JPH09210715A - Navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation device by which a desired destination can be easily retrieved by changing a retrieval condition of the desired destination in stages. SOLUTION: Names of each street in a zip code area in accordance with input zip codes RDN are read and output from CD-ROM (step SE1 and SE2). The shape of a street selected from the street names is shown and output (step SE4-SE7). A spot designated by a mouse cursor becomes a destination (step SE8 and SE9). The names of each facility in the zip code area in accordance with the input zip codes RDN (step SB1) and input institution type (step SF4) are read and output from CD-ROM (step SF5 and SF6). The position of the institution selected from its name is show and output (step SF7 and SF9). The spot designated by the mouse cursor becomes the destination (step SF8).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device which guides a moving body to a destination satisfactorily, and more particularly to a navigation device which can more easily set a destination.

[0002]

2. Description of the Related Art In a navigation system, the distance from each satellite is measured by microwaves transmitted from a plurality of orbiting satellites that orbit the earth. From the distance to each satellite, the current location such as latitude, longitude and altitude of the vehicle (moving body) equipped with the navigation device is calculated. Further, the navigation device has a CD-ROM as an information recording medium.
(Compact Disc Read Only M
memory) is provided. Road information of a predetermined range is stored in this CD-ROM. A road map is formed on the screen of the navigation device based on this road information.

Using the displayed road map, the operator inputs the destination and destination to the navigation device. The navigation device uses the road information in the CD-ROM to find the route from the current position of the vehicle to the destination. Then, while the own vehicle is moving, various information is provided to the operator by various notifying means (voice, visual, etc.) (see the specification and drawings of JP-A-2-3899). As a result, the moving body (vehicle or the like) can be moved well from the current position to the destination.

The setting of the destination in such a navigation device is performed as follows. For example, a map around the destination is manually displayed on the screen of the navigation device, and the map is used to input the destination.
That is, the mouse cursor is superimposed and displayed on the map displayed on the screen of the navigation device. This cursor can be moved freely by the operator. Then, the cursor is moved to a desired position on the map and an arbitrary point on the screen is designated. The actual geographical coordinates of this designated point are calculated by the navigation device. As a result, the destination is input to the navigation device. Alternatively, a desired facility is selected from various facility lists stored in the CD-ROM based on index information such as telephone numbers and addresses, and a destination is set.

[0005]

As described above, when setting a destination with the conventional navigation device, it is necessary to be familiar with the detailed address of the destination or the telephone number. When the telephone number and detailed address of the destination are unknown, the operator must display a detailed map and the operator must search for the destination on the map. In this case, the map displayed on the navigation device has to be scrolled and searched, and the operation is very troublesome.

The present invention has been made to solve the above problems. An object of the present invention is to provide a navigation device that can easily search for a destination by gradually changing the search conditions for the desired destination.

[0007]

In order to solve the above problems, the present invention uses the following means. That is,
The position, shape and name of the street in each area are stored for each area for all or part of the identification number corresponding to the area. All or part of the postal code or part of the phone number is entered. The area is specified based on the entered number. Further, the street names in this area are read and output.
When a specific street is selected from the output streets, a map including this street is displayed on the screen. When a postal code or other number is entered, the area is specified. When the area is specified, the streets in this area are listed, which facilitates the search for the destination.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS

1. Summary of Embodiments An embodiment according to the present invention described below is a navigation device that searches for a route to an input destination and guides the route according to this route. Street storage means (postal code selection data 50, street list data 55, and street shape data 65 are stored for each area according to a part, which stores the position, shape, and name of the street in each area. -ROM 37), area input means (step SB1) for inputting all or part of the identification number corresponding to the area, and the name of each street in the area according to the data input by the area input means The street reading means (step SE1) for reading out the First street output means (step SE2) for display output and / or voice output, and selection for selecting at least one of the street names displayed and / or voice output by the first street output means. The navigation device is provided with means (step SE4) and second street output means (step SE7) for displaying and outputting the shape of the street selected by the selecting means.

An embodiment according to the present invention described below is a navigation device that searches for a route to an input destination and performs route guidance according to this route, in which all or part of an identification number corresponding to a region is searched. A facility storage unit (postal code selection data 50, facility genre list data 60, and facility list data 70 that stores data relating to facilities in each area corresponding to
D-ROM 37) and area input means (step SB) for inputting all or a part of the identification number corresponding to the area.
1) and facility input means (step SF4) for inputting data limiting the facility stored in the facility storage means,
A facility read-out unit (step SF5) for reading out data relating to each facility in the area according to the data input by the area input unit and the facility input unit, and a display output of the facility read by the facility read-out unit or / And facility output means for outputting voice (step SF
6) and a navigation device.

An embodiment according to the present invention described below is a street storage means for storing the names of a plurality of streets in a navigation device that searches for a route to an input destination and guides the route according to this route. (CD-ROM 37 in which facility list data 70 is stored)
And a street designating means (step S) for designating a part of the plurality of streets stored in the street storage means.
B1), the street reading means (step SH1) for reading at least one street name designated by the street designation means from the street storage means, and the name of each street read by the street reading means. Street output means (step SH2) for outputting or / and outputting voice,
The selection means (step SH3) for selecting at least one of the street names displayed and / or output by the street output means, and the data on the facilities existing in correspondence with the streets, Facility storage means (CD-ROM 37 in which the facility list data 70 is stored) that stores each street, and data relating to the facilities corresponding to the street selected by the selection means among the facilities stored in this facility storage means Facility reading means (step SH5) for reading and facility output means (step S5) for displaying and / or outputting the facility read by the facility reading means.
H6) and a navigation device.

An embodiment according to the present invention described below is a facility storage means for storing data relating to a plurality of facilities in a navigation device for searching a route to an input destination and performing route guidance according to this route. (CD-ROM 37 in which the facility list data 70 is stored) and facility designating means (steps SI1 to 4) for designating a part of the data relating to the plurality of facilities stored in the facility storing means.
And the name of the street that exists corresponding to the above facility,
Street storage means (CD storing the facility list data 70-stored for each facility category or genre)
The ROM 37) and the street reading means (step SI) for reading out the street name according to the classification or genre of the facility designated by the facility designating means from the street names stored in the street storing means.
5) and a street output means (step SI6) for displaying and / or outputting the street name read by the street reading means (step SI6).

2. Overall Circuit Diagram FIG. 1 shows an overall circuit of a navigation device according to the present invention. The central processing unit 1 controls the operation of the entire navigation device. The central processing unit 1 includes a CPU (central processing unit) 2 and a first ROM (Read Only Memory).
y) 3, second ROM 4, first RAM (Random A
access memory 5, second RAM 6, sensor input interface 7, communication interface 8, image processor 9, image memory 10, audio processor 11
And a clock 14. And each CP
The U2 to the clock 14 are connected to each other by the CPU local bus 15, and under the control of the CPU 2, each information data is exchanged between the devices.

The first ROM 3 stores programs for various processes executed by the CPU 2, various parameters required by the programs, and the like according to the respective flowcharts described later. The programs stored in the first ROM 3 include, for example, information display control and voice guidance control. The second ROM 4 stores display graphic data and various general-purpose data. The display graphic data is data required for route guidance and map display displayed on the display 33. The various kinds of general-purpose data are data used for navigation such as voice waveform data obtained by synthesizing guide voice or recording a real voice.

The first RAM 5 stores data input from the outside, various parameters used for calculation, calculation results, navigation programs, and the like. The clock 14 has a counter and a battery backup R
It is composed of AM or EEPROM and outputs time information.

The sensor input interface 7 is an A / D
It is composed of a conversion circuit or a buffer circuit. This sensor input interface 7 is used for the current position detection device 2
0 is connected to each sensor, and sensor data of an analog signal or a digital signal is input. The sensors of the current position detecting device 20 include an absolute direction sensor 21, a relative direction sensor 22, a distance sensor 23, and a vehicle speed sensor 24.

