JPH05229366A - Head-up display device - Google Patents

Abstract

PURPOSE:To provide a head-up display capable of providing a clear virtual image. CONSTITUTION:A final reflecting plate 6 which receives the emitted light of a hologram lens 4 which receives the light of an indicator 2 to image a virtual image display image and enters the light to a light permeable reflecting plate (combiner) 8 is formed of a mirror, and the inclination of the mirror is regulated by a rotating mechanism 10 so that a clear virtual image can be provided according to the visual line of a driver.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head-up display device for projecting and displaying an image displayed by a display device on a translucent reflector (combiner) arranged in the visual field in front of a driver's seat.

[0002]

2. Description of the Related Art A conventional head-up display device of this type has, for example, a structure as shown in FIG. In other words, 1 is a projector fitted in the internal space of the instrument panel provided in front of the driver's seat, and this projector 1 includes a display device 2 such as a liquid crystal display or a fluorescent display tube, and the display device 2. A light source 3 installed behind and used when the display device 2 is of a transillumination type, and a first mirror 5 and a second light source 3 for reflecting an image displayed by the display device 2 on a hologram lens 4.
It has a mirror 6 inside.

A combiner 8 for reflecting the display image reflected by the hologram lens 4 in the line-of-sight direction is attached to the windshield 7 of the automobile, and the driver 9 is a display device reflected by the combiner 8. The display image of can be viewed as a virtual image in front of the windshield.

The hologram lens 4 is designed so that the inclination angle of the hologram lens 4 can be adjusted by the rotating mechanism 10 as desired.
According to the position of the eye point, the inclination of the hologram lens 4 can be adjusted as shown in FIG. 2 so that the virtual image reflected and displayed on the combiner can be seen most easily.

[0005]

However, as in the conventional structure, the hologram lens 4 having a concave curved surface is used.
In the hologram lens inclination degree adjusting means for adjusting the inclination of the hologram image to a position where it is easy to see the virtual image, by changing the inclination of the hologram lens 4, the angle of light incident on the hologram lens 4 shifts due to the curved surface. However, the virtual image viewed from the driver is blurred, distorted, double-imaged, etc., resulting in a decrease in the clarity of the virtual image.

[0006]

SUMMARY OF THE INVENTION The present invention has been made by paying attention to such a conventional problem. The final reflecting plate which is made incident on a translucent reflecting plate (combiner) is a mirror, and the inclination of the mirror is It is an object of the present invention to provide a head-up display device that can be adjusted so as to obtain a clear virtual image according to the line of sight of the driver.

That is, according to the present invention, in a projector in which a plurality of mirrors and a hologram lens for allowing a display image to be displayed on the display device to reach the translucent reflection plate are arranged on the optical path, the translucent reflection plate is used instead of the projector. The final reflection plate that illuminates the display image is a plane mirror, and a displacement mechanism that can adjust the tilt angle of the plane mirror is provided to clear the virtual image reflected by the translucent reflection plate. This is the development of a head-up display device that can maintain the quality.

[0008]

EXAMPLES The present invention will be described in detail below with reference to the examples shown in FIGS. 3 and 4. The same parts of the structure of this example and the structure described in the conventional example were used in the conventional example. The same reference numerals are given and the description of the same structural parts is omitted.

That is, in the present embodiment, the display image from the display 2 incorporated in the projector 1 is reflected in the order of the first mirror 5, the hologram lens 4 and the second mirror 6. , Is incident on the combiner 8.

That is, the display image produced by the display 2 is the first
The reflected image is reflected by the mirror 5 and is incident on the hologram lens 4 having a concave curved surface, and the display image incident on the hologram lens 4 is magnified and reflected by the hologram lens 4. The wavelength is selected, and when external light (sunlight) enters the projector 1, the external light is selected so as not to affect the durability of the display device.

The display image reflected by the hologram lens 4 is incident on the combiner 8 via the second mirror 6 having a flat reflecting surface, and the display image is displayed as a virtual image in front of the windshield 7 by the combiner 8. However, since the inclination of the reflection surface of the second mirror 6 can be freely adjusted by the rotation mechanism 10, its virtual image position corresponds to the eye line-of-sight position. The second mirror 6 is placed so that it is in the most visible position.
The tilt angle of can be adjusted.

As described above, in this embodiment, since the hologram lens 4 provided in the reflection path of the display image is fixed at a fixed position, a virtual image due to the deviation of the incident angle of the hologram lens 4 is formed. It is possible to prevent display blur, distortion, occurrence of double image, and the like. Further, since the inclination angle of the second mirror 6 which is a plane provided at the final stage of the reflection path can be adjusted, the displacement of the virtual image due to the displacement of the eye point caused by the change of the driver can be easily seen at the position where it is most easily seen. Can be modified to.

[0013]

As described above, according to the present invention, information display such as characters and figures is reflected by the windshield 7 of the vehicle or the translucent reflection plate 8 provided in front of the windshield 7 to forward the windshield. In a head-up display device that includes a projector 1 that projects a virtual image display image and displays the information by superimposing it on a landscape of the outside world, the projector 1 includes a display 2 that displays the information by light emission, and a display 2 of the display. The plane mirror includes a hologram lens 4 that receives light to form the virtual image display image at a distance, and a plane mirror 6 that receives light emitted from the hologram lens 4 and reflects it toward the translucent reflection plate 8. Since the head-up display device is capable of displacing the mounting angle of 6 by the rotating mechanism 10, it is provided in the reflection path of the display image. Hologram lens 4 because it is secured in place, it is possible to prevent the virtual image of the display blur due to the deviation of the incident angle of the hologram lens 4, distortion, the occurrence of a double image in advance. Further, since the inclination angle of the second mirror 6 which is a plane provided at the final stage of the reflection path can be adjusted, the displacement of the virtual image due to the displacement of the eye point caused by the change of the driver can be easily seen at the position. The effect is that it can be modified to.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a conventional example.

FIG. 2 is an operation explanatory view of a conventional example.

FIG. 3 is a structural explanatory view of an embodiment of the present invention.

FIG. 4 is an explanatory view of the operation of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Projector 2 ... Indicator 3 ... Light source 4 ... Hologram lens 5 ... 1st mirror 6 ... 2nd mirror 7 ... Windshield 8 ... Combiner 9 ... Driver (eyepoint) 10 ... Rotation mechanism

Claims (1)

[Claims] 1. A virtual image is displayed in front of the windshield by reflecting information display such as characters and figures on a windshield (7) of a vehicle or a translucent reflector (8) provided in front of the windshield (7). In a head-up display device that includes a projector (1) that projects an image and that displays the information by superimposing it on a landscape of the outside world, the projector (1) includes a display device (2) that emits and displays the information,
A hologram lens (4) for receiving the light of the display to form the virtual image display image at a distance, and a plane for receiving the light emitted from the hologram lens (4) and reflecting it toward the translucent reflector (8). A head-up display device, comprising: a mirror (6), wherein a mounting angle of the plane mirror (6) can be displaced by a rotating mechanism (10).