JPH05216401A - Navigation device - Google Patents

Abstract

PURPOSE:To improve the visibility and reduce the size of a display part by displaying the direction and the name of a road branching from an intersection right before the intersection. CONSTITUTION:The navigation device 10 mounted on an automobile consists of a map book 33, a route guide device 12, a GPS antenna 1, a distance sensor 16, and an azimuth sensor 17. The route guide device 12 is equipped with an LCD display unit 19 as a display and so constituted as to calculate the current position according to pieces of information from the sensor and antenna and then display a book number, a page number, and a frame number of the map book 33, a travel course in the frame, etc., corresponding to the current position. Then a variable N is prepared and 1 is set as N; and an N-th branch direction and its course name are read in among VICS data stored in a work memory. Then the branch direction is displayed on the N-th line on the LCD display unit 19 with an arrow and the course name is displayed on the same line.

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 providing a driver with necessary information on a vehicle.

[0002]

2. Description of the Related Art Conventionally, systems for providing various kinds of information to passengers of a vehicle have been studied. JP-A-3-
Japanese Patent No. 154526 discloses a system including a road antenna that transmits various information before an intersection or a branch point. The position of the roadside antenna from the roadside antenna,
The place name, the route name, the name of the intersection, the distance to the intersection, the branch direction, the destination and the distance after the branch are transmitted. These pieces of information are detected by the on-vehicle antenna mounted on the automobile and displayed on the display of the on-vehicle device. The control circuit is equipped with three switches for short range, medium range and long range,
By operating this, information can be selected and obtained.

[0003]

Information in the vehicle-mounted navigation system is used by the driver to determine the course direction and the like while actually driving or stopping the vehicle. Therefore, it must be provided to the driver at the right time and in the right form. The information that the driver needs is information near the way to the destination. For example,
At the point 100m before the intersection, if the names of all the junctions of the intersection are displayed, the driver must search for the name of the destination or waypoint that he or she intends to go to from all the names of the intersections. .. The car is 60K per hour
While running at m / h, 100m can run in 6 seconds. The driver must search for the destination in this short period of time, judge whether to go straight, turn right, or turn left, and if turning right or left, attach a turn signal and operate the car. Therefore, the information given to the driver should be able to be judged instantaneously.

Therefore, it is an object of the present invention to provide the driver with information about the route to be traveled among the information obtained in the vehicle.

[0005]

The means used in the present invention for solving the above-mentioned problems are information including a branching direction of a plurality of roads crossing an intersection at a destination and a route name thereof in a vehicle. Is provided with a display for displaying only the branching direction and the route name of each road crossing the intersection before the intersection on one screen at a time.

[0006] The information acquisition means may be composed of, for example, a road antenna arranged on a route and emitting information in the vicinity thereof, and a vehicle antenna arranged in the vehicle and receiving information from the road antenna. The information acquisition means may also arrange a memory storing map data on the vehicle, obtain the current position separately, and match with the map to extract the route name.

[0007]

According to the above-mentioned means, the branching direction and the route name of the road branching from the intersection before the intersection are displayed on the display at one time during traveling.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

In the present embodiment, as shown in FIG. 1, a navigation device 10 mounted on an automobile comprises a map book 33, a route guide device 12, a GPS antenna 11, a distance sensor 16 and a direction sensor 17. There is. The map book 33 has a plurality of pages in which a map divided into a plurality of vertical and horizontal frames is described. The route guide device 12 is provided on a vehicle that is a moving body. A distance sensor 16 and a direction sensor 17 are connected to the route guide device 12. Also, the root guide device has a G
G for PS (Global Positioning System) reception
The PS antenna 11 is connected. The route guide device 12 includes an LCD display device 19 which is a display, calculates a current position in accordance with information from a sensor or an antenna, and, as described later, a book number, a page number of a map book corresponding to the current position. It is configured to be able to display a frame number, a traveling locus on the frame, and the like. A sheet 34 formed of a transparent plate having a size corresponding to a frame is used by being superposed on the map of the map book 33 on the map of the map book 33. On the sheet 34, horizontal and vertical grids are printed so as to further divide the frames. The user prepares the map book of the number displayed on the display of the route guide device 12, opens the displayed page, and displays the sheet 34 on the displayed frame number.
By overlapping, it is possible to judge by matching the points on the display with the points on the map.

