JPH01134210A - On-vehicle navigation device - Google Patents

Abstract

PURPOSE:To obtain the easy-to-handle navigation device to be mounted on a vehicle by displaying the closest point on an expected traveling path together with a mark, and inputting the number of the mask in order and setting the expected traveling path. CONSTITUTION:A map of the closest road branch point on the expected traveling path is displayed on a display device 5 and at the same time, branch points P0-P4 with numbers are added to all branch roads and displayed. Then an input stage (touch key) 13 is provided, the driver or a person on the vehicle input branch points of the branch roads in order to set coming expected traveling paths in order. Consequently, the handling is easier than when expected traveling paths are set on a display device 5 with a light pen.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an on-vehicle navigation device that simplifies the setting of a scheduled travel route for a vehicle.

[Prior Art] A conventional vehicle navigation device l shown in FIG.
Based on the distance data obtained from the azimuth sensor 3 and the azimuth data obtained from the azimuth sensor 3, the central processing unit 4 estimates the vehicle's travel route and displays the estimated current location on the road map displayed on the display device 5 inside the vehicle. It takes a composition. A road map of the area where the vehicle is traveling is read into the central processing unit 4 from a road map information recording medium 6 such as a CD-ROM that records road map data for the entire country, and is displayed on the display device 5 via the display circuit 7. . In this example, a light pen 8 for inputting a planned driving route is connected to the central processing unit 4, and the driver or passenger can trace the road map displayed on the display device 5 with the light pen 8. Now you can enter the planned route to your destination.

[Problems to be Solved by the Invention] The above-mentioned conventional in-vehicle navigation device 1 uses a method of tracing the screen of the display device 5 using the light pen 8 when inputting the planned driving route to the destination. Therefore, in areas where there are many roads, delicate handwriting is required on the tip of the Light Ben 8, and it may be difficult to input accurately without enlarging the dense area.Moreover, if the reading accuracy of the Light Pen 8 is poor, it may not be possible to read the handwriting. There is no point in increasing the calculation precision when converting a point to coordinate data, and since the light pen 8 is a precision electronic machine, it is necessary to take protective measures to prevent it from breaking even if it is handled roughly as it is used in a car. There were problems such as:

Means for Solving Problem U] The present invention solves the above problems, and the present invention solves the above problems, and allows the vehicle travel schedule inputted by the driver or fellow passenger to be displayed on the road map displayed on the display device inside the vehicle. An in-vehicle navigation device that displays a route and provides navigation guidance for a vehicle, which displays all branching roads with landmarks at the nearest branch point where two or more roads diverge on the planned travel route. The present invention is characterized by comprising a branch road display means and a planned travel route input means for selecting a branch road to be traveled on by specifying the landmark from among the branch roads with landmarks displayed by the branch road display means. It is something to do.

[Operation] This invention displays all the branching roads with marks at the nearest branch point where two or more roads diverge on the planned travel route, and selects one of the marked branching roads. The branch road on which the vehicle is scheduled to be traveled is selected by specifying a landmark, and the planned travel route can be set by repeating the landmark designation operation.

[Examples] Examples of the present invention will be described below with reference to FIGS. 1 to 4. 1.2 is a circuit diagram showing an embodiment of the in-vehicle navigation system of the present invention, a diagram showing a road map displayed on a screen on a display device, and 3.
．． FIG. 4 is a flow chart for explaining each operation of route setting and route guidance by the central processing unit shown in FIG. 1, respectively.

In FIG. 1, the onboard navigation device 11 is located at
The central processing unit 12 is provided with a branching road display function that displays all branching roads with landmark numbers at the nearest branch point where the above roads branch off. A plurality of touch keys 13 are provided as a planned travel route input means for selecting a branch road to be traveled on by specifying a number from among the numbered branch roads. The number of touch keys 13 that exceeds the maximum number of roads branching from a branch point may be provided, but in this embodiment, eight touch keys 13 are arranged near the display device 5.

To set the planned travel route, first, the starting point S is input by specifying a street address or fingertip designation on the road map shown in FIG. 2 displayed on the screen of the display device 5. next,
A branch point P that you plan to pass at an intersection or corner along the route you plan to travel to destination E. , P r
For each , Pt, , , the branch road is designated by number. That is, following the designation of the departure point S made in step (101) shown in FIG.
) is the branch point P closest to the starting point S. , all branch roads branching from there are displayed with numbers like ■, ■, ■.

Then, the driver or fellow passenger touches the touch key with the same number as the branch road on the planned travel route from among the touch keys 13 to input his or her driving intention.

If the judgment in the judgment step (103) is affirmed,
The designated branch road is read from the road map information recording medium 6, and step (104) follows step (104).
In 5), the route data is stored in the memory within the central processing unit 4.

In this way, when the branch road at the first branch point is designated with a number, for example, ■, the next step is step (108).
As shown in , the nearest branch point P on the designated numbered branch road is displayed with all branch roads branching from it numbered.

Then, a route is selected again by the same number designation using the touch key 13, and in step (110) when an affirmative result of the determination in step (109) is received, the route data is stored in the memory. In addition, this series of processing is
It is repeated until the destination is reached.

By the way, for example, when specifying the number at the branch point P3, if it becomes necessary to move the display to center the branch point P on the screen of the display device 5, that is, to scroll, the process proceeds to step (106). In response to the check result of the necessity of screen scrolling performed in step (107), the scroll amount (ΔX,
ΔY) is added, and calculations for display movement are executed.

In this way, the in-vehicle navigation device 11 locates the nearest branch point Po, Pl+ where two or more roads diverge on the planned travel route.
At Pt, , , all branch roads are numbered and displayed, and from among the numbered branch roads displayed, select the branch road on which you plan to drive by touching key 1.
Since selection is made by specifying a number using 3, by repeating the number specifying operation with a simple key touch, the driver can input the planned travel route to the destination according to his/her intention. For this reason, as with the conventional driving route input method using the light pen 8, delicate handwriting with the tip of the pen is required to designate roads in densely populated areas, and the handling of the light pen 8, which is a precision electronic device, is difficult. Since the central processing unit 12 only needs to display the branch road number for the nearest branch point on the road for which the travel schedule has been input, the central processing unit 12 does not need to be careful in There is no need to read a large amount of data at once, and software processing for reading can also be simplified.

Here, when the route setting from the departure point S to the destination E is completed and the vehicle starts traveling from the departure point S, the route guidance by the on-vehicle navigation device 11 is performed according to steps (121) and subsequent steps shown in FIG. Begins.

First, the first branch point P0 is a branch point P whose distance from the departure point S is set in advance. The central processing unit 14 issues a left turn command. In this case, the left turn command is ``Please turn left'' by the synthesized voice.
On the other hand, on the screen of the display device 5, a flashing arrow or a display such as rTURN To LEPTJ is notified.

Route guidance after the branch point P0 is performed by making these designated points correspond to the above-mentioned route setting in which intersections, turns, etc. are designated, and setting these designated points as reference points. That is, step (12
As shown in 2) to (125), before reaching the verification point, the next route data is taken in and the estimated current location of the vehicle is displayed. After additionally processing the service data regarding public interest information around the road in steps (126) to 128), preset route data is called in the next step (129).

When the route data regarding the set route is called up, in step (130), the address of the voice ROM (not shown) built in the central processing unit 14 is specified, and the guide route is announced using synthesized voice.

In that case, if the service data is limited, step (132) following the voice notification in step (131)
), the service data is displayed, and step (13)
In step 3), the processes shown in steps (122) to 133) are repeated until it is determined that the vehicle has reached the destination.

If the driver accidentally turns right at a point where he or she should have turned left, the central processing unit 14 detects that the direction of travel of the vehicle after the planned passing point deviates from the planned route, and immediately guides the vehicle. Notify you that you have deviated from the route. Therefore, the driver can immediately notice the error in the vehicle's route selection, and can immediately start correcting the route.

In the above embodiment, the touch key 13 was used to specify a branch road at a branch point, but each branch road can be rotated forward or reverse around the nearest branch point, and with a single key operation to command forward or reverse rotation. By preparing a pointer that stops at a branch point as a landmark for displaying a branch road, and displaying this pointer on the screen at each nearest branch point, you can specify the branch road landmark at the branch point by pointing the pointer forward, in reverse, and for deciding. It is also possible to do this using only the three keys.

[Effect of the invention] As explained above, the present invention provides two
At the nearest branch point where the above roads diverge, all branch roads are marked and displayed, and from among the displayed branch roads with landmarks, the branch road on which you plan to drive is selected by specifying the landmark. Because of this structure, the planned driving route input means can input the planned driving route to the destination according to the driver's intention by repeating the number designation operation with a simple key touch. Unlike the planned driving route input method, there is no need for delicate handwriting with the tip of a pen to designate roads in densely populated areas, or careful handling of the light ben, which is a precision electronic device. Since the branch road display means only needs to display branch roads as landmarks for the nearest branch point on the road for which the travel schedule has been input, there is no need to read out a large amount of data from the road map information recording medium at once, and the readout process is simple. It also has excellent effects such as simplification of the software processing for this purpose.

[Brief explanation of the drawing]

Figures 1 and 2 are a circuit diagram showing an embodiment of the in-vehicle navigation system of the present invention and a road map displayed on a display device, respectively, and Figures 3 and 4 are similar to Figure 1, respectively. FIG. 5 is a flowchart for explaining the route setting and route guidance operations performed by the central processing unit shown, and FIG. 5 is a circuit configuration diagram showing an example of a conventional vehicle-mounted navigation device. 510. Display device, 11. ,,vehicle navigation device, 12. , , central processing unit, 13. ．． . touch key.

Claims (1)

[Claims] The road map displayed on the display device inside the vehicle,
An in-vehicle navigation device that displays a scheduled travel route of a vehicle input by a driver or a passenger and serves as navigational guidance for the vehicle, at the nearest branch point where two or more roads diverge on the scheduled travel route. , a branch road display means for displaying all branch roads with landmarks; and a driving method for selecting a branch road to be traveled by specifying a landmark from among the numbered branch roads displayed by the branch road display means. An on-vehicle navigation device provided with a planned route input means.