JPH0752681A - Vehicle end position display unit - Google Patents

Abstract

PURPOSE:To provide a vehicle end position display unit which allows easily acquiring a sense of distance between an obstacle and its virtual image. CONSTITUTION:An index 16 for recognizing the end position of a vehicle is projected toward a transmissive combiner 13 installed at the front of the driver's seat, and the combiner 13 reflects the index 16 toward the eye point E of the driver's seat 11 to create a virtual image of the index 16 in front of the vehicle; a reflecting film 19 is formed on the back side of the combiner 13 so that virtual images X1, X2 are shown overlapping each other with a longitudinal gap between them, which are the index reflected by the surface 20 of the combiner 13 and that reflected by the back side of the combiner 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for a vehicle in which a virtual image of an index for recognizing a vehicle tip position is presented in front of the vehicle and the driver can visually recognize the virtual image so that the driver can recognize the tip position of the vehicle. The present invention relates to improvement of a tip position display device.

[0002]

2. Description of the Related Art Conventionally, a light source unit 3 including a lamp 1 and an index 2 for recognizing a vehicle tip position shown in FIG.
As shown in FIG. 2, the index 2 is provided on the front part of the vehicle and is reflected by the plane reflecting mirrors 4, 5 and 6 provided on the front part of the vehicle to project it on the windshield 7 functioning as a combiner. Eyepoint E of driver's seat 8
There is known a vehicular tip position display device for reflecting a virtual image 9 of the index 2 at a predetermined position in front of the vehicle (see, for example, JP-A-62-34824). This vehicle tip position display device is used to prevent the vehicle from colliding with an obstacle. Reference numeral 10 is a switch for turning on and off the lamp 1.

[0003]

However, in this conventional vehicle tip position display device, the virtual image 2 presented in front of the vehicle is recognized by the driver in a planar manner, and it is difficult to recognize the virtual image 2 with a depth. The problem remains that it is difficult to grasp the sense of distance between the object and the virtual image 2.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a front end position display device for a vehicle capable of facilitating grasping a sense of distance between an obstacle and a virtual image. To provide.

[0005]

In order to solve the above-mentioned problems, the vehicle tip position display device according to claim 1 of the present invention is transparent to install an index for recognizing the vehicle tip position in the front part of the driver's seat. In a vehicle tip position display device for projecting toward a combiner and reflecting the index toward the eye point of the driver's seat by the combiner to present a virtual image of the index in front of the vehicle, the virtual image is on the surface of the combiner. A reflective film is formed on the back surface of the combiner so that the reflected index and the index reflected on the back surface of the combiner are overlapped with each other and presented in front and back.

In order to solve the above-mentioned problems, the vehicle tip position display device according to claim 2 of the present invention projects an index for recognizing the vehicle tip position toward the transparent combiner installed at the front of the driver's seat. In a vehicular tip position display device that presents a virtual image of the index to the front of the vehicle by reflecting the index toward the eyepoint of the driver's seat by the combiner, the virtual images are presented in an overlapping manner with a front-rear interval. Thus, at least two combiners are provided.

[0007]

According to the vehicle tip position display device according to the first and second aspects of the present invention, the virtual images of the index reflected by the transmissive combiner are presented in front of the vehicle in a manner that they are overlapped with each other at anteroposterior intervals. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle tip position display device according to the present invention will be described below with reference to the drawings.

In FIG. 1, 11 is a driver's seat, 12 is a light source unit, and 13 is a transparent combiner. As shown in FIG. 1B, the light source unit 12 includes a halogen lamp 15 built in a housing 14 and an index 16 for recognizing the tip position. The index 16 is formed on the transparent film by printing or the like.

The light source unit 12 is provided in the vicinity of a room mirror (not shown) inside the ceiling of the passenger compartment. The index 16 is projected on a reflection mirror 17 provided in the vehicle interior ceiling near a room lamp (not shown), and is reflected by the reflection mirror 17 toward the combiner 13. In this way, the optical path length can be lengthened by projecting the index 16 once toward the rear of the vehicle. The combiner 13 is installed on an instrument panel 18.

As shown in FIG. 1C, the combiner 13 is formed of a transparent flat glass or an acrylic plate having a predetermined thickness d. The back surface of the combiner 13 is coated with a reflective film 19. This reflective film 19
Shall be semi-permeable so that the outside can be seen. The index 16 projected toward the combiner 13 is reflected by the surface 20 and guided to the eyepoint E of the driver's seat 11. Further, the index 16 reflected by the reflective film 19 on the back surface thereof is also guided to the eyepoint E of the driver's seat 11. Combiner 1
Since there is a constant optical path length difference between the front surface 20 and the back surface of 3,
Index image Y1 reflected by the surface 20 of the combiner 13
The virtual image X1 based on the index image Y2 reflected by the reflecting film 19 on the back surface of the combiner 13 is presented at a predetermined position in front of the virtual image X1. As a result, the virtual images X1 and X2 are reflected by the surface of the combiner 13 and the index 16 and the combiner 13.
The virtual images X1 and X2 can be visually recognized with a three-dimensional effect by being overlapped with the index 16 reflected on the back surface of the display 16 with a space d'in front and behind. The distance d'is determined by the thickness d of the combiner 13 and its refractive index.

FIG. 2 shows another embodiment of the combiner 13, which is constructed by stacking two transparent flat glass plates or acrylic plates 13a and 13b. This transparent flat glass plate or acrylic plate 1
As shown in FIG. 2, 3a and 13b may be in close contact with each other, or may be arranged with an interval. In addition, a transparent flat glass plate or an acrylic plate 13a,
13b may have the same refractive index or different refractive indexes.

According to this embodiment, the index image Y1 is reflected toward the eyepoint E of the driver's seat 11 by the surface 13a 'of the transparent glass plate or the acrylic plate 13a, and the index image Y1 is reflected.
2 is the surface 13b of the transparent glass plate or acrylic plate 13b
It is reflected toward the eye point E of the driver's seat 11 by ′, and the virtual images X1 and X2 are spaced by a distance d ′ in the front-rear direction based on the thickness d of the transparent glass plate or the acrylic plate 13a and the optical path length difference between the refractive indices thereof. Will be presented in front of the vehicle.

[0014]

As described above, the vehicular tip position display device according to claims 1 and 2 of the present invention has a structure in which the virtual images of the indices are presented in front of the vehicle in a manner that they are overlapped with each other at anteroposterior intervals. Therefore, there is an effect that it is possible to easily grasp the sense of distance between the obstacle and the virtual image.

Further, since it is decided that the virtual image is given a stereoscopic effect only by the combiner, there is an effect that the manufacturing cost is low.

[Brief description of drawings]

FIG. 1 is an explanatory view of a vehicle tip position display device of the present invention,
(A) is a side view for explaining the overall configuration, (b)
[Fig. 3] is a cross-sectional view schematically showing the internal structure of the light source unit shown in (a), and (c) is an enlarged perspective view showing the combiner shown in (a).

FIG. 2 is a perspective view showing another embodiment of the combiner shown in FIG.

FIG. 3 is a perspective view showing a schematic configuration of a conventional vehicle front end position display device.

FIG. 4 is an enlarged perspective view of the light source unit shown in FIG. 3, with a part thereof shown broken away.

[Explanation of symbols]

 11 ... Driver's seat, 13 ... Combiner 16 ... Index 19 ... Reflective film 20 ... Surface E ... Eyepoint X1, X2 ... Virtual image

Claims (2)

[Claims] 1. A virtual image of an index for recognizing a vehicle tip position is projected toward a transparent combiner installed at the front of a driver's seat, and the index is reflected by the combiner toward an eye point of the driver's seat. In the vehicular tip position display device for presenting in front of the vehicle, the virtual image is overlapped with the index reflected on the surface of the combiner and the index reflected on the back surface of the combiner so as to be presented in front and behind. A front end position display device for a vehicle, wherein a reflecting film is formed on the back surface of the combiner. 2. A virtual image of an index for recognizing the position of the front end of the vehicle is projected toward a transparent combiner installed at the front of the driver's seat, and the index is reflected by the combiner toward the eye point of the driver's seat. A front end position display device for a vehicle, characterized in that at least two combiners are provided so that the virtual images are overlapped with each other at a front and rear interval and are presented. apparatus.