JP2015172707A - Display control device, display device, multi-monitor system, display control method of display device, and display method of display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a plurality of video signals on display devices constituted as a multi-display system, without using a synthesizer.SOLUTION: A display control device of a display device includes: a first transmission unit which transmits a main video signal, a main video signal change size, and divided area allocation information to another display device connected to a succeeding stage of the display device in a daisy chain; a division position information generation unit which obtains division position information indicative of a divided area for a slave video signal; a display position generation unit which obtains a display position indicative of a position on a display screen of the slave video signal in the case of display of a video image including the main video signal and the slave video signal on the whole of a plurality of display devices in a multi-screen system; and a second transmission unit which transmits the slave video signal, a slave video signal change size indicative of a change size for changing a screen size for the slave video signal to a size corresponding to the multi-screen system, the division position information, and the display position to the display device connected to the succeeding stage.

Description

  The present invention relates to a display control device, a display device, a multi-monitor system, a display control method for a display device, and a display method for a display device.

  A public display (hereinafter referred to as PD) or projector (hereinafter referred to as PJ) has a technique of installing a multi-screen (daisy chain connection) and displaying a large image on the entire display screen. When such a multi-screen is installed, if a special video synthesizer is used, a separate screen (PIP (Picture in Picture), PBP (Picture by Picture), POP (PICTURE OUTSIDE PICTURE)) can be used in any size and position. Can be displayed. For example, Patent Document 1 discloses a system in which a display device is installed on multiple screens. In this system, the screen control device controls the entire multi-display configured by a plurality of element screens, thereby displaying an image on the multi-display.

  As another example of multi-screen installation, there is a technique for displaying another screen on the entire screen of the PD installed in multi-screen. For example, there is a system in which a synthesizer is connected to two video signal generators, and a video device corresponding to the head is connected to the synthesizer among n × m video devices connected in a daisy chain. In this system, video signals are input to the synthesizer from each of the video signal generators. The synthesizer displays the video of the second video signal at a smaller size than the video of the first video signal at the center of the video of the first video signal of the two video signals. Here, as the video size, for example, the video size of the first video signal is 1024 × 768, and the video size of the second video signal is 512 × 384. The synthesizer displays the video of the second video signal on the video of the first video signal so that the video signals input from the two video signal generators are aligned with each other. And the synthesized video is supplied to the video equipment. Here, one synthesized video signal is input to the video equipment. Such a synthesizer changes the position for displaying the second video signal and the size of the video as necessary, and synthesizes the video, and transmits the synthesized video to the video equipment. The video equipment enlarges the input video signal so as to fit the size of the entire screen installed in the multi-screen. Then, the video device displays a video corresponding to an area displayed by itself on the entire display screen of the video device installed in the multi-screen among the enlarged video.

JP 2004-177614 A

  However, in the above-described technique, when a PD or PJ is installed in multiple screens (daisy chain) and a separate screen is displayed, a synthesizer is required. That is, it is necessary to synthesize a plurality of video signals to generate one video signal and supply it to each video device. Therefore, when the multi-screen is installed, there is a problem that another screen cannot be displayed in a free size and position unless a combiner is used.

  The present invention has been made in view of such circumstances, and its purpose is to provide a display control device, a display device, and a display device that do not require a synthesizer that synthesizes a video signal to be installed separately from a multi-screen display device. To provide a multi-monitor system, a display control method for a display device, and a display method for a display device.

  In order to solve the above-described problem, the first aspect of the present invention is to provide a main video signal obtained from a video signal generator and a change size for changing the screen size of the main video signal to a size corresponding to multi-screen installation. A main video signal change size to be represented, and a main video signal changed according to the change size according to each installation position of each display device installed in the multi-screen, and a divided region in which a divided region is assigned to each of the display devices A first transmission unit that transmits the allocation information to a display device that is daisy chain-connected to the subsequent stage of the allocation information; and a video that includes the main video signal and one or more sub video signals obtained from the video signal generation device A division position information generation unit that obtains division position information representing an area into which the sub-video signal is divided when dividing according to the multi-screen installation; A display position generation unit for obtaining a display position representing a position on the display screen of the slave video signal when the video including the master video signal and the slave video signal is displayed on the entire plurality of display devices installed on the multi-screen; The slave video signal, a slave video signal change size representing a change size for changing the screen size of the slave video signal to a size corresponding to the multi-screen installation, the division position information, and the display position, And a second transmitter that transmits to a display device connected to the subsequent stage.

  In addition, according to a second aspect of the present invention, in the display device described above, the display position generation unit displays a video including the main video signal and the sub video signal over the plurality of display devices installed in the multi-screen. Change to the size to be displayed, divide the video after the size is changed according to each installation position of the plurality of display devices installed on the multi-screen, assign the divided area to each of the display devices, When the assigned video includes an area corresponding to the secondary video signal, a display position indicating a position on the display screen of the secondary video signal included in the assigned area may be obtained.

  According to a third aspect of the present invention, there is provided the display control device according to the first aspect or the second aspect described above, and an image of an area corresponding to the divided area allocation information in the main video signal changed according to the changed size. In addition to displaying on the display unit, the sub video signal is changed to the sub video signal change size, the division position information, and the display position according to whether or not the display of the main video signal is assigned to its own display device. Based on the above, it is possible to obtain a display device having an output video control unit for displaying on its own display unit.

  According to a fourth aspect of the present invention, there is provided a main video signal change size representing a main video signal supplied from a video signal generator and a change size for changing the screen size of the main video signal to a size corresponding to multi-screen installation. And divided area allocation information that divides the main video signal changed according to the changed size according to each installation position of each display device installed in the multi-screen and allocates a divided area to each of the display control devices, An image including a first receiving unit that receives from a display device connected in a daisy chain in front of itself, one or more sub video signals, the main video signal, and a sub video signal obtained from the video signal generator. When dividing according to the multi-screen installation, division position information indicating an area into which the sub video signal is divided, the main video signal, and the sub video The display position indicating the position of the sub video signal on the display screen when the video including the signal is displayed on the whole of the plurality of display devices installed on the multi screen, and the screen size of the sub video signal are set to the multi screen installation. A secondary video signal change size representing a change size to be changed to a corresponding size, a second receiving unit that receives from the display control device connected in a daisy chain at its previous stage, and a main video signal changed according to the change size The video of the area corresponding to the divided area allocation information is displayed on the display unit, and the slave video signal is changed to the slave video signal according to whether the slave video signal is assigned to display on its display device. And an output video control unit to display on its own display unit based on the size, the division position information, and the display position.

  According to a fifth aspect of the present invention, there is provided a multi-monitor system including a plurality of display devices connected in series, wherein the display device serving as a master among the plurality of display devices is obtained from a video signal generator. A main video signal, a main video signal change size representing a change size for changing a screen size of the main video signal to a size corresponding to the multi-screen installation, and a main video signal changed according to the change size. A first transmission unit that transmits divided area allocation information that is divided according to each installation position of each display device and that assigns a divided area to each of the display devices, to a display device that is daisy chain connected to the subsequent stage of the first transmission unit And an image including the main video signal and one or more sub video signals obtained from the video signal generator. A division position information generating unit that obtains division position information indicating an area where the sub video signal is divided, and a video including the main video signal and the sub video signal is installed on the multi-screen. A display position generation unit for obtaining a display position representing a position on the display screen of the slave video signal when the entire display device is displayed, the slave video signal, and the screen size of the slave video signal are installed on the multi-screen. A second transmission unit that transmits the sub-picture signal change size representing the change size to be changed to a size corresponding to the above, the division position information, and the display position to the display device connected to the subsequent stage, and the change size Of the main video signal changed in accordance with the divisional area allocation information is displayed on the display unit, and the sub-video signal is displayed on its own display device. An output video control unit that displays the sub video signal on its display unit based on the sub video signal change size, the division position information, and the display position, depending on whether the sub video signal is assigned, A display device that is a slave among the plurality of display devices, wherein the main video signal, the main video signal change size, and the divided region allocation information are displayed from a display device connected to the preceding stage of the display device. A first receiving unit that receives the second video signal, the division position information, the display position, and the second video signal change size from a display device that is daisy chain-connected to the first stage; The receiving unit displays the video of the area corresponding to the divided area allocation information among the main video signal changed according to the changed size on the display unit provided therein, and the sub video signal is displayed on its display device. An output video control unit that displays the sub video signal on a display unit included in the sub video signal based on the sub video signal change size, the division position information, and the display position according to whether or not an indication is assigned It is characterized by having.

  According to a sixth aspect of the present invention, there is provided a main video signal obtained from a video signal generator, a main video signal change size representing a change size for changing the screen size of the main video signal to a size corresponding to multi-screen installation, Dividing the main video signal changed according to the changed size according to each installation position of each display device installed on the multi-screen and assigning a divided region to each of the display devices; When transmitted to a display device connected in a daisy chain to the subsequent stage, and dividing the video including the main video signal and one or more sub video signals obtained from the video signal generator according to the multi-screen installation, Division position information indicating a region into which the sub video signal is divided is obtained, and an image including the main video signal and the sub video signal is displayed on the multi-screen. A display position representing a position on the display screen of the sub video signal when displaying on the plurality of display devices installed on the screen, and the multi-screen installation of the sub video signal and the screen size of the sub video signal The sub-picture signal change size indicating the change size to be changed to a size corresponding to the above, the division position information, and the display position are transmitted to the display device connected to the subsequent stage.

  According to a seventh aspect of the present invention, there is provided a main video signal obtained from a video signal generator, a main video signal change size representing a change size for changing a screen size of the main video signal to a size corresponding to multi-screen installation, Dividing the main video signal changed according to the changed size according to each installation position of each display device installed on the multi-screen and assigning a divided region to each of the display devices; When transmitted to a display device connected in a daisy chain to the subsequent stage, and dividing the video including the main video signal and one or more sub video signals obtained from the video signal generator according to the multi-screen installation, Division position information indicating a region into which the sub video signal is divided is obtained, and an image including the main video signal and the sub video signal is displayed on the multi-screen. A display position representing a position on the display screen of the sub video signal when displaying on the plurality of display devices installed on the screen, and the multi-screen installation of the sub video signal and the screen size of the sub video signal The sub-picture signal change size representing the change size to be changed to the size corresponding to the image, the division position information, and the display position are transmitted to the display device connected to the subsequent stage, and the main image changed according to the change size The video of the area corresponding to the divided area allocation information in the video signal is displayed on the display unit, and the sub video signal is converted into the sub video depending on whether or not the sub video signal is assigned to display on its own display device. Based on the video signal change size, the division position information, and the display position, display is performed on its own display unit.

  According to an eighth aspect of the present invention, there is provided a main video signal change size representing a main video signal supplied from a video signal generator and a change size for changing the screen size of the main video signal to a size corresponding to multi-screen installation. And divided area allocation information for dividing the main video signal changed according to the changed size according to each installation position of each display device installed in the multi-screen and assigning a divided area to each of the display devices, An image including one or a plurality of sub video signals, the main video signal, and the sub video signal obtained from the video signal generation device, received from the display control device connected in a daisy chain in the preceding stage of the multi-screen installation When the video is divided accordingly, division position information indicating an area into which the sub video signal is divided, and the main video signal and the sub video signal are included. Is changed to a size corresponding to the multi-screen installation, and a display position representing the position of the sub-video signal on the display screen when the image is displayed on the entire plurality of display devices installed on the multi-screen. The sub video signal change size representing the change size to be received is received from the display control device connected in a daisy chain in the previous stage of the self video signal, and the area corresponding to the divided area allocation information of the main video signal changed according to the change size is received. While displaying the video on the display unit, depending on whether or not the display of the secondary video signal is assigned to its own display device, the secondary video signal, the secondary video signal change size, the division position information, Based on the display position, it is displayed on its own display unit.

  As described above, according to the present invention, another screen can be displayed in an arbitrary size and position without using a special video synthesizer.

It is a schematic block diagram which shows the structure of the display control apparatus by one Embodiment of this invention. It is a schematic block diagram showing the function of the display apparatus in 2nd Embodiment. 3 is a functional block diagram illustrating a schematic configuration of a display device 200 connected as a slave to the display device 100. FIG. It is a figure showing the installation state of the display apparatus 100 and the display apparatus 200. FIG. 4 is a flowchart for explaining operations of the display device 100 and the display device 200. It is a figure explaining the display position and display size of a sub screen. It is a figure explaining the position and magnitude | size which display a video signal on each display apparatus. It is a conceptual diagram explaining the display system installed in the multi-screen in 3rd Embodiment. It is a conceptual diagram showing the structure of the display system in 4th Embodiment. It is a conceptual diagram showing the structure of the display system in 5th Embodiment.

Hereinafter, a display control apparatus according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic block diagram showing a configuration of a display control apparatus according to an embodiment of the present invention.
The control device 10 includes a first transmission unit 11, a divided position information generation unit 12, a display position information generation unit 13, and a second transmission unit 14.
The first transmission unit 11 according to the main video signal obtained from the video signal generator, the main video signal change size representing the change size for changing the screen size of the main video signal to a size corresponding to the multi-screen installation, and the change size The changed main video signal is divided in accordance with each installation position of each display device installed on a multi-screen and divided area allocation information for assigning a divided area to each display device is daisy-chain connected to its subsequent stage. Send to display device.
The division position information generation unit 12 is an area in which the sub video signal is divided when a video including the main video signal and one or more sub video signals obtained from the video signal generator is divided according to multi-screen installation. Is obtained.
The display position generation unit 13 obtains a display position that represents the position of the sub video signal on the display screen when the video including the main video signal and the sub video signal is displayed on the entire plurality of display devices installed on the multi-screen.
The second transmission unit 14 includes a sub video signal, a sub video signal change size representing a change size for changing the screen size of the sub video signal to a size corresponding to the multi-screen installation, the division position information, and the display position. It transmits to the display device connected to the latter stage.

  The display control device according to the first embodiment can be provided in any of the multi-connected display devices, or can be connected to the outside of each multi-connected display device.

Next, a second embodiment will be described. FIG. 2 is a schematic block diagram illustrating functions of the display device according to the second embodiment.
In the display device 100, the multi-connection control unit 101 communicates with each display device installed on a multi-screen. Here, for example, four display devices are connected in a daisy chain, the display device 100 is a master display device, and the other three display devices are connected to the rear stage of the display device 100 as slave display devices. In addition, the multi-connection control unit 101 communicates with the slave display device, obtains array information representing the array position of each display device installed on the multi-screen, and obtains the first video signal allocation unit 111 and the divided position information generation unit. And 121.

The first video signal input unit 110 inputs a first video signal output from the video signal generator 20 connected to the outside.
The first video signal allocation unit 111 includes a first video signal change size representing a change size for changing the screen size of the first video signal obtained from the first video signal input unit 110 to a size corresponding to the multi-screen installation, and a change The first video signal changed according to the size is divided according to each installation position of each display device installed in a multi-screen, and divided region allocation information for assigning a divided region to each display device is generated. As the function of the first video signal allocating unit 111, a display function in a general multi-screen installation can be used.

  The first transmission unit 112 includes a first video signal obtained from the first video signal input unit 110, a first video signal change size generated by the first video signal allocation unit 111, and a first video signal allocation unit 111. The generated divided area allocation information is transmitted to a display device connected in a daisy chain at its subsequent stage.

The second video signal input unit 120 inputs a second video signal output from the video signal generator 30 connected to the outside.
The division position information generation unit 121 generates division position information representing an area into which the second video signal is divided when a video including the first video signal and the second video signal is divided according to the multi-screen installation. .

  The display position information generation unit 122 displays the position of the second video signal on the display screen when displaying the video including the first video signal and the second video signal on the entire plurality of display devices installed on the multi-screen. Get position. More specifically, for example, the display position information generation unit 122 changes the image including the first video signal and the second video signal to a size that is displayed on the entire plurality of display devices installed in a multi-screen, and the size is The changed video is divided according to each installation position of a plurality of display devices installed on a multi-screen, the divided areas are assigned to the respective display devices, and the assigned video corresponds to the second video signal. When the area to be displayed is included, a display position representing the position on the display screen of the second video signal included in the allocated area is generated.

  The changed size generation unit 123 generates a second video signal change size for changing the screen size of the second video signal to a size corresponding to multi-screen installation.

  As the functions of the division position information generation unit 121, the display position information generation unit 122, and the changed size generation unit 123, for example, a sub-screen display function can be used. Here, the sub-screen represents a screen for displaying PIP or PBP on the display device.

  The second transmission unit 124 transmits the second video signal, the second video signal change size, the division position information, and the display position to the slave display device connected in the subsequent stage.

The first video control unit 125 changes the size of the first video signal according to the first video signal change size, and the video of the area of the first video signal after the change, the allocation of which is determined by the divided area allocation information. Get.
The second video control unit 126 changes the size of the second video signal according to the changed size, divides the second video signal according to the division position information, and determines a display position to be displayed on the display screen according to the display position information.

  The output video control unit 127 displays the video of the region corresponding to the divided region allocation information in the first video signal changed according to the changed size on the display unit 128, and the second video signal is displayed on its display device. The second video signal is displayed on its own display unit 128 based on the second video signal change size, the division position information, and the display position, depending on whether or not it has been assigned.

  The display unit 128 has a function of displaying an image. For example, when the display device 100 is a liquid crystal display device, the display unit 128 is a liquid crystal display panel. When the display device 100 is a projector, the display unit 128 includes a light source of a projector that projects an image on a screen, a liquid crystal panel, a projection lens, and the like, and projects a video signal on the screen.

FIG. 3 is a functional block diagram illustrating a schematic configuration of the display device 200 connected as a slave to the display device 100.
The multi-connection control unit 205 communicates with the display device 100 serving as a master and a display device serving as a slave connected to the subsequent stage thereof, and recognizes the position where the self-installation device is installed among the display devices installed on the multi-screen. To do.

  The first reception unit 210 includes a first video signal supplied from the video signal generator and a first video signal change size representing a change size for changing the screen size of the first video signal to a size corresponding to multi-screen installation. And divided area allocation information that divides the first video signal changed according to the changed size according to each installation position of each display device installed on the multi-screen and assigns a divided area to each of the display devices, Received from a display device connected in a daisy chain at its front stage.

  When the second receiving unit 220 divides the video including the second video signal, the first video signal, and the second video signal obtained from the video signal generator according to the installation of the multi-screen, Change the division position information representing a region into which the video signal is divided, and the video including the first video signal and the second video signal to a size to be displayed on the entire plurality of display devices installed in the multi-screen, The video after the size change is divided according to each installation position of the plurality of display devices installed on the multi-screen, the divided areas are assigned to each of the display devices, and the assigned video is A display position representing a position on the display screen of the second video signal included in the allocated area, obtained when an area corresponding to the second video signal is included; and the second video signal. Receiving the screen size the second video signal resizing representing a resized to change size corresponding to the multi-screen installation, the daisy-chain connected display device in front of himself.

  The first video control unit 225 changes the size of the first video signal according to the first video signal change size based on each information received by the first reception unit, and among the changed first video signals, An image of an area assigned by the divided area allocation information is obtained and output to the output video control unit 227.

  The second video control unit 226 changes the size of the second video signal according to the changed size, divides the second video signal according to the division position information, and determines a display position to be displayed on the display screen according to the display position information.

  The output video control unit 227 displays the video of the region corresponding to the divided region allocation information in the first video signal changed according to the changed size on the display unit, and the second video signal is assigned to the display device for display. The second video signal is displayed on its own display unit based on the second video signal change size, the division position information, and the display position according to whether or not it has been received.

  The display unit 228 has a function of displaying an image. For example, when the display device 200 is a liquid crystal display device, the display unit 228 is a liquid crystal display panel. When the display device 200 is a projector, the display unit 228 includes a projector light source, a liquid crystal panel, a projection lens, and the like that project an image on a screen, and projects a video signal on the screen.

  Such a display device 200 is daisy chain connected. Further, since the display device 200 is not connected to the downstream of the most downstream display device, that is, the rearmost display device 200 connected in a daisy chain, the display device 200 has a function of communicating with the display device connected to the downstream of itself. Although it may have, it communicates with the display apparatus connected to the front | former stage of self.

  FIG. 4 is a diagram illustrating an installation state of the display device 100 and the display device 200. Here, three display devices 200 are daisy chain connected to one first display device 100. Hereinafter, the display device 200 connected in the daisy chain will be described as a display device 201, a display device 202, and a display device 203 in the order of connection to the display device 100. The display device 100, the display device 201, the display device 202, and the display device 203 are arranged to have a 2 × 2 screen configuration. At this time, in the 2 × 2 screen configuration, the display device 100 is installed in the upper left position, the display device 201 is installed in the upper right position, the display device 202 is installed in the lower left position, and the display device 203 is installed in the lower right position.

  Here, a case will be described as an example where the first video signal is enlarged and displayed on the entire four screens in a 2 × 2 size, and the second video signal is displayed at the center of the entire screen. The first video signal is enlarged to a predetermined size by each display device installed in a multi-screen, and the display region 100a of the display device 100, the display region 201a of the display device 201, the display region 202a of the display device 202, and the display device 203. Are displayed in the display area 203a. Here, in the center of the video of the first video signal, the second video signal is displayed on the display area 100b of the display device 100, the display area 201b of the display device 201, the display area 202b of the display device 202, and the display of the display device 203. It is displayed in the area 203b.

Next, operations of the display device 100 and the display device 200 described above will be described. Here, a case where three display devices 200 are connected to the display device 100 by 2 × 2 (two vertical and two horizontal) multi-screen connections will be described. The display device 100 is a master, and the display device 200 is a slave. Hereinafter, the three display devices 200 will be described as display devices 201, 202, and 203.
FIG. 5 is a flowchart for explaining operations of the display device 100 and the display device 200 (display devices 201, 202, and 203).
First, the first video signal input unit 110 of the display device 100 inputs the first video signal from the video signal generator 20 (step S11). For example, the size of the first video signal is 1024 × 768.
The 1st transmission part 112 outputs the 1st signal video signal input into the 1st video signal input part 110 to the display apparatus 201 connected to the back | latter stage. At this time, the first video signal assigning unit of the display device 100 is assigned to each display device and the number of display devices 201, 202, and 203 connected in the subsequent stage based on the control signal obtained from the multi-connection control unit 101. Identification information (display device ID), installation position and connection status (2 × 2), the first video signal change size (double vertical and double horizontal here), and divided area allocation information (display device 100). In the upper left, the display device 201 in the upper right, the display device 202 in the lower left, and the display device 203 in the lower right). The first transmission unit 112 transmits the first video signal change size and the divided region allocation information to the subsequent display device (step S12). Here, by designating the display device ID, it is possible to identify which display device the divided area allocation information is for.

  The first video signal, the first video signal change size, and the divided area allocation information are supplied from the display device 201 to the display device 202, and are supplied from the display device 203 to the display device 200c, and the respective display devices 201, 202, and 203 are supplied. (Step S21).

  The first video control unit 125 of the display device 100 enlarges the input 1024 × 768 first video signal by 2 × 2 times (vertically doubled, doubled horizontally) according to the first video signal change size. In the first video signal after being changed to a size of 2048 × 1536 and enlarged, an image of the region assigned to itself by the divided region allocation information (the upper left region of 2 × 2) is obtained. Is output to the output video controller 127 (step S13).

  In addition, in each of the display devices 201, 202, and 203 of each slave, the first video control unit 225 sizes the 1024 × 768 first video signal input from the previous display device according to the first video signal change size. Is enlarged by 2 × 2 to a size of 2048 × 1536, and the video of the area assigned to itself by the divided area allocation information in the enlarged first video signal (the display device 201 has Upper right, display device 202 is lower left, display device 203 is lower right), and the image of the obtained area is output to output video control unit 227 (step S22).

Next, the second video signal input unit 120 inputs the second video signal from the video signal generator 30 (step S14). For example, the size of the second video signal is 1024 × 768.
The display device 100 has initial information (position and size on a 2 × 2 screen) of a sub screen (area for displaying a second video signal), and here, a size of 512 × 384 is displayed at the center when displaying multiple images. The setting value to be displayed is input in advance). Further, the display device 100 generates the division position information by the division position information generation unit 121, generates the display position information by the display position information generation unit 122, generates the change size by the change size generation unit 123, and generates the second video. Along with the signal, the second transmission unit 124 transmits the signal to the display device 201 (step S15). Thereby, the position information and size information of the sub screen, the position information and size information of the video to be displayed, and the second video signal are sequentially transmitted to the display devices 201, 202, and 203, and the respective display devices 201, 202, 203 (step S23).

  On the other hand, the second video control unit 126 of the display apparatus 100 displays the input 1024 × 768 second video signal as a sub screen based on the division position information, the display position information, and the change size. Then, the video of the area to be displayed is output to the output video controller 127. The output video control unit 127 displays the video obtained from the first video control unit 125 and the video obtained from the second video control unit 126 on the display unit 128 according to the display size and position (step S16).

  The slave display devices (display devices 201, 202, 203) display the second video signal input from the preceding display device as a sub-screen based on the division position information, the display position information, and the change size. The video of the area to be displayed is output to the output video control unit 227. The output video control unit 227 displays the video obtained from the first video control unit 225 and the video obtained from the second video control unit 226 on the display unit 228 in accordance with the display size and position (step S24).

  Thus, when the video is displayed on the display device 100, the display device 201, the display device 202, and the display device 203, the first video signal is displayed on the entire screen of the four display devices as shown in FIG. The second video signal is displayed at the center.

  For example, as shown in FIG. 4, when a separate screen (second video signal) is to be displayed at the center of a 2 × 2 four-plane multi, the display device 100 (master) displays each slave (display devices 201, 202, 203). ) Sub-screen position and size information is calculated, and data is transmitted to each slave. The first video control unit 125 of the display device 100 generates another screen having a size of horizontal 512 and vertical 384 from the position of X = 512, Y = 384 on the display screen, and sends it to the output video control unit 127. Further, the second video control unit 126 of the display device 201 generates another screen having a size of horizontal 512 and vertical 384 from the position of X = 0, Y = 384 of the display screen, and the output video control unit of the display device 201. 227. The second video control unit 126 of the display device 202 generates another screen having a size of horizontal 512 and vertical 384 from the position of X = 512 and Y = 0 on the display screen, and outputs it to the output video control unit 227 of the display device 202. send. The second video control unit 126 of the display device 202 generates another screen having a size of horizontal 512 and vertical 384 from the position of X = 0, Y = 512 of the display screen, and outputs it to the output video control unit 227 of the display device 202. send. Here, the separate screen represents PIP or PBP when performing multi-screen display.

The output video control unit 227 of the display device 201 synthesizes the main screen (first video signal) and the sub-screen video (second video signal) and sends them to the display unit 228 to display the video. Here, the main screen is a screen that normally displays video on the display device.
The display position and display size of the main screen and the sub screen are calculated by the master display device 100, and data is transmitted to the subsequent display devices 200 (display devices 201, 202, and 203).

Next, calculation of the display position and the display size of the sub screen for displaying the second video signal on each display device 200 performed by the display device 100 will be described.
FIG. 6 is a diagram for explaining the display position and display size of the sub-screen.
As shown in FIG. 6, the sub screen (second video signal, symbol i) is displayed on the main screen (first video signal, symbol a) on the display screen of one display device. Use as reference video. Here, the size of the first video signal displayed on the screen is 1024 × 768, and the size of the second video signal displayed on the screen is 512 × 384. Then, the size of the reference image is expanded by the necessary multi-screen size in calculation, and at the same time, the size of the sub-screen displayed at the center of the main screen is also expanded (symbol b). For example, the image size is enlarged to 2 × 2 times the video size (2048 × 1536).

  Next, the enlarged image (2 × 2) is divided vertically and horizontally in accordance with the normal screen size, and when the sub-screen reaches the boundary of the dividing line (references c and d), It is determined that the image is displayed on the video equipment, that is, assigned to the adjacent vertical or horizontal display device. This determination is repeated until the size of the remaining divided video becomes one screen size or less, and which screen is assigned to which position and the sub screen is assigned by calculation. Then, the position information and size information on the screen of the sub screen obtained by the indexing are transmitted from the display device 100 to the subsequent display devices 201, 202, and 203. Each of the display devices 201, 202, and 203, which are slaves, draws their assigned part on the sub-screen based on the information.

Here, the upper left area (symbol e) of the second video signal in the reference video is assigned to be displayed in the lower right area of the display device 100 (symbol f). Here, the screen size of the display device 100 is 1024 × 768, and the second video allocated within the region of the screen having a size of 512 × 384 from the position of x = 512, y = 384 on the screen. The signal is displayed, and the first video signal is displayed in the remaining area.
Further, for example, the upper right area (symbol g) of the second video in the reference image is assigned to be displayed in the lower left area of the display device 201. Similarly, the lower left area of the second video in the reference image is assigned to be displayed in the upper right area of the display device 202, and the lower right area of the second video in the reference image is the upper left area of the display device 203. Assigned to display in the area.

The main screen (first video signal) can display a video simply enlarged and divided using known logic. More specifically, the following calculation is performed for the sub screen (second video signal).
A case where a first video signal of 1024 × 768 is displayed on a 1024 × 768 display screen, a video that displays a separate screen of 512 × 384 is generated at the center, and this is displayed in a 2 × 2 multi display. , Consider.

Here, since it is 2 × 2, the vertical and horizontal dimensions of the reference image (1024 × 768) are each doubled. In the enlarged reference video, the size of the first video signal is 2048 × 1536, and the size of the second video signal is 1024 × 768.
In the case of 1 × 1 (reference image), the coordinates (i in FIG. 6) of another screen are (x, y) = (256, 192), so this coordinate value is also doubled and (x, y) = (512,384) is obtained by calculating.
Since the drawing range on the screen of the display device 100 is (0,0) − (1023,767), (x, y) = (512,384) obtained by doubling this is It exists in the drawing range. Therefore, an image starting from the upper left coordinate of another screen starts from the screen of the display device 100.

  Next, since the horizontal size of another screen in the enlarged reference image is 1024, when drawing from x = 512 on the screen of the display device 100, it is attempted to draw x = 512 of the enlarged reference image. It protrudes from the screen of the display device 100 to the right side. In this case, an image starting from the coordinate of x = 512 has to be drawn on the screen of the display device 201. Therefore, the drawing start coordinates of the second video signal in the display device 201 are obtained by calculation such that (x, y) = (0, 384), and the horizontal size of the display is 512. Further, the vertical size is 384 in the same manner as the display device 100.

Next, the same calculation is performed for the vertical direction. Since the vertical size of another screen in the enlarged reference image is 768, if drawing is performed up to x = 383 and drawing from x = 384, the display device 100 protrudes from the screen to the lower side. In this case, an image starting from the coordinate of x = 384 has to be drawn on the screen of the display device 202. Therefore, the drawing start coordinates of the second video signal in the display device 202 are obtained by calculation such that (x, y) = (512, 0), and the vertical size of the display is 384 in the vertical direction. Further, the size in the horizontal direction is horizontal 512 as in the display device 100.
Similarly, when the calculation is performed for the display device 203, the drawing start coordinates of the second video signal on the display device 203 are (x, y) = (0, 0), and the vertical size of the display is vertical 384, horizontal direction. The size is horizontal 512.

These calculation results are shown in FIG. FIG. 7 is a diagram for explaining a position and a size at which a video signal is displayed on each display device.
In FIG. 7, PIP Pos X / Y represents the drawing start position of another screen. PIP Width represents the horizontal size of another screen. PIP Height represents the vertical size of another screen. Org X represents the display start position X of the original video for another screen. Org Y represents the display start position Y of the original video for another screen.
The display device 203 moves vertically and horizontally from the position (x, y) = (256, 192) of the first video signal displayed at 512 × 384 from the position (x, y) = (0, 0). What is necessary is just to double and display by the magnitude | size of 512x384.
If the second video signal has a size of 1024 × 768 and is reduced to 512 × 384 for display, Org X / Y may be calculated from the size of the original video signal. In this case, (Org X, Y) of the display device 203 is (512, 384).

  Next, a third embodiment will be described. FIG. 8 is a conceptual diagram for explaining a display system in which a multi-screen is installed in the third embodiment. In this figure, instead of the calculation by the display device 100 (master), a control device 300 (for example, a computer) connected to the outside of the display device 100 is provided, and the control device 300 controls the display device 100 by communication control. The first video signal and the second control signal may be displayed on each display device. In this case, the functions of the first video signal allocation unit 111, the division position information generation unit 121, the display position information generation unit 122, and the changed size generation unit 123 in FIG. Done. The display devices 100, 201, 202, and 203 are daisy chain connected, and the display device 100 obtains the calculation result obtained from the control device 300 and supplies it to the subsequent display devices 201, 202, and 203.

Next, a fourth embodiment will be described. FIG. 9 is a conceptual diagram showing a configuration of a display system in the fourth embodiment. In this embodiment, a case where the number of display devices installed in the third embodiment is 100 will be described.
In this embodiment, the first video signal is enlarged and displayed to the size of the entire 100 display devices, and the second video signal is displayed by a plurality of display devices in a partial area on the lower right side. Here, 57 to 60 (display device corresponding to the code (60) arranged in the horizontal direction from the code (57) in FIG. 9), 67 to 70 (arranged in the horizontal direction from the code (67) in FIG. 9). Display device corresponding to the reference numeral (70)), 77 to 80 (display device corresponding to the reference numeral (80) arranged in the horizontal direction from the reference numeral (77) in FIG. 9), 87 to 90 (in FIG. 9). Display device corresponding to code (90) arranged in order from the code (87) in the horizontal direction), 97 to 100 (display corresponding to code (100) arranged in the horizontal direction from the code (97) in FIG. 9) Display device 200 displays the second video signal output from the video signal generator 30 as a sub-screen by the second video control unit 226. In this case, the display device or the like with reference numerals (78) and (89) displays an image based on the output from the second image control unit 226 on the entire screen.

Next, a fifth embodiment will be described. FIG. 10 is a conceptual diagram illustrating a configuration of a display system according to the fifth embodiment.
In this embodiment, in addition to the first and second video signals in the fourth embodiment, a video signal generator 40 that further supplies a third video signal is provided. For example, the video signals of the video signal generators 20 and 30 are input to 50 of the 100 display devices, and the video signals of the video signal generators 20 and 40 are input to the remaining 50 display devices. Thus, it is possible to display three screens (three video signals).
According to this configuration, it is possible to display (N−1) different screens in a configuration in which N video signals are input on an X-plane multi-screen using X display devices.

  For example, in FIG. 10, the video signal from the video signal generator 20 is displayed on the entire multi-screen (symbol a) composed of 100 display devices, and 40 display devices on the left side of the multi-screen are displayed. The sub screen display function is used to display the video signal from the video signal generator 30 (reference numeral b), and the sub screen display function of 32 display devices arranged on the lower right side of the multi-screen is used. The video signal from the video signal generator 40 is displayed (reference c). Here, some display devices among the display devices that use the sub-screen display function may display video signals input from two video signal generation devices.

A plurality of video signals are not synthesized using an existing synthesizer, the sub screen display function is used, the size and position of the sub screen to be displayed are obtained by calculation, the size of the second video signal, and the second video signal Among them, the display target area was controlled. As a result, two video signals can be displayed on the entire screen on which the multi-screen is installed without using a synthesizer to synthesize one video signal from a plurality of video signals.
The second video signal is displayed by the display function of the sub screen on the display device assigned to display the second video signal. Accordingly, each display device displays the area allocated to itself among the first video signals on the main screen, and displays the video allocated to itself among the second video signals on the sub-screen. Accordingly, since the screen corresponding to the second video signal can be displayed on a part of the screen corresponding to the first video signal as the entire screen installed in the multi-screen, it is necessary to synthesize the video signal. Disappear.

  As described above, according to the first to fifth embodiments described above, in the display system installed in a multi-screen, the control of the main screen and the sub screen of the display device is performed for all the connected display devices. By doing so, a plurality of video signals can be displayed without synthesizing the video signals. In addition, sub-screen display can be controlled by an external control device so that each display device can be freely sized and positioned, and video signals other than the first video signal can be displayed.

  Also, a program for realizing the functions of the control device 10 in FIG. 1, the display device 100 in FIG. 2, and the display device 200 in FIG. 3 is recorded on a computer-readable recording medium, and the program recorded on this recording medium Display control may be performed by causing the computer system to read and execute the program. Here, the “computer system” includes an OS and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

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

DESCRIPTION OF SYMBOLS 10 Control apparatus 20, 30, 40 Video signal generator 11, 112 1st transmission part 12, 121 Division position information generation part 13, 122 Display position information generation part 14, 124 2nd transmission part 100, 200, 201, 202, DESCRIPTION OF SYMBOLS 203 Display apparatus 101 Multi connection control part 110 1st video signal input part 111 1st video signal allocation part 120 2nd video signal input part 123 Change size production | generation part 125,225 1st video control part 126,226 2nd video control part 127, 227 Output video control unit 128, 228 Display unit 210 First receiving unit 220 Second receiving unit

Claims (9)

A main video signal obtained from a video signal generator, a main video signal change size representing a change size for changing the screen size of the main video signal to a size corresponding to multi-screen installation, and a main video changed according to the change size Dividing the signal according to each installation position of each display device installed in the multi-screen and assigning the divided region to each of the display devices, and the display device connected in a daisy chain to the subsequent stage A first transmitter for transmitting;
A division position representing a region into which the sub video signal is divided when a video including the main video signal and one or more sub video signals obtained from the video signal generator is divided according to the multi-screen installation. A division position information generation unit for obtaining information;
A display position generation unit for obtaining a display position indicating a position on the display screen of the sub video signal when displaying the video including the main video signal and the sub video signal on the entire plurality of display devices installed on the multi-screen; ,
The sub video signal, a sub video signal change size representing a change size for changing the screen size of the sub video signal to a size corresponding to the multi-screen installation, the division position information, and the display position, A second transmitter for transmitting to a display device connected to
A display control device. The display position generation unit
The video including the main video signal and the sub video signal is changed to a size to be displayed on the entire plurality of display devices installed on the multi-screen, and the video after the size is changed is installed on the multi-screen. Dividing according to each installation position of a plurality of display devices, and assigning the divided areas to each of the display devices, and if the assigned video includes an area corresponding to the sub video signal, the assignment The display control apparatus according to claim 1, wherein a display position representing a position on the display screen of the sub video signal included in the specified area is obtained. A display control device according to claim 1 or 2,
The video of the area corresponding to the divided area allocation information among the main video signals changed according to the changed size is displayed on the display unit, and depending on whether or not the display of the main video signal is assigned to its own display device A display device comprising: an output video control unit that displays the sub video signal on its display unit based on the sub video signal change size, the division position information, and the display position. A main video signal supplied from a video signal generator, a main video signal change size representing a change size for changing the screen size of the main video signal to a size corresponding to multi-screen installation, and a main video signal changed according to the change size Display control in which video signal is divided according to each installation position of each display device installed in the multi-screen and divided region allocation information for assigning a divided region to each of the display devices, and daisy chain connected to the preceding stage of itself A first receiver for receiving from the device;
When the video including one or a plurality of sub video signals, the main video signal and the sub video signal obtained from the video signal generator is divided according to the multi-screen installation, the sub video signal is divided. Display indicating the position of the sub video signal on the display screen when displaying the division position information indicating the area and the video including the main video signal and the sub video signal on the plurality of display devices installed on the multi-screen. A position and a sub-video signal change size representing a change size for changing the screen size of the sub-video signal to a size corresponding to the multi-screen installation are received from a display control device connected in a daisy chain in front of itself. Two receivers;
The video of the area corresponding to the divided area allocation information in the main video signal changed according to the changed size is displayed on the display unit, and depending on whether the display of the sub video signal is assigned to its own display device An output video control unit that displays the sub video signal on its display unit based on the sub video signal change size, the division position information, and the display position;
A display device comprising:   5. The display device according to claim 3, wherein the output video control unit displays the sub video signal on a sub-screen of the display unit. A multi-monitor system composed of a plurality of display devices connected in series,
A display device that is a master among the plurality of display devices,
A main video signal obtained from a video signal generator, a main video signal change size representing a change size for changing the screen size of the main video signal to a size corresponding to multi-screen installation, and a main video changed according to the change size Dividing the signal according to each installation position of each display device installed in the multi-screen and assigning the divided region to each of the display devices, and the display device connected in a daisy chain to the subsequent stage A first transmitter for transmitting;
A division position representing a region into which the sub video signal is divided when a video including the main video signal and one or more sub video signals obtained from the video signal generator is divided according to the multi-screen installation. A division position information generation unit for obtaining information;
A display position generation unit for obtaining a display position indicating a position on the display screen of the sub video signal when displaying the video including the main video signal and the sub video signal on the entire plurality of display devices installed on the multi-screen; ,
The sub video signal, a sub video signal change size representing a change size for changing the screen size of the sub video signal to a size corresponding to the multi-screen installation, the division position information, and the display position, A second transmitter for transmitting to a display device connected to
The video of the area corresponding to the divided area allocation information in the main video signal changed according to the changed size is displayed on the display unit, and depending on whether the display of the sub video signal is assigned to its own display device An output video control unit that displays the sub video signal on its display unit based on the sub video signal change size, the division position information, and the display position,
A display device that is a slave among the plurality of display devices,
A first receiving unit that receives the main video signal, the main video signal change size, and the divided region allocation information from a display device connected to a preceding stage of the main video signal;
A second receiving unit that receives the sub-video signal, the division position information, the display position, and the sub-video signal change size from a display device that is daisy chain-connected to the front stage of the second sub-video signal;
Whether or not the video of the area corresponding to the divided area allocation information among the main video signal changed according to the changed size is displayed on the display unit provided therein, and whether or not the display is assigned to the display device of the sub video signal In accordance with the output video control unit for displaying the sub video signal on the display unit included in the sub video signal based on the sub video signal change size, the division position information, and the display position;
A multi-monitor system comprising: A main video signal obtained from a video signal generator, a main video signal change size representing a change size for changing the screen size of the main video signal to a size corresponding to multi-screen installation, and a main video changed according to the change size Dividing the signal according to each installation position of each display device installed in the multi-screen and assigning the divided region to each of the display devices, and the display device connected in a daisy chain to the subsequent stage Send
A division position representing a region into which the sub video signal is divided when a video including the main video signal and one or more sub video signals obtained from the video signal generator is divided according to the multi-screen installation. Get information,
Obtaining a display position representing a position on the display screen of the sub video signal when displaying the video including the main video signal and the sub video signal on the entire plurality of display devices installed on the multi-screen,
The sub video signal, a sub video signal change size representing a change size for changing the screen size of the sub video signal to a size corresponding to the multi-screen installation, the division position information, and the display position, A display control method for a display device installed in a multi-screen, wherein the display device is transmitted to a display device connected to the display. A main video signal obtained from a video signal generator, a main video signal change size representing a change size for changing the screen size of the main video signal to a size corresponding to multi-screen installation, and a main video changed according to the change size Dividing the signal according to each installation position of each display device installed in the multi-screen and assigning the divided region to each of the display devices, and the display device connected in a daisy chain to the subsequent stage Send
A division position representing a region into which the sub video signal is divided when a video including the main video signal and one or more sub video signals obtained from the video signal generator is divided according to the multi-screen installation. Get information,
Obtaining a display position representing a position on the display screen of the sub video signal when displaying the video including the main video signal and the sub video signal on the entire plurality of display devices installed on the multi-screen,
The sub video signal, a sub video signal change size representing a change size for changing the screen size of the sub video signal to a size corresponding to the multi-screen installation, the division position information, and the display position, To the display device connected to the
The video of the area corresponding to the divided area allocation information in the main video signal changed according to the changed size is displayed on the display unit, and depending on whether the display of the sub video signal is assigned to its own display device The display method of a display device, wherein the sub video signal is displayed on its own display unit based on the sub video signal change size, the division position information, and the display position. A main video signal supplied from a video signal generator, a main video signal change size representing a change size for changing the screen size of the main video signal to a size corresponding to multi-screen installation, and a main video signal changed according to the change size Display control in which video signal is divided according to each installation position of each display device installed in the multi-screen and divided region allocation information for assigning a divided region to each of the display devices, and daisy chain connected to the preceding stage of itself Received from the device,
When the video including one or a plurality of sub video signals, the main video signal and the sub video signal obtained from the video signal generator is divided according to the multi-screen installation, the sub video signal is divided. Display indicating the position of the sub video signal on the display screen when displaying the division position information indicating the area and the video including the main video signal and the sub video signal on the plurality of display devices installed on the multi-screen. Receiving a position and a sub-video signal change size representing a change size for changing the screen size of the sub-video signal to a size corresponding to the multi-screen installation from a display control device connected in a daisy chain to its previous stage;
The video of the area corresponding to the divided area allocation information in the main video signal changed according to the changed size is displayed on the display unit, and depending on whether the display of the sub video signal is assigned to its own display device The display method of a display device, wherein the sub video signal is displayed on its own display unit based on the sub video signal change size, the division position information, and the display position.

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