JP2013122501A - Projection type video display device, projection type video display system, and electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a projection video image uncomfortable to view from being displayed in a projection type video display system 500 in which respective projection type video display devices 100 project a common video image.SOLUTION: A projection unit projects a video image common to that of other projection type video display devices. A control unit reflects detected interactive operation to other projection type video display devices when having priority, and does not reflect detected interactive operation to other projection type video display devices when not having priority.

Description

  The present invention relates to a projection-type video display device that can be connected to a network, a projection-type video display system, and an electronic device with enhanced security.

  In recent years, a projection display apparatus equipped with an interactive function has been put into practical use. The interactive operation is an intuitive operation, which reduces the work of the user who makes a presentation or class using the projected image, and can expect a smooth and enriched presentation or class.

  As an example of an interactive system, a system in which a scanning element and a camera are synchronized has been proposed. In the system, the pixel position drawn by the scanning element is constantly monitored, and the position of the object is specified from the pixel position at the moment when the object has entered and captured the reflected light (see, for example, Patent Document 1). .

JP 2010-243576 A

  By the way, the present inventor is developing a system (hereinafter referred to as a projection video display system) in which a plurality of projection video display devices are connected to a network, and each projection video display device projects a common video. In this projection image display system, the images projected by the respective projection image display devices are shared, so that if the image of a certain projection image display device is changed, other projection image display devices are also changed. The change is reflected.

  In a projection video display system, when a plurality of projection video display devices are used by different users, there is a possibility that operations of the respective users may occur simultaneously. When using a projection display apparatus equipped with an interactive function, interactive operations by a plurality of users may occur simultaneously on a plurality of projection images projected by the plurality of projection display apparatuses.

  However, if all the operations input at the same time are reflected on the projected image in real time, phenomena based on different operation intentions occur simultaneously in the projected image. Users are often shown uncomfortable images that appear unnatural or suddenly change.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a projection video display system in which a plurality of projection video display devices are connected to a network, and each projection video display device projects a common video image. It is an object of the present invention to provide a technique for suppressing the display of an uncomfortable projected image.

  A projection image display device according to an aspect of the present invention is a projection image display device connected to another projection image display device via a network, and detects a projection unit that projects an image on a projection surface and an interactive operation. And a control unit that transmits instruction information for reflecting the detected interactive operation to another projection display apparatus via the communication unit. The projection unit projects images common to other projection display devices, and if the control unit has priority, the detected interactive operation is reflected on other projection display devices and has priority. If not, the detected interactive operation is not reflected on other projection display apparatuses.

  Another aspect of the present invention is a projection display system. This projection video display system is a projection video display system including a plurality of projection video display devices connected by a network, and each projection video display device includes a projection unit that projects an image on a projection surface, and A detection unit that detects an interactive operation, and a control unit that sends instruction information for reflecting the detected interactive operation to another projection display apparatus via the communication unit. Multiple projection video display devices project a common video, and among the multiple projection video display devices, a projection video display device with priority has its own interactive operation reflected on other projection video display devices. The projection display apparatus without priority does not reflect the interactive operation on itself to other projection display apparatuses.

  Yet another embodiment of the present invention is an electronic device. This electronic device is an electronic device including an installation table having a recess or a projection, and a housing having a projection or a recess to be fitted to the recess or projection of the installation table, the recess or projection of the installation table. And a detection unit that detects a fitting state of the convex portion or the concave portion of the housing, and a control unit that restricts or permits the use of the electronic device according to the detected fitting state.

  According to the present invention, in a projection type video display system in which a plurality of projection type video display devices are connected to a network and each projection type video display device projects a common video, it is possible to display an uncomfortable projection video. Can be suppressed.

It is a figure which shows a projection type video display apparatus (floor surface projection). It is a figure which shows a projection type video display apparatus (wall surface projection). It is a figure which shows the optical structure of a projection type video display apparatus. It is a perspective view which shows the projection type video display apparatus with an interactive function. It is a side view which shows the projection type video display apparatus with an interactive function. 1 is a diagram illustrating a configuration of a projection display apparatus including a projection display apparatus according to Embodiment 1. FIG. 3 is a diagram showing functional blocks of the projection display apparatus according to Embodiment 1. FIG. It is a figure which shows the functional block of the information processing apparatus contained in a projection type video display system. It is a figure which shows the example of a screen transition of the 1st projection type video display apparatus concerning Embodiment 1, a 2nd projection type video display apparatus, and a 3rd projection type video display apparatus. 5 is a flowchart for explaining the operation of the projection display system according to the first embodiment. It is a figure which shows the example of a screen transition of the 1st projection type video display apparatus which concerns on the modification of Embodiment 1, a 2nd projection type video display apparatus, and a 3rd projection type video display apparatus. 6 is a flowchart for explaining an operation of a projection display system according to a modification of the first embodiment. FIG. 5 is a perspective view showing a projection display apparatus according to Embodiment 2. 10 is a front view showing a projection display apparatus (separated state) according to Embodiment 2. FIG. It is a front view which shows the projection type video display apparatus (fitting state) which concerns on Embodiment 2. FIG. 6 is a diagram showing functional blocks of a projection display apparatus according to Embodiment 2. FIG. 10 is a flowchart for explaining the operation of the projection display apparatus according to the second embodiment. FIG. 10 is a partial view showing a convex portion of a projection display apparatus according to a first modification of the second embodiment. FIG. 10 is a diagram showing an installation stand according to a second modification of the second embodiment.

  Hereinafter, a projection display apparatus according to an embodiment of the present invention will be described with reference to the drawings. In the description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. It should also be noted that the drawings include parts having different dimensional relationships and ratios.

(Schematic configuration of the projection display device)
Hereinafter, the schematic configuration of the projection display apparatus will be described with reference to the drawings. This schematic configuration is common to several embodiments described below. FIG. 1 is a diagram showing a projection display apparatus 100 (floor surface projection). FIG. 2 is a diagram showing the projection display apparatus 100 (wall surface projection).

  As shown in FIGS. 1 and 2, the projection display apparatus 100 has a housing 200 and projects an image on a projection surface. The housing 200 is provided with a projection port 210 through which light emitted from a projection optical system 110 described later passes. The projection port 210 may be configured by a glass window.

  The projection plane may be formed on a horizontal plane as shown in FIG. 1, or may be formed on a vertical plane as shown in FIG. When formed on a horizontal plane, it is formed on a floor, a desk, a screen, a white board, and the like. When formed on a vertical surface, it is formed on a wall surface, a screen, a whiteboard or the like. The projection display apparatus 100 may be disposed so as to project image light onto a horizontal plane, or may be disposed so as to project onto a vertical plane.

  Of the surfaces of the substantially rectangular parallelepiped casing 200, the first surface 220 is an installation surface (that is, the bottom surface) in the case shown in FIG. 1, and the second surface 230 is the installation surface in the case shown in FIG.

  The projection display apparatus 100 is configured in a small size, and the projection display apparatus 100 displays an image of about 20 to 40 inches on the projection surface. For example, an A3 size video is displayed. The projection display apparatus 100 is a so-called ultra-short focus type that is very close to the projection surface.

(Optical configuration of the projection display)
Hereinafter, the optical configuration of the projection display apparatus 100 will be described with reference to the drawings. FIG. 3 is a diagram illustrating an optical configuration of the projection display apparatus 100.

  As shown in FIG. 3, the projection display apparatus 100 includes a projection optical system 110, an illumination optical system 120, a DMD (Digital Micromirror Device) 70, a reflecting prism 80, a cooling fan 130, a battery 140, a power supply board 150, a main control board. 160 and an operation board 170.

  The projection optical system 110 projects image light emitted from the DMD 70 that is a light modulation element onto a projection surface. In this embodiment, since a color image is projected, the image light has a color component. The projection optical system 110 includes a projection lens group 111 and a reflection mirror 112. The projection lens group 111 emits the color component light emitted from the DMD 70 to the reflection mirror 112 side.

  The projection lens group 111 includes substantially circular and substantially semicircular lenses centered on the optical axis L of the projection optical system 110. It should be noted that the diameter of the lens included in the projection lens group 111 is larger as it is closer to the reflection mirror 112.

  The reflection mirror 112 reflects the image light emitted from the projection lens group 111. The reflection mirror 112 condenses the image light and widens the image light. For example, the reflection mirror 112 is an aspherical mirror having a concave surface on the projection lens group 111 side, and has a substantially semicircular shape centered on the optical axis L of the projection optical system 110.

  The image light collected by the reflection mirror 112 is guided to the outside from a projection port 210 provided in the housing 200. The projection port 210 provided in the housing 200 is preferably provided in the vicinity of the position where the image light is collected by the reflection mirror 112.

  The illumination optical system 120 includes a light source 10, a dichroic prism 30, a rod integrator 40, a first mirror 51, a second mirror 52, a first lens 61, a second lens 62, and a third lens 63.

  The light source 10 is configured to individually emit a plurality of color component lights. The light source 10 may be provided with a heat sink that dissipates heat generated by the light source 10. In FIG. 3, the light source 10 includes a red light source 10R, a green light source 10G, and a blue light source 10B.

  The red light source 10R is a light source that emits red component light R. For example, a red LED (Light Emitting Diode) or a red LD (Laser Diode) can be used as the red light source 10R. The green light source 10G is a light source that emits green component light G. For example, a green LED or a green LD can be used as the green light source 10G. The blue light source 10B is a light source that emits blue component light B. For the blue light source 10B, for example, a blue LED or a blue LD can be used. Each of the red light source 10 </ b> R, the green light source 10 </ b> G, and the blue light source 10 </ b> B may be provided with a heat sink made of a member having good heat dissipation such as metal.

  The dichroic prism 30 combines the red component light R emitted from the red light source 10R, the green component light G emitted from the green light source 10G, and the blue component light B emitted from the blue light source 10B.

  The rod integrator 40 has a light incident surface, a light emitting surface, and a light reflecting side surface provided from the outer periphery of the light incident surface to the outer periphery of the light emitting surface. The rod integrator 40 makes the color component light emitted from the dichroic prism 30 uniform. More specifically, the rod integrator 40 makes the color component light uniform by reflecting the color component light on the light reflection side surface. The rod integrator 40 may be a solid rod made of glass or the like, or a hollow rod whose inner surface is constituted by a mirror surface.

  In the example illustrated in FIG. 3, the rod integrator 40 has a tapered shape in which a cross section perpendicular to the light traveling direction increases toward the traveling direction of the light emitted from the light source 10. The rod integrator 40 may have an inversely tapered shape in which the cross section perpendicular to the light traveling direction becomes smaller toward the traveling direction of the light emitted from the light source 10.

  The first mirror 51 and the second mirror 52 are reflection mirrors that bend the optical path in order to guide the light emitted from the rod integrator 40 to the DMD 70. The first lens 61, the second lens 62, and the third lens 63 are relay lenses that form an image of the color component light on the DMD 70 while suppressing the expansion of the color component light emitted from the light source 10.

  The cooling fan 130 communicates with the outside of the housing 200 and releases heat in the housing 200. Alternatively, air outside the housing 200 is sent into the housing 200. Or do both. The cooling fan 130 is provided in the vicinity of the light source 10 and cools the light source 10.

  The battery 140 stores electric power used in the projection display apparatus 100. The power supply board 150 includes an AC-DC converter, and the AC-DC converter converts AC power supplied from a commercial power source into DC power. The AC-DC converter stores the converted DC power in the battery 140 or supplies it to various circuits in the projection display apparatus 100. When the power supply board 150 and the commercial power supply are not connected, the power stored in the battery 140 is supplied to various circuits. In addition, it is good also as a structure which does not mount the battery 140 from a viewpoint of size reduction and weight reduction.

  The main control board 160 is equipped with a control circuit that controls the operation of the projection display apparatus 100. The operation board 170 is connected to an operation unit installed in the projection display apparatus 100. The control circuit mounted on the operation board 170 transmits an operation signal input from the operation unit to the control circuit mounted on the main control board 160.

  DMD 70 is composed of a plurality of micromirrors. The plurality of micromirrors are independently movable. In principle, one micromirror corresponds to one pixel. The DMD 70 changes the angle of each micromirror according to the set video signal. Thereby, it is possible to switch whether or not the color component light is reflected to the projection optical system 110 side for each display pixel. Note that gradation control is possible by controlling the time of reflection to the projection optical system 110 side.

  Although FIG. 3 shows an example in which a DMD is used as the light modulation element, a reflective or transmissive liquid crystal panel may be used instead of the DMD.

  The reflecting prism 80 transmits the light emitted from the illumination optical system 120 to the DMD 70 side, and reflects the light emitted from the DMD 70 to the projection optical system 110 side.

[Embodiment 1]
Hereinafter, the projection display apparatus 100 according to the first embodiment will be described. In the first embodiment, an interactive function is used.

(Interactive function of projection display)
FIG. 4 is a perspective view showing the projection display 100 with an interactive function. FIG. 5 is a side view showing the projection display 100 with an interactive function. The projection display apparatus 100 shown in FIGS. 4 and 5 includes a camera 280 and an infrared irradiation unit 290.

  The infrared irradiation unit 290 is installed on the surface of the housing 200 where the projection port 210 is installed. The infrared irradiation unit 290 is installed at a position opposite to the position where the projection port 210 is installed on the surface thereof. The infrared irradiation unit 290 includes a light source such as an infrared LED, and irradiates infrared rays so that an infrared film is formed on the surface of the projection surface.

  The camera 280 is installed in the vicinity of the projection port 210. 4 and 5 illustrate an example in which the camera 280 is installed on the surface of the housing 200 on which the projection port 210 is installed. However, the camera 280 may be installed inside the projection port 210, that is, inside the housing 200. Good. Note that a camera with a narrow angle of view can be used because it is possible to shoot a wide range if the shooting distance is longer than the projection distance. Using a camera with a narrow angle of view leads to cost reduction.

  The camera 280 is a camera having sensitivity to at least infrared rays. The camera may be a dedicated infrared camera or a camera having sensitivity to both visible light and infrared light. The user can perform an interactive operation by moving the indicator 300 on the projection surface. The indicator 300 may be any member that can reflect infrared rays, and corresponds to a human hand (for example, a fingertip), a pen, an indicator stick, and the like. 4 and 5, since the infrared irradiation unit 290 is installed in the projection display apparatus 100, the indicator 300 does not need to emit light.

  The image analysis unit to be described later detects a position or a region having a different infrared reflectance in an image taken by the camera 280. The positional relationship between the projection optical system 110 and the camera 280 is fixed, and the distance between the projection surface and the projection surface is also fixed in the floor projection. Therefore, the position or area in the photographed image is uniquely associated with the position or area of the projected image, and the control unit described later can specify what kind of operation the user has performed.

  By using the interactive system described above, the user does not need to use an electronic device such as an electronic pen that irradiates infrared rays, and can operate with a natural feeling as if operating the touch panel. Further, since it is not necessary to use a high-spec camera 280, it can be realized at a relatively low cost. In recent years, LED lighting has become widespread, and since the amount of infrared rays in the room has decreased, the false detection rate has also decreased.

  This interactive system is an example, and the present invention is not limited to this system. For example, an electronic device such as an electronic pen that emits infrared rays may be used as the indicator 300, and the infrared irradiation unit 290 may not be installed in the projection display apparatus 100. Moreover, you may detect the motion of the indicator 300 from the visible light image image | photographed with the camera 280, without using infrared rays. In this case, in order to maintain detection accuracy, it is necessary to use a high-resolution camera. Two cameras may be installed. In this case, since the parallax image can be acquired, the movement of the indicator can be detected in three dimensions, and the imaging range becomes wider. Further, a distance measuring sensor using a triangulation method, which is often used in autofocus control, may be installed in the projection display apparatus 100.

  FIG. 6 is a diagram showing a configuration of a projection display apparatus 500 including the projection display apparatus 100 according to the first embodiment. The projection display system 500 shown in FIG. 6 includes a first projection display apparatus 100a, a second projection display apparatus 100b, a third projection display apparatus 100c, and an information processing apparatus 400. They are connected by a network 600. The information processing apparatus 400 is a computer, and corresponds to a notebook PC, a tablet PC, a smartphone, or the like. Note that the numbers of the projection display apparatus 100 and the information processing apparatus 400 connected to the network 600 are not limited to the numbers shown in FIG.

  The network 600 is constructed by, for example, a wired or wireless LAN. This LAN may be connected to the Internet. Hereinafter, the information processing apparatus 400 is a host, and the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c are clients.

  The first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c project a common image on the projection surface. The information processing apparatus 400 also displays the common video on its own display device. That is, all devices connected to the network 600 display a common video.

  Hereinafter, an example in which the projection display system 500 is used for a small group discussion will be described. For example, it is assumed that a presenter uses the information processing apparatus 400 and other members use the projection display apparatus 100 in a meeting. The projection display apparatus 100 projects the floor as shown in FIG. In this example, projection is performed on a desk in front of each member. Since this projected image is displayed on the surface of the desk and there is no thickness on the display surface, each member can proceed with the group discussion as if the paper is placed on the desk.

  FIG. 7 is a diagram showing functional blocks of the projection display apparatus 100 according to the first embodiment. The projection display apparatus 100 according to Embodiment 1 includes a light source 10, a light modulation unit 70a, a projection unit 110a, an imaging unit 280a, a control unit 161, an image analysis unit 162, a video processing unit 163, a communication unit 164, and a temporary storage. A unit 165 and a recording medium 166.

  Each configuration of the control unit 161, the image analysis unit 162, and the video processing unit 163 can be realized by an arbitrary processor, memory, or other LSI in terms of hardware, and a program loaded in the memory in terms of software, etc. Here, functional blocks realized by their cooperation are depicted. Accordingly, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.

  The light modulation unit 70 a modulates the light from the light source 10 based on the video signal set by the video processing unit 163. The projection unit 110a projects the image light generated by the light modulation unit 70a onto the projection plane. The imaging unit 280a images the projection plane. More specifically, the display area of the projected image on the projection plane is imaged. The display area and the imaging area do not necessarily coincide with each other, and there may be a shift between them. In order to capture an area close to the projection display apparatus 100 in the display area, it is necessary to use a camera with a wide angle of view. In order to reduce costs, a camera with a narrow angle of view may be used, and an area close to the projection display apparatus 100 may be excluded from the imaging range.

  The image analysis unit 162 analyzes the image captured by the imaging unit 280a. Specifically, a change in coordinates in which the infrared reflectance differs from the set value by more than a set value is detected from the image. The image analysis unit 162 supplies the analysis result to the control unit 161.

  The communication unit 164 is connected to the network 600 and transmits / receives information to / from the information processing apparatus 400. The communication unit 164 transmits / receives information to / from the other projection display apparatus 100 via the information processing apparatus 400 or directly. In the present embodiment, the video signal that is the basis of the projection image is transmitted from the information processing apparatus 400 via the network 600 to the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display. It is supplied to the apparatus 100c. Accordingly, the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c can project a synchronized common image.

  The temporary storage unit 165 includes a volatile memory and is used as a work area. The recording medium 166 is a nonvolatile built-in memory and / or a removable memory that can be detached. For example, a flash memory, a hard disk, and an optical disk are applicable. The video signal that is the basis of the projected video is not limited to the example of being taken into the control unit 161 from the information processing apparatus 400 connected to the network 600 via the communication unit 164, but may be taken from a removable memory.

  The video processing unit 163 performs predetermined processing on the video signal supplied from the communication unit 164 or the recording medium 166 and sets the video signal in the light modulation unit 70a. The control unit 161 controls the entire projection display apparatus 100. In the present embodiment, the control unit 161 detects an interactive operation from the analysis result of the image analysis unit 162. Specifically, an interactive operation is detected according to a change in coordinates where the infrared reflectance in the image differs by a set value or more.

  For example, when a movement in which the feature region approaches a coordinate corresponding to the position of the confirmation key in the projected image in the captured image, it can be determined that the confirmation key has been tapped. Here, the characteristic region refers to a region having an infrared reflectance that is equal to or greater than a set value and different from the surrounding region. In addition, when a movement in which the feature area approaches the coordinates corresponding to the position of the hyperlink in the projected image in the captured image, it can be determined that a jump operation to the link page has been performed. Further, when the feature region moves so as to draw a character in the captured image, it can be determined that a character is input.

  The control unit 161 identifies the image projected at the imaging time, and detects the interactive operation by associating the image content with the analysis result by the image analysis unit 162. As described above, the detection of the interactive operation is realized by the imaging unit 280a, the image analysis unit 162, and the control unit 161. The control unit 161 sends instruction information for reflecting the detected interactive operation to the other projection display apparatus 100 and the information processing apparatus 400 to the network 600 via the communication unit 164.

  The video processing unit 163 updates the video projected from the projection unit 110a according to the detected interactive operation or instruction information from the information processing apparatus 400 or another projection video display apparatus 100. The video processing unit 163 may update or change the projected video by processing or changing the video signal for reflecting the interactive operation, or may be processed or changed by the information processing device 400 or another projection video display device 100. The projected image may be updated by receiving the received image signal. When an interactive operation is performed on the own projection display apparatus 100, the control unit 161 may instruct the video processing unit 163 to process or change the video signal for reflecting the interactive operation, or the information processing apparatus. 400 may be requested.

  FIG. 8 is a diagram illustrating functional blocks of the information processing apparatus 400 included in the projection display system 500. The information processing apparatus 400 includes a control unit 410, an operation unit 420, a display unit 430, a communication unit 440, a temporary storage unit 450, a recording medium 460, and a video processing unit 470.

  The operation unit 420 includes general input devices such as a keyboard, a mouse, and a touch panel. The operation unit 420 outputs an operation signal corresponding to the user operation to the control unit 410. The display unit 430 includes a liquid crystal display or an organic EL display, and displays a common image in the projection display system 500.

  The communication unit 440 is connected to the network 600 and transmits / receives information to / from each of the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c. The communication unit 440 generates a video signal that is a base of the video that is commonly displayed in the projection video display system 500, and displays the first projection video display device 100a, the second projection video display device 100b, and the third projection video display. It supplies to the apparatus 100c. The temporary storage unit 450 is composed of a volatile memory and is used as a work area. The recording medium 460 is a nonvolatile built-in memory and / or a removable memory that can be detached.

  The control unit 410 controls the information processing apparatus 400 as a whole and also controls the projection display system 500. Upon receiving instruction information for reflecting the interactive operation from the control unit 161 of the projection display apparatus 100, the control unit 410 causes the video processing unit 470 to process or change the video signal for reflecting the interactive operation. Let it run.

  The control unit 410 controls priority of the projection display system 500 to control the entire projection display system 500. The priority is a right that enables effective operation on the entire projection display system 500. In the present embodiment, the priority is held in any of the information processing apparatus 400, the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c. That is, the priority is held by one device in the projection display system 500. Note that a state in which all devices do not have priority is also generated.

  In the initial state, any of the information processing apparatus 400, the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c may be set to have no priority. The setting may be such that the device 400 has priority. When the information processing apparatus 400 has priority, the control unit 410 of the information processing apparatus 400 determines its own priority when it does not detect an operation on the information processing apparatus 400 for a certain period (for example, 5 seconds). To lose. The control unit 410 notifies the loss of priority to the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c via the network 600.

  In a state where none of the first projection display apparatus 100a, the second projection display apparatus 100b, the third projection display apparatus 100c, and the information processing apparatus 400 connected to the network 600 has priority, Each control unit 161 of the 1-projection video display device 100a, the second projection-type video display device 100b, and the third projection-type video display device 100c executes an interactive operation detection process for the own projection-type video display device 100. . When each control unit 161 detects an interactive operation on its own projection display apparatus 100, the control unit 161 notifies the information processing apparatus 400 of the detection via the network 600.

  The control unit 410 of the information processing apparatus 400 gives priority to the projection display apparatus 100 that has detected the interactive operation, and assigns the priority to the first projection display apparatus 100a and the second projection display via the network 600. The video display device 100b and the third projection video display device 100c are notified. When an interactive operation detection notification is received from a plurality of projection display apparatuses 100, the control unit 410 of the information processing apparatus 400 gives priority to the projection display apparatus 100 with the earliest interactive operation detection time. To do.

  That is, when there is no device having priority in the projection display system 500, the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c are the first ones. The projection display apparatus 100 that has detected the interactive operation acquires the priority right. When the control unit 410 of the information processing apparatus 400 detects an operation before the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c, the information processing is performed again. The device 400 will obtain priority.

  The control unit 161 of the projection display apparatus 100 that has detected the interactive operation first loses the possessed priority if it does not detect the next interactive operation for a certain period after acquiring the priority. The control unit 161 notifies the information processing apparatus 400 via the network 600 of the loss of priority. The control unit 410 of the information processing apparatus 400 notifies the other projection display apparatus 100 via the network 600 of the notified priority loss.

  The control unit 161 of the projection display apparatus 100 having the priority right reflects the interactive operation on itself in the other projection display apparatuses 100 and the information processing apparatus 400 in real time. The control unit 410 of the information processing apparatus 400 having the priority right reflects the operation for itself on the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c in real time.

  The control unit 161 of the projection display apparatus 100 that does not have priority does not reflect the interactive operation on itself to the other projection display apparatuses 100 and the information processing apparatus 400. The control unit 161 of the projection display apparatus 100 that does not have the priority right restricts or disables the interactive operation on itself. For example, data input by interactive operation may be invalidated. The interactive operation for the projection display apparatus 100 without priority is not reflected in the own projection display apparatus 100.

  The control unit 410 of the information processing apparatus 400 that does not have priority does not reflect the operation for itself on the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c. The control unit 410 of the information processing apparatus 400 that does not have the priority right restricts or disables the operation on itself. This operation is not reflected on the information processing apparatus 400 itself.

  FIG. 9 is a diagram illustrating a screen transition example of the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c according to the first embodiment. At time T1, “AAAAAA” is displayed on the respective screens of the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c. At time T1, the first projection display apparatus 100a has priority. Therefore, the interactive operation for the first projection display apparatus 100a is effective, but the interactive operation for the second projection display apparatus 100b and the third projection display apparatus 100c is invalid.

  At time T2, the user of the first projection display apparatus 100a inputs “BBBBB” on the screen by interactive operation. Since the first projection display apparatus 100a has priority, the input is valid. The inputs are the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus. This is reflected in all of the devices 100c. At time T3, “AAAAAA” and “BBBBB” are displayed on the respective screens of the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c.

  FIG. 10 is a flowchart for explaining the operation of the projection display system 500 according to the first embodiment. In a state where none of the projection display systems 500 has priority, the control unit 161 of the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c An interactive operation is detected (S10). The control unit 161 that has detected the interactive operation notifies the information processing apparatus 400 via the network 600. Upon receiving the notification, the control unit 410 of the information processing apparatus 400 specifies the earliest interactive operation (S12). The control unit 410 gives priority to the projection display apparatus 100 (denoted as a projector in FIG. 10) that has detected the specified interactive operation (S14).

  The control unit 161 of the projection display apparatus 100 having the priority right waits for the next interactive operation (S16). The control unit 161 determines whether or not an interactive operation has been performed within a certain time after obtaining the priority (S22). When an interactive operation is performed (N in S22), the count time is reset, and a further interactive operation is waited for (S16). When the interactive operation is not desired (Y in S22), the control unit 161 loses the priority (S24). The control unit 161 notifies the information processing apparatus 400 of the loss of priority via the network 600. The control unit 410 of the information processing apparatus 400 notifies the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c of the loss of priority via the network 600. .

  The processes from step S10 to step S24 described above are repeatedly executed (N in S28) until the operation of the projection display system 500 is completed (Y in S28).

[Modification of Embodiment 1]
Hereinafter, a projection display apparatus 100 according to a modification of the first embodiment will be described. In the basic example of the first embodiment, the interactive operation on the projection display apparatus 100 that does not have priority is invalidated. In the modification of the first embodiment, the interactive operation on the projection display apparatus 100 that does not have the priority is not invalidated, and the timing of reflection on the other projection display apparatuses 100 is delayed.

  Hereinafter, the operation of a modified example different from the basic example will be described with reference to FIG. In the projection display apparatus 100 having no priority, the control unit 161 supplies instruction information for reflecting an interactive operation on the projection display apparatus 100 to the image processing unit 163 and a temporary storage unit 165. To remember. The temporary storage unit 165 temporarily stores the interactive operation detected by the control unit 161.

  The video processing unit 163 updates the video projected from the projection unit 110a in accordance with the instruction information from the control unit 161. In the present modification, the projected image can be changed even without priority. When acquiring the priority, the control unit 161 notifies the information processing apparatus 400 of the instruction information stored in the temporary storage unit 165 via the network 600. In addition, you may notify the said instruction information on condition of confirmation operation of user operation. For example, a “Send” button may be displayed on the projection screen, and the instruction information may be notified on the condition that the button is touched.

  In order to acquire this priority, when the control unit 161 of the projection display apparatus 100 that does not have the priority also detects an interactive operation on the projection display apparatus 100 of its own, information indicating the fact of the detection is obtained. The information processing apparatus 400 is notified via the network 600. The control unit 410 of the information processing device 400 specifies the projection video display device 100 to which the next priority is given according to the information from the projection video display device 100 that has no priority. When the information is received from a plurality of information processing apparatuses 400, the information is specified to the projection display apparatus 100 received first.

  FIG. 11 is a diagram illustrating a screen transition example of the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c according to the modification of the first embodiment. At time T1, “AAAAAA” is displayed on the respective screens of the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c. At time T1, the first projection display apparatus 100a has priority. In this modification, the interactive operation for each of the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c is effective, but the first projection display image having priority. Only the interactive operation on the display device 100a is reflected on the other projection display devices 100 in real time. An interactive operation on the second projection display apparatus 100b or the third projection display apparatus 100c having no priority is not reflected in real time on the other projection display apparatuses 100. Reflected with a time difference.

  At time T2, the user of the second projection display apparatus 100b inputs “BBBBB” on the screen by interactive operation. Since the second projection display apparatus 100b does not have priority, the input is not reflected on other projection display apparatuses 100 until the second projection display apparatus 100b acquires the priority. At time T3, “AAAAAA” and “BBBBB” are displayed on the screen of the second projection display apparatus 100b, but each of the screens of the first projection display apparatus 100a and the third projection display apparatus 100c. Displays only "AAAAA".

  The second projection display apparatus 100b acquires priority between time T3 and time T4. When the second projection display apparatus 100b obtains priority, the interactive operation on the second projection display apparatus 100b is reflected on the first projection display apparatus 100a and the third projection display apparatus 100c. At time T4, “AAAAAA” and “BBBBB” are displayed on the respective screens of the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c.

  FIG. 12 is a flowchart for explaining the operation of the projection display system 500 according to the modification of the first embodiment. In a state where none of the projection display systems 500 has priority, the control unit 161 of the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c An interactive operation is detected (S10). The control unit 161 that has detected the interactive operation notifies the information processing apparatus 400 via the network 600. Upon receiving the notification, the control unit 410 of the information processing apparatus 400 specifies the earliest interactive operation (S12). The control unit 410 gives priority to the projection display apparatus 100 (denoted as a projector in FIG. 12) that has detected the specified interactive operation (S14).

  The control unit 161 of the projection display apparatus 100 having the priority right waits for the next interactive operation (S16). The control unit 161 of the projection display apparatus 100 that does not have priority also waits for an interactive operation (S18). When an interactive operation is performed on the projection display apparatus 100 that does not have priority, the control unit 161 of the projection display apparatus 100 stores instruction information for reflecting the interactive operation in the temporary storage unit 165. (S20), and communicates with the information processing apparatus 400 to acquire the next priority reservation (S21).

  The control unit 161 of the projection display apparatus 100 having the priority right determines whether or not an interactive operation has been performed within a certain time after the priority right is acquired (S22). When an interactive operation is performed (N in S22), the count time is reset, and a further interactive operation is waited for (S16). When the interactive operation is not performed (Y in S22), the control unit 161 loses the priority (S24).

  The control unit 161 notifies the information processing apparatus 400 of the loss of priority via the network 600. The control unit 410 of the information processing apparatus 400 executes the reservation of the assigned priority, and gives the priority to the projection display apparatus 100 that has been given the reservation (S25). The control unit 410 of the information processing apparatus 400 notifies the first projection display apparatus 100a, the second projection display apparatus 100b, and the third projection display apparatus 100c via the network 600 of the priority. . The control unit 161 of the projection display apparatus 100 that has acquired the priority right notifies the information processing apparatus 400 via the network 600 of instruction information for reflecting the interactive operation stored in the temporary storage unit 165 ( S26).

  The processes from step S10 to step S26 described above are repeatedly executed (N in S28) until the operation of the projection display system 500 is completed (Y in S28).

  As described above, according to the first embodiment, in the projection image display system 500 in which each projection image display device 100 projects a common image, the projection image display device 100 or the information processing device having priority. Since only 400 has the right to process or change the image, it is possible to suppress the display of a projected image with an uncomfortable feeling. That is, it is possible to suppress the occurrence of phenomena based on different operation intentions on the screen at the same time. Therefore, the user does not see an uncomfortable image that changes unnaturally or suddenly. Further, simultaneous occurrence of contradictory operations such as touching the “OK” button and the “NG” button at the same time can be suppressed. Therefore, the operation of the projection display system 500 is stabilized. In addition, according to the modification, since it is possible to reserve in advance that the interactive operation is reflected on another device, it is possible to suppress a situation in which the same interactive operation is repeated in order to obtain priority.

  The projection display system 500 can always share the same information among the plurality of projection display apparatuses 100 and the information processing apparatus 400. In addition, the operational feeling of interactive operation is high. Therefore, by using the projection display system 500 for presentations, classes, conferences, seminars, discussions, etc., it can be expected that the efficiency and productivity of those systems can be improved.

[Embodiment 2]
Hereinafter, the projection display apparatus 100 according to the second embodiment will be described. The second embodiment relates to a security system using an installation table.

  FIG. 13 is a perspective view showing a projection display apparatus 100 according to the second embodiment. The projection display apparatus 100 according to the second embodiment is used by being installed on the installation table 800. The installation base 800 has a concave portion or a convex portion. The housing 200 of the projection display apparatus 100 has a convex portion or a concave portion to be fitted with the concave portion or the convex portion of the installation table 800. Hereinafter, an example will be described in which the installation base 800 has a concave portion, and the housing 200 of the projection display apparatus 100 has a convex portion to be fitted to the concave portion of the installation base 800.

  A projection is provided on the bottom surface of the housing 200 of the projection display apparatus 100. The convex portion is formed by a movable leg member 710. In FIG. 13, four leg members 710 (first leg member 710 a, second leg member 710 b, third leg member 710 c, and fourth leg member 710 d) are attached to the bottom surface of the housing 200. The leg member 710 is inserted into a groove formed on the bottom surface of the housing 200. This groove serves as a guide for regulating the movement of the leg member 710. One end of the spring 720 is attached to the opposite side of the leg member 710 from the exposed side, and the piezoelectric element 730 is attached to the other end of the spring 720. The piezoelectric element 730 is fixed at a predetermined position in the housing 200. The spring 720 is an example of an elastic member, and rubber may be used instead of the spring 720.

  In the example shown in FIG. 13, the leg member 710 is partially exposed outside the housing 200 at normal times. When pressure is applied to the leg member 710 from the outside of the casing 200 in the direction of the casing 200, the spring 720 contracts and the leg member 710 is accommodated in the groove. Therefore, when the projection display apparatus 100 is installed on the installation table 800, the entire bottom surface of the housing 200 is in contact with the installation table 800. As described above, the leg member 710 functions as a movable contact member to be brought into contact with the installation base 800.

  A recess is provided on the upper surface of the installation table 800. In FIG. 13, four groove portions 810 (first groove portion 810a, second groove portion 810b, third groove portion 810c, and fourth groove portion 810d) are formed on the upper surface. The first leg member 710a, the second leg member 710b, the third leg member 710c, and the fourth leg member 710d of the housing 200 are the first groove portion 810a, the second groove portion 810b, the third groove portion 810c, and the The four grooves 810d are fitted.

  FIG. 14 is a front view showing the projection display apparatus 100 (separated state) according to the second embodiment. FIG. 15 is a front view showing the projection display apparatus 100 (fitted state) according to the second embodiment. As shown in FIGS. 14 and 15, the first groove 810a and the second groove 810b have different depths. Note that the depths of the four grooves 810 (not shown) may all be different.

  The first piezoelectric element 730a receives the pressure received when the first leg member 710a is fitted into the first groove 810a of the installation base 800 via the first spring 720a. The first piezoelectric element 730a generates an electrical signal corresponding to the pressure and outputs the electrical signal to a control unit described later. Similarly, the second piezoelectric element 730b receives the pressure received when the second leg member 710b is fitted into the second groove 810b of the installation base 800 via the second spring 720b. The second piezoelectric element 730b generates an electrical signal corresponding to the pressure and outputs the electrical signal to a control unit described later. Here, since the depths of the first groove portion 810a and the second groove portion 810b are different, the pressure received by the first piezoelectric element 730a and the second piezoelectric element 730b is different. Accordingly, the output values of the first piezoelectric element 730a and the second piezoelectric element 730b are also different. Thus, the piezoelectric element 730 functions as an element for detecting the fitting state between the leg member 710 and the groove 810.

  FIG. 16 is a diagram showing functional blocks of the projection display apparatus 100 according to the second embodiment. The projection display apparatus 100 according to the second embodiment includes a light source 10, a light modulation unit 70a, a projection unit 110a, a piezoelectric element 730, a control unit 161, a video processing unit 163, a communication unit 164, a temporary storage unit 165, and a recording medium. 166 and a security table 167.

  The light modulation unit 70 a modulates the light from the light source 10 based on the video signal set by the video processing unit 163. The projection unit 110a projects the image light generated by the light modulation unit 70a onto the projection plane.

  The communication unit 164 is connected to a network and transmits / receives information to / from the information processing apparatus. This information processing apparatus may be a PC or a server. For example, a cloud server installed in a data center may be used. The temporary storage unit 165 includes a volatile memory and is used as a work area. The recording medium 166 is a nonvolatile built-in memory and / or a removable memory that can be detached. The video signal that is the basis of the projected video may be taken into the control unit 161 from the information processing apparatus connected to the network via the communication unit 164 or may be taken from the recording medium 166. The video processing unit 163 performs predetermined processing on the video signal supplied from the communication unit 164 or the recording medium 166 and sets the video signal in the light modulation unit 70a.

  The control unit 161 controls the entire projection display apparatus 100. In the present embodiment, the controller 161 restricts or permits the use of some or all functions of the projection display apparatus 100 according to the output value of the piezoelectric element 730. The security table 167 is a table for converting the output value of the piezoelectric element 730 and security information. For example, four output values from the first piezoelectric element 730a, the second piezoelectric element 730b, the third piezoelectric element 730c, and the fourth piezoelectric element 730d may be associated with four digits of alphanumeric characters. This 4-digit alphanumeric character becomes a password.

  When receiving the output value from the piezoelectric element 730, the control unit 161 refers to the security table 167 and converts it into a password. For example, the password is used as a password for accessing a specific file. Specifically, it is used as a password for reading a specific file from the communication unit 164 or recording medium 166 to the control unit 161 or as a password for opening a specific file read from the communication unit 164 or recording medium 166 to the control unit 161. Is done.

  Here, as an application example of the projection display apparatus 100 according to the present embodiment, an example used in a public office will be described. Public offices hold official document data as electromagnetic records and are required to be confidential. Certain official document data can only be viewed, printed, copied and edited by authorized personnel. For example, family register data can be browsed, printed, copied, and edited only by employees authorized by the family register section. In principle, staff in other departments cannot view, print, copy, or edit family register data.

  The family register section has a stand 800 dedicated to the family register section as a password for accessing the family register data. A staff member authorized by the family register section can view the projection image of the family register data by installing the projection display apparatus 100 on the installation table 800. The family register data can be printed, copied, and edited by operating the information processing apparatus to which the projection display apparatus 100 is connected. The installation table 800 cannot access data other than family register data such as basic resident register data. By holding the installation table 800 in which the depth of the groove portion 810 is different for each section in the office, it is possible to prohibit the staff of one section from accessing the official document data of another section.

  FIG. 17 is a flowchart for explaining the operation of the projection display system 500 according to the second embodiment. The control unit 161 acquires the output value of the piezoelectric element 730 (S30). The output of the piezoelectric element 730 is different for each installation base 800. The control unit 161 determines whether or not the output value is within a set range for accessing a specific file (S32). When it is within the set range (Y of S32), the control unit 161 permits the use of the file (S34), and when outside the set range (N of S32), restricts or prohibits the use of the file (S36). ).

[Modification 1 of Embodiment 2]
Hereinafter, the projection display apparatus 100 according to the first modification of the second embodiment will be described. In the basic example of the second embodiment, the piezoelectric element 730 is used as means for detecting the fitting state between the leg member 710 and the groove 810. In this regard, this modification uses an electrical contact.

  FIG. 18 is a partial view showing a convex portion of the projection display apparatus 100 according to the first modification of the second embodiment. FIG. 18 shows one convex portion installed on the bottom surface of the projection display apparatus 100. The leg member 710 has a plurality of conduction paths having different electrical characteristics at different positions. More specifically, along the moving direction of the leg member 710, conduction paths are installed in the leg member 710 at regular intervals. Each conduction path has a different resistance value. In FIG. 18, four conduction paths are provided, each having a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4.

  An electrical contact is installed in the groove for guiding the leg member 710. More specifically, the positive contact 742 and the negative contact 743 are respectively installed at predetermined positions. Within the groove, the positive contact 742 and the negative contact 743 are electrically separated. The positive contact 742 and the negative contact 74 are installed in a positional relationship in which when one of them contacts one of the conduction paths, the other contacts the same conduction path.

  The projection display apparatus 100 according to the first modification of the second embodiment includes a DC power supply 741 and a voltage detection circuit 744. The positive terminal of the DC power supply 741 is connected to the positive contact 742, and the negative terminal of the DC power supply 741 is connected to the negative contact 743. The voltage detection circuit 744 is connected to a node between the positive terminal of the DC power supply 741 and the positive contact 742, and detects the node voltage. This node voltage differs depending on the type of conduction path that conducts the positive contact 742 and the negative contact 743. This is because the resistance values of the respective conduction paths are different. The voltage detection circuit 744 outputs the detected node voltage to the control unit 161 as an output value. The control unit 161 restricts or permits the use of some or all functions of the projection display apparatus 100 according to the output value of the voltage detection circuit 744. Since the output value of the voltage detection circuit 744 reflects the fitting state of the leg member 710 and the groove 810, the fitting state can be detected also by this modification. In addition, although the example which uses a voltage detection circuit was demonstrated in FIG. 18, you may use a current detection circuit.

[Modification 2 of Embodiment 2]
In the above description of the projection display apparatus 100 according to the second embodiment, the installation table 800 is required for each unit to be protected. The unit to be secured is defined by a function unit to be used, a file unit, or a combination unit of both. If the units to be protected are associated with passwords, the number of types of installation bases 800 corresponding to the number of types of passwords is required. In the second modification, the number of installation bases 800 is reduced by using the bulky member 840.

  FIG. 19 is a diagram illustrating an installation base 800 according to the second modification of the second embodiment. In this modification, a bulky member 840 to be filled in the groove 810 of the installation table 800 is used. If a bulk member 840 having a different thickness is prepared for each unit to be protected, security can be realized with one installation base 800. Further, when using the bulky member 840 having the same thickness, the same security protection can be realized by changing the number of bulky members 840 buried in the groove portion 810.

  As described above, according to the second embodiment, the use of the projection display apparatus 100 is restricted according to the fitting state between the projections of the casing 200 of the projection display apparatus 100 and the recesses of the installation table 800. By doing so, the image to be projected by the projection display apparatus 100 can be secured. By using the physical structure such as the depth of the recess of the installation table 800 as a key, security can be enhanced compared to the case where electronic data is used as a key. Keys that rely on digital are always exposed to the risk of leakage and the risk of decryption by digital attacks. On the other hand, the analog and physical keys are easy to detect theft, and high security can be realized if they are stored strictly.

  The present invention has been described based on some embodiments. It is understood by those skilled in the art that these embodiments are exemplifications, and that various modifications can be made to combinations of the respective constituent elements and processing processes, and such modifications are also within the scope of the present invention. By the way.

  In the first embodiment, the example in which the information processing apparatus 400 is included in the projection display system 500 has been described. In this regard, the projection display system 500 may include only the plurality of projection display apparatuses 100 without including the information processing apparatus 400. In this case, any one of the plurality of projection display apparatuses 100 may function as the information processing apparatus 400 as a host.

  In the first embodiment, the example in which the operation on the information processing apparatus 400 is not reflected on itself and the projection display apparatus 100 in a state where the information processing apparatus 400 also does not have priority. In this regard, the operation on the information processing apparatus 400 may be treated as always valid, and the operation on the information processing apparatus 400 may be reflected on itself and the projection display apparatus 100 regardless of the presence or absence of priority.

  In the modification of the first embodiment, the control unit 161 of the projection display apparatus 100 that does not have priority has its own interactive operation on the projection display apparatus 100 reflected in real time to other projection display images. Reflected in the display device 100 with a time difference. In this regard, the interactive operation may not be reflected on itself in real time, but may be reflected on itself in synchronization with the timing reflected on the other projection display apparatus 100. In this case, the commonality of images displayed in the projection display system 500 can be strictly observed.

  In the modification of the first embodiment, the control unit 161 of the projection display apparatus 100 that does not have priority has instruction information for reflecting the interactive operation on the projection display apparatus 100 in the temporary storage unit 165. I remembered it temporarily. In this regard, the instruction information may be notified to the information processing apparatus 400 in real time without being stored in the temporary storage unit 165. In this case, the instruction information is temporarily stored in the temporary storage unit 450 of the information processing apparatus 400.

  In Embodiment 2, an example in which four pairs of leg members 710 and groove portions 810 are provided has been described, but the present invention is not limited to four sets. It may be less than 3 sets or 5 sets or more. As the number increases, the security level can be increased.

  In the second embodiment, an example in which the installation base 800 has a concave portion and the housing 200 of the projection display apparatus 100 has a convex portion has been described. In this regard, the installation base 800 may have a convex portion, and the housing 200 of the projection display apparatus 100 may have a concave portion. A protrusion is provided on the upper surface of the installation table 800. A plurality of protrusions having different heights may be provided. The housing 200 of the projection display apparatus 100 is provided with a groove into which the protrusion is to be inserted, and a contact member corresponding to the leg member 710 is provided in the groove.

  The unit of security protection can be subdivided from the above description in the second embodiment. For example, a different security protection unit may be assigned to each combination of section and post. For example, the chief of the family register section is given an installation table 800 corresponding to passwords for referencing, printing, and copying family register data, and the manager of the family register section is installed corresponding to passwords for referring, printing, copying, and editing family register data A stand 800 is provided.

  In the second embodiment, the projection display apparatus 100 is described as an electronic apparatus installed on the installation table 800. In this regard, not only the projection display apparatus 100 but also a printing apparatus, a display apparatus provided with a display, an audio output apparatus provided with a speaker, an information processing apparatus, etc. Any device can be used.

  70a light modulation unit, 100 projection type image display device, 110a projection unit, 161 control unit, 162 image analysis unit, 163 video processing unit, 164 communication unit, 165 temporary storage unit, 166 recording medium, 167 security table, 200 housing 400 information processing apparatus, 410 control unit, 440 communication unit, 470 video processing unit, 500 projection type video display system, 600 network, 710 leg member, 720 spring, 730 piezoelectric element, 800 installation base, 810 groove unit.

Claims (10)

A projection display apparatus connected to another projection display apparatus via a network,
A projection unit that projects an image on a projection surface;
A detection unit for detecting an interactive operation;
A communication unit that transmits and receives information to and from other projection display devices;
A control unit that sends instruction information for reflecting the detected interactive operation to another projection display device via the communication unit, and
The projection unit projects a common image with other projection display devices,
The control unit reflects the detected interactive operation on another projection display device when it has priority, and reflects the detected interactive operation on another projection display when it does not have priority. A projection-type image display device characterized in that it does not. In a state where none of the plurality of projection display devices connected to the network has priority, when the detection unit first detects an interactive operation, the control unit acquires the priority,
2. The projection display apparatus according to claim 1, wherein, after the priority is acquired, if the detection unit does not detect an interactive operation for a certain period, the control unit loses the priority. .   3. The projection display apparatus according to claim 1, wherein the control unit restricts interactive operation with respect to the projection display apparatus when the control unit does not have the priority. 4. An image processing unit that updates an image projected from the projection unit according to detected interactive operation or instruction information from another projection display device;
A storage unit that temporarily stores the detected interactive operation;
When the control unit does not have the priority, the control unit supplies instruction information for reflecting an interactive operation on the projection display apparatus to the video processing unit, and stores the instruction information in the storage unit.
3. The projection display apparatus according to claim 1, wherein, when the priority is acquired, the control unit transmits the instruction information stored in the storage unit to the network. 4. A projection image display system comprising a plurality of projection image display devices connected by a network,
Each projection display device
A projection unit that projects an image on a projection surface;
A detection unit for detecting an interactive operation;
A communication unit that transmits and receives information to and from other projection display devices;
A control unit that sends instruction information for reflecting the detected interactive operation to another projection display device via the communication unit, and
The plurality of projection display devices project a common image,
Among the plurality of projection image display devices, the projection image display device having priority has its interactive operation reflected on the other projection image display devices, and the projection image display device having no priority has no effect on itself. A projection display system characterized in that interactive operations are not reflected in other projection display apparatuses. The projection display system further includes an information processing apparatus connected to the plurality of projection display apparatuses via the network,
The information processing device displays an image common to the images projected by the plurality of projection display devices;
6. The information processing apparatus according to claim 5, wherein when any of the plurality of projection display apparatuses has the priority, the information processing apparatus does not reflect an operation on itself to the plurality of projection display apparatuses. Projection image display system. An electronic device comprising an installation table having a recess or a projection, and a housing having a projection or a recess to be fitted to the recess or projection of the installation table,
A detecting portion for detecting a recessed state or a protruding portion of the installation table and a fitting state of the protruding portion or the recessed portion of the housing;
A control unit that restricts or permits the use of the electronic device according to the detected fitting state;
An electronic device comprising: A movable contact member that is provided in a convex portion or a concave portion of the housing, and is to contact the concave portion or the convex portion of the installation table;
An elastic member attached to an opposite side of the exposed surface of the contact member,
The detection unit includes a piezoelectric element,
The piezoelectric element receives the pressure that the contact member receives from the concave portion or the convex portion of the installation base via the elastic member,
The electronic device according to claim 7, wherein the control unit restricts or permits use of the electronic device according to an output value of the piezoelectric element. A movable contact member that is provided in a convex portion or a concave portion of the housing, and is to contact the concave portion or the convex portion of the installation table;
An elastic member attached to an opposite side of the exposed surface of the contact member,
The detection unit includes an electrical contact,
The contact member has a plurality of conduction paths having different electrical characteristics at different positions,
The electronic device according to claim 7, wherein the control unit restricts or permits use of the electronic device in accordance with an electric signal appearing at the electric contact.   The plurality of leg members are installed on the bottom surface of the casing of the electronic device, the plurality of grooves are formed on the top surface of the installation base, and the depths of the plurality of grooves are different. 9. The electronic device according to any one of 9.

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