JPH03137678A - Navigation device for moving body - Google Patents

Abstract

PURPOSE:To evade confusing information and to increase the safety by setting trunk roads and non-trunk roads or only the trunk roads to a different color from the background when the at a stop state and in-traveling state of a vehicle are set in a 1st and a 2nd color code setting means, respectively. CONSTITUTION:When an automobile is started, a navigation device 11 is put in operation and its starting point is set on an area map; when a switch SW1 is operated, a menu, a map selection, and the setting pattern of the current position are displayed on a CRT 26. When the vehicle is at a stop, a vehicle speed sensor does not output a vehicle speed detection signal, so the 1st color code setting means is selected and map data and line drawing data are read out of a frame memory 31 to draw a map on the CRT 26 so that the background of the map is in blue, main roads are in red, and detailed roads are in green. When the vehicle travels, the 2nd color code means is set and the detailed roads are displayed in the same color with the background and erased from the map.

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, and a travel trajectory on a display such as a brown tube. The present invention relates to a navigation device for a mobile body that provides driving information to a driver by displaying the following information.

[Conventional technology]

Navigation devices installed on 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 brown tube. , to provide 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. A triangular mark indicating the position and the driving trajectory are displayed as a plurality of consecutive points, so that the vehicle's position on the map on the screen can be visually confirmed (for example, Japanese Patent Application Laid-Open No. 58-53711, Japanese Patent Publication No. 59-1983). 39
See Japanese Patent Publication No. 800 and Japanese Unexamined Patent Publication No. 165511/1983.

) In this type of device, when displaying a map on the screen, the line diagrams on the map, such as various roads, rivers, bridges, etc., are displayed in different colors on the map. A line diagram is stored as a plurality of line diagram data different from the background color of the map. For example, when the background color is blue, arterial roads such as national highways and local main roads are colored red, and non-arterial roads such as general local roads and alleys are colored green, so that each road can be clearly identified. There is.

[Problem to be solved by the invention]

However, in the above-mentioned conventional device, when viewing the map on the screen while driving, the driver's attention may be impaired and safety may be reduced. In other words, when a driver wants to check where he is going, he usually stops the vehicle and checks the route from the main road to the detailed road on a map.When driving, he sometimes visually checks the main road. People often drive while driving.

Therefore, there is no problem in looking at the map on the screen while the vehicle is stopped, but when you look at the map on the screen while driving, you will be able to see detailed non-arterial roads. The time it takes to check this can lead to inattention to the road ahead, which may impede safe driving.

This invention has been made in view of the above-mentioned problems.The background of the map and the road, which are displayed in a different color from the display screen, are displayed in different colors when the moving object is stopped, and when the moving object is moving, the map background and roads are displayed in different colors. By displaying the background color of the road and the non-arterial road in the same color, the purpose is to prevent confusing information from being given to the driver of the mobile object and to improve safety during driving operations.

[Means to solve problems]

The mobile navigation device according to the present invention has a map information storage means that stores arterial road data and non-arterial road data in which arterial roads and non-arterial roads in the map are coded, respectively, and a screen for displaying a map. a display device, first and second color code storage means provided corresponding to the arterial roads and non-arterial roads and for storing color codes indicating the display colors of each of the roads, and the map information storage means. display control means for reading out each of the road data from above and displaying each road on the display device based on the color code stored in the corresponding color code storage means; a first color code setting means for setting first and second color codes respectively indicating different first and second display colors in the first and second color code storage means; and the first color code setting. a second color code setting means for setting the same color code as the background color of the screen in the second color code storage means among the color code storage means set by the means; and the first and second color code settings. The apparatus is provided with a selection means for selecting one of the means and causing the display control means to perform display.

[For production]

In this invention, when the first color code setting means is selected among the first and second color code setting means, first and second color code setting means are selected, which are different from the background color of the screen, and also different from each other. Two color codes are set in the first and second color code storage means. Along with this, the screen will display the color that corresponds to each color code, but if the first color code corresponds to a highway and the second color code corresponds to a non-arterial road, the screen will display the color that corresponds to each color code. , arterial roads and non-arterial roads are displayed in a different color from the background color.

Next, when the second color code setting means is selected, among the color code storage means set by the first color code setting means, the second color code storage means stores the same color as the background color of the screen. Color code is set. Therefore, on the screen, only the main passage, which is the first color code, is displayed in the same color as the background color.

〔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 boats (5), (6
), and the CPU (7), CRT-CT9), etc. are supplied with stabilized power from the vehicle battery via a constant voltage circuit to operate 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), television (15) as a video and audio source, radio (16), tape (17), CD (18), 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.
(71) 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 Ilo, an interface circuit,
A distance sensor (21) is connected that detects the rotation of the wheel using an electromagnetic pickup, a reed switch, etc., and outputs a pulse signal proportional to the number of rotations of the wheel using a vehicle speed sensor that constitutes a selection means. In addition, the above direction sensor (2
0) and a distance sensor (21) to obtain current position data of the vehicle as well as current position detecting means capable of determining travel trajectory data. (4) is the third I10 interface circuit, which is a TV tuner (
22), radio tuner (23), tape deck (24)
) and video/audio equipment such as a CD deck (25) are connected. This CD deck (25) is equipped with a CD-ROM (25a) which is a map storage means, and when the above-mentioned navigation aυ is selected, various map information and diagram data, etc., which will be described later, are read out and transferred to the CRT (26). It is said that it can be displayed on.

The above CD-ROM (25a) is from NIKK.
B.I.

BLBC TRONIC 3, November 26, 1987 issue (
The memory for storing map information described in No. 434) is adopted, and 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 the l map block that is a part of this partial map is The data is used as map information on the above CD-ROM so that the background of the screen (26a) of the CRT (26) is 4 times
The data are sequentially stored in the 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.
Character data such as letters and symbols, and service data such as hotels and golf courses are also stored as service symbols. 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 the case of roads, arterial roads such as national highways and major local roads are treated as main roads, and non-arterial roads such as construction roads and alleys are displayed as detailed roads, and each is displayed in a color different from the background of the screen (26a). Therefore, as shown in Table 1 below, each item is stored in correspondence with a pallet number θ to 15.

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 for applying a shadow to the screen (26a) and dot data for applying a shadow to an area where an icon, which is a touch pattern, is displayed on the screen (26a) are stored, respectively.

(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 and 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. Note that this RAM (8) contains the above-mentioned CD-ROM (25a).
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 (CRT controller) which is a display control means, and receives a command for outputting a display signal from the CPU (7) and outputs travel route information to an RA for display.
M (lO), and the expanded map data, character data, driving route information, etc. are transferred to CRT (
26) outputs a video signal and a synchronization signal for display. In addition, the above CPU (71 is CD-
Among the above four map blocks stored in the ROM (25a), such as partial map information, wide area, standard, and detailed map information, map information corresponding to one specified scale and travel trajectory information comparable to this map information. is read out from the memory table of the RAM (8), and the traveling locus is displayed superimposed on the line diagram on the map.

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

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 control unit (not shown) and a CPU (7b).
This CRT transmits and receives signals to and from the RT-C (9).
-Outputs a display signal to C(9). (9) is CR
The T-C receives the display signal and transfers the map data, driving route information, character data, etc. to the CRT (
26) Horizontal synchronization signal (H3YNC) for display
and a vertical synchronization signal (VSYNC). (31) is the first frame memory, which has multiple memories in which various map information corresponds to the three primary colors (red, green, blue), and when the above map data is continuously output, the map becomes colored. It is now displayed in . (32) is the second
This frame memory stores current position data, travel trajectory data, etc. as the travel route information. (3
3) and (34) are parallel-to-serial converters, which respectively convert parallel signals from the first and second frame memories into serial data using a dot timing lock.

(36) is a color palette, the details of which will be explained based on FIG.

FIG. 12(a) shows the first color palette (36a) which is the first color code setting means, and FIG. 12(b) shows the second color palette (36b) which is the second color code setting means.
). Each of the above color palettes (36a), (36
b) includes an address section (A) for setting the first and second color codes corresponding to the palette numbers (0, 1...) in Table 1 above, and an address section (A) for setting the first and second color codes. It has an RGB code section (B) indicating a display color corresponding to the code. First, in the first color palette (36a), a first color code is stored in the address section (A) corresponding to palette number 0 indicating a main road (arterial road). 0OFH, which indicates red, is assigned as the corresponding RGB code. Further, a second color code is stored in the address field (A) corresponding to pallet number 1 indicating a detailed road (non-arterial road), and the RGB code corresponding to this second color code is FO indicating green.
FH is assigned. Below, RGB codes indicating various colors are assigned to each item, but palette number 15 indicating the background color of the screen (26a) corresponds to the background color code stored in the address section (A). , 888H indicating blue is assigned to the RGB code.

Next, in the second color palette (36b), RGB code 0OFH is assigned to the main road of palette number 0, and RGB code 888H is assigned to the background of palette number 15. The detailed road with palette number l is assigned an RGB code of 888H, and is displayed in the same color as the RGB code indicating the background color.

By the way, (26) shown in FIG. 1 is a display device,
Video signal (H3YNC) from the above CRT-C (9)
Map of a specific area by synchronization signal (VSYNC),
The driving route, current location, etc. are displayed in color.

In addition, various operation keys of the touch switch section (described later) are displayed in a predetermined touch area, and when the function switch (SW5) is pressed, the TV tuner (2
It is also possible to display TV images by turning on 2).

(27) and (29) are connected to the CPU via the output port (6).
(7) is a light emitting unit connected to the CRT (26), (28) and (30) are light receiving units connected to the CPU 7) via the input boat 5), and are arranged on the surface of the CRT (26); 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 (26a
), 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 start or stop the operation of each device, and set the time, numerical value, etc. It is possible.

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 you turn on the key switch when you start driving the car, the electrical system of each part becomes operational by receiving power from the car's on-board battery. And the CPU (7) of the control unit (1)
When the power is turned on, it is operated by a stabilized power source, initialization is performed in step Sit of the flowchart shown in FIG. 4, and the arithmetic processing shown in the main routine of the same figure is repeated at a cycle of about 10 m5ec. Next, function key processing is performed in step 312, followed by touch switch input processing 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 operation advances to the control knob S15, and the CRT (26) is pressed. A radio mode pattern as shown in FIG. 5 or an air conditioner mode pattern as shown in FIG. 6 is displayed on the screen (26a). Then, if you touch the switch turn area provided on the display screen of each mode,
The selected device can be operated according to desired settings. In addition, even during such operation, the steering wheel 31
Proceeding to step 6, the CPU (71) executes current position calculation processing and the like.

First, as shown in the flowchart of FIG. 8, when a pulse signal is output from the distance sensor (21), in step 321, 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.
) is given to Then, the CPU (71) 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. 10 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 mileage d, for example 39.25c+n, the mileage per fixed time is determined.

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

Subsequently, in step S44, 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 S45, 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 from moment to moment, can be 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 when the vehicle is stopped and the key switch is turned off, data such as the current position (x, y) and distance traveled can be retained.

Note that in step 346, the count of the number of pulses N is cleared. Then, proceeding to step S47,
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.

Thereafter, in step 348, both vehicle speeds V are determined from the travel distance and the timer interrupt time ΔT, for example 100 m5ec.

By the way, when starting the car, the user operates the navigation system (11) to set the starting 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 is 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 storing the map information, and as shown in FIG.
The desired map will be displayed on the screen (26a) of 6).

By the way, in the navigation, since the arithmetic processing shown in the flowchart of FIG. 8 is continued, in step S23, it is determined whether the vehicle is running or stopped. Here, if there is no change, the process returns and continues displaying the current position.

Next, the process proceeds to step S24, where it is determined whether the vehicle is running. When the vehicle is stopped, the vehicle speed sensor serving as the selection means does not output a detection signal of the vehicle speed V, so it is determined that there is no change in running, and the first color code setting means is selected.

Then, map data and diagram data are read from the first frame memory (31), and a map is drawn on the screen (26a). At this time, the RGB code is read from the first color palette (36a) shown in FIG.
Sent to RT (26). At this time, pallet number 15 (
The map background color code 888H is set in the screen background), and the main road color code 0OFH is set in the palette number 0 (main road).

Thereafter, the process proceeds to step S25, where the color code FOFH is set to the palette number l (detailed road). As a result, as shown in FIG. 13(a), the background color of the map is displayed in blue on the screen (21a), and the main roads (Ll)
is displayed in red, and the detailed road (L2) is displayed in green, each of which is displayed in a different color. As a result, the main road (Ll) and the detailed road (L2) can be viewed simultaneously on the map, making it possible to obtain necessary road information when starting the vehicle.

On the other hand, when the vehicle is running, it is determined in step S24 that the vehicle is running, and the second color code setting means is set. Then, the RGB code is read from the second color palette (36b) shown in FIG.
(26). At this time, no change occurs in the palette number 15, but the color code 888H of the detailed road (L2) is set in the palette number 1 (detailed road). Therefore, this detailed road (L2) is displayed in blue on the screen (26a), which is the same as the background color of the screen (26a). Then, the detailed road (L2) is erased from the map, as shown in FIG. 12(a). As a result, while the vehicle is running, the screen (26
Since only the main roads (Ll) are displayed in a), when it is necessary to view the map, only the simple main roads (Ll) can be visually recognized. Therefore, it is possible to check the roads on the map without being drawn to complicated diagrams.

As explained above, in this embodiment, when the map is displayed on the screen (26a), either the first color code setting means or the second color code setting means is set depending on whether the map is running or stopping. selected.

That is, while the vehicle is stopped, main roads (arterial roads) (Ll) are displayed in red on a map with a blue background color, and detailed roads (non-arterial roads) (L2) are displayed in green. On the other hand, when the vehicle is driven, detailed road (Ll)
) only changes to the same blue color as the background color, and this detailed road (
Ll) can be erased from the screen (26a). Therefore, when the vehicle is stopped, the details of the road map can be examined. On the other hand, when you want to look at the map while the vehicle is running, you can only check the main roads (Ll), eliminating confusion, and thus avoiding the problem of not paying attention to the road ahead while driving.

〔Effect of the invention〕

As explained above, in the present invention, when the moving object is a vehicle, if the first color code setting means is set to indicate that the vehicle is stopped, arterial roads and non-arterial roads on the road map are displayed as the background of the screen. Each color can be displayed in a different color. On the other hand, if the driving time is set in the second color code setting means, only non-arterial roads can be displayed in the same color as the background color of the screen. Therefore, when the vehicle is stopped, it becomes possible to visually check the details of the map and consider the driving route. On the other hand, while the vehicle is in motion, non-arterial roads are erased and only the main roads can be seen, so when the driver looks at the map on the screen as needed, he or she can avoid the confusion of complex line diagrams. This helps avoid problems such as being distracted and not paying attention to the road ahead, leading to safer 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. 5 to 7 are explanatory diagrams of various menus displayed on the display screen. FIG. 8 is a flowchart showing the calculation process for displaying the current position of navigation and map display. FIG. 9 is a flowchart showing the calculation process based on the distance pulse from the distance sensor, FIG. 10 is a flowchart showing the interrupt calculation routine based on the distance pulse from the distance sensor and the signal from the direction sensor, and FIG. 12(a) and (b) are detailed electrical block diagrams of the control unit in the figure, and FIG. 13(a) is a detailed illustration of the color palette.(b) is a detailed electrical block diagram of the control unit. map and line diagram screen [F
] is -. In the figure, (1) is the control unit, (7) is the CPU, (8)
(9) is CRT-C, (11) is navigation, (20) is RAM for display, (11) is navigation, (20)
) is a direction sensor, (21) is a distance sensor, (25a) is a map storage means (CD-ROM), and (26) is a display device (C
RT), (31), (32) are frame memories, (35
) is a multiplexer, (36) is a color palette, (L
l) is a trunk road (main road) (L2) is a non-arterial road (
Detailed road). In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] (1) Map information storage means for storing arterial road data and non-arterial road data that are coded arterial roads and non-arterial roads in the map, respectively; a display device having a screen for displaying a map; first and second color code storage means provided corresponding to the main roads, respectively, for storing color codes indicating the display colors of the respective roads; and reading out each road data from the map information storage means. , display control means for displaying each of the roads on the display device based on the color code stored in the corresponding color code storage means; first and second displays that are different from the background color of the screen and also different from each other; a first color code setting means for setting first and second color codes each representing a color in the first and second color code storage means; each color code storage means set by the first color code setting means; Select one of the second color code setting means for setting the same color code as the background color of the screen in the second color code storage means, and the first and second color code setting means. A navigation device for a moving body, comprising a selection means for causing the display control means to perform a display.