WO2007119347A1

WO2007119347A1 - Navigation device, map display, map displaying method, map displaying program, and recording medium

Info

Publication number: WO2007119347A1
Application number: PCT/JP2007/054995
Authority: WO
Inventors: Katsunori Oritani; Manabu Kiyota; Yasuo Ogiwara; Kenji Nakamura; Koichi Kikuchi; Kiyoshi Morikawa
Original assignee: Pioneer Corporation
Priority date: 2006-03-22
Filing date: 2007-03-13
Publication date: 2007-10-25

Abstract

A display information edit section (107) acquires map information in a predetermined area mainly including the navigation-device-equipped vehicle position information which a position recognizing section (104) acquires from a storage section (102), and allows a display section (101) to display route guidance information which is created by a guidance information creating section (105) and to which the map information is added. If a position variation detecting section (106) detects any position variation of the navigation-device-equipped vehicle, the position variation detecting section (106) judges whether or not there might be any displaymissing of the position of the navigation-device-equipped vehicle on the current displaying screen. If the position variation detecting section (106) detects that there might be any display missing of the position of the navigation-device-equipped vehicle, the whole screen of the display section (101) is changed to the screen displaying map information representing the area toward which the navigation-device-equipped vehicle is traveling.

Description

Specification

NAVIGATION DEVICE, MAP DISPLAY DEVICE, MAP DISPLAY METHOD, MAP DISPLAY PROGRAM, AND RECORDING MEDIUM

Technical field

The present invention relates to a navigation device, a map display device, a map display method, a map display program, and a recording medium.

Background art

In recent years, various navigation apparatuses that provide information useful for driving a car have been proposed. Conventional navigation devices generally display a part of the display that is not displayed on the display screen by scrolling when the information specified by the user does not fit on the display screen (see, for example, Patent Document 1).

Patent Document 1: Japanese Patent Laid-Open No. 5-94132

Disclosure of the invention

Problems to be solved by the invention

[0004] However, as in the prior art, the part that is not displayed is scrolled and displayed on the screen. When searching for a destination when driving a car, the display screen is displayed as the vehicle progresses. As the map of Scroll advances, there is a problem that it is difficult to grasp the movement status to the destination, especially the information on the destination.

Means for solving the problem

[0005] The navigation device according to the first aspect of the invention includes a display unit that displays various information, a destination point information acquisition unit that acquires information on a destination point selected by the user, and vehicle position information. To calculate the optimum route to the destination from the target location information acquired by the destination location information acquisition unit and the own vehicle location information acquired by the location recognition unit. Guidance information generating means for generating route guidance information, displacement detecting means for constantly detecting the displacement of the own vehicle position by monitoring the own vehicle position information acquired by the position recognizing means, and the position recognizing means Map information within a predetermined range centered on the vehicle position information is acquired, and the route guidance information generated by the guidance information generating means is If it is added to the map information and displayed on the display means, and the displacement detection means detects the displacement of the vehicle position, display it now! / In the screen that speaks, it is determined whether there is a possibility that the display of the vehicle position may be leaked. If there is a possibility that the display of the vehicle position may be leaked, the map information on the entire screen is displayed on the entire screen. Display information editing means for switching to.

[0006] Further, the map display device according to the invention of claim 3 has position recognition means for acquiring own vehicle position information and a display screen, and the own vehicle position information acquired by the position recognition means. Display means for displaying the map information including the information on the display screen, and storage means for storing a plurality of divided map information divided into a predetermined range by assigning a number to each divided map information. The means is characterized in that, when displaying the map information on the display screen, the number assigned to the divided map information adjacent to or included in the map information is displayed on the display screen.