The absolute azimuth sensor 21 is, for example, a geomagnetic sensor, and detects geomagnetism. The absolute azimuth sensor 21 outputs data indicating the north-south direction that is the absolute azimuth. The relative direction sensor 22 is, for example, a steering angle sensor, and the steering angle of the wheel is detected by a gyro device such as an optical fiber gyro or a piezoelectric vibration gyro. Then, the relative angle of the traveling direction of the host vehicle with respect to the absolute azimuth detected by the absolute azimuth sensor 21 is determined by the relative azimuth sensor 22.
Output from The distance sensor 23 is composed of, for example, a counter or the like linked with a mileage meter. From the distance sensor 23, data indicating the traveling distance of the host vehicle is output. The speed sensor 24 is constituted by a counter or the like connected to a speed meter. Data proportional to the traveling speed of the host vehicle is output from the vehicle speed sensor 24.

An I / O data bus 28 is connected to the communication interface 8 of the central processing unit 1. This I /
The GPS of the current position detection device 20 is connected to the O data bus 28.
The receiving device 25, the beacon receiving device 26, and the data receiving device 27 are connected. Further, the touch switch 34 of the input / output device 30, the printer 35, and the information storage section 38 are connected to the I / O data bus 28. That is, the communication interface 8 exchanges various data between each external accessory device and the CPU local bus 15.

The current position detection device 20 outputs data for detecting the current position of the host vehicle. That is,
The absolute azimuth sensor 21 detects the absolute azimuth. The relative azimuth sensor 22 detects the relative azimuth with respect to the absolute azimuth. Further, the traveling distance is detected by the distance sensor 23. The vehicle speed sensor 24 detects the traveling speed of the host vehicle.
With the GPS receiver 25, the GPS (Global P
signal of the positioning system (microwaves from a plurality of earth-orbiting satellites) is received, and position data such as latitude / longitude of the vehicle is detected.

Similarly, the beacon receiving device 26 receives a beacon from an information providing system such as VICS (road traffic information communication system) and outputs the received data or GPS correction data to the I / O data bus 28. To be done. In the data transmitter / receiver 27, a bidirectional current position information providing system or ATIS (traffic information service) using a cell phone, an FM multiplex signal, a telephone line, or the like.
And the like, information about the current position or information about road conditions in the vicinity of the vehicle is transmitted and received. These pieces of information are used as position detection information of the own vehicle or operation assistance information. The beacon receiving device 26 and the data transmitting / receiving device 27 may be omitted.

The input / output device 30 includes a display 33, a transparent touch panel 34, a printer 35 and a speaker 13.
Consists of The display information is displayed on the display 33 during the navigation operation. The touch panel 34 is attached on the screen of the display 33, and a plurality of transparent touch switches are arranged in a plane matrix. From the touch panel 34, information necessary for setting a destination such as a starting point, a destination, and a passing point is input to the navigation device. In the printer 35, the communication interface 8
Various types of information such as maps and facility guides output via the are printed. Each information is transmitted from the speaker 13 to the user by voice. The printer 35 may be omitted.

The display 33 is a CR
A T, liquid crystal display or plasma display capable of displaying an image is used. However, a liquid crystal display with low power consumption, high visibility, and light weight is preferable as the display 33. The image processor 9 connected to the display 33 includes a DRAM (D
dynamic RAM) or dual port DRAM
The image memory 10 is connected. Image data is written to the image memory 10 by the image processor 9. Further, under the control of the image processor 9, data is read from the image memory 10 and an image is displayed on the display 33.

The image processor 9 converts the map data and the character data into display image data according to the drawing command from the CPU 2, and writes the display image data in the image memory 10. At this time, an image around the screen, which is displayed on the display 33 for scrolling the screen, is also formed and simultaneously written into the image memory 10.

The voice processor 11 is connected to the speaker 13. The audio processor 11 is connected to the CPU 2 and the second ROM 4 via the CPU local bus 15. Then, the CPU 2 causes the second ROM
The voice waveform data for guidance voice read from 4 is input to the voice processor 11. The audio waveform data is converted into an analog signal by the audio processor 11 and output from the speaker 13. The audio processor 11 and the image processor 9 are composed of a general-purpose DSP (digital signal processor) or the like.

A CD-ROM 37 is stored in the information storage section 38 connected to the I / O data bus 28. In this CD-ROM 37, data necessary for navigation operation such as road map data is recorded in a nonvolatile manner. The information storage section 38 is provided with a data transmission / reception section 39 for reading the information written in the CD-ROM 37 and outputting it to the I / O data bus 28.

As the information storage device of the present invention, C
In addition to the optical memory such as the D-ROM 37, the following devices may be used. For example, a recording medium such as an IC memory, a semiconductor memory such as an IC memory card, or a magnetic memory such as a magneto-optical disk or a hard disk may be used. In addition,
When the recording medium of the information recording device is changed, the data transmitting / receiving unit 39 is equipped with a data pickup suitable for the changed recording medium. For example, if the recording medium is a hard disk, a core head is provided.

The CD-ROM 37 has map data, intersection data, node data, road data, photograph data, destination data, guidance data, detailed destination data, destination reading data, house shape necessary for navigation operation. Data, other data, programs, etc. are stored. With this program, the navigation operation is executed using the road map data of the CD-ROM 37.
The navigation program is read from the CD-ROM 37 by the data transmitting / receiving unit 39,
It is written in the first RAM 5. Other data include:
There are display guidance data, voice guidance data, simplified guidance route image data, and the like.

As the map data recorded on the CD-ROM 37, one map data having the smallest scale is recorded. Therefore, when a large scale map is displayed on the display 33, this CD-ROM 37
The map data of is displayed in reduced scale. In this case, not only the geographical distance such as each road is reduced, but also the display symbol information such as facilities is thinned out.

3. Postal Code Selection Data 50 FIGS. 2 to 7 show the structures of various data recorded in the CD-ROM 37. In FIG. 2, the postal code selection data 50 is shown. This postal code data 5
0 is zip code RDN, street list address L
A, size LD, facility genre list address NA, size ND, representative point east longitude coordinate PEO, representative point north latitude coordinate PN
O and an area shape data address EA.
One postal code RDN specifies one local area. The storage address of the CD-ROM 37 for various data relating to the specified area is designated by the street list address LA, the facility genre list address NA, and the like.

The storage start address where each street list is recorded and the memory size are designated by the street list address LA and the size LD. Similarly, the storage start address and the memory size where the genre list to which each facility belongs are recorded are identified by the facility genre list address NA and the size ND. The genre refers to stations, museums, golf courses, bookstores, pharmacies, restaurants, etc., public facilities of such facilities, transportation facilities, sports and leisure facilities, shopping facilities, etc., classification of destinations or stopovers, fields, Indicates the type, purpose, use or business (sales) content.

The representative point east longitude coordinate PEO and the representative point north latitude coordinate PNO represent the approximate center of the area corresponding to the postal code RDN. When the map data of the CD-ROM 37 is displayed on the display 33, the geographical coordinate designated by the representative point east longitude coordinate PEO and the representative point north latitude coordinate PNO is almost at the center of the display 33. As a result, the designated postal code area is accurately displayed in the center of the display 33. That is, the map data of the postal code area is displayed so as not to shift to the center in the display 33 by the representative point east longitude coordinate PEO and the representative point north latitude coordinate PNO. Depending on the display scale, part of the edge of the area may be cut.

The storage start address and memory size of the CD-ROM 37 for specifying the outer shape of the designated area of the postal code RDN are designated by the area shape data address EA and the size ED. Specifically, the latitude data and longitude data (geographical coordinates) at multiple points on the outer edge of the area are
It is recorded from the memory address specified by the address EA. One zip code area is specified in the map corresponding to the map data of the CD-ROM 37 by the latitudes and longitudes (geographical coordinates) of the plurality of places. Then, if all of the latitude and longitude are within the display 33, the designated postal code area is displayed without cutting the end.