In FIG. 2, a road antenna 3 is installed in front of a main intersection 2 on the road outside the automobile 1 on which the navigation device 10 is mounted. The roadside antenna 3 receives information from the roadside device 4 and emits a signal toward the road surface 5. The information provided by the roadside device 4 is shown in FIG.
The on-road device 4 transmits the shape of the intersection that the automobile 1 will reach next, the branching direction in each branching direction, the route name, the place name and the distance of the destination when going to the branching direction.

As shown in FIGS. 4 and 5, the route guide device 12 has an opening / closing switch 20a, a voice key 20b, a VICS key 20c, a locus key 20d, and a locus key 20d on a case 12a.
Destination direction key 20e, 8 number switches 20f-2
0m, page key 20n, frame key 20o, frame position key 20p, voice memo key 20q, four cursor keys 20r to 20u, current position key 20v, GPS clock key 2
0w, a locus memory key 20x, a current position memory key 20y, and a switch group 20 of an ON / OFF switch 20z. The cover 12b is opened / closed according to ON / OFF of the open / close switch 20a, and in the open state, the page key 20n, the frame key 20o, the frame position key 20p, the voice memo key 20q,
The cursor keys 20r to 20u are operably exposed.
On the case 12a, a hole 27a for a microphone 27 (see FIG. 6) built in the case 12a, and a speaker 26 (see FIG. 6) built in the case 12a.
A plurality of holes 26a are provided for each.

As shown in FIG. 6, the route guide device 12 includes a VICS antenna 13, a VICS receiver 14, and a GP.
S receiver 15, main controller 18, LCD display 19, operation switch group 20, route name database ROM
21, atlas database ROM 22, Kanji font data ROM 23, voice recording / playback controller 24, voice data memory 25, speaker 26 described above, microphone 27 described above, guidance destination / route memory 2
8, traveling locus data memory 29, spot data memory 3
0, a work memory 31, and a route name memory 32. The distance sensor 16 and the direction sensor 17 are connected to the controller 18. GPS antenna 11 is GPS
It is connected to the receiver 15.

The GPS antenna 11 is used together with the GPS receiver 15 to obtain the absolute coordinates of the current position by using GPS (Global Positioning System). The obtained absolute coordinates of the current position are sequentially sent to the controller 18.

The distance sensor 16 measures the distance traveled by the moving body. When this device is mounted on a vehicle, a vehicle speed sensor that measures the number of rotations of the wheels may be used to determine the travel distance by multiplying the number of rotations of the wheel by the length of the circumference of the wheel.

The azimuth sensor 17 measures the absolute azimuth of the moving body. The orientation sensor, for example,
A gyro sensor or a geomagnetic sensor is used.

The VICS antenna 13 and the VICS receiver 14 receive signals from the on-road antenna 3 shown in FIG. VICS is Vehicle Information Communic
is an abbreviation for ation System. The VICS antenna 13 and the VICS receiver 14 receive the information from the roadside antenna 3 and sequentially send it to the controller 18.

The LCD display 19 is a liquid crystal display, and in accordance with instructions from the controller 18, guidance information (destination location, destination remaining distance, traveling locus, etc.) and current position information of the moving body (map book position, traveling locus). Etc.) is displayed.
The Kanji font data ROM 23 is a ROM (read-only memory) that stores data for multiple Kanji fonts.
Is. The controller 18 reads the Kanji font data from the Kanji font data ROM 23 as necessary, and
Display on the D display unit 19.

The route name database ROM 21 is shown in FIG.
As shown in, it is a ROM in which route name data is stored and is used for setting traveling routes. Atlas database RO
M22 is a ROM in which data such as latitude and longitude for each page of a specific map book, map scale, etc. is stored. When the latitude and longitude of a certain point are given, the position of which page of the map book 33 is located. Can be identified. The controller 18 reads the data stored in the route name database ROM 21 and the map book database ROM 22 as needed.

The voice data memory 25 is a memory capable of storing voice data. Voice recording / playback controller 2
Reference numeral 4 denotes a device that operates in response to an instruction from the controller 18, stores voice data input from the microphone 27 in the voice data memory 25, and causes the stored voice data to ring from the speaker 26.

