JPH05113752A - Navigation system - Google Patents

Abstract

PURPOSE:To obtain desired information easily by displaying a guide mark in a position corresponding to the location on the map image plane of a display on the basis of read location data and guide mark data. CONSTITUTION:In the case of menu selection display being the one corresponding to the service of a gallery and a museum, the menu image plane to select either the gallery or the museum is displayed by selecting menu selection display. When a user selects the gallery, the display flag of the gallery is set to '1'. Upon terminating the selection of 'yes' or 'no' in the display, a CPU 7 refers to position data on the basis of codes by service types corresponding to the gallery and displays a guide mark in a position corresponding to the location of the gallery existing in the display image plane of a display 17. On the display image plane of the display 17, the guide mark is thereby displayed only in the position corresponding to the location of the gallery.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation system, and more particularly to a GPS (Global Positioning System).
The present invention relates to information display processing in a vehicle-mounted GPS navigation system using a receiver.

[0002]

2. Description of the Related Art Conventionally, a GPS navigation system using artificial satellites has been used as a navigation system for various moving bodies such as automobiles, airplanes and ships. The GPS receiver used in this GPS navigation system 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. Measure the position of the receiving point from the satellite position data, and
It is configured to output PS positioning data.

This GPS positioning data and CD-ROM in advance
There is known a GPS navigation system that performs map matching with map data recorded on a recording medium such as (Compact Disk-Read Only Memory) to display the current position, signal direction, etc. of the user on a map screen of a display.
In such a GPS navigation system,
In addition to displaying the current position on the map screen, the location of various facilities such as restaurants and theaters is stored in advance in the CD-ROM as service information, and guide marks (for example, a heart mark) are stored at corresponding positions on the map screen. Some have a function to display a guide mark)
Based on this guide mark display, the target facility can be easily reached.

[0004]

In the above-mentioned conventional GPS navigation system, when the locations of various facilities are displayed on the screen of the display using guide marks, for example, when a restaurant is selected, the type (for example, Japanese food) is selected. , Western food, Chinese, etc.) all restaurants were to be displayed. Therefore, when it is attempted to provide more information, the number of guide marks displayed on the same screen increases, which makes it more difficult to see and it is difficult to obtain desired information.

Therefore, an object of the present invention is to provide a navigation system which makes it easy to see the display screen and can easily obtain information on necessary facilities and the like.

[0006]

In order to solve the above problems, the present invention performs map matching based on the current position data obtained by positioning the current position of the self and the map data stored in advance, and displays the map. In a navigation system that displays the current position of the user on the map screen of No. 1, first location data indicating the location of each facility, type data indicating the type to which the facility belongs, and guide mark data corresponding to the type data are stored. Storage means, second storage means for storing the type of facility to be displayed on the map screen as display type data based on an input from the outside, and the first storage means based on the display type data. The location data corresponding to the facility belonging to the type to be displayed is read out, and the location data and the guide mark data are read. A guide mark display control means for displaying the guide mark on the basis of the data at a position corresponding to the location on the map screen of the display is configured with a.

[0007]

According to the present invention, the second storage means stores the type of facility to be displayed on the map screen (for example, Japanese restaurant, Western restaurant, theater, etc.) as display type data based on an input from the outside. To do. As a result, the guide mark display control means reads out the location data (for example, latitude and longitude) corresponding to the facility belonging to the type to be displayed from the first storage means based on the stored display type data,
A guide mark is displayed at a position corresponding to the location on the map screen of the display based on the read location data and guide mark data (for example, font data).

Therefore, since only the guide marks necessary for the user are displayed on the display, it is possible to easily obtain the desired information without making the screen difficult to see by displaying an unnecessarily large amount of information. You can

[0009]

Embodiments of the present invention will now be described with reference to FIGS. FIG. 1 is a block diagram showing a basic configuration when the present invention is applied to a vehicle-mounted navigation system.

The on-vehicle navigation system 100 is
Geomagnetic sensor 1 that outputs direction data in the traveling direction of the vehicle
, An angular velocity sensor 2 that detects the angular velocity when the vehicle is rotating and outputs angular velocity data, a mileage sensor 3 that outputs mileage data by detecting and integrating the number of rotations of the shaft, and a radio wave from a GPS satellite. GPS receiver 4 for receiving GPS positioning data and outputting GPS positioning data; a system controller 5 for controlling the entire navigation system based on azimuth data, angular velocity data, mileage data and GPS positioning data; key panel, touch panel, remote An input device 11 for inputting various data such as a control device, and various data is read from the CD-ROM disc DK under the control of the system controller 5,
A CD-ROM drive 12 for outputting, a display unit 13 for displaying various display data under the control of the system controller 5, and an audio reproducing unit 18 for reproducing and outputting various audio data under the control of the system controller 5 are provided. Is configured. CD-ROM disc D here
K functions as a first storage means.

