JP2020101655A - Display system, control method of display system and display device - Google Patents

Abstract

To capture a video from each of a plurality of video source output devices without using a video distributor and to display the plurality of captured videos.SOLUTION: A display system 1 includes projector 200A to projector 200D. The projector 200D includes: a first input unit to which a fourth input image PDn is input; a second input unit to which a third combined image SP3n is input from the projector 200C; an image processing unit which generates a fourth combined image SP4n on the basis of the fourth input image PDn and the third combined image SP3n; an output unit 284D which outputs the fourth combined image SP4n to the second input unit of the projector 200A; and a display control unit which displays a fourth projection image PJ4n of the fourth combined image SP4n by a projection unit 210D.SELECTED DRAWING: Figure 5

Description

The present invention relates to a display system, a display system control method, and a display device.

Conventionally, there is known a display system in which a plurality of display devices are connected by a cable and an image is displayed by the plurality of connected display devices (for example, see Patent Document 1).
The display system described in Patent Document 1 performs video transmission by performing cascade connection from a video source output device to a plurality of video display control devices, and performs video display. Of the multiple video display control devices, the upstream video display control device exchanges the control information and graphics data generated in the video area used by the upstream video display control device, which is not used by the downstream video display control device, and transmits it. To do. Of the multiple video display control devices, the downstream video display control device captures the control information and graphics data embedded in the video region used by the upstream video display control device, and also captures its own video display region. .. Then, the video display control device on the downstream side performs video display of its own video display area based on the control information and graphics data transmitted from the video display control device on the upstream side.

JP, 2017-142339, A

The display system described in Patent Document 1 does not include a configuration for capturing an image from each of a plurality of image source output devices and displaying the captured plurality of images.
Generally, in order to capture video from each of the multiple video source output devices and display the multiple captured video, it is expensive and complicated between the multiple video source output devices and the multiple video display control devices. It was necessary to arrange a video distributor which is a different device.

One aspect for solving the above-mentioned problems is a display system including a plurality of display devices, wherein any one of the plurality of display devices has a first input unit to which a first image is input. A second input unit to which a second image is input from another display device; an image processing unit that generates an output image based on the first image and the second image; and the output image to the other display unit. The display system includes an output unit that outputs to the second input unit included in the device, and a display control unit that causes the display unit to display an image satisfying a set condition among the second images.

In the above display system, the plurality of display devices are connected in a daisy chain, and the plurality of display devices output the output image to a first display device and the second input unit of the first display device. Identification information is added to the output image that is input to the first display device from the second display device, and each of the plurality of display devices is provided with the identification information by the display control unit. The output image provided with may be displayed on the display unit.

In the display system, when the identification information is added to the output image input to the second input unit, the display device displays the output image from the output unit with the identification information added. It may be configured to output.

In the display system, the image processing unit of the first display device may be configured to generate the output image that includes the first image and does not include the second image.

In the display system, the image processing unit of the first display device may be configured to superimpose the first image on a preset background image to generate the output image.

In the display system, each of the plurality of display devices may be configured such that the display control unit extracts a part of the output image to which the identification information is added and causes the display unit to display the extracted part.

In the above display system, k display devices from the first display device to the kth display device (k is a natural number of 2 or more) are sequentially daisy-chained via the second input unit and the output unit. The output unit of the k-th display device may be connected to the second input unit of the first display device.

In the above display system, a plurality of image supply devices for supplying an image to each of the plurality of display devices are provided, and each of the plurality of image supply devices is connected to the first input unit of each of the plurality of display devices. It may be configured.

In the display system, each of the display devices may be a projector that projects a projection image.

The display system may be a multi-projection system that forms one image by the plurality of projection images displayed by the plurality of display devices.

Another aspect for solving the above-mentioned problem is a display method of a display system including a plurality of display devices, wherein any one of the display devices of the plurality of display devices inputs to a first input unit. An image processing step of generating an output image based on a first image and a second image input to the second input unit from another display device, and the display device of any one of the plurality of display devices. An output step of outputting the output image to the second input unit of the other display device, and setting of the second image by the display device of any one of the plurality of display devices. And a display step of displaying an image satisfying the specified condition.

In the display method of the display system, the display device may display the output image to which identification information is added.

In the display method of the display system, when the identification information is attached to the output image input to the second input unit, the display device outputs the output image with the identification information attached. You may.

In the display method of the above display system, the display device may generate the output image including the first image and not including the second image.

In the display method of the above display system, the display device may generate the output image by superimposing the first image on a preset background image.

In the display method of the display system, the display device may extract a part of the output image to which the identification information is added and display the extracted part on the display unit.

In the display method of the display system, one image may be formed by a plurality of images displayed by the plurality of display devices.

Still another aspect for solving the above-mentioned problem is a display device included in a plurality of connected display devices, and a first input unit to which a first image is input, and another of the plurality of display devices. A second input unit to which a second image is input from the display device, and an output image based on the first image input to the first input unit and the second image input to the second input unit An image processing unit that outputs the output image to the other display device of the plurality of display devices; and a second image that is input to the second input unit. And a display control unit that causes the display unit to display a satisfying image.

The block diagram which shows the structure of a display system. The block diagram which shows the structure of an image output device. The block diagram which shows the structure of a projector. FIG. 3 is a configuration diagram showing a configuration of a control unit of the projector. The figure which shows the input information and output information of a projector. The sequence diagram which shows the synthetic image generation process of a display system. The sequence diagram which shows the projection process of a display system. Timing chart of the display system.

Hereinafter, the present embodiment will be described with reference to the drawings.

[1. Display system configuration]
FIG. 1 is a configuration diagram showing a configuration of the display system 1.
The display system 1 of this embodiment includes a plurality of image supply devices 100 and a plurality of projectors 200. FIG. 1 illustrates four projectors 200A, 200B, 200C, and 200D as the plurality of projectors 200. The number of projectors 200 included in the display system 1 is not limited to four. The number of projectors 200 may be two or more. The display system 1 includes k projectors 200 (k is a natural number of 2 or more).
Each of the projectors 200A to 200D has the same configuration as each other.
The projectors 200A to 200D correspond to an example of “plurality of display devices”. Each of the projectors 200A to 200D corresponds to an example of a “display device”.
In the following description, the projector 200A to the projector 200D may be referred to as the projector 200 when there is no particular need to distinguish between them.

FIG. 1 illustrates four image supply devices 100A, 100B, 100C, and 100D as the plurality of image supply devices 100. The number of image supply devices 100 configuring the display system 1 is not limited to four. The number of image supply devices 100 may be the same as the number of projectors 200.
The image supply device 100A is connected to the projector 200A. The image supply device 100B is connected to the projector 200B. The image supply device 100C is connected to the projector 200C. The image supply device 100D is connected to the projector 200D.
The image supply devices 100A to 100D correspond to an example of “a plurality of image supply devices”.
In the following description, the image supply device 100A to the image supply device 100D may be referred to as the image supply device 100 unless it is necessary to distinguish them.

The image supply device 100 supplies an HDMI (High-Definition Multimedia Interface) (registered trademark) signal to the projector 200. The HDMI signal includes image data and audio data. The image data may be moving image data or still image data. Further, the audio data may be monaural audio data or stereo audio data. In addition, surround-sound audio data that uses more audio channels than stereo may be used.

As the image supply device 100, for example, a notebook PC (Personal Computer), a desktop PC, a tablet terminal, a smartphone, a PDA (Personal Digital Assistant), or the like can be used. As the image supply device 100, a video reproducing device, a DVD (Digital Versatile Disk) player, a Blu-ray disc player, a hard disk recorder, a TV tuner device, a CATV (Cable television) set-top box, a video game machine, or the like may be used. ..

The projector 200A includes an HDMI communication unit 250A. The HDMI communication unit 250A includes a first reception unit 254A, a second reception unit 252A, and a transmission unit 256A. In FIG. 1, the receiving unit is described as “Rx” and the transmitting unit is described as “Tx”.
The first reception unit 254A is connected to the image supply device 100A by the HDMI cable 21A. The second receiving unit 252A is connected to the projector 200D by the HDMI cable 25. The transmitter 256A is connected to the projector 200B by the HDMI cable 22.

The first receiving unit 254A of the projector 200A receives the HDMI signal transmitted from the image supply device 100A. The second receiving unit 252A of the projector 200A receives the HDMI signal transmitted from the projector 200D.
The projector 200A takes in the received HDMI signal and executes various processes. The process executed by the projector 200A will be described later in detail with reference to FIGS. In addition, the transmission unit 256A of the projector 200A transmits the HDMI signal to the projector 200B.

The projector 200B includes an HDMI communication unit 250B. The HDMI communication unit 250B includes a first reception unit 254B, a second reception unit 252B, and a transmission unit 256B.
The first receiving unit 254B is connected to the image supply device 100B by the HDMI cable 21B. The second receiving unit 252B is connected to the projector 200A by the HDMI cable 22. The transmitter 256B is connected to the projector 200C by the HDMI cable 23.

The first receiving unit 254B of the projector 200B receives the HDMI signal transmitted from the image supply device 100B. The second receiving unit 252B of the projector 200B receives the HDMI signal transmitted from the projector 200A.
The projector 200B takes in the received HDMI signal and executes various processes. The process executed by the projector 200B will be described later in detail with reference to FIGS. In addition, the transmission unit 256B of the projector 200B transmits the HDMI signal to the projector 200C.

The projector 200C includes an HDMI communication unit 250C. The HDMI communication unit 250C includes a first reception unit 254C, a second reception unit 252C, and a transmission unit 256C.
The first reception unit 254C is connected to the image supply device 100C by the HDMI cable 21C. The second receiving unit 252C is connected to the projector 200B by the HDMI cable 23. The transmitter 256C is connected to the projector 200D by the HDMI cable 24.

The first reception unit 254C of the projector 200C receives the HDMI signal transmitted from the image supply device 100C. The second receiving unit 252C of the projector 200C receives the HDMI signal transmitted from the projector 200B.
The projector 200C captures the received HDMI signal and executes various processes. The process executed by the projector 200C will be described later in detail with reference to FIGS. In addition, the transmission unit 256C of the projector 200C transmits the HDMI signal to the projector 200D.

The projector 200D includes an HDMI communication unit 250D. The HDMI communication unit 250D includes a first reception unit 254D, a second reception unit 252D, and a transmission unit 256D.
The first reception unit 254D is connected to the image supply device 100D by the HDMI cable 21D. The second receiving unit 252D is connected to the projector 200C by the HDMI cable 24. The transmitter 256D is connected to the projector 200A by the HDMI cable 25.

The first reception unit 254D of the projector 200D receives the HDMI signal transmitted from the image supply device 100D. The second receiving unit 252D of the projector 200D receives the HDMI signal transmitted from the projector 200C.
The projector 200D takes in the received HDMI signal and executes various processes. The process executed by the projector 200D will be described later in detail with reference to FIGS. 3 to 8. Further, the transmission unit 256D of the projector 200D transmits the HDMI signal to the projector 200A.

The projectors 200A to 200D are daisy-chained by the HDMI cable 22, the HDMI cable 23, the HDMI cable 24, and the HDMI cable 25. In other words, the projectors 200A to 200D are connected by the HDMI cable 22 to the HDMI cable 25 so as to form one loop.
Specifically, the projectors 200A to 200D are connected as follows.
That is, the projector 200A and the projector 200B are connected by the HDMI cable 22. The projector 200B and the projector 200C are connected by the HDMI cable 23. The projector 200C and the projector 200D are connected by the HDMI cable 24. The projector 200D and the projector 200A are connected by the HDMI cable 25.

Each of the HDMI cables 21 to 25 has a data line for transmitting image data, audio data, and control information. These data lines are three data lines of TMDS (Transition Minimized Differential Signaling) channels #0, #1, and #2. These data lines are data lines that serially transmit the HDMI signal, which is a differential signal, in one direction.
In addition, each of the HDMI cables 21 to 25 has a CEC (Consumer Electronics Control) line and a DDC (Display Data Channel) line. The CEC line is a signal line for bidirectionally transmitting control data between devices connected to the HDMI cable. The DDC lines are two signal lines used for reading E-EDID (Enhanced Extended Display Identification Data). E-EDID is device information that specifies a sink device that is a device on the side of receiving an HDMI signal.

FIG. 1 shows a case where the projectors 200A to 200D are arranged in a row in the horizontal direction, and each projector 200 projects images on the screen SC side by side. The projector 200A projects the image on the projection area 10A of the screen SC, and the projector 200B projects the image on the projection area 10B of the screen SC. Further, the projector 200C projects the image on the projection area 10C of the screen SC, and the projector 200D projects the image on the projection area 10D of the screen SC. Projecting an image on the screen SC by the projectors 200A to 200D corresponds to "display".

The display system 1 combines the images projected by the projectors 200A to 200D on the screen SC, and performs tiling projection to project one large-screen image on the screen SC. One large-screen image corresponds to an example of “one image”.
That is, in the tiling projection, the adjacent projectors 200 are arranged so that the images projected by the projection unit 210 are combined on the screen SC.

Further, in the tiling projection, the projector 200 projects the image such that the edge of the image to be projected overlaps the edge of the image to be projected by the adjacent projector 200. This is to make the boundaries of the projected image inconspicuous. For example, the image projected by the projector 200A and the image projected by the projector 200B located on the right side of the image overlap each other to form the overlapping region 11. Similarly, the image projected by the projector 200B and the image projected by the projector 200C located on the right side overlap each other to form the overlapping region 12. Similarly, the image projected by the projector 200C and the image projected by the projector 200D located on the right side of the image overlap each other to form the overlapping region 13.

In addition, in the present embodiment, the case where the projection target on which the projectors 200A to 200D project an image is the screen SC will be described as an example, but the projection target is not limited to the screen SC. The projection target may be a uniform flat surface, a curved surface, a discontinuous surface, a surface having irregularities, or the like. Specifically, the wall surface of the building or the surface of the object can be the projection target.
Further, the installation method of the projectors 200A to 200D is not limited to the flat installation, and it is also possible to perform ceiling installation in which the projectors 200A to 200D are suspended from the ceiling or wall installation in which the projectors 200A to 200D are hung on the wall.
Further, FIG. 1 shows a case where the projectors 200A to 200D are arranged side by side in a horizontal row (horizontal arrangement), but the projectors 200A to 200D may be arranged in a vertical row (vertical arrangement). Alternatively, two projectors 200A to 200D may be arranged in the horizontal direction and two in the vertical direction (two rows and two columns).

In addition, in the present embodiment, the images projected by the projectors 200A to 200D are combined on the screen SC, and tiling projection is performed to project one large-screen image on the screen SC, but the present invention is not limited to this. Any multi-projection system that forms one image by the four projected images displayed by the projectors 200A to 200D may be used. For example, four projection images displayed by the projectors 200A to 200D may be superimposed on each other and projected onto one projection region to form one projection image with high brightness. One projection area is, for example, the projection area 10B.

[2. Configuration of image supply device]
FIG. 2 is a configuration diagram showing the configuration of the image supply device 100. Since the configurations of the image supply devices 100A to 100D are the same, the configuration of the image supply device 100A will be described below, and the description of each of the image supply devices 100B to 100D will be omitted. To do.
The image supply device 100A includes a control unit 110A, a reproduction unit 120A, a recording medium 130A, and an HDMI (registered trademark) communication unit 140A.
The control unit 110A controls the image supply device 100A. The recording medium 130A is configured by a DVD, a Blu-ray (registered trademark) disc, or the like, and stores image data, audio data, and the like of content.
The reproduction unit 120A reproduces the content recorded on the recording medium 130A under the control of the control unit 110A. Further, the reproduction unit 120A outputs the image data and the audio data of the reproduced content to the HDMI communication unit 140A.
The HDMI communication unit 140A converts the image data and the audio data input from the reproduction unit 120A into an HDMI signal having a predetermined transmission format under the control of the control unit 110A. The HDMI communication unit 140A outputs the HDMI signal to the HDMI cable 21A under the control of the control unit 110A.
The reproducing unit 120A may reproduce contents stored in a semiconductor storage device such as a flash memory, a magnetic storage device such as an HDD (Hard Disk Drive), or a magneto-optical storage device. Further, the content downloaded from the server device on the network may be played back by the playback unit 120A.

[3. Projector configuration]
FIG. 3 is a configuration diagram showing a configuration of the projector 200A. Since the configurations of the projectors 200A to 200D are the same, the configuration of the projector 200A will be described below, and the description of each of the projectors 200B to 200D will be omitted.
Further, in the following description, in order to distinguish the constituent elements of each projector 200, the constituent elements of the projector 200A are denoted by the reference numeral "A", and the constituent elements of the projector 200B are denoted by the reference numeral "B". Similarly, the constituent elements of the projector 200C will be described with reference numerals “C”, and the constituent elements of the projector 200D will be described with reference numeral “D”.
For example, the control unit of the projector 200A is described as a control unit 280A, and the control unit of the projector 200B is described as a control unit 280B. Similarly, the control unit of the projector 200C is described as a control unit 280C, and the control unit of the projector 200D is described as a control unit 280D.

The HDMI communication unit 250A of the projector 200A includes a first reception unit 254A, a second reception unit 252A, and a transmission unit 256A.
The first receiving unit 254A includes a connection terminal that connects to the HDMI cable 21A and an interface circuit that processes the received HDMI signal and converts it into image data, audio data, and control information.
The second receiving unit 252A includes a connection terminal that connects to the HDMI cable 25, and an interface circuit that processes the received HDMI signal and converts it into image data, audio data, and control information.
The transmission unit 256A also includes a connection terminal that connects to the HDMI cable 22 and an interface circuit that converts image data, audio data, and control information into an HDMI signal.

The projector 200A includes a projection unit 210A that forms an optical image and projects the image on the screen SC. The projection unit 210A includes a light source unit 211A, a light modulator 212A, and a projection optical system 213A. The projection unit 210A corresponds to an example of a “display unit”.
The light source unit 211A includes a light source including a xenon lamp, an ultra-high pressure mercury lamp, an LED (Light Emitting Diode), a laser light source, and the like. In addition, the light source unit 211A may include a reflector and an auxiliary reflector that guide the light emitted from the light source to the light modulator 212A. Further, the light source unit 211A may include a lens group for enhancing the optical characteristics of the projected light, a polarizing plate, or a light control element for reducing the amount of light emitted from the light source on the path to the light modulation device 212A. Good.

The light source unit 211A is driven by the light source driving unit 221A. The light source driving unit 221A is connected to the internal bus 290A, and turns on and off the light source of the light source unit 211A under the control of the control unit 280A which is also connected to the internal bus 290A.

The light modulation device 212A includes, for example, three liquid crystal panels 215A corresponding to the three primary colors of R, G, and B. R indicates red, G indicates green, and B indicates blue. That is, the light modulation device 212A includes a liquid crystal panel 215A compatible with R color light, a liquid crystal panel 215A compatible with G color light, and a liquid crystal panel 215A compatible with B color light.
The light emitted from the light source unit 211A is separated into three color lights of RGB, and is incident on the corresponding liquid crystal panel 215A. Each of the three liquid crystal panels 215A is a transmissive liquid crystal panel and modulates transmitted light to generate image light. The image light that has passed through each liquid crystal panel 215A and is modulated is combined by a combining optical system such as a cross dichroic prism and is emitted to the projection optical system 213A.

The light modulator 212A is driven by the light modulator driver 222A. The optical modulator driving unit 222A is connected to the internal bus 290A.
Image data corresponding to each of the primary colors of R, G, and B is input from the image processing unit 260A to the light modulator driving unit 222A. The light modulator driving unit 222A converts the input image data into a data signal suitable for the operation of the liquid crystal panel 215A. The light modulator driving unit 222A applies a voltage to each pixel of each liquid crystal panel 215A based on the converted data signal, and draws an image on each liquid crystal panel 215A.

The projection optical system 213A includes a lens group that projects the image light modulated by the light modulator 212A onto the screen SC and forms an image on the screen SC. Further, the projection optical system 213A may include a zoom mechanism for enlarging or reducing an image projected on the screen SC, and a focus adjusting mechanism for adjusting the focus.

The projector 200A includes an operation panel 231A, a remote control light receiving unit 235A, and an input processing unit 233A. The operation panel 231A and the remote controller light receiving unit 235A are connected to the input processing unit 233A connected to the internal bus 290A.
The operation panel 231A is provided with various operation keys for operating the projector 200A. The operation panel 231A is provided with, for example, a power key for instructing power-on or power-off of the projector 200A, a menu key for performing various settings, and the like. When the operation key is operated, the input processing unit 233A outputs an operation signal corresponding to the operated key to the control unit 280A.

Further, the projector 200A has a remote controller 5 used by the user. The remote controller 5 has various buttons, and transmits an infrared signal in response to the operation of these buttons.
The remote control light receiver 235A receives the infrared signal transmitted from the remote control 5. The input processing unit 233A decodes the infrared signal received by the remote controller light receiving unit 235A, generates an operation signal indicating the operation content of the remote controller 5, and outputs the operation signal to the control unit 280A.

The projector 200A includes an audio processing unit 240A and a speaker 243A.
The audio processing unit 240A performs signal processing such as decoding, D/A conversion, and amplification on the audio data, converts the audio data into an analog audio signal, and outputs the analog audio signal to the speaker 243A.

The projector 200A includes a wireless communication unit 247A. The wireless communication unit 247A is connected to the internal bus 290A and operates according to the control of the control unit 280A.
The wireless communication unit 247A includes an antenna, an RF (Radio Frequency) circuit, and the like (not shown), and executes wireless communication with an external device under the control of the control unit 280A. As a wireless communication system of the wireless communication unit 247A, for example, a short-range wireless communication system such as a wireless LAN (Local Area Network), Bluetooth (registered trademark), UWB (Ultra Wide Band), and infrared communication can be adopted. Further, a wireless communication system using a mobile phone line can be adopted as the wireless communication system of the wireless communication unit 247A.

The projector 200A includes an image processing system. This image processing system is mainly configured by a control unit 280A that integrally controls the entire projector 200A, and in addition to this, includes an image processing unit 260A, a frame memory 265A, and a storage unit 270A. The control unit 280A, the image processing unit 260A, and the storage unit 270A are connected to each other via an internal bus 290A so that data communication can be performed therebetween.

The image processing unit 260A expands the image data received from the image supply device 100 in the frame memory 265A and processes it. The processing performed by the image processing unit 260A includes, for example, resolution conversion processing or resizing processing, shape correction processing such as distortion correction, digital zoom processing, color tone correction processing, and brightness correction processing. The image processing unit 260A executes the process designated by the control unit 280A, and performs the process using the parameters input from the control unit 280A as necessary. Further, the image processing section 260A can of course execute a combination of a plurality of the processes described above. The image processing unit 260A reads the processed image data from the frame memory 265A and outputs the image data to the optical modulator driving unit 222A.

The storage unit 270A is, for example, an auxiliary storage device such as a hard disk device. The storage unit 270A is replaced with an optical disc such as a DRAM (Dynamic RAM), a flash memory capable of storing a large amount of information, or a CD (Compact Disc), a DVD (Digital Versatile Disc), and a BD (Blu-ray Disc). Good. The storage unit 270A stores a control program executed by the control unit 280A and various data.
The storage unit 270A also stores individual information of each of the projectors 200A to 200D. The same applies to each of the storage units 270B to 270D.
The individual information of the projector 200A may be input by the user operating the operation panel 231A, or the device information of the projector 200A read from the E-EDID via the DDC line may be used.

