a wide area. Then, it is possible to confirm the exact place of departure and destination on the detailed map image.

According to another aspect of the present invention, the map image drawing means draws only the map image containing the traveling loci near the departure place and the destination. As a result, the locations of the desired starting point and destination can be quickly confirmed on the map.

According to another invention, map information storage means for storing map information, vehicle position detection means for detecting a vehicle position, display means for displaying a map image, and map information storage means are stored. In a vehicle-mounted navigation device equipped with a map image drawing means for drawing a map image using the map information and displaying it on a display means, an operation means for instructing automatic display between two points desired by the user is provided, and the map The image drawing means uses the map information stored in the map information storage means when the automatic display between the two points desired by the user is instructed by the operation means, and includes a part of the straight line connecting the two points. The image is redrawn so that the straight line connecting the two points in the map image changes continuously or discontinuously from one end side to the other end side of the two points, and is displayed together with the marks of the two points and displayed. To be displayed on the stage. As a result, when the user tries to travel from a certain point to another certain point, the user can connect the two points without pressing the up, down, left, right keys to perform the map scroll operation. The entire length of the straight line can be automatically displayed on the screen together with the road near the straight line connecting both points and the point, and the location confirmation and route determination can be performed quickly and easily.

According to another aspect of the invention, the map image drawing means slows down the map moving speed by rewriting the map image when drawing the map image including the vicinity of the two points, and does not include the vicinity of the two points. When drawing, the map moving speed is increased by rewriting the map image. As a result, when the two points are extremely far apart, the automatic scrolling of the map can be completed in a short time, and the two points can be accurately confirmed on the slowly moving map image. .

According to another aspect of the invention, the map image drawing means enlarges the scale of the map image when drawing the map image including the two points or near the two points, and draws the map image away from the two points. When doing, reduce the scale of the map image. As a result, when the two points are extremely far apart, it is possible to find an optimum traveling route connecting the two points from a wide area. Then, it is possible to confirm the exact locations of the two points on the detailed map image.

According to another invention, the map image drawing means enlarges the scale of the map image when drawing the first and last map images, and draws the map images other than the first and last map images. Reduce the scale of the image. As a result, when the two points are extremely far apart,
It is possible to find the optimal driving route connecting the points, and it is possible to complete the automatic scrolling of the map in a short time. Then, it is possible to confirm the exact locations of the two points on the detailed map image.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram of a vehicle-mounted navigation device according to a first embodiment of the present invention. 1 is CD-RO
M, which stores map data divided into predetermined longitude widths and latitude widths according to scale. Reference numeral 2 denotes an operation panel, which includes menu call keys, enlargement / reduction keys, cursor operations, up / down / left / right keys for performing map scrolling, a recording start key and a recording end key for running trajectory recording, and an execution key. And so on. A GPS receiver 3 detects the vehicle position by satellite navigation using GPS satellites, and periodically detects the vehicle position (longitude, latitude) and the vehicle direction, and outputs the vehicle position data and the vehicle direction data. The GPS receiver 3 also outputs date / time data received from GPS satellites. Reference numeral 4 denotes a CRT display device, which displays a map image around the vehicle position on the screen together with a vehicle position mark and a traveling locus, and a map image automatically moving along a past traveling locus together with the traveling locus, Display the menu image.

Reference numeral 10 denotes a navigation controller having a microcomputer structure, and based on the vehicle position data detected by the GPS receiver 3, a map image around the vehicle position is used together with a vehicle position mark and a traveling locus by using the map data of the CD-ROM 1. The image is drawn and displayed on the screen of the CRT display device 4, or the map image moving along the past running locus is drawn together with the running locus and displayed on the screen. Reference numeral 11 denotes a buffer memory for temporarily storing the map data read from the CD-ROM 1. Reference numeral 12 denotes a buffer area and traveling locus data composed of position data strings for channels 1 to 5 as shown in FIG. It is a running locus memory that has 5 channel memory areas that store the date and time of month, the date and time of recording end, and the cumulative distance, so that data can be saved even after the power of the set is turned off by using a battery backup or EEPROM. Has become.

Reference numeral 13 is a GPS in which the vehicle position when the recording start key is pressed is the starting point in the traveling locus recording mode.
The distance calculation unit for calculating the cumulative traveling distance of the vehicle detected by the receiver 3, 14 is the date and time input from the GPS receiver 3 at that time when the recording start key is pressed in the traveling locus recording mode. The data is stored in the buffer area of the traveling locus memory 12 as recording start date and time data, and thereafter,
Each time the cumulative mileage calculated by the distance calculation unit 13 increases by 0.3 km until the recording end key is pressed, the vehicle position data at that time is sequentially stored in the buffer area of the travel locus memory 12 and traveled. When the recording end key is pressed lastly as the trajectory data, the date and time data input from the GPS receiver 3 at that time is stored in the buffer area of the traveling trajectory memory 12 as the recording end date and time data. The cumulative traveling distance input from the distance calculation unit 13 is also stored in the buffer area. After that, when the channel number is designated and the execution key is pressed in the traveling locus memory mode, the data stored in the buffer area is written and preset in the channel memory area of the designated channel.

Reference numeral 15 denotes a map image drawing unit which inputs the vehicle position data and the vehicle direction data detected by the GPS receiver 3 in the normal navigation mode, and the CD-RO.
A video, which will be described later, displays map data around the vehicle position at a scale specified by the user with the enlargement / reduction key from M1 to the buffer memory 11 and uses the read map data to center the vehicle position. It is drawn in the RAM and the vehicle position mark is also drawn. Further, in the traveling locus recording mode, the traveling locus with the broken line is drawn on the map image centered on the vehicle position based on the traveling locus data stored in the buffer area of the traveling locus memory 12, and the vehicle position mark is also drawn. . Further, in the departure point-destination automatic display mode, the traveling locus data of the channel designated by the user and the C
Using the map data at a scale specified by the user and stored in the D-ROM 1, a map image including a part of the traveling locus is provided, and the traveling locus included in the map image is from the one end side to the other end of the traveling locus. Drawing along with the running trajectory while rewriting so that it continuously changes to the side.

Reference numeral 16 denotes a video RAM which has a storage area for one screen and which stores a map image, a menu image and a traveling locus list image, and a video RA which stores the menu image together with a cursor mark when the menu is called.
When drawing on M16 or when the running locus recording is completed and the running locus memory mode is entered, or when the starting point-destination automatic display is selected from the menu, the running locus memory 12 is referred to for each channel. , Draws a travel locus list indicating the recording start date and time, and the recording end date and time, or draws the accumulated travel distance after the recording start key is pressed in the lower end portion of the video RAM 16 in the travel locus recording mode. A character drawing unit, 18 is a video conversion unit that reads out the image drawn in the video RAM 16 and converts it into a predetermined video signal and outputs it to the CRT display device 4.

3 to 8 are flow charts showing the operation of the navigation controller 10, FIG. 9 is an explanatory view of the data stored in the traveling locus memory, FIG. 10 is an explanatory view of the starting point-destination automatic display operation, and FIG. FIG. 12 is an explanatory diagram of screen display examples, and description will be given below with reference to these figures. In addition,
It is assumed that the traveling locus data are already preset in channels 1 to 5 of the traveling locus memory 12 together with the recording start date and time, the recording end date and time, and the accumulated traveling distance (see FIG. 2).

Normal navigation mode After the power is turned on, the GPS receiver 3 periodically detects the current vehicle position, vehicle azimuth, date and time, and outputs these data to the navigation controller 10. On the other hand, the navigation controller 10 is powered on and enters a normal navigation mode (step 101 in FIG. 3), and the map image drawing unit 15 sets the scale data A to the minimum scale where the map data is prepared in the CD-ROM 1 (step). 1
02). Then, from the GPS receiver 3, vehicle position data,
The vehicle orientation data is input, the map data of the scale A including the vehicle position is read from the CD-ROM 1 to the buffer memory 11, and the map image for one screen centered on the vehicle position based on the read map data is stored in the video RAM 16 Drawing (steps 103 and 104), and further, the video RAM1
A vehicle position mark whose vehicle azimuth direction is directed to the center of 6 is drawn (step 105). The image drawn in the video RAM 16 is read by the video conversion unit 18, output to the CRT display device 4 and displayed on the screen (step 106).

After that, it is checked whether or not the scale change operation is performed by the user with the enlargement / reduction key (step 107). If yes, A is changed according to the operation (step 108), and if not, A is changed. Is left as it is (NO in step 107). Further, it is checked whether or not the user has performed a menu call operation (step 109), and if not, the process returns to step 103 to repeat the same processing. Therefore, a map image centering on the vehicle position is displayed on the screen together with the vehicle position mark, and the map image on the screen scrolls as the vehicle moves, so that the user can always confirm the own vehicle position on the map. it can.

Running Locus Recording Mode When the user wants to store the running locus during traveling from a certain starting point to a certain destination, first, the menu calling key is pressed to perform a menu calling operation (step 1).
09). Then, the character drawing unit 17 draws a predetermined menu image in the video RAM 16 and also draws a cursor mark in the first column (step 110). The image in the video RAM 16 is read by the video conversion unit 18, converted into a video signal, and output to the CRT display device 4, as shown in FIG.
Since the menu is displayed as in (1) (step 201 in FIG. 4), the down key is pressed once to bring the cursor to the second column, and then the execute key is pressed to select the menu for recording the traveling locus. . Then, the navigation controller 1
0 is the traveling locus recording mode (steps 202 to 20).
4).

After that, when the user presses the recording start key at the departure point, first, the traveling locus recording unit 13 uses the date and time data input from the GPS receiver 3 at that time as the recording start date and time data. It is stored in the buffer area of the memory 12, and the vehicle position data input from the GPS receiver 3 is stored as the first position data (departure point data) of the traveling locus (steps 205 and 206). After this, the navigation controller 10 periodically returns to G
Vehicle position data and vehicle azimuth data are input from the PS receiver 3 (step 207), and the distance calculation unit 14 starts from the starting point, and thereafter, each time vehicle position data is input from the GPS receiver 3, the preceding and following vehicles are input. The distance between the positions is calculated and the cumulative running distance from the starting point is calculated, and the cumulative running distance data is stored in the buffer area of the running locus memory 12 (step 208). Also, each time the cumulative running distance increases by 0.3 km, A recording command is given to the running locus recording unit 13, and the running locus recording unit 13 additionally stores the vehicle position data input from the GPS receiver 3 at that time in the running locus memory 12 in order as position data forming a running locus (step Two
09, 210, see FIG. 2).

On the other hand, the map image drawing section 15 is a CD-ROM.
The map data of reduced scale A including the vehicle position from 1 is read out to the buffer memory 11, and the map image for one screen centered on the vehicle position is video RAM based on the read map data
16 and then, from the travel locus data stored in the buffer area of the travel locus memory 12, the current video R is displayed.
The position data included in the map area drawn on the AM 16 is selected, the traveling locus is drawn on the map image with a broken line, and a departure place mark is made at a place corresponding to the departure place of the map image. Then, a vehicle position mark with the vehicle azimuth direction oriented is drawn at the center of the video RAM 16 (steps 301 and 302 in FIG. 5). Subsequently, the character drawing unit 17 reads the accumulated traveling distance data stored in the buffer area of the traveling locus memory 12, and displays the characters indicating the accumulated traveling distance on the video RA.
Drawing is performed at the lower end of M16 (step 303). The image drawn in the video RAM 16 is read by the video conversion unit 18 and output to the CRT display device 4.
Therefore, the map image centering on the vehicle position is displayed on the screen together with the vehicle position mark and the traveling locus (step 304, see FIG. 11 (2)).

After that, when the user presses the recording end key at the place where the destination is reached, the date and time data entered by the traveling locus recording unit 13 from the GPS receiver 3 at that time is used as the recording end date and time data. It is stored in the buffer area of the traveling locus memory 12 and the additional writing of the vehicle position data is stopped (steps 305, 306). At this time, the navigation controller 10 enters the traveling locus memory mode (step 307), and the character drawing unit 17 stores the recording start date and time data stored in the buffer area of the traveling locus memory 12 and the channel memory areas 1 to 5 and the recording end. Video RAM for running locus list image using date data
16 and the cursor mark is drawn in the first column, and the traveling locus list is displayed on the screen as shown in FIG. 11C (steps 308 and 309). For example, when the user wants to preset to channel 2, the down key is pressed twice to move the cursor to the third column, and the execute key is pressed to perform the preset operation. Then, the traveling locus recording unit 13 writes the data temporarily stored in the buffer area into the 2-channel memory area and presets the traveling locus data of this time (steps 310 and 311; see FIG. 9). after this,
The navigation controller 10 returns to the normal navigation mode (step 312, step 10 of FIG. 3).
3). When the execution key is pressed while the cursor is in the first column, the normal navigation mode is restored without presetting to the channel memory area.

Departure place-Destination automatic display mode The user can check the location of a departure place or a destination by looking at a map from a certain departure place where a travel locus was recorded in the past to a certain destination. When you want to decide the optimal driving route,
The menu call key is pressed to display the menu screen as shown in FIG. 11A, the cursor is moved to the third column, and the execute key is pressed. Then, the character drawing unit 17 draws the traveling locus list image in the video RAM 16 using the recording start date / time data and the recording end date / time data stored in the channel 1 to 5 areas of the traveling locus memory 12, and the cursor mark is displayed. Is drawn in the first column and the traveling locus list is displayed on the screen as shown in FIG. 12 (1) ((step 1 of FIG. 3
09, 110, steps 201 to 203 in FIG. 4, and steps 401 to 403 in FIG. Then, if the running locus desired by the user is for one channel, or if it is not known which channel and wants to check the running locus for channel 1 without competing, the execution key is pressed as it is, and the departure point for which channel 1 is designated. -Instruct to automatically display the destination (step 404).

Then, the navigation controller 10
Is the starting point-destination automatic display mode (step 40
5) First, the distance calculation unit 14 checks whether the accumulated traveling distance of the traveling locus of channel 1 is equal to or more than a certain distance L ₀ (step 406). If NO, the map image drawing unit 1
5 instructs the rewriting of the map image in the first mode (step 407), if L ₀ or more, in the traveling locus data, a position closest data accumulated travel distance from the starting point is the L _0/2 Number m ₁ of the cumulative traveling distance from the destination is L ₀
The number m _{2 of the} position data closest to / 2 is obtained, and the map image drawing unit 15 is instructed to rewrite the map image in the second mode together with m ₁ and m ₂ (step 408).

When the first mode is instructed, the map image drawing section 15 first sets m indicating the number of the position data to 1 (step 409), and sets 1 designated from the traveling locus memory 12.
Of the traveling locus data of the channel, the m-th position data (here, the starting point data) is read out, and the CD-ROM 1 is read.
The map data of the reduced scale A including the m-th position is read out, the map image centering on the m-th position is drawn in the video RAM 16 using the map data (step 410), and the travel locus memory All the position data included in the map area drawn in the video RAM 16 this time is selected from the running locus data of channel 1 of 12, and the running locus is drawn on the map image with a broken line. Then, when the starting point or the destination is included in the map image, these marks are drawn (the starting point mark is drawn at first). The image in the video RAM 16 is the image conversion unit 1.
8 is read out, converted into a video signal, output to the CRT display device 4, and displayed on the screen (steps 411 and 412, see FIG. 12 (2)). This allows
On the screen, the first part of the running track of channel 1 is displayed together with the departure point mark and a map of the surrounding area, so you can see where the departure point of channel 1 was and which route you took from. I understand.

After that, the map image drawing unit 15 indicates that the number m is the last position data number m of the traveling locus data of channel 1.
Check if it matches _L (step 50 in FIG. 7).
1) When they do not match, m ← m + a (a is a fixed integer value of 1 or more) is set (when m exceeds m _L , m ← m + a
_ml . However, m _L is the number of the position data related to the destination),
After a certain short time τ _{1 has} passed (steps 502 and 503),
Returning to step 410 of FIG. 6, the same processing is repeated, and the map image, the traveling locus, and the mark are rewritten so that the position indicated by the position data of every “a” of the traveling locus data becomes the screen center at regular intervals. Go. When a destination is entered on the map image, a destination mark is drawn at the corresponding location and displayed on the screen (see FIG. 12 (3)). Based on the last position data (destination data) of the traveling locus data, when the map image, the traveling locus, and the departure point mark are rewritten so that the destination is in the center of the screen, after a certain period of time has passed, the navigation controller 10 operates normally. Return to the navigation mode (step 504 in FIG. 7).

In this way, in the first mode, the map image containing a part of the running locus designated by the user is displayed from the one end side to the other end side of the running locus in the map image. While rewriting so that it changes continuously, it is drawn and displayed together with the traveling trajectory, the departure point mark, and the destination mark. This allows the user to press the up, down, left, and right keys to perform no map scroll operation when the starting point, which is one end of the travel path, is far away from the destination, which is the other end of the travel path. Also, by automatically scrolling the map at a constant speed, it is possible to display the starting point and the destination and the driving route between the starting point and the destination along with the surrounding roads on the screen over the entire length of the previous driving route. Moreover, it is possible to easily confirm the whereabouts of the departure place and the destination and determine the route. To determine the route, if the travel route at the time of recording the previous travel trace was appropriate, select the route, and if it takes time, select a route different from the one at the time of recording the travel trace on the map. Good. Note that if a is set to 1 in step 502 of FIG. 7, the map image can be continuously scrolled, and if a is set to 2 or more, for example, 5, the map image can be automatically scrolled discontinuously and quickly.

Unlike this, the map image drawing unit 15 is shown in FIG.
When the second mode is instructed in step 408 of
With m = 1 (step 413), the m-th position data (departure point data) of the specified one-channel traveling locus data is read from the traveling locus memory 12, and the CD-R is read.
The map data of the scale A including the m-th position is read from OM1 and the video RAM 16 is read using the map data.
, Draws a map image centered on the departure point, and selects all position data in the map area drawn in the video RAM 16 this time from the running locus data of the designated channel of the running locus memory 12, The running locus is drawn with a broken line overlaid on the map image. Then, when the starting point and the destination are included in the map image, these marks are drawn (the starting point mark is initially drawn). Video ram
The image 16 is read by the video converter 18, converted into a video signal, output to the CRT display device 4, and displayed on the screen (see FIG. 12 (2)).

