JP2000241173A - Navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform map display in which it is easy to understand the direction to a destination on the screen of a navigation device. SOLUTION: At the time of travelling a normal route, north-up or heading-up display is performed (S11). In the case that the distance to a destination reaches a predetermined distance (S12), destination-up display to display the destination on the upper side is performed (S13). By this constitution, it is possible to travel as recognizing in which direction one is travelling toward the destination even on a narrow street or on a winding mountain road.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device for displaying a current location and a map around the current location to provide route guidance for a route to a destination, and more particularly to setting a map display direction.

[0002]

2. Description of the Related Art Hitherto, a navigation device for performing route guidance has been known, and vehicles equipped with the navigation device have been increasing. This navigation device has a current position detecting means such as GPS and a map database for storing map data for the whole country. Then, a map around the current location is displayed on the display, and a current location mark is displayed on the map. As a result, the user can always recognize the current position as a position on the map. In addition, if you set a destination, based on the map data,
Search for the optimal route to that destination. When the route is set, an enlarged intersection map (route guide map) for guidance is displayed at an intersection where the vehicle turns left or right,
It gives guidance on the direction of travel and gives guidance on turning left and right by voice.

Here, the map is displayed either by north-up with the north facing upward or heading-up with the traveling direction of the vehicle up. That is, by turning the north side upward as shown in FIG. 6, the route display can be viewed with the same feeling as in a normal map display. In addition, by displaying the traveling direction upward as shown in FIG. 7, a map display that matches the feeling of traveling is obtained.

[0004] By selecting one of these two types of display, the user can obtain a display that suits his or her preference. In many cases, the map display is not always updated continuously.

[0005]

Here, when the vehicle approaches the destination, the driver often wants to recognize the current location and the current traveling direction in relation to the destination. For example,
If the road is heavily curved, such as a mountain path, or if you are heading to a destination on a narrow street,
There was a problem in heading up that it was difficult to understand how the vehicle traveled toward the destination.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a navigation device capable of displaying a map on which the direction of a destination can be easily understood.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a navigation device for displaying a map of a current location and a map around the current location to provide route guidance for a route to a destination. Is performed. As described above, the display in which the destination is located at the upper part allows the user to travel on narrow streets and winding mountain roads while recognizing the direction in which the vehicle is running toward the destination.

[0008] It is preferable that the map display in which the destination is located above is performed when the vehicle comes within a predetermined range from the destination. In this way, by automatically setting the destination up display when the vehicle is within a predetermined distance from the destination, the user can see the display with the destination at the top without any particular operation.

[0009] It is preferable that whether or not a display located at the target ground portion is performed when the predetermined range is reached is preferably settable. Thus, it is possible to set whether or not to shift to the destination up mode according to the user's preference.

When the vehicle arrives at the destination, it is preferable to display a map in which the north is directed upward or the traveling direction of the vehicle is directed upward. This way, when you arrive at your destination,
You can return to the normal map display.

[0011]

Embodiments of the present invention (hereinafter referred to as embodiments) will be described below with reference to the drawings.

FIG. 1 shows the overall configuration of a navigation device according to an embodiment. The navigation ECU 10 includes a CPU,
It has a ROM, a RAM, etc., and performs various data processing.
The navigation ECU 10 has a map database 12
Is connected. This map database 12 is a CD
It is composed of a storage medium such as a ROM and a DVD, and stores map data for the whole country. It is preferable that guidance voice data and the like are also stored here. Navigation ECU
An operation unit 14 is connected to the operation unit 10.
, Various instructions and data are input. The operation unit 14 is composed of buttons and the like, but is preferably composed of a touch panel provided on the surface of the display, whereby various inputs are performed by detecting a touch on the display of the display. A display 16 and a speaker 18 are connected to the navigation ECU 10. The display 16 displays a map around the current location, a current location mark, an enlarged guide map of a guidance intersection, various operation menu screens, and the like.
In addition, various guidance sounds are output from the speaker 18. The position detecting device 20 includes a GPS (global positioning system) device or the like, and detects an absolute position (latitude and longitude) of the vehicle. It is also preferable to use a DGPS device that receives error information about the current position detection from the FM multiplex broadcast and improves the position detection accuracy.
Further, it is also preferable to use self-contained navigation for detecting a position from azimuth detection, traveling distance detection, or the like, or map matching for performing detection position correction based on comparison with map data. Also, get traffic information from beacons,
It is also preferable to use this for route selection and the like.

In such a navigation device,
When setting a route to a destination, first enter the destination. This input is performed by inputting an address, a telephone number, a facility name, or the like, or inputting a position on a map. According to the setting of the destination, the navigation ECU 10 uses the map data in the map database 12 to search for an optimal route from the current position to the destination. Then, the obtained route is displayed on the display 16, and the route can be set as a guide route.

When a route is set in this way,
The set route is displayed on the display 16 together with a map around the current position and the current position mark, and the current position mark moves as the vehicle travels, and the display map is updated.

Here, in the present embodiment, the display screen has three modes. That is,
A destination up display is provided in addition to the north up and heading up similar to the conventional example.

This destination up display screen is a mode in which the destination is positioned above the display screen as shown in FIG. That is, in this destination up display, if the traveling direction is west and the destination is south, south is the upper side.
Depending on the map display, the destination mark is not always displayed. In the case of the destination up display, as shown in the figure, it is preferable to display a mark indicating the north direction and a mark indicating that the destination is upward on a part of the screen. By displaying the mark indicating that the destination is upward, the driver can recognize that the display of the destination has been switched upward from the previous heading-up or north-up display. The direction of the destination can be recognized by indicating the mark indicating the north direction. In addition,
Either the mark indicating north or the mark indicating that the destination is upward may be used.

With such a display, even on a winding mountain road as shown in FIG. 3, it is possible to travel while recognizing which direction the vehicle is traveling toward the destination. Also, when the current traveling direction is not toward the destination, it can be expected that it is necessary to change the traveling direction so as to reach the destination by turning a curve or the like.
As a result, the driver can predict the road to be traveled and use it for driving.

It is preferable to use such a destination up display particularly when approaching a destination. That is, when approaching the destination (for example, 500
m (approx. m), the driver travels to the destination. Therefore, it is preferable to indicate how the vehicle is traveling to this destination.

Therefore, as shown in FIG. 4, when the vehicle is traveling with a destination set, first, a display is set to north up or heading up (S11). In this case, the display to be used depends on the setting of the user. Then, it is determined whether the vehicle has reached a predetermined distance to the destination (S12). If the distance is within the predetermined distance, the display is set to the destination up display and displayed (S13). In this way, by automatically setting the destination up display when the vehicle is within a predetermined distance to the destination, the user can see the destination up display without any particular operation.

Next, it is determined whether the vehicle has arrived at the destination (S1).
4) Until the arrival, return to S13 to continue the destination up display, and return to the original map display (North up or heading up) when the destination is reached (S15).
It is preferable that the original map display is the display set before switching to the destination up. As described above, when the vehicle arrives at the destination, the display is automatically returned, so that the driver does not need to perform any special operation.

As the predetermined distance to shift to the destination up display, a straight line distance between the current position and the destination can be used. Alternatively, the distance may be measured along a route along a route. Furthermore, when the time required to reach the destination is within the predetermined time, it is determined that the distance is equal to or less than the predetermined distance, and the display may be switched to display the destination upward.

Here, as shown in FIG. 5, a key "display switching" is displayed on a normal route guidance screen, and by operating this key, "north up",
It is preferable to display keys for "heading up" and "destination up" so that the display screen can be switched at any time. Thus, a display according to the user's preference can be selected at any time.

It is also preferable to be able to set whether or not to shift to the destination up display when approaching the destination as described above. Thus, it is possible to set whether or not to shift to the destination up display according to the user's preference.

Here, if the user has a detailed map, the destination can be set quite accurately. Also, D-GP
If the S device is used, the detection of the current position is also very accurate. In such a situation, it is possible to recognize the direction of the destination and drive with confidence by setting the correct destination to the upper side.

Next, a specific operation when the destination up display is performed will be described with reference to the flowchart of FIG. When the destination up key is pressed or when the distance to the destination is within a predetermined distance as described above, the destination up display is performed (S21). That is, as shown in FIG. 9, when the coordinates of the destination are (x1, x2) and the coordinates of the current position of the own vehicle are (x2, y2), the linear distance Z is as follows: Z = √ [(x1−x2) ) ² + (y1−y2) ² ]. On the other hand, the road distance L is the remaining distance from the current position to the destination, and is obtained by a route search based on map data. Note that (x1, x2), (x2,
y2) is an absolute position on the map.

When the display shifts to the destination up display, first, the angle θ of the destination with respect to the north-south line passing through the current position is calculated (S22). The angle θ is determined from the current position and the coordinates of the destination by θ = tan ⁻¹ [(x1−x2) / (y1−y2)]. The angle θ is 0 ° in the north direction, positive in the east direction and negative in the west direction.

Next, the own vehicle position is moved to a predetermined position (X, Y) on the screen as shown in FIG. 10 (S2).
3). In the destination up display, the vehicle position (current position mark) is fixed at the position (X, Y) on the screen. In a normal case, (X, Y) is set at the lower center of the screen.

Then, the map is rotated by θ (S2
4). As shown in FIG. 9, north (y direction), east (x direction)
Is positive, clockwise when θ> 0 and clockwise when θ <0. If θ = 0, it remains as it is.

Then, it is determined whether the vehicle has arrived at the destination (S
25) When it arrives, the direction of the map is returned to the original direction (S26). On the other hand, in S25, if the vehicle has not arrived, it is determined whether an instruction to change the direction of the map has been issued (S27). If not, the process returns to S22 and the operation is repeated. On the other hand, S
If there is an instruction to change the orientation of the map in 27, the map is set to the designated orientation (north up or heading up) (S28). It should be noted that if the system is capable of arbitrarily changing the direction of the map, the direction may be the designated direction.

In this manner, a destination up display can be performed based on the map data read from the map database.

[0031]

As described above, according to the present invention,
By displaying the destination at the top, it is possible to travel on narrow streets and winding mountain roads while recognizing the direction in which the vehicle is traveling toward the destination. Further, by automatically setting the destination up display when the vehicle is within a predetermined distance to the destination, the user can see the display with the destination at the top without performing any particular operation. Furthermore, whether or not to shift to the destination up display can be set according to the user's preference.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an overall configuration of an apparatus according to an embodiment.

FIG. 2 is a diagram showing a destination up display.

FIG. 3 is a diagram showing a destination up display on a mountain path.

FIG. 4 is a flowchart illustrating the operation of the embodiment.

FIG. 5 is a diagram showing display switching.

FIG. 6 is a diagram showing a north-up display.

FIG. 7 is a diagram showing a heading-up display.

FIG. 8 is a flowchart showing a destination up display operation.

FIG. 9 is a diagram showing a direction θ of a destination.

FIG. 10 is a diagram showing a state after θ rotation.

[Explanation of symbols]

Reference Signs List 10 navigation ECU, 12 map database, 14 operation unit, 16 display, 18 speaker, 20 position detecting device.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Satoshi Hotta 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture F-term (reference) 2C032 HB06 HC13 HC25 HD04 2F029 AA02 AB01 AB07 AB09 AB13 AB13 AC02 AC04 AC06 AC08 AC09 AC14 AC18 5H180 AA01 BB04 BB13 BB15 FF04 FF05 FF12 FF13 FF22 FF25 FF27 FF32 9A001 DD11 HZ23 JJ77

Claims (4)

[Claims] 1. A navigation device for displaying a map of a current location and a map around the current location and performing route guidance on a route to a destination, wherein the map is displayed so that the destination is located at an upper part. apparatus. 2. The navigation device according to claim 1, wherein the map display in which the destination is located above the destination is performed when the own vehicle comes within a predetermined range from the destination. 3. The navigation device according to claim 2, wherein whether or not a display located on the target ground portion is performed when the predetermined range is reached is settable. 4. The apparatus according to claim 1, wherein when the vehicle arrives at the destination, a map display is performed in which the north is directed upward or the traveling direction of the vehicle is directed upward. Navigation device.