JPH01290386A - Video display device - Google Patents

Abstract

PURPOSE:To obtain horizontal visual field over 180 deg. and to facilitate the adjustment of a projector by employing a concaved mirror installed around a visual point, a front screen placed at its focal face and a reflecting mirror and the projector projecting its video image. CONSTITUTION:A video image projected from projectors 4a-4e is reflected in reflection mirrors 5a to 5e and projected on a front screen 3 having a horizontal visual field over 180 deg. placed at an upper oblique position with respect to a visual point 1 not giving any hindrance to the visual field. The video image on the front screen 3 is reflected and magnified by a concaved mirror 2 and made incident in the visual point 1 as a remote image. The horizontal visual field over 180 deg. is provided to the concaved mirror 2 similarly to the front screen 3 and the image is transmitted also to the rear face of the front screen 3, then the projector 4 is adjusted by the image of the front screen 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video display device with a simulated field of view display used in aircraft pilot training and the like.

[Summary of the invention]

In a device in which an image display unit such as a CRT or screen is installed near the focal plane of a concave mirror, and the image is magnified by the concave mirror and perceived as a distant image, the positional relationship between the image display unit, the concave mirror, and the viewpoint is based on the concave mirror. On the other hand, the image display section is set near the focal plane, the viewpoint is set in the direction in which the light from the image display section is reflected by the concave mirror, and at a position where the structure of the image display section does not become an obstacle.

Conventionally, a method is known in which a rear screen and a projector are combined as an image display section. In this method, images are projected onto the reflective surface of a concave mirror or from behind a screen. In this case, the rear screen becomes a part of a rotating body around the rotational symmetry axis of the concave mirror, but when increasing images in the horizontal direction, multiple projectors are installed.
When displaying 1800 or more, there were problems such as interference between the rear screen and the projector, and because the viewpoint and the projector were far apart, remote adjustment was required to adjust the image of the projector.

On the other hand, the invention uses a front screen and a projector as an image display unit, and the projector is installed near the top of the front screen, and the image is reflected by a reflecting mirror installed near the top of the concave mirror.

By projecting the image onto the front screen, it is possible to display a wide field of view of more than 1800 in the horizontal direction, and the image can also be checked from behind the front screen, making it easy to adjust the image of the projector. It is.

[Conventional technology]

FIG. 4 is a sectional view of the conventional system, and FIG. 5 is a plan view of the conventional system. A concave mirror 2 is installed in front of a viewpoint 1, a rear screen 9 is provided near the focal plane of the concave mirror 2, and an image is projected by a projector 4 from behind the rear screen 9. In addition.

An example close to this conventional example is 7, for example, 1303
You can raise it by 1. In this case, in order to obtain a horizontal field of view of 180° or more, it is necessary for the rear screen 9 and the concave mirror 2 to have dimensions of 180° or more with respect to their respective rotational symmetry axes 10. For example 9 to help you understand.

The projector 4a becomes an obstacle to the image of the projector 4b, and the shadow of the projector 4a appears on the image of the projector 4b. To eliminate this.

It is conceivable to install the projectors 4a to 4e inside the rotational symmetry axis 10. However, implementing this method requires a projector lens with an extremely short focal length, which has the drawback of increasing image distortion. It is also conceivable to install the projectors 4a to 4e above the rear screen 9 (indicated by broken lines in FIG. 4). This method is possible.The image on the screen 9 is the concave mirror 2.
After reflecting the image, the image is viewed near viewpoint 1, and image adjustment of the projectors 4a to 4e requires remote work or communication between two people. This is because the upper part of the projector 4, the upper part of the rear screen 9, and the upper part of the concave mirror 2 are covered with covers to prevent external light, so that the image on the rear screen 9 can only be viewed from one viewpoint.

[Invention or problem to be solved]

As described above, in the conventional technology, it is difficult to obtain a simulated field of view display device having a horizontal field of view of 180 degrees or more, and it is difficult to adjust the nine-color distortion of the image of the projector. On the other hand, in recent years, there has been a demand for a wider field of view in simulated field of view display devices for aircraft pilot training. In order to solve the above-mentioned problems, the present invention aims to widen the field of view by arranging multiple projectors so that they do not interfere with each other's images, obtain a horizontal field of view of 1800 degrees or more, and easily adjust the projectors while checking the image. [Means for Solving the Problem] FIG. 1 is a sectional view showing the basic configuration of the present invention.

1 is the viewpoint, 2 is the concave mirror, and 3 is the front screen.

4 is a projector, and 5 is a reflecting mirror. A concave mirror 2 is placed in front of and around a viewpoint 1. A front screen 73 is installed near the focal point of this concave mirror 2.

An image from a projector 4 is reflected on a reflecting mirror 5 and then projected onto a front screen 3. An image on a front screen 3 is reflected on a concave mirror 2 and viewed from a viewpoint 1. In such a configuration, as shown in FIG. 2, a concave mirror 2. Front screen 3. It is easy to install the projector 4 at an angle of 1800 degrees or more in the horizontal direction with respect to the viewpoint 1. Also,
It is easy for people to enter the back side of the front screen 3.

If you make the image visible from the back side of the front screen, you can also check the image from the back side of the front screen.

[Effect]

Image light from the projector 4 is reflected by a reflecting mirror 5 and projected onto the screen 3. This image is reflected and magnified by a concave mirror 2 and can be viewed from a viewpoint 1. still,
Even when the concave mirror 2 is widened (for example, 1800 or more and 3600 or less), the image light from multiple projectors is reflected by each reflecting mirror and projected onto the screen 3, and the image on each screen 3 is projected onto the concave mirror 2 in the horizontal direction. The light is reflected continuously, and a widened image can be seen at viewing a1.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

Fig. 1 is a sectional view showing the basic configuration of the present invention, Fig. 2 is a plan view of the present invention in a wide configuration, and Fig. 3 is an illustration of the present invention when installed on the cockbit of an actual flight simulator. It is a sectional view showing an example. 1 is a viewpoint, 2 is a concave mirror, 3 is a front screen, 4a to 4e are projectors, 5a to 5e are reflectors, 6 is a simulator cock bit, 7 is an adjustment table, and 8 is a cover. A front screen 3 is set near the focal plane of a concave mirror 2 installed in front of and around a viewpoint 1. Further, the front screen 3 is positioned so as not to obstruct the diagonally upward view of the viewpoint 1. Projector 4 to front screen 3
Images of a to 4θ are projected through reflecting mirrors 15a to 5θ.

The image on the front screen 3 is reflected and magnified by a concave mirror 2, and is made into a distant image. As shown in FIG. 2, the concave mirror 2 and the front screen 3 surround the viewing point 1. Normally, the image projection range of the projectors 4a to 4e is as follows.

It is limited by the projection lens of the projector, the distance to the screen, etc. Therefore, when a wide field of view in the horizontal direction is required, it can be obtained by arranging multiple projectors 4 to f''.The example in Figure 2 shows this.In this case, by increasing the number of projectors A horizontal field of view of 1,800 or more and 3,600 or less is also possible.In addition, if the image is transmitted to the back side of the front screen 3, the image can be seen from inside the front screen 3, so it can be installed at a close position to the front screen 3. The projectors 4a to 4e can be easily adjusted.The case where this is installed in an actual flight simulator will be explained with reference to FIG.
The view point 1 is naturally inside the cock bit 6. By installing an adjustment stand 7 inside the front screen 3, the projectors 4a to 4 can be adjusted on the adjustment stand 7.
It is possible to adjust e.

As shown in FIG. 2, viewpoint 1 can be set to 1/, fl, etc. within a range that allows video distortion.

This is because the front screen 3 is set near the focal plane of the concave mirror 2, so the image seen through the concave mirror 2 will be at infinity or far away, so the viewpoint 1 will move.

This is to avoid affecting the direction of the image.

〔Effect of the invention〕

According to the invention, it has a horizontal field of view of 1800 or more.

Moreover, it is possible to realize a video display device in which adjustment of nine projectors can be performed relatively easily.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of an image display device showing the basic configuration of the invention, and FIG. 2 is a plan view of the image display device of the invention. FIG. 3 is a sectional view showing an embodiment of the present invention, FIG. 4 is a sectional view of a conventional system, and FIG. 5 is a plan view of the conventional system. 1: Viewpoint, 2: Concave dyeing, 3: Front screen, 4a
~4e: Projector, 5a~5e: Reflector. Figure 2 'I-I Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. A concave mirror installed around the viewpoint, a front screen installed near the focal plane of the concave mirror and diagonally above the viewpoint, with the image projection surface facing the concave mirror, and an image projected onto the front screen. 1. An image display device comprising a projector and a reflecting mirror that projects images. 2. The video display device according to claim 1, which uses a front screen that allows the video to be viewed from the back side.