JPH08304097A - Display controller and control method - Google Patents

Abstract

PURPOSE: To obtain a display controller and control method of such navigation system as a partial enlarged drawing can be displayed while being superposed on an original map in which reliable guidance of course is realized by enhancing the visibility of enlarged drawing and map. CONSTITUTION: When no road information can be obtained with respect to an entering road, the direction of a passing point PP with respect to the position of its own vehicle at the displaying timing of an enlarged drawing W is set as a reference direction, e.g. upward direction, corresponding to the advancing direction of its own vehicle on the enlarged drawing. The center of display of the map is shifted so that the background map can be viewed easily based on the displaying position of the enlarged drawing W on the screen. Furthermore, enlarged passing point PP is displayed on the map in a mode different from that for other passing point.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display control method and apparatus, and more particularly, to a display control method and apparatus used in a navigation device for guiding a vehicle such as a vehicle to a destination.

[0002]

2. Description of the Related Art Currently, for example, as a positioning device for various moving bodies such as automobiles, aircrafts, ships, etc., the position of the moving body is set at the point on the map including the point where the moving body is currently present. There is known a so-called navigation device that superimposes and displays the indicated position mark and guides a route to a destination based on the superimposed position mark. This navigation device is roughly classified into a self-contained navigation device and a GPS (Glob
al Positioning System) type navigation device.

The former is a direction sensor provided in a moving body,
The moving direction and the moving distance of the moving body are obtained by the speed sensor and the angular velocity sensor, and the current position is calculated by adding them to the reference point. Based on the calculated current position, the position mark and the corresponding map are displayed on the display screen. Is displayed.

The latter receives radio waves from a plurality of GPS satellites launched into outer space and calculates the current position of the moving body by a three-dimensional survey method or a two-dimensional survey method based on the reception result. The position mark and the corresponding map are displayed on the display screen based on the calculated current position.

More recently, navigation devices having both the above-mentioned self-supporting type and GPS type functions are becoming popular. According to the above navigation device, the user can grasp the current position of himself and the map in the vicinity of the current position by associating with him, so that he can reach the destination without hesitation even in the first passing area. can do.

Next, a conventional navigation device will be specifically described with reference to FIGS. 11 to 13 by taking an on-vehicle navigation device for an automobile as an example. Figure 11
FIG. 4 shows an example of a display on a display D such as a liquid crystal display as a display device that constitutes a vehicle-mounted navigation device.

As shown in FIG. 11, in a vehicle-mounted navigation device, a CD-ROM (Compact Disk-Read) is used.
Map data corresponding to the own vehicle position is read from the map data stored in (Only Memory) and the like, and a map M corresponding to the read map data and a own vehicle position mark C corresponding to the own vehicle position. Are superimposed and displayed on the display D. At that time, in addition to the road R shown in FIG. 11, the positions of well-known features included in the display range of the map M are displayed along with their names, and further, as shown in FIG. The planned route PR to the destination is another road R
It is displayed in a different display method from. At this time, the route PR
On the top, the main waypoints P are displayed together with the numbers indicating the order of waypoints.

Further, as another function of the conventional navigation device, as shown in FIG. 11, on the map M on which the own vehicle position mark C is displayed, the nearest waypoint (hereinafter, referred to as the following way point) where the own vehicle should pass (hereinafter, Enlarged view W near the target waypoint PP.)
Some have a function of displaying as.

The display of the enlarged view W will be specifically described below with reference to FIGS. 12 and 13. First, as an assumption for explanation, as shown in FIG. 12 (a), the own vehicle is present at the position of the own vehicle position mark C, and in the future, turn left at the target waypoint PP and go through the route PR. Via point P ₁
Suppose that you plan to drive to reach.

Here, in the navigation device having the function of displaying the enlarged view W, the road data for the enlarged view is stored as vector data separately from the image data for displaying the map M (see FIG. 11). Has been done.
Each vector data is divided into a plurality of nodes (relay points) and inter-node roads corresponding to the actual roads and stored in a CD-ROM or the like. In the example shown in FIG. 12, the road shown in FIG. 12A is divided into nodes n _{0 to} n ₈ and inter-node roads r _{0 to} r ₉ shown in FIG. 12B. At this time, the node and the waypoint (intersection) do not necessarily coincide with each other, and in general, the internode distance is shorter than the internode distance.

Now, in the case shown in FIG. 12, when the enlarged view W (see FIG. 11) is displayed for the target waypoint PP, there is an inflow (entry) to the target waypoint PP from the CPU constituting the navigation device. The inter-node road for r ₀ ,
An instruction to enlarge and display the vicinity of the target waypoint PP is issued with the inter-node road for outflow (departure) from the target waypoint PP as r ₆ , and based on this, the enlarged view W shown in FIG. It is displayed on the display screen displaying the map M (Fig. 1
1). At this time, the road R corresponding to the route PR is displayed in a display state (for example, changing color) different from that of the other roads R. Also, the direction on the map (north,
Regardless of the south), the inflow route to the target waypoint PP (Fig. 12)
In the case of, the direction of the inter-node road r ₀ ) is set as the reference direction in the enlarged view W (upward in the case of FIG. 13). Further, roads R other than the route PR are displayed in a color different from the background of the map M based on the road data stored in the CD-ROM, and roads having different widths have, for example, two types of widths. Is displayed.

Further, along with the movement of the vehicle, the vehicle position mark C in the map M and the vehicle position mark C in the enlarged view W also move. According to the navigation device having the function of displaying the enlarged view W, the map near the target waypoint PP can be enlarged and displayed together with the vehicle position mark C and the route PR, so that the road near the target waypoint PP can be displayed. It is possible to grasp the situation (such as branch situation, which road to enter, etc.) in advance.

[0013]

However, in the conventional navigation device having the function of displaying the enlarged view W, there are the following various problems in display.

