JP2002303521A - Navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out route guidance close to reality by taking a viewpoint of a vehicle driver into consideration in an intersection an the like. SOLUTION: In a display, a guiding route 54 around the intersection 53 of three-dimensionally indicated roads 51 and 52 is displayed in the position raised from the surfaces of the roads 51 and 52. A shadow 55 of the guiding route 54 is added for clarifying its height. When either of the roads 51 and 52 is an elevated road, the height of the guiding route 54 is displayed to appear more higher.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device mounted on a vehicle such as an automobile and guiding a traveling route searched in advance by image display while detecting the current position of the vehicle.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Unexamined Patent Publication No.
BACKGROUND ART As shown in the prior art such as 01, a navigation device that performs route guidance based on road network information is used. In the route guidance by the navigation device, data such as a departure point, a destination point, and a relay point on the way are input before the vehicle travels, an appropriate route is searched using a method such as the Dijkstra method, and is temporarily stored as a guidance route. Is done. When a vehicle travels on a guidance route, route guidance is performed by an enlarged display at a guidance point such as an intersection.

[0003] Fig. 8 shows a typical display screen for displaying a three-dimensional (3D) enlarged view of an intersection and displaying a guide route on a road. Road 1 visible vertically and Road 2 visible horizontally
And intersect at intersection 3. The guide route 4 displayed according to the result of the route search is displayed so as to turn right at the intersection 3 from the road 1 to the road 2.

[0004]

Since the display of the guide route 4 in the conventional navigation device as shown in FIG. 8 is performed flat on the roads 1 and 2, it is not always easy to understand. . This is because the driver of the vehicle drives the vehicle from a position at a certain height from the road surface as a viewpoint, so that when the flat guide route 4 is displayed, a sense of incompatibility with the viewpoint having the height occurs. In particular, in FIG. 8, a three-dimensional display is performed on the intersection 3 by the perspective projection method, and the display of the intersection 3 is performed in consideration of the viewpoint of the driver of the vehicle. It has not been ignored.

An object of the present invention is to provide a navigation device capable of performing route guidance in consideration of the viewpoint of a driver of a vehicle.

[0006]

SUMMARY OF THE INVENTION The present invention searches for a travel route between points and displays a guide route on a road according to the current position of the vehicle when the vehicle travels on the searched route. The navigation device according to claim 1, further comprising a guidance display unit that performs display including a shadow so that the guide route has a certain height on the road together with the three-dimensionally represented road.

According to the present invention, when the vehicle actually travels or simulates traveling on the previously searched travel route, the guidance display means expresses the road three-dimensionally and displays the road on the road. Since the guidance route to be displayed is displayed including a shadow so as to have a certain height on the road, it is possible to perform easy-to-understand route guidance with a feeling close to the state seen from the viewpoint of the driver of the vehicle.

Further, the present invention relates to a navigation device for searching for a travel route between points and displaying a guide route on a road according to the current position of the vehicle when the vehicle travels on the searched route. A navigation device, comprising: height determining means for determining the height of a road; and guide displaying means for displaying a guide route as if there is a height on a road according to the determination by the height determining means. is there.

According to the present invention, when the vehicle actually travels or simulates traveling on the traveling route searched in advance, the guidance display means includes a height discriminating means for the road for which the route guidance is provided. According to the determination result of the above, the guide route is displayed so as to have a height on the road, so that the vertical relationship around the guide point can be displayed in an easily understandable manner.

[0010] In the present invention, the guide display means may include, when there is a road that intersects a road through which the guide route passes, if the road that intersects the road through which the guide route is located at a higher position, The display of a portion passing under a road where the vehicle crosses is performed in a state different from other portions.

According to the present invention, when the road intersecting with the road on which the guidance is to be displayed is located at a high position, the guidance display means displays a portion passing below the road. Since it is performed in a state different from the other parts, it is possible to display at a glance that the route is under the elevated road.

In the present invention, the guide display means displays, on the guide route, a portion of the guide route on which the vehicle has already traveled, as an indicator on the guide route. When a road crossing the guide route is higher than a road crossing the guide route, the indicator of a portion passing below the road crossing the guide route is displayed in a state different from other portions. And

According to the present invention, the guide display means not only displays a guide route on a road in route guidance at an intersection or the like, but also displays, on the guide route, a portion where the vehicle has traveled so far as an indicator. Furthermore, when that part passes under the elevated road, it is displayed in a state different from the other parts, so that it is possible to perform route guidance that makes it easy to understand that the part passes under the elevated road.

Further, in the present invention, the guide display means draws a shadow on the guide route displayed on the road and displays the guide route so as to have a height.

According to the present invention, since a shadow is drawn on the guide route and displayed so as to have a height, the route guide display can be easily understood by a simple drawing process.

[0016]

FIG. 1 shows a schematic electrical configuration of a navigation device 10 which is a basic embodiment of the present invention. In the navigation device 10, the processing unit 11 causes the guidance display unit 12 to display a road map for route guidance and the like. The road network information stored in the CD-ROM 13 expresses roads as combination data of nodes and links. The nodes indicate the coordinates of the position and the connection relationship with other nodes, and the links indicate the length and direction between the nodes. Further, for a road, information indicating the distinction between a general road, an expressway, a toll road, a motorway, and the like is stored as a link, and data indicating whether or not the road is an elevated road is also stored. Further, information on a road intersecting with the road is also stored.