After that, the map image drawing unit 15 sets m = m _L
Check (step 504) and it is NO so m
After setting ← m + a (step 505), it is checked whether m ₁ <m (step 506). If NO, a certain time τ
After _one lapse of time (step 507), the process returns to step 501 to read the m-th position data of the traveling locus data of channel 1, draw a map image centering on the m-th position in the video RAM 16, and All position data included in the map area drawn in the video RAM 16 this time is selected from the running track data of the channel, the running track is drawn with a broken line so as to be superimposed on the map image, and the starting point or the purpose is further drawn on the map image. If there is a ground, draw these marks at the corresponding places. As a result, the map image on the screen, the traveling locus, and the mark scroll together. Thereafter, in the same manner, every time a fixed time has elapsed, the map image, the traveling locus, and the mark are rewritten so that the position indicated by the position data next to the traveling locus data becomes the screen center, and the map is scrolled slowly. Thus, the location of the departure place and the road around the departure place can be correctly grasped.

After that, when YES at step 504, it is checked whether m ₂ <m (step 508) and NO.
If so, after τ ₂ shorter than τ ₁ has elapsed (step 50
9), the m-th position data is read out, and the video RAM
16 draws a map image centering on the m-th position (step 501), and this time, from the travel locus data of channel 1 of the travel locus memory 12, the video RAM 16 is selected.
Select all the position data in the map area drawn in, draw the running locus with a broken line on the map image, and if the map image contains the starting point or destination,
These marks are drawn at the corresponding places and displayed on the screen (steps 502 and 503). Similarly, every time a certain period of time elapses, the map image, the traveling locus, and the position indicated by the position data next to the traveling locus data become the screen center.
Rewrite the mark and scroll the map at high speed. As a result, it is possible to grasp the traveling path between the departure point and the destination and the surrounding roads in a short time.

After that, when m ₂ <m, the map image drawing unit 15 determines YES in step 508, and after τ _{1 has} elapsed (step 507), the m-th position data is read out and stored in the video RAM 16. A map image centered on the m-th position is drawn, and from the traveling locus data of channel 1 of the traveling locus memory 12, this time, the video RAM
All position data in the map area drawn in 16 are selected, the running locus is drawn on the map image with a broken line, and if the map image contains the starting point or the destination, these marks are displayed. It is drawn at the corresponding place and displayed on the screen (steps 501 to 503). Similarly, every time a certain period of time has passed, the map image, the traveling locus, and the mark are rewritten so that the position indicated by the next position data of the traveling locus data is the screen center, and the map scrolls at the original slow speed. Let As a result, the traveling locus near the destination and the surrounding roads can be surely grasped. Based on the last m _L- th position data (destination data) of the traveling locus data, when the map image, traveling locus, and departure point mark are rewritten so that the destination is in the center of the screen, after a certain period of time, the navigation controller 10 returns to the normal navigation mode (step 510).

In this way, in the second mode, the map image containing a part of the running locus designated by the user is displayed from the one end side to the other end side of the running locus in the map image. While rewriting so that it changes continuously, it draws and displays along with the running trajectory, departure point mark, and destination mark, and the map image is rewritten at a short interval between the departure point and the destination to scroll the map at high speed. Therefore, the map scroll can be completed in a short time even when the departure place and the destination are far apart (see FIG. 10). If NO in step 508, step 5
Before proceeding to 09, it is possible to speed up map scrolling by setting m ← m + b (b is a fixed integer value of 1 or more) and waiting τ ₁ in step 509.

If the running locus data of channel 1 is different from the one the user is trying to check this time,
After returning to the normal navigation mode, set the departure point-destination automatic display mode again, and by specifying channels 2 and later in order, you can easily and quickly find out where the departure point and destination of each channel are, and then select While finding the traveling locus connecting the starting point and the destination of the
It is possible to determine a travel route between destinations.

In the starting point-destination automatic display mode, when the cumulative traveling distance exceeds L ₀ + L ₁ , as shown in FIG. 10, the cumulative traveling distance from the starting point is (L ₀ + L 1).
Position data number m ₃ that is ₁ ) / 2 away, and position data number m that is (L ₀ + L ₁ ) / 2 away from the destination toward the starting point
_{4 is} also obtained, and map scrolling is performed at a low speed in the range of 1 ≦ m ≦ m ₁ and m ₂ <m ≦ m _L , and m ₁ <m ≦ m ₃ and m
_In the range of ₄ <m ≤ m ₂ , the map is scrolled at medium speed,
In the range of m ₃ <m ≦ m ₄ , map scrolling may be performed at high speed.

13 and 14 are flowcharts showing a modified example of the first embodiment, FIG. 15 is an operation explanatory diagram of the modified example, and FIG. 16 is an explanatory diagram of a screen display example. In this modification, the map image drawing unit 15 uses the map data of the reduced scale A every time τ ₁ elapses during m ≦ m ₁ in the second mode of the departure point-destination automatic display mode, in particular, the designated channel. Of the traveling locus data, the map image centered on the position indicated by each a-th position data is drawn together with the traveling locus and the mark, and displayed on the screen (see steps 601 to 609 in FIG. 13 and FIG. 16 (1)). ), M ₁ <m ≦ m ₂ , using map data of a scale 1 / c times smaller than the scale specified by the user (c> 1),
Every time τ ₁ elapses, a map image centering on the position indicated by each (ca) position data among the traveling locus data of the designated channel is drawn together with the traveling locus and the mark and displayed on the screen (see FIG. 14). Steps 701 to 707, FIG.
(2)), m ₂ <m, every time τ ₁ elapses using the map data of the scale specified by the original user, of the traveling locus data of the specified channel, every a position data of A map image centered at the indicated position is drawn together with the traveling locus and marks and displayed on the screen (steps 708 to 71).
3).

As a result, the middle point between the starting point and the destination is reduced in scale.
It is reduced by a small map image and displayed on the screen along with the running trajectory
Can be displayed, and the user can
You can determine the optimal route from the surrounding road,
Specify the user in advance about the place of departure and the place of destination
A magnified map image of the
The location of the land and the small roads that connect these to nearby highways
Can be accurately grasped (see FIGS. 15 and 16).
See). In step 706 of FIG. 14, m ← m + dca
(However, d is a fixed integer value greater than 1)
The map scroll speed of the displayed map image is increased by d times.
You can do it. Also, the cumulative mileage is L₀+ L₁Over
If it is, as shown in Fig. 15, cumulative running from the point of departure
At distance (L₀+ L₁) / 2 Position data number
m₃, From the destination to the departure point (L₀+ L₁) / 2 away
Position data number m_FourAlso, 1 ≦ m ≦ m₁When
m₂<M ≦ m_LDraw a detailed map image at scale A
Then m ₁<M ≦ m₃And m_Four<M ≦ m₂Range is 1 / A
Draw a wide range of map images at a scale that is c times smaller, and₃<M
≤m_FourThe range of is 1 / c 'times smaller than A (c' is c
Larger value) to draw a wider map image
You may.