The guidance destination / route point memory 28 is a memory capable of storing a plurality of destinations or route points set by the user. In the present embodiment, it is possible to store position data at a maximum of eight locations. There is. Running locus data memory 2
Reference numeral 9 is a memory for storing traveling locus data, which stores the locus data according to an instruction from the controller.
The spot data memory 30 is a memory for storing spot data, and stores the spot data according to an instruction from the controller. The work memory 31 is a memory that temporarily holds data. The route name memory 32 is a memory for storing the route name data, and stores the route name data according to the instruction of the controller.

The controller 18 is composed of a microcomputer and operates according to the flow charts shown in FIGS.

FIG. 7 shows the main routine of the controller 18. When the controller 18 starts, the input / output terminals of the microcomputer are set and the RAM and the like are initialized in step 100. After that, the mode selection routine 200, the current position calculation routine 300, the guidance calculation routine 400, and the screen display routine 500 are sequentially repeated.

The mode selection routine 200 is for selecting and deciding a mode such as display contents displayed on the LCD display device 19. The modes used in this example are:
There are a guidance display mode, a VICS display mode, a destination direction display mode, a present location display mode, and a GPS / clock display mode. The guidance display mode is further divided into a long-distance locus mode, a medium-distance locus mode, and a short-distance locus mode. In the mode selection routine, as shown in FIG. 8, first, a key input from the operation switch group 20 is detected (step 201). Here, the state of each key of the operation switch group 20 operated by the user is set. Next, the open / close switch 20 of the operation switch group 20
If a is off, display key processing step 203
If the open / close switch 20a is turned on, the setting key processing step 204 is executed. Next, the ON / OFF key 20z of the operation switch group 20
If the ON / OFF key 20z is off, the power-off process is performed, and all the processes are terminated. If the ON / OFF key 20z remains on, the process returns to the main routine and continues the process.

The display key processing step 203 is for switching each display mode in accordance with the user's key selection, and is set in a state where the cover 12b is closed in FIGS. Details of the display key processing step 203 are shown in FIG.

When the trajectory key 20d is pressed, the display mode value is switched in the guide display mode in step 602. Here, each time this step is entered, the long-distance locus mode, the medium-distance locus mode, and the short-distance locus mode are sequentially switched.

When the numeric keys 20f to 20m are pressed,
In step 604, the target transit point is switched. Here, the destinations and transit points stored at a maximum of eight locations are switched according to the number of the pressed key. This allows the user to select the destination or transit point that he is currently aiming for.

When the VICS key 20c is pressed, the display mode value is switched to the VICS display mode in step 606.

When the destination direction key 20e is pressed, the display mode value is switched to the destination direction display mode in step 608.

When the current position key 20v is pressed, the display mode value is switched to the current position display mode in step 610.

When the voice key 20b is pressed, the voice data is converted into voice and output in step 612. Here, the voice recording / playback controller 24 is instructed to read the voice data from the voice data memory 25 and to output the voice from the speaker 26.

When the GPS / clock key 20w is pressed,
In step 614, the display mode value is switched to GPS / clock display mode.

When the trajectory storage key 20x is pressed, the trajectory storage processing is performed in step 616. As will be described later, the working memory 31 sequentially stores traveling locus data up to the present location with a constant data amount, but here, the traveling locus data is stored in the traveling locus data memory 29.

When the current position storage key 20y is pressed,
At step 618, the current position storing process is performed. Here, the spot data of the current position is stored in the spot data memory 30.

The setting key processing step 204 is for setting and inputting a destination, a waypoint, etc. in accordance with a user's key operation, and is set with the cover 12b open in FIGS. Details of the setting key processing step 204 are shown in FIG.

When the numeric keys 20f to 20m are pressed,
In step 622, the setting mode value is switched to the destination / route point mode, and the destination / route number to be set at the same time is switched to the number of the pressed key.

When the current position key 20v is pressed, the set mode value is switched to the current position mode in step 624.

When the VICS key 20c is pressed, the travel route setting process is performed in step 626. Here, the route name data of the planned traveling is set. The LCD display 19 displays some data from the route name data (road name) stored in the route name database ROM 21.
Is displayed, and the up / down cursor keys 20r and 20t are used for movement / selection, and the right cursor key 20s is used for setting / deletion.

Next, a process is selected according to the set mode value (step 627). If the setting mode value is the mode for setting the destination / route, the destination / route setting routine 628 is executed, and if the setting mode value is the current mode, the current setting routine 629 is executed.

Next, the destination / route destination setting routine 6
The details of 28 are shown in FIG.

