JPH1137769A - Display device in car navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make indication of the position of driver's own car arbitrarily movable in an display area, by providing a change means for changing an indication position of a car position mark to an arbitrary coordinate position. SOLUTION: An operation key of an input device 6 is operated to switch a system to driver's own car indication position change mode, and referring to a cueing data, the presence or absence of demand from a user is judged. Relating to the cueing data, a demand from a user is cued-in based on the input from a touch-panel or a remote control device. When a user operates a direction key of an input device 6 or a remote control device, or issues a direction indication with the touch panel of a display device 7c, a relative dot coordinate of car's position from the center of a displayed screen when a center point of display area is moved by one dot in a required direction is calculated by a main controller 1. Then, whether a car's position mark reaches outside a specified range on a display screen or not is judged, and in case of 'No', a map data and the driver's own car's position mark are moved by one dot in a required direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device in a car navigation system, and more particularly to a function of changing a display position of a vehicle.

[0002]

2. Description of the Related Art FIG. 10 is a schematic diagram showing map drawing / display on a display device of a conventional car navigation system. In FIG. 10, the drawing area specifically means an area in which the map data stored in the video RAM memory of the video processing device is actually developed, and the display area corresponds to one screen displayed to the user in the drawing area. (Corresponding to one window in the multi-window type). In the car navigation system, the positional relationship of the display area on the drawing area is handled by dot coordinates. The vehicle position P
The positional relationship between and the display area is also handled in the dot coordinate system, and the positional relationship is also stored in the memory.

The user can move the display area to a desired position within the drawing area. A conventional method of actually moving the display area (moving the own vehicle position) will be described below. Based on position information from autonomous navigation sensors including a GPS receiver and a vehicle speed sensor, the longitude and latitude of the own vehicle position are calculated. Based on the latitude and longitude, the vehicle position (dot coordinates) on the drawing area is calculated. The reference position (dot coordinates) of the display area on the drawing area is determined from the positional relationship between the display area and the position of the vehicle.

[0004]

In the conventional system,
Regarding the positional relationship between the display area and the position of the host vehicle, the user selects one prepared in advance by the system. That is, in the conventional system, the position of the own vehicle on the display area is displayed at, for example, substantially the center position of the display area, and even if the display area is moved, the own vehicle position is substantially at the center position. As a result, the user could not freely change the position of the vehicle in the display area.
FIG. 11 shows a practical example of a conventional display screen, in which a vehicle mark is displayed in a circle substantially at the center of the display screen.

An object of the present invention is to provide a display device in a car navigation system which solves the above-mentioned conventional problems.

[0006]

A display device in a car navigation system according to the present invention is a display device in a car navigation system for displaying a vehicle position mark at a predetermined coordinate position in a map area on a display screen. Changing means for changing the display position of the position mark to an arbitrary coordinate position.

[0007]

FIG. 1 is a block diagram showing one embodiment of a display device in a car navigation system according to the present invention. In FIG. 1, 1 is a main controller including a microcomputer or the like, 2 is a vehicle position processing device, 3 is a map database, 4 is a storage medium reading device,
5 is a main memory, 6 is an input device, 7 is a video processing device,
8 is an audio output device.

The own-vehicle position processing device 2 comprises an autonomous navigation sensor 2a, a GPS receiver 2b, and an own-vehicle position calculating device 2c. The own vehicle-related sensor information from the autonomous navigation sensor 2a and the GPS from the GPS receiver 2b are provided. The own vehicle position is calculated by the own vehicle position calculation device 2c based on the current position information of the own vehicle by the satellite radio wave reception. The storage medium reader 4 is a CD-R
The map data is read from the map database 3 such as OM and supplied to the main controller 1.

The main controller 1 includes unit data of a road network from the storage medium reading device 4 and
The recommended route is calculated based on the current position data of the own vehicle from the own vehicle position processing device 2 and the position data relating to the departure point and the destination of the own vehicle input from the input device 6, and the obtained recommended route data is calculated. It is stored in the main storage memory 5. Further, the main controller 1 reads the recommended route data from the main storage memory 5 and supplies the recommended route data to the video processing device 7. The video processing device 7 includes a graphic controller 7a, a video RA
M7b and a display device 7c. The graphic controller 7 stores recommended route data in the video RAM 7b.
And the recommended route data read from the video RAM 7b is supplied to the display device 7c and displayed on the display screen.