FIG. 17 is a flow chart showing another modification of the first embodiment.
It is a figure. In this modification, the starting point-destination automatic display
In the second mode of the modes, m <m₁During the map image
The drawing unit 15 uses the map data of the scale previously specified by the user.
Using τ₁Each time, the running track data of the specified channel is
Of the data, the position indicated by each a position data is the center.
Drawing a map image with a running trajectory and marks, screen chart
Shown (steps 801 to 810 in FIG. 17), step 8
In 09, m is m₁The first time you cross m = m₂Toshi (Su
Step 811), and thereafter, the map data of the scale specified by the user.
Τ ₁Runs on specified channel every time
Of the locus data, the position indicated by each a position data is
Draw a central map image along with a running track and marks,
It is displayed (steps 804 to 810). With this,
Omitting the display of map images between the origin and destination
The user can only confirm the location of the origin and destination.
It can be done quickly if you want.

Next, a second embodiment of the present invention will be described. The second embodiment is a vehicle-mounted navigation device having the same configuration as that shown in FIG. 1, in which the map image drawing unit 1 of the navigation controller 10 in the departure-destination automatic display mode is used.
The operation of No. 5 is different from that of the first embodiment. 18 and 19 are the second
20 is a flow chart showing the operation of the navigation controller 10 according to the embodiment, FIG. 20 is an explanatory view of the starting point-destination automatic display operation in the second embodiment, and FIG. 21 is an explanatory view of a screen display example.

The user wants to confirm the whereabouts of the departure place or the destination and determine the optimum travel route by looking at the map from a certain departure place to a certain destination where the traveling locus is recorded in the past. At this time, the menu call key is pressed to display the menu screen, the cursor is moved to the third column, and the execute key is pressed. Then, the character drawing unit 17 draws the traveling locus list image in the video RAM 16 using the recording start date / time data and the recording end date / time data stored in the channel 1 to 5 areas of the traveling locus memory 12, and the cursor mark is displayed. Is drawn in the first column, and the traveling locus list is displayed on the screen as shown in FIG. If the starting point and the destination desired by the user are those on the traveling locus of channel 1, or if the user cannot find out which channel the traveling locus of channel 1 is on and the user wants to find out the starting point and destination on the traveling locus of channel 1, Press the Enter key to instruct automatic display of the departure point-destination specifying channel 1.

Then, the navigation controller 10
Becomes the starting point / destination automatic display mode. First, the distance calculating unit 14 calculates the distance L between the starting point and the destination of the traveling locus of channel 1, and checks whether the L is a certain distance L ₀ or more ( 18 (steps 901 and 902 in FIG. 18), if L ₀ or less, the map image drawing unit 15 is instructed to rewrite the map image in the first mode (step 903), and if L ₀ or more, L ₂ = L ₀ / a _{2, L 3 = L- (L} 0/2), with these L _2, L ₃ instructs the rewriting of the map image in the second mode to the map image drawing unit 15 (step 904). As shown in FIG. 20, a position L ₂ away from the starting point toward the destination is indicated by P ₁ , and a position L ₃ away is indicated by P ₂ .

When the first mode is instructed, the map image drawing unit 15 first sets X indicating the distance from the departure place to the center of the map image to 0 (step 905), and the travel locus memory 1
The data of the departure point of the designated channel = 1 channel is read from 2 and the map data of the scale A including the departure point is read from the CD-ROM 1 and the video R is read using the map data.
A map image centering on the departure place is drawn on the AM 16 (step 906), and a straight line connecting the departure place and the destination is superimposed on the map image and drawn by a broken line. Then, when the starting point or the destination is included in the map image, these marks are drawn (the starting point mark is drawn at first). The image in the video RAM 16 is read by the video conversion unit 18,
It is converted into a video signal, output to the CRT display device 4, and displayed on the screen (steps 907 to 908, see FIG. 21 (1)). As a result, the map image around the departure place of channel 1 is displayed on the screen together with the departure point mark and the straight line indicating the direction of the destination. You can decide whether to do it.

After that, the map image drawing unit 15 checks whether X matches the distance L between the starting point and the destination (step 909), and since it is not yet, X ← X + 0.3 e (unit is km.
Note that e is a fixed integer value of 1 or more. When X exceeds L, X ← L. ) And calculate the coordinates of the position P which is X away from the starting point toward the destination (step 91).
0, 911), after a certain short time τ _{1 has} passed, video RAM
A map image centered on P is drawn in 16 and a straight line connecting the starting point and the destination is drawn on the map image with a broken line. Further, when the starting point or the destination is included in the map image, these marks are drawn at the corresponding places and displayed on the screen (steps 912, 913, 907, 90).
8). As a result, the map image on the screen, the straight line connecting the starting point and the destination, and the starting point mark are integrally scrolled in the direction opposite to the direction of the destination seen on the map image.

Similarly, every time a fixed time elapses, 0.3 e (k) from the center of the current map image toward the destination.
m) so that the screen image is centered at a position away from
The line connecting the starting point and the destination and the mark are rewritten (see FIG. 21 (2)). When a destination is entered on the map image, a destination mark is drawn at a place corresponding to the destination. When X matches L in step 909, the navigation controller 10 returns to the normal navigation mode after a lapse of a certain time (step 914).

In this way, in the first mode of the automatic display mode of the departure place / destination, the map image containing a part of the straight line connecting the departure place and the destination of the channel designated by the user Is drawn and displayed along with a straight line connecting the starting point and the destination, the starting point mark, and the destination mark, while rewriting so that a part of the changes continuously from the starting point side to the destination side. This allows the map to automatically scroll at a constant speed when the user is far from the starting point to the destination, without the user pressing the up, down, left, or right key to perform the map scroll operation. , A straight line connecting the starting point and the destination and the point between the starting point and the destination can be displayed on the screen along with the surrounding roads over the entire length of the straight line connecting the starting point and the destination that was previously driven. , You can confirm the whereabouts of the destination and determine the route. If e is set to 1 in step 910, the map image can be continuously scrolled, and if e is set to 2 or more, for example, 5, the map image can be automatically scrolled discontinuously and quickly.

