JPH07141598A - Device for displaying for vehicle - Google Patents

Abstract

PURPOSE:To provide a position displaying device for a vehicle whereby the progressing direction of the vehicle as against the destination direction is quickly and correctly grasped. CONSTITUTION:A mark indicating the present position of the vehicle as the present place mark 41 and a segment indicating the progressing direction are displayed on a display screen and also a diamond-shaped area 44 which progresses from the present place 41 to a destination place 42 is made to be clearly discriminated in a display state being different from that of the other area so that the progressing direction of the vehicle for the destination direction is easily and intuitively grasped and the direction to be progressed by the vehicle is quickly and correctly judged at an intersection, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle position display device which is mounted on a vehicle and displays the current position and destination of the vehicle on a map.

[0002]

2. Description of the Related Art In recent years, even when an occupant goes to an unfamiliar area, it is necessary to know the current position and traveling direction of the own vehicle so that the passenger does not get lost and to be able to reliably reach the destination. As a purpose, a vehicle position display device has been proposed which displays a map, current position, destination direction, and the like on a vehicle-mounted display device. As a conventional vehicle position display device, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 1-199114.
FIG. 15 is a diagram showing an example of a display screen of the above conventional example. In the above-described conventional vehicle position display device, as shown in FIG. 15, a map, a map,
The current position 41 of the vehicle, the traveling direction of the vehicle (black triangle mark), the destination 42, and the straight line 81 connecting the destination and the current position are also displayed. The above device has the advantage that the relationship between the current position of the vehicle and the destination can be read relatively easily.

[0003]

However, in such a conventional vehicle position display device, the traveling direction of the vehicle is indicated by an azimuth mark (black triangle mark) indicating the direction of the vehicle as shown in FIG. It is only displayed very close to the mark indicating the current position. Therefore, when comparing the current vehicle traveling direction and the destination direction indicated by the straight line 81, it is necessary to compare the directions of different types of the straight line 81 and the azimuth mark of the black triangle mark. It was difficult to judge the difference. That is, in the above conventional example, the visibility and legibility of the traveling direction of the vehicle with respect to the destination direction are not sufficient, and there is a possibility that the direction of the vehicle at the intersection or the like cannot be promptly and accurately determined.
There was a problem. The present invention has been made in order to solve the problems of the prior art as described above, and provides a vehicle position display device capable of promptly and accurately grasping a traveling direction of a vehicle with respect to a destination direction. The purpose is to

[0004]

To achieve the above object, the present invention is constructed as set forth in the claims. FIG. 1 is a functional block diagram of the present invention. In FIG. 1, the position detecting means 1 detects the current traveling position and traveling direction of the vehicle. Also, the map display control means 2
Controls the map display around the current position of the vehicle based on the detection result of the position detecting means 1 and the data of the map database included therein. Further, the position / direction display control means 3 is
Based on the detection result of the position detection means 1, the display of the mark indicating the current position of the vehicle and the line segment indicating the traveling direction of the vehicle on the map display is controlled. Also, the destination setting means 4
Sets the destination or transit point of the vehicle. Further, the map display state control means 5 controls the state of the map display based on the current position detected by the position detection means 1 and the destination or waypoint set by the destination setting means 4. The display means 6 also performs display based on the control of the map display control means 2, the position / direction display control means 3 and the map display state control means 5. The position / direction display control means 3 has a mark indicating the current position of the vehicle as a mark indicating the current position of the vehicle and a line segment indicating the traveling direction of the vehicle, as well as a mark indicating the current position of the vehicle. A line segment (for example, a solid line or a broken line) that is continuous in the direction is displayed. Further, the map display state control means 5, for example, as described in claim 3, a map display of a certain area (for example, a rhombic area in FIG. 7) between the current position of the vehicle and the destination or waypoint, and A means for controlling so as to have a difference in display state between a map display of an area excluding a certain area, or a line segment connecting a current position of a vehicle and a destination or waypoint (as described in claim 4). For example, it is a means for displaying the line segment 81) in FIG.
Further, in the invention according to claim 5, the lower end is supported, the upper end is formed so as to be movable on the hemispherical surface, and the supporting portion of the lower end is formed so as to be vertically movable (FIG. 1). (Not described in the above), and the map display state control means 5
Is configured to control the moving direction and moving speed of the display screen based on the amount of movement of the operating means on the hemisphere, and to control the scale of the display screen based on the amount of vertical movement of the operating means. is doing. The position detecting means 1
2 corresponds to, for example, the distance sensor 24 and the direction sensor 25 in the embodiment of FIG. 2 described later, the map database also corresponds to the external memory 23, the destination setting means 4 also corresponds to the operation board 22, and the display means 6 Similarly, it corresponds to the CRT display device 21. The map display control means 2, the position / direction display control means 3 and the map display state control means 5 also correspond to the microcomputer 26. The operating means of claim 5 corresponds to, for example, the joystick 17 shown in FIG.

[0005]

As described above, in the present invention, the mark indicating the current position of the vehicle and the line segment indicating the traveling direction of the vehicle are displayed, and the map display state in the destination direction is a map display other than the destination direction. It is clearly distinguished from the state (claim 3), or a straight line from the current position toward the destination is displayed (claim 4). Therefore, it is possible to intuitively and easily grasp the traveling direction of the vehicle with respect to the destination direction, and it is possible to quickly and accurately determine the traveling direction of the vehicle at an intersection or the like. Further, in the configuration according to claim 3, since the area in which the map display state indicating the direction of the destination is distinguished has a certain width, the occupant will be able to determine the range of the route if he or she takes the route. It is possible to easily determine whether to reach the ground. Further, the configuration according to claim 4 has an advantage that the calculation load on the CPU can be kept low. The display screen having the structure of claim 3 is as shown in FIG. 7, for example. In FIG. 7, reference numeral 41 is a mark indicating the current position of the vehicle and a line segment indicating the traveling direction of the vehicle, 42 is a mark indicating the destination, and a white portion 44 is an area distinguished from the others by changing the display state of the map. is there. The display screen having the configuration of claim 4 is as shown in FIG. 13, for example. In FIG. 13, 41 is a mark indicating the current position of the vehicle and a line segment indicating the traveling direction of the vehicle, 42 is a mark indicating the destination, and 81 is a straight line extending from the current position toward the destination. Further, in the configuration of claim 5, the scale can be changed and the map can be scrolled by one operation means that can move vertically and vertically on the hemisphere, and the operator can select an arbitrary area of the displayed map. The scale can be changed to improve the operability.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 2 is a block diagram showing the circuit configuration of the first embodiment of the present invention. In FIG. 2, reference numeral 24 is a distance sensor, which generates a signal each time the vehicle travels a unit distance (L). Reference numeral 25 denotes an azimuth sensor, which detects, for example, geomagnetism to detect the traveling azimuth of the vehicle. Two
An external memory 3 stores map data in a certain range, and when a request signal from the microcomputer 26 is received, map data of a specific area is stored in the microcomputer 26.
To send to. The microcomputer 26 performs arithmetic processing according to a procedure programmed in advance, and includes a CPU 27, a ROM 28, a RAM 29, and a V-RAM.
30 and an I / F circuit 31. And distance sensor 2
4, the current position and the like on the map are calculated from the signals from the azimuth sensor 25 and the external memory 23, and an image signal for displaying these information is generated. Further, reference numeral 22 denotes an operation board, which is operated by a driver or other occupant to operate the CRT.
It is possible to select the map displayed on the display device 21, select the scale of the displayed map, correct the current position of the vehicle on the map display, input the destination, and the like. Further, the CRT display device 21 displays a map of a specific area, the current position of the vehicle, the position of the destination, etc. by the image signal from the microcomputer 26.

Next, FIGS. 3 and 4 are processing flow charts of the CPU 27 showing the operation of this embodiment. First,
The flow shown in FIG. 3A will be described. When the system starts up, the CPU 27 causes the microcomputer 2
A series of initialization processing such as initial setting of the input / output conditions of 6 is performed (step 110). Next, the operation performed by the occupant through the operation board 22 and the direction sensor 25
The initial position of the vehicle is set based on the signal (step 120). This is, for example, when the occupant selects the map displayed on the CRT display device 21 to be a map showing the vicinity of the current position, and further specifies the current position on the map with a cursor or the like so that the coordinates (Xc , Yc)
Is calculated, and the traveling direction (θ) is further calculated from the signal of the direction sensor 25. Following that, the current position mark (for example, 41 in FIG. 5) is displayed on the map screen on the CRT display device 21 (step 130). Here, the above-mentioned current position mark will be described. The current position mark is
As shown in FIG. 6A, a mark 51 indicating the current position of the vehicle and a line segment 53 continuous from the mark 51 toward the traveling direction are formed. Mark 5 corresponds to the more accurate current position
1 is the point indicated by the tip 52. When displaying the present position mark on the CRT display device 21, the mark 51 and the line segment 53 are aligned in the advance direction (θ) obtained in advance, and the tip portion 52 is set at the present position coordinate (Xc, Yc). To be displayed together. In addition, in FIG. 6A, a mark composed of a broken line and a triangle mark is shown as the current position mark, but as shown in FIGS. 6B to 6D, a solid line and a triangle mark, a broken line and a cross mark, Combinations such as solid lines and crosses are also possible. That is, the present position mark in the present invention may be any combination of the mark indicating the coordinates of the present position and the line segment indicating the traveling direction, and is not limited to the above example. Next, returning to the description using the processing flowchart of FIG. When the previous current position mark display processing is completed, the CPU 27 permits acceptance of interrupt processing (step 140), and while performing a background job such as monitoring of CPU 27 runaway by the watchdog timer, the purpose shown in FIG. A standby state stands by for the occurrence of the ground input interrupt process and the current position calculation interrupt process shown in FIG. 4C (step 150).

Next, the destination input interrupt process shown in FIG. 3B is an interrupt process that occurs when an occupant inputs a destination (or waypoint, the same applies hereinafter) via the operation board 22. In this interrupt processing, first, during the processing, acceptance of the interrupt processing is prohibited so that another new interrupt processing does not come in (step 210). Next, the destination is input based on the operation performed by the passenger through the operation board 22 (step 220). This is for example CR
The occupant selects the map displayed on the T display device 21 to be a map showing the vicinity of the destination, and further designates the destination on the map with a cursor or the like to determine the coordinates (Xd, Yd) of the destination. Is a process for obtaining. Subsequently, the destination mark (eg 42 in FIG. 7) is displayed on the map screen on the CRT display device 21 (step 230). Here, if the destination has already been input, the previous destination mark is erased and the destination mark is displayed at the new position. Next, at step 240, the subroutine shown in FIG. 4D, that is, the display state changing subroutine for changing the map display state between the current position and the destination is executed.

The subroutine shown in FIG. 4D will be described below. In this display state changing subroutine, first, the distance from the current position to the destination is calculated by trigonometry or the like from the previously calculated current position coordinates (Xc, Yc) and the destination coordinates (Xd, Yd) (step 410).
Then, as shown at 43 in FIG. 7, for example, the calculated distance value to the destination is displayed on the map screen on the CRT display device 21 (step 420). Here, if the distance display between the destinations has already been performed, the previous distance display is erased and a new distance value is displayed. Next, in order to make the map display state of a certain area between the current position and the destination different from other areas, the area is calculated (step 430). The display of this area is
For example, as indicated by 44 in FIG. 7, the display is made in a rhombus whose display density is lighter than that of other areas. For the calculation, as shown in FIG. 8, for example, a rhombus in which the current position 41 and the destination 42 are diagonal lines on the longer side of the rhombus is considered, and the coordinates of the other two corners 63 and 64 of the rhombus are obtained. Calculate by Here, it is assumed that the smaller interior angle of the diamond is α. First, the midpoint 65 between the current position 41 and the destination 42
Then, the line segment perpendicular to the straight line connecting the current position 41 and the destination 42 is equally extended on both sides from the midpoint 65. And each length h from the midpoint 65 of the perpendicular
And the length g between the current position 41 and the midpoint 65 is tan (α / 2) = h / g, that is, both ends of the perpendicular, that is, the other two corners 63 and corners of the diamond. Find the 64 coordinates. This current position 41,
The diamond 42 consisting of the destination 42 and the two corners 63, 64
It becomes a fixed area 44 between the current position and the destination. Subsequently, the display state of the brightness, vividness, hue, etc. of the map is changed so that the map display state of this certain area has a difference from other areas (step 440). Here, if the map display state has been changed in advance, the map display state changed for the new area is restored after the previous changed map display state is restored. Further, as shown in FIG. 9, the destination 42 is displayed on the display screen 71 of the CRT display device 21.
If it is out of the range, the constant area 44 between the current position and the destination is calculated in the coordinate system including the outside of the display screen. Only the part included in is changed so that the display state is different from other areas. Here, a supplementary description will be made on how to obtain the area of the constant area 44 between the current position and the destination. As shown in FIG. 10A, the constant area 44 may be set in a diamond shape, or may be set in an elliptical shape, a triangle shape, or the like as shown in FIGS. 10B to 10D. The invention is not limited to these as long as it complies with the spirit of the invention. Next, after changing the map display state between the current position and the destination, the display state change subroutine is ended by the return of step 450. Next, FIG. 3 (b)
Returning to the processing flow chart of No. 2, acceptance of interrupt processing is permitted (step 250), and the destination input interrupt processing is ended (step 260). Then, the process returns to the background job (step 150) in FIG. 3A, and enters the standby state for the next interrupt processing.

Next, the current position calculation interrupt process shown in FIG. 4 (c) is an interrupt process based on a signal from the distance sensor 24 generated every time the vehicle travels a unit distance (L). In this interrupt processing, first, during the processing, acceptance of the interrupt processing is prohibited so that another new interrupt processing does not come in (step 310). Then, a new current position and a new heading are calculated (step 320). This process is a process of reading the traveling azimuth (θ) from the signal of the azimuth sensor 25 and calculating the coordinates (Xc, Yc) of the current position by the following equation. Xc ← Xc + Lcosθ Yc ← Yc + Lsinθ In the above equation, L is the unit distance described above. Subsequently, it is judged whether or not the current position or the traveling direction has moved by the above-mentioned processing (step 330), and if it has not moved, acceptance of interrupt processing is permitted (step 370), and the current position calculation interrupt occurs. The process ends (step 380). Then, the process returns to the background job (step 150) in FIG. 3A, and enters the standby state for the next interrupt processing. If it is moving in step 330, the old current position mark already displayed on the map screen on the CRT display device 21 is erased, and the coordinates (Xc, Yc) and the traveling direction of the previously obtained current position are deleted. A new current position mark 41 is displayed based on (θ) (step 3
40). Next, it is judged whether or not the destination is input in advance (step 350), and if it is not input, acceptance of interrupt processing is permitted (step 37).
0), the current position calculation interrupt process ends (step 3).
80). Subsequently, the process returns to the background job (step 150) in FIG. 3A, and enters the standby state for the next interrupt processing. When the destination is input in step 350, the display state changing subroutine for changing the map display state between the current position and the destination shown in FIG. 4D is executed (step 360). This subroutine has already been described in the above-mentioned destination input interrupt processing, and will be omitted. After the display state changing subroutine is completed, acceptance of interrupt processing is permitted (step 370) and the current position calculation interrupt processing is completed (step 380). Then, the background job of FIG.
It returns to 0) and becomes a standby state for the occurrence of the next interrupt processing.

The display screen of the result of performing each processing as described above is shown in FIG. 7, for example. In FIG. 7, the current position mark 41 is composed of a triangular mark indicating the position and a line segment (broken line) indicating the traveling direction, and a rhombic region 44 connecting the current position and the destination is displayed in white. , Clearly separated from other areas. Also, the distance 43 between the current position and the destination is indicated by a number. As described above, according to the present embodiment, a mark indicating the position and a line segment indicating the traveling direction of the vehicle are displayed as the current position mark, and the map display state in the destination direction is a map other than the destination direction. It is clearly distinguished from the display state. Therefore, it is possible to instantly and easily grasp the traveling direction of the vehicle with respect to the destination direction, and it is possible to promptly and accurately determine the traveling direction of the vehicle at an intersection or the like. In addition, since the area where the map display state indicating the direction of the destination is distinguished has a certain width, the occupant can roughly determine the range of the route to reach the destination. Can be easy.

Next, FIGS. 11 and 12 show a second embodiment of the present invention.
3 is a processing flowchart showing an embodiment of FIG. The block of the circuit configuration is the same as that in FIG. Most of the present embodiment is similar to the first embodiment, so only different parts will be described. In the first embodiment, as shown in FIG.
In the current position / destination area calculation (step 430) and the current position / destination display status change (step 440) in the display state changing subroutine shown in (d), a constant area between the current position and the destination is displayed. The map display state of
It is configured to have a difference from other areas. On the other hand, in the present embodiment, in the current position / destination straight line display (step 510) in the display state changing subroutine shown in FIG. 12D, a straight line connecting the current position and the destination is displayed. It is configured to do. This point is the only difference from the first embodiment, and the other points are the same as in the first embodiment.

Then, step 5 shown in FIG.
10 will be described. In step 510, a straight line 81 (such as a solid line or a broken line) that connects the coordinates (Xc, Yc) of the current position and the coordinates (Xd, Yd) of the destination that are obtained in advance is displayed on the display screen 71 of the CRT display device 21. . Here, if the straight line 81 has been displayed before that, the previous straight line 81 is erased and the new straight line 81 is displayed. Further, as shown in FIG.
When is not on the display screen 71 of the CRT display device 21, only the part of the line 81 connecting the current position and the destination is included in the display screen 71 is displayed. After that, the display state changing subroutine is ended by the return shown in step 450 of FIG. 12D, as in the first embodiment.

The display result of this embodiment is, for example, as shown in FIG. In FIG. 13, the current position mark 41
7 is composed of a triangular mark indicating the position and a line segment (broken line) indicating the traveling direction, as in FIG. Then, a straight line 81 connecting the current position and the destination is displayed. As described above, according to the present embodiment, the line segment indicating the traveling direction of the vehicle is displayed on the map display, and the straight line extending from the current position toward the destination is displayed. Therefore, since the traveling direction of the vehicle and the destination direction can be determined by comparing the line segments with each other, the traveling direction of the vehicle with respect to the destination direction can be instantly and easily grasped, and the intersection of the vehicle It is possible to promptly and accurately judge the direction to go. Further, in this embodiment, the CP is more than in the first embodiment.
There is an advantage that the calculation load of U27 can be kept low.

Next, a map display device for displaying a map on a display screen such as a CRT display device will be described. As a conventional map display device, the vehicle position is specified by signals from various sensors, the map data stored in the storage device is read from the signals, and the map data is stored in a display device in the vehicle such as a CRT display device or a liquid crystal monitor. There is a vehicle equipped with a function of displaying a current position of a vehicle and a map around it and enlarging, reducing, scrolling, etc. of the displayed map by an operation of an occupant. However, a conventional device, for example, JP-A-61-1562.
In the device described in Japanese Patent Publication No. 77, a plurality of switches are used when changing the scale of a map or scrolling a map, so the operation is complicated and the position of the switch must be confirmed every time it is operated. In addition, there was a problem that it was only possible to change the scale around the vehicle position. In the present invention, in order to solve the above-mentioned problems of the prior art, the scale can be changed and the map can be scrolled by a small number of switches, and the operator can select an arbitrary area of the displayed map to reduce the scale. A map display device that can be changed is provided. Furthermore, in the present invention, when the map is viewed from directly above, a narrow range can be seen in detail when the viewpoint approaches, and a wide range can be seen when the viewpoint moves away. When you change the scale by pressing the joystick, the map expands and only a part of it looks larger, and when you pull it, the map shrinks and you can see a wide range. It is configured to be provided according to the sensitivity of.

Hereinafter, description will be given based on an embodiment. FIG.
FIG. 1 is a block diagram showing a circuit configuration of an embodiment of a map display device of the present invention. This map display device is installed in a vehicle, for example, and guides the travel of the vehicle, and has a map on the travel route of the vehicle and a CRT display 11 for displaying the current position of the vehicle on the map. The CRT display 11 is connected to the microcomputer 16. The microcomputer 16 includes a CPU 16a, R
OM16b, RAM16c, V-RAM16d and I
The CRT display 11 is connected via the I / F circuit 16E. In addition to the CRT display 11, a keyboard 12, an external memory 13, a distance sensor 14, and a direction sensor 15 are connected to the I / F circuit 16e of the microcomputer 16. The keyboard 12 is for inputting various information to the microcomputer 16 by the operation of an operator such as a driver. Further, the keyboard 12 moves the cursor displayed on the map or scrolls the map to display the current position or destination of the vehicle on the map displayed on the CRT display 11. You can change the scale. And its structure is
As shown in FIG. 17, the lower end is supported, the upper end moves on the hemispherical surface, and the lower support part moves up and down, and the mode changeover switch SW1 for entering the scale changing mode. have. The external memory 13 stores map data of a certain range necessary for vehicle travel guidance, supplies map data of a specific area instructed by the microcomputer 16 to the microcomputer 16, and controls the microcomputer 16. Originally, the map can be displayed on the CRT display 11. The distance sensor 14 detects the traveling distance of the vehicle, and generates a pulse each time the vehicle travels a unit distance. The azimuth sensor 15 detects the geomagnetism to detect the traveling direction of the vehicle, and digitally converts the detected signal azimuth and outputs it. In response to an instruction from the keyboard 12, the microcomputer 16 reads a map of the area where the vehicle is going to travel from the external memory 13 and displays it on the CRT display 11, and
The traveling start position of the vehicle is displayed on the map presented on the CRT display 11 by the instruction of the joystick 17 of the keyboard 12, and the traveling distance and the traveling direction of the vehicle when the vehicle travels from this traveling start position are measured by the distance sensor 14 and Sequentially detected by the direction sensor 15,
The current position of the detected vehicle is displayed on the CRT display 11
It is designed to be displayed on the map displayed in. In such an operation, the map display device of the present embodiment can change the scale of an arbitrary range on the map with one switch when changing the scale of the map display or scrolling.

Next, the operation will be described. 18 to 20 show
9 is a flowchart of an area selection map scale changing operation executed by the microcomputer 16. First, in step 101 of FIG. 18, by turning on the switch SW1 of FIG. 17, the scale of the map can be changed. Next, in step 102, when it is determined that the switch SW1 is in the ON state, an area selection line for selecting a map area is displayed on the CRT screen along the outer periphery of the display screen (step 103). .
Next, at step 104, the operating state of the joystick 17 shown in FIG. 17 is determined. 17B shows an example in which the switch SW1 is provided separately from the joystick 17, but the switch SW1 may be provided integrally with the joystick 17 as shown in FIG. 17C. Step 1
When the joystick is pressed in 04 (push 2)
For that, go to step 105 of FIG. 19 (continue from FIG. 18 to FIG. 19). In step 105, it is determined whether or not the area line display is a certain size or more (1 / x or more of the entire screen) with respect to the size of the map display screen. If NO in step 105, step 10
After displaying a map in which the magnification of the displayed map is m times in 6 and 107, the process returns to step 103 in FIG. 18 (from FIG. 19 to FIG. 18) and the area line is displayed on the screen. If YES in step 105, in step 108, the display area of the area line is reduced by n1 in the x-axis direction and n2 in the y-axis direction. Next, it is determined whether or not the coordinates on the hemispherical surface of the joystick have been changed while the joystick 17 is being pressed (step 109). If it is determined that the joystick has been operated, the joystick is determined in step 110. Control of the operation of (the control contents are the range of to in FIG.
Details will be described later), and then the process returns to step 103 (from FIG. 19 to via FIG. 18) to display the area line on the screen. If NO in step 109, the process immediately returns to step 103 to display the area line. If the joystick is kept pressed, the path from step 104 to → is repeated, so that the screen is successively reduced.

Next, when the joystick is pulled in step 104 of FIG. 18 (pull 1), it is determined whether the area line display is narrower than the size of the map display screen (step 112). . N at step 112
When it is determined to be O, the map displayed in steps 113 and 114 with the magnification of 1 / m is displayed, and then the process returns to step 103 to display the area line on the screen. If YES in step 112, step 11
5, the display area of the area line is n1 minutes in the x-axis direction, y
It is enlarged by n2 in the axial direction. If the joystick is continuously pulled, the route of step 115 is repeated, so that the screen is sequentially enlarged.
Next, in step 116, it is determined whether or not the coordinates on the hemisphere have been changed by the joystick while the joystick is being pulled. If it is determined that the joystick has been operated, in step 117,
The operation of the joystick is controlled (the control content is in the range from to in FIG. 20, details will be described later), and then the process returns to step 103 to display the area line on the screen. If NO in step 116, the process immediately returns to step 103 to display the area line.

Next, when it is determined in step 104 that the joystick is in the neutral position where it is not pushed or pulled (nutral 3), in step 119 it is determined whether the coordinates on the hemisphere have been changed. To judge. If YES, then step 120
Then, control the operation of the joystick.
To the range (to be described later in detail), and then the process returns to step 119. If NO in step 119, the process returns to step 102, and the switch SW1 is ON or OFF.
To judge. If it is ON, the operations from step 103 to step 120 described above are repeated, and if it is OFF, the map of the area line area is displayed in full screen in step 121.

Next, the control of the operation of the joystick described in steps 110, 117 and 120 will be described. FIG. 21 is a diagram showing an example of how to take the coordinates of the area line. As shown, the area line areas in the display screen are (X, Y), (X + L1, Y), (X, Y +).
L2) and (X + L1, Y + L2) are shown by a rectangular area delimited by four points. FIG. 20 is a flowchart showing the operation control of the joystick, and steps 110, 117 and 120 of FIGS.
Continued from FIG. In FIG. 20, first, in step 201, the horizontal tilt angle θjx and the front-back tilt angle θjx of the joystick are detected (θ
For jx and θjy, see FIG. 17 (b)). The amount of tilt angle corresponds to the movement amount of the area line and the scroll amount of the map scroll. When the inclination is large, the movement amount of the area line and the map scroll amount are increased, and when the inclination is small, the movement amount of the area line and the scroll amount. To reduce. Next, in step 202, the area line is moved according to the detected tilt angle. Next, in step 203, it is determined whether or not the area line exceeds the area of the display screen. If YES, steps 204 and 2
At 05 and 206, the map data is read from the storage device, the map of the adjacent area is displayed, and the map is scrolled. In the case of NO, it is determined in step 207 whether or not the joystick is turned ON. In the case of YES, the process returns to step 201 to repeat the above operation, and in the case of NO, the process described in FIGS. Return to General Flow. FIG. 22 is a conceptual diagram showing a map scale change state in the above control. FIG. 22 shows a state in which an arbitrary area line area is enlarged and displayed.

FIG. 23 is a system block diagram showing the above control function. In FIG. 23, as shown in FIG. 17, the joystick 17 has one lower end supported, the upper end moving on a hemispherical surface, and the lower supporting portion being vertically movable. Then, it outputs a signal corresponding to the amount of movement on the hemispherical surface and a signal indicating a vertically pushed state, a pulled state, and a neutral state. Also, the map data storage means 18
Corresponds to, for example, the external memory 13 shown in FIG. 16 and supplies the map data of the specified specific area to the map area and scale selecting means 19. The map area and scale selection means 19 selects an arbitrary area on the map based on the amount of movement of the joystick 17 on the hemisphere, and the scale of the displayed map based on the vertical movement state of the joystick 17. Select. This map area and scale selection means 19 corresponds to, for example, the microcomputer 16 in FIG. 16, and its function is shown in FIGS.
This corresponds to the contents described in the flowchart of. The map display means 20 corresponds to, for example, the CRT display 11 shown in FIG. 16, and displays the map provided from the map area and scale selection means 19.

Next, FIGS. 24 and 25 are views of other embodiments of the joystick. First, in the joystick shown in FIG. 24, of the actions in the z-axis direction, the pushing action is left unchanged, and instead of pulling the entire joystick 17, the switch SW2 is pulled from the lower side in the arrow direction (the switch button is pushed down). It is configured to perform a motion. In addition, the joystick shown in FIG. 25 pushes the switch SW3 from above (corresponding to pushing the joystick) and pulls the switch SW4 upward instead of pushing and pulling which are z-axis movements. The action (corresponding to the action of pulling the joystick) is performed. As described above, in the embodiment shown in FIGS. 24 and 25, the number of switches is larger than that in the embodiment of FIG. 17, but the switches are provided on the joystick and the operation direction thereof is increased. Is the same as the up / down operation direction of the joystick. In this way, the joystick structure can be simplified by substituting the switch for operating the joystick in the up-down direction (z-axis direction) in the same direction as the joystick operation, and the joystick can be operated easily. It is possible not to make much difference from the case of only. As described above, the scale can be changed and the map can be scrolled with a small number of switches using the joystick, and the operator can select an arbitrary area of the displayed map to change the scale. Also, when looking at the map from directly above,
Based on the fact that a narrow area can be seen in detail when the viewpoint approaches, and a wide area can be seen when the viewpoint moves away, the map can be enlarged by pressing the stick when selecting the display area and changing the scale in order to match human sensitivity. It is said that by configuring so that only a part of it looks large, and when you pull it, you can reduce it to see a wide range, so that the scale of the map that the operator wants can be provided according to the sensitivity of the operator, so that operability is improved. effective.

[0023]

As described above, according to the present invention,
A mark indicating the current position of the vehicle and a line segment indicating the traveling direction of the vehicle are displayed, and the map display state in the destination direction is clearly distinguished from the map display states other than the destination direction (claim 3).
A straight line from the current position toward the destination is displayed (claim 4). Therefore, it is possible to intuitively and easily grasp the traveling direction of the vehicle with respect to the destination direction, and it is possible to quickly and accurately determine the traveling direction of the vehicle at an intersection or the like. Further, in the configuration according to claim 3,
Since the area in which the map display state indicating the direction of the destination is distinguished has a certain width, the occupant can easily determine the route of the route to reach the destination. You can Further, in the configuration according to the fourth aspect, it is possible to obtain an effect such that the calculation load on the CPU can be kept low. Further, in the configuration according to claim 5, the scale can be changed and the map can be scrolled by one operation means that can move vertically and vertically on the hemisphere, and the operator can select an arbitrary area of the displayed map. Can be selected and the scale can be changed, so that the operability is improved.

[Brief description of drawings]

FIG. 1 is a diagram corresponding to a claim of the present invention.

FIG. 2 is a block diagram showing a configuration of a first exemplary embodiment of the present invention.

FIG. 3 is a part of a processing flowchart of the first embodiment of the present invention.

FIG. 4 is another part of the processing flowchart of the first embodiment of the present invention.

FIG. 5 is a diagram showing an example of a display screen in the first embodiment of the present invention.

