JP6522378B2 - Dome screen projection facility - Google Patents

Description

  The present invention relates to a dome screen projection facility for projecting an image on the inner surface of a substantially hemispherical dome screen for viewing by an audience. More specifically, the present invention relates to a dome screen projection facility which can cope with both horizontal projection suitable mainly for astronomical content and inclined projection suitable mainly for non-astronomical content other than astronomical content.

  A planetarium is an example of a dome screen projection facility. In the planetarium, an image of Hoshino (seiya) is projected on the inner surface of the dome screen. Therefore, in the planetarium, it is required to reproduce the actual astronomical phenomena on the dome screen from the correct viewpoint. For such a demand, a horizontal dome centered on the zenith is suitable.

  On the other hand, in some cases, effects such as projecting general images such as computer graphics and live-action images on the entire sky may be implemented while using facilities of the planetarium. For such applications, a sloping dome is suitable, which is to be projected over a range extending partially below the horizon, centered at a position somewhat tilted from the zenith. That is because the audience is more immersive and immersive in the image. In addition, astronomical content may be screened on the sloped dome. As a planetarium using an inclined dome, there is a thing described in patent documents 1. The inclined type planetarium of Patent Document 1 is provided with a mechanism capable of inclining the horizontal surface on presentation to an arbitrary angle. Moreover, as a thing which can expect still higher immersive feeling, there exists a thing of the whole ball type described in patent document 2. FIG.

Japanese Patent Application Laid-Open No. 60-230183 Unexamined-Japanese-Patent No. 2006-267740

  However, the above-described conventional techniques have the following problems. Although the inclined dome is excellent in immersiveness and realism, there is a problem that the visual sense of the zenith direction and the position of the horizon does not coincide with the actual one. Therefore, it is disadvantageous for expressing astronomical phenomena. In addition, some of the inclined domes have a screen angle of view smaller than 180 °. Such an inclined dome has an advantage that the stellar projector can be disposed below the screen edge, and the stellar projector itself does not disturb the screen viewing from the viewpoint of the audience. However, on the other hand, since the screen does not form a complete hemisphere, there is a limitation in the expression of astronomical phenomena near the horizon. In order to clear this restriction, it is necessary to rotate the azimuth of the image, which is an unnatural aspect in representing astronomical phenomena. In addition, the dome of the global type has difficulty in setting up audience seats and the size of the total space required, and lacks widespread use.

  Also, the choice between the horizontal dome and the sloped dome is related to the frame structure of the building. For this reason, it is not easy to change the type of dome after making the facility once. From this, it was not easy to properly display either the contents suitable for horizontal domes (for learning etc.) and the contents suitable for inclined domes (entertainment etc.) in a dome screen projection facility.

  The present invention has been made to solve the problems of the above-described conventional techniques. That is to say, the problem is to provide a dome screen projection facility which can be operated as a horizontal dome and as an inclined dome, and has high practical spread.

  The dome screen projection facility according to one aspect of the present invention includes a spectator seat installed facing the front with one direction facing front, a dome screen located above the spectator seat and covering the audience seat, and a dome screen An interior of the facility has an image projection device for projecting an image to be viewed by the audience in the audience seat, wherein the dome screen extends from the screen edge on the front side to the audience seat to the screen edge on the rear side from the zenith While having an image area, the screen edge on the front side of the image area bites below the horizontal plane, and the screen angle of view from the screen edge on the front side of the image area to the screen edge on the back side through zenith is 180 ° Large, the image projection system projects from the front screen edge to the back screen edge. And has a projection range encompasses the entire area.

The image projection apparatus in the dome screen projection facility according to the above aspect further includes a horizontal projection mode in which an area centered on the zenith in the image area is projected and an area centered on a position inclined to the front side of the zenith in the image area. the that is configured to have an inclined projection mode with projection target.

  In the dome screen projection facility in the above aspect, by using the area including the screen edge on the front side in the image area for image projection, it is possible to give the spectators a higher sense of immersion and a sense of reality. This is the inclined projection mode. On the other hand, by using a range centered on the zenith in the video area for image projection, it is possible to perform rendering suitable for reproducing astronomical phenomena. This is the horizontal projection mode. One dome screen projection facility can cope with the proper use of such projection modes. In the present invention, the image projected on the dome screen may be either a still image or a moving image.

