WO2024111336A1 - Dispositif de projection, procédé de commande et programme de commande - Google Patents

Dispositif de projection, procédé de commande et programme de commande Download PDF

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Publication number
WO2024111336A1
WO2024111336A1 PCT/JP2023/038517 JP2023038517W WO2024111336A1 WO 2024111336 A1 WO2024111336 A1 WO 2024111336A1 JP 2023038517 W JP2023038517 W JP 2023038517W WO 2024111336 A1 WO2024111336 A1 WO 2024111336A1
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WO
WIPO (PCT)
Prior art keywords
projection device
image data
projection
unit
communication unit
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PCT/JP2023/038517
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English (en)
Japanese (ja)
Inventor
一樹 石田
和紀 井上
真彦 宮田
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富士フイルム株式会社
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Publication of WO2024111336A1 publication Critical patent/WO2024111336A1/fr

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Definitions

  • the present invention relates to a projection device, a control method, and a control program.
  • Patent Document 1 describes a multi-screen display device in which a digital interface with a video input terminal and a video output terminal is provided on multiple display units arranged vertically and horizontally, the video output terminal of the preceding display unit and the video input terminal of the following display unit are connected in series in sequence via a communication cable, and when a failure occurs in the preceding display unit and an error signal is received, the display unit freezes the screen, displays a built-in test pattern, or displays a different input image, thereby switching the screen state of the display unit connected downstream of the failed display unit.
  • Patent document 2 describes a multi-display device in which display devices are arranged vertically and horizontally and connected in a daisy chain, and if a specific display device experiences an error and is powered off, error information is displayed on the screen of the display device that is the source of the error.
  • Patent document 3 describes a multi-display device in which n displays and two supply ports of a video signal supply unit are daisy-chained with cables, and the video signal supply unit normally supplies video signals only from the first supply port (upstream side), but if an abnormality occurs in any of the displays, it also supplies video signals from the second supply port (downstream side), so that video signals are also supplied to displays after the abnormal display.
  • One embodiment of the technology disclosed herein provides a projection device, control method, and control program that can make image distortion less noticeable when an abnormality occurs.
  • a projection device including a projection unit, a first communication unit capable of communicating with a first projection device, a second communication unit capable of communicating with a second projection device, and a processor,
  • the processor is performing control to project, on the projection unit, one of a first image represented by first image data received by the first communication unit from the first projection device and a second image represented by second image data different from the first image data; performing control to transmit one of the first image data and the second image data from the second communication unit to the second projection device; Projection device.
  • a projection device according to any one of (1) to (4), When the processor detects that there is an abnormality in the projection unit, the processor controls the projection unit to project a third image represented by third image data different from the first image data and the second image data. Projection device.
  • a projection device is capable of receiving image data from a plurality of projection devices including the first projection device;
  • the second image data includes image data received from a projection device other than the first projection device among the plurality of projection devices. Projection device.
  • a projection device according to any one of (1) to (6), A memory unit is provided, The second image data includes image data that is predetermined and stored in the storage unit. Projection device.
  • a projection device according to any one of (1) to (7), a storage unit that stores image data received from the first projection device, The second image data includes image data stored in the storage unit. Projection device.
  • the projection device according to (8), The image data stored in the storage unit includes at least a portion of the first image data. Projection device.
  • the projection device according to (8) or (9),
  • the image data stored in the storage unit includes image data different from the first image data. Projection device.
  • a projection device according to any one of (1) to (10), When the processor detects an abnormality in communication between the first projection device and the first communication unit, the processor controls the projection unit to project the second image based on an elapsed time since the abnormality occurred. Projection device.
  • a projection device according to any one of (1) to (11), When the processor detects an abnormality in communication between the first projection device and the first communication unit, the processor controls the projection unit to project the second image based on display timing information received from an external device. Projection device.
  • a projection device according to any one of (1) to (12), the second communication unit is capable of receiving image data from the second projection device, The first communication unit is capable of transmitting image data to the first projection device. Projection device.
  • a projection device according to any one of (1) to (13), A plurality of projection devices connected in a ring are included, When the processor detects that the second communication unit has received image data from the second projection device, the processor controls the first communication unit to transmit the image data received from the second projection device to the first projection device. Projection device.
  • a projection device according to any one of (1) to (14),
  • the second image is an image having content corresponding to the content of the first image. Projection device.
  • a method for controlling a projection device including a projection unit, a first communication unit capable of communicating with a first projection device, a second communication unit capable of communicating with a second projection device, and a processor, comprising: The processor, performing control to project, on the projection unit, one of a first image represented by first image data received by the first communication unit from the first projection device and a second image represented by second image data different from the first image data; performing control to transmit one of the first image data and the second image data from the second communication unit to the second projection device; Control methods.
  • a method for controlling a projection device including a projection unit, a first communication unit capable of communicating with a first projection device, a second communication unit capable of communicating with a second projection device, and a processor, comprising: The processor, performing control to project, on the projection unit, one of a first image represented by first image data received by the first communication unit from the first projection device and a second image represented by second image data different from the first image data; performing control to transmit one of the first image data and the second image data
  • a control program for a projection device including a projection unit, a first communication unit capable of communicating with a first projection device, a second communication unit capable of communicating with a second projection device, and a processor
  • the processor includes: performing control to project, on the projection unit, one of a first image represented by first image data received by the first communication unit from the first projection device and a second image represented by second image data different from the first image data; performing control to transmit one of the first image data and the second image data from the second communication unit to the second projection device;
  • a control program for executing processing includes: performing control to project, on the projection unit, one of a first image represented by first image data received by the first communication unit from the first projection device and a second image represented by second image data different from the first image data; performing control to transmit one of the first image data and the second image data from the second communication unit to the second projection device;
  • the present invention provides a projection device, control method, and control program that can make image distortion less noticeable when an abnormality occurs.
  • FIG. 1 is a diagram showing an example of a projection system 100 including a projection apparatus according to an embodiment of the present invention.
  • FIG. 1 is a diagram illustrating a conventional state when a communication abnormality occurs in a projection system.
  • 2 is a diagram showing an example of the internal configuration of a projection device 120B according to the first embodiment.
  • FIG. 2 is a schematic diagram showing an example of the internal configuration of a projection unit 125.
  • FIG. FIG. 2 illustrates an example of a hardware configuration of a computer 110.
  • 13A and 13B are diagrams illustrating the operation of the projection device 120B when an abnormality occurs.
  • FIG. 11 is a diagram showing an example of the internal configuration of a projection device 120B according to a second embodiment.
  • FIG. 13A and 13B are diagrams illustrating the operation of the projection device 120B when an abnormality occurs.
  • FIG. 13 is a diagram showing an example of the internal configuration of a projection device 120B according to a third embodiment.
  • 13A and 13B are diagrams illustrating the operation of the projection device 120B when an abnormality occurs.
  • FIG. 13 is a diagram showing an example of the internal configuration of a projection device 120B according to a fourth embodiment.
  • 13A and 13B are diagrams illustrating the operation of the projection device 120B when an abnormality occurs.