[0007] In addition, the map display device according to the invention of claim 6 has position recognition means for acquiring own vehicle position information and a display screen, and the own vehicle position information acquired by the position recognition means. Display means for displaying map information including a display screen, storage means for storing a plurality of pieces of divided map information divided into predetermined ranges by assigning a number for each divided map information, and selecting for selecting the number And the display means displays the divided map information corresponding to the number selected by the selection means on the display screen instead of displaying the map information including the vehicle position. And

[0008] The map display method according to the invention of claim 7 includes a destination point information acquisition step for acquiring destination point information, a host vehicle location information acquisition step for acquiring host vehicle location information, A route guidance information generation step for calculating an optimum route to the ground and generating route guidance information to the destination, and a predetermined range centered on the vehicle location information acquired in the vehicle location information acquisition step. Destination information display step of displaying the map information, adding the route guidance information generated in the route guidance information generation step to the map information and displaying it on the screen, and whether or not there is a possibility of display omission. A display omission determination step for determining, and a display screen page switching step for switching the entire screen to map information in the traveling direction of the vehicle when it is determined that there is a risk of display omission in the display omission determination step. That features And

[0009] Further, a map display program that works on the invention of claim 8 causes a computer to execute the map display method of claim 7.

[0010] Further, a computer-readable recording medium according to the invention of claim 9 records the map display program according to claim 8.

Brief Description of Drawings

FIG. 1 is a block diagram showing an example of a functional configuration of a navigation device that is useful for an embodiment of the present invention.

FIG. 2 is a block diagram showing an example of a functional configuration of a map display device that is useful for an embodiment of the present invention.

FIG. 3 is a block diagram showing another example of the functional configuration of the map display device according to the embodiment of the present invention.

[FIG. 4] FIG. 4 is a flowchart showing an example of a processing procedure of the navigation apparatus according to the embodiment of the present invention.

[FIG. 5] FIG. 5 is a block diagram showing an example of a hardware configuration of a navigation device (map display device) according to an embodiment of the present invention.

[FIG. 6] FIG. 6 is a flowchart showing an example of a processing procedure of the navigation device (map display device) according to the embodiment of the present invention.

FIG. 7 is a diagram for explaining display screen switching by a page switching method.

Explanation of symbols

[0012] 100, 500 navigation device

101, 202 display

102, 203 Memory

103 Destination information acquisition unit

104, 201 Position recognition unit

105 Guide information generator

106 Displacement detector 107 Display information editor

200, 300 Map display device

204 Designated part

301 Selector

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of a navigation device, a map display device, a map display method, a map display program, and a recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

[0014] (Functional configuration of navigation device)

FIG. 1 is a block diagram showing an example of a functional configuration of a navigation apparatus that is useful for an embodiment of the present invention. This navigation device 100 is assumed to be provided in a vehicle (whether it is a four-wheeled vehicle or a two-wheeled vehicle). As shown in FIG. 1, a display unit 101, a storage unit 102, and destination point information acquisition A section 103, a position recognition section 104, a guidance information generation section 105, a displacement detection section 106, and a display information editing section 107 are provided.

The display unit 101 displays information on the user's existing location, information on the destination selected by the user, and the like.

The storage unit 102 stores map information to be provided to the user. The storage unit 102 may be connected to the navigation device 100 via a network.

[0017] The destination point information acquisition unit 103 acquires information on the destination point selected by the user.

[0018] The position recognition unit 104 acquires the vehicle position information. Here, the vehicle position information is obtained by receiving radio waves from GPS satellites and determining the geometric position with the GPS satellites, and can be measured anywhere on the earth. As radio waves, use LI radio waves with CZA (Coarse and Access) codes and navigation messages on a carrier wave of 1.575.42MHz. Thereby, the current position (latitude and longitude) of the vehicle is detected. Furthermore, information collected by various sensors such as a vehicle speed sensor and a gyro sensor may be considered.

[0019] The guidance information generation unit 105 calculates an optimum route to the destination from the destination point information acquired by the destination point information acquisition unit 103 and the own vehicle position information acquired by the position recognition unit 104. . Then, based on the vehicle position information that changes every moment, the route guidance information to the destination is generated in real time.

[0020] The displacement detection unit 106 always monitors the vehicle position information acquired by the position recognition unit 104 and detects the displacement of the vehicle position.