If the page key 20n and the frame key 20o are pressed at the same time, in step 632, the map book number is set. Here, the map book number is set using the up, down, left, and right cursor keys 20r to 20u.

If the page key 20n is pressed, at step 634, the map book page number is set. Here, the page numbers in the map book are set using the up, down, left, and right cursor keys 20r to 20u.

When the frame key 20o is pressed, in step 636, the frame number is set. Here, the up / down / left / right cursor keys 20r to 20u are used to set the frame number in the page.

When the in-frame position key 20p is pressed, in step 638, the in-frame position is set. Here, the up / down / left / right cursor keys 20r to 20u are used to set the relative coordinates in the frame.

When the voice memo key 20q is pressed, voice data is input in step 640. Here, the voice data is loaded from the microphone 27 to the voice recording / playback controller 24, and the voice data memory 2
5 sends an instruction to store voice data.

Voice memo key 20q and in-frame position key 20
If p is pressed at the same time, in step 642, the data of the destination / route point designated by the above operation is cleared.

From the above, the destination desired by the user
A waypoint is set.

The details of the current position setting processing routine 629 are shown in FIG.

If the page key 20n and the frame key 20o are pressed at the same time, the map book number is set in step 652. Here, the map book number is set using the up, down, left, and right cursor keys 20r to 20u.

When the page key 20n is pressed, in step 654, the map book page number is set. Here, the page numbers in the map book are set using the up, down, left, and right cursor keys 20r to 20u.

When the frame key 20o is pressed, in step 656, the frame number is set. Here, the up / down / left / right cursor keys 20r to 20u are used to set the frame number in the page.

If the in-frame position key 20p is pressed, the in-frame position is set in step 658. Here, the up / down / left / right cursor keys 20r to 20u are used to set the relative coordinates in the frame.

As described above, the user sets the current position.

Next, the details of the current position calculation routine in the main routine will be described with reference to FIG. Here, first, in step 301, the GPS receiver 14
Receive GPS data from. Next, in step 302, VICS-related data as shown in FIG. 3 is received from the VICS receiver 15. This data is stored in the work memory 31. Further, step 303
At, the distance and azimuth data from the distance sensor 16 and the azimuth sensor 17 is received. Next, the distance sensor 16
And the distance and direction data from the direction sensor 17, and G
The GPS data from the PS receiver 14 is compared and the distance and azimuth data are corrected / updated to obtain more accurate current position data. At the map book position calculation step 305, the absolute latitude and longitude of the current position obtained from the current position data and the map book data stored in the map book database ROM 22 are compared and calculated, and the current position is which page of which map book. Of which frame number and in which frame the position is.

Next, the details of the guidance calculation routine in the main routine will be described with reference to FIG. here,
If the destination is not set, the display mode value is set to the current position display mode. If there is a destination setting, measure the linear distance between the current position and the absolute coordinates of the destination,
The remaining distance is obtained (step 403). In addition, when a plurality of waypoints are set, a more accurate remaining distance can be obtained by individually calculating the straight line distances between the waypoints and adding them. next,
The direction of the destination with respect to the current position is obtained from the current position and the absolute coordinates of the destination (step 404). Next, the running loci accumulated so far are shifted, and the running locus data is updated by adding the point of the current location. Next, at step 406, a guide display content selection step is performed.

In the guidance instruction content selection step, it is determined which of the set waypoint, traveling locus, current position, remaining distance, and direction is to be displayed. First, it is divided according to the size of the remaining distance between the present location and the destination. As shown in FIG. 19, the area within the distance A from the destination is the area 3 and the distance A.
The area in the range B to B is set as the area 2, the area in the range B to C is set as the area 1, and the area in the range C or more is set as the area 0. Here, A <B <C <D. Current location is area 0
If it belongs to, select all display of destinations and transit points, blinking the number of target destinations and transit points, display of traveling locus, display of current location, display of remaining distance, display of direction, long-distance locus mode. Set to. If it belongs to area 1, the display of the number of the target destination, the display of the traveling locus, the display of the current position, the display of the remaining distance, and the display of the bearing are selected, and the medium distance locus mode is set. If it belongs to the area 2, the display of the number of the target destination, the display of the traveling locus, the display of the current location, the display of the remaining distance, and the display of the bearing are selected, and the short distance locus mode is set. If it belongs to the area 3, the display of the number of the target destination and the display of the traveling locus are selected, and the arrival locus mode is set. Hysteresis may be provided in the direction deviating outward of the area.

