JPH085393A - Current position display device for vehicle - Google Patents

Abstract

PURPOSE:To widely display the other area by displaying the map of the area including a vehicle's current position on the part of a screen, setting the map of the area in contact with it on the other part in the same reduced scale of its boundary direction, and displaying it by increasing the reduced scale of the direction perpendicular to the boundary. CONSTITUTION:A display ECU is split on a screen by a predetermined ratio in upper and lower directions according to a switching command to the scale change display mode of an operating unit. The map of the area A including the current position P of a predetermined reduced scale which can be grasped in detail for a road state is displayed on the lower side part, and the area B where the vertical reduced scale ratio is increased so as to include a destination O on the upper part of the screen by the same horizontal reduced scale ratio as that of the same area as the area A is displayed on the upper side part. Thus, the road state of the advancing direction can be widely looked down while grasping the road state near the position P, and the vehicle can be traveled while selecting the road.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle current position display device for determining the current position of a vehicle on a road map and displaying the current position of the vehicle on the road map displayed on a screen.

[0002]

2. Description of the Related Art Generally, a vehicle current position display device of this type finds out the current position of a vehicle on a map based on a position measured by a position measuring means such as GPS and uses a direction sensor. Obtaining the traveling direction of the own vehicle, and as shown in FIG. 2, display the respective marks of the current position P of the own vehicle and the traveling direction D of the own vehicle at the current position on the road map displayed on the screen. , It is possible to guide the driver to the destination in the non-guide area.

In such a vehicle current position display device, for example, as shown in FIG. 2, a destination O is remote and a wide range of roads including the current position P of the vehicle to the destination O. In order to display the map on the screen, the scale of the map must be increased.

However, if a large-scale road map is displayed on a screen that is not so large as a vehicle-mounted type,
The road network becomes confused and the road to turn cannot be identified.

Therefore, conventionally, when the road network is congested and the road to be bent cannot be discriminated, the map near the current position can be partially enlarged and displayed. However, in the partial enlarged display of the map near the current position, the connection state of the road to the destination O is unknown.

Further, conventionally, when displaying the present position of the vehicle on the road map displayed on the screen, the X axis or Y of the map is expanded according to the traveling direction in order to expand the display area of the map in the traveling direction of the vehicle. Only one of the scales in the axial direction is increased (Japanese Patent Publication No. 6-256).
70 publication). However, if such a map display means is adopted, the map will be significantly deformed.

[0007]

The problem to be solved is that if a wide map looking through the other side is displayed on the screen at a large scale, the road network becomes confused, making it difficult to understand the details. If the map is partially enlarged as necessary to see the details near the current position, the connection state with the road ahead may not be known.

Further, if the scale of either the X-axis or the Y-axis of the map is increased according to the traveling direction of the own vehicle so as to widen the display area in the traveling direction, the map will be deformed. This is extremely uncomfortable and makes it impossible to correspond to the actual road near the current position.

[0009]

DISCLOSURE OF THE INVENTION The present invention is a vehicle current position display device for displaying a map near the current position at a scale such that the details of road conditions can be made clear without any deformation. In addition, the map of the area including the current position of the vehicle can be displayed on a part of the screen with a predetermined scale so that the map of the destination area can be widely displayed while maintaining the connection with the road near the current position. On the display means and the other part of the screen, the map of the area in contact with the area including the current position of the vehicle is set to have the same scale in the boundary direction as the predetermined scale, and in the direction orthogonal to the boundary direction. A means for displaying the reduced scale larger than the predetermined reduced scale is provided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a vehicle current position display device according to the present invention includes a distance sensor 1 for detecting a traveling distance of a vehicle, a direction sensor 2 for detecting a traveling direction of the vehicle, and a detected traveling distance. A calculation that cumulatively obtains the current position on the XY coordinates for each unit traveling distance of the vehicle from the starting point by a predetermined calculation process from the change in the distance and the traveling direction, and sequentially calculates the current position on the road map. ECU 3 for processing
And a map information storage medium 4 composed of a CD-ROM in which road map information digitized in advance is stored, and a storage medium reproduction for selectively reading out road map information in a predetermined area from the map information storage medium 4. The device 5, the display device 6, and the road map of the predetermined area based on the map information read from the map information storage medium 4 are displayed on the screen of the display device 6, and on the road map displayed on the screen, A display ECU 7 that updates the current position of the vehicle and the traveling direction of the vehicle at the current position as the vehicle travels, and an operation command to the display ECU 7, and a map to be displayed on the display device 6 Various indications such as designation, setting the starting point and destination of the vehicle on the displayed map, setting of map display scale factor, display mode switching, etc. It is constituted by an operating device 8 which is capable of appropriately change the setting of the state.

Further, in this vehicle current position display device,
Under the control of the display ECU 7, the mark of the current position P of the vehicle is fixedly displayed at a predetermined position on the screen of the display device 6, and the map is scrolled in the traveling direction as the vehicle travels. Has become.

When obtaining the current position of the vehicle,
It is possible to take various other position measuring means such as finding out the current position on the road map according to the position measured by the GPS receiver.

In such a configuration, as a standard display mode, for example, as shown in FIG. 2, a road map of a predetermined area is displayed on the screen of the display device 6 at a predetermined scale ratio, and A mark indicating the current position P of the vehicle and the traveling direction D of the vehicle at the current position is updated on the road map in accordance with the running state of the vehicle.

According to the present invention, in such a vehicle current position display device, in particular, in the display ECU 7, in response to a switching command from the operation device 8 to the variable power display mode,
A means for displaying a map of the area including the current position of the vehicle on a part of the screen at a predetermined scale, and a map of the area in contact with the area including the current position of the vehicle on the other part of the screen.
The scale of the boundary direction in contact with the boundary is the same as the predetermined scale, and the scale of the direction orthogonal to the boundary is displayed larger than the predetermined scale.

Specifically, for example, as shown in FIG. 3A, when displaying a wide road map from the current position P of the vehicle to the destination O on the screen, the scale factor at that time is displayed. When it is switched to the variable magnification display mode when the road network is large and congested, as shown in FIG. 3 (b),
The screen was vertically divided into two parts at a predetermined ratio such as 6: 4 or 7: 3, and expanded to the bottom of the screen to the extent that the details of road conditions could be clearly understood. A map of the area A including the current position P of the own vehicle is displayed, and the scale factor in the X-axis direction is the same as the map of the area A, and the destination O is displayed in the upper part of the screen. Area B until reaching the destination O in which the Y-axis direction is appropriately reduced
Is displayed.

[0016] As the display scale factor S _A map of the region A including the current position P of the vehicle is set to an arbitrary scale factor by an input operation from the operation device 8. Alternatively, an optimum display scale ratio according to the congestion degree of the road network in each area is set and registered in advance in the map information storage medium 4,
Under the control of the display ECU 7, the optimum display scale ratio of the area where the current position P is present is read out and the display scale ratio SA of the map of the area _A is automatically set.

Further, when the display scale factor S _A map of the region A including the current position P is determined, the display ECU 7, as shown in FIG. 3 (a), the area A corresponding to the display scale factor A region B having the same width as the X-axis direction is determined. At this time, for example, as shown in FIG. 4, when the destination O does not exist in the determined area B, the display ECU is displayed.
In 7, the rotation processing of the road map projected on the screen is performed with the current position P as the center so that the destination O enters the area B.

As the scale factor S _By in the Y-axis direction of the map of the area B displayed on the screen, the current position P and the destination O are displayed in the display ECU 7 according to the scale factor of the display state of FIG. And the actual distance ΔY in the Y-axis direction is calculated, and S _By = L based on the effective display length L _By y in the Y-axis direction in the upper part of the screen divided into two.
It is obtained by performing an operation of _By / ΔY. The scale factor of the map of area B in the X-axis direction is
It is determined to be the same as the display scale factor S _A of.

If the display scale factor S _A of the area _A is determined when switching to the variable magnification display mode, the display ECU 7 determines the current position P according to the display scale factor S _A.
It is checked whether or not the map from the destination to the destination O can be displayed on the screen. When it is determined that the map can be displayed, the map from the current position P to the destination O is uniformly displayed on the screen at the same scale S _A in both the X-axis and Y-axis directions. When it is determined that the screen cannot be displayed, the variable-magnification display of the map of the area A and the map of the area B divided into two is executed.

As the check, for example, Y on the screen is displayed.
When the effective display length in the axial direction is Ly, ΔY × S _A ≦ L
If the condition of y × 0.8 is satisfied, it is determined that the image can be displayed, and if the condition is not satisfied, it is determined that the image cannot be displayed. Here, the Y-axis between the current position P and the destination O is set so that the current position P and the destination O can be displayed with a margin, instead of displaying the current position P and the destination O at the upper and lower limits of the screen. The allowable display length in the direction is Ly × 0.8.

FIG. 5 shows a flow of processing at the time of switching to the variable magnification display mode described above.

As described above, according to the present invention, the map of the area A including the current position P is not deformed by displaying the map in which the screen is divided into two, and the detail of the road condition is displayed. Can be enlarged and displayed at a reduced scale that makes it clear, and the map of the destination area B up to the destination O can be reduced to a wide area while maintaining the connection state with the road in the area A. Can be displayed.

Therefore, the optimum route from the current position P to the destination O is flexibly selected, and the route to be turned is accurately grasped while corresponding to the actual road near the current position P. Will be able to.

Further, according to the present invention, even when the destination O is not set as described above, the map of the area A including the current position P can be similarly transformed without any deformation.
The map is enlarged and displayed at a reduced scale so that the details of the road condition are clear, and the map of the region B ′ in the traveling direction of the vehicle is reduced and widely displayed while maintaining the connection state with the road in the region A. It is possible to allow it.

In this case, for example, the display ECU 7 performs the rotation processing of the map displayed on the screen so that the traveling direction of the vehicle is always the Y-axis direction, and then the area including the current position of the vehicle. A is enlarged at a predetermined scale and displayed in the lower part of the screen divided into two. And
The map of the area B ′ in the traveling direction which is in contact with the area A in the Y-axis direction is set so that the scale factor in the X-axis direction is the same as the scale factor in the area A, and the scale factor in the Y-axis direction is the area. Input is set to be larger than that of A, and is displayed in the upper part of the screen.

Therefore, according to the present invention, by adopting such display means, while clearly grasping the details of the road condition in the vicinity of the current position P, the road condition of the other vehicle in the traveling direction of the vehicle can be widely understood. It is effective when driving while selecting a road.

In the above embodiment, the screen is divided into two parts in the Y-axis direction to display the scale change of the road map. However, the screen is divided into two parts in the X-axis direction to change the scale of the road map. It is also possible to easily display.

[0028]

As described above, in the vehicle current position display device according to the present invention, the map of the area including the current position of the vehicle is displayed on a part of the screen at a predetermined scale, and the vehicle is displayed on the other part of the screen. In order to display the map of the area that touches the area including the current position, the scale of the touching boundary is the same as the predetermined scale and the scale of the direction orthogonal to the boundary is larger than the predetermined scale. The map near the current position is transformed without any deformation.
It has the excellent advantage that it can be displayed at a scale that makes the details of the road condition clear, and that it can widely display the map of the destination area while maintaining the connection state with the road near the current position. There is.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a vehicle current position display device according to the present invention.

FIG. 2 is a diagram showing an example of a display screen in a standard mode in the vehicle current position display device.

FIG. 3 is a diagram showing a correspondence relationship between a display screen in a standard mode and a display screen in a variable magnification display mode.

FIG. 4 is a diagram showing a state in which a destination extends from an area in which a variable-magnification display is performed on a display screen in a standard mode.

FIG. 5 is a diagram showing a flow of processing when switching to a variable magnification display mode.

[Explanation of symbols]

 1 Distance sensor 2 Direction sensor 3 Calculation processing ECU 4 Map information storage medium 5 Storage medium playback device 6 Display device 7 Display ECU 8 Operating device P Current position of own vehicle D Direction of travel of own vehicle O Destination

Claims (3)

[Claims] 1. A current position display device for a vehicle, which displays a current position of a vehicle on a road map and displays the current position of the vehicle on the road map displayed on a screen, wherein a map of an area including the current position of the vehicle is displayed. Means for displaying on a part of the screen at a predetermined scale, and on another part of the screen, a map of a region in contact with the region including the current position of the vehicle, and the scale of the contact boundary direction is the same as the predetermined scale. And a means for displaying by making the scale of the direction orthogonal to the boundary direction larger than the predetermined scale, and displaying the vehicle current position. 2. A preset destination is included in a map of a region that is in contact with a region including the current position of the vehicle, and the destination is set in a direction that is reduced according to the distance between the current position and the destination. The first aspect characterized in that the scale ratio is determined.
A vehicle current position display device according to the item. 3. A map of a region in the traveling direction of the vehicle is displayed as a map of a region in contact with a region including the current position of the vehicle, and the scale factor of the direction in which the map is reduced can be arbitrarily set. The vehicle current position display device according to the above item 1.