JPH07332991A - Running position display device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a traveling position display device capable of enlarging and displaying only an arbitrary part on a map being displayed. [Structure] Pressed point detection means 26 for detecting that an arbitrary point on the map being displayed on the display means 24 has been pressed, and area designation for specifying a predetermined area including the arbitrary point on the pressed map Means 27, enlargement processing means 28 for enlarging map data corresponding to the designated area to generate enlarged map data, and when the depression point detecting means 26 detects depression of an arbitrary point, the display is performed. The signal processing means 25 for displaying an enlarged map based on the enlarged map data is provided on the map displayed on the means 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
That is, the present invention relates to a traveling position display device that displays a vehicle position and a map around the vehicle position on a display device.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing an outline of a general traveling position display device.

In the traveling position display device shown in FIG.
Is an azimuth sensor, and the azimuth sensor 1 uses a geomagnetic sensor for detecting the absolute traveling azimuth of the automobile and an optical gyroscope for detecting the relative traveling azimuth of the automobile. Reference numeral 2 is a distance sensor that detects the traveling distance of the vehicle by counting the number of pulses corresponding to the wheel rotation speed of the vehicle, and 3 is an ON / OFF signal for a brake switch, a parking switch, etc. These are various sensor signals such as signals.

Reference numeral 4 is a sensor signal processing unit for processing various sensor signals from the direction sensor 1, distance sensor 2 and the like, and 5 is a GPS (Global Positioning System) receiver. The GPS receiver 5 is transmitted from a plurality of GPS satellites. The reception point position (latitude, longitude), that is, the position of the own vehicle can be calculated by receiving and calculating the received radio wave. Reference numeral 6 is a CD-ROM drive, and the CD-ROM drive 6 is a C in which map data is recorded.
The map data is read from the D-ROM 7.

Reference numeral 8 denotes a display / operation unit installed in the passenger compartment of the vehicle. The display / operation unit 8 is a liquid crystal display for displaying the current traveling position, traveling direction of the vehicle and a peripheral map at the current traveling position. 8A and a touch panel 8B provided on the front surface of the liquid crystal display 8A.
The touch panel 8B has a scale change switch for instructing enlargement and reduction of the displayed map, a route search switch for instructing a route corresponding to the shortest distance to the destination, and the liquid crystal display 8A. It has a switch for selecting a destination from the displayed place names, a switch for inputting an address of the destination, and a traveling locus display switch for displaying a traveling locus on the liquid crystal display 8A. Reference numeral 9 denotes a main body device, and the main body device 9 is arranged in a trunk room of the automobile.

Next, the internal structure of the main body device 9 will be described. Reference numeral 10 is a central processing unit (hereinafter simply referred to as CPU) that executes various calculations, 11 is a program ROM in which programs for various calculations executed by the CPU 10 are stored, and 12 is the orientation sensor 1 , Distance sensor 2, GPS receiver 5, CD-ROM 7
A dynamic RAM (hereinafter, simply referred to as a DRAM) that stores various data from the above, the calculation result calculated by the CPU 10, and the like, and 13 is necessary even when the power supply to the main body device 9 is stopped. Static RAM (hereinafter, simply referred to as SRAM) as a backup memory for storing and holding various data.

Further, 14 is a kanji character / pattern in which patterns of characters and symbols displayed on the liquid crystal display 8A are stored.
A font ROM, 15 is an image processor that generates a display image based on the map data, the vehicle position data, and the like, 16 is a video RAM (hereinafter, simply referred to as VRAM), and the VRAM 16 is the image processor. The map data, the vehicle position data, and the data obtained by combining the kanji and font such as the place name and the road name output from the kanji and font ROM 14 generated in 15 are stored, and these data are edited to edit the liquid crystal. The coordinate system is converted so that it is displayed on the display 8A. 1
Reference numeral 7 denotes an RGB conversion circuit that converts the output data of the VRAM 16 into drawing data that is a color signal.
The B conversion circuit 17 outputs and outputs the converted color signal from the liquid crystal display 8A, and 18 is a communication interface.

Next, the data format of the map data recorded on the CD-ROM 7 read by the CD-ROM drive 6 will be described. Figure 6 is the C
It is a data format of the map data recorded in the D-ROM 7.

In FIG. 6, 20 is a disk label and 2 is
1 is drawing parameter, 22 is leaf management information, 23 and 2
Reference numeral 4 is a map leaf. Background data, character data, road data, etc. are recorded in these map leaves, which will be described later. For example, data for each unit map obtained by dividing a topographic map of Japan by latitude and longitude. Are recorded respectively.

Further, these map leaves 23 and 24 are set from map leaves 23 (level 2) in which a wide area is roughly recorded to map leaves 24 (level 0) in which a narrow area is recorded in detail. Each of these map leaves is composed of map display levels A, B, and C that record the same area.

Each of these map display levels A, B and C is A
From B to C, the map in the same area is recorded in more detail in the order of B to C, and is composed of map display level management information and a plurality of units.

Further, the unit records a divided area obtained by dividing each area of each map display level A, B, C into a plurality of areas. Each unit has a unit header, a character layer, a background layer, a road layer, and It is composed of option layers.

In the character layer, place names, road names, facility names, etc. displayed on the map are recorded, and in the background layer, data for drawing roads, facilities, etc. is recorded.

As the road layer, data on coordinate points (hereinafter referred to as nodes) and lines (hereinafter referred to as links) that record roads including intersections, such as node numbers, latitudes, longitudes, and links, are stored. The link number and the link distance on the link are recorded. FIG. 7 is a block diagram schematically showing the road layer.

In FIG. 7, the road layer has white circles as nodes, lines between the nodes as links, and black circles as intersection nodes. The data recorded in the road layer is displayed on the map displayed on the liquid crystal display 8A. It is not directly involved and is used as road network information such as map matching.

Next, the main operation of the traveling position display device will be described with reference to FIG.

In FIG. 5, the CPU 10 supplies the output signals of the azimuth sensor 1 and the distance sensor 2 via the sensor signal processing unit 4, calculates the vehicle position data based on the output signals, and The calculated vehicle position data is corrected based on the data from the GPS receiver 5.

Based on the vehicle position data thus calculated, the CPU 10 uses the CD-ROM 7 to obtain map data of the unit corresponding to the vehicle position from the CD-R.
The map data read by the OM drive 6 is read through the communication interface 18 to the DRA.
Store in M12.

The CPU 10 reads only a part of the map data stored in the DRAM 12, and supplies the read map data to the image processor 15. The image processor 15 generates image data based on the map data, and if the map data read from the DRAM 12 includes a character code or a symbol code, the image processor 15 corresponds to the character code and the symbol code. The pattern is read from the Chinese character / font ROM 14, the image data is generated in accordance with the pattern, and the generated image data is supplied to the VRAM 16.

The VRAM 16 stores the image data, coordinates the image data so that the stored image data can be displayed on the liquid crystal display 8A, and converts the coordinate-converted image data into an RGB conversion circuit. Supply to 17.

The RGB conversion circuit 17 converts the coordinate-converted image data into a color signal and supplies it to the liquid crystal display 8A. On the liquid crystal display 8A, a map of a predetermined range centering on the vehicle position is displayed, and a place name, a symbol, etc. related to the map are displayed.

Further, the position of the vehicle displayed on the liquid crystal display 8A is sequentially changed based on the traveling speed and the traveling direction which are sequentially calculated as the vehicle travels.

Next, the operation of the conventional scale switching display processing in the traveling position display device will be described. Figure 8
6 is a flowchart showing the processing operation of the CPU 10 in the scale switching display processing.

The scale switching display process is a process of enlarging and displaying the map display being displayed on the liquid crystal display 8A according to the scale switching switch of the touch panel 8B.

In FIG. 8, when the CPU 10 receives an input for selecting the display scale on the map being displayed on the touch panel 8B during the map display on the liquid crystal display 8A (step S11), the selected display scale is selected. From the CD-ROM 7 to the map data related to
The M drive 6 reads the map data (step S12), and in order to display the read map data on the liquid crystal display 8A, coordinate conversion is performed on the image data related to the map data in the VRAM 16 (step S13).
The coordinate-converted image data is converted by the RGB conversion circuit 17 into a color signal, that is, drawing data (step S14), and a map is displayed on the liquid crystal display 8A based on the drawing data (step S15).

Next, the CPU 10 is the CD-ROM.
The drive 6 reads the road network data from the road layer recorded in the CD-ROM 7 (step S
16) determine the vehicle position and vehicle direction based on the read road network data and the vehicle position data calculated by the CPU 10 (step S17), and display the map on the map displayed on the liquid crystal display 8A. The vehicle mark corresponding to the vehicle position is displayed (step S18), and the processing operation ends.

Therefore, according to the scale switching display process of the conventional traveling position display device, the scale of the map being displayed on the liquid crystal display 8A can be freely changed by operating the scale switching switch of the touch panel 8B. Thus, a more detailed map can be displayed on the liquid crystal display 8A.

[0028]

However, according to the above-mentioned conventional traveling position display device, when an attempt is made to enlarge a part of the map being displayed on the liquid crystal display 8A,
The map data corresponding to the scale data selected by operating the scale changeover switch must be read from the CD-ROM 7, and the portion to be enlarged, that is, only the arbitrary portion is enlarged and displayed including characters and symbols. There was a problem that I could not do it.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a traveling position display device capable of enlarging and displaying only an arbitrary portion on a map being displayed. It is in.

[0030]

In order to achieve the above object, the first aspect of the present invention is to provide a vehicle position detecting means for detecting a vehicle position, and a map data recording medium for recording the map data. And a data reading unit for reading the map data corresponding to the detected vehicle position, the data reading unit reading the map data on the display unit based on the read map data, and displaying the map on the display unit. A traveling position display device having a signal processing means for displaying the vehicle position detected by the vehicle position detecting means on the map being displayed, the arbitrary point on the map being displayed on the display means. Pressing point detection means for detecting that is pressed,
An area specifying means for specifying a predetermined area including an arbitrary point on the pressed map, and an enlargement processing means for enlarging map data corresponding to the specified area to generate enlarged map data, The signal processing means is adapted to display an enlarged map based on the enlarged map data on the map being displayed on the display means when the depression point detecting means detects depression of an arbitrary point. is there.

According to a second aspect of the invention, in the configuration of the first aspect of the invention, when the enlargement processing means detects the depression of the arbitrary point, the enlargement processing means measures the depression time and designates it by the area designating means. The map data corresponding to the selected area is continuously expanded according to the pressing time to generate expanded map data.

[0032]

With such a configuration, according to the first aspect of the present invention, when an arbitrary point on the map being displayed on the display means is pressed, a predetermined range area including the arbitrary point is designated, Since only the map data corresponding to the specified area is enlarged and displayed on the map displayed on the display means, the map displayed on the display means can be displayed without changing the scale value of the map displayed on the display means. You can magnify only the upper part.

Further, according to the second aspect of the present invention, when only the arbitrary portion on the map being displayed is enlarged and displayed, the pressing time of the arbitrary point pressed is measured, and the measurement is performed. Since the arbitrary portion is continuously enlarged and displayed according to the pressing time, only the arbitrary portion on the displayed map is enlarged and displayed to a desired scale value according to the pressing time of the arbitrary point. be able to.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A travel position display device according to the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing a traveling position display device of the present invention. It should be noted that the same components as those of the general traveling position display device shown in FIG. 5 described in the related art are designated by the same reference numerals, and the description of the configuration and operation thereof will be omitted.

