JPH0557937B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a vehicle tip position display device that uses a head up display device to allow a driver to visually confirm the tip position of the vehicle.

(Prior Art) When parking a vehicle in a garage or driving on a narrow road, the front end of the vehicle may accidentally come into contact with a wall, utility pole, or other obstacle. For this reason, traditionally, a pole was placed at the front end of the vehicle (or the left front end in the case of a right-hand drive vehicle) and the distance between this pole and a wall or other obstacle was visually measured to determine whether or not contact would occur. , the distance to the wall is measured by projecting two beams onto the wall and visually observing changes in the irradiation pattern (Japanese Patent Laid-Open No. 50-21762 and Publication No. 56-35771).

However, in the case of the conventional method, since poles and other protrusions are attached to bumpers etc., there is a risk of contact with pedestrians, and since force is applied to the pole attachment point, the vehicle body, There was a problem that the bumper etc. were damaged and the design of the vehicle was damaged. The latter also has the problem that if the lens becomes dirty with mud or the like, beam irradiation becomes incomplete and distance cannot be measured.

On the other hand, conventionally, driving information such as vehicle speed, mileage, remaining fuel level, time, and various warnings were displayed using meters, clocks, or warning lamps installed on the instrument panel, but recently drivers have been able to display these information while driving. In order to view driving information without having to take one's eyes away from the front field of vision, a display device has been developed that focuses the driving information on the outside of the windshield (for example, Japanese Patent Laid-Open No. 57-182541). ), it is called a head-up display device.

Therefore, it would be convenient if this head-up display device could be used to confirm the position of the front end of the vehicle.

(Object and Structure of the Invention) An object of the present invention is to solve the above-mentioned problems by using a head-up display device and to make it possible to visually recognize the position of the leading end of the vehicle. A display body was installed, and an image of the front end mark of the display body was formed in the vicinity of the front end of the vehicle using optical display means.

(Example) The present invention will be explained below based on the drawings.

FIG. 1 is a diagram showing an embodiment of a vehicle tip position display device according to the present invention. In the figure, 1
a, 1b, and 1c are plane mirrors; 2 is a tip mark display body; a display board 21 having a tip mark 22a in a semi-transparent pattern as shown in FIG. 2; and a lamp 2;
3 and case 24. 3 is a switch that turns on and off the lamp 23, and 4 is a windshield that functions as a combiner. Plane mirrors 1a, 1b, 1
In c, the light emitted from the display body 2 is reflected by the plane mirrors 1, 1b, and 1c.
It is installed so that it is reflected at points A, B, and C above and then reflected at point D on the windshield and enters the driver's eyes E, and furthermore, reflection point D on the windshield is connected to point E and the vehicle. The position and direction of the plane mirror 1c are set so that it is on a straight line connecting the front end.

With the above configuration, when the driver turns on the switch 3 in a parking lot, etc., the lamp 23 in the tip mark display body 2 lights up, and the light exiting the tip mark display body 2 is directed to points A, B, C, and D. It reaches the driver's eyes E through. Since the distance traveled by this light, that is, the optical path length, is made to match the distance from the driver to the left front end of the vehicle, the driver sees the tip mark display image 22b at the same distance and in the same direction as the front end of the vehicle. By superimposing the tip mark display image 22b of the corner and the obstacle in that direction, it is possible to easily compare the distance and accurately judge whether or not there will be contact.

Next, FIG. 3 shows a second embodiment of the vehicle tip position display device according to the present invention. Components in the figure that are the same as those in FIG. 1 are given the same reference numerals.
In this embodiment, a lens 5 is used to shorten the optical path length, thereby reducing the size of the device. The focal length of the lens 5 and the distance between the lens 5 and the tip mark display body 2 are set so that the tip mark display image 22b is formed at the front end position of the vehicle.

Note that instead of providing the lens 5, it is also possible to install a concave mirror 6 at point C as shown in FIG. 4, or to use a lens and a concave mirror together.

Next, FIG. 5 shows a third embodiment of the vehicle tip position display device according to the present invention. Components in the figure that are the same as those in FIG. 1 are given the same reference numerals. In this embodiment, a combiner 7 is installed separately from the windshield 4.
is provided on which the tip mark display image 22b is reflected, thereby increasing the degree of freedom in attaching the mirror 1c, lens 5, and tip mark display body 2. In other words, if the windshield 4 is used as a combiner, the installation location is restricted because the optical system of the device interferes with the air conditioner duct inside the dart board, but if the combiner 7 is used, the optical path can be changed and the installation position of the optical system can be restricted. can be determined freely to some extent. Furthermore, the light transmittance of the combiner 7 is lowered by using colored glass or the like to increase the contrast between the background and the display image, and the tip mark display image 22b is
can be made easier to see.

In the above three embodiments, the tip mark display image 22b is displayed on the left front end of the vehicle, but the present invention is not limited to this, and as shown in FIG. It is also possible to project the tip mark display image 22b in front, and this can be easily achieved by adjusting the position or direction of the plane mirror 1c, lens 5, and tip mark display body 2 to change the display direction or distance. . Furthermore, the position of the rear end of the vehicle can also be displayed using a similar configuration.

(Effects of the Invention) As explained above, in the present invention, a tip mark display body is installed in the vehicle interior, and the tip mark is imaged and displayed near the tip of the vehicle by optical display means. Because of this structure, it is possible to easily see the end position of the vehicle only when necessary, without providing a protrusion such as a pole or a beam lamp for distance measurement.

In addition, in the second embodiment, the device can be made smaller by using a lens, and in the third embodiment, the degree of freedom in mounting the device is increased by providing a separate combiner, and the tip mark Visibility can be improved by increasing the contrast of the displayed image.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the vehicle tip position display device according to the present invention, FIG. 2 is an enlarged view of the tip mark display body in FIG. 1, and FIGS. 3 to 6 are according to the present invention. FIG. 3 is a schematic diagram showing another embodiment of the vehicle tip position display device. 1a, 1b, 1c...plane mirror, 2...tip mark display body, 3...switch, 4...windshield, 5...lens, 6...concave mirror, 7...combiner, 22a...tip mark, 22b ...Tip mark display image.

Claims (1)

[Claims] 1. A tip position display device for a vehicle, comprising a tip mark display body provided in a vehicle interior, and an optical display means for displaying an image of the tip mark near the tip of the vehicle.