As described above, the postal code selection data 50 includes the postal code RDN, street list address LA, facility genre list address NA, representative point east longitude coordinate PEO, representative point north latitude coordinate PNO, and area shape data address EA.
Is a data group in which is a unit. Therefore, if the postal code RDN is specified, one area is the CD-ROM 3
7 map data.

Therefore, the designated zip code (telephone number) area is displayed in the approximate center of the display output means based on the representative point data of this area, and the optimum display scale is selected based on the shape data of the area. Then, the end is displayed on the display output means without being cut off.

The representative point east longitude coordinate and the representative point north latitude coordinate may be selected by a part (upper part) of the postal code and the telephone number. That is, by inputting a part of the postal code and the telephone number, an area corresponding to the input part of the postal code and the telephone number is specified. For example, when only the upper two digits “12” of the three-digit postal code “123” is input, the area corresponding to the uppermost “12” of the input postal code may be displayed and output. Further, like the postal code and the telephone number, an identification number may be given for each area that is distinguished, classified or divided according to a predetermined condition. For example, numbers or symbols by province, city, town or village, numbers or symbols by state,
It is a number or symbol for each time zone, a number or symbol for each country of the European Community.

4. Street List Data 55 FIG. 3 shows the data structure of the street list data 55. The street list data 55 is composed of group data of the number of streets SS (m), and is stored from the head address indicated by the street list address LA. One street list data 55 includes a street name SSN, a display representative point east longitude coordinate SEO, a display representative point north latitude coordinate SNO, a shape data address SEA, and a size SED.

The street name SSN represents the name of the m-th street. The street name may include a national road name (national road number), a local road name (local road number), or a highway name (highway number). The display representative point east longitude coordinate SEO and the display representative point north latitude coordinate SNO indicate the longitude and latitude (geographic coordinates) of the representative point of this street. The representative point is the center point of the street, but may be the northeast end or the southwest end, or the northwest end or the southeast end.

Shape data address SEA and size SE
By D, the storage start address and the memory area of the geographic coordinate data of each node on this street are designated. The outer shape of this street is identified by the geographic coordinate data of each node. These display representative points east longitude SE
A graphic of the street designated by the street name SSN is displayed on the display 33 by using O, the display representative point north latitude coordinate SNO, and the geographic coordinate data of each node.

When one street extends over a plurality of zip code areas, the street list data 55 of this street is stored for each zip code area, each street name SSN is the same, and the display representative point east longitude coordinate SEO, The display representative point north latitude coordinate SNO, the shape data address SEA, and the size SED are different.

5. Facility Genre List Data 60 FIG. 4 shows a data structure of the facility genre list data 60. The facility genre list data 60 is composed of NC (k) data groups of facility genres. One piece of facility genre list data 60 is composed of a facility genre name NM, a facility list address NLA, and a size SED. Facility genre name NM is
Indicates the name of the genre.

The list data of the facilities belonging to this genre is stored in the memory area designated by the size NLD from the memory start address designated by the facility list address NLA. Thus, the data read from the memory specified by the facility list address NLA and the size NLD identifies the geographical coordinates of each facility belonging to the facility genre name NM and the facility-specific name.

6. Street Shape Data 65 FIG. 5 shows the data structure of the street shape data 65. The street shape data 65 includes the number of nodes ES
It consists of (t) data groups. One street shape data 65 includes an east longitude coordinate EEO and a north latitude coordinate EN
O, an address ENO, and a street name SSN. C by east longitude coordinate EEO and north latitude coordinate ENO
The geographical position of the node in the map data of the D-ROM 37 is determined. The address ENO indicates the address data of the address of this node. When the street is displayed on the display 33, the address ENO is displayed along the street (node), whereby the address along the street is identified.

The street name SSN represents the name of a street (guidance target road) which this facility is in contact with or in the vicinity. Therefore, when a plurality of streets (guide target roads) exist around the facility, a plurality of street names SSN are stored in one facility data.
The street name SSN is the same as the street name SSN of the street list data 55 shown in FIG. The guidance target road means a road searched in a route search process described later.

6. Facility List Data 70 FIG. 6 shows a data structure of the facility list data 70. The facility list data 70 is composed of a data group of the number IS (u) of facilities. The facility list data 70 represents a plurality of facilities belonging to one genre of the one facility genre list data 60 shown in FIG.

One facility list data 70 is composed of a facility name IM, east longitude coordinate IEO, north latitude coordinate INO, and address IB. The facility name IM is a unique name of the facility. The east longitude coordinate IEO and the north latitude coordinate INO indicate the longitude and latitude (geographical position) of this facility. The location on the map of this facility is specified by the east longitude coordinate IEO and the north latitude coordinate INO. The address IB indicates the address of the address.

7. Area Shape Data 75 FIG. 7 shows a data structure of a data string of the area shape data 75. The area shape data 75 indicates the outer edge of the postal code area on the map as described above, and specifies the area range. That is, the geographical range of the area is specified by a plurality of nodes. One area shape data 75 is the longitude and latitude, that is, the east longitude coordinate AE.
It consists of O and the north latitude coordinate ANO. Also, the node number data A
NC (v) indicates the number of nodes.

8. Data Content of First RAM 5 FIG. 8 shows a part of a data group stored in the first RAM 5. The program recorded and stored in the CD-ROM 37 is copied to the program area PL. The current position data MP is data representing the current position of the vehicle detected by the current position detection device 20. The absolute azimuth data ZD is data indicating the north-south direction, which is obtained based on the information from the absolute azimuth sensor 21. The relative azimuth data Dθ is the absolute azimuth data ZD indicating the traveling direction of the host vehicle, which is obtained based on the information from the relative azimuth sensor 22.
The angle data is for

The traveling distance data ML is the traveling distance of the own vehicle and is obtained based on the data from the distance sensor 23. The current position information PI is data relating to the current position, and is stored in the beacon receiving device 26 or the data transmitting / receiving device 2.
Input from 7. The VICS data VD and the ATIS data AD are data input from the beacon receiving device 26 or the data transmitting / receiving device 27. Using the VICS data VD, the error correction of the own vehicle position detected by the GPS receiver 25 is executed. In addition, the local traffic regulation and traffic congestion are determined based on the ATIS data AD.

The registered destination data TP stores data related to the destination such as the coordinate position and the name of the destination registered by the user. The registered destination data TP
The data includes data defining a final destination designated by final guidance point data ED, which will be described later, and data regarding a stop-by place to drop in on the way to the final destination. In the guidance start point data SP, map coordinate data of a point where the navigation operation is started is stored. Similarly, the final guide point data ED stores the map coordinate data of the point where the navigation operation ends.

The node coordinates on the guide road closest to the current position of the vehicle are used as the guidance start point data SP. The reason why the guidance start point data SP is stored is that the current position of the host vehicle according to the current position data MP is, for example, on the premises such as a golf course or a parking lot, and is not necessarily on the guide road. . Similarly, the guidance end point data ED is also registered destination data TP.
The node coordinates on the guide road closest to is stored.
The reason why the guidance final point data ED is stored is that the coordinates of the registered destination data TP may not be on the guidance road.

The guide route data MW stored in the first RAM 5 is data indicating an optimum route to the destination or a recommended route, and is obtained by the route search process in step SA4 described later. Each road in the road map stored in the CD-ROM 37 is assigned a unique road number. The guide route data MW is a row of the road number group from the guide start point data SP to the final guide point data ED.

The mode set data MD is data used in a destination setting process described later. The mode set data MD is set by a touch switch 34 laminated on the display 33. The mode contents displayed on the display 33 are selected by the mode set data MD.

9. Overall Process FIG. 9 shows a flowchart of the overall process of the navigation device executed by the CPU 2. This process
It starts when the power is turned on and is forcibly ended when the power is turned off. The turning on and off of the power is executed when the power of the navigation device itself is turned on and off, or when the engine start key (ignition switch) of the vehicle is turned on and off.