The display information editing unit 107 acquires map information in a predetermined range centered on the vehicle position information acquired by the position recognition unit 104 from the storage unit 102, and the route generated by the guidance information generation unit 105. The guidance information is added to the map information and displayed on the display unit 101. Further, when the displacement detecting unit 106 detects the displacement of the own vehicle position, it is determined whether or not there is a possibility that the display of the own vehicle position may be missed on the currently displayed screen! Then, if there is a risk of display omission of the vehicle position, the entire screen of the display unit 101 is switched to map information of the traveling direction of the vehicle (page switching). By doing this, you can switch the map information of the entire screen so that you can turn the page of the map book. The display information editing unit 107

If necessary, you can also use a conventional method of scrolling the map information on the display screen as the vehicle progresses.

[0022] (Functional configuration of map display device)

FIG. 2 is a block diagram showing an example of a functional configuration of a map display device that is useful in the embodiment of the present invention. The map display device 200 includes a position recognition unit 201, a display unit 202, a storage unit 203, and a designation unit 204.

[0023] The position recognition unit 201 acquires the vehicle position information. Here, the vehicle position information is obtained by receiving radio waves from GPS satellites and determining the geometric position with the GPS satellites, and can be measured anywhere on the earth. As radio waves, use LI radio waves with CZA (Coarse and Access) codes and navigation messages on a carrier wave of 1.575.42MHz. Thereby, the current position (latitude and longitude) of the vehicle is detected. Furthermore, information collected by various sensors such as a vehicle speed sensor and a gyro sensor may be considered.

The display unit 202 has a display screen, and displays map information including the vehicle position information acquired by the position recognition unit 201 on the display screen.

The storage unit 203 stores a plurality of pieces of divided map information divided into predetermined ranges by assigning numbers to the divided map information. [0026] The designation unit 204 designates the number displayed on the display screen.

In the map display device 200 configured as described above, when the display unit 202 displays the map information on the display screen, the display unit 202 adds the divided map information adjacent to or included in the map information. The displayed number is displayed on the display screen. Here, the display position of the number assigned to the divided map information adjacent to or included in the map information on the display screen is a position indicating the direction in which the divided map information exists with respect to the own vehicle position. It is. Further, the display unit 202 displays the divided map information corresponding to the number designated by the designation unit 204 on the display screen.

[0028] For example, in the case where map information is divided and stored in the storage unit 203 for each number (Al, A2,) indicating each of the map book in FIG. When the divided map information of the number B3 that includes the vehicle position and a part of the divided map information of the number B2 adjacent to it are displayed on the display screen, the number B2 is displayed at the top of the display screen and the right side is displayed. Number C3 is displayed, number A3 is displayed on the left side, and number B4 is displayed on the bottom.

[0029] By doing so, for example, in the map display mode upward in the traveling direction, which number of divided map information exists adjacent to each of the front, rear, and side in the traveling direction with respect to the vehicle position. You can check what to do. Then, for example, if a wide area map information in a certain range is displayed on the display screen and the entire image of the map book in FIG. It is possible to check at a glance whether it is located on the side.

[0030] Further, the entire image of the map book is displayed so as to be superimposed on the map information, and an arbitrary number in the entire image is selected, and the divided map information of the selected number is displayed on the display screen. By doing so, it is possible to immediately display the map information that the user wants to know, so that the operability can be improved.

[0031] Further, the map display device which is useful for the embodiment of the present invention can also be configured as follows.

FIG. 3 is a block diagram showing another example of the functional configuration of the map display device that is useful for the embodiment of the present invention. The map display device 300 includes a position recognition unit 201, a display unit 202, a storage unit 203, and a selection unit 301. Position recognition unit 201, display unit 202, and The storage unit 203 is the same as that shown in FIG.

The selection unit 301 selects a number given to the divided map information. Then, the display unit 202 displays the divided map information corresponding to the number selected by the selection unit 301 on the display screen of the display unit 202 instead of displaying the map information including the vehicle position.

[0034] (Processing procedure of navigation device and map display device)

Next, processing of the navigation device and the map display device that are useful for the embodiment of the present invention will be described. Since the processing of the navigation device and the map display device are the same, the processing procedure of the navigation device is shown below.

FIG. 4 is a flowchart showing an example of a processing procedure of the navigation apparatus according to the embodiment of the present invention. In the following, based on FIG. 4, the procedure of the processing of the navigation device that is relevant to the embodiment of the present invention will be described.

In the flowchart of FIG. 4, first, information on the destination point is acquired (step S401).

. Here, the destination point information acquisition unit 103 acquires information on the destination point selected by the user.

Next, own vehicle position information is acquired (step S402). Here, the position recognition unit 104 acquires the vehicle position information.

[0038] Next, the optimum route to the destination is calculated, and route guidance information to the destination is generated.

(Step S403). This process is performed by the guide information generation unit 105.

Next, route information to the destination is displayed (step S404). Here, the display information editing unit 107 acquires map information within a predetermined range centered on the vehicle position information acquired in step S402 from the storage unit 102, and the route guidance information generated in step S403 is obtained as the map information. The information is added to the information and displayed on the display unit 101.

[0040] Next, it is determined whether or not there is a possibility of display leakage (step S405). Here, the display information editing unit 107 determines whether or not there is a risk of display omission of the vehicle position on the current display screen from the displacement of the vehicle position detected by the displacement detection unit 106. Here, if there is no possibility of display omission (step S405: No), the process of step S405 is performed again.

[0041] On the other hand, when there is a risk of display omission in step S405 (step S405). : Yes) switches the page of the display screen (step S406). Here, the display information editing unit 107 switches the entire screen of the display unit 101 to map information in the traveling direction of the host vehicle (page switching). Thereafter, the process returns to step S405.

[0042] As described above, in the navigation device of this embodiment, the map information on the entire screen can be applied without scrolling and switching the map on the display screen as the vehicle travels as in the past. Since the map book is switched so that the pages are turned, it is easy to grasp the movement status (information on the destination) to the destination.

Example

Next, examples of the present invention will be shown.

[0044] (Hardware configuration of navigation device and map display device)

FIG. 5 is a block diagram showing an example of a hardware configuration of a navigation apparatus (map display apparatus) that is effective in the embodiment of the present invention. The hardware configuration of the navigation device (map display device) 500 will be described below with reference to FIG.

In FIG. 5, a navigation device (map display device) 500 includes a CPU 501, ROM 502, RAM 503, magnetic disk drive 504, magnetic disk 505, optical disk drive 506, optical disk 507, and audio. IZF (interface) 508, microphone 509, speed 510, input device 511, video IZF (interface) 512, display 513, communication IZF (interface) 514, GPS unit 515, various sensors 516, Is provided. The components 501 to 516 are connected by a bus 520.

First, the CPU 501 governs overall control of the navigation device (map display device) 500. The ROM 502 stores various programs such as a boot program, a route search program, a route guidance program, a voice generation program, a map information display program, a communication program, a database creation program, and a data analysis program. The CPU 501 executes each of the above programs, so that the destination point information acquisition unit 103, the guidance information generation unit 105, the display information editing unit 107, the position recognition unit 201, and the designation unit 204 shown in FIG. The functions of the selection unit 301 shown in FIG. 3 are realized.

[0047] The route search program searches for an optimum route from the departure point to the destination using map information recorded on the optical disc 507, which will be described later. This route search product Details of the system will be described later. The guidance route searched by executing this route search program is output to the audio IZF508 and the video IZF512 via the CPU501, for example.

In addition, the route guidance program reads the guidance route information searched by executing the route search program described above, the current position of the navigation device (map display device) 500 acquired by the communication IZF 514, and read from the optical disc 507. Real-time route guidance information is generated based on the map information. The route guidance information generated by executing the route guidance program is output to the audio IZ F508 and the video IZF 512 via the CPU 501, for example.

[0049] The sound generation program generates tone and sound information corresponding to the sound pattern. That is, based on the route guidance information generated by executing the route guidance program, the virtual sound source corresponding to the guidance point is set and the voice guidance information is generated, and output to the voice IZF508 via the CPU 501 for example. .

[0050] Further, the map information display program determines the display format of the map information to be displayed on the display 513 by the video I / F 512, and displays the map information on the display 513 according to the determined display format.

The RAM 503 is used as a work area for the CPU 501, for example. The magnetic disk drive 504 controls data read / write to the magnetic disk 505 in accordance with the control of the CPU 501. The magnetic disk 505 records data written under the control of the magnetic disk drive 504.

