JPH10278629A - Head-up display device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange a holographic combiner(HC) at an appropriate position of an arbitrary driver by providing a drive part which is collapsible in the longitudinal direction on the holographic combiner, and integratedly and synchronously turning a light emitting and marking means with the holographic combiner. SOLUTION: The optical information to be projected from a light emitting and marking means 2 below a holographic combiner 1 is reflectively refracted toward a driver by the HC 1, and the marked virtual image of the optical information is visually recognized by the driver. A mechanism capable of integratedly and synchronously driving the HC 1 and the light emitting and marking means 2, is provided. The positional relationship of the HC 1 to the light emitting and marking means 2 is fixed, and the driver can constantly visually recognize the excellent marked virtual image free from any distortion by regulating the angle of inclination of the HC 1 even when the eye height of the driver is changed above/below the standard position, and the optimum marking position can be provided to an arbitrary driver, and the marked virtual image on instruments can be visually recognized without moving the eyes of the driver.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head-up display device for a vehicle in which a hologram optical element can be used to allow a vehicle driver to visually recognize an outside scene ahead and image information from a light-emitting display means inside the vehicle. Things.

[0002]

2. Description of the Related Art First, a head-up display (hereinafter referred to as a HUD) device superimposes a display virtual image of optical information of instruments radiated from a light-emitting display means on an external scene, so as to be in front of a driver. In addition, it has a function of displaying at a distance.

[0003] In other words, the HUD device displays the image at a distance, thereby eliminating the need for adjusting the focus of the eye between the outside world and the instrument. In addition, by displaying the information in front of the vehicle, the driver can visually recognize the instruments without moving the line of sight, and can accurately read the information of the instruments in a short time. This has the effect of preventing accidents and improving safety.

This HUD device includes, for example, a light-emitting display means such as a CRT, an image display section comprising an optical system such as a lens and a mirror, a half mirror provided on a windshield on the front of the driver for displaying the image information, and the like. It is composed of a combiner composed of a hologram or the like (combining the outside scene and the display).

[0005] When this device is used for a railway vehicle,
Because there is enough space to store the HUD device, for example,
There is no problem even with a considerably large image display unit as disclosed in Japanese Patent Application Laid-Open No. 4-110236.

On the other hand, when used for automobiles, HUD
Since the space for storing the device is limited, for example, "Co
mpact Holographic Head-up Display "(SPIE Vol.265
As shown in 2 pp. 341 to 344 1996), a HUD device which is designed in a compact form, is combined with an image display unit and a combiner, and is installed on a dashboard has been developed.

[0007] In particular, those using a reflection type volume hologram as a combiner can diffract optical information projected from the image display unit to form an image at an arbitrary position. Can be eliminated, and its size can be reduced. In addition, the reflection type volume hologram has a feature that a high-intensity display virtual image can be obtained without impairing the luminance of the external background due to the wavelength selectivity, and thus is effective as a combiner of the HUD device.

[0008] HUD installed on the dashboard of the vehicle
The device is shown schematically in FIG. That is, the HUD device 3
The optical information projected from the image display unit 31 of 0 is reflected by the combiner 32, and the driver 33 can recognize the display virtual image 34 of the optical information through the combiner 32. Here, reference numeral 35 denotes a dashboard.

In this HUD device, the position of the display virtual image 34 of the optical information differs depending on the height of the driver's 33 eyes. Therefore, the combiner 32 has a drive portion that can be tilted back and forth. An adjustment mechanism is provided so that the display virtual image 34 of the optical information is at an appropriate position.

However, when a vehicle is used by a plurality of persons having different body shapes, the HU is installed in order to adjust the driver's seat and the like so that the driver can easily drive according to the body shape.
It is not sufficient to simply adjust the inclination angle before and after the combiner of the D device, and it is difficult to display the optical information at an appropriate position that is easy for the driver to see.

Further, depending on the position of the driver, the HUD device is out of the displayable area of the optical information, and the display virtual image of the optical information cannot be visually recognized, or the display virtual image of the optical information having the distortion is visually recognized. This makes it difficult to read optical information instantaneously and accurately, and also causes a problem in safety.

Here, FIG. 4 is a conceptual diagram showing a distortion of a display virtual image formed by a holographic combiner at the position (height) of a driver's eyes in a conventional HUD device. This is optical information projected from the light emitting display means to the holographic combiner. When optical information projected from the light-emitting display means to the holographic combiner is diffracted by the holographic combiner, and the driver visually recognizes the displayed virtual image, (c) shows the position of the driver's eyes at the time of display. Is the standard position.
(B) is the case where the driver's eye position is above the standard position, (d) is the case where the driver's eyes are below the standard position,
(E) and (f) show the case where it is respectively left and right from the standard position.

For example, a position where a certain driver A can easily drive is determined, and a display virtual image visually recognized from the position of the eyes is shown in FIG.
The HUD device is installed so that However, driver A
The driver B with a higher eye position will visually recognize (b), and the driver C with a lower eye position than the driver A.
Will visually recognize (d). Further, the driver D whose driver seat position is before the driver A will see (e), and the driver E whose driver seat position is behind the driver A will see (f). become.

As described above, since the combiner is formed of a hologram, the display light from a specific direction is diffracted and emitted only in a specific direction.
An arbitrary driver cannot make an adjustment for visually recognizing the displayed virtual image of (c) shown in FIG.

[0015]

As described above, the HUD device superimposes optical information of instruments on an external scene,
In order to display the information in front of and at a distance from the driver and to enable the driver to accurately read the optical information in a short time, the HUD device should be arranged at an appropriate position with respect to the driver. Need to be

Therefore, the present invention has been made to solve the above problems, and it is difficult for a conventional HUD device installed on a dashboard to be appropriately adjusted according to an arbitrary driver. An object of the present invention is to provide a vehicle HUD device having a mechanism capable of disposing an installed HUD device at an appropriate position of an arbitrary driver, while having a disadvantage.

[0017]

In order to solve the above-mentioned problems, the present invention provides a light-emitting display means for displaying optical information, and diffracts the optical information projected from the light-emitting display means toward an observer. A holographic combiner, which is a vehicle head-up display device installed on the dashboard of the vehicle, wherein the holographic combiner has a drive portion that falls back and forth,
An object of the present invention is to provide a head-up display device for a vehicle, wherein the light-emitting display means and the holographic combiner rotate integrally and synchronously.

A vehicle head-up display device disposed on a dashboard of a vehicle has a driving portion that rotates left and right and can be fixed at an arbitrary angle.

A vehicle head-up display device arranged on a dashboard of a vehicle has a driving portion that moves left and right and can be fixed at an arbitrary position.

[0020] Further, the vehicle head-up display device disposed on the dashboard of the vehicle has a driving portion that moves back and forth, and can be fixed at an arbitrary position.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A head-up display device for a vehicle according to the present invention includes a light emitting display means for displaying optical information, and diffracts the optical information projected from the light emitting display means toward an observer. The holographic combiner is a device having a drive portion that falls back and forth, and the luminous display means and the holographic combiner are integrated, and can be moved synchronously, and at any position, It is possible to fix at an angle.

Hereinafter, embodiments will be described in more detail with reference to the drawings.

Here, the case where the vehicle HUD device of the present invention is mounted on a vehicle will be described. FIG. 2 is a conceptual diagram thereof. The luminous display means 2 is provided below the holographic combiner 1, and optical information projected from the luminous display means 2 is reflected and diffracted by the holographic combiner 1 toward the driver 10, and a display virtual image 11 of the optical information is provided. Are visually recognized by the driver 10. Here, reference numeral 12 denotes a windshield of the vehicle.

That is, the distance L1 is the distance between the holographic combiner 1 and the display virtual image 11, the distance L2 is the distance between the holographic combiner 1 and the light-emitting display means 2, and the distance L3 is the distance between the holographic combiner 1 and the driver 10. It is. The angle θ1 is a diffraction angle of the diffracted light diffracted by the holographic combiner 1 and visually recognized by the driver 10 from the center of the holographic combiner 1, and the angle θ2 is a distance from the center of the light-emitting display means 2 to the holographic combiner 1. This is the angle of incidence of the light ray toward the center.

FIG. 3 shows a holographic combiner 1.
1 is a conceptual diagram illustrating a recording optical system of a hologram 20 used as a hologram. The hologram 20 is created by two-beam interference from point light sources 21 and 22.

That is, when the optical information projected from the light emitting display means 2 to the holographic combiner 1 is diffracted by the holographic combiner 1 and the driver 10 visually recognizes the display virtual image 11, FIG. The condition that the display virtual image is displayed is that the distance between the holographic combiner 1 and the light-emitting display means 2 is L2, and the incident angle of the light beam from the center of the light-emitting display means 2 to the center of the holographic combiner 1 is θ2. It is to satisfy something.

FIG. 1 is a conceptual diagram of a vehicle HUD device according to the present invention. The HUD device for a vehicle according to the present invention is designed so that the holographic combiner 1
The light emitting display means 2 is provided with a mechanism that can be moved synchronously as a unit. Therefore, by fixing the positional relationship between the holographic combiner 1 and the light-emitting display means 2, even if the driver's eye height is higher or lower than the standard position, driving by adjusting the inclination angle of the holographic combiner 1 is achieved. The user can always visually recognize a good display virtual image without distortion.

Normally, the HUD device for a vehicle is installed so strongly that it can withstand vibration of the vehicle and severe conditions in the vehicle. Therefore, it is difficult to easily change the position of the conventional HUD device after installation. Met.

On the other hand, the vehicle HUD device of the present invention shown in FIG. 1 includes a rotary stage 5 and a linear stage 4 that can be moved in the X-axis 3 and Z-axis directions. Therefore, since the direction and position of the vehicle HUD device can be adjusted, it is possible to select a favorable display virtual image and an optimal display position of the display virtual image for an arbitrary driver.

[0030]

According to the vehicle HUD device of the present invention, the holographic combiner and the light-emitting display means are integrally and synchronously moved so as to always satisfy the optimum positional relationship between the holographic combiner and the light-emitting display means. The driver can always view a good display virtual image without distortion, and by moving the stage, a good display virtual image and an optimal display of the display virtual image can be displayed for any driver. Since the position can be provided, the effect of the original HUD device is that the driver can visually recognize the displayed virtual image of the instruments without moving the line of sight, and accurately read the information of the instruments in a short time. Therefore, an accident at the time of high-speed driving can be prevented, and the effect of improving safety can be more faithfully provided.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing one embodiment of a vehicular head-up display device according to the present invention.

FIG. 2 is a conceptual diagram showing a vehicle head-up display device according to the present invention mounted on a vehicle.

FIG. 3 is a conceptual diagram showing an optical system for creating a hologram used in a holographic combiner.

FIG. 4 is a conceptual diagram illustrating distortion of a display virtual image formed by a holographic combiner.

FIG. 5 is a configuration diagram of a conventional head-up display device for a vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Holographic combiner 2 ... Light emission display means 3 ... X-axis stage 4 ... Z-axis stage 5 ... Rotation stage 10, 33 ... Driver 11, 34 ... Display virtual image 12 ... Windshield 20 ... Hologram 21, 22 ... Point light source Reference Signs List 30 HUD device 31 Image display unit 32 Combiner 35 Dashboard

Claims (4)

[Claims] 1. A dashboard for a vehicle, comprising: a light-emitting display means for displaying optical information; and a holographic combiner for reflecting and diffracting the optical information projected from the light-emitting display means toward an observer. A vehicle head-up display device installed on the holographic combiner, wherein the holographic combiner has a drive portion that falls back and forth, and the luminous display means and the holographic combiner rotate integrally and synchronously. Characteristic head-up display device for vehicles. 2. The vehicle head-up display device disposed on the dashboard of the vehicle has a driving portion that rotates left and right, and can be fixed at an arbitrary angle. The head-up display device for a vehicle according to the above. 3. The vehicle head-up display device disposed on the dashboard of the vehicle has a drive portion that moves left and right and can be fixed at any position. The head-up display device for a vehicle according to the above. 4. The vehicle head-up display device disposed on a dashboard of the vehicle has a driving portion that moves back and forth, and can be fixed at an arbitrary position. Vehicle head-up display device.