JPH07309152A - Display device for vehicle - Google Patents

Abstract

PURPOSE:To provide a display device for vehicle which can display a farther distance display while forming the whole body of the display device compact, in a head-up type display device for vehicle in which the display device is provided inside a dashboard, and a far distance display is carried by utilizing reflector members at the front side of a driver seat. CONSTITUTION:By utilizing the first reflector plate 10 and the second reflector plate 11 provided to the limited space of a display device, the display light from a display unit 4 is transmitted through the first reflector plate 10 and reflected by a mirror 5', and then, it is reflected to the front side direction of the vehicle by the first reflector plate 10, and furthermore, the reflected light is reflected again by the second reflector plate 11 to the mirror 5, and the light is directed to the eye point 6 of the driver finally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reflects the display light of a display disposed inside a dashboard by a reflecting member in front of a driver's seat, and a virtual image of a display image of the display is displayed by the reflecting member at the driver's seat. The present invention relates to a display device for a vehicle, which is visible from the outside and provides driving information of the vehicle to a driver.

[0002]

2. Description of the Related Art Conventionally, there is a display device shown in FIG. 3 in which a display device is arranged inside a dashboard and a distant display is performed using a reflecting member in front of a driver's seat.

This device is called a head-up display device, and an opening 3 having a translucent cover (not shown) is mounted on the upper surface of the dashboard 1 of the vehicle and near the inside of the windshield 2. In the interior of the dashboard 1, a self-luminous display device 4 for displaying driving information such as a traveling speed of which the display surface 4a is directed to the windshield 2 side through the opening 3 is formed. It is arranged. Further, in a part of the windshield 2 on the dashboard 1 side, for example, an opaque reflection surface 5 having a ceramic coating of black or the like on one of the laminated surfaces of the laminated glass of the windshield 2 is used as a reflective member. The reflective surface 5 is formed so that the display light from the display 4 is emitted.

In the conventional display device, the display light from the display device 4 is reflected by the reflecting surface 5 and travels toward the driver's eye point 6, whereby the display light from the eye point 6 is changed. The virtual image 7 of the display image of the display 4 can be visually recognized at the reflection surface 5 portion, and the reflection surface 5 can be used to perform the distant display.

[0005]

However, in the above-described conventional vehicle display device, the driver's eye point 6 is displayed only once by reflecting the display light of the display device 4 once on the reflecting surface 5 of the windshield 2. Since they are directed toward each other, the optical path length of the display light is not so long, and the virtual image 7 of the display image of the display 4 is displayed.
There is an inconvenience that the effect of displaying far away in front of the windshield 2 cannot be sufficiently obtained.

Therefore, if the distance from the display surface 4a of the display unit 4 to the reflecting surface 5 is increased, the above-mentioned inconvenience can be solved, but for that purpose, the display unit 4 is deep inside the dashboard 1. Should be placed in
As a result, the entire display device becomes large, and there is the inconvenience that a lot of space is required inside the dashboard 1. In particular, in recent vehicles, many parts are disposed inside the dashboard 1 including the display device, but these various parts are required to be space-saving, and only the display device is required. There can be no exceptions.

The present invention has been made in view of the above points, and is a head-up type vehicle display device in which a display device is arranged inside a dashboard and a distant display is performed by using a reflecting member in front of a driver's seat. It is an object of the present invention to provide a vehicular display device capable of further distant display while forming the entire display device compactly.

[0008]

In order to achieve the above object, a vehicular display device according to the present invention is provided with a display device for displaying information on a dashboard portion of a vehicle, and a display light from the display device is provided. In a vehicle display device that is reflected by a reflecting member in the front of the driver's seat so that the virtual image of the display image of the display can be visually recognized from the driver's seat at the reflecting member portion, on the upper surface side of the display surface of the indicator, A first reflecting plate is provided which has a light-transmitting property and transmits the display light from the display device to be reflected by the reflecting member, and reflects the reflected light in the front direction of the vehicle. In the front of the plate, at least one second reflecting plate that reflects the reflected light reflected by the first reflecting plate to the reflecting member is arranged.

Further, preferably, the display light transmitted from the display from the first reflection plate is reflected at a right angle by the reflection member, and the display of the display is further provided. The surface is arranged substantially parallel to the reflecting surface of the reflecting member.

[0010]

According to the present invention, the first reflecting plate and the second reflecting plate arranged in the limited space of the display device are utilized,
The display light from the display is transmitted through the first reflecting plate, reflected by the reflecting member in front of the driver's seat, and then reflected by the first reflecting plate in the front direction of the vehicle. The reflection plate is reflected again by the reflection member to finally go to the driver's eye point. Therefore, at least three times before the display light is finally reflected by the reflection member and goes to the eye point. The light is reflected (the number of reflections increases as the number of the second reflectors increases), the optical path length of the display light can be increased, and sufficient distant display can be performed.

Further, since the display light transmitted from the display from the first reflection plate is reflected at a right angle by the reflection member, the optical axis of the display coincides with the optical axis of the reflection member, and the first reflection plate. The width of the optical path of the display light which is transmitted through and is reflected by the reflection member is minimized, whereby the width of the first reflector is set to the necessary minimum and the entire display device can be made compact. It is a thing.

Further, by arranging the display surface of the display device substantially parallel to the reflection surface of the reflection member, the virtual image of the display image can be arranged perpendicular to the line of sight, and the display image without distortion can be visually recognized. Is what you can do.

[0013]

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2 show an embodiment of a vehicular display device according to the present invention, in which an opening 3 is formed on the upper surface of a dashboard 1 of a vehicle and near the inside of a windshield 2. , The windshield 2 of this opening 3
A hood portion 8 that is substantially parallel to the windshield 2 is formed upright on the side edge portion. The hood portion 8 is formed, for example, at a height such that the upper end 8a thereof does not exceed the line connecting the driver's eye point 6 and the tip of the hood of the vehicle, so that the driver's view is not obstructed.

Further, on the wall surface of the hood portion 8 facing the opening 3, there is provided a mirror 5'as a reflecting member for visually recognizing a virtual image 7 of a display image of the display 4 which will be described later.
a'is oriented toward the opening 3 side, and the display surface 4a is substantially parallel to the mirror 5'at a shallow position inside the dashboard 1 below the vehicle compartment side edge 3a of the opening 3. And a display device 4 including a fluorescent display tube (VFD), a light emitting diode (LED), a liquid crystal display device with a backlight (LCD), and the like, the display light of which is directed to the mirror 5 '.

Further, optical path restricting portions 9, 9 extending above the display surface 4a are formed above both side edges of the display surface 4a of the display 4, and the optical path restricting portions 9, 9 are formed. At the upper end portion of 9, the first reflecting plate 10 having a light-transmitting property has its reflecting surface 10a directed toward the reflecting surface 5a 'of the mirror 5'and the reflecting surface 11a side of a second reflecting plate 11 described later, that is, It is arranged and held so as to be inclined toward the front of the vehicle. In the case of this embodiment, the first reflector 10 forms an angle of about 45 ° with the mirror 5 '.

Further, at the bottom of the opening 3 and in front of the first reflecting plate 10, its reflecting surface 11a is a reflecting surface 5a 'of the mirror 5'and a reflecting surface 10a of the first reflecting plate 10. The second reflecting plate 11 facing the side is provided,
The second reflecting plate 11 extends from a part of the optical path restricting portion 9 and is held by holding portions 12 and 12 provided at one end of the mirror 5 '. In the case of this embodiment, the second reflector 11 forms an angle of about 90 ° with the mirror 5 '.

Next, the operation of this embodiment will be described.
In the present embodiment, when display light such as a digital display of vehicle speed is emitted from the display surface a of the display 4,
The display light is transmitted through the first reflecting plate 10 while the irradiation direction is regulated by the optical path regulating section 9 and is reflected at a right angle by the mirror 5 '. The reflected light reflected at a right angle by the mirror 5'is reflected by the first reflecting plate 10 in the forward direction of the vehicle, and further, the first light is reflected.
The reflected light reflected by the reflecting plate 10 is reflected again by the second reflecting plate 11 toward the mirror 5 '. Then, the light reflected by the mirror 5'again is directed to the driver's eye point 6 by the mirror 5 ', whereby the display image of the display 4 displayed far from the eye point 6 is displayed. The virtual image 7 can be visually recognized at the mirror 5 portion.

In this case, in the present embodiment, the display light from the display 4 is changed to the first light by using the first reflection plate 10 and the second reflection plate 11 arranged in the limited space of the display device. 1 After passing through the reflector 10 and reflected by the mirror 5 ',
Since the light is reflected by the first reflector 10 in the forward direction of the vehicle, and the reflected light is reflected again by the mirror 5'on the second reflector 11 so as to finally reach the eye point 6 of the driver. Finally, the display light is reflected by the mirror 5'and is reflected three times before going to the eye point 6, so that the optical path length of the display light can be made long and sufficient distant display can be performed. is there.

That is, as shown in FIG. 2, the distance from the display surface 4a of the display 4 to the first reflecting plate 10 is a, the distance from the first reflecting plate 10 to the mirror 5'is b, and the first reflecting plate. 1
The distance from 0 to the second reflector 11 is c, and the second reflector 11 is
If the distance from the mirror 5'to the mirror 5'is d, the distance L from the mirror 5 ', which is the final reflection position of the display light, to the virtual image 7 is
It becomes a + 2b + c + d. On the other hand, if the arrangement position of the display device 4 does not change, the distance L'on the optical axis of the conventional type in which the light is reflected by the reflecting member in front of the driver's seat is a + b. B + c + d compared to things
The virtual image 7 of the display image can be displayed far away by a distance of minutes.

Further, in this embodiment, the display light from the display 4 transmitted through the first reflection plate 10 is reflected at a right angle on the reflection surface 5a of the mirror 5'and is directed to the first reflection plate 10. As a result, the optical axis of the display 4 and the optical axis of the mirror 5'are aligned with each other. Therefore, it is possible to minimize the width of the optical path of the display light which is transmitted through the first reflection plate 10 and reflected by the mirror 5 '.
Assuming that the width of the first reflector 10 is the minimum necessary,
The entire display device can be made compact.

Further, the display surface 4a of the display 4 is arranged substantially parallel to the reflecting surface 5a of the mirror 5 ', so that the virtual image 7 of the display image is arranged perpendicular to the line of sight. Therefore, a display image without distortion can be visually recognized.

Therefore, in this embodiment, the display light is finally reflected by the mirror 5'by using the first reflector 10 and the second reflector 11 arranged in the limited space of the display device. 3 before being reflected and going to eyepoint 6
Since the light can be reflected once, the display unit 4 can be arranged deep inside the dashboard, that is, the optical path length of the display light can be increased without increasing the size of the entire display device. The distant display can be performed, and the visibility of the driver can be improved.

In the above embodiment, only one second reflecting plate 11 is arranged between the first reflecting plate 10 and the mirror 5 ', but a plurality of the second reflecting plates are used to form the first reflecting plate. Reflector 1
If the reflected light at 0 is sequentially reflected by the plurality of second reflectors and finally reflected by the mirror 5 ', the number of reflections will increase, and the optical path length will be made longer. You can

[0024]

As described above, according to the vehicular display device of the present invention, the display device can be used by utilizing the first reflector and the second reflector arranged in the limited space of the display device. Display light is transmitted through the first reflecting plate and is reflected by the reflecting member in front of the driver's seat, and then is reflected in the front direction of the vehicle by the first reflecting plate, and this reflected light is further reflected by the second reflecting plate. Since it is reflected again by the reflection member and finally directed to the driver's eye point, the optical path length of the display light can be made long, and the display device as a whole can be made compact while displaying a sufficient distance. Therefore, it is possible to improve the visibility of the driver.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a vehicle display device according to the present invention.

FIG. 2 is a schematic configuration diagram in which an essential part of FIG. 1 is enlarged.

FIG. 3 is a schematic configuration diagram showing a conventional vehicle display device.

[Explanation of symbols]

 1 Dashboard 2 Windshield 3 Opening 4 Display 4a Display surface 5'Mirror 6 Eyepoint 7 Virtual image 8 Hood part 9 Optical path control part 10 1st reflector 11 2nd reflector 12 Holding part

Claims (3)

[Claims] 1. A display device for displaying information is provided on a dashboard portion of a vehicle, and display light from the display device is reflected by a reflecting member in front of a driver's seat to display a virtual image of a display image on the display device. In a vehicular display device that can be viewed from the driver's seat in the reflective member portion, on the upper surface side of the display surface of the display device, the display member from the display device that has translucency and transmits the display light from the display member is used. A first reflecting plate that reflects the reflected light and reflects the reflected light in the front direction of the vehicle is provided, and the reflected light reflected by the first reflecting plate is provided in front of the first reflecting plate to the reflecting member. A display device for a vehicle, wherein at least one second reflecting plate for reflecting the light is disposed. 2. The vehicle display device according to claim 1, wherein display light transmitted from the display unit through the first reflection plate is reflected at right angles by the reflection member. 3. The vehicle display device according to claim 1, wherein the display surface of the display is arranged substantially parallel to the reflection surface of the reflection member.