JPS61194480A - 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] The present invention relates to an on-vehicle navigation device.

2. Description of the Related Art Recently, so-called in-vehicle navigation devices have been proposed that display a map screen useful for vehicle operation by installing a screen display such as a CRT or a liquid crystal display inside the vehicle.

It is desirable for such in-vehicle navigation devices to display images that anticipate the needs of the passenger, rather than simply displaying a map screen specified via the keyboard, from the perspective of reducing input operations for the passenger. .

SUMMARY OF THE INVENTION An object of the present invention is to provide an in-vehicle navigation device that displays image information useful to a passenger when a predetermined time (including the time based on the sun's midpoint) has elapsed from a reference time.

In the in-vehicle navigation device according to the present invention, when the elapse of a predetermined time is detected by a timer (including a clock) that measures the elapse of a predetermined time, reservation information is stored in advance and displayed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying 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 comprising, for example, a character generator, and displays a screen such as a road map. The current position measuring device 3 is, for example, a GPS
(Global Positioning System
m ), 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. ′! f. The input device 5 is, for example, a so-called keyboard, in which the passenger inputs the scheduled time or the elapsed point of the scheduled time, and also inputs restaurant location information or a schedule table to be displayed at that time or point of time, or a memo. It is an input means for inputting. Information input via the input device 5 is written into the memory circuit 6 by the central processing circuit 4. The memory circuit 6 is composed of a solid-state memory such as a so-called RA or M, and functions as a memory 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 CD 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.

The vehicle speed sensor 8 supplies vehicle speed data to the central processing circuit 4 every moment, and the central processing circuit 4 sequentially writes the data into the memory circuit 6.

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 chart 10 in 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. S2). 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 (XH(N), YH(N)) and lower limit address [[
:XL(N) IYL(N)) is obtained and transferred to the storage circuit 6 and written as an upper limit and lower limit address pair (step S3). Note that N is a natural number and is a number assigned to each map surface information piece. On the other hand, if the current position information obtained from the current position measuring device 3 is not an absolute address, the address is converted into an absolute address (step S4). The current address (XP, YP) obtained in this way is
Compare XH(N), YL(N), YH(N), and find that XL(N)<X, <XH(N) and YL(N)
<Y, <YH(N) is detected (step 84', S5, S6).

In this case, it is important to assign numbers to the map screen information pieces so that the smaller N is, the smaller the scale factor becomes, and the search operation is performed in order from the smallest scale factor until the above formula is satisfied. be. By doing this, the screen information including the current location at the smallest scale is displayed. That is,
The central processing circuit 4 instructs the recording medium player 7 to read the Nth map screen information piece (step S7). Next, when the elapse of a predetermined time or the elapse of a scheduled time from the reference time point is detected (step S8), the vehicle speed data obtained from the memory circuit 6 is averaged (step S9), and this average speed is multiplied by a predetermined time to obtain a predetermined time. The distance that can be traveled within is calculated (step 516). The drivable distance is then converted into a distance on the screen based on the scale factor of the read map (step S4).

Next, an arc image is formed with this converted distance as the radius and the current location as the center (step 512). Then, the reservation information such as the location display image or schedule table of the restaurant that has already been reserved is read (step 513).
. Naturally, the restaurant location display image data corresponds to the selected Nth map screen. If the reservation information is correlated with the map screen, the screen is formed based on the map, current location, and reservation information data (step S14, 515). Note that when the reservation information is not related to the map screen, such as a schedule table, only the reservation information is displayed (step S14, 516).

Please note that the schedule will be canceled at the reservation time or after the reservation time has elapsed.
A modification may also be considered in which only information not related to the map, such as a map table, is displayed.

As is clear from the above, the in-vehicle navigation device according to the present invention automatically displays reservation information on the map screen by detecting the arrival of the reservation time or the elapse of the reservation time, and also detects the arrival of the reservation time or the elapse of the reservation time, and automatically displays reservation information on the map screen. This is desirable from the second point of view: ``It is safe because the driver can concentrate on driving because it shows the possible range.''

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an in-vehicle navigation device according to the present invention, FIG. 2 is a flowchart explaining the operation of the device in FIG. 1, and FIG. 3 is a diagram showing an example of a display screen by the device in FIG. be. Explanation of symbols of main parts

Claims (1)

[Claims] Current location detection means for detecting the absolute address of the vehicle's current location;
A display means for displaying the supplied information pieces as a two-dimensional screen, a storage means for storing a group of map screen information pieces including index information indicating absolute addresses corresponding to display ranges in both axis directions of the two-dimensional screen, and an operation command. an input device for inputting data; a control device for supplying one of the map screen information pieces obtained from the storage means to the display means in response to an operation command inputted through the input device; and a control means for supplying the display means with vehicle speed data every moment. An in-vehicle navigation device including a vehicle speed sensor, wherein the control means calculates an average vehicle speed based on the vehicle speed data, sequentially obtains the index information from the storage means, and stores map screen information pieces corresponding to each of the index information. obtain a group of absolute address display range information pieces for each absolute address, search for and select an absolute address display range information piece that includes the current location absolute address, and display the current location on the map screen information piece corresponding to the selected absolute address display range information piece. The address information piece is added and synthesized, and the resulting synthesized screen information piece is displayed until the reservation time elapses or the scheduled time is reached, and the reachable distance is calculated based on the average vehicle speed obtained after the reservation time elapses or after the reservation time and the predetermined time. Calculate the reachable distance and convert it according to the scale factor of the selected map screen information piece to obtain an arc screen with the converted drivable distance as the radius and centered on the current address, and the obtained arc screen and reservation information. An in-vehicle navigation device characterized in that the information piece is supplied to the display means in addition to the composite screen information piece.