The initialization process of step SA1 in FIG. 9 is as follows. First, the CD-R
The navigation program is read from the OM 37 and copied in the program area PL of the first RAM 5.
Then, the program in the program area PL is executed. Further, the CPU 2 clears the data in each RAM such as the first RAM 5 and the image memory 10.

Then, the current position processing (step SA
2), destination setting processing (step SA3), route search processing (step SA4), guidance / display processing (step SA3)
5) and other processing (step SA6) are cyclically executed.

In the current position processing (step SA2), the geographical coordinates (latitude, longitude and altitude) of the vehicle loaded with the navigation device are detected. In other words, GP
The S receiver 25 receives signals from a plurality of satellites orbiting the earth. From the radio waves from each satellite, the coordinate position of each satellite, the radio wave transmission time at the satellite, and the radio wave reception time at the GPS receiver 25 are detected. From these information, the distance to each satellite is obtained by calculation. The coordinate position of the own vehicle is calculated from the distance to each satellite, and the current position of the own vehicle is acquired. The obtained coordinate position of the own vehicle is stored in the first RAM 5 as the current position data MP. The current position data MP may be corrected by information input from the beacon receiving device 26 or the data receiving device 27.

In the current position process (step SA2), the absolute azimuth data ZD and the relative azimuth data Dθ are set.
And the travel distance data ML are obtained using the absolute direction sensor 21, the relative direction sensor 22, and the distance sensor 23. From the absolute azimuth data ZD, the relative azimuth data Dθ, and the traveling distance data ML, an arithmetic process for specifying the own vehicle position is performed. The own vehicle position obtained by this arithmetic processing is collated with the map data stored in the CD-ROM 37, and is corrected so that the current position on the map screen is accurately displayed. By this correction process,
Even when GPS signals cannot be received in a tunnel or the like, the current position of the host vehicle can be accurately obtained.

Destination setting process in FIG. 9 (step S
In A3), the geographical coordinates of the destination desired by the user are set as the registered destination data TP, as described later. Note that this destination may include a stop-by place if necessary. For example, on the road map or the residential map displayed on the display 33, the coordinate position is designated by the user. Or display 3
From the itemized list of destinations displayed in 3, the destination is specified by the user. When the destination designation operation is performed by the user, the central processing unit 1 stores the information data such as the geographical coordinates of the destination in the first RAM 5 as the registered destination data TP. The information data such as the coordinates of the destination also includes a stop-by place or the like that stops in the middle of the destination.

Route search processing in FIG. 9 (step SA
In 4), the optimum route from the guidance start point data SP to the final guidance point data ED via the set stop-by point is searched. The optimum route here is, for example, a route that can reach the destination in the shortest time or the shortest distance. Or if you use the highway,
A route that can reach the destination in the shortest time or the shortest distance using the expressway. The same data as the current position data MP is set in the guidance start point data SP, or the node data of the guidance target road close to the current position data MP is set. When the current traveling position of the host vehicle deviates from the guidance route, the optimum route from the deviated current position to the final guidance point via the stop-by place is automatically searched again.

Guide / display processing in FIG. 9 (step S
In A5), the guide route obtained in the route search process (step SA4) is displayed on the display 33 centering on the current position of the vehicle. The guide route displayed on the display 33 is displayed together with the map screen. Further, according to this guide route, the guide information is audibly produced from the speaker 13 or the guide information is displayed on the display 33 at any time so that the own vehicle can travel satisfactorily. As the image data for displaying the guide route, road map data around the current position of the CD-ROM 37 or house map data around the current position is used.

Switching between the road map data and the residential map data is performed under the following conditions. For example, a guide point (destination, drop-in place, intersection, etc.) from the current position
Distance, the speed of the host vehicle, the size of the displayable area, the switch operation of the operator, or the like. In addition, guidance points (destinations, stopovers, intersections, etc.)
An enlarged map near the guidance point is displayed on the display 33 in the vicinity. Instead of a road map, the display of the geographical information is omitted, and a simplified guide route image that displays only the minimum necessary information such as the guide route and the direction of the destination or stopover and the current position is displayed. 33 may be displayed.

After the guidance / display processing in step SA5, other processing is executed (step SA6). For example,
It is determined whether or not the traveling route of the host vehicle is along the calculated guide route. If your vehicle reaches its destination,
The route guidance / display processing is completed, and step SA2 is performed again.
The processing is returned to. Alternatively, it is determined whether or not a destination change command is input by the operator's switch operation. Therefore, even if there is a destination change command, the processing is returned to step SA2 and is executed again from the current position processing of the own vehicle. In this manner, the processing from step SA2 to step SA6 is sequentially repeated.

10. Destination Setting Process of First Embodiment (Step SA5) FIGS. 10 to 14 show a flowchart of the first embodiment of the destination setting process executed by the navigation device of the present invention. 10 and 11 are diagrams showing the entire destination setting process (step SA3). First, a display screen for inputting a zip code is displayed on the display 33 (step SB1). An example of this zip code input screen is shown in FIG.

As shown in FIG. 17, on the screen 100, the input numeral display field 102 and the numerals 108 from 0 to 9 are displayed.
And "END" character 110 for selecting that the number input is completed are displayed. Also, a mouse cursor 106 that can freely move within the screen 100 is displayed. This mouse cursor 106 is moved onto each number 108,
When the confirmation input key is pressed, the number is recognized by the navigation device. Note that the confirmation input key is a key switch provided on the navigation device.

The mouse cursor 106 described above or below may be moved by a small joystick, and the confirmation input key may be replaced by a switching mechanism that pushes this joystick. In addition, FIG.
18, 19, and 20, the mouse cursor 106 is not displayed, each display item in the screen 100 is selected by the joystick, and the color in the display frame of the selected display item is changed and selected. May be displayed.

The numerical value input using the display screen of FIG. 17 is used as the postal code RDN. When this postal code RDN is input, this input postal code RDN
Based on, the postal code selection data 50 (see FIG. 2) is CD-
It is retrieved from the ROM 37. That is, from the data group of the postal code selection data 50, one piece of postal code selection data that matches the input postal code RDN is the CD-ROM 3
7 is read.

Next, the item selection screen is displayed on the display 33 (step SB2). A display example of this item selection screen is shown in FIG. As shown in FIG. 18, the characters 118 "representative point map display", "street name input" 120, and "facility name input" 122
Also, the character 124 of "destination setting by another item" is displayed.

Then, the mouse cursor 106 is moved by the operator, and the screen 10 of the mouse cursor 106 is moved.
The position on 0 is acquired (step SB3). That is, the position of the mouse cursor 106 on the screen at the time when the confirm key is pressed is identified by the CPU 2.
Then, the information content displayed at the position of the mouse cursor 106 is processed as being selected. For example, if the enter key is pressed while the mouse cursor 106 is being displayed over the "representative point map display" character 118, this representative point map display processing is selected.

When it is detected in the process of step SB3 that the destination setting by another item is selected, the processes of FIG. 11 and the subsequent steps are passed. That is, the process of setting the destination from the area specified by the postal code is canceled. Therefore, if the decision result in the step SB4 is YES, a destination setting process subroutine based on another item is executed (step SB5). For example, a process of directly selecting a destination from the address of the destination is executed. When the subroutine of step SB5 ends, the process returns to the main flow of FIG.

However, the determination result of step SB4 is NO.
In the case of, the processing from FIG. 11 onward is executed. That is,
In the item selection process in steps SB2 and SB3,
Either the representative point map display process, the street name input process, or the facility name input process is selected. The selection result is stored in the mode set data MD.

Based on the set data of the mode set data MD, the judgments at steps SC1, SC3 and SC5 in FIG. 11 are executed. That is, it is determined whether or not the mode for displaying the representative point map is selected based on the data of the mode set data MD (step SC1). If selected (YE in step SC1)
S), a "representative point map display and destination setting" subroutine is executed (step SC2).

However, if the representative point map mode is not selected or the processing of step SC2 is completed, the determination of the next step SC3 is executed. In step SC3, it is determined whether the mode selection is the street input mode. If the street input mode is selected (YES in step SC3), the "display of street name and destination setting" subroutine is executed (step SC4).

Then, if the "display of street name and destination setting" subroutine is completed or if NO in steps SC1 and SC3, the judgment of step SC5 is executed. That is, it is determined whether or not the genre-specific setting mode is selected. Therefore, if YES at step SC5, the "genre list display and destination setting" subroutine is executed (step SC6).
When the subroutine of this step SC6 is completed or when the result is NO in step SC5, the process is returned to the main flow of FIG. 9 (step SC7).

11. Representative Point Map Display and Destination Setting Subroutine FIG. 12 shows a representative point map display and destination setting subroutine. When the mode selected in steps SB2 and SB3 of FIG. 10 is the representative point map display mode, the subroutine of FIG. 12 is executed. Postal code RD
Postal code selection data 50 designated by N is CD-ROM
It is read from 37. In addition, this postal code RDN is
It is input in step SB1. Further, the area shape data address E recorded in the postal code selection data 50
A, size ED is extracted.

From the memory area designated by the area shape data address EA and the size ED, the east longitude coordinate AEO and the north latitude coordinate ANO (see FIG. 7) of each node defining the outer edge (outer circumference) of the area are sequentially read. And
The maximum and minimum values in the east longitude coordinate AEO of each node are extracted (step SD1). Similarly, the maximum value and the minimum value in the north latitude coordinate ANO of each node are extracted.

Each of these east longitude coordinates AEO and each north latitude coordinate AN
The scale at which the map is displayed on the display 33 is obtained from the maximum and minimum values of O (step SD).
2). As a result, the entire area is properly displayed in the display 33 so that the end of the area of the postal code RDN is not cut off. The geographical range of the designated area of the postal code RDN is defined by the area shape data 75. The map data displayed on the display 33 is a CD.
-It is stored in the ROM 37.

The designated area is displayed in the display 33 at the reduced scale calculated in step SD2 (step SD3). FIG. 21 shows a display example of the designated area with the proper scale. In FIG. 21, the designated area is a range surrounded by a dotted line 156. The bending points 160 and 162 shown in FIG. 21 represent nodes. Further, the symbol 152 represents the current position of the vehicle. Curves 158 and 159 represent roads.
In this step SD3, the shapes of all streets or main streets in the designated area are also displayed. in this case,
The street shape data 65 of each area in FIG. 5 is used.

The process of selecting the proper scale in step SD2 may be omitted, or the proper scale may be selected manually by the operator. When the process of step SD2 is omitted, the area map displayed on the display 33 is the largest enlarged map. Moreover, the representative point east longitude coordinate PEO, the representative point north latitude coordinate PN of the designated area
O (see FIG. 2) is the center of the display 33.

In this way, when the area map is displayed on the display 33, the graphic symbols stored in the second ROM 4 are used to display each facility in the designated area (step SD4). For this display facility, the facility list data 70 of FIG. 6 is used, and a specific symbol is displayed at display coordinates according to the geographical coordinates of this facility. This symbol is a star, circle, triangle, square, fork, cup, bag,
Flags, houses, etc. Note that this facility display may be performed only when the most enlarged area map is displayed on the display 33.

After that, an arbitrary point in the display map area is designated by using the mouse cursor 106 displayed in the display 33. That is, the mouse cursor 106 is moved by the operation of the operator, and the confirm key is pressed. The mouse cursor 106 at the time when this confirmation key is pressed
The display position of is the desired destination of the operator. Therefore, the display position of the mouse cursor 106 at the time when the confirm key is pressed is acquired (step SD5). From the cursor display position, the actual geographic coordinate position is calculated by calculation. The geographical coordinate position obtained by this calculation is stored in the first RAM 5 as registered destination data TP (step SD6).

When the process of step SD6 is completed, the process returns to the main flow of FIG. 9 (step SD
7). The setting of the stop-by place is also performed according to the same procedure as described above. Then, the geographical coordinates of the stop-off place are also written in the registered destination data TP. The geographical coordinates of the stop-off place may be stored in another memory area provided in the first RAM 5.

12. Street Name Display and Destination Setting Subroutine FIG. 13 shows a street name display and destination setting subroutine. The series of processing in FIG. 13 is executed only in the case of YES in step SC3 in FIG.
In FIG. 13, first, all the streets in the area designated by the postal code RDN are read and extracted (step SE1). The listing of all streets is performed using the street list data 55 of FIG. In the street list data 55, street names in the area designated by the postal code RDN are stored. Therefore, by extracting only the street name from the street list data 55, a list of streets is created.

The list of street names listed in step SE1 is displayed on the display 33 (step SE2). If the number of streets SS (m) is large, all the streets cannot be displayed on the display 33 at one time, so that if the screen of the display 33 is scrolled, each street name is displayed. A display example of the street list is shown in FIG. In addition to the street list display, each street name may be notified by voice.

When the street list is displayed in step SE2, the mouse cursor 106 is also displayed on the screen 1 of the display 33.
Displayed above 00. Then, the display position of the mouse cursor 106 at the time when the confirm key is pressed is acquired (step SE3). The display position of the mouse cursor 106 identifies which street is selected (step SE4).

The display representative point east longitude coordinate SEO and the display representative point north latitude coordinate SNO of the street selected in step SE4 are read from the street list data 55 (step SE5). Further, the street shape data 65 of the selected street is read from the CD-ROM 37. The street shape data 65 is composed of the east longitude coordinate EEO and the north latitude coordinate ENO of each node, and determines the shape of this street. Therefore, the maximum value and the minimum value of each of these node east longitude coordinate EEO and each north latitude coordinate ENO are obtained (step SE6).

The calculation of the maximum value and the minimum value of each east longitude and each north latitude of this node coordinate is the same processing as step SD1 in the above area map display. Therefore, the appropriate scale of the map displayed on the display 33 is obtained from the obtained maximum value and minimum value of each east longitude and each north latitude. The street is displayed on the display 33 at the calculated scale (step SE7).
When the street is displayed in this display 33,
Each address associated with this street is displayed together.
Along with this street display, this street name may be notified by voice.

An example of streets displayed on the display 33 is shown in FIG. As shown in this figure, the selected street is displayed as distinct from other roads on the screen 100. In FIG. 22, it is indicated by a thick line 200. On an actual screen, it may be displayed in a characteristic identification color. In addition, the display area 2 provided at the top of the screen 100
In 02, the name of the selected street is displayed by the character 204. Note that the street name SSN of the street list data 55 is used as the display street name. Characters 206 in FIG. 22 represent addresses. For this address display, the data of the address ENO of the street list data 55 is used.

The calculation of the proper scale in step SE7 may be omitted. In this case, the map is displayed so that the street is enlarged most. In addition, the adjustment is performed so that the representative point of the street is substantially at the center of the screen 100. The representative points of this street are the display representative point east longitude coordinate SEO and the display representative point SN in the street list data 55.
Determined by O.

In this way, the street displays the display 33.
When displayed inside, the destination is designated by the mouse cursor 106. Therefore, the position of the mouse cursor 106 on the screen 100 at the time when the confirm key is pressed is detected (step SE8). From the cursor display position, the actual geographic coordinate position is calculated by calculation.
The geographical coordinate position obtained by this calculation is stored in the first RAM 5 as registered destination data TP (step SE9).

When the process of step SE9 is completed, the process returns to the main flow of FIG. 9 (step SE10). The setting of the stop-by place is also performed according to the same procedure as described above. Then, the geographical coordinates of the stop-off place are also written in the registered destination data TP. The geographical coordinates of the stop-by place may be stored in another memory area provided in the first RAM 5. Furthermore, when the street is displayed in step SE7, the entire designated area including this street may be displayed.

13. Genre list display and destination setting subroutine FIG. 14 shows a genre list display and destination setting subroutine. In FIG. 14, first, the genres of each facility in the area designated by the postal code RDN are listed (step SF1). The listing of this genre is performed using the facility genre list data 60 of FIG. The memory area of the CD-ROM 37 of the facility genre list data 60 is designated by the facility genre list address NA and the size ND of the postal code selection data 50.

Next, from the facility genre list data 60, the facility genre number NC (k) facility genre names NM
Is read. Then, the genre list is displayed on the display 33 (step SF2). A screen display example of this genre list is shown in FIG. Thereafter, the display position of the mouse cursor 106 on the screen 100 at the time when the confirm key is pressed is acquired (step SF3).

It is determined that the displayed genre is selected at the position where the cursor 106 is located (step SF4). The facilities belonging to the designated genre are listed (step SF5). This facility is listed up using the facility list data 70 of FIG.
The memory area of the facility list data 70 is designated by the facility list address NLA and the size NLD.
The facility list address NLA and the size NLD are included in the facility genre list data 60. That is, when the genre is specified, the list of facilities belonging to the genre and existing in the designated area is immediately displayed on the CD-ROM 37.
Is read from.

Next, only the facility name IM of the facility list data 70 is extracted and displayed as a list on the display 33 (step SF6). Then, the display position of the mouse cursor 106 on the screen 100 at the time when the confirm key is pressed is acquired (step SF7). The facility at the display position of the cursor 106 is set as the destination (step SF8).

Furthermore, the east longitude coordinate I of this selected facility
The EO and the north latitude coordinate INO are read from the facility list data 70. A map around the designated facility is displayed on the display 33 based on the east longitude coordinate IEO and the north latitude coordinate INO (step SF9). The scale of the map display may be a scale at which the map is displayed at the maximum, or a scale selected by the operator. Further, the name of the facility may be notified by voice along with the display of the map around the specified facility. After the map display of step SF9 is performed, the process is returned to the main flow of FIG. 9 (step SF10).

As described above, in the first embodiment, after the specific area is designated by the postal code RDN, the display 3 is displayed.
The information displayed in 3 is of multiple types (3 types, 3 modes). This makes the search for the destination easier.

14. Second Embodiment FIGS. 15 and 16 are flowcharts of a second embodiment of the present invention. In this embodiment, a specific area is designated by a postal code, a specific street is selected from the streets within the area, facilities around the selected street are listed, and the facility name desired from the listed facility names is selected. The destination is selected. For the contents other than those described here, refer to the description of the first embodiment. The processing of FIGS. 15 and 16 is another embodiment of the subroutine for displaying the street name and setting the destination of FIG. 13 in the first embodiment. Therefore, also in the second embodiment, there is a portion where the same processing as in the first embodiment is executed. That is, the destination setting process of FIGS. 10 and 11, the representative point map display and destination setting subroutine of FIG. 12, and the genre list display and destination setting subroutine of FIG. 14 are executed. Therefore, these FIG.
0, FIG. 11, FIG. 12 and FIG. 14 will be omitted.

In FIG. 15, all the streets within the area designated by the postal code RDN are read and extracted (step SG1). The listing of all streets is performed using the street list data 55 of FIG. In this street list data 55,
All street names in the postal code RDN area are stored. Therefore, only all street names are extracted from this street list data 55, and all streets are listed.

Next, the list of street names listed is displayed on the display 33 (step SG2). If the number of streets SS (m) is large,
Since all the streets cannot be displayed on the display 33 at once, if the screen of the display 33 is scrolled,
Each street name is displayed. In addition to the street list display, each street name may be notified by voice. After this list display, the display position of the mouse cursor 106 at the time when the enter key is pressed is acquired (step SG3). The display position of the mouse cursor 106 identifies which street is selected (step SG4).

Next, a genre list of the designated area is created using the facility genre list data 60 (step SG5). The created genre list is displayed on the display 33 (step SG6). This genre list is displayed in step S in FIG.
The process is the same as F6. Then, the position of the mouse cursor 106 on the screen 100 when the confirm key is pressed is detected (step SG7). This mouse cursor 1
It is determined that the genre of the display position of 06 is selected (step SG8). Based on the selected genre
The facility list data 70 of FIG. 6 is read. That is,
Since the genre is specified, the facility list address NLA and the size N are calculated from the facility genre list data 60 of FIG.
LD is read. The facility list data 70 is stored in the address group designated by the facility list address NLA and the size NLD. The facility list data 70 includes the address IB of each facility.

On the other hand, the street shape data 65 is read by the street name designated in step SG4. The memory area of the street shape data 65 is the shape data address SEA of the street list data 55.
And the size SED. The street shape data 65 stores the address ENO of each node forming the street (see FIG. 5).

Each address ENO of this designated street
And the address IB of each facility in the facility list data 70 are compared. Then, the facility of the address IB having a value close to each address ENO of the street is listed (step SG9). In addition, comparison of address IB and address ENO is
It is determined whether the difference between the address IB and the address ENO is less than or equal to a predetermined value.

The facility names listed in step SG9 are selected from the facility list data 70,
It is displayed on the display 33 (step SG10).
After this, the position of the mouse cursor 106 on the screen 100 at the time of pressing the enter key is detected (step S
G11). The facility at the cursor display position is registered as the destination. That is, the east longitude coordinate IEO and the north latitude coordinate INO of the facility list data 70 are the registered destination data T.
It is stored in the first RAM 5 as P (step SG1
2).

When the processing of this step SG12 is completed, the processing is returned to the main flow of FIG. 9 (step S).
G13). The setting of the stop-by place is also performed according to the same procedure as described above. Then, the geographical coordinates of the stop-off place are also written in the registered destination data TP. The geographical coordinates of the stop-by place may be stored in another memory area provided in the first RAM 5.

Further, by the above step SG12,
After the above facilities are registered as destinations, step SG4
The street selected in step 3 may be displayed on the display 33 centering on the registered destination. Moreover, in this street display, steps SE5 and SE6 in FIG.
As described above, the map may be displayed by requesting an appropriate scale. Alternatively, a maximum enlarged view centered on the designated facility may be displayed. Furthermore, the facility name or street name may be notified by voice in addition to the display of the peripheral map of the specified facility.

As described above, according to this embodiment, first,
The specific area is specified by the postal code. Next, a specific street is selected from the streets in the area. In addition, facilities around the selected street are listed. Finally, a desired destination is selected from the listed facility names. Thereby, the desired destination can be easily searched.

15. Third Embodiment FIG. 23 is a flow chart of the third embodiment of the present invention. In this embodiment, a specific area is designated by a zip code, a specific street is selected from the streets within the area, facilities along the selected street are listed, and a desired purpose is obtained from the listed facility names. The ground is selected. For the contents other than those described here, refer to the description of the first and second embodiments. The processing of FIG. 23 is another embodiment of the subroutine of displaying the street name and setting the destination of FIG. 13 in the first embodiment. Therefore, in the third embodiment, there is a portion where the same processing as in the first embodiment is executed. That is, the destination setting processing of FIGS. 10 and 11, the representative point map display and destination setting subroutine of FIG. 12, and the genre list display and destination setting subroutine of FIG. 14 are also executed in the third embodiment. It Therefore,
Description of these FIGS. 10, 11, 12, and 14 is omitted.

In FIG. 23, all streets within the area designated by the postal code RDN are extracted (step SH1). This list of all streets is
This is performed using the street list data 55 of FIG. In the street list data 55, street names in the area designated by the postal code RDN are stored. Therefore, this street list data 5
Only street names are extracted from 5, and all streets are listed.

Then, the list of the street names listed is displayed on the display 33 (step SH2). If the number of streets SS (m) is large,
Since all the streets cannot be displayed on the display 33 at once, if the screen of the display 33 is scrolled,
Each street name is displayed. In addition to the street list display, each street name may be notified by voice. After this list display, the display position of the mouse cursor 106 at the time when the enter key is pressed is acquired (step SH3). The display position of the mouse cursor 106 identifies which street is selected (step SH4).

Next, the facilities along the street selected in step SH4 are listed (step S
H5). The list of facilities along this street is created as follows. From the street name included in the facility list data 70, the facility name IM having the street name selected in step SH4 is extracted. That is, the facility list data 70 is composed of data on a plurality of facilities that are in one area and belong to one genre. The data regarding this facility also includes the name data of the street where this facility is adjacent or closest (see FIG. 6). Therefore, the facility name IM is reversely searched from the street name in the facility list data 70.

The facility list data 70 is a facility list for each genre. Therefore, when searching a plurality of facilities belonging to one street using this facility list data 70, all facility list data 70 must be searched. If the data storage capacity of the CD-ROM 37 has a margin, the following data file may be created. For example, it is a data file in which the facilities immediately adjacent to the street can be displayed as a list from the street name.

The street list data 55 shown in FIG.
Alternatively, the facility name data I is set for each street data or node data of the street shape data 65 of FIG.
M or facility address data IA may be stored.
In this case, the facility name data IM is the name data of each facility adjacent to each street or each node. The facility address data IA indicates a storage address of data relating to each facility adjacent to each street or each node. A list of the facility name data IM or a list of the facility name data IM searched based on the facility address data IA is executed (steps SH5-6).

Furthermore, this step SH4 and step S
The processing of selecting the genre of the facility in the above steps SF1 to 4 or the following steps SI1 to 4 may be executed with H5. In this case, in the reverse search in step SH5, the reverse search is performed only in the selected one facility genre. Each facility genre having the street name selected in step SH4 is the facility genre list data 70 in FIG. It may be reversely searched from and each facility genre may be displayed in a list. In this case, as described in detail in the next fourth embodiment, the street name data SSN or street address data SA is stored for each facility genre data of the facility genre list data 60 of FIG.

The list of facility names created in step SH5 is displayed on the display 33 (step SH6). The display position of the mouse cursor 106 at the time when the enter key is pressed is acquired (step SH7). The display position of the mouse cursor 106 identifies which facility is selected. Then, based on the selected facility name, the east longitude coordinate IEO and the north latitude coordinate INO of the facility list data 70 are registered as registration destination data TP (step SH8).

When the processing of this step SH8 is completed, the processing is returned to the main flow of FIG. 9 (step S
H9). The setting of the stop-by place is also performed according to the same procedure as described above. Then, the geographical coordinates of the stop-off place are also written in the registered destination data TP. The geographical coordinates of the stop-by place may be stored in another memory area provided in the first RAM 5.

Instead of displaying the facility name list in step SH6, the following means may be used. That is, the selected street is displayed on the display 3
3 top is displayed. Further, each facility along the street is displayed on the display 33 by a graphic symbol accompanied by the facility name. After that, the graphic symbol on the screen designated by the mouse cursor 106 is registered as the destination facility.
In this way, the destination is set while visually checking the position on the map, and the navigation device becomes more convenient.

Further, when the facility list is displayed in step SH6, each facility name may be notified by voice.
Furthermore, when one facility is specified as the destination in step SH8, the facility name may be notified by voice.

As described above, according to this embodiment, first,
The specific area is specified by the postal code. Next, a specific street is selected from the streets in the area. In addition, facilities along the selected street are listed. Finally, a desired destination is selected from the listed facility names. Therefore, the desired destination can be easily retrieved.

16. Fourth Embodiment FIGS. 24 and 25 are flowcharts of a fourth embodiment of the present invention. In the present embodiment, a specific area is designated by the postal code RDN, the genre of the facility in this designated area is displayed on the display 33, the street name of the facility in this designated genre is displayed, and based on this street name. Facilities are selected. For the contents other than those described here, refer to the descriptions of the first, second, and third embodiments. The processing of FIG. 23 is another embodiment of the genre list display and destination setting subroutine of FIG. 14 in the first embodiment. Therefore, in the fourth embodiment,
There is a part where the same processing as in the first embodiment is executed. That is, the destination setting process of FIG. 10 and FIG.
Figure 1 representative point map display and destination setting subroutine
The display of the street name 3 and the destination setting subroutine are also executed in the fourth embodiment. Therefore, description of these FIGS. 10, 11, 12, and 13 is omitted.

In FIG. 24, first, the postal code RDN
The genres of each facility in the area designated by are listed up (step SI1). The list of genres is performed using the facility genre list data 60 of FIG. The memory area of the facility genre list data 60 is designated by the facility genre list address NA and the size ND of the postal code selection data 50.

That is, the facility genre list data 60
To facility genre number NC (k) facility genre name N
M is read. Then, the genre list is displayed on the display 33 (step SI2). A screen display example of this genre list is shown in FIG. Thereafter, the display position of the mouse cursor 106 on the screen 100 at the time when the confirm key is pressed is acquired (step SI3).

It is determined that the genre displayed at the position of the cursor 106 has been selected (step SI4). Each facility data belonging to the designated genre is read as facility list data 70. Then, only the street name SSN included in the facility list data 70 is listed (step SI
5).

The facility genre list data 6 shown in FIG.
The street name data SSN or the street address data SA may be stored for each facility genre data or facility data of the facility list data 70 of FIG. In this case, street name data SSN
Is name data of each facility genre or each street adjacent to each facility. The street address data SA indicates a storage address of data relating to each facility genre or each street adjacent to each facility. The street name data SSN are listed or the street name data SSN searched based on the street address data SA are listed (steps SI5 to SI6).

Then, the list of the listed street names is displayed on the display 33 (step SI6). Then, the display position of the mouse cursor 106 on the screen 100 at the time when the confirm key is pressed is acquired (step SI7). As a result, the street at the display position of the cursor 106 is selected (step SI8).

By the way, there may be a plurality of facilities belonging to the same genre on one street. Therefore, when street selection is performed in step SI8, the name IM of each facility having the same street name is extracted based on the facility list data 70 (step SI9).

Then, the list created in step SI9 is displayed on the display 33 (step SI1).
0). Instead of this list display, step SI9
Each facility listed in may be displayed on the map.
That is, the street graphic is displayed in the display 33. Furthermore, along this street, step SI
The facility extracted in 9 is displayed in the display 33 by a graphic symbol with a name. In this way, the location of the facility on the map can be easily confirmed.

In step SI10, after the facility list is displayed, the display position of the mouse cursor 106 at the time when the enter key is pressed is acquired (step SI1).
1). The display position of the mouse cursor 106 identifies which facility is selected. Then, based on the selected facility name, the east longitude coordinate IEO and the north latitude coordinate INO of the facility list data 70 are registered as registration destination data TP (step SI2). This step SI
After the destination registration by 12 is performed, the process is returned to the main flow of FIG. 9 (step SI13).

As described above, in the fourth embodiment, first, the specific area is designated by the postal code RDN. After that, the genre of the designated area is displayed on the display 33.
Next, the street name where each facility of the specified same genre is located is displayed. Then, the facility is selected based on the street name. Therefore, when setting the destination, it is possible to search in the order of region, genre, and street, and the search on the map becomes quicker.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, when the street is selected in step SE4 of FIG. 13, the street list is displayed in the display 33 as shown in FIG. 19, but this may be done as follows. That is, as shown in FIG. 21, the area is displayed in the display 33 and the street names are
It is displayed together on the screen. Then, when any geographical coordinate on the display area is selected by the mouse cursor 106, an enlarged view centering on the selected portion is immediately displayed. At the time of displaying the enlarged view, facilities within the displayable range of the display 33 are also displayed at the same time. This allows the operator to search for a facility along a specific street in a specific area while looking at the map.

Further, in each of the above-mentioned embodiments, the area is designated by the postal code, but the postal code can be replaced with the whole or a part of the higher order telephone number.
That is, an area can be designated only by the area code, or the area can be designated by using the area code and the first several digits of the remaining telephone numbers excluding the area code. Further, the postal code to be input may be a part of the upper part or all.

