JPH10267670A - Navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further utilize the merit of such system as obtains information from a parent device. SOLUTION: A child device 2 provided with a position measurement means 21 which measures latitude and longitude of current position and a wireless communication means 24 which sends such measurement result as obtained with the positionmeasurement means 21, and a parent device 1 which retrieves the information corresponding to the measurement result sent from the child device 2 out of a database 4, and then sends it to the child device with a built-in wireless communication means 11, are provided. The child device is provided with a display means 26 which displays such information as sent from the parent device 1. The database held by the parent device 1 is such season information as related to a measurement result district. It might be a landscape information seen in such direction as indicate with the measurement result district. The child device can display the information corresponding to such season as related to the measurement result district, or such landscape as in the direction the child device facing can be displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device for displaying the current location of a vehicle or a person using a positioning means such as a GPS.

[0002]

2. Description of the Related Art Various navigation devices are provided for displaying a current position on a map based on positioning results obtained by positioning means, particularly GPS positioning means, and a map member stores a storage member such as a CD-ROM. Is used. However, the map information around the present location is not always stored in the possessed storage member, and in order to use the latest map, the latest version must always be obtained.

[0003] For this purpose, as disclosed in Japanese Patent Application Laid-Open No. 7-320196, a base unit provided with a database of map information is provided, and a base unit provided with positioning means for positioning the latitude and longitude of the current position is provided. If wireless communication is possible with the master unit and the slave unit transmits the positioning result obtained by the positioning means to the master unit, the master unit will display the map information of the area corresponding to the positioning result transmitted from the slave unit. A device has been proposed in which the current position is displayed on the basis of the transmitted map information, which is transmitted to the child device.

[0004]

In this case, it is not necessary for the child device to have the map information, and all the map information held by the parent device can be used. You can always use the latest map information without having to replace it with the latest version.

It is an object of the present invention to provide a navigation device that can further utilize the advantages of such a system.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention relates to a slave unit including positioning means for measuring the latitude and longitude of the current location and wireless communication means for transmitting a positioning result obtained by the positioning means. A base unit having a wireless communication unit for searching the database for information corresponding to the positioning result transmitted from the base unit and transmitting the information to the base unit, and displaying the display unit for displaying the information transmitted from the base unit to the base unit. In the navigation device provided, the first feature is that the database of the base unit is seasonal information on the positioning result area, and the positioning means for positioning the latitude and longitude of the current location and the azimuth detection for detecting the azimuth And a communication device for transmitting the positioning result and the direction obtained by the positioning device and the direction detecting device, and information corresponding to the positioning result and the direction transmitted from the child device. A navigation device having a communication device for retrieving the information from the database and transmitting the information to the child device, wherein the child device has display means for displaying information transmitted from the parent device. Has a second feature in that it is landscape information that can be seen in the direction specified by the direction of the positioning result area.

[0007] It is possible to display information corresponding to the season regarding the positioning result area on the slave unit, or to display a landscape in the direction in which the slave unit is facing.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS This navigation apparatus comprises a master unit 1 and a slave unit 2, and the master unit 1 is formed by a computer 10 to which a radio transceiver 11 is connected as shown in FIG. It is possible to access various databases 4 such as map information, store information, sightseeing information, and landscape image information. In the figure, reference numeral 12 denotes a wireless communication antenna.

The database for map information is divided into, for example, a table shown in FIG. 3 and map data shown in FIG. 4. Map data as shown in FIG. The map data numbers corresponding to the reference point numbers at the lower left, the latitude and longitude values of the reference points, and the corresponding map data numbers are summarized in a table as shown in FIG.

The store information is information on stores existing in each region. In addition to the location information, the store information includes types of stores such as gas stations, convenience stores, and restaurants, and business information such as regular holidays and opening and closing times. It is a summary. An example is shown in FIG. The tourist information is information about changes according to the seasons of each region.For example, places and periods where flowers and birds can be seen, places and dates and times of festivals, places of historic sites that are open for a limited time and disclosure It summarizes information such as time. An example is shown in FIG.

The landscape image information is stored in a database as digital map information including elevation, and the computer 10 in the base unit 1 determines the position of the viewpoint and the viewing direction, and converts the landscape image seen in that direction from the digital map information. It has an image processing unit for generating. Slave unit 2 is GP
S receiver 21, GPS antenna 22, direction sensor 23,
A computer 20 to which a wireless transceiver 24, a wireless communication antenna 25, a display 26 capable of displaying images, and the like are connected.
It is composed of The child device 2 does not have any recording member for recording map information to be displayed on the display 26, and stores a plurality of pieces of map information sent from the parent device 1 in one of the internal memories of the computer 20. Can be recorded only.