[0010] The display device 7c is equipped with a touch panel including touch buttons constituting a part of the input device 6. This touch panel has touch buttons, and when the user touches the touch buttons on the touch panel, a push command signal is supplied to the main controller 1. Subsequently, when the user further presses the touch buttons, the main controller 1 corresponds to the buttons. Turn on the feature,
Then, when the user stops touching the touch button,
The main controller 1 is configured to be supplied with a release command signal. The configuration for supplying such a signal is well known in the art, and a specific description thereof will be omitted here.

In the above configuration, the present invention realizes providing map information more needed by the user by allowing the user to freely set the own vehicle position on the screen of the display device. It is. First, the user operates a specific operation key of the input device 6 to switch the system to a mode for changing the own-vehicle display position (hereinafter, referred to as the own-vehicle display position change mode). When the vehicle display position change mode is set, for example, FIG.
As shown in (A), before the change, the own vehicle display mark at the substantially center position in the display area can be moved based on the system specifications in advance, and the user can display the display area and the own vehicle position display position. Change the positional relationship with the desired positional relationship. The system calculates the amount of movement from the center of the display area to the position of the host vehicle after the change (dot coordinate system dx, dy)
Is stored in the memory. FIG. 2B shows the display area and the own vehicle display mark after the own vehicle display position is changed, and shows, for example, a case where the user changes the own vehicle display position to a coordinate position on the upper right of the display area. When updating the actual position of the own vehicle based on the traveling of the own vehicle, if the position of the own vehicle on the drawing area is determined, the center position of the display area on the drawing area is calculated by adding the moving amount to the dot coordinates of the own vehicle position. Is the point shifted by

Next, the operation in the above-described own-vehicle display position change mode will be described with reference to the flowchart shown in FIG. In step S0, the user first operates a specific operation key of the input device 6 on the menu screen to switch the system to the host vehicle display position change mode. Then S1
In step S2, it is determined whether or not there is a request from the user. The queuing data queues a request from a user based on an input from a touch panel or a remote control device. S2
If there is a request from the user, the process proceeds to S3, and the type of the request from the user is determined.

If the request from the user is "direction from the direction key and the touch panel" (that is, the user operates the direction key of the input device 6 or the remote control device (not shown) or touches the touch panel of the display device 7c). If there is a direction instruction with a touch button by a touch), the process proceeds to S4, and the position of the own vehicle position from the center of the display screen when the center point of the display area is moved by one dot in the requested direction (that is, usually). Relative dot coordinates (dx, d
y) is calculated by the main controller 1. Next, the process proceeds to S5, where the main controller 1 determines whether or not the own vehicle position mark has reached a position outside the specified range on the display screen. If yes, the process returns to S1, and if no, the process proceeds to S6. In S6, one dot, the map data (map ground) and the own vehicle position mark on the user ground are moved in the requested direction, and then the process returns to S1.

On the other hand, in S3, if the request from the user is "enter key and enter button" (that is, the user operates the enter key of the input device 6 or the display device 7c
If there is an instruction to determine with the touch button by touching the touch panel), the process proceeds to S7, where the relative (dot) coordinates (dx, dy) of the vehicle position from the center point of the display area are held, and then proceeds to S8. Finish the work. Therefore,
The own-vehicle position mark is displayed at a point moved by relative (dot) coordinates (dx, dy) from the center point of the display area at the time of determination. If "cancel of current location button, menu button, etc." is requested in S3, the process proceeds to S8, and the operation ends.

FIG. 5 is a schematic diagram for explaining the mode switching. On the display screen of the display device 7c, in the normal mode, as shown in FIG. 5A, a vehicle position mark is displayed by a solid line circle substantially at the center of the display area. When the mode is switched from the normal mode to the own-vehicle display position change mode, as shown in FIG. 5B, the own-vehicle position mark is changed from a solid circle to a dotted circle, and the user is notified that the mode has been switched. Call attention.

FIG. 5C shows a display screen of the display device 7c during the operation of changing the own vehicle display position in the own vehicle display position change mode. Here, a state is shown in which the vehicle position mark is moving from the center of the display area, for example, diagonally to the upper right. At this time, the vehicle position mark is not actually moved in the direction determined by the scroll keys of the remote control device or the touch panel of the display device 7c, but is moved in the display area in the direction opposite to the determined direction. By doing so, it is displayed as if the own vehicle position is being moved. Naturally, the geographical positional relationship between the own vehicle position and the map image does not change. (In this mode, scrolling of the map to the drawing area where the own vehicle position mark is not displayed is desirably interrupted.) This example shows a case where the upper right direction key is pressed.

When the user's vehicle display position is determined by operating the input device 6 or the determination key of the remote control device or the determination button of the touch panel of the display device 7c from the state of FIG. 5C, the display screen of FIG. Thus, the dotted circle of the vehicle position mark becomes a solid circle.

Next, the flowchart of FIG. 6 shows an actual vehicle position updating operation based on the traveling of the vehicle. First, S10
Then, the own vehicle position update is started, and in S11, own vehicle position information (longitude and latitude, own vehicle direction, etc.) is obtained from the own vehicle position processing device 2.

Next, at S12, the video RAM of the own vehicle position
The dot coordinates on the drawing area 7b are calculated. For this purpose, as shown in FIG. 7, the system uses the details of the points indicated by the black triangle marks (that is, the drawing areas of the video RAM 7b for nine screens are secured in this example) (that is, the boundary intersections of the drawing areas). The degree data is stored in the main storage memory 5 in advance, and the dot coordinates on the video RAM are calculated by using the longitude / latitude data and comparing with the vehicle position information (latitude / latitude) obtained in S11. Although only the map is drawn in the drawing area, as shown in the enlarged view, the display device 7c
, A menu button, a vehicle position mark, a circle surrounding the vehicle position mark, and the like are superimposed on the map.

Next, at S13, the video RAM of the own vehicle position
7b from the dot coordinates on the drawing area (−dx, −d
y) The display area is moved so that the moved point becomes the center of the display area of the display device 7c. At this time, when the direction of the own vehicle changes, it is reflected on the own vehicle position mark. Note that, of course, the relative positions of the own vehicle position mark, the circle, the menu button, and the like with respect to the display area do not change. In FIG. 8, in the drawing area of the video RAM 7b, the position of the previous display area indicated by a solid line and the position of the next display area indicated by a dotted line are shown. Next, in S14, the own vehicle position updating operation is completed.

As described above, in the own-vehicle display position change mode, the own-vehicle position mark can be moved to a desired position in the display area. This is effective when information on a specific direction is desired during walking, such as when the point being visited is on the left side (or right side) of the road.

In FIG. 11, which is a conventional display example, the left side of the screen is the sea and it is not necessary to particularly display it. Therefore, it is better to shift the vehicle position to the left according to the present invention as shown in FIG. This is useful information. In addition, in FIG. 3, which is driving and cannot be seen in FIG. 11, the “△△ archeological site” can be known, and this is a convenient function such as “let's drop in a little”.

[0023]

[Embodiment] Since the display screen may be multi-windowed in the future, the present system, for example, as shown in FIG. 9, displays a route window for route search on the display screen of the display device 7c. When a child window for displaying traffic congestion information and the like is superimposed and displayed, the own vehicle position mark is moved from the position of FIG.
When the child window is moved to the position (B), the child window can be automatically moved to an appropriate position in accordance with the movement of the own vehicle position mark, and the child window can be flexibly moved and arranged. Can respond to.

[0024]

According to the present invention, it is possible to arbitrarily move the vehicle position display in the display area.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a display device in a car navigation system according to the present invention.

FIGS. 2A and 2B are display examples of a display area, wherein FIG. 2A shows a state before a host vehicle display position is changed, and FIG. 2B shows a state after a host vehicle display position is changed.

FIG. 3 shows a practical example after a vehicle display position in the own vehicle display area is changed.

FIG. 4 is a flowchart illustrating an operation in the block diagram of FIG. 1 in a vehicle display position change mode.

FIG. 5 is a schematic diagram illustrating mode switching.

FIG. 6 is a flowchart illustrating an actual host vehicle position updating operation based on running of the host vehicle.

FIG. 7 is a conceptual diagram illustrating retention of latitude and longitude data in a drawing area of a video RAM.

FIG. 8 is a conceptual diagram illustrating a previous display area position and a next display area position in a drawing area of a video RAM.

FIG. 9 shows an example of a display screen of a display device according to another embodiment of the present invention, wherein (A) shows a state before a display position of the own vehicle is changed,
(B) shows a state after the display position of the own vehicle is changed.

FIG. 10 shows a schematic diagram of map drawing / display on a display device of a conventional car navigation system.

FIG. 11 shows a practical example of a conventional display screen.

[Explanation of symbols]

 Reference Signs List 1 main controller 2 own vehicle position processing device 3 map database 4 storage medium reading device 5 main storage memory 6 input device 7 video processing device 8 audio output device 2a Autonomous navigation sensor 2b GPS receiver 2c Own vehicle position calculation device 7a Graphic controller 7b Video RAM 7c Display device

Claims (1)

[Claims] 1. A display device in a car navigation system for displaying an own vehicle position mark at a predetermined coordinate position in a map area on a display screen, a changing means for changing the display position of the own vehicle position mark to an arbitrary coordinate position. A display device in a car navigation system, comprising: