JP6549837B2 - Video projection system - Google Patents

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an image projection system for projecting an image from a projection device such as a projector onto a screen.

  Various techniques have been proposed as video projection systems for projecting an image from a projection apparatus such as a projector onto a screen.

  For example, in the technology described in Patent Document 1, projectors (projectors) respectively corresponding to a plurality of screens arranged in an overlapping manner are provided, and images are projected from the respective projectors to the respective screens from the same direction. It has been proposed to display stereoscopic images.

Patent No. 4849091 gazette

  However, in the technique described in Patent Document 1, since the image is projected from the same direction on all the screens, a projection device that projects the image on the rearmost or foremost screen is disposed outside the plurality of screens. The need for placement requires a large space for the entire device and there is room for improvement.

  The present invention has been made in consideration of the above-mentioned facts, and it is an object of the present invention to enable space saving of an image projection system provided with a plurality of screens and a plurality of projection devices.

In order to achieve the above object, the invention according to claim 1 comprises a first screen having transparency, and a reflective second screen provided on the back side opposite to the viewing surface of the first screen; A first projection device provided between the first screen and the second screen for directly projecting an image from the back side of the first screen to the first screen; the first screen and the first projection A position between the device or a distance between the first screen and the second screen and a distance from the first screen is provided at the same distance as the first projection device, and the observation of the second screen is performed. And D. a second projection device that projects an image directly to the surface side which is a surface.

  According to the first aspect of the present invention, the first screen is transmissive, and the second screen is provided on the back side opposite to the viewing surface of the first screen. That is, the second screen can be observed through the first screen.

Then, the first projection device is provided between the first screen and the second screen, and projects an image directly from the back side of the first screen to the first screen, and the second projection device is the first screen and the first screen. A position between the first projection device and a position between the first screen and the second screen, and a distance from the first screen at the same distance as the first projection device, Project the image directly to the front side.

  That is, since the first projection device and the second projection device are provided between the first screen and the second screen, space can be saved more than when one is provided outside the screens.

  Further, a first projection device is provided between the screens, and a position between the first screen and the first projection device, or a distance between the first screen and the second screen and the first screen is a first projection. By providing the second projection device at the same distance as the device, it is possible to save space as compared with the case where the second projection device is provided at another position.

  According to the second aspect of the present invention, there is provided an image mode for projecting an image and an illumination mode for projecting and illuminating light, and in the case of the image mode, the first screen and the second screen. Mode control means for controlling the first projection device and the second projection device to project a predetermined image to at least one and project illumination light to at least one of the first screen and the second screen in the illumination mode May be further included. This eliminates the need for illumination and enables various controls.

  Further, as in the invention according to claim 3, a plurality of sets of a first screen, a second screen, a first projection device, and a second projection device are provided, and different images are projected on each screen for each set. Thus, projection control means may be further included to control each set of the first and second projection devices. Thus, one set is provided by providing a plurality of sets of the first screen, the second screen, the first projection device, and the second projection device, and controlling different images for each set to be projected on each screen. The distance between the screens can be shortened even in the case of projecting an image, and space saving can be achieved.

  Further, as in the invention according to the fourth aspect, the first projection device is provided with a human detection means for detecting a human, and based on the detection result of the human detection means, to project light to a region where the human exists. The light control unit may further include light control means for controlling at least one of the second projection device and the second projection device, and as in the invention according to claim 5, a person detection means for detecting a person is provided. It may further include light tracking control means for controlling at least one of the first projection device and the second projection device so as to project light based on movement of a person.

  Further, as in the invention according to claim 6, setting means for setting a wake-up time, and a first projection device and a second projection device for projecting an image or light at the wake-up time set by the setting means. It may further include alarm control means for controlling at least one of them.

  According to the seventh aspect of the present invention, the photographing device for photographing the sky is provided, and at least one of the first projection device and the second projection device is controlled to project the sky image photographed by the photographing device. May further include sky image control means.

  Further, as in the invention according to claim 8, the receiving means for receiving the earthquake early warning is provided, and the earthquake information is projected to one of the first screen or the second screen when the earthquake early warning is received by the receiving means. And seismic control means for controlling the first projection device and the second projection device to intermittently project light onto the other of the first screen or the second screen. In this case, the earthquake control means further comprises an emergency power supply as in the invention according to claim 9, and the first projection device and the projection device project at least one of the evacuation information and the television program after the arrival of the earthquake wave. The second projection device may be further controlled.

Furthermore, according to the present invention, as in the invention according to claim 10, the second screen is provided on the ceiling of the room, one end of the first screen is fixed to the ceiling, and the other end is fixed to the wall of the room it may be so that provided obliquely so as to approach the ceiling disposed, and a first projection device and a second projector to the wall between the first screen and the second screen with distance.

  As described above, according to the present invention, space saving of an image projection system provided with a plurality of screens and a plurality of projection devices can be achieved.

FIG. 1 is a perspective view showing a schematic configuration of a video projection system according to an embodiment of the present invention. (A) is a look down view which looked at the room in which the imaging | video projection system concerning embodiment of this invention was arrange | positioned from the ceiling side, (B) is the look up view which looked at the ceiling from lower side. FIG. 1 is a block diagram showing a configuration of a video projection system according to an embodiment of the present invention. It is a figure which shows an example of the projection content projected on a ceiling by the imaging | video projection system which concerns on embodiment of this invention. It is a flowchart which shows an example of the flow of the process performed with the control apparatus of the imaging | video projection system which concerns on embodiment of this invention.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a schematic configuration of a video projection system according to an embodiment of the present invention.

  As shown in FIG. 1, the video projection system 10 includes an upper ceiling screen 12 and a lower ceiling screen 14.

  The upper ceiling screen 12 has a characteristic to diffuse and reflect almost all the incident light, and a general screen for projecting the image of the projection device 16 is disposed on the ceiling of the room.

  The lower ceiling screen 14 has a characteristic of diffusing only a part of the incident light, and is a transmissive screen having a process capable of projecting an image on a transparent member such as glass or resin. Provided on the lower side of the That is, the upper ceiling screen 12 is located on the back side opposite to the observation surface of the lower ceiling screen 14.

  In the present embodiment, as shown in FIG. 1, one end of the lower ceiling screen 14 is fixed to the beam portion H of the ceiling of the central portion of the room, and the other end is fixed to the wall surface. The lower ceiling screen 14 is inclined to be closer to the ceiling as it gets away from the wall. That is, the lower ceiling screen 14 is arranged to be inclined such that the wall side of the room is lower than the center. By tilting the lower ceiling screen 14 in this manner, the height of the ceiling can be secured.

  Then, a projection device (upper ceiling projection device 16A and lower ceiling projection device 16B) 16 for projecting an image on each of the upper ceiling screen 12 and the lower ceiling screen 14 is a wall surface between the upper ceiling screen 12 and the lower ceiling screen 14 Is located in By arranging the projection device 16 in the closed space between the screens in this manner, the projection device 16 and its wiring can be concealed, and operation noise and exhaust heat can be isolated from the living space.

  Each projection device 16 is preferably of an ultrashort projection type provided with a reflector to be provided between the upper ceiling screen 12 and the lower ceiling screen 14.

  The positional relationship between the upper ceiling projection device 16A and the lower ceiling projection device 16B is such that the lower ceiling projection device 16B is disposed between the screens and the position between the lower ceiling screen 14 and the lower ceiling projection device 16B or The upper ceiling projection device 16A is disposed between the ceiling screen 14 and the upper ceiling screen 12 at a distance from the lower ceiling screen 14 that is the same distance as the lower ceiling projection device 16B.

  More specifically, in the present embodiment, the upper ceiling projection device 16A and the lower ceiling projection device 16B are disposed side by side in the horizontal direction as shown in FIGS. The positions are the same or are partially overlapped. FIG. 1 shows an example in which the upper ceiling projection device 16A and the lower ceiling projection device 16B are disposed in a position in which a part of the position in the vertical direction overlaps. This enables space saving in the vertical direction. The upper ceiling projection device 16A and the lower ceiling projection device 16B may be arranged to be aligned along the vertical direction. For example, the lower ceiling projection device 16B may be arranged along the vertical direction, and the lower ceiling projection device 16B may be disposed on the ceiling side, and the upper ceiling projection device 16A may be disposed on the lower side of the lower ceiling projection device 16B.

  Further, in the present embodiment, four sets of the upper ceiling screen 12, the lower ceiling screen 14, the upper ceiling projection device 16A, and the lower ceiling projection device 16B are provided in one room as shown in FIG. ing. That is, the distance between the screens can be shorter than in the case of projecting an image onto the entire ceiling in one set, and space saving can be achieved. In the present embodiment, although four sets are provided as described above, two sets are shown in FIG. Moreover, FIG. 2 (A) is the looking down view which looked at the room in which the imaging | video projection system 10 which concerns on embodiment of this invention was arrange | positioned from the ceiling side, and FIG. 2 (B) looked at the ceiling from lower side. It is a look up view.

  Each of the upper ceiling projection device 16A and the lower ceiling projection device 16B is controlled by the control device 20. A sky camera 18 is connected to the control device 20 so that the projection device 16 can project sky images taken by the sky camera 18.

  Subsequently, the detailed configuration of the video projection system according to the embodiment of the present invention will be described. FIG. 3 is a block diagram showing the configuration of the video projection system 10 according to the embodiment of the present invention.

  As shown in FIG. 3, the video projection system 10 includes a control device 20, and the control device 20 controls a plurality of projection devices 16 to control an image projected onto a plurality of screens. In the present embodiment, the video projection system 10 has an illumination mode and a video mode, and the illumination mode and the video mode are realized by the control of the projection device 16 by the control device 20. In the present embodiment, eight projectors (four upper ceiling projectors 16A and four lower ceiling projectors 16B) 16 are provided, but in FIG. 3, four projectors corresponding to FIG. Only the two upper ceiling projection devices 16A and the two lower ceiling projection devices 16B are shown.

  The control device 20 includes a communication unit 22, an image storage unit 24, an image control unit 26, a setting storage unit 28, an overall control unit 30, and a power supply unit 32, and the overall control unit 30 comprehensively controls the image projection system 10. Controlled by

  The communication unit 22 is connected to the earthquake early warning server 34 via a network such as the Internet, receives earthquake information from the earthquake early warning server 34 when an earthquake occurs, and outputs the reception result to the overall control unit 30. Do. In addition, the communication unit 22 may acquire an image to be projected on each screen from the projection device 16 from an external server or the like other than the earthquake early warning server 34.

  The image storage unit 24 stores various images to be projected from the projection device 16 to each screen. The video to be stored may be acquired from the communication unit 22 or may be acquired from various media.

  A plurality of projection devices 16 are connected to the image control unit 26, and by controlling the respective projection devices 16, projection of an image onto each screen and projection of illumination light are performed. In the video mode, the video control unit 26 projects, for example, a video or the like stored in the video storage unit 24 on each screen. At this time, three-dimensional display becomes possible by displaying on the upper ceiling screen 12 and the lower ceiling screen 14 respectively. Further, in the case of the illumination mode, the image control unit 26 can function as indirect illumination by projecting illumination light from the upper ceiling projection device 16A to the upper ceiling screen 12. On the other hand, by projecting illumination light from the lower ceiling projection device 16B to the lower ceiling screen 14, it can function as direct illumination. And by controlling the area which the projection apparatus 16 projects, spot-like illumination becomes possible.

  An input / setting unit 36 is connected to the setting storage unit 28. The input / setting unit 36 functions as an operation unit for performing various settings of the video projection system, and the setting storage unit 28 stores various settings of the video projection system 10 set by the input / setting unit 36. .

  As an example of the various settings stored in the setting storage unit 28, an alarm time and the like can be input and stored by the input / setting unit 36. For example, when the alarm time is stored in the setting storage unit 28, the overall control unit 30 monitors the alarm time, and controls each projection device 16 through the video control unit 26 when the alarm time is reached. By doing so, the room is controlled to be bright by the image and light. Alternatively, the video control unit 26 is controlled via the video control unit 26 so that the room gradually brightens from a predetermined time before the wake-up time, and the video control unit is illuminated at maximum brightness when the wake-up time is reached. Each projector 16 may be controlled via 26. Further, an area on which light or video is projected by such a wake-up process may be set in advance and stored in the setting storage unit 28 so that only the corresponding area is controlled to be bright.

  The power supply unit 32 supplies power from a commercial power supply (not shown) to each unit that needs the power of the control device 20. Further, the emergency power supply 33 is connected to the power supply unit 32, and when power supply to the respective units of the control device 20 becomes impossible due to a power failure or the like, the power of the emergency power supply 33 is It is possible to supply each of the projection devices 16 and the like. In addition, it is possible to apply various batteries as the power supply 33 for emergency.

  Further, the general control unit 30 is connected with a human sensor 38 for detecting presence / absence of a person in each room and movement of the person, and also connected with a sky camera 18 for photographing the sky. Thereby, the overall control unit 30 can project the illumination light to the area where the person exists or move the illumination light following the movement of the person using the detection result of the human sensor 38. It is assumed. In addition, it is possible to display the photographing result of the sky camera 18 on each screen or to store it in the video storage unit 24.