Next, details of the screen display routine in the main routine will be described with reference to FIG. here,
In step 501, the display mode value set in the above-mentioned mode selection routine is determined. If the display mode value is the guidance display mode, guidance display is performed in step 502. If the display mode value is the VICS display mode, step 503
To display VICS. If the display mode value is the current position display mode, the current position is displayed in step 504. If the display mode value is GPS / clock display mode, step 50
5. GPS / clock display is performed. Then, step 506
To output the voice.

In the guide display routine 502, the display set in the guide instruction content selection step 406 described above is displayed as L.
It is displayed on the CD display 19. The traveling locus, remaining distance, azimuth, etc. are displayed on the LCD display 19 according to the distance to the destination. A display example of the guidance display is shown in FIG. (A) is an example of destination direction display. Displays the direction and straight line distance of the destination viewed from the current location. (B) is an example of the guidance display in the long-distance locus mode. All indications of destinations and transit points,
Flashes the numbers of target destinations and transit points, displays the traveling path, displays the current location, displays the remaining distance, and displays the bearing. (C)
Is an example of the guidance display in the medium-distance locus mode. Display the number of the target destination, display the traveling path, display the current location,
The remaining distance is displayed and the bearing is displayed. (D) is an example of the guidance display in the short-distance locus mode. It displays the number of the target destination, the traveling path, the current location, the remaining distance, and the bearing. (E) is an example of the guidance display in the reaching trajectory mode. The number of the target destination and the traveling locus are displayed. (F) is an example of VICS display.
As shown in the figure, the main road, the destination, and the direction thereof received from the transmitter arranged on the road are displayed, and road regulation information in the vicinity thereof is displayed. (G) is an example of the present location display. The map book number, the page number, the frame number, and the position in the frame are indicated by numbers, and the traveling locus and the current position in the frame are displayed. (H) is a display example of the setting screen. You can enter the destination / route number, map book number, page number, frame number, and position within the frame.

The details of the VICS display routine are shown in FIG. First, in step 721, a variable N is prepared and N is set to 1. Next, at step 722, the branch direction of the Nth branch direction and its route name are read from the VICS data shown in FIG. 3 stored in the work memory 31. Next, at step 723, the branching direction is indicated by an arrow on the Nth line of the LCD display 19, and subsequently the route name is displayed on the same line. Next, in step 724, N is incremented by 1, and steps 722 to 724 are repeated until N becomes 4 in step 725.

A display example of the VICS display routine is shown in FIG.
This will be described with reference to FIGS. Now, it is assumed that the area where the route names R1, R2, R3, R4 and R5 as shown in FIG. Point a before intersection A where lines R1 and R2 intersect, point b before intersection B where lines R1 and R3 branch, intersection D where lines R3 and R4 intersect
It is assumed that the on-road antenna 3 is installed at a point d before this and a point e before the intersection E where the routes R3 and R5 intersect.

When the automobile 1 approaches the point a, the information shown in FIG. 20A is obtained from the roadside antenna located at the point a and stored in the working memory 31. VICS of FIG.
In the display routine, since N is 1 when the vehicle first passes through step 722, the branching direction (straight ahead) of the first branching direction and the route name (R1) are read, and FIG.
As shown in (b), the first line 19a of the LCD display 19
A branch direction arrow and a route name (R1) are displayed at.
Then N is incremented by 1 to give 2. Since N = 4 is not satisfied, the process returns to step 722 again. Next, the branch direction (left) and the route name (R2) of the second branch direction are read, and the LCD
An arrow in the branching direction and a route name (R2) are displayed on the second line 19b of the display device 19. Then N is incremented by 1 and 3
Becomes Since N = 4 is not satisfied, the process returns to step 722 again. Next, the branch direction (right) and the route name (R
2) is read, and the arrow in the branch direction and the route name (R2) are displayed on the third line 19c of the LCD display device 19. Then N is incremented by 1 to 4 Since N = 4,
This routine ends. The LCD display 19 is shown in FIG.
A display such as 0 (b) is made. Point b, point d, e
Similarly, at the point, as shown in FIGS. 20 (d), (f), and (h), respectively.
Is displayed. If the driver previously remembers the route (R1, R3, R5) to be traveled, it is sufficient to cause the vehicle to change course when the route name is displayed.

In the above-described embodiment, the direction and the name of the route branching from the intersection are displayed before the intersection. Of the information displayed at one time, there is no information other than the route direction and route name. When obtaining other information, the mode is switched by a switch or the like. Therefore, VICS
If the key is pressed, only about three lines of information are displayed on the screen, so it is possible to instantly determine the course change before the intersection.

The LCD display should preferably display three lines, but it is also possible to display four to five lines in consideration of intersections of complicated shapes.

In the above embodiment, the information is obtained from the on-road antenna, but in addition to this, or in addition to this, the information may be selected from the information from the information source provided in the vehicle. Good. For example, a CD-ROM containing map data is provided in the vehicle, and characters of about three lines are displayed to judge and display the shape, branching direction, and route name of the next approaching intersection from the current position as in the above embodiment. As a display, an inexpensive and small liquid crystal display can be used. Therefore, an inexpensive navigation device as a whole can be obtained.

[0064]

As described above, in the present invention, the direction and the route name of the route branching from the intersection are displayed before the intersection. Of the information displayed at one time, there is no information other than the route direction and route name. Therefore, since there is no extra display, the visibility is excellent. Moreover, since there is no extra display, the display unit can be made compact.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention.

FIG. 2 is a bird's-eye view of an intersection where the on-road antenna of the present invention is installed.

FIG. 3 is an explanatory diagram showing information from the roadside device of FIG.

FIG. 4 is a front view of the route guide device of FIG.

5 is a top view of the route guide device of FIG.

6 is an internal circuit diagram of the route guide device of FIG.

7 is a flowchart of a main routine of the controller shown in FIG.

FIG. 8 is a flowchart of a mode selection routine of FIG.

9 is a flowchart of the display key processing routine of FIG.

10 is a flowchart of a setting key processing routine of FIG.

FIG. 11 is a flowchart of the destination / route destination setting processing routine of FIG.

FIG. 12 is a flowchart of a current location setting processing routine of FIG.

FIG. 13 is a flowchart of the current position calculation routine of FIG.

14 is a flowchart of the guidance calculation routine of FIG.

15 is a flowchart of the screen display routine of FIG.

16 is a flowchart of the VICS display routine of FIG.

FIG. 17 is an explanatory diagram of the operation of the route guide device of FIG.

18 is an explanatory view showing a display example of the route guide device of FIG.

FIG. 19 is an explanatory diagram showing the operation of the present invention.

FIG. 20 is an explanatory diagram showing the operation of the present invention.

[Explanation of symbols]

 1 Car 2 Intersection 3 Road Antenna 4 Road Device 5 Road Surface 10 Navigation Device 11 GPS Antenna 12 Route Guide Device 12a Case 12b Cover 13 VICS Antenna (Information Obtaining Means) 14 VICS Receiver (Information Obtaining Means) 15 GPS Receiver 16 Distance Sensor 17 Direction Sensor 18 Main Controller 19 LCD Display (Display) 20 Operation Switch Group 20a Open / Close Switch 20b Voice Key 20c VICS Key 20d Trajectory Key 20e Destination Direction Key 20f-20m Numerical Switch 20n Page Key 20o Frame Key 20p Frame Position Key 20q Voice memo key 20r to 20u Cursor key 20v Current location key 20w GPS clock key 20x Trace memory key 20y Current location memory key 20z ON / OFF switch 1 Route name database ROM 22 Map book database ROM 23 Kanji font data ROM 24 Voice recording / playback controller 25 Voice data memory 26 Speaker 26a hole 27 Microphone 27a hole 28 Guidance destination / waypoint memory 29 Running track data memory 30 Point data Memory 31 Working memory 32 Route name memory 33 Atlas 34 sheet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Kondo 2-1-1 Asahi-cho, Kariya city, Aichi Prefecture Aisin Seiki Co., Ltd. (72) Inventor Yasushi Aoki 2-chome, Asahi-cho, Kariya city, Aichi prefecture Address Aisin Seiki Co., Ltd.

Claims (2)

[Claims] 1. An information acquisition means for acquiring information including a branching direction of a plurality of roads crossing an intersection at a destination and a route name in the vehicle, and each of the information acquisition means crossing the intersection before the intersection. A navigation device, comprising: a display that displays only a road branching direction and a route name on one screen at a time. 2. The navigation device according to claim 1, wherein the display displays three lines.