The data stored in the CD-ROM 13 is electrically read by a CD-ROM driver 14. The data stored in the CD-ROM 13 is
Since information is added so that errors are easy to correct,
The data is converted into data to be processed by the processing means 11 by the CD-ROM decoder 15. The starting point, the destination point, and the
Input of a relay point or the like can be performed from the input device 16. The input device 16 is realized by a keyboard of a remote controller or the like. The detection circuit detects a power-on state. The power supply voltage is stabilized by the regulator 18 and supplied to each part of the navigation device 10. A power switch 19 is provided between a power source such as an automobile battery and the regulator 18.

In the navigation device 10, an azimuth sensor 21, an angle sensor 22, and a distance sensor 23 are detected via an interface 20 in order to detect the current position of the vehicle.
And a GPS device 24 and the like. Orientation sensor 2
1 detects the traveling direction of the vehicle as an absolute direction from, for example, an indicator. The angular velocity sensor 22 detects a change in the traveling direction of the vehicle as an angular velocity using, for example, a vibration gyro. The distance sensor 23 detects a traveling distance of the vehicle. The GPS device 24 receives radio waves from a plurality of GPS artificial satellites and detects the current position of the vehicle as absolute position coordinates. The current position of the vehicle can be detected by only a part of them. For example, the current position can be detected only by the GPS device 24. Also, a combination of the direction sensor 21 and the distance sensor 23 or the angular velocity sensor 22
And the distance sensor 23, the current position of the vehicle can be relatively detected by dead reckoning navigation.

The interface 20 is connected to the processing means 11 and the guidance display means 12 via a system bus line 25.
Connected to. CPU 26, RO
M27, RAM 28, and the like are included, and perform route search and route guidance processing according to a program stored in the ROM 27 in advance. The guidance display unit 12 is provided with a display device 30 such as a liquid crystal display device or a cathode ray tube, and is controlled by a display controller 31. A graphic image displayed on the display device 30 is transmitted to a graphic controller 32.
Is once drawn on the graphic memory 33, and an image is displayed on the display device 30 via the display controller 31.

FIG. 2 shows an equivalent logical configuration when the processing means 11 of FIG. 1 operates as a route search device 40 and a route guidance device 41, which are basic functions of the navigation device 10. The route search device 40 is provided with input data such as a departure point, a destination point, or an intermediate pass point of a route to be searched from the input unit of the input device 16 of FIG. The route searching means 43 refers to the map data stored in the CD-ROM 13 on condition that the vehicle passes through each point set in the point setting means 42, determines a guidance route satisfying conditions such as the shortest distance, Search result storage means 44
To memorize. The search result stored in the search result storage means 44 is realized by the display device 30 of the guide display means 12 when the vehicle actually travels along the guide route or as a pseudo drive simulation function without actually running. Can be displayed on the output unit. When the vehicle actually runs, the direction sensor 21 and the angular velocity sensor 2
2. While detecting the current position of the vehicle with the own vehicle position search device including the distance sensor 23 or the GPS 24, the vehicle position can be displayed on the display device 30 together with a road map near the current position.

FIG. 3 shows a first embodiment of the present invention.
Guide route 54 at intersection 53 where roads 51 and 52 intersect
Is displayed in such a way that the vehicle is guided from the viewpoint of the driver of the vehicle by adding a certain height to the guide route with a shadow 55 added thereto. Shadow 55
Even without, the guide route 54 floats from the road 52 under the guide route 54, and thus appears to some extent three-dimensional. If the shadow 55 is added, a more three-dimensional effect can be seen. When the roads 51 and 52 are displayed in a three-dimensional display by the perspective projection method as shown in FIG. 3, route guidance can be performed more effectively.

FIG. 4 shows a procedure for performing the display as shown in FIG. The process starts from step a1 and proceeds to step a2
Then, “height” is added to the guide route. In step a3, it is determined whether or not the guidance route is on an elevated road. If it is determined that the vehicle is on an elevated road, "height" is further added to the guide route in step a4. When step a4 is completed, or when it is determined in step a3 that the road is not an elevated road, a guide route with a height added is displayed in step a5. In step a6, it is determined whether or not the display of the guide route has been completed. When it is determined that the process is not completed, the process returns to step a2, and when completed, the process of adding the height is completed in step a7.
The drawing of the roads 51 and 52 in FIG. 3 is performed before the addition of the height in FIG.

FIG. 5 shows a second embodiment of the present invention.
A process of adding a shadow 55 to the guide route 54 as shown in FIG. 3 and representing the height is shown. The process starts from step b1, and in step b2, it is determined whether the guide route 54 is on an elevated road. When it is judged that it is on an elevated road,
In step b3, "height" is added to the shadow of the guide route. When step b3 is completed, or when it is determined in step b2 that the guide route 54 is not on an elevated road, a shadow 55 of the guide route 54 is displayed in step b4. In step b5, it is determined whether or not the drawing for the guide route 54 has been completed. Step b if not completed
Returning to step 2, if completed, the drawing processing in step b6 ends.

FIG. 6 shows a third embodiment of the present invention.
3D shows a stereoscopic display when passing under an elevated road. FIG.
As shown in (a), a portion different from the other portions, such as hatching, is displayed on a portion where the guide route 54 on the road 51 passes below the elevated road 56. The part passing under the elevated road 56 is hatched with a pattern such as diagonal lines, or is colored lighter or darker than other parts so that it can be seen at a glance that it passes under the elevated road 56. indicate. FIG. 6B illustrates a state in which a general road 52 exists below an elevated road 56, and the guide route 58 turns left at the intersection 57 in the direction of the lower road 52. The guide route 58 of the portion below the elevated road 56 is displayed in a state different from other portions such as hatching.

FIG. 7 shows a fourth embodiment of the present invention.
A plan guidance display for enlarging and guiding around the intersection 53 is shown. In FIG. 7A, an indicator 60 indicating a portion where the vehicle has already traveled is displayed on the guide route 59. As shown in FIG. 7B, when the indicator 60 also passes under the elevated road 56, if the indicator 60 is displayed in a state different from other parts, for example, by hatching, the indicator 60 can be displayed below the elevated road. Can be easily recognized at a glance. The display of the indicator 60 can also be performed on a stereoscopic display as shown in FIG.

[0026]

As described above, according to the present invention, a guide route for displaying a previously searched route on a road is displayed in such a manner that the guide route includes a shadow so as to have a certain height from the road which is three-dimensionally represented. , It is possible to provide easy-to-understand route guidance with a feeling close to the state seen from the viewpoint of the driver of the vehicle.

Further, according to the present invention, the guide route displayed on the road is displayed so as to have a height corresponding to the height of the road, so that the vertical relationship near the guide point is displayed in an easily understandable manner. be able to.

Further, according to the present invention, it is possible to provide an easy-to-understand display at a glance when the guide route passes under an elevated road.

Further, according to the present invention, when a portion which the vehicle has already passed on the guide route is displayed as an indicator,
The display of the portion passing under the elevated road can be easily understood.

Further, according to the present invention, a guide route displayed on a road is drawn with a shadow so as to have a height, so that easy-to-understand guidance can be provided by simple image processing.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic electrical configuration of a basic embodiment of the present invention.

FIG. 2 is a block diagram showing a logical configuration for route search and route guidance by the navigation device 10 of FIG.

FIG. 3 is a diagram showing an intersection guidance screen according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing a treatment procedure according to the embodiment of FIG. 3;

FIG. 5 is a flowchart illustrating a processing procedure according to a second embodiment of the present invention.

FIG. 6 is a diagram showing a guidance screen at an intersection according to a third embodiment of the present invention.

FIG. 7 is a diagram showing a guidance screen at an intersection according to a fourth embodiment of the present invention.

FIG. 8 is an enlarged view of an intersection of a conventional navigation device.

[Explanation of symbols]

 Reference Signs List 10 navigation device 11 processing means 12 guidance display means 13 CD-ROM 16 input device 21 azimuth sensor 22 angular velocity sensor 23 distance sensor 24 GPS device 26 CPU 27 ROM 28 RAM 30 display device 31 display controller 32 graphic controller 33 graphic memory 40 route search Device 41 Route guidance device 42 Point setting means 43 Route search means 44 Search result storage means 51, 52 Road 53, 57 Intersection 54, 58, 59 Guide route 55 Shadow 56 Elevated road 60 Indicator

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C032 HB22 HC08 HC15 HC22 HC23 HD03 HD16 2F029 AA02 AB01 AB07 AC02 AC04 AC09 AC14 5H180 AA01 BB13 FF04 FF05 FF23 FF24 FF27 FF35

Claims (5)

[Claims] 1. A navigation device that searches for a travel route between points and displays a guide route on a road according to a current position of the vehicle when the vehicle travels on the searched route. A navigation apparatus, comprising: a guide display unit that performs display including a shadow so that a guide route has a certain height on the road together with the represented road. 2. A navigation device for searching a travel route between points and displaying a guide route on a road according to a current position of the vehicle when the vehicle travels on the searched route. A navigation device, comprising: height determining means for determining the height; and guide displaying means for displaying a guide route so that it has a height on a road according to the determination by the height determining means. 3. The guide display means intersects with a road on which the guide route passes when there is a road that intersects with the road on which the guide route passes. 3. The navigation device according to claim 1, wherein the display of a part passing under the road is performed in a state different from other parts. 4. The guide display means displays, on the guide route, a portion of the guide route on which the vehicle has already traveled as an indicator, and when there is a road intersecting with the road through which the guide route passes, the guide route is displayed. When a road that intersects is higher than a road that passes, an indicator of a portion that passes under the road that the guidance route intersects is displayed in a state different from other portions. Item 1 or 2
A navigation device as described. 5. The navigation device according to claim 2, wherein the guidance display means draws a shadow on the guidance route displayed on the road and displays the guidance route so as to have a height. .