In FIG. 1, the traveling position display device of the present invention comprises a vehicle position detecting means 21 for detecting the vehicle position, a data reading means 23 for reading the map data from a recording medium 22 in which the map data is recorded, The data reading means 23 is caused to read the map data corresponding to the detected vehicle position, and the display means 24 is caused to display the map based on the read map data.
And a signal processing means 25 for displaying the detected position of the vehicle on the map being displayed on the map, and an arbitrary point on the map being displayed on the display means 24 is depressed. The pressed point detection means 26 for detecting that, the area designating means 27 for designating a predetermined area including the arbitrary point on the pressed map, the pressing time for the arbitrary point are measured, and the area designating means is designated. A map data corresponding to the designated area is continuously expanded according to the pressing time to generate expanded map data. The signal processing means 25 includes the pressing point detecting means. When the depression of an arbitrary point is detected at 26, the enlarged map based on the enlarged map data is displayed on the map being displayed on the display means 24.

In FIG. 5, the own vehicle position detecting means 21
Is an azimuth sensor 1, a distance sensor 2 and a GPS receiver 5
The recording medium 22 is the CD-ROM 7, the data reading means 23 is the CD-ROM drive 6, the display means 24 is the liquid crystal display 8A, and the signal processing means 2 is
5, the pressed point detection means 26, the area designation means 27, and the enlargement processing means 28 correspond to the CPU 10 and the image processor 15.

Next, the operation of the traveling position display device in the scale switching display process will be described. FIG. 2 shows the CPU 1 in the scale switching display processing of the traveling position display device of the present invention.
It is a flowchart which shows the processing operation of 0. According to the scale switching display process shown in FIG. 2, the processing operations of steps S11 to S18 are executed as described with reference to FIG.

In FIG. 2, the CPU 10 executes step S1.
After the processing operation of 8, it is determined whether or not an arbitrary point desired by the user on the display screen of the liquid crystal display 8A is pressed (step S19). When the arbitrary point is pressed, a predetermined range around the arbitrary point 30 is designated as the designated area 31 as shown in FIG. 3 (step S2).
0), to cause the CD-ROM drive 6 to read only the map data corresponding to the designated area 31 from the CD-ROM 7, and to enlarge and display the read map data on the liquid crystal display 8A. VRA
The coordinates of the map data are converted in M16 (step S21).

Incidentally, the map data read from the CD-ROM 7 is normally represented by the normalized coordinates of 8000H × 8000H, and in order to normally display this on the liquid crystal display 8A, 240 dots vertically × 320 dots horizontally. You have to convert it to coordinates. That is, when a designated area centered on the arbitrary point, that is, a rectangle represented by normalized coordinates of vertical X × horizontal Y is designated, the designated area is displayed in the vertical direction (equation 1) and in the horizontal direction (equation 2). ) And the dot coordinates.

[0040]

[Equation 1]

[0041]

[Equation 2]

Therefore, the enlargement of the designated area, which is the processing operation of step S21, is performed by converting the normalized coordinates into dot coordinates by expressing the dot coordinates with larger dot coordinates than in the case of normal display. Assuming that the pressing time is T and an arbitrary constant that defines the enlargement ratio is α, the vertical (αT + 1) X ′,
The dot coordinates are converted to horizontal (αT + 1) Y ′, and the designated area changes as the pressing time elapses.
It will be enlarged on the dot coordinate system.

When the map data is coordinate-converted in step S21 as described above, the map data coordinate-converted by the RGB conversion circuit 17 is converted into drawing data (step S22), and the converted drawing data is converted. Based on the above, the enlarged view 32 of the designated area as shown in FIG. 4 is overwritten on the map already displayed on the liquid crystal display 8A (step S23), and the process proceeds to step S19.

If the arbitrary point is not pressed in step S19, the processing operation is finished.

When the arbitrary point 30 in the enlarged view 32 displayed on the liquid crystal display 8A is pressed, the enlarged display can be returned to the normal display.

According to the traveling position display device of the above embodiment,
When an arbitrary point on the map being displayed on the liquid crystal display 8A is pressed, an area within a predetermined range centering on the arbitrary point is designated, and only the map data corresponding to the designated area is designated by the liquid crystal display. Since the enlarged display is made on the map being displayed on 8A, the liquid crystal display 8
It is possible to magnify and display only an arbitrary portion on the map being displayed without switching the scale value on the map being displayed at A, and as a result, the user can display small complicated roads or complicated roads on the map being displayed. Small and hard to read characters and symbols are easy to recognize.

Further, when only the arbitrary portion on the map being displayed is enlarged and displayed, the pressing time of the pressed arbitrary point is measured, and the arbitrary portion is continuously displayed according to the measured pressing time. Since it is designed to be magnified on the screen, it is possible to magnify only an arbitrary part on the map being displayed to a desired scale value according to the pressing time of the arbitrary point. You can improve the visibility of the map and concentrate on safe driving.

In the above embodiment, as shown in the flow chart of FIG. 2, after the processing operations of steps S11 to S18, designation of an arbitrary portion and step S19 to step of enlarging and displaying only the designated arbitrary portion. Although the processing operations up to S23 are executed, if the map is being displayed even if the processing operations of steps S11 to S18 are not executed, steps S19 to S19 are executed.
The processing operations up to 23 may be executed.

[0049]

According to the first aspect of the present invention configured as described above, when an arbitrary point on the map being displayed on the display means is pressed, a predetermined range of area including the arbitrary point is displayed. Is specified, and only the map data corresponding to the specified area is enlarged and displayed on the map being displayed on the display means, without changing the scale value in the map being displayed on the display means. It is possible to magnify and display only an arbitrary portion on the displayed map.

Further, according to the second aspect of the present invention, when only an arbitrary portion on the map being displayed is enlarged and displayed, the pressing time of the arbitrary point pressed is measured, and the measurement is performed. Since the arbitrary portion is continuously enlarged and displayed according to the pressing time, only the arbitrary portion on the displayed map is enlarged and displayed to a desired scale value according to the pressing time of the arbitrary point. be able to.

[Brief description of 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 flow chart showing a processing operation of a CPU in the embodiment.

FIG. 3 is a display diagram showing a display screen in a state where a designated area is designated in the embodiment.

FIG. 4 is a display diagram showing a display screen in a state in which an enlarged view is displayed in the embodiment.

FIG. 5 is a schematic block diagram of a conventional traveling position display device.

FIG. 6 is a configuration diagram of a data format of a conventional traveling position display device.

FIG. 7 is a configuration diagram showing a road layer of a conventional traveling position display device.

FIG. 8 is a flowchart showing a processing operation of a CPU of a conventional traveling position display device.

[Explanation of symbols]

 21 own vehicle position detecting means 22 recording medium 23 data reading means 24 display means 25 signal processing means 26 depressed point detecting means 27 area designating means 28 enlargement processing means

Claims (2)

[Claims] 1. A vehicle position detecting means for detecting a vehicle position, a data reading means for reading the map data from a recording medium in which map data is recorded, and map data corresponding to the detected vehicle position. The data is read by the data reading means, the map is displayed on the display means based on the read map data, and the vehicle position detected by the vehicle position detecting means on the map displayed on the display means. Is a traveling position display device having a signal processing means for displaying, and a pressed point detection means for detecting that an arbitrary point on the map being displayed on the display means is pressed, and the pressed map An area designating means for designating a predetermined area including an arbitrary point, and an enlarging processing means for enlarging map data corresponding to the designated area to generate enlarged map data. A means for displaying a magnified map based on the magnified map data on the map being displayed on the display means when the depression point detecting means detects depression of an arbitrary point. apparatus. 2. The enlargement processing means measures the pressing time when the pressing of the arbitrary point is detected, and obtains map data corresponding to the area designated by the area designating means according to the pressing time. The traveling position display device according to claim 1, wherein the enlarged map data is generated by continuously enlarging.