JPH0732911A - End position display device for vehicle - Google Patents

Abstract

PURPOSE:To grasp the relative positional relation with an obstacle not visible easily, easily and accurately, by controlling the display of the image of an end mark display body depending on the distance of the end position and the obstacle detected by a distance detecting means. CONSTITUTION:A control circuit 7 controls a display unit 1 depending on the detecting signal from a corner sonar 6, the radiating light from the display unit 1 is reflected at a point D on a windshield 5 through a plane mirror 2 and a toroidal concave mirror 3, and it is injected to the eye position E of a driver. The corner sonar 6 is provided at the front end position of a vehicle lower than a front end display mark image 4, and when an obstacle is detected, the control circuit 7 takes in this output signal, controls a display control lights circuit 8, and flashes or lights the display unit 1. In this case, by changing the flashing cycle of the display unit 1 according to the distance between the top end position of the vehicle and the obstacle, the length of the distance with the obstacle can be recognized. In such a way, the positional relation with an obstacle can be grasped easily even though the obstacle is at a place lower than the bonnet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible for a driver to easily view the end position of a vehicle from the inside of the vehicle by forming an image of the end mark display near the end of the vehicle by an optical display means. The present invention relates to a vehicle end position display device.

[0002]

2. Description of the Related Art Conventionally, as a device of this type, a head-up display device for a vehicle, which allows a driver to visually recognize a front-end position of the vehicle, is disclosed in Japanese Patent Laid-Open No. 62-34824. It has been proposed by the publicity issue. This device forms an image of the tip mark display body installed in the vehicle in the vicinity of the tip position of the vehicle while reflecting the image on the windshield by the optical display means. By visually recognizing, the tip position of the vehicle, which is difficult to visually recognize, particularly the relative position to an obstacle such as a wall is visually recognized.

[0003]

However, in the above-mentioned prior art, for example, when the obstacle is lower than the bonnet or when the driver cannot see the obstacle because the surroundings are dark, the tip mark display Sometimes it is not possible to grasp the relative positional relationship between the image and the obstacle. Therefore, the present invention has been made in view of the above problems, and by displaying relative position information with respect to an obstacle that is difficult to visually recognize, the driver can easily determine the relative position between the vehicle and the obstacle. It is an object of the present invention to provide an end position display device for a vehicle capable of easily and accurately grasping a positional relationship.

[0004]

Therefore, the present invention provides an end position display device for a vehicle, which displays an image of the end mark display member by forming an image near the end position of the vehicle. And a distance detection unit that is provided at a position lower than the image formation position and that detects the distance between the end position and the obstacle that occurs with the movement of the vehicle, and the distance detected by the distance detection unit. And a control means for controlling the display of the image of the end mark display body based on the above.

[0005]

With the above structure, the distance detecting means detects the distance between the obstacle and the end of the vehicle which are difficult for the driver to visually recognize. In particular, since the distance detecting means is installed at a position lower than the end mark display body, it is possible to detect an obstacle at a low position which is difficult for the driver to visually recognize. Therefore, the control means changes the display of the image of the end mark display body according to the distance based on the detected distance.

That is, even if there is an obstacle that is difficult to visually recognize, the driver can recognize the relative positional relationship between the vehicle and the obstacle only by visually recognizing the display of the end mark display. can do.

[0007]

As described above, according to the present invention, by displaying the relative position information with respect to an obstacle which is difficult to visually recognize, the driver is allowed to perform a relative positional relationship between the vehicle and the obstacle. There is an excellent effect of providing an end position display device for a vehicle capable of easily and accurately grasping.

[0008]

The present invention will be described below based on the embodiments shown in the drawings. In this embodiment, a case where the present invention is applied to a vehicle end position display device will be described. FIG. 1 is a block diagram showing a vehicle end position display device of the present invention, and FIG. 2 is a block diagram showing a display 1.

In FIG. 1, the vehicle end position display device is
The control circuit 7 controls the display 1 based on the detection signal from the corner sonar 6, and the irradiation light emitted from the display 1 is
The device is configured to reflect the light at a point D on the windshield 5 via the plane mirror 2 and the toroidal concave mirror 3 and to make the light incident on the position E of the driver's eyes. As shown in FIG. 2, the display device 1 includes a display control circuit 8 for controlling the display configuration of the display device 1, a lamp 9 as a light source, and a light provided on the front surface of the lamp 9 for uniformizing the light. Diffusion plate 9a and liquid crystal display plate 10 for forming a tip display mark image and coloring
The lamp 9 is housed and the liquid crystal display panel 10 is provided on one side.
And a case 11 to which is attached.
The case 11 is made of metal or resin, and the inside of the case 11 is painted black to prevent stray light.

The plane mirror 2 is installed between the optical paths of the display 1 and the toroidal concave mirror 3, and the entire apparatus is miniaturized by folding the optical path. Further, the toroidal concave mirror 3 is a concave mirror having two orthogonal curvatures, and the optical path length from the display 1 to the toroidal concave mirror 3 and the windshield 5 at the reflection position D where the emitted light of the display 1 is reflected by the windshield 5. The curvature is determined by the radius of curvature and the distance between the display position of the tip display mark image 4 and the position E of the driver's eyes. The distance between the display device 1 and the toroidal concave mirror 3 is optically determined by the distance between the display position of the tip display mark image 4 and the position E of the driver's eyes.

Further, each of the optical elements of the plane mirror 2 and the toroidal concave mirror 3 is made of resin or glass material,
The reflective surface is vapor-deposited with silver or aluminum, and a protective film is formed on the reflective surface to have a reflectance of 90% or more. In addition, the display 1, the plane mirror 2, the toroidal concave mirror 3
Is housed in a box (not shown), and this box is assembled in the dashboard in front of the passenger seat so that the angle can be adjusted. Then, by adjusting this box, the reflection position of the irradiation light emitted from the display 1 on the windshield 5 can be adjusted. That is, it is possible to compensate for changes in the position of the eyes caused by individual differences by adjusting the reflection position.

Further, as shown in FIG. 1, a corner sonar 6 is installed at a tip position of the vehicle lower than the tip display mark image 4. The corner sonar 6 is a detection device that measures the distance between the vehicle and the obstacle using a wave having a constant cycle such as an ultrasonic wave. FIG. 3 is a block diagram of the vehicle end position display device configured as described above. In FIG. 3, when the driver turns on the display switch S, the control circuit 7 drives the display control circuit 8 to turn on the display 1. And corner sonar 6
When the presence of the obstacle is detected, the control circuit 7 receives the output signal from the corner sonar 6, controls the display control circuit 8 according to the output signal, and causes the display 1 to blink or light.

Next, the operation of the control circuit 7 provided in the vehicle end position display device of this embodiment will be described with reference to the flow chart shown in FIG. In step 10, by detecting the ON state of the display switch S, the process proceeds to the next step 20. In step 20, the display 1 is turned on by driving the display control circuit 8.
When the display 1 is turned on, the irradiation light emitted from the display 1 is reflected at the point D of the windshield through the plane mirror 2 and the toroidal concave mirror 3, and the tip display mark image 4 is displayed at a predetermined position. .

In step 30, by operating the corner sonar 6, the corner sonar 6 measures the distance L between the front end position of the vehicle and the obstacle, and based on the output signal from the corner sonar 6 according to the measured distance L. , The distance L between the vehicle tip position and the obstacle is recognized. Step 4
At 0, based on the distance L between the vehicle tip position and the obstacle recognized in step 30, L is 20 cm or more and 5
It is determined whether or not it is within the range of 0 cm or less. At this time, when L is in the range of 20 cm or more and 50 cm or less, in step 45, the display 1 is controlled to blink at 3 to 5 Hz via the display control circuit 8. That is, the driver visually recognizes that the tip display mark image 4 blinks, and thereby the distance L between the tip position of the vehicle and the obstacle is L.
It can be recognized that has become smaller than 50 cm. If L is not in the range of 20 cm or more and 50 cm or less, the process proceeds to step 50.

In step 50, the distance L between the vehicle tip position recognized in step 30 and the obstacle is 20 cm.
If it is smaller, in step 55, the display control circuit 8 controls the display 1 to blink at 6 to 10 Hz. That is, the driver can recognize that the distance to the obstacle has been shortened by visually recognizing the blinking display that is faster than the tip display mark image 4 blinking in step 45. If L is not smaller than 20 cm, that is, if L is larger than 50 cm, the process proceeds to step 60.

In step 60, the display switch S
When the ON state is detected, the process returns to step 30 when the ON state is detected, and the process proceeds to step 70 when the OFF state is detected. That is, in step 60, OF
Until the F state is detected, the processing operations of Steps 30 to 60 are repeated. In step 70,
The front end display mark image 4 is erased by turning off the display 1 via the display control circuit 8.

By ending the above processing, the processing operation performed in the control circuit 7 is ended. From the above, since the corner sonar 6 is installed at a position lower than the tip display mark image 4 in the vehicle end position display device of the present embodiment, for example, the tip display mark image 4 and the obstacle are Even if it is difficult to grasp the relative positional relationship of the vehicle (when there is an obstacle at a position lower than the bonnet), the corner sonar 6 accurately detects the distance between the vehicle tip position and the obstacle. can do. Then, the driver can easily see the relative positional relationship between the vehicle and the obstacle only by visually recognizing the tip display mark image 4 by the display in which the tip display mark image 4 blinks according to the detected distance. And it can be grasped accurately.

The recognition distance of the tip display mark image 4 is
Individual differences may occur. However, by using the corner sonar 6, the individual difference in the recognition distance can be compensated. Further, when the corner sonar 6 is difficult to detect, for example, with respect to an obstacle such as a wire mesh or a fence that does not reflect ultrasonic waves very much, the relative position between the tip display mark image 4 and the obstacle can be confirmed. In this case, this drawback can be compensated.

FIG. 5 shows a display state of a display 1 as another embodiment. For example, the same effect can be obtained even if the display control circuit 8 switches the display to the tip display mark image as shown in FIG. In the present embodiment, the display control circuit 8 controls the display of the liquid crystal display panel 10. However, for example, as shown in FIG. 6, the display control circuit 8 is replaced by the display color control circuit 18, and the liquid crystal control circuit 10 is controlled. May be changed to the color single plate filter 20 to switch the display color.

[Brief description of drawings]

FIG. 1 is a configuration diagram illustrating a vehicle end position display device according to an embodiment.

FIG. 2 is a configuration diagram of a display device 1 that constitutes an end position display device for a vehicle.

FIG. 3 is a block diagram showing a vehicle end position display device.

FIG. 4 is a flowchart showing a processing operation of a control circuit 7.

5 is a configuration diagram showing another state of the display device 1. FIG.

FIG. 6 is a configuration diagram showing a display 1 of another embodiment.

[Explanation of symbols]

 1 indicator 2 plane mirror 3 toroidal concave mirror 4 tip display mark image 6 corner sonar 7 control circuit

Claims (1)

[Claims] 1. An end position display device for a vehicle for forming and displaying an image of an end mark display member near an end position of a vehicle, wherein the end mark display member is located at a position lower than the image forming position of the end mark display member. It is provided and occurs with the movement of the vehicle,
A distance detecting unit that detects a distance between the end position and an obstacle; and a control unit that controls display of an image of the end mark display body based on the distance detected by the distance detecting unit, An end position display device for a vehicle characterized by the above.