Unlike this, the map image drawing unit 15 is
When the mode is designated, X = 0 is set (step 9
15) First, the starting point data of the designated channel 1 is read from the running track memory 12, the map data of the scale A including the starting point is read from the CD-ROM 1, and the starting point is stored in the video RAM 16 using the map data. A map image centered at is drawn, and a straight line connecting the departure place and the destination is drawn with a broken line. Then, if the starting point and the destination are included in the map image, these marks are drawn (the starting point mark is drawn at first). The image in the video RAM 16 is read by the video conversion unit 18, converted into a video signal, output to the CRT display device 4, and displayed on the screen (steps 1001 to 1003 in FIG. 19, see FIG. 21 (1)).

After that, the map image drawing unit 15 checks whether X matches the distance L between the starting point and the destination (step 1004), and since it is not yet, X ← X + 0.3 e (where X exceeds L). Then X ← L.), And calculate the coordinates of the position P that is X away from the starting point toward the destination (step
1005, 1006). Then, it is checked whether X exceeds L ₂ (step 1007), and if NO, a constant short time τ ₁
After the passage, a map image centered on P is drawn in the video RAM 16, and a straight line connecting the starting point and the destination is superimposed on the map image and drawn by a broken line. Further, when the starting point or the destination is included in the map image, these marks are drawn at the corresponding places and displayed on the screen (steps 1008, 1009,
1002, 1003). As a result, the map image on the screen, the straight line connecting the starting point and the destination, and the starting point mark are integrally scrolled in the direction opposite to the direction of the destination seen on the map image.

After that, the map image drawing unit 15 displays X ← X +
And 0.3 e, after calculating the coordinates of the position P at a distance X to the destination direction from the start point, X is checked exceeds the L _2, if NO, the after a predetermined time tau ₁ has elapsed, the video R
In AM16, draw a map image centered on a position away from the starting point in the direction of the destination by X, and draw a straight line connecting the starting point and the destination with a broken line, and further draw the starting point or the destination in the map image. If is included, draw these marks at the corresponding places. As a result, the map image on the screen, the straight line connecting the starting point and the destination, and the starting point mark are scrolled together (steps 1005 to 1009, 1002, 1003). In the same manner, every time a certain time elapses, the map image, the straight line connecting the departure point and the destination, with the position 0.3 e (km) away from the center of the current map image toward the destination, becomes the center.
Rewrite the mark and scroll the map slowly.
Thus, the location of the departure place and the road around the departure place can be correctly grasped.

Thereafter, as a result of updating X in step 1005, when X exceeds L ₂ , after elapse of τ ₂ (<τ ₁ ), 0.3 e (km) away from the center of the current map image toward the destination. Draw a map image centered on the specified position in the video RAM 16, and draw a straight line connecting the starting point and the destination with a broken line,
Further, if the map image includes a starting point or a destination, these marks are drawn at the corresponding places and displayed on the screen (steps 1006, 1007, 1010, 1011, 1009, 1002,
1003). Similarly, every time a certain period of time elapses, the map image, the straight line connecting the departure point and the destination, and the mark are rewritten so that the position near the destination is 0.3 e (km) from the current screen center. , Scroll the map at high speed.
As a result, the road intermediate between the departure place and the destination can be grasped in a short time.

After that, when the result of updating X in step 1005 is that L ₃ <X, after τ ₁ , the center of the current map image is located at a position 0.3 e (km) away from the center of the map toward the destination. Draw a map image to the video RAM16, and
A straight line connecting the starting point and the destination is drawn with a broken line, and when the starting point or the destination is included in the map image, these marks are drawn at the corresponding places and displayed on the screen (steps 1006, 1007, 1010, 1008, 1009, 1002, 1003). Similarly, every time a certain period of time elapses, the map image, the straight line connecting the departure point and the destination, and the mark are rewritten so that the position near the destination is 0.3 e (km) from the current screen center. , Scroll the map at the original slow speed. Thereby, the surrounding roads near the destination can be surely grasped. Finally, when the map image, the straight line connecting the starting point and the destination, and the destination mark are rewritten so that the destination is in the center of the screen, the navigation controller 10 returns to the normal navigation mode after a certain time has elapsed (step 1004). , 1012).

In this way, in the second mode of the automatic display mode of the departure place / destination, the map image containing a part of the straight line connecting the departure place and the destination of the channel designated by the user Since the straight line inside is rewritten so as to move from the starting point side to the destination side, and the map image is rewritten at high speed between the starting point and the destination, it is far from the starting point and the destination. Even in this case, the map scroll can be completed in a short time (see FIG. 20). When L ₂ <X ≤ L ₃ , the map image is rewritten at intervals of τ ₁ , but X ← X + fe between steps 1010 and 1011.
By setting (f is a value greater than 0.3), map scrolling may be performed at high speed.

If the starting point and the destination of channel 1 are different from what the user is trying to check this time,
After returning to the normal navigation mode, set the departure point / destination automatic display mode again, and by specifying channels 2 and later in order, you can easily and quickly find out where the departure point and destination of each channel are, and then select It is possible to determine the travel route connecting the departure place and the destination. In addition, when the accumulated traveling distance exceeds L ₀ + L ₁ in the departure place-destination automatic display mode, as shown in FIG. 20, the position is (L ₀ + L ₁ ) / 2 away from the departure place toward the destination. A position P ₄ distant from P ₃ , L- (L ₀ + L ₁ ) / 2 is also obtained, and a map scroll is performed at a low speed between the departure place-P ₁ and the P ₂ -destination, and P ₁ -P ₃ during between a P ₄ -P ₂ performs a map scrolling at medium speed, P ₃ -P ₄ between may be performed a map scroll speed.

22 and 23 are flow charts showing a modified example of the second embodiment, FIG. 24 is an explanatory view of the starting point-destination automatic display operation of the modified example of the second embodiment, and FIG. 25 is a screen display example. FIG. In this modified example, in the second mode of the automatic display mode of the starting point / destination, the map image drawing unit 15 uses the map data of the scale previously specified by the user every time τ ₁ while X ≦ L _2. , 0.3 e from the origin to the destination
A map image centered at each position (km) apart is drawn and displayed together with a straight line connecting the starting point and the destination and a mark (see steps 1101 to 1112 in FIG. 22 and FIG. 25 (1)), and L ₂
While <X ≦ L ₃ , using map data of a scale (c> 1) that is 1 / c times smaller than the scale specified by the user, each time τ ₁ elapses, 0.3 ce (km) is separated toward the destination. The map image centered on the specified position is drawn and displayed along with the straight line connecting the starting point and the destination and the mark (steps 1201 to 120 in FIG. 23).
7, FIG. 25 (2)), and L ₃ <X, each time τ ₁ elapses using the map data of the scale specified by the original user,
A map image whose center is at a distance of 0.3 e (km) toward the destination is drawn and displayed along with a straight line connecting the starting point and the destination and a mark (steps 1208 to 1214).

