JPH04371990A - Course guidance display method of on-vehicle navigation system - Google Patents

Abstract

PURPOSE:To enable a driver to recognize a course to a destination at all times by displaying various routes on a display screen in an identifiable state. CONSTITUTION:This system is equipped with a distance sensor 22 which detects the travel distance of a vehicle, an azimuth sensor 23 which detects the travel direction of the vehicle, an arithmetic processor 21 which finds a position of the moving body on two-dimensional coordinates at each unit travel distance by sequential arithmetic according to sensor outputs and performs centralized control over the whole system, a road data storage device, a map data storage medium 25 stored with map information, an operation part 26, a display device 27, and a receiver 28. Then roads 3 and a travel courses 2 extending to the position P of this vehicle are displayed on a map 10. In this case, several travel routes between the vehicle position P and destination are considered, but, for example, the shortest-distance route 5 among those routes is displayed by red blinking and the shortest-time route 6 is displayed by blue blinking.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for displaying route guidance in a vehicle navigation system.

0002

2. Description of the Related Art In-vehicle navigation systems employ various methods to guide the vehicle to its destination.

[0003] Typical conventional display methods include a voice guidance method, a simple navigation method, and a method of displaying the position of the vehicle and a straight line to the destination on the screen. The voice guidance method is a method in which, for example, when turning at an intersection, a voice message such as "Please turn right" is used to guide the vehicle to the destination.

The simple navigation method is a method of guiding one's own vehicle to a destination by displaying a guidance display 1 as shown in FIG. 4 on a display screen or on a windshield.

[0005] Furthermore, the method of displaying the position of the own vehicle and a straight line to the destination on the screen is a method of displaying the shortest distance 4 between the position of the own vehicle P and the destination D as a straight line on the map 10, as shown in FIG. It is. On the map 10, there is a road 3 near the own vehicle position P.
is displayed, and furthermore, the trajectory 2 along which the own vehicle has traveled is shown on this road 3 as a dotted line or the like. Note that in the straight line display method shown in FIG. 4, the vehicle position P and the destination D are only shown as a straight line, so it is up to the driver to decide which road 3 to take to reach the destination D. There is.

[0006]

The conventional guidance methods described above each have the following problems. First, with the voice guidance method, if the driver is listening to music or the like while driving, the driver may miss the guidance voice, or the driver may find the guidance voice itself annoying. In addition, with the simple navigation guidance method, a guidance display is displayed several meters before the intersection at which the driver should turn, and once the driver has passed the intersection, it disappears and is replaced by the next display, so there is a possibility that the driver may overlook the guidance display. expensive. Furthermore, in the method of displaying the shortest distance to the destination in a straight line, only a straight line is displayed between the vehicle position P and the destination D, which places a heavy burden on the driver in deciding which road to drive on.

The present invention has been made in order to solve the various problems mentioned above, and it is possible to prevent the driver from overlooking or failing to hear the guidance display, and also to avoid annoying the driver and to improve the driver's judgment. An object of the present invention is to provide a route guidance display method for an in-vehicle navigation system that can minimize the amount of traffic.

[0008]

[Means for Solving the Problems] The present invention displays road map data stored in a map data storage medium on a display screen, and displays the driving route between the own vehicle position and the destination on the road. In a route guidance display method for an in-vehicle navigation system that displays on a map, the driving route is displayed in a manner that allows each purpose to be distinguished from the other. Note that the term "by purpose" here means the shortest distance route, shortest time route, or toll road detour route between the own vehicle position and the destination.

[0009]

[Operation] In the present invention, the own vehicle position and the driving route to the destination can be distinguished from each other according to the purpose, for example, the shortest distance route.
Routes are indicated by red dots, and shortest routes are indicated by blue dots. Therefore, the driver can select and drive a driving route that meets his/her purpose by looking at this dot array display.

0010

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. FIG. 2 is a block diagram showing the configuration of an on-vehicle navigation system for implementing the route guidance display method of the present invention.

