JPS61194482A - Arrival degree display for onboard navigator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Technical field The present invention relates to an on-vehicle navigation device.

BACKGROUND ART Conventionally, in order to indicate the degree to which a vehicle has reached its destination, a distance between a departure point and a destination is set in advance, and the set value is subtracted as the vehicle progresses to obtain the subtracted value. The level of achievement was sometimes displayed digitally. However, such digital values only indicate the expected distance from the current location to the destination, and do not necessarily indicate the accurate remaining distance traveled. Furthermore, the passenger is required to judge the degree of arrival by taking into consideration the distance already traveled and the displayed digital value.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a method for displaying the degree of arrival of an in-vehicle navigation device that clearly shows the degree of arrival from a starting point to a destination.

In the achievement level display method according to the present invention, map screen information pieces are displayed at a scale such that the departure point, destination, and current location absolute address fall within the absolute address range of the display range on both screen axes of the map screen information piece group. The information is searched and detected from small to large, and the detected map screen information pieces are combined with the departure point, destination, and current location absolute address information and displayed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached J drawings.

FIG. 1 shows an in-vehicle navigation device that executes the method according to the present invention, and a display device 1 is composed of a two-dimensional screen display such as a CRT or a liquid crystal display. installed in or near the instrument panel. The display device 1 is controlled by a display control circuit 2 consisting of, for example, a galactor generator, and displays a screen such as a road map. The current position measuring device 3 is, for example, a GPS
(GlobalPoSitining 5yster
n, ), etc., and supplies positional data (address) such as longitude and latitude corresponding to the current position of the vehicle to a central processing circuit 4 comprising, for example, a microprocessor. -! Further, the input device 5, for example, from a so-called keyboard, supplies positional data of a destination point to which the passenger desires to go to the central processing circuit 4 in response to an operation by the passenger. The memory circuit 6 is
For example, it is composed of a solid-state memory such as a so-called RAM, and acts as a storage means for storing programs that define the operating procedure of the central processing circuit 4 and data to be processed by the central processing circuit 4. The recording medium player 7 is, for example, a so-called C
It consists of a D player, and although its responsiveness is not very good, it functions as a storage means for storing a large amount of data. As this storage means, a tape recording medium such as a so-called VTR may be used.

Note that the current location measuring device in the navigation device is not limited to GPS, and other systems may be used, and it is also possible to input the current location manually.

In such a navigation device, a central processing circuit 4 cooperates with a storage circuit 6 and a recording medium player 7 to display various images in response to operation commands from an input device 5. In the present invention, in particular, the central processing circuit 6 executes the operation mode shown in the flowchart of FIG. That is, in this operation mode, first, a scan command is given to the recording medium player 7 to collect index information pieces associated with a plurality of map screen information pieces recorded on the set recording medium (step S1.S ,). This index information piece includes the scale ratio of the corresponding map screen information piece and the absolute address (for example, longitude and latitude) of the screen reference position. Next, arithmetic processing is performed on the contents of each index information piece, and the display upper limit absolute address [Xn (N), Y, □ (N)] and lower limit address on both the X and Y axes for each map screen information piece are determined. (Obtain XL(N), YL(N), :1 and transfer it to the memory circuit 6 as an upper limit and lower limit address pair and write it (
Step S3). Note that N is a natural number and is a number assigned to each map screen information piece. Next, the departure point and destination information inputted by the input device 5 is, for example, relative position information obtained from the position of the cursor on the screen, and this is converted into absolute addresses (Xs, Ys) and (Xt, Yt).
(steps S4 and S5). On the other hand, if the current position information obtained from the current position measuring device 3 is not an absolute address, it is converted into an absolute address (step S6).

The departure address (Xs, Ys), destination address (Xt, Yt), and current address (Xp, Yp) obtained in this way are used as N)
, Y, (N) and find XL(N)<Xs<XH(
N), XL(N) < Xt < X□((N), XL
(N)〈Xp<XH(N), YL(N)<Y8<
Y, □(N), yL(N) < yt < Y, ((
N), and YL(N) < yp < Y, □(N) is detected (steps s7 and s8).

In this case, numbers are assigned to the map screen information pieces in such a way that the smaller N is, the smaller the scale factor is, and the above formula is satisfied in order from the smallest scale factor. be. In this way, screen information including the departure point, destination, and current location is displayed at the smallest scale. That is, the central processing circuit 4 instructs the recording medium player 7 to read the Nth map screen information piece (step S), and reads the obtained Nth map screen information piece, the departure point, the destination point, and the current point. on the same screen (
Step 51o).

Note that step S4. In S5, it is necessary to select in advance the map screen information piece with the minimum scale factor that includes the departure place or the destination from among the screen information pieces using the input device 5 to input the departure place and destination information accurately. It is preferable for this purpose.

FIG. 3 shows an example in which the central processing circuit 4 searches for a map screen including the departure location, current location, and destination by two consecutive operations, and displays these on the display screen of the display device 1.

As is clear from what has been described in Section 2 of ``Effects of the Invention,'' in the reach display method according to the present invention, departure points and destinations included in the display range determined by the upper and lower limit address pairs corresponding to a plurality of map screen information pieces, respectively. The departure point, current location, and destination can be displayed on the map screen with the optimal scale by sequentially searching the map screen information pieces with the smaller scale of the current address and the current address, and the extent to which the vehicle has reached the destination can be displayed. It can be shown clearly at a glance.

[Brief explanation of drawings]

FIG. 1 shows an in-vehicle navigation device that executes the achievement level display method according to the present invention, FIG. 2 is a flowchart showing the achievement level display method according to the present invention, and FIG. 3 shows a display screen obtained by the achievement level display method according to the present invention. It is a figure showing an example. Explanation of symbols of main parts 1...Display device 2...Display control circuit 3
...Current location measuring device 4...Central processing circuit 5
...Input device 6...Memory circuit 7...
recording media player

Claims (2)

[Claims] (1) Current position detection means for detecting the absolute address of the vehicle's current location, input means for supplying the absolute address information pieces of departure and destination, and index information indicating the absolute address range corresponding to the display range in both axes directions of the two-dimensional screen. a storage means for holding map screen information pieces including a storage means for storing map screen information pieces, wherein the index information pieces are sequentially obtained from the storage means and absolute address range information for each corresponding map screen information piece. obtained by calculating a group of fragments, and searching for absolute address range information pieces including the destination and departure absolute addresses and the current location absolute address in order of decreasing scale ratio, and corresponding to the obtained absolute address range information pieces. An attainment display by an in-vehicle navigation device, comprising the step of adding and synthesizing the departure point and destination absolute address information pieces and the current location absolute address information piece to the map screen information piece, and displaying the obtained synthesized information piece. Method. (2) The step of supplying comprises a step of inputting a starting point and a destination as relative positions on the current display screen, and a step of converting the relative positions into absolute addresses. Achievement level display method described in scope 1.