As a result, the midpoint between the starting point and the destination can be reduced by a small-scale map image to be displayed on the screen together with the traveling locus, and the user can see a wide range of roads around the straight line connecting the starting point and the destination. The optimal route can be determined from the map, and the enlarged map image specified by the user in advance is displayed near the departure point and the destination. It is possible to accurately understand the small roads that connect the main roads (Fig. 2
4, FIG. 25). In addition, in step 1205 of FIG. 23, X ←
The map scroll speed of the reduced map image may be increased to d times as X + 0.3 dce (where d is an integer value larger than 1).

The distance between the starting point and the destination is L ₀ + L ₁
24, the positions P ₃ , L- (L are located at a distance (L ₀ + L ₁ ) / 2 from the starting point toward the destination, as shown in FIG.
₀ + L ₁ ) / 2 The position P ₄ apart is also obtained, and the departure point −
Draw a detailed map image at a scale A between P ₁ and P ₂ -destination, and draw a wide range map image at a scale of / c times A between P ₁ -P ₃ and P ₄ -P _2. and, P ₃ -P ₄ between may be drawn more extensive map image according to the scale of 1 / c'times (c'> c) of the a.

FIG. 26 is a flow chart showing another modification of the second embodiment. In this modified example, in the second mode of the automatic display mode of the starting point / destination, the map image drawing unit 15 uses the map data of the scale previously specified by the user every time τ ₁ while X ≦ L _2. , From the departure point of the designated channel
A map image centered at a position separated by 0.3 e (km) is drawn and displayed along with a straight line connecting the starting point and the destination, and a mark (NO in steps 1301 to 1309 and 1310 of FIG. 26, 1312 to 1312).
14, 1306, 1307, when X exceeds L ₂ for the first time in step 1310, X = L ₃ is set (step 1311), and thereafter, every time τ ₁ elapses using the map data of the scale specified by the user, 0.3 A map image centered on the position near the destination by e (km) is drawn and displayed together with a straight line connecting the starting point and the destination and a mark (steps 1312 to 1314, 1306 to 1310). Thereby, the display of the map image can be omitted in the middle of the departure place and the destination, and when the user only wants to confirm the whereabouts of the departure place and the destination, it can be quickly performed.

In the second embodiment shown in FIGS. 18 to 21 and the modifications of FIGS. 22 to 25, the starting point and the destination for automatic display may be, for example, two points arbitrarily designated by the user. .

[0061]

As described above, according to the present invention, when the user gives an instruction to automatically display a certain traveling locus, the traveling locus data instructed by the user stored in the traveling locus data storage means and stored in the map information storage means. With reference to the map information, a map image containing a part of the traveling locus is set so that the traveling locus included in the map image changes continuously or discontinuously from one end side to the other end side of the traveling locus. By rewriting to, and drawing and displaying along with the running trajectory,
When the user is far away from the departure point, which is one end of the travel path, to the destination, which is the other end of the travel path,
Even if you do not press the left and right keys to scroll the map, you can continue to the starting and
The traveling route between the departure point and the destination can be automatically displayed on the screen together with the surrounding roads, and the location confirmation and the route determination can be performed quickly and easily. Also, even if you do not know which of the multiple travel paths you want to travel this time, you can quickly find the desired travel path, confirm the whereabouts and determine the route, simply by instructing the automatic display for each travel path. it can.

According to another aspect of the invention, the map image drawing means slows down the map moving speed by rewriting the map image when drawing the map image containing the traveling loci near the departure place and the destination. , When drawing a map image that contains a trajectory other than near the starting point and near the destination, it is configured to speed up the map movement by rewriting the map image, so that the distance between the starting point and the destination is extremely long. When they are far apart, the automatic scrolling of the map can be completed in a short time, and the departure place and the destination can be accurately confirmed on the slowly moving map image.

According to still another aspect of the invention, the map image drawing means enlarges the scale when drawing the map image including the traveling loci near the departure point and the destination, and sets the map image close to the departure point. When drawing a map image that contains a traveling locus other than near the ground, by configuring so as to reduce the scale, when the departure point-destination is extremely far away,
It is possible to find the optimum driving route connecting the departure point and the destination from a wide area. Then, it is possible to confirm the exact place of departure and destination on the detailed map image.

According to another aspect of the invention, the map image drawing means draws only the map image containing the traveling loci near the departure place and the destination, so that the desired departure place and the desired destination can be obtained. You can quickly check the location of the place on the map.

According to another aspect of the invention, the map information storage means for storing the map information, the vehicle position detection means for detecting the vehicle position, the display means for displaying the map image, and the map information storage means are stored. In a vehicle-mounted navigation device equipped with a map image drawing means for drawing a map image using the map information and displaying it on a display means, an operation means for instructing automatic display between two points desired by the user is provided, and the map The image drawing means uses the map information stored in the map information storage means when the automatic display between the two points desired by the user is instructed by the operation means, and includes a part of the straight line connecting the two points. The image is redrawn so that the straight line connecting the two points in the map image changes continuously or discontinuously from one end side to the other end side of the two points, and is displayed together with the marks of the two points and displayed. By configuring to display in a row, when the user tries to travel from a certain point to another certain point, the user does not have to perform the map scroll operation by pressing the up, down, left or right key. However, it can be automatically displayed on the screen along the length of the straight line connecting the two points, along with the road near the straight line connecting the two points.
The location and route can be confirmed quickly and easily.

According to another aspect of the invention, the map image drawing means slows down the map moving speed by rewriting the map image when drawing the map image including the vicinity of two points, and the map image not including the vicinity of two points. When the map is drawn, the map movement speed by rewriting the map image is configured to be fast, so that the automatic scrolling of the map can be completed in a short time when the two points are extremely distant from each other. ,
For two points, it is possible to confirm the exact location on the map image that moves slowly.