This in-vehicle navigation system includes a distance sensor 22 that detects the distance traveled by the vehicle, a direction sensor 23 that detects the direction in which the vehicle travels, and a distance sensor 23 that detects the traveling direction of the vehicle. An arithmetic processing device 21 that calculates positions on two-dimensional coordinates through sequential calculations and centrally controls the entire system, and a road data storage device 2
4. The configuration includes a map data storage medium 25 storing map information, an operation section 26, a display device 27, and a receiver 28.

FIG. 3 shows an example of a route guidance screen displayed on the display device 27 according to the route guidance display method of the present invention. On the map 10, a road 3 and a travel trajectory 2 leading to the own vehicle position P are displayed. In this case, several travel routes can be considered between the own vehicle position P and the destination D, but in the present invention, from among these multiple routes, for example, the shortest distance route 5 is selected as the route marked in red. The shortest time rule will be displayed by blinking.
6 is displayed blinking in blue.

FIG. 1 is a flowchart showing an example of the display procedure of the guidance display method of the present invention. First, road map data is retrieved from the map data storage medium 25 such as a CD-ROM (step 101), and is displayed on the display screen of the display device 27. Next, the vehicle position is detected from the sensors 22, 23 and the data stored in the road data storage device 24, and this is displayed superimposed on the displayed road map. Next, the road data is combined to determine a travel route between the own vehicle position and the destination (step 102).

Next, traffic congestion information regarding the determined driving route is taken in from the outside via the receiver 28 (step 1).
03). Next, the shortest distance route is determined based on the combined road data (step 104), and this is displayed as the shortest distance route 5 as a red dot array on the display screen. Furthermore, the shortest route 6 is determined based on the combined road data and the traffic congestion information for each route described above, and this is displayed on the road as a blue dot array (step 105).
.

Furthermore, when the purpose is to detour around a toll road, information on whether or not it is a toll road is extracted from the displayed road map data, and this is used to create a route for detouring around the toll road.
This is then displayed on the map, for example, as a series of yellow dots.

In this way, each route is finally displayed on the road map as a series of dots, color-coded according to its purpose (step 1).
06). Note that the display of travel routes by purpose is not limited to the above-described embodiment, and is not limited to color-coded display or dot array display as long as each display is distinguishable. Furthermore, the display by purpose is not limited to the shortest route, shortest distance route, or toll road detour route; for example, a traffic jam detour route can also be selected as the target route.

[0017] In selecting these routes for each purpose, it is possible to take into account not only the road map data but also various types of information taken in from outside.

[0018]

Effects of the Invention As described above in detail based on the embodiments, the present invention displays various routes for each purpose on the display screen in a distinguishable manner, so that the driver always knows the route to the destination. can be recognized. In addition, the driver will not miss or overlook guidance information.
Moreover, since the display is performed in a manner that makes it easy to distinguish from roads and tracks, the burden on the driver can be reduced. Furthermore, since the route guidance display is performed according to the purpose, there is an advantage that the driver can not only be guided to the destination but also select a route as appropriate depending on the convenience and mood of the driver at the time.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing an example of the guidance display method of the present invention.

FIG. 2 is a diagram showing the configuration of an in-vehicle navigation system that implements the guidance display method of the present invention.

FIG. 3 is a diagram showing an example of a route guidance screen displayed by the guidance display method of the present invention.

FIG. 4 is a diagram showing an example of a screen displayed using a conventional simple navigation display method.

FIG. 5 is a diagram showing an example of a display screen displayed using a conventional linear display method.

[Explanation of symbols]

2 Trajectory 3 Road 4 Displays the shortest straight line to the destination. 5 Shortest route 6
Shortest route 10
Map P Vehicle position D Destination.

Claims (3)

[Claims] 1. An in-vehicle navigation system that displays road map data stored in a map data storage medium on a display screen, and displays a driving route between the own vehicle position and a destination on the road map. −
1. A route guidance display method for an in-vehicle navigation system, characterized in that the route guidance display method for an in-vehicle navigation system is characterized in that the driving route is displayed in a manner that allows each route to be distinguished from the other for each purpose. 2. The route guidance display method in an in-vehicle navigation system according to claim 1, wherein the purpose is the shortest distance, the shortest time, and/or a detour around a toll road. 3. The route guidance display method in an on-vehicle navigation system according to claim 2, wherein when determining the shortest distance travel route, traffic congestion information for each travel route is referred to.