JP2000266555A - Guide path display method of navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a driver to easily grasp the image of a guide path to be driven. SOLUTION: In the guide path display method, after the search of a guide path GRT, an intersection for turning right/left that becomes an important point on the guide path GRT is searched for, and maps MP1-3 around the intersection for turning right/left that has been searched for are displayed page by page in the order of advance in a specific scale along with a landmark RM. When all intersections for turning right/left on the guide path GRT are displayed, a map MP4 around a destination is finally displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation route display method of a navigation device, and more particularly to a navigation route display method of a navigation device for searching for a guidance route to a destination and displaying a key point of the searched guidance route.

[0002]

2. Description of the Related Art A navigation device that guides a vehicle so that a driver can easily arrive at a desired destination detects a position of the vehicle and stores the position of the vehicle around a vehicle position from a storage medium such as a CD-ROM. The map data is read out, the map image is displayed on the display screen, and the vehicle position mark (own vehicle mark) is superimposed and displayed at a predetermined position on the map image. Then, as the current position changes due to the movement of the vehicle, the own vehicle mark on the screen is moved, or the own vehicle mark is fixed at a predetermined position such as the center of the screen, and the map is scrolled, so that the vehicle always moves around the vehicle position. Map information can be understood at a glance.

In such a navigation device, when a destination is input, a navigation route is searched from the departure point to the destination,
There is a route guidance function that displays a guidance route on the screen and guides the driver to travel. The driver will drive along the searched guidance route, but grasping the searched guidance route before traveling is very important because it can prepare the driver and leads to safe driving. is there. In order to support this, the navigation device displays the searched guidance route as a whole at an optimal scale and also displays the distance of the guidance route from the departure point to the destination, as shown in FIG. As shown in FIG. 7 (b), there is a "display all routes" function and a "route information" function for displaying a list of road names and section distances of the guide route traveling from the departure place. Each of these functions is for the driver to get an image of the guide route to be traveled.

[0004]

However, in the "all route display" function for displaying the entire guidance route from the departure point to the destination, if the distance of the guidance route is long, the map displayed on the screen becomes large, Since the map information around the guidance route is also scarce, the driver can hardly imagine the guidance route actually traveling after all.
In addition, in the "route information" function for displaying a list of road names and section distances of the guidance route, it is difficult to imagine the guidance route because the information is provided by characters, and even if the displayed road name is a main road such as a national road, If the road is unknown to the driver, the information becomes meaningless. Accordingly, an object of the present invention is to provide a navigation route display method of a navigation device that allows a driver to easily grasp an image of a traveling guidance route.

[0005]

According to the present invention, the above object is achieved by searching for an intersection where a right or left turn is made on a guidance route and displaying a map around the intersection on a predetermined scale in the order of progress. . Further, according to the present invention, according to the present invention, in a memory for storing a guidance route, whether the vehicle is going straight or turning left or right at an intersection forming the guidance route is stored, and the stored information is used to search for an intersection that turns right or left. Achieved by:
Further, according to the present invention, the above object is achieved by dividing a display screen and displaying a predetermined number of maps around an intersection where a right or left turn on a guidance route is performed on one screen. That is, the driver can easily imagine the guided route to be driven by displaying the map around the intersection of right and left turns, which is an important point on the guided route, in the order of travel.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (a) Outline of the Present Invention FIG. 1 is a diagram for explaining an outline of a first guidance route display method (one slide display) of the present invention. MP1 to MP4 are displayed on a display screen. Map around the intersection that turns right and left
CM is a vehicle position mark, GRT is a guide route, PG is a page / total page number display, RM is a facility mark (landmark) within a predetermined distance from the intersection, and PP is a destination mark. Also, in the traveling guidance route GRT,
FIG. 1A shows a map MP1 around the first turning intersection (first right-turn intersection), and FIG. 1B shows a map MP2 around the first turning intersection and the second turning intersection (second left-turn intersection). FIG. 1 (c) is a map MP3 of the vicinity of the next turning intersection after passing the second left intersection (third right intersection), FIG.
(D) is a map MP4 around the destination. After the navigation device has searched the guidance route GRT, the driver
When the "1 slide display" function of the RT is selected, a right / left turn intersection on the guidance route GRT is searched, and the maps MP1 to 3 around the searched right / left turn intersection are displayed one by one in the traveling order at a predetermined scale together with the landmark RM. I do. When all the right and left turn intersections on the guidance route GRT are displayed, finally, a map MP4 around the destination is displayed. The page turning is performed automatically or by a remote control operation by the driver. In this way, by displaying one map at a time around the right / left turn intersection, which is an important point in the guidance route, the driver can easily grasp the image of the guidance route to be traveled.

FIG. 2 is a diagram for explaining an outline of a second guidance route display method (display of a plurality of slides) according to the present invention.
Is a display screen that displays a predetermined number of maps around the intersection of right and left turns on the guidance route in order of progress, SMP is a map around the intersection of interest indicating that it is selected by blinking frame display, etc., and DT is the vicinity of the intersection of interest from the vehicle position. It is a distance display to the intersection of the map SMP. When the driver selects the "multiple slide display" function of the guidance route after searching for the guidance route, the navigation device searches for a right / left turn intersection on the guidance route and, as shown in FIG. A predetermined number of maps around the intersection are displayed on the display screen DP. If not all the intersections are displayed on the display screen DP, as shown in FIG. 2B, a map image around the intersection on the next page is created and displayed. The switching of the display screen DP and the selection of the target intersection surrounding map SMP are performed by the driver's remote control operation (page turning key operation, joystick key operation). In this manner, a predetermined number of right and left turn intersection surrounding maps that are important points on the searched guidance route and the distance from the vehicle position to the target right and left turn intersection can be confirmed on one screen. It is possible to easily grasp the image of the guide route to be traveled.

(B) Configuration of Navigation Apparatus FIG. 3 is an overall configuration diagram of the navigation apparatus, 1 is a navigation controller, 2 is a remote controller for inputting various commands to the navigation controller, 3 is a map,
A display device for displaying a guidance route, various menus, etc., 4 is a CD-ROM, DVD-R for storing map information.
OM or other storage media, 5 is a GPS receiver that receives radio waves from satellites and measures the current position and direction of the vehicle, 6 is a sensor for self-contained navigation, 7 is a guidance voice that notifies that the vehicle has reached the destination, An audio unit that outputs guidance voice at an intersection. The GPS receiver 5 performs three-dimensional positioning or two-dimensional positioning processing to calculate the vehicle position and azimuth, and outputs these together with the positioning time. The self-contained navigation sensor 6 includes a relative azimuth sensor (angle sensor) such as a vibrating gyroscope that detects a vehicle rotation angle, and a distance sensor that generates one pulse for each predetermined traveling distance, although not shown. The map information stored in the storage medium 4 includes (1) a road layer, (2) a background layer for displaying objects on a map, and (3)
A character layer for displaying characters such as city names, and (4)
It is composed of an IIS layer for storing IIS (Integrated Information Service) information.

In the navigation control device 1, 11
Is a map reading control unit, which calculates a cursor position (coordinate and latitude position at the center of the screen) when a map moving operation or a map selecting operation is performed, and determines a predetermined position from the storage medium 4 based on the own vehicle position or the cursor position. Is read and input to the map buffer. A map buffer 12 stores the map information read from the storage medium 4. A plurality of map information (a plurality of units) around the own vehicle position or around the cursor position, for example, 3 × 3 units of map information are read into the map buffer 12 so that the map can be scrolled. Reference numeral 13 denotes a map drawing unit, and a map buffer 1
A map image is generated using the map information stored in the storage unit 2.
Reference numeral 14 denotes a VRAM for storing a map image, and reference numeral 15 denotes a reading control unit for changing the position of one screen cut out from the VRAM 14 based on the center position of the screen and scrolling the map in accordance with the movement of the vehicle position or the movement of the cursor.

Reference numeral 16 denotes a voice guidance unit for outputting a guidance voice for notifying that the vehicle has arrived at the destination or a guidance voice at an intersection from the audio unit 7, and 17 receives a signal corresponding to an operation of a remote controller and instructs each unit. Remote control unit, GP is 18
A vehicle position calculating unit for calculating the vehicle position based on the S data and the self-contained navigation sensor output; 19, a guidance route control unit;
Is a guidance route memory for storing guidance routes, and 21 is a guidance route drawing unit. The guidance route control unit 19 performs a calculation process of a guidance route from the departure place to the destination. The guidance route memory 20 stores all node data on the guidance route calculated by the guidance route control unit 19 from the departure place to the destination.
The guidance route drawing unit 21 reads the guidance route information (node sequence) from the guidance route memory 20 and draws the guidance route on the map so as to be identifiable. 22 is a slide display generation unit,
The node of the right / left intersection is searched from all the node data on the guidance route stored in the guidance route memory 20, and the map reading control unit 11 is instructed to map the map information around the predetermined right / left intersection from the storage medium 4 into a map. The buffer 12 reads the information and generates a guidance route together with a map image around a predetermined right / left turn intersection based on the map information. An operation screen generating unit 23 generates various menu screens (operation screens).
Reference numeral 4 denotes various mark generating units for outputting various marks such as a vehicle position mark and a cursor, and 25 denotes an image synthesizing unit.

FIG. 4 is a view for explaining guidance route data stored in the guidance route memory. The guidance route memory 20 stores all nodes constituting the guidance route calculated by the guidance route control unit 19, the latitude and longitude of the node, and the right / left intersection flag (“0”) indicating whether or not the node is a right / left intersection. ("Is an intersection that goes straight ahead, and" 1 "is an intersection that turns right and left). Slide display generator 22
Confirms the contents of the right / left turn intersection flag and obtains node information in which the right / left turn intersection flag is “1”.

(C) Guide route display processing of the present invention FIG. 5 shows a first guide route display (one slide display) of the present invention.
In this case, as shown in FIG. 1, a map of the vicinity of a right / left turn intersection is drawn on a single screen by a driver's remote control operation as shown in FIG. The slide display generation unit 22
After searching for the guidance route from the departure place to the destination, it is monitored whether or not the driver has selected the "slide display" function of the guidance route (step 101). If it is not selected, the process returns to step 101 and waits.
i (step 102, i = 1), guidance route memory 2
With reference to the right / left intersection flag of the guidance route data stored in 0, the node whose flag content is “1” first starting from the right / left intersection flag of the departure node is set as the first right / left intersection. Next, the slide display generation unit 22 instructs the map reading control unit 11 to read a map around the first right / left turn intersection. As a result, the map readout control unit 11 reads out the map information around the first right / left turn intersection from the storage medium 4 and stores it in the map buffer 12 (step 103).
The slide display generator 22 generates a map image around the first right / left turn intersection using the map information read into the map buffer 12, and displays the map image on the display device 3 together with the guidance route (step 104, FIG. 1A )reference). Here, the slide display generation unit 22 checks whether or not the next page feed operation is performed by the driver (step 105), and if so, sets i + 1 → i (step 106, i = 2), and proceeds to step 103. Next, the node whose flag content is “1” is set as the ith right / left intersection, and the subsequent processing is repeated. On the other hand, if the next page feed operation is not performed in step 105, the slide display generation unit 22 checks whether or not the driver has performed an operation to end the “slide display” function (step 107). If the ending operation has not been performed, the process returns to step 104 to continue displaying the map around the right / left-turn intersection while the display is in progress.
End the function.

FIG. 6 is a processing flow of the first guidance route display (one slide display) according to the present invention, in which a map around a right-left intersection is automatically drawn one by one on one screen. The slide display generator 22 searches for a guidance route from the departure point to the destination, and then performs “slide display” of the guidance route by the driver.
It is monitored whether or not the function is selected (step 20)
1). If it is not selected, the process returns to step 201 and waits. If the “slide display” function of the guidance route is selected, the slide display generator 22 changes 1 → i (step 202,
i = 1), referring to the right / left turn intersection flag of the guide route data stored in the guide route memory 20, starting from the right / left turn intersection flag of the departure point node, the flag content is "1" first.
Is a first right-left intersection. Next, the slide display generation unit 22 instructs the map reading control unit 11 to read a map around the first right / left intersection. This allows
The map reading control unit 11 reads out the map information around the first right / left turn intersection from the storage medium 4 and stores it in the map buffer 12 (step 203). The slide display generator 22 generates a map image around the first right-left turn intersection using the map information read into the map buffer 12, and displays the map image on the display device 3 together with the guidance route (step 204, FIG. 1A )reference). Here, the slide display generation unit 22 counts the display time and checks whether a predetermined time has elapsed (step 205). After elapse, i + 1 → i is set (step 206, i = 2), the process proceeds to step 203, and the node whose flag content is “1” is set as the ith right / left turn intersection, and the subsequent processing is repeated. Step 20
If it is determined in step 5 that the display time does not exceed the predetermined time, it is checked whether or not the driver has performed an operation of stopping automatic feeding (step 207). When the automatic feed stop operation is performed, the slide display generation unit 22 checks whether or not the automatic feed start operation has been performed by the driver next while continuing to display the map of the intersection where the right / left turn is being displayed (step S1). 208) If so, the process proceeds to step 206 to prepare for displaying the next right / left intersection, and if there is no start operation, the map display around the right / left intersection during display is continued.
If it is determined in step 207 that the operation of stopping the automatic feed has not been performed by the driver, it is checked whether the operation of terminating the "slide display" function has been performed (step 209). If the ending operation is not performed, the process returns to step 204, and if the ending operation is performed, the “slide display” function of the guidance route is ended.

In the above, the processing of the first guidance route display method (one slide display) has been described. However, the number of right / left intersections to be searched is n and the number of right / left intersections to be displayed on the screen is also n. , The second guidance route display method (display of a plurality of slides) can be displayed by the same processing.

[0015]

As described above, according to the present invention, by displaying the map around the intersection where the vehicle turns right and left, which is an important point on the guide route, in the order of travel, the driver can easily image the guide route to be driven. You can figure out.
Further, according to the present invention, it is possible to confirm on a single screen the map around a predetermined number of right and left intersections, which are important points on the guidance route, and the distance to the predetermined right / left intersection, and the driver will now drive. It is possible to easily grasp the image of the guidance route to be set.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory diagram of a first guidance route display method (one slide display) of the present invention.

FIG. 2 is a schematic explanatory view of a second guidance route display method (a plurality of slide displays) of the present invention.

FIG. 3 is a configuration diagram of a navigation device of the present invention.

FIG. 4 is an explanatory diagram of guidance route data stored in a guidance route memory.

FIG. 5 is a diagram showing a processing flow (manual page turning) of the first guidance route display of the present invention.

FIG. 6 is a diagram showing a processing flow (automatic page feed) of the first guidance route display of the present invention.

FIG. 7 is a diagram showing a conventional guidance route display method.

[Explanation of symbols]

 GRT ・ ・ Guidance route RM ・ ・ Landmark MP1-3 ・ ・ Map around the intersection that turns right and left MP4 ・ ・ Map around the destination

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C032 HB06 HC26 HD16 HD21 2F029 AA02 AB01 AB07 AB09 AC01 AC02 AC04 AC09 AC18 5H180 AA01 BB13 FF04 FF05 FF22 FF25 FF27 FF32 FF38

Claims (3)

[Claims] 1. A guidance route display method of a navigation device for searching for a guidance route to a destination and displaying a key point of the searched guidance route, wherein an intersection where a right or left turn is made on the guidance route is searched for. A navigation route display method for a navigation device, comprising displaying surrounding maps on a predetermined scale in the order of progress. 2. A method according to claim 1, wherein the memory for storing the guidance route stores a straight line and a right or left turn at an intersection forming the guidance route, and searches for an intersection to make a right or left turn using the stored information. Item 2. The guidance route display method for a navigation device according to Item 1. 3. The navigation route display method according to claim 1, wherein a display screen is divided and a predetermined number of maps around the intersection are displayed on one screen.