JPH068054U - Vehicle display - Google Patents

Abstract

(57) [Abstract] [Purpose] The display light of the display installed on the vehicle ceiling is reflected by the reflective member arranged on the dashboard surface, and the reflected light is reflected by the windshield to guide it to the driver's viewpoint. An object of the present invention is to provide a vehicle display device of a head-up display type which can reduce the size of an opening cover on a dashboard and can secure the degree of freedom in designing the device. [Structure] A display device 6 is arranged on a vehicle ceiling 5 with its display surface facing the dashboard 2 surface. A non-regular reflection hologram 10 is installed as a reflection member on the dashboard 2. The hologram 10 is installed so that the reflecting surface of the hologram 10 faces the display surface of the display 6 and also faces the windshield 1 of the vehicle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, the display image of a display for displaying vehicle information such as vehicle speed is once reflected by a reflecting member such as a reflector, and further reflected by a windshield in front of the driver's seat to guide it to the driver's point of view. The present invention relates to a so-called head-up display type vehicle display device in which a virtual image of a display image is visually recognized behind a shield.

[0002]

[Prior art]

 In general, a large number of vehicular display devices are used, in which the display image on the display is directly visible. In this system, a display for displaying vehicle information is arranged on the driver's side of the dashboard.However, a driver looking at the outside of the front of the vehicle needs to look at the display image on the display. There is the problem of having to move one by one. In particular, when traveling at high speed, there is a problem in that the eyes are moving a lot because they are looking at a distant view, and it is difficult to focus.

Therefore, the movement of the line of sight is reduced as much as possible, and the virtual image of the display image of the display is displayed in the distance behind the windshield (in front of the vehicle) so that the focus adjustment of the eyes is not required so much. The so-called head-up display device has been proposed and used.

An example thereof is shown in FIG. As shown in the figure, a display 6 for displaying driving information is arranged on the vehicle ceiling 5 with its display surface facing the front of the vehicle, and reflects the display light of the display 6 so that the dashboard 2 A concave mirror 7 is installed on the upper side with the concave reflecting surface facing the display 6. Therefore, the display light emitted from the display 6 is reflected by the concave mirror 7, and further reflected by the windshield 1 to be guided to the driver's viewpoint 4. From the viewpoint 4, the virtual image X of the display image is rearward of the windshield 1. It is designed to be viewed (in front of the vehicle) so as to overlap with the outside scene.

In this case, the shape (curvature) of the concave surface of the concave mirror 7 is set so that the display 6 is within the focus of the concave mirror 7, and the magnifying action of the concave mirror 7 causes the virtual image from the windshield 1. The distance D _{0 to} X is longer than the optical path (D ₁ + D ₂ ) from the windshield 1 to the display 6 through the concave mirror 7, and a sufficient distance display effect can be obtained. As the display device 6, a fluorescent display tube, an LED display element, a liquid crystal display element with a backlight, or the like is used. Although the concave mirror 7 is used as the reflecting member in the above example, a plane mirror may be used instead of the concave mirror 7. In that case, the distance D ₀ from the windshield 1 to the virtual image X is equal to the optical path (D ₁ + D ₂ ) from the windshield 1 to the display 6 via the concave mirror 7.

[0006]

[Problems to be solved by the device]

However, as described above, when the display unit 6 is arranged on the vehicle ceiling 5 and the reflecting member (concave mirror) 7 is placed on the dashboard 2, outside light such as sunlight reflected by the reflecting member 7 is not detected. In order to prevent the driver's viewpoint 4 from reaching, it is necessary to make the upper end of the reflecting member 7 invisible to the driver having the viewpoint 4 at the upper end of the eye range shown by the dotted line. Therefore, a large opening cover 2a having the same height as the line L ₁ connecting the upper end of the eyerange and the upper end of the reflecting member 7 is provided on the dashboard 2 surface on the driver side of the reflecting member 7 on the wall. Will have to be arranged.

Further, depending on vehicle conditions such as the position of the display unit 6, the inclination of the windshield 1, the shape of the upper surface of the dashboard 2, etc., the installation location of the reflection member 7 is limited, and there is almost no design freedom of the device. is there.

An object of the present invention is to provide a vehicular display device that can reduce the size of the opening cover on the dashboard and ensure the degree of freedom in designing the device.

[0009]

[Means for Solving the Problems]

 The present invention reflects the display light of the display installed on the vehicle ceiling by the reflecting member arranged on the dashboard surface, and further reflects the reflected light by the windshield to guide it to the driver's point of view. A vehicle display device for visually recognizing a virtual image of a display image is characterized in that the reflecting member is composed of a non-regular reflection hologram.

[0010]

[Action]

 Since the display device is configured as described above, when the power of the display is turned on, the display light emitted from the display image of the display is reflected by the non-regular reflection hologram installed on the dashboard surface. The reflected light is reflected by the windshield and guided to the driver's viewpoint. Therefore, from the driver's point of view, a virtual image of the display image on the display can be seen far behind the windshield (in front of the vehicle). In this case, since the non-regular reflection type hologram is used as the reflection member, by appropriately forming the entrance / reflection angle of the non-specular reflection type hologram, the installation position of the reflection member installed on the dashboard can be adjusted. It is possible to secure a large degree of freedom.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The same members as those described in the related art are designated by the same reference numerals.

FIG. 1 shows a vehicle display device which is an example of the present invention. As shown in the figure, a display device 6 for displaying driving information is arranged on the vehicle ceiling 5, and the display surface of the display device 6 is directed to the dashboard 2 surface. The non-regular reflection hologram 10 is installed as a reflection member. The reflection surface of the hologram 10 is directed toward the display surface side of the display 6 and is also installed so as to face the windshield 1 surface of the vehicle.

The non-regular reflection type hologram 10 is a reflection plate in which the incident angle of light incident on the hologram surface and the reflection angle of the light are different. In such a configuration, for example, when the reflection function is a plane mirror type, laser light is radiated to the hologram dry plate by the parallel light object light and the reference light when the hologram is formed, and the object light to the hologram dry plate is Recording is performed by changing the incident angles of the reference light and the reference light. Further, in the case of a concave mirror type having a magnifying function as a reflection function, the hologram dry plate is irradiated with laser light during hologram formation, divergent light is used as reference light, and parallel light is used as object light. As described above, by freely setting the incident angles of the object light and the reference light, it is possible to configure the completed hologram to have a desired entrance / reflection angle.

Therefore, by creating the non-regular reflection hologram 10 in consideration of the position of the display 6, the inclination angle of the windshield 1, the position and inclination of the dashboard 2, the driver's viewpoint 4, etc. It can be placed anywhere on board 2. Therefore, there is no need to change the shape of the dashboard 2 and to process it in order to mount the vehicle display device.

When the display light from the display 6 is applied to the hologram 10 arranged in this way, the light is reflected at a reflection angle different from the incident angle and enters the windshield 1, and the windshield 1 Is reflected by and is guided to the driver's viewpoint 4. From the viewpoint 4, the display image of the display 6 is visually recognized as a virtual image in the far rear of the windshield 1 (in front of the vehicle).

In order to prevent the driver from directly observing the hologram 10 as a measure against external light, a dashboard is provided with a wall having a line L ₂ drawn from the upper end of the driver's eye range to the tip of the hologram 10. It needs to be installed on two sides, but the cost is lower than the conventional opening cover.

[0017]

[Effect of device]

 As described above, according to the present invention, since the non-regular reflection type hologram is used as the reflecting member arranged on the dashboard, it is only necessary to appropriately form the entrance / reflection angle of the hologram so that the dashboard can be formed. It can be applied to any shape. For this reason, it is not necessary to change the shape of the dashboard 2 or to process it when mounting the vehicle display device, so that there is a great degree of freedom in designing the shape of the dashboard surface and the device. can get. Also, since the hologram can be installed at any angle, the size of the opening cover on the dashboard can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of a vehicle display device according to an embodiment of the present invention.

FIG. 2 is a side view of a conventional vehicle display device.

[Explanation of symbols]

 1 Windshield 2 Dashboard 4 Viewpoint 5 Vehicle ceiling 6 Display 10 Non-regular reflection hologram (reflection member)

Claims (1)

[Scope of utility model registration request] 1. The display light of an indicator installed on the vehicle ceiling is reflected by a reflecting member arranged on the dashboard surface,
Further, in a vehicle display device in which the reflected light is reflected by a windshield and guided to a driver's viewpoint, and a virtual image of a display image is visually recognized behind the windshield, the reflecting member is formed of a non-regular reflection hologram. Vehicle display device.