JPH09325042A - Apparatus for displaying running position - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance continuity in updating a route-guiding arrow, by deleting arrow information to be retained in a route-guiding means displaying the route- guiding arrow on an enlarged diagram taking a video camera image therein, and facilitating it to display the route-guiding arrow corresponding to a distance. SOLUTION: Based on two kinds of right and left route-guiding arrow information displayed when a distance between an intersection where one's vehicle is to be turned and the vehicles shortest in a distance range at which a route guidance is executed by an enlarged diagram taking a video camera image therein, the route-guiding arrow information is turned, as represented by an arrow 2, in accordance with the distance between the intersection to be turned at and the vehicle, and displayed on a display screen together with the video camera image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling position display device (navigation device) for displaying the current position of an automobile or the like on a display device together with a map, and more particularly to a route search from the current position of the vehicle to a destination. The present invention relates to a traveling position display device for guiding a route by an enlarged view incorporating a video camera image while traveling on the route.

[0002]

2. Description of the Related Art FIG. 4 schematically shows a conventional vehicle-mounted traveling position display device.

In FIG. 4, reference numeral 9 is a direction sensor, which uses a geomagnetic sensor for detecting the absolute traveling direction of the vehicle and a gyro for detecting the traveling direction of the vehicle. Reference numeral 10 is a distance sensor that generates a pulse corresponding to the number of rotations of the wheel, and 11 is various sensor signals such as an ON / OFF signal of a brake switch and a parking switch, and a power supply voltage monitoring signal. 12 is GPS (Global Positioni)
ng System) receiver, which can receive the radio waves transmitted from a plurality of satellites and calculate the position (latitude, longitude) of the receiving point. 13 is a CD
-ROM drive, CD with map data recorded
Read the map data from the ROM 14. Reference numeral 15 denotes a display / operation unit installed in the vehicle compartment, which is a liquid crystal display 15 for displaying a map and the current traveling position and direction of the automobile.
A, an operation device 15B, and a switch for instructing enlargement or reduction of the displayed map, a switch for instructing route search, and a place name displayed on the liquid crystal display 15A for selecting a destination on the operation device 15B. It is equipped with switches and the like. Reference numeral 16 is a main body of the apparatus, which is installed in a trunk room or the like.

Explaining the structure of the apparatus body 16,
Reference numeral 17 denotes a CPU (central processing unit) for performing various calculations, 18
Is a ROM (read only memory) in which programs for various calculations performed by the CPU 17 are stored, 19 is a sensor signal processing unit that processes sensor signals from the azimuth sensor 9, distance sensor 10, etc., 20 is the azimuth sensor 9, distance sensor 10, G
A memory (DRAM) 21 for storing data from the PS receiver 12, the CD-ROM drive 13 and the like, a calculation result in the CPU 17 and the like holds necessary data even when the power supply to the apparatus body 16 is stopped. A backup memory (SRAM) for storing, 22 is a liquid crystal display 1
A memory (kanji, font ROM) in which patterns such as characters and symbols to be displayed on 5A are stored, 23 is an image processor for forming a display screen based on map data and current position data of the vehicle, and 24 is a CPU 17 Map data, current location data, kanji, font ROM2 output from
A memory (VRAM) for memorizing an image to be displayed on the liquid crystal display 15A by synthesizing Chinese characters such as town names and road names output from 2 and fonts, and 25 is an RGB conversion circuit for converting the output data of the VRAM 24 into color signals The color signals are transmitted from the RGB conversion circuit 25 to the liquid crystal display 15A.
Is output to 26 is a communication interface. 27
Is a voice processor, and this voice processor 27 is C
A predetermined voice message is created based on a command from the PU 17.

Reference numeral 28 is a speaker for outputting a voice message created by the voice processor 27, and 29 is a video camera. The video camera image captured by the video camera 29 is sent to the CP via the communication interface 26.
After being processed in U17, it is displayed on the liquid crystal display 15A.

The operation of the above configuration will be described below. Output of direction sensor 9 and distance sensor 10
Is sent to the CPU 17 via the sensor signal processing unit 19. The CPU 17 calculates the current position of the vehicle and obtains the latitude and longitude of the current position. Also. CPU
At 17, the current position of the vehicle is corrected based on the data from the GPS receiver 12. Based on the present position thus obtained, map data corresponding to the present position is stored in the CD-ROM 14 by the CD-ROM drive 13.
The map data read from the memory 20 is read by the CPU 17 via the communication interface 26 by the memory (DRAM) 20.
Stored in.

