JP2014233892A - Electronic blackboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hand over image files to a personal computer without using USB memories.SOLUTION: An electronic blackboard device includes: a writing screen; a reading part; a storage part; an interface; and a storage control part. The reading part reads drawings on the writing screen as image data. The storage part stores the image data. The interface transfers the image data to an external device. The storage control part performs control for making the external device store the image data when the external device having storage media storing the image data is connected to the interface, and for making the storage part store the image data when the external device having the storage media storing the image data is not connected to the interface.

Description

  Embodiments described herein relate generally to an electronic blackboard device.

  Conventionally, writing contents (for example, characters, figures, and tables) written with a writing instrument such as a marker pen in the writing area can be read with a scanner and converted into digital data, and the written contents can be printed or output as an image file from a printer. There is an electronic blackboard device.

  Such an electronic blackboard device is configured to output an image file to a USB memory when a USB (Universal Serial Bus) memory is connected in advance.

  However, in recent years, an increasing number of companies prohibit the use of USB memory in order to prevent information leakage. For this reason, it is difficult to save the written content as an image file.

  The electronic blackboard device of the embodiment includes a writing surface, a reading unit, a storage unit, an interface, and a storage control unit. The reading unit reads a drawing on the writing surface as image data. The storage unit stores the image data. The interface transfers the image data to an external device. When the external device having a storage medium for storing the image data is connected to the interface, the storage control unit stores the image data in the external device and stores the image data in the interface. When the external device having the storage medium is not connected, control is performed to store the image data in the storage unit.

FIG. 1 is a perspective view illustrating an electronic blackboard device according to an embodiment. FIG. 2 is a cross-sectional plan view schematically showing the internal structure of the electronic blackboard device. FIG. 3 is a longitudinal front view schematically showing the internal structure of the electronic blackboard device. FIG. 4 is a block diagram illustrating a hardware configuration of the electronic blackboard device. FIG. 5 is a front view showing the operation panel. FIG. 6 is a diagram illustrating a software configuration of the electronic blackboard device. FIG. 7 is a flowchart showing image file storage processing. FIG. 8 is a flowchart showing a process for invalidating the RAM disk without being operated for a certain period of time.

  Exemplary embodiments of an electronic blackboard device according to embodiments will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing an electronic blackboard device 100 according to the embodiment. FIG. 2 is a cross-sectional plan view schematically showing the internal structure of the electronic blackboard device 100. FIG. 3 is a longitudinal front view schematically showing the internal structure of the electronic blackboard device 100.

  As shown in FIG. 1, the electronic blackboard device 100 includes a pair of stands 101 and a rectangular frame 110 supported by the pair of stands 101 and is installed on a floor surface. The frame 110 has an opening 110a that is open on the writer side, and the surface opposite to the writer side is covered with a cover 110b (see FIG. 2). The frame 110 houses an endless belt-like writing sheet 102 for writing. The material of the writing sheet 102 is made of polyethylene or the like.

  In the electronic blackboard apparatus 100, a writing surface 103, which is a plate surface on which a writing sheet 102 of a portion exposed to the outside from the opening 110a on the writing person side of the frame 110 is written with a marker pen or the like, is written. It becomes. The written drawing can be easily erased by wiping with a cleaner impregnated with a solvent or the like.

  In addition, a printer for printing a drawing read by a CCD line sensor 304 (see FIGS. 2 and 3) on a sheet (not shown) at the lower right of the frame 110 when viewed from the writing surface 103 side. 104 is provided.

  The frame 110 is located above the writing surface 103, the left edge 112 and the right edge 113 located on both sides of the writing surface 103, and below the writing surface 103, toward the front side. And a lower shelf 114 formed to protrude.

  In the frame 110, the upper edge 111, the left edge 112, and the right edge 113 are connected via a left upper corner member 115 and an upper right corner member 116 disposed on both sides of the upper edge 111. . Further, in the frame 110, the lower shelf 114 is connected via a lower left corner member 117 and a lower right corner member 120 disposed below both the left edge 112 and the right edge 113.

  The lower shelf 114 of the frame 110 protrudes from the writing surface 103 to the near side. Thereby, the lower shelf 114 can receive marker powder generated when the drawing on the writing surface 103 is removed by the cleaner, in addition to the marker pen and the cleaner.

  An operation panel 107 for operating the electronic blackboard device 100 is integrally provided on the right edge 113 of the frame 110.

  Further, the lower right corner member 120 is provided with a power switch 141, a first USB port 142, a second USB port 143, and a third USB port 144. The power switch 141 performs an on / off operation of the electronic blackboard device 100. Different external devices are connected to the first USB port 142, the second USB port 143, and the third USB port 144, respectively. Specifically, the first USB port 142 is a connector to which the printer 104 is connected. The second USB port 143 is a connector to which the USB memory 150 (see FIG. 4) is connected. The third USB port 144 is a connector to which a personal computer 160 (see FIG. 4) that is an information processing apparatus is connected. Here, the USB memory 150 has a storage medium, and stores an image file that is written content.

  As shown in FIG. 2, a pair of rollers 201 that rotate and convey the writing sheet 102 are provided at both left and right ends in the frame 110 when viewed from the writing surface 103 side. The roller 201 has an axial center oriented in the vertical direction. An endless belt-like writing sheet 102 is stretched between the pair of rollers 201, and a motor 202 (see FIG. 4) is connected via a belt transmission mechanism (not shown). The roller 201 is rotated via a belt transmission mechanism (not shown) when the motor 202 is driven. By the rotation of the roller 201, the writing sheet 102 is rotated and conveyed with respect to the writing surface 103 in the left-right direction (forward / reverse direction). In other words, the sheet feeding unit that rotates and conveys the writing sheet 102 in the forward and reverse directions includes the roller 201, the belt transmission mechanism, and the motor 202.

  Immediately behind the writing surface 103 of the writing sheet 102, a writing board 251 for improving the writing property with respect to the writing surface 103 is disposed.

  On the side opposite to the writing surface 103 of the writing sheet 102 (hereinafter referred to as the back side of the writing sheet 102), there is an optical reading unit 203 for reading the drawing of characters, figures, etc. written on the writing surface 103 as image data. Provided. The optical reading unit 203 serving as a reading unit is on the back side of the writing sheet 102 and on the one roller 201 side. The optical reading unit 203 includes a light source 301 such as a fluorescent lamp for irradiating the writing sheet 102 with light.

  The electronic blackboard apparatus 100 includes a mirror 302 and a lens 303 as part of the optical reading unit 203. The optical reading unit 203 includes an optical system 305 that is a reduction optical system that irradiates light to the writing sheet 102 by the light source 301 and collects the reflected light, and a CCD that receives the light collected by the optical system 305. A line sensor 304.

  FIG. 4 is a block diagram illustrating a hardware configuration of the electronic blackboard device 100. As shown in FIG. 4, the electronic blackboard device 100 includes a CPU (Central Processing Unit) 401 that controls various operations. The CPU 401 is connected via a bus line 411 to a ROM (Read Only Memory) 402 that stores fixed data such as control programs and image processing parameters, and a RAM (Random Access) that temporarily stores various data and is used as a work area. Memory) 403 is connected. Note that the ROM 402 may be built in the CPU 401. The CPU 401 connects the operation panel 107, the motor 202, the image processing unit 404, the lighting circuit 405, the USB controller 406, and the power supply control unit 408 via the bus line 411.

  Here, FIG. 5 is a front view showing the operation panel 107. The operation panel 107 as an operation unit includes a print number button 107a, a print number display 107b, a density button 107c, a density display 107d, a sheet feed button 107e, and a copy / write button 107f. The number-of-prints button 107 a is a button for setting the number of prints of the drawing written on the writing surface 103. The number of prints can be set between 1 and 9. When the print number button 107a is pressed, the CPU 401 increases the print setting number by one. The print number display 107b displays the currently set number of prints.

  The density button 107c is a button for changing the color density at the time of printing. When the shade button 107c is pressed, the CPU 401 darkens the color when printing the drawing drawn on the writing surface 103. By darkening the color, the printer 104 can print a document with high visibility since it is printed in a dark color even when writing with a light-colored pen or a faint pen. The shade display 107d is lit when setting the color to darken with the shade button 107c.

  The sheet feed button 107e is a button for exposing the writing sheet 102 inside the frame to the writing surface 103 instead of the writing sheet 102 exposed on the writing surface 103. When the sheet feed button 107 e is pressed, the CPU 401 controls the motor 202 to rotate the roller 201 to expose the writing sheet 102 inside the frame on the writing surface 103.

  The copy / write button 107 f is a button for printing the image file generated by reading the writing surface 103. At that time, the CPU 401 stores the image file in either the USB memory 150 or the RAM disk 403b (see FIG. 6).

  As described above, the motor 202 rotates and conveys the writing sheet 102 in the left-right direction (forward / reverse direction) with respect to the writing surface 103 by rotating the roller 201.

  The image processing unit 404 performs amplification by an amplifier (not shown) and offset correction by an offset circuit (not shown) on the electrical signal read by the CCD line sensor 304 for each line. Thereafter, the image processing unit 404 converts the image data into digital signal image data by an A / D conversion unit (not shown). After conversion to image data, the image processing unit 404 causes the RAM 403 to store image data that has undergone shading correction by a shading correction circuit (not shown) and lightness correction by a lightness correction circuit (not shown).

  The lighting circuit 405 controls the lighting of the light source 301 described above.

  A USB controller 406 serving as an interface controls transfer with a USB device. The USB device is connected via the printer 104 connected via the first USB port 142, the USB memory 150 connected via the second USB port 143, and the third USB port 144. A personal computer 160 or the like.

  When a USB device is connected to the USB port, the USB controller 406 recognizes the USB device. Thereafter, the USB controller 406 assigns an address to the connected USB device.

  Thereafter, the USB controller 406 starts acquiring the descriptor of the USB device. The descriptor is information including device characteristics and attributes. Descriptor types include device descriptors, configuration descriptors, interface descriptors, and endpoint descriptors.

  The device descriptor has information for identifying the USB device that transmitted the descriptor. The device descriptor information includes, for example, a device class, a vendor ID, a product ID, a release number, and the number of configurations.

  The configuration descriptor includes USB configuration information of the device, and has information indicating the number of interface descriptors and endpoint descriptors. The interface descriptor includes interface information and information indicating the specifications of the interface. The endpoint descriptor has information on an endpoint that is a communication port.

  The USB controller 406 controls data transfer based on information obtained by acquiring the descriptor. Also, the USB controller 406 determines whether or not the USB device class obtained by acquiring the descriptor is a device class that can be connected to an auxiliary storage device such as a USB mass storage class.

  Each of the three USB ports in the electronic blackboard device 100 preferably has a different connector type. For example, a Type B connector is used for the first USB port 142 to which the printer 104 is connected and the third USB port 144 to which the personal computer 160 is connected. The second USB port 143 to which the USB memory 150 is connected employs Type A. By changing the type of connector, the shape of the connector changes, so that the user does not mistake the USB port into which the USB device is inserted.

  The power control unit 408 is connected to the CPU 401 via the bus line 411 and operates the power control unit 408 with the power switch 141 to turn on and off the electronic blackboard device 100.

  A process executed by the CPU 401 according to the software stored in the ROM 402 in the electronic blackboard apparatus 100 configured as described above will be described.

  Here, FIG. 6 is a diagram illustrating a software configuration of the electronic blackboard device 100. The software of the electronic blackboard device 100 performs various controls in cooperation with the CPU 401. By cooperating with the software, the CPU 401 uses the RAM 403 as a storage area. The CPU 401 includes a board reading unit 401a, an image file creation unit 401b, a RAM disk control unit 401c, a USB memory output unit 401d, and a printer output unit 401e. The RAM 403 includes a work area 403a and a RAM disk 403b.

  The work area 403a is an area used when generating an image file.

  The RAM disk 403b serving as a storage unit is an area where image files are stored. The RAM disk 403b is a volatile memory that cannot hold information when power is not supplied. Therefore, when the power switch 141 is OFF, the image file is deleted from the RMA disk.

  In addition, when a new image file is stored in the RAM disk 403b, the existing image file is deleted from the RAM disk 403b under the control of the CPU 401 described later. By deleting the image file, the RAM disk 403b can prevent a capacity shortage when storing a new image file. In addition, the image file is deleted from the RAM disk 403b even when the operation is not performed for a certain period of time. Therefore, the RAM disk 403b can prevent information leakage even when, for example, the user forgets to delete the image file without turning off the power switch 141.

  The RAM disk 403b can be referred to by the personal computer 160 via the third USB port 144. Therefore, the personal computer 160 can refer to the image file on the RAM disk 403 b and transfer the image file to the personal computer 160. The RAM disk 403b is a read-only area for the personal computer 160. Since it is read-only, the RAM disk 403b can prevent the stored image file from being rewritten. Further, since it is read-only, the RAM disk 403b can prevent an unintended file from being saved by the user. Since an unintended file is not saved, the RAM disk 403b can prevent a shortage of storage area when generating and saving a new image file.

  The board surface reading unit 401 a controls the motor 202, the lighting circuit 405, and the CCD line sensor 304 to read the drawing on the writing surface 103. The board surface reading unit 401a drives the motor 202 to rotate and convey it. At that time, the board surface reading unit 401 a controls the lighting circuit 405 to irradiate the writing sheet 102 with the light from the light source 301 and causes the CCD line sensor 304 to receive the reflected light. Thereby, the board surface reading part 401a reads the drawing of the writing surface 103, and produces | generates an electrical signal.

  The image file creation unit 401b controls the image processing unit 404 to generate an image file. The image file creation unit 401b performs A / D conversion after amplifying and correcting the electrical signal read and generated for each line by the CCD line sensor 304. Thereafter, the image file creation unit 401b generates an image file from the A / D converted digital signal. The image file format of the image file is, for example, the TIFF format.

  Thereafter, the image file creation unit 401b, which is a storage control unit, determines whether to output the image file to the USB memory 150 or the RAM disk 403b. The image file creation unit 401 b outputs an image file to the USB memory 150 when the USB memory 150 is connected to the second USB port 143. On the other hand, the image file creation unit 401b outputs an image file to the RAM disk 403b when the USB memory 150 is not connected to the second USB port 143.

  Here, the file name of the image file is, for example, TB_IMGnn. TIF. The file name nn is incremented by one from 01 to 99 when the copy / write button 107f is pressed. The file name nn becomes 00 when the power switch 141 is turned OFF or when nn becomes 99. Thus, the image file is not overwritten and saved without changing the file name every time the copy / write button 107f is pressed.

  The RAM disk control unit 401c, which is a reference control unit, controls the storage of the image file in the RAM disk 403b and the transition of the RAM disk 403b to an invalid state. The invalid state of the RAM disk 403b means that the personal computer 160 cannot refer to the RAM disk 403b.

  The storage of the image file in the RAM disk 403b will be described. The RAM disk control unit 401c controls saving to the RAM disk 403b when the image file creation unit 401b determines to save the image file to the RAM disk 403b. When the image file is stored in the RAM disk 403b, if the previous image file is stored in the RAM disk 403b, the image file creation unit 401b stores the new image file after deleting the old image file.

  The RAM disk control unit 401c disables the RAM disk 403b when the power switch 141 is OFF, when no operation is performed for a certain period of time, and during the period from reading the board surface of the board surface reading unit 401a to the completion of printing. To.

  The control for disabling the RAM disk 403b when the power switch 141 is OFF will be described. When the power control unit 408 is OFF, the RAM disk control unit 401c performs control to shift the RAM disk 403b to an invalid state.

  A description will be given of control for disabling the RAM disk 403b when no operation is performed for a certain period of time. The RAM disk control unit 401c disables the RAM disk 403b when none of the buttons on the operation panel 107 is pressed within a certain time. The RAM disk control unit 401c stores the value of a counter that measures a predetermined time in a partial area of the work area 403a. The RAM disk control unit 401c counts down until the button is pressed. When the counter value becomes zero, the RAM disk control unit 401c determines that a certain time has elapsed without the button being pressed. Moreover, the fixed time is, for example, one hour.

  A description will be given of the control in which the board reading unit 401a disables the RAM disk 403b only during the period from the start of reading the writing surface 103 to the completion of printing. When the copy / write button 107f on the operation panel 107 is pressed, the RAM disk control unit 401c disables the RAM disk 403b. Thereafter, the RAM disk control unit 401c activates the RAM disk 403b in response to storage in the RAM disk 403b and notification from the printer output unit 401e that printing has been completed.

  The RAM disk control unit 401c can prevent the user from misunderstanding that the image file being generated is a completed image file by disabling the RAM disk 403b. In addition, when the personal computer 160 accesses the RAM disk 403b, the CPU 401 must respond. However, since the RAM disk 403b cannot be referred to by disabling the RAM disk 403b, the CPU 401 does not need to respond. Therefore, since the electronic blackboard apparatus 100 can employ the CPU 401 with lower performance, the electronic blackboard apparatus 100 can be created with low power consumption and low cost.

  Further, when the RAM disk 403b shifts to an invalid state, the RAM disk control unit 401c deletes the image file on the RAM disk 403b. Information leakage can be prevented by automatically deleting an image file after a certain period of time.

  The USB memory output unit 401 d controls the USB controller 406 to store the image file in the USB memory 150. The USB memory output unit 401d controls the storage in the USB memory 150 when the image file creation unit 401b determines to store the image file in the USB memory 150.

  The printer output unit 401e, which is a print control unit, performs control to print the image file generated by the image file creation unit 401b with designated settings. Specifically, the printer output unit 401e uses a part of the work area 403a as an area for storing the number of prints designated by the print number button 107a. Then, the printer output unit 401e displays the number of prints set by the number-of-prints button 107a on the number-of-prints display 107b.

  In addition, the printer output unit 401e uses a part of the work area 403a as an area for storing the darkness specified by the light / dark button 107c. Then, the printer output unit 401e displays the density set by the density button 107c on the density display 107d. When the copy / write button 107f is pressed, the printer output unit 401e controls the printer 104 to print the set number of image files with the set density.

  Next, processing when the copy / write button 107f is pressed and an image file is saved will be described. FIG. 7 is a flowchart showing image file storage processing.

  When the power switch 141 is pressed, the power control unit 408 turns on the power of the electronic blackboard device 100 (step S1).

  When the print number button 107a on the operation panel 107 is pressed, the printer output unit 401e stores the designated print number in the work area 403a (step S2). In addition, the printer output unit 401e displays the designated number on the number-of-prints display 107b.

  When the shading button 107c on the operation panel 107 is pressed, the printer output unit 401e stores the designated darkness in the work area 403a (step S3). Further, the printer output unit 401e displays the designated darkness on the light / dark display 107d.

  When the copy / write button 107f on the operation panel 107 is pressed, the RAM disk control unit 401c disables the RAM disk 403b (step S4). Thereafter, the RAM disk control unit 401c deletes the image file stored in the RAM disk 403b (step S5).

  Thereafter, the board surface reading unit 401a controls the motor 202, the lighting circuit 405, and the CCD line sensor 304 to read the drawing on the writing surface 103 (step S6).

  When the reading of the writing surface 103 is completed, the image file creation unit 401b controls the image processing unit 404 to generate an image file (step S7).

  The printer output unit 401e starts printing the generated image file according to the designated setting by controlling the printer 104 (step S8).

  The image file creation unit 401b controls the USB controller 406 to determine whether or not the second USB port 143 is connected by USB (step S9). If the USB connection is not established (step S9; No), the RAM disk control unit 401c writes the generated image file to the RAM disk 403b (step S10).

  On the other hand, when the USB connection is established (step S9; Yes), the USB memory output unit 401d determines whether the device class of the acquired descriptor is a device class that can connect an auxiliary storage device such as the USB memory 150. Is determined (step S11).

  In the case of a device class to which an auxiliary storage device such as the USB memory 150 cannot be connected (step S11; No), the RAM disk control unit 401c writes the image file to the RAM disk 403b (step S10). On the other hand, in the case of a device class to which an auxiliary storage device such as the USB memory 150 can be connected (step S11; Yes), the USB memory output unit 401d writes the image file to the USB memory 150 (step S12).

  Thereafter, when the printing and writing of the image file are completed, the RAM disk control unit 401c puts the RAM disk 403b into a valid state (step S13).

  Next, a case will be described in which the operation is not performed for a certain period of time and the RAM disk 403b is disabled. FIG. 8 is a flowchart showing a process for disabling the RAM disk 403b when no operation is performed for a certain period of time.

  When the power switch 141 is pressed, the power controller 408 turns on the electronic blackboard device 100 (step T1).

  Thereafter, the RAM disk control unit 401c determines whether or not a certain time has elapsed until any button on the operation panel 107 is pressed (step T2). If the predetermined time has not elapsed (step T2; No), the RAM disk control unit 401c determines whether or not the button on the operation panel 107 has been pressed (step T3). When the button is not pressed (step T3; No), the RAM disk control unit 401c counts down the counter (step T4). Thereafter, the RAM disk control unit 401c proceeds to step T2. On the other hand, when the button is pressed (step T3; Yes), the counter is initialized and returned to the initial value (step T5). Thereafter, the RAM disk control unit 401c proceeds to step T2.

  When the predetermined time has elapsed (step T2; Yes), the RAM disk control unit 401c disables the RAM disk 403b (step T6). At that time, the RAM disk control unit 401c deletes the image file stored in the RAM disk 403b (step T7).

  As described above, according to the electronic blackboard device 100 according to the present embodiment, the image file generated by reading the writing surface 103 is stored in the RAM disk 403b when the USB memory 150 is not connected. As a result, the image file can be saved even in an environment where the USB memory 150 cannot be used.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the present embodiment, in the electronic blackboard device 100, the roller 201 rotates and conveys the writing sheet 102. The electronic blackboard apparatus 100 reads image data by reading a drawing written on the writing sheet 102 by a fixed CCD line sensor 304. However, the method of reading image data by the electronic blackboard device 100 is not limited to this. For example, the image data reading method may be a method in which an image scanner is provided on a writing surface 103 such as a whiteboard of the electronic blackboard apparatus 100, and the drawing is read by the image scanner moving on the whiteboard.

  In the present embodiment, the file name of the image file is TB_IMGnn. TIF, indicating that the image file format is the TIFF format. However, the image file format is not limited to this. For example, a PDF format or a JPEG format may be used.

  In the present embodiment, the RAM disk 403b employs a volatile memory. However, the RAM disk 403b may be a non-volatile memory. In the case of a non-volatile memory, the RAM disk 403b only needs to turn off the power switch 141 after deleting the image file when the power switch 141 is turned off.

  In the present embodiment, the image file is stored in the RAM disk 403b. However, the storage medium for storing the image file is not limited to the RAM 403. For example, a magnetic disk, an optical disk, a flash memory, an SSD (Solid State Drive), an HDD (Hard disk drive), or the like may be used.

  In the present embodiment, the image file is stored in the USB memory 150, but the external storage device is not limited to the USB memory. For example, an external magnetic disk, an external optical disk, an external SSD, an external HDD, or the like may be used.

  In this embodiment, the connection interface between the electronic blackboard device and the external device is USB, but the connection interface is not limited to this. For example, Ethernet (registered trademark), IEEE 1394, eSATA (External Serial ATA), wireless LAN, Bluetooth (registered trademark), or the like may be used.

  In addition, the program executed by each device of the above embodiment is provided by being incorporated in advance in a storage medium (ROM or storage unit) included in each device. Various types of files may be recorded and provided on a computer-readable recording medium such as a CD-ROM, a flexible disk (FD), a CD-R, or a DVD (Digital Versatile Disk). Furthermore, the storage medium is not limited to a medium independent of a computer or an embedded system, but also includes a storage medium that downloads and stores or temporarily stores a program transmitted via a LAN, the Internet, or the like.

  Further, the program executed by each device of the above embodiment may be stored on a computer connected to a network such as the Internet and provided by being downloaded via the network, or via a network such as the Internet. It may be configured to be provided or distributed.

DESCRIPTION OF SYMBOLS 100 Electronic blackboard apparatus 102 Writing sheet 103 Writing surface 107 Operation panel 142 1st USB port 143 2nd USB port 144 3rd USB port 150 USB memory 160 Personal computer 202 Motor 401a Board surface reading part 401b Image file creation part (memory | storage) Control part)
401c RAM disk control unit (reference control unit)
401d USB memory output unit 401e Printer output unit (print control unit)
403b RAM disk

JP 2008-49594 A

Claims (6)

Writing surface,
A reading unit for reading the drawing on the writing surface as image data;
A storage unit for storing the image data;
An interface for transferring the image data to an external device;
When the external device having a storage medium for storing the image data is connected to the interface, the image data is stored in the external device and the storage device stores the image data in the interface. When an external device is not connected, a storage control unit that performs control to store the image data in the storage unit;
An electronic blackboard device comprising: A reference control unit that controls reference to the storage unit by the information processing device when an information processing device is connected to the interface as the external device;
Further comprising
The electronic blackboard apparatus according to claim 1. A print control unit for controlling printing of the image data;
Further comprising
The reference control unit controls the information processing apparatus so that the storage unit cannot be referenced during a period from when the reading unit starts reading a drawing to when the print control unit completes printing.
The electronic blackboard apparatus according to claim 2. An operation unit to which an operation relating to reading of drawing on the writing surface of the reading unit is input;
Further comprising
The reference control unit controls the information processing apparatus to a state in which the storage unit cannot be referred to when a predetermined time has passed without an operation being input from the operation unit.
The electronic blackboard apparatus according to claim 2 or 3. The storage unit is a read-only storage medium for the information processing apparatus.
The electronic blackboard device according to any one of claims 1 to 4. The storage control unit deletes the image data when a predetermined time has passed without being operated from the operation unit,
The electronic blackboard device according to any one of claims 1 to 5.

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