JP6973583B2 - Electronic blackboard device and image display method - Google Patents

Description

The present invention relates to an electronic blackboard instrumentation置及beauty image display method.

An electronic blackboard device that can convert characters and figures drawn on a board surface into digital data and save them is known. Some such electronic blackboard devices have a communication function and transmit and store data to other information processing devices. When transmitting data to the storage destination in this way, it is necessary to set information regarding the connection regarding the data storage destination in advance in the electronic blackboard device.

In order to send data to other information processing devices using a wireless line, the electronic blackboard pre-authenticates the information processing device at the destination in order to prevent the electronic blackboard device from sending data to an unintended and unauthorized destination. It is necessary to execute the authentication process. In the authentication process used in such a case, the combination of the connection ID and the password is generally held on the electronic blackboard device side as a part of the information related to the connection, and this information is stored on the information processing device side. There is known a method of inputting the correct combination of.

If the authentication information held in the electronic blackboard device is fixed so that the information processing device once connected can omit the authentication operation at the next connection, the once set authentication information will be reused many times. Not desirable from a security standpoint. From the viewpoint of ensuring security, it is desirable that the authentication information used in the authentication process executed when data is transmitted from the electronic blackboard device is ad hoc. From this point of view, as an authentication technology in the electronic blackboard device, the password used for connection authentication is displayed on the electronic blackboard based on the request from the information processing device of the data transmission destination, and the data transmission destination is determined by the displayed password. A technique for authenticating is disclosed (see, for example, Patent Document 1).

When the technique disclosed in Patent Document 1 is used, it is necessary to perform a password request operation for the electronic blackboard device and a password input operation for the information processing device at the data transmission destination each time. As described above, it is not preferable from the viewpoint of usability that the password request operation and the input operation are required every time the data is saved. On the other hand, as described above, in the data transmission to the information processing device once connected, it is not preferable from the viewpoint of information security if the subsequent authentication process is omitted.

An object of the present invention is to provide an electronic blackboard device capable of easily transmitting data to a legitimate destination while ensuring information security.

In order to solve the above problems, one aspect of the present invention is an electronic blackboard device for displaying a written image based on a designated position on a display surface, a sensor for detecting a mobile terminal and a mobile terminal detected by the sensor. A communication antenna for wireless communication with the electronic blackboard device, and an image transfer unit for transferring the written image to the mobile terminal detected by the sensor by the wireless communication via the communication antenna. It is characterized by.

According to the present invention, it is possible to easily transmit data to a legitimate destination while ensuring information security.

It is explanatory drawing which shows the whole structure of the electronic blackboard system which concerns on embodiment of this invention. It is a figure which shows the structure of the terminal installation part provided in the electronic blackboard apparatus which concerns on this embodiment. It is a block diagram which shows the hardware composition of the electronic blackboard apparatus which concerns on this embodiment. It is a block diagram which shows the hardware composition of the mobile terminal which concerns on this embodiment. It is a block diagram which shows the functional structure of the electronic blackboard apparatus which concerns on this embodiment. It is a block diagram which shows the functional structure of the mobile terminal which concerns on this embodiment. It is a flowchart which shows the flow of processing in the electronic blackboard program which concerns on embodiment of this invention. This is an example of image display on the electronic blackboard according to the present embodiment. This is another example of image display on the electronic blackboard according to the present embodiment. It is still another example of the image display on the electronic blackboard which concerns on this embodiment. It is still another example of the image display on the electronic blackboard which concerns on this embodiment. It is still another example of the image display on the electronic blackboard which concerns on this embodiment. It is still another example of the image display on the electronic blackboard which concerns on this embodiment.

<Summary of this embodiment>
In its embodiment, the electronic blackboard device according to the present invention is placed at a position that meets a predetermined condition without registering authentication information including an ID and a password in advance or inputting it each time data is transmitted. One of the gist is to transfer data only to the information processing device. The electronic blackboard device described below can easily and safely execute data transfer without performing an authentication operation such as password authentication with an information processing device that receives data from the electronic blackboard device.

Electronic blackboard devices are often used in companies at meetings, etc., and an information security function that prevents the leakage of characters and figures drawn on the board to the outside is essential. On top of that, from the viewpoint of improving the efficiency of the meeting, it is also required to improve the usability so that the operation related to the storage of the information drawn by the electronic blackboard device can be easily performed. With the conventional technology, it is difficult to improve both the information security of the electronic blackboard device and the usability that contradicts the improvement. However, according to the electronic blackboard device according to the present embodiment, the information security is ensured and the usability is improved. Both improvements can be achieved.

