JPH06262964A - Display device for car - Google Patents

Abstract

(57) [Abstract] [Purpose] A stereoscopic effect should be provided as a diversified display form. [Structure] The screen 5 on which the display information by the projection light from the projector 11 is projected has a curved surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular display device adapted to various display modes.

[0002]

2. Description of the Related Art In recent years, as a display device for a vehicle, a speedometer display and a tachometer display in an automobile are displayed as analog display,
There are several display forms such as a digital display or a multi-display that simultaneously displays these two display forms, and the display forms are diversifying.

As one example of diversified display forms, there is a technique described in Japanese Utility Model Laid-Open No. 4-37981. In this display device, the indicators constituting the speedometer and the tachometer are arranged so as to be movable in the direction in which the display light travels. The visibility is improved by making it visible through the optical system so that the scale can be magnified.

On the other hand, JP-A-58-129312 and JP-A-58-181036 use it for a vehicle running guidance system for displaying running information such as a road map of a running area of a vehicle, a running route, and a current position. A display device is disclosed. This is because the projector projects and displays on the screen the map information indicating the traveling area of the vehicle recorded on the film, and a thin display member such as an LCD panel or a CRT arranged on the back side of the screen causes The travel route is superimposed and displayed on the map information.

[0005]

However, in such a conventional diversified vehicle display device, the former one can be enlarged and displayed at high speed, and the latter one can be enlarged. Although the multiple display is possible, it did not give a stereoscopic effect in any case.

Therefore, an object of the present invention is to give a stereoscopic effect as a diversified display form.

[0007]

In order to achieve the above object, the present invention has a screen plate arranged at a predetermined portion of the vehicle in front of the driver's visual direction, and the vehicle is mounted on the screen behind the screen plate. A projector is arranged to project and display necessary display information, and the screen plate is formed into a curved surface shape so that an image projected by the projector has a stereoscopic effect.

[0008]

According to the vehicular display device having such a configuration, since the screen plate on which the display information is projected by the projector has a curved shape, the image projected on the screen plate has a stereoscopic effect. Will be things.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a vehicle display device showing an embodiment of the present invention, and FIG. 2 is a front view of the vehicle display device. This vehicular display device is a so-called combination meter which is incorporated in a dashboard of an automobile and accommodates a plurality of instruments such as a speedometer and a tachometer and an indicator in an integrated meter case 1. This meter case 1
The front panel portion 3 facing the driver has an upper surface 3a and a lower surface 3b, and the both surfaces 3a, 3b are joined to each other at a predetermined angle so that the front surface side forms a recess. ing.

Screens 5 and 7 in the shape of spherical bowls, which have a convex curved surface and are non-reflective, are mounted on the left and right sides of the front panel portion 3. The front panel portion 3 to which the screens 5 and 7 are attached does not have the upper surface 3a and the lower surface 3b, but has an opening 9. In the meter case 1 facing the central part of the opening 9, instrument screens such as vehicle speed and engine speed are displayed on screens 5 and 7, or navigation displays in a vehicle running guidance system, graphic displays such as television images, etc. A projector 11 for projecting the display information of is installed. Between the periphery of the projector 11 and the opening 9,
An antireflection plate 13 whose surface has been subjected to antireflection treatment is provided. The projector 11 is driven by a driving device 15 including a control circuit and the like installed on the bottom of the meter case 1. The display information by the projector 11 is, for example, as shown in FIG.
Display the tachometer on the screen 5 by analog instruction,
It is conceivable to display a graphic on the screen 7.

FIG. 3, which shows the internal structure of the projector 11 in an exploded perspective view, summarizes the components for two types of display forms, a tachometer display projected on the screen 5 and a graphic display projected on the screen 7. The light source 17, the reflection plate 19 that collects the light from the light source 17 and emits the light forward, and the light emitted from the reflection plate 19 through the display device unit 21 that forms display information. The optical system 23 that guides the image on the display 7 is the same in both display modes.

In the tachometer display, a dial plate / diffusion plate 25 is provided between the light source 17 and the optical system 23 on the side of the light source 17 and the optical system 2 is provided.
A pointer 27 is provided on each of the three sides. The dial / diffusion plate 25 has a scale and a number printed on it and diffuses the light from the reflection plate 19 uniformly.
Reference numeral 7 indicates the scale and the number by rotating on the dial / diffusion plate 25. The pointer 27 has a tooth portion 27a formed at its base end portion, and the tooth portion 27a meshes with the gear 29. Gear 2
A drive shaft 31a of a movement 31 that drives the pointer 27 is connected to the pointer 9, and the pointer 27 is rotated by a drive of the movement 31 via a gear 29.

