JPH03137679A - Navigation device for moving body - Google Patents

Abstract

PURPOSE:To display a map screen of high visibility by displaying one of different combinations of color codes for showing display colors of plural map elements, respectively, when one of a first and a second color code storage means is selected. CONSTITUTION:At the time of starting an automobile, a departure spot is set onto an area map by operating a navigation 11. When a switch SW1 is operated, a menu, and a set pattern of a map selection and the present position are displayed on a CRT. As a result, a map display mode is started, and when a first color code storage means for selecting a map in a CD ROM 25a is selected, a map in a CD ROM 25a is selected, a principal road, a detailed road and a bridge are displayed in red, green and yellow, respectively on a screen. On the other hand, when a second color code storage means is selected, a color code including the detailed road is switched, and they are displayed in many colors being different from the previous ones.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a navigation device installed in a moving body such as an automobile, and in particular, displays a map, the current position of the automobile, a traveling trajectory, etc. on a display such as a cathode ray tube. The present invention relates to a navigation device for a mobile body that displays driving information to a driver.

[Conventional technology]

Navigation devices installed in moving objects such as automobiles are
Generally, a national map, a regional map divided into multiple parts, etc. is stored as map information in a map storage means, and the above map information is read out in response to an operator's request and displayed on a display such as a cathode ray tube. It now provides a map for driving.

In addition, by calculating the current position of the vehicle based on detection signals from a distance sensor that detects the distance traveled by the vehicle and a direction sensor that detects the heading direction, the current position of the vehicle is displayed on the map displayed on the display. The triangular mark indicating the position and the travel trajectory are displayed as a plurality of consecutive points, so that the position of the own army on the map on the screen can be visually recognized (for example, Japanese Patent Application Laid-Open No. 58-53711, Japanese Patent Publication No. 59-39)
800, JP-A-60-165511)
.

Incidentally, in this type of device, items such as expressways, national roads, bridges, etc., which are map elements of a map, are broken down into types and coordinates and stored in the storage means. When displaying the map on the display screen,
The above type and coordinate data is read out, and each item is displayed in a different color on the display map.

[Problem to be solved by the invention]

However, since the conventional device described above usually has only one memory table as a map data storage means, it is not possible to change the display color of the map and items displayed on the screen. Therefore, when the incident light applied to the display changes depending on whether it is exposed to direct sunlight during the day or at night, or during cloudy, rainy, or snowy weather,
The color tone of the screen may vary significantly, and in this case, the visibility of the screen is significantly reduced.

This invention has been made in view of the above problems, and improves visual recognition by selectively displaying each color of the map and map elements displayed on the screen in different colors according to changes in the surrounding environment of the display device. An object of the present invention is to provide a navigation device for a mobile body having a display device with excellent performance.

[Means to solve the problem]

A navigation device for a mobile body according to the present invention includes a map information storage means that stores type data and coordinate data obtained by decomposing a plurality of map elements constituting a map into types and coordinates, and respectively encodes the types, and displays the map. a display device having a screen; a first color code storage means provided corresponding to each type of the plurality of map elements, and storing color codes each indicating a display color of the plurality of map elements; and the plurality of maps; A first color code is provided corresponding to each type of element, and stores a color code indicating the display color of the plurality of map elements and having at least one combination different from the combination of each color code of the first color code storage means. a second color code storage means, a selection means for selecting one of the first and second color code storage means, reading out the type data and coordinate data from the map data storage means, and selecting the selection means; The map includes drawing means for reading color codes corresponding to each type of map element stored in the color code storage means and drawing the map on the display.

[Effect]

In the present invention, when the first color code storage means is selected from among the first and second color code storage means,
Provided corresponding to each type of multiple map elements,
Color codes each indicating the display color of a plurality of map elements are read out and drawn on the screen of the display device.

On the other hand, when the second color code storage means is selected, a color indicating the display color of a plurality of map elements and having at least one combination different from the combination of each color code of the first color code storage means is selected. The code is read and drawn on the screen.

Therefore, different display colors of map elements are displayed on the screen according to the operator's selection.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is an overall configuration diagram of a mobile navigation device, FIG. 2 is a front view of a display, and FIG. 3 is a schematic configuration diagram for explaining the present invention in detail.

In the figure, (1) is a control section with 110 various circuits (
2), (3), (4) and input/output ports (5), (6
), a CPU (7), a CRT-C (91, etc.) are operated by receiving stabilized power from the vehicle battery via a constant voltage circuit, and control various devices.

(2) is the first I10 interface circuit, which includes a navigation (11) that guides the driving of the vehicle, a traffic information (12) that receives road conditions, and a wireless telephone (13) for the car.
), air conditioner for indoor air conditioning (14), TV (t5), radio (16), tape (17), CD (18), etc., which are video and audio sources, etc., using function switches (SWI) to (SW8). It is possible to select it via .

These function switches (SWI) to (SW8) are installed on the front panel (26b) of the CRT (26) shown in FIG.
The drive signal is sent to the CPU by pressing the button.
(7) to operate each device.

In addition, the first I10 interface circuit (2) includes:
A GP that receives radio waves from artificial satellites via an antenna and can confirm and determine the current location and moving speed of a vehicle.
The S device (19) and a flux-kent type geomagnetic detector fixed to the vehicle separate and detect the geomagnetic field into a component in the vehicle's traveling direction and a component perpendicular to the component, and a signal corresponding to this component is sent to detect the component in the vehicle's traveling direction. A direction sensor that outputs the direction θ (
20) are connected.

(3) is the second I10 interface circuit, to which is connected a distance sensor (21) that outputs a pulse signal proportional to the number of wheel rotations using a vehicle speed sensor that detects wheel rotation using an electromagnetic pickup, reed switch, etc. has been done. Note that the current position data of the vehicle is obtained by the azimuth sensor (20) and the distance sensor (21), and
This constitutes a current position detecting means that can obtain travel trajectory data.

(4) is the third I10 interface circuit, which is used for video φ of the TV tuner (22), radio tuner (23), tape deck (24), CD deck (25), etc.
Audio equipment is connected. This CJ) Detsuki (25)
is equipped with a CD-ROM (25a) which is a map storage means, and when the above-mentioned navigation (11) is selected, various map information and line diagram data, etc., which will be described later, are read out and stored in the CD-ROM (25a).
It can be displayed on RT (26). In addition, the above CD
・ROM (25a) Toshiteha, NIKKBl, ELEC
TRONIC3, November 26, 1987 issue (NO43
The memory for storing map information described in 4) is adopted,
Map information such as national maps, local maps, regional maps, and even district maps is stored as vector data. Further, in this example, there are three types of maps, wide area, standard, and detailed, each having a different scale, and this map information is stored so as to include a common area. The above district map is divided into four areas corresponding to the four quadrants of the screen (26a) of the CRT (26), and the four map blocks are considered as partial maps, and one map block that is a part of this partial map is The data is stored as map information on the above-mentioned CD/ROM (
25a). In addition, line diagrams connecting points on this district map, such as line diagrams showing roads, rivers, bridges, etc., are decomposed into line diagram data and stored, as well as character data such as letters and symbols, and service symbols. Service data of hotels, golf courses, etc. is also stored. For specific items such as roads, rivers, and bridges, color palettes are stored in a plurality of color codes in order to display them in various colors. In addition,
In this color palette, multiple map elements such as main roads (Ll), detailed roads (L2), and bridges (L3) are broken down into types and coordinates, and each coded type data and coordinate data are stored. There is. Moreover, in order to be able to display the above-mentioned items in other colors in addition to this color code, it has a plurality of memory tables in which a large number of color palettes are stored in color codes. Further, dot data is used to cast a shadow over the entire screen (26a) during map playback and drawing, and dot data is also used to cast a shadow on the area where an icon, which is a touch pattern, is displayed on the screen (26a). are respectively memorized.

(7) is the CPU, and the function switch (
The operation of the video/audio equipment is controlled based on the selection operations of SWI) to (SW8), and the operation of the above-mentioned CD-ROM (25
Read the map information etc. from a) and display it on the CRT (26) screen (
26a) to display the control signal on the CRT-C(
9).

It also receives a pulse signal from the distance sensor (21), a GPS signal from the GPS device (19), and a digital signal of X and Y components from the direction sensor (20) through the IRT (interrupt circuit) (7a). Then, arithmetic processing is performed to determine the travel trajectory and current position, which are travel route information, and a display signal is output.

(8) is a temporary storage RAM which is a time storage means, and as shown in the schematic diagram of FIG. Power is constantly backed up from the on-vehicle battery so that read data can be temporarily stored and retained. When map information is read out, line drawing data is also read out, and when a desired map is selected, data is taken out so that various line drawings are superimposed on the map. In addition,
This RAM (8) contains the above-mentioned CD-ROM (25, a).
The coordinates of the current position stored in the first memory table of (
XO, YO) is stored in the center of the screen (26a), and when this current position data is read out, the screen (26a)
) is displayed as a current position mark (M). Also, the screen (26a) of the above CRT (26)
) is equipped with a memory table for storing position data, and in this example, the above-mentioned CD-RO
It has a plurality of endless memory tables corresponding to map information of maps of different scales stored in M (25a).

(9) is a CRT-C which is a display control means and a drawing means.
(CRT controller) receives a command for outputting a display signal from the CPU (7) and expands the travel route information into the display RAM (10), and also stores the expanded map data, character data, and It outputs a video signal and a synchronization signal for displaying travel route information and the like on the CRT (26). In addition, the above CPU (
7) is the map information corresponding to one specified scale among the partial map information, wide area, standard, and detailed map information that are the above four map blocks stored in the CD-ROM (25a), and this map information. Travel locus information comparable to the above is read from the memory table of the RAM (8), and the travel locus is displayed superimposed on the diagram on the map.

(lO) is a display RAM, in addition to additional information such as the map number and scale type, pattern data for displaying the operation keys for driving the various devices mentioned above as double switches on the screen (26a). is stored. This pattern data includes the current position mark (M) displayed as a triangle on the screen (26a) of the CRT (26) (see Figure 3), and a mark (M) for displaying the travel trajectory as a plurality of consecutive points (dots). The trajectory display pattern which is the first mode and the trajectory non-display pattern which is the second mode for erasing the displayed trajectory from the screen (26a) are the switching means that provides a switching signal to the CPU (7), that is, the touch switch. is remembered as.

Although not shown, there is also a scroll key pattern constituting a map moving means for arbitrarily moving the map displayed on the screen (26a), and the current position mark (M) displayed on the screen (26a). A correction position mark that is a correction position mark display means for correcting a position, a return pattern that is a map movement return means that returns a moved map to its original position, and a correction position mark that is used when the current position mark (M) is moved. A correction pattern, etc., which is a current position mark correction means for moving the current position mark to the position of the position mark, is stored. moreover,
Although not shown, enlargement and reduction patterns for specifying the map scale are also stored.

Next, the CRT (7), CRT-C (9), and display RAM (10) will be described in detail with reference to FIGS. 11 and 12.

In FIG. 11, (7b) is a display control unit (MPU) of the CPU (7), a data processing unit (not shown) and a CR
This CRT transmits and receives signals to and from the T-C (9).
-Output a display signal to C(9). (9) is CR
The T-C receives the display signal and transmits the map data, driving route information, character data, etc. to the CRT.
Horizontal synchronization signal ()ISYN to display on (26)
C) and a vertical synchronization signal (VSYNC).

(31) is a first frame memory, which has a plurality of memories in which various map information corresponds to three primary colors (red, green, blue), and when the above map data and line diagram data are read out, The map is now displayed in color. (
32) is a second frame memory in which current position data, travel trajectory data, etc. are stored as the travel route information. Parallel/serial converters (33) and (34) convert parallel signals from the first and second frame memories into serial data using a dot timing clock, respectively. (35) is a multiplexer that transfers the address signal from the CRIJ (7) and the address signal from the CRT-C (9) to the CPU (
7), and a signal designating a palette number is given to a color palette 36, which will be described later. (36) is a color palette,
Details will be explained based on FIG. 12.

That is, the color palette (36) includes main roads (Ll), detailed roads (L2), and bridges (L1) with different line types.
A first color code storage means assigning color codes 0OFH, FOFH, 08FH, etc. to each item such as L3) in the order of red, green, yellow, etc.; Color code 0 above in order
OFH, 888) The second assigned 1.08FH...
color code storage means. Thereby, the first color code storage means and the second color code storage means have at least one different combination of color codes.

Furthermore, in this example, a plurality of color code storage means are provided corresponding to each of the above-mentioned items, each having at least one combination different from the color code of the first color code storage means.

Note that each of the color code storage means is switched and selected by a selection means. Although not shown, this selection means is a switch consisting of a movable contact and a plurality of switching contacts, and is a switch that is not shown in the figure.
b). Then, by manual operation, the above C
By applying a switching signal to the PU (7), it is possible to select either the first color code storage means or the second color code storage means.

By the way, (26) shown in FIG. 1 is a display device CR.
T, the video signal from the CRT-C (9) (
) ISYNC) and a synchronization signal (vSYNC) to display a map of a specific area, driving route, current location, etc. in color. In addition, various operation keys of the touch switch section, which will be described later, are displayed in a predetermined touch area, and it is also possible to turn on the TV tuner (22) and display TV images by pressing the function switch (SW5). There is.

(27) and (29) are connected to the CPU via the output port (6).
(7) is a light emitting unit connected to the CPU (7), and (28) and (30) are light receiving units connected to the CPU (7) via the input board (5), which are arranged on the surface of the CRT (26). and
It constitutes the touch panel section of the touch switch. Although not shown, this touch panel section is divided into a large number of touch areas in the row direction and column direction, and when a specific touch area among these touch areas is touched, the touch area in the row direction Infrared light passing through the intersection with the column direction is cut off, and drive signals giving various instructions are output. Specifically, the screen (26
If you touch a), the above operation pattern will be displayed on the inner periphery of the screen (26a), and if you touch any of these patterns, you can set the operation start and stop of each device, and set the time, numerical value, etc. It is something that can be done.

Next, the operation of the mobile navigation device configured as described above will be explained with reference to the flowcharts shown in FIGS. 4, 8 to 12.

First, when a key switch is turned on at the start of driving a car, the electric system of each part becomes operational by receiving power from the car's on-board battery. When the CPU (7) of the control unit (1) is powered on, it is activated by the stabilized power supply and the fourth
Initialization is performed in step Sll of the flowchart shown in the figure, and the arithmetic processing shown in the main routine of the figure is repeated at a cycle of about several tens of m5ec. Next, function key processing is performed in step S12, and then,
Touch switch input processing is performed in step S13. At this time, in step S14, for example, when the operator presses the function switches (SW6), (SW4) of the radio (16), air conditioner (14), etc., the process proceeds to step S15, and the screen of the CRT (26) (
In 26a), a radio mode pattern as shown in FIG. 5 or an air conditioner mode pattern as shown in FIG. 6 is displayed. Then, by touching the area of the switch pattern provided on the display screen of each mode, the selected device can be operated at the desired set speed. Note that even during such an operation, the process proceeds to step S16,
CPU (71 executes current position calculation processing, etc.).

First, as shown in the flowchart of FIG. 8, when a pulse signal is output from the distance sensor (21), in step S21, an interrupt calculation of the current position is performed at a predetermined time interval. At this time, pattern data is read out based on the above calculation results, and a mark (
M) is displayed on the screen (26a) and updated over time. Then, in step S23, the current position data and traveling trajectory data obtained by this calculation are sequentially stored in the temporary storage RAM (8). As a result, when the vehicle starts traveling, travel route information such as the travel distance to the current location and the travel trajectory can be obtained.

First, when the car is driven, a pulse signal is output from the distance sensor (21) as shown in the flowchart of FIG.
given to. Then, the CPU (7) adds the number of pulses N and calculates the distance traveled up to the present time (
Step 531).

Next, as the automobile travels, an interrupt processing routine shown in the flowchart of FIG. 1O is started.

First, in step S41, for a certain period of time, for example, 1
Read the number of pulses N from the vehicle speed sensor every second.

Next, in step 342, the number of pulses N at this time,
By multiplying by the unit traveling distance d, for example, 39.25 cm, the traveling distance for each fixed period of time is determined.

Then, in step S43, the direction θ from the direction sensor (20) is read.

Next, in step 344, this direction θ and the travel distance θ are determined.
The position of the vehicle on the two-dimensional coordinates is determined from the following equation.

After this, in step 345, the coordinates calculated above (△X,
The current position (x, y) of the vehicle is determined from the coordinates (xo, yo) of the starting point using the following equation.

As a result, the distance traveled to the current position, which changes every moment, is obtained, and the latitude and longitude are determined at regular intervals, making it possible to know the current position (x, y). Note that this data is sent to temporary storage RAM (8) and stored sequentially, but in this RAM (8), the current position (x
, y) is written, while old data is erased one after another, resulting in a so-called endless method. Furthermore, even if the vehicle is stopped and the key switch is turned off, the current position (x, y) and distance traveled data can be retained.

Note that in step 346, the count of the number of pulses N is cleared. Next, step S4? If you proceed to
Upon receiving the GPS signal from the above GPS device (19), the
Arithmetic processing for performing S processing is executed. As a result, the absolute values of the latitude and longitude are determined every fixed period of time, for example, every second, so that the traveling route information can be corrected.

After this, in step 348, the formula "
Calculation processing is performed based on =;'r, and the vehicle speed V is determined.

By the way, when starting the car, the user operates the navigation system (11) to set the departure point at predetermined geographical coordinates, for example, one's home on a detailed district map.

Now, when the function switch (SWI) of the navigation (11) is pressed, a menu will be displayed on the screen (26a) of the CRT (26), as shown in Figure 7, showing map selection and current position. The setting pattern that is the touch area is displayed.

As a result, the map display mode is started, and step S5
When the menu is displayed on the screen (26a) in 1,
When the map selection setting pattern is touched, the map information is read out from the first frame memory (31) that stores the map information, and as shown in FIG.
The desired map will be displayed on the screen (26a) of (26).

By the way, in the navigation mode, the eighth
The calculation process shown in the flowchart in the figure continues.
In this state, the map and items are displayed in the color (table color) of the storage means that corresponds to the previously selected color code (step 523).

That is, the map information read from the ROM (25a) is sent to the CRT (26) and drawn on the screen (26a), and the type data and coordinate data that are map elements are also read and displayed over the map. has been done. Here, if the first color code storage means is selected, the first color code storage means is selected.
The map on the screen (2ea) shown in Figure 3 includes major roads (Ll
) will be displayed in red, the detailed road (L2) in green, and the bridge (L3) in yellow.

Next, in step S24, it is determined whether a switch selection operation has been performed. Here, if there is no switch operation, the display is performed in the above color, but when a selection operation is performed, the color code storage means corresponding to the number of the switch is selected. At this time, if the second color code storage means is selected, the detailed road (L
Color codes including 2) are switched along with other items. As a result, the displayed map on the screen (26a) is displayed in many different colors than before.

As described above, this embodiment includes a first color code storage means that stores a plurality of color codes respectively provided corresponding to a plurality of items displayed overlappingly on a map, and a combination of each color code of the storage means. The screen is equipped with a plurality of color code storage means each storing color codes each having a different combination. (26a) The map can be displayed in the desired color.Therefore, the map can be displayed in the color according to the user's preference, so there is no need to keep viewing the screen with a color that makes the user feel disgusted. Problems such as not being able to do so will be resolved.

In addition, since the optimal color can be set according to environmental changes such as day/night and weather, visibility can be improved and this has the effect of contributing to safe driving.

〔Effect of the invention〕

In the present invention, when one of the first and second color code storage means is selected, on the screen of the display device,
It is possible to display on the screen map elements in which at least one of the combinations of color codes each indicating the display color of a plurality of map elements is different. This allows drawing to be performed using different color code combinations according to the operator's selection.
Since the map surface can be displayed in various colors, it is possible to select a color according to the surrounding environment of the display device.

Therefore, when the moving object is a vehicle, a map surface with good visibility at all times can be provided, which has the effect of leading to safe driving.

[Brief explanation of the drawing]

1 to 13 show an embodiment of the present invention,
Fig. 1 is an overall configuration diagram, Fig. 2 is a front view of the display, Figs. A flowchart showing the entire arithmetic processing of the routine, Figures 5 to 7 are explanatory diagrams of various menus displayed on the display screen, Figure 8
FIG. 9 is a flowchart showing calculation processing for displaying the current position of navigation and map display; FIG. 9 is a flowchart showing calculation processing based on the distance pulse from the distance sensor;
Figure 10 is a flowchart showing an interrupt calculation routine based on the distance pulse from the distance sensor and the signal from the direction sensor. Figure 11 is a detailed electrical block diagram of the control section in Figure 1. Figure 12 is in color. Detailed illustration of the pallet,
FIG. 13 is a diagram showing a map and diagram screen displayed on the display. In the figure, (1) is the control unit, (7) is the CPU, (8
) is the time storage means (RAM), and (9) is the drawing means (CR).
T-C), shout is RAM for display, (11) is navigation, (20) is direction sensor, (21) is distance sensor, (25a) is map data storage means (CD-ROM)
, (26) is a display (CRT), (31). (32) is a frame memory, (35) is a multiplexer, (36) is a color palette, (Ll) is a main road, (
L2) is a detailed road. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] (1) A map information storage means that stores type data and coordinate data obtained by decomposing a plurality of map elements constituting a map into types and coordinates and coding them respectively; a display device having a screen for displaying the map; a first color code storage means that is provided corresponding to each type of the plurality of map elements and stores color codes each indicating the display color of the plurality of map elements;
The first color is provided corresponding to each type of the plurality of map elements, and indicates the display color of the plurality of map elements.
a second color code storage means storing a color code having at least one combination different from the combination of each color code of the color code storage means, and one of the first and second color code storage means. a selection means for reading out the type data and coordinate data from the map data storage means, reading out the color code corresponding to each type of the map element stored in the color code storage means selected by the selection means, and displaying the display on the display; A navigation device for a mobile body, comprising a drawing means for drawing the above-mentioned map.