Further, in the above step SD3 or SD4
After the above steps SE1, SF1, SG1, SH1
Alternatively, you may jump to SI1. As a result, a list of streets or a figure or a list or location of facilities in the displayed area is displayed and / or output as audio. In addition, the above steps SE2, SG2, SH
2, the process of step SD3 may be executed in SI6, and the process of steps SF6, SH6, SG10, SI may be executed.
Alternatively, the processing of step SD4 may be executed at 10 or in addition to 10. Thereby, the figure of the street in the designated area or the position of the facility in the designated area is displayed. The order of step SF9 and step SF8 may be exchanged.

Further, the above-mentioned steps SB3 and SD
5, SE3, SE8, SF3, SF7, SG3, SG
7, SG11, SH3, SH7, SI3, SI7, SI
The selection process in 11 may be executed by a voice from the operator. In this case, a desired item is selected from the list output and / or output by voice, and this item is sounded by the operator.

In each of the above embodiments, the postal code RDN
A search process for a destination or a stopover location based on the input is performed before the route search process (step SA4).
However, these destination or drop-in search processes
It may be performed during the guidance / display processing in step SA5. In other words, a new stopover or destination is set in the middle of the guide route by interruption. However, these operations are performed when the host vehicle is stopped. As a result, the setting of the destination or the stopover location can be easily changed.

Further, in each of the above embodiments, the navigation program is read from the CD-ROM 37, written in the first RAM 5, and executed by the CPU 2. This program is stored in advance in the first ROM 3 as in the conventional case, and is stored in any CD-ROM 37
However, navigation processing such as route search may be executed by the same program.

However, as in the above embodiments, the CD-R
When the latest program is loaded from the OM 37 to the first RAM 5, the following advantages are obtained. CD-R
When the data construction method of the road map data of the OM 37 is changed in the future, the program is also changed, so that the newly constructed data is used more efficiently and the navigation operation becomes more optimal.

Furthermore, the type of the first RAM 5 may be a dynamic RAM, a static RAM, or a readable / writable RAM such as a memory card. In addition, in the current position detecting device 20, the GPS receiving device 2
5, one or two of the beacon receiving device 26 and the data receiving device 27 may be omitted. The printer 35 can also be omitted.

[0136]

As described above in detail, the present invention has the effect that the destination search condition can be narrowed down step by step, so that the destination can be searched more easily.
Especially when the address of the desired destination is not clearly understood,
The effect that the destination can be searched based on only the number that identifies the area is produced.

[Brief description of drawings]

FIG. 1 is a diagram showing an entire circuit of a navigation device according to the present invention.

FIG. 2 is a diagram showing postal code selection data 50 read from a CD-ROM 37.

FIG. 3 is a diagram showing the contents of street list data 55.

FIG. 4 is a diagram showing the contents of facility genre list data 60.

5 is a diagram showing the contents of street shape data 65. FIG.

6 is a diagram showing the contents of facility list data 70. FIG.

7 is a diagram showing the contents of area shape data 75. FIG.

FIG. 8 is a diagram showing data stored in the first RAM 5.

FIG. 9 is a diagram showing a main flowchart.

FIG. 10 is a flowchart of a destination setting process.

FIG. 11 is a flowchart of a destination setting process.

FIG. 12 is a flowchart of representative point map display and destination setting processing.

FIG. 13 is a flowchart of a street name display and destination setting process.

FIG. 14 is a flowchart of genre list display and destination setting processing.

FIG. 15 is a flowchart of a street name display and destination setting process in the second embodiment.

FIG. 16 is a flowchart of a street name display and destination setting process in the second embodiment.

FIG. 17 is a diagram of a zip code RDN input screen.

FIG. 18 is a display diagram of an item selection screen.

FIG. 19 is a diagram of a street list display screen.

FIG. 20 is a diagram of a genre list display screen.

FIG. 21 is a diagram of an area display screen.

FIG. 22 is a diagram of a street display screen.

FIG. 23 is a flowchart of the third embodiment of the present invention.

FIG. 24 is a flowchart of the fourth embodiment of the present invention.

FIG. 25 is a flowchart of the fourth embodiment of the present invention.

[Explanation of symbols]

1 ... Central processing unit, 2 ... CPU, 3 ... First ROM, 4 ... Second ROM, 5 ... First RAM, 7 ... Sensor input interface, 8 ... Communication interface, 9 ... Image processor, 10 ... Image memory, 11 ... Voice processor , 13 ...
Speaker, 20: current position detecting device, 21: absolute direction sensor, 22: relative direction sensor, 23: distance sensor, 24
... vehicle speed sensor, 37 ... CD-ROM, 39 ... data transmission / reception section.

Claims (12)

[Claims] 1. Search for a route to an input destination,
In a navigation device that provides route guidance in accordance with this route, a street memory that stores, for each area, the position, shape, and name of the street in each area for each area corresponding to all or part of the identification number corresponding to the area Means, area input means for inputting all or a part of the identification number corresponding to the area, and street reading means for reading the name of each street in the area according to the data input by the area input means First street output means for displaying and / or outputting the name of each street read by the street reading means, and each street for display or / and sound outputting by the first street output means Selection means for selecting at least one of the names, and this selection Navigation apparatus characterized by comprising a second street output means for display output or / and audio outputs the selected street by stage. 2. Searching for a route to the input destination,
In a navigation device that provides route guidance according to this route, facility storage means for storing, for each area, data regarding facilities in each area according to all or part of an identification number corresponding to the area, Area input means for inputting all or part of the identification number, facility input means for inputting data for designating or limiting a part of the facility stored in the facility storage means, and the area input means and facility input means It is provided with facility reading means for reading data relating to each facility in the area according to the inputted data, and facility output means for displaying and / or outputting the facility read by the facility reading means. Characteristic navigation device. 3. Searching the route to the input destination,
In a navigation device that provides route guidance according to this route, a street storage unit that stores names of a plurality of streets, a street designation unit that designates a part of the plurality of streets stored in the street storage unit, and a street designation unit. Street reading means for reading at least one street name designated by the means from the street storage means, and street output means for displaying and / or outputting the street name read by the street reading means. Selecting means for selecting at least one of the street names displayed and / or voice-outputted by the street output means, and data on facilities existing in correspondence with the streets, for each street. Memory And a facility read-out means for reading out data relating to a facility corresponding to the street selected by the selecting means among the facilities stored in the facility storage means, and a facility read-out by the facility read-out means. A navigation device, comprising: facility output means for display output and / or voice output. 4. Search for a route to the input destination,
In a navigation device that provides route guidance according to this route, facility storage means for storing data on a plurality of facilities, facility designation means for designating a part of the data on a plurality of facilities stored in the facility storage means, Of the street names stored in the street storage means for storing the names of the streets existing corresponding to the facilities for each category or genre of the facility, the street names stored in the street storage means are assigned to the facilities designated by the facility designation means. A navigation device comprising: a street reading means for reading a street name according to a classification or a genre; and a street output means for displaying and / or outputting a street name read by the street reading means. 5. The street storage means stores data of a position, a shape and a name of a street for each area when one street spans a plurality of areas. The described navigation device. 6. The navigation device according to claim 1, wherein the second street output means performs a display for distinguishing the street selected by the selection means from other streets. 7. The navigation device according to claim 2, 3 or 4, wherein the data about the facility is a classification, genre, position or name of each facility. 8. The navigation device according to claim 2, wherein the facility input means inputs the classification, genre, position or name of each facility. 9. The facility storage means or the street storage means is provided for each area corresponding to all or part of an identification number corresponding to an area, or all or a higher part of a postal code or all or a higher part of a telephone number. The navigation device according to claim 3 or 4, wherein data regarding a facility or a street name is stored for each area corresponding to a part. 10. The navigation device according to claim 3, wherein the facility output means displays and outputs a list of each facility or a position of each facility on a map. 11. The navigation device according to claim 4, wherein the street output means displays and outputs the list and the shape and position of each street on the map. 12. The whole or a part of the identification number corresponding to the area is the whole or a high-order part of the postal code or the whole or a high-order part of the telephone number. Navigation device.