  • FIG. 13 is a diagram showing an example of the internal configuration of a projection device 120B according to a fifth embodiment.
  • FIG. 13 is a diagram showing an example of the internal configuration of a projection device 120B according to a sixth embodiment.
  • FIG. 1 is a diagram showing an example of a connection state of projection devices 120A to 120D connected to a computer 110.
  • FIG. FIG. 13 is a diagram illustrating a change in a transmission path when an abnormality occurs.
  • 1 is a diagram showing an example of a connection state of projection devices 120A to 120D connected to a computer 110.
  • FIG. FIG. 13 is a diagram showing a state in which an abnormality occurs between the projection device 120A and the projection device 120B.
  • 13 is a diagram showing a state in which an abnormality occurs between the computer 110 and the projection device 120A.
  • Fig. 1 is a diagram showing an example of a projection system 100 including a projection device according to the present embodiment.
  • the projection system 100 includes a plurality of projection devices 120 (120A to 120C), a computer 110 that controls the projection devices 120, and a screen 130 (130A to 130C) that is a projection object.
  • the projection devices 120 (120A to 120C) are, for example, projectors. Note that, although the configuration includes three projection devices in this example, the number of projection devices is not limited.
  • the computer 110 is, for example, a control personal computer, and is capable of transmitting image data to the projection device 120 (120A to 120C).
  • the image data transmitted by the computer 110 includes, for example, first image data and second image data.
  • the first image data is, for example, image data representing an image projected from the projection device 120 (120A to 120C) when the projection system 100 is operating normally and no abnormality has occurred.
  • the second image data is, for example, image data representing an image projected from the projection device 120 (120A to 120C) when an abnormality has occurred in the projection system 100.
  • Projection device 120A is a device capable of projecting an image onto screen 130A.
  • Projection device 120B is a device capable of projecting an image onto screen 130B.
  • Projection device 120C is a device capable of projecting an image onto screen 130C.
  • projection device 120A projects a projection image onto projectable range 120a of screen 130A.
  • Projection device 120B projects a projection image onto projectable range 120b of screen 130B.
  • Projection device 120C projects a projection image onto projectable range 120c of screen 130C.
  • Projection device 120A is communicatively connected to computer 110 via communication line 11. Image data output from computer 110 is input to projection device 120A. Projection device 120A is also communicatively connected to projection device 120B via communication line 12. Image data output from projection device 120A is input to projection device 120B. Projection device 120B is communicatively connected to projection device 120C via communication line 13. Image data output from projection device 120B is input to projection device 120C. Projection devices 120A, 120B, and 120C are daisy-chained to computer 110 via communication lines 11, 12, and 13 so as to be communicatively connected. Projection device 120 (120A to 120C) projects the same image onto screen 130 (130A to 130C) during normal operation when no abnormality occurs in projection system 100. Projection devices 120A to 120C may be connected in series to computer 110, and may also be connected in parallel to computer 110 wirelessly or via a low-speed wired connection.
  • the projection device 120A connected to the computer 110 is hereinafter also referred to as the master projection device.
  • the projection device connected closer to the computer 110 is also referred to as the upstream projection device
  • the projection device connected farther from the computer 110 is also referred to as the downstream projection device.
  • the projection device 120A is the most upstream projection device
  • the projection device 120C is the most downstream projection device.
  • the projection device 120A is an example of the first projection device in the present invention.
  • the projection device 120C is an example of the second projection device in the present invention.
  • Screen 130 is a projection object having a projection surface on which images projected by projection device 120A to projection device 120C are displayed.
  • the projection surface of screen 130 is a rectangular flat surface.
  • the projection object is not limited to a screen, and may be, for example, a wall surface of a building, etc.
  • FIG. 2 is a diagram for explaining the conventional data transmission state when a communication abnormality occurs in the projection system 100.
  • a communication abnormality (marked with an x) occurs between the projection device 120A and the projection device 120B.
  • Possible causes of the communication abnormality include, for example, an abnormality in the communication interface of the projection device 120A through which the projection device 120A communicates with the projection device 120B, an abnormality in the communication interface of the projection device 120B through which the projection device 120B communicates with the projection device 120A, and an abnormality in the communication line 12.
  • normal image data is not transmitted to the projection device downstream of the position where the abnormality occurs, that is, the projection device 120B and the projection device 120C.
  • the present invention makes it possible to make image distortion less noticeable in the projection device downstream of the position where the communication abnormality occurs, even if a communication abnormality occurs in the projection system 100, for example, as shown in FIG. 2.
  • FIG. 3 is a diagram showing an example of the internal configuration of the projection device 120B according to the first embodiment.
  • the projection device 120B shown in FIG. 3 shows a normal state in which no abnormality occurs in the projection system 100.
  • the projection device 120B according to the first embodiment includes a control unit 121, communication units 122 and 126, a storage unit 123, a selector 124, and a projection unit 125.
  • the control unit 121 is an example of a processor in the present invention.
  • the communication unit 122 is an example of a first communication unit in the present invention.
  • the communication unit 126 is an example of a second communication unit in the present invention.
  • the projection devices 120A and 120C have the same internal configuration as the projection device 120B.
  • the control unit 121 controls the projection in the projection device 120B.
  • the control unit 121 is a device that includes a control unit composed of various processors, a communication interface (not shown) for communicating with each unit, and a storage medium (not shown) such as a hard disk, SSD (Solid State Drive), or ROM (Read Only Memory), and controls the projection unit 125.
  • the various processors of the control unit in the control unit 121 include a CPU (Central Processing Unit), which is a general-purpose processor that executes programs to perform various processes, a programmable logic device (PLD), which is a processor whose circuit configuration can be changed after manufacture, such as an FPGA (Field Programmable Gate Array), or a dedicated electrical circuit, such as an ASIC (Application Specific Integrated Circuit), which is a processor with a circuit configuration designed specifically to perform specific processes.
  • a CPU Central Processing Unit
  • PLD programmable logic device
  • FPGA Field Programmable Gate Array
  • ASIC Application Specific Integrated Circuit
  • control unit in the control unit 121 may be composed of one of the various processors, or may be composed of a combination of two or more processors of the same or different types (for example, a combination of multiple FPGAs or a combination of a CPU and an FPGA).
  • the communication unit 122 of the projection device 120B is a communication interface capable of communicating with the projection device 120A.
  • the communication unit 122 of the projection device 120B is connected via the communication line 12 to the communication unit 126 of the projection device 120A, which is arranged upstream of the projection device 120B in the projection device 120C from the daisy-chain-connected projection device 120A.
  • the first image data output from the projection device 120A is input to the communication unit 122 of the projection device 120B via the communication line 12.
  • the communication unit 126 of the projection device 120B is a communication interface capable of communicating with the projection device 120C.
  • the communication unit 126 of the projection device 120B is connected via a communication line 13 to the communication unit 122 of the projection device 120C, which is located downstream of the projection device 120B in the projection device 120C, and is daisy-chained from the projection device 120A.
  • the communication unit 122 of the projection device 120A which is the master projection device, is a communication interface capable of communicating with the control computer 110, and is connected to the communication interface 113 (see FIG. 5) of the computer 110.
  • the communication units 122 and 126 may be wired communication interfaces that perform wired communication as shown in FIG. 1, or wireless communication interfaces that perform wireless communication.
  • the communication units 122 and 126 in each projection device may be configured as a single communication unit that has the functions of both communication units.
  • the storage unit 123 stores, for example, second image data that is image data used when an abnormality occurs in the projection system 100 .
  • the second image data is different from the first image data.
  • the second image data includes, for example, simplified image data of the first image data, image data of an error message notifying the occurrence of an abnormality, and the like.
  • the simplified image data includes image data with a reduced data size, for example, image data with a reduced number of pixels, quality, number of colors, and frame rate (in the case of a moving image).
  • the second image data includes, for example, image data obtained by extracting a part of the first image data.
  • the second image data is predetermined image data.
  • the predetermined image data is, for example, image data stored in the storage unit 123 during the manufacture of the projection system 100 or before operation.
  • the storage unit 123 is, for example, configured of a non-volatile memory.
  • the selector 124 is capable of selecting and outputting one signal from two input signals.
  • One input terminal of the selector 124 is connected to the output terminal of the communication unit 122, and the other input terminal is connected to the output terminal of the storage unit 123.
  • the first image data output from the communication unit 122 is input to one input terminal of the selector 124.
  • the second image data stored in the storage unit 123 is input to the other input terminal of the selector 124.
  • the input terminal of the projection unit 125 and the input terminal of the communication unit 126 are connected to the output terminal of the selector 124.
  • the selector 124 outputs the selected input signal to the projection unit 125 and the communication unit 126.
  • the operation of the selector 124 is controlled by the control unit 121.
  • the projection unit 125 is configured, for example, by a liquid crystal projector or a projector using LCOS (Liquid Crystal On Silicon). In the following, the projection unit 125 will be described as being a liquid crystal projector.
  • LCOS Liquid Crystal On Silicon
  • the control unit 121 controls the selector 124 to select the first image data from the communication unit 122 from the two image data input to the selector 124.
  • the first image data output from the selector 124 is input to the projection unit 125 and the communication unit 126.
  • the control unit 121 controls the projection unit 125 to project a first image represented by the first image data.
  • the control unit 121 also controls the communication unit 126 to transmit the first image data to the projection device 120C.
  • Fig. 4 is a schematic diagram showing an example of the internal configuration of the projection unit 125.
  • the projection unit 125 includes a light source 125a, a light modulation unit 125b, a projection optical system 125c, and a control circuit 125d.
  • the light source 125a includes a light emitting element such as a laser or an LED (Light Emitting Diode), and emits, for example, white light.
  • the light modulation unit 125b is composed of three liquid crystal panels (light modulation elements) that modulate the three color lights emitted from the light source 125a and separated into red, blue, and green by a color separation mechanism (not shown) based on image information to emit each color image, and a dichroic prism that mixes the color images emitted from the three liquid crystal panels and emits them in the same direction.
  • Each of the three liquid crystal panels may be equipped with a red, blue, and green filter, and the white light emitted from the light source 125a may be modulated by each liquid crystal panel to emit each color image.
  • the projection optical system 125c receives light from the light source 125a and the light modulation unit 125b, and is configured, for example, by a relay optical system that includes at least one lens. The light that passes through the projection optical system 125c is projected onto the screen 130B.
  • the area of screen 130B that is irradiated with light that is transmitted through the entire range of light modulation section 125b becomes projectable range 120b onto which projection section 125 can project.
  • the area of this projectable range 120b that is irradiated with light that is actually transmitted from light modulation section 125b becomes the projection range of projection section 125 (range of projected image).
  • the size, position, and shape of the projection range of projection section 125 changes within projectable range 120b.
  • the control circuit 125d controls the light source 125a, the light modulation unit 125b, and the projection optical system 125c based on the image data input from the control unit 121, thereby projecting an image based on this image data onto the projection range 120b of the screen 130B.
  • the image data input to the control circuit 125d is composed of three pieces of data: data for displaying red, data for displaying blue, and data for displaying green.
  • the control circuit 125d also changes the projection optical system 125c based on commands input from the control unit 121, thereby expanding or reducing the projection range of the projection unit 125.
  • FIG. 5 is a diagram showing an example of a hardware configuration of the computer 110.
  • the computer 110 shown in Fig. 1 includes a processor 111, a memory 112, a communication interface 113, and a user interface 114.
  • the processor 111, the memory 112, the communication interface 113, and the user interface 114 are connected by, for example, a bus 119.
  • the processor 111 is a circuit that performs signal processing, and is, for example, a CPU that controls the entire computer 110.
  • the processor 111 may also be realized by other digital circuits such as an FPGA or a DSP (Digital Signal Processor).
  • the processor 111 may also be realized by combining multiple digital circuits.
  • Memory 112 includes, for example, a main memory and an auxiliary memory.
  • the main memory is, for example, a RAM (Random Access Memory).
  • the main memory is used as a work area for processor 111.
  • the auxiliary memory is a non-volatile memory such as a magnetic disk, optical disk, or flash memory.
  • Various programs that operate the computer 110 are stored in the auxiliary memory.
  • the programs stored in the auxiliary memory are loaded into the main memory and executed by the processor 111.
  • the auxiliary memory may also include portable memory that is removable from the computer 110.
  • Portable memory includes memory cards such as a Universal Serial Bus (USB) flash drive or a Secure Digital (SD) memory card, and external hard disk drives.
  • USB Universal Serial Bus
  • SD Secure Digital
  • the communication interface 113 is a communication interface that communicates with the outside of the computer 110 (e.g., the projection device 120A).
  • the communication interface 113 is controlled by the processor 111.
  • the communication interface 113 may be a wired communication interface that performs wired communication, a wireless communication interface that performs wireless communication, or may include both a wired communication interface and a wireless communication interface.
  • the user interface 114 includes, for example, an input device that accepts operational input from the user, and an output device that outputs information to the user.
  • the input device can be realized, for example, by a pointing device (for example, a mouse), a key (for example, a keyboard), or a remote control.
  • the output device can be realized, for example, by a display or a speaker.
  • the input device and the output device may also be realized by a touch panel or the like.
  • the user interface 114 is controlled by the processor 111.
  • FIG. 6 is a diagram for explaining the operation of the projection device 120B when an abnormality occurs in the projection system 100 equipped with the projection device 120B of the first embodiment.
  • an abnormality (marked with an x) occurs between the projection device 120A and the projection device 120B.
  • the abnormality refers to a state in which the communication unit 122 of the projection device 120B cannot receive normal image data from the communication unit 126 (not shown) of the projection device 120A.
  • normal image data cannot be received, this includes not only a state in which the communication unit 122 cannot receive image data from the projection device 120A, but also a state in which the delay of the first image data is large.