On the other hand, in the graphic display, a diffusion plate 33 is provided on the light source 17 side, and a graphic element 35 including a TFT or the like is provided on the optical system 23 side. Also with this graphic element 35, analog display is possible.

According to the vehicular display device having such a structure, in the tachometer display, the light from the light source 17 is reflected by the reflection plate 19 and is condensed on the dial / diffusion plate 25 to be a dial / diffusion plate. By passing through the scales, numbers and pointers 27 on the plate 25, the tachometer instruction information reaches the optical system 23, and this tachometer instruction information is guided to the screen 5 by the optical system 23 and is projected as shown in FIG. Will be done. On the other hand, regarding the graphic display, the light source 1 reflected by the reflection plate 19
The light from 7 is condensed on the diffusion plate 33 and passes through the graphic element 35, so that the graphic information is transferred to the optical system 2.
3 is reached and this graphic information is guided by the optical system 23 onto the screen 7.

The tachometer indication information and the graphic information projected on the screens 5 and 7 are three-dimensionally displayed because the screens 5 and 7 are spherical.
It will be possible to cope with diversification of display forms. In addition, the shape of the screen may be changed to a spherical shape to be an elliptical shape,
Further, the surface may be a curved surface having a concave shape.

FIG. 4 shows another example of the screen shape for the tachometer display. Although the screen 37 has a spherical bowl shape as a whole, it has a spherical shape which is a rotational speed region that exceeds the spherical green zone portion 37a where the engine speed is a predetermined value, for example, up to 5000 rpm. The yellow zone portion 37b is lowered by one step, and the step portion 39 is provided between them. As a result, when the engine speed changes from the green zone to the yellow zone, the pointer is imaged one step deeper, making it possible to perform display with excellent discrimination.

FIG. 5 shows another embodiment. In this embodiment, the spherical screen 41 is a cloudy LCD that switches between a transparent state and a non-transparent state depending on the presence / absence of voltage application. As a display device, a projector 43 is provided at the center.
This is a configuration in which the fluorescent display tubes 45 and 47 are arranged above and below, respectively. Between the display device and the screen 41, an antireflection plate 49 having a surface subjected to antireflection treatment is provided. Portions of the antireflection plate 49 facing the projector 43 and the fluorescent display tubes 45, 47 are openings 51, 53, 55.
Are formed respectively.

When the display by the projector 43 is performed, the voltage application to the screen 41 is released to make it a non-transparent white turbid state, and the analog rotation projected from the projector 43 as shown in FIG. 6A. Project the video on the meter display. When performing display by the fluorescent display tubes 45 and 47, a voltage is applied to the screen 41 to bring it into a transparent state, and as shown in FIG. 6 (b), while the upper fluorescent display tube 45 performs digital speedometer display, The remaining amount of fuel is displayed on the lower fluorescent display tube 47.

As described above, when the screen 41 is a spherical opaque LCD, a stereoscopic display is possible and a plurality of types of display, so-called multi-display, is possible, and various display modes are possible. It will be possible to respond more to the changes.

[0021]

As described above, according to the present invention, since the screen plate on which the display information is projected by the projector has a curved shape, the image projected on the screen plate becomes three-dimensional. It is possible to cope with diversification of display forms.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a vehicle display device showing an embodiment of the present invention.

FIG. 2 is a front view of the vehicle display device of FIG.

FIG. 3 is an exploded perspective view of a projector in the vehicle display device of FIG.

4A is a perspective view showing another example of a screen in the vehicle display device of FIG. 1, and FIG. 4B is a side view of the screen.

FIG. 5 is an exploded side view of a vehicle display device showing another embodiment of the present invention.

6 is an explanatory diagram showing a display example on the vehicle display device of FIG. 5. FIG.

[Explanation of symbols]

 5,7,37,41 Screen 11,43 Projector

Claims (1)

[Claims] 1. A screen plate is arranged at a predetermined portion of the vehicle in front of the driver's visual direction, and a projector for projecting and displaying display information necessary for the vehicle on the screen is arranged behind the screen plate, A display device for a vehicle, wherein the screen plate has a curved surface shape such that an image projected by the projector has a stereoscopic effect.