JPH0944087A - Dislay device for running position - Google Patents

Abstract

PROBLEM TO BE SOLVED: To emphatically display selected place names or facility names on a map when a region and a facility are selected and a map of their vicinity is displayed. SOLUTION: It is retrieved whether an index acquisition character train being a place name selected from indexes or a facility name is included in read map display data or not, when it is not included, the index acquisition character train is plotted on a coordinate acquired from retrieving data emphatically, and display is performed centering the character train. When the index acquisition character train is included in the map display data, a distance between a coordinate position of the character train in the map display data and a coordinate position in the index data is calculated, when it is decided from this distance that the character train in the map display data cannot be displayed on a display screen, the index acquisition character train is plotted on a coordinate in the index data emphatically, display is performed centering the index acquisition character train.

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 for displaying the current position and traveling locus of an automobile or the like together with a map.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram showing a schematic configuration of a conventional vehicle-mounted traveling position display device.

In FIG. 6, reference numeral 1 denotes an azimuth sensor. As the azimuth sensor 1, a gyro such as a geomagnetic sensor for detecting the absolute traveling azimuth of an automobile and an optical fiber gyro for detecting the relative traveling azimuth of the automobile is used. Reference numeral 2 is a distance sensor that generates a pulse according to the number of rotations of the wheel, and 3 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. Reference numeral 4 denotes a sensor signal processing unit that processes sensor signals from the azimuth sensor 1 and distance sensor 2, and 5 denotes a GPS (Global).
l Positioning System) receiver, and this GPS receiver 5 obtains the position (latitude, longitude) of the receiving point by receiving and calculating radio waves transmitted from a plurality of satellites.

Reference numeral 6 denotes a CD-ROM drive, which is C
The D-ROM drive 6 is a CD on which map data is recorded.
-To read map data from the ROM 7. Reference numeral 8 denotes a display / operation unit installed in the passenger compartment. The display / operation unit 8 is a display 8A for displaying a map and the current traveling position and direction of the automobile, and a touch panel 8B provided on the front surface of the display 8A. The touch panel 8B is provided with a switch for instructing enlargement or reduction of the display map, a switch for instructing a route search, a switch for selecting a destination from the place names displayed on the display 8A, and the like. There is. Reference numeral 9 denotes an apparatus main body, and the apparatus main body 9 is installed in a trunk room or the like.

Next, the structure of the apparatus body 9 will be described. 10 is a CPU (central processing unit) that performs various calculations,
Reference numeral 11 is a ROM (read only memory) in which programs for various calculations performed by the CPU 9 are stored, and 12 is an azimuth sensor 1, a distance sensor 2, a GPS receiver 5, a CD-ROM.
A memory (DRAM) for storing data from the drive 6 and the like, a calculation result in the CPU 10 and the like, and a backup memory 13 for holding necessary data even when the power supply to the apparatus body 9 is stopped ( SRAM), 14 is a memory (kanji / font ROM) in which patterns such as characters and symbols to be displayed on the display 8A are stored, and 15 is for forming a display image based on map data or current position data of the vehicle. An image processor 16 is a memory for storing an image to be displayed on the display 8A by synthesizing map data output from the image processor 15, current position data, kanji such as a place name and a road name output from the kanji / font ROM 14, and a font. (VRAM), 17 is VR
RGB for converting the output data of AM16 into color signals
It is a conversion circuit, and the converted color signal is the RGB conversion circuit 1
7 is output to the display 8A. Reference numeral 18 is a communication interface.

On the display 8A, as shown in FIG. 7, a surrounding map of the current position of the vehicle is displayed together with the town name and the like, and a vehicle mark 19 for displaying the current position of the vehicle is displayed in the displayed map. It is a thing.

FIG. 10 shows the format of data stored in the CD-ROM 7. In FIG. 10, 20 is a disk label, 21 is a drawing parameter, 22 is drawing leaf management information, and 23 and 24 are drawing leaves. Background data, character data, road data, etc. are stored in these drawing leaves,
Data is stored for each unit map obtained by dividing a topographic map of Japan by latitude and longitude. 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 map leaf is composed of map display levels A, B, and C that describe the same area. Map display levels A, B, C are B, B rather than A
C is described in more detail. Each map display level A, B, C is composed of map display level management information and a plurality of units.

The unit describes a divided area obtained by dividing the area of each map display level into a plurality of areas, and each unit is composed of a unit header, a character layer, a background layer, a road layer, an option layer and the like. Place names, road names, facility names, etc. displayed on the map are recorded in the character layer 26, data for drawing roads, facilities, etc. are recorded in the background layer, and the road layer is shown in FIG. As described above, data about coordinate points (nodes) and lines (links) that describe roads including intersections, for example, node numbers of nodes, latitude, longitude, link numbers of links, link distances, and the like are stored.

In FIG. 11, circles (∘) indicate nodes, and lines between the nodes indicate links. A black circle (●) with a node number of 4 indicates an intersection node.

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. CD-ROM
In FIG. 7, data 25 for an index that stores a place name or facility name and coordinate data corresponding to the place name or facility name is stored.

In FIG. 6, the output of the azimuth sensor 1 and the output of the distance sensor 2 are sent to the CPU 10 via the sensor processing unit 4.
Sent to The CPU 10 calculates the current position of the vehicle and obtains the latitude and longitude of the current position. Also GPS
The current position is corrected based on the data from the receiver 5.

Based on the present position thus obtained, the map data of the unit corresponding to the present position is recorded on the CD-R.
The map data is read from the CD-ROM 7 by the OM drive 6 and stored in the memory (DRAM) 12 via the communication interface 18. DRAM 12
A part of the map data stored in is read by the CPU 10, converted into image data by the image processor 15 and written in the image memory 16. The image data stored in the image memory 16 is converted into a color signal by the RGB conversion circuit 17 and sent to the display 8A, and a map of a predetermined range centering on the current position is displayed. Further, if the map data read from the DRAM 12 includes character codes and symbol codes, the patterns corresponding to these character codes and symbol codes are read from the Kanji / font ROM 14, so that the display 8A displays a place name together with the map. Characters such as, and symbols such as school are displayed. In addition, the current position displayed on the display 8A is sequentially changed based on the traveling speed and traveling direction that are sequentially obtained as the vehicle travels.

FIG. 7 shows a display example of the display 8A. The display 8A displays a road map, a place name, an intersection name, a road name, and the like. In FIG. 7, reference numeral 19 indicates a vehicle mark of the vehicle, and this vehicle mark 19 indicates the current position and traveling direction of the vehicle.

Next, the map display operation from the index of the conventional example will be described with reference to FIG. As shown in FIG. 12, in step S1, the place name or facility name of the area to be displayed on the display 8A is selected. In step S2, the coordinate data having the selected place name or facility name (hereinafter referred to as an index acquisition character string) is read from the index data of the CD-ROM 7. In step S3, the map display data of the area including the coordinates obtained in step S2 is stored on the CD.
-Read from ROM7. In the next step S4, a map is drawn on the display 8A based on the map display data centering on the coordinates acquired in step S2.

In such a conventional example, as shown in FIG. 8, for example, when XX 1-chome is selected from XX town, the coordinate data of the index acquisition character string in the index data and that in the map display data are selected. The drawing coordinate data of the character string do not always match, and the index acquisition character string may not be displayed on the displayed map.

Therefore, it is difficult to immediately recognize which place is displayed. Also, as shown in Fig. 9, when XX 2-chome is selected from XX town, even if XX 2-chome is displayed, the drawing method is the same as other place names and facility names, and it is displayed in a non-centered area. Therefore, it is necessary to switch the displayed scale and move the display position of the map vertically and horizontally.

[0017]

As described above, in the conventional example, the place name or facility name (index acquisition character string) selected by the index may not be displayed, and the displayed location is difficult to understand, and the scale switching button may be difficult to understand. There was a problem that it was necessary to manually operate to display the map at a reduced scale, or to move the display position vertically and horizontally to search for a necessary place name.

Further, even if it is displayed, it is difficult to distinguish it from other place names or facility names, and it is necessary to search the displayed map.

The present invention solves the above-mentioned conventional problems, and a traveling position where a place name or a facility name (index acquisition character string) selected from an index can be emphasized and displayed on a map displayed on a display. An object is to provide a display device.

[0020]

In order to achieve the above object, the present invention provides a vehicle position detecting means for detecting a vehicle position, a map display data storing means for storing road information and a place name, and a place name and a place name. Index data storage means for indexing the facility name and storing the position pointed by the place name or facility name as coordinate data,
Means for selecting a region or facility and reading coordinate data from the index data storage means; display means for reading and displaying map data corresponding to the read coordinate data from the map display data storage means; First determining means for determining whether or not there is an index acquisition character string that is the selected place name or facility name in the selected map display data; and when the first determination means determines that there is an index acquisition character string, the reading is performed. The distance between the issued coordinate data and the corresponding display position of the index acquisition character string in the map display data is calculated, and the display screen of the display means is centered on the coordinate data of the index data storage means from the calculation result. Second determining means for determining whether or not the index acquisition character string of the map display data is displayed when displayed on the screen, and the character string is displayed on the display screen by the second determining means. When it is determined that the character string is emphasized and displayed, when the first determination means determines that there is no index acquisition character and when the second determination means determines that the character cannot be displayed, it is displayed in the center. And a display control unit for displaying the character string in an emphasized manner.

[0021]

The present invention has the above-described configuration, and searches for whether the place name or facility name (index acquisition character string) selected from the index is included in the read map display data. The index-acquired character string is emphasized at the coordinates acquired from the index data and drawn, and the character string is displayed as the center on the screen. Then, if the index acquisition character string is included in the map display data, the distance between the coordinate position of the character string in the map display data and the coordinate position in the index data is calculated and obtained from this calculation. When it is determined that the character string in the map display data cannot be displayed on the display screen from the distance, the index acquisition character string is emphasized and drawn at the coordinates in the index data, and the place name or facility name is centered. Display as.
If the index acquisition character string in the map data is included in the range of the display screen, draw the character string with emphasis.
Display on the screen centered on the coordinates in the index data.

[0022]

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

FIG. 1 is a block diagram showing a schematic configuration of a traveling position display device according to the present invention. The same components as those in FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted. I will focus on the part.

The embodiment shown in FIG. 1 is different from the conventional one in that the CPU 1 has a function of displaying the index acquisition character string selected from the index on the map displayed on the display in an emphasized manner.
01 and the program ROM 111 are newly added with the function realizing means described below.

That is, from the index data of the CD-ROM 7,
The coordinate data having the selected index acquisition character string is read, and the map display data corresponding to this coordinate data is C
A determination function of reading from the D-ROM 7 and displaying it on the display 8A, and determining whether or not the selected index acquisition character string is present in the read map display data, when it is determined that the index acquisition character string is present, The distance between the read coordinate data and the display position of the corresponding index acquisition character string in the map display data is calculated, and the index acquisition character string selected from this calculation result is displayed in the display screen of the display 8A. A function of determining whether it can be displayed, and a display control function of emphasizing the character string and displaying it on the display 8A when it is determined that the index acquisition character string can be displayed in the display screen,
And the display 8A when it is determined that the image cannot be displayed
A display control function for emphasizing and displaying a character string is provided in the center of.

Next, the index map display processing of the present embodiment configured as described above will be described with reference to the flow charts shown in FIGS.

First, in FIG. 2, in step S11, an area or facility on the map to be displayed is selected by operating the operation button on the touch panel 8B.
In the next step S12, the coordinate data of the selected area or facility is acquired from the index data 25 of the CD-ROM 7, and the map display data of the area including the acquired coordinates is C.
Read from D-ROM 7. (Step S13). In the next step S14, the map is drawn with the coordinate data acquired in step S12 as the center, and the character string data in the map display data read in step S13 is removed.

Next, in step S15 shown in FIG. 3, the character string data of the map display data read in condition 1, that is, in step S13, is added to the name character string of the area or facility selected in step S11 (index acquisition character string). Is included, and when it is determined to be included, when it is displayed on the screen centering on the condition 2 or the coordinates acquired in step S12 in step S16, step S1
It is determined whether the index acquisition character string selected in 1 is displayed on the display screen of the display 8A. If it is determined to be displayed in step S16, of the map display data read in step S13, the character string data of the index acquisition character string selected in step S11 is drawn (step S17), and then the index acquisition is performed in step S18. Step S13 for the character string
It is distinguished from other character strings on the coordinates stored in the map display data read by and is drawn by emphasizing with different character size and font, different color, different typeface, reverse character, and the like. A display example at this time is shown in FIG.

On the other hand, step S15 or step S
If it is determined No in step 16, step S1
9, the character string data in the map display data read in step S13 is drawn, and in the next step S20 the index acquisition character string is distinguished from other character strings at the center of the display screen (coordinates acquired in step S12). However, different character sizes and fonts, different colors, different typefaces, reverse characters, etc. are emphasized and drawn. A display example at this time is shown in FIG.

As described above, according to the present embodiment, when the area or facility is selected and the map is displayed, the selected place name or facility name is emphasized and displayed on the map, so that the scale is not changed. Further, the selected map can be easily recognized as shown in FIGS. 4 and 5 without moving the display position vertically and horizontally.

[0031]

As is apparent from the above-described embodiment, the present invention is capable of highlighting the selected place name or facility name on the map when the region or facility is selected and the map is displayed. At first glance, the user has the advantage that the selected place name or facility name can be easily recognized on the map.

[Brief description of drawings]

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

FIG. 2 is a flowchart for explaining index map display processing in the present embodiment.

FIG. 3 is a flowchart for explaining index map display processing in this embodiment.

FIG. 4 is a display diagram showing a display example of a display in the present embodiment.

FIG. 5 is a display diagram showing a display example of a display in the present embodiment.

FIG. 6 is a schematic block diagram of a conventional traveling position display device.

FIG. 7 is a display diagram showing a display example of a conventional display.

FIG. 8 is a display diagram showing a display example of a conventional display.

FIG. 9 is a display diagram showing a display example of a conventional display.

FIG. 10 is a block diagram showing the format of a CD-ROM.

FIG. 11 is a configuration diagram showing road data recorded in a CD-ROM.

FIG. 12 is a flowchart of display processing in a conventional example.

[Explanation of symbols]

 1 Direction Sensor 2 Distance Sensor 5 GPS Receiver 6 CD-ROM Drive 7 CD-ROM 8 Display / Operation Unit 8A Display 8B Touch Panel 9 Device Main Body 15 Image Processor 101 CPU 111 Program ROM

Claims (1)

[Claims] 1. A vehicle position detecting means for detecting a vehicle position, a map display data storing means for storing road information and a place name, a place name and a facility name are indexed, and a position pointed to by the place name and a facility name is coordinate data. Index data storage means for storing as
Means for selecting a region or facility and reading coordinate data from the index data storage means; display means for reading and displaying map data corresponding to the read coordinate data from the map display data storage means; First determining means for determining whether or not there is an index acquisition character string that is the selected place name or facility name in the selected map display data; and when the first determination means determines that there is an index acquisition character string, the reading is performed. The distance between the issued coordinate data and the corresponding display position of the index acquisition character string in the map display data is calculated, and the display screen of the display means is centered on the coordinate data of the index data storage means from the calculation result. Second determining means for determining whether or not the index acquisition character string of the map display data is displayed when displayed on the screen, and the character string is displayed on the display screen by the second determining means. When it is determined that the character string is emphasized and displayed, when the first determination means determines that there is no index acquisition character and when the second determination means determines that the character cannot be displayed, it is displayed in the center. A traveling position display device, comprising: a display control unit that emphasizes and displays a character string.