JPH0342695A - Head-up display - Google Patents

Abstract

PURPOSE:To prevent the visibility of an operator from lowering by superposing and viewing the transmitted image of a front glass, information from a display information source and the light of a multicolor caution lamp. CONSTITUTION:A combiner 1 is arranged on the inner side of the front glass 2 and the multicolor caution lamp 4 is set at a position where the visual field of landscape is not sacrificed within the range equal to or under the line of sight combining an eye E and a bonnet 3 below the back surface of the combiner 1. Meanwhile, an enlarged virtual image 8 is information obtained by an electronic shutter LCD 5, a light source 6, a Fresnel lens 7 and the combiner 1. Therefore, since the caution lamp 4 is viewed through the combiner 1, it is recognized without sacrificing the visual field. thus, the visibility of an operator is prevented from lowering.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a head-up display provided on a dash board of a vehicle such as an airplane, train, or automobile.

The conventional technology head-up display (hereinafter referred to as HUD) is
For example, in the cockpit of an airplane, the pilot can check necessary information without having to turn his/her line of sight from the flight direction to the dash board.
No. 7212 (1973) and U.S. Patent No. 4218
It is known from Specification No. 11 (1980). One of the conventional HUDs put into practical use as a high-grade type for airplanes is equipped with a CRT 24 for displaying information and an optical system 25 for enlarging the displayed image of the CRT 24 in the dash board, as shown in Fig. 5. , a combiner 26 is provided on the top plate of the dash board to reflect the displayed image, and the display is generally a monochromatic blue-green color, and the idea of superimposing and displaying a red display such as a caution lamp using a combiner is not described. It has not been.

The one shown in Figure 4 is one that appeared for automobiles.
It is described in the iO-15422Ei publication. Multi-color information can be viewed by making one of the driving information display lights 18, 19 of a plurality of different colors incident on the combiner 15 at different predetermined angles using a reflector 22, 23. The combiner 15 is formed of a glass 16 and a transparent thin film 17 for selecting the wavelength of reflected light. In addition, 20.2
1 is a handle and a handle shaft. With this configuration, the driver can see the driving information superimposed on the outside scene 11.

Problems to be Solved by the Invention However, in the above prior art, the information display light 18
．． Since 19 is a multi-color display, its light wavelengths are different, and combiner 15 is designed to reflect both wavelengths well.
On the other hand, both wavelengths of landscape transmitted light are no longer transmitted, and the transmitted light is colored, which has the disadvantage of reducing visibility for the operator.

In view of the above-mentioned problems, the present invention uses the combiner's light wavelength selection special feature to provide a warning color such as "red" for half-door caution lamps, handbrake lamps, etc. without sacrificing the operator's field of vision. It is an object of the present invention to provide a HUD in which the warning color can be recognized as being superimposed on the scenery without impairing the brightness of the transmitted scenery.

Means for Solving the Problems In order to achieve the above object, the present invention has the following objectives: Conventional HUD information display colors such as "green light" are well reflected, and scenery transmitted light other than lines "red" and "blue" are well transmitted. Utilizing the characteristics of the combiner, a caution lamp display in red, blue, or a combination of these colors is placed below the back of the combiner in an area that does not sacrifice the driver's field of view, and the warning lamp is reflected through the combiner and reflected from the combiner. It is configured so that it can be viewed directly from the closest and farthest distance compared to conventional HUD information.

Effect: According to the above configuration, caution lamps such as a door ajar indicator lamp in an automobile and a closed door indicator lamp in a vehicle can be seen through the existing HUD combiner, so that they can be recognized without sacrificing the field of view or HUD information. Moreover, since the cockpit is located farthest from the pilot's eyes, there is no need to refocus the eyes when staring at the scenery, which reduces fatigue, similar to HUD information.

Embodiment An embodiment in which the present invention is applied to an automobile dash board will be described with reference to FIGS. 1 to 3. FIG. 1 is a configuration diagram of the HUD in this embodiment, in which a combiner 1 is arranged on the inner surface of the windshield 2, and a multicolor caution lamp 4 is located at the lower part of the back of the combiner 1 within the line of sight connecting the eye E and the bonnet 3. It is located in a position that does not compromise the landscape view.

On the other hand, the enlarged virtual image 8 is HUD information obtained by the electronic shutter L CD 5, the light source 6, the Fresnel lens 7, and the combiner 1.

FIG. 2 is a diagram showing how the caution lamp 4 is placed at the eye E through the combiner 12. Reference numeral 9 indicates the right half door, 10 indicates the left half door, and 11 indicates an abbreviation for warning lamps such as a handbrake or battery discharge, and indicates the relationship with the dash board 13 and the bonnet 14.

In the above configuration, the right side caution lamp indicating that the door is ajar or closed is located at the lower right corner of the combiner, the left side caution lamp is located at the lower left corner of the combiner, and the handbrake,
Multiple /llE lamps such as battery discharge lamps are placed in the center of the bottom of the combiner, each with good visibility.
Easy-to-understand abbreviations are preferred.

FIG. 3(a) shows a spectroscopic analysis when a green light source is used as the light source 6 in FIG. 1, for example. In this case, the reflection characteristics of the combiner 1 with respect to the wavelength are shown in (b), and the transmission characteristics with respect to the wavelength of landscape light are shown in (c). Looking at the transmission characteristics of (C), since B10nm r red or 4[ion m r blue] transmits well, it is possible to choose red and blue as the colors for the caution lamp placed at the bottom of the back of the combiner. It shows that it can be done.

Effects of the Invention According to the present invention, for example, it is possible to see through a combiner a caution lamp of a color that is easily transmitted by a "red" or "blue" combiner without spoiling the external view, and furthermore,
Easily and easily, without sacrificing control field of view.
It is possible to obtain a HUD with a multicolor caution lamp that is easy to recognize.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of a HUD in an embodiment of the present invention, Figure 2 is a layout diagram of specific abbreviations for caution lamps, and Figure 3 (
a), (b), and (c) are respectively the spectroscopic analysis characteristics of the green light source used.
The reflection characteristic diagram, the transmission characteristic diagram, and FIGS. 4 and 5 are +IIIY diagrams of a conventional HUD. 1. Combiner 2. Windshield, 3. Bonnet, 4. Caution lamp, 5. Electronic shutter L
CD1 Ei... Light source, 7... Fresnel lens, 8...
・Enlarged virtual image HUD information, 9..Right half door caution lamp, 10..Left half door caution lamp, 11..Other caution lamps, 12..combiner 13..Dashboard, 14..bonnet section.

Claims (1)

[Claims] a semi-transparent reflector disposed inside the windshield; a multicolored caution lamp disposed at a position that can be recognized by the driver through the translucent reflector at a lower portion between the windshield and the semi-transparent reflector; and the semi-transparent reflector. It is characterized by comprising a display information source arranged to give a light image from the lower part of the reflector, and superimposing the image transmitted through the windshield, the information from the display information source, and the light from the multicolor caution lamp. Head-up display.