Furthermore, the image projection apparatus in the dome screen projection facility according to the above aspect is configured for the horizontal projection mode based on the identification given to the image content for the image content to which the distinction between the horizontal projection mode and the oblique projection mode is given in advance. In the case of the image content, the horizontal projection mode is selected, and in the case of the image content for the inclined projection mode, the inclined projection mode is selected to perform projection. Since this is done, the projection mode specified in advance in the image content is automatically selected and projection is performed, which is highly convenient. Of course, the image content may be still image content or moving image content.

  In addition, the image projection apparatus in the dome screen projection facility according to the above aspect receives, for each content of a series of image content groups, a scheduling that specifies in advance which projection mode is to be used: horizontal projection mode or inclined projection mode; It is also preferable that it is configured to perform the projection sequentially while selecting the projection mode according to the received scheduling. If this is the case, for each content of the series of image content groups, each image content is screened while the projection mode is switched according to the scheduling specified in advance. Therefore, the convenience is high.

Moreover, the image projection apparatus in the dome screen projection facility of the above aspect may be configured by a plurality of projectors having different projection ranges. In this case, it is desirable that the projection ranges of the plurality of projectors be uniformly changed depending on which of the horizontal projection mode and the inclined projection mode is used. As a result, the projection of various images using a plurality of projectors can be properly performed in any of the projection modes and when the projection mode is switched. In addition, a plurality of projectors in the case where the image projection apparatus is configured by a plurality of projectors with different projection ranges include a plurality of projectors provided in the periphery of the dome screen and higher than the spectator seat Is desirable. Furthermore, it is better if the one provided on the floor surface inside the dome screen and provided at the front side position from the audience seat is also included. Alternatively, it is also desirable to include those provided at the center of the floor surface inside the dome screen.

  According to this configuration, a dome screen projection facility is provided which can be operated as a horizontal dome and as a sloped dome, and has high practical spread.

It is a side sectional view of a dome screen projection facility concerning an embodiment. It is plane | planar sectional drawing of the dome screen projection installation of FIG. It is the figure which abbreviate | omitted the dome structure among what was shown in FIG. It is side sectional drawing which shows the projection condition in horizontal projection mode in the dome screen projection installation of FIG. It is side surface sectional drawing which shows the projection condition in the inclination projection mode in the dome screen projection installation of FIG. It is a block diagram which shows the structure of the control system of the dome screen projection installation of FIG. It is a flowchart of projection of the image of the dome screen projection installation of FIG. It is a figure which shows the example of scheduling of the projection mode about a series of image content groups. It is a plane sectional view of a dome screen projection facility concerning a form which has a center projector. It is side surface sectional drawing of the dome screen projection installation of FIG. It is side sectional drawing of the dome screen projection installation which concerns on the form which shifted the intersection of the screen edge to the front side from the center position. It is side surface sectional drawing (the 1) which shows the projection range in the inclination projection mode in the dome screen projection installation of FIG. It is side surface sectional drawing (the 2) which shows the projection range in the inclination projection mode in the dome screen projection facility of FIG. It is side sectional drawing of the dome screen projection installation which concerns on the form which shifted the intersection of the screen edge to the back side from the center position. It is side surface sectional drawing (the 1) which shows the projection range in the inclination projection mode in the dome screen projection facility of FIG. It is side surface sectional drawing (the 2) which shows the projection range in the inclination projection mode in the dome screen projection installation of FIG. FIG. 6 is a side cross-sectional view of a dome screen projection facility according to an embodiment having a flat dome screen. It is side sectional drawing of the dome screen projection facility which concerns on the form which shifted the intersection of the screen edge to the front side from the center position by the flat type dome screen. It is side surface sectional drawing of the dome screen projection facility which concerns on the form which shifted the intersection of the screen edge by the flat type dome screen from the center position to the back side.

  Hereinafter, a dome screen projection facility according to an embodiment of the present invention will be described in detail with reference to the attached drawings. 1 and 2 show cross-sectional views of the dome screen projection facility 1 according to the present embodiment. FIG. 1 is a side sectional view at a position A-A in FIG. FIG. 2 is a plan sectional view at the BB level in FIG.

  As seen in FIG. 1, the dome screen projection facility 1 of the present embodiment has a dome structure 10 and a dome screen 11 that is the inner surface thereof. A spectator seat 12 is disposed on a floor surface inside the dome structure 10 (hereinafter referred to as a dome chamber). The dome screen 11 is disposed above the spectator seat 12 so as to cover the spectator seat 12. Further, as shown in FIG. 2, in the dome screen projection facility 1 of this embodiment, the platform 13 is provided at one place on the floor surface, and the direction in which the platform 13 is located is the front. The opposite direction to the front is the back. The audience seat 12 is installed in the direction in which the audience sits in front of the audience.

  In addition, a console 14 is provided on the floor surface of the dome chamber. The console 14 is a device for the operator to operate the dome screen projection facility 1 in various ways. A dome gallery 15 is provided at a position slightly higher than the spectator seat 12 at the periphery of the dome structure 10. Although the dome gallery 15 is not a place where a spectator enters, projectors 16 are installed at a plurality of places. The projector 16 projects an image on the dome screen 11.

  In the configuration example of FIG. 1 and FIG. 2, five projectors 16 are arranged on the dome gallery 15. Furthermore, one projector 16 is installed on the platform 13. Thus, in the present configuration example, the image of the dome screen 11 is rendered by a total of six projectors 16. In this configuration example, a so-called center projector is not used. The number of projectors 16 is not limited to “6”. Also, the projector 16 is not necessarily required on the platform 13.

  Furthermore, a server room 17 is provided by attaching it to the outside of the dome structure 10. An image generation computer group 18 is installed in the server room 17. The image generation computer group 18 is a plurality of computers for generating image data of an image to be projected on the dome screen 11 in accordance with a command from the console 14. The image data generated by the image generation computer group 18 is distributed to each of the projectors 16 and provided for projection on the dome screen 11.

  The dome screen 11 in the present embodiment is roughly hemispherical. Further, in the internal space of the dome screen 11, a space used as a path of light projected by the projector 16 is referred to as a projection space S. And the edge of dome screen 11 is called screen edge. In the side sectional view of FIG. 1, the lower end of the dome screen 11 is the screen edges E1 and E2. The screen edge E1 is a portion on the front side of the dome screen 11 in the entire screen edge, and the screen edge E2 is a portion on the back side. In FIG. 1, the screen edge E1 coincides with the oblique line OD, and the screen edge E2 coincides with the horizontal line OC. The screen edges E1 and E2 of the actual dome screen 11 form a ring in which two semicircles are butt-shaped in a side view. Note that the butt points of the screen edges E1 and E2 may not necessarily be in the form of a broken line, but may be in the form of being connected by a smooth curve.

Hereinafter, the position of each key point on the dome screen 11 is defined as follows.
O (O) ... the central position T of the hemispherical shape of the dome ........... The intersection point (zenith) of the dome screen 11 with the vertical line drawn upward from the center O. F .......... with the dome screen 11 Crossing point C with the horizontal line from the center O toward the front side C .......... Crossing point D between the dome screen 11 and the horizontal line from the center O toward the back side D .... ... from the position F along the dome screen 11 Limit position

  The above position C is also the position of the rearmost end in the screen edge E2. The position D is also the position of the foremost end in the screen edge E1.

The dome screen 11 of the present embodiment will be further described with reference to FIG. In FIG. 3, the one shown in FIG. 1 is shown with the dome structure 10 omitted. The radius of the hemispherical shape of the dome screen 11 of this embodiment is represented by "R". In the dome screen 11 of this embodiment, all the following lengths are equal to the radius R (R = H = L1 = L2).
Height H ..... Length L1 between center O and zenith T ..... Length L2 between center O and position F ..... Distance between center O and position C

  The dome screen 11 has an image area extending from the rear side of the zenith T to the front side of the zenith T with respect to the audience seat 12. Furthermore, in the dome screen 11, the screen edge E1 on the front side bites below the horizontal line OF. The angle between the screen edge E1 and the horizontal line OF is hereinafter referred to as an angle ψ. On the other hand, the screen edge E2 on the back side coincides with the horizontal line OC. That is, the screen angle of view θ, which is the angle from the front side screen edge 11 through the zenith T to the rear side screen edge E2, is larger than 180 ° by the angle ψ. For this reason, the dome screen 11 has an image area larger than 2π in solid angle at a viewpoint from the center O. The angle ψ is a known value according to the specifications of the dome screen projection facility 1.

  The projection range by the total of six projectors 16 as described above covers the entire wide image area from the front screen edge E1 to the rear screen edge E2. Each of the projectors 16 has a part of the whole video area as its own projection area. The projection area is different for each projector 16.

  As a result, in the dome screen projection facility 1 of this embodiment, projection can be performed in two projection modes shown in FIGS. 4 and 5. FIG. 4 shows a projection mode in which the area G1 above the horizontal line OF and the horizontal line OC (screen edge E2) in the image area of the dome screen 11 is used for projection and the area K1 near the screen edge E1 below the horizontal line OF is not used. It is. This is called horizontal projection mode. In the horizontal projection mode, an area G1 centered on the zenith T is an image projection target. The horizontal projection mode is suitable for projecting an image that reproduces an actual starry sky. In addition, it is possible to project near the horizon in all four directions. Therefore, it is suitable for the image content of learning content of astronomy.

  FIG. 5 uses the region G2 above the oblique line OD (screen edge E1) and the oblique line OM in the image area of the dome screen 11 for projection, and uses the region K2 near the screen edge E1 below the oblique line OM There is no projection mode. The inclined line OM is a line obtained by extending the screen edge E1 (inclined line OD) to the back side. This projection mode is called inclined projection mode. In the inclined projection mode, an area G2 centered on the position Q inclined by an angle φ from the zenith T to the front side is an image projection target. The angle φ is equal to the angle 示 し shown in FIG. 3, that is, the excess (= θ−π) for the full screen angle of view θ of the dome screen 11 with respect to 180 °. In the oblique projection mode, compared to the horizontal projection mode, the spectator in the spectator seat 12 can be given a higher immersive feeling and reality for the projection image. For this reason, the inclined projection mode is suitable for image contents of entertainment contents such as real-shot images and computer graphics images.

  In both the horizontal projection mode of FIG. 4 and the inclined projection mode of FIG. 5, the angle of view of the projection areas G1 and G2 is 180 ° at the maximum. Further, the inclination angle φ of the inclined projection mode can be set to an angle smaller than the above-mentioned angle ψ. In that case, an area which is not used for projection is generated slightly above both of the screen edges E1 and E2. Alternatively, the tilt angle φ of the tilt projection mode can be made larger than the above-mentioned angle ψ. In that case, the angle of view of the projection area G2 is smaller than 180 °. Furthermore, it is also possible to have projection modes other than the above, such as a full screen mode in which the entire image area of the dome screen 11 is a projection area.

  A control system of the dome screen projection facility 1 of the present embodiment will be described. The control system of the dome screen projection facility 1 is configured as shown in the block diagram of FIG. The control system basically includes an operator console 14 in the dome room, an image generation computer group 18 in the server room 17, and a projector 16 such as the dome gallery 15.

  The console 14 has an operation input device 19, an operation control device 20, and an operation display device 21. The operation input device 19 is a device such as a keyboard, a ten key, a joystick, etc. for the operator to input various information. The operation control device 20 is a computer that performs necessary arithmetic processing for rendering of the dome screen projection facility 1 based on various information input to the operation input device 19. The operation display device 21 is a display screen attached to the operation control device 20. The operator confirms the image of the dome screen 11 at hand, or displays an image for assisting information input by the operation input device 19. The operation input device 19 and the operation display device 21 may be integrated.

  The image generation computer group 18 in the server room 17 is provided with a hub 22 and a plurality of image generation devices 23. Each image generation device 23 is a computer that generates image data. Each image generation device 23 is connected to the operation control device 20 of the console 14 via the hub 22. Each image generation device 23 is connected to one of the projectors 16 (including those on the platform 13) of the dome gallery 15 respectively. According to the above block configuration, each image generation device 23 generates an image based on the instruction of the operator at the console 14, and the image is projected from the projector 16 to the dome screen 11. . Thus, the projection of the image as shown in FIG. 4 or 5 is performed. Although the connection relationship between the image generation device 23 and the projector 16 is one to one in FIG. 6, this is not essential. Projected images of a plurality of projectors 16 may be generated by one image generating device 23.

  The projection of the image at the dome screen projection facility 1 is performed according to the control procedure shown in the flowchart of FIG. This flow is for projecting a certain image content on the dome screen 11. For the image content, it is assumed that the distinction as to whether to use the horizontal projection mode in FIG. 4 or the tilt projection mode in FIG. 5 is not specified in advance.

  In the flow of FIG. 7, first, the input of the inclination angle φ is received (S1). That is, the operator designates the angle φ in FIG. 5 by the operation input device 19. In order to use the horizontal projection mode of FIG. 4, the angle φ may be set to 0 °. Specifically, in S1, an image prompting the operator of the input operation of the angle φ is displayed on the operation display device 21.

  Then, the operator actually inputs the value of the angle φ into the operation input device 19 (S2). Normally, the angle φ may be specified according to the type of image content to be projected. That is, when projecting a starry sky, 0 ° may be input as the angle φ. Thus, the horizontal projection mode is selected. On the other hand, when it is intended to project an all-sky image such as entertainment, a positive value may be input as the angle φ. Thus, the inclined projection mode is selected. The value of the angle φ may be the same as the angle 通常, as described above, but is not limited thereto.

  Then, according to the input value in S2, the drawing operation is performed (S3). That is, drawing data of the image content is converted according to the value of the designated angle φ. This calculation is performed by each of the image generation devices 23 shown in FIG. Therefore, the value of the angle φ input in S2 is provided to each image generation device 23 from the operation control device 20. This operation generates drawing data according to the projection mode. Therefore, the projection area of each projector 16 may be shifted by this calculation. For example, it is assumed that the slanted projection mode is specified in S2 on the assumption that there is an image content originally created on the premise of horizontal projection although it is an entertainment content. Then, the projection position of the image is shifted toward the front side by the angle φ. The calculations associated with this are respectively performed by the respective image generation devices 23, so that the projection areas of the respective projectors 16 are uniformly shifted by the angle φ.

  The calculation result is transferred to the graphic board in each image generation device 23 (S4). The drawing data is then output to the projector 16 connected to each image generation device 23. Each projector 16 receives this and performs projection to the dome screen 11. Thus, the projection shown in FIG. 4 or 5 is performed on the image content.

At the beginning of the description of this flow, it has been stated that the image content to which the designation of which projection mode to use is not made in advance is targeted. However, the present invention is not limited to this, and image content in which a projection mode to be used is specified in advance can also be targeted. In that case, it is configured to automatically follow the projection mode designated for the image content . However, without the function, the projection mode specified Thus, the operator in step S2 can be also enter an angle phi. If the value of angle φ in the oblique projection mode is not specified, the same value as angle 指定 may be input. It is also practically possible for the operator to input the angle φ at his own discretion regardless of the designated projection mode.

When using automatic follow function specified projection mode in images content, the information related to the specification in the image content is input to the operation control unit 20, the input of the operation controller 20 in step S2 The processing following S3 will be executed assuming that it has been done. The operation control device 20 can also be configured to automatically select the projection mode according to the type of the image content (a difference in genre such as astronomy, entertainment, advertisement, public information, etc.). For example, when information on the type of image content is input to the operation control device 20, the horizontal projection mode is entered for the astronomical genre, the tilt projection mode is entered for the genre other than the astronomical genre, and the operation control device 20. Is automatically specified.

  Furthermore, it is possible to schedule in advance the projection mode to be used for a series of image content groups to be shown continuously. That is, before starting a series of screenings, projection modes to be used for individual image contents are designated in advance. FIG. 8 shows an example of scheduling for that purpose. The display order table of such contents is displayed on the operation display device 21, and the type of projection mode or the value of the angle φ is input to the operator in the “mode” column. Although the "mode" field is blank in FIG. 8, the screen may be started after completing the entry in this field. Of course, in this case as well, specification of a unique projection mode may be made in advance for each image content, or automatic specification of a projection mode based on "genre" may be performed.

  Then, each content is screened in order from the top according to the "number" in the table of FIG. Then, the flow of FIG. 7 is automatically carried out at the start of each content, and at S 2 at that time, the contents input as described above are automatically set in the “mode” column in the table of FIG. . As a result, the projection mode is automatically selected according to the progress of the screening, and the image content is sequentially projected.

  Here, a modification of the facility configuration of this embodiment will be described. First, a variation of the projector group will be described. FIGS. 9 and 10 show a configuration example having the center projector 24. FIG. FIG. 9 is a plan sectional view (corresponding to FIG. 2), and FIG. 10 is a side sectional view (corresponding to FIG. 3). In the configurations of FIGS. 9 and 10, the center projector 24 is disposed substantially at the center of the floor of the dome chamber. The projectors 16 other than the center projector 24 are only one on the dome gallery 15. A configuration having the center projector 24 and the plurality of projectors 16 is also possible.

  The center projector 24 performs projection using a starboard and a fisheye lens, and is particularly suitable for projection of star images. 9 and 10, the projection in the horizontal projection mode and the inclined projection mode can be performed by using both the center projector 24 and the projector 16, or either the center projector 24 or the projector 16 can be used. It can also be done using only one. When the center projector 24 also participates in the projection in the inclined projection mode, the projection position of the image by the center projector 24 is also shifted in accordance with the shift of the projection area of the projector 16.

  In place of the center projector 24, one or many projectors similar to the projector 16 may be installed at the position of the center projector 24. On the other hand, a configuration is also possible in which all projection is performed only by the center projector 24. In addition to the central projector 24 as a star projector and the general projector 16, a planetary projector can be added. In that case, the star projector, the planetary projector, and the projector 16 all follow the shift of the projection position due to the switching of the projection mode described above. Alternatively, here, it may be possible to set whether or not to follow the shift of the projection position for each of the projectors individually.

  Next, a modified example of how to cut the screen edges E1 and E2 in the dome screen 11 will be described. In the configuration example shown in FIGS. 1 to 3, the intersection of the screen edges E1 and E2 coincides with the center position O on the side view of FIG. 3 (the same as FIG. 1). For this reason, the length L1 and the length L2 are equal (L1 = L2). The same applies to the configuration examples shown in FIG. 9 and FIG.

  On the other hand, as shown in FIG. 11, the intersection position of the screen edges E1 and E2 can be shifted from the center position O. FIG. 11 is a side cross-sectional view corresponding to FIG. In the configuration example shown in FIG. 11, the intersection position X of the screen edges E1 and E2 is shifted from the center position O toward the front. As a result, the length L1 is shorter than the length L2 (L1 <H <L2). Also in the dome screen projection facility 26 using such a dome screen 25, both the horizontal projection mode and the inclined projection mode as described above are possible.

  Furthermore, in the dome screen projection facility 26 of FIG. 11, two methods, one shown in FIG. 12 and one shown in FIG. 13, are available as the inclined projection mode. In the inclined projection mode of FIG. 12, the lower end of the projection range P is a screen edge E1 and a straight line extending it to the back side. On the other hand, in the inclined projection mode of FIG. 13, the lower end of the projection range P is a straight line connecting the position D and the center position O. However, on the front side of the center position O, a small portion below the screen edges E1 and E2 is missing. The inclined projection mode shown in FIG. 13 is substantially the same as the inclined projection mode shown in FIG. 5 except for a slight omission of the projection range P. In the oblique projection mode of FIG. 12, the projection range P is reduced slightly as a whole, as compared to the oblique projection mode of FIG. 13. Further, the angle corresponding to the angle shown as the angle φ in FIG. 5 is slightly larger than in the case of FIG.

  Also, conversely, as shown in FIG. 14, the dome screen 27 may be formed such that the intersection point position X of the screen edges E1 and E2 is shifted to the back side. In the configuration example shown in FIG. 14, the length L1 is longer than the length L2 (L1> H> L2). Also in the dome screen projection facility 28 using such a dome screen 27, both the horizontal projection mode and the inclined projection mode as described above are possible.

  Also in the dome screen projection facility 28 of FIG. 14, two inclined projection modes are possible. In the inclined projection mode of FIG. 15, the lower end of the projection range P is a screen edge E1 and a straight line extending it to the back side. On the other hand, in the inclined projection mode of FIG. 16, the lower end of the projection range P is a straight line connecting the position D and the center position O. The tilt projection mode of FIG. 16 is substantially the same as the tilt projection mode shown in FIG. In the oblique projection mode of FIG. 15, the projection range P is slightly expanded as a whole, as compared with the oblique projection mode of FIG. Further, the angle corresponding to the angle shown as the angle φ in FIG. 5 is slightly smaller than in the case of FIG.

  Furthermore, in any of FIGS. 3, 10, 11 and 14, the shape of the portion of dome screens 11, 25 and 27 below the straight line FOC in the drawing, ie, the portion below the horizontal line, is from the horizontal line It does not have to be an extended spherical surface in the upper part. The portion may have, for example, a cylindrical surface shape of radius R centered on the vertical line OT. Specifically, for example, the wall surface of the dome chamber can be used as the cylindrical surface portion. In that case, the relevant part of the wall surface of the dome chamber is considered to be part of the dome screen. Further, the lower end of the portion is regarded as the screen edge E1.

  Then, the modification about the shape itself of dome screen 11 is described. In all of the configuration examples shown so far, the shape of the dome screen is basically hemispherical. That is, the height H in FIGS. 3, 10, 11, and 14 is equal to the radius R of the dome screen.

  On the other hand, as shown in FIG. 17, a flat dome screen 29 can be used. The dome screen projection facility 30 of FIG. 17 has the following differences with respect to those using a hemispherical dome screen by using the flat dome screen 29. That is, in the dome screen projection facility 30, the height H is smaller than the radius R of the spherical shape of the dome screen 29 (H <R). The height H in the dome screen projection facility 30 in FIG. 17 is defined as the distance between the center position O and the zenith T. The center position O is not the spherical center of the dome screen 29 in the dome screen projection facility 30, but is vertically above it, and the height of the horizon level in the horizontal projection mode (the screen edge E2 is that level) The position of

  Also in the dome screen projection facility 30 of FIG. 17, the screen edge E1 on the front side of the dome screen 29 bites in below the horizontal line OF. On the other hand, the screen edge E2 on the back side coincides with the horizontal line OC. Thus, the screen angle of view θ is larger than 180 °. This point is in common with the embodiment shown in FIG. Therefore, even in the dome screen projection facility 30 of FIG. 17, the horizontal projection mode corresponding to FIG. 4 and the inclined projection mode corresponding to FIG. 5 are possible.

By using the flat dome screen 29 as described above, there is an advantage that the overall height of the facility can be suppressed. This is because the height H is relatively small as described above. Therefore, it is relatively easy to secure the installation space. In the dome screen projection facility 30 shown in FIG. 17, the intersection point X between the screen edges E1 and E2 coincides with the center position O in FIG. Therefore, in the configuration example using the above-mentioned hemispherical dome screen, it is common to those shown in FIG. 1 and FIG. Further, the length L1 and the length L2 are equal (L1 = L2). Further, the magnitude relationship between the radius R and the height H is as follows.
H <L1, L2 <R

Even in the case of a flat dome screen, the above-described modifications can be made as to how to cut the screen edges E1 and E2. FIG. 18 shows a dome screen projection facility 32 using a dome screen 31 in which the intersection position X of the screen edges E1 and E2 is shifted from the center position O toward the front. Such a dome screen projection facility 32 is also capable of horizontal projection mode and inclined projection mode. In particular, as to the inclined projection mode, there are two ways as described in FIG. 12 and FIG. In the dome screen projection facility 32 of FIG. 18, as described in FIG. 11, the length L1 is shorter than the length L2 (L1 <L2). Further, the magnitude relationship between the radius R and the height H is as follows.
H <(L1 + L2) / 2 <R

  FIG. 19 shows a dome screen projection facility 34 using a dome screen 33 in which the intersection position X of the screen edges E1 and E2 is shifted from the center position O toward the rear surface. Such a dome screen projection facility 34 is also capable of horizontal projection mode and inclined projection mode. In particular, with regard to the inclined projection mode, there are two ways as described in FIG. 15 and FIG. In the dome screen projection facility 34 of FIG. 19, as described in FIG. 14, the length L1 is longer than the length L2 (L1> L2). Furthermore, the magnitude relationship between the radius R and the height H is the same as in the case of FIG. 18 described above.

  Even in the case of the configuration examples of FIGS. 17 to 19, as to the portions below the horizontal line of the dome screens 29, 31 and 33, the spherical shape of the portion above the horizontal line is extended as described above. Is not limited. It is of course possible to use the wall surface of the dome chamber itself as the dome screen of that portion. Also, with regard to installation of the projectors in any of the configuration examples of FIGS. 11 to 19, the configuration shown in FIGS. 1 to 3 does not have the center projector 24 and has a plurality of projectors 16; It is possible to use both the configuration using the center projector 24 and the projector 16 in combination as shown in FIG. Moreover, the dome structure 10 is abbreviate | omitted and shown in any of FIGS. 10-19.

  As described above in detail, according to the present embodiment, the screen edge E1 on the front side of the dome screen 11 which is basically hemispherical is bitten below the horizontal line OF. On the other hand, the screen edge E2 on the back side is made to coincide with the horizontal line OC. Thereby, a screen angle of view θ larger than 180 ° is secured. In this way, one dome screen projection facility 1 can selectively use the horizontal projection mode and the inclined projection mode. Furthermore, by utilizing this, it is possible to select which projection mode to use, to set automatically, or to schedule, according to the contents of the image content to be projected. As a result, in one dome screen projection facility 1, it is possible to properly use properly the projection that is faithful to the actual astronomical phenomenon and the projection that is excellent in the sense of immersion and the sense of reality. Thus, an excellent versatile dome screen projection facility 1 is realized. Furthermore, the same effect is realized also in various modifications of how to cut the screen edges E1 and E2 and the shape of the dome screen.

  The present embodiment is merely an example and does not limit the present invention. Therefore, the present invention is naturally capable of various improvements and modifications without departing from the scope of the invention. For example, the number and arrangement of the projectors 16 are arbitrary. The same applies to the audience seat 12. The console 14 is not limited to the dome room, but may be provided outside the dome, for example, in the server room 17. Also, the server room 17 itself may be provided under the floor or the like.

1, 26 28, 28, 30, 32, 34 dome screen projection facility 11, 25, 27, 29, 31, 33 dome screen 12 spectator seat 14 console 16 projector 18 image generation computer 19 operation input device 20 operation control device 21 Display for operation 23 Image generation device 24 Center projector E1 Screen edge E2 Screen edge T Zenith θ screen angle of view

Claims (5)

A spectator seat installed towards the front with one direction front,
A dome screen disposed above the spectator seat, covering the spectator seat,
A dome screen projection facility having an image projection device for projecting an image to be viewed by an audience of the audience seat on an inner surface of the dome screen;
The dome screen is
And an image area extending from the screen edge on the front side of the zenith to the screen edge on the rear side of the zenith with respect to the audience seat,
The screen edge on the front side of the image area bites below the horizontal plane,
The screen angle of view from the screen edge on the front side of the image area through the zenith to the screen edge on the back side is greater than 180 °,
The image projection device
The front der those having within the projection area encompasses the entirety of the image area from the side of the screen edges leading to the screen edge of the rear side Rutotomoni,
The projector has a horizontal projection mode in which an area centered on the zenith in the image area is projected, and an inclined projection mode in which an area centered on a position inclined to the front side with respect to the zenith in the image area is projected. ,
Based on the distinction assigned to the image content, regarding the image content to which the distinction between the horizontal projection mode and the oblique projection mode is given in advance ,
If the image content is for horizontal projection mode, select the horizontal projection mode,
A dome screen projection facility characterized by being configured to perform projection by selecting the inclined projection mode if it is image content for the inclined projection mode. The dome screen projection facility according to claim 1, wherein the image projection device is
It consists of multiple projectors with different projection ranges,
Depending on which projection mode is used, the horizontal projection mode and the inclined projection mode,
A dome screen projection facility characterized in that the projection ranges of the plurality of projectors are changed in unison. The dome screen projection facility according to claim 2, wherein the plurality of projectors constituting the image projection apparatus are:
A dome screen projection facility characterized by comprising a plurality of things provided on the periphery of the dome screen and higher than the spectator seat. The dome screen projection facility according to claim 3, wherein the plurality of projectors constituting the image projection apparatus are:
What is provided is a dome screen projection facility on a floor surface inside the dome screen, which is provided at a position on the front side as viewed from the audience seat. A dome screen projection facility according to any one of claims 2 to 4,
In the plurality of projectors constituting the image projector,
A dome screen projection facility, comprising one provided at a central position of a floor surface inside the dome screen.

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