That is, the first problem is that when displaying the enlarged view W, for example, when the start point of the route PR is enlarged as the target waypoint PP, the inflow route information cannot be acquired (does not exist). ) There are cases. In this case, when enlarging the display, it is not possible to determine which direction should be the reference direction for the enlarged display in the enlarged view. There is a problem in that an unnatural enlarged display such as a direction is displayed.

As a second problem, as shown in FIG. 11, when the enlarged view W is displayed by being superimposed on the map M, the previously displayed map M may be difficult to see. That is, for example, by displaying the enlarged view W, an important feature on the map M is hidden, or by displaying the enlarged view W near the vehicle position mark C, the situation near the vehicle position can be improved. There is a problem that it is difficult to grasp, and in the worst case, the vehicle position C may be hidden and the vehicle position may not be recognized.

Further, as a third problem, when a plurality of adjacent waypoints P are displayed on the map M together with a number indicating the order of way, which waypoint P is the target waypoint PP.
However, there is a problem that it becomes difficult to immediately recognize whether or not the display is enlarged. That is, when a plurality of waypoints P are displayed in close proximity on the map M, it may be difficult to immediately recognize which waypoint P is enlarged and displayed.

Therefore, the present invention has been made in view of the above problems, and the object thereof is to display a partially enlarged view by superimposing it on the original map. It is an object of the present invention to provide a display control method and device for a navigation device, which can improve visibility of the enlarged view and the map, prevent erroneous recognition, and reliably guide a route.

[0018]

In order to solve the above-mentioned first problem, the invention according to claim 1 corresponds to a preset route and one's vehicle position including one or a plurality of waypoints. A display device that simultaneously displays a map displaying a vehicle position mark and an enlarged view enlarging a predetermined range on the map that includes at least a target waypoint which is the waypoint closest to the vehicle position and should be passed from now on In the display control method displayed on
A detecting step of detecting the direction of the target waypoint with respect to the own vehicle position at a predetermined timing, and the detected direction is a reference direction corresponding to the traveling direction of the own vehicle such as an upward direction in the display of the enlarged view. And a display control step of controlling the display of the enlarged view.

In order to solve the second problem, claim 2
The invention described in (1) is a map in which a vehicle position mark corresponding to a preset route including one or more waypoints and the vehicle position is displayed, and the route which is closest to the vehicle position and which should be passed in the future. In a display control method for simultaneously displaying on a display device an enlarged view enlarging a predetermined range on the map including at least a target waypoint that is a point, based on the display position of the enlarged view on the display screen of the display device, On the display screen, a display center point, which should be the center of display on the map when the map is displayed, is displayed on the display screen at a portion to be displayed on the map with respect to the display position of the enlarged view. It is configured to include a movement display step of moving in the direction and displaying the map.

Further, in order to solve the second problem, the invention according to claim 3 is the display control method according to claim 2, wherein in the moving display step, the display of the own vehicle position mark is performed. While displaying the map so that the position is not included in the display range in which the enlarged view is displayed on the display screen of the display device, with respect to the display position of the vehicle position mark on the map, The map is displayed by moving the display center point in a direction in which there is a route to be passed in the future.

In order to solve the third problem, claim 4
The invention described in (1) is a map in which a vehicle position mark corresponding to a preset route including one or more waypoints and the vehicle position is displayed, and the route which is closest to the vehicle position and which should be passed in the future. A display control method for simultaneously displaying, on a display device, an enlarged view enlarging a predetermined range on the map including at least a target waypoint which is a point, which corresponds to the target waypoint among the waypoints in the route. A display for displaying the corresponding waypoint by making a determination step of determining the corresponding waypoint which is the waypoint and a display mode of the determined corresponding waypoint on the map different from the display mode of the other waypoints. And a control step.

In order to solve the first problem, according to the invention of claim 5, a vehicle position mark corresponding to a preset route including one or a plurality of waypoints and the vehicle position is provided. A display control device that simultaneously displays, on a display device, the displayed map and an enlarged view enlarging a predetermined range on the map that includes at least a target waypoint that is the waypoint that should be passed closest to the vehicle position in the future. In, a detection means such as a CPU for detecting the direction of the target waypoint with respect to the own vehicle position at a predetermined timing, and the detected direction becomes a reference direction corresponding to the traveling direction of the own vehicle in the display of the enlarged view. As described above, the display control means such as a CPU for controlling the display of the enlarged view is provided.

In order to solve the second problem, claim 6
The invention described in (1) is a map in which a vehicle position mark corresponding to a preset route including one or more waypoints and the vehicle position is displayed, and the route which is closest to the vehicle position and which should be passed in the future. In a display control device for simultaneously displaying on a display device an enlarged view enlarging a predetermined range on the map including at least a target waypoint that is a point, based on the display position of the enlarged view on the display screen of the display device, On the display screen, a display center point, which should be the center of display on the map when the map is displayed, is displayed on the display screen at a portion to be displayed on the map with respect to the display position of the enlarged view. It is configured to include movement display means such as a CPU that moves in the direction and displays the map.

Further, in order to solve the second problem, the invention according to claim 7 is the display control device according to claim 6, wherein the moving display means displays the vehicle position mark. Position The route is displayed on the display screen of the display device so that the map is not included in the display range in which the enlarged view is displayed, and the route is displayed with respect to the display position of the vehicle position mark on the map. It is configured to display the map by moving the display center point in a direction in which a route to be passed in the future exists.

In order to solve the third problem, claim 8
The invention described in (1) is a map in which a vehicle position mark corresponding to a preset route including one or more waypoints and the vehicle position is displayed, and the route which is closest to the vehicle position and which should be passed in the future. A display control device that simultaneously displays, on a display device, an enlarged view of a predetermined range on the map that includes at least a target waypoint that is a point, and corresponds to the target waypoint among the waypoints in the route. A determination means such as a CPU for determining a corresponding waypoint which is the waypoint, and a display mode of the determined corresponding waypoint on the map,
And a display control unit such as a CPU that displays the corresponding waypoint in a manner different from that of the other waypoints.

[0026]

According to the first aspect of the invention, in the detecting step, the direction of the target waypoint corresponding to the vehicle position is detected at a predetermined timing.

Then, in the display control step, the display of the enlarged view is controlled so that the detected direction is the reference direction corresponding to the traveling direction of the own vehicle in the display of the enlarged view. Therefore, since the direction is the reference direction (for example, the upper direction) corresponding to the traveling direction of the vehicle, it is possible to align the planned traveling direction of the vehicle with the reference direction of the enlarged view.

According to the invention described in claim 2, in the moving display step, the display center point is set to the display position of the enlarged view on the display screen based on the display position of the enlarged view on the display screen of the display device. Then, the map is displayed by moving in the direction in which the portion to be displayed on the map is displayed.

Therefore, by displaying the map and the enlarged view at the same time, it is possible to prevent the portion to be displayed on the map from being hidden by the enlarged view and not being displayed. According to the invention of claim 3, in addition to the effect of the invention of claim 2, in the moving display step, an enlarged view of the display position of the vehicle position mark is displayed on the display screen of the display device. The map is displayed so that it is not included in the display range, and the map center is moved by moving the display center point in the direction in which there is a route to be passed from the display position of the vehicle position mark on the map. indicate.

Therefore, when the map and the enlarged view are displayed at the same time, it is possible to prevent the vehicle position mark from becoming invisible due to the enlarged view, and a wider range of future routes to be displayed is displayed.

According to the invention described in claim 4, in the determining step, the corresponding waypoint included in the waypoints in the route is determined. Then, in the display control step, the corresponding waypoint is displayed by making the display mode of the determined corresponding waypoint on the map different from the display mode of other waypoints.

Therefore, even when there are a plurality of waypoints on the map, the user can easily grasp which waypoint vicinity is enlarged and displayed. According to the invention described in claim 5, the detecting means detects the direction of the target waypoint with respect to the own vehicle position at a predetermined timing, and outputs it to the display control means.

Then, the display control means controls the display of the enlarged view so that the detected direction is the reference direction corresponding to the traveling direction of the own vehicle in the display of the enlarged view. Therefore,
Since the direction is the reference direction (for example, the upper direction) corresponding to the traveling direction of the vehicle, it is possible to match the planned traveling direction of the vehicle with the reference direction of the enlarged view.

According to the invention described in claim 6, the moving display means sets the display center point to the display position of the enlarged view on the display screen based on the display position of the enlarged view on the display screen of the display device. Then, the map is displayed by moving in the direction in which the portion to be displayed on the map is displayed.

Therefore, by displaying the map and the enlarged view at the same time, it is possible to prevent the portion to be displayed on the map from being hidden by the enlarged view and not being displayed. According to the invention of claim 7, in addition to the effect of the invention of claim 6, the moving display means displays an enlarged view of the display position of the vehicle position mark on the display screen of the display device. While displaying the map so that it is not included in the display range, with respect to the display position of the vehicle position mark on the map,
The map is displayed by moving the display center point in the direction in which there is a route to be passed in the future.

Therefore, when the map and the enlarged view are displayed at the same time, it is possible to prevent the vehicle position mark from becoming invisible due to the enlarged view, and a wider range of future routes to be displayed is displayed.

According to the invention described in claim 8, the discrimination means discriminates a corresponding waypoint included in the waypoints in the route, and outputs the discrimination result to the display control means. Then, the display control means displays the corresponding waypoint by making the display mode of the determined corresponding waypoint on the map different from the display mode of other waypoints.

Therefore, even when there are a plurality of waypoints on the map, the user can easily grasp which waypoint vicinity is enlarged and displayed.

[0039]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be described with reference to the drawings. In addition, in the following embodiments, the case where the present invention is applied to a vehicle-mounted navigation device in an automobile or the like will be described. (I) Device Configuration First, the overall configuration of the navigation device of this embodiment will be described with reference to FIG.

Navigation device S according to the embodiment
Is a geomagnetic sensor 1 that outputs direction data in the traveling direction of the vehicle, an angular velocity sensor 2 that detects angular velocity when the vehicle is rotating, and outputs angular velocity data, and a rotational speed of a drive shaft connected to wheels. A mileage sensor 3 that outputs mileage data by detecting and integrating, and a GP that receives radio waves from GPS satellites and outputs GPS positioning data.
An S receiver 4, a system controller 5 that controls the entire navigation device based on azimuth data, angular velocity data, mileage data, and GPS positioning data, and an input device 11 such as a remote control device for inputting various data. , CD-R under the control of the system controller 5
A CD-ROM drive 12 that reads and outputs various data such as road data from the OM disk DK, a display unit 13 that displays various display data under the control of the system controller 5, and various types under the control of the system controller 5. And a sound reproducing unit 18 for reproducing and outputting audio data.

The system controller 5 also stores an interface section 6 for interfacing with an external sensor such as the geomagnetic sensor 1, a CPU 7 for controlling the entire system controller 5, a control program for controlling the system controller 5, and the like. ROM (Read Onl
y Memory) 8 and a non-volatile memory (not shown),
RAM (Random Acces
s Memory) 9 and an input device 11, CD-R
The OM drive 12, the display unit 13, and the sound reproduction unit 18 are connected via the bus line 10.

Further, the display unit 13 includes the bus line 1
A graphic controller 14 that controls the entire display unit 13 based on control data sent from the CPU 7 via 0 and a memory such as VRAM (Video RAM), and temporarily stores image information that can be immediately displayed. Based on the image data output from the buffer memory 15 and the graphic controller 14, liquid crystal, CRT (Ca
display 1 as a display means such as thode Ray Tube)
And a display control unit 16 that controls the display of the display 7.

The sound reproduction unit 18 is a D / A for performing D / A conversion of audio digital data sent from the CD-ROM drive 12 or the RAM 9 via the bus line 10.
It includes a converter 19, an amplifier 20 that amplifies a voice analog signal output from the D / A converter 19, and a speaker 21 that converts the amplified voice analog signal into voice and outputs the voice.