<Embodiment of Electronic Blackboard System 300>
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the electronic blackboard system 300 according to the present embodiment is configured by combining an electronic blackboard 100 and a mobile terminal 200. The electronic blackboard 100 is an embodiment of an electronic blackboard device including an electronic blackboard surface which is a display surface for displaying the loci of characters and figures drawn by using a dedicated or general-purpose writing instrument as visual information. Further, the portable terminal 200 is an embodiment of an external device that stores image data in which visual information is generated from a locus drawn on the electronic blackboard 100 as a “written image”.

[Structure of electronic blackboard 100]
The electronic blackboard 100 is a control device 110 that controls the entire operation, and an electronic blackboard surface that is an information display surface, and is a touch display that displays characters and pictures that are visual information from a locus of a designated position traced by a writing instrument. It includes 120 and a plurality of terminal installation devices 130 for installing a mobile terminal 200 as a transfer destination of a written image based on drawn characters and figures.

The electronic blackboard 100 according to the embodiment of the present invention generates a "written image" which is visual information generated from a locus of a designated position by a writing tool and is converted into data in a predetermined format to be transferred to the mobile terminal 200. The electronic blackboard 100 generates a written image in response to a predetermined data transmission operation on the display surface. Further, the electronic blackboard 100 specifies an installation position of the mobile terminal 200 to which the written image is transferred with respect to the electronic blackboard 100 based on a predetermined data transmission operation, and visual information capable of identifying the specified position. Is displayed on the touch display 120. When the electronic blackboard 100 detects the installation of the mobile terminal 200 in the terminal installation device 130 corresponding to the installation information corresponding to the position indicated in the visual information, the electronic blackboard 100 transfers the written image to the mobile terminal 200. ..

That is, the electronic blackboard 100 displays installation information indicating the installation position of the mobile terminal 200 to the touch display 120 in response to the transmission operation for transmitting the written image to the mobile terminal 200. After that, the written image is transmitted only to the mobile terminal 200 installed in the terminal installation device 130 corresponding to the installation information. By executing such an operation, the electronic blackboard 100 does not perform the authentication process in the stage before transmitting the data to the mobile terminal 200, and the information input operation (password input, etc.) by the user required for the authentication process is performed. ) Can be limited to the mobile terminal 200 to which the data is transferred.

[Overview of mobile terminal 200]
The mobile terminal 200 is, for example, a terminal having an information processing function, and has a size capable of simultaneously installing a plurality of the mobile terminal 200 with respect to the terminal installation device 130.

[Overview of terminal installation device 130]
FIG. 2 is a diagram showing a schematic configuration of the terminal installation device 130. As shown in FIG. 2, a plurality of terminal installation devices 130 are provided in the electronic blackboard 100. The terminal installation device 130 includes a portion where the mobile terminal 200 can be installed, and the installation sensor 131 for detecting the installation of the mobile terminal 200, the installed mobile terminal 200, and the electronic blackboard 100 at the portion. A communication antenna 132 for performing wireless communication with and is used as a set. One terminal installation device 130 includes at least one installation sensor 131 and one communication antenna 132 pair.

The installation sensor 131 is a sensor that detects whether or not the mobile terminal 200 is present at a position corresponding to the “terminal installation position display” described later. The installation sensor 131 detects that the mobile terminal 200 is installed at the position from the installation pressure of the mobile terminal 200, or detects that the mobile terminal 200 is placed at the position based on image recognition. It may be a camera that does.

The communication antenna 132 is a communication means that wirelessly connects only to the mobile terminal 200 placed at a position corresponding to the terminal installation position display. The directivity of the radio wave in the communication antenna 132 is adjusted together with the output level so that the radio wave reaches only the mobile terminal 200 placed at the above position. By detecting that the mobile terminal 200 has normally received the radio wave emitted from the communication antenna 132, only the communication antenna 132 may be used instead of the installation sensor 131.

The installation sensor 131 and the communication antenna 132 have a one-to-one relationship. Therefore, the wireless connection to the mobile terminal 200 installed at a position where radio waves can be received by one installed sensor 131 is configured to be established only with the communication antenna 132 corresponding to the installed sensor 131.

In other words, the wireless connection to the mobile terminal 200 detected by one installed sensor 131 is adjusted so as not to be made from another communication antenna 132 corresponding to another installed sensor 131 different from the one installed sensor 131. ing. That is, the radio wave reachable range of the communication antenna 132 is adjusted so as to be limited to the upper part of the corresponding installation sensor 131.

[Hardware configuration of electronic blackboard 100]
Next, the hardware configuration of the electronic blackboard 100 according to the present embodiment will be described. The operation of the electronic blackboard 100 is controlled by the control device 110. Therefore, in explaining the embodiment of the electronic blackboard device according to the present invention in detail, the hardware configuration of the control device 110 will be described in detail. As shown in FIG. 3, the control device 110 according to the present embodiment includes a CPU (Central Processing Unit) 111, a ROM (Read Only Memory) 112, a RAM (Random Access Memory) 113, and a written detection I / F (InterFace) 114. , Image output I / F 115, audio speaker 116, installation sensor I / F 117, wireless module 118 and antenna changeover switch 119 are connected via the internal bus 150.

Further, a touch display 120, which is a writing sensing display including an information display surface, is connected to the writing detection I / F 114 and the image output I / F 115. A plurality of installation sensors 131 are connected to the installation sensors 1 / F117, respectively. A plurality of communication antennas 132 are connected to the antenna changeover switch 119.

The CPU 111 is a calculation means, and executes a calculation process for controlling the operation of the entire electronic blackboard 100. The ROM 112 is a read-only non-volatile storage medium, and stores firmware used for operating control of the electronic blackboard 100 and a program code that can be processed by a computer such as an electronic blackboard program described later. The RAM 113 is a volatile storage medium capable of high-speed reading and writing of data, and is used as a work area in data processing executed by the CPU 111 based on a program stored in the ROM 112.

The writing detection I / F 114 detects a position indicated by the writing instrument with respect to the display surface of the touch display 120 and transfers it to the CPU 111. The image output I / F 115 outputs the visual information generated by the CPU 111 from the locus of the indicated position detected by the writing detection I / F 114 to the touch display 120.

The audio speaker 116 is a sound output means for outputting an operation sound for urging a user who is using the electronic blackboard 100 to operate, an alarm sound for an unauthorized operation, and the like.

The installation sensor I / F 117 detects an installation signal indicating the installation status of the mobile terminal 200 detected by the installation sensor 131 constituting the device detection unit and transfers it to the CPU 111.

The wireless module 118 establishes a wireless communication line with the mobile terminal 200 via the communication antenna 132, and performs transmission processing for transmitting the written image to the mobile terminal 200.

The antenna changeover switch 119 constitutes a detection position specifying unit, and is a communication destination switching means for switching the connection state between the wireless module 118 and the plurality of communication antennas 132. The switching operation of the antenna changeover switch 119 depends on the operation control of the CPU 111. The antenna changeover switch 119 can operate a specific communication antenna 132 for establishing a wireless line with the mobile terminal 200 installed at a predetermined position.

In the control device 110 of the electronic blackboard 100 according to the present embodiment, the software control unit 10 is configured by the CPU 111 performing calculations according to the program stored in the ROM 112 in the hardware configuration described above. The combination of the software control unit 10 configured in this way and the hardware resources constitutes a functional block that realizes the function of the control device 110 included in the electronic blackboard 100 according to the present embodiment.

[Hardware configuration of mobile terminal 200]
Next, the hardware configuration of the mobile terminal 200 will be described with reference to FIG. As shown in FIG. 4, the mobile terminal 200 is a kind of information processing device, includes a configuration similar to a general PC (Personal Computer) having a communication function, and has a hardware resource in a portable housing. To prepare for. That is, in the mobile terminal 200 according to the present embodiment, the CPU 201, ROM 202, RAM 203, flash memory 204, and I / F 205 are connected via the internal bus 209. Further, the antenna 208 and the display operation unit 206 are connected to the I / F 205 via the wireless module 207.

The CPU 201 is a calculation means and controls the operation of the entire mobile terminal 200. The RAM 203 is a volatile storage medium capable of high-speed reading and writing of data, and is used as a work area when the CPU 201 processes the data. The ROM 202 is a read-only non-volatile storage medium, and stores programs such as firmware. The flash memory 204 is a non-volatile storage medium capable of reading and writing data, and stores an OS (Operating System), various control programs, application programs, and the like.

The I / F 205 connects the internal bus 209 to the display operation unit 206 and the wireless module 207. The display operation unit 206 is a touch interface for the user to operate the mobile terminal 200, and is a visual user interface for displaying the result of performing various information processing according to the user's operation. The wireless module 207 is a data communication means for transmitting / receiving data to / from the electronic blackboard 100 via a wireless line. Radio waves are radiated from the antenna 208 connected to the wireless module 207 to establish a communication connection with the communication antenna 132 included in the electronic blackboard 100.

In the hardware configuration of the mobile terminal 200 described above, the software control unit 20 is configured by the CPU 201 performing an operation according to a program stored in the ROM 202 or a program loaded in the flash memory 204. The combination of the software control unit 20 configured in this way and the hardware resources constitutes a functional block that realizes the functions of the mobile terminal 200 according to the present embodiment.

[Functional configuration of electronic blackboard 100]
Next, the functional configuration of the electronic blackboard 100 according to the present embodiment will be described with reference to FIG. As shown in FIG. 5, the software control unit 10 of the electronic blackboard 100 includes a writing detection unit 11, an image output unit 12, a detection position specifying unit 13, a device detection unit 14, a transfer image generation unit 15, and the transfer image generation unit 15. It includes an image transfer unit 16 and a transfer result determination unit 17.

The writing detection unit 11 uses a writing instrument on the display surface of the touch display 120 to display visual information generated from a locus based on a designated position representing characters and figures drawn by the user as characters and figures on the touch display 120. , Output as a written image. Further, the writing detection unit 11 detects an operation for instructing a specific process for the electronic blackboard 100, such as an operation for saving image data. The writing detection unit 11 is realized by processing the CPU 111, the writing detection I / F 114, the image output I / F 115, and the electronic blackboard control program stored in the ROM 112.

Here, the writing signal is a signal indicating trajectory information and position information traced by a writing instrument or a finger on the touch display 120. The image data generated based on the writing signal is referred to as a display image 121. That is, the writing detection unit 11 generates image data based on the writing signal and notifies the image output unit 12.

The image output unit 12 outputs the display image generated by the writing detection unit 11 to the touch display 120. Further, when the image output unit 12 executes the transfer process of the display image 121 to the mobile terminal 200, the image output unit 12 displays a transfer destination indicating a specific position of the terminal installation device 130 specified by the detection position specifying unit 13 described later. Output to the touch display 120. The image output unit 12 is realized by processing the CPU 111, the writing detection I / F 114, the image output I / F 115, and the electronic blackboard control program stored in the ROM 112.

The detection position specifying unit 13 is a specific operation detected by the writing detection unit 11, and is a terminal installation device 130 for installing the mobile terminal 200 based on a saving operation which is an operation indicating a writing image transfer command. Identify the physical location. The detection position specifying unit 13 notifies the image output unit 12 of the position of the specified terminal installation device 130. Further, the detection position specifying unit 13 notifies the antenna changeover switch 119 of a changeover command so as to operate the communication antenna 132 corresponding to the specified terminal installation device 130. The writing detection unit 11 is realized by processing the CPU 111, the installation sensor 1 / F117, the wireless module 118, the antenna changeover switch 119, the communication antenna 132, and the electronic blackboard control program stored in the ROM 112.

The installation position of the mobile terminal 200 in the detection position specifying unit 13 may be specified according to the distance from the detected display surface at the designated position of the writing instrument immediately before the storage operation is performed. For example, the terminal installation device 130 may be specified as the terminal installation device 130 closest to the indicated position immediately before the storage operation is performed. As a result, the terminal installation device 130 near the position immediately before the user performs the operation for saving the written image can be specified and used.

Further, it may be performed according to the distance from the area on the display surface where the number of detected positions of the writing instrument is large before the saving operation is performed. For example, the terminal installation device 130 may specify the terminal installation device 130 at the position farthest from the area of the display surface where the amount of the indicated position detected before the operation of the save operation is the largest. As a result, the visual information displayed on the display surface and the installation position display 122, which will be described later, are displayed with less overlap, and the user can easily see the specified terminal installation device 130.

