JPH061469Y2 - Vehicle display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention arranges a hologram panel in front of a display such as an instrument panel incorporated in a dashboard of a vehicle, and places the hologram panel in front of the hologram panel. The present invention relates to a vehicle display device which irradiates a reproduction light from a reproduction light source arranged on the display unit and overlaps the display on the display with the hologram reproduction image to perform stereoscopic display.

[Problems to be solved by conventional techniques and devices]

A device shown in FIG. 8 has been conventionally proposed as this type of device. In FIG. 1, a hologram panel 13 is arranged in front of a dashboard 12 installed in a dashboard 11 of a vehicle and provided on an instrument panel, and a hologram panel 13 is arranged inside the tip of a dashboard hood 14 with respect to the hologram panel 13. A hologram reproduction image is obtained by directly irradiating light from the reproduction light source device 15 installed on a steering column (not shown), and the hologram reproduction image and the display on the instrument panel 12 are displayed in a multiple manner to give the driver D a stereoscopic effect. It is designed to make it possible to visually recognize the instrument panel display.

The instrument panel 12 is configured as an electronic display device including a display device 12a including a fluorescent display tube, a light emitting diode indicator, a liquid crystal display and the like, and a drive circuit 12b thereof, and the display device 12a and the drive circuit 12b are the instrument panel case 12
It is stored in c. The hologram panel 13 arranged on the front surface of the instrument panel 12 is held at its peripheral edge by a front glass 12d fixed to the instrument panel 12.

9 (a) and 9 (b) are a front view and a side view, respectively, showing an example of the display B on the instrument panel 12 which is overlapped with the hologram reproduced image A. The display B on the instrument panel 12 is the vehicle speed B ₁ , It consists of engine speed B ₂ , remaining fuel amount B ₃ , and temperature B ₄ . As can be seen from FIG. 9 (b), the display on the instrument panel 12 is a stereoscopic display due to the relationship with the stereoscopic hologram reproduction image A formed behind the hologram panel 13.

In the above-described conventional display device, the display on the display 12 can give a stereoscopic effect due to the overlap with the hologram reproduced image, but since the hologram reproduced image is a still image, there is no relation with the display on the display. I couldn't give it meaning either.

Therefore, the present invention is directed to a vehicular display device in which a hologram reproduction image is moved according to a change in display of a display device and a specific relationship is provided between the display and the hologram reproduction image to further improve the display effect. Is intended to provide.

[Means for solving problems]

In order to achieve the above object, a vehicular display device according to the present invention has a hologram panel arranged in front of a display device such as an instrument panel incorporated in a dashboard of a vehicle, and the hologram panel is placed in front of the hologram panel. A display device for a vehicle, which irradiates reproduction light from a reproduction light source to overlap a display of a display device and a hologram reproduction image for three-dimensional display, is rotatably arranged in the dashboard. The display of the display is provided with a reflection plate that reflects the reproduction light from the reproduction light source and irradiates the front surface of the hologram panel, and a drive source that is disposed in the dashboard and rotationally drives the reflection plate. The drive source is operated in accordance with the change of the angle of change to change the angle of incidence of the reproduction light from the reproduction light source on the hologram panel to tilt the hologram reproduction image. It is characterized in that so as to vary the.

[Action]

In the above structure, a reflector for reflecting the reproduction light from the reproduction light source and irradiating the front surface of the hologram panel is rotatably arranged in the dashboard, and the reflection plate is arranged by the drive source arranged in the dashboard. The display is operated in accordance with a change in the display of the display, whereby the incident angle at which the reproduction light from the reproduction light source is incident on the hologram panel is changed.

Then, since the tilt angle of the hologram reproduced image is changed by the change of the incident angle of the reproduced light, the display area where the hologram reproduced image overlaps the display of the display is increased or decreased. That is, when the display on the display changes, the relationship between the display on the display and the hologram reproduced image also changes accordingly.

Further, since the incident angle can be efficiently changed at a rate twice as large as the rotation angle of the reflector, it can be realized without enlarging the space occupied by the constituent members such as the reflector in the dashboard.

〔Example〕

An embodiment of the display device according to the present invention will be described below with reference to the drawings, in which the same parts as those described above with reference to FIG. 8 are designated by the same reference numerals.

FIG. 1 is a side sectional view showing an embodiment of the present invention. In the figure, the rear side of a hologram panel 13 whose front side is held by a front glass 12d is an instrument panel front case 12.
The instrument panel front case 12e is held by the front glass 1 and the portion corresponding to the effective display area of the display device 12a is the front glass 1
In 2d, portions corresponding to the hologram effective display area of the hologram panel 13 are opened, and the other portions are printed with black matte or the like or painted. In addition, the hologram panel 13 is subjected to antireflection treatment such as a multilayer interference film in which two or more kinds of transparent materials having different refractive indexes are laminated in a certain thickness, and the driver's figure is reflected in the hologram panel 13. Is preventing.

On the other hand, the reproducing light source device 16 including the reproducing light source 16 a and the light source case 16 b is fixed by the stay 12 f protruding from the lower side surface of the instrument panel 12, and the instrument hood 14 is fixed.
Is arranged in the space S between the instrument panel 12 below and the steering column (not shown). Openings 16b 'and 14 are provided in the upper portion of the light source case 16b and the instrument panel hood 14, respectively.
a is opened, and the light from the reproduction light source 16a is emitted through these openings 16b 'and 14a. The light radiated through the opening 14a is a front surface mirror 2 provided in a gap G between the dashboard 11 and the instrument panel hood 14.
It is reflected by 0 and is irradiated on the hologram panel 13. For this reason, the instrument panel hood 14 is provided with an opening 14b for exposing the surface of the surface mirror 20. The surface mirror 20 is cantilevered by a rotating shaft 21a that is driven to rotate by a motor 21 installed in the gap G, and the rotation of the motor 21 causes the rotating shaft 21a to rotate around the rotating shaft 21a.
Is swung in the direction.

A pseudo point light source such as an incandescent lamp or a halogen lamp is used as the reproduction light source 16a. Then, the reproduction light source 1
In order to irradiate only the effective display area of the hologram panel 13 with the light emitted from 6a, the opening 16 of the light source case 16b is provided.
The shape of b ', the opening 14a of the instrument panel hood 14, the mask plate 14c attached to the opening 14a, or the surface mirror 20 is set. The mask plate 14c is formed of a metal plate having openings formed by etching or punching, an acrylic resin plate having openings formed by mask printing, or the like.

When the surface mirror 20 is swung by the rotation of the motor 21, the incident angle at which the light from the reproducing light source 16a reflected by the surface mirror 20 is incident on the hologram panel 13 is changed. 2 to 4 show the hologram panel 1.
The incident angle of the light from the reproduction light source 16a with respect to 3 is α ₁ ,
When α ₂ and α ₃ (α ₁ <α ₂ <α ₃ ) are changed, the inclination angles of the hologram reproduction image A with respect to the hologram panel 13 are γ ₁ , γ ₂ and γ ₃ (γ ₁ <γ ₂ <γ ₃ ). And changes. When the reproduced hologram image has a lattice pattern inclined with respect to the hologram panel 13 as shown in the figure, the area of the reproduced image increases as the incident angle of the light from the reproduction light source 16a increases.

Therefore, in FIG. 1, the vehicle speed is displayed on the display device 12a and the motor 21 is rotated according to the vehicle speed.
In addition, when the lattice pattern is recorded on the hologram panel 13, the surface mirror 20 is positioned at the position X indicated by the solid line when the vehicle speed is 0 km / h, so that the display image shown in FIG.
By positioning the front-surface mirror 20 at Y indicated by the dotted line when the vehicle speed increases, the display image shown in FIG. 5 (b) can be obtained.

The swing of the surface mirror 20 can be controlled by the system shown in FIG. In FIG. 6, the vehicle speed signal from the vehicle speed sensor 30 is converted into a voltage signal according to the angle of the surface mirror with respect to the vehicle speed in the processing circuit 31. This voltage signal is applied to one input of the servo circuit 32, where it is compared with a feedback voltage signal according to the actual angle of the surface mirror, and the motor 21 is rotated by the difference voltage between them,
Is transmitted to the surface mirror 20 via the transmission system 33 to swing the surface mirror 20. The angular position of the surface mirror 20 is detected by the mirror angle sensor 34, a voltage signal corresponding to the detected angle is fed back to the other input of the servo circuit 32, and the surface mirror 20 is driven to the angular position corresponding to the vehicle speed.

Next, recording and reproduction of hologram will be described. As shown in FIG. 7 (a), the hologram recording is performed by changing the laser light from the surface of the hologram photographic plate 13 'to the spherical reference light L _R.
And the subject illumination light L _I after the subject O. The object light L _O , which passes through the object O and enters from the back of the hologram photographic dry plate 13 ′, and the above-mentioned reference light L _R are superimposed on the hologram photographic dry plate 13 ′, and interference fringes are formed in the thickness direction of the hologram emulsion layer. It is recorded in layers. The object O is black matte screen-printed on the pick-up glass so that only the lines of the lattice pattern are transmitted.

Reproduction of the hologram is performed by irradiating the hologram panel 13 with the light L from the reproduction light source 16a from the same direction as the reference light L _R at the time of hologram recording, as shown in FIG. 7 (b). By the irradiation of the light L, only the light having a wavelength matching the black diffraction condition is intensified and reflected, and the hologram reproduced image A of the subject O becomes visible behind the hologram panel 13.

In the illustrated embodiment, the inclination angle of the hologram reproduction image is changed according to the change in vehicle speed, but another physical quantity is displayed on the display and the incident angle of the reproduction light is changed according to the change in the physical quantity. You may do it.

〔effect〕

As described above, according to the present invention, the tilt angle of the hologram reproduced image is changed by the change of the incident angle of the reproduced light to move the hologram reproduced image, and the hologram reproduced image overlaps the display of the display. Is increased or decreased, the relationship between the display on the display and the hologram reproduced image changes according to the change in the display on the display, and the display effect is further improved.

Further, since the incident angle of the reproduction light is changed by the rotation of the reflection plate, the incident angle is greatly changed by the slight rotation of the reflection plate, and the components such as the reflection plate are housed in the dashboard. It does not require a large space and is effective for downsizing the device.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of a display device according to the present invention, and FIGS. 2 to 4 are explanatory views showing changes in hologram reproduced image with respect to changes in incident angle of hologram reproduction light. 5 is an explanatory view showing a display example by the apparatus of FIG. 1, FIG. 6 is a block diagram showing a control system of the apparatus of FIG. 1, FIG. 7 is an explanatory view showing a recording and reproducing principle of a Lippmann hologram panel, FIG. 8 is a side sectional view showing an example of a conventional device, and FIG. 9 is an explanatory view showing a display example of the device of FIG. 11 ... Dashboard, 12 ... Instrument panel, 13 ... Hologram panel, 16a ... Reproducing light source, 20 ... Surface mirror (reflector), 21 ... Motor (driving source).

Claims (1)

[Scope of utility model registration request] 1. A hologram panel is arranged in front of a display such as an instrument panel incorporated in a vehicle dashboard,
In the vehicle display device, the hologram panel is irradiated with reproduction light from a reproduction light source from the front side to overlap the display on the display with the hologram reproduction image to perform stereoscopic display. A reflecting plate that is rotatably disposed inside and that reflects the reproduction light from the reproducing light source to irradiate the front surface of the hologram panel, and a drive source that is disposed inside the dashboard and that rotationally drives the reflecting plate. The drive source is operated in response to a change in the display of the display to change the incident angle at which the reproduction light from the reproduction light source is incident on the hologram panel to change the inclination angle of the hologram reproduction image. A display device for a vehicle, which is characterized in that