A part of the map data stored in the DRAM 20 is read by the CUP 17, and the image processor 2
Image data (VRAM) 2 converted into image data in 3
Written to 4. The image data stored in the VRAM 24 is converted into a color signal by the RGB conversion circuit 25 and sent to the liquid crystal display 15A to display a map of a predetermined range centering on the current position. If the map data read from the DRAM 20 includes character codes and symbol codes, patterns corresponding to these character codes and symbol codes are read from the Kanji and font ROM 22 and are displayed on the liquid crystal display 15A together with the map. Characters such as place names and symbols such as schools are displayed. Further, as the vehicle travels, the current position displayed on the liquid crystal display 15A is sequentially changed based on the traveling speed and traveling direction that are sequentially obtained.

Next, the route search operation will be described with reference to the flow chart shown in FIG. 5 and the information conceptual diagram shown in FIG.

First, the destination is set in step S1 shown in FIG. The setting of the destination is performed, for example, by inputting the address of the destination from the operation tool 15B or by designating the point on the map displayed on the liquid crystal display 15A. Step S
In step 2, the CPU 17 determines whether to start the route search. This determination is made based on whether or not the route search start information is input by the display device operation tool 15B. Step S
If it is determined in 2 that the route search start information has been input, the process proceeds to step S3, and the route search is performed. At the time of this route search, nodes are set for points on the map displayed on the display screen, and links are set for roads, etc. on the map, and each of these links is used for route search called link cost. Contains information.

As shown in FIG. 6, the link costs of all the routes from the origin (current position node) X to the destination node Y are added to select the route with the lowest link cost. In the case of 6, the link X → a → c →
Total link cost of d → f → g → Y (10 + 5 + 5 + 5
+ 5 + 5 = 35) is the smallest, so link X → a
A route connecting → c → d → f → g → Y is selected. Then, the route selected in step S3 of FIG. 5 is displayed in red, for example, on the display map of the liquid crystal display 15A in step S4.

In the process in which the vehicle is traveling along the guide route displayed on the liquid crystal display 15A, the operating device 15
Of the intersections included in the guide route selected by B,
When a vehicle passes through a certain intersection, a clearer route guidance is provided by using an enlarged view near the intersection. This enlarged view is obtained by using a video camera image near the current position of the own vehicle from a video camera 29 installed in the own vehicle, and the enlarged view by the video camera image and the own vehicle on the display screen of the liquid crystal display 15A. By superimposing and displaying the arrow indicating the traveling direction of, the route guidance is realized.

[0012]

However, in the configuration of the above-mentioned conventional example, it is necessary to preliminarily hold a plurality of pieces of arrow information having different sizes depending on the distance between the intersection to be turned and the vehicle. is there. Further, when displaying the arrow, it is necessary to select the arrow to be displayed according to the distance between the intersection to be turned and the vehicle, and to update the displayed arrow as the vehicle moves. Therefore, the conventional route guidance means has a problem that there is a large amount of arrow information to be held, the display operation of the route guidance arrow to be displayed is complicated, and the route guidance arrow is updated stepwise.

The present invention solves the above conventional problems, reduces the arrow information to be held, facilitates the procedure for displaying the route guidance arrow, and enhances the continuity of updating the route guidance arrow. It is an object of the present invention to provide a traveling position display device capable of performing the above.

[0014]

In order to achieve the above-mentioned object, the present invention displays on a route guidance means by a video camera image executed at a specific intersection while traveling on a route searched by the route search means. The arrow displayed on the screen is rotated and displayed in accordance with the distance between the vehicle and the intersection at which the vehicle should turn, so that the arrow information of the left and right can be stored.

As a result, it is possible to obtain the traveling position display device which reduces the arrow information to be held, facilitates the display procedure of the route guidance arrow, and enhances the continuity of updating the route guidance arrow.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is to record the current position of the vehicle on the basis of the recording means in which the road data and the voice guidance phrase are recorded and the traveling speed and traveling direction of the vehicle. A current position calculating means for detecting, a display means for displaying the road map read from the recording means and the current position obtained by the current position calculating means, and a route from the current position to the destination are searched for. A route search means for displaying on the display means, and a route guide means for displaying the route searched by the route search means while the vehicle is traveling by superimposing a guide arrow on an enlarged view incorporating a video camera image, The route guide means has two types of left and right arrow information as route guide arrow information, and has route guide arrow display means for displaying the route guide arrow by rotating the route guide arrow according to the distance between the vehicle and the intersection at which the vehicle should turn. A shall have the effect that it is possible to realize a route guidance only possess left two arrows information.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. (Embodiment 1) The basic configuration of the present embodiment is the same as that of the above-mentioned conventional example, and the route guide arrow display means of the route guide means is different from the above-mentioned conventional example. Therefore, this point will be described.

FIG. 1 shows an example of route guidance at an intersection using a video camera image. In FIG. 1, the guidance intersection 1 indicates that it is included in the map information that it is an intersection to be guided in the enlarged view.
The route guidance arrow 2 indicates, as an example, the direction in which the vehicle should turn at the intersection shown in FIG. 1 when the route of the vehicle displayed on the display screen by the route search is advanced.