In this case, the above-mentioned road data, node data, etc. are previously stored in the CD-ROM disc D.
The CPU 7 stored in K and further included in the system controller 5 functions as a detection unit, a display control unit, a movement display unit, and a determination unit. (II) Description of Overall Operation in Display of Enlarged View Next, the display operation of the enlarged view in the navigation device S of the embodiment will be described based on the flowchart shown in FIG. Note that the flowchart shown in FIG. 2 is premised on a state where route guidance is being executed while displaying only the normal map M without displaying the enlarged view W, and the operation shown in the flowchart of FIG. It is executed by the CPU 7 based on the program stored in the ROM 8.

Further, in the following description, FIG. 11 and FIG.
In the case of (the target waypoint PP is passed to the next waypoint P ₁
The case of enlarging and displaying the vicinity of the target waypoint PP will be described as an example.

First, the positional relationship (distance) with the target waypoint PP is determined based on the vehicle position calculated based on the data from various sensors such as the geomagnetic sensor 1 (steps S1 and S2). In the processing in steps S1 and S2, the distance between the vehicle position and the target waypoint PP is constantly monitored, and it is determined whether or not the distance has reached a preset predetermined distance. When the predetermined distance is not reached (step S2; NO), the normal route guidance is continued by displaying the map M as it is, and when the predetermined distance is reached (step S2; YES), the next Control goes to step S3.

In step S3, the intersection data regarding the target waypoint PP is acquired from the RAM 9.
The intersection data includes the intersection data number, the inflow road number, the outflow road number, etc. (target waypoint PP).
Data is included. It should be noted that instead of the inflow road number and the outflow road number, data about the inflow angle and the outflow angle with respect to the intersection may be included.

Next, in step S4, it is judged whether or not the intersection data on the target waypoint PP can be acquired. If the intersection data cannot be acquired (step S4; NO), it is determined that the target waypoint PP is not an intersection, and the data is left as it is. If the normal route guidance is continued by displaying the map M and there is intersection data (step S4; YES),
Next, the road data including the intersection, that is, the target waypoint PP is read from the CD-ROM disc DK, and stored in the RAM.
9 is once loaded (step S5).

Next, in step S6, the rotation angle θ of the entire map within the range included in the enlarged view W when the enlarged view W is displayed is determined. The detailed operation in step S6 will be described later. The process of step S6 is an enlarged view W
This is a process of determining which direction in the map is to be displayed as the top (that is, as the reference direction in the display of the enlarged view W).

In step S6, when the rotation angle θ of the map in the enlarged view W is determined, the one road point (for example, node n ₀ ) to be displayed as the enlarged view W from the CD-ROM disk DK is next determined. Road information is read (step S7). This road information includes absolute coordinates (latitude and longitude) of each node (see FIG. 12) included in the road to be drawn, width, road type, and the like.

Next, in step S8, the obtained road coordinates (absolute coordinates of each node) are converted into relative coordinates centering on the target via point PP to be enlarged, and the rotation angle θ is added to this. Then, the coordinates of the position of each road (node) to be drawn are calculated.

Then, the coordinates are calculated in step S8.
Node (in this case node n ₀) Satisfies the end condition
It is determined whether or not it is being played. This termination condition is
The node n₀The display position of the
Whether or not it is exceeded, and re-focusing on the target waypoint PP
Whether the number of links (the number of connections with other nodes) has been exceeded, etc.
Is judged. And if the end condition is not met,
(Step S9; NO) Next, as seen from the target waypoint PP
Node n₀Next node on the same road as
, Then node n₁), The operation of step S8 is performed.
The process returns to step S8 in order to proceed. This loop goes through the goal
All nodes contained in one road centered on the point PP
Processing of step S8 and step S9 ends
Repeat until

Next, in step S10, all the roads centering on the target waypoint PP are subjected to the above step S10.
It is determined whether the processing from 7 to step S9 has been executed. If not executed for all roads (step S10; NO), the process returns to step S7 to execute the processes of steps S7 to S9 for the roads not executed. This loop is repeated until the processing of steps S7 to S9 is completed for all the roads centering on the target waypoint PP. Then, when the processing of steps S7 to S9 is completed for all the roads centering on the target waypoint PP (step S10; YES), the display center point of the map M (see FIG. 11) is enlarged in the enlarged view W. The process of step S11 is executed to shift (move) based on the display position.
Details of the process of step S11 will be described later.

In step S11, when the display center point of the map M is moved, next, if there are a plurality of waypoints P in the map M, the waypoint P to be enlarged and displayed as the target waypoint PP is selected. , The processing of step S12 is executed so as to be displayed on the map M in distinction from the other waypoints P. Details of the processing in step S12 will be described later.

In step S12, the target waypoint PP
When the processing for distinguishing and displaying the waypoint P to be enlarged and displayed as another waypoint P is completed, the process proceeds to the process of actually drawing the enlarged view W (steps S13 to S20). To do.

First, in step S13, an enlarged view W
The road to be drawn as
Inflow road (internode road r in FIG. 12B)₀Over
And r ₁Is equivalent to ) Or the outflow road (See Figure 12 (b))
Road between nodes r₆And r ₇Is equivalent to ) Or not
To be judged. And if it is an inflow road or an outflow road
(Step S13; YES), inflow road or outflow road
The process of step S13 is performed until a road that is not a road is searched.
Repeatedly, if it is not the inflow road or the outflow road (step
S13; NO), then the road acquired in step S7
The color, thickness, etc. of the road to be drawn is determined based on the information
After being processed (step S14), as an enlarged view W,
The road is drawn (step S15). Where
The processing in step S13 is performed on the inflow road and the outflow road.
This is the process performed for the final drawing.

Further, in the road drawing process in step S15, if the length of the inter-node road corresponding to the road to be drawn exceeds the range to be enlarged and displayed, regardless of the length of the inter-node road. Instead, the drawing of the road is discontinued on the boundary of the enlarged range.

Further, when the length of the inter-node road corresponding to the road to be drawn does not reach the boundary of the enlarged display range, the road is concerned regardless of the length of the inter-node road. The road is extended in the direction of and the drawing of the road ends when the boundary of the expansion range is reached.

Next, based on the road information, it is judged whether or not there is road regulation (prohibition of entry, etc.) for the road drawn in step S15 (step S1).
6). Here, if there is road regulation for the road (step S16; YES), a mark indicating that is drawn on the road (step S17) (FIG. 4).
(See the no-entry mark N in). If there is no road regulation (step S16; NO), it is determined that the drawing of the road is completed, and the process proceeds to step S18.

Next, in step S18, it is judged whether or not the drawing of the inflow road is completed in the enlarged view W, and if the drawing of the inflow road is not completed (step S18; NO), Next, it is judged whether or not the drawing of the outflow road is completed in the enlarged view W (step S1).
9). Then, when the drawing of the outflow road is not completed (step S19; NO), it is next determined whether or not all the roads other than the inflow road or the outflow road are drawn in the enlarged view W (step S19). S20) If the drawing is not completed (step S20; NO), the process returns to step S13 to draw a road other than the inflow road or the outflow road for which the drawing is not completed. This loop is repeated until drawing of all roads other than the inflow road or the outflow road is completed.

When the drawing of all roads other than the inflow road or the outflow road is completed (step S20; YES),
Next, in order to draw the inflow road, the process returns to step S14 and the inflow road is drawn (steps S14 to S1).
8). When the drawing of the inflow road is completed (step S18; YES), the flow returns to step S14 to draw the outflow road next. When the drawing of the outflow road is completed (step S19; YES), the drawing process of all the enlarged views W is completed.

Regarding the drawing of the own vehicle position mark C in the enlarged view W, when the own vehicle does not reach within the range on the enlarged map M, the own vehicle position is shown in the enlarged view W. The mark C is not displayed, and after the vehicle reaches the enlarged range, the vehicle position mark C corresponding to the vehicle position is an enlarged view W.
Is displayed inside. Further, the vehicle position mark C in the enlarged view W moves as the vehicle moves. (III) Processing for Determining Rotation Angle θ of Entire Enlarged View W Next, the enlarged view W corresponding to the inventions according to claims 1 and 5
An example of the process of determining the entire rotation angle θ (see step S6 in FIG. 2) will be described with reference to FIGS. 3 and 4.

In the process of determining the rotation angle θ in step S6, it is first determined whether or not there is road information about the inflow road (step S30). Then, when there is road information of the inflow road (step S30; YE
S), referring to the road data of the inflow road, the target waypoint PP
The direction of the target waypoint PP viewed from the node included in the immediately preceding link is designated as the inflow azimuth (step S32). Then, in step S33, the drawing direction is determined so that the inflow direction specified in step S32 is the upward direction (reference direction corresponding to the traveling direction of the vehicle) in the enlarged view W, and the rotation angle θ is determined based on this. .

If there is no road information of the inflow road in step S30 (step S30; NO),
The target waypoint P viewed from the vehicle position in step S31
The direction of P is detected and the direction is designated as the inflow direction,
The process proceeds to step S33 to determine the rotation angle θ.

FIG. 4 shows the result of drawing the enlarged view W by executing the processing of step S31. As shown in FIG. 4, when there is no information about the inflow road for the target waypoint PP, the target waypoint PP viewed from the vehicle position at the enlarged display timing (the timing at which the enlarged view W is first displayed) is displayed. The direction (indicated by an arrow in FIG. 4) is the upward direction in the display of the enlarged view W. In the embodiment shown in FIG. 2, even after the enlarged view W is once displayed, the drawing direction in the enlarged view is updated even if the direction of the target waypoint PP seen from the own vehicle position changes due to the progress of the own vehicle. It is not done, but the target waypoint PP seen from the position of the vehicle as the vehicle advances
It is also possible to rotate the enlarged view W along with the change of the direction of so that the direction of the target waypoint PP viewed from the vehicle position is always the upward direction in the enlarged view W. (IV) Display Center Point Moving Process Next, the display center point moving process (see step S11 in FIG. 2) of the map M corresponding to the invention described in claims 2, 3, 6 and 7 will be described with reference to FIGS. Will be explained. In addition,
The process shown in FIGS. 5 and 6 is based on the assumption that the enlarged view W is displayed in the lower right part of the display screen (see FIG. 11), and the map M is displayed.
In order to prevent the portion to be displayed above from being hidden by the enlarged view W, a process for moving the map M in the direction in which the portion to be displayed is displayed, that is, to the left on the display screen. Is being done. Further, in the display of the map M, it is assumed that the map M is also rotated and displayed along with the direction change of the own vehicle so that the traveling direction of the own vehicle is always the upward direction.

In the display center point moving process in step S11, as shown in FIG. 5A, first, the coordinates of the display center point of the currently displayed map M are acquired from the RAM 9 (step S41). . Then, it is determined whether the currently displayed map M is displayed with the north on the map or the south on the map (step S42). Here, in the case of north on the map, it is assumed that the range of 90 degrees is included with true north as the center direction (the same applies in steps S42 to S44).

When the map M is displayed with the north on the map facing up or the south with the map facing up (step S42; YES), the map M then moves up the north on the map. It is determined whether or not it has been displayed (step S
43). Then, when the map M is displayed with the north on the map facing up (step S43; YES), the map M is displayed.
Is moved to the left on the display screen, the moving direction of the display center point of the map M is determined to be east on the map (step S).
46) (see FIGS. 5 (c) (i)). This is shown in Fig. 5 (b).
As shown in, in order to move and display the point P ₀ on the screen to the position of the point P ₁ , the display center point of the map is changed from the point C ₀ to the point C ₁
It depends on what you want to move to.

When it is determined in step S43 that the map M is not displayed with the north on the map facing up (step S43; NO), the map M is displayed with the south facing up. In order to move the map M to the left on the display screen, the movement direction of the display center point of the map M is determined to be west on the map, as in step S46 (step S46) (FIG. 5 (c) ( iii))). In addition, in the determination in step S42, when the map M is displayed with the north on the map upward or the south is not displayed on the map (step S42; NO),
Next, it is determined whether or not the map M is displayed with the east side on the map facing up (step S44). And the map M
Is displayed with the east side up on the map (step S44; YES), in order to move the map M to the left on the display screen, the display center point of the map M is moved in the same manner as in step S46. The moving direction of is determined to be south on the map (step S46) (see FIGS. 5 (c) and (iv)).

Further, in the judgment of step S44, if the map M is not displayed with the east side on the map up (step S44; NO), the map M is displayed with the west side up. In order to move the map M leftward on the display screen, the moving direction of the display center point of the map M is determined to be north on the map (step S48), as in step S46 (FIG. 5C). (See (ii)).

After that, steps S45 to S4
In the process of 8, when the moving direction of the display center point is determined, the coordinates of the display center point after the movement are determined based on it. Regarding the movement amount, when the size of the enlarged view W on the display screen is constant, a predetermined fixed amount is moved, and when the size of the enlarged view W is variable, it is adjusted to the size. Then, it is moved by a predetermined amount.

Next, the result when the process of step S11 (steps S41 to S49) is executed and the map M is moved will be described with reference to FIG. Step S
When the processing of 11 is executed, in comparison with the case where the enlarged view W is not displayed (FIG. 6A), in FIG.
The map M is moved by ΔX to the left on the screen and displayed.

In the above description, the enlarged view W
Is displayed on the lower right of the display screen and the movement amount Δx of the display center point of the map M is constant, but the present invention is not limited to this, and the display position on the display screen of the enlarged view W is not limited to this. Correspondingly, the moving direction can be determined so that the route PR to be passed in the future is displayed in a wider range. In this case, steps S45 to S48
When determining the moving direction in, the moving direction is determined so as to move the display center point in the direction in which the route PR exists with respect to the display position of the vehicle position mark C on the map. (V) Target waypoint differentiating display processing Next, with reference to FIG. 7 and FIG. 7, the differentiating display processing of the target waypoint PP on the map M corresponding to the inventions described in claims 4 and 8 (see step S12 in FIG. 2). This will be described with reference to FIG.

In the target waypoint differentiating display processing in step S12, as shown in FIG. 7, first, at the timing of step S2 (see FIG. 2), the target waypoint PP to be enlarged is preset. The number on the route PR (number in order of passage) is acquired from the RAM 9 to the CPU 7 (step S50).

Next, one waypoint P on the route PR (hereinafter,
It is called waypoint P '. ), The position on the map M is collated, and it is determined whether or not the position of the waypoint P ′ is within the range displayed as the map M (step S51). If the position of the waypoint P'is not within the range displayed as the map M (step S51; NO), since the differentiated display cannot be performed, the process directly proceeds to step S55. If the position of the waypoint P'is within the display range of the map M (step S51; YES), then in step S52, the number of the target waypoint PP and the number of the waypoint P'obtained in step S50. Is checked to determine whether or not the via point P ′ is a corresponding via point corresponding to the target via point PP to be expanded. If the waypoint P'does not correspond to the target waypoint PP (step S52; N
O), the waypoint P ′ and its number are drawn in the same predetermined color as the other waypoints without displaying the differentiation (step S
54) and the process proceeds to step S55. Also, the waypoint P '
If is a target waypoint PP (step S5
2; YES), in order to execute the differentiated display, the via point P ′ and its number are drawn in a color different from other via points (step S53), and the process proceeds to step S55.

In the process of step S55, the route P
It is determined whether or not the above steps S51 to S54 have been completed for all the waypoints P on the R,
If the processing has been completed for all the waypoints P (step S55; YES), the process proceeds to step S13 (see FIG. 2), and if the processing has not been completed for all the waypoints P. (Step S55; NO), the unprocessed waypoint P is set as the waypoint P ′, and the process returns to step S51 to execute the processes of steps S51 to S54. This loop is repeated for all the waypoints P on the route PR (step S) until the processes of steps S51 to S54 are completed.

Next, the result when the processing of step S13 (steps S50 to S55) is executed and the target waypoint PP is displayed in a differentiated manner will be described with reference to FIG.

During normal route guidance in which the enlarged view W is not displayed, the target waypoint PP and the other waypoints P are displayed in the same display mode as shown in FIG. 8A. .

When the vehicle advances to the timing of displaying the enlarged view W, the enlarged view W is displayed by the processing described so far as shown in FIG.
The target waypoint PP is displayed in a different color from the other waypoints P, and the target waypoint PP enlarged on the map M can be recognized separately from the other waypoints P.

Here, in the processing shown in FIGS. 7 and 8, another waypoint P is used as a differentiated display of the target waypoint PP.
It was displayed with different colors (step S5
3) The present invention is not limited to this, and another display method, for example, only the target waypoint PP is displayed in a blinking manner,
Alternatively, differentiating display may be performed by a display method in which only the target waypoint PP has a shape (quadrangle or the like) different from the display of the other waypoints P.

In addition to the processes described above,
In the present embodiment, as shown in FIG. 9, during the display of the enlarged view W, the scale of the enlarged view W may not be changed and only the scale of the map M may be changed by an input signal from the input device 11. It is possible. This is because the enlarged view W is drawn on the basis of the vector data as described above, whereas the map M is drawn on the basis of image data that is separate from the vector data. This is because it is possible to use a process different from the process of drawing.

Further, in the present embodiment, as shown in FIG. 10, both during the route guidance by the normal map M (FIG. 10A) and during the display of the enlarged view W (FIG. 10B),
A distance display D or D ′ indicating the distance from the vehicle position to the target waypoint PP is displayed based on the sensor data from each sensor (see FIG. 1) such as the geomagnetic sensor 1. In this case, the route is being guided by the normal map M (Fig. 10 (a)).
Is displayed in units of 0.1 km (Fig. 10 (a))
While the enlarged view W is being displayed (see the reference numeral D) (see FIG.
In (b)), it is displayed in units of 10 m (see reference numeral D ′ in FIG. 10 (b)).

This is to detect the vehicle position in units of 10 m,
This is possible by changing the minimum display unit based on whether or not to display the enlarged view W. At this time, during route guidance by the map M (FIG. 10A), the result of positioning in units of 10 m is rounded off to change the display to units of 0.1 Km.

As described above, according to the processing for determining the rotation angle θ of the entire enlarged view W in the embodiment, when the road information corresponding to the inflow road for the target waypoint PP cannot be acquired in the display of the enlarged view W. In addition, since the direction of the target waypoint PP with respect to the own vehicle position is the upward direction in the enlarged view W, it is possible to align the planned traveling direction of the own vehicle and the upward direction of the enlarged view W, and the user can enlarge the position. It is possible to easily and accurately recognize the traveling direction of the vehicle and the positional relationship between the vehicle position and the target waypoint PP in FIG.

Further, according to the display center point movement processing in the embodiment, the display center point of the map M is displayed on the map M based on the display position of the enlarged view W on the display screen of the display 17. Since the map M is displayed by moving in the direction in which the power portion is displayed, the portion to be displayed on the map M is hidden by the enlarged view W by displaying the map M and the enlarged view W at the same time. It can be prevented that the map M is not displayed, and the map M can be easily recognized. Especially, the vehicle position C
It is possible to prevent the vehicle position mark indicating “” from being invisible in the enlarged view W, and the route PR to pass through is displayed in a wider range. Therefore, the detailed state of the target waypoint PP is confirmed in the enlarged view W. At the same time, while confirming the own vehicle position on the map M at all times, it is possible to grasp the surrounding situation of the route PR to be passed in a wider range in advance.

Furthermore, according to the target waypoint differentiating display processing of the present embodiment, the enlarged target display of the target waypoint PP.
Is displayed in a different color from the other waypoints P on the map M, the target waypoint PP and the other waypoints P can be easily distinguished and recognized on the map M. Therefore, even when a plurality of waypoints P are present close to each other on the map M, which waypoint P the user is near is the target waypoint P.
Since it can be easily grasped whether or not the image is enlarged and displayed as P, the relationship between the map M and the enlarged view W can be recognized more easily and accurately.

In the above-described embodiments, the case where the target waypoint PP is an intersection has been described, but the present invention is not limited to this, and the waypoint P other than the intersection is difficult to understand. It may be enlarged and displayed as the target waypoint PP.

Further, in the above embodiment, the case where the road, the vehicle position mark C, the target waypoint PP, the entry prohibition mark N based on the road information, etc. are displayed in the enlarged view W has been described. In addition to the above display, a mark indicating a prominent feature near the target waypoint PP may be displayed at the same time.

[0088]

As described above, according to the invention described in claim 1 or 5, the direction of the target waypoint viewed from the vehicle position at a predetermined timing is the traveling direction of the vehicle in the enlarged view. Since it is the corresponding reference direction (for example, upward), it is possible to match the planned traveling direction of the vehicle with the reference direction of the enlarged view.

Therefore, the user can easily and accurately recognize the traveling direction of the own vehicle and the positional relationship between the own vehicle position and the target waypoint in the enlarged view. According to the invention described in claim 2 or 6, based on the display position of the enlarged view on the display screen of the display device, the display center point of the map is substantially opposite to the display position of the enlarged view above the display screen. Since the map is displayed by moving in the direction, by displaying the map and the enlarged map at the same time, it is possible to prevent the portion that should be displayed on the map from being hidden and not displayed by the enlarged map. Easy to recognize.

According to the invention of claim 3 or 7, in addition to the effect of the invention of claim 2 or 6, the display position of the vehicle position mark is within the display range of the enlarged view on the display screen. The map is displayed so that it is not included, and the display center point is moved in the direction in which there is a route to be passed in the future with respect to the display position of the vehicle position mark, so the map is displayed. When displaying and enlarged view at the same time,
It is possible to prevent the vehicle position mark from disappearing due to the enlarged view, and a wider range of routes to be passed in the future is displayed.

Therefore, it is possible to confirm the detailed situation of the target waypoint on the enlarged view, and also to grasp the situation around the route to be passed in a wider range in advance while always confirming the own vehicle position on the map. it can.

According to the invention described in claim 4 or 8, it is possible to recognize the waypoint corresponding to the target waypoint among the waypoints displayed on the map separately from other waypoints. Even if there are a plurality of waypoints on the map, the user can easily grasp which waypoint vicinity is enlarged and displayed as the target waypoint.

Therefore, it becomes easier and more accurate to recognize the relationship between the map and the enlarged view.

[Brief description of drawings]

FIG. 1 is a schematic configuration block diagram of a navigation device according to an embodiment of the present invention.

FIG. 2 is an overall flowchart for displaying an enlarged view.

FIG. 3 is a flowchart for determining a drawing orientation in drawing an enlarged view.

FIG. 4 is a diagram showing an enlarged view display when there is no approach road information.

5A and 5B are diagrams for explaining movement of the map center point, FIG. 5A is a flowchart for moving the map center point, and FIG.
FIG. 6 is a diagram showing a relationship between a map moving direction and a center point moving direction, and FIG. 7C is a diagram illustrating a map direction and a center point moving direction.

FIG. 6 is a diagram showing an example of a map center point movement display when an enlarged view is displayed, and FIG. 6A is a diagram showing a normal display;
(B) is a figure which shows movement of the map center point at the time of an enlarged view display.

FIG. 7 is a display flowchart for identifying a target waypoint.

FIG. 8 is a diagram showing an example of a target waypoint identification display, (a)
FIG. 6A is a diagram showing a normal display time, and FIG. 7B is a diagram showing a target waypoint identification display during an enlarged view display.

FIG. 9 is a diagram showing a scale change display example of a map at the time of displaying an enlarged view, and FIG. 9A is a diagram showing a normal display time;
(B) is a figure which shows the case where only the scale of a map is changed and displayed.

FIG. 10 is a diagram showing an example of distance display when an enlarged view is displayed, FIG. 10A is a diagram showing a distance display at a normal display, and FIG. 10B is a diagram showing a distance display when an enlarged view is displayed. .

FIG. 11 is a diagram showing an enlarged view display in the related art.

FIG. 12 is a diagram showing a method (I) of displaying an enlarged view in the related art, (a) is a diagram showing an actual road condition, and (b) is a node and road data as a node road. It is a figure.

FIG. 13 is a diagram showing a method (II) for displaying an enlarged view in the related art.

[Explanation of symbols]

 1 ... Geomagnetic sensor 2 ... Angular velocity sensor 3 ... Distance sensor 4 ... GPS receiver 5 ... System controller 6 ... Interface 7 ... CPU 8 ... ROM 9 ... RAM 10 ... Bus line 11 ... Input device 12 ... CD-ROM drive 13 ... Display Unit 14 ... Graphic controller 15 ... Buffer memory 16 ... Display control unit 17 ... Display 18 ... Sound reproduction unit 19 ... D / A converter 20 ... Amplifier 21 ... Speaker DK ... CD-ROM disc S ... Navigation device R ... Road PR ... Route PP ... Target waypoint P ... Waypoint W ... Enlarged view C ... Vehicle position mark M ... Map N ... Entry prohibition mark

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoko Hayashida 25 Nishimachi, Yamada, Kawagoe City, Saitama Prefecture 1 Pioneer Co., Ltd. Kawagoe Factory

Claims (8)

[Claims] 1. A map displaying a vehicle position mark corresponding to a preset route and a vehicle position including one or more waypoints, and the waypoint closest to the vehicle position and to be passed in the future. A display control method for simultaneously displaying on a display device an enlarged view enlarging a predetermined range on the map including at least a target waypoint, the direction of the target waypoint with respect to the own vehicle position is detected at a predetermined timing. A detection step and a display control step of controlling the display of the enlarged view so that the detected direction becomes a reference direction corresponding to the traveling direction of the own vehicle in the display of the enlarged view. Display control method. 2. A map on which a vehicle position mark corresponding to a preset route and vehicle position including one or more waypoints is displayed, and the waypoint closest to the vehicle position and to be passed in the future. In the display control method of simultaneously displaying an enlarged view enlarging a predetermined range on the map including at least the target waypoint on the display device, based on the display position of the enlarged view on the display screen of the display device, The display center point, which should be the center of the display on the map when displaying the map, is the direction in which the portion to be displayed on the map is displayed with respect to the display position of the enlarged view on the display screen. A display control method comprising: a moving display step of moving to and displaying the map. 3. The display control method according to claim 2, wherein, in the moving display step, a display position of the vehicle position mark is within a display range in which the enlarged view is displayed on a display screen of the display device. While displaying the map so as not to be included in, the display position of the vehicle position mark on the map,
A display control method, wherein the map is displayed by moving the display center point in a direction in which a route to be passed in the future exists. 4. A map in which a vehicle position mark corresponding to a preset route and a vehicle position including one or a plurality of waypoints is displayed, and the waypoint closest to the vehicle position and to be passed in the future. In the display control method of simultaneously displaying on a display device an enlarged view enlarging a predetermined range on the map including at least the target waypoint, among the waypoints in the route, corresponding to the target waypoint, A determination step of determining a corresponding waypoint that is a waypoint, and a display control for displaying the corresponding waypoint by making the display mode of the determined corresponding waypoint on the map different from the display mode of the other waypoints. A display control method, comprising: 5. A map displaying a vehicle position mark corresponding to a preset route including one or more waypoints and the vehicle position, and the waypoint closest to the vehicle position and to be passed in the future. In a display control device that simultaneously displays an enlarged view of a predetermined range on the map including at least the target waypoint on the display device, the direction of the target waypoint with respect to the vehicle position is detected at a predetermined timing. Detection means, and display control means for controlling the display of the enlarged view so that the detected direction becomes a reference direction corresponding to the traveling direction of the own vehicle in the display of the enlarged view. Display controller. 6. A map displaying a vehicle position mark corresponding to a preset route and vehicle position including one or more waypoints, and the waypoint closest to the vehicle position to be passed in the future. In a display control device that simultaneously displays an enlarged view enlarging a predetermined range on the map including at least the target waypoint on a display device, based on the display position of the enlarged view on the display screen of the display device, The display center point, which should be the center of the display on the map when displaying the map, is the direction in which the portion to be displayed on the map is displayed with respect to the display position of the enlarged view on the display screen. A display control device comprising a moving display means for moving to and displaying the map. 7. The display control method according to claim 6, wherein, in the movement display means, a display position of the vehicle position mark is within a display range in which the enlarged view is displayed on a display screen of the display device. While displaying the map so as not to be included in, the display position of the vehicle position mark on the map,
A display control method, wherein the map is displayed by moving the display center point in a direction in which a route to be passed in the future exists. 8. A map displaying a vehicle position mark corresponding to a preset route and one's vehicle position including one or more waypoints, and the waypoint closest to the one's vehicle position to be passed in the future. In the display control device for simultaneously displaying on the display device an enlarged view enlarging a predetermined range on the map including at least the target waypoint, among the waypoints in the route, the one corresponding to the target waypoint, Determination means for determining a corresponding waypoint which is a waypoint, and display control for displaying the corresponding waypoint by making the display mode of the determined corresponding waypoint on the map different from the display mode of the other waypoints. A display control device comprising: