JP2011022862A - Display control unit, display control system, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display control unit, a display control system, and a computer program, displaying images corresponding to a display direction on an image display device when the display direction of the image display device is changed. <P>SOLUTION: The image display device 2 advises the display control unit 1 of a rotational angle detected by a rotational angle sensor 24 when the display direction of an image display section 22 is changed. The display control unit 1 specifies image information to be transmitted to the respective image display devices 2, based on the image display device 2 of a transmission source that has advised the rotational angle, the advised rotational angle, and a currently set display mode when the rotational angle has been advised from the image display device 2. The display control unit 1 transmits the identified image information to the image display device 2, and the image display device 2 displays images on the image display section 22, based on the acquired image information. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display control device, a display control system, and a computer program that can be connected to one or a plurality of image display devices and transmit image information to the connected image display devices.

  Regarding image display control for a conventional image display device, for example, as in a car navigation system, a character string displayed on a display panel is always rotated and displayed in a direction that is easy to see for a viewer such as a driver or a passenger. There is a device. For example, a car navigation system is provided with a heading-up mode for displaying a map with the traveling direction always upward. In the map display in the heading-up mode, each time the vehicle makes a left turn or a right turn in the traveling direction, the map displayed on the display panel is displayed by being rotated left or right. Accordingly, in the map display in the heading-up mode, the situation of the actual view from the vehicle matches the situation on the map, so it is easy to grasp the surrounding situation.

  By the way, in the car navigation system, road names, railway route names, river names, etc. in the map are respectively displayed along the roads, routes, and rivers. Are often displayed orthogonal to the. Therefore, in the heading-up mode in which the character string to be displayed on the display panel is rotated left or right when the vehicle is turned left or right, a character string in which the vertical direction of the character matches the vertical direction of the display panel is viewed. However, there is a problem that it is difficult to recognize a character string in which the vertical direction of the character does not match the vertical direction of the display panel.

  In order to solve such a problem, a sensor for detecting the position of the viewer is provided in the vehicle, and the character string displayed on the display panel is rotated according to the position of the viewer detected by the sensor. A technique for displaying is proposed (see Patent Document 1). Thus, by rotating the character string in accordance with the position of the viewer, for example, whether the viewer is a driver of the vehicle or a passenger in the passenger seat, A screen that is easy for the user to see can be displayed.

  In addition, two human sensors are provided on both the left and right sides of the display screen, and the display screen is always turned to the front of the person (viewer) by rotating the display screen so that the two human sensors detect both people. A display device has been proposed (see Patent Document 2). By using such a display device, the viewer can always be positioned in front of the display screen.

JP 2005-84122 A JP 10-1117312 A

  By the way, when using a display device with multiple participants facing each other at a meeting, meeting or meeting, etc., the situation where each participant can view the displayed information by rotating the display screen of the display device There can be. In such a situation, it is also possible to browse different information for each participant. However, Patent Documents 1 and 2 are intended to provide a screen display that is easy to view for a certain viewer, and are not intended to browse different information for each of a plurality of viewers. Therefore, there is a problem that information corresponding to a viewer cannot be displayed when the display screen is directed to a specific viewer while there are a plurality of viewers such as in a conference.

  The present invention has been made in view of such circumstances, and an object of the present invention is to display an image according to the display direction on the image display device when the display direction of the image display device is changed. Another object of the present invention is to provide a display control device, a display control system, and a computer program that can appropriately provide useful information to a person.

  The display control device according to the present invention can be connected to one or a plurality of image display devices, and is a display control device that transmits and displays image information to be displayed on each of the connected image display devices. A direction acquisition unit that acquires information indicating each display direction of the image display device, and an image specification unit that specifies image information to be displayed on the image display device based on the information acquired by the direction acquisition unit; And a transmission unit that transmits the image information specified by the image specifying unit to the image display device.

  The display control device according to the present invention includes a viewer detection unit that detects a viewer located in the display direction of the image display device indicated by the information acquired by the direction acquisition unit, and the image specifying unit includes the viewer The image information corresponding to the viewer detected by the detection unit is specified.

  The display control apparatus according to the present invention includes an image storage unit that stores image information in association with each of one or a plurality of viewers, and the image specifying unit corresponds to a viewer detected by the viewer detection unit. The image information to be specified is specified from the image information stored in the image storage unit.

  The display control device according to the present invention includes a position information table that stores each of the display directions of the image display device in association with viewer information indicating a viewer located in each display direction, and detects the viewer The unit is characterized in that a viewer corresponding to the display direction of the image display device indicated by the information acquired by the direction acquisition unit is specified from the position information table.

  The display control device according to the present invention includes a device detection unit that detects another image display device positioned in the display direction of the image display device indicated by the information acquired by the direction acquisition unit, and the viewer detection unit includes: A viewer associated in advance with the image display device detected by the device detection unit is detected.

  The display control device according to the present invention includes a viewer table that stores, in association with each other, viewer information for identifying a plurality of viewers, and a confidential level preset for each of the viewers, and the viewer detection A security level acquisition unit that acquires the security level of the viewer detected by the unit from the viewer table, and the image specifying unit specifies image information corresponding to the security level acquired by the security level acquisition unit. It is characterized by being.

  In the display control device according to the present invention, the transmission unit transmits the image information specified by the image specifying unit to an image display device whose display direction is indicated by the information acquired by the direction acquisition unit. It is characterized by.

  In the display control device according to the present invention, the transmission unit transmits the image information specified by the image specifying unit to an image display device positioned in a display direction indicated by the information acquired by the direction acquisition unit. It is characterized by that.

  In the display control device according to the present invention, the transmission unit transmits image information specified by the image specifying unit and image information based on a display direction of an image display device located in the display direction. It is characterized by.

  In the display control device according to the present invention, the transmission unit does not transmit image information to an image display device other than the image display device located in the display direction indicated by the information acquired by the direction acquisition unit. It is characterized by that.

  The display control system according to the present invention includes one or a plurality of image display devices and any one of the display control devices described above, and the image display device includes a display unit that displays an image and a display direction of the display unit. A detection unit that detects the display direction, and an output unit that outputs information indicating a display direction detected by the detection unit to the display control device, wherein the direction acquisition unit of the display control device is configured to output the output of the image display device. The information output by the section is obtained.

  The display control system according to the present invention is characterized in that the detection unit detects a rotation angle of the display unit with a vertical direction as a rotation axis as a display direction of the display unit.

  A computer program according to the present invention is a computer program for causing a computer to transmit and display image information to be displayed on each of one or a plurality of image display devices. A direction acquisition step for acquiring information indicating a display direction, an image specification step for specifying image information to be displayed on the image display device based on the information acquired in the direction acquisition step, and an image specification step And a transmission step of transmitting image information to the image display device.

  According to the present invention, image information displayed on each image display device is changed according to the display direction of one or a plurality of image display devices. For example, when the display direction of one image display device is changed, an image displayed on the image display device whose display direction has been changed can be switched to an image corresponding to the changed display direction. Further, when the display direction of one image display device is changed, the image displayed on the image display device other than the image display device whose display direction has been changed is switched to an image corresponding to the changed display direction. Is possible.

  According to the present invention, the image information corresponding to the viewer located in each display direction is displayed on each image display device. Therefore, for example, if the position of the viewer is determined in advance, such as a seat at a conference, the viewer located in the display direction of the image display device can be specified, and thus image information corresponding to the specified viewer is displayed. It becomes possible to make it.

  According to the present invention, image information is stored in association with each viewer, and image information corresponding to a viewer located in the display direction of the image display device is specified from the stored image information. indicate. Therefore, by preparing image information corresponding to each viewer in advance, it is possible to display an image corresponding to each viewer.

  According to the present invention, the display direction of the image display device and the viewer located in each display direction are stored in the table in association with each other, and the viewer located in the display direction of the image display device is stored in the stored contents of the table. Identify from. Therefore, it is possible to easily specify a viewer who is positioned in the display direction of the image display device by the search process for the table.

  According to the present invention, another image display device positioned in the display direction of the image display device is detected, and a viewer associated in advance with the detected other image display device is set as a viewer positioned in the display direction. Detect as. Therefore, in a situation where each viewer is using the image display device, it is possible to specify a viewer who uses the specified image display device by specifying each image display device.

  According to the present invention, a security level is set in advance for each viewer, and an image to be displayed can be changed according to the security level of the viewer positioned in the display direction of the image display device. Therefore, it is possible to change the security level of the information provided to each viewer according to the confidential level.

  According to the present invention, image information corresponding to the changed display direction is transmitted to the image display device whose display direction has been changed. Therefore, by changing the display direction of the image display device, it is possible to appropriately switch the image displayed on the image display device whose display direction has been changed.

  According to the present invention, when the display direction of the image display device is changed, image information corresponding to the changed display direction is transmitted to another image display device positioned in the changed display direction. Therefore, by changing the display direction of the image display device, it is possible to appropriately switch the image displayed on another image display device positioned in the changed display direction.

  According to the present invention, when the display direction of the image display device is changed, the image information corresponding to the changed display direction is compared with the other image display devices positioned in the changed display direction, and the other The image information corresponding to the display direction of the image display device is transmitted. Therefore, in another image display device positioned in the changed display direction, it is possible to display both the image that was originally displayed and the image that should be displayed when the display direction of the image display device is changed. .

  According to the present invention, when the display direction of the image display device is changed, the transmission of the image information to the image display devices other than the other image display devices located in the changed display direction is ended. Therefore, it is possible to prevent inadvertent provision of images desired to be provided only to a specific viewer to other viewers.

  In the present invention, for example, when there are a plurality of viewers around the image display device such as a meeting, the display screen of the image display device is displayed in the direction of a specific viewer. An image corresponding to the changed display direction is displayed on the image display device whose direction has been changed. Therefore, for example, the operator of the image display device can provide useful information to the viewer who exists in the display direction by changing the display direction of the image display device. In addition, when the display screen of the image display device is directed toward a specific viewer, an image corresponding to the changed display direction is displayed on an image display device other than the image display device whose display direction has been changed. The Therefore, for example, the operator of the image display device can appropriately switch the image displayed on each image display device by changing the display direction of the image display device.

1 is a schematic diagram illustrating a configuration example of a display control system according to a first embodiment. 1 is a block diagram illustrating a configuration example of a display control system according to a first embodiment. It is a schematic diagram which shows the memory content of a display image table. It is a schematic diagram for demonstrating the image information displayed on an image display apparatus. It is a schematic diagram for demonstrating the image information displayed on an image display apparatus. It is a schematic diagram for demonstrating the image information displayed on an image display apparatus. It is a flowchart which shows the procedure of the process which a display control apparatus transmits image information to an image display apparatus. FIG. 10 is a schematic diagram illustrating storage contents of a display image table according to the second embodiment. It is a flowchart which shows the procedure of the process which a display control apparatus transmits image information to an image display apparatus. It is a flowchart which shows the procedure of the process which a display control apparatus transmits image information to an image display apparatus. It is a schematic diagram which shows the memory content of a display condition table. It is a flowchart which shows the procedure of the process which a display control apparatus transmits image information to an image display apparatus. It is a flowchart which shows the procedure of the process which a display control apparatus transmits image information to an image display apparatus. It is a schematic diagram which shows the memory content of the table stored in the memory | storage part of the display control apparatus of Embodiment 4. It is a schematic diagram for demonstrating the image information displayed on an image display apparatus. It is a flowchart which shows the procedure of the process which a display control apparatus transmits image information to an image display apparatus.

  Hereinafter, a display control device, a display control system, and a computer program according to the present invention will be described in detail with reference to the drawings showing embodiments thereof.

(Embodiment 1)
The display control system according to Embodiment 1 will be described below. FIG. 1 is a schematic diagram illustrating a configuration example of a display control system according to the first embodiment. The display control system 100 according to the first embodiment includes a plurality of image display devices 2 and 2 and a display control device 1 that transmits and displays image information on each of the image display devices 2 and 2. The display control device 1 and the image display devices 2 and 2 include, for example, video cables 100a and 100a that comply with standards such as VGA (Video Graphics Array) and DVI (Digital Visual Interface), USB (Universal Serial Bus), and UART. It is connected via general-purpose cables 100b and 100b in accordance with a standard such as (Universal Asynchronous Receiver Transmitter).

  The image display devices 2 and 2 acquire image information transmitted from the display control device 1 via the video cables 100a and 100a, and cause the image display units 22 and 22 to display images based on the acquired image information. The image display devices 2 and 2 exchange data with the display control device 1 via the general-purpose cables 100b and 100b.

  The image display devices 2 and 2 include support members 2a and 2a that support the image display units 22 and 22. The image display units 22 and 22 are in the direction of the arrows in FIG. 1 with respect to the support members 2a and 2a. It is configured to be able to rotate in the direction indicated by the symbol. The image display units 22 and 22 may be fixed to the support members 2a and 2a and configured to be rotatable together with the support members 2a and 2a.

  Further, the image display devices 2 and 2 make the state of the image display device 2 shown in the upper side in FIG. 1 a state in which the image display unit 22 faces the front, and the state of the image display unit 22 is based on this state. A rotation angle sensor 24 (see FIG. 2) that detects a rotation angle (0 ° to 360 °) is provided. Then, the image display devices 2 and 2 transmit the rotation angle detected by the rotation angle sensor 24 to the display control device 1 via the general-purpose cable 100b. The display control device 1 according to the first embodiment controls image information to be displayed on the image display devices 2 and 2 in accordance with the rotation angle sent from the image display devices 2 and 2.

  FIG. 2 is a block diagram illustrating a configuration example of the display control system according to the first embodiment. The image display device 2 according to the first embodiment includes a control unit 20, a storage unit 21, an image display unit 22, a rotation drive unit 23, a rotation angle sensor 24, an operation unit 25, a communication interface 26, and the like. The hardware units described above are connected to each other via a bus.

  The control unit 20 is a central processing unit (CPU), a micro processor unit (MPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), a microcomputer, or the like. The control unit 20 controls each part of the hardware as described above and appropriately executes a control program stored in the storage unit 21.

  Specifically, the control unit 20 transmits the image information from the display control apparatus 1 acquired by the video interface 26 a to the image display unit 22, and the rotation angle of the image display unit 22 detected by the rotation angle sensor 24. Perform reading processing. In addition, the control unit 20 performs processing for reading / writing data from / to the storage unit 21, processing for acquiring various data transmitted from the general-purpose interface 26b to the display control device 1 from each unit, and transmitting the data to the general-purpose interface 26b, and the like.

  The storage unit 21 is an EEPROM (Electrically Erasable and Programmable ROM), a flash ROM, an HDD (Hard Disk Drive), or the like. The storage unit 21 stores various control programs necessary for operating the image display device 2, various data generated when the control unit 20 executes the control program, and the like. In addition, the storage unit 21 stores unique identification information for identifying the image display device 2 itself. As the identification information, for example, an identification number assigned to the image display device 2, an identification number such as a product number, unique information preset by the user of the image display device 2, or the like can be used.

  The image display unit 22 is a display device such as an LCD (Liquid Crystal Display), a CRT (Cathode Ray Tube), or a PDP (Plasma Display Panel). The image display unit 22 acquires the image information acquired by the video interface 26a from the display control device 1, and displays an image based on the acquired image information.

  The rotation drive unit 23 rotates the image display unit 22 in the direction indicated by the arrow in FIG. 1 with respect to the support member 2a. In the first embodiment, it is assumed that the user (viewer) of the image display device 2 manually rotates the image display unit 22, and the rotation drive unit 23 is used by the image display unit 22 by such a user. It assists the rotation. However, for example, when the image display device 2 is configured to be remotely operable, the rotation drive unit 23 automatically rotates the image display unit 22 in accordance with a rotation instruction of the image display unit 22 that is remotely performed by the user. You may do it.

  The rotation angle sensor (detection unit) 24 sets the state in which the image display unit 22 faces the front of the image display device 2 to 0 °, and detects the rotation angle of the image display unit 22 from this state. The rotation angle sensor 24 notifies the control unit 20 of the detected rotation angle.

  The operation unit 25 includes operation buttons necessary for the user to operate the image display device 2, such as a power button and a key for adjusting image quality. When each operation button is operated by the user, the operation unit 25 sends a control signal corresponding to the operated operation button to the control unit 20, and the control unit 20 performs processing corresponding to the control signal acquired from the operation unit 25. Execute. If the image display device 2 is configured to perform only the operation of displaying the image information transmitted from the display control device 1 on the image display unit 22, a complicated operation mechanism is not necessary. On the other hand, if the image display device 2 is configured to perform a complicated operation, a mechanism that can use a user interface provided in the image display device 2 such as a mouse, a keyboard, and a tablet may be provided.

  The communication interface (output unit) 26 includes a video interface 26a and a general-purpose interface 26b. The video interface 26a is an interface for connecting to the video cable 100a, and acquires image information from the display control device 1 via the video cable 100a. The general-purpose interface 26b is an interface for connecting to the general-purpose cable 100b, and exchanges data with the display control device 1 via the general-purpose cable 100b. For example, the general-purpose interface 26 b sends the identification information of the image display device 2 stored in the storage unit 21, the rotation angle of the image display unit 22 detected by the rotation angle sensor 24, and the like to the display control device 1.

On the other hand, the display control device 1 includes a control unit 10, a storage unit 11, a communication interface 12, and the like. The hardware units described above are connected to each other via a bus.
The control unit 10 is a CPU, MPU, ASIC, FPGA, microcomputer or the like, and controls each hardware unit as described above, and appropriately executes a control program stored in the storage unit 11.

  Specifically, the control unit 10 determines the identification information and the rotation angle transmitted from the image display devices 2 and 2 by the general-purpose interface 12b, and the image information to be transmitted to each of the image display devices 2 and 2. A process for transmitting the determined image information from the video interface 12a to each of the image display apparatuses 2 and 2 and the like.

  The storage unit 11 is an EEPROM, a flash ROM, an HDD, or the like. The storage unit 11 stores various control programs necessary for operating the display control device 1 of the first embodiment as the display control device of the present invention, various data generated when the control unit 10 executes the control program, and the like. Remember. The storage unit 11 also stores a plurality of pieces of image information to be transmitted to the image display devices 2 and 2, a display image table 11 a as shown in FIG. 3, display device information 11 b that is information about the image display devices 2 and 2, and the like. Remember.

  The communication interface 12 includes a video interface 12a and a general-purpose interface 12b. The video interface 12a is an interface for connecting to the video cable 100a, and transmits image information to the image display device 2 via the video cable 100a. The general-purpose interface 12b is an interface for connecting to the general-purpose cable 100b, and exchanges data with the image display device 2 via the general-purpose cable 100b.

  In addition to the configuration described above, the display control device 1 may further include an operation unit for operating the display control device 1 and a display unit for displaying the processing results of the display control device 1. In this case, the user of the display control device 1 can easily change the image information stored in the storage unit 11, the stored content of the display image table 11a, the stored content of the display device information 11b, and the like using the operation unit and the display unit. it can.

  FIG. 3 is a schematic diagram showing the stored contents of the display image table 11a. The display image table 11a stores the rotation angle of the image display devices 2 and 2, the identification information of the transmission destination device, display image information, and the like in association with the identification information of the image display devices 2 and 2. FIG. 3 shows the display image table 11a for the image display device 2 whose identification information is “display device α”. However, the storage unit 11 stores not only the display image table 11 a but also display image tables for all the image display devices 2 and 2 that constitute the display control system 100.

  The identification information in the display image table 11a is information for identifying the image display devices 2 and 2, for example, identification information stored in the storage unit 21 of the image display devices 2 and 2. The identification information may be information arbitrarily set by the user of the display control device 1 to identify the image display devices 2 and 2.

  The rotation angle is the rotation angle of the image display unit 22 of the image display devices 2 and 2. In the first embodiment, the orientation (display direction) of the image display unit 22 when the image display apparatuses 2 and 2 are activated and turned on is set as a reference direction, and the rotation angle at this time is 0 °. To do. However, for example, the orientation of the image display unit 22 of the image display devices 2 and 2 with reference to a predetermined direction may be the rotation angle of the image display devices 2 and 2. Further, although 0 °, 135 °, 180 °, and 225 ° are set as the rotation angle, the rotation angle may be set to an appropriate angle according to the use form of the display control system 100.

  The identification information and display image information of the transmission destination device are image information to be transmitted to the respective image display devices 2 and 2 when the image display device 2 identified by the corresponding identification information rotates to the corresponding rotation angle. Indicates. The identification information of the transmission destination device is also information for identifying the image display devices 2 and 2, for example, the identification information stored in the storage unit 21 of the image display devices 2 and 2.

  In the display control apparatus 1 of the first embodiment, three display modes can be set: a default mode, a dual display mode, and a confidential display mode. Therefore, image information to be transmitted to the respective image display devices 2 and 2 is registered in the display image table 11a for each display mode. The display modes are not limited to these three modes, and the number and type according to the usage mode of the display control system 100 may be set. The display image information need not be the image information itself, and may be information that can specify the image information stored in the storage unit 11 or may be information that specifies the storage area of the storage unit 11. The display image table 11 a is created by the user of the display control device 1 and registered or updated by the control unit 10 when the display control device 1 controls the image information displayed on the image display devices 2 and 2.

  Although not shown, identification information, assigned address information, and the like are stored in the display device information 11b for each of the image display devices 2 and 2. In addition, the display device information 11b may store identification information of a user (browser) to which the image display devices 2 and 2 are assigned. The storage content of the display device information 11 b is input by the user of the display control device 1 and registered or updated by the control unit 10 when the display control device 1 starts to control the new image display device 2.

  Hereinafter, when the display control system 100 having the above-described configuration is applied to a conference system used for a conference held by one presenter and a plurality of participants (viewers), the display control device 1 and the image Processing performed by the display devices 2 and 2 will be described. The presenter or the conference organizer registers the display image table 11a and the display device information 11b in the storage unit 11 of the display control device 1 before the start of the conference, and sets each of the image display devices 2 and 2 to predetermined positions. Install it. Also, the presenter or the conference organizer turns on and activates the display control device 1 and the image display devices 2 and 2 when the conference starts.

  The control units 20 of the image display devices 2 and 2 that have completed the start-up process notify the display control device 1 of the rotation angle detected by the rotation angle sensor 24 together with the identification information stored in the storage unit 21. In the first embodiment, the rotation angle of the image display devices 2 and 2 is based on the orientation of the image display unit 22 at the time of activation, and the rotation angle at this time is 0 °. The rotation angles notified from the display devices 2 and 2 to the display control device 1 are all 0 °. Further, when the control unit 20 notifies the rotation angle detected by the rotation angle sensor 24, it is not necessary to notify the display control device 1 of the rotation angle as long as it is information indicating the rotation angle.

  The control unit 10 of the display control device 1 that has completed the activation process selects image information to be transmitted to each of the image display devices 2 and 2 based on the rotation angle acquired from each of the image display devices 2 and 2. Specifically, the control unit 10 reads the display image table 11 a corresponding to the image display device 2 from the storage unit 11 based on the identification information acquired from any one of the image display devices 2. Further, the control unit 10 determines which of the default mode, the dual display mode, and the confidential display mode is set. And the control part 10 is based on the rotation angle acquired from the read display image table 11a, and the mode currently set, and the identification information of the image display apparatuses 2 and 2 of a transmission destination, and the image display apparatus 2 , 2 are read out from the display image information to be transmitted.

  Then, the control unit 10 of the display control device 1 transmits the display image information read from the display image table 11a to the image display devices 2 and 2 indicated by the identification information of the transmission destination device read from the display image table 11a. The control unit 10 reads the address information of the transmission destination image display device 2 from the display device information 11b based on the identification information of the transmission destination device read from the display image table 11a, and uses this address information to read the image information. May be transmitted. In addition, immediately after the image display devices 2 and 2 are activated, the display control device 1 does not select image information based on the rotation angle (display direction) of the image display devices 2 and 2, but is registered in advance. Information may be transmitted to each of the image display apparatuses 2 and 2.

