JP2001341551A - Vehicular display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular display device that miniaturizes a first display with a screen directed at the reflecting surface of a light transmitting reflective member and thus improves the visual luminance of the first display. SOLUTION: Display light from the first display 4 is expansively totally reflected to a driver's seat side on a light transmitting reflective member 6 with a concave reflecting surface and can be viewed from the driver's seat side. Display light from a second display 3 is transmitted through the light transmitting reflective member 6 and can be viewed from the driver's seat side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a vehicle, and more particularly, to a display device for a vehicle in which a plurality of display devices are multiplexed in the same display range.

[0002]

2. Description of the Related Art Conventionally, as this type of vehicle display device,
For example, there is one as shown in FIG. In the figure, a half mirror 2 is mounted in a meter case 1 so that its reflection surface is inclined toward a driver's seat. Behind the half mirror 2, for example, a light-emitting instruction display 3 indicating the engine speed is provided with its display surface facing the driver's seat side. Further, a light-emitting type liquid crystal display 4 is attached to the upper part of the meter case 1 with its display surface facing the reflection surface of the half mirror 2.

In addition, a protective cover for protecting the indicator 3, the liquid crystal display 4, and the half mirror 2 and preventing dust from entering the inside is provided at an opening on the front side of the meter case 1. 5 is attached.

According to the above configuration, the liquid crystal display 4
Performs light emission display, the display light is reflected by the half mirror 2 and the liquid crystal display 4 can be visually recognized from the driver's seat. On the other hand, when the indicator 3 performs light emission display, the display light passes through the half mirror 2 and the indicator 3 can be visually recognized from the driver's seat.
As a result, multiple displays by both the instruction display 3 and the liquid crystal display 4 can be visually recognized from the driver's seat within the same display range.

[0005]

By the way, when light is incident on a reflection surface of a light-transmitting reflection member such as the above-mentioned half mirror 2 at a critical angle or more, the incident light is totally reflected, and the operation is difficult. It is known that the viewing brightness of that light from the seat can be maximized. Then, the display surface of the liquid crystal display 4 is directed in a direction in which the display light is incident on the reflection surface of the half mirror 2 at a critical angle or more, and the display light is totally reflected by the reflection surface of the half mirror 2 to be visually recognized. It is conceivable to improve the brightness.

However, in the above-described conventional display device for a vehicle, the half mirror 2 projects a virtual image having the same size as the actual display surface of the liquid crystal display 4 on the driver's seat side. In order to improve the size, it is necessary to increase the size of the liquid crystal display 4 to some extent. Therefore, in such a large liquid crystal display 4, the meter case 1
Position is restricted. As a result, as described above, it is very difficult to direct the display surface of the liquid crystal display 4 in a direction in which the display light is incident on the reflection surface of the half mirror 2 at a critical angle or more, due to the size of the dashboard. There is a problem that the luminance cannot be improved by total reflection.

In view of the above, the present invention focuses on the above-described problems, and reduces the size of the first display device whose display surface is provided to face the reflection surface of the light-transmissive reflection member. It is an object of the present invention to provide a display device for a vehicle that improves the luminance of the first display device without increasing the display brightness.

[0008]

According to a first aspect of the present invention, there is provided a light transmitting / reflecting member having a concave reflecting surface facing a driver's seat, and a display surface. A first light-emitting indicator disposed toward the concave reflecting surface of the light-transmissive reflecting member, and a display surface facing the driver's seat, and disposed behind the light-transmitting reflecting member. And a light emitting type second display, wherein the display surface of the first display is directed in a direction in which the display light is incident on the reflection surface of the light transmitting reflection member at a critical angle or more. A vehicle display device.

According to the first aspect of the invention, the display light from the first display device is expanded and totally reflected toward the driver's seat side by the light transmitting / reflecting member having the concave reflecting surface, and is visually recognized from the driver's seat side. It becomes possible. The display light of the second display is transmitted through the light-transmissive reflection member, and becomes visible from the driver's seat side. Therefore, the display light from the first display can be enlarged by the light transmitting reflection member having the concave reflection surface, and the first display can be miniaturized. Moreover, due to the miniaturization of the first display,
Since the display surface of the first display can be freely oriented in any direction, the display surface can be easily oriented in such a direction that the display light is incident on the reflection surface of the light transmitting reflection member at a critical angle or more. it can.

According to a second aspect of the present invention, in the vehicle display device according to the first aspect, the light transmissive reflection member is formed of a transparent body.

In the invention according to claim 2, the light transmissive reflection member is formed of a transparent body. Therefore, since the display surface of the first display device is opened in a direction in which the display light of the first display device is incident on the reflection surface of the light-transmissive reflection member at a critical angle or more, the display device can be moved from a highly transparent object such as a transparent body. Even if the light-transmitting reflector is formed, the display light from the first display device is totally reflected and can be visually recognized. For this reason, a member such as a half mirror is not required as the light transmissive reflection member.

According to a third aspect of the present invention, there is provided the vehicle display device according to the second aspect, wherein the light-transmitting reflective member is subjected to a coloring process.

According to the third aspect of the present invention, since the light-transmitting reflective member is subjected to a dark coloration treatment,
When the second display and the second display do not emit light, they are not visually recognized from the driver's seat side. Moreover, by performing the coloring treatment, the reflectance of the light transmissive reflection member is reduced, so that reflection of external light can be prevented.

According to a fourth aspect of the present invention, in the vehicle display device according to any one of the first to third aspects, the protective cover for protecting the second display by diverting the light-transmissive reflecting member. Is formed in the vehicle display device.

According to the fourth aspect of the present invention, a protective cover for protecting the second display is formed by diverting the light transmissive reflection member. Therefore, since the light-transmitting reflection member has a concave reflection surface, it can be used as a protection cover without impairing the original function of the protection cover for preventing reflection of external light.

According to a fifth aspect of the present invention, in the vehicle display device according to any one of the first to fourth aspects, the display light from the first display device is enlarged so that the light-transmitting reflecting member is formed. The vehicle display device further includes an enlarging member that enters the reflection surface.

According to the fifth aspect of the present invention, the magnifying member magnifies the display light from the first display and makes it incident on the reflection surface of the light transmissive reflection member. Therefore, the display light from the first display is further enlarged by the enlargement member, so that the size of the first display can be further reduced.

According to a sixth aspect of the present invention, in the display device for a vehicle according to the fifth aspect, the magnifying member magnifies and reflects display light from the first display, and the light transmissive reflecting member. The vehicle display device is characterized by being formed by a reflecting member having a concave reflecting surface which is incident on the vehicle.

According to the sixth aspect of the present invention, the magnifying member is formed by a reflecting member having a concave reflecting surface that magnifies and reflects the display light from the first display and makes it incident on the light transmitting reflecting member. Is done. Therefore, by using a reflecting member having a concave reflecting surface as the enlarging member, the enlarging member can be easily formed. In addition, after the display light from the first display is once reflected by the reflection member and then incident on the light-transmissive reflection member, a virtual image in which the first display appears to be far away can be transmitted through the light-transmissive reflection member. It can be projected on a reflecting member.

According to a seventh aspect of the present invention, in the vehicle display device according to any one of the first to sixth aspects, the first display device is provided with a low reflection process for reducing a reflectance of the display surface. The present invention is directed to a vehicle display device.

According to the seventh aspect of the present invention, the first display is subjected to a low reflection process for reducing the reflectance of the display surface. Therefore, the first display is provided on the driver's seat side because the display surface is disposed toward the concave reflecting surface of the light-transmitting reflection member directed to the driver's seat side, and external light is provided on the first display. It may be incident on the display surface. Paying attention to the above, by performing low-reflection processing for reducing the reflectance on the display surface of the first display, reflection of external light on the display surface of the first display can be suppressed.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of the vehicle display device of the present invention. In FIG. 1, the display device for a vehicle includes a curved glass 6 provided at an opening of a meter case (not shown) and having a concave reflecting surface facing the driver's seat side. The curved glass 6 is formed of a transparent material having high transmittance such as transparent glass, and its surface is subjected to a dark coloring treatment (smoke treatment) for reducing the transmittance.

Behind the curved glass 6, as a second display, for example, a light-emitting instruction display 3 for indicating the engine speed is provided with its display surface facing the driver's seat side. I have. The instruction display 3 has an instruction display surface 3a on which a scale corresponding to the instruction of the engine speed is formed.
A pointer 3b for instructing the engine speed, and the pointer 3b
3c for driving the display, an instruction display surface 3a,
And an instruction light source 3d for illuminating the hands 3b.

A light-emitting liquid crystal display 4 as a first display is attached to the lower part of a meter case (not shown) with its display surface facing the concave reflection surface of the curved glass 6. The liquid crystal display 4 has a liquid crystal display surface 4a for displaying traffic congestion information and the like taken in from, for example, a receiver for a road traffic information system (hereinafter abbreviated as a VICS receiver). In addition, on the liquid crystal display surface 4a,
Smoke processing or anti-grain processing for reducing the reflectance of the display surface 4a is performed.

The liquid crystal display 4 also has a liquid crystal display surface 4a.
And a diffusion plate 4c provided between the liquid crystal display surface 4a and the liquid crystal light source 4b, for diffusing light from the liquid crystal light source 4b and entering the liquid crystal display surface 4a. . The liquid crystal display surface 4a is directed in such a direction that the display light is incident on the concave reflecting surface of the curved glass 6 at a critical angle or more.

The operation of the vehicle display device having the above configuration will be described below. First, the instruction light source 3d and the liquid crystal light source 4
When b is off, the curved glass 6 is visually recognized as a dark color. When only the instruction light source 3d is turned on, the light of the instruction light source 3d causes the instruction display surface 3a and the pointer 3b to be turned on.
Shines. Then, the display light passes through the curved glass 6, and the indication display surface 3 a and the pointer 3 b emerge from the curved glass 6 which is visually recognized in the driver's seat side.

On the other hand, when the above-mentioned instruction light source 3d is turned off and only the liquid crystal light source 4b is turned on, the liquid crystal light source 4d is turned off.
b is diffused by the diffusion plate 4c, and then the liquid crystal display surface 4
a, and the liquid crystal display surface 4a shines. Then, the display light is incident on the concave reflection surface of the curved glass 6 and the incident display light is reflected toward the driver's seat side by the reflection surface of the curved glass 6, so that the display light is visually recognized as a dark color system on the driver's seat side. The liquid crystal display surface 4a emerges from the curved glass 6 so as to appear. As is clear from the above, the curved glass 6
Constitutes a light transmissive reflection member.

Since the reflecting surface of the curved glass 6 is concave, the display light from the liquid crystal display 4 is enlarged and displayed by the magnifying action of the concave reflecting surface.
As a result, the size of the liquid crystal display 4 can be reduced, and the mounting position of the liquid crystal display 4 in the meter case is not limited, and the liquid crystal display surface 4a of the liquid crystal display 4 is not limited.
Can be turned freely in any direction.

Therefore, as described above, it is possible to easily direct the liquid crystal display surface 4a in a direction in which the display light from the liquid crystal display 4 is incident on the reflection surface of the curved glass 6 at a critical angle or more. Since the display light from 4 is totally reflected by the reflection surface, the visible brightness of the liquid crystal display 4 can be improved.

Further, as described above, the display light from the liquid crystal display 4 is totally reflected by the reflection surface, so that the curved glass 6
The curved glass 6 may be formed of a light-transmitting transparent body such as a transparent glass as described in the above configuration, without using a material having a high reflectance.

Since the liquid crystal display 4 has its liquid crystal display surface 4a facing the concave reflecting surface of the curved glass 6 facing the driver's seat, the liquid crystal display 4 is closer to the driver's seat than the curved glass 6. Provided. Therefore, there is a good possibility that external light is incident on the liquid crystal display surface 4a. Therefore, as described above, if a smoke process or an anti-glare process that reduces the reflectance of the liquid crystal display surface 4a is performed, reflection of external light on the liquid crystal display surface 4a is prevented, and the reflection surface of the curved glass 6 is No light is incident, and the visibility of the liquid crystal display 4 can be further improved.

Further, as described above, the curved glass 6 is subjected to a coloring treatment of a dark color so that the display light source 3d and the liquid crystal light source 4b are turned off when the respective display units 3d are not lit.
Alternatively, the design 4 can be improved without being visually recognized from the driver's seat side. Moreover, the reflectance of the curved glass 6 can be reduced, the reflection of external light can be prevented, and the visibility of each display 3 or 4 can be improved.

In the present embodiment, the curved glass 6 not only functions as a light-transmissive reflection member, but also functions as an indicator 3.
Can be diverted as a protective cover for protecting Since the curved surface of the curved glass 6 has a concave shape,
Even if the curved glass 6 is used as a protective cover, the original function of the protective cover for preventing reflection of external light is not lost.

In the above-described embodiment, the curved glass 6 made of a transparent material such as a transparent glass is used as the light transmitting / reflecting member. The light-transmissive reflective member may be formed from a member configured with a metal film (reflective film) interposed therebetween. However, it is better to use the curved glass 6 formed of only a transparent body such as a transparent glass as in the above-described embodiment as the light-transmitting reflection member, and to form the member constituting the light-transmitting reflection member and to form the member. Since the number of processes can be reduced, the cost is low.

In the above-described embodiment, the liquid crystal display 4
Was directly incident on the curved glass 6, but the display light from the liquid crystal display 4 was enlarged so that the reflecting surface for entering the reflecting surface of the curved glass 6 was provided with a concave magnifying member. Is also good. Specifically, as shown in FIG. 3, a concave mirror 7 that reflects display light from the liquid crystal display 4 and makes it incident on the curved glass 6 may be further provided.

Therefore, the liquid crystal display 4 can be further enlarged and displayed by the enlargement effect of the concave reflecting surface, and the size of the liquid crystal display 4 can be further reduced, and the space can be saved. In addition, the display light from the liquid crystal display 4 is once reflected by the concave mirror 7 and is incident on the curved glass 6, so that the virtual image of the liquid crystal display 4 projected on the curved glass 6 is far from the driver's seat side. This makes it possible to increase the visual recognition speed from the driver's seat side. In addition, by using a reflecting member such as a concave mirror 7 having a concave reflecting surface as the enlarging member, the enlarging member can be easily formed, and the cost can be reduced.

[0037]

As described above, according to the first aspect of the present invention, the light-transmitting reflecting member having the concave reflecting surface is provided.
The display light from the first display can be enlarged,
Can be miniaturized. In addition, since the display surface of the first display device can be freely oriented in any direction due to the miniaturization of the first display device, the display light can easily reach the reflection surface of the light transmitting reflection member at a critical angle or more. Since the display surface can be directed in such a direction as to enter, it is possible to obtain a vehicular display device in which the visibility of the first display is improved without increasing the space.

According to the second aspect of the present invention, since the display surface of the first display is directed in a direction in which the display light is incident on the reflection surface of the light transmitting reflection member at a critical angle or more, Even if the light transmissive reflector is formed from a highly transmissive object such as a transparent body, the display light from the first display device is totally reflected and can be visually recognized. For this reason, since a member such as a half mirror is not required as the light transmissive reflecting member, it is possible to obtain a vehicle display device that can reduce costs.

According to the third aspect of the present invention, when the first display device and the second display device do not emit light, they are not visible from the driver's seat side. Can be. Moreover, since the reflectance of the light transmissive reflective member is reduced by performing the coloring process, the light transmissive reflective member that can prevent the reflection of external light is subjected to a dark coloration process. A display device for a vehicle that can further improve visibility can be obtained.

According to the fourth aspect of the present invention, since the reflection surface of the light-transmitting reflecting member is formed in a concave shape, the protective cover for preventing reflection of external light is not impaired. Therefore, it is possible to obtain a vehicle display device capable of reducing costs.

According to the fifth aspect of the present invention, the display light from the first display is further enlarged by the enlargement member, whereby the size of the first display can be further reduced. A display device for a vehicle that saves space can be obtained.

According to the sixth aspect of the present invention, by using a reflecting member having a concave reflecting surface as the enlarging member, the enlarging member can be easily formed, so that the cost can be reduced. In addition, after the display light from the first display is once reflected by the reflection member and then incident on the light-transmissive reflection member, a virtual image in which the first display appears to be far away can be transmitted through the light-transmissive reflection member. Since the image can be projected on the reflecting member, it is possible to obtain a vehicle display device capable of increasing the visual recognition speed of the first display.

According to the seventh aspect of the invention, the reflection of external light on the display surface of the first display is reduced by performing a low reflection process for reducing the reflectance on the display surface of the first display. As a result, it is possible to obtain a vehicle display device that can further improve visibility.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a vehicle display device of the present invention.

FIG. 2 is an exploded perspective view showing an example of the vehicle display device of the present invention.

FIG. 3 is a cross-sectional view illustrating an example of a conventional vehicle display device.

[Explanation of symbols]

 6 Light-transmitting reflective member (curved glass) 4 First display (liquid crystal display) 3 Second display (indicating display) 7 Reflective member (concave mirror)

Claims (7)

[Claims] 1. A light-transmitting reflection member having a concave reflection surface facing a driver's seat, and a light-emitting type reflection member arranged with a display surface facing the concave reflection surface of the light transmission reflection member. A first display, and a light-emitting second display having a display surface facing the driver's seat side and disposed behind the light-transmissive reflective member; A display device for a vehicle, wherein the display surface is directed in a direction in which the display light is incident on the reflection surface of the light transmitting reflection member at a critical angle or more. 2. The vehicular display device according to claim 1, wherein the light transmissive reflection member is formed of a transparent body. 3. The vehicle display device according to claim 2, wherein the light-transmissive reflection member is subjected to a coloring process. 4. The vehicle display device according to claim 1, wherein the light-transmissive reflection member is diverted to form a protective cover for protecting the second display. Vehicle display device. 5. The display device for a vehicle according to claim 1, wherein the display light from the first display device is enlarged to be incident on a reflection surface of the light-transmissive reflection member. A display device for a vehicle, further comprising a member. 6. The vehicular display device according to claim 5, wherein the magnifying member magnifies and reflects the display light from the first display device and makes the display light incident on the light transmissive reflecting member. A display device for a vehicle, comprising: a reflecting member having a surface. 7. The vehicular display device according to claim 1, wherein the first display device has been subjected to a low reflection process for reducing a reflectance of the display surface. Vehicle display device.