JPH058661A - Head-up display device for vehicle - Google Patents

Abstract

PURPOSE:To eliminate a plane mirror out of a head-up display device for a vehicle as well as to make the device small in size. CONSTITUTION:When a head-up display device 12 is installed in an instrument panel 11, an indicator 16 is faced upward, and light is irradiated to a transparent reflecting plate (combiner) 18 through a light beam normally reverse prism 19. This constitution thereby enables a plane mirror to be eliminated.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A conventional head-up display device of this type is shown in FIG.
This is in the instrument panel 1 in front of the driver's seat,
A main body case 3 having an opening 2 on the upper surface is embedded, and inside the main body case 3, a fluorescent display tube (VF).
The display device 4 according to T) and the plane mirror 5 for reflecting the display image from the display device 4 are arranged, and the opening 2 further includes:
A transparent cover 6 is provided to prevent dust from entering the body case 3. A translucent reflection plate 8 serving as a half mirror is provided on the inner surface of the windshield 7 located above the instrument panel 1, and the display image of the display 4 is displayed on the plane mirror 5 and the translucent reflection plate. The display image is displayed by the display device 4 together with the scene in front of the vehicle after being reflected by the light-transmissive reflection plate 8.

[0003]

However, in such a vehicle head-up display device,
Since the display image by the display 4 is irradiated to the front of the front and the front irradiation image is reflected by the plane mirror 5 to the translucent reflection plate 8, the plane mirror 5 is used in the display device. However, there is a problem that the entire display device becomes large in size by incorporating the plane mirror 5.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and an object of the present invention is to reduce the size of a display device by omitting a plane mirror in a vehicle head-up display device. In other words, the display surface of the display device 4 is directed upward toward the windshield, and the arrangement of the plane mirror is omitted, thereby enabling downsizing of the display device. Further, the present invention provides a head-up display device for a vehicle in which a prism is arranged above the upward display device and a display image from the display device can be accurately irradiated onto the translucent reflector (combiner) 8. ..

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the embodiments shown in the drawings.

In FIG. 2, reference numeral 11 denotes an instrument panel of an automobile, which is an instrument panel 11
A head-up display device 12 is installed inside the. This head-up display device 12
Is a case 13 having an open upper surface, a wiring board 14 mounted in the case 13, a support 15, a display 1
6 is provided, but the display surface of the display 16 is installed in the case 13 so as to face upward. At the upper side of the display 16, that is, at the opening of the case 13, the display 16 is provided.
An optical axis regulating prism 19 for irradiating the translucent reflection plate (combiner) 18 attached to the windshield 17 with the display image is attached.

As described above, in this embodiment, since the display surface of the display 16 of the display device is directed upward toward the windshield, the reflection image of the display 16 is reflected by the plane mirror. It is possible to irradiate the translucent reflection plate 18 without using it. Therefore, by omitting the plane mirror, the overall shape of the head-up display device 12 can be downsized, so that the internal space of the instrument panel, which is a narrow space, can be reduced. It can be effectively used. Further, since the prism for controlling the optical axis is arranged above the display surface of the display unit 16, the display unit 16
It is possible to irradiate the combiner 18 with the display image by the method accurately and improve the display performance.

In the above embodiment, the prism 19 is used as a means for regulating the optical axis of the display image, but the invention is not limited to this. For example, a Fresnel type prism 20 as shown in FIG. 3 is used. Even if it does, the same effect as the above-mentioned embodiment can be obtained.

[0009]

As described above, according to the present invention, the information display such as characters and figures is reflected by the windshield of the vehicle or the translucent reflection plate 18 provided in front of the windshield to display a virtual image in front of the windshield. Projector 12 for projecting
In a head-up display device for displaying the information by superimposing it on the scenery of the outside world, the projector 12 is provided with a display 16 having a light emitting display surface directed upward.
And a prism 19 or 2 which is arranged between the display 16 and the translucent reflection plate 18 to bend the optical axis in the combiner direction.
Since it is a vehicular head-up display device configured with 0, according to this, since the display surface of the display device 16 is directed upward toward the windshield, the reflection image by the display device 16 is It is possible to irradiate the translucent reflection plate 18 without using a plane mirror, and therefore the entire shape of the head-up display device 12 can be miniaturized by omitting the plane mirror. The space can be used effectively. Further, by disposing a prism for controlling the optical axis above the display surface of the display device 16, the display image by the display device 16 can be accurately irradiated toward the combiner 18 and the display performance can be improved. There is an effect that can be.

[Brief description of drawings]

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

FIG. 2 is an explanatory view showing an embodiment of a head-up display device according to the present invention.

FIG. 3 is an explanatory view showing another embodiment of the present invention.

[Explanation of symbols]

11 ... Instrument panel 2 ... Head-up display device 13 ... Case 14 ... Wiring board 15 ... Support 16 ... Indicator 17 ... Windshield 18 ... Translucent reflector 19 ... Prism 20 ... Fresnel prism

Claims (1)

Claim: What is claimed is: 1. A virtual image display image is displayed in front of the windshield by reflecting information display such as characters and figures on a windshield of a vehicle or a translucent reflector (18) provided in front of the windshield. A head-up display device, comprising: a projector (12) for projecting an image, and displaying the information by superimposing it on a landscape of the outside world.
And a display (16) with the light emitting display surface facing upwards,
A prism (1) disposed between the display (16) and the translucent reflector (18) to bend the optical axis in the combiner direction.
9. A head-up display device characterized by comprising 9) or 20).