JP3158908B2 - Travel position display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a running position display device for displaying a current position and a running locus of an automobile or the like together with a map.

[0002]

2. Description of the Related Art Conventionally, such a running position display device has a vehicle position detecting means for detecting a vehicle position, a storage means for storing map data, a CPU, a memory and a display. The map data corresponding to the position of the vehicle detected by the position detection means is read from the storage means,
The display means displays a map based on the read map data and displays the own vehicle position detected by the own vehicle position detecting means.

FIG. 9 shows a map display process of the above-mentioned conventional example. In FIG. 9, in step A, the scale of the map to be displayed on the display is selected. In step B, the map display data of the selected scale is read from the storage means. In step C, a map is drawn on the display based on the data read from the storage means. Next, in step D, the road network data recorded in the road layer is read from the storage means, and the position and direction of the own vehicle are determined from the road network data and the current position data calculated by the CPU (step E). ), Step F
Is to display the own vehicle mark on the map displayed on the display means. FIG. 10 shows an example of a map display in a conventional example. A conventional traveling position display device can also display that the vehicle is currently traveling on the road S.

[0004]

However, in the above-described conventional traveling position display device, as shown in FIG. 10, various character strings such as place names and facility names are displayed in a similar format on a map. Therefore, when the user checks the map while driving, it may be difficult to instantly recognize and determine the information required by the user. In addition, since the information to be displayed is determined according to the scale of the map to be displayed, necessary information may not be displayed. As described above, in the conventional example, various character strings such as a place name and a facility name are displayed in a similar format on a map, and there is a disadvantage that it is difficult for a user to recognize and determine the character string. Also, some information may not be displayed depending on the scale, and to obtain the necessary information,
There is a drawback that the display position of the map must be moved or the scale must be switched for display.

[0005]

[0006]

[0007]

[0008]

Means for Solving the Problems A first invention of the present invention is:
Acquires the map data corresponding to the selected scale out of multiple map data in which the degree of detail of information is changed according to the scale,
Display means for displaying a map based on the map data;
Information selection means for selecting the type of information to be displayed on the map, and after setting a mode for displaying the selected information,
The selected information is displayed even if the scale of the display map is changed .

According to a second aspect of the present invention, in the first aspect, there is provided a display selecting means for selecting information to be displayed on a map and selecting whether or not to display the information. It is.

[0010]

[0011]

[0012]

[0013]

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the traveling position display device of the embodiment. In FIG. 1, reference numeral 1 denotes a direction sensor. The direction sensor 1 uses a geomagnetic sensor for detecting an absolute running direction of the vehicle and an optical gyro for detecting a relative running direction of the vehicle. Reference numeral 2 denotes a distance sensor that generates a pulse corresponding to the number of rotations of the wheels, and 3 denotes various sensor signals such as an on / off signal of a brake switch, a parking switch, and the like, and a power supply voltage monitoring signal. Reference numeral 4 denotes a sensor signal processing unit for processing sensor signals of the azimuth sensor 1, the distance sensor 2, and the like.
The GPS receiver 5 can obtain the position (latitude and longitude) of the reception point by receiving and calculating radio waves transmitted from a plurality of satellites. Reference numeral 6 denotes a CD-ROM drive.
The OM drive 6 is a CD-RO on which map data is recorded.
The map data is read from M7. Reference numeral 8 denotes a display / operation unit installed in the vehicle interior.
Is composed of a liquid crystal display 8A for displaying a map and the current traveling position and direction of the car, and a touch panel 8B provided on the front of the liquid crystal display 8A. The touch panel 8B is used to instruct the display map to be enlarged or reduced. Switch and the like. Reference numeral 9 denotes an apparatus main body, which is installed in a trunk room or the like.

Next, the configuration of the apparatus main body 9 will be described.
10 is a CPU (Central Processing Unit) for performing various calculations, 11
Denotes a ROM (Read Only Memory) in which programs for various calculations performed by the CPU 9 are stored, and 12 stores calculation results of the CPU 10 from the azimuth sensor 1, the distance sensor 2, the GPS receiver 5, the CD-ROM drive 6, and the like. Memory (DRAM), 13 is a backup memory (SRAM) for holding necessary data even when power supply to the apparatus main body 9 is stopped, and 14 is characters, symbols, etc. displayed on the liquid crystal display 8A. (Kanji, font ROM) storing an image processor, 15 is an image processor for forming a display image based on map data, current position data of the own vehicle, and the like, and 16 is an image processor 15
Map data, current location data and kanji output from
A memory (VRAM) for synthesizing Chinese characters such as place names and road names and fonts output from the font ROM 14 and storing an image to be displayed on the liquid crystal display 8A;
M16 is an RGB conversion circuit for converting the output data into a color signal, and the converted color signal is converted to an RGB conversion circuit 17
Is output to the liquid crystal display 8A. 18 is a communication interface. The liquid crystal display 8A displays a road map around the current position of the own vehicle and also displays place names, intersection names, road names, and the like. Further, an own vehicle mark 19 indicating the current position of the own vehicle is displayed in the display map. The vehicle mark 19 indicates the current position and the traveling direction of the vehicle.

FIG. 2 shows the format of the data stored in the CD-ROM 7.
1 is a drawing parameter, 22 is figure management information, and 23 and 24
Is a figure leaf, which has background data, character data,
It stores road data and the like, and stores data for each unit map obtained by dividing a topographic map of the whole of Japan by latitude and longitude. Reference numeral 25 stores place name index data in which information such as place names and facility names is indexed, and positions indicated by the place names and facility names are stored as coordinate data. In the figure, a figure (level 0) that roughly describes a wide area and a figure (level 0) that describes a narrow area in detail are set. Each leaf is composed of map display levels A, B and C describing the same area. The map display levels A, B, and C describe B in more detail than A and C in more detail than B. And each map <br/> display level A, B, C is constituted by the map display level management information and a plurality of uni Tsu bets. A unit describes a divided area obtained by dividing the area at each map display level into a plurality of areas. Each unit includes a unit header, a character layer,
It is composed of a background layer, a road layer, an option layer, and the like. In the character layer, place names, road names, facility names, and the like displayed on the map are recorded. In the background layer, data for drawing roads, facilities, and the like are recorded. In the road layer, as shown in FIG. Stores data on coordinate points (nodes) and lines (links) describing roads including intersections, for example, node numbers of nodes, latitude and longitude, link numbers of links, link distances, and the like. In FIG. 3, circles (○) indicate nodes, and lines between nodes indicate links. Further, a black circle (●) of the node number 4 indicates an intersection node. Note that the data recorded in the road layer is not directly involved in the map display, but is used as road network information such as map matching.

The operation of the embodiment of the present invention having the above configuration will be described below. In FIG. 1, an orientation sensor 1
And the output of the distance sensor 2 are sent to the CPU 10 via the sensor processing unit 4. The CPU 10 calculates the current position of the vehicle, and obtains the latitude and longitude of the current position. The current position is corrected based on the data from the GPS receiver 5. The map data of the unit corresponding to the current position is read out from the CD-ROM 7 by the CD-ROM drive 6 based on the current position obtained in this way, and the map data is stored in the memory (DRAM) 12 via the communication interface 18. Is stored in DRAM
A part of the map data stored in 12 is continued by the CPU 10, converted into image data by the image processor 15, and written into the image memory 16. The image data stored in the image memory 16 is converted into color signals by an RGB conversion circuit 17 and sent to the liquid crystal display 8A, where a map of a predetermined range centering on the current position is displayed. DRAM 12
If character data and symbol codes are included in the map data read from, the patterns corresponding to these character codes and symbol codes are read from the kanji / font ROM 14, so that characters such as place names are displayed on the liquid crystal display 8A together with the map. , School, etc. are displayed.
Further, the current position displayed on the liquid crystal display 8A is sequentially changed based on the traveling speed and traveling azimuth sequentially obtained as the vehicle travels.

Next, the map display processing will be described. FIG.
5 shows a map display mode selection process, and FIGS.
Indicates a map display process. In FIG. 4, a mode for displaying the information selected in the map display mode selection processing is set. In step A, a mode for displaying the selected information is selected by the operation button, and in step B, whether to display the selected information in a distinguished manner or to display only the selected information is selected. Next, information to be displayed in step C is selected. After setting the mode for displaying the selected information, the selected information is displayed even if the scale of the display map is changed.

In FIG. 5, when the scale of the display map is selected in step D, it is determined in step E whether the current display mode is a mode for displaying the selected information. FIG.
If the mode to select and display the necessary information is set in the map display mode selection process, the map leaf level and map display level according to the selected scale are selected first, and the map position corresponds to the own vehicle position. Is selected, and map display data other than character information is read from the CD-ROM 7 (step F). Then, the read data is drawn (step G). Next, the character information data of the type selected in step C is read from the CD-ROM 7 (step H). Next, it is determined whether or not the mode in which only the information selected in step I is displayed. When the mode for displaying only the information selected in step B of FIG. 4 is set, the data read in step H is drawn on the map drawn in step G (FIG. 7). Next, in step P in FIG. 6, road network data recorded in the road layer is read from the CD-ROM 7, and the position and orientation of the own vehicle are determined from the road network data and the current position data obtained by the CPU 10 ( In step Q), the own vehicle mark 19 is displayed on the display map in step R. If the mode for displaying the information selected in step B of FIG.
Is determined as No, and the process proceeds to Step K. First, character information data of an unselected type is read from the CD-ROM 7 and drawn on the map drawn in step G (step L). Next, the data read in step H is drawn in a format different from other character information (for example, inverted) (FIG. 8), and the process proceeds to step P. If the answer is no in step E in FIG. 5, the map data of the reduced scale selected in step D is read from the CD-ROM 7, and the map is drawn in step O.
It goes to.

As described above, according to the present embodiment, the user selects desired information and displays the selected information separately from others, or displays only the selected information, so that the user can easily recognize necessary information. In addition, by displaying the selected information regardless of the scale, necessary information can be obtained without manually moving the map or changing the scale.

The character information data is indexed (2 in FIG. 2).
5) and the character layer (26 in FIG. 2) may be read, and data for determining a place name, a road name, and a type of facility is added to the data. In addition, the data may be read from both the index and the character layer. In this case, since it is conceivable that the same character information is stored in each of them, data for discriminating such that two identical information are not displayed is used. Is added.

[0022]

As described above, according to the present invention,
Displaying the selected information separately from other information or displaying only the selected information has an advantage that the user can easily recognize necessary information in a short time even during driving. In addition, displaying the selected information regardless of the display scale eliminates the need to manually move the display position of the display map or change the scale, eliminating the need for manual operation by the user, and further improving driving. It has the advantage of being able to concentrate. Further, the present invention can select a normal display mode and a mode in which information to be displayed is selected and displayed. In the mode in which information is selected and displayed, a mode in which the selected information is displayed in a distinguished manner, A mode in which only information is displayed can be selected.

[Brief description of the drawings]

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

FIG. 2 is a configuration diagram showing a format of a CD-ROM of the embodiment.

FIG. 3 is a configuration diagram of road data recorded on a CD-ROM according to the embodiment;

FIG. 4 is a flowchart of a map display mode selection process of the embodiment.

FIG. 5 is a flowchart of a map display process of the embodiment.

FIG. 6 is a flowchart of a map display process of the embodiment.

FIG. 7 is a display diagram showing a map display example of the liquid crystal display of the embodiment.

FIG. 8 is a display diagram showing a map display example of the liquid crystal display of the embodiment.

FIG. 9 is a flowchart of a map display process in a conventional traveling position display device.

FIG. 10 is a display diagram showing a map display example of the liquid crystal display of the conventional example.

[Explanation of symbols]

 Reference Signs List 1 orientation sensor 2 distance sensor 3 output from other sensors 4 sensor signal processing unit 5 GPS receiver 6 CD-ROM drive 7 CD-ROM 8 display / operation unit 8A liquid crystal display 8B touch panel 9 device body 10 CPU 11 program ROM 12 D -RAM 13 S-RAM 14 Kanji font ROM 15 Image processor 16 V-RAM 17 RGB conversion 18 Communication interface 19 Own vehicle mark

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01C 21/00 G01S 5/02 G08G 1/0969 G09B 29/10 G01S 5/14

Claims (3)

(57) [Claims] 1. A display means for acquiring map data corresponding to a selected scale out of a plurality of map data in which the degree of detail of information is changed according to the scale, and displaying a map based on the map data. Information selecting means for selecting the type of information to be displayed on the map, and a mode for displaying the selected information.
After setting the mode, the selected information will be displayed even if you change the scale of the displayed map.
The traveling position display device, wherein the information is displayed . 2. The travel position display device according to claim 1, further comprising display selection means for selecting information to be displayed on a map and selecting whether or not to display the information. 3. Acquiring map data corresponding to a selected scale from a plurality of map data in which the degree of detail of information is changed according to the scale, displaying a map based on the map data, and selecting a map based on the selected map data . After setting the information display mode
A map display method, wherein the selected information is displayed even if the scale of the display map is changed .