  When the photographing result of the sky camera 18 is projected, the photographing result may be projected as it is from at least one of the upper ceiling screen 12 and the lower ceiling screen 14 from each of the projection devices 16. For example, the sky area and the cloud area are separated by image processing, and an image of the sky area is projected from the upper ceiling projection device 16A onto the upper ceiling screen 12, and the cloud from the lower ceiling projection device 16B By controlling each of the projection devices 16 via the image control unit 26 so as to project the image of the region of (4) onto the lower ceiling screen 14, it is possible to project a more stereoscopic image.

  Subsequently, an example of the projection content projected onto the ceiling by the video projection system 10 according to the embodiment of the present invention configured as described above will be described. FIG. 4 is a diagram showing an example of the projection content projected onto the ceiling by the video projection system 10 according to the embodiment of the present invention.

  FIG. 4A shows an example in which half of the room is illuminated in the illumination mode. It is possible to brighten the half of the room by controlling the respective projection devices 16 so as to project the illumination light onto the upper half area of FIG. 4 (A). At this time, the light is projected from the upper ceiling projection device 16A to the upper ceiling screen 12 to function as indirect illumination, and the illumination light is projected from the lower ceiling projection device 16B to the lower ceiling screen 14 for direct illumination. It can be done. In the case of direct illumination, depending on the projection angle from the lower ceiling projection device 16B to the lower ceiling screen 14, the illumination light is not irradiated to the area directly below the lower ceiling screen 14, but to an adjacent area It is also possible to emit illumination light. For example, in the example of FIG. 4A, the lower ceiling projection device 16B on the opposite side of the room (the lower side of FIG. 4A) emits illumination light to the lower ceiling screen 14 as shown in FIG. 4A. It may be in the state of

  FIG. 4B shows, for example, an example in which the presence of a person is detected by the human sensor 38, and only the detected area is illuminated. As the illumination method, indirect illumination (projecting light from the upper ceiling projection device 16A to the upper ceiling screen 12) or direct illumination (projecting light from the lower ceiling projection device 16B to the lower ceiling screen 14) may be used. Good. Regarding the correspondence between the position of the person and the illumination position, by storing the positional relationship between the illumination area and the image projected from the projection device 16 in advance in the setting storage unit 28 or the like, the light corresponding to the position of the person is Can be irradiated.

  FIGS. 4C and 4D show examples of projecting a sky image captured by the sky camera 18. The image of the sky may be projected in real time by the photographing result of the sky camera 18, or may be selected by operation of the input / setting unit 36 or the like from among those stored in advance in the image storage unit 24 and projected. You may For example, FIG. 4C shows an example of a daytime sky image and FIG. 4D shows an example of an evening sky image. Here, when the result of the current projection in real time in the daytime is projected, the present day sky image as shown in FIG. 4C is projected, and the sky image stored in the image storage unit 24 is projected (delay In the case of time), an evening sky image as shown in FIG. 4D, which has been photographed in advance by the sky camera 18 in the evening and stored in the image storage unit 24, is projected.

  In the case where the photographing result of the sky camera 18 is projected, as described above, in the present embodiment, the set of the upper ceiling screen 12, the lower ceiling screen 14, the upper ceiling projection device 16A, and the lower ceiling projection device 16B. For example, the divided image may be projected onto at least one of the upper ceiling screen and the lower ceiling screen 14 of four sets. As a result, divided images are projected from the respective projection devices 16 and synthesized on the ceiling. As described above, since it is possible to project the shooting result of the sky camera 18, it is possible to make the room feel as wide as if the ceiling is transparent. In addition, since a realistic image is projected, it also becomes possible to visually confirm and prepare rain such as guerrilla heavy rain and lightning.

  FIG. 4E shows an example in which earthquake information is projected. In this case, when the communication unit 22 receives the earthquake early warning from the earthquake early warning server 34, the general control unit 30 controls the projection devices 16 via the video control unit 26, and receives the emergency earthquake received Project earthquake information (for example, seismic wave arrival time, expected maximum seismic intensity, etc.) included in the flash report. For example, the image control unit 26 controls the upper ceiling projection device 16A to project the earthquake information acquired by the communication unit 22 on the upper ceiling screen 12 (in FIG. , And the lower ceiling projection device 16B may be controlled to project light onto the lower ceiling screen 14 to transmit an emergency by blinking the light or the like. Alternatively, the projected contents of the upper ceiling screen 12 and the lower ceiling screen 14 may be reversed.

  FIG. 4F shows an example of contents to be projected after arrival of the seismic wave. The example of FIG. 4F shows an example in which each television channel and evacuation light are projected. By projecting various media information such as television after arrival of seismic waves, it becomes possible to collect information such as earthquake damage.

  Subsequently, specific processing performed by the control device 20 of the video projection system 10 according to the embodiment of the present invention configured as described above will be described. FIG. 5 is a flow chart showing an example of the flow of processing performed by the control device 20 of the video projection system 10 according to the embodiment of the present invention. The process of FIG. 5 starts, for example, when the control device 20 is powered on.

  First, in step 100, the overall control unit 30 acquires input / setting content from the setting storage unit 28, and proceeds to step 102. For example, the input / setting unit 36 acquires information such as whether or not there is a setting for alarm processing.

  In step 102, the overall control unit 30 determines whether or not there is a mode instruction. Specifically, it is determined whether or not the instruction for the video mode or the illumination mode is instructed by the operation of the input / setting unit 36, and when the determination is affirmed, the process proceeds to step 104, and it is denied. In the case, the process proceeds to step 106.

  In step 104, the overall control unit 30 controls the respective units to execute the instructed mode (in the present embodiment, the video mode or the illumination mode), and the process shifts to step 106.

  For example, when executing the video mode, the overall control unit 30 may project each projection device 16 via the video control unit 26 so as to project the designated video or the sky video shot by the sky camera 18. Control. In the case of projecting the imaging result of the sky camera 18, an image as shown in FIG. 4C and FIG. 4D is projected. The projection screen (upper ceiling screen 12 or lower ceiling screen 14) may project an image on both sides, or may project an image on only one of them.

  On the other hand, when the illumination mode is performed, the overall control unit 30 controls each of the projection devices 16 so as to project the illumination light onto the designated part. In the present embodiment, if the illumination light is projected on the upper ceiling screen 12 by the upper ceiling projection device 16A, it becomes indirect illumination, and if the illumination light is projected on the lower ceiling screen 14 by the lower ceiling projection device 16B, it becomes direct illumination . Then, for example, as shown in FIG. 4A, each projection device 16 may be controlled to illuminate a half of the room in the illumination mode, or as shown in FIG. The illumination light may be projected only on the position of the person detected by the sensor 38. Note that whether to illuminate using the detection result of the human sensor 38 may be selectable by the operation of the input / setting unit 36. Also,

  In step 106, the overall control unit 30 determines whether or not there is a wakeup setting. That is, the overall control unit 30 determines whether or not the alarm processing is set in the setting storage unit 28. If the determination is affirmed, the process proceeds to step 108. If the determination is denied, the process proceeds to step 110. Transition to

  In step 108, the overall control unit 30 determines whether or not the wake-up time has come. If the determination is negative, the process proceeds to step 112, and if the determination is affirmative, the process proceeds to step 110.

  At step 110, the overall control unit 30 controls the respective projection devices 16 via the video control unit 26 to execute the alarm process and shifts to step 112.

  As an example of the alarm process, as described above, when the alarm time comes, the overall control unit 30 controls the respective projection devices 16 via the image control unit 26, and the room is brightened by the image or light. Control each projection device 16 through the image control unit 26 so that the room gradually brightens from a predetermined time before the alarm time, and the maximum luminance can be obtained at the alarm time. The projectors 16 may be controlled via the video control unit 26 so as to illuminate. In this way, it is possible to wake up more comfortably and naturally with images and lights that are gradually brightened rather than by sound awakening, which is closer to nature. In addition, it is possible to wake up only a specific person rather than a sound alarm.

  When the area where the alarm processing is performed is stored in advance in the setting storage unit 28, control may be performed so that only the corresponding area is brightened.

  In addition, when the alarm process is performed, only light may be projected on the screen, or a predetermined video pattern may be projected. As a video pattern, the imaging result of the sky camera 18 may be projected. In this case, when the actual sky at the alarm start time is dark, the sky image may be projected by photographing in advance and stored in the image storage unit 24. In addition, when there is a person sleeping at night, the portion of the image close to the person sleeping may lower the brightness and control the projection device 16 to suppress the leakage of the brightness. Good.

  In addition, as another image pattern, the image (for example, the leaves and clouds of a tree) of a person close to the person (lower ceiling screen 14) is projected to the screen (upper ceiling screen 12) far from people. You may make it express a sense of perspective by projecting images such as a blue sky far from people and stars.

  On the other hand, in step 112, the overall control unit 30 determines whether or not the earthquake early warning has been received by the communication unit 22. If the determination is negative, the process proceeds to step 116, and if affirmed The process moves to step 114.

  At step 114, the overall control unit 30 executes the earthquake notification process and shifts to step 116. In the earthquake notification process, for example, as shown in FIG. 4 (E), earthquake information is projected and light is blinked or the like, or after reaching the seismic wave, each television is shown as FIG. 4 (F). Project channels and evacuation lights.

  Then, in step 116, the overall control unit 30 determines whether or not the power supply of the control device 20 is turned off. If the determination is negative, the process returns to step 100 to repeat the above-mentioned processing, and the determination is positive. If it has been, the series of processing ends after a predetermined end processing and the like.

  The number of projectors 16 and the number of screens in the above embodiment are not limited to the above.

  In the above embodiment, although the case of the two screens of the upper ceiling screen 12 and the lower ceiling screen 14 has been described, the present invention is not limited thereto, and three or more screens and the corresponding projection devices 16 are provided. You may do so. In the case of three or more sheets, in the case where all the projectors 16 project an image from the same direction by projecting the image from the back side of the screen by projecting the image from the rear side of the screen More space can be saved.

  Further, the process performed by the control device 20 in the above embodiment may be stored as a program in a storage medium so as to be able to be distributed, or may be a process performed by hardware.

10 image projection system 12 upper ceiling screen 14 lower ceiling screen 16 projection device 16A upper ceiling projection device 16B lower ceiling projection device 18 sky camera 20 control device 22 communication unit 26 image control unit 28 setting storage unit 33 emergency power source 36 input・ Setting part 38 Human detection sensor

Claims (10)

A first screen having transparency;
A reflective second screen provided on the back side opposite to the viewing surface of the first screen;
A first projection device provided between the first screen and the second screen for directly projecting an image from the back side of the first screen to the first screen;
At a position between the first screen and the first projection device, or between the first screen and the second screen and at a distance from the first screen that is the same distance as the first projection device A second projection device which is provided and projects an image directly to the surface side which is the observation surface of the second screen;
Video projection system including.   An image mode for projecting an image and an illumination mode for projecting and illuminating light, and in the case of the image mode, a predetermined image is projected on at least one of the first screen and the second screen; The apparatus further includes mode control means for controlling the first projection device and the second projection device to project illumination light to at least one of the first screen and the second screen in the illumination mode. The image projection system according to 1. A plurality of sets of the first screen, the second screen, the first projection device, and the second projection device;
The image according to claim 1 or 2, further comprising: projection control means for controlling each of the first projection device and the second projection device in each set so as to project different images on each screen. Projection system.   A human detection means for detecting a human is provided, and based on the detection result of the human detection means, at least one of the first projection device and the second projection device is controlled to project light to a region where the human exists The image projection system according to any one of claims 1 to 3, further comprising a light control unit.   At least one of the first projection device and the second projection device is provided with a human detection means for detecting a human, and based on the detection result of the human detection means, to project light following the movement of the human. The image projection system according to any one of claims 1 to 4, further comprising light tracking control means for controlling.   A setting means for setting a wake-up time, and a wake-up control means for controlling at least one of the first projection device and the second projection device to project an image or light at the wake-up time set by the setting means. The image projection system according to any one of claims 1 to 5, comprising.   The image pickup device according to claim 1, further comprising: a sky image control unit configured to control at least one of the first projection device and the second projection device so as to project a sky image photographed by the photographing unit. An image projection system according to any one of 1 to 6.   The receiver comprises: receiving means for receiving an earthquake early warning; and earthquake information is projected onto one of the first screen or the second screen when the earthquake early warning is received by the receiving means, the first screen or the second screen The image projection system according to any one of claims 1 to 7, further comprising seismic control means for controlling the first projection device and the second projection device to project light intermittently to the other of the screens. .   The earthquake control means further comprises an emergency power supply, and further controls the first projection device and the second projection device to project at least one of evacuation information and a television program after arrival of the seismic wave. Video projection system as described in.   The second screen is provided on a ceiling of a room, one end of the first screen is fixed to the ceiling, the other end is fixed to a wall of the room, and the second screen is inclined to approach the ceiling as it is separated from the wall The image projection system according to any one of claims 1 to 9, wherein the first projection device and the second projection device are provided on the wall surface between the first screen and the second screen.