JPH05149755A - Navigation device - Google Patents

Abstract

PURPOSE:To obtain a navigation device which allows signal processing to be made easy and is inexpensive, large, light, and can judge easily. CONSTITUTION:A navigation device is provided with a map recording means 10 where a map is recorded and a transmission display part 11 where a recording surface of the map placed on the map of the map recording means 10 can be seen through and visually inspected. A current position on the map is calculated based on a specified information regarding a GPS data and the map and is displayed on a display means 16.

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 sequentially drawing and displaying a peripheral map of a moving body as the moving body moves.

[0002]

2. Description of the Related Art Conventionally, a GPS navigation device using a GPS (Global Positioning System) receiver utilizing an artificial satellite has been used as a navigation device for various moving bodies such as automobiles, airplanes, and ships. The GPS receiver used in this GPS navigation device normally receives radio waves from three or more GPS satellites, and pseudo range data including the time offset of the receiver between each GPS satellite and the receiving point and each GPS. The position of the reception point is measured from the position data of the satellite, and the GPS positioning data is output.

This GPS positioning data and CD-ROM in advance
There is known a GPS navigation device that performs map matching with map data recorded on a recording medium such as (Compact Disk-Read Only Memory) and displays the current position, traveling direction, etc. of the vehicle on a map screen of a display. ..

That is, as shown in FIG. 4, the conventional navigation device uses the position data from the artificial satellite 1 as GPS data.
The signal is received by the receiving unit 2, and this signal is input to the display control device 3 as GPS data. Then, the display control device 3
Reads out predetermined map data from the CD-ROM 4 in which the map data is stored, performs map matching of the GPS data from the GPS receiving section 2, and then maps it on a display device 5 such as a color CRT or a color LCD as a video signal. The current position or traveling direction of the traveling vehicle is displayed on the screen.

[0005]

However, in order to display the map information in color on the display device 5 as described above, a large amount of data is required and a large-capacity recording medium such as a CD-ROM 4 is required. Also, as a display device, C
When RT is used, the weight is increased and the portability is poor. CR
A color LCD may be used instead of T, but in this case it is very expensive, and the display function is inferior on a monochrome LCD, making it difficult to read the displayed map, and the display device is large and easy to see. You can't. Furthermore, since the display control device 3 needs map matching for matching GPS data with the map information from the CD-ROM,
Signal processing becomes complicated.

SUMMARY OF THE INVENTION In view of the above points, an object of the present invention is to provide a navigation device that is simple and inexpensive in signal processing, large in size, lightweight, and easy to read.

[0007]

DISCLOSURE OF THE INVENTION The present invention is a navigation device adapted to receive GPS data from an artificial satellite and display a current position on a map, and a map description means for describing a map, and Transparency display means that is placed on the map of the map description means and that allows the visible surface of the map to be seen through, and calculating the current position on the map based on the GPS data and predetermined information about the map, A navigation device, comprising: a display control unit for displaying a current position display mark on a transparent display unit.

[0008]

Operation: The map displaying the current location is selected from the map writing means, and the transparent display means is placed on the map so as to be superposed on the map. Predetermined information such as latitude, longitude, and scale of the map center is written on the map, and the display control device calculates a current position on the map based on the predetermined information and GPS data to display a current position mark. Is displayed on the transmissive display means of the display device. The operator can visually recognize the map through the transparent display means and can also read the current position because the current position mark is displayed over the map.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the navigation device of the present invention has a GPS receiving unit 2 that receives GPS information from an artificial satellite 1, and this GPS receiving unit 2 is connected to a display control device 7 that gives a display instruction and performs calculation. Further, the display control device 7 is connected with a display device 10 composed of a simple dot matrix black and white transmissive LCD via a lead wire 13. The display device 10 includes a rectangular frame 12 and a transmissive display unit 11 held therein, and the transmissive display unit 11 has a cross-shaped cursor 1 at the current position.
6 is displayed.

Positioning pins 15 and 15 are attached to the back surface of one side of the frame 12 at appropriate intervals, and the well-known bar code reader 14 and the frame 12 are in contact with the back surface of the other side. A contact switch 17, which operates occasionally, for example, a micro switch 17, is provided. A photo coupler may be provided instead of the micro switch 17.

The display device 10 cooperates with a map book 20 composed of a map sheet in which a plurality of maps of a predetermined area are color-printed as shown in FIG. That is, the display device 1
0 is used so as to be superimposed on the map book 20.
Each map sheet of the map book 20 includes a map writing surface 21 on which a map is written, and the size of the map writing surface 21 corresponds to the transparent display unit 11 of the display device 10. A bar code indicating the latitude, longitude and scale of the map center is printed at a position corresponding to the bar code reader 14 on the frame 12 of the map sheet.

Further, at a position corresponding to the positioning pins 15 on the opposite side of the bar code 24 of the map sheet,
Positioning holes 23, 23 are bored, and one end side of the map book 20 is bound by a holding member 22.

Next, the operation will be described mainly with reference to FIG. The operator flips over the map book 20 and selects a desired map sheet in which his / her current position is described,
The display device 10 is placed on the map book 20 such that the positioning pins 15 are fitted into the positioning holes 23 of the map book 20. At this time, the micro switch 17 of the display device 10 operates, and the display control device 7 detects this (step S1 in FIG. 3). Next, the display control device 7 instructs the bar code reader 14 to read the bar code 24 of the map book 20, this bar code data is input to the display control device 7, and the latitude, longitude, and scale data of the used map are displayed. It is read (step S2). Then
The display control device 7 reads the GPS data sent from the GPS receiving unit 2 (step S3). The display control device calculates the current position based on the GPS data and the latitude, longitude, and scale data of the used map (step S
4). The current position is displayed as an image signal on the display device 10 by the cursor 16 (step S5). The operator can visually check the color map thereunder through the transparent transmission display section 11 of the display device 10, and the current position cursor 16 on the map allows the current position to be easily grasped on the map.

When the current position moves and the next map sheet is developed, the display device 10 is removed from the map book 20 (step S6), and after a predetermined time has passed (step S7),
Wait for the next current position display.

When the GPS data is changing sequentially with time (moving), the moving speed of the current position is calculated based on the scale data and displayed on the LCD.

The display control device 7 is provided with a bar code 2
A bar code is sufficient because there is little information given from 4, but a magnetic storage medium (tape or the like) may be used instead of the bar code, and the material of the map book 20 may be paper or plastic. Further, instead of the bar code, the necessary information of the map may be directly input to the display control device by a key switch.

[0017]

Since the present invention is constructed as described above,
A large-sized (10-inch class) display device can be used, an easy-to-read display can be realized at a low cost and a light weight.
Since the ROM is not necessary, it is inexpensive and the signal processing of the display controller is simple.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a navigation device of the present invention.

FIG. 2 is a perspective view of a map book according to the present invention.

FIG. 3 is a flowchart showing the operation of the navigation device of the present invention.

FIG. 4 is a configuration diagram of a conventional navigation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Artificial satellite 2 ... GPS receiving part 7 ... Display control device 10 ... Display device 11 ... Transmissive display part 12 ... Frame body 14 ... Bar code reader 15 ... Positioning pin 16 ... Current position cursor 20 ... Map book 23 ... Positioning hole

Claims (1)

[Claims] 1. A navigation device adapted to receive GPS data from an artificial satellite and display a current position on a map, wherein the navigation device is a map describing means in which a map is described, and the map describing means. Transparent display means placed on the map and visible on the map, and the transparent display means for calculating the current position on the map based on the GPS data and predetermined information about the map. And a display control means for displaying a present position display mark on the means.