If the GPS receiver 21 is operated on the slave unit 2 to determine the current position, the slave unit 2 wirelessly transmits and receives the positioning result (latitude and longitude values) and a map request signal of the corresponding area. The computer 10 of the base unit 2 receiving the request searches the map data near the latitude and longitude values and sends it to the slave unit 2 side. The slave unit 2 superimposes the current location P on the received map data and displays it on the display 26. Although there is a trade-off between the area that can be displayed on the display 26 of the slave unit 2 and the size (area) of each map data, as shown in FIG. It is preferable to collectively send the map data to the slave unit 2.

When there is a request for the store information from the child device 2, the master device 1 also obtains the latitude and longitude values for the store information.
Alternatively, a store is searched based on the number of the map data sent to the slave unit 2 and the extracted store information is sent to the slave unit 2 side. The child device 2 is shown on a map as shown in FIG. 7 based on the position information and the like in the received store information. It is preferable to be able to distinguish and display the type of store and whether it is during business hours.

If there is a request for the seasonal information from the handset 2 side, the base unit 1 searches the tourist information database based on the latitude / longitude value or the map data number and date and time sent to the handset 2 side. Then, the extracted sightseeing information is sent to the handset 2 side. The handset 2 is shown on a map as shown in FIG. 9 based on the position information and the like in the received sightseeing information. The sightseeing information selected according to the season is displayed.

If there is a request for landscape information along with the azimuth information from the handset 2 side, the base unit 1 obtains the landscape information seen from the current position of the handset 2 in the direction indicated by the azimuth from the numerical map information as described above. Generated and transmitted to slave unit 2. The handset 2 displays the received scenery information on the display 26 as shown in FIG. 10, so that, for example, when a person climbs a mountain but cannot see a beautiful scenery due to rain or fog, the scenery that should be visible originally You can know. In addition, when the name of the mountain, the altitude, and the like serving as a landmark are displayed together with the landscape information, the name, the altitude, and the like of the mountain in the landscape in front of the user can be known.

The slave unit 2 may be provided with a recording member storing map information to be displayed on the display unit 26, and the information received from the master unit 1 may be only other information. In addition, only the map information of the area which is not present in the handset 2 can be sent from the master 1, or the creation date stamp of the map information of the handset 2 and the update date stamp of the map information of the master 1 can be compared. If the map information on the master unit 1 is newer, the master unit 1 can send out the map information (only the updated portion may be sent).

Further, although the communication means using a radio transceiver has been described, the communication means may use an ordinary telephone line.

[0018]

As described above, according to the present invention, it is possible to display information according to the season concerning the positioning result area on the slave unit, or to display the scenery in the direction in which the slave unit is directed. In this case, the advantage of the presence of the master unit can be further expanded to enhance convenience.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram of an example of an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the slave unit and the master unit regarding the map information according to the first embodiment.

FIG. 3 is an explanatory diagram of a map information table in a database of a parent device.

FIG. 4 is an explanatory diagram of map data in a database of a base unit.

FIG. 5 is a diagram illustrating display of map information in a slave unit.

FIG. 6 is an explanatory diagram of store information in a database of a parent device.

FIG. 7 is an explanatory diagram of display of store information on a child device.

FIG. 8 is an explanatory diagram of seasonal sightseeing information in a parent device database.

FIG. 9 is a diagram illustrating the display of seasonal information in a slave unit.

FIG. 10 is an explanatory diagram of display of landscape information on a child device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base unit 2 Remote unit 4 Database 21 GPS receiver 26 Display

Claims (2)

[Claims] 1. A slave unit including positioning means for measuring the latitude and longitude of a current location and communication means for transmitting a positioning result obtained by the positioning means, and information corresponding to the positioning result transmitted from the slave unit. A navigation device having a communication device for retrieving the information from the database and transmitting the information to the child device, wherein the child device has display means for displaying information transmitted from the parent device. Is a navigation device characterized by seasonal information on a positioning result area. 2. A positioning means for measuring the latitude and longitude of the current position and an azimuth detecting means for detecting an azimuth, and a communication means for transmitting the azimuth and the positioning result obtained by the locating means and the azimuth detecting means. A slave unit and a master unit including communication means for searching the database according to the positioning result and the direction transmitted from the slave unit and transmitting the information to the slave unit,
In a navigation apparatus provided with a display unit for displaying information transmitted from a master unit in a slave unit, a database of the master unit is scenery information that can be viewed in a direction designated by a direction of a positioning result area. Navigation device.