According to another aspect of the invention, the map image drawing means enlarges the scale of the map image when drawing the map image including two points or near two points, and draws the map image away from the two points. In doing so, the scale of the map image is configured to be small, so that when the two points are extremely distant from each other, it is possible to find an optimum traveling route connecting the two points from a wide area. Then, it is possible to confirm the exact locations of the two points on the detailed map image.

According to another invention, the map image drawing means enlarges the scale of the map image when drawing the first and last map images, and when drawing the map images other than the first and last map images. By configuring the scale of the image to be small, it is possible to find the optimum driving route connecting the two points from a wide area when the two points are very far apart, and to make the map in a short time. Automatic scrolling can be completed. Then, it is possible to confirm the exact locations of the two points on the detailed map image.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a vehicle-mounted navigation device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of data stored in a travel locus memory.

FIG. 3 is a first flowchart showing the operation of the navigation controller according to the first embodiment.

FIG. 4 is a second flowchart showing the operation of the navigation controller according to the first embodiment.

FIG. 5 is a third flowchart showing the operation of the navigation controller according to the first embodiment.

FIG. 6 is a fourth flowchart showing the operation of the navigation controller according to the first embodiment.

FIG. 7 is a fifth flowchart showing the operation of the navigation controller according to the first embodiment.

FIG. 8 is a sixth flowchart showing the operation of the navigation controller according to the first embodiment.

FIG. 9 is an explanatory diagram of data stored in a travel locus memory.

FIG. 10 is an explanatory diagram of a starting point-destination automatic display operation according to the first embodiment.

FIG. 11 is an explanatory diagram of a screen display example of the first embodiment.

FIG. 12 is an explanatory diagram of a screen display example of the first embodiment.

FIG. 13 is a first flowchart showing the operation of the navigation controller according to the modification of the first embodiment.

FIG. 14 is a second flowchart showing the operation of the navigation controller according to the modification of the first embodiment.

FIG. 15 is an explanatory diagram of a starting point-destination automatic display operation according to a modified example of the first embodiment.

FIG. 16 is an explanatory diagram of a screen display example of a modified example of the first embodiment.

FIG. 17 is a flowchart showing the operation of the navigation controller according to another modification of the first embodiment.

FIG. 18 is a first flowchart showing the operation of the navigation controller according to the second embodiment of the present invention.

FIG. 19 is a second flowchart showing the operation of the navigation controller according to the second embodiment of the present invention.

FIG. 20 is an explanatory diagram of a departure place-destination automatic display operation according to the second embodiment.

FIG. 21 is an explanatory diagram of a screen display example of the second embodiment.

FIG. 22 is a first flowchart showing the operation of the navigation controller according to the modification of the second embodiment.

FIG. 23 is a second flowchart showing the operation of the navigation controller according to the modification of the second embodiment.

FIG. 24 is an explanatory diagram of a start point-destination automatic display operation according to a modified example of the second embodiment.

FIG. 25 is an explanatory diagram of a screen display example of a modified example of the second embodiment.

FIG. 26 is a flowchart showing the operation of the navigation controller according to another modification of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CD-ROM 2 Operation panel 3 GPS receiver 4 CRT display device 10 Navigation controller 12 Running track memory 13 Running track point recording section 14 Distance calculating section 15 Map image drawing section 16 Video RAM 17 Character drawing section 18 Video conversion section

Claims (8)

[Claims] 1. A map using map information storage means for storing map information, vehicle position detection means for detecting a vehicle position, display means for displaying a map image, and map information stored in the map information storage means. A map image drawing means for drawing an image and displaying it on the display means, a running locus data storage means for storing a plurality of running locus data, and an instruction for recording a running locus from a certain starting point to a certain destination. Then, in the vehicle-mounted navigation device equipped with the traveling locus registration means for registering the vehicle position data string between the departure place and the destination as traveling locus data in the traveling locus data storage means, an instruction to automatically display the traveling locus desired by the user is given. An operating unit is provided, and the map image drawing unit stores the user-desired data stored in the traveling locus data storage unit when an automatic display of the traveling locus desired by the user is instructed by the operating unit. By using the traveling locus data and the map information stored in the map information storage means, a map image including a part of the traveling locus is displayed, and the traveling locus included in the map image is from one end side to the other end side of the traveling locus. The in-vehicle navigation device is characterized in that it is drawn along with the traveling locus while being rewritten so as to change continuously or discontinuously and is displayed on the display means. 2. The map image drawing means draws a map image containing a traveling locus near the departure point and near the destination,
By slowing down the map movement speed by rewriting the map image, when drawing a map image that contains a traveling locus other than near the departure place and the destination, the map movement speed is made faster by rewriting the map image, The vehicle-mounted navigation device according to claim 1. 3. The map image drawing means draws a map image containing a traveling locus near the starting point and near the destination.
The vehicle-mounted navigation according to claim 1 or 2, characterized in that the scale is enlarged and the scale is reduced when drawing a map image including a traveling locus other than near the starting point and the destination. apparatus. 4. The vehicle-mounted navigation device according to claim 1, wherein the map image drawing means draws only a map image including a traveling locus near the departure place and near the destination. 5. A map using map information storage means for storing map information, vehicle position detection means for detecting a vehicle position, display means for displaying a map image, and map information stored in the map information storage means. An in-vehicle navigation device having a map image drawing means for drawing an image and displaying it on a display means is provided with an operating means for instructing automatic display between two points desired by a user, and the map image drawing means is an operating means. When an automatic display between two points desired by the user is instructed, a map image containing a part of a straight line connecting the two points is displayed on the map image using the map information stored in the map information storage means. While rewriting so that the straight line connecting the two points changes continuously or stepwise from one end side to the other end side of the two points, draw it together with the marks of the two points and display it on the display means. It, vehicle navigation apparatus according to claim. 6. The map image drawing means slows a map moving speed by rewriting the map image when drawing a map image including near two points, and draws a map image when drawing a map image not including near two points. The vehicle-mounted navigation device according to claim 5, wherein the map movement speed is rewritten by rewriting the above. 7. The map image drawing means enlarges the scale of the map image when drawing a map image including two points or near two points, and reduces the scale of the map image when drawing a map image away from two points. The vehicle-mounted navigation device according to claim 5 or 6, characterized in that: 8. The map image drawing means increases the scale of the map image when drawing the first and last map images, and reduces the scale of the map image when drawing the map images other than the first and last map images. The vehicle-mounted navigation device according to claim 5, wherein: