JP3201438B2 - Navigation vehicle position display method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for displaying the position of a vehicle in navigation.

[0002]

2. Description of the Related Art In a navigation apparatus, a configuration is employed in which a map is displayed on a screen and the position of a vehicle is displayed on the map. As a method of displaying the position of the own vehicle, the direction of the position of the own vehicle is always kept constant (usually upward), and the direction of the map is changed. There is a method to change.

[0003]

However, the conventional method of displaying the position of the own vehicle has a problem in that when the vehicle speed increases, the time in which the displayed map of the traveling direction can be used is short. For example, when the display of the position of the vehicle is fixed at the center of the screen, when the vehicle is traveling upward in the screen, the map from the center of the screen to the upper end of the screen is a usable map. now,
Using a 6 inch display, the screen height is 75mm
Assuming that the scale of the map is 1/8333, the actual display range is equivalent to 625 m. Therefore, the usable range is 312.5 m, which is half of that range. Now, the vehicle speed is 100km /
Considering H, since 312.5 ÷ (100 × 1000 ÷ 60 ÷ 60) = 11.25, only the range that passes in about 11 seconds can be displayed. Further, if the update period of the map display is 2 seconds, it becomes 11-2 = 9 seconds depending on the timing of viewing the map. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and to provide a method of displaying a position of an own vehicle, which extends the use time of a map during high-speed driving or the like without requiring a special operation.

[0004]

According to the first aspect of the present invention, there is provided a method for displaying a position of a vehicle on a map displayed on a screen. A speed detection step of detecting a speed, a speed determination step of comparing and determining the detected speed with a predetermined reference speed, and, after the determination, when the speed is equal to or higher than the reference speed, the position of the own vehicle is displayed at a lower part of the screen. And a control step of controlling the movement to be performed.
According to a fourth aspect of the present invention, there is provided a vehicle position display method for displaying a vehicle position on a map displayed on a screen, a speed detecting step of detecting a vehicle speed, and a direction of detecting a direction of the vehicle. A detecting step, a position display detecting step of detecting a display state of the own vehicle position after the detection of the direction, and a display state of the own vehicle position according to the detected vehicle speed in the detected direction. And a vehicle position display control step of performing control to move the vehicle display position.

[0005]

According to the first aspect of the present invention, the position of the own vehicle is moved to the lower part of the screen when the speed is equal to or higher than the reference speed according to the detected speed. Further, in the invention according to claim 4, the own vehicle display position in the display state of the own vehicle position is moved in the detected direction in accordance with the detected vehicle speed.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an outline of a navigation device mounted on a vehicle, and a display device 1 is installed near a driver's seat. The display device 1 is adapted to display a vehicle position display 2 together with a map display as shown in FIG. An orientation display 3 representing the orientation of the map is provided. The own vehicle position display 2 indicates a position when the speed of the vehicle is equal to or lower than the reference speed, and is displayed at a position slightly lower than an intermediate position in the vertical direction of the screen. When the vehicle speed becomes equal to or higher than the reference speed, the vehicle speed is displayed at the position of the own vehicle position display 2 'on the lower side of the screen. In this embodiment, the reference speed is 30 km / h and 50 km / h as shown in FIG. 4, and the hysteresis characteristic is maintained by using different standards in the case of speed-up and the case of speed-down. This can prevent the display position from frequently changing near the reference speed.

In FIG. 3, first, the average speed of the vehicle is calculated by an appropriate method (step 20). If the average speed is 50 km / h or more (step 21), it is determined whether or not the display of the own vehicle position is at the lower end (step 21). If not at the lower end, move to the lower end (step 23). 5 per hour in step 21
When the distance is 0 km or less, it is further determined whether or not the distance is 30 km or less (step 24). When the distance is 30 km or less, it is determined whether or not the vehicle position display is located at about 30% of the vertical length from the bottom of the screen (step 24). 25) If not, the vehicle position display is moved to the 30% position (step 26).

FIG. 5 shows a display method when the direction of the own vehicle position display is changed while the direction of the map is kept constant. According to the traveling direction of the vehicle, the vehicle position display is changed from the screen edge and the screen edge to a position about 30% of the screen length and width, respectively. That is, AA ', BB', C
The vehicle display position is changed between C ′, DD ′, EE ′, FF ′, GG ′, and HH ′.

This display method will be described in more detail with reference to FIG. Calculating the average speed of the vehicle (step 30);
If it is 50 km or more (step 31), it is determined whether or not the display of the own vehicle position is at the end of the screen (0% position) (step 32). If not, the own vehicle display position is designated as the end. (Step 33). If it is less than 50 km in step 31, it is further determined whether or not the vehicle is 30 km or less. If it is less than 30 km, it is determined whether or not the display of the vehicle position is about 30% of the length passing from the edge of the screen to the center of the screen ( Step 3
5) If not, the own vehicle position display is designated at a position of 30% (step 36). Then, it is determined whether or not the vehicle direction is north (step 37). If it is north, it is determined whether or not the display position of the own vehicle is currently designated to the end (step 38). The vehicle display is placed at the position A '(step 39). If not specified at the end, ie 30
When the position is designated as the% position, the display position of the own vehicle is set at A (step 40). If the vehicle direction is not north in step 37, it is determined whether the vehicle direction is northeast (step 41). If the vehicle direction is northeast, it is determined whether the own vehicle display position is designated as the current end (step 41). 42) If the end is designated, the own vehicle display is placed at the position B '(step 4).
3). If the vehicle position is not specified at the end (30%
When the position is designated), the display position of the own vehicle is set to B (step 44). The same operation will be followed for east, southeast, south, southwest, west,
The vehicle position is located at C, D, E, F, G, H or C ', D', E ', F', G ', H', respectively, which is repeated for the northwest.

FIGS. 7 and 8 show a display method in a case where the own vehicle is placed only at a position about 30% of the vertical and horizontal length of the screen from the edge of the screen based on the vehicle direction. Here, the direction of the vehicle is classified every 45 degrees. For example, assuming that the A position is 0 degree and the clockwise direction is the + direction, the own vehicle display is placed at the B position when the azimuth is 30 degrees. At this time, the direction is 20 degrees to 25
If it fluctuates every time, the display position changes frequently and the display becomes ugly, so that it has a hysteresis characteristic as shown in FIG.

The azimuth display method will be described in detail with reference to FIG. The azimuth is detected (step 50), and the average value is calculated by an appropriate method (step 51). If the previous position is A (step 52), θ <32
It is determined whether or not it is 0 degrees (step 53). If θ is less than 320 degrees, the display position is changed to position H (step 5).
4). If not less than 320 degrees, it is determined that 40 degrees <θ (step 55), and if θ exceeds 40 degrees, the display is changed to position B (step 56). If it does not exceed 40 degrees, this module is terminated. Next, if the previous position is B (step 57), it is determined whether or not θ <5 degrees (step 58). If less than 5 degrees, the display position is changed to position A (step 59). 85 if not less than 5 degrees
The degree <θ is determined (step 60), and if it exceeds 85 degrees, the display is changed to the position C (step 61). If not, the module is terminated. Next, if the previous position is C (step 62), it is determined whether θ <50 degrees (step 63), and if less than 50 degrees, the display position is changed to position B (step 64). If it is not less than 50 degrees, it is determined that 130 degrees <θ (step 65), and 130
If it exceeds the degree, the display is changed to the position D (step 6).
6). If not, the module is terminated. If the previous position is D (step 67), θ <95
The display position is changed to position C if it is less than 95 degrees (step 69). If not less than 95 degrees, 175 degrees <θ is determined (step 7).
0) If it exceeds 175 degrees, the display is changed to position E (step 71). If it does not exceed 175 degrees, this module ends. If the previous position is E (step 7
2) It is determined whether θ <140 degrees (step 73),
If it is less than 40 degrees, the display position is changed to position D (step 74). 220 degrees <θ if not less than 140 degrees
Is determined (step 75), and if it is less than 220 degrees, the display is changed to the position F (step 76). If it is not less than 220 degrees, the module ends. Last position is F
In this case (step 77), it is determined whether or not θ <185 degrees (step 78). If it is less than 185 degrees, the display position is changed to position E (step 79). If it is not less than 185 degrees, it is determined that 265 degrees <θ (step 80).
If it exceeds 5 degrees, the display is changed to position G (step 81). If not, the module is terminated. If the previous position is G (step 82), θ <2
It is determined whether the angle is 30 degrees (step 83). If the angle is less than 230 degrees, the display position is changed to position F (step 84).
If it is not less than 230 degrees, it is determined that 310 degrees <θ (step 85), and if it is more than 310 degrees, the display is changed to the position H (step 86). If it does not exceed 310 degrees, this module ends. If the previous position is H (step 87), it is determined whether θ <275 degrees (step 88), and if less than 275 degrees, the display position is changed to position G (step 89). If not less than 275 degrees, it is determined that 355 degrees <θ (step 90), and if it is more than 355 degrees, the display is changed to position A (step 56). 35
If not, terminate this module.

As described above, in the embodiment shown in FIGS. 2 and 3, when the vehicle speed is increased, the display of the position of the own vehicle is lowered to the lower end of the screen. I can do it. In the embodiments shown in FIGS. 5 and 6, when the vehicle speed is higher than the reference, the own vehicle position display moves to the end of the screen. Since the position of the vehicle is displayed near the club, it is possible to see many maps in the traveling direction. Further, in the embodiment shown in FIGS. 7 to 9, the own vehicle position is always displayed closer to the end than the center, so that it is possible to see many maps in the traveling direction. Note that FIG.
The flowcharts shown in FIGS. 6 and 9 are executed by, for example, a microcomputer at predetermined time intervals or in accordance with the traveling state (for example, traveling speed) of the vehicle.

[0013]

As described above, according to the present invention, there is provided a method for displaying the position of a vehicle on a map displayed on a screen, the method comprising the steps of: detecting a vehicle speed; Comparing the speed and the predetermined reference speed, a speed determination step to determine, after the determination,
When the speed is equal to or higher than the reference speed, a control step of controlling the vehicle position to move downward on the screen is provided.
It is possible to see a lot of map information in the vehicle traveling direction.
According to a fourth aspect of the present invention, there is provided a vehicle position display method for displaying a vehicle position on a map displayed on a screen, a speed detecting step of detecting a vehicle speed, and a direction of detecting a direction of the vehicle. A detecting step, a position display detecting step of detecting a display state of the own vehicle position after the detection of the direction, and a display state of the own vehicle position according to the detected vehicle speed in the detected direction. Since it has the own vehicle position display control step of performing control to move the own vehicle display position, it is possible to see a lot of map information in the vehicle traveling direction according to the display state of the own vehicle position and the vehicle speed.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a navigation device.

FIG. 2 is a state diagram of the display device 1 showing one embodiment of the present invention.

FIG. 3 is a flowchart showing one embodiment of the present invention.

FIG. 4 is an explanatory diagram of a hysteresis characteristic showing one embodiment of the present invention.

FIG. 5 is an explanatory view showing another embodiment of the present invention.

FIG. 6 is a flowchart showing another embodiment of the present invention.

FIG. 7 is an explanatory view showing still another embodiment of the present invention.

FIG. 8 is an explanatory diagram of a hysteresis characteristic showing still another embodiment of the present invention.

FIG. 9 is a flowchart showing still another embodiment of the present invention.

[Explanation of symbols]

 1: display device, 2: own vehicle position display, 3: azimuth display.

Continuation of the front page (56) References JP-A-4-115117 (JP, A) JP-A-3-126767 (JP, A) JP-A-4-233579 (JP, A) JP-A-4-353891 (JP , A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01C 21/00 G08G 1/0969 G09B 29/10

Claims (5)

(57) [Claims] 1. A method for displaying a position of an own vehicle on a map displayed on a screen, the method comprising the steps of: detecting a vehicle speed; and detecting the detected speed and a predetermined reference speed. A speed determination step for comparing and determining; and a control step for controlling, after the determination, when the speed is equal to or higher than the reference speed, the own vehicle position to be moved downward in the screen. Car position display method. 2. The method of claim 1, further comprising a speed average calculating step of calculating and calculating an average of the vehicle speed detected in the speed detecting step over a predetermined period. 3. A period detecting step for detecting that the predetermined period has been exceeded, a speed change detecting step for detecting the presence or absence of a speed change by the period detection, and a speed change by the speed change detection. 3. The navigation vehicle position display method according to claim 2, further comprising a control step of performing a control to display the position of the vehicle based on a hysteresis characteristic in a relationship between the vehicle speed and the display position of the vehicle position. 4. A vehicle position display method of navigation for displaying a vehicle position on a map displayed on a screen, a speed detecting step of detecting a vehicle speed, a direction detecting step of detecting a direction of the vehicle, After detecting the direction, the position display detecting step of detecting the display state of the vehicle position, and, in the detected direction, the vehicle display position of the display state of the vehicle position according to the detected vehicle speed. A vehicle position display control step of controlling the movement of the vehicle; 5. The self-vehicle position display control step moves the self-vehicle position display position from an end of the screen to a center of the screen according to the detected direction, and the detected vehicle speed is equal to or higher than a predetermined speed. 5. The method according to claim 4, wherein control is performed to move the vehicle to an end of the screen.