JPH08184457A - Vehicle-mounted navigation device - Google Patents

Abstract

PURPOSE: To provide a vehicle-mounted navigation device which can guide a route properly. CONSTITUTION: A vehicle-mounted navigation device measures a current location, reads a map information from a storage based on the measurement result, and guides for a route. A display 13 for showing route guide is located at the front in the visual field of a user 15 in the room of a vehicle 14. When the vehicle approaches a point where an advance-direction judgment is required, a three-dimensional image 19 is displayed by a system controller in the display 13 using the perspective similar to the road shape of the point.

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 which can favorably guide a route.

[0002]

2. Description of the Related Art Map information is stored in a storage device, and detection signals from a traveling state detection sensor group such as an orientation sensor, an angular velocity sensor, and a distance sensor installed in a vehicle and a GPS (Glob) are stored.
A device called an al Positioning System) receives position signals such as latitude and longitude information from satellites, measures the current position, which is the position of the vehicle, by some or both of these detection signals and position signals, and based on this measurement result. Various in-vehicle navigation devices that read map information from the storage device and display the current location on a display device have been put into practical use (for example, JP-A-6-88731, JP-A-6-94467, and JP-A-6-94467). -221861).

Such an on-vehicle navigation system has driving information in the vicinity of the present location or in response to a user's (eg, driver's) request according to the ever-changing current location (eg, from a departure point when the user sets a route in advance). Distance, elapsed time, distance to destination, expected arrival time, route guidance) are read from the storage device and displayed on a display device such as a liquid crystal display device (LCD) or cathode ray tube (CRT) or enlarged map information. The map information is a plane display in which graphics such as arrows and symbols and letters, numbers, symbols and the like are combined (see, for example, JP-A-6-66918).

[0004]

[Problems to be Solved by the Invention]
For example, if there is no great difficulty in interpreting the distance from the place of departure, the elapsed time, the distance to the destination, the expected arrival time, etc., the above-mentioned plane display may be used. It is no exaggeration to say that the quality of the item determines the utility value of the vehicle-mounted navigation device, and a display that is easy for the user to understand is required, and various attempts have been made.

Specifically, when approaching a point such as an intersection that requires judgment of the direction of travel, it is common to display an arrow indicating the direction of travel at the relevant point in the map information displayed on the display device. However, it is difficult to determine with certainty which point in the forward landscape the user actually visually recognizes the display location of the arrow. That is, for example, when the corresponding point is a crossroad and several crossroads are visible in the front, there is a problem that it is very confusing to determine in what time the crossroad indicated by the arrow is the crossroad in a short time. .

[0006]

In order to solve the above-mentioned problems, the present invention provides a vehicle-mounted navigation device that measures a current position, reads map information from a storage device based on the measurement result, and guides a route in a vehicle interior. A display device for route guidance display located in front of the user's field of view and a three-dimensional route guidance using a perspective method close to the road shape at that point on the display device when approaching a point requiring traveling direction judgment. And a system controller for displaying an image to be performed.

Further, according to the present invention, in a vehicle-mounted navigation device that measures a current position, reads map information from a storage device based on the measurement result, and guides a route, the route is located in front of the visual field of the user in the vehicle compartment. A display device for guidance display, a photographing device that photographs the front of the vehicle when approaching a point that needs to determine the traveling direction, and a perspective method close to the road shape by extracting only the road shape based on the image data taken by this photographing device. And a system controller for displaying an image for performing a three-dimensional course guidance using.

Further, the present invention is characterized in that the image is displayed as a virtual image in front of the visual field of the user.

[0009]

The image displayed on the display device for the route guidance display has a shape close to the front landscape actually seen by the user, which makes it easy to read the image and enables good route guidance.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle-mounted navigation device according to the present invention will be described below with reference to the embodiments shown in the accompanying drawings.

In the first embodiment shown in FIGS. 1 to 4, the azimuth sensor 1a detects the traveling azimuth of the vehicle according to the geomagnetism, the angular velocity sensor 1b detects the angular velocity, and the distance sensor 1c detects the traveling distance. The sensors 1a to 1c constitute the traveling state detection sensor group 1, and the GPS 2 detects the current position of the vehicle from the latitude and longitude information. The detection signal from the traveling state detection sensor group 1 and the position signal from the GPS 2 Via the interface 3 that performs A / D conversion, etc.
The data is supplied to the CPU 4 which calculates the amount of movement based on the data from the interface 3 and performs calculations for performing various image data processing.

The CPU 5 has RAMs 5 and C in which information necessary for executing a program is written and read.
A ROM 6 in which various processing programs of the PU 4 and necessary information are stored in advance, a storage device 7 including a storage medium such as a CD-ROM or an IC card in which digitized map information is stored, a key operation by a user, for example, An input device 8 including an input operation member such as a keyboard for sending various commands such as route setting to the CPU 4, and graphic data such as map information from V-RAM or the like in response to a command from the CPU 4 and framed screen information that can be immediately displayed. A graphic controller 10 that draws in a buffer memory 9 that temporarily stores and holds as a buffer and that outputs as image information is connected, and these constitute a system controller 11. From a LCD or the like according to the image information from the graphic controller 10. It is said that the display device 12 for displaying map information will perform a predetermined display. Growth is similar to the conventional in-vehicle navigation system, comprising an audio output device (not shown) emits an alarm sound or an electron generated voice to be alerted as required.

Reference numeral 13 is a display device for route guidance display which is newly provided in addition to the display device 12 for displaying map information which is usually installed in the conventional example, and is a display device for route guidance display. It is installed on the dashboard 17 near the windshield 16 so as to be positioned forward in the field of view of the user 15.
Can be confirmed in the visual field, and at the same time, the display device 13 for route guidance display can be visually recognized in the visual field. Then, when approaching a point such as an intersection where judgment of the traveling direction is required, a predetermined graphic data is drawn in the buffer memory 9 according to a command from the CPU 4 and a display described later according to the image information from the graphic controller 10 which outputs the image data as image information. I do.

Next, the display of the display device 13 for the route guidance display will be described with particular reference to FIGS.

When the CPU 4 determines that the vehicle has approached a point such as an intersection that requires the determination of the direction of travel, the graphic controller 10 instructs the CPU 4 to give three-dimensional graphic data using a perspective method close to the road shape at that point. Is displayed in the buffer memory 9 and is output as image information. For example, when the corresponding point is a crossroads and several crossroads are visible in the front, the display device 13 for route guidance display displays a perspective view close to the road shape. The three-dimensional image 19 using is displayed, for example, the traveling direction is indicated by an arrow at the corresponding crossroads. That is, the image 19 displayed on the display device 13 for route guidance display is actually the user.
With a shape close to the landscape 18 in front of which 15 is visually recognized, it is easy to read, and it is possible to perform a good route guidance.

FIGS. 5 and 6 show a second embodiment,
The display device 13 for route guidance display is configured by a virtual image display type called a so-called head-up display embedded in the dashboard 17, and the display of the display device 13 for route guidance display is directly provided on the inner surface of the windshield 16. Image 19 is created by reflecting with a combiner 20 in the form of a half mirror.
Is displayed as a virtual image in front of the field of view of the user 15 and overlaid with the landscape 18. With this configuration, the user 15 can see the landscape 18 in front and the image 19 by the display device 13 for route guidance display without taking a large amount of movement of the line of sight.

FIG. 7 shows a third embodiment, and the reference numerals not shown in FIG. 7 refer to the corresponding portions of the respective embodiments of FIGS. 1 to 6, and a display device for route guidance display. An image 19 to be displayed on 13 is a C image based on actual photographed data by a photographing device 21 such as a small CCD camera for photographing the front of the vehicle 14.
The PU 4 extracts only the road shape, and the graphic controller 10 draws stereoscopic graphic data using the perspective method close to the road shape in the buffer memory 9 according to a command from the CPU 4 and outputs it as image information. By combining this with the map information from the storage device 7, for example, by displaying the traveling direction with an arrow at the corresponding crossroads, the same display as in each of the embodiments can be performed. In this configuration, the image 19 displayed on the display device 13 for the route guidance display is created from the live-action data, and therefore the front scene actually viewed by the user 15 is displayed.
The shape is closer to 18, making it easier to read and providing good route guidance. A technique for capturing a road image and extracting a road shape by image analysis is disclosed in, for example, Japanese Patent Laid-Open No. 6-94470.

Also in the third embodiment, the image 19 may have a structure for visually recognizing the display device 13 for route guidance display, and a structure for visually recognizing a virtual image as in the second embodiment.

In any of the embodiments, a display device 13 for route guidance display is provided in addition to the display device 12 for displaying map information prepared in the conventional vehicle-mounted navigation device, and the display device 13 is provided at a point where the judgment of the traveling direction is required. When approaching, by displaying a stereoscopic image 19 using a perspective method close to the road shape, it is possible to favorably guide the route.

[0020]

INDUSTRIAL APPLICABILITY The present invention is an in-vehicle navigation device that measures the current position, reads map information from the storage device based on the measurement result, and guides the route, and the route is located in the front of the visual field of the user in the vehicle compartment. A display device for guidance display, and a system controller for displaying an image for performing three-dimensional course guidance using a perspective method that is close to the road shape of the point when the point approaches a point that requires determination of the traveling direction. The image displayed on the display device for the route guidance display has a shape close to the scenery in front of the vehicle that is actually viewed by the user, is easy to read, and can guide the route satisfactorily to drive the vehicle. Suitable for

In addition, in a vehicle-mounted navigation device that measures the current position, reads map information from the storage device based on the measurement result, and guides the route, the route guidance display is located in the front of the visual field of the user in the vehicle compartment. A display device, a shooting device that shoots the front of the vehicle when approaching a point that requires judgment of the direction of travel, and a stereoscopic method that uses the perspective method close to the road shape by extracting only the road shape based on the live-action data obtained by this shooting device. And a system controller for displaying an image for performing route guidance, and in addition to the above effects, the road shape displayed by the display device for route guidance display is
Since the image is created from the photographed data, the shape is closer to the front view actually seen by the user, the legibility is easy, the route guidance is good, and it is suitable for driving the vehicle.

Further, according to the present invention, the image is displayed as a virtual image in the front of the user's visual field, and the image is displayed as a virtual image in front of the user's visual field in an overlapping manner with the landscape. The user can see the scenery in front and the image displayed by the display device for route guidance display without taking a large amount of movement of the line of sight, which is suitable for driving the vehicle.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a circuit configuration example of a first embodiment of the present invention.

FIG. 2 is an explanatory view of a main part of a vehicle including the embodiment.

FIG. 3 is an explanatory diagram illustrating a display example of the same embodiment.

FIG. 4 is an enlarged view of a main part of FIG.

FIG. 5 is an explanatory view of a main part of a vehicle equipped with a second embodiment of the present invention.

FIG. 6 is an explanatory diagram illustrating a display example of the same embodiment.

FIG. 7 is an explanatory view of a main part of a vehicle including a third embodiment of the present invention.

[Explanation of symbols]

 7 Storage device 11 System controller 12 Display device for displaying map information 13 Display device for route guidance display 14 Vehicle 15 User 19 Image 21 Imaging device

Claims (3)

[Claims] 1. An in-vehicle navigation device that measures a current location, reads map information from a storage device based on the measurement result, and guides a route, for a route guidance display located in front of a visual field of a user in a vehicle compartment. A display device; and a system controller that displays an image for performing three-dimensional course guidance using a perspective method that is close to the road shape of the point when the point approaches a point that requires determination of the traveling direction. In-vehicle navigation device. 2. An in-vehicle navigation device that measures a current position, reads map information from a storage device based on the measurement result, and guides a route, for a route guidance display located in front of a visual field of a user in a vehicle compartment. A display device, a shooting device that shoots the front of the vehicle when approaching a point that requires judgment of the direction of travel, and a stereoscopic method that uses the perspective method close to the road shape by extracting only the road shape based on the live-action data obtained by this shooting device. A vehicle-mounted navigation device, comprising: a system controller that displays an image for performing a realistic route guidance. 3. The vehicle-mounted navigation device according to claim 1, wherein the image is displayed as a virtual image in front of the visual field of the user.