JP3460697B2 - Display control device for vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle display control device for storing map information of a region where a vehicle travels in advance in a storage means and displaying a map based on the map information on a display means installed in the vehicle. Regarding

[0002]

2. Description of the Related Art Map information is stored in advance in a storage means such as a CD-ROM and the current position of the vehicle is detected by the position detection means while a map of the surrounding area in which the vehicle is traveling is displayed on an in-vehicle display. At the same time, a vehicle map display device for displaying the current position of the vehicle on the map is known (for example,
See Japanese Patent Application Laid-Open No. 1-217210, etc.).

[0003]

However, in the conventional map display device of this type, for example, a new road or an interchange that is scheduled to be newly opened is not displayed or displayed by a virtual line. , The information of the opening date was never displayed.

Therefore, at some point while driving a car,
For example, even when a new road or a new interchange is already open, the driver cannot check them on the display screen, so when selecting a road while traveling,
There was a problem that the range of road selection could be narrowed.

Further, there is a technique for correcting the current position of the vehicle by the map matching method, but even if a new road or new interchange that was scheduled to be opened is displayed on the map, the current position of the road or interchange will be displayed. Corrections are not compensated.

The present invention has been made to solve the above problems, and displays map information such as new roads and new interchanges that are scheduled to be opened at the time of use, and displays the displayed new roads and new roads. It is an object of the present invention to provide a vehicle display control device capable of correcting the current position for an interchange.

[0007]

In order to achieve the above object, according to the present invention, a new road or new interchange is displayed on the display means when a predetermined condition is satisfied, and the new road or new road is displayed. Since the current position is corrected to the interchange, it is possible to display the map information of the new road or the new interchange scheduled to be opened at the time of use, and correct the current position of the displayed new road or the new interchange.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a vehicle display control device. This map display device is configured with the microcomputer 1 as a main part, and displays a map around the current position of the vehicle, which will be described later, based on program data stored in advance in the ROM, with modified map information added, and , Calculates the current position of the vehicle based on the azimuth data of the vehicle and the mileage data, and displays the current position on the map.

Reference numeral 2 is a CD-RO as a map information storage means.
A map of an area in which the vehicle can travel is divided into appropriate ranges at various scales and written as map information. In addition to the normal map information, this CD-ROM 2 also stores changed map information to be changed, such as new roads and highway interchanges planned to be constructed in the future, facilities planned to be constructed or abolished, and the like. For the changed map information, scheduled change dates (including time in some cases) such as opening dates and abolition dates are stored.

Reference numeral 3 denotes a CD drive for driving the CD-ROM 2 to read out the map information. The CD drive 3 is connected to the input / output circuit of the microcomputer 1 via the decoder 4 and sends the read map information to the microcomputer 1.

As a map information storage means, a CD-R
Besides the OM, an IC card, an optical disk, etc. can be used.

Reference numeral 5 is a display device such as a CRT which is installed in the vehicle compartment and displays the above map, and is connected to a display controller 6 which controls the display. The display controller 6 is connected to the input / output circuit of the microcomputer 1 and stores the image data sent from the microcomputer 1 in the image memory 7
Then, the map including the current position of the vehicle is displayed on the display unit 5.

Further, 8 is a geomagnetic sensor attached to the vehicle body, which detects the geomagnetism crossing the vehicle body and sends the signal to the microcomputer 1. 9 is a vehicle speed sensor attached to the vehicle, which detects the rotational speed of the driven wheels of the vehicle,
The detection signal is sent to the microcomputer 1. The microcomputer 1 calculates the traveling distance of the vehicle based on the vehicle speed signal from the vehicle speed sensor 9, and calculates the traveling direction based on the geomagnetism detected by the geomagnetic sensor 8 every time the vehicle travels the unit traveling distance. Then, by repeating the traveling distance and traveling azimuth calculation processing from the reference position, the current position of the vehicle is calculated and displayed on the map of the display.

Therefore, the microcomputer 1, the geomagnetic sensor 8 and the vehicle speed sensor 9 constitute the present position recognizing means, but the GPS for receiving the positioning radio wave from the artificial satellite and determining the receiving position, or A device such as a gyro compass can be used as the position detecting means.

Reference numeral 10 is a calendar circuit that constantly counts clock signals to measure time and date. The calendar circuit 10 is connected to the input / output circuit of the microcomputer 1. The calendar function may be built in the microcomputer 1 instead of the external circuit.

Next, the operation of the vehicular display control device having the above configuration will be described with reference to the flowchart of FIG.

For example, when the vehicle starts traveling from a stopped state, its position is calculated at the time of the previous traveling and is stored in the RAM as a stopped position.
The CD drive 3 is driven to read the map information around the current position of the vehicle from the CD-ROM 2 and temporarily store it in the RAM (step 100).

Next, the CPU of the microcomputer 1
At step 110, it is determined whether or not the read map information includes changed map information such as roads to be opened, roads to be abolished, and interchanges to be newly established. In step 120, if there is no changed map information, then step 140 is performed.

In step 120, the calendar circuit 10
Current date sent by (may include time)
And the scheduled change date (including time in some cases) attached to the changed map information are compared, and if the current date is after the scheduled change date, the process proceeds to step 130 and the current date is scheduled to be changed. If it is before the day, go to step 140.

Then, in step 130, the CPU sends the image data obtained by adding the changed map information (new roads, interchanges, etc. which have already been opened) to the map information to be displayed, to the display controller 6, and the display device 5 To display the map.

On the other hand, in step 140, the map information in the state where there is no changed map information or the state where it is not changed is sent to the display controller 6 and the map is displayed on the display unit 5.

Next, the CPU of the microcomputer 1
Calculates the traveling distance of the vehicle based on the vehicle speed signal from the vehicle speed sensor 9 in step 150, and calculates the traveling direction based on the geomagnetism detected by the geomagnetic sensor 8 every time the vehicle travels the unit traveling distance. To do. Furthermore, by repeating the process of calculating the traveling distance and traveling direction from the reference position,
Calculate the current position of the vehicle. And step 160
Then, the current position of the vehicle is displayed on the map of the display unit 5.

As described above, when there is changed map information in the displayed map, the scheduled change date is compared with the current date, and when the current date is after the scheduled change date, the map information is CD. -When it is written in ROM2, even roads and interchanges that are planned to be built will be displayed as already opened roads and interchanges, and the driver can easily recognize the effectiveness of the new roads and interchanges from the map. You can, and if necessary, select the road or interchange to go through.

In step 160, when the current position of the vehicle is corrected by the so-called map matching method, when the calculated current position of the vehicle is off the road, the vehicle is traveling. A correction process is performed so as to specify an estimated nearby road on the map and correct the current position on the road.

When the current position of the vehicle is corrected by such a map matching method, as to the map having the map information to be changed, as described above, it is judged whether the change is completed at the time of use and the change is completed. If so, the corrected map information is used to correct the current position by map matching. Therefore, for example, when a vehicle travels on a new road or a new interchange, the changed map information can be used to accurately correct the current position of the vehicle and display the current position without error. It can be performed.

[Brief description of drawings]

FIG. 1 is a block diagram of a map display device showing an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the same device.

[Explanation of symbols]

1-microcomputer, 2-CD-ROM, 5-indicator, 8-geomagnetic sensor, 9-vehicle speed sensor, 10-calendar circuit.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI G09B 29/10 G09B 29/10 A (58) Fields investigated (Int.Cl. ⁷ , DB name) G01C 21 / 00-21 / 36 G01C 23/00-25/00 G08G 1/00-9/02 G09B 23/00-29/14 G06T 11/60

Claims (4)

(57) [Claims] 1. A map display device for a vehicle, comprising: a current position detection means, a map information storage means, a display means, and a timing means for timing the flow of time, wherein the display means can display the current position and a map. The map information storage means stores display information relating to a new road or a new interchange that does not validate the display on the display means until the time measurement result of the time measurement means reaches a predetermined time. When the timing result reaches the predetermined time, a control means for allowing the display means to display a new road or a new interchange based on the display information stored in the map information storage means, and the display means allowed by the control means. Current position correction for correcting the current position detected by the current position detection means on the new road or new interchange displayed on A display control device for a vehicle, comprising: a positive means. 2. A storage means for storing data of an unopened road or an interchange, and a display means for reading out the unopened road or the interchange from the storage means when the unopened road or the interchange is opened when a predetermined condition is satisfied. The display control device for a vehicle, comprising: a control unit for displaying the current position and a current position correcting unit for correcting the detected current position on the unopened road or the interchange displayed by the control unit. 3. Current position detection means, display means, storage means for storing data relating to a road to be constructed or an interchange on the road, and the road or interchange constructed when a predetermined condition is satisfied. As a control means for validating the display of the road or the interchange on the display means, and a current position correcting means for correcting the detected current position by the current position detecting means on the road or interchange validated and displayed by the control means. A display control device for a vehicle, comprising: 4. The predetermined condition for determining that an unopened road or an interchange has been opened is that the scheduled opening date or the scheduled opening date and time set in the unopened road data or the interchange has been reached. Vehicle display control device.