  As described above, the image information transmitted by the display control device 1 is acquired by each of the image display devices 2 and 2 and displayed on the image display unit 22, thereby being registered in advance for each of the image display devices 2 and 2. The displayed image can be displayed. The control unit 20 of the image display devices 2 and 2 acquires the image information transmitted from the display control device 1 and causes the image display unit 22 to display the image information, and also based on the rotation angle detected by the rotation angle sensor 24. It is determined whether or not the display direction of the display unit 22 has been changed. When the control unit 20 detects that the display direction of the image display unit 22 has been changed, the control unit 20 notifies the display control device 1 of the rotation angle detected by the rotation angle sensor 24 together with the identification information stored in the storage unit 21. To do.

  The control unit (direction acquisition unit) 10 of the display control device 1 that has started transmitting image information to the image display devices 2 and 2 changes the rotation angle from the image display device 2 in which the display direction of the image display unit 22 has been changed. get. And the control part 10 selects the image information which should be transmitted to each of the image display apparatuses 2 and 2 based on the acquired rotation angle. Specifically, the control unit 10 reads the display image table 11 a corresponding to the image display device 2 from the storage unit 11 based on the identification information acquired from any one of the image display devices 2. Further, the control unit 10 determines which of the default mode, the dual display mode, and the confidential display mode is set. Then, the control unit (image specifying unit) 10 reads the identification information of the transmission destination image display devices 2 and 2 based on the acquired rotation angle and the currently set mode from the read display image table 11a. Then, display image information to be transmitted to each of the image display devices 2 and 2 is read out.

  Then, the control unit (transmission unit) 10 of the display control device 1 transfers the display image information read from the display image table 11a to the image display devices 2 and 2 indicated by the identification information of the transmission destination device read from the display image table 11a. To transmit. The image display devices 2 and 2 cause the image display unit 22 to display the image information transmitted by the display control device 1. Thereby, when the display direction of any one of the image display devices 2 is changed, an image registered in advance according to the changed display direction can be displayed on each of the image display devices 2 and 2.

  4 to 6 are schematic diagrams for explaining image information displayed on the image display devices 2 and 2. 4 shows an example when the default mode is set, FIG. 5 shows an example when the dual display mode is set, and FIG. 6 shows an example when the confidential display mode is set. Show. Each of FIGS. 4A to 6D uses four image display devices 2 and 2 whose identification information are display devices α, β, γ, and δ in a state where four viewers face each other. The figure which looked at the situation from right above is shown. In the initial state, as shown in FIGS. 4A, 5A, and 6A, the display direction of the image display device 2 of the display device α is the right direction, and the image of the display device β is displayed. The display direction of the display device 2 is upward, the display direction of the image display device 2 of the display device γ is leftward, and the display direction of the image display device 2 of the display device δ is downward. In the following, the image display devices 2 and 2 whose identification information is the display devices α, β, γ, and δ will be referred to as image display devices α, β, γ, and δ, respectively.

  4 to 6, it is assumed that the presenter of the conference uses the image display device α, and three participants use any of the image display devices β, γ, and δ. 4 to 6 show image information displayed on each of the image display devices α, β, γ, and δ when the display direction of the image display device α used by the presenter is changed. 4A to 6D, the display image information of the image display device α is displayed on the upper right, the display image information of the image display device β is displayed on the upper left, and the display of the image display device γ is displayed on the lower left. Image information is shown in the lower right, and display image information of the image display device δ is shown in the lower right.

  First, the case where the default mode is set will be described. FIG. 4A shows a state in which different images are displayed on the four image display devices α, β, γ, and δ, respectively. As shown in the display image table 11a of FIG. 3, in the image display device α, the display image information in the default mode when the rotation angle is 0 ° is image1. Therefore, as shown in FIG. 4A, in the initial state, the image 1 is displayed on the image display device α. For the other image display devices β, γ, and δ, the display image table 11a is not shown, but the images image2, image3, and image4 are displayed by the same processing.

  When the display direction of the image display device α is changed from the state shown in FIG. 4A toward the image display device β as shown in FIG. 4B, the control unit 20 of the image display device α. Detects a rotation angle of 135 ° by the rotation angle sensor 24. The control unit 20 notifies the detected 135 ° to the display control device 1 together with the identification information stored in the storage unit 21. The control unit 10 of the display control device 1 acquires the identification information of the image display device α and the rotation angle 135 ° from the image display device α.

  The control unit 10 of the display control device 1 reads the display image table 11a corresponding to the acquired identification information from the storage unit 11, and determines that the currently set mode is the default mode. Then, the control unit 10 determines the transmission destination image display devices α, β, γ, and δ based on the acquired rotation angle and the currently set default mode from the read display image table 11a. The display image information to be transmitted to each of the image display devices α, β, γ, and δ is read out.

  The control unit 10 transmits the display image information read from the display image table 11a to the image display devices α, β, γ, and δ indicated by the identification information of the transmission destination device read from the display image table 11a. Here, the image information of image1, image1, image3, and image4 is transmitted to the image display devices α, β, γ, and δ, respectively. That is, when the state shown in FIG. 4A is changed to the state shown in FIG. 4B, the image information displayed on the image display device β is changed from the image 2 image to the image 1 image. Accordingly, the presenter directs the image display device α used by the presenter toward the image display device β, thereby causing the image display device β to display the same image as the image displayed on the image display device α. be able to. Therefore, a necessary image can be provided only to a viewer of the image display device β without being viewed by a viewer of the image display devices γ and δ.

  Similarly, when the display direction of the image display device α is changed to the image display device γ as shown in FIG. 4C, the control unit 10 of the display control device 1 controls the image display devices α, β. , Γ, and δ, image information of image1, image2, image1, and image4 are transmitted. That is, when the state shown in FIG. 4A is changed to the state shown in FIG. 4C, the image information displayed on the image display device γ is changed from the image 3 image to the image 1 image.

  When the display direction of the image display device α is changed to the image display device δ as shown in FIG. 4D, the control unit 10 of the display control device 1 controls the image display devices α, β, γ. , Δ are transmitted to image information of image1, image2, image3, and image1, respectively. That is, when the state shown in FIG. 4A is changed to the state shown in FIG. 4D, the image information displayed on the image display device δ is changed from the image 4 image to the image 1 image.

  Next, a case where the dual display mode is set will be described. FIG. 5A shows a state in which different images are displayed on the image display devices α, β, γ, and δ, respectively, and even in the dual display mode, the image display devices α, β, γ, and δ are displayed. The images of image1, image2, image3, and image4 are displayed respectively. In the state shown in FIG. 5A, when the display direction of the image display device α is changed to the image display device β as shown in FIG. 5B, the control unit 20 of the image display device α The rotation angle sensor 24 detects a rotation angle of 135 °. The control unit 20 notifies the detected 135 ° to the display control device 1 together with the identification information stored in the storage unit 21. The control unit 10 of the display control device 1 acquires the identification information of the image display device α and the rotation angle 135 ° from the image display device α.

  The control unit 10 of the display control device 1 reads the display image table 11a corresponding to the acquired identification information from the storage unit 11, and determines that the currently set mode is the dual display mode. Then, the control unit 10 identifies the transmission destination image display devices α, β, γ, and δ based on the acquired rotation angle and the currently set dual display mode from the read display image table 11a. And display image information to be transmitted to each of the image display devices α, β, γ, and δ.

  The control unit 10 transmits the display image information read from the display image table 11a to the image display devices α, β, γ, and δ indicated by the identification information of the transmission destination device read from the display image table 11a. In the case of the dual display mode, the image display device β positioned in the display direction of the image display device α includes the image1 displayed on the image display device α and the image2 displayed on the image display device β. It is set to display images. Therefore, the control unit 10 combines the image information of image1 and the image information of image2 to generate one piece of image information. The control unit 10 transmits the image information of image1, image3, and image4 to the image display devices α, γ, and δ, and transmits the combined image information of image1 and image2 to the image display device β.

  That is, when the state shown in FIG. 5A is changed to the state shown in FIG. 5B, the image information displayed on the image display device β changes from the image 2 image to the composite image of image 1 and image 2. Be changed. Thus, the presenter directs the image display device α used by the presenter toward the image display device β, so that the same image as the image displayed on the image display device α is originally displayed on the image display device β. An image displayed on the image display device β can be displayed. Therefore, a necessary image can be provided only to a viewer of the image display device β without being seen by a viewer of the image display devices γ, δ, and originally provided to a viewer of the image display device β. You can continue providing images. Further, by displaying two images on the image display device β, a viewer of the image display device β can compare the two images.

  Similarly, when the display direction of the image display device α is changed to the image display device γ as shown in FIG. 5C, the control unit 10 of the display control device 1 controls the image display devices α, β. , Δ, and image information of image1, image2, and image4 are transmitted to image display device γ, and the combined image information of image1 and image3 is transmitted to image display device γ. That is, when the state shown in FIG. 5A is changed to the state shown in FIG. 5C, the image information displayed on the image display device γ is changed from the image 3 image to the composite image of image 1 and image 3. Be changed.

  When the display direction of the image display device α is changed to the image display device δ as shown in FIG. 5D, the control unit 10 of the display control device 1 controls the image display devices α, β, γ. The image information of image1, image2, and image3 is transmitted to the image display device δ, and the combined image information of image1 and image4 is transmitted to the image display device δ. That is, when the state shown in FIG. 5A is changed to the state shown in FIG. 5D, the image information displayed on the image display device δ is changed from the image 4 image to the composite image of image 1 and image 4. Be changed.

  Next, a case where the confidential display mode is set will be described. FIG. 6A shows a state in which different images are displayed on the image display devices α, β, γ, and δ. In the confidential display mode, the image display devices α, β, γ, Images of image1, image2, image3, and image4 are displayed in δ, respectively. In the state shown in FIG. 6A, when the display direction of the image display device α is changed to the image display device β as shown in FIG. 6B, the control unit 20 of the image display device α The rotation angle sensor 24 detects a rotation angle of 135 °. The control unit 20 notifies the detected 135 ° to the display control device 1 together with the identification information stored in the storage unit 21. The control unit 10 of the display control device 1 acquires the identification information of the image display device α and the rotation angle 135 ° from the image display device α.

  The control unit 10 of the display control device 1 reads the display image table 11a corresponding to the acquired identification information from the storage unit 11, and determines that the currently set mode is the confidential display mode. Then, the control unit 10 identifies the transmission destination image display devices α, β, γ, and δ based on the acquired rotation angle and the currently set confidential display mode from the read display image table 11a. Information and display image information to be transmitted to each of the image display devices α, β, γ, and δ are read out.

  The control unit 10 transmits the display image information read from the display image table 11a to the image display devices α, β, γ, and δ indicated by the identification information of the transmission destination device read from the display image table 11a. In the confidential display mode, the image display device β positioned in the display direction of the image display device α displays the image of the image 1 displayed on the image display device α, and the other image display devices α and γ. , Δ are set so that nothing is displayed. Therefore, the control unit 10 transmits the image information of image1 only to the image display device β.

  That is, when the state shown in FIG. 6A is changed to the state shown in FIG. 6B, the image information displayed on the image display device β is changed from the image 2 image to the image 1 image. Display of images on the image display devices α, γ, and δ is stopped. As a result, the presenter directs the image display device α used by the presenter toward the image display device β, thereby causing the image display device β to display the same image as the image displayed on the image display device α. The display of images on the other image display devices α, γ, and δ can be stopped.

  Therefore, a necessary image can be provided to a viewer of the image display device β, and an unnecessary image can be prevented from being provided to a viewer of another image display device α, γ, δ. Further, for example, the user (presenter) of the image display device α is only a specific participant (viewer) in a state where the same image is displayed on all the image display devices α, β, γ, and δ. When confidential information is to be provided, the confidential information is displayed only on the intended image display device by directing the image display device α to one of the image display devices β, γ, and δ used by a specific participant. Can be made.

  Here, the configuration is such that when the image display device α is directed toward the image display device β, the same image as the image displayed on the image display device α is displayed on the image display device β. The image information may be displayed on the image display device β. In that case, image information to be displayed on the image display device 2 to which the image display device α is directed may be registered in the storage unit 11 in advance.

  Similarly, when the display direction of the image display device α is changed to the image display device γ as shown in FIG. 6C, the control unit 10 of the display control device 1 sends image1 to the image display device γ. And the transmission of the image information to the image display devices α, β, δ is stopped. That is, when the state shown in FIG. 6A is changed to the state shown in FIG. 6C, the image information displayed on the image display device γ is changed from the image 3 image to the image 1 image. The image display on the display devices α, β, δ is stopped.

  When the display direction of the image display device α is changed to the image display device δ as shown in FIG. 6D, the control unit 10 of the display control device 1 sends the image 1 to the image display device δ. The information is transmitted, and the transmission of the image information to the image display devices α, β, γ is stopped. That is, when the state shown in FIG. 6A is changed to the state shown in FIG. 6D, the image information displayed on the image display device δ is changed from the image 4 image to the image 1 image. The image display on the display devices α, β, δ is stopped.

  Below, the process performed when the control part 10 of the display control apparatus 1 transmits image information to each of the image display apparatuses 2 and 2 is demonstrated. FIG. 7 is a flowchart showing a procedure of processing in which the display control apparatus 1 transmits image information to the image display apparatuses 2 and 2. The following processing is executed by the control unit 10 of the display control apparatus 1 and also by the control unit 20 of the image display apparatuses 2 and 2. In FIG. 7, in the two regions separated by the alternate long and short dash line, the processing by the control unit 10 of the display control device 1 is performed in the left region and the processing by the control unit 20 of the image display devices 2 and 2 is performed in the right region. Show.

  The control units 20 of the image display devices 2 and 2 that have been started up after the power is turned on detect the rotation angle by the rotation angle sensor 24 (S1). The control unit 20 that has detected the rotation angle reads the identification information stored in the storage unit 21, and transmits the detected rotation angle together with the read identification information to the display control device 1 (S2). On the other hand, the control unit 10 of the display control apparatus 1 that has been turned on and completed the startup process is in a state of waiting for the rotation angle transmitted from the image display apparatuses 2 and 2, and thus the image display apparatuses 2 and 2. It is determined whether or not the rotation angle is received from (S3).

  When determining that the rotation angle has been received (S3: YES), the control unit 10 identifies the image display device 2 that has transmitted the rotation angle (S4). In addition, the control part 10 specifies the image display apparatus 2 of a transmission source by extracting identification information from the received information. The control unit 10 specifies the display mode set in the display control device 1 (S5). Note that, when the display mode is set in the display control device 1, information indicating the set display mode is stored in a predetermined area of the storage unit 11. Therefore, the control unit 10 specifies the currently set display mode based on the information stored in the predetermined area of the storage unit 11.

  Based on the transmission source image display device 2 identified in step S4, the rotation angle received from the transmission source image display device 2, and the display mode identified in step S5, the control unit 10 controls each of the image display devices 2 and 2. The image information to be transmitted is specified (S6). Here, the control unit 10 first reads a display image table 11a corresponding to the transmission source image display device 2 specified in step S4 from the storage unit 11. Next, the control unit 10 corresponds to each of the image display devices 2 and 2 corresponding to the rotation angle received from the transmission source image display device 2 and the display mode specified in step S5 from the read display image table 11a. The image information to be transmitted to is read out.

  The control unit 10 transmits the image information read from the display image table 11a to the corresponding image display devices 2 and 2 (S7). The display control device 1 selects image information to be transmitted to the image display devices 2 and 2 based on the rotation angle of the image display devices 2 and 2 as described above immediately after the image display devices 2 and 2 are activated. Instead, image information registered in advance may be transmitted to each of the image display devices 2 and 2.

  The control unit 10 of the display control device 1 that has started transmission of image information to the image display devices 2 and 2 is instructed to end the process when the user of the display control device 1 operates an operation unit (not shown), for example. It is determined whether or not (S8). If it is determined that the end of the process has not been instructed (S8: NO), the control unit 10 returns the process to step S3, and determines whether the rotation angle has been received from one of the image display devices 2 and 2. (S3).

  On the other hand, the control unit 20 of the image display device 2 that has received the image information from the display control device 1 causes the image display unit 22 to display an image based on the received image information (S9). Further, the control unit 20 determines whether or not the display direction of the image display unit 22 has been changed based on the rotation angle detected by the rotation angle sensor 24 (S10). If it is determined that the display direction of the image display unit 22 has not been changed (S10: NO), the control unit 20 returns the process to step S9 and sequentially receives the image information transmitted from the display control device 1. The image is displayed on the image display unit 22.

  When it is determined that the display direction of the image display unit 22 has been changed (S10: YES), the control unit 20 of the image display device 2 returns the process to step S1, and detects the rotation angle by the rotation angle sensor 24 (S1). . The control unit 20 transmits the detected rotation angle together with the identification information stored in the storage unit 21 to the display control device 1 (S2). When receiving the rotation angle transmitted from the image display device 2 (S3: YES), the control unit 10 of the display control device 1 repeats the subsequent steps S4 to S8. Thereby, whenever the display direction of the image display apparatuses 2 and 2 is changed, the image displayed on each of the image display apparatuses 2 and 2 can be changed according to the changed display direction.

  On the other hand, when the control unit 10 of the display control device 1 determines that the rotation angle transmitted from the image display device 2 has not been received (S3: NO), the process proceeds to step S7. And the control part 10 transmits the image information already specified by step S6 to the corresponding image display apparatuses 2 and 2, respectively (S7). The control unit 10 repeats the above-described process until the end of the process is instructed, and ends the process when determining that the end of the process is instructed (S8: YES).

  As described above, the image display devices α, β, γ, and δ that display images based on the image information transmitted from the display control device 1 change the display when the display direction is changed. The direction is notified to the display control device 1. Then, the display control device 1 selects each image display device α according to the display direction (rotation angle) notified from each image display device α, β, γ, δ and the currently set display mode. , Β, γ, and δ are changed. Therefore, the viewer of the image display devices 2 and 2 points the image display device 2 in use toward the image display device 2 in use by another viewer, so that other viewers are using it. Desired information can be displayed on the image display device 2, and desired information can be provided to other viewers.

  In the first embodiment described above, the control unit 20 of the image display devices 2 and 2 detects rotation angles of 0 °, 135 °, 180 °, and 225 ° as the display direction of the image display unit 22 by the rotation angle sensor 24. An example was described. However, the image display unit 22 is not necessarily rotated in the directions of 0 °, 135 °, 180 °, and 225 °. Therefore, the rotation angle acquired by the display control device 1 from the image display device 2 may not match the rotation angle stored in the display image table 11a. In this case, if the control unit 10 processes the rotation angle closest to the rotation angle acquired from the image display device 2 among the rotation angles stored in the display image table 11 a as the display direction of the image display device 2. Good.

  Specifically, when notified of the rotation angle of 120 ° from the image display device 2, the control unit 10 of the display control device 1 sets 135 ° closest to 120 ° as the rotation angle of the image display device 2. And the control part 10 should just select the image information according to the rotation angle of 135 degrees from the display image table 11a as image information which should be transmitted to the image display apparatuses 2 and 2. FIG.

  When the dual display mode is set, for example, when the image display device α is directed toward the image display device β, the display control device 1 according to the first embodiment described above displays an image being displayed on the image display device α, an image The composite image obtained by combining the image being displayed on the display device β is displayed on the image display device β. In addition to such a configuration, a configuration in which the image display apparatus 2 performs a process of combining two images may be used. Specifically, the display control device 1 transmits the image being transmitted to the image display device α and the image being transmitted to the image display device β to the image display device β, and the image display device β has received 2 Two images may be combined and displayed on the image display unit 22. In this case, the processing burden on the display control device 1 can be reduced.

  In addition, when the display control apparatus 1 tries to transmit image information to any one of the image display apparatuses 2, when the user is operating in the image display apparatus 2, the dual display mode is activated to An image may be displayed on the image display device 2. Accordingly, it is possible to prevent the display image of the image display device β from being changed by changing the display direction of the image display device α even though the user is operating the image display device β.

(Embodiment 2)
The display control system according to the second embodiment will be described below. Since the display control system of the second embodiment can be realized by the same configuration as the display control system 100 of the first embodiment described above, description of the configuration is omitted.

  In the first embodiment described above, the image information to be transmitted to the respective image display devices 2 and 2 is registered in the display image table 11a according to the rotation angle of the respective image display devices 2 and 2, as shown in FIG. It was. Using such a display image table 11a, the display control device 1 allows the image information to be transmitted to each of the image display devices 2 and 2 when the display direction of either of the image display devices 2 and 2 is changed. Was changed as appropriate.

  The display control apparatus 1 according to the second embodiment stores images to be displayed on the plurality of image display apparatuses 2 and 2 in the storage unit 11 for each of the image display apparatuses 2 and 2, and after the image display apparatuses 2 and 2 are activated. The image stored in the storage unit 11 is transmitted to the image display devices 2 and 2 and displayed. In addition, the display control apparatus 1 according to the second embodiment can set the display mode among the default mode, the dual display mode, and the confidential display mode.

  When the display direction of either of the image display devices 2 and 2 is changed when the default mode is set, the display control device 1 according to the second embodiment is another image display device positioned in the changed display direction. 2. The image displayed on the image display device 2 whose display direction has been changed is displayed. In addition, when the display direction of either one of the image display devices 2 and 2 is changed when the dual display mode is set, the display control device 1 according to the second embodiment displays another image that is positioned in the changed display direction. The device 2 displays both the image displayed on the image display device 2 and the image displayed on the image display device 2 whose display direction has been changed. Furthermore, when the display direction of either one of the image display devices 2 and 2 is changed when the confidential display mode is set, the display control device 1 according to the second embodiment has another image positioned in the changed display direction. The image displayed on the image display device 2 whose display direction has been changed is displayed on the display device 2, and the display of the image on the other image display devices 2 and 2 is stopped.

  FIG. 8 is a schematic diagram showing the stored contents of the display image table 11a of the second embodiment. In the display image table 11a of the second embodiment, the rotation angle of the image display devices 2 and 2, the identification information of the transmission destination device, and the like are stored in association with the identification information of the image display devices 2 and 2. The identification information and the rotation angle of the image display devices 2 and 2 in the display image table 11a are the same as the information described in the first embodiment. Note that the identification information of the image display device 2 as the transmission destination is the image display device positioned in the display direction of the image display unit 22 when the image display devices 2 and 2 of the respective identification information are rotated at respective rotation angles. 2 and 2 identification information. That is, when the image display device α is rotated by 135 °, the image display device β is positioned in the display direction of the image display device α.

  Hereinafter, when the display control system 100 according to the second embodiment is applied to a conference system used for a conference held by one presenter and a plurality of participants (viewers), the display control device 1 and Processing performed by the image display apparatuses 2 and 2 will be described. The control unit 10 of the display control device 1 that has completed the start-up process reads the image information stored in the storage unit 11 as an image to be transmitted to the image display devices 2 and 2, and displays the read image information corresponding to each image display. Transmit to devices 2 and 2.

  The control units 20 of the image display devices 2 and 2 that have completed the start-up process display the image information transmitted from the display control device 1 on the image display unit 22, thereby starting display of the screen. The control unit 20 of the image display devices 2 and 2 that displays the image information transmitted from the display control device 1 changes the display direction of the image display unit 22 based on the rotation angle detected by the rotation angle sensor 24. It is determined whether or not. When the control unit 20 detects that the display direction of the image display unit 22 has been changed, the control unit 20 notifies the display control device 1 of the rotation angle detected by the rotation angle sensor 24 together with the identification information stored in the storage unit 21. To do.

  The control unit 10 of the display control device 1 that has started transmitting image information to the image display devices 2 and 2 acquires the rotation angle from the image display device 2 in which the display direction of the image display unit 22 has been changed. When acquiring the identification information and the rotation angle from the image display device 2, the control unit 10 determines whether or not the image information transmitted to the image display devices 2 and 2 should be changed, and displays the image as necessary. The image information transmitted to the devices 2 and 2 is changed.

  Specifically, when the control unit 10 of the display control device 1 acquires the identification information and the rotation angle of any one of the image display devices 2, the control unit 10 has transmitted the identification information and the rotation angle based on the acquired identification information. The image display device 2 (source image display device 2) is specified. Further, the control unit 10 reads out the identification information of the identified image display device 2 of the transmission source and the identification information of the image display device 2 of the transmission destination corresponding to the rotation angle from the display image table 11a shown in FIG. Furthermore, the control unit 10 determines which of the default mode, the dual display mode, and the confidential display mode is set.

  When determining that the default mode is set, the control unit 10 transmits the image information to be transmitted to the transmission destination image display device 2 indicated by the identification information of the transmission destination device read from the display image table 11a. The image information is changed to the image information transmitted to the display device 2. Thereby, when the display direction of any one of the image display devices 2 is changed, the same image as the image display device 2 whose display direction has been changed is displayed on the image display device 2 in the changed display direction. be able to.

  For example, a case where the display direction of the image display device α is changed from the state shown in FIG. 4A to the image display device β as shown in FIG. 4B will be described. In this case, the control unit 20 of the image display device α detects the rotation angle 135 ° by the rotation angle sensor 24 and notifies the display control device 1 of the detected 135 ° together with the identification information stored in the storage unit 21. . Based on the acquired identification information, the control unit 10 of the display control device 1 specifies the image display device 2 that is the transmission source of the identification information and the rotation angle as the image display device α. From the display image table 11a shown in FIG. 8, the control unit 10 specifies the image display device α that is the transmission destination corresponding to the image display device α and the rotation angle of 135 ° as the image display device β. Then, the control unit 10 changes the image information transmitted to the image display device β that is the image display device 2 that is the transmission destination, to the image information of image1 that is transmitted to the image display device α that is the transmission source. Note that the control unit 10 does not change the image information transmitted to the other image display devices α, γ, and δ.

  Thereby, when the default mode is set, when the state shown in FIG. 4A is changed to the state shown in FIG. 4B, the image information displayed on the image display device β is changed from the image of image2. Changed to image1. Accordingly, the presenter directs the image display device α used by the presenter toward the image display device β, thereby causing the image display device β to display the same image as the image displayed on the image display device α. be able to. Therefore, a necessary image can be provided only to a viewer of the image display device β without being viewed by a viewer of the image display devices γ and δ.

  On the other hand, when determining that the dual display mode is set, the control unit 10 transmits the image information transmitted to the transmission destination image display device 2 indicated by the identification information of the transmission destination device read from the display image table 11a. The information is changed to composite information of the image information transmitted to the transmission destination image display device 2 and the image information transmitted to the transmission source image display device 2. Thereby, when the display direction of any one of the image display devices 2 is changed, the image originally displayed on the image display device 2 in the changed display direction and the image display device in which the display direction is changed are displayed. 2 can be displayed.

  For example, a case where the display direction of the image display device α is changed from the state shown in FIG. 5A to the image display device β as shown in FIG. 5B will be described. Even in the dual display mode, the control unit 10 of the display control device 1 acquires the identification information and the rotation angle from the image display device α, and based on the acquired identification information, the image display of the transmission source of the identification information and the rotation angle. The device 2 is specified as the image display device α. Further, the control unit 10 identifies the image display device 2 as the transmission destination corresponding to the image display device α and the rotation angle 135 ° from the display image table 11a illustrated in FIG.

  Here, when setting the dual display mode, the control unit 10 transmits the image information of image1 transmitted to the image display device α and the image display device β as image information to be transmitted to the image display device β. Composite information is generated by combining the image information of image2. The control unit 10 transmits the generated composite information to the image display device β. Note that the control unit 10 does not change the image information transmitted to the other image display devices α, γ, and δ.

  Accordingly, when the dual display mode is set, when the state shown in FIG. 5A is changed to the state shown in FIG. 5B, the image information displayed on the image display device β is the image of image2. To the composite image of image1 and image2. Therefore, when the presenter directs the image display device α used by the presenter toward the image display device β, the same image as the image displayed on the image display device α is displayed on the image display device β. An image displayed on the display device β can be displayed. Therefore, a necessary image can be provided only to a viewer of the image display device β without being seen by a viewer of the image display devices γ, δ, and originally provided to a viewer of the image display device β. You can continue providing images.

  When determining that the confidential display mode is set, the control unit 10 transmits the image information to be transmitted to the destination image display device 2 indicated by the identification information of the destination device read from the display image table 11a. The image information is changed to the image information transmitted to the image display device 2 as the transmission source, and the transmission of the image information to the other image display devices 2 and 2 is stopped. Thereby, when the display direction of any of the image display devices 2 is changed, the same image as the image display device 2 whose display direction has been changed is displayed on the image display device 2 in the changed display direction. The image display by the other image display devices 2 and 2 can be stopped.

  For example, a case where the display direction of the image display device α is changed from the state shown in FIG. 6A to the image display device β as shown in FIG. 6B will be described. Even in the confidential display mode, the control unit 10 of the display control device 1 acquires the identification information and the rotation angle from the image display device α, and based on the acquired identification information, the transmission source image of the identification information and the rotation angle. The display device 2 is specified as the image display device α. Further, the control unit 10 identifies the image display device 2 as the transmission destination corresponding to the image display device α and the rotation angle 135 ° from the display image table 11a illustrated in FIG.

  Here, when the confidential display mode is set, the control unit 10 transmits the image information of image1 transmitted to the image display device α to the image display device β. Note that the control unit 10 stops transmission of image information to the other image display devices α, γ, and δ. Thus, when the confidential display mode is set, when the state shown in FIG. 6A is changed to the state shown in FIG. 6B, the image information displayed on the image display device β is image2. The image is changed to the image 1 and the image display by the other image display devices α, γ, and δ is stopped.

  Therefore, the presenter directs the image display device α used by the presenter toward the image display device β, thereby causing the image display device β to display the same image as the image displayed on the image display device α. Can do. Therefore, a necessary image can be provided only to a viewer of the image display device β without being viewed by a viewer of the image display devices γ and δ. Further, by not displaying images on the other image display devices α, γ, and δ, it is possible to prevent unnecessary images from being provided to viewers of the image display devices α, γ, and δ.

  As described above, when the image display device α is directed toward the image display device β, the image display device β is not limited to a configuration that displays the same image as the image displayed on the image display device α. Absent. For example, when the image display device α is directed toward the image display device β, an image to be displayed on the image display device β is stored in the storage unit 11 in advance, and the image information stored in the storage unit 11 is stored as an image. It may be displayed on the display device β.

  Below, the process performed when the control part 10 of the display control apparatus 1 transmits image information to each of the image display apparatuses 2 and 2 is demonstrated. FIGS. 9 and 10 are flowcharts showing a procedure of processing in which the display control apparatus 1 transmits image information to the image display apparatuses 2 and 2. The following processing is executed by the control unit 10 of the display control apparatus 1 and also by the control unit 20 of the image display apparatuses 2 and 2. In FIG. 9, in the two regions separated by the one-dot chain line, the processing by the control unit 10 of the display control device 1 is performed on the left region, and the processing by the control unit 20 of the image display devices 2 and 2 is performed on the right region. Show.

  The control unit 10 of the display control device 1 that has been powered on and completed the startup process specifies image information to be transmitted to each of the image display devices 2 and 2 from the image information stored in the storage unit 11 in advance. (S21). The control unit 10 reads the specified image information from the storage unit 11 and transmits it to each of the image display devices 2 and 2 (S22).

  The control unit 20 of the image display devices 2 and 2 displays an image on the image display unit 22 based on the image information received from the display control device 1 (S23). Further, the control unit 20 determines whether or not the display direction of the image display unit 22 has been changed based on the rotation angle detected by the rotation angle sensor 24 (S24). When it is determined that the display direction of the image display unit 22 has not been changed (S24: NO), the control unit 20 returns the process to step S23 and sequentially receives the image information transmitted from the display control device 1. The image is displayed on the image display unit 22.

  When it is determined that the display direction of the image display unit 22 has been changed (S24: YES), the control unit 20 of the image display device 2 detects the rotation angle by the rotation angle sensor 24 (S25). The control unit 20 transmits the detected rotation angle together with the identification information stored in the storage unit 21 to the display control device 1 (S26). The control unit 10 of the display control apparatus 1 that has started transmitting image information to the image display apparatuses 2 and 2 determines whether or not the rotation angle has been received from the image display apparatuses 2 and 2 (S27).

  When it is determined that the rotation angle is received from the image display device 2 (S27: YES), the control unit 10 displays the image of the transmission source that has transmitted the identification information and the rotation angle based on the identification information received together with the rotation angle. The device 2 is specified (S29). The control unit 10 specifies the transmission destination image display device 2 based on the identified identification information of the transmission source image display device 2 and the acquired rotation angle from the display image table 11a shown in FIG. 8 (S30).

  The control unit 10 determines whether or not the default mode is currently set (S31). If it is determined that the default mode is set (S31: YES), the control unit 10 sets the image information to be transmitted to the transmission destination image display device 2 identified in step S30 as the source image identified in step S29. The image information is transmitted to the display device 2 (S32). Then, the control unit 10 transmits the image information transmitted to the transmission source image display device 2 to the transmission destination image display device 2 (S22). The control unit 10 continues to transmit the image information specified in step S21 to the image display devices 2 and 2 other than the transmission destination image display device 2.

  When it is determined that the default mode is not set (S31: NO), the control unit 10 determines whether or not the dual display mode is currently set (S33). When it is determined that the dual display mode is set (S33: YES), the control unit 10 transmits the image information transmitted to the transmission destination image display device 2 specified in step S30 and the transmission specified in step S29. The image information transmitted to the original image display device 2 is combined. Thereby, the control part 10 produces | generates and changes the image information transmitted to the image display apparatus 2 of the transmission destination specified by step S30 (S34). And the control part 10 transmits the produced | generated synthetic | combination image information to the image display apparatus 2 of a transmission destination (S22). The control unit 10 continues to transmit the image information specified in step S21 to the image display devices 2 and 2 other than the transmission destination image display device 2.

  When it is determined that the dual display mode is not set (S33: NO), that is, when the confidential display mode is set, the control unit 10 transmits image information to be transmitted to all the image display apparatuses 2 and 2. Change (S35). Specifically, the control unit 10 changes the image information transmitted to the transmission destination image display device 2 identified in step S30 to the image information transmitted to the transmission source image display device 2 identified in step S29. To do. In addition, the control unit 10 prevents image information from being transmitted to the image display apparatuses 2 and 2 other than the image display apparatus 2 that is the transmission destination.

  Note that the control unit 10 may change the image information to be transmitted to the image display devices 2 and 2 other than the destination image display device 2 to a white image, a black image, or a predetermined image having no confidentiality. Then, the control unit 10 transmits the image information transmitted to the transmission source image display device 2 to the transmission destination image display device 2 (S22), and the other image display devices 2 and 2 store the image information. Do not send.

  On the other hand, when it is determined in step S27 that the rotation angle has not been received from the image display device 2 (S27: NO), the control unit 10 performs processing by operating the operation unit by the user of the display control device 1, for example. It is determined whether termination is instructed (S28). If it is determined that the end of the process has not been instructed (S28: NO), the control unit 10 returns the process to step S22, and the image information already specified in step S21 or the steps S32, S34, and S35 as appropriate. The changed image information is transmitted to the corresponding image display devices 2 and 2 (S22). The control unit 10 repeats the above-described process until the end of the process is instructed, and when it is determined that the end of the process is instructed (S28: YES), the process ends.

  As described above, when the display direction of any one of the image display devices 2 is changed, the display control device 1 according to the second embodiment transmits image information to the image display device 2 positioned in the changed display direction. Is changed according to the set display mode. Therefore, the viewer of the image display devices 2 and 2 points the image display device 2 in use toward the image display device 2 in use by another viewer, so that other viewers are using it. Desired information can be displayed and provided on the image display device 2.

  When the display direction of any one of the image display devices 2 and 2 is changed, the display control device 1 of the second embodiment described above is based on the rotation angle acquired from the image display device 2 whose display direction has been changed. The transmission image display device 2 is specified from the display image table 11a shown in FIG. In addition, for example, a configuration in which infrared communication or the like is performed between the image display devices 2 and 2 and the other image display devices 2 positioned in the display direction of the respective image display devices 2 may be specified. In addition, a predetermined identification image is given to each of the image display devices 2 and 2, and an image capturing unit such as a CCD camera is provided, and is included in an image obtained by imaging the display direction of each of the image display devices 2 and 2. Another image display device 2 positioned in the display direction may be specified based on the identified image.

  In Embodiment 2 mentioned above, when the display direction of either of the image display apparatuses 2 and 2 is changed, the other image display apparatus 2 located in the changed display direction is specified, and the specified image display apparatus 2 is specified. Further, the image displayed on the image display device 2 whose display direction has been changed is displayed. In addition to this, for example, when image information to be transmitted to the image display device 2 positioned in the changed display direction is registered in advance, and the display direction of either of the image display devices 2 and 2 is changed, You may make it transmit the image information registered beforehand to the image display apparatus 2 located in the changed display direction.

(Embodiment 3)
The display control system according to Embodiment 3 will be described below. Since the display control system of the third embodiment can be realized by the same configuration as the display control system 100 of the second embodiment described above, description of the configuration is omitted.

  In the first and second embodiments described above, the display control device 1 holds images to be displayed on the image display devices 2 and 2 in advance, and after the image display devices 2 and 2 are activated, and after the image display devices 2 and 2 are displayed. According to the rotation angle, an appropriate image is selected from the held images and transmitted to the image display devices 2 and 2 for display.

  In the third embodiment, the images to be displayed on the image display devices 2 and 2 are not set in advance, and the user (presenter and viewer) of the image display devices 2 and 2 operates the operation unit 25 to display the images. An arbitrary image stored in the control device 1 is acquired and displayed on the image display unit 22. Note that the display control apparatus 1 according to the third embodiment stores a plurality of pieces of image information in the storage unit 11 in advance and operates as a file server, and displays image information corresponding to requests from the image display apparatuses 2 and 2 for each image. It transmits to the display devices 2 and 2. The display control device 1 manages the image information transmitted to the respective image display devices 2 and 2, that is, the image information that each image display device 2 and 2 is currently displaying.

  The display control apparatus 1 according to the third embodiment has the configuration shown in FIG. 2 and stores the display image table 11a shown in FIG. 8 in the storage unit 11 as well as a display status table as shown in FIG. Is stored in the storage unit 11. FIG. 11 is a schematic diagram showing the contents stored in the display status table. The display status table stores information on the image currently displayed on each image display device 2, 2 in association with the identification information of the image display devices 2, 2. In the display status table shown in FIG. 11, the information on the image being displayed on each image display device 2, 2 is indicated by the file name and the number of pages of the image information stored in the storage unit 11. Is not limited to the file name and the number of pages.

  The contents of the display status table are stored as needed by the control unit 10 when the display control device 1 controls image information to be displayed on the image display devices 2 and 2 in response to a request from the image display devices 2 and 2. Updated. By using such a display status table, the display control device 1 can grasp which image is currently transmitted and displayed for each of the image display devices 2 and 2.

  Hereinafter, when the display control system 100 according to the third embodiment is applied to a conference system used for a conference held by one presenter and a plurality of participants (viewers), the display control device 1 and Processing performed by the image display apparatuses 2 and 2 will be described. In the image display device 2 that has completed the start-up process, the user (presenter and viewer) operates the operation unit 25 to change the image information stored in the storage unit 11 of the display control device 1 that is a file server. Select and request arbitrary image information from within.

  The control unit 10 of the display control device 1 that has completed the start-up process reads the image information requested from the image display devices 2 and 2 from the storage unit 11, and transmits the read image information to the corresponding image display devices 2 and 2, respectively. To do. When the image information is transmitted to each of the image display devices 2 and 2, the control unit 10 of the display control device 1 corresponds to the identification information of the image display devices 2 and 2 and transmits the information (image image). Information on the images being displayed on the display devices 2 and 2) is registered in the display status table.

  The control unit 20 of the image display devices 2 and 2 causes the image information transmitted from the display control device 1 to be displayed on the image display unit 22 and starts displaying the screen. The control units 20 of the image display apparatuses 2 and 2 that have started displaying the screen accept a page movement in the image being displayed, a request for new image information, and the like when the user operates the operation unit 25. When receiving the movement of the page in the currently displayed image, the control unit 20 requests the image information of the image of the next page of the currently displayed image from the display control device 1 and receives a request for new image information. In this case, the display control device 1 is requested for the requested image information.

  The control unit 10 of the display control device 1 requested for image information from the image display devices 2 and 2 reads the requested image information from the storage unit 11 and transmits the read image information to the image display devices 2 and 2. Then, the control unit 10 updates the information on the image being displayed in the display status table to the information on the image information transmitted to the image display devices 2 and 2.

  The control units 20 of the image display devices 2 and 2 that have started displaying the screen determine whether or not the display direction of the image display unit 22 has been changed based on the rotation angle detected by the rotation angle sensor 24. When the control unit 20 detects that the display direction of the image display unit 22 has been changed, the control unit 20 notifies the display control device 1 of the rotation angle detected by the rotation angle sensor 24 together with the identification information stored in the storage unit 21. To do.

  When the control unit 10 of the display control device 1 acquires the identification information and the rotation angle from the image display device 2 in which the display direction of the image display unit 22 is changed, the control unit 10 determines the identification information and the rotation angle based on the acquired identification information. The transmitting image display device 2 (transmission source image display device 2) is specified. Further, the control unit 10 reads out the identification information of the identified image display device 2 of the transmission source and the identification information of the image display device 2 of the transmission destination corresponding to the rotation angle from the display image table 11a shown in FIG. Furthermore, the control unit 10 determines which of the default mode, the dual display mode, and the confidential display mode is set.

  When determining that the default mode is set, the control unit 10 transmits the image information to be transmitted to the transmission destination image display device 2 indicated by the identification information of the transmission destination device read from the display image table 11a. The image information is changed to the image information transmitted to the display device 2. The control unit 10 specifies the image information transmitted to the image display device 2 that is the transmission source based on the display status table. Therefore, for example, when the display direction of the image display device α is changed from the state shown in FIG. 4A to the image display device β as shown in FIG. 4B, the image display device β. The image information transmitted to the image display device α is changed to the image information transmitted to the image display device α (image information on the fourth page with the file name 111.ppt). Accordingly, the presenter directs the image display device α used by the presenter toward the image display device β, thereby causing the image display device β to display the same image as the image displayed on the image display device α. be able to.

  On the other hand, when determining that the dual display mode is set, the control unit 10 transmits the image information transmitted to the transmission destination image display device 2 indicated by the identification information of the transmission destination device read from the display image table 11a. The information is changed to composite information of the image information transmitted to the transmission destination image display device 2 and the image information transmitted to the transmission source image display device 2. Specifically, for example, when the display direction of the image display device α is changed from the state shown in FIG. 5A to the image display device β as shown in FIG. As image information transmitted to the display device β, image information transmitted to the image display device α (the fourth page of the file name 111.ppt) and image information transmitted to the image display device β (file name 222.doc) 3rd page), and change to the obtained composite information. Thus, the presenter directs the image display device α used by the presenter toward the image display device β, so that the same image as the image displayed on the image display device α is originally displayed on the image display device β. An image displayed on the image display device β can be displayed.

  When determining that the confidential display mode is set, the control unit 10 transmits the image information to be transmitted to the destination image display device 2 indicated by the identification information of the destination device read from the display image table 11a. The image information is changed to the image information transmitted to the image display device 2 as the transmission source, and the transmission of the image information to the other image display devices 2 and 2 is stopped. Specifically, for example, when the display direction of the image display device α is changed to the image display device β as shown in FIG. 6B from the state shown in FIG. The image information (the fourth page of the file name 111.ppt) transmitted to the display device α is transmitted to the image display device β. Note that the control unit 10 stops transmission of image information to the other image display devices α, γ, and δ.

  Accordingly, the presenter directs the image display device α used by the presenter toward the image display device β, thereby causing the image display device β to display the same image as the image displayed on the image display device α. be able to. Further, by not displaying images on the other image display devices α, γ, and δ, it is possible to prevent unnecessary images from being provided to viewers of the image display devices α, γ, and δ.

  When the image information is transmitted to each of the image display devices 2 and 2, the control unit 10 of the display control device 1 transmits the information on the image being displayed in the display status table to the image information transmitted to the image display devices 2 and 2. Update to information.

  Hereinafter, a process performed when the control unit 10 of the display control device 1 according to the third embodiment transmits image information to each of the image display devices 2 and 2 will be described. 12 and 13 are flowcharts showing a procedure of processing in which the display control apparatus 1 transmits image information to the image display apparatuses 2 and 2. The following processing is executed by the control unit 10 of the display control apparatus 1 and also by the control unit 20 of the image display apparatuses 2 and 2. In FIG. 12, in the two areas separated by the alternate long and short dash line, the process by the control unit 10 of the display control device 1 is performed on the left area, and the process by the control unit 20 of the image display apparatuses 2 and 2 is performed on the right area. Show.

  In the image display devices 2 and 2 in which the power-on and the startup process are completed, the user selects an image to be viewed from the image information stored in the storage unit 11 of the display control device 1 and displays the image on the image display unit 22. An instruction to display is given through the operation unit 25. The control unit 20 of the image display devices 2 and 2 determines whether a request for any image information stored in the storage unit 11 of the display control device 1 has been received via the operation unit 25 (S51). .

  If it is determined that a request for image information has been received (S51: YES), the control unit 20 requests the display control device 1 for the image information requested by the user (S52). If it is determined that a request for image information has not been received (S51: NO), the control unit 20 proceeds to step S57.

  The control unit 10 of the display control device 1 that has been turned on and has completed the start-up process is waiting for a request for image information from the image display devices 2 and 2, and requests image information from the image display devices 2 and 2. It is determined whether or not it has been done (S53). If it is determined that image information has been requested from any of the image display devices 2 (S53: YES), the control unit 10 reads the requested image information from the storage unit 11 and transmits it to the requested image display device 2. (S54). Further, the control unit 10 updates the information on the image being displayed registered in the display status table in association with the identification information of the destination image display device 2 to the information on the transmitted image information (S55). When it is determined that no image information is requested from any of the image display apparatuses 2 and 2 (S53: NO), the control unit 10 shifts the process to step S60.

  The control unit 20 of the image display devices 2 and 2 displays an image on the image display unit 22 based on the image information received from the display control device 1 (S56). Further, the control unit 20 determines whether or not the display direction of the image display unit 22 has been changed based on the rotation angle detected by the rotation angle sensor 24 (S57). If it is determined that the display direction of the image display unit 22 has not been changed (S57: NO), the control unit 20 returns the process to step S51. Then, the control unit 20 makes a request for any image information stored in the display control device 1 such as a page shift in the image being displayed or a request for new image information via the operation unit 25. It is determined whether it has been accepted (S51).

  When it is determined that the display direction of the image display unit 22 has been changed (S57: YES), the control unit 20 detects the rotation angle by the rotation angle sensor 24 (S58). The control unit 20 transmits the detected rotation angle together with the identification information stored in the storage unit 21 to the display control device 1 (S59). The control unit 10 of the display control device 1 determines whether or not the rotation angle is received from the image display devices 2 and 2 (S60).

  If it is determined that the rotation angle has been received from the image display device 2 (S60: YES), the control unit 10 displays the image of the transmission source that has transmitted the identification information and the rotation angle based on the identification information received together with the rotation angle. The device 2 is specified (S62). The control unit 10 specifies the transmission destination image display device 2 from the display image table 11a shown in FIG. 8 based on the identified identification information of the transmission source image display device 2 and the acquired rotation angle (S63).

  The control unit 10 determines whether or not the default mode is currently set (S64). When it is determined that the default mode is set (S64: YES), the control unit 10 determines the image information to be transmitted to the transmission destination image display device 2 identified in step S63 as the image of the transmission source identified in step S62. The image information is transmitted to the display device 2 (S65). The control unit 10 identifies image information currently being transmitted to the transmission source image display device 2 based on the display status table, and transmits the identified image information to the transmission destination image display device 2. And

  The control unit 10 transmits the changed image information, that is, the image information transmitted to the transmission source image display device 2 to the transmission destination image display device 2 (S54). Further, the control unit 10 transmits information on the image being displayed registered in the display status table in association with the identification information of the image display device 2 (transmission destination image display device 2) that has changed the image to be transmitted. The updated image information is updated (S55), and the processes in and after step S60 are repeated. The control unit 20 of the image display device 2 displays an image on the image display unit 22 based on the image information received from the display control device 1 (S56), and repeats the processing after step S57.

  When it is determined that the default mode is not set (S64: NO), the control unit 10 determines whether or not the dual display mode is currently set (S66). When it is determined that the dual display mode is set (S66: YES), the control unit 10 transmits the image information transmitted to the transmission destination image display device 2 specified in step S63 and the transmission specified in step S62. The image information transmitted to the original image display device 2 is combined. Thereby, the control part 10 produces | generates and changes the image information transmitted to the image display apparatus 2 of the transmission destination specified by step S63 (S67).

  The control unit 10 identifies and combines the image information currently being transmitted to the transmission destination image display device 2 and the image information currently being transmitted to the transmission source image display device 2 based on the display status table. To do. The control unit 10 is obtained by combining the changed image information, that is, the image information currently being transmitted to the transmission destination image display device 2 and the image information currently being transmitted to the transmission source image display device 2. The image information is transmitted to the transmission destination image display device 2 (S54). Further, the control unit 10 transmits information on the image being displayed registered in the display status table in association with the identification information of the image display device 2 (transmission destination image display device 2) that has changed the image to be transmitted. The updated image information is updated (S55), and the processes in and after step S60 are repeated. The control unit 20 of the image display device 2 displays an image on the image display unit 22 based on the image information received from the display control device 1 (S56), and repeats the processing after step S57.

  When it is determined that the dual display mode is not set (S66: NO), that is, when the confidential display mode is set, the control unit 10 transmits image information to be transmitted to all the image display apparatuses 2 and 2. Change (S68). Specifically, the control unit 10 changes the image information transmitted to the transmission destination image display device 2 identified in step S63 to the image information transmitted to the transmission source image display device 2 identified in step S62. To do. In addition, the control unit 10 prevents image information from being transmitted to the image display apparatuses 2 and 2 other than the image display apparatus 2 that is the transmission destination.

  The control unit 10 transmits the changed image information, that is, the image information currently being transmitted to the transmission source image display device 2 to the transmission destination image display device 2, and an image display device other than the transmission destination image display device 2. The transmission of the image information to 2 and 2 is stopped (S54). In addition, the control unit 10 updates the information on the image being displayed registered in the display status table in association with the identification information of the image display device 2 that has changed the image to be transmitted to the information on the transmitted image information ( S55), the process after step S60 is repeated. The information on the image being displayed that is registered in the display status table in association with the identification information of the image display apparatuses 2 and 2 that have stopped transmitting image information is deleted. The control unit 20 of the image display device 2 displays an image on the image display unit 22 based on the image information received from the display control device 1 (S56), and repeats the processing after step S57.

  On the other hand, when it is determined in step S60 that the rotation angle has not been received from the image display device 2 (S60: NO), the control unit 10 performs processing by, for example, operating the operation unit by the user of the display control device 1. It is determined whether termination is instructed (S61). If it is determined that the end of the process is not instructed (S61: NO), the control unit 10 returns the process to step S53, and determines whether image information is requested from the image display devices 2 and 2 (S53). ). The control unit 10 repeats the above-described process until the end of the process is instructed. When it is determined that the end of the process is instructed (S61: YES), the control unit 10 ends the process.

  As described above, in the display control system according to the third embodiment, the users of the image display devices 2 and 2 can each display an arbitrary image. Then, when the display direction of any one of the image display devices 2 is changed in a state where any image is displayed on each of the image display devices 2 and 2, the image display device 2 positioned in the changed display direction is displayed. The image information to be displayed can be changed according to the set display mode. Therefore, the user of the image display devices 2 and 2 displays the image he / she wants to browse on the image display devices 2 and 2, while the image display device 2 being used by the other viewer is using the image display device being used by the other viewer. By turning to the direction 2, desired information can be displayed and provided on the image display device 2 being used by another viewer.

  In the third embodiment described above, the display control device 1 operates as a file server, and the users of the image display devices 2 and 2 select arbitrary image information from the image information stored in the display control device 1. It was displayed on the image display devices 2 and 2. In addition to this configuration, the image display devices 2 and 2 may acquire image information from a file server other than the display control device 1. Specifically, the image display apparatuses 2 and 2 acquire arbitrary image information from an arbitrary file server and display the acquired image information on the image display unit 22 in accordance with an instruction from the user. Then, the display control device 1 specifies a file server that holds the image information in addition to the file name and the page number of the image information as information of the image being displayed on each of the image display devices 2 and 2 in the display status table. It also manages server identification information.

  When the display direction of any of the image display devices 2 is changed, the display control device 1 holds a file server that holds image information to be displayed on the image display device 2 positioned in the changed display direction. Server identification information, file name, and number of pages. Then, the image display device 2 acquires image information corresponding to the notified file name and the number of pages from the file server indicated by the notified server identification information, and causes the image display unit 22 to display the acquired image information. Thereby, not only the image information stored in the display control device 1 but also the image information stored in the server to which the display control device 1 and the image display devices 2 and 2 can be connected via the network are displayed. 2 and 2 can be displayed and browsed. Similarly, the image information stored in the storage unit 21 of the image display devices 2 and 2 may be displayed on the respective image display devices 2 and 2.

(Embodiment 4)
The display control system according to Embodiment 4 will be described below. Since the display control system of the fourth embodiment can be realized by the same configuration as the display control system 100 of the first embodiment described above, description of the configuration is omitted. In the fourth embodiment, a display control system 100 having a configuration including one display control device 1 and one image display device 2 will be described.

  Embodiment 1 mentioned above demonstrated the example applied to the conference system with which the several image display apparatuses 2 and 2 are prepared with respect to several users (presenter and participant). Therefore, for example, when the image display device α is directed in any of the image display devices β, γ, and δ, the image display device α is displayed on any of the image display devices β, γ, and δ that are directed. The image information is appropriately changed. In the fourth embodiment, the image display device 2 is not prepared for a plurality of participants, and each participant participates by directing one image display device 2 used by the presenter toward each participant. Information is provided to the person.

  The display control apparatus 1 according to the fourth embodiment has the same configuration as that shown in FIG. 2, but stores a user position table, a per-user display image table, and the like in the storage unit 11 instead of the display image table 11a. ing. Further, a user information table may be stored in the storage unit 11 instead of the per-user display image table. FIG. 14 is a schematic diagram illustrating the storage contents of a table stored in the storage unit 11 of the display control apparatus 1 according to the fourth embodiment. 14A shows a user position table, FIG. 14B shows a display image table for each user, and FIG. 14C shows a user information table.

  In the user position table (position information table) shown in FIG. 14A, user information for identifying the user is stored in association with the rotation angle of the image display device 2. The user information is information indicating a user who is positioned in the display direction of the image display unit 22 when the image display device 2 is rotated at each rotation angle. That is, for example, when the image display device 2 is rotated by 135 °, the participant B is positioned in the display direction of the image display device 2.

  In the display image table for each user (image storage unit) shown in FIG. 14B, display image information for specifying an image to be provided to each user is stored in association with the user information. The display image information indicates image information to be transmitted to the image display device 2 when the display direction of the image display device 2 is the user direction identified by the corresponding user information. Note that a user information table shown in FIG. 14C may be stored in the storage unit 11 instead of the per-user display image table shown in FIG.

  In the user information table (browser table) shown in FIG. 14 (c), a confidential level set in advance for each user is stored in association with the user information. In FIG. 14C, “high”, “medium”, and “low” are stored as the security level, which corresponds to the security level set in the image information that can be provided to each user. That is, when the display direction of the image display device 2 is the direction of any user, confidential image information corresponding to this user is transmitted to the image display device 2. When a user information table is used, image information in which each confidentiality is set is stored in the storage unit 11 separately from the user information table in association with each confidential level.

  Hereinafter, when the display control system 100 according to the fourth embodiment is applied to a conference system used for a conference held by one presenter and a plurality of participants, the display control device 1 and the image display device 2 are used. Will be described. The control unit 20 of the image display device 2 that has completed the startup process notifies the display control device 1 of the rotation angle detected by the rotation angle sensor 24. Since the rotation angle of the image display device 2 is based on the orientation of the image display unit 22 at the time of activation, the rotation angle at this time is 0 °. On the other hand, the control unit 10 of the display control device 1 that has completed the activation process selects image information to be transmitted to the image display device 2 based on the rotation angle acquired from the image display device 2.

  Specifically, when the control unit (viewer detection unit) 10 acquires a rotation angle (here, 0 °) from the image display device 2, user information (here, presenter i) corresponding to the acquired rotation angle. Are read from the user position table. Next, the control unit 10 reads display image information corresponding to the read user information from the display image table for each user. Then, the control unit 10 transmits the display image information read from the display image table for each user to the image display device 2. The display control device 1 does not select image information based on the rotation angle (display direction) of the image display device 2 immediately after the image display device 2 is activated, but displays image information registered in advance. You may make it transmit to the apparatus 2. FIG.

  As described above, the image information transmitted by the display control device 1 is acquired by the image display device 2 and displayed on the image display unit 22, thereby displaying an image registered in advance on the image display device 2. it can. The control unit 20 of the image display device 2 acquires the image information transmitted from the display control device 1 and causes the image display unit 22 to display the image information, and based on the rotation angle detected by the rotation angle sensor 24, the image display unit. It is determined whether or not the display direction 22 has been changed. When the control unit 20 detects that the display direction of the image display unit 22 has been changed, the control unit 20 notifies the display control device 1 of the rotation angle detected by the rotation angle sensor 24.

  When the control unit 10 of the display control device 1 that has started transmission of image information to the image display device 2 acquires the rotation angle from the image display device 2, the control unit 10 performs the same processing as described above based on the acquired rotation angle. The image information to be transmitted to the image display device 2 is selected. Specifically, the control unit 10 reads the user information corresponding to the rotation angle acquired from the image display device 2 from the user position table, and displays the display image information corresponding to the read user information from the display image table for each user. read out. Then, the control unit 10 transmits the display image information read from the display image table for each user to the image display device 2. Thereby, when the display direction of the image display device 2 is changed, an image registered in advance according to the changed display direction can be displayed on the image display device 2.

  When a user information table is used instead of the display image table for each user, the control unit 10 of the display control device 1 reads out the user information corresponding to the rotation angle acquired from the image display device 2 from the user position table. The confidential level corresponding to the user information is read from the user information table. Then, the control unit 10 reads the image information set with the confidential level read from the user information table from the storage unit 11 and transmits the image information to the image display device 2. When the user information table is used in this way, it is possible to provide highly confidential information to a user who has a high security level.

  FIG. 15 is a schematic diagram for explaining image information displayed on the image display device 2. Each of FIGS. 15A to 15D shows a situation in which the presenter I and the participants B, C, and D surround and use one image display device 2 in the upward direction. The figure seen from is shown. In the initial state, as shown in FIG. 15A, the display direction of the image display device 2 is the right direction, and the rotation angle of the image display device 2 at this time is 0 °.

  In FIG. 15, when only the presenter i of the conference uses the image display device 2 and wants to show an image to any of the three participants, the image display unit 22 of the image display device 2 is displayed to the participant. Turn. Therefore, in FIG. 15, image information displayed on the image display device 2 when the display direction of the image display device 2 is changed will be described.

  As shown in the user position table of FIG. 14A and the per-user display image table of FIG. 14B, when the rotation angle of the image display device 2 is 0 °, the display direction of the image display device 2 is the presenter icon. The display image information at this time is image1. Accordingly, as shown in FIG. 15A, in the initial state, the image 1 is displayed on the image display device 2. When the display direction of the image display device 2 is changed from the state shown in FIG. 15A to the participant B as shown in FIG. 15B, the control unit 20 uses the rotation angle sensor 24. A rotation angle of 135 ° is detected. The control unit 20 notifies the display control device 1 of the detected 135 °, and the control unit 10 of the display control device 1 acquires a rotation angle of 135 ° from the image display device 2.

  The control unit 10 of the display control device 1 reads information indicating the participant B as user information corresponding to the acquired rotation angle 135 ° from the user position table. The control unit 10 reads image2 from the display image table for each user as display image information corresponding to the information indicating the participant b. The control unit 10 transmits the image information of image2 to the image display device 2. Thereby, when the state shown in FIG. 15A is changed to the state shown in FIG. 15B, the image information displayed on the image display device 2 is changed from the image 1 to the image 2. . Accordingly, the presenter A directs the image display device 2 toward the participant B, thereby causing the image display device 2 to display an image to be provided to the participant B. Therefore, an image necessary only for the participant B can be provided without being seen by the participants C and D.

  Similarly, when the display direction of the image display device 2 is changed to the participant C as shown in FIG. 15C, the control unit 10 of the display control device 1 displays the image information of image3 as an image. Transmit to device 2. Therefore, when the state shown in FIG. 15A is changed to the state shown in FIG. 15C, the image information displayed on the image display device 2 is changed from the image 1 image to the image 3 image. When the display direction of the image display device 2 is changed to the participant D as shown in FIG. 15D, the control unit 10 of the display control device 1 converts the image information of image4 into the image display device 2. Transmit to. Accordingly, when the state shown in FIG. 15A is changed to the state shown in FIG. 15D, the image information displayed on the image display device 2 is changed from the image 1 image to the image 4 image.

  Below, the process performed when the control part 10 of the display control apparatus 1 transmits image information to the image display apparatus 2 is demonstrated. FIG. 16 is a flowchart illustrating a procedure of processing in which the display control device 1 transmits image information to the image display device 2. Note that the following processing is executed by the control unit 10 of the display control device 1 and also by the control unit 20 of the image display device 2. Further, in FIG. 16, in the two regions separated by the one-dot chain line, the processing by the control unit 10 of the display control device 1 is shown in the left region, and the processing by the control unit 20 of the image display device 2 is shown in the right region. Yes.

  The control unit 20 of the image display device 2 that has been powered on and completed the startup process detects the rotation angle by the rotation angle sensor 24 (S41), and transmits the detected rotation angle to the display control device 1 (S42). On the other hand, the control unit 10 of the display control apparatus 1 that has been turned on and has completed the startup process is in a waiting state for receiving the rotation angle transmitted from the image display apparatus 2, and determines the rotation angle from the image display apparatus 2. It is determined whether or not it has been received (S43).

  When it is determined that the rotation angle has been received (S43: YES), the control unit 10 specifies a user corresponding to the received rotation angle based on the user position table (S44). Based on the identified user, the control unit 10 identifies image information to be transmitted to the image display device 2 from the display image table for each user (S45). The control unit 10 transmits the specified image information to the image display device 2 (S46). The display control device 1 does not select image information to be transmitted to the image display device 2 based on the rotation angle of the image display device 2 as described above immediately after the image display device 2 is started. The registered image information may be transmitted to the image display device 2.

  The control unit 10 of the display control device 1 that has started transmission of image information to the image display device 2 determines, for example, whether the end of the process has been instructed by the user of the display control device 1 operating the operation unit. (S47). When determining that the end of the process is not instructed (S47: NO), the control unit 10 returns the process to step S43, and determines whether or not the rotation angle is received from the image display device 2 (S43).

  On the other hand, the control unit 20 of the image display device 2 that has received the image information from the display control device 1 causes the image display unit 22 to display an image based on the received image information (S48). Further, the control unit 20 determines whether or not the display direction of the image display unit 22 has been changed based on the rotation angle detected by the rotation angle sensor 24 (S49). If it is determined that the display direction of the image display unit 22 has not been changed (S49: NO), the control unit 20 returns the process to step S48, and sequentially receives the image information transmitted from the display control device 1. The image is displayed on the image display unit 22.

  When it is determined that the display direction of the image display unit 22 has been changed (S49: YES), the control unit 20 of the image display device 2 returns the process to step S41, and detects the rotation angle by the rotation angle sensor 24 (S41). The detected rotation angle is transmitted to the display control device 1 (S42). When receiving the rotation angle transmitted from the image display device 2 (S43: YES), the control unit 10 of the display control device 1 repeats the subsequent steps S44 to S47. Thereby, whenever the display direction of the image display apparatus 2 is changed, the image displayed on the image display apparatus 2 can be changed according to the changed display direction.

  On the other hand, when the control unit 10 of the display control device 1 determines that the rotation angle transmitted from the image display device 2 has not been received (S43: NO), the process proceeds to step S46. And the control part 10 continues the transmission to the image display apparatus 2 of the image information already specified by step S45 (S46). The control unit 10 repeats the above-described process until the end of the process is instructed. When it is determined that the end of the process is instructed (S47: YES), the control unit 10 ends the process.

  As described above, the image display device 2 that displays an image based on the image information transmitted from the display control device 1 displays the changed display direction when the display direction is changed. Notify Then, the display control device 1 changes the image information to be transmitted to the image display device 2 in accordance with the display direction (rotation angle) notified from the image display device 2. Therefore, when the presenter (i) changes the display direction of the image display device (2), useful information for each participant can be displayed on the image display device (2) and provided.

  In the fourth embodiment described above, the control unit 20 of the image display device 2 detects the rotation angles of 0 °, 135 °, 180 °, and 225 ° as the display direction of the image display unit 22 by the rotation angle sensor 24. explained. However, the image display unit 22 is not necessarily rotated in the directions of 0 °, 135 °, 180 °, and 225 °. Therefore, the rotation angle acquired by the display control device 1 from the image display device 2 may not match the rotation angle stored in the user position table. In this case, the control unit 10 may process the rotation angle closest to the rotation angle acquired from the image display device 2 among the rotation angles stored in the user position table as the display direction of the image display device 2. .

  In the user position table of the fourth embodiment described above, user information for identifying an individual as a user existing in the display direction (rotation angle) of the image display device 2 is registered. However, for example, information specifying a department such as the engineering department and the accounting department may be registered in the user position table, and display image information for each department may be registered in the display image table for each user. In this case, the image display device is not specified according to the user's department existing in the display direction (rotation angle) of the image display device 2, but the individual user existing in the display direction (rotation angle) of the image display device 2 is not specified. 2 can be controlled.

  When the display direction of the image display device 2 is changed, the display control device 1 according to the fourth embodiment described above changes from the user position table shown in FIG. 14A based on the rotation angle of the image display device 2. It is the structure which specifies the user who exists in the displayed direction. In addition, for example, each user carries an IC card or the like on which information for identifying the user is recorded, and the image display device 2 has a reading function capable of reading the IC card in a non-contact manner. deep. When the image display unit 22 of the image display device 2 is directed toward each user, the image display device 2 reads information from the IC card of each user, so that the user existing in the display direction of the image display device 2 May be specified.

  The display control device 1 according to the fourth embodiment described above is configured to identify the user existing in the display direction of the image display device 2 based on the user position table. However, for example, in the case of the display control system 100 including a plurality of image display devices 2 and 2, as shown in the display image table 11a of FIG. The identification information of the image display devices 2 and 2 to be registered is registered. In addition, a user who uses the image display devices 2 and 2 is registered in association with each of the image display devices 2 and 2. Then, when the display direction of the image display device 2 is changed, the image display device 2 existing in the display direction of the image display device 2 is first identified. Then, by specifying the user to whom the specified image display device 2 is assigned, the user existing in the display direction of the image display device 2 may be specified.

  In the first to third embodiments, the form in which the display control system of the present application is applied to the conference system has been described. However, the present invention is not limited to this form. For example, in an apparatus for displaying an advertisement such as an information display, the present invention can be applied to a system for controlling an image to be displayed according to a rotation angle. Further, as the display control device 1 and the image display devices 2 and 2, mobile terminal devices such as mobile phones and mobile terminals, general personal computers, and the like may be used.

  The preferred embodiments of the present invention have been specifically described above. However, each configuration, operation, and the like can be changed as appropriate, and are not limited to the above-described embodiments.

DESCRIPTION OF SYMBOLS 1 Display control apparatus 10 Control part 2 Image display apparatus 20 Control part 22 Image display part 24 Rotation angle sensor 26 Communication interface

Claims (13)

In a display control device that can be connected to one or a plurality of image display devices and transmits and displays image information to be displayed on each of the connected image display devices,
A direction acquisition unit that acquires information indicating each display direction of the image display device;
An image specifying unit for specifying image information to be displayed on the image display device based on the information acquired by the direction acquisition unit;
A display control device comprising: a transmission unit that transmits image information specified by the image specifying unit to the image display device. A viewer detection unit for detecting a viewer located in the display direction of the image display device indicated by the information acquired by the direction acquisition unit;
The display control apparatus according to claim 1, wherein the image specifying unit is configured to specify image information corresponding to a viewer detected by the viewer detecting unit. An image storage unit that stores image information in association with each of one or more viewers;
3. The image specifying unit is configured to specify image information corresponding to a viewer detected by the viewer detecting unit from image information stored in the image storage unit. Display controller. A position information table for storing each of the display directions of the image display device and viewer information indicating a viewer located in each display direction in association with each other;
3. The browser according to claim 2, wherein the viewer detection unit specifies a viewer corresponding to the display direction of the image display device indicated by the information acquired by the direction acquisition unit from the position information table. 4. The display control device according to 3. A device detection unit for detecting another image display device located in the display direction of the image display device indicated by the information acquired by the direction acquisition unit;
The display control device according to claim 2, wherein the viewer detection unit detects a viewer associated in advance with the image display device detected by the device detection unit. A viewer table for storing the viewer information for identifying a plurality of viewers, and the confidential level set in advance for each of the viewers;
A security level acquisition unit that acquires the security level of the reader detected by the viewer detection unit from the viewer table;
The display control apparatus according to claim 2, wherein the image specifying unit specifies image information corresponding to a security level acquired by the security level acquisition unit.   The transmission unit transmits the image information specified by the image specifying unit to an image display device whose display direction is indicated by the information acquired by the direction acquisition unit. The display control device according to any one of the above.   The transmission unit is configured to transmit the image information specified by the image specifying unit to an image display device positioned in a display direction indicated by the information acquired by the direction acquisition unit. The display control apparatus according to any one of 6 to 6.   9. The transmission unit according to claim 8, wherein the transmission unit transmits image information specified by the image specifying unit and image information based on a display direction of an image display device positioned in the display direction. Display controller.   9. The transmission unit according to claim 8, wherein the transmission unit is configured not to transmit image information to an image display device other than the image display device located in a display direction indicated by the information acquired by the direction acquisition unit. 9. The display control device according to 9. One or more image display devices;
A display control device according to any one of claims 1 to 10,
The image display device includes:
A display for displaying an image;
A detection unit for detecting a display direction of the display unit;
An output unit that outputs information indicating the display direction detected by the detection unit to the display control device;
The display control system, wherein the direction acquisition unit of the display control device acquires information output by the output unit of the image display device.   The display control system according to claim 11, wherein the detection unit detects a rotation angle of the display unit with a vertical direction as a rotation axis as a display direction of the display unit. In a computer program for causing a computer to transmit and display image information to be displayed on each of one or a plurality of image display devices,
In the computer,
A direction acquisition step of acquiring information indicating each display direction of the image display device;
An image specifying step for specifying image information to be displayed on the image display device based on the information acquired in the direction acquiring step;
And a transmission step of transmitting the image information identified in the image identification step to the image display device.

Images