The control unit 280A controls each unit of the projector 200A. The control unit 280A includes a processor such as a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and other peripheral circuits as hardware.
The ROM is a non-volatile storage device such as a flash ROM and stores a control program and data. The RAM is used as a work area when the CPU performs arithmetic processing. The processor expands the control program read from the ROM or the storage unit 270A into the RAM and executes the expanded control program to control each unit of the projector 200A. The configuration of the control unit 280A will be described later in detail with reference to FIG.

FIG. 4 is a configuration diagram showing a configuration of the control unit 280A of the projector 200A and a configuration of the control unit 280B of the projector 200B.
Since the configurations of the control units 280B to 280D are the same, the configuration of the control unit 280B will be described, and the description of the control units 280C and 280D will be omitted.
The projector 200A corresponds to an example of “first display device”. The projector 200D corresponds to an example of “second display device”. Further, each of the projectors 200B to 200D corresponds to an example of “a display device of any one of the plurality of display devices”.

The control unit 280A includes a first input unit 281A, a second input unit 282A, an image processing unit 283A, an output unit 284A, and a display control unit 285A.
Specifically, the processor of the control unit 280A executes the control program read from the ROM or the storage unit 270A, so that the first input unit 281A, the second input unit 282A, the image processing unit 283A, the output unit 284A, and the display unit. It functions as the control unit 285A.

The first input image PAn is input to the first input unit 281A from the image supply device 100A. Specifically, the first receiving unit 254A receives the HDMI signal transmitted from the image supply apparatus 100A, and the first input unit 281A receives the first input image PAn included in the HDMI signal received by the first receiving unit 254A. Is entered. The symbol “n” included in the reference numeral of the first input image PAn indicates that it is an image of the nth frame. The first input image PAn corresponds to an example of “first image”. Note that “n” is a natural number of 2 or more.

The fourth combined image SP4n is input to the second input unit 282A from the projector 200D. Specifically, the second receiving unit 252A receives the HDMI signal transmitted from the projector 200D, and the fourth input image 282A receives the fourth composite image SP4n included in the HDMI signal received by the second receiving unit 252A. To be done. The symbol “n” included in the reference numeral of the fourth combined image SP4n indicates that it is the image of the nth frame. The fourth combined image SP4n corresponds to an example of “second image”. The fourth composite image SP4n will be described later in detail with reference to FIG.

The image processing unit 283A changes the flag FL of the fourth combined image SP4n to “1” when the flag FL of the fourth combined image SP4n input to the second input unit 282A is “0”. The flag FL corresponds to an example of “identification information”. Specifically, the state in which the flag FL is set to “1” corresponds to an example of “state in which identification information is added”. The state in which the flag FL is set to “0” corresponds to an example of “state in which identification information is not added”.
The image processing unit 283A generates a first combined image SP1n that includes the first input image PAn and does not include the fourth combined image SP4n.
Specifically, the image processing unit 283A sets the first input image PAn to a preset background image when the flag FL of the fourth combined image SP4n input to the second input unit 282A is “0”. The first composite image SP1n is generated by combining with PG. Further, the image processing unit 283A adds “0” as the flag FL to the first combined image SP1n.
The symbol "n" included in the reference numeral of the first combined image SP1n indicates that it is an image of the nth frame. The first combined image SP1n corresponds to an example of “output image”. The first composite image SP1n will be described later in detail with reference to FIG.

The output unit 284A outputs the first combined image SP1n to the second input unit 282 included in another projector 200.
Specifically, when the flag FL of the fourth combined image SP4n input to the second input unit 282A is “0”, the output unit 284A sets the flag FL to “1” and then outputs to the second input unit. The fourth combined image SP4n input to 282A is output to the second input unit 282B included in the projector 200B.
When the flag FL of the fourth combined image SP4n input to the second input unit 282A is “1”, the output unit 284A outputs the first combined image SP1(n+1) to the second input unit 282B included in the projector 200B. Output to.
The symbol “n+1” included in the reference numeral of the first combined image SP1(n+1) indicates that it is the image of the (n+1)th frame.

The display control unit 285A causes the projection unit 210A to display an image that satisfies the set conditions among the fourth combined image SP4n input to the second input unit 282A.
Specifically, when the flag FL of the fourth combined image SP4n input to the second input unit 282A is “0”, the display control unit 285A extracts the first projection image PJ1n from the fourth combined image SP4n. Then, it is displayed on the projection unit 210A.
The first projection image PJ1n corresponds to an example of “a part of the output image”. In the present embodiment, the “set condition” is to be included in a preset region of the fourth combined image SP4n. The symbol “n” included in the reference numeral of the first projection image PJ1n indicates that it is an image of the nth frame.
When the flag FL of the fourth combined image SP4n input to the second input unit 282A is “1”, the display control unit 285A executes the following process. That is, the display control unit 285A causes the projection unit 210A to continuously display the first projection image PJ1n until the projector 200D inputs the fourth combined image SP4(n+1) to the second input unit 282A.
The symbol “n+1” included in the reference numeral of the fourth combined image SP4(n+1) indicates that it is the image of the (n+1)th frame.
For example, the first projection image PJ1n is an image included in the leftmost region of the four regions generated by uniformly dividing the fourth combined image SP4n into four regions in the width direction. That is, in the present embodiment, the “set condition” is included in the leftmost region of the four regions generated by dividing the fourth combined image SP4n into four regions evenly in the width direction. Is.
The first projection image PJ1n will be described later in detail with reference to FIG.

The control unit 280B includes a first input unit 281B, a second input unit 282B, an image processing unit 283B, an output unit 284B, and a display control unit 285B.
Specifically, the processor of the control unit 280B executes the control program read from the ROM or the storage unit 270B, so that the first input unit 281B, the second input unit 282B, the image processing unit 283B, the output unit 284B, and the display unit. It functions as the control unit 285B.

The second input image PBn is input to the first input unit 281B from the image supply device 100B. Specifically, the first receiving unit 254B receives the HDMI signal transmitted from the image supply device 100B, and the first input unit 281B receives the second input image PBn included in the HDMI signal received by the first receiving unit 254B. Is entered. The symbol “n” included in the reference numeral of the second input image PBn indicates that it is the image of the nth frame. The second input image PBn corresponds to an example of “first image”.
The third input image PCn input from the image supply device 100C to the first input unit 281C corresponds to an example of “first image”. Further, the fourth input image PDn input from the image supply device 100D to the first input unit 281D corresponds to an example of “first image”.

The first combined image SP1n or the fourth combined image SP4n is input to the second input unit 282B from the projector 200A.
Specifically, the second receiving unit 252B receives the HDMI signal transmitted from the projector 200A, and the second input unit 282B has the first combined image SP1n included in the HDMI signal received by the second receiving unit 252B. Alternatively, the fourth combined image SP4n is input. In addition, "1" is given as the flag FL to the fourth combined image SP4n.
The first combined image SP1n corresponds to an example of “second image”. The first combined image SP1n is generated by the image processing unit 283A of the projector 200A. The first composite image SP1n will be described later in detail with reference to FIG.

The image processing unit 283B generates the second combined image SP2n based on the second input image PBn and the first combined image SP1n when the first combined image SP1n is input from the projector 200A to the second input unit 282B. The second composite image SP2n corresponds to an example of “output image”. Specifically, the image processing unit 283B synthesizes the second input image PBn with the first synthetic image SP1n to generate the second synthetic image SP2n. Further, the image processing unit 283B adds “0” as the flag FL to the second combined image SP2n.
The symbol “n” included in the reference numeral of the second composite image SP2n indicates that it is the image of the nth frame. The second composite image SP2n will be described later in detail with reference to FIG.
When the fourth combined image SP4n is input from the projector 200A to the second input unit 282B, the image processing unit 283B does not execute the process on the fourth combined image SP4n.

The output unit 284B outputs the second combined image SP2n to the second input unit 282 included in another projector 200.
Specifically, when the first combined image SP1n is input to the second input unit 282B from the projector 200A, the output unit 284B outputs the second combined image SP2n to the second input unit 282C included in the projector 200C. To do.
Further, when the fourth combined image SP4n is input from the projector 200A to the second input unit 282B, the output unit 284B outputs the fourth combined image SP4n to the second input unit 282C included in the projector 200C. In addition, "1" is given as the flag FL to the fourth combined image SP4n.

The display control unit 285B causes the projection unit 210B to display an image satisfying the set conditions among the fourth combined image SP4n.
Specifically, when the fourth composite image SP4n is input from the projector 200A to the second input unit 282B, the display control unit 285B extracts the second projection image PJ2n from the fourth composite image SP4n and projects the projection unit 210B. To display. “1” is given as the flag FL to the fourth combined image SP4n.
When the first combined image SP1n is input from the projector 200A to the second input unit 282B, the display control unit 285B executes the following process. That is, the display control unit 285B continuously displays the second projection image PJ2(n-1) on the projection unit 210B until the fourth composite image SP4n is input from the projector 200A to the second input unit 282B. .. The symbol "n-1" included in the reference numeral of the second projection image PJ2(n-1) indicates that it is the image of the (n-1)th frame.
In other words, when the first composite image SP1n is input from the projector 200A to the second input unit 282B, the display control unit 285B executes the process of displaying a part of the first composite image SP1n on the projection unit 210B. do not do. This is because "0" is given as the flag FL to the first combined image SP1n.
The second projection image PJ2n corresponds to an example of “a part of the output image”. In the present embodiment, the “set condition” is to be included in a preset region of the fourth combined image SP4n. The symbol "n" included in the reference numeral of the second projection image PJ2n indicates that it is the image of the nth frame.
For example, the second projection image PJ2n is an image included in the second region from the left of the four regions generated by uniformly dividing the fourth combined image SP4n into four regions in the width direction. That is, in the present embodiment, the “set condition” is that the fourth combined image SP4n is evenly divided into four areas in the width direction, and the fourth combined image SP4n is the second area from the left of the generated four areas. It is included.
The second projection image PJ2n will be described later in detail with reference to FIG.

[4. Projector input and output]
FIG. 5 is a diagram showing input information and output information of each of the projectors 200A to 200D.
FIG. 6 is a sequence diagram showing the “composite image generation process” of the display system 1. The “composite image generation process” refers to a process of generating the first composite image SP1n to the fourth composite image SP4n.
FIG. 7 is a sequence diagram showing the “projection process” of the display system 1. The “projection process” refers to a process of outputting the first projection image PJ1n to the fourth projection image PJ4n.
5 to 7, each of the projector 200A to the projector 200D until the first input image PAn to the fourth input image PDn of the nth frame are input and the first projection image PJ1n to the fourth projection image PJ4n are output. The contents of the process, input information, and output information will be described.

As shown in FIGS. 5 and 6, first, in step S101, the first input image PAn is input from the image supply device 100A to the first reception unit 254A of the projector 200A.
Then, in step S103, the image processing unit 283A of the control unit 280A generates the first combined image SP1n based on the first input image PAn and the background image PG.
Specifically, the image processing unit 283A adjusts the first input image PAn to the preset size S1 and then arranges the first input image PAn at the preset position P1 of the background image PG to thereby reduce the first input image PAn. It is combined with the background image PG to generate a first combined image SP1n.
Next, in step S105, the output unit 284A of the control unit 280A transmits the first combined image SP1n from the transmission unit 256A to the projector 200B.

Next, in step S107, the second input image PBn is input from the image supply device 100B to the first reception unit 254B of the projector 200B, and the second reception unit 252B of the projector 200B is input from the projector 200A to the first composite image SP1n. Is entered.
Then, in step S109, the image processing unit 283B of the control unit 280B generates the second combined image SP2n based on the second input image PBn and the first combined image SP1n.
Specifically, the image processing unit 283B adjusts the second input image PBn to the preset size S2, and then arranges the second input image PBn at the preset position P2 of the first composite image SP1n, whereby the second input image PBn is arranged. PBn is combined with the first combined image SP1n to generate a second combined image SP2n.
In this embodiment, the size S2 is larger than the size S1, and the position P2 is set to the left of the position P1.
Next, in step S111, the output unit 284B of the control unit 280B transmits the second combined image SP2n from the transmission unit 256B to the projector 200C.

Next, in step S113, the third input image PCn is input from the image supply device 100C to the first reception unit 254C of the projector 200C, and the second reception image 252C of the projector 200C is input from the projector 200B to the second composite image SP2n. Is entered.
Then, in step S115, the image processing unit 283C of the control unit 280C generates the third combined image SP3n based on the third input image PCn and the second combined image SP2n.
Specifically, the image processing unit 283C adjusts the third input image PCn to the preset size S3, and then arranges the third input image PCn at the preset position P3 of the second composite image SP2n, whereby the third input image PCn is arranged. PCn is combined with the second combined image SP2n to generate a third combined image SP3n.
In this embodiment, the size S3 is larger than the sizes S1 and S2, and the position P3 is set rightward with respect to the positions P1 and P2.
Next, in step S117, the output unit 284C of the control unit 280C transmits the third combined image SP3n from the transmission unit 256C to the projector 200D.

Next, in step S119, the fourth input image PDn is input from the image supply device 100D to the first reception unit 254D of the projector 200D, and the second reception unit 252D of the projector 200D is input from the projector 200C to the third composite image SP3n. Is entered.
Then, in step S121, the image processing unit 283D of the control unit 280D generates the fourth combined image SP4n based on the fourth input image PDn and the third combined image SP3n, and sets the fourth combined image SP4n flag FL to “0. Set to.
Specifically, the image processing unit 283D adjusts the fourth input image PDn to a preset size S4, and then arranges it at the preset position P4 of the third composite image SP3n, whereby the fourth input image PDn is arranged. PDn is combined with the third combined image SP3n to generate a fourth combined image SP4n.
In this embodiment, the size S4 is larger than the sizes S1, S2, and S3, and the position P4 is set between the positions P1 and P2.
Next, in step S123, the output unit 284D of the control unit 280D transmits the fourth combined image SP4n from the transmission unit 256D to the projector 200A.

Next, as shown in FIGS. 5 and 7, in step S201, the fourth combined image SP4n is input from the projector 200D to the second reception unit 252A of the projector 200A. In addition, the image processing unit 283A changes the flag FL of the fourth combined image SP4n input to the second input unit 282A from “0” to “1”.
Next, in step S203, the display control unit 285A extracts the first projection image PJ1n from the fourth combined image SP4n and causes the projection unit 210A to display it.
Specifically, the first projection image PJ1n is, for example, an image included in the leftmost region of the four regions generated by dividing the fourth combined image SP4n into four regions evenly in the width direction. is there. In the present embodiment, the first projection image PJ1n includes the second input image PBn and a part of the fourth input image PDn. Here, a part of the fourth input image PDn is the left end portion of the fourth input image PDn.
Next, in step S205, the output unit 284A of the control unit 280A transmits the fourth combined image SP4n from the transmission unit 256A to the projector 200B.

Next, in step S207, the fourth combined image SP4n to which “1” is added as the flag FL is input from the projector 200A to the second reception unit 252B of the projector 200B.
Next, in step S209, the display control unit 285B extracts the second projection image PJ2n from the fourth combined image SP4n and causes the projection unit 210B to display the second projection image PJ2n.
Specifically, the second projection image PJ2n is included in the second region from the left of the generated four regions, for example, by dividing the fourth composite image SP4n into four regions evenly in the width direction. This is the image. In the present embodiment, the second projection image PJ2n includes a part of the fourth input image PDn. Here, a part of the fourth input image PDn is the central portion of the fourth input image PDn.
Next, in step S211, the output unit 284B of the control unit 280B transmits the fourth combined image SP4n from the transmission unit 256B to the projector 200C.

Next, in step S213, the second receiving unit 252C of the projector 200C is input from the projector 200B with the fourth combined image SP4n to which “1” is added as the flag FL.
Next, in step S215, the display control unit 285C extracts the third projection image PJ3n from the fourth combined image SP4n and causes the projection unit 210C to display it.
Specifically, the third projection image PJ3n is included in a third region from the left of the generated four regions, for example, by dividing the fourth combined image SP4n into four regions evenly in the width direction. This is the image. In the present embodiment, the third projection image PJ3n includes the first input image PAn, a part of the third input image PCn, and a part of the fourth input image PDn. Here, a part of the third input image PCn is the left end of the third input image PCn, and a part of the fourth input image PDn is the right end of the fourth input image PDn.
Next, in step S217, the output unit 284C of the control unit 280C transmits the fourth combined image SP4n from the transmission unit 256C to the projector 200D.

Next, in step S219, the second reception unit 252D of the projector 200D receives the fourth combined image SP4n to which “1” is added as the flag FL from the projector 200C.
Next, in step S221, the display control unit 285D extracts the fourth projection image PJ4n from the fourth combined image SP4n and causes the projection unit 210D to display it.
Specifically, the fourth projection image PJ4n is, for example, an image included in the rightmost region of the four regions generated by equally dividing the fourth combined image SP4n into four regions in the width direction. is there. In the present embodiment, the fourth projection image PJ4n includes a part of the third input image PCn. Here, a part of the third input image PCn is an image excluding the left end portion of the third input image PCn.

Each of step S109, step S115, and step S121 corresponds to an example of “image processing step”. Each of step S111, step S117, and step S123 corresponds to an example of “output step”. Each of step S209, step S215, and step S221 corresponds to an example of a “display step”.

As described with reference to FIGS. 5 to 7, each of the first input image PAn to the fourth input image PDn is input to each of the projectors 200A to 200D from each of the image supply devices 100A to 100D. To be done. Then, in the projector 200A, the first input image PAn and the background image PG are combined to generate the first combined image SP1n. In the projector 200B, the second input image PBn and the first combined image SP1n are combined to generate the second combined image SP2n. In the projector 200C, the third input image PCn and the second combined image SP2n are combined to generate the third combined image SP3n. In the projector 200D, the fourth input image PDn and the third combined image SP3n are combined to generate a fourth combined image SP4n.
In this way, the fourth combined image SP4n in which the background image PG and the first input image PAn to the fourth input image PDn are combined can be generated.

FIG. 8 is a timing chart of the display system 1. The horizontal axis of FIG. 8 indicates the time T.

[5. Projection processing timing]
As shown in FIG. 8, at time T0, the first receiving unit 254A of the projector 200A receives the first input image PAn from the image supply device 100A, and the second receiving unit 252A receives the fourth combined image SP4(from the projector 200D). n-1) is received.
In addition, "0" is given as the flag FL to the fourth combined image SP4(n-1). The symbol "n-1" included in the reference numeral of the fourth combined image SP4(n-1) indicates that it is the image of the (n-1)th frame.
In addition, the display control unit 285A extracts the first projection image PJ1(n-1) from the fourth combined image SP4(n-1), and at time T1, the projection unit 210A has the first projection image PJ1(n). -1) is displayed.
In addition, the image processing unit 283A changes the flag FL of the fourth combined image SP4(n-1) from "0" to "1", and at time T1, the transmission unit 256A causes the fourth combined image SP4(n-1) to be generated. Is transmitted to the projector 200B.
In FIG. 8, the flag FL attached to the received image is described as an input flag FL, and the flag FL attached to the image to be transmitted is described as an output flag FL.

Further, at time T1, the second receiving unit 252B of the projector 200B receives the fourth combined image SP4(n-1) from the projector 200A. In addition, "1" is given to the fourth combined image SP4(n-1) as the flag FL.
Further, the display control unit 285B extracts the second projection image PJ2(n-1) from the fourth combined image SP4(n-1), and at time T2, the projection unit 210B causes the second projection image PJ2(n). -1) is displayed.
Further, at time T2, the transmission unit 256B transmits the fourth combined image SP4(n-1) to the projector 200C.
Note that the process of changing the value of the flag FL is not executed in each of the projectors 200B to 200D. Therefore, in the processing corresponding to each of the projectors 200B to 200D in FIG. 8, the value of the input flag FL or the output flag FL is described.

Further, at time T2, the second receiving unit 252C of the projector 200C receives the fourth combined image SP4(n-1) from the projector 200B. In addition, "1" is given to the fourth combined image SP4(n-1) as the flag FL.
In addition, the display control unit 285C extracts the third projection image PJ3(n-1) from the fourth combined image SP4(n-1), and at time T3, the projection unit 210C causes the third projection image PJ3(n). -1) is displayed.
In addition, at time T3, the transmission unit 256C transmits the fourth combined image SP4(n-1) to the projector 200D.

Further, at time T3, the second reception unit 252D of the projector 200D receives the fourth combined image SP4(n-1) from the projector 200C. In addition, "1" is given to the fourth combined image SP4(n-1) as the flag FL.
Further, the display control unit 285D extracts the fourth projection image PJ4(n-1) from the fourth combined image SP4(n-1), and at time T4, the projection unit 210D causes the fourth projection image PJ4(n). -1) is displayed.
In addition, at time T4, the transmission unit 256C transmits the fourth combined image SP4(n-1) to the projector 200A.

[6. Timing of composite image generation processing]
Further, the image processing unit 283A of the projector 200A synthesizes the first input image PAn and the background image PG to generate the first synthesized image SP1n, and at time T6, the transmission unit 256A projects the first synthesized image SP1n to the projector. Send to 200B.

Further, at time T6, the second receiving unit 252B of the projector 200B receives the first combined image SP1n from the projector 200A. In addition, since "0" is given as the flag FL to the first combined image SP1n, no projection image is generated from the first combined image SP1n.
Then, the image processing unit 283B of the projector 200B combines the second input image PBn and the first combined image SP1n to generate the second combined image SP2n. At time T7, the transmission unit 256B causes the second combined image SP2n to be generated. Is transmitted to the projector 200C.

Further, at time T7, the second receiving unit 252C of the projector 200C receives the second combined image SP2n from the projector 200B. In addition, since “0” is given as the flag FL to the second combined image SP2n, no projection image is generated from the second combined image SP2n.
Then, the image processing unit 283C of the projector 200C combines the third input image PCn and the second combined image SP2n to generate the third combined image SP3n, and at time T8, the transmission unit 256C causes the third combined image SP3n to be generated. Is transmitted to the projector 200D.

Further, at time T8, the second reception unit 252D of the projector 200D receives the third combined image SP3n from the projector 200C. In addition, since “0” is given as the flag FL to the third combined image SP3n, no projection image is generated from the third combined image SP3n.
Then, the image processing unit 283D of the projector 200D combines the fourth input image PDn and the third combined image SP3n to generate the fourth combined image SP4n, and at time T9, the transmission unit 256D causes the fourth combined image SP4n to be generated. Is transmitted to the projector 200A.

As described above, in the present embodiment, each of the projectors 200A to 200D among the projectors 200A to 200D has the first input unit 281, the second input unit 282, the image processing unit 283, and the output unit 284. And a display control unit 285.
Of the projectors 200B to 200D, for example, the projector 200B will be described. That is, the projector 200B includes a first input unit 281B, a second input unit 282B, an image processing unit 283B, an output unit 284B, and a display control unit 285B.
The second input image PBn is input to the first input unit 281B. The first combined image SP1n is input to the second input unit 282B from the projector 200A. The image processing unit 283B generates the second combined image SP2n based on the second input image PBn and the first combined image SP1n. The output unit 284B outputs the second combined image SP2n to the second input unit 282C included in the projector 200C. The display control unit 285B causes the projection unit 210B to display an image that satisfies the set conditions in the second combined image SP2n.
Since the second composite image SP2n includes the first input image PAn and the second input image PBn, the display control unit 285B, for example, selects at least one of the first input image PAn and the second input image PBn. You can display images that include.
Therefore, an image including at least one of the first input image PAn and the second input image PBn can be displayed without using the video distributor.

Further, in the present embodiment, the projectors 200A to 200D are connected in a daisy chain, and the projector 200D outputs the fourth combined image SP4n to the second input unit 282A of the projector 200A. The projector 200A corresponds to an example of “first display device”. The projector 200D corresponds to an example of “second display device”.
In each of the projectors 200B to 200D, the display control unit 285 causes the projection unit 210 to display a part of the fourth combined image SP4n to which “1” is added as the flag FL.
Therefore, according to the value of the flag FL, the display control unit 285 can determine whether to generate a projection image from the composite image and display the projection image by the projection unit 210. For example, when the fourth combined image SP4n to which “1” is added as the flag FL is received, the display control unit 285 causes the projection unit 210 to display a part of the fourth combined image SP4n. Further, for example, when the first combined image SP1n to the third combined image SP3n to which “0” is added as the flag FL is received, the display control unit 285 sets the first combined image SP1n to the third combined image SP3n. The process of displaying the copy by the projection unit 210 is not executed. Therefore, it is possible to set whether or not a part of the composite image is displayed by the projection unit 210 with a simple configuration.

Further, in the present embodiment, the image processing unit 283A of the projector 200A generates the first combined image SP1n that includes the first input image PAn and does not include the fourth combined image SP4(n−1). The first input image PAn corresponds to an example of “first image”. The fourth combined image SP4(n-1) is an image input from the second input unit 282A and corresponds to an example of the "second image".
Therefore, when the fourth combined image SP4(n-1) is input from the second input unit 282A, the first combined image SP1n that does not include the fourth combined image SP4(n-1) can be generated. Therefore, it is possible to prevent the images of different frames from being combined by the image processing unit 283.

Further, in the present embodiment, the image processing unit 283A of the projector 200A superimposes the first input image PAn on the preset background image PG to generate the first combined image SP1n.
Therefore, for example, by setting the position P1 of the first input image PAn with respect to the background image PG, the position P1 of the first input image PAn with respect to the background image PG can be determined as the position desired by the user. Further, for example, by setting the size S1 of the first input image PAn with respect to the background image PG, the size S1 of the first input image PAn with respect to the background image PG can be determined as the size desired by the user. Therefore, user convenience can be improved.

Further, in the present embodiment, each of the projectors 200A to 200D extracts, by the display control unit to the display control unit 285D, a part of the fourth composite image SP4n to which the flag FL indicating “1” is added, for example. And display it on the projection units 210A to 210D.
The fourth composite image SP4n includes the first input image PAn to the fourth input image PDn.
Therefore, each of the projectors 200A to 200D can display an image including any one of the first input image PAn to the fourth input image PDn. Therefore, each of the projectors 200A to 200D can display an image including at least one of the first input image PAn to the fourth input image PDn without using the video distributor.

Further, in the present embodiment, four projectors 200 from the projector 200A to the projector 200D are sequentially connected in a daisy chain via the second input unit 282A to the second input unit 282D and the output unit 284 to the output unit 284D. .. Further, the output unit 284D of the projector 200D is connected to the second input unit 282A of the projector 200A.
In the present embodiment, the projector 200D corresponds to an example of the “kth display device”. “K” is “4”.
Therefore, the fourth combined image SP4n can be supplied to each of the projectors 200A to 200D. Therefore, each of the projectors 200A to 200D can display an image including at least one of the first input image PAn to the fourth input image PDn without using the video distributor.

In addition, in the present embodiment, each of the “display devices” is a projector that projects a projection image.
Therefore, for example, by superimposing and displaying the images of the projectors 200A to 200D in one area, one image with high brightness can be displayed.

Further, in the present embodiment, the display system 1 is a multi-projection system that forms one image by the first projection image PJ1n to the fourth projection image PJ4n displayed by each of the projectors 200A to 200D.
Therefore, for example, one image can be formed by arranging each of the first projection image PJ1n to the fourth projection image PJ4n in the horizontal direction.

Further, in the present embodiment, each of the projectors 200B to 200D among the projectors 200A to 200D has a first input unit 281, a second input unit 282, an image processing unit 283, an output unit 284, and a display. And a control unit 285.
Of the projectors 200B to 200D, for example, the projector 200B will be described. That is, the projector 200B includes a first input unit 281B, a second input unit 282B, an image processing unit 283B, an output unit 284B, and a display control unit 285B.
The display method in the display system 1 includes an image processing step, an output step, and a display step.
The second input image PBn is input to the first input unit 281B. The first combined image SP1n is input to the second input unit 282B from the projector 200A. The image processing unit 283B executes the "image processing step" of generating the second combined image SP2n based on the second input image PBn and the first combined image SP1n. The output unit 284B executes an “output step” of outputting the second combined image SP2n to the second input unit 282C included in the projector 200C. The display control unit 285B executes a “display step” that causes the projection unit 210B to display an image that satisfies the set conditions in the second combined image SP2n.
Since the second composite image SP2n includes the first input image PAn and the second input image PBn, the display control unit 285B, for example, selects at least one of the first input image PAn and the second input image PBn. You can display images that include.
Therefore, an image including at least one of the first input image PAn and the second input image PBn can be displayed without using the video distributor.

Further, in the present embodiment, each of the projectors 200B to 200D among the projectors 200A to 200D has a first input unit 281, a second input unit 282, an image processing unit 283, an output unit 284, and a display. And a control unit 285.
Of the projectors 200B to 200D, for example, the projector 200B will be described. That is, the projector 200B includes a first input unit 281B, a second input unit 282B, an image processing unit 283B, an output unit 284B, and a display control unit 285B. Each of the projectors 200B to 200D corresponds to an example of a “display device”.
The second input image PBn is input to the first input unit 281B. The first combined image SP1n is input to the second input unit 282B from the projector 200A. The image processing unit 283B generates the second combined image SP2n based on the second input image PBn and the first combined image SP1n. The output unit 284B outputs the second combined image SP2n to the second input unit 282C included in the projector 200C. The display control unit 285B causes the projection unit 210B to display an image that satisfies the set conditions in the second combined image SP2n.
Since the second composite image SP2n includes the first input image PAn and the second input image PBn, the display control unit 285B, for example, selects at least one of the first input image PAn and the second input image PBn. You can display images that include.
Therefore, an image including at least one of the first input image PAn and the second input image PBn can be displayed without using the video distributor.

[7. Other Embodiments]
It should be noted that the above-described present embodiment is merely an example of the embodiment, does not limit the embodiment, and may have different modes.
In the present embodiment, for example, the projector 200 is shown as an example of the display device, but the display device may be a liquid crystal monitor that displays images on a liquid crystal display panel, a liquid crystal television, or the like. Further, it may be a device including an organic EL display panel such as a plasma display panel, an OLED (Organic Light-Emitting Diode), and an OEL (Organic Electro Luminescence) display.

Further, in the present embodiment, the configuration in which the light modulation device 212A includes the liquid crystal panel 215A is illustrated, but the liquid crystal panel 215A may be a transmissive liquid crystal panel or a reflective liquid crystal panel. .. Further, the light modulation device 212A may be configured to use a digital mirror device (DMD) instead of the liquid crystal panel 215A. Further, a configuration in which a digital mirror device and a color wheel are combined may be adopted. In addition to the liquid crystal panel and the DMD, the light modulation device 212A may employ a configuration capable of modulating the light emitted from the light source.

Further, in the present embodiment, the display system 1 is configured by connecting four projectors 200 in a daisy chain, but the present invention is not limited to this. The display system 1 may be configured by connecting N (N is a natural number of 2 or more) daisy chains. For example, the display system 1 may be configured by connecting two or three projectors 200 in a daisy chain, or may be configured by connecting five or more projectors 200 in a daisy chain.

In addition, in the present embodiment, the image processing unit 283A combines the first input image PAn with the background image PG to generate the first combined image SP1n, but the present invention is not limited to this. The image processing unit 283A may generate an image including the first input image PAn. For example, the image processing unit 283A may generate the first input image PAn as the first combined image SP1n.

Further, in the present embodiment, the image processing unit 283B combines the second input image PBn with the first combined image SP1n to generate the second combined image SP2n, but the present invention is not limited to this. The image processing unit 283B may generate an image including the first input image PAn and the second input image PBn. For example, the image processing unit 283B may generate an image in which the first input image PAn and the second input image PBn are combined as the second combined image SP2n.

Further, in the present embodiment, the image processing unit 283C combines the third input image PCn with the second combined image SP2n to generate the third combined image SP3n, but the present invention is not limited to this. The image processing unit 283C may generate an image including the first input image PAn, the second input image PBn, and the third input image PCn. For example, the image processing unit 283C may generate an image in which the first input image PAn, the second input image PBn, and the third input image PCn are combined as the third combined image SP3n.

Further, in the present embodiment, the image processing unit 283D combines the fourth input image PDn with the third combined image SP3n to generate the fourth combined image SP4n, but the present invention is not limited to this. The image processing unit 283D may generate an image including the first input image PAn, the second input image PBn, the third input image PCn, and the fourth input image PDn. For example, the image processing unit 283D may generate an image in which the first input image PAn, the second input image PBn, the third input image PCn, and the fourth input image PDn are combined as the fourth combined image SP4n.

Further, each functional unit of the projector 200A shown in FIG. 3 and each functional unit of the control unit 280A shown in FIG. 4 show a functional configuration, and a specific mounting form is not particularly limited. In other words, it is not always necessary to individually implement hardware corresponding to each functional unit, and it is of course possible to implement a function of a plurality of functional units by executing a program by one processor. Further, in the above embodiment, some of the functions realized by software may be realized by hardware, and some of the functions realized by hardware may be realized by software. In addition, the specific detailed configurations of other parts of the projector can be arbitrarily changed without departing from the gist of the invention.

The processing units in the sequence diagrams shown in FIGS. 6 and 7 are divided according to the main processing contents in order to facilitate understanding of the processing of the projector 200 or the display system 1. The embodiment is not limited by the division method or name of the processing unit shown in the sequence diagrams of FIGS. 6 and 7. Further, the processing of the control unit 280 can be divided into more processing units according to the processing content, or can be divided so that one processing unit includes more processing. Further, the processing order of the above sequence diagram is not limited to the illustrated example.

The control method of the display system 1 can be realized by causing a computer included in each display device of the display system 1 to execute a program corresponding to the control method of the display system 1. In addition, this program can be recorded in a recording medium that is readable by a computer. A magnetic or optical recording medium or a semiconductor memory device can be used as the recording medium. Specifically, a flexible disk, a CD-ROM (Compact Disk Read Only Memory), a DVD, a Blu-ray (registered trademark) Disc, a magneto-optical disk, a flash memory, a portable recording medium such as a card type recording medium, or a fixed type. A recording medium is mentioned. Further, the recording medium may be a non-volatile storage device such as RAM, ROM, HDD, which is an internal storage device included in the image display device. In addition, a program corresponding to the control method of the display system 1 is stored in a server device or the like, and the control method of the display system 1 is realized by downloading the program from the server device to each display device of the display system 1. Can also

DESCRIPTION OF SYMBOLS 1... Display system, 10A-10D... Projection area, 21A-21D... HDMI cable, 22-25... HDMI cable, 100, 100A-100D... Image supply device, 110A... Control part, 120A... Reproduction part, 130A... Recording medium , 140A... HDMI communication unit, 200, 200A to 200D... Projector (display device), 210, 201A to 210D... Projection unit (display unit), 250, 250A to 250D... HDMI communication unit, 252, 252A to 252D... Second Reception unit, 254, 254A to 254D... First reception unit, 256, 256A to 256D... Transmission unit, 260A... Image processing unit, 265A... Frame memory, 270A... Storage unit, 280, 280A to 280D... Control unit, 281, 281A to 281D... 1st input part, 282, 282A to 282D... 2nd input part, 283, 283A to 283D... Image processing part, 284, 284A to 284D... Output part, 285, 285A to 285D... Display control part, 290A ... internal bus, FL... Flag, PAn... First input image (first image), PBn... Second input image (first image), PCn... Third input image (first image), PDn... Fourth input image (First image), PG... Background image, PJ1n... First projection image, PJ2n... Second projection image, PJ3n... Third projection image, PJ4n... Fourth projection image, P1-P4... Position, SC... Screen, SP1n ... first composite image (second image, output image), SP2n... second composite image (second image, output image), SP3n... third composite image (second image, output image), SP4n... fourth composite image (Second image, output image).

Claims (18)

A display system having a plurality of display devices,
The display device of any one of the plurality of display devices,
A first input section to which the first image is input;
A second input unit for receiving the second image from the other display device;
An image processing unit that generates an output image based on the first image and the second image;
An output unit that outputs the output image to the second input unit included in another display device;
A display control unit that causes the display unit to display an image that satisfies a set condition among the second images;
And a display system. The plurality of display devices are daisy-chained,
The plurality of display devices include a first display device and a second display device that outputs the output image to the second input unit of the first display device,
Identification information is added to the output image input from the second display device to the first display device,
The display system according to claim 1, wherein each of the plurality of display devices causes the display control unit to cause the display unit to display the output image to which the identification information has been added. The display device outputs the output image from the output unit in a state where the identification information is added, when the identification information is added to the output image input to the second input unit. 2. The display system described in 2. The display system according to claim 2, wherein the image processing unit of the first display device generates the output image that includes the first image and does not include the second image. The display system according to claim 4, wherein the image processing unit of the first display device superimposes the first image on a preset background image to generate the output image. The display control unit of each of the plurality of display devices extracts a part of the output image to which the identification information is added and causes the display unit to display the extracted part of the output image. Display system described. The k display devices from the first display device to the kth display device (k is a natural number of 2 or more) are sequentially connected in a daisy chain via the second input unit and the output unit,
The output unit of the kth display device is connected to the second input unit of the first display device,
The display system according to any one of claims 2 to 6. A plurality of image supply devices for supplying images to each of the plurality of display devices,
Each of the plurality of image supply devices is connected to the first input unit of each of the plurality of display devices,
The display system according to any one of claims 1 to 7. The display system according to any one of claims 1 to 8, wherein each of the display devices is a projector that projects a projection image. The display system according to claim 9, wherein the display system is a multi-projection system that forms one image by the plurality of projection images displayed by the plurality of display devices. A display method for a display system including a plurality of display devices, comprising:
Output from one of the plurality of display devices based on a first image input to the first input unit and a second image input to the second input unit from another display device. An image processing step for generating an image,
An output step of outputting the output image to the second input unit of another display device by the display device of any one of the plurality of display devices;
A display step of displaying, by the display device of any one of the plurality of display devices, an image that satisfies a set condition among the second images;
And a display method of a display system including. The display method according to claim 11, wherein the display device displays the output image to which identification information is added. 13. The display according to claim 12, wherein the display device outputs the output image in a state where the identification information is added, when the identification information is added to the output image input to the second input unit. How to display the system. The display method according to claim 12, wherein the display device generates the output image that includes the first image and does not include the second image. The display method according to claim 14, wherein the display device superimposes the first image on a preset background image to generate the output image. The display method of the display system according to claim 12, wherein the display device extracts and displays a part of the output image to which the identification information is added. The display method of the display system according to claim 11, wherein one image is formed by a plurality of images displayed by the plurality of display devices. A display device included in a plurality of connected display devices,
A first input section to which the first image is input;
A second input unit for receiving a second image from the other display device of the plurality of display devices;
An image processing unit that generates an output image based on the first image input to the first input unit and the second image input to the second input unit;
An output unit that outputs the output image to the other display device of the plurality of display devices,
A display control unit that causes a display unit to display an image satisfying a set condition among the second images input to the second input unit;
And a display device.

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