JP2014038309A - Method and device for displaying spherical image - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a spherical image display device in which a light emitting source is arranged along an inner surface of a sphere or a part thereof while minimizing a gap between light emitting modules.
A sphere that circumscribes a regular icosahedron (i) in a spherical image display device in which a plurality of light emitting modules (10) constituted by a set of a plurality of light emitting elements (10) is tiled along the inner surface of a sphere or a part thereof Assuming (b), 20 spherical triangular regions c having circumscribed points as vertices are obtained, and by dividing each side of these triangles equally, a plurality of divided triangular regions e are obtained, and the divided triangular regions are obtained. The light emitting module 10 having a size and shape matching the above is tiled.
[Selection] Figure 1

Description

  The present invention relates to a spherical image display method and display device for displaying an image such as a moving image or a still image in a dome formed of a sphere or a part of the sphere, and particularly to an image of a type in which a light emitting source is arranged along a spherical surface inside the dome. The present invention relates to a display method and apparatus.

  When displaying images centered on images such as planetariums, astronomical, space, and earth videos, still images, academic videos, still images, entertainment images such as movies and still images, etc. Attempts have also been made to display in a dome of a dome-like video facility that is a part of the dome-like video facility.

  In the above, when displaying an image, a planetarium stellar sphere or means by projection from a projector is generally used (Patent Documents 1 to 3).

However, the prior art has the following problems.
(1) In the conventional technology, an image is displayed by projection, so a screen is provided on the inner surface of the dome. However, since the illuminance performance of the projector is limited, it is basically a non-directional white matte screen to ensure a high contrast ratio. Is used. Therefore, mutual reflection occurs in the dome due to the projected image, the entire dome is brightly illuminated, and the contrast ratio decreases as the projector illuminance increases. In recent dome image spaces, not only planetariums but also digital images using video projectors are often screened. However, it is common to use screens with a reflectivity of 45 to 60% because high image brightness is required. is there. Ideally, there is a method of making the screen reflectivity as low as possible, but the reality is that the projector illuminance cannot catch up, and the screen size, reflectivity, and projector illuminance are in a trade-off relationship. Also, when projecting a planetarium and digital video simultaneously, the planetarium's starry sky background would not become dark unless a high-contrast projector was used.

(2) In the prior art, a planetarium star sphere or projector for projecting an image has to be placed in the dome, which causes a problem in that the seating arrangement and the audience wires are limited.

  On the other hand, as means for displaying an image in the dome, in addition to the means by projection by the projector, it is also proposed to display the image by actively emitting light on the inner surface of the dome by laying a light emitting element on the inner surface of the dome. (Patent Documents 4 and 5).

  In the above case, the laying method is an important factor. In this regard, although it is a technique for displaying an image on the surface of a sphere, a well-known technique for tiling a light emitting module composed of a set of a plurality of light emitting elements. Application of (Patent Document 6), and a spherical image display device in which a rectangular light emitting module is tiled on the surface of a sphere is known (Non-Patent Documents 1 and 2).

  Non-Patent Document 1 discloses a technology in which 10,362 square organic EL small panels (light emitting modules) of 96 mm square are spread on an aluminum sphere to form a sphere display having a diameter of about 6 m.

Japanese Patent Application Laid-Open No. 59-172675 Japanese Patent No. 4538352 Japanese Patent No. 4355508 Japanese Patent Publication No. 6-42119 JP-A-5-27666 JP 2004-191487 A Announcement of delivery of Aurora Vision OLED for the National Museum of Emerging Science “Geo-Cosmos”, Internet search on 16 July 2012, URL (http://www.mitsubishielectric.co.jp/news/2011/pdf/0601.pdf ) Permanent exhibition at the National Museum of Emerging Science and Innovation, July 16, 2012 Internet search, URL (http://www.miraikan.jst.go.jp/sp/exhibition/geo-cosmos.html)

  The techniques described in Non-Patent Documents 1 and 2 are applicable when a light emitting module is laid along the inner surface of a sphere or a part thereof. However, when tiling light emitting modules, the spherical surface cannot be equally divided in a number of rectangular areas, and as shown in FIG. 11, between the light emitting modules M tiled on the inner surface of the sphere 100. Has a problem that a gap S is generated.

  In addition, as a result of being unable to divide the spherical surface equally into a number of rectangular areas, the regularity of the division is lacking. There was also a problem that was not possible.

  The spherical image display method of the present invention has been created in view of the above problems, and a plurality of light emitting modules constituted by a set of a plurality of light emitting elements are arranged along the inner surface of a sphere or a part thereof. When displaying an image in the inward direction of a sphere or a part thereof by ringing, assuming a sphere circumscribing the regular icosahedron, 20 spherical triangular regions whose vertices are the vertices are obtained, and these A plurality of divided triangular areas are obtained by equally dividing each side of the triangle, and the divided triangular areas are used as a unit of a triangular light emitting module to be tiled.

  Further, the spherical image display device of the present invention is configured such that a plurality of light emitting modules configured by a set of a plurality of light emitting elements are tiled along the inner surface of the sphere or a part thereof, thereby forming the sphere or a part thereof. In a spherical image display device that displays an image in an inward direction, assuming a sphere circumscribing a regular icosahedron, 20 spherical triangular regions whose vertices are vertices are obtained, and each side of these triangles is determined. A plurality of divided triangular areas are obtained by equally dividing, and the light emitting module having a size and shape matching the divided triangular areas is tiled.

  A dome-like video facility can be assumed as the sphere or a part thereof in the above spherical image display method and apparatus.

  Moreover, the light emitting module can assume what arranged many light emitting elements by LED or organic EL in the matrix form.

  FIG. 1 is a diagram for explaining the basic principle of the present invention. The present invention was created by focusing on the fact that a regular polyhedron having the largest number of faces in a three-dimensional space, that is, a regular polyhedron that is apparently closest to a sphere is a regular icosahedron, and its constituent faces are regular triangles.

  In FIG. 1, “a” is a regular icosahedron, and is composed of 20 surfaces of regular triangles that are constituent surfaces of the same size. If a sphere is circumscribed on a regular icosahedron a and the twelve points that are circumscribed are connected by sides composed of great circles (arcs), the region surrounded by the three sides constitutes a spherical triangle c, B is divided into 20 spherical triangles having the same size and shape. Side AB, side BC, and side CA of the spherical triangle C have the same dimensions. For example, if these three sides are divided into four, as shown in FIG. A spherical surface filled with fine divided triangle areas is created. Similarly, when divided into 5 divisions, 6 divisions, 7 divisions, 8 divisions, 9 divisions, 10 divisions, 11 divisions, 12 divisions, 13 divisions, 14 divisions, 15 divisions, 16 divisions, etc. , 500, 720, 980, 1280, 1620, 2000, 2420, 2820, 3880, 3920, 4500, 5120, and so on.

The total number X of spherical triangles formed when the spherical triangle of c is divided into n is X = 20n ²
Calculated by
FIG. 7 shows a spherical surface D filled with 320 divided triangular regions 320 divided into four, and FIG. 8 shows a spherical surface D filled with divided triangular regions 1280 divided into eight spherical triangles. Similarly, a spherical surface D filled with the divided triangular region 5120 plane obtained by dividing the spherical triangle into 16 parts is shown.

  The present invention is a unit of a triangular light emitting module that is tiled with the above-described divided triangular region e. Therefore, according to the present invention, it is possible to realize a spherical image display device in which the gap can be reduced as much as possible and the seam is not visible when viewing.

  In addition, since the spherical surface can be divided almost equally into a large number of divided triangular areas, it has regularity when divided and it is easy to set the tiling position and the tiling angle of the light emitting module when tiling the light emitting module. It also has the effect of being.

  On the other hand, the present invention is implemented in a dome-shaped video facility, and the audience inside the dome has images of astronomy / space / earth such as planetarium, images such as still images, images such as academic videos and still images, movies and still images When viewing an entertainment image such as a picture, the following effects are obtained.

(1) In the conventional technology that displays images on the inner surface of the dome by projection, the illuminance performance of the projector is limited, so basically a non-directional white matte screen was used to ensure a high contrast ratio. . Therefore, there is a problem that mutual reflection occurs in the dome due to the projected image, the entire dome is brightly illuminated, and the contrast ratio decreases as the projector illuminance increases. Since the LED module assumed in the present invention has been developed for image display outdoors, inevitably high brightness and high contrast are required, and its manufacturing technology has been established. The substrate surface of the LED chip has been devised to limit the reflection of external light as much as possible, and the technology can be applied. That is, when this is used inside the dome, the light from the opposing display part is mutually reflected inside the sphere, although the external light is blocked, and the reflected light illuminates the substrate surface, and the black level is slightly reduced. It is much smaller than the influence of light. Organic EL has a higher contrast ratio (1 million: 1 or more) and is designed for indoor use, so it is optimal as a device for displaying the inner surface of a sphere.

(2) Since the LED module has high brightness, it is especially effective when used in a huge dome.

(3) The light emitting module using LED or organic EL has a high response speed, so it is particularly effective when displaying moving images.

(4) In this invention, since the inner surface of the dome itself actively emits light and displays an image, there is no need to place equipment such as a planetarium or a projector inside or outside the dome, and the degree of freedom of space utilization is increased. Furthermore, since it is not affected by the intrusion of outside light, there is no restriction on the seat arrangement and the spectator's conductors, and it is possible to diversify the production means more than before, for example, by combining stage arrangements and lighting devices.

Explanatory drawing which shows the basic principle of this invention. The front view of the light emitting module used for this invention. The AA line partial enlarged view of FIG. The top view of the light emitting module used for this invention. Same as above, rear view. Same as above, right side view. The front view of the Example of the display apparatus of the spherical image of this invention. The front view of the Example from which the display apparatus of the spherical image of this invention differs. The front view of the Example from which the display apparatus of the spherical image of this invention differs. The perspective view of the Example which shows the usage method of the display apparatus of the spherical image of this invention. The fragmentary perspective view of the spherical image of a prior art.

  Embodiments of a spherical image display device according to the present invention will be described below with reference to the accompanying drawings. 1-6 is a figure which shows the light emitting module 1 used for this invention. The light emitting module 1 has a spherical image display device D completed by covering a plurality of sheets on the inner surface of a spherical substrate (not shown), that is, by tiling. 1 is formed in a triangular shape that matches the divided triangular region e in FIG.

  As described above, the light emitting module 1 is assumed to be a sphere circumscribing a regular icosahedron and obtains 20 spherical triangular regions whose vertices are circumscribed, and equally divides each side of these triangles. A plurality of divided triangle areas are obtained, and have a size and shape that match the divided triangle areas. Therefore, originally, the three sides must be arcuate, and the surface must also form a spherical surface. However, when the spherical triangle is divided into four, 16 divided triangle regions are obtained, and the spherical image display device is 320 planes, that is, 320 light emitting modules are laid. Therefore, if the diameter of the display device is 2.12 m, the dimension of each side of the light emitting module is 294 mm, and even if the three sides of the light emitting module are linear and the surface is flat, the display device appears to be a sphere. It can be expressed nearby. Incidentally, the numerical value of 2.12 m is a numerical value that is 1/6 million of the diameter of the earth when the spherical image display device is regarded as the earth.

  The above apparent phenomenon means that a common light emitting module can be used regardless of the size of the spherical image display device. For example, a display device having a diameter of 2.12 m is composed of 320 modules. If the same module is used as a unit of a divided triangle area obtained by dividing the spherical triangle C into eight parts, a sphere with a diameter of 4.25 m (1/3 million of the diameter of the earth) will be divided into 16 parts. If 5120 units are used as a unit of area, a sphere of 8.5 m (1 / 1.5 million of the earth diameter) can be formed.

  Reference numeral 10 in the drawing denotes a display element surface disposed on the front surface of the light emitting module 1. A large number of light emitting elements 11 such as LEDs and organic ELs are arranged in a matrix on the display element surface 1 as shown in the enlarged view of line AA in FIG. In the light emitting module 1 of this embodiment in which the dimension of each side is 294 mm, 2080 light emitting elements 11 are arranged.

  The light emitting module 1 is attached to the surface of a spherical base (not shown) with latch bolts 12 protruding from three locations on the back. In this case, the light emitting module 1 has a shape in which a triangular pyramid is cut parallel to the bottom surface.

  In the figure, reference numeral 13 is a power output connector provided on the back of the light emitting module, 14 is a power input connector, 15 is a signal output connector, 16 is a signal input connector, and 17 is a cooling inlet.

  FIG. 7 shows a display device D for a spherical image with a diameter of 2.12 m filled with the divided triangular region 320, using the light emitting module 1 as a unit of a divided triangular region obtained by dividing the spherical triangle C into four parts. Similarly, the light emitting module 1 is used as a unit of a divided triangle area obtained by dividing the spherical triangle C into eight, and a spherical image display device D having a diameter of 4.25 m filled with the divided triangle area 1280 is shown in FIG. The light emitting module 1 is used as a unit of a divided triangle area obtained by dividing a spherical triangle C into 16 parts, and is a view showing a display device D for a spherical image having a diameter of 8.5 m that is filled with the divided triangle area 5120 plane.

  As shown in FIG. 10, the spherical image display device D of the present invention having the above configuration is implemented on the inner surface of the dome 20 of, for example, a dome-shaped video facility.

1 Light emitting module A Regular icosahedron B Sphere circumscribing the icosahedron C Spherical triangular area E Divided triangular area

Claims (6)

When tiling a plurality of light emitting modules composed of a set of a plurality of light emitting elements along the inner surface of the sphere or a part thereof, a regular icosahedron is used when displaying an image inwardly of the sphere or a part thereof. Assuming a sphere circumscribing each other, 20 spherical triangular regions whose circumscribed points are vertices are obtained, and by dividing each side of these triangles equally, a plurality of divided triangular regions are obtained, and the divided triangles are obtained. A method for displaying a spherical image, characterized in that the unit is a unit of a triangular light emitting module tiled with a region. The spherical image display method according to claim 1, wherein the spherical body or a part thereof is a dome-shaped video facility. 3. The method for displaying a spherical image according to claim 1, wherein the light emitting module comprises a large number of light emitting elements of LED or organic EL arranged in a matrix. A spherical image display device that displays an image in an inward direction of a sphere or a part thereof by tiling a plurality of light-emitting modules constituted by a set of a plurality of light-emitting elements along an inner surface of the sphere or a part thereof. Assuming a sphere circumscribing a regular icosahedron, 20 spherical triangular regions each having a vertex at each circumscribed point are obtained, and by dividing each side of these triangles equally, a plurality of divided triangular regions are obtained. A spherical image display device characterized in that a light emitting module having a size and shape matching the divided triangular region is tiled. 2. The spherical image display device according to claim 1, wherein the spherical body or a part thereof is a dome-shaped video facility. 6. The spherical image display device according to claim 4 or 5, wherein the light emitting module comprises a large number of light emitting elements of LEDs or organic EL arranged in a matrix.

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