Dome Screen Facility

Abstract

To solve a problem regarding video image expression caused by lack of brightness and contrast of landscape depiction in a dome screen facility having a video image surface formed by video image projection.SOLUTION: A video image surface is divided into: a video image surface 1 which is formed by video image projection and belongs to a dome screen D ranging from the zenith to an arbitrary angle; and a video image surface 2 which is present below the video image surface 1 and formed by a video image display element.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a dome screen facility such as a planetarium facility. [Background technology]

[0002] 2. Description of the Related Art Planetarium facilities are well known in which light emitted from a projector is projected onto a dome screen to reproduce images of stars and their movements, which are then viewed by an audience inside the dome.

[0003] Conventional dome screens consist of a screen with a diffuse reflection surface for displaying projected images, onto which images are projected using a planetarium projector, slide projector, video projector, etc., and various effects are created by combining the images on the screen surface. For example, attempts have been made to depict natural scenery by using a planetarium projector to project a starry sky and a terrestrial landscape near the horizon using a video projector. Furthermore, horizontally installed dome screens are often configured with a projection angle exceeding a hemisphere to effectively depict landscapes and other images.

[0004] [Patent Document 1] Patent Publication No. 2000-066582 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] However, when projecting landscapes rather than star images in planetarium facilities, the brightness of the projection surface is insufficient to depict the landscape through the projected image, making it impossible to reproduce, for example, the sparkling lights of a city or the dazzling headlights of a car.

[0006] Of course, if a very bright projector is used, such bright spots can be reproduced beautifully, but due to limitations in the image contrast of the projector or the characteristics of the screen, which has a diffuse reflection surface, areas that should be displayed dark will appear gray, making it impossible to display a natural image with sufficient contrast.

[0007] The present invention was created in consideration of the above-mentioned problems of the prior art, and aims to solve the problems in image expression caused by insufficient brightness and contrast in depicting scenery. [Means for solving the problem]

[0008] That is, the dome screen facility is characterized in that the area from the zenith of the dome screen to an arbitrary angle is used as the image surface for video projection, and the screen area below that is used as the image surface for video display elements.

[0009] Furthermore, the invention described in claim 2 is characterized in that in the dome screen facility, the image display element is composed of a light-emitting element.

[0010] Furthermore, the invention described in claim 3 is characterized in that in the dome screen facility, the image display element is composed of a liquid crystal display element that is irradiated with light from a light source.

[0011] Furthermore, the invention described in claim 4 is characterized in that in the dome screen facility, the area of ​​the image surface formed by the image projection on the dome screen and the area of ​​the image surface formed by the image display element have different radii of curvature.

[0012] Furthermore, the invention described in claim 5 is characterized in that in the dome screen facility, the area of ​​the image surface by the image projection and the area of ​​the image surface by the image display element can be changed.

[0013] Furthermore, the invention described in claim 6 is characterized in that in the dome screen facility, the area of ​​the image surface formed by the image projection and the area of ​​the image surface formed by the image display element are changed depending on the orientation of the dome screen.

[0014] Furthermore, the invention described in claim 7 is characterized in that in the above-mentioned dome screen facility, a portion protruding from or recessed in the dome screen is used as an area for the image display element.

[0015] Furthermore, the invention described in claim 8 is characterized in that in the dome screen facility, the portion protruding from the dome screen is a shelf for installing an auxiliary projector. [Effects of the Invention]

[0016] According to the present invention, the image projection area covering the sky as a dome screen is an image surface with a diffuse reflection surface, and images from a planetarium projector and other projectors are synthesized on the screen surface to create a variety of effects, while scenery on the ground, etc., is projected with high brightness and contrast on the image area using an image display element, making it possible to depict natural scenery. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a front view of the dome screen facility of the present invention. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. BEST MODE FOR CARRYING OUT THE INVENTION

[0018] A specific embodiment of the dome screen facility of the present invention will be described below with reference to the accompanying drawings. Figure 1 shows a horizontal dome D placed parallel to the floor, with a certain angle on the dome surface serving as image surface 2 by the image display element, and the rest serving as image display surface 1 on the diffusing surface by image projection.

[0019] Regarding the shape of the area below the horizon on the image display surface 1, taking into account simulation factors, it should be spherical like a dome surface, but if it is necessary to expand the image display area by integrating the wall surface of the projection facility with the image display surface, it may be cylindrical as shown in Figure 2.

[0020] The image display element may be composed of a light emitting element such as an LED display element or an LCD display element, or may be composed of a liquid crystal display element that is irradiated with light from a light source.

[0021] The radius of curvature of the area of ​​the image surface formed by the image projection on the dome screen and the area of ​​the image surface formed by the image display element may be different, and the area of ​​the image surface formed by the image projection and the area of ​​the image surface formed by the image display element may be variable, and the area of ​​the image surface formed by the image projection and the area of ​​the image surface formed by the image display element may be changed depending on the orientation of the dome screen.

[0022] When the dome D is installed at an angle, the dome in FIG. 1 may be configured as is with the dome tilted, or only a portion of the front may be used as the image surface 2 by the image display element as shown in FIG.

[0023] Of course, the configuration may be as shown in FIG. 4, in which the wall surface connected to the dome shown in FIG. 2 is used as the image surface 2 by the image display element.

[0024] As shown in Figure 5, planetariums are provided with a small shelf S for installing lighting equipment and auxiliary projectors, and this shelf protrudes from the dome screen. However, by using the wall surface of this shelf as an image surface 2 using an image display element as shown in Figures 6 and 7, it is possible to reproduce a more natural landscape even in existing facilities.

[0025] Even if there is a recessed area in the dome screen, by using the image display element as the image surface 2, it is possible to reproduce a more natural landscape even in existing facilities.

[0026] Furthermore, by making it possible to freely change the height of the wall, it becomes possible to appropriately express scenes with tall buildings, etc. Of course, it is not necessary to change the wall as a whole, and it is also possible to make it possible to adjust the height of parts of the wall. [Explanation of symbols]

[0027] D Dome Screen S shelf 1. Image surface by video projection 2. Image surface by image display element

Claims

1. A dome screen facility in which the area from the zenith of the dome screen of a planetarium facility to an arbitrary angle is used as the image surface for video projection, and the screen area below that is used as the image surface for video display elements, and in which the area of ​​the surface onto which the image is projected varies depending on the orientation of the dome screen, and the area of ​​the surface on which the image is displayed by the video display elements is also varied.

2. 2. The dome screen facility according to claim 1, wherein the radius of curvature of the area of ​​the image surface formed by the image projection on the dome screen is different from the radius of curvature of the area of ​​the image surface formed by the image display element.

3. 3. The dome screen facility according to claim 1, wherein the dome screen is a planetarium facility, and the projecting or recessed portion of the dome screen is used as an area for the image display elements.

4. 4. The dome screen facility according to claim 3, wherein the portion protruding from the dome screen is a shelf for installing an auxiliary projector.

Images