FIG. 6 is a diagram showing an example of a mark indicating a current position and a line segment indicating a traveling direction in the first embodiment of the present invention.

FIG. 7 is a diagram showing another example of the display screen according to the first embodiment of the present invention.

FIG. 8 is a diagram showing a shape of a region in which a display state is changed in the first embodiment of the present invention.

FIG. 9 is a diagram showing another example of the display screen according to the first embodiment of the present invention.

FIG. 10 is a diagram showing another shape of a region for changing the display state according to the first embodiment of the present invention.

FIG. 11 is a part of a processing flowchart of the second embodiment of the present invention.

FIG. 12 is another part of the processing flowchart according to the second embodiment of the present invention.

FIG. 13 is a diagram showing an example of a display screen in the second embodiment of the present invention.

FIG. 14 is a diagram showing another example of the display screen according to the second embodiment of the present invention.

FIG. 15 is a diagram showing an example of a display screen in a conventional example.

FIG. 16 is a block diagram showing the configuration of a map display device.

FIG. 17 is a perspective view showing a first embodiment of a joystick.

FIG. 18 is a part of a processing flowchart of the first embodiment of the map display device.

FIG. 19 is another part of the processing flowchart of the first embodiment of the map display device.

FIG. 20 is another part of the processing flowchart of the first embodiment of the map display device.

FIG. 21 is a diagram showing coordinate display of area lines.

FIG. 22 is a conceptual diagram showing a state where the map scale is changed.

FIG. 23 is a system block diagram of a map display device.

FIG. 24 is a side view showing a second embodiment of the joystick.

FIG. 25 is a side view showing a third embodiment of the joystick.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Position detecting means 4 ... Destination setting means 2 ... Map display control means 5 ... Map display state control means 3 ... Position direction display control means 6 ... Display means 21 ... CRT 27 ... CPU 22 ... Operation board 28 ... ROM 23 ... External memory 29 ... RAM 24 ... Distance sensor 30 ... V-RAM 25 ... Direction sensor 31 ... I / F circuit 26 ... Microcomputer 41 ... Mark indicating current position and line segment indicating traveling direction 42 ... Mark indicating destination 43 ... Display of distance value from current position to destination 44 ... Constant area where display state between current position and destination is changed 51 ... Mark indicating current position 52 ... Point indicating exact position of current position 53 ... Progress of vehicle Line segments 63, 64 indicating the direction ... Two corners of a diamond that is a fixed area between the current position and the destination 65 ... Midpoint of the current position and the destination 71 ... Display screen 81 ... Present A straight line connecting the position and the destination

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication location G09B 29/10 A (72) Inventor Yagi Yoshiyoshi 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. Incorporated (72) Inventor Kiyomichi Yamada 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd.

Claims (5)

[Claims] 1. A map around a current position of a vehicle based on position detection means for detecting a current traveling position and a traveling direction of the vehicle, and a detection result of the position detection means and data of a map database included therein. A map display control means for controlling the display, and a position direction for controlling the display of a mark indicating the current position of the vehicle and a line segment indicating the traveling direction of the vehicle on the map display based on the detection result of the position detecting means. Based on the display control means, the destination setting means for inputting and setting the destination or waypoint of the vehicle, the current position detected by the position detecting means, and the destination or waypoint set by the destination setting means. The map display state control means for controlling the state of the map display, the map display control means, the position / direction display control means, and the map display state control means. The vehicle position display device characterized by comprising: a display means for performing display based on the control, the. 2. The position / direction display control means, as a mark indicating the current position of the vehicle and a line segment indicating the traveling direction of the vehicle, a mark indicating the current position and a line segment connecting from the mark in the traveling direction. The position display device for a vehicle according to claim 1, wherein the position display device displays. 3. The map display state control means determines a difference in display state between a map display of a certain area between the current position of the vehicle and the destination or waypoint and a map display of an area excluding the certain area. The position display device for a vehicle according to claim 1, wherein the position display device is a means for controlling so as to have. 4. The vehicle according to claim 1, wherein the map display state control means is for displaying a line segment connecting a current position of the vehicle and a destination or waypoint. Position display device. 5. A map display state control means comprising: operating means having a lower end supported, an upper end movably formed on a hemispherical surface, and a lower end support portion formed vertically movable. Controlling the moving direction and moving speed of the display screen based on the amount of movement of the operating means on the hemisphere, and controlling the scale of the display screen based on the amount of vertical movement of the operating means. The position display device for a vehicle according to claim 1, wherein: