JPH05273912A - Navigation display system for vehicle - Google Patents

Abstract

PURPOSE:To confirm approach inhibit information just before a vehicle reaches a crossing by displaying a road display state in a vehicle approach inhibit direction in roads to the crossing while making it different from the other road display. CONSTITUTION:When a car approaches the crossing in the advancing direction, for example, a central processing part 16 judges which one of respective roads crossing that road inhibits approach at the crossing, to which the car gets close at present, corresponding to regulation information such as 'one-way', 'dot not enter by no right turn or no left turn' or the like in map information data read from a CD deck 5. In the case of 'do not enter', the display state of the road of 'do not enter' among respective roads on the map of a display device 4 is changed. Namely, when a certain road shows 'do not enter', for example, that road is displayed with a broken line. In this case, this display is not limited to broken line display but the display color of that road can be made different from that of the other roads or the road can be displayed with something except for the broken line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle navigation display system for displaying map information on a vehicle display device.

[0002]

2. Description of the Related Art As a navigation display system for a vehicle of this type, for example, "New Model Car Manual (Y32-1) NIS" issued by Nissan Motor Co., Ltd. in June 1991.
SAN Cedric / Gloria Y32 type car ”, page 69 to page F86.

In this vehicle navigation display system, the map information of the map data unit is read by the arithmetic and control unit and displayed on the display unit, and the position and traveling direction of the vehicle are determined based on the information from the position detecting means. The arithmetic and control unit obtains the information and displays it on the map information displayed on the display unit. In addition to this information, traffic information is also displayed.

As a result, the driver can know the traffic information of the current position and the traveling direction based on the map information.

[0005]

By the way, the road information also includes regulation information such as one-way traffic, right turn prohibition, left turn prohibition, and entry prohibition due to construction. It is desirable that such regulation information can be known before reaching the intersection. Also,
If the traveling direction is prohibited, it is desirable to be able to know that the traveling is prohibited immediately after determining the traveling direction (for example, after operating the turn signal switch).

However, conventionally, these pieces of regulation information have not been included in the map information. For this reason, at the time of reaching the intersection in the traveling direction, the driver visually recognizes the road sign to determine whether the road in the left-right turn direction or the straight direction is prohibited from entering. .

[0007] Therefore, an object of the present invention is to provide a vehicle navigation display system capable of knowing entry prohibition information (regulation information) before the vehicle reaches an intersection.

[0008]

In order to achieve this object, the present invention makes the map information of the map data unit read by the arithmetic and control unit and displays it on the display unit, and at the same time, based on the information from the position detecting unit. In a vehicular navigation display system in which a position and a traveling direction of a vehicle are obtained by the arithmetic and control unit and displayed on the map information displayed on the display unit, the arithmetic and control unit includes the map data unit and the map data unit. The road information that intersects the intersection in the traveling direction of the vehicle is read, and the road display state of the vehicle-entry-prohibited direction among the roads that intersect the intersection displayed on the display device is displayed differently from other road displays. It is characterized by being used as a vehicle navigation display system.

[0009]

According to this structure, the arithmetic and control unit reads the road information intersecting with the intersection in the traveling direction of the vehicle from the map data unit and intersects with the intersection displayed on the display unit. It is possible to display the road display state in the vehicle-prohibited direction on the road differently from other road displays.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, 1 is an automobile (vehicle) such as a passenger car, 2 is a passenger compartment of the automobile 1, 3 is an instrument panel in the front part of the passenger compartment 2, 4 is a CRT arranged on the instrument panel 3, A display device 5 such as a liquid crystal display is a CD deck (map data device) such as a CD-ROM arranged in the rear part of the vehicle compartment 2 for map information.

The CD deck 5 is a device for reproducing the map information recorded on the optical disc. In addition to information such as road layout and place names, this optical disc also has regulatory information such as one-way traffic, prohibition of right turn, and prohibition of entry due to prohibition of left turn.

Further, 6 is a geomagnetic sensor mounted on the roof 1a of the automobile 1 as a direction sensor, and 7 is a gyroscope mounted as an angular velocity sensor at the rear of the passenger compartment 2.

Further, 8 is a beacon antenna arranged at the rear of the passenger compartment 2, and 9 is a beacon receiver connected to the beacon antenna 8. As shown in FIG. 4, the beacon receiver 9 receives radio waves from a road information beacon 10 grounded near an intersection of roads R (not shown in FIG. 4) via a beacon antenna 9. , Outputs a road information signal. The beacon 10 receives road information from the road information center 11 and the like and transmits the road information by mounting it on a radio wave. The road information includes traffic congestion information, regulation information due to road construction and other circumstances.

12 is a global positioning system GPS (Global
Positioning System) GPS antenna, 13 is GP
It is a GPS receiver connected to the S antenna 12. The GPS receiver 13 receives radio waves from the satellite 14 via the GPS antenna 12 and outputs a vehicle position signal. It should be noted that this system utilizes what is used to measure the position of a ship or an aircraft.

Reference numeral 15 denotes a navigation device main body (drive guide control unit) arranged in the rear portion of the passenger compartment 2. The navigation device body 15 has a control circuit including a central processing unit 16 and a system control memory 17 storing the control contents of the central processing unit 16.

The central processing unit 16 includes a geomagnetic sensor 6, a gyroscope 7, a beacon receiver 9, and a GPS receiver 1.
3. Signals from the respective detection means such as the wheel speed sensor 18 (vehicle speed sensor) and the vehicle mission signal transmission section 19 are input. The central processing unit 16 receives the output signals from the turn signal switch 20 and the like via the interface I1 and the map information data from the CD deck 5.

Further, the central processing unit 16 is connected to the display device 4 and the alarm device 21 via the interfaces I2 and I3, respectively.

Next, the function of the control circuit will be described.

When the power of the vehicle is turned on, the control contents stored in the system control memory 17 are read into the central processing unit 16 to bring the display device 4 and the CD deck 5 into a controllable state.

In this state, the map button 4a of the display device 4
When is pressed, the central processing unit 16 receives the position signal from the GPS receiver 13, the direction signal from the geomagnetic sensor 6, the angular velocity signal from the gyroscope 7, the vehicle speed signal from the wheel speed sensor 18 (vehicle speed sensor), In response to forward / backward signals from the vehicle mission signal transmitter 19,
Calculates the current position and direction of travel of the vehicle.

Moreover, the central processing unit 16 reads the map information data including the current position from the CD deck 5 based on the current position information of the vehicle, and displays the map information on the display device 4 based on this data. This map information display mode includes a wide area map mode that displays a large area,
There is a detailed map mode that displays a small area. This mode switching is performed by the mode selection button 4b of the display device 4. 3 and 5 show display examples of the map image when the detailed map mode is selected.

When the detailed map mode is selected, the central processing unit 16 determines the vehicle 1 as shown by the arrow A in FIG.
The current position and the traveling direction of are displayed on the map of the display device 4.

Moreover, the central processing unit 16 determines, for example, when the automobile 1 approaches the intersection S1 in the traveling direction of FIG. 6, "one-way traffic, right turn prohibited," in the map information data read from the CD deck 5. Based on the regulation information such as "entry prohibited due to left turn prohibition", it is determined whether any of the roads a, b, c intersecting the road R at the approaching intersection S1 is currently prohibited.

When entry is prohibited, the road a,
Change the display status of the prohibited entry of b and c.
For example, if the road a is prohibited from entering, the road a is displayed as a broken line as shown in FIG. Similarly, if the road e of the roads d, e, and f is prohibited at the next intersection S2,
After the car 1 has passed the intersection S1 as shown in FIG.
The road e is displayed in broken lines in the same manner as described above.

In the above embodiment, the roads a,
Although the example in which the display of e is displayed as a broken line has been shown, the display color is not necessarily limited to this, and the display color of the roads a and e may be different from that of other roads. Alternatively, a display other than the broken line may be used. Alternatively, the prohibited roads a and e may be displayed by solid lines, and other roads that can be entered may be displayed by broken lines.

As another embodiment, when the automobile 1 approaches the intersection S1 in the traveling direction, the beacon receiver 9 receives the road information signal from the beacon 10 near the intersection S1,
The road information signal may be input to the central processing unit 16 to determine the regulation information. In this case, the central processing unit 16 includes, in the road information signal, restriction information such as "prohibition of entry due to road construction and other circumstances" among the roads a, b, and c intersecting at the intersection S1 that is currently approaching. Set to judge whether or not

Further, as the vehicle 1 approaches the intersection S1 in the traveling direction, the right signal from the turn signal switch 20
A left turn signal is input to the central processing unit 16, and this right / left turn signal is, for example, an entry prohibited direction (in this embodiment, a left turn prohibited direction).
If so, an alarm signal is immediately output from the alarm device 21 to notify the driver of the prohibition of entry.

[0029]

As described above, according to the present invention, the arithmetic and control unit reads road information that intersects with an intersection in the traveling direction of the vehicle from the map data unit and crosses the intersection displayed on the display unit. Since the road display state in the vehicle entry prohibition direction on the specified road is displayed differently from the other road indications, the entry prohibition information can be known before the vehicle reaches the intersection.

Further, as shown in the embodiment, the arithmetic and control unit reads the road information intersecting with the intersection in the traveling direction of the vehicle from the road information beacon grounded along the road or the map. A vehicle in the road crossing the intersection based on a signal from a turn signal switch when the road information intersecting the intersection in the traveling direction of the vehicle is read from the data device and the vehicle approaches the intersection for a predetermined distance. When it is a signal indicating a prohibited approach direction, if the warning means is operated to notify the occupant of the prohibited approach, if the traveling direction is prohibited, it is known that the approach is prohibited immediately after the traveling direction is determined. be able to.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a control circuit of a vehicle navigation display system according to the present invention.

FIG. 2 is an explanatory diagram of an automobile including the control circuit shown in FIG.

FIG. 3 is a front view of the display device shown in FIG.

FIG. 4 is an explanatory diagram of the vehicle navigation display system of FIGS.

5 is an explanatory diagram showing another example of map display on the display device of FIG. 3. FIG.

FIG. 6 is an explanatory diagram showing a partial display example of the map display in FIG.

FIG. 7 is an explanatory diagram showing a partial display example of the map display in FIG.

[Explanation of symbols]

 1 ... Car (vehicle) 5 ... CD deck (map data device) 6 ... Geomagnetic sensor (direction sensor) 7 ... Gyroscope (angular velocity sensor) 9 ... Beacon receiver 13 ... GPS receiver 15 ... Navigation device body 18 ... Wheel speed Sensor 20 ... Turn signal switch 21 ... Warning device (warning means) S1 ... Intersection a, b, c, d, e, f ... Road

Claims (1)

[Claims] 1. The arithmetic control unit reads the map information of the map data unit and displays it on a display unit, and the arithmetic control unit obtains the position and traveling direction of the vehicle based on the information from the position detecting means. In the vehicular navigation display system adapted to be displayed on the map information displayed on the display device, the arithmetic and control unit reads road information intersecting at an intersection in the traveling direction of the vehicle from the map data unit,
A navigation display system for a vehicle, wherein a road display state in a vehicle-entry-prohibited direction on a road intersecting the intersection displayed on the display device is displayed differently from other road displays.