  • Possible causes of the abnormality include, for example, an abnormality in the communication unit 126 of the projection device 120A, an abnormality in the communication unit 122 of the projection device 120B, an abnormality in the communication line 12, an abnormality in the image data itself, and the like.
  • the control unit 121 When the communication unit 122 of the projection device 120B detects an abnormality, it transmits an abnormality occurrence signal to the control unit 121 to notify the occurrence of the abnormality.
  • the control unit 121 receives the abnormality occurrence signal from the communication unit 122, it performs switching control to switch the input of the selector 124 from the communication unit 122 side to the storage unit 123 side, and performs control to read out the second image data stored in the storage unit 123 and output it from the output terminal of the selector 124.
  • the control unit 121 controls the projection unit 125 to project a second image represented by the output second image data.
  • the control unit 121 also controls the communication unit 126 to transmit the second image data output from the selector 124 to the projection device 120C.
  • the projection device 120A which is located upstream of the position where the abnormality occurred (between the projection devices 120A and 120B), projects a first image represented by the first image data onto the screen 130A based on image data received from the computer 110.
  • the projection device 120B and 120C which are located downstream of the position where the abnormality occurred, projects a second image represented by the second image data onto the screen 130B based on the second image data stored in the memory unit 123 of the projection device 120B.
  • the projection device 120C projects a second image represented by the second image data onto the screen 130C based on the second image data received from the projection device 120B.
  • the abnormality is detected by the communication unit 122 of the projection device 120B, but this is not limited to the above.
  • the communication unit 126 of the projection device 120A may detect the abnormality and transmit an abnormality occurrence signal wirelessly from the projection device 120A to the projection device 120B, or the abnormality occurrence signal may be transmitted from the projection device 120A to the computer 110, and then transmitted wirelessly from the computer 110 to the projection device 120B.
  • the projection device 120 of the first embodiment detects an abnormality in communication between the communication unit 126 of the projection device 120A and the communication unit 122 of the projection device 120B, it controls the projection unit 125 to project the second image data stored in the memory unit 123 of the projection device 120B, and controls the communication unit 126 to transmit the second image data to the projection device 120C.
  • the second image data previously stored in the memory unit 123 can be transmitted to the projection device downstream of the position where the abnormality occurred.
  • the first image data that had been transmitted up until that point can be transmitted from the computer 110 to the projection device upstream of the position where the abnormality occurred. This makes it possible to make the image distortion caused when an abnormality occurs in the projection system 100 less noticeable.
  • FIG. 7 is a diagram showing an example of the internal configuration of a projection device 120B according to the second embodiment.
  • the projection device 120B shown in Fig. 7 shows a normal state in which no abnormality occurs in the projection system 100.
  • the projection device 120B of the second embodiment includes a control unit 121, communication units 122 and 126, storage units 123a and 123b, selectors 124a and 124b, and a projection unit 125.
  • the projection devices 120A and 120C have the same internal configuration as the projection device 120B.
  • the control unit 121 controls the projection of the projection device 120B in the same manner as the control unit 121 in the projection device 120B of the first embodiment.
  • the communication units 122, 126 of the projection device 120B are communication interfaces similar to the communication units 122, 126 in the projection device 120B of the first embodiment.
  • the storage unit 123a like the storage unit 123 in the projection device 120B of the first embodiment, stores second image data that is used when an abnormality occurs in the projection system 100.
  • the memory unit 123b stores third image data, which is image data used when an abnormality is detected in the projection unit 125.
  • the third image data is different from the first image data and the second image data.
  • the third image data includes, for example, image data that can display a valid image even in an abnormal state in which the projection unit 125 cannot project color normally.
  • the third image data is image data that displays a grayscale image or a black and white image.
  • the third image data also includes, for example, image data of an error message that notifies the occurrence of an abnormality.
  • the third image data is predetermined image data.
  • the predetermined image data is, for example, image data that is stored in the memory unit 123b when the projection system 100 is manufactured or before it is put into operation.
  • the memory unit 123b is composed of a non-volatile memory, similar to the memory unit 123a.
  • the selector 124a is a selector that can select and output one signal from two input signals.
  • One input terminal of the selector 124a is connected to the output terminal of the communication unit 122, and the other input terminal is connected to the output terminal of the storage unit 123b.
  • the first image data output from the communication unit 122 is input to one input terminal of the selector 124a.
  • the third image data stored in the storage unit 123b is input to the other input terminal of the selector 124a.
  • the input terminal of the projection unit 125 is connected to the output terminal of the selector 124a.
  • the selector 124a outputs the selected input signal to the projection unit 125.
  • the operation of the selector 124a is controlled by the control unit 121.
  • the selector 124b is a selector that can select and output one signal from two input signals.
  • One input terminal of the selector 124b is connected to the output terminal of the communication unit 122, and the other input terminal is connected to the output terminal of the storage unit 123a.
  • the first image data output from the communication unit 122 is input to one input terminal of the selector 124b.
  • the second image data stored in the storage unit 123a is input to the other input terminal of the selector 124b.
  • the input terminal of the communication unit 126 is connected to the output terminal of the selector 124b.
  • the selector 124b outputs the selected input signal to the communication unit 126.
  • the operation of the selector 124b is controlled by the control unit 121, like the selector 124a.
  • the projection unit 125 is a projector or the like similar to the projection unit 125 in the projection device 120B of the first embodiment.
  • the control unit 121 controls the selector 124a to select the first image data from the communication unit 122 from the two image data input to the selector 124a.
  • the control unit 121 also controls the selector 124b to select the first image data from the communication unit 122 from the two image data input to the selector 124b.
  • the first image data output from the selector 124a is input to the projection unit 125
  • the first image data output from the selector 124b is input to the communication unit 126.
  • the control unit 121 controls the projection unit 125 to project the first image represented by the first image data.
  • the control unit 121 also controls the communication unit 126 to transmit the first image data to the projection device 120C.
  • [Operation of the projection device 120 in the event of an abnormality] 8 is a diagram for explaining the operation of the projection device 120B when an abnormality occurs in the projection system 100 equipped with the projection device 120B of the second embodiment. As shown in Fig. 8, for example, it is assumed that an abnormality (marked with an x) occurs in the projection unit 125. In this example, it is assumed that the abnormality is an abnormality in which the projection unit 125 cannot project a color normally.
  • the projection unit 125 When the projection unit 125 detects an abnormality in its own projection unit, it transmits an abnormality occurrence signal to the control unit 121 to notify the occurrence of the abnormality.
  • the control unit 121 receives the abnormality occurrence signal from the projection unit 125, it performs switching control to switch the input of the selector 124a from the communication unit 122 side to the memory unit 123b side, and performs control to output the third image data stored in the memory unit 123b from the output terminal of the selector 124a.
  • the control unit 121 controls the projection unit 125 to project the third image represented by the output third image data.
  • the control unit 121 also controls the input of the selector 124b to be maintained as the input on the communication unit 122 side, and controls the first image data from the communication unit 122 to be output from the output terminal of the selector 124b.
  • the control unit 121 controls the communication unit 126 to transmit the first image data output from the selector 124b to the projection device 120C.
  • the projection device 120B equipped with the projection unit 125 in which the abnormality occurred projects a third image represented by the third image data based on the third image data stored in the memory unit 123b onto the screen 130B.
  • the projection device 120A projects a first image represented by the first image data onto the screen 130A based on the image data transmitted from the computer 110.
  • the projection device 120C projects a first image represented by the first image data onto the screen 130C based on the first image data received from the projection device 120B, i.e., the first image data transmitted from the projection device 120A.
  • the abnormality occurrence signal notifying that the projection unit 125 is abnormal may be transmitted from the projection unit 125 to the projection device 120A and the computer 110, for example, wirelessly or via a low-speed wired connection.
  • the projection device 120 of the second embodiment detects an abnormality in the projection unit 125, it controls the projection unit 125 to project a third image represented by third image data different from the first image data and the second image data, and also controls the communication unit 126 to transmit the first image data to the projection device 120C.
  • the projection device 120C controls the projection unit 125 to project a third image represented by third image data different from the first image data and the second image data, and also controls the communication unit 126 to transmit the first image data to the projection device 120C.
  • FIG. 9 is a diagram showing an example of the internal configuration of a projection device 120B according to the third embodiment.
  • the projection device 120B shown in Fig. 9 shows a normal state in which no abnormality occurs in the projection system 100.
  • the projection device 120B of the third embodiment includes a control unit 121, communication units 122 (122a, 122b), 126, a selector 124, and a projection unit 125.
  • the projection devices 120A and 120C have the same internal configuration as the projection device 120B.
  • the control unit 121 controls the projection of the projection device 120B in the same manner as the control unit 121 in the projection device 120B of the first embodiment.
  • the communication units 122a and 126 of the projection device 120B are communication interfaces similar to the communication units 122 and 126 of the projection device 120B in the first embodiment.
  • the communication unit 122b of the projection device 120B is a communication interface capable of communicating with the projection device 110d.
  • the projection device 110d is a projection device provided separately from the projection device 120A to the projection device 120C that are daisy-chained.
  • the communication unit 122b of the projection device 120B is connected to the communication interface of the projection device 110d via the communication line 12d.
  • the second image data output from the projection device 110d is input to the communication unit 122b of the projection device 120B via the communication line 12d.
  • the second image data is image data that is used when an abnormality occurs in the projection system 100.
  • the second image data is input to the communication unit 122b from a projection device 110d other than the projection device 120A.
  • the communication unit 122 (122a, 122b) of the projection device 120B can receive image data from multiple projection devices including the projection device 120A.
  • the projection device 110d may be connected to the computer 110 to which the projection device 120A is connected, or may be connected to another computer or the like to which image data can be transmitted.
  • One input terminal of the selector 124 is connected to the output terminal of the communication unit 122a, and the other input terminal is connected to the output terminal of the communication unit 122b.
  • the first image data output from the communication unit 122a is input to one input terminal of the selector 124.
  • the second image data output from the communication unit 122b is input to the other input terminal of the selector 124.
  • the output terminal of the selector 124 is connected to the input terminal of the projection unit 125 and the input terminal of the communication unit 126, similar to the selector 124 in the first embodiment described above.
  • the projection unit 125 is a projector or the like similar to the projection unit 125 in the projection device 120B of the first embodiment.
  • the control unit 121 controls the selector 124 to select the first image data from the communication unit 122a from the two image data input to the selector 124.
  • the first image data output from the selector 124 is input to the projection unit 125 and the communication unit 126.
  • the control unit 121 controls the projection unit 125 to project the first image represented by the first image data.
  • the control unit 121 also controls the communication unit 126 to transmit the first image data to the projection device 120C.
  • FIG. 10 is a diagram for explaining the operation of the projection device 120B when an abnormality occurs in the projection system 100 equipped with the projection device 120B of the third embodiment.
  • an abnormality marked with an x
  • the abnormality is the same as the abnormality described in the first embodiment.
  • the communication unit 122a of the projection device 120B detects an abnormality, it transmits an abnormality occurrence signal to the control unit 121 to notify the control unit 121 that an abnormality has occurred.
  • the control unit 121 receives the abnormality occurrence signal from the communication unit 122a, it performs switching control to switch the input of the selector 124 from the communication unit 122a side to the communication unit 122b side, and performs control to output the second image data input from the communication unit 122b from the output terminal of the selector 124.
  • the control unit 121 controls the projection unit 125 to project a second image represented by the output second image data.
  • the control unit 121 also controls the communication unit 126 to transmit the second image data output from the selector 124 to the projection device 120C.
  • projection device 120A which is located upstream of the position where the abnormality occurred (between projection devices 120A and 120B), projects a first image represented by first image data onto screen 130A based on image data received from computer 110.
  • projection devices 120B and 120C which are located downstream of the position where the abnormality occurred, projection device 120B projects a second image represented by second image data onto screen 130B based on image data received from projection device 110d.
  • projection device 120C projects a second image represented by second image data onto screen 130C based on the second image data received from projection device 120B.
  • abnormality detection is performed by the communication unit 122a of the projection device 120B, but this is not limited to this.
  • abnormality detection may be performed by the communication unit 126 of the projection device 120A, as in the first embodiment.
  • the communication unit 122 (122a, 122b) can receive image data from multiple projection devices including the projection device 120A (for example, the projection device 110d), and when an abnormality in communication between the projection devices 120A and 120B is detected, the communication unit 122 controls the projection unit 125 to project the image 2 data received from the projection device 110d other than the projection device 120A, and controls the communication unit 126 to transmit the second image data to the projection device 120C.
  • the second image data received from the external projection device 110d can be used by the projection device downstream of the position where the abnormality occurred. This makes it possible to make the image distortion caused when an abnormality occurs in the projection system 100 less noticeable.
  • Fig. 11 is a diagram showing an example of the internal configuration of a projection device 120B according to the fourth embodiment.
  • the projection device 120B shown in Fig. 11 shows a normal state in which no abnormality occurs in the projection system 100.
  • the projection device 120B of the fourth embodiment includes a control unit 121, communication units 122 and 126, a storage unit 123, a selector 124, and a projection unit 125.
  • the projection devices 120A and 120C have the same internal configuration as the projection device 120B.
  • the control unit 121 controls the projection of the projection device 120B in the same manner as the control unit 121 in the projection device 120B of the first embodiment.
  • the communication unit 122 and the communication unit 126 of the projection device 120B are communication interfaces similar to the communication unit 122 and the communication unit 126 of the projection device 120B of the first embodiment.
  • the storage unit 123 is connected to the communication unit 122 of the projection device 120B so as to be able to communicate with it.
  • the second image data output from the communication unit 122 is stored in the storage unit 123.
  • the second image data output from the communication unit 122 is the second image data included in the image data received by the communication unit 122 from the projection device 120A.
  • the second image data is image data used when an abnormality occurs in the projection system 100.
  • the second image data is image data different from the first image data, for example, image data extracted from a portion of the first image data. Specifically, it may be image data extracted from one set of image data from the first image data configured to repeat image data for a predetermined period of time.
  • the second image data may also be, for example, simplified image data of the first image data, or image data of an error message notifying the occurrence of an abnormality.
  • Simplified image data includes image data with a reduced data size, for example, image data with reduced pixel count, quality, number of colors, or frame rate (for video).
  • the second image data is image data included in image data transmitted during normal operation when no abnormality occurs in the projection system 100.
  • the second image data may be transmitted, for example, when the projection system 100 is started up, or may be included in the image data and transmitted at predetermined intervals.
  • the storage unit 123 is composed of, for example, a volatile memory or a non-volatile memory.
  • the first image data output from the communication unit 122 and the second image data stored in the storage unit 123 are input to the input terminal of the selector 124, similar to the selector 124 in the first embodiment. Also, the input terminal of the projection unit 125 and the input terminal of the communication unit 126 are connected to the output terminal of the selector 124, similar to the selector 124 in the first embodiment.
  • the projection unit 125 is a projector or the like similar to the projection unit 125 in the projection device 120B of the first embodiment.
  • control unit 121 controls the selector 124 to select the first image data from the communication unit 122 from the two image data input to the selector 124, as in the first embodiment.
  • the control unit 121 also controls the projection unit 125 to project the first image represented by the first image data, and controls the communication unit 126 to transmit the first image data to the projection device 120C.
  • FIG. 12 is a diagram for explaining the operation of the projection device 120B when an abnormality occurs in the projection system 100 equipped with the projection device 120B of the fourth embodiment.
  • an abnormality marked with an x
  • the abnormality is the same as the abnormality described in the first embodiment. Due to the occurrence of the abnormality (marked with an x), image data from the projection device 120A is no longer transmitted to the storage unit 123.
  • the control unit 121 When the communication unit 122 of the projection device 120B detects an abnormality, it transmits an abnormality occurrence signal to the control unit 121 to notify the occurrence of the abnormality.
  • the control unit 121 performs switching control to switch the input of the selector 124 from the communication unit 122 side to the storage unit 123 side, and performs control to read out the second image data stored in the storage unit 123 and output it from the output terminal of the selector 124.
  • the control unit 121 also controls the projection unit 125 to project a second image represented by the output second image data, and controls the communication unit 126 to transmit the output second image data to the projection device 120C.
  • the projection device 120A which is arranged upstream of the position where the abnormality occurred (between the projection devices 120A and 120B), projects a first image represented by the first image data onto the screen 130A based on the image data received from the computer 110, as in the first embodiment.
  • the projection device 120B which is arranged downstream of the position where the abnormality occurred, projects a second image represented by the second image data onto the screen 130B based on the second image data stored in the memory unit 123 of the projection device 120B, as in the first embodiment.
  • the projection device 120C projects a second image represented by the second image data onto the screen 130C based on the second image data received from the projection device 120B.
  • abnormality detection is performed by the communication unit 122a of the projection device 120B, but this is not limited to this.
  • abnormality detection may be performed by the communication unit 126 of the projection device 120A, as in the first embodiment.
  • the projection device 120 of the fourth embodiment detects a communication abnormality between the projection device 120A and the projection device 120B, it controls the projection unit 125 to project the image 2 data received from the projection device 120A and stored in the memory unit 123, and also controls the communication unit 126 to transmit the second image data to the projection device 120C.
  • the second image data previously received from the projection device 120A can be used in the projection device downstream of the position where the abnormality occurred. This makes it possible to make image distortion when an abnormality occurs in the projection system 100 less noticeable.
  • FIG. 13 is a diagram showing an example of the internal configuration of the projection device 120B according to the fifth embodiment.
  • the projection device 120B shown in FIG. 13 shows an abnormal state in which an abnormality (marked with an x) occurs in the projection system 100.
  • the projection device 120B of the fifth embodiment includes a control unit 121, communication units 122 and 126, a storage unit 123, a selector 124, a projection unit 125, and a display control unit 127.
  • the projection device 120B of the fifth embodiment differs from the projection device 120B of the fourth embodiment shown in FIG. 11 in that a display control unit 127 is provided between the storage unit 123 and the selector 124.
  • the second image data stored in the storage unit 123 is input to the input terminal of the selector 124 through the display control unit 127.
  • the display control unit 127 controls the display timing from the projection unit 125 of the second image represented by the second image data.
  • the projection devices 120A and 120C have the same internal configuration as the projection device 120B.
  • the communication unit 122 of the projection device 120B When the communication unit 122 of the projection device 120B detects an abnormality, it transmits an abnormality occurrence signal to the control unit 121 and the display control unit 127 to notify that an abnormality has occurred.
  • the control unit 121 performs switching control to switch the input of the selector 124 from the communication unit 122 side to the storage unit 123 side, and performs control to read out the second image data stored in the storage unit 123 and output it from the output terminal of the selector 124. At this time, the second image data stored in the storage unit 123 is input to the selector 124 through the display control unit 127 and output from the output terminal of the selector 124.
  • the control unit 121 also controls the projection unit 125 to project a second image represented by the output second image data, and controls the communication unit 126 to transmit the output second image data to the projection device 120C.
  • the display control unit 127 measures the time that has elapsed since the occurrence of the abnormality based on the abnormality occurrence signal received from the communication unit 122.
  • the display control unit 127 controls the display timing at which the second image is displayed by projection from the projection unit 125 based on the measured elapsed time.
  • the display control unit 127 controls the display timing of the second image so that the display timing of the second image displayed by the projection unit 125 and the display timing of the first image displayed by the projection unit 125 of the projection device 120A that is operating normally are aligned.
  • the first image data received when the projection system 100 is normal is 10 seconds of video data and instruction information to repeat that video data.
  • the second image data stored in the memory unit 123 is 10 seconds of video data, which is the same image data as the first image data, and instruction information to repeat that video data.
  • the display control unit 127 detects the occurrence of an abnormality, it repeatedly reads out the second image data from the memory unit 123, for example, every 10 seconds, based on the measured elapsed time from the occurrence of the abnormality.
  • the display control unit 127 controls the display timing of the 10 seconds of the second image so that the timing at which the "10 seconds of the second image" represented by the read second image data is displayed by the projection unit 125 of the projection device 120B and the display timing of the "10 seconds of the first image" displayed by the projection unit 125 of the projection device 120A are aligned.
  • the projection device 120A which is arranged upstream of the position where the abnormality occurred (between the projection devices 120A and 120B), projects a first image represented by the first image data onto the screen 130A based on the image data received from the computer 110, as in the first embodiment.
  • the projection device 120B which is arranged downstream of the position where the abnormality occurred, projects a second image represented by the second image data onto the screen 130B based on the second image data stored in the storage unit 123 of the projection device 120B so that the display timing is synchronized with the first image displayed on the screen 130A of the projection device 120A.
  • the projection device 120C projects a second image represented by the second image data onto the screen 130C based on the second image data received from the projection device 120B so that the display timing is synchronized with the first image displayed on the screen 130A of the projection device 120A.
  • abnormality detection is performed by the communication unit 122a of the projection device 120B, but this is not limited to this.
  • abnormality detection may be performed by the communication unit 126 of the projection device 120A, as in the first embodiment.
  • the projection device 120 of the fifth embodiment detects a communication abnormality between the projection devices 120A and 120B, it controls the projection of the projection unit 125 of the projection device 120B based on the elapsed time since the abnormality occurred so that the timing at which the second image represented by the second image data is projected from the projection device 120B and the timing at which the first image represented by the first image data is projected from the projection device 120A are aligned based on the elapsed time since the abnormality occurred.
  • the image display timing between the projection devices can be aligned based on the elapsed time since the abnormality occurred, thereby reducing the sense of incongruity in the projected images.
  • FIG. 14 is a diagram showing an example of the internal configuration of the projection device 120B according to the sixth embodiment.
  • the projection device 120B shown in FIG. 14 shows an abnormal state in which an abnormality (marked with an x) occurs in the projection system 100.
  • the projection device 120B of the sixth embodiment includes a control unit 121, communication units 122 and 126, a storage unit 123, a selector 124, a projection unit 125, and a display control unit 127.
  • the projection device 120B of the sixth embodiment is different from the projection device 120B of the fifth embodiment in that the projection device 120B controls the display timing of the second image based on display timing information from the outside, in that the projection device 120B controls the display timing of the second image based on the elapsed time measured by the display control unit 127.
  • the projection device 120A and the projection device 120C have the same internal configuration as the projection device 120B.
  • the communication unit 122 of the projection device 120B When the communication unit 122 of the projection device 120B detects an abnormality, it transmits an abnormality occurrence signal to the control unit 121 and the display control unit 127 to notify the occurrence of the abnormality. As in the fifth embodiment, the control unit 121 switches the input of the selector 124 to cause the projection unit 125 to project the second image displayed by the second image data, and also causes the communication unit 126 to transmit the second image data to the projection device 120C.
  • the display control unit 127 controls the display timing of the second image projected by the projection unit 125 based on display timing information 128 input from the outside.
  • the display timing information 128 is transmitted to the display control unit 127 by wireless communication from the computer 110, for example.
  • the display timing information 128 may also be transmitted by wired communication through a transmission path provided separately from the transmission path (communication line 12) of the image data.
  • the display timing information 128 may be, for example, information that directly indicates the display timing of each image to be displayed, or information that notifies the elapsed time since the occurrence of an abnormality.
  • the display control unit 127 controls the display timing of the second image displayed by the projection unit 125 of the projection device 120B and the display timing of the first image displayed by the projection unit 125 of the projection device 120A operating normally so that they are aligned.
  • the projection device 120 of the sixth embodiment detects an abnormality in communication between the projection devices 120A and 120B, it controls the projection of the projection unit 125 of the projection device 120B based on the display timing information 128 input from the outside so that the timing at which the second image represented by the second image data is projected from the projection device 120B and the timing at which the first image represented by the first image data is projected from the projection device 120A are aligned.
  • the image display timing between the projection devices can be aligned based on the display timing information 128 from the outside, thereby suppressing the discomfort of the projected images.
  • FIG. 15 is a diagram showing an example of a connection state in a plurality of (four in this example) projection devices 120A to 120D connected to a computer 110.
  • the projection device 120A is communicably connected to the computer 110 via a communication line 11.
  • the projection device 120A and the projection device 120B are communicably connected via a communication line 12.
  • the projection device 120B and the projection device 120C are communicably connected via a communication line 13.
  • the projection device 120C and the projection device 120D are communicably connected via a communication line 14.
  • the projection device 120D and the projection device 120A are communicably connected via a communication line 15.
  • the communication unit 126 of the projection device 120A and the communication unit 126 of the projection device 120D are connected by the communication line 15.
  • the four projection devices 120A to 120D are connected in a ring shape by communication lines 12, 13, 14, and 15. Furthermore, the four projection devices 120A to 120D are connected so as to be capable of two-way communication.
  • image data sent from the computer 110 to the projection device 120A is sent from the projection device 120A to the projection device 120B via the communication line 12
  • the image data sent to the projection device 120B is sent from the projection device 120B to the projection device 120C via the communication line 13
  • the image data sent to the projection device 120C is sent from the projection device 120C to the projection device 120D via the communication line 14.
  • FIG. 16 is a diagram showing changes in the transmission path when an abnormality occurs in the projection system 100 connected as in FIG. 15. As shown in FIG. 16, for example, assume that an abnormality (marked with an x) occurs between the projection device 120B and the projection device 120C. The abnormality is the same as the abnormality described in the first embodiment.
  • projection device 120C When projection device 120C detects an abnormality, it transmits an abnormality occurrence signal to projection device 120A, for example wirelessly or via communication lines 14 and 15, notifying that an abnormality has occurred.
  • projection device 120B may detect an abnormality and transmit the abnormality occurrence signal to projection device 120A, for example wirelessly or via communication line 12.
  • projection device 120B or 120C that detects an abnormality may transmit an abnormality occurrence signal wirelessly to computer 110, and computer 110 may transmit the abnormality occurrence signal to projection device 120A via communication line 11 or wirelessly.
  • Projection device 120A which has received the abnormality occurrence signal, starts control to transmit image data to projection device 120D via communication line 15.
  • the image data transmitted to projection device 120D may be, for example, the first image data or the second image data.
  • projection device 120A maintains the transmission path that has been transmitting image data to projection device 120B via communication line 12, and continues to transmit image data to projection device 120B as before.
  • Projection device 120D which receives image data from projection device 120A, controls the transmission of the image data to projection device 120C via communication line 14. To explain this in relation to the configuration diagram of the projection device shown in FIG. 3, for example, when control unit 121 of projection device 120D detects that communication unit 126 has received image data from projection device 120A, it controls the transmission of the image data from communication unit 122 to communication unit 126 of projection device 120C.
  • Projection device 120D is an example of a first projection device in the present invention.
  • Projection device 120A is an example of a second projection device in the present invention.
  • the projection system 100 when the projection system 100 receives image data from the second projection device, which was the previous destination, it determines that the transmission path has been reversed, and transfers the image data to the first projection device, which was the previous source. This increases the degree of freedom of image display on the projection device 120 in the event of an abnormality.
  • FIG. 17 is a diagram showing an example of a connection state in a plurality of (four in this example) projection devices 120A to 120D connected to a computer 110.
  • the projection device 120A is communicably connected to the computer 110 via a communication line 11.
  • the projection device 120A and the projection device 120B are communicably connected to the computer 110 via a communication line 12.
  • the projection device 120B and the projection device 120C are communicably connected to the computer 110 via a communication line 13.
  • the projection device 120C and the projection device 120D are communicably connected to the computer 110 via a communication line 14.
  • the four projection devices 120A to 120D are daisy-chained to the computer 110 via the communication lines 12, 13, and 14 so as to be communicable.
  • the projection system 100 shown in FIG. 17 shows a normal state in which no abnormality occurs. In a normal state, the projection device 120A operates as a master projection device.
  • [Master projection device in an abnormal state] 18 is a diagram showing a state in which an abnormality (marked with an x) occurs between the projection device 120A and the projection device 120B.
  • the projection device 120B detects the abnormality and transmits an abnormality occurrence signal to the projection device 120A, for example, wirelessly.
  • the projection device 120B may transmit the abnormality occurrence signal to the computer 110 wirelessly.
  • the abnormality occurrence signal may be transmitted from the computer 110 to the projection device 120A.
  • projection device 120B When projection device 120B detects an abnormality (X mark), it sets its own projection device 120B, which is connected most upstream with respect to the position where the abnormality occurred, as the master projection device and transmits second image data (e.g., simplified version of the first image data) to projection device 120C via communication line 13.
  • Projection device 120C receives the second image data from projection device 120B and transmits the second image data to projection device 120D via communication line 14.
  • Projection devices 120B, 120C, and 120D each project a second image represented by the second image data.
  • Projection device 120A which is located upstream of the location where the abnormality occurred, continues to operate as the master projection device and projects the first image represented by the first image data received from computer 110.
  • an abnormality (marked with an x) occurring between projection device 120A and projection device 120B may be detected by projection device 120A and an abnormality occurrence signal may be transmitted to projection device 120B, for example, wirelessly.
  • projection device 120A may transmit an abnormality occurrence signal to computer 110.
  • an abnormality (marked with an x) occurs between projection device 120A and projection device 120B has been described, but each projection device will operate in the same way if an abnormality (marked with an x) occurs between projection device 120B and 120C, or between projection device 120C and 120D, for example.
  • FIG. 19 is a diagram showing a state in which an abnormality (marked with an x) occurs between the computer 110 and the projection device 120A.
  • the projection device 120A detects the abnormality and transmits an abnormality occurrence signal to the computer 110, for example, wirelessly.
  • projection device 120A When projection device 120A detects an abnormality (X mark), it sets its own projection device 120A, which is connected most upstream with respect to the position where the abnormality occurred, as the master projection device, and transmits second image data (e.g., simplified version of the first image data) to projection device 120B via communication line 12.
  • Projection device 120B which receives the second image data from projection device 120A, transmits the second image data to projection device 120C via communication line 13.
  • Projection device 120C which receives the second image data from projection device 120B, transmits the second image data to projection device 120D via communication line 14.
  • Projection devices 120A, 120B, 120C, and 120D each project a second image represented by the second image data.
  • a projection system 100 configured in this way, it is possible to quickly send image data from the master projection device to the projection device located downstream of the location where the abnormality occurred, making it possible to make image distortion less noticeable when an abnormality occurs.
  • the detection of communication anomalies described above may also be detection of anomalies in the received image data.
  • the abnormality if there is an abnormality in the received image data, it is believed that the abnormality has occurred somewhere in the communication path, so even if an abnormality is detected in the received image data, by performing the same control as when a communication anomaly is detected, it is possible to make image distortion less noticeable when an abnormality occurs.
  • the control method described in the above embodiment can be realized by executing a prepared control program on a computer.
  • This control program is recorded on a computer-readable storage medium and executed by reading it from the storage medium.
  • This control program may be provided in a form stored in a non-transitory storage medium such as a flash memory, or provided via a network such as the Internet.
  • the computer that executes this control program may be included in a control device, or may be included in an electronic device such as a smartphone, tablet terminal, or personal computer that can communicate with the control device, or may be included in a server device that can communicate with these control devices and electronic devices.
  • Projection system 110 Computer 110d, 120, 120A, 120B, 120C, 120D Projection device 111 Processor 112 Memory 113 Communication interface 114 User interface 119 Bus 120A to 120D Projection device 120a, 120b, 120c Projectable range 121
  • Control unit 122, 122a, 122b, 126 Communication unit 123, 123a, 123b Storage unit 124, 124a, 124b Selector 125 Projection unit 125a Light source 125b Light modulation unit 125c Projection optical system 125d
  • Control circuit 127 Display control unit 128 Display timing information 130, 130A, 130B, 130C Screen

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Abstract

L'invention concerne un dispositif de projection, un procédé de commande et un programme de commande qui peuvent rendre imperceptible une distorsion d'image si une anomalie se produit. La présente invention comprend : une unité de projection (125) ; une première unité de communication (122) pouvant communiquer avec un premier dispositif de projection ; une seconde unité de communication (126) pouvant communiquer avec un second dispositif de projection ; et une unité de commande (121). L'unité de commande (121) effectue : une commande visant à amener l'unité de projection (125) à projeter une image choisie parmi une première image qui est représentée par des premières données d'image reçues par la première unité de communication (122) en provenance du premier dispositif de projection ou une seconde image qui est représentée par des secondes données d'image différentes des premières données d'image ; et une commande visant à transmettre des données d'image des premières données d'image ou des secondes données d'image au second dispositif de projection à partir de la seconde unité de communication (126).
PCT/JP2023/038517 2022-11-25 2023-10-25 Dispositif de projection, procédé de commande et programme de commande WO2024111336A1 (fr)

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JP2022-188695 2022-11-25
JP2022188695 2022-11-25

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US20020047648A1 (en) * 1999-09-10 2002-04-25 Belliveau Richard S. Method and apparatus for digital communications with multiparameter light fixtures
JP2013160978A (ja) * 2012-02-07 2013-08-19 Seiko Epson Corp プロジェクター、及びプロジェクターの制御方法
JP2018004809A (ja) * 2016-06-29 2018-01-11 株式会社リコー 画像表示システム
JP2019092110A (ja) * 2017-11-16 2019-06-13 キヤノン株式会社 投影装置、通信装置、及びそれらの制御方法、プログラム、並びに投影システム
WO2020065755A1 (fr) * 2018-09-26 2020-04-02 Ｎｅｃディスプレイソリューションズ株式会社 Dispositif d'affichage, système à écrans multiples, procédé de transmission de signaux vidéo, et procédé d'affichage
US20200221061A1 (en) * 2017-08-16 2020-07-09 Samsung Electronics Co., Ltd. Server, display device and control method therefor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020047648A1 (en) * 1999-09-10 2002-04-25 Belliveau Richard S. Method and apparatus for digital communications with multiparameter light fixtures
JP2013160978A (ja) * 2012-02-07 2013-08-19 Seiko Epson Corp プロジェクター、及びプロジェクターの制御方法
JP2018004809A (ja) * 2016-06-29 2018-01-11 株式会社リコー 画像表示システム
US20200221061A1 (en) * 2017-08-16 2020-07-09 Samsung Electronics Co., Ltd. Server, display device and control method therefor
JP2019092110A (ja) * 2017-11-16 2019-06-13 キヤノン株式会社 投影装置、通信装置、及びそれらの制御方法、プログラム、並びに投影システム
WO2020065755A1 (fr) * 2018-09-26 2020-04-02 Ｎｅｃディスプレイソリューションズ株式会社 Dispositif d'affichage, système à écrans multiples, procédé de transmission de signaux vidéo, et procédé d'affichage

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