JP3788809B2 - Vehicle display device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention reflects the display light of the display arranged inside the dashboard by the reflection member in front of the driver's seat, and allows the virtual image of the display image of the display to be visually recognized from the driver's seat by the reflection member portion. The present invention relates to a vehicular display device that provides driving information to a driver.
[0002]
[Prior art]
Conventionally, there is a display device as shown in FIG. 3 that arranges a display device inside a dashboard and performs distant display using a reflective member in front of the driver's seat.
[0003]
This device is called a head-up display device, and an opening 3 with a light-transmitting cover (not shown) is formed on the upper surface of the dashboard 1 of the vehicle and in the vicinity of the inside of the windshield 2. Inside the dashboard 1, a self-luminous display 4 is provided for displaying driving information such as a traveling speed with the display surface 4a directed toward the windshield 2 through the opening 3. ing. Further, in a part of the windshield 2 on the dashboard 1 side, as a reflecting member, for example, an opaque reflecting surface 5 in which one side of the laminated glass of the windshield 2 is coated with a ceramic coating such as black is provided. The display light from the display 4 is radiated to the reflecting surface 5.
[0004]
In the conventional display device, the display light from the display unit 4 is reflected by the reflecting surface 5 and travels toward the driver's eye point 6. The virtual image 7 of the display image can be visually recognized on the reflecting surface 5 portion, and the far-side display can be performed using the reflecting surface 5.
[0005]
[Problems to be solved by the invention]
However, in the conventional vehicle display device, since the display light of the display 4 is reflected once by the reflecting surface 5 of the windshield 2, it is directed toward the driver's eye point 6. There is an inconvenience that the optical path length of light is not so long, and the effect that the virtual image 7 of the display image of the display 4 is displayed far in front of the windshield 2 cannot be obtained sufficiently.
[0006]
Therefore, if the distance from the display surface 4a of the display 4 to the reflection surface 5 is increased, the above-described inconvenience can be solved. For this purpose, the display 4 is disposed deep inside the dashboard 1. As a result, the entire display device becomes large, and there is a disadvantage that a lot of space is required inside the dashboard 1. In particular, in recent vehicles, many parts are arranged inside the dashboard 1 including the display device. However, these various parts are required to save space, and only the display device is used. It cannot be an exception.
[0007]
The present invention has been made in view of the above points, and in a head-up type vehicle display device in which a display device is arranged inside a dashboard and a distant display is performed using a reflective member in front of the driver's seat, It is an object of the present invention to provide a display device for a vehicle that enables further distant display while forming the entire device compact.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a display device for a vehicle according to the present invention is provided with a display for displaying information on a dashboard portion of the vehicle, and the display light from the display is reflected by a reflection member in front of the driver's seat. In the display device for a vehicle in which a virtual image of the display image of the display device can be viewed from the driver's seat at the reflection member portion, the display device has a light transmitting property on the upper surface side of the display surface, and the display A first reflecting plate that transmits display light from the vessel and reflects the reflected light by the reflecting member, and reflects the reflected light in the forward direction of the vehicle, and the first reflecting plate is disposed in front of the first reflecting plate. At least one second reflecting plate for reflecting the reflected light reflected by the reflecting plate to the reflecting member, and the optical axis of the display light transmitted from the display through the first reflecting plate is: It coincides with the optical axis of the display light reflected by the reflecting member after transmission. And which, which is characterized in that so as to reflect at the same point and the reflection light from the first and the second reflective member and the display light transmitted through the reflector plate from the display in the reflective member It is.
[0009]
Also, preferably, in a display surface of the front Symbol indicator which is characterized in that arranged on the reflecting surface and the flat line of the reflecting member.
[0010]
[Action]
According to the present invention, by using the first reflector and the second reflector disposed in a limited space of the display device, the display light from the display device passes through the first reflector and passes through the driver seat. After being reflected by the front reflecting member, it is reflected by the first reflecting plate in the forward direction of the vehicle, and this reflected light is reflected again by the second reflecting plate by the reflecting member, and finally the driver. Because the display light is finally reflected by the reflecting member and reflected at least three times before going to the eye point (if the number of second reflectors increases, Accordingly, the number of reflections increases, and the optical path length of the display light can be increased, and a sufficiently distant display can be achieved.
[0011]
Further, the display light transmitted from the display through the first reflecting plate is reflected at right angles by the reflecting member, so that the optical axis of the display and the optical axis of the reflecting member coincide with each other and pass through the first reflecting plate. Thus, the width of the optical path of the display light reflected by the reflecting member is minimized, so that the entire display device can be compactly formed with the width of the first reflecting plate being the minimum necessary. .
[0012]
Further, by disposing the reflection surface and the flat line of the reflective member the display surface of the display, that the virtual image of the display image is to be placed perpendicular to the line of sight to view the display image without distortion It can be done.
[0013]
【Example】
Embodiments of the present invention will be described below with reference to FIGS.
1 and 2 show an embodiment of a vehicle display device according to the present invention. An opening 3 is formed on the upper surface of the dashboard 1 of the vehicle and in the vicinity of the inside of the windshield 2. FIG. At the edge of the opening 3 on the side of the windshield 2, a hood portion 8 that is substantially parallel to the windshield 2 is formed to rise. For example, the upper end 8a of the hood portion 8 is formed at a height that 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.
[0014]
Further, on the wall surface facing the opening 3 of the hood portion 8, a mirror 5 'as a reflecting member for visually recognizing a virtual image 7 of the display image of the display 4 described later has its reflecting surface 5a' on the opening 3 side. is disposed toward said at the shallow position of the cabin side edge 3a below the opening 3 inside the dashboard 1, the display surface 4a is positioned on a flat line and the mirror 5 ', the display A display 4 comprising a fluorescent display tube (VFD) in which light is directed to the mirror 5 ', a light emitting diode (LED), a backlit liquid crystal display element (LCD), and the like is provided.
[0015]
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. The upper ends of the optical path restricting portions 9, 9 are formed. In the portion, the first reflecting plate 10 having translucency has its reflecting surface 10a directed toward the reflecting surface 5a 'of the mirror 5' and the reflecting surface 11a of the second reflecting plate 11 described later, that is, in front of the vehicle. It is arranged and held inclined toward the direction. In the case of the present embodiment, the first reflecting plate 10 forms an angle of about 45 ° with the mirror 5 ′.
[0016]
Further, at the bottom of the opening 3 and in front of the first reflecting plate 10, the reflecting surface 11a faces the reflecting surface 5a 'of the mirror 5' and the reflecting surface 10a side of the first reflecting plate 10. 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 '. It is supposed to be retained. In the case of this embodiment, the second reflecting plate 11 forms an angle of about 90 ° with the mirror 5 ′.
[0017]
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 irradiated from the display surface a of the display device 4, for example, the first reflection is performed while the irradiation direction of the display light is regulated by the optical path regulating unit 9. The light is transmitted through the plate 10 and reflected at right angles by the mirror 5 '. The reflected light reflected at right angles by the mirror 5 'is reflected toward the front of the vehicle by the first reflecting plate 10, and the reflected light reflected by the first reflecting plate 10 is further reflected by the first reflecting plate 10. The light is reflected again toward the mirror 5 ′ by the two reflectors 11. Then, the light reflected again by the mirror 5 ′ is directed toward the driver's eye point 6 by the mirror 5 ′, so that the display image of the display 4 displayed far from the eye point 6 is displayed. The virtual image 7 can be visually recognized by the mirror 5 portion.
[0018]
In this case, in the present embodiment, the display light from the display 4 is transmitted to the first reflecting plate using the first reflecting plate 10 and the second reflecting plate 11 disposed in a limited space of the display device. 10 is reflected by the mirror 5 ', then reflected by the first reflector 10 in the forward direction of the vehicle, and this reflected light is reflected again by the second reflector 11 to the mirror 5'. Since the display light is finally reflected by the mirror 5 'and reflected three times before going to the eye point 6, the optical path length of the display light is reduced. It can take a long time and can display a sufficiently long distance.
[0019]
That is, as shown in FIG. 2, the distance from the display surface 4a of the display 4 to the first reflector 10 is a, the distance from the first reflector 10 to the mirror 5 'is b, and the first reflector 10 to the first reflector. Assuming that the distance from the second reflector 11 is c and the distance from the second reflector 11 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 a + 2b + c + d. . On the other hand, if the arrangement position of the indicator 4 is not changed, the distance L ′ on the optical axis of the type that is simply reflected by the reflection member in front of the driver's seat is a + b. The virtual image 7 of the display image can be displayed far away by a distance corresponding to b + c + d as compared with the display.
[0020]
In the present embodiment, the display light transmitted from the display 4 through the first reflecting plate 10 is reflected at right angles by the reflecting surface 5a of the mirror 5 'and directed to the first reflecting plate 10. As a result, the optical axis of the display device 4 and the optical axis of the mirror 5 'coincide with each other. Accordingly, it is possible to minimize the width of the optical path of the display light that is transmitted through the first reflector 10 and reflected by the mirror 5 ', thereby reducing the width of the first reflector 10 to the minimum necessary. As a result, the entire display device can be made compact.
[0021]
Further, the display surface 4a of the display device 4 is arranged substantially parallel to the reflection surface 5a of the mirror 5 ', whereby the virtual image 7 of the display image is arranged perpendicular to the line of sight, A display image without distortion can be visually recognized.
[0022]
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 disposed in a limited space of the display device. Since it can be reflected three times before going to the eye point 6, the display 4 is placed deep inside the dashboard, that is, the optical path length of the display light is increased without increasing the size of the entire display device. Thus, it is possible to display far enough and improve the visibility by the driver.
[0023]
In the above-described embodiment, only one second reflecting plate 11 is disposed between the first reflecting plate 10 and the mirror 5 ′. If the reflected light is sequentially reflected by a plurality of second reflecting plates and finally reflected by the mirror 5 ', the number of times of reflection increases, and the optical path length can be made longer. it can.
[0024]
【The invention's effect】
As described above, according to the vehicular display device of the present invention, the display light from the display device is transmitted using the first reflector and the second reflector disposed in the limited space of the display device. After being reflected by the reflecting member in front of the driver's seat and reflected by the first reflecting plate, it 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 on the reflecting member. Reflected again and finally directed toward the driver's eyepoint, the optical path length of the display light can be made longer, and the display device can be displayed far enough while making the entire display device compact. The effect that the visibility by can be improved is exhibited.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an embodiment of a display device for a vehicle according to the present invention.
2 is a schematic configuration diagram enlarging the main part of FIG. 1; FIG.
FIG. 3 is a schematic configuration diagram showing a conventional vehicle display device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Dashboard 2 Windshield 3 Opening 4 Display 4a Display surface 5 'Mirror 6 Eye point 7 Virtual image 8 Hood part 9 Optical path control part 10 1st reflecting plate 11 2nd reflecting plate 12 Holding part

Claims (2)

A display device for displaying information is arranged on the dashboard portion of the vehicle, the display light from this display device is reflected by the reflective member in front of the driver's seat, and the virtual image of the display image of the display device is driven by the reflective member portion. In the vehicle display device that is visible from the seat,
The display device has a light transmitting property on the upper surface side of the display surface, transmits the display light from the display device, reflects the reflected light by the reflecting member, and reflects the reflected light in the forward direction of the vehicle. A reflector is disposed, and at least one second reflector that reflects the reflected light reflected by the first reflector to the reflector is disposed in front of the first reflector; An optical axis of display light transmitted from the display through the first reflecting plate coincides with an optical axis of the display light reflected by the reflection member after transmission, and the display unit includes the display unit. A display device for a vehicle , wherein the display light transmitted through the first reflection plate and the reflected light from the second reflection member are reflected at the same point . The display device for a vehicle according to claim 1, wherein a display surface of the display device is arranged in parallel with a reflection surface of the reflection member.

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