The device detection unit 14 monitors whether or not the installation sensor 131 corresponding to the position specified by the detection position specifying unit 13 detects the mobile terminal 200. When the mobile terminal 200 is detected, the device detection unit 14 notifies the transfer image generation unit 15 and the image transfer unit 16 of a signal indicating to that effect. The device detection unit 14 is realized by processing the CPU 111, the installation sensor I / F117, the installation sensor 131, and the electronic blackboard control program stored in the ROM 112.

The transfer image generation unit 15 receives data related to the display image 121 from the image output unit 12 in response to the "save operation" detected by the writing detection unit 11, and after the mobile terminal 200 is detected by the device detection unit 14. , Generates a written image that is the data to be transferred. Here, without waiting for the notification from the device detection unit 14, a writing image may be generated for the trigger only for the detection of the saving operation in the writing detection unit 11, and the generated writing image may be temporarily stored in the RAM 203. The image generation unit 15 for transfer is realized by processing the CPU 111, the writing detection I / F 114, the touch display 120, the installation sensor I / F 117, the installation sensor 131, and the electronic blackboard control program stored in the ROM 112. NS.

The image transfer unit 16 transfers the written image generated by the transfer image generation unit 15 to the mobile terminal 200 detected by the device detection unit 14. The image transfer unit 16 does not execute a specific authentication process in the transfer of the written image to the mobile terminal 200. The image transfer unit 16 transfers the written image only via the communication antenna 132 corresponding to the installation position specified by the device detection unit 14.

The image transfer unit 16 is realized by processing the CPU 111, the wireless module 118, the antenna changeover switch 119, the communication antenna 132, and the electronic blackboard control program stored in the ROM 112.

The transfer result determination unit 17 monitors that the written image is normally transferred by the image transfer unit 16. The transfer result determination unit 17 monitors the processing time from the start to the end of the transfer process in the image transfer unit 16 to monitor that the transfer process does not time out and that the transfer process does not end in the middle. Then, the result is displayed on the image output unit 12. The transfer result determination unit 17 is realized by processing the CPU 111, the wireless module 118, the image output I / F 115, the touch display 120, and the electronic blackboard control program stored in the ROM 112.

[Functional configuration of mobile terminal 200]
Next, the functional configuration of the mobile terminal 200 will be described with reference to FIG. As shown in FIG. 6, the software control unit 20 of the mobile terminal 200 includes an image receiving unit 21, a reception result reply unit 22, and an image storage unit 23.

The image receiving unit 21 receives the written image sent from the image transfer unit 16 included in the electronic blackboard 100. The image receiving unit 21 stores the received written image via the image storage unit 23. The image receiving unit 21 notifies the reception result reply unit 22 of the reception result of the written image. The image receiving unit 21 is realized by processing the CPU 201, the wireless module 207, the antenna 208, and the control program stored in the ROM 202.

The reception result reply unit 22 receives a notification indicating that the writing image has been normally received by the image reception unit 21, and returns a notification indicating that the transfer is completed to the electronic blackboard 100. The reception result reply unit 22 is realized by processing the CPU 201, the wireless module 207, the antenna 208, and the control program stored in the ROM 202.

The image storage unit 23 stores the written image received by the image reception unit 21 in the flash memory 204. The image storage unit 23 is realized by processing the CPU 201, the flash memory 204, and the control program stored in the ROM 202.

[Outline of processing in the electronic blackboard device]
Next, the flow of processing by the electronic blackboard control program operating in the electronic blackboard device according to the present invention will be described. First, the data transfer operation that is the premise of the processing will be described.

<< Example of data transfer operation >>
FIG. 8 is a diagram illustrating a state in which the electronic blackboard 100 is used. As shown in FIG. 8, when a locus is drawn on the touch display 120 constituting the display surface of the electronic blackboard 100, characters and figures as visual information are displayed on the touch display 120 as a display image 121. Further, on the touch display 120, an operation button 124 instructing a "save operation" for saving the display image 121 as a written image is displayed in a part of the display area of the touch display 120. When a specific operation (for example, tapping with a writing tool) is performed on the operation button 124, the installation position display 122 that clearly indicates the installation position of the mobile terminal 200 is displayed.

As shown in FIG. 8, the installation position display 122 is displayed by the number corresponding to the number of installed installation sensors 131, and a message 123 indicating the installation position is displayed in the frame of the installation position display 122. You may. In this case, the user near the electronic blackboard 100 may install the mobile terminal 200 at the position guided by the installation position display 122 if he / she wants to transfer the data related to the display image 121. That is, data transfer can be easily performed.

The display position of the operation button 124 is not limited to the example of FIG. It may be displayed at a preset position. For example, the operation button 124 may be displayed in an area where the display image 121 is not displayed.

Further, as shown in FIG. 11, in the area in the vicinity where the display image 121 is displayed, the operation button 124 is displayed, and the installation position display 122 with respect to the installation position corresponding to the vicinity where the operation button 124 is displayed. May be displayed. In this case, if the mobile terminal 200 is installed where the installation position display 122 is displayed, data transfer from the electronic blackboard 100 to the mobile terminal 200 is performed. In this case, even if the user is near the electronic blackboard 100, only a user who is in a limited position can easily acquire the data related to the display image 121. That is, data can be easily transferred while ensuring information security.

Further, as shown in FIG. 12, instead of displaying the operation button 124, the save operation may be instructed by drawing an instruction image 1241 composed of a specific locus on the touch display 120. In this case, the installation position display 122 is displayed and the message 123 is displayed at the position corresponding to the installation sensor 131 corresponding to the vicinity of the position where the instruction image 1241 is drawn. The data transfer can be executed only by the user installing the mobile terminal 200 along the display.

Further, if a plurality of drawing areas can be held on the electronic blackboard 100 and each drawing area is managed like an individual page, the operation button 124 displayed in the drawing area corresponding to a certain page can be used. When the save operation is executed, the display may be as illustrated in FIG. In this case, as shown in FIG. 13, the installation position display 122 corresponds to each drawing area, and the thumbnail image 1231 of the display image 121 drawn in the drawing area is displayed on the installation position display 122. .. The user installs the mobile terminal 200 at a position corresponding to the installation position display 122 on which the thumbnail image 1231 for which data transfer is desired is displayed, so that the data transfer related to the corresponding display image 121 is executed. In this way, it is possible to easily and reliably transfer individual data among the plurality of display images 121.

≪Flow of data transfer processing≫
Next, the flow of processing in the electronic blackboard control program according to the present embodiment will be described with reference to the flowchart of FIG. 7. First, the processing is waited until the writing detection unit 11 detects the instruction of the save command to the operation button 124 (S601 / NO). When the writing detection unit 11 detects the instruction of the save command to the operation button 124 (S601 / YES), the detection position specifying unit 13 executes the terminal position specifying process (S602).

The process in S602 is a process of specifying a position where the mobile terminal 200 for transferring the display image 121 as a written image is installed. The position specification in S602 can be performed based on various conditions. For example, when the display position of the operation button 124 is displayed in the vicinity of the display area of the display image 121, the side closer to the display position of the operation button 124 is specified as the installation position of the terminal. Further, the position corresponding to the installation sensor 131 corresponding to the side where the display image 121 is not displayed in many areas may be specified as the installation position. Further, a position where the installation position display 122 displayed in the subsequent processing does not overlap with the display area of the display image 121 may be specified as the installation position. Further, the position of the terminal installation device 130 corresponding to the most different position from the last displayed display image 121 on the touch display 120 may be specified as the installation position.

Next, the image output unit 12 outputs the installation position display 122, which is a display clearly indicating the installation position specified in S602, to the display means (S603). The process in S603 is, for example, a process of displaying the installation position display 122, which is the transfer destination display, on the touch display 120 as shown in FIG. As illustrated in FIG. 8, the installation position display 122 is displayed above the terminal installation device 130 so that the correspondence can be recognized. As shown in FIG. 8, all the installation position display 122 corresponding to the terminal installation device 130 at the position where the mobile terminal 200 can be installed may be displayed, or only a part of the installation position display 122 may be displayed. good.

Next, the installation sensor 131 at the position corresponding to the installation position display 122 displayed in S603 is operated, and the communication antenna 132 corresponding to the position is made communicable (S604). In the process of S604, the antenna changeover switch 119 is switched back so as to connect the communication antenna 132 corresponding to the installation position specified by the detection position specifying unit 13 and the wireless module 118. Further, the transfer image generation unit 15 generates a written image to be transferred.

Next, a process of determining whether or not the installation sensor 131 corresponding to the specified installation position has installed the mobile terminal 200 is executed (S605). Here, the timer process is executed until the installation sensor 131 detects the mobile terminal 200 (S605 / NO), and the installation of the mobile terminal 200 is waited until a certain time elapses (S609 / NO). If the installation sensor 131 does not detect the mobile terminal 200 by the lapse of a certain time (S609 / YES), the image output unit 12 displays an error on the touch display 120 (S610).

An example of error display is shown with reference to FIG. As shown in FIG. 9, the error image 125, which is an error display, is displayed at a conspicuous position near the center of the touch display 120. This allows the user to recognize that the transfer of the written image has failed. When the error image 125 is displayed, a sound notifying the abnormal termination may be output from the audio speaker 116. Further, if the mobile terminal 200 is installed at the correct position within a predetermined time after the error image 125 is displayed and the installation sensor 131 normally detects the mobile terminal 200, the writing image transmission process is executed. May be good.

If the installation sensor 131 detects the mobile terminal 200 in the process of S605 (S605 / YES), the transfer image generation unit 15 generates a written image, and the image transfer unit 16 connects the mobile terminal 200 via a wireless line. And transfer the written image (S606). The communication method of the wireless line used here may be any one used for short-range wireless communication. For example, a method standardized as NFC (Near Field Communication) may be used, or Wi-fi, which is widely used in wireless communication with a PC, may be used.

Next, the transfer result determination unit 17 determines whether or not the writing image has been transferred normally (S607). Here, if the transfer of the written image is abnormal (S607 / NO), the error image 125 is displayed in S610 (see FIG. 9). In the process of S607, if the transfer of the written image is normal (S607 / YES), the image output unit 12 normally displays the written image on the display means (S608). Whether or not the transfer is normal can be determined based on whether the processing in S606 is completed within a certain time, or whether a notification indicating normal reception is received from the mobile terminal 200, or the like.

An example of normal display is shown with reference to FIG. As shown in FIG. 10, the normal image 126, which is a normal display, is displayed on the touch display 120 in such a manner that the relationship with the installation position display 122 corresponding to the position where the mobile terminal 200 is installed can be easily recognized. When the normal image 126 is displayed, a sound notifying the normal end may be output from the audio speaker 116.

[Effect of this embodiment]
According to the electronic blackboard 100 according to the present embodiment described above, the position of the terminal device to be the transfer destination of the "written data" obtained by converting the information written on the electronic blackboard surface into data is displayed on the electronic blackboard surface. Written data can be transferred only to the terminal device placed at that position.

10 Software control unit 11 Writing detection unit 12 Image output unit 13 Detection position identification unit 14 Device detection unit 15 Transfer image generation unit 16 Image transfer unit 17 Transfer result determination unit 20 Software control unit 21 Image reception unit 22 Reception result reply unit 23 Image storage unit 100 Electronic blackboard 110 Control means 111 CPU
112 ROM
113 RAM
114 Written detection I / F
115 Image output I / F
116 Audio Speaker 117 Installation Sensor I / F
118 Wireless module 119 Antenna changeover switch 120 Display means 121 Display image 122 Installation position display 123 Message 124 Operation button 125 Error image 126 Normal image 130 Terminal installation means 131 Installation sensor 132 Communication antenna 150 Internal bus 200 Mobile terminal 201 CPU
202 ROM
203 RAM
204 Flash memory 205 I / F
206 Display operation unit 207 Wireless module 208 Antenna 209 Internal bus 300 Electronic blackboard system

Japanese Unexamined Patent Publication No. 2013-136154

Claims (3)

An electronic blackboard device that displays a written image based on the indicated position on the display surface.
Sensors that detect mobile terminals and
A communication antenna that performs wireless communication between the mobile terminal detected by the sensor and the electronic blackboard device, and
An image transfer unit that transfers the written image to the mobile terminal detected by the sensor by the wireless communication via the communication antenna.
An electronic blackboard device characterized by being equipped with. The sensor is based on the installation pressure of the portable terminal detects the mobile terminal,
The electronic blackboard device according to claim 1. It is an image display method executed by an electronic blackboard device that displays a written image based on a designated position on a display surface.
A detection step to detect a mobile terminal and
A communication step in which the mobile terminal detected by the detection step and the electronic blackboard device perform wireless communication by a communication antenna,
An image transfer step of transferring the written image to the mobile terminal detected by the detection step by the wireless communication via the communication antenna, and an image transfer step.
Image display method having .

Images