The system controller 5 includes an interface section 6 for interfacing with the outside, a CPU 7 for controlling the entire system controller 5, a ROM (Read Only Memory) 8 in which a control program for controlling the system controller is stored, R having a non-volatile memory unit (not shown) and writably storing various data
AM (Random Access Memory) 9 and the input device 11, the CD-ROM drive 12, the display unit 13 and the audio reproduction unit 18 are connected to the bus line 10
Connected through. Here, the system controller 5 functions as a guide mark display control means, and the RAM 9
Serves as a second storage means.

The display unit 13 controls the entire display unit based on the control data sent from the CPU 7 via the bus line 10.
4, a buffer memory 15 including a memory such as VRAM (Video RAM) for temporarily storing image information that can be immediately displayed, and a display such as a liquid crystal display device or a CRT based on the image data output from the graphic controller 14. And a display control unit 16 that performs display control of 17.

The audio reproduction unit 18 includes a D / A converter 19 for performing digital / analog conversion of audio digital data sent from the CD-ROM drive 12 or the RAM 9 via the bus line 10, and the D / A converter 1.
Amplifier 2 for amplifying audio analog signal output from 9
0 and a speaker 21 for converting the amplified voice analog signal into acoustic vibration and outputting the acoustic vibration.

Next, referring to FIGS. 2 to 4, the CD-R
The data structure in the OM disc DK will be described. C
In the D-ROM disk DK, a map leaf management table 50 for managing map data for display, and a service guide mark different for each service content of each facility displayed on the map screen are stored as an external character code for each classification. Guide mark external character code data 51, Kanji font data 52 storing fonts of various display characters (including external characters),
Map display unit data 53A, 53B, and 53C, which are blocks of various data for map display, are stored based on the contents of the map leaf management table 50. Here, the service content is a service provided in the facility, and is different for each facility such as a Japanese restaurant, a Western restaurant, a hotel, a movie theater, and a leisure land.

The map leaf management table 50 is a reference map leaf management piece 5 for managing map data of a small scale, that is, a small area.
0A, a middle map leaf management piece 50B for managing map data of medium scale, that is, a middle area, and a top map leaf management piece 50 managing map data of a large scale, that is, wide area.
And C. Further, the reference map leaf management piece 50A has a plurality of map display units 53A, ...
53A corresponds, the middle map leaf management piece 50B corresponds to a plurality of map display units 53B, ..., 53B, and the top map leaf management piece 50C corresponds to a plurality of map display units 5B.
3C, ..., 53C correspond. This makes the CPU 7
Refers to a plurality of map display units as needed based on the management pieces 50A, 50B, 50C, transfers various data to the RAM 9 and the buffer memory 15, and performs various displays such as map screen display.

FIG. 3 shows the data structure in the map display unit data, and shows the structure of the map display unit data 53A as an example. Other unit data 5
3B and 53C also have the same structure. The map display unit data 53A includes palette data 60 as color data for performing map display in color, image data 61 that is an image of a map screen, character code data 62 displayed on the map screen, and each service. A service link data group 63, which is an address table showing a storage address of the service information on the CD-ROM disk DK, is provided in order to provide service information indicating the service content provided by the facility.

The service link data group 63 includes service type code data 65 different for each provided service such as leisure facilities, accommodation facilities, restaurants, etc., position data 66 indicating the location of each facility, and name data 67 of each facility.
And a detailed data pointer 68 which is an address table showing the storage address of the service detailed data of each facility on the CD-ROM disc DK, and a CD-ROM disc DK of the explanation voice data for explaining the outline of each facility by voice.
The explanation voice data pointer 69, which is an address table indicating the above storage address, is provided.

CD-indicated by detailed data pointer 68
Service detailed data 80 for each facility as shown in FIG. 4 is stored at the storage address on the ROM disk DK.

The service detailed data 80 includes palette data 81 as color data which constitutes photo data of each facility, image data 82 which constitutes photo data,
Overwrite character data 83 corresponding to characters (for example, facility name) to be overwritten on the display screen of the display 17,
And a description voice data pointer 84 indicating an address on the CD-ROM disk DK in which voice data for performing a detailed description of the facility by voice is stored. Here, the photograph data is image data such as an exterior photograph of each facility, an interior photograph showing the interior, a recommended menu photograph of a restaurant or the like.

Next, the GPS receiver 4 will be described with reference to FIG. In the GPS receiver 4, the GPS antenna 4A has a G via the preamplifier 31 and the bandpass filter 32.
A crystal oscillator 35 that is connected to the PS receiver 40 and outputs a reference frequency signal that is a timing control signal for the entire device.
A clock oscillation circuit 36 that generates a clock signal based on a reference frequency signal; a signal processing unit 37 that performs various signal processing using the clock signal as an operation timing signal; and GPS data based on the output signal of the signal processing unit 37. And an arithmetic unit 38 for generating and outputting.

The GPS receiving unit 40 produces a signal having the same pattern as the data concerning the signal carrier of the GPS satellite, the position of the GPS satellite and the state of the clock in the GPS satellite based on the reference frequency signal, and a clock synthesizing circuit 41. A code generation circuit 42 for generating and outputting a code signal having the same pattern as the distance measurement signal from the GPS satellite based on the above, and a clock and GPS in the GPS satellite based on the output signals of the frequency synthesis circuit 41 and the code generation circuit 42. A data and carrier wave detector 43 for correlating and detecting data relating to the satellite orbit and a carrier wave; and a code lock detector 44 for correlating and detecting the ranging signal by the code signal,
Is equipped with.

Next, the operation of the vehicle-mounted navigation system will be described with reference to the drawings. When the azimuth data, the angular velocity data, the mileage data and the GPS positioning data are input via the interface unit 6, the system controller 5 calculates the current position data based on the program stored in the ROM 8. In this case, if the positioning accuracy of the GPS positioning data is high, GP
GPS positioning data is used as the current position data without correcting the S positioning data, and if the positioning accuracy of the GPS positioning data is low, the GPS positioning data is corrected using the azimuth data, angular velocity data, mileage data, etc. Or G
Azimuth data, angular velocity data, without using PS positioning data,
The current position data is obtained from the mileage data.

After calculating the current position data, the system controller 5 drives the CD-ROM drive 12,
Various necessary data are transferred from the CD-ROM disk DK to the RAM 9 via the bus line 10. Further CD-
The ROM drive 12 is driven to drive the CD-ROM disc D.
The necessary aerial photograph data is transferred from K to the buffer memory 15. More specifically, the system controller 5 is
Map display unit data 53 corresponding to the current position data
Is searched and the map data pointer 64 is referenced to determine at which address on the CD-ROM disk DK the map data necessary for display is recorded, and the map data is stored in the bus line 10 and the graphic controller 14.
To the buffer memory 15 via.

Subsequently, the CPU 7 performs map matching between the current position data and the map data, and the buffer memory 1
The display data is created by overwriting the data indicating the current position on the map data of No. 5.

Next, the graphic controller 14
The display data is sequentially read from the buffer memory 15 at the drawing timing and displayed on the display 17 via the display controller 16.

FIG. 6 shows a mark (black triangle mark) indicating the current position of the user displayed on the map screen based on the map data and the current position data. The tip of the black triangle indicates the traveling direction of the vehicle, and the circle around the current position mark is a mark indicating a predetermined distance (for example, a radius of 100 m) from the current position of the vehicle.

After that, when the user selects the service menu screen by operating the input device 11, the CP
The U7 displays a service menu screen as shown in FIG. 7 on the display 17 via the graphic controller 14 and the display controller 16. At the same time CP
The U7 transfers the service link data group 63 to a non-volatile area (not shown) of the RAM 9 and creates a display control table indicating whether or not to display each service type code.
The display control table 85 is provided with, for example, a 1-bit area (display flag) corresponding to each service type code as shown in FIG. 8. When the display flag is “1”, display is performed and “0” is displayed. If it is "", it is not displayed.

Here, for example, when the user selects the menu selection display SW1 on the service menu screen, if there is a lower menu screen, the next menu screen corresponding to the selected service type code data is displayed. Is displayed. When there is no further lower menu screen or when all items in the menu are selected, the CPU 7 refers to the service link data group 63 of the RAM 9 and corresponds to the selected service type code data. Set the display flag to "1". More specifically, assuming that the menu selection display SW1 corresponds to the museum and the service of the museum, by selecting the menu selection display SW1, the menu screen for selecting either the museum or the museum is displayed. Then, when the user selects a museum, the display flag of the museum is set to "1".

