JPH05213097A - Display for automobile - Google Patents

Abstract

PURPOSE:To make brightness and magnification and the like changeable by a simple structure wherein the image reflection direction of any one of a half mirror face and a full mirror face having different reflection characteristics respectively is made to be in comformity with the visually recognizing direction by turning movement of a mirror. CONSTITUTION:A magnetic sensitive piece 24 is attracted through current supply to a solenoid 4 and a mirror 2 is held at a second display position. The half mirror beam reflected on a half mirror face 21 among image light beams coming from a display 1 is reflected in the direction A, and the full mirror beam reflected on a full mirror face 22 is reflected in the direction B, that is the direction to enable a driver to see the display 1. When current supply to the solenoid 4 is blocked, the mirror 2 is turned clockwise and positioned at a first display position. Then, only the half mirror light beam reflected on the half mirror face 21 is reflected in the direction B, that is the direction where the eyes of driver are fixed. Since the half mirror face 21 and the full mirror face 22 have different reflection characteristics, image display with different brightness and magnification can be selected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle display device.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 55-1
Japanese Laid-Open Patent Publication No. 10892 discloses two display units arranged substantially orthogonal to each other, and a half mirror arranged obliquely between them.
Disclosed is a display device for a vehicle, which is provided with a liquid crystal shutter provided on the rear surface of the half mirror and is capable of switching between two screens.

According to this vehicular display device, since two screens can be switched and displayed within the same viewing angle, it is possible to switch and view a plurality of screens without moving the field of view, and it is possible to visually recognize the image during driving and the space. It is advantageous from the standpoint of removing soot.

[0004]

In recent years, there has been a demand for a display device for a vehicle to change the display characteristics of the same screen, such as the brightness and the enlargement ratio, according to the driving environment. It is not impossible to meet this demand with the above-mentioned conventional device, but the above-mentioned conventional device has a drawback that it requires a complicated structure such as a plurality of display devices and liquid crystal shutters.

The present invention has been made in view of the above problems, and an object thereof is to provide a vehicular display device capable of changing display characteristics with a simple structure.

[0006]

A display device for a vehicle according to the present invention includes a display portion arranged in a vehicle compartment for displaying a predetermined image.
It has a half mirror surface on the front side and a full mirror surface on the back side that has a reflection characteristic different from that of the half mirror surface, and has a wedge-shaped cross section arranged rotatably in front of the display section. A mirror portion, a first display position for rotating the mirror portion to reflect light from the display portion in a visible direction by the half mirror surface, and light from the display portion to the full mirror. -A mirror rotation unit that selects either one of the second display position for reflecting in the visible direction by the surface.

The reflection characteristic in the present invention means, for example, a difference in the amount of light at the time of visually recognizing light from the both reflecting surfaces, an image enlargement ratio and the like.

[0008]

When the mirror rotating part rotates the mirror part to the first display position, the half mirror surface semi-reflects light from the display part in a visible direction, and the mirror rotating part mirror part. When is rotated to the second display position, the full mirror surface totally reflects the light from the display portion in the visible direction. Since the half mirror surface and the full mirror surface have different reflection characteristics as described above, when the mirror rotating portion is driven to rotate the mirror portion, the visual characteristics of the display image on the display portion are changed. To be done.

[0009]

As described above, according to the vehicle display device of the present invention, the rotation of the mirror portion causes the image light reflection direction of either the half mirror surface or the full mirror surface having different reflection characteristics. Since it adopts a configuration that matches the viewing direction, it is possible to change the image display form, such as its brightness and magnification, with a simple configuration and without moving the eyes, depending on the driving environment and preference. The image display can be selected appropriately.

[0010]

【Example】

(Embodiment 1) Hereinafter, an embodiment of a vehicle display device of the present invention will be described with reference to FIG. This device is housed together with other meter devices (not shown) in a cluster 7 which is a case attached to the upper edge of a vehicle dashboard (not shown). The upper surface is supported by the dash board (not shown) and is covered by a pad 6 extending substantially horizontally from the lower edge of the windshield toward the rear of the vehicle compartment.

A direct light emission type display unit (display unit in the present invention) 1 is fixed substantially downward on the lower surface of the top plate portion 71 of the cluster 7, and this display unit 1 displays VFD (fluorescent display tube). Type digital vehicle speed display device. A mirror (display section in the present invention) 2 is disposed immediately below the display 1 in the cluster 7, and a rotating shaft 2 is provided on both sides of the mirror-2.
0 is projected. The rotating shaft 20 is rotatably supported by a shaft hole (not shown) provided in the cluster 7, and thereby the Mira-2 is rotatable.

The mirror-2 is made of a transparent acrylic plate having a wedge-shaped cross section that extends obliquely from the front upper side to the rear lower side, and the upper surface 21 thereof is made into a half-miller surface by silver vacuum deposition processing, and the lower surface thereof. Numeral 22 has a full mirror surface by silver vacuum deposition processing. A solenoid (a mirror rotating portion in the present invention) 4 made of an electromagnet is fixed to the inner surface of the back side plate of the cluster 7, and a stopper plate 42 made of a magnetic material is provided at the upper end of the magnetic core material 41 of the solenoid 4. It is fixed.

An iron magnetic sensitive piece 24 is fixed to the stopper plate 42 at the tip 23 on the front upper side of the mirror 2 so that it can be attracted to the stopper plate 42. When the solenoid 4 is energized, the magnetic sensitive piece 24 is stopped. It is adsorbed by 42 and the Mira-2 can be urged to rotate counterclockwise. On the other hand, a resin supporting piece 26 is fitted to the thick width end portion 25 on the rear lower side of the Mira-2, and one end of the coil spring is fixed to the upper surface of the bottom plate 72 of the cluster 7 (referred to in the present invention. Mirror-rotating part) 5
The other end of the mirror is fixed to the support piece 26, so that the mirror-2
Is urged to rotate in the clockwise direction.

Further, the side end of the cluster 7 on the driver side, that is, the rear side of the vehicle is opened for the driver to visually recognize the display, and this opening is shielded by the acrylic transparent plate 8 to prevent dust from entering the cluster 7. Prevents intrusion. Less than,
The operation and detailed structure of this device will be described. Solenoid 4
When the magnetic sensitive piece 24 is attracted to the stopper plate 42 by energizing the mirror plate 2, the mirror-2 is held at the second display position shown in FIG. At this time, of the image light emitted from the display 1,
The half mirror light reflected by the half mirror surface 21 is shown in FIG.
The full-mirror light reflected in the direction A shown in FIG. 2 and reflected by the full-mirror surface 22 is reflected along the center line 9 (hereinafter referred to as the line of sight) in the direction B shown in FIG. As a result, only the full mirror light is visible to the driver.

When the energization of the solenoid 4 is cut off, the coil spring 5 rotates the mirror-2 clockwise.
After turning by a predetermined angle, the supporting piece 26 of the Mira-2 is moved to the cluster 7
Since it abuts against the stopper surface 73 formed on the upper surface of the bottom plate 72 (see FIG. 2), Mira-2 is held at this first display position. At this time, of the image light emitted from the display 1,
The harmylar light reflected by the humilla surface 21 is reflected in the A direction as shown in FIG. 2, and the flumylar light reflected by the flumilar surface 22 is in the C direction shown in FIG. 2, that is, the driver's visual range. It is reflected out so that only the half mirror light is visible to the driver.

Here, the reflectance of the half mirror surface 21 is a
If (for example, about 13)%, the transmittance is b (about 65)%, and the reflectance of the full mirror surface 22 is c (about 90)%, about a ( For example, about 13)%
Will come out of Mira-2 as half-light.
Similarly, of the image light incident on the Mira-2, b × b ×
c (for example, about 38)% is Mira-2 as full-mirror light
Will come out of.

After all, the driver can visually recognize an image that is about three times brighter in the second display position shown in FIG. 1 than in the first display position shown in FIG. In addition, at the position of the half mirror surface 21 in FIG. 1, the full mirror surface 22 in FIG.
It goes without saying that it is preferable to come. In the above-described embodiment, the reflected light image of the mirror surface 21 and the reflected light image of the mirror surface 22 when the angle between the mirror surface 21 and the mirror surface 22 of the mirror-2 is small. And may enter the eye as a double image.

In order to prevent this, the above-mentioned included angle is increased, or a light control film (LCF) is attached to the acrylic transparent plate 8 to selectively transmit only the light in the gaze direction, Light that deviates in the other direction should be excluded as much as possible. (Embodiment 2) Another embodiment of the present invention is shown in FIGS.

This device is the same as the device of the first embodiment except that the half mirror surface 21 is concave (see FIGS. 1 and 2).
Is different from If this is done, the half mirror surface 2
With 1, the display image enlarged by a predetermined magnification can be visually recognized. Of course, the full mirror surface 22 may be a concave surface, or a convex surface may be adopted.

Further, in each of the above embodiments, the display 1 may be illuminated by light from other lighting equipment. The energization of the solenoid 4 may be controlled by a manual switch, or may be automatically switched by detecting a change in illuminance inside the vehicle or other driving environment.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a vehicle display device of the present invention in which a mirror is at a second display position,

FIG. 2 is a sectional view showing the embodiment in which the mirror is in the first display position,

FIG. 3 is a sectional view showing another embodiment in which the mirror is in the second display position,

4 is a cross-sectional view showing the embodiment of FIG. 3 with the mirror in the first display position,

[Explanation of symbols]

 1 is an indicator (display part) 2 is a mirror (mirror part) 4 is a solenoid (mirror rotation part) 5 is a coil spring (mirror rotation part) 21 is a half mirror surface 22 is a full mirror surface

Claims (1)

[Claims] 1. A display unit disposed in a vehicle compartment for displaying a predetermined image, a front side having a half mirror surface, and a rear side having a full mirror surface having a reflection characteristic different from that of the half mirror surface. And a mirror portion having a wedge-shaped cross section, which is rotatably disposed in front of the display portion, and the mirror portion is rotated to allow light from the display portion to pass through the half mirror surface. A first rotation position for reflecting in the visible direction and a second rotation position for reflecting the light from the display unit in the visible direction by the full mirror surface, and a mirror rotation unit for selecting one of them. A display device for a vehicle, comprising: