JP2018017847A - Projection system and control method for the same - Google Patents

Abstract

A projection system capable of satisfactorily projecting an image even when an obstacle exists in the projection optical path. A projection system including a plurality of projectors for projecting an image on a projection surface, wherein the plurality of projectors are arranged at positions where projection light paths can be different from each other with respect to the one projection surface, and the projection A projection system comprising: a detection unit that detects an obstacle on a surface; and a control unit that controls projection of images by the plurality of projectors based on a detection result by the detection unit. [Selection] Figure 1

Description

  The present invention relates to a projection system and a method for controlling the projection system.

A multi-screen system including a projector that displays an image on each screen as many as a plurality of screens has been proposed (see Patent Document 1). In the multi-screen system, it is possible to make the venue and the entire room a virtual space.
However, in such a multi-screen system, for example, when an image is projected on multiple surfaces of a room by a plurality of projectors, there is a person (viewer) in the room and the optical path of the projection light from the projector is used as the projection surface. If the person is in a position where the light is blocked before reaching, the person may be an obstacle to the projection light, and the image may not be projected on the entire projection surface.

In addition, there has been proposed a projector that moves the projection area to a different projection area when it is detected that an obstacle is present in the projection area on which the image is projected (see Patent Document 2). In the projector, even when the projector is obstructed by an obstacle, the image can be correctly viewed.
However, this technology is a technology related to a single projector.

JP 2003-107580 A JP 2014-163955 A

As described above, conventionally, in a projection system including a plurality of projectors, a countermeasure when an obstacle exists is not sufficient.
The present invention has been made in view of the above points, and an object of the present invention is to provide a projection system and a projection system control method capable of satisfactorily projecting an image even when an obstacle exists. And

In order to solve at least one of the above problems, an aspect of the present invention is a projection system including a plurality of projectors that project an image on a projection surface, and the projection optical path is different from that of the one projection surface. A plurality of projectors arranged at a position to obtain, a detection unit that detects an obstacle on the projection surface, a control unit that controls projection of images by the plurality of projectors based on a detection result by the detection unit, Is a projection system.
With this configuration, in the projection system, the detection unit detects an obstacle on the projection surface, and the control unit is arranged at a position where the projection optical path can be different with respect to one projection surface based on the detection result by the detection unit. Controls the projection of images by multiple projectors. Thereby, in the projection system, it is possible to project an image satisfactorily even when an obstacle exists.

One aspect of the present invention is the projection system, wherein the detection unit detects the obstacle existing in the projection optical path of each of the plurality of projectors, and the control unit projects an image on the projection plane. When the obstacle present in the projection optical path is detected by the detection unit with respect to the projector, the projector is switched from the projector to another projector and projects an image on at least a part of the same projection plane. A configuration for controlling projection of images by the plurality of projectors may be used.
With this configuration, in the projection system, the detection unit detects an obstacle existing in the projection optical path of each of the plurality of projectors, and the control unit detects the projector projecting an image on the projection plane by the detection unit. When an obstacle existing in the projector is detected, control is performed to switch from the projector to another projector. Thus, in the projection system, even when an obstacle existing in the projection optical path of the projector that is projecting an image on the projection surface is detected, the image can be projected favorably by another projector. .

One aspect of the present invention is the projection system, wherein the control unit detects, when the obstacle present in the projection optical path is detected by the detection unit with respect to the projector projecting an image on the projection plane, A configuration in which projection of images by the plurality of projectors is controlled in a control mode in which projection of images by the projector is stopped may be used.
With this configuration, in the projection system, when the obstacle that is present in the projection optical path is detected by the detection unit for the projector that is projecting the image on the projection surface, the control unit stops the projection of the image by the projector. I do. Thus, in the projection system, when an obstacle existing in the projection optical path of the projector that is projecting an image on the projection surface is detected, the projection of the image by the projector is stopped, and the image is projected by another projector. Projection can be performed satisfactorily.

According to an aspect of the present invention, in the projection system, when the obstacle detected in the projection optical path is detected by the detection unit with respect to the other projector that has been switched, the control unit is further different from the projector. In a control mode in which an image is projected onto at least a part of the same projection plane by switching to the above, a configuration in which projection of images by the plurality of projectors is controlled may be used.
With this configuration, in the projection system, the control unit performs control to switch from the projector to another projector when an obstacle existing in the projection optical path is detected by the detection unit with respect to the other switched projector. Thereby, in the projection system, even when an obstacle existing in the projection optical path of the projector after switching is detected, it is possible to project an image satisfactorily by another projector.

According to an aspect of the present invention, in the projection system, the control unit is the same when the obstacle present in the projection optical path is detected for all of the plurality of projectors based on a detection result by the detection unit. Even if a configuration is used in which a part or all of the plurality of projectors capable of projecting an image onto a projection surface project an image at the same time, and control the projection of images by the plurality of projectors. Good.
With this configuration, in the projection system, the control unit projects an image on the same projection plane when an obstacle existing in the projection optical path is detected for all of the plurality of projectors based on the detection result by the detection unit. A part or all of a plurality of projectors capable of performing the control to project an image simultaneously. Thereby, in the projection system, even when an obstacle exists for all of the plurality of projectors, it is possible to project an image satisfactorily.

One aspect of the present invention is a projection system, wherein the control unit includes a position where the obstacle is detected by the detection unit in all of the projection ranges of the plurality of projectors. A configuration for controlling the projection of the image may be used.
With this configuration, in the projection system, the control unit performs control in which all the projection ranges of the plurality of projectors include the position of the obstacle detected by the detection unit. Thus, in the projection system, even when an obstacle is present, the obstacle is positioned at an overlapping portion of the projection range of the plurality of projectors, and the projection of the image is favorably performed as a whole of the plurality of projectors. Is possible.

In one aspect of the present invention, in the projection system, the detection unit is mounted on each of the plurality of projectors, and each of the detection units exists in the projection optical path of the projector on which the detection unit is mounted. A configuration that detects obstacles may be used.
With this configuration, in the projection system, a detection unit is mounted on each of the plurality of projectors, and each detection unit detects an obstacle present in the projection optical path of the projector on which the detection unit is mounted. Thus, in the projection system, in the configuration in which each detection unit is mounted on each projector, it is possible to project an image satisfactorily even when an obstacle exists.

One embodiment of the present invention may employ a configuration in which a plurality of projection planes are provided in the projection system, and the plurality of projectors are provided for each of the projection planes.
With this configuration, the projection system includes a plurality of projectors for each of the plurality of projection surfaces. Thereby, in the projection system, it is possible to project an image satisfactorily even when an obstacle exists on any of the plurality of projection surfaces.

One embodiment of the present invention may employ a configuration in which three projectors are arranged for each of a plurality of vertices of a room in a projection system.
With this configuration, in the projection system, three projectors are arranged at a plurality of vertices of the room. Thereby, in the projection system, it is possible to project an image satisfactorily even when an obstacle exists on the projection surface in the room.

One embodiment of the present invention may employ a configuration in which two projectors are arranged for each of a plurality of sides of a room in a projection system.
With this configuration, in the projection system, two projectors are arranged for each of a plurality of sides of the room. Thereby, in the projection system, it is possible to project an image satisfactorily even when an obstacle exists on the projection surface in the room.

In order to solve at least one of the above-described problems, one aspect of the present invention provides a projection system control method including a plurality of projectors that project an image on a projection surface, and the plurality of projectors are combined with the one projection. The projection unit is arranged at a position where the projection optical path can be different from the plane, the detection unit detects an obstacle on the projection plane, and the control unit detects the image of the plurality of projectors based on the detection result by the detection unit. A projection system control method for controlling projection.
With this configuration, in the projection system control method, an obstacle on the projection surface is detected, and based on the detection result, an image of a plurality of projectors arranged at positions where the projection light paths can be different from each other on one projection surface. Control projection. Thereby, in the control method of the projection system, it is possible to project an image satisfactorily even when an obstacle is present.

  As described above, according to the projection system and the projection system control method according to the present invention, an obstacle on the projection plane is detected, and a position where the projection optical path can be different for each projection plane based on the detection result. Controls the projection of images by a plurality of projectors arranged in the. Thereby, in the projection system and the control method of the projection system according to the present invention, an image can be projected satisfactorily even when an obstacle exists.

It is a figure which shows the schematic structural example of the projection system which concerns on one Embodiment of this invention. It is a figure which shows an example of arrangement | positioning of the target apparatus (projector or detection apparatus) which concerns on one Embodiment of this invention. It is a figure which shows the other example of arrangement | positioning of the target apparatus (projector or detection apparatus) which concerns on one Embodiment of this invention. FIG. 2 is a diagram illustrating a schematic configuration example of a projector according to an embodiment of the invention. It is a figure which shows an example of the person (person's image part) contained in the image which concerns on one Embodiment of this invention, and the said person's shadow (shadow image part). It is a figure which shows an example of the projection range of the some projector which concerns on one Embodiment of this invention. It is a figure which shows the other example of the projection range of the several projector which concerns on one Embodiment of this invention. It is a figure which shows an example of the image in which the some person (person's image part) which concerns on one Embodiment of this invention is contained. It is a figure which shows an example of the procedure of the process performed by the system control apparatus which concerns on one Embodiment of this invention.

Embodiments of the present invention will be described in detail with reference to the drawings.
Note that the word “video” may be used instead of the word “image” in this embodiment.

[Projection system]
FIG. 1 is a diagram showing a schematic configuration example of a projection system 1 according to an embodiment of the present invention.
The projection system 1 according to the present embodiment includes a plurality (four in the example of FIG. 1) of projectors 11 to 14, a plurality of (five in the example of FIG. 1) detection devices 21 to 25, and a system control device. 41, cables that connect each of the plurality of projectors 11 to 14 and the system control device 41 so as to be communicable (the same number of cables 61 to 64 as the plurality of projectors 11 to 14), and each of the plurality of detection devices 21 to 25 And the system control device 41 are communicably connected (the same number of cables 71 to 75 as the plurality of detection devices 21 to 25).

In FIG. 1, a projection surface 81 and a person 91 existing on the projection surface 81 or in the vicinity of the projection surface 81 are shown. The person 91 is, for example, a person who appreciates an image projected on the projection surface 81 (viewer). Note that “(appreciator)” may be referred to as “observer (person)”.
In the example of FIG. 1, the projection plane 81 is a plane having a quadrangular shape, and in this embodiment is a plane of the floor of the room.
Each of the projectors 11 to 14 corresponds to each of a plurality of (four in the example of FIG. 1) vertices of the projection surface 81, and the projection direction is the center (or the vicinity thereof) of the projection surface 81. It is installed to face.
Further, each of the detection devices 21 to 24 corresponds to each of a plurality of (four in the example of FIG. 1) vertices of the projection surface 81, and the detection direction is the center of the projection surface 81 (or It is installed so as to face the neighborhood.
The other detection device 25 is installed in a place where the entire projection surface 81 can be set as a detection range (area), and in the present embodiment, the projection surface 81 (floor surface). It is installed on the ceiling of the room including.

In the present embodiment, the plurality of projectors 11 to 14 project images on the same projection plane 81. At this time, the person 91 can be an obstacle to project an image from the projector (one or more of the plurality of projectors 11 to 14).
The plurality of detection devices 21 to 25 detect predetermined information for the same projection plane 81. In the present embodiment, the plurality of detection devices 21 to 25 detect information that can determine the presence or absence of an obstacle for the same projection plane 81.

Here, in the example of FIG. 1, one projector 11 to 14 and one detection device 21 to 24 are installed at each vertex of the projection plane 81. For example, the projectors 11 to 14 and the detection devices 21 to 24 installed at the same vertex may be installed at close positions.
As an example, for the projectors 11 to 14 and the detection devices 21 to 24 installed at the same vertex, the detection devices 21 to 24 are a part of the projectors 11 to 14 (for example, the housings of the projectors 11 to 14). It may be attached to.
As another example, for the projectors 11 to 14 and the detection devices 21 to 24 installed at the same vertex, the detection devices 21 to 24 may be integrated and incorporated in the projectors 11 to 14.

Each of the projectors 11 to 14 emits light representing the projection target image to the projection plane 81, thereby projecting the image onto the projection plane 81.
In the present embodiment, an image is projected onto the same projection plane 81 by each of the plurality of projectors 11 to 14, thereby displaying a group of images (the entire image of the projection plane 81) on the projection plane 81.

Each of the detection devices 21 to 25 includes a detection unit (respective detection units 31 to 35).
Each of the detection units 31 to 35 detects predetermined information (information that can determine whether there is an obstacle) for the projection plane 81. As the predetermined information, various types of information may be used. For example, image information, light curtain information, or the like may be used.
As an example, when the detection units 31 to 35 have the function of an imaging unit (camera), the imaging unit captures a part or all of the image of the projection surface 81 and detects (acquires) information of the captured image. To do. For example, visible light image information may be acquired using a visible light imaging unit, or an infrared light image may be acquired using an infrared light imaging unit. Further, as the imaging unit, for example, the function of a stereo camera may be used to acquire three-dimensional information, or a fish-eye camera may be used.
As another example, when the detection units 31 to 35 have the function of a light curtain, the light of the light curtain is formed in the vicinity of the projection surface 81 to detect (acquire information about an object that blocks the light of the light curtain. ) For example, a visible light curtain may be used, or an infrared light curtain may be used.

  Each of the detection units 31 to 35 includes, for example, one type of information (for example, visible light image information, infrared light image information, visible light light curtain information, infrared light light curtain information). It may have a function of detecting one type of information) or a function of detecting a plurality of types of information.

The system control device 41 includes a communication unit 51 and a system control unit 52.
The communication unit 51 communicates with the projectors 11 to 14 via the cables 61 to 64, respectively.
The communication unit 51 communicates with each of the detection devices 21 to 25 via the respective cables 71 to 75.
In this embodiment, wired communication is performed via the respective wired cables 61 to 64 and 71 to 75. However, as another configuration example, wireless communication may be performed instead of wired communication. In this case, among the system control device 41, the projectors 11 to 14, and the detection devices 21 to 25, a device that performs wireless communication has a wireless communication function.

The system control unit 52 is a control unit that controls various processes in the system control device 41.
The system control unit 52 communicates with each of the detection devices 21 to 25 via the communication unit 51, and receives and acquires information detected by the detection units 31 to 35 of each of the detection devices 21 to 25.
Further, the system control unit 52 determines the presence or absence of an obstacle based on information acquired from the detection devices 21 to 25. If the system control unit 52 determines that there is an obstacle, the system control unit 52 specifies the position of the obstacle based on information acquired from the detection devices 21 to 25.
In this case, the system control unit 52 determines a mode (control mode) for controlling the projectors 11 to 14 based on the position of the identified obstacle. The system control unit 52 controls the projectors 11 to 14 based on the determined control mode of the projectors 11 to 14. The system control unit 52 communicates with the projectors 11 to 14 via the communication unit 51 and controls the projectors 11 to 14 by transmitting control signals to the projectors 11 to 14. Each of the projectors 11 to 14 projects an image based on a control signal received from the system control unit 52.
Further, the system control unit 52 can also transmit a signal other than the control signal (for example, a signal representing image information) to each of the projectors 11 to 14 via the communication unit 51.

Here, various methods may be used as the method in which the system control unit 52 determines the presence or absence of an obstacle and the method in which the system control unit 52 determines the position of an obstacle, respectively. As an example, when image information is detected by the detection unit (one or more of the detection units 31 to 35), the system control device 41 stores a template image of an obstacle, and the system control unit 52 An image portion that matches the template image may be determined as an obstacle (an image portion of the obstacle). As another example, when image information is detected by the detection unit (one or more of the detection units 31 to 35), the system control device 41 stores a template image that is not regarded as an obstacle, The system control unit 52 may determine not to regard an image portion matching the template image as an obstacle (an image portion of the obstacle).
Further, when image information is detected by the detection unit (one or more of the detection units 31 to 35), the system control unit 52 is projected by, for example, a projector (one or more of the projectors 11 to 14). The determination regarding the obstacle may be performed based on the result of comparing the captured image and the image captured by the detection unit.

When determining the position of the obstacle, the system control unit 52 may determine the shape (for example, the outer shape) of the obstacle. For example, the system control unit 52 may store and use the obstacle information as point information indicating the position of the obstacle, or use the obstacle information as the position of the obstacle (here, , A representative position such as the center of gravity) and a frame representing the shape of the obstacle may be stored and used.
In the present embodiment, the case where the person 91 becomes an obstacle is shown, but as another example of the configuration, an arbitrary object may be used as the obstacle, and it may not be a living thing.

Here, in the present embodiment, in the projection system 1, the system control device 41 has a role as a host computer for constructing an image by the plurality of projectors 11 to 14.
In the present embodiment, the system control device 41 is provided as a device other than the projectors 11 to 14. However, as another configuration example, any one projector (one projector among the plurality of projectors 11 to 14). ) May have the same function as the system control device 41. The same function as that of the system control unit 52 of the system control device 41 may be provided in, for example, the projector control unit 319 (see FIG. 4) of the projector. The same function as that of the communication unit 51 of the system control device 41 may be provided in, for example, the communication unit 312 (see FIG. 4) of the projector.

[Arrangement of projector or detector]
In the example of FIG. 1, an example of the arrangement of the projectors 11 to 14 and the detection devices 21 to 25 related to one projection plane 81 is shown, but a plurality of projection planes may be used.
An example in which a plurality of target devices are arranged on a plurality of projection planes will be described with reference to FIGS. 2 and 3. In the present embodiment, the target device is a projector or a detection device.

FIG. 2 is a diagram illustrating an example of the arrangement of the target devices 131 to 134, 141 to 144, and 151 to 154 (projectors or detection devices) according to an embodiment of the present invention.
In addition, in FIG. 2, the target apparatuses 131-134, 141-144, 151-154 are shown schematically.
In FIG. 2, three projection planes 111 to 113 are shown. These projection surfaces 111 to 113 correspond to three surfaces that are in contact with each other in one room having a rectangular parallelepiped (or cubic) shape.

In the example of FIG. 2, each of the four target devices 131 to 134 provided for the projection plane 111 is installed at each vertex of the first projection plane 111.
Similarly, in the example of FIG. 2, each of the four target devices 141 to 144 provided for the projection plane 112 is installed at each vertex of the second projection plane 112. Yes.
Similarly, in the example of FIG. 2, each of the four target devices 151 to 154 provided for the projection plane 113 is installed at each vertex of the third projection plane 113. Yes.
In the example of FIG. 2, although not shown, this room has six surfaces, and FIG. 2 shows three surfaces (projection surfaces 111 to 113). Similarly, the arrangement is such that the target devices are also installed on the three surfaces.
In the example of FIG. 2, a detection device provided on a surface facing each of the projection surfaces 111 to 113 (in the example of FIG. 1, a detection device 25 installed on the ceiling with respect to the projection surface 81 that is a floor). ) Is not shown, but such a detection device may be provided and installed.

As described above, the example of FIG. 2 has a configuration in which three target devices (projectors or detection devices) are arranged at locations corresponding to the vertices of the room. As a specific example, three target devices 132, 143, and 154 are arranged at one vertex in the example of FIG.
Here, the location corresponding to the vertex may be, for example, the location of the vertex, or a location near the vertex that is slightly deviated from the vertex. For example, when the target device is arranged with respect to the vertex, the target device may be slightly shifted from the vertex depending on the number, size, or shape of the target device. Such arrangement is also included in the arrangement in which the arrangement is made corresponding to the vertex.

FIG. 3 is a diagram illustrating another example of the arrangement of the target devices 231 to 234, 241 to 244, and 251 to 254 (projectors or detection devices) according to an embodiment of the present invention.
In FIG. 3, target devices 231 to 234, 241 to 244, and 251 to 254 are schematically shown.
FIG. 3 shows three projection planes 211 to 213. These projection planes 211 to 213 correspond to three planes in contact with each other in one room having a rectangular parallelepiped (or cubic) shape.

In the example of FIG. 3, each of the four target devices 231 to 234 provided for the projection plane 211 is installed at the center of each side of the first projection plane 211. .
Similarly, in the example of FIG. 3, each of the four target devices 241 to 244 provided for the projection plane 212 is installed at the center of each side of the second projection plane 212. It has become.
Similarly, in the example of FIG. 3, each of the four target devices 251 to 254 provided for the projection plane 213 is installed at the center of each side of the third projection plane 213. It has become.
Although not shown in the example of FIG. 3, this room has six surfaces, and FIG. 3 shows three surfaces (projection surfaces 211 to 213). Similarly, the arrangement is such that the target devices are also installed on the three surfaces.
In the example of FIG. 3, a detection device provided on a surface facing each of the projection surfaces 211 to 213 (in the example of FIG. 1, the detection device 25 installed on the ceiling with respect to the projection surface 81 that is a floor). ) Is not shown, but such a detection device may be provided and installed.

As described above, the example of FIG. 3 has a configuration in which two target devices (projectors or detection devices) are arranged at positions corresponding to the center of each side of the room. As a specific example, two target devices 231 and 244 are arranged at one side in the example of FIG.
Here, the location corresponding to the center may be, for example, the center, or a location near the center that is slightly deviated from the center. For example, when the target device is arranged with respect to the center, the target device may be slightly deviated from the center depending on the number, size, or shape of the target device. Such an arrangement is also included in the arrangement arranged in the place corresponding to the center.

Note that both the arrangement according to the example of FIG. 2 and the arrangement according to the example of FIG. 3 may be used as the arrangement of the projector or the detection device.
Further, different arrangements may be used for the projector and the detection device. For example, any one of the arrangement shown in the example of FIG. 2 and the arrangement shown in the example of FIG. 3 may be applied to the projector, and the other arrangement may be applied to the detection device.
Further, any arrangement different from the arrangement shown in FIG. 2 or 3 may be used. For example, in the example of FIG. 2 and the example of FIG. 3, a target device (projector or detection device) installed on the surface is used as a device that performs processing related to a certain surface. As a device for performing the process, a target device installed on another surface in contact with the surface may be used, or a target device installed on another location may be used.

Further, the number of projectors used to project an image on each projection surface may be arbitrary.
In addition, the number of detection devices that detect predetermined information for each projection plane may be arbitrary.
Further, the shape of the room or the number of surfaces of the room may be arbitrary.
Further, in the example of FIG. 2 and the example of FIG. 3, a target device (projector or detection device) that performs processing related to the surface for all of a plurality of surfaces of the room to be monitored is provided. As a configuration example, a target device that performs processing related to a part of the plurality of faces (an arbitrary number of one or more) of a room to be monitored may be provided.

Here, in the present embodiment, a configuration in which an image is projected in the direction assigned to each projector 11 to 14 by each projector 11 to 14 is shown. However, as another configuration example, two or more projectors are provided. A configuration capable of projecting an image in different directions may be used. In this case, in the present embodiment, it is possible to project images performed by a predetermined number of projectors of two or more in a single operation.
Further, in the present embodiment, a configuration is shown in which each detection device 21 to 25 detects information of the direction assigned to each detection device 21 to 25. However, as another configuration example, one detection device is 2 in number. A configuration capable of detecting information in more than one different direction may be used. In this case, in the present embodiment, detection of information performed by a predetermined number of two or more detection devices can be performed collectively by one detection device.
As a specific example, with respect to the example of FIG. 2, it is possible to place one target device (projector or detection device) corresponding to three different directions at each vertex of the room.
As a specific example, with respect to the example of FIG. 3, it is possible to place one target device (projector or detection device) corresponding to two different directions at the center of each side of the room.

In this embodiment, as each of the projectors 11 to 14, a projector capable of proximity projection is used, and as a specific example, an ultra-single focus projector is used. By using such projectors 11 to 14, each of the projectors 11 to 14 can project an image from close proximity to the adjacent walls. Thus, for example, even when a viewer who is an obstacle is sitting or standing, it is possible to reduce the occurrence of a shadow or a non-projectible range around the viewer. The image can be displayed on the entire surface (or almost the entire surface).
As another configuration example, as each of the projectors 11 to 14, a projector that is not a super single focus type may be used. In this case, for example, each of the projectors 11 to 14 is installed at a position farther from each projection plane than in the case of the super single focus type.

[Projector configuration]
FIG. 4 is a diagram illustrating a schematic configuration example of the projector 11 according to an embodiment of the invention.
In the example of FIG. 1, the configuration and operation of the other projectors 12 to 14 are the same as the configuration and operation of the projector 11, and detailed description thereof is omitted.
The projector 11 according to the present embodiment includes an operation panel 311, a communication unit 312, an image information input unit 313, an image processing unit 314, an OSD processing unit 315, a light source control unit 316, an image projection unit 317, A lens shift driving unit 318 and a projector control unit 319 are provided.
The image projection unit 317 includes a liquid crystal driving unit 331, a light source 332, three liquid crystal light valves 333R, 333G, and 333B corresponding to red (R), green (G), and blue (B), and a projection lens. 334.
The projector 11 is connected to the cable 61.

The operation panel 311 includes a plurality of operation keys, and outputs information corresponding to an operation performed on the operation keys by a user (person) to the projector control unit 319.
The communication unit 312 has a function of communicating with the system control device 41 via the cable 61. In the present embodiment, the communication unit 312 outputs a control signal (a signal for controlling the projector 11) received from the system control device 41 to the projector control unit 319. The communication unit 312 may output image information received from the system control device 41 to the image information input unit 313.

The image information input unit 313 inputs image information from an external device (which may be a storage medium) and outputs the image information to the image processing unit 314. In the present embodiment, the image information input unit 313 may input image information transmitted from the system control device 41 from the communication unit 312 and output the information to the image processing unit 314.
The image processing unit 314 performs predetermined processing on the image information input from the image information input unit 313, and outputs the image information on which the processing has been performed to the OSD processing unit 315. As this processing, the input image information is converted into information representing the gradation of each pixel of the liquid crystal light valves 333R, 333G, and 333B, that is, information for defining the drive voltage applied to each pixel. Is used. In this case, the image processing unit 314 performs processing for adjusting the image quality such as brightness, contrast, sharpness, and hue on the converted image information based on the control performed by the projector control unit 319. Also good.

The OSD processing unit 315 performs processing for combining (superimposing) an OSD (on-screen display) image on an image based on image information input from the image processing unit 314 based on control performed by the projector control unit 319. The information of the image subjected to the processing is output to the liquid crystal driving unit 331. As the OSD image, an arbitrary image may be used. For example, an image representing a menu that allows the user to specify an item from among a plurality of items or an image representing a message is used. Also good.
Note that the OSD processing unit 315 outputs the image information input from the image processing unit 314 to the liquid crystal driving unit 331 as it is when there is no instruction to synthesize the OSD image.

The light source control unit 316 controls the supply and stop of power to the light source 332 based on the control performed by the projector control unit 319, and switches on / off the lamp of the light source 332.
The light source 332 emits light. As an example, the light source 332 includes a discharge lamp (not shown) such as an ultra-high pressure mercury lamp or a metal halide lamp, and a reflector that reflects light emitted from the lamp toward the liquid crystal light valves 333R, 333G, and 333B. (Not shown).
In the present embodiment, light emitted from the light source 332 is converted into light having a substantially uniform luminance distribution by an integrator optical system (not shown), and red, which is the three primary colors of light, by a color separation optical system (not shown). After being separated into light components of (R), green (G), and blue (B), the light enters the liquid crystal light valves 333R, 333G, and 333B.

The liquid crystal driving unit 331 drives the respective liquid crystal light valves 333R, 333G, and 333B based on the image information input from the OSD processing unit 315.
Each of the liquid crystal light valves 333R, 333G, and 333B is driven by the liquid crystal driving unit 331, and modulates the light emitted from the light source 332 into image light corresponding to image information related to driving. The image information relating to the driving is information on an image input from the OSD processing unit 315 to the liquid crystal driving unit 331.
The image light modulated by the respective liquid crystal light valves 333R, 333G, and 333B is projected from the projection lens 334.

  Each of the liquid crystal light valves 333R, 333G, and 333B is constituted by, for example, a liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates. Each of the liquid crystal light valves 333R, 333G, and 333B includes a rectangular pixel region in which a plurality of pixels (not shown) are arranged in a matrix, and applies a driving voltage to the liquid crystal for each pixel. Is possible. When the liquid crystal driving unit 331 applies a driving voltage corresponding to information of an input image to each pixel, each pixel is set to a light transmittance corresponding to the information of the image. The light emitted from the light source 332 is modulated by transmitting through the pixel regions of the respective liquid crystal light valves 333R, 333G, and 333B, and image light corresponding to information on the image is formed for each color light. The formed image light of each color is synthesized for each pixel by a color synthesis optical system (not shown) to become color image light, and then enlarged and projected by the projection lens 334.

The lens shift drive unit 318 includes a motor and gears that move the projection lens 334, and changes the projection position of the projection image by moving the projection lens 334 based on control performed by the projector control unit 319. . The directions that can be moved by the lens shift include vertical and horizontal directions with respect to the initial position (default position), or diagonal directions.
In the present embodiment, the direction in which an image is projected from the projector 11 (the direction of the projected light) may be changed by, for example, control of an optical system (other than the lens shift), or the lens shift It may be changed by control or may be changed by both.

The projector control unit 319 is a control unit that controls various processes in the projector 11.
The projector control unit 319 includes, for example, a processor such as a CPU (Central Processing Unit), a RAM (Random Access Memory) used for temporary storage of information (data), and a nonvolatile ROM used for storage of information (data). (Read Only Memory) and the like, and the processor operates in accordance with a control program stored in a ROM or the like, so that the operation of the projector 11 is comprehensively controlled.

In the present embodiment, the light source 332 is a discharge-type light source lamp. However, the light source 332 is not limited to the light source lamp, and an LED (Light Emitting Diode) light source, a laser light source, or the like may be used.
In the present embodiment, the liquid crystal panel is a transmissive liquid crystal panel corresponding to each of RGB, which is the three primary colors of light, but is not limited to a transmissive liquid crystal panel, and a reflective liquid crystal panel may be used. Good.
Further, the liquid crystal light valves 333R, 333G, and 333B may employ a configuration of DLP (Digital Light Processing) including DMD (Digital Mirror Device) instead of a configuration including a liquid crystal panel.

[About the shadow of people]
FIG. 5 is a diagram illustrating an example of a person (person image portion) 421 and a person's shadow (shadow image portion) 422 included in an image 411 according to an embodiment of the present invention.
The image 411 is an example of an image detected when the imaging device is used in the detection unit (one or more detection units 31 to 35 in the present embodiment).
The system control unit 52 detects the presence of the person 421 and the position where the person 421 exists based on the image 411 acquired from the detection unit. This detection may be performed using any method, for example, a method using a template image having a human shape or a method for searching for human characteristics may be used.

Here, as in the example of FIG. 5, when the image 411 includes the shadow 422 of the person 421, as an example, the system control unit 52 uses the part of the person 421 excluding the part of the shadow 422 as an obstacle. To detect. As another example, when some error is allowed, the system control unit 52 may detect the part of the person 421 including part or all of the part of the shadow 422 as an obstacle. The system control unit 52 may adopt the shape of the detected obstacle as the shape of the obstacle, or a predetermined shape such as a rectangle (or a square) may be used in advance. The predetermined shape which is defined and includes the shape of the detected obstacle may be adopted.
As an example, the system control unit 52 uses the visible light image in which the person 421 and the shadow 422 appear, and the infrared light image in which the person 421 appears but the shadow 422 does not appear (or does not appear so much). And the shadow 422 may be distinguished. As another example, the system control unit 52 uses the visible light image in which the person 421 and the shadow 422 appear, and the information on the light curtain in which the person 421 is detected but the shadow 422 is not detected. May be distinguished.

[Control of image projection by multiple projectors]
The projection system 1 according to the present embodiment includes a plurality of projectors 11 to 14 that project images onto the projection plane 81. The plurality of projectors 11 to 14 are arranged at positions where the projection optical paths can be different from each other with respect to one projection plane 81. In addition, the detection units 31 to 35 detect an obstacle (in the example of FIG. 1, a person 91) on the projection plane 81. The system control unit 52 controls the projection of images by the plurality of projectors 11 to 14 based on the detection results by the detection units 31 to 35.
Here, various control modes may be used as a mode in which the system control unit 52 controls the projection of images by the plurality of projectors 11 to 14.

As an example, the detection units 31 to 35 detect obstacles existing in the projection light paths of the plurality of projectors 11 to 14. The system control unit 52 uses a detection unit (one or more of the detection units 31 to 35) to project the projector (any one of the projectors 11 to 14) that is projecting an image onto the projection plane 81 into the projection optical path. In a control mode in which an obstacle is detected, the projector is switched to another projector (any one of the projectors 11 to 14) and an image is projected onto at least a part of the same projection surface 81. The projection of images by the projectors 11 to 14 is controlled.
Here, the range in which the image is projected by the projector before switching and the range in which the image is projected by the projector after switching may be, for example, the same range or a partially overlapping range. Good. For example, the projector after switching performs projection of an image that can supplement the projection of the image performed by the projector before switching. For example, the system control unit 52 selects a projector that does not affect the projection of an image from the projector as the projector after switching.

As an example, the system control unit 52 projects a projector (one of the projectors 11 to 14) that is projecting an image on the projection surface 81 by a detection unit (one or more of the detection units 31 to 35). When an obstacle existing in the optical path is detected, projection of images by the plurality of projectors 11 to 14 is controlled in a control mode in which projection of images by the projector is stopped. That is, the system control unit 52 switches the projector that projects an image based on the obstacle detection status.
For example, instead of projecting the image performed by the projector before switching, the projector after switching performs projection of an image that can supplement the projection of the image.

As an example, the system control unit 52 detects an obstacle present in the projection optical path by the detection unit (one or more of the detection units 31 to 35) with respect to another switched projector (the projector after switching). In this case, the projectors 11 to 14 project an image in a control mode in which the projector is switched to another projector (any one of the projectors 11 to 14) and an image is projected onto at least a part of the same projection surface. Control. That is, after switching from one projector to another projector, the system control unit 52 further switches to another projector when an obstacle is detected in the projection optical path of the other projector. For example, the system control unit 52 selects a projector that does not affect the projection of an image from the projector as the projector after switching.
For example, the system control unit 52 detects the movement of the obstacle (for example, a change in position) based on the detection result of the detection unit (one or more of the detection units 31 to 35) in real time, for example. Control may be performed to sequentially switch to a projector in which an object does not become an obstacle (a projector in which an obstacle does not affect image projection).

  As an example, the system control unit 52 detects obstacles existing in the projection optical path for all of the plurality of projectors 11 to 14 based on the detection result by the detection unit (one or more of the detection units 31 to 35). In such a case, a part or all of the plurality of projectors 11 to 14 capable of projecting images on the same projection plane simultaneously project images, and the plurality of projectors 11 to 14 project images. Control.

As an example, the system control unit 52 is a control mode in which all of the projection ranges of the plurality of projectors 11 to 14 include the position of the obstacle detected by the detection unit (one or more of the detection units 31 to 35). The projection of images by the plurality of projectors 11 to 14 is controlled.
Thereby, an obstacle is included in the overlapping part of all the projection ranges of the plurality of projectors 11 to 14.

  As an example, detection units 31 to 34 (except for one detection unit 35 in the example of FIG. 1) are mounted on each of the plurality of projectors 11 to 14. And each detection part 31-34 detects the obstruction which exists in the projection optical path of the projectors 11-14 with which the said detection parts 31-34 are mounted.

As an example, a plurality of projection surfaces 81 may be provided, and a plurality of projectors 11 to 14 may be provided for each projection surface 81. That is, the projection system 1 may be provided with a plurality of configurations as shown in FIG. 1. In this case, for example, the system control device 41 may be shared.
As an example, a configuration in which three projectors are arranged at a plurality of vertices of a room may be used.
As an example, a configuration in which two projectors are arranged for a plurality of sides of a room may be used.

Here, as another configuration example, the system control unit 52 determines the position of the obstacle detected by the detection unit (one or more of the detection units 31 to 35) in any of the projection ranges of the plurality of projectors 11 to 14. The projection of images by the plurality of projectors 11 to 14 is controlled in a control mode that does not include the image.
Thereby, no obstacle is included in any of the projection ranges of the plurality of projectors 11 to 14, and it is possible to avoid the light projected from the projectors 11 to 14 from directly hitting the obstacle. Such control is effective, for example, when the obstacle is a person and it is desirable that the person does not receive projection light. In such a case, when the projection light from the projectors 11 to 14 is projected on a person, the person may not be able to interfere with the image comfortably. Since this depends on the usage status of the projection system 1 and the like, in this embodiment, a control mode in which projection light from a projector (one or more of the projectors 11 to 14) is projected onto a person is used. May be.

  As another configuration example, more projectors may be provided for one projection plane. For example, the greater the number of projectors that can be projected onto one projection plane, the greater the variation in projection from the projector when projecting an image onto the projection plane. For this reason, the system control unit 52 has a high degree of freedom in selecting a projector from which a projection light is not affected by an obstacle from among a plurality of projectors, whereby the projection light is not affected by an obstacle. When more than one projector is selected, it becomes easy to project a desired image (entire image) on the projection plane as a whole by the selected projector.

[Example of projecting images from multiple projectors]
FIG. 6 is a diagram illustrating an example of the projection ranges 511 to 514 of the plurality of projectors 11 to 14 according to the embodiment of the invention.
FIG. 6 shows the same projection plane 81 and a plurality of projectors 11 to 14 as shown in FIG. FIG. 6 shows a person 91a existing in the range of the projection plane 81. In the example of FIG. 6, the person 91a becomes an obstacle.
The system control unit 52 detects an obstacle (in the example of FIG. 6, a person 91a) and the position of the obstacle based on information acquired from one or more of the plurality of detection units 31 to 35. Based on the detection result, projection of images performed by the projectors 11 to 14 is controlled.

As an example, the system control unit 52 may transmit information of an image projected by each projector 11 to 14 and a projection mode (a control signal including a projection mode) to each projector 11 to 14. In this case, such image information and the projection mode are examples of the control mode.
As a specific example, the system control unit 52 specifies the position of an obstacle based on information (for example, image information) detected by the detection device 25 installed on the ceiling wall of the room. In the system control device 41, the drawing of the room to be monitored and the information on the installation status of the projectors 11 to 14 are input and stored in advance. The system control unit 52 controls the range of images projected by the projectors 11 to 14 based on the result of reflecting the determined obstacle position in the drawing of the room. For example, the system control device 41 stores information on an image to be projected as the entire room in a storage unit (not shown), and the system control unit 52 assigns the image to each projector 11 to 14, respectively. The information of the image part (image part divided | segmented into the image range allocated to each) allocated to each projector 11-14 is transmitted (transmitted). For example, transmission via a digital video interface may be used for transmission of an image between the system control device 41 and each of the projectors 11 to 14.
As another example, when image information is input to the projectors 11 to 14 from a device other than the system control device 41, the system control unit 52 projects the projections of the projectors 11 to 14 (projection modes). May be transmitted to the projectors 11 to 14. In this case, such a projection mode is an example of a control mode.

When projecting image portions assigned to the respective projectors 11 to 14 from a plurality of projectors 11 to 14, for example, overlapping portions (same image portions) are included in image portions projected from two or more projectors. May be.
In addition, when an overlapping portion (the same image portion) is included in an image portion projected from two or more projectors, the overlapping portion (the image) is displayed so that the projected image looks good visually in the overlapping portion. Arbitrary correction processing may be performed on (part).

FIG. 6 shows an example of the projection ranges 511 to 514 of the projectors 11 to 14. The projection ranges 511 to 514 are controlled by control signals transmitted from the system control unit 52 to the projectors 11 to 14.
In the example of FIG. 6, the projection ranges 511 to 514 of the projectors 11 to 14 are all ranges including an obstacle (in the example of FIG. 6, a person 91 a). That is, these projection ranges 511 to 514 overlap (overlap) at the obstacle portion. In the example of FIG. 6, the projection ranges 511 to 514 of the respective projectors 11 to 14 are ranges from the positions (projection positions) of the respective projectors 11 to 14 to including the obstacle portion. . In the example of FIG. 6, the projection ranges 511 to 514 of the projectors 11 to 14 have a curved shape.

By using the projection ranges 511 to 514 of the plurality of projectors 11 to 14 as described above, as a result of the entire projection by the plurality of projectors 11 to 14, the projection surface 81 can be visually observed even around an obstacle. It is possible to project a good image.
Here, in the example of FIG. 6, the entire projection surface 81 (or almost the entire surface) may be covered by the projection ranges 511 to 514 of the plurality of projectors 11 to 14. In addition, the system control unit 52 controls the mode of projection by the projectors 11 to 14 so that the images projected to the projection ranges 511 to 514 by the projectors 11 to 14 are unified as a whole.

Here, in the example of FIG. 6, the system control unit 52 has shown the case where the projection ranges 511 to 514 of the respective projectors 11 to 14 perform the control in a control mode including an obstacle, but various other control modes. May be used.
For example, a control mode in which some or all of the projection ranges 511 to 514 of the plurality of projectors 11 to 14 do not include an obstacle may be used.
In addition, for example, a control mode in which image projection is stopped for some of the plurality of projectors 11 to 14 may be used.

FIG. 7 is a diagram showing another example of the projection ranges 611 to 614 of the plurality of projectors 11 to 14 according to the embodiment of the present invention.
FIG. 7 shows the same projection plane 81 and a plurality of projectors 11 to 14 as shown in FIG. FIG. 7 shows a person 91b existing in the range of the projection plane 81. In the example of FIG. 7, the person 91b becomes an obstacle.
The system control unit 52 detects an obstacle (a person 91b in the example of FIG. 7) and the position of the obstacle based on information acquired from one or more of the plurality of detection units 31 to 35. Based on the detection result, projection of images performed by the projectors 11 to 14 is controlled.

  In the example of FIG. 7, similarly to the example of FIG. 6, the projection ranges 611 to 614 of the projectors 11 to 14 are all ranges including an obstacle (in the example of FIG. 7, the person 91 b). ing. That is, these projection ranges 611 to 614 overlap (overlap) at the obstacle portion. In the example of FIG. 7, the projection ranges 611 to 614 of the respective projectors 11 to 14 are ranges from the positions (projection positions) of the respective projectors 11 to 14 to including the obstacle portion. . In the example of FIG. 7, the projection ranges 611 to 614 of the projectors 11 to 14 have a rectangular shape (may be a square).

Here, in the example of FIG. 7, the system control unit 52 has shown the case where the projection ranges 611 to 614 of the respective projectors 11 to 14 perform control in a control mode including an obstacle. However, various other control modes are illustrated. May be used.
For example, a control mode in which some or all of the projection ranges 611 to 614 of the plurality of projectors 11 to 14 do not include an obstacle may be used.
In addition, for example, a control mode in which image projection is stopped for some of the plurality of projectors 11 to 14 may be used.

[When there are multiple obstacles]
FIG. 8 is a diagram illustrating an example of an image 711 including a plurality of persons (personal image portions) 721 and 722 according to an embodiment of the present invention.
The system control unit 52 may detect two or more distinguishable obstacles based on information detected by the detection units 31 to 35 (information of the image 711 in the example of FIG. 8).
In this case, as an example, the system control unit 52 may detect and detect any number (two or more in this case) or all of these two or more obstacles as a group of obstacles. Good. In the example of FIG. 8, the system control unit 52 detects two obstacles (in the example of FIG. 8, one person 721 and another person 722), and the range of the frame including these two obstacles 731 is detected as a part of a block of obstacles. Then, the system control unit 52 controls the projection by the plurality of projectors 11 to 14 by regarding the block portion as a single block portion.

As another example, when two or more obstacles are detected, the system control unit 52 ignores obstacles other than any one obstacle, and determines a plurality of obstacles based on the one obstacle. Projection by the projectors 11 to 14 may be controlled.
As another example, when three or more obstacles are detected, the system control unit 52 ignores obstacles other than some of the obstacles (two or more obstacles smaller than the total number). The projection by the plurality of projectors 11 to 14 may be controlled based on the part of the obstacle.

[Example of control performed by the system controller]
FIG. 9 is a diagram illustrating an example of a procedure of processing performed by the system control device 41 according to an embodiment of the present invention.
In the system control device 41, the system control unit 52 communicates with each of the detection devices 21 to 25 via the communication unit 51, and detects information (detection) detected by the detection units 31 to 35 of the detection devices 21 to 25. The result is received and acquired (step S1).
Next, the system control unit 52 determines the presence or absence of an obstacle based on information acquired from the detection devices 21 to 25 (step S2).

  As a result of the determination in the process of step S2, if it is determined that there is no obstacle (step S2: NO), the system control unit 52 proceeds to the process of step S1, and the process of step S1 and the process of step S2 Repeat this step. In this case, the system control unit 52 may control projection by the plurality of projectors 11 to 14 in an arbitrary control mode. That is, in this case, since there is no obstacle, it is not necessary to consider the obstacle in the control of the plurality of projectors 11 to 14.

On the other hand, when it is determined that there is an obstacle as a result of the determination in the process of step S2 (step S2: YES), the system control unit 52 determines the obstacle based on the information acquired from the detection devices 21 to 25. The position of the object is specified (step S3).
Next, the system control unit 52 determines a mode (control mode) for controlling the projectors 11 to 14 based on the identified position of the obstacle (step S4).
And the system control part 52 controls each projector 11-14 based on the determined control aspect of each projector 11-14 (step S5).
Thereby, the plurality of projectors 11 to 14 project an image in consideration of the obstacle present on the projection surface 81.

[Summary of Embodiment]
As described above, in the projection system 1 according to the present embodiment, it is possible to project an image satisfactorily even when an obstacle exists.
In the projection system 1 according to the present embodiment, for example, in a multi-screen system that projects and displays an image on the entire surface of a room, an obstacle (for example, a viewer) is detected using the detection units 31 to 35 installed in the room. ) And controlling a plurality of projectors 11 to 14 according to the position of the specified obstacle, an environment in which the viewer can feel a sense of being realistic or immersive compared to the conventional case. Can be built.
In the projection system 1 according to the present embodiment, for example, it is possible to control the plurality of projectors 11 to 14 in a control mode that reduces (ideally, eliminates) a shadow formed on the projection surface 81 by an obstacle. .

In the projection system 1 according to the present embodiment, for example, the system control unit 52 may control the plurality of projectors 11 to 14 as well as control the sound or air conditioning. By performing such control, it is possible to further enhance the sense of presence or immersion.
In the projection system 1 according to the present embodiment, for example, by increasing the number of projectors to be installed, even when there are a plurality of obstacles (for example, viewers), a desired image is displayed on the entire projection surface 81. It is possible to display.

Further, the projection system 1 according to the present embodiment may be applied to various things.
For example, the projection system 1 according to the present embodiment may be applied to a projection surface of a spherical room or an elliptical room. Further, the projection system 1 according to the present embodiment may be applied to a projection surface in a vehicle such as an automobile or a bus, or a projection surface in a train.
In addition, the projection system 1 according to the present embodiment may be applied to, for example, an attraction apparatus or various facilities. As a specific example, in the projection system 1 according to the present embodiment, a large picture is projected on a projection surface such as a floor, a ceiling, or a wall, so that a viewer can experience a simulated trip while in the room. As an example, it is possible to make the viewer feel as if they are visiting the aurora.
It is also possible to provide a control method (control method) for processing performed in the projection system 1 according to the present embodiment.

Note that a computer-readable recording medium (memory) stores a program for realizing the functions of arbitrary components in the devices described above (for example, the system control device 41, the projectors 11 to 14, the detection devices 21 to 25, and the like). The program may be recorded (stored) on a medium, and the program may be read into a computer system and executed. The “computer system” here includes an operating system (OS) or hardware such as peripheral devices. The “computer-readable recording medium” means a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD (Compact Disc) -ROM, or a storage device such as a hard disk built in the computer system. . Further, the “computer-readable recording medium” means a volatile memory (RAM: Random Access) inside a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. Memory that holds a program for a certain period of time, such as Memory).
In addition, the above program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
Further, the above program may be for realizing a part of the functions described above. Further, the program may be a so-called difference file (difference program) that can realize the above-described functions in combination with a program already recorded in the computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Projection system, 11-14 ... Projector, 21-25 ... Detection apparatus, 31-35 ... Detection part, 41 ... System control apparatus, 51, 312 ... Communication part, 52 ... System control part, 61-64, 71- 75 ... Cable, 81, 111 to 113, 211 to 213 ... Projection plane, 91, 91a, 91b, 421, 721 to 722 ... Human, 131 to 134, 141 to 144, 151 to 154, 231 to 234, 241 to 244 251 to 254 ... target device, 311 ... operation panel, 313 ... image information input section, 314 ... image processing section, 315 ... OSD processing section, 316 ... light source control section, 317 ... image projection section, 318 ... lens shift drive section 319 ... Projector control unit, 331 ... Liquid crystal drive unit, 332 ... Light source, 333R, 333G, 333B ... Liquid crystal light valve , 334 ... projection lens, 411,711 ... image, 422 ... shadow, 511～514,611～614 ... projection range, 731 ... range

Claims (11)

A projection system comprising a plurality of projectors for projecting images on a projection surface,
The plurality of projectors arranged at positions where projection optical paths can be different from each other on one projection plane;
A detection unit for detecting an obstacle on the projection plane;
A control unit that controls projection of images by the plurality of projectors based on a detection result by the detection unit;
A projection system comprising: The detection unit detects the obstacle present in the projection optical path of each of the plurality of projectors;
When the obstacle that is present in the projection optical path is detected by the detection unit with respect to the projector that is projecting an image on the projection surface, the control unit switches from the projector to another projector and switches to the same projection surface. Controlling the projection of images by the plurality of projectors in a control mode in which an image is projected onto at least a part of the projector;
The projection system according to claim 1. In the control mode, the control unit stops projection of an image by the projector when the obstacle present in the projection optical path is detected by the detection unit with respect to the projector that is projecting an image on the projection plane. Controlling projection of images by the plurality of projectors;
The projection system according to claim 2. When the obstacle detected in the projection optical path is detected by the detection unit with respect to the other projector that has been switched, the control unit switches from the projector to another projector to at least part of the same projection plane. Controlling the projection of images by the plurality of projectors in a control mode for projecting images;
The projection system according to claim 2 or 3. The control unit can project an image on the same projection plane when the obstacle present in the projection optical path is detected for all of the plurality of projectors based on the detection result by the detection unit. In a control mode in which some or all of the plurality of projectors simultaneously project images, the projection of images by the plurality of projectors is controlled.
The projection system according to any one of claims 2 to 4. The control unit controls the projection of images by the plurality of projectors in a control mode in which all of the projection ranges of the plurality of projectors include the position of the obstacle detected by the detection unit.
The projection system according to claim 1. The detection unit is mounted on each of the plurality of projectors,
Each of the detection units detects the obstacle present in the projection optical path of the projector on which the detection unit is mounted.
The projection system according to any one of claims 1 to 6. A plurality of the projection surfaces;
The plurality of projectors are provided for each of the projection surfaces.
The projection system according to any one of claims 1 to 7. Three projectors are arranged for each of the apexes of the room.
The projection system according to any one of claims 1 to 8. Two projectors are arranged for each side of the room.
The projection system according to any one of claims 1 to 9. A method for controlling a projection system comprising a plurality of projectors for projecting images on a projection surface,
The plurality of projectors are arranged at positions where projection optical paths can be different with respect to one projection plane,
The detection unit detects an obstacle on the projection surface,
A control unit controls projection of images by the plurality of projectors based on a detection result by the detection unit;
Projection system control method.

Images