[0052] Specifically, the magnetic disk drive 504 records, for example, a warning sound generated by the above-described notification program on the magnetic disk 505 as sound data. As the magnetic disk 505, for example, HD (node disk) or FD (flexible disk) can be used.

The optical disk drive 506 controls data read / write to the optical disk 507 in accordance with the control of the CPU 501. The optical disc 507 is a detachable recording medium from which data is read from the optical disc 507 under the control of the optical disc drive 506. As the optical disc 507, a writable recording medium can be used. Also, In addition to the optical disk 507, MO and memory cards can be used as removable recording media.

[0054] As an example of information recorded on the magnetic disk 505 and the optical disk 507, voice information inside and outside the vehicle obtained by the microphone 509 described later, position information indicating the current position of the vehicle detected by the GPS unit 515 described later, Examples include output values from various sensors 516 described later. These pieces of information are used in the above-described route search program.

Other examples of information recorded on the magnetic disk 505 and the optical disk 507 include map information used for route search and route guidance. The map information includes background data representing features (features) such as buildings, rivers, and the ground surface, and road shape data representing the shape of the road, and can be displayed in 2D or 3D on the display screen of the display 513. It is drawn. When the navigation apparatus 500 is guiding a route, the map information and a vehicle mark indicating the current position of the vehicle acquired by the GPS unit 515 described later are displayed in an overlapping manner.

[0056] The road shape data further includes traffic condition data. Traffic condition data includes, for example, the presence or absence of traffic lights or pedestrian crossings, the presence or absence of highway entrances and junctions, the length (distance) of each link, road width, direction of travel, road type (high speed) Road, toll road, general road, etc.).

In the traffic condition data, past traffic information is stored as past traffic information statistically processed based on the season “day of the week / large holidays” and the like. This navigation device (map display device) 500 obtains, for example, information on currently occurring traffic jams from road traffic information received by communication IZF 514, which will be described later. It is also possible to predict the traffic situation at the specified time.

In this embodiment, the force for recording the map information on the magnetic disk 505, the optical disk 507, etc. is not limited to this. The map information is provided integrally with the hardware of the navigation device (map display device) 500, and is recorded only on the hardware. The map information is provided outside the navigation device (map display device) 500. It may be done. In this case, the navigation device (map display device) 500 transmits, for example, communication IZF514. The map information may be acquired via the network. The map information acquired in this way is stored in the RAM 503, for example.

The audio IZF 508 is connected to an audio input microphone 509 and an audio output speaker 510. Audio received by the microphone 509 is AZD converted in the audio IZF508. Speaker 510 may be provided outside the vehicle only inside the vehicle. From the speaker 510, sound based on the sound signal from the sound IZF 508 is output. In addition, sound input from the microphone 509 can be recorded on the magnetic disk 505 or the optical disk 507 as sound data, for example.

[0060] Examples of the input device 511 include a remote controller, a keyboard, a mouse, a touch panel, and the like provided with a plurality of keys for inputting characters, numerical values, various instructions, and the like.

Further, the video IZF 512 is connected to the display 513. Specifically, this video I / F 512 includes, for example, a graphic controller that controls the entire display 513, a buffer memory such as VRAM (Video RAM) that temporarily records image information that can be displayed immediately, and a graphic controller. This is configured by a control IC that controls the display of the display 513 based on image data output from the display 513.

[0062] Display 513 displays an icon, a cursor, a menu, a window, or various data such as characters and images. As this display 513, for example, a CRT, a TFT liquid crystal display, a plasma display or the like can be adopted.

In addition, the communication IZF 514 is connected to the network via radio and functions as an interface between the navigation device (map display device) 500 and the CPU 501. The communication IZF 514 is further connected to a communication network such as the Internet via radio, and also functions as an interface between the communication network and the CPU 501.

[0064] The network includes a LAN, a WAN, a public line network, a mobile phone network, and the like. Specifically, the communication IZF514 is composed of, for example, an FM tuner, a VICS (Vehicle Information and Communication System: Z) Beacon Resino, a wireless navigation device, and other navigation devices, and is distributed from the VICS center. Get traffic information such as traffic jams and traffic regulations.

[0065] The GPS unit 515 includes a received wave from a GPS satellite and various sensors 516 described later. Position information indicating the current position of the vehicle (current position of the navigation device (map display device) 500) is output. The position information indicating the current position is information specifying one point on map information such as latitude-longitude and altitude. In addition, the GPS unit 515 outputs odometer, speed change amount, azimuth change amount and the like using output values from various sensors 516. This makes it possible to analyze the dynamics of a vehicle such as a sudden brake or a sudden handle. This GPS unit 515 implements the function of the position recognition unit 104 shown in FIG.

[0066] Various sensors 516 are a vehicle speed sensor, an acceleration sensor, an angular velocity sensor, an orientation sensor, and the like, and their output values are used for calculation of position information by the GPS unit 515 and measurement of changes in speed and orientation. . The various sensors 516 realize the function of the displacement detector 106 shown in FIG.

[0067] The various sensors 516 include a sensor that detects each operation of the vehicle by the driver. The detection of each operation of the vehicle may be configured to detect, for example, steering operation, turn signal input, opening / closing of the vehicle door, and the like.

[0068] (Processing procedure of navigation device and map display device)

FIG. 6 is a flowchart showing an example of the processing procedure of the navigation device (map display device) according to the embodiment of the present invention. The processing procedure of the navigation device (map display device) according to the embodiment of the present invention will be described below with reference to FIG.

In the flowchart of FIG. 6, first, a display method is selected (step S601).

The selection of the display method is to select whether the display screen is switched by the page switching method or the scroll method as in the past. At the beginning, the display screen is switched using the page switching method, and when the predetermined distance is reached to the destination, the screen can be switched to the conventional scroll method (or vice versa). May be. This selection is completed when the user inputs predetermined information from the input device 511.

Next, information on the destination point is acquired (step S602). Here, based on information input by the user from the input device 511, the CPU 501 executes a predetermined program to acquire information on the destination point selected by the user. Next, the vehicle position information is acquired (step S603). Here, the GPS unit 515 acquires the vehicle position information.

[0072] Next, the optimum route to the destination is calculated, and route guidance information to the destination is generated.

(Step S604). This processing is performed using the destination point information acquired in step S602 and step S6.

This is executed by the CPU 501 executing a predetermined program based on the vehicle position information acquired in 03.

Next, route information to the destination is displayed (step S605). This process is executed by the CPU 501 executing a predetermined program. Specifically, the route guidance information to the destination point generated in step S604 is added to the map information and displayed on the display 513.

[0074] Then, it is determined whether or not there is a possibility of display leakage (step S606). Here, the CPU 501 executes a predetermined program, and from the displacement of the vehicle position detected by the various sensors 516,

In this screen, it is determined whether or not there is a possibility that the display position of the vehicle will be leaked. Here, if there is no possibility of display omission (step S606: No), the process of step S606 is performed again.

On the other hand, if there is a possibility of display omission in step S606 (step S606: Yes), the display screen is switched (step S607). This process is performed by the CPU 501 executing a predetermined program based on the selection of the display method performed in step S601.

[0076] For example, if switching the display screen in the page switching method is selected in step S601, the entire screen of display 513 is switched to map information in the traveling direction of the vehicle.

FIG. 7 is a diagram for explaining switching of the display screen by the page switching method. According to this method, the map information to be displayed is divided into blocks (see the lower part of the figure), and arbitrary blocks can be switched and displayed. Therefore, the map information of the entire screen can be switched so that the page of the map book can be turned. In this case, for example, the upper end side of the path 701 (see the upper part of the figure) in the displayed block (block B3) is displayed at the lower end side of the next block (block B2) of the same scale at the time of switching. If it is selected in step S601 that the display screen is switched by the scroll method, the display screen is switched by the scroll method as before.

[0079] Also, by selecting in step S601, the display screen is first switched by the page switching method, and when the predetermined distance is reached to the destination, the screen switching is switched to the conventional scroll method ( The reverse is also possible). After step S607, the process returns to step S606.

[0080] According to the navigation device (map display device) according to the embodiment of the present invention, the display screen is switched by the page switching method according to the above-described procedure, or the conventional scrolling is performed. The user can select whether to use this method or not, so the usability of the device is improved. In particular, when the display screen is switched using the page switching method, the map information on the entire screen is switched so that the page of the map book can also be turned, so the movement status to the destination (information on the destination) Will be easier to grasp.

[0081] In addition, the display screen can be switched at first using the page switching method, and when a predetermined distance is reached to the destination, the screen can be switched to the conventional scrolling screen switching (and vice versa). Therefore, it is possible to provide a navigation device that is easier to use and easier to use.

Note that the map display method described in this embodiment can be realized by executing a prepared program on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by reading the recording medium force by the computer. Further, this program may be a transmission medium that can be distributed through a network such as the Internet.

In this embodiment, the map display method is executed by a navigation device that can be mounted on a vehicle. However, the map display method can be executed on personal computers, mobile phones, personal digital assistants (PDAs), etc., as well as navigation devices alone.

Claims

The scope of the claims

[1] display means for displaying various information;

Destination point information acquisition means for acquiring information of the destination point selected by the user, position recognition means for acquiring own vehicle position information,

Guidance that calculates the optimum route to the destination from the destination point information acquired by the destination point information acquisition means and the vehicle position information acquired by the position recognition means, and generates route guidance information to the destination Information generating means;

Displacement detection means for constantly detecting the displacement of the vehicle position by monitoring the vehicle position information acquired by the position recognition means;

The map information in a predetermined range centered on the vehicle position information acquired by the position recognition means is acquired, and the route guidance information generated by the guidance information generation means is added to the map information and displayed on the display means. ,

When the displacement detection means detects the displacement of the vehicle position, the current display! / Squeeze screen determines whether there is a force that may cause the vehicle position display to be leaked. If there is a possibility that this will occur, the display information editing means for switching the entire screen to map information of the traveling direction of the vehicle,

A navigation device characterized by comprising:

[2] The display information editing means determines whether or not there is a risk of display omission of the vehicle position on the screen displayed when the displacement detection means detects the displacement of the vehicle position. The map information displayed on the screen according to the progress of the host vehicle and scrolling the map information to the progress of the host vehicle when there is a risk of display omission of the host vehicle position. Navigation device.

[3] a position recognition means for acquiring own vehicle position information;

Display means having a display screen and displaying map information including the vehicle position information acquired by the position recognition means on the display screen;

Storage means for storing a plurality of pieces of divided map information divided into predetermined ranges by assigning a number to each divided map information;

With The display means, when displaying the map information on the display screen, displays a number given to the divided map information adjacent to or included in the map information on the display screen. A map display device.

[4] The display position on the display screen of the number assigned to the divided map information adjacent to or included in the map information is a position indicating the direction in which the divided map information exists with respect to the own vehicle position. The map display device according to claim 3, wherein the map display device is provided.

[5] It further comprises a specifying means for specifying the number displayed on the display screen,

5. The map display device according to claim 3 or 4, wherein the display means displays divided map information corresponding to the number designated by the designation means on the display screen.

[6] A position recognition means for acquiring own vehicle position information;

A display unit having a display screen and displaying map information including the vehicle position information acquired by the position recognition unit on the display screen;

Selecting means for selecting the number;

With

The map display device characterized in that the display means displays the divided map information corresponding to the number selected by the selection means on the display screen instead of displaying the map information including the vehicle position.

[7] Destination information acquisition process for acquiring destination point information;

Own vehicle position information acquisition step for acquiring own vehicle position information;

A route guidance information generation process for calculating an optimum route to the destination and generating route guidance information to the destination;

The map information in a predetermined range centered on the vehicle position information acquired in the vehicle position information acquisition step is acquired, and the route guidance information generated in the route guidance information generation step is added to the map information. Route information display process to be displayed on the screen,

A display omission judgment step for judging whether or not there is a possibility of omission of display; A map display method comprising: a display screen page switching step of switching the entire screen to map information in the traveling direction of the host vehicle when it is determined that there is a risk of display leakage in the display leakage determination step.

[8] A map display program for causing a computer to execute the map display method according to claim 7.

[9] A computer-readable recording medium on which the map display program according to claim 8 is recorded.