The display means of the route guide arrow 2 displayed on the video camera image as described above will be described with reference to FIG.

FIG. 2 shows a rotation means of the route guide arrow, which serves to rotate the arrow around the rotation axis 3 in accordance with the distance between the vehicle and the intersection at which the vehicle should turn, and the liquid crystal display 15A. The route guidance arrow 2 adapted to the video camera image on the display screen is created.
An example of a route guide arrow that rotates the basic pattern 2a according to the distance between the intersection to be turned and the vehicle is shown as a medium distance 2a1 and a large distance 2a2.

FIG. 3 is a conceptual diagram of arrow information to be held, showing that two types of left and right arrow information 2a and 2b are required. The basic pattern of the left arrow 2a (see FIG. 2) or the basic pattern of the right arrow 2b is an enlarged view by a video camera image. This is displayed when the distance between and is the shortest, and is based on the route guidance arrow in the state where the above-mentioned rotation action is not given.

The characteristics of the route guidance arrow display means and the conventional route guidance means in the route guidance using the video camera image according to the embodiment of the present invention are compared and shown in (Table 1).

[0023]

[Table 1]

As is clear from (Table 1), the means for displaying the route guidance arrow 2 displayed on the video camera image according to the embodiment of the present invention reduces the amount of arrow information to be held,
An excellent effect is obtained in terms of the ease of the route guide arrow display means and the continuity of updating the route guide arrow 2 accompanying the movement of the vehicle.

As described above, according to the embodiment of the present invention,
In the route guidance arrow displayed when guiding an intersection to be turned using an enlarged view of a video camera image, the arrow information of the route guidance arrow is limited to two types, left and right, according to the distance between the intersection and the vehicle to be turned. By providing an operation that gives a rotation effect to the route guidance arrow and displays it, the amount of arrow information to be retained is reduced, the route guidance arrow display procedure is simple, and the continuity of changes in the route guidance arrow accompanying the movement of the vehicle. Can be improved in terms of.

[0026]

As described above, according to the present invention, the route guide means for displaying the route searched by the route search means while the vehicle is traveling by superimposing the route guide arrow on an enlarged view incorporating a video camera image. In the above, by providing a route guide arrow display means for displaying the route guide arrow by giving a rotation according to the distance between the own vehicle and the intersection to be turned, the amount of arrow information to be retained is reduced, and the route guide arrow display procedure is reduced. Simplicity,
It is possible to improve the continuity of updating the route guidance arrow as the vehicle moves.

[Brief description of drawings]

FIG. 1 is a display diagram showing a display screen of a traveling position display device according to an embodiment of the present invention.

FIG. 2 is an operation principle diagram for explaining an operation of a route guidance arrow display changing means in the traveling position display device.

FIG. 3 is an information conceptual diagram showing an example of route guidance arrow information in the traveling position display device.

FIG. 4 is a block diagram showing an outline of a conventional traveling position display device.

FIG. 5 is a flowchart for explaining a route search operation in the traveling position display device.

FIG. 6 is an information conceptual diagram for explaining a link cost calculation operation in the traveling position display device.

[Explanation of symbols]

 1 guidance intersection 2 route guidance arrow 3 route guide arrow rotation axis 2a route guidance arrow basic pattern (left arrow) 2b route guidance arrow basic pattern (right arrow) 2a1 route guidance arrow after rotation 2a2 route guidance arrow Figure after rotation 9 Direction sensor 10 Distance sensor 11 Sensor signal 12 Sensor signal processing unit 12 GPS receiver 13 CD-ROM drive 14 CD-ROM 15 Display / inspection unit 15A Liquid crystal display 15B Operating device 16 Device body 17 CPU 18 ROM 19 Sensor signal processing unit 20 DRAM 21 SRAM 22 Kanji and font ROM 23 Image processor 24 VRAM 25 RGB conversion circuit 26 Communication interface 27 Voice processor 28 Speaker 29 Video camera

Claims (1)

[Claims] 1. A recording means in which road data and a voice guidance phrase are recorded, a current position calculating means for detecting a current position of the own vehicle based on a traveling speed and a traveling direction of the own vehicle, and read from the recording means. Display means for displaying the displayed road map and the current position obtained by the current position calculating means, route searching means for searching a route from the current position to the destination and displaying it on the display means, and own vehicle traveling And a route guide unit for displaying the route searched by the route search unit in an enlarged view incorporating a video camera image with a guide arrow superimposed thereon. The route guide unit has two types of left and right as route guide arrow information. A travel position display device that has arrow guide information and has route guide arrow display means for displaying rotation by giving a rotation corresponding to a distance between a vehicle and an intersection at which the vehicle should turn to the route guide arrow.