When the selection of the presence / absence of the display is completed in this way, the CPU 7 refers to the position data 66 based on the service type code corresponding to the museum and exists in the display screen of the display 17. Display a guide mark at the position corresponding to the location of the museum. As a result, the display screen of the display 17 becomes as shown in FIG. 9, and the guide mark is displayed only at the position corresponding to the location of the museum.

As described above, according to this embodiment,
Since the user can display only the necessary facility information on the map screen, a large amount of information is not displayed at one time on the display screen, and the user can easily obtain the necessary information.

In the above embodiments, only the in-vehicle navigation system has been described, but the present invention can be applied to navigation systems for other moving bodies such as people, ships and airplanes. Further, although only the GPS navigation system has been described in the above embodiments, the present invention can be applied to a self-contained navigation system.

[0032]

According to the present invention, the type of facility to be displayed on the map screen (for example, Japanese restaurant, Western restaurant, theater, etc.) is stored as display type data based on an input from the outside, and this display is performed. Based on the type data, the guide mark display control means reads the location data (for example, latitude and longitude) corresponding to the facility belonging to the type to be displayed from the first storage means, and uses the read location data and guide mark data as read. The guide mark is displayed at a position corresponding to the location on the map screen of the display, so only the guide mark necessary for the user is displayed on the display, which causes an unnecessarily large amount of information to be displayed. The desired information can be easily obtained without making it difficult to see.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an exemplary embodiment of the present invention.

FIG. 2 is a diagram (1) illustrating a data storage state in a CD-ROM disc.

FIG. 3 is a diagram (2) illustrating a data storage state in a CD-ROM disc.

FIG. 4 is a diagram (3) illustrating a data storage state in a CD-ROM disc.

FIG. 5 is a block diagram showing a configuration of a GPS receiver.

FIG. 6 is a diagram (1) illustrating a display state according to the embodiment of the present invention.
Is.

FIG. 7 is a diagram illustrating a display state of a menu display screen according to the embodiment of this invention.

FIG. 8 is a diagram illustrating a configuration of a display control table.

FIG. 9 is a diagram (2) illustrating a display state according to the embodiment of the present invention.
Is.

[Explanation of symbols]

 1 ... Geomagnetic sensor 2 ... Angular velocity sensor 3 ... Running distance sensor 4 ... GPS receiver 5 ... System controller 6 ... Interface section 7 ... CPU 8 ... ROM 9 ... RAM 10 ... Bus line 11 ... Input device 12 ... CD-ROM drive 13 ... Display unit 14 ... Graphic controller 15 ... Buffer memory 16 ... Display control unit 17 ... Display 18 ... Audio reproduction unit 19 ... D / A converter 20 ... Amplifier 21 ... Speaker 50 ... Figure leaf management table 50A ... Reference figure leaf management piece 50B ... Middle map leaf management piece 50C ... Top map leaf management piece 51 ... Guide mark external character code group 52 ... Kanji font data 53A, 53B, 53C ... Map display unit data 60 ... Palette data 61 ... Image data 62 ... Character code data 63 ... Service link data group 65 ... Service type code data 66 ... Position data 67 ... Name data 68 ... Detailed data pointer 69 ... Explanation voice data pointer 80 ... Service detailed data 81 ... Palette data 82 ... Photo image data 83 ... Overwrite character data 84 ... Description Voice data pointer 85 ... Display control table 100 ... In-vehicle navigation system

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Nobe Inventor Kenichi Nobe 1 Nishimachi 25, Yamada, Kawagoe City, Saitama 1 Pioneer Co., Ltd. Kawagoe Factory

Claims (1)

[Claims] 1. A navigation system for performing map matching based on current position data obtained by positioning the current position of the user and map data stored in advance, and displaying the current position of the user on a map screen of a display. On the map screen based on an input from the outside, location data indicating the location of each facility, type data indicating the type to which the facility belongs, and guide marks corresponding to the type data. Second storage means for storing the type of facility to be displayed as display type data, and reading out the location data corresponding to the facility belonging to the type to be displayed from the first storage means based on the display type data, The guide mark is displayed on the map screen of the display based on the location data and the guide mark data. A navigation system comprising: a